diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 20194cd8..a0d2ee6c 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -74,12 +74,18 @@ jobs: strategy: fail-fast: false matrix: - os: [ubuntu-latest, macos-latest] + os: [ubuntu-latest, macos-latest, windows-latest] # Bundled regrtests are required to pass (see RFC 0026). The # runner gates on `tests/regrtest/expectations.toml` by default, so # any divergence — pass → fail, fail → pass — fails the job. Pull # requests update both the test and the baseline in the same # commit. + # + # The windows leg is advisory via the baseline's `measured_os` + # stamp (RFC 0063 WS7), not via CI config: the runner prints the + # full report, uploads the measured artifact below, and exits 0 on + # unexpected results until a measured Windows baseline is + # transplanted and "windows" joins the stamp. steps: - uses: actions/checkout@v4 - uses: dtolnay/rust-toolchain@stable @@ -87,6 +93,7 @@ jobs: - name: Build weavepy CLI run: cargo build --release -p weavepy-cli - name: Run bundled regrtests (subprocess, parallel) + shell: bash run: | cargo run --release -p weavepy-cli -- regrtest \ --mode subprocess \ @@ -94,6 +101,7 @@ jobs: --timeout 60 - name: Append regrtest report to job summary if: always() + shell: bash run: | { echo "## WeavePy regrtest" @@ -113,7 +121,7 @@ jobs: strategy: fail-fast: false matrix: - os: [ubuntu-latest, macos-latest] + os: [ubuntu-latest, macos-latest, windows-latest] # RFC 0058 — the benchmark lane. Gates on WeavePy/CPython *ratios* # against the per-platform baselines/bench-{os}-{arch}.json (RFC # 0062 WS3; host-independent, unlike absolute times); the 25% @@ -129,18 +137,21 @@ jobs: - name: Build weavepy CLI + bench harness run: cargo build --release -p weavepy-cli -p weavepy-bench - name: Run bench gate - # Linux has no committed per-platform baseline yet, so the gate - # is advisory there (--allow-missing-baseline prints a note and - # exits 0). It graduates to strict once a measured - # bench-linux-x86_64.json is committed — drop the flag then. - # macOS gates strictly against bench-macos-aarch64.json. + # Linux and Windows have no committed per-platform baseline + # yet, so the gate is advisory there (--allow-missing-baseline + # prints a note and exits 0). Each leg graduates to strict once + # its measured bench-{os}-x86_64.json is committed — drop the + # flag for that OS then (RFC 0062 for linux, RFC 0063 for + # windows). macOS gates strictly against bench-macos-aarch64.json. + shell: bash run: | target/release/weavepy-bench gate --pct=25 \ --weavepy=target/release/weavepy \ - ${{ matrix.os == 'ubuntu-latest' && '--allow-missing-baseline' || '' }} \ + ${{ (matrix.os == 'ubuntu-latest' || matrix.os == 'windows-latest') && '--allow-missing-baseline' || '' }} \ | tee bench-report.md - name: Append bench report to job summary if: always() + shell: bash run: | { echo "## WeavePy bench" @@ -160,7 +171,7 @@ jobs: strategy: fail-fast: false matrix: - os: [ubuntu-latest, macos-latest] + os: [ubuntu-latest, macos-latest, windows-latest] # RFC 0062 WS3 — the ecosystem lane in CI. Installs the manifest's # packages from an offline wheel cache into venvs running under the # built weavepy, runs each row's probe (and package self-tests), @@ -168,6 +179,9 @@ jobs: # policy as regrtest. The host CPython is only used by the wheel # fetcher (pip download needs a real Python); the runners' system # cc covers source builds. + # + # The windows leg is advisory via the baseline's `measured_os` + # stamp (RFC 0063 WS7), not via CI config — see the regrtest job. steps: - uses: actions/checkout@v4 - uses: dtolnay/rust-toolchain@stable @@ -183,8 +197,12 @@ jobs: - name: Build weavepy CLI run: cargo build --release -p weavepy-cli - name: Fetch ecosystem wheels (no-op on cache hit) - run: python3 tools/ecosystem_fetch.py --dest target/ecosystem-wheels + # `python`, not `python3`: setup-python exposes both on + # ubuntu/macos (same 3.13 interpreter) but only `python` on + # windows runners. + run: python tools/ecosystem_fetch.py --dest target/ecosystem-wheels - name: Run ecosystem harness + shell: bash run: | cargo run --release -p weavepy-conformance -- ecosystem \ --wheels target/ecosystem-wheels \ @@ -197,11 +215,13 @@ jobs: strategy: fail-fast: false matrix: - os: [ubuntu-latest, macos-latest] + os: [ubuntu-latest, macos-latest, windows-latest] # RFC 0062 — builds the relocatable artifact from the release CLI # and runs `weavepy-dist check` against it (boot, stdlib, venv + # pip smoke). The pip leg reuses the offline wheel cache from the - # ecosystem job's actions/cache key. + # ecosystem job's actions/cache key. On windows the builder emits + # the RFC 0063 WS6 zip artifact / NT layout; the check command is + # identical. steps: - uses: actions/checkout@v4 - uses: dtolnay/rust-toolchain@stable @@ -217,8 +237,12 @@ jobs: - name: Build weavepy CLI run: cargo build --release -p weavepy-cli - name: Fetch ecosystem wheels (no-op on cache hit) - run: python3 tools/ecosystem_fetch.py --dest target/ecosystem-wheels + # `python`, not `python3`: setup-python exposes both on + # ubuntu/macos (same 3.13 interpreter) but only `python` on + # windows runners. + run: python tools/ecosystem_fetch.py --dest target/ecosystem-wheels - name: Run dist check + shell: bash run: | cargo run --release -p weavepy-dist -- check \ --wheels target/ecosystem-wheels diff --git a/Cargo.lock b/Cargo.lock index 0b8fe699..1763b7c3 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -2846,6 +2846,7 @@ dependencies = [ "weavepy-lexer", "weavepy-parser", "webpki-roots 0.26.11", + "windows-sys 0.61.2", "x509-parser", "xz2", ] diff --git a/Cargo.toml b/Cargo.toml index 91134d10..039fefd1 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -140,6 +140,34 @@ parking_lot = "0.12" crossbeam-channel = "0.5" crossbeam-utils = "0.8" +# RFC 0063 — the Windows wave: NT-native stdlib core (`_winapi`, +# `msvcrt`, `winreg`, `_overlapped`, the CRT fd model, Winsock +# `select`). Target-scoped to Windows builds only; the feature list +# is the union of the Win32 namespaces those modules consume. +windows-sys = { version = "0.61", features = [ + "Win32_Foundation", + "Win32_Globalization", + "Win32_Networking_WinSock", + "Win32_Security", + "Win32_Security_Cryptography", + "Win32_Storage_FileSystem", + "Win32_System_Console", + "Win32_System_Diagnostics_Debug", + "Win32_System_Environment", + "Win32_System_IO", + "Win32_System_Ioctl", + "Win32_System_LibraryLoader", + "Win32_System_Memory", + "Win32_System_Pipes", + "Win32_System_Registry", + "Win32_System_SystemInformation", + "Win32_System_SystemServices", + "Win32_System_Threading", + "Win32_System_WindowsProgramming", + "Win32_UI_Shell", + "Win32_UI_WindowsAndMessaging", +] } + # RFC 0032 — tier-2 JIT backend (Cranelift). Only compiled when the # `jit` feature is enabled (off by default); CI exercises it via # `--all-features`. 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(requires the CPython column so the baseline carries ratios). //! - `gate` — runs the suite, compares WeavePy/CPython ratios (and //! the suite geomean) against the host platform's baseline, and -//! exits non-zero on regressions beyond the threshold. Missing -//! per-platform baselines are an error unless +//! exits non-zero on regressions beyond the threshold. Regressed +//! fixtures are re-measured once first — a regression must survive +//! the retry to fail the gate, which rejects one-off noise +//! excursions on shared CI runners without loosening the threshold. +//! Missing per-platform baselines are an error unless //! `--allow-missing-baseline` makes the gate advisory (RFC 0062 //! WS3). //! @@ -23,9 +26,9 @@ use std::io; use std::path::{Path, PathBuf}; use std::process::ExitCode; -use weavepy_bench::fixtures::{baseline_path, platform_key}; +use weavepy_bench::fixtures::{baseline_path, discover_fixtures, platform_key}; use weavepy_bench::report::Report; -use weavepy_bench::runner::{run_suite, RunOpts}; +use weavepy_bench::runner::{resolve_python, resolve_weavepy, run_one, run_suite, RunOpts}; fn main() -> ExitCode { let args: Vec = env::args().collect(); @@ -171,7 +174,7 @@ fn cmd_gate(args: &[String]) -> io::Result { let host_platform = platform_key(); let baseline = load_baseline(&baseline_path(), &host_platform, allow_missing)?; let rows = run_suite(&opts)?; - let report = Report::new(rows); + let mut report = Report::new(rows); println!("{}", report.to_markdown()); let Some(baseline) = baseline else { println!("=============================================================="); @@ -182,7 +185,72 @@ fn cmd_gate(args: &[String]) -> io::Result { println!("=============================================================="); return Ok(true); }; - let regs = report.regressions(&baseline, pct); + let mut regs = report.regressions(&baseline, pct); + + // Shared CI runners take multi-second noise excursions that land + // squarely on whichever fixture is running (observed: deltablue + // jumping +51% on one macos-latest run while the suite geomean sat + // *below* baseline). Re-measure just the regressed fixtures once + // and keep the better measurement of the two: noise only inflates + // ratios, so the minimum is the truer estimate, while a genuine + // regression reproduces on the retry and still fails the gate. + let retry_names = report.regressed_fixture_names(&baseline, pct); + if !retry_names.is_empty() { + println!( + "RETRY: re-measuring {} regressed fixture(s) to reject one-off runner noise: {}", + retry_names.len(), + retry_names.join(", ") + ); + let weavepy = resolve_weavepy(&opts)?; + let python = if opts.include_cpython { + Some(resolve_python(&opts)?) + } else { + None + }; + let mut rows = report.rows; + for fix in discover_fixtures() { + if !retry_names.contains(&fix.name) { + continue; + } + let retry = run_one(&fix, &opts, &weavepy, python.as_deref())?; + let slot = rows + .iter_mut() + .find(|r| r.name == fix.name) + .expect("regressed fixture has a report row"); + let better = match (retry.ratio, slot.ratio) { + (Some(nr), Some(or)) => nr < or, + _ => retry.weavepy.median_ns < slot.weavepy.median_ns, + }; + match (slot.ratio, retry.ratio) { + (Some(or), Some(nr)) => println!( + " {}: {:.2}× -> {:.2}× on retry ({})", + fix.name, + or, + nr, + if better { + "kept retry" + } else { + "kept original" + } + ), + _ => println!( + " {}: re-measured ({})", + fix.name, + if better { + "kept retry" + } else { + "kept original" + } + ), + } + if better { + *slot = retry; + } + } + report = Report::new(rows); + regs = report.regressions(&baseline, pct); + } + if regs.is_empty() { println!("OK: no ratio regressions over {pct:.1}%"); Ok(true) diff --git a/crates/weavepy-bench/src/report.rs b/crates/weavepy-bench/src/report.rs index de952f62..3d877cff 100644 --- a/crates/weavepy-bench/src/report.rs +++ b/crates/weavepy-bench/src/report.rs @@ -263,32 +263,8 @@ impl Report { )); continue; }; - match (new.ratio, old.ratio) { - (Some(nr), Some(or)) if or > 0.0 => { - if nr > or * factor { - out.push(format!( - "{}: ratio {:.2}× -> {:.2}× vs CPython ({:+.1}%)", - new.name, - or, - nr, - 100.0 * (nr - or) / or, - )); - } - } - _ => { - if old.weavepy.median_ns > 0.0 - && new.weavepy.median_ns > old.weavepy.median_ns * factor - { - out.push(format!( - "{}: median {} -> {} ({:+.1}%; absolute fallback — no ratio in baseline)", - new.name, - format_ns(old.weavepy.median_ns), - format_ns(new.weavepy.median_ns), - 100.0 * (new.weavepy.median_ns - old.weavepy.median_ns) - / old.weavepy.median_ns, - )); - } - } + if let Some(msg) = row_regression(new, old, factor) { + out.push(msg); } } if let (Some(ng), Some(og)) = (self.geomean_ratio, baseline.geomean_ratio) { @@ -303,6 +279,54 @@ impl Report { } out } + + /// Names of fixtures whose row fails the same per-row test as + /// [`Self::regressions`] — what `gate`'s noise-rejection retry + /// re-measures. Excludes the geomean entry (not a fixture) and + /// missing-baseline rows (re-running can't produce a baseline). + pub fn regressed_fixture_names(&self, baseline: &Report, pct_threshold: f64) -> Vec { + let factor = 1.0 + pct_threshold / 100.0; + self.rows + .iter() + .filter(|new| { + baseline + .rows + .iter() + .find(|r| r.name == new.name) + .is_some_and(|old| row_regression(new, old, factor).is_some()) + }) + .map(|r| r.name.clone()) + .collect() + } +} + +/// The per-fixture gate test: `Some(description)` when `new` regressed +/// past `factor` against the baseline row `old`. Ratios compare when +/// both rows carry one (host-independent); otherwise the absolute +/// WeavePy median is the fallback. +fn row_regression(new: &Row, old: &Row, factor: f64) -> Option { + match (new.ratio, old.ratio) { + (Some(nr), Some(or)) if or > 0.0 => (nr > or * factor).then(|| { + format!( + "{}: ratio {:.2}× -> {:.2}× vs CPython ({:+.1}%)", + new.name, + or, + nr, + 100.0 * (nr - or) / or, + ) + }), + _ => (old.weavepy.median_ns > 0.0 + && new.weavepy.median_ns > old.weavepy.median_ns * factor) + .then(|| { + format!( + "{}: median {} -> {} ({:+.1}%; absolute fallback — no ratio in baseline)", + new.name, + format_ns(old.weavepy.median_ns), + format_ns(new.weavepy.median_ns), + 100.0 * (new.weavepy.median_ns - old.weavepy.median_ns) / old.weavepy.median_ns, + ) + }), + } } fn format_bytes(b: u64) -> String { diff --git a/crates/weavepy-capi/src/mirror.rs b/crates/weavepy-capi/src/mirror.rs index 2305af9f..249743e6 100644 --- a/crates/weavepy-capi/src/mirror.rs +++ b/crates/weavepy-capi/src/mirror.rs @@ -1148,9 +1148,9 @@ pub unsafe fn sync_set_used(p: *mut PyObject) { } } -/// Re-publish the macro-visible size of a dict/set mirror after it may -/// have been mutated in place through the C boundary. A cheap no-op for -/// any pointer that isn't one of those two faithful mirrors (the +/// Re-publish the macro-visible state of a dict/set/list mirror after it +/// may have been mutated in place through the C boundary. A cheap no-op +/// for any pointer that isn't one of those faithful mirrors (the /// [`is_mirror`] magic check gates the type comparison), so it is safe to /// sprinkle over the generic call path. /// @@ -1164,6 +1164,14 @@ pub unsafe fn sync_container_size(p: *mut PyObject) { unsafe { sync_dict_ma_used(p) }; } else if unsafe { is_faithful_set(p) } { unsafe { sync_set_used(p) }; + } else if unsafe { is_faithful_list(p) } { + // A seeded list mutated by a VM method call issued from *inside* a + // C frame (`lg_inclusion_list.remove(...)` in Cython-compiled + // charset_normalizer 3.5.0) never reaches the outermost-boundary + // [`flush_seeded_lists`] before the extension's next inlined + // `PyList_GET_ITEM`/`Py_SIZE` macro read — so re-publish this one + // list here. Fingerprint-gated, so an unmutated list stays free. + unsafe { sync_list_ob_item(p) }; } } diff --git a/crates/weavepy-cli/src/regrtest_cmd.rs b/crates/weavepy-cli/src/regrtest_cmd.rs index 38dd2957..84784eab 100644 --- a/crates/weavepy-cli/src/regrtest_cmd.rs +++ b/crates/weavepy-cli/src/regrtest_cmd.rs @@ -205,7 +205,10 @@ pub(crate) fn run(argv: Vec) -> Result { report_dir.display() ); - if !cli.no_check && summary.unexpected > 0 { + // RFC 0063 WS7: on a host OS outside the baseline's `measured_os` + // stamp the gate is advisory — the helper prints the NOTE line and + // returns false, so the run exits 0 with the reports still written. + if !cli.no_check && weavepy_conformance::regrtest::strict_gate_blocks(&expectations, &summary) { return Ok(ExitCode::from(1)); } Ok(ExitCode::SUCCESS) diff --git a/crates/weavepy-conformance/src/bin/main.rs b/crates/weavepy-conformance/src/bin/main.rs index 1ecad658..2256ac79 100644 --- a/crates/weavepy-conformance/src/bin/main.rs +++ b/crates/weavepy-conformance/src/bin/main.rs @@ -391,7 +391,10 @@ fn cmd_ecosystem(workspace: &Path, report_dir: &Path, args: EcosystemArgs) -> Re report_dir.display() ); - if args.strict && summary.unexpected > 0 { + // RFC 0063 WS7: on a host OS outside the baseline's `measured_os` + // stamp the gate is advisory — the helper prints the NOTE line and + // returns false, so the run exits 0 with the reports still written. + if args.strict && ecosystem::strict_gate_blocks(&expectations, &summary) { anyhow::bail!( "{} ecosystem regression(s) — see {}", summary.unexpected, @@ -557,7 +560,10 @@ fn cmd_regrtest(workspace: &Path, report_dir: &Path, args: RegrtestArgs<'_>) -> report_dir.display() ); - if args.strict && summary.unexpected > 0 { + // RFC 0063 WS7: on a host OS outside the baseline's `measured_os` + // stamp the gate is advisory — the helper prints the NOTE line and + // returns false, so the run exits 0 with the reports still written. + if args.strict && regrtest::strict_gate_blocks(&expectations, &summary) { anyhow::bail!( "{} regrtest regression(s) — see {}", summary.unexpected, diff --git a/crates/weavepy-conformance/src/ecosystem.rs b/crates/weavepy-conformance/src/ecosystem.rs index 440a3607..1c23deea 100644 --- a/crates/weavepy-conformance/src/ecosystem.rs +++ b/crates/weavepy-conformance/src/ecosystem.rs @@ -332,6 +332,15 @@ pub struct ExpectationRow { #[derive(Debug, Default)] pub struct EcosystemExpectations { pub rows: BTreeMap, + /// RFC 0063 WS7: the OSes this baseline was *measured* on + /// (top-level `measured_os = ["macos", "linux"]`, spelled like + /// `std::env::consts::OS` — the same names the per-OS suffix keys + /// use). On a host OS not in the stamp, a `--check` run still + /// prints the full report and writes results, but unexpected rows + /// are advisory (a NOTE line, exit 0) until a measured baseline + /// for that OS lands and its name joins the stamp. `None` (no + /// stamp) means "all OSes measured" — pre-RFC-0063 behaviour. + pub measured_os: Option>, } impl EcosystemExpectations { @@ -349,6 +358,7 @@ impl EcosystemExpectations { /// spelling: `macos` / `linux` / `windows`). Split out from `load` /// so the override resolution is unit-testable per OS. fn from_body(body: &str, host_os: &str) -> Result { + let measured_os = parse_measured_os(body)?; let tables = simple_tables::parse(body, "packages").map_err(|e| anyhow::anyhow!("{e}"))?; let mut rows = BTreeMap::new(); for (name, kv) in tables { @@ -375,8 +385,92 @@ impl EcosystemExpectations { }, ); } - Ok(Self { rows }) + Ok(Self { rows, measured_os }) } + + /// RFC 0063 WS7: `true` when `host_os` has a measured baseline in + /// this file — the `measured_os` stamp names it, or the file has no + /// stamp at all (missing stamp ≡ "all OSes measured"). + pub fn os_is_measured(&self, host_os: &str) -> bool { + match &self.measured_os { + Some(stamp) => stamp.iter().any(|os| os == host_os), + None => true, + } + } +} + +/// Extract the top-level `measured_os = ["macos", "linux"]` stamp +/// (RFC 0063 WS7). Only the region *before* the first `[packages…]` +/// section header is scanned (TOML top-level keys must precede +/// sections). Single-line string arrays only — the stamp is a short +/// list of OS names, each validated against [`KNOWN_OS_SUFFIXES`] so a +/// typo is a load error rather than a silently-always-advisory gate. +fn parse_measured_os(body: &str) -> Result>> { + for (lineno, raw) in body.lines().enumerate() { + let line = simple_tables::strip_comment(raw).trim(); + if line.is_empty() { + continue; + } + if line.starts_with('[') { + break; + } + let Some((k, v)) = line.split_once('=') else { + continue; + }; + if k.trim() != "measured_os" { + continue; + } + let v = v.trim(); + if !v.starts_with('[') || !v.ends_with(']') { + anyhow::bail!( + "line {}: measured_os must be a single-line array of strings", + lineno + 1 + ); + } + let names = simple_tables::parse_list(v, lineno).map_err(|e| anyhow::anyhow!("{e}"))?; + for os in &names { + if !KNOWN_OS_SUFFIXES.contains(&os.as_str()) { + anyhow::bail!( + "unknown OS {os:?} in measured_os (expected one of: macos, linux, windows)" + ); + } + } + return Ok(Some(names)); + } + Ok(None) +} + +/// RFC 0063 WS7 — resolve the `--check` gate against the `measured_os` +/// stamp for the current host. Returns `true` when unexpected rows +/// should fail the run (measured host); on an unmeasured host it prints +/// a clearly-labelled advisory NOTE instead and returns `false`, so the +/// caller exits 0 with the full report/artifacts already written. +pub fn strict_gate_blocks( + expectations: &EcosystemExpectations, + summary: &EcosystemSummary, +) -> bool { + strict_gate_blocks_for_os(expectations, summary, std::env::consts::OS) +} + +/// Host-OS-explicit seam for [`strict_gate_blocks`], unit-testable on +/// every platform. +fn strict_gate_blocks_for_os( + expectations: &EcosystemExpectations, + summary: &EcosystemSummary, + host_os: &str, +) -> bool { + if summary.unexpected == 0 { + return false; + } + if expectations.os_is_measured(host_os) { + return true; + } + eprintln!( + "NOTE: {host_os} is not in measured_os; {} unexpected result(s) reported, \ + gate is advisory until a measured baseline lands (RFC 0063)", + summary.unexpected + ); + false } /// Resolve `_` over plain `` (RFC 0062 WS3). @@ -1486,7 +1580,7 @@ mod simple_tables { } /// Parse a balanced `[ "a", "b" ]` string-array literal. - fn parse_list(s: &str, lineno: usize) -> Result, String> { + pub(super) fn parse_list(s: &str, lineno: usize) -> Result, String> { let inner = s .trim() .strip_prefix('[') @@ -1530,7 +1624,7 @@ mod simple_tables { Ok(()) } - fn strip_comment(line: &str) -> &str { + pub(super) fn strip_comment(line: &str) -> &str { // A `#` inside a quoted string stays; the baseline dialect only // uses full-line or trailing comments outside quotes. let mut in_str = false; @@ -1825,4 +1919,114 @@ notes = "prose for humans" // not load time — an absent key stays absent here. assert_eq!(exp.rows["x"].selftest_status, None); } + + // -- measured_os stamp (RFC 0063 WS7) --------------------------------- + + #[test] + fn expectations_measured_os_stamp_parses() { + let body = r#" +# header comment +measured_os = ["macos", "linux"] + +[packages.x] +status = "pass" +"#; + let exp = EcosystemExpectations::from_body(body, "macos").unwrap(); + assert_eq!( + exp.measured_os, + Some(vec!["macos".to_owned(), "linux".to_owned()]) + ); + // Rows still parse as before. + assert_eq!(exp.rows["x"].status, RowStatus::Pass); + } + + #[test] + fn expectations_missing_stamp_means_all_measured() { + let body = "[packages.x]\nstatus = \"pass\"\n"; + let exp = EcosystemExpectations::from_body(body, "windows").unwrap(); + assert_eq!(exp.measured_os, None); + for host in ["macos", "linux", "windows"] { + assert!(exp.os_is_measured(host), "host {host}"); + } + } + + #[test] + fn expectations_stamp_resolves_per_host() { + let body = "measured_os = [\"macos\", \"linux\"]\n"; + let exp = EcosystemExpectations::from_body(body, "windows").unwrap(); + assert!(exp.os_is_measured("macos")); + assert!(exp.os_is_measured("linux")); + assert!(!exp.os_is_measured("windows")); + } + + #[test] + fn expectations_stamp_rejects_unknown_os() { + let err = + EcosystemExpectations::from_body("measured_os = [\"darwin\"]\n", "macos").unwrap_err(); + assert!(err.to_string().contains("unknown OS"), "{err}"); + } + + #[test] + fn expectations_stamp_only_read_from_top_level() { + // A `measured_os` key *inside* a section is not the stamp — it + // stays an ignored free-form row key. + let body = r#" +[packages.x] +status = "pass" +measured_os = ["macos"] +"#; + let exp = EcosystemExpectations::from_body(body, "windows").unwrap(); + assert_eq!(exp.measured_os, None); + assert!(exp.os_is_measured("windows")); + } + + // -- measured_os advisory gate (RFC 0063 WS7) -------------------------- + + fn summary_with_unexpected(n: usize) -> EcosystemSummary { + EcosystemSummary { + total: n, + passed: 0, + failed: n, + skipped: 0, + unexpected: n, + selftest_passed: 0, + selftest_failed: 0, + selftest_skipped: 0, + } + } + + #[test] + fn gate_blocks_on_measured_host_and_advises_elsewhere() { + let exp = EcosystemExpectations { + measured_os: Some(vec!["macos".to_owned(), "linux".to_owned()]), + ..EcosystemExpectations::default() + }; + assert!(strict_gate_blocks_for_os( + &exp, + &summary_with_unexpected(1), + "linux" + )); + assert!(!strict_gate_blocks_for_os( + &exp, + &summary_with_unexpected(1), + "windows" + )); + // No unexpected rows → never blocks, measured or not. + assert!(!strict_gate_blocks_for_os( + &exp, + &summary_with_unexpected(0), + "linux" + )); + } + + #[test] + fn gate_blocks_everywhere_without_stamp() { + let exp = EcosystemExpectations::default(); + for host in ["macos", "linux", "windows"] { + assert!( + strict_gate_blocks_for_os(&exp, &summary_with_unexpected(1), host), + "host {host}" + ); + } + } } diff --git a/crates/weavepy-conformance/src/regrtest.rs b/crates/weavepy-conformance/src/regrtest.rs index 3ab6ab45..e5daccb1 100644 --- a/crates/weavepy-conformance/src/regrtest.rs +++ b/crates/weavepy-conformance/src/regrtest.rs @@ -151,6 +151,17 @@ pub struct Expectations { /// Per-test wall-clock budget. Honoured only when present. #[serde(default)] pub timeout_seconds: Option, + /// RFC 0063 WS7: the OSes this baseline was *measured* on + /// (top-level `measured_os = ["macos", "linux"]`, spelled like + /// `std::env::consts::OS` — the same names the per-OS suffix keys + /// use). On a host OS not in the stamp, a `--check` run still + /// prints the full report and writes results, but unexpected + /// results are advisory (a NOTE line, exit 0) until a measured + /// baseline for that OS lands and its name joins the stamp. + /// `None` (no stamp in the file) means "all OSes measured" — + /// the pre-RFC-0063 behaviour. + #[serde(default)] + pub measured_os: Option>, } #[derive(Debug, Clone, Serialize, Deserialize)] @@ -189,6 +200,47 @@ impl Expectations { pub fn get(&self, label: &str) -> Option { self.tests.get(label).map(|e| e.status) } + + /// RFC 0063 WS7: `true` when `host_os` has a measured baseline in + /// this file — i.e. the `measured_os` stamp names it, or the file + /// carries no stamp at all (missing stamp ≡ "all OSes measured", + /// preserving pre-RFC-0063 behaviour). + pub fn os_is_measured(&self, host_os: &str) -> bool { + match &self.measured_os { + Some(stamp) => stamp.iter().any(|os| os == host_os), + None => true, + } + } +} + +/// RFC 0063 WS7 — resolve the `--check` gate against the `measured_os` +/// stamp for the current host. Returns `true` when unexpected results +/// should fail the run (measured host); on an unmeasured host it prints +/// a clearly-labelled advisory NOTE instead and returns `false`, so the +/// caller exits 0 with the full report/artifacts already written. +pub fn strict_gate_blocks(expectations: &Expectations, summary: &RegrtestSummary) -> bool { + strict_gate_blocks_for_os(expectations, summary, std::env::consts::OS) +} + +/// Host-OS-explicit seam for [`strict_gate_blocks`], unit-testable on +/// every platform. +fn strict_gate_blocks_for_os( + expectations: &Expectations, + summary: &RegrtestSummary, + host_os: &str, +) -> bool { + if summary.unexpected == 0 { + return false; + } + if expectations.os_is_measured(host_os) { + return true; + } + eprintln!( + "NOTE: {host_os} is not in measured_os; {} unexpected result(s) reported, \ + gate is advisory until a measured baseline lands (RFC 0063)", + summary.unexpected + ); + false } /// A single bundled test file scheduled for execution. @@ -1311,6 +1363,8 @@ mod simple_toml { .parse() .map_err(|_| format!("line {}: bad timeout", lineno + 1))?; top.timeout_seconds = Some(n); + } else if k == "measured_os" { + top.measured_os = Some(parse_measured_os(&v, lineno)?); } } flush(&mut top, current_section, &mut current_table, host_os)?; @@ -1392,6 +1446,49 @@ mod simple_toml { Ok(()) } + /// Parse the top-level `measured_os = ["macos", "linux"]` stamp + /// (RFC 0063 WS7). Single-line string arrays only — the stamp is a + /// short list of OS names. Names are validated against the same + /// [`OS_SUFFIXES`] set as the per-test override keys, so a typo + /// (`measured_os = ["darwin"]`) is a hard load error rather than a + /// silently-always-advisory gate. + fn parse_measured_os(v: &str, lineno: usize) -> Result, String> { + let inner = v + .trim() + .strip_prefix('[') + .and_then(|t| t.strip_suffix(']')) + .ok_or_else(|| { + format!( + "line {}: measured_os must be a single-line array of strings", + lineno + 1 + ) + })?; + let mut out = Vec::new(); + for item in inner.split(',') { + let item = item.trim(); + if item.is_empty() { + continue; + } + let name = strip_quotes(item); + if name.len() == item.len() { + return Err(format!( + "line {}: measured_os entry {item:?} must be a quoted string", + lineno + 1 + )); + } + if !OS_SUFFIXES.contains(&name) { + return Err(format!( + "line {}: unknown OS {name:?} in measured_os \ + (expected one of: {})", + lineno + 1, + OS_SUFFIXES.join(", ") + )); + } + out.push(name.to_owned()); + } + Ok(out) + } + fn parse_kv(line: &str, lineno: usize) -> Result<(String, String), String> { let eq = line .find('=') @@ -1554,6 +1651,60 @@ mod simple_toml { } } + // -- measured_os stamp (RFC 0063 WS7) --------------------------- + + #[test] + fn measured_os_stamp_parses() { + let body = "\ + measured_os = [\"macos\", \"linux\"]\n\ + timeout_seconds = 5\n\ + \n\ + [tests.\"bundled/t.py\"]\n\ + status = \"pass\"\n\ + "; + let exp = parse_for_os(body, "macos").unwrap(); + assert_eq!( + exp.measured_os, + Some(vec!["macos".to_owned(), "linux".to_owned()]) + ); + // The rest of the file still parses as before. + assert_eq!(exp.timeout_seconds, Some(5)); + assert_eq!(exp.get("bundled/t.py"), Some(TestStatus::Pass)); + } + + #[test] + fn missing_measured_os_stamp_means_all_measured() { + let body = "[tests.\"bundled/t.py\"]\nstatus = \"pass\"\n"; + let exp = parse_for_os(body, "windows").unwrap(); + assert_eq!(exp.measured_os, None); + for host in ["macos", "linux", "windows"] { + assert!(exp.os_is_measured(host), "host {host}"); + } + } + + #[test] + fn measured_os_stamp_resolves_per_host() { + let body = "measured_os = [\"macos\", \"linux\"]\n"; + let exp = parse_for_os(body, "windows").unwrap(); + assert!(exp.os_is_measured("macos")); + assert!(exp.os_is_measured("linux")); + assert!(!exp.os_is_measured("windows")); + } + + #[test] + fn measured_os_rejects_unknown_os_names() { + for bad in ["measured_os = [\"darwin\"]", "measured_os = [\"ubuntu\"]"] { + let err = parse_for_os(bad, "linux").unwrap_err(); + assert!(err.contains("unknown OS"), "{bad}: {err}"); + } + } + + #[test] + fn measured_os_rejects_non_array_values() { + let err = parse_for_os("measured_os = \"macos\"\n", "linux").unwrap_err(); + assert!(err.contains("array"), "{err}"); + } + #[test] fn bad_status_value_in_override_rejected() { let body = "\ @@ -1632,4 +1783,67 @@ mod tests { }; assert!(!r.matches_expectation()); } + + // -- measured_os advisory gate (RFC 0063 WS7) ----------------------- + + fn summary_with_unexpected(n: usize) -> RegrtestSummary { + RegrtestSummary { + total: n, + unexpected: n, + ..RegrtestSummary::default() + } + } + + #[test] + fn gate_blocks_on_measured_host() { + let exp = Expectations { + measured_os: Some(vec!["macos".to_owned(), "linux".to_owned()]), + ..Expectations::default() + }; + for host in ["macos", "linux"] { + assert!( + strict_gate_blocks_for_os(&exp, &summary_with_unexpected(2), host), + "host {host}" + ); + } + } + + #[test] + fn gate_is_advisory_on_unmeasured_host() { + let exp = Expectations { + measured_os: Some(vec!["macos".to_owned(), "linux".to_owned()]), + ..Expectations::default() + }; + assert!(!strict_gate_blocks_for_os( + &exp, + &summary_with_unexpected(2), + "windows" + )); + } + + #[test] + fn gate_blocks_everywhere_without_stamp() { + // Missing stamp ≡ "all OSes measured" — pre-RFC-0063 behaviour. + let exp = Expectations::default(); + for host in ["macos", "linux", "windows"] { + assert!( + strict_gate_blocks_for_os(&exp, &summary_with_unexpected(1), host), + "host {host}" + ); + } + } + + #[test] + fn gate_never_blocks_without_unexpected() { + let exp = Expectations { + measured_os: Some(vec!["macos".to_owned()]), + ..Expectations::default() + }; + for host in ["macos", "windows"] { + assert!( + !strict_gate_blocks_for_os(&exp, &summary_with_unexpected(0), host), + "host {host}" + ); + } + } } diff --git a/crates/weavepy-dist/src/main.rs b/crates/weavepy-dist/src/main.rs index 48a19f36..215da19f 100644 --- a/crates/weavepy-dist/src/main.rs +++ b/crates/weavepy-dist/src/main.rs @@ -7,7 +7,7 @@ //! weavepy-0.0.0+gabc1234-aarch64-apple-darwin/ //! ├── bin/ //! │ ├── weavepy # the release binary -//! │ ├── python3.13 -> weavepy # POSIX symlinks (copies on Windows) +//! │ ├── python3.13 -> weavepy # POSIX symlinks //! │ ├── python3 -> weavepy //! │ └── python -> weavepy //! ├── lib/ @@ -21,15 +21,26 @@ //! └── LICENSE-{APACHE,MIT} //! ``` //! +//! On Windows the artifact takes CPython's NT shape instead (RFC 0063 +//! WS6): `weavepy.exe` plus `python.exe`/`python3.exe`/`python3.13.exe` +//! sit at the *prefix root* as real file copies — no `bin/`, no symlinks +//! anywhere in the artifact — and the default format is `zip` (written +//! by bsdtar's `tar -a`). Headers live at `{prefix}\Include` (CPython's +//! NT shape, where sysconfig's `nt` scheme points); `lib/` is unchanged +//! and the RFC 0053 landmark walk finds `{prefix}/lib/weavepy3.13` from +//! the exe's own directory, so nothing else moves. +//! //! Rather than reimplementing the stdlib writer, `build` runs the packaged //! binary itself with `WEAVEPY_STDLIB_CACHE` pointed at a fresh directory, //! so `stdlib_tree::materialize()` writes the exact tree the binary's //! embedded sources expect — one writer, one layout, no drift — then moves -//! that tree into the staging root and adds the `bin/` shims. +//! that tree into the staging root and adds the `bin/` shims (the +//! root-level exe copies on Windows). //! //! `check` is the falsifiability half: it extracts the artifact (or builds //! one) into a scratch prefix and runs a smoke matrix through -//! `bin/python3` — the shim, deliberately — under a scrubbed environment +//! `bin/python3` (`{prefix}\python3.exe` on Windows) — the shim, +//! deliberately — under a scrubbed environment //! (no `WEAVEPYHOME`/`PYTHONHOME`/`PYTHONPATH`/`VIRTUAL_ENV`/`WEAVEPY_*`, //! and `WEAVEPY_STDLIB_CACHE` pointed at an empty decoy directory so a //! materialize fallback shows up as a check failure instead of silently @@ -42,10 +53,13 @@ //! 3. `stdlib` — spot-checks crossing native/frozen boundaries: //! sqlite3, ssl, zlib, decimal, json, hashlib. //! 4. `venv` — `python3 -m venv` then the venv python chains back to -//! the artifact prefix. +//! the artifact prefix (`venv/bin/python`; `venv\Scripts\python.exe` +//! on Windows). //! 5. `pip` — offline `pip install` in the venv (needs `--wheels`). //! 6. `cext` — compile + import a minimal C extension against the -//! shipped headers via the `sysconfig` compiler vars (unix, needs cc). +//! shipped headers via the `sysconfig` compiler vars (unix, needs cc; +//! SKIP on Windows — C builds await the python313.dll wave, RFC 0063 +//! Non-goals). //! 7. `decoy-cache` — the decoy stdlib cache stayed empty, proving every //! leg ran off the artifact tree itself. @@ -88,14 +102,14 @@ enum Cmd { out: Option, /// Artifact format. - #[arg(long, value_enum, default_value_t = Format::TarGz)] + #[arg(long, value_enum, default_value_t = Format::host_default())] format: Format, }, /// Boot an artifact on a clean scratch prefix and run the smoke matrix. Check { - /// Tarball or directory to check. When omitted, a fresh `dir` - /// artifact is built into the scratch area first. + /// Archive (tar.gz or zip) or directory to check. When omitted, + /// a fresh `dir` artifact is built into the scratch area first. #[arg(long, value_name = "PATH")] artifact: Option, @@ -120,10 +134,31 @@ enum Format { /// A gzip tarball created with the system `tar` (preserves symlinks /// and modes). TarGz, + /// A zip archive, also created with the system `tar`: `-a` makes + /// bsdtar pick the format from the `.zip` extension. GNU tar has no + /// zip writer, but zip is only the default where bsdtar *is* the + /// system tar (Windows 10+ and the GitHub runners ship it; macOS + /// too) — on GNU/Linux, `tar.gz` remains the supported archive. + Zip, /// A plain directory tree. Dir, } +impl Format { + /// The host's conventional archive format: zip on Windows (the NT + /// artifact has no symlinks to preserve and zip is what Windows + /// users unpack natively — RFC 0063 WS6), gzip tarball elsewhere. + /// The builder always packages the host target, so `cfg!(windows)` + /// is the right switch. + const fn host_default() -> Self { + if cfg!(windows) { + Format::Zip + } else { + Format::TarGz + } + } +} + fn main() -> ExitCode { match real_main() { Ok(()) => ExitCode::SUCCESS, @@ -169,6 +204,7 @@ fn resolve_workspace(explicit: Option<&Path>) -> Result { if let Some(p) = explicit { return p .canonicalize() + .map(strip_verbatim) .with_context(|| format!("--workspace path does not exist: {}", p.display())); } let compiled_from = Path::new(env!("CARGO_MANIFEST_DIR")); @@ -210,12 +246,35 @@ fn exe_name(base: &str) -> String { } } +/// `Path::canonicalize` on Windows returns `\\?\`-prefixed verbatim +/// paths. NT's verbatim syntax turns off `/`-as-separator, which breaks +/// CPython-shaped consumers: sysconfig's install schemes join with `/` +/// (`{base}/Lib/site-packages`), so `python -m venv` under a `\\?\` +/// prefix fails — on stock CPython too. Real installs never see `\\?\` +/// paths; strip the prefix so the interpreter under check is handed the +/// path shape users actually produce. No-op on non-Windows and for +/// paths (UNC shares, device paths) that have no plain spelling. +fn strip_verbatim(p: PathBuf) -> PathBuf { + if !cfg!(windows) { + return p; + } + let Some(s) = p.to_str() else { return p }; + let Some(rest) = s.strip_prefix(r"\\?\") else { + return p; + }; + // `\\?\C:\...` → `C:\...`; leave `\\?\UNC\...` and friends alone. + if rest.len() >= 3 && rest.as_bytes()[1] == b':' && rest.as_bytes()[2] == b'\\' { + return PathBuf::from(rest); + } + p +} + // --------------------------------------------------------------------------- // build // --------------------------------------------------------------------------- -/// Assemble the artifact. Returns the tarball path (`Format::TarGz`) or the -/// staging directory (`Format::Dir`). +/// Assemble the artifact. Returns the archive path (`Format::TarGz`, +/// `Format::Zip`) or the staging directory (`Format::Dir`). fn build_artifact(workspace: &Path, weavepy: &Path, out: &Path, format: Format) -> Result { let name = artifact_name(workspace); std::fs::create_dir_all(out).with_context(|| format!("failed to create {}", out.display()))?; @@ -239,6 +298,7 @@ fn build_artifact(workspace: &Path, weavepy: &Path, out: &Path, format: Format) .with_context(|| format!("failed to create {}", cache.display()))?; let cache = cache .canonicalize() + .map(strip_verbatim) .with_context(|| format!("failed to canonicalize {}", cache.display()))?; let env = scrubbed_env(&cache); @@ -261,6 +321,7 @@ fn build_artifact(workspace: &Path, weavepy: &Path, out: &Path, format: Format) let printed = String::from_utf8_lossy(&output.stdout).trim().to_owned(); let prefix = PathBuf::from(&printed) .canonicalize() + .map(strip_verbatim) .with_context(|| format!("binary printed a non-existent sys.prefix: {printed:?}"))?; if !prefix.starts_with(&cache) { bail!( @@ -278,30 +339,49 @@ fn build_artifact(workspace: &Path, weavepy: &Path, out: &Path, format: Format) std::fs::remove_dir_all(&cache) .with_context(|| format!("failed to clean up {}", cache.display()))?; - // bin/weavepy + the PEP 394-ish shim names. - let bin_dir = staging.join("bin"); - std::fs::create_dir_all(&bin_dir) - .with_context(|| format!("failed to create {}", bin_dir.display()))?; - let dest = bin_dir.join(exe_name("weavepy")); - std::fs::copy(weavepy, &dest) - .with_context(|| format!("failed to copy {} to {}", weavepy.display(), dest.display()))?; - #[cfg(unix)] - { - use std::os::unix::fs::PermissionsExt; - std::fs::set_permissions(&dest, std::fs::Permissions::from_mode(0o755)) - .with_context(|| format!("failed to chmod {}", dest.display()))?; - } - for shim in ["python3", "python", "python3.13"] { + if cfg!(windows) { + // RFC 0063 WS6 — the NT artifact is CPython-shaped at the root: + // `python.exe` and friends sit directly in the prefix (no + // `bin/`), all as real file copies — NTFS symlinks need + // privileges, so nothing in the artifact may depend on them. + // The landmark walk starts at the exe's own directory, so + // `{prefix}/lib/weavepy3.13` is found on the first probe. + for name in ["weavepy", "python", "python3", "python3.13"] { + let dest = staging.join(exe_name(name)); + std::fs::copy(weavepy, &dest).with_context(|| { + format!("failed to copy {} to {}", weavepy.display(), dest.display()) + })?; + } + } else { + // bin/weavepy + the PEP 394-ish shim names. + let bin_dir = staging.join("bin"); + std::fs::create_dir_all(&bin_dir) + .with_context(|| format!("failed to create {}", bin_dir.display()))?; + let dest = bin_dir.join(exe_name("weavepy")); + std::fs::copy(weavepy, &dest).with_context(|| { + format!("failed to copy {} to {}", weavepy.display(), dest.display()) + })?; #[cfg(unix)] { - std::os::unix::fs::symlink("weavepy", bin_dir.join(shim)) - .with_context(|| format!("failed to symlink bin/{shim}"))?; + use std::os::unix::fs::PermissionsExt; + std::fs::set_permissions(&dest, std::fs::Permissions::from_mode(0o755)) + .with_context(|| format!("failed to chmod {}", dest.display()))?; } - #[cfg(not(unix))] - { - let shim_dest = bin_dir.join(exe_name(shim)); - std::fs::copy(&dest, &shim_dest) - .with_context(|| format!("failed to copy bin shim {}", shim_dest.display()))?; + for shim in ["python3", "python", "python3.13"] { + #[cfg(unix)] + { + std::os::unix::fs::symlink("weavepy", bin_dir.join(shim)) + .with_context(|| format!("failed to symlink bin/{shim}"))?; + } + // Unreachable on Windows (the cfg!(windows) arm above owns + // that layout); kept for hypothetical non-unix, non-Windows + // hosts so the build still produces runnable shims. + #[cfg(not(unix))] + { + let shim_dest = bin_dir.join(exe_name(shim)); + std::fs::copy(&dest, &shim_dest) + .with_context(|| format!("failed to copy bin shim {}", shim_dest.display()))?; + } } } @@ -318,28 +398,49 @@ fn build_artifact(workspace: &Path, weavepy: &Path, out: &Path, format: Format) Format::Dir => Ok(staging), Format::TarGz => { let tarball = out.join(format!("{name}.tar.gz")); - if tarball.exists() { - std::fs::remove_file(&tarball) - .with_context(|| format!("failed to remove stale {}", tarball.display()))?; - } // The system tar preserves symlinks and modes; the Rust // stdlib has no tar writer and we keep this crate dep-light. - let status = std::process::Command::new("tar") - .arg("-czf") - .arg(&tarball) - .arg("-C") - .arg(out) - .arg(&name) - .status() - .context("failed to spawn `tar` — is it on PATH?")?; - if !status.success() { - bail!("`tar -czf` exited with {status}"); - } + create_archive(&tarball, &["-czf"], out, &name)?; Ok(tarball) } + Format::Zip => { + let archive = out.join(format!("{name}.zip")); + // `tar -a -cf x.zip …` — bsdtar (the system tar on Windows + // 10+, the GitHub runners, and macOS) autodetects the zip + // output format from the extension. Same dep-light story + // as TarGz: one external tool, already on PATH. + create_archive(&archive, &["-a", "-cf"], out, &name)?; + Ok(archive) + } } } +/// Create `archive` by invoking the system `tar` with `flags` (e.g. +/// `-czf` or `-a -cf`), archiving `root` relative to `dir`, replacing +/// any stale file first. +fn create_archive(archive: &Path, flags: &[&str], dir: &Path, root: &str) -> Result<()> { + if archive.exists() { + std::fs::remove_file(archive) + .with_context(|| format!("failed to remove stale {}", archive.display()))?; + } + let status = std::process::Command::new("tar") + .args(flags) + .arg(archive) + .arg("-C") + .arg(dir) + .arg(root) + .status() + .context("failed to spawn `tar` — is it on PATH?")?; + if !status.success() { + bail!( + "`tar {} {}` exited with {status}", + flags.join(" "), + archive.display() + ); + } + Ok(()) +} + /// `weavepy-{version}+g{git_short}-{target_triple}`. fn artifact_name(workspace: &Path) -> String { let version = env!("CARGO_PKG_VERSION"); @@ -373,48 +474,93 @@ fn target_triple() -> String { } fn artifact_readme(name: &str) -> String { - format!( - "# {name}\n\ - \n\ - A relocatable build of WeavePy, a Python 3.13-compatible interpreter.\n\ - \n\ - ## Usage\n\ - \n\ - Extract this directory anywhere and run the interpreter directly:\n\ - \n\ - ```sh\n\ - ./bin/python3\n\ - ```\n\ - \n\ - Optionally put it on your PATH:\n\ - \n\ - ```sh\n\ - export PATH=\"$PWD/bin:$PATH\"\n\ - ```\n\ - \n\ - `bin/weavepy` is the real binary; `python`, `python3`, and\n\ - `python3.13` are symlinks to it (copies on Windows). The layout is\n\ - self-locating — no environment variables are required.\n\ - \n\ - ## Packaging\n\ - \n\ - Virtual environments and pip work out of the box (a pip wheel is\n\ - bundled):\n\ - \n\ - ```sh\n\ - ./bin/python3 -m venv .venv\n\ - .venv/bin/python -m pip install \n\ - ```\n\ - \n\ - The CPython 3.13 C header set ships under `include/python3.13`\n\ - (what `sysconfig.get_paths()[\"include\"]` reports), so building\n\ - C extensions from source — `pip install --no-binary` of sdists —\n\ - works with a C compiler on PATH.\n\ - \n\ - ## License\n\ - \n\ - MIT OR Apache-2.0 — see `LICENSE-MIT` and `LICENSE-APACHE`.\n" - ) + // The builder always packages the host target, so the README + // describes the layout this artifact actually has — the POSIX + // `bin/` shims, or the RFC 0063 WS6 exe-at-root NT shape — and + // mentions the sibling layout only in passing. + if cfg!(windows) { + format!( + "# {name}\n\ + \n\ + A relocatable build of WeavePy, a Python 3.13-compatible interpreter.\n\ + \n\ + ## Usage\n\ + \n\ + Extract this directory anywhere and run the interpreter directly:\n\ + \n\ + ```bat\n\ + .\\python3.exe\n\ + ```\n\ + \n\ + `weavepy.exe` is the real binary; `python.exe`, `python3.exe`, and\n\ + `python3.13.exe` are copies of it at the artifact root — the CPython\n\ + Windows convention (POSIX artifacts use `bin/` symlinks instead).\n\ + The layout is self-locating — no environment variables are required.\n\ + \n\ + ## Packaging\n\ + \n\ + Virtual environments and pip work out of the box (a pip wheel is\n\ + bundled):\n\ + \n\ + ```bat\n\ + .\\python3.exe -m venv .venv\n\ + .venv\\Scripts\\python.exe -m pip install \n\ + ```\n\ + \n\ + The CPython 3.13 C header set ships under `Include\\` (the CPython\n\ + Windows convention), but building or loading C extensions on\n\ + Windows is not supported yet (it needs a `python313.dll` for\n\ + extensions to link against).\n\ + \n\ + ## License\n\ + \n\ + MIT OR Apache-2.0 — see `LICENSE-MIT` and `LICENSE-APACHE`.\n" + ) + } else { + format!( + "# {name}\n\ + \n\ + A relocatable build of WeavePy, a Python 3.13-compatible interpreter.\n\ + \n\ + ## Usage\n\ + \n\ + Extract this directory anywhere and run the interpreter directly:\n\ + \n\ + ```sh\n\ + ./bin/python3\n\ + ```\n\ + \n\ + Optionally put it on your PATH:\n\ + \n\ + ```sh\n\ + export PATH=\"$PWD/bin:$PATH\"\n\ + ```\n\ + \n\ + `bin/weavepy` is the real binary; `python`, `python3`, and\n\ + `python3.13` are symlinks to it (Windows artifacts instead place\n\ + `python.exe` and friends at the archive root). The layout is\n\ + self-locating — no environment variables are required.\n\ + \n\ + ## Packaging\n\ + \n\ + Virtual environments and pip work out of the box (a pip wheel is\n\ + bundled):\n\ + \n\ + ```sh\n\ + ./bin/python3 -m venv .venv\n\ + .venv/bin/python -m pip install \n\ + ```\n\ + \n\ + The CPython 3.13 C header set ships under `include/python3.13`\n\ + (what `sysconfig.get_paths()[\"include\"]` reports), so building\n\ + C extensions from source — `pip install --no-binary` of sdists —\n\ + works with a C compiler on PATH.\n\ + \n\ + ## License\n\ + \n\ + MIT OR Apache-2.0 — see `LICENSE-MIT` and `LICENSE-APACHE`.\n" + ) + } } /// Move each entry of `from` into `to`, preferring `fs::rename` and falling @@ -513,6 +659,7 @@ fn cmd_check( .with_context(|| format!("failed to create {}", scratch.display()))?; let scratch = scratch .canonicalize() + .map(strip_verbatim) .with_context(|| format!("failed to canonicalize {}", scratch.display()))?; let result = run_check(workspace, artifact, weavepy, wheels, &scratch); @@ -538,9 +685,10 @@ fn run_check( Some(path) => { if path.is_dir() { path.canonicalize() + .map(strip_verbatim) .with_context(|| format!("failed to canonicalize {}", path.display()))? } else if path.is_file() { - extract_tarball(&path, scratch)? + extract_archive(&path, scratch)? } else { bail!("--artifact path does not exist: {}", path.display()); } @@ -553,10 +701,19 @@ fn run_check( }; let prefix = prefix .canonicalize() + .map(strip_verbatim) .with_context(|| format!("failed to canonicalize {}", prefix.display()))?; eprintln!("checking artifact prefix {}", prefix.display()); - let python3 = prefix.join("bin").join(exe_name("python3")); + // The interpreter's place mirrors the layout `build_artifact` wrote + // for this host: `{prefix}/python3.exe` at the prefix root on + // Windows (RFC 0063 WS6 — no `bin/`), `{prefix}/bin/python3` + // elsewhere. + let python3 = if cfg!(windows) { + prefix.join(exe_name("python3")) + } else { + prefix.join("bin").join(exe_name("python3")) + }; if !python3.exists() { bail!( "artifact has no {} — not a WeavePy prefix?", @@ -594,9 +751,15 @@ fn run_check( &[], )); - // Leg 4: venv. + // Leg 4: venv. The venv's interpreter follows the platform scheme + // (`sysconfig`'s `venv` vs `nt_venv`): `bin/python` on POSIX, + // `Scripts\python.exe` on Windows. let venv_dir = scratch.join("venv"); - let venv_python = venv_dir.join("bin").join(exe_name("python")); + let venv_python = if cfg!(windows) { + venv_dir.join("Scripts").join(exe_name("python")) + } else { + venv_dir.join("bin").join(exe_name("python")) + }; let venv_leg = leg_venv(&python3, &venv_dir, &venv_python, &prefix, &env); let venv_ok = venv_leg.status == LegStatus::Pass; legs.push(venv_leg); @@ -631,7 +794,9 @@ fn run_check( Leg { name: "cext", status: LegStatus::Skip, - detail: "C-build leg is POSIX-only in this wave".to_owned(), + // A static exe has nothing for a .pyd's PE import table to + // resolve against; C builds await the python313.dll wave. + detail: "C builds are a Windows non-goal (RFC 0063)".to_owned(), } }); @@ -650,21 +815,24 @@ fn run_check( Ok(()) } -/// Extract a tarball into `/extract` and return the single -/// top-level directory inside it. -fn extract_tarball(tarball: &Path, scratch: &Path) -> Result { +/// Extract an archive into `/extract` and return the single +/// top-level directory inside it. Plain `-xf` handles both artifact +/// formats: tar sniffs gzip from the file contents, and bsdtar (the +/// system tar everywhere zip artifacts exist — see `Format::Zip`) +/// sniffs zip the same way. +fn extract_archive(archive: &Path, scratch: &Path) -> Result { let extract = scratch.join("extract"); std::fs::create_dir_all(&extract) .with_context(|| format!("failed to create {}", extract.display()))?; let status = std::process::Command::new("tar") - .arg("-xzf") - .arg(tarball) + .arg("-xf") + .arg(archive) .arg("-C") .arg(&extract) .status() .context("failed to spawn `tar` — is it on PATH?")?; if !status.success() { - bail!("`tar -xzf {}` exited with {status}", tarball.display()); + bail!("`tar -xf {}` exited with {status}", archive.display()); } let mut dirs: Vec = Vec::new(); for entry in std::fs::read_dir(&extract) @@ -679,7 +847,7 @@ fn extract_tarball(tarball: &Path, scratch: &Path) -> Result { [single] => Ok(single.clone()), other => bail!( "expected exactly one top-level directory in {}, found {}", - tarball.display(), + archive.display(), other.len() ), } @@ -752,10 +920,11 @@ fn leg_venv( name: "venv", status: LegStatus::Fail, detail: format!( - "`python3 -m venv` exited {}\n{}\n{}", + "`python3 -m venv` exited {}\n{}\n{}{}", out.status, String::from_utf8_lossy(&out.stdout), String::from_utf8_lossy(&out.stderr), + venv_failure_diagnostics(venv_python, env), ), } } @@ -776,6 +945,49 @@ fn leg_venv( ) } +/// `python -m venv` bootstraps pip through `subprocess.check_output`, +/// so the ensurepip child's traceback is captured and discarded — the +/// `CalledProcessError` venv prints carries only the exit status. When +/// creation fails and the venv interpreter was already copied in, re-run +/// the two commands the half-built venv can still answer and append +/// their output, so a CI-only failure is diagnosable from the leg +/// detail alone. +fn venv_failure_diagnostics(venv_python: &Path, env: &[(OsString, OsString)]) -> String { + if !venv_python.is_file() { + return format!( + "\n(no diagnostics: {} does not exist — venv creation failed before the interpreter copy)", + venv_python.display() + ); + } + const IDENTITY: &str = "import sys, sysconfig\n\ + print('executable:', sys.executable)\n\ + print('prefix:', sys.prefix)\n\ + print('base_prefix:', sys.base_prefix)\n\ + print('path:', sys.path)\n\ + print('purelib:', sysconfig.get_paths()['purelib'])"; + let probes: [(&str, &[&str]); 2] = [ + ("identity", &["-c", IDENTITY]), + ( + "ensurepip", + &["-m", "ensurepip", "--upgrade", "--default-pip"], + ), + ]; + let mut detail = String::new(); + for (label, args) in probes { + detail.push_str(&format!("\n--- diagnostic: venv python {label} ---\n")); + match run_captured(venv_python, args, env, None) { + Err(err) => detail.push_str(&format!("failed to spawn: {err:#}\n")), + Ok(out) => detail.push_str(&format!( + "exit: {}\nstdout:\n{}\nstderr:\n{}\n", + out.status, + String::from_utf8_lossy(&out.stdout).trim_end(), + String::from_utf8_lossy(&out.stderr).trim_end(), + )), + } + } + detail +} + fn leg_pip(venv_python: &Path, wheels: &Path, env: &[(OsString, OsString)]) -> Leg { let wheels_arg = wheels.display().to_string(); let install = run_captured( @@ -1001,8 +1213,11 @@ assert prefix == expect, f"sys.prefix={sys.prefix!r} != {expect!r}" base = os.path.realpath(sys.base_prefix) assert base == expect, f"sys.base_prefix={sys.base_prefix!r} != {expect!r}" exe_dir = os.path.realpath(os.path.dirname(sys.executable)) -assert exe_dir == os.path.join(expect, "bin"), ( - f"sys.executable={sys.executable!r} not under {expect!r}/bin" +# NT artifacts put the exe at the prefix root (RFC 0063 WS6); POSIX +# artifacts keep it under bin/. +want_exe_dir = expect if os.name == "nt" else os.path.join(expect, "bin") +assert exe_dir == want_exe_dir, ( + f"sys.executable={sys.executable!r} not in {want_exe_dir!r}" ) stdlib = os.path.realpath(sys._stdlib_dir) want_stdlib = os.path.join(expect, "lib", "weavepy3.13") diff --git a/crates/weavepy-vm/Cargo.toml b/crates/weavepy-vm/Cargo.toml index 860b2021..5c62227b 100644 --- a/crates/weavepy-vm/Cargo.toml +++ b/crates/weavepy-vm/Cargo.toml @@ -73,6 +73,11 @@ crossbeam-utils = { workspace = true } weavepy-jit = { workspace = true, optional = true } stacker = "0.1.24" +# RFC 0063 — the Windows wave: Win32 bindings for the NT-native +# stdlib core. Only present in Windows builds. +[target.'cfg(windows)'.dependencies] +windows-sys = { workspace = true } + [features] default = [] # Compile the tier-2 JIT integration (pulls in Cranelift). Off by diff --git a/crates/weavepy-vm/src/error.rs b/crates/weavepy-vm/src/error.rs index 8013b3d2..6feca9bf 100644 --- a/crates/weavepy-vm/src/error.rs +++ b/crates/weavepy-vm/src/error.rs @@ -599,6 +599,104 @@ pub fn io_error_to_py_named(err: &std::io::Error, filename: Option<&str>) -> Run io_error_to_py_named2(err, filename, None) } +/// Build a CPython-shaped `OSError` (subclassed per PEP 3151 by +/// errno) directly from its parts. This is the shared constructor for +/// paths where `std::io::Error` can't carry the truth: the Windows +/// CRT errno domain, and Win32 failures where `.winerror` must be +/// preserved alongside the errmap-translated errno (RFC 0063). +pub fn os_error_from_parts( + errno: i32, + strerror: String, + filename: Option<&str>, + filename2: Option<&str>, + winerror: Option, +) -> RuntimeError { + // Mirror `OSError.__str__`: the Windows form renders the original + // Win32 code (`[WinError 5] Access is denied: 'path'`); the POSIX + // form renders the errno. + let suffix = match (filename, filename2) { + (Some(f), Some(f2)) => format!(": '{f}' -> '{f2}'"), + (Some(f), None) => format!(": '{f}'"), + (None, _) => String::new(), + }; + let message = match winerror { + Some(w) => format!("[WinError {w}] {strerror}{suffix}"), + None => format!("[Errno {errno}] {strerror}{suffix}"), + }; + let mut runtime = oserror_for_errno(errno, message); + if let RuntimeError::PyException(ref mut exc) = runtime { + if let crate::object::Object::Instance(inst) = &exc.instance { + use crate::object::Object; + inst.slot_set("errno", Object::Int(i64::from(errno))); + inst.slot_set( + "args", + Object::new_tuple(vec![ + Object::Int(i64::from(errno)), + Object::from_str(strerror.clone()), + ]), + ); + inst.slot_set("strerror", Object::from_str(strerror)); + if let Some(w) = winerror { + inst.slot_set("winerror", Object::Int(w)); + } + if let Some(f) = filename { + inst.slot_set("filename", Object::from_str(f.to_owned())); + } + if let Some(f2) = filename2 { + inst.slot_set("filename2", Object::from_str(f2.to_owned())); + } + } + } + runtime +} + +/// The PEP 3151 `OSError`-subclass choice for an errno, using the +/// CPython-truthful cross-platform constants (`py_errno`) — on +/// Windows the socket family compares against the `WSAE*` values, +/// exactly like `Objects/exceptions.c` after its `WSAE` redefines. +fn oserror_for_errno(n: i32, message: String) -> RuntimeError { + use crate::py_errno as e; + if n == e::EISDIR { + is_a_directory_error(message) + } else if n == e::ENOTDIR { + not_a_directory_error(message) + } else if n == e::EAGAIN || n == e::EWOULDBLOCK || n == e::EINPROGRESS || n == e::EALREADY { + blocking_io_error(message) + } else if n == e::EINTR { + interrupted_error(message) + } else if n == e::ECONNREFUSED { + connection_refused_error(message) + } else if n == e::ECONNRESET { + connection_reset_error(message) + } else if n == e::ECONNABORTED { + connection_aborted_error(message) + } else if n == e::EPIPE || crate::is_eshutdown(n) { + broken_pipe_error(message) + } else if n == e::ECHILD { + child_process_error(message) + } else if n == e::EEXIST { + file_exists_error(message) + } else if n == e::ENOENT { + file_not_found_error(message) + } else if n == e::EACCES || n == eperm_value() { + permission_error(message) + } else if n == e::ETIMEDOUT { + timeout_error(message) + } else { + os_error(message) + } +} + +#[cfg(unix)] +fn eperm_value() -> i32 { + libc::EPERM +} + +#[cfg(windows)] +fn eperm_value() -> i32 { + 1 // CRT EPERM +} + /// As [`io_error_to_py_named`], but for two-path syscalls (`rename`, `link`, /// `symlink`, `replace`): populates `.filename` *and* `.filename2` and renders /// `[Errno N] strerror: 'src' -> 'dst'`, matching CPython's `OSError.__str__`. @@ -611,6 +709,21 @@ pub fn io_error_to_py_named2( AlreadyExists, BrokenPipe, ConnectionAborted, ConnectionRefused, ConnectionReset, Interrupted, NotFound, PermissionDenied, TimedOut, WouldBlock, }; + // On Windows, `raw_os_error` is a *Win32* code (`GetLastError` + // domain): translate through CPython's errmap, preserve the + // original on `.winerror`, and take strerror from + // `FormatMessageW` — the CPython-on-Windows shape (RFC 0063). + #[cfg(windows)] + if let Some(w) = err.raw_os_error() { + use crate::stdlib::nt_support; + return os_error_from_parts( + nt_support::winerror_to_errno(w), + nt_support::format_message(w), + filename, + filename2, + Some(i64::from(w)), + ); + } let errno = err.raw_os_error(); // CPython's `strerror` is the bare OS message; Rust appends a // " (os error N)" decoration we strip so the text matches CPython. diff --git a/crates/weavepy-vm/src/lib.rs b/crates/weavepy-vm/src/lib.rs index 0f9d9c77..202512b5 100644 --- a/crates/weavepy-vm/src/lib.rs +++ b/crates/weavepy-vm/src/lib.rs @@ -43,6 +43,7 @@ pub mod import; pub mod linejump; pub mod object; pub mod proc_init; +pub mod py_errno; pub mod pycache; pub mod rare_events; pub mod recursion; diff --git a/crates/weavepy-vm/src/object.rs b/crates/weavepy-vm/src/object.rs index 90ba54ef..6dd40313 100644 --- a/crates/weavepy-vm/src/object.rs +++ b/crates/weavepy-vm/src/object.rs @@ -4541,8 +4541,16 @@ impl PyFile { } #[cfg(windows)] FileBackend::Disk(f) => { - use std::os::windows::io::AsRawHandle; - Some(f.as_raw_handle() as i64) + // RFC 0063: the CRT fd model. Python-visible descriptors on + // Windows are CRT fds (CPython opens through `_wopen` and + // exposes the fd), never raw HANDLEs — `msvcrt.get_osfhandle + // (f.fileno())`, `os.fstat(f.fileno())`, and `mmap(f.fileno())` + // all consume the CRT domain. The registry mints one fd per + // handle on first use and transfers handle ownership to it; + // the close path (below) releases through the fd. + crate::stdlib::nt_support::fileno_for_disk_file(f) + .ok() + .map(i64::from) } #[cfg(not(any(unix, windows)))] FileBackend::Disk(_) => None, @@ -5524,7 +5532,26 @@ impl PyFile { return Err(std::io::Error::last_os_error()); } } - #[cfg(not(unix))] + #[cfg(windows)] + { + // RFC 0063: mirror the Unix detach-then-close discipline + // in the CRT fd model. `close_disk_file` defuses the + // `File`'s checked drop (`into_raw_handle`) and releases + // through the adopted CRT fd when `fileno()` minted one + // (the fd owns the handle), else `CloseHandle` directly. + // A stale handle/fd reports like Unix's `EBADF` instead + // of double closing. + use std::os::windows::io::IntoRawHandle; + if self.closefd.get() { + crate::stdlib::nt_support::close_disk_file(f)?; + } else { + // `closefd=False`: the caller keeps ownership; detach + // without closing (the registry entry, if any, stays + // keyed to the still-live handle). + let _ = f.into_raw_handle(); + } + } + #[cfg(not(any(unix, windows)))] { // No portable raw-fd detach here; closing is unavoidable. drop(f); @@ -6395,6 +6422,34 @@ impl Drop for PyFile { } } } + #[cfg(windows)] + { + // RFC 0063: the Windows twin of the Unix drop path above — + // detach the handle from the `File`, then release through the + // adopted CRT fd (when `fileno()` minted one) or `CloseHandle`, + // swallowing stale-descriptor errors like CPython's plain-int + // fd model does. + let Ok(mut backend) = self.backend.try_borrow_mut() else { + return; + }; + if matches!(&*backend, FileBackend::Disk(_)) { + let old = std::mem::replace( + &mut *backend, + FileBackend::MemBytes { + data: Rc::new(RefCell::new(Vec::new())), + pos: 0, + }, + ); + if let FileBackend::Disk(f) = old { + if self.closefd.get() { + let _ = crate::stdlib::nt_support::close_disk_file(f); + } else { + use std::os::windows::io::IntoRawHandle; + let _ = f.into_raw_handle(); + } + } + } + } } } diff --git a/crates/weavepy-vm/src/py_errno.rs b/crates/weavepy-vm/src/py_errno.rs new file mode 100644 index 00000000..cdf0d2a7 --- /dev/null +++ b/crates/weavepy-vm/src/py_errno.rs @@ -0,0 +1,58 @@ +//! CPython-truthful errno constants, cross-platform (RFC 0063). +//! +//! On POSIX these are the host libc values. On Windows, CPython +//! deliberately does *not* use the CRT's POSIX-flavoured socket errno +//! values (`ECONNREFUSED == 107`, …): `Modules/errnomodule.c` and +//! `Objects/exceptions.c` both prefer the Winsock `WSAE*` codes +//! (`errno.ECONNREFUSED == 10061`), and `winerror_to_errno` +//! (`PC/errmap.h`) passes the 10000–11000 Winsock range through +//! untranslated. Every place the VM dispatches an OS error to a PEP +//! 3151 `OSError` subclass must therefore compare against *these* +//! constants, not `libc::*` — on Windows the libc crate exposes the +//! CRT values, which are the wrong ones. +//! +//! File-domain errnos (`ENOENT`, `EACCES`, …) keep the CRT values on +//! Windows; those match CPython. + +#[cfg(unix)] +mod imp { + pub use libc::{ + E2BIG, EACCES, EAGAIN, EALREADY, EBADF, ECHILD, ECONNABORTED, ECONNREFUSED, ECONNRESET, + EEXIST, EINPROGRESS, EINTR, EINVAL, EISDIR, EMFILE, ENOENT, ENOEXEC, ENOMEM, ENOSPC, + ENOTDIR, ENOTEMPTY, EPIPE, ETIMEDOUT, EWOULDBLOCK, EXDEV, + }; +} + +#[cfg(windows)] +mod imp { + // CRT-domain values (match CPython-on-Windows's errno module). + pub const E2BIG: i32 = 7; + pub const EACCES: i32 = 13; + pub const EBADF: i32 = 9; + pub const ECHILD: i32 = 10; + pub const EEXIST: i32 = 17; + pub const EINTR: i32 = 4; + pub const EINVAL: i32 = 22; + pub const EISDIR: i32 = 21; + pub const EMFILE: i32 = 24; + pub const ENOENT: i32 = 2; + pub const ENOEXEC: i32 = 8; + pub const ENOMEM: i32 = 12; + pub const ENOSPC: i32 = 28; + pub const ENOTDIR: i32 = 20; + pub const ENOTEMPTY: i32 = 41; + pub const EPIPE: i32 = 32; + pub const EXDEV: i32 = 18; + // Winsock-domain values: CPython's errno module publishes the + // `WSAE*` codes under the POSIX names on Windows. + pub const EAGAIN: i32 = 11; // CRT EAGAIN (no WSA equivalent is published under this name) + pub const EWOULDBLOCK: i32 = 10035; // WSAEWOULDBLOCK + pub const EALREADY: i32 = 10037; // WSAEALREADY + pub const EINPROGRESS: i32 = 10036; // WSAEINPROGRESS + pub const ECONNABORTED: i32 = 10053; // WSAECONNABORTED + pub const ECONNREFUSED: i32 = 10061; // WSAECONNREFUSED + pub const ECONNRESET: i32 = 10054; // WSAECONNRESET + pub const ETIMEDOUT: i32 = 10060; // WSAETIMEDOUT +} + +pub use imp::*; diff --git a/crates/weavepy-vm/src/stdlib/codecs_mod.rs b/crates/weavepy-vm/src/stdlib/codecs_mod.rs index 598be607..509d156c 100644 --- a/crates/weavepy-vm/src/stdlib/codecs_mod.rs +++ b/crates/weavepy-vm/src/stdlib/codecs_mod.rs @@ -81,6 +81,19 @@ pub fn build(_cache: &ModuleCache) -> Rc { register(&mut d, "unicode_escape_encode", b_unicode_escape_encode); register(&mut d, "unicode_escape_decode", b_unicode_escape_decode); + // RFC 0063 WS6 — Windows-only code-page codecs, exactly the surface + // CPython's `_codecs` grows on win32 (`encodings/mbcs.py` and + // `encodings/oem.py` import these through `codecs`). + #[cfg(windows)] + { + register(&mut d, "code_page_encode", nt_code_page::b_code_page_encode); + register(&mut d, "code_page_decode", nt_code_page::b_code_page_decode); + register(&mut d, "mbcs_encode", nt_code_page::b_mbcs_encode); + register(&mut d, "mbcs_decode", nt_code_page::b_mbcs_decode); + register(&mut d, "oem_encode", nt_code_page::b_oem_encode); + register(&mut d, "oem_decode", nt_code_page::b_oem_decode); + } + d.insert( DictKey(Object::from_static("BOM")), Object::new_bytes(vec![0xEF, 0xBB, 0xBF]), @@ -2218,3 +2231,486 @@ fn b_unicode_escape_decode(args: &[Object]) -> Result { } Ok(Object::new_tuple(vec![obj, Object::Int(consumed as i64)])) } + +// ---------- Windows code-page codecs (RFC 0063 WS6) ---------- +// +// CPython-on-Windows exposes `_codecs.code_page_encode`/`code_page_decode` +// plus the `mbcs_*` (CP_ACP) and `oem_*` (CP_OEMCP) wrappers; the frozen +// `encodings/mbcs.py` and `encodings/oem.py` modules build their codecs on +// top of these. The conversion engine is `MultiByteToWideChar` / +// `WideCharToMultiByte`, with CPython's two-phase strategy: a strict +// whole-buffer pass first, then a per-character pass that runs the error +// handler (`Objects/unicodeobject.c` `decode_code_page_errors` / +// `encode_code_page_errors`). +#[cfg(windows)] +mod nt_code_page { + use super::{ + arg_bytes, arg_errors, arg_final, arg_text_codepoints, dec_tuple, enc_tuple, type_error, + value_error, Object, RuntimeError, + }; + use windows_sys::Win32::Foundation::{ + GetLastError, ERROR_INVALID_FLAGS, ERROR_NO_UNICODE_TRANSLATION, + }; + use windows_sys::Win32::Globalization::{ + GetOEMCP, IsDBCSLeadByteEx, MultiByteToWideChar, WideCharToMultiByte, CP_OEMCP, CP_UTF7, + CP_UTF8, MB_ERR_INVALID_CHARS, WC_NO_BEST_FIT_CHARS, + }; + + const CP_ACP: u32 = 0; + const DECODE_REASON: &str = + "No mapping for the Unicode character exists in the target code page."; + const ENCODE_REASON: &str = "invalid character"; + + /// CPython `code_page_name`: `CP_ACP` reports as `"mbcs"`, `CP_OEMCP` + /// resolves to the concrete OEM code page, everything else is `cp%u`. + fn code_page_name(cp: u32) -> String { + if cp == CP_ACP { + return "mbcs".to_owned(); + } + let cp = if cp == CP_OEMCP { + unsafe { GetOEMCP() } + } else { + cp + }; + format!("cp{cp}") + } + + /// UTF-16 units → code points (surrogate pairs combined, lone + /// surrogates preserved for the `WStr` path). + fn utf16_to_cps(w: &[u16]) -> Vec { + let mut out = Vec::with_capacity(w.len()); + let mut i = 0; + while i < w.len() { + let u = w[i]; + if (0xD800..0xDC00).contains(&u) + && i + 1 < w.len() + && (0xDC00..0xE000).contains(&w[i + 1]) + { + let cp = 0x10000 + ((u32::from(u) - 0xD800) << 10) + (u32::from(w[i + 1]) - 0xDC00); + out.push(cp); + i += 2; + } else { + out.push(u32::from(u)); + i += 1; + } + } + out + } + + /// Code points → UTF-16 units (lone surrogates pass through so the + /// per-character error path sees them and can raise/escape). + fn cps_to_utf16(cps: &[u32]) -> Vec { + let mut out = Vec::with_capacity(cps.len()); + for &cp in cps { + if cp >= 0x10000 { + let v = cp - 0x10000; + out.push(0xD800 + (v >> 10) as u16); + out.push(0xDC00 + (v & 0x3FF) as u16); + } else { + out.push(cp as u16); + } + } + out + } + + fn mb_to_wc(cp: u32, flags: u32, bytes: &[u8]) -> Result, u32> { + debug_assert!(!bytes.is_empty()); + unsafe { + let n = MultiByteToWideChar( + cp, + flags, + bytes.as_ptr(), + bytes.len() as i32, + std::ptr::null_mut(), + 0, + ); + if n <= 0 { + return Err(GetLastError()); + } + let mut buf = vec![0u16; n as usize]; + let n2 = MultiByteToWideChar( + cp, + flags, + bytes.as_ptr(), + bytes.len() as i32, + buf.as_mut_ptr(), + n, + ); + if n2 <= 0 { + return Err(GetLastError()); + } + buf.truncate(n2 as usize); + Ok(buf) + } + } + + /// One `WideCharToMultiByte` round trip; `used_default` reports whether + /// the system substituted the code page's default character (CPython's + /// "-2 → run the error handler" signal). + fn wc_to_mb(cp: u32, wide: &[u16], used_default: &mut bool) -> Result, u32> { + debug_assert!(!wide.is_empty()); + // CP_UTF7/CP_UTF8 reject WC_NO_BEST_FIT_CHARS and the default-char + // out-params (ERROR_INVALID_FLAGS); CPython special-cases them the + // same way. + let plain = cp == CP_UTF7 || cp == CP_UTF8; + unsafe { + let flags = if plain { 0 } else { WC_NO_BEST_FIT_CHARS }; + // `BOOL` out-param; windows-sys defines it as `i32`. + let mut used: i32 = 0; + let pused: *mut i32 = if plain { + std::ptr::null_mut() + } else { + &raw mut used + }; + let n = WideCharToMultiByte( + cp, + flags, + wide.as_ptr(), + wide.len() as i32, + std::ptr::null_mut(), + 0, + std::ptr::null(), + std::ptr::null_mut(), + ); + if n <= 0 { + let err = GetLastError(); + if err == ERROR_INVALID_FLAGS && !plain { + // Code page without WC_NO_BEST_FIT_CHARS support: retry + // flagless, like CPython's encode_code_page_strict. + return wc_to_mb_flagless(cp, wide); + } + return Err(err); + } + let mut buf = vec![0u8; n as usize]; + let n2 = WideCharToMultiByte( + cp, + flags, + wide.as_ptr(), + wide.len() as i32, + buf.as_mut_ptr(), + n, + std::ptr::null(), + pused, + ); + if n2 <= 0 { + return Err(GetLastError()); + } + buf.truncate(n2 as usize); + *used_default = used != 0; + Ok(buf) + } + } + + fn wc_to_mb_flagless(cp: u32, wide: &[u16]) -> Result, u32> { + unsafe { + let n = WideCharToMultiByte( + cp, + 0, + wide.as_ptr(), + wide.len() as i32, + std::ptr::null_mut(), + 0, + std::ptr::null(), + std::ptr::null_mut(), + ); + if n <= 0 { + return Err(GetLastError()); + } + let mut buf = vec![0u8; n as usize]; + let n2 = WideCharToMultiByte( + cp, + 0, + wide.as_ptr(), + wide.len() as i32, + buf.as_mut_ptr(), + n, + std::ptr::null(), + std::ptr::null_mut(), + ); + if n2 <= 0 { + return Err(GetLastError()); + } + buf.truncate(n2 as usize); + Ok(buf) + } + } + + /// CPython `decode_code_page_errors`: walk the input DBCS-sequence by + /// DBCS-sequence, running the error handler on undecodable bytes. + /// Returns `(code points, bytes consumed)` — with `final=False` an + /// incomplete trailing sequence is left unconsumed. + fn decode_errors( + cp: u32, + bytes: &[u8], + errors: &str, + final_: bool, + ) -> Result<(Vec, usize), RuntimeError> { + let name = code_page_name(cp); + let mut out: Vec = Vec::with_capacity(bytes.len()); + let mut i = 0; + while i < bytes.len() { + let insize = if unsafe { IsDBCSLeadByteEx(cp, bytes[i]) } != 0 { + 2 + } else { + 1 + }; + if i + insize > bytes.len() { + // Truncated multibyte sequence at the end of the input. + if !final_ { + break; + } + match errors { + "strict" => { + return Err(crate::error::unicode_decode_error( + &name, + bytes, + i, + bytes.len(), + DECODE_REASON, + )); + } + "ignore" => {} + "replace" => out.push(0xFFFD), + "surrogateescape" => { + for &b in &bytes[i..] { + out.push(0xDC00 + u32::from(b)); + } + } + "backslashreplace" => { + for &b in &bytes[i..] { + for c in format!("\\x{b:02x}").chars() { + out.push(c as u32); + } + } + } + _ => { + return Err(crate::error::lookup_error(format!( + "unknown error handler name '{errors}'" + ))); + } + } + i = bytes.len(); + break; + } + match mb_to_wc(cp, MB_ERR_INVALID_CHARS, &bytes[i..i + insize]) { + Ok(w) => { + out.extend(utf16_to_cps(&w)); + i += insize; + } + Err(_) => { + // CPython reports a one-byte error range and resumes + // after the failing byte. + match errors { + "strict" => { + return Err(crate::error::unicode_decode_error( + &name, + bytes, + i, + i + 1, + DECODE_REASON, + )); + } + "ignore" => {} + "replace" => out.push(0xFFFD), + "surrogateescape" => out.push(0xDC00 + u32::from(bytes[i])), + "backslashreplace" => { + for c in format!("\\x{:02x}", bytes[i]).chars() { + out.push(c as u32); + } + } + _ => { + return Err(crate::error::lookup_error(format!( + "unknown error handler name '{errors}'" + ))); + } + } + i += 1; + } + } + } + Ok((out, i)) + } + + pub(super) fn decode_impl( + cp: u32, + bytes: &[u8], + errors: &str, + final_: bool, + ) -> Result<(Object, usize), RuntimeError> { + if bytes.is_empty() { + return Ok((Object::from_static(""), 0)); + } + // Strict whole-buffer pass. `MB_ERR_INVALID_CHARS` is rejected by + // CP_UTF7 (ERROR_INVALID_FLAGS) — CPython treats UTF-7 decoding + // through its own codec, so a flagless retry is a fair fallback. + let flags = if cp == CP_UTF7 { + 0 + } else { + MB_ERR_INVALID_CHARS + }; + // An incomplete trailing DBCS sequence makes the strict pass fail + // with ERROR_NO_UNICODE_TRANSLATION, so the per-sequence path below + // handles both genuine mojibake and `final=False` truncation. + match mb_to_wc(cp, flags, bytes) { + Ok(w) => { + // The strict pass decoded everything — but with + // `final=False` a trailing lead byte must stay buffered even + // if the code page happens to also map it standalone. + if !final_ && unsafe { IsDBCSLeadByteEx(cp, bytes[bytes.len() - 1]) } != 0 { + let (cps, consumed) = decode_errors(cp, bytes, errors, final_)?; + return Ok((Object::str_from_codepoints(cps), consumed)); + } + Ok((Object::str_from_codepoints(utf16_to_cps(&w)), bytes.len())) + } + Err(e) if e == ERROR_NO_UNICODE_TRANSLATION => { + let (cps, consumed) = decode_errors(cp, bytes, errors, final_)?; + Ok((Object::str_from_codepoints(cps), consumed)) + } + Err(e) => Err(crate::stdlib::nt_support::win32_error_to_py(e as i32, None)), + } + } + + /// CPython `encode_code_page_errors`: encode character by character, + /// running the error handler wherever the code page has no mapping. + fn encode_errors(cp: u32, cps: &[u32], errors: &str) -> Result, RuntimeError> { + let name = code_page_name(cp); + let mut out: Vec = Vec::with_capacity(cps.len()); + for (pos, &cp_ch) in cps.iter().enumerate() { + let wide = cps_to_utf16(&[cp_ch]); + let is_surrogate = (0xD800..0xE000).contains(&cp_ch); + let encoded = if is_surrogate { + None + } else { + let mut used_default = false; + match wc_to_mb(cp, &wide, &mut used_default) { + Ok(b) if !used_default => Some(b), + _ => None, + } + }; + match encoded { + Some(b) => out.extend_from_slice(&b), + None => match errors { + "strict" => { + return Err(crate::error::unicode_encode_error_obj( + &name, + Object::str_from_codepoints(cps.to_vec()), + pos, + pos + 1, + ENCODE_REASON, + )); + } + "ignore" => {} + "replace" => out.push(b'?'), + "backslashreplace" => { + let esc = if cp_ch <= 0xFF { + format!("\\x{cp_ch:02x}") + } else if cp_ch <= 0xFFFF { + format!("\\u{cp_ch:04x}") + } else { + format!("\\U{cp_ch:08x}") + }; + out.extend_from_slice(esc.as_bytes()); + } + "xmlcharrefreplace" => { + out.extend_from_slice(format!("&#{cp_ch};").as_bytes()); + } + "surrogateescape" if (0xDC80..=0xDCFF).contains(&cp_ch) => { + out.push((cp_ch - 0xDC00) as u8); + } + "surrogateescape" => { + return Err(crate::error::unicode_encode_error_obj( + &name, + Object::str_from_codepoints(cps.to_vec()), + pos, + pos + 1, + ENCODE_REASON, + )); + } + _ => { + return Err(crate::error::lookup_error(format!( + "unknown error handler name '{errors}'" + ))); + } + }, + } + } + Ok(out) + } + + pub(super) fn encode_impl(cp: u32, cps: &[u32], errors: &str) -> Result, RuntimeError> { + if cps.is_empty() { + return Ok(Vec::new()); + } + // Lone surrogates can't survive the Win32 wide round trip; they must + // take the per-character path (which raises or escapes them). + let has_lone_surrogate = cps.iter().any(|&c| (0xD800..0xE000).contains(&c)); + if !has_lone_surrogate { + let wide = cps_to_utf16(cps); + let mut used_default = false; + if let Ok(b) = wc_to_mb(cp, &wide, &mut used_default) { + if !used_default { + return Ok(b); + } + } + } + encode_errors(cp, cps, errors) + } + + /// The `code_page` int argument of `code_page_encode`/`code_page_decode`. + fn arg_code_page(args: &[Object], idx: usize, name: &str) -> Result { + match args.get(idx) { + Some(Object::Int(i)) => { + u32::try_from(*i).map_err(|_| value_error(format!("invalid code page number {i}"))) + } + Some(o) => Err(type_error(format!( + "{name}() argument 'code_page' must be int, not {}", + o.type_name() + ))), + None => Err(type_error(format!("{name}() missing required argument"))), + } + } + + pub(super) fn b_code_page_encode(args: &[Object]) -> Result { + let cp = arg_code_page(args, 0, "code_page_encode")?; + let cps = arg_text_codepoints(args, 1, "code_page_encode")?; + let errors = arg_errors(args, 2); + Ok(enc_tuple(encode_impl(cp, &cps, &errors)?, cps.len())) + } + + pub(super) fn b_code_page_decode(args: &[Object]) -> Result { + let cp = arg_code_page(args, 0, "code_page_decode")?; + let bytes = arg_bytes(args, 1, "code_page_decode")?; + let errors = arg_errors(args, 2); + let final_ = arg_final(args, 3); + let (text, consumed) = decode_impl(cp, &bytes, &errors, final_)?; + Ok(dec_tuple(text, consumed)) + } + + pub(super) fn b_mbcs_encode(args: &[Object]) -> Result { + let cps = arg_text_codepoints(args, 0, "mbcs_encode")?; + let errors = arg_errors(args, 1); + Ok(enc_tuple(encode_impl(CP_ACP, &cps, &errors)?, cps.len())) + } + + pub(super) fn b_mbcs_decode(args: &[Object]) -> Result { + let bytes = arg_bytes(args, 0, "mbcs_decode")?; + let errors = arg_errors(args, 1); + let final_ = arg_final(args, 2); + let (text, consumed) = decode_impl(CP_ACP, &bytes, &errors, final_)?; + Ok(dec_tuple(text, consumed)) + } + + pub(super) fn b_oem_encode(args: &[Object]) -> Result { + let cps = arg_text_codepoints(args, 0, "oem_encode")?; + let errors = arg_errors(args, 1); + Ok(enc_tuple(encode_impl(CP_OEMCP, &cps, &errors)?, cps.len())) + } + + pub(super) fn b_oem_decode(args: &[Object]) -> Result { + let bytes = arg_bytes(args, 0, "oem_decode")?; + let errors = arg_errors(args, 1); + let final_ = arg_final(args, 2); + let (text, consumed) = decode_impl(CP_OEMCP, &bytes, &errors, final_)?; + Ok(dec_tuple(text, consumed)) + } +} diff --git a/crates/weavepy-vm/src/stdlib/ctypes_native.rs b/crates/weavepy-vm/src/stdlib/ctypes_native.rs index d312521f..8d7a1785 100644 --- a/crates/weavepy-vm/src/stdlib/ctypes_native.rs +++ b/crates/weavepy-vm/src/stdlib/ctypes_native.rs @@ -114,15 +114,23 @@ fn code_info(code: char) -> Option<(usize, usize)> { }) } -#[cfg(target_arch = "x86_64")] +#[cfg(windows)] +fn long_double_info() -> (usize, usize) { + // MSVC defines `long double` == `double` on every architecture, and + // that is the ABI of the system DLLs and of CPython on Windows + // (`sizeof(c_longdouble) == 8` there). mingw-gcc's 80-bit long double + // is a different, non-system ABI we deliberately don't model. + (8, 8) +} +#[cfg(all(not(windows), target_arch = "x86_64"))] fn long_double_info() -> (usize, usize) { (16, 16) } -#[cfg(all(target_arch = "x86", not(target_arch = "x86_64")))] +#[cfg(all(not(windows), target_arch = "x86"))] fn long_double_info() -> (usize, usize) { (12, 4) } -#[cfg(not(any(target_arch = "x86_64", target_arch = "x86")))] +#[cfg(all(not(windows), not(any(target_arch = "x86_64", target_arch = "x86"))))] fn long_double_info() -> (usize, usize) { // aarch64 (incl. Apple silicon), arm, etc.: long double == double. (8, 8) @@ -317,10 +325,15 @@ mod rtld { pub(super) const LAZY: i64 = 0; } +// The NT loader is natively wide: the `W` entry points take the path +// as-is, while the `A` variants round-trip it through the ANSI code page +// and mangle anything outside it. CPython's `load_library` (callproc.c) +// is `LoadLibraryExW`-based for the same reason. Symbol *names* stay +// ANSI — `GetProcAddress` has no wide variant. #[cfg(windows)] extern "system" { - fn LoadLibraryA(name: *const c_char) -> *mut c_void; - fn GetModuleHandleA(name: *const c_char) -> *mut c_void; + fn LoadLibraryW(name: *const u16) -> *mut c_void; + fn GetModuleHandleW(name: *const u16) -> *mut c_void; fn GetProcAddress(handle: *mut c_void, name: *const c_char) -> *mut c_void; fn FreeLibrary(handle: *mut c_void) -> i32; fn GetLastError() -> u32; @@ -343,33 +356,38 @@ fn b_dlopen(args: &[Object]) -> Result { } #[cfg(windows)] unsafe { - GetModuleHandleA(std::ptr::null()) + GetModuleHandleW(std::ptr::null()) } } Object::Str(s) => { - let cname = CString::new(s.as_bytes()) - .map_err(|_| value_error("dlopen: embedded NUL in name"))?; #[cfg(unix)] - unsafe { - libc::dlopen(cname.as_ptr(), mode) + { + let cname = CString::new(s.as_bytes()) + .map_err(|_| value_error("dlopen: embedded NUL in name"))?; + unsafe { libc::dlopen(cname.as_ptr(), mode) } } #[cfg(windows)] - unsafe { - LoadLibraryA(cname.as_ptr()) + { + let wname = super::nt_support::wide(s); + unsafe { LoadLibraryW(wname.as_ptr()) } } } // CPython accepts a bytes path and hands it to dlopen() verbatim // (no decoding) — test_dlerror exercises undecodable names. Object::Bytes(b) => { - let cname = CString::new(b.to_vec()) - .map_err(|_| value_error("dlopen: embedded NUL in name"))?; #[cfg(unix)] - unsafe { - libc::dlopen(cname.as_ptr(), mode) + { + let cname = CString::new(b.to_vec()) + .map_err(|_| value_error("dlopen: embedded NUL in name"))?; + unsafe { libc::dlopen(cname.as_ptr(), mode) } } #[cfg(windows)] - unsafe { - LoadLibraryA(cname.as_ptr()) + { + // No byte-path concept exists on NT (CPython's Windows + // `LoadLibrary` requires str); decode lossily into the + // wide API rather than reject outright. + let wname = super::nt_support::wide(&String::from_utf8_lossy(b)); + unsafe { LoadLibraryW(wname.as_ptr()) } } } other => { @@ -440,9 +458,12 @@ fn last_dlerror() -> Option { #[cfg(windows)] fn last_dlerror() -> Option { + // `FormatMessageW` text, the same strerror source the rest of the NT + // runtime uses — CPython's ctypes shows e.g. "Could not find module + // '...'" here, not a bare error number. match unsafe { GetLastError() } { 0 => None, - code => Some(format!("Win32 error {code}")), + code => Some(super::nt_support::format_message(code as i32)), } } @@ -478,6 +499,59 @@ pub(super) fn ctypes_errno_replace(new: i32) -> i32 { CTYPES_ERRNO.with(|e| e.replace(new)) } +// ---------------------------------------------------------------- +// ctypes private LastError (Windows; swapped around USE_LASTERROR calls) +// ---------------------------------------------------------------- +// +// The exactly-parallel mechanism to the private errno above: CPython +// keeps both in one per-thread array (Modules/_ctypes/callproc.c +// `_ctypes_get_errobj` — errno in `space[0]`, LastError in `space[1]`), +// and `get_last_error`/`set_last_error` read/write the *private* copy, +// never the thread's real `GetLastError()` state. + +#[cfg(windows)] +thread_local! { + static CTYPES_LAST_ERROR: Cell = const { Cell::new(0) }; +} + +#[cfg(windows)] +fn b_get_last_error(_args: &[Object]) -> Result { + Ok(Object::Int(i64::from(CTYPES_LAST_ERROR.with(|e| e.get())))) +} + +#[cfg(windows)] +fn b_set_last_error(args: &[Object]) -> Result { + // CPython parses the new value as an unsigned DWORD ("I"); negative + // Python ints arrive here two's-complement-truncated, matching that. + let new = arg_i64(args, 0)? as u32; + let old = CTYPES_LAST_ERROR.with(|e| e.replace(new)); + Ok(Object::Int(i64::from(old))) +} + +/// Atomically read-and-replace ctypes' private per-thread LastError, +/// returning the previous value. Used by the FFI bridge's `USE_LASTERROR` +/// swap (see `ffi::swap_ctypes_last_error`). +#[cfg(windows)] +pub(super) fn ctypes_last_error_replace(new: u32) -> u32 { + CTYPES_LAST_ERROR.with(|e| e.replace(new)) +} + +/// `format_error(code_or_None) -> str` — the message text for a Win32 +/// error code; with `None`, the calling thread's *real* `GetLastError()` +/// (CPython's `format_error`, callproc.c — note the asymmetry with +/// `get_last_error`, which reads the ctypes-private copy). +#[cfg(windows)] +fn b_format_error(args: &[Object]) -> Result { + let code = match args.first() { + None | Some(Object::None) => (unsafe { GetLastError() }) as i32, + Some(o) => o + .as_i64() + .ok_or_else(|| type_error("format_error: code must be an int or None"))? + as i32, + }; + Ok(Object::from_str(super::nt_support::format_message(code))) +} + // ---------------------------------------------------------------- // PEP 3118 view configuration (_ctypes `PyCData_NewGetBuffer`) // ---------------------------------------------------------------- @@ -632,6 +706,14 @@ pub fn build(_cache: &ModuleCache) -> Rc { register(&mut d, "dlerror", b_dlerror); register(&mut d, "get_errno", b_get_errno); register(&mut d, "set_errno", b_set_errno); + // The LastError trio backing the frozen `_ctypes.py`'s nt-only + // surface (FormatError / get_last_error / set_last_error). + #[cfg(windows)] + { + register(&mut d, "get_last_error", b_get_last_error); + register(&mut d, "set_last_error", b_set_last_error); + register(&mut d, "format_error", b_format_error); + } register(&mut d, "unraisable", b_unraisable); register(&mut d, "configure_view", b_configure_view); #[cfg(target_os = "macos")] diff --git a/crates/weavepy-vm/src/stdlib/ctypes_native/ffi.rs b/crates/weavepy-vm/src/stdlib/ctypes_native/ffi.rs index ffa80c8c..eb99dce3 100644 --- a/crates/weavepy-vm/src/stdlib/ctypes_native/ffi.rs +++ b/crates/weavepy-vm/src/stdlib/ctypes_native/ffi.rs @@ -14,7 +14,9 @@ //! function at `addr`. `rcode` is the return type's ctypes format code //! (or `None` for `void`); `codes[i]`/`payloads[i]` are the format code //! and already-coerced Python value for argument `i`; `flags` carries -//! the `FUNCFLAG_*` bits (only `USE_ERRNO` is honoured here). +//! the `FUNCFLAG_*` bits (`USE_ERRNO` is honoured everywhere, +//! `USE_LASTERROR` on Windows; the rest are calling-convention markers +//! that need no work on the supported ABIs — Win64 stdcall == cdecl). //! * `create_closure(callable, rcode, argcodes)` — build a C-callable //! trampoline that, when invoked from C, marshals the C arguments back //! into Python, calls `callable`, and marshals the result out. Returns @@ -38,11 +40,14 @@ //! callback direction. // On targets without a native back-end ([`native::SUPPORTED`] is false — -// e.g. Windows) the closure-marshalling half of this module is only -// reachable through the assembly trampolines that aren't compiled there, -// so it trips `dead_code` under `-D warnings`. +// e.g. aarch64-windows) the closure-marshalling half of this module is +// only reachable through the assembly trampolines that aren't compiled +// there, so it trips `dead_code` under `-D warnings`. #![cfg_attr( - not(all(unix, any(target_arch = "aarch64", target_arch = "x86_64"))), + not(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") + )), allow(dead_code) )] @@ -74,15 +79,18 @@ fn wchar_size() -> usize { } /// `long double` is platform-dependent. On AArch64/ARM it is identical to -/// `double` (8 bytes), so we can marshal it as `f64`. On x86 it is the -/// 80-bit extended type, which cannot round-trip through a Python float, -/// so we decline it (callers get a clear error). +/// `double` (8 bytes), so we can marshal it as `f64`. The same holds on +/// Windows, where MSVC (the ABI of the system DLLs and of CPython, which +/// reports `sizeof(c_longdouble) == 8` there) defines `long double` == +/// `double` on every architecture. On unix x86 it is the 80-bit extended +/// type, which cannot round-trip through a Python float, so we decline it +/// (callers get a clear error). fn classify_longdouble() -> Option { - #[cfg(any(target_arch = "aarch64", target_arch = "arm"))] + #[cfg(any(target_arch = "aarch64", target_arch = "arm", windows))] { Some(Cls::F64) } - #[cfg(not(any(target_arch = "aarch64", target_arch = "arm")))] + #[cfg(not(any(target_arch = "aarch64", target_arch = "arm", windows)))] { None } @@ -171,13 +179,22 @@ enum Slot { /// registers, so calling a true variadic like `PyBytes_FromFormat` with /// register-passed extras hands the callee garbage. Elsewhere (x86-64 /// SysV, Windows x64, Linux aarch64) variadic args use the ordinary slots. +/// +/// On Windows the Microsoft x64 convention assigns slots by *position*, +/// not by class: argument `i` (i < 4) burns register slot `i` of both +/// files at once (rcx/rdx/r8/r9 for integers, xmm0..3 for floats — an FP +/// argument in position 1 lands in xmm1 and leaves rdx dead), and the +/// 5th argument onward goes to 8-byte stack slots above the 32-byte +/// shadow space (which the call gate owns, so `Slot::Stack(0)` is still +/// the first overflow word here). fn assign_slots(classes: &[Cls], variadic_from: usize) -> Vec { let apple_arm64_variadic_stack = cfg!(all( any(target_os = "macos", target_os = "ios"), target_arch = "aarch64" )); - let mut ngrn = 0usize; // next general register number - let mut nsrn = 0usize; // next SIMD/FP register number + let win64_positional = cfg!(windows); + let mut ngrn = 0usize; // next general register number (Win64: next position) + let mut nsrn = 0usize; // next SIMD/FP register number (Win64: unused) let mut nstk = 0usize; // next stack word let mut out = Vec::with_capacity(classes.len()); for (i, &c) in classes.iter().enumerate() { @@ -186,28 +203,43 @@ fn assign_slots(classes: &[Cls], variadic_from: usize) -> Vec { nstk += 1; continue; } - let slot = match c { - Cls::F32 | Cls::F64 => { - if nsrn < native::NFPR_ARG { - let s = Slot::Fpr(nsrn); - nsrn += 1; - s - } else { - let s = Slot::Stack(nstk); - nstk += 1; - s + let slot = if win64_positional { + if ngrn < native::NGPR_ARG { + let pos = ngrn; + ngrn += 1; + match c { + Cls::F32 | Cls::F64 => Slot::Fpr(pos), + _ => Slot::Gpr(pos), } + } else { + let s = Slot::Stack(nstk); + nstk += 1; + s } - // Int / Ptr / (Void never reaches here as an argument). - _ => { - if ngrn < native::NGPR_ARG { - let s = Slot::Gpr(ngrn); - ngrn += 1; - s - } else { - let s = Slot::Stack(nstk); - nstk += 1; - s + } else { + match c { + Cls::F32 | Cls::F64 => { + if nsrn < native::NFPR_ARG { + let s = Slot::Fpr(nsrn); + nsrn += 1; + s + } else { + let s = Slot::Stack(nstk); + nstk += 1; + s + } + } + // Int / Ptr / (Void never reaches here as an argument). + _ => { + if ngrn < native::NGPR_ARG { + let s = Slot::Gpr(ngrn); + ngrn += 1; + s + } else { + let s = Slot::Stack(nstk); + nstk += 1; + s + } } } }; @@ -487,6 +519,24 @@ fn swap_ctypes_errno() { unsafe { *loc = saved }; } +// ---------------------------------------------------------------- +// ctypes private LastError swap (FUNCFLAG_USE_LASTERROR, Windows) +// ---------------------------------------------------------------- + +/// Swap the thread's real Win32 `LastError` with ctypes' private per-thread +/// copy — the exactly-parallel mechanism to [`swap_ctypes_errno`] for +/// `FUNCFLAG_USE_LASTERROR`. CPython keeps both values in one per-thread +/// array (`Modules/_ctypes/callproc.c` `_ctypes_get_errobj`: errno in +/// `space[0]`, LastError in `space[1]`) and swaps each symmetrically around +/// the foreign call. +#[cfg(windows)] +fn swap_ctypes_last_error() { + use windows_sys::Win32::Foundation::{GetLastError, SetLastError}; + let real = unsafe { GetLastError() }; + let saved = super::ctypes_last_error_replace(real); + unsafe { SetLastError(saved) }; +} + // ---------------------------------------------------------------- // call_function // ---------------------------------------------------------------- @@ -520,6 +570,14 @@ pub(super) fn b_call_function(args: &[Object]) -> Result { let flags = args.get(4).and_then(Object::as_i64).unwrap_or(0); const FUNCFLAG_USE_ERRNO: i64 = 0x8; let use_errno = (flags & FUNCFLAG_USE_ERRNO) != 0; + // FUNCFLAG_USE_LASTERROR is meaningful on Windows only (GetLastError is + // a Win32 concept); elsewhere the bit is accepted and ignored, exactly + // like CPython's non-MS_WIN32 build of `_call_function_pointer`. + #[cfg(windows)] + let use_last_error = { + const FUNCFLAG_USE_LASTERROR: i64 = 0x10; + (flags & FUNCFLAG_USE_LASTERROR) != 0 + }; let n = codes.len(); // Index of the first *variadic* argument (args past the declared @@ -564,6 +622,17 @@ pub(super) fn b_call_function(args: &[Object]) -> Result { Slot::Fpr(r) => { fpr[r] = bits; nfpr = nfpr.max(r as u64 + 1); + // Win64 varargs rule ("Varargs" in the x64 calling + // convention doc): an FP argument to a variadic or + // unprototyped function must be duplicated in the + // positionally-corresponding integer register, because the + // callee's va_arg walks the GPR home area. We don't know + // the callee's real prototype here, so always mirror — for + // a prototyped callee the shadowed GPR slot is simply dead + // (this is what libffi's win64 port does too). + if cfg!(windows) { + gpr[r] = bits; + } } Slot::Stack(_) => stack.push(bits), } @@ -573,7 +642,19 @@ pub(super) fn b_call_function(args: &[Object]) -> Result { if use_errno { swap_ctypes_errno(); } + // The LastError swap nests *inside* the errno swap, immediately + // around the call (callproc.c `_call_function_pointer`): no + // intervening code may run between the callee returning and the + // swap-out, or a stray Win32 call would clobber what it set. + #[cfg(windows)] + if use_last_error { + swap_ctypes_last_error(); + } let r = native::raw_call(addr, &gpr, &fpr, &stack, nfpr); + #[cfg(windows)] + if use_last_error { + swap_ctypes_last_error(); + } if use_errno { swap_ctypes_errno(); } diff --git a/crates/weavepy-vm/src/stdlib/ctypes_native/ffi/native.rs b/crates/weavepy-vm/src/stdlib/ctypes_native/ffi/native.rs index 897e25e6..d8e9fd45 100644 --- a/crates/weavepy-vm/src/stdlib/ctypes_native/ffi/native.rs +++ b/crates/weavepy-vm/src/stdlib/ctypes_native/ffi/native.rs @@ -20,8 +20,9 @@ //! stubs live in the normal `.text` segment there is no runtime code //! generation and therefore no W^X / `MAP_JIT` handling to worry about. //! -//! Only unix `aarch64` and `x86_64` have an ABI implementation (the x86-64 -//! gate is System V, which is not the Windows x64 convention); on any other +//! Unix `aarch64`/`x86_64` and Windows `x86_64` have an ABI implementation +//! (the unix x86-64 gate is System V; the Windows one is the Microsoft x64 +//! "Win64" convention, shared by the -gnu and -msvc targets); on any other //! target [`SUPPORTED`] is `false` and both entry points degrade cleanly //! (the frozen `_ctypes.py` treats a missing closure back-end as "callbacks //! are Python-callable only"). @@ -39,7 +40,7 @@ struct RawCall { fpr: *const u64, // +16 -> up to 8 FP registers (low 64 bits each) stack: *const u64, // +24 -> overflow stack words (may be null if 0) stack_words: u64, // +32 - nfpr: u64, // +40 -> # FP regs used (x86-64 variadic `al`) + nfpr: u64, // +40 -> # FP regs used (SysV variadic `al`; Win64 ignores it) ret_gpr: *mut u64, // +48 -> receives x0 / rax ret_fpr: *mut u64, // +56 -> receives d0 / xmm0 } @@ -88,6 +89,8 @@ impl ClosureRegs { mod abi { /// Integer/pointer argument registers: x0..x7. pub(super) const NGPR: usize = 8; + /// FP argument registers: d0..d7. + pub(super) const NFPR: usize = 8; /// Bytes between consecutive trampoline stubs (`adr`+`b` = 8 bytes). pub(super) const STUB_SIZE: usize = 8; /// `adr x17, .` yields the stub base itself, so no bias. @@ -188,6 +191,8 @@ core::arch::global_asm!( mod abi { /// Integer/pointer argument registers: rdi, rsi, rdx, rcx, r8, r9. pub(super) const NGPR: usize = 6; + /// FP argument registers: xmm0..xmm7. + pub(super) const NFPR: usize = 8; /// Bytes between consecutive trampoline stubs (padded to 16). pub(super) const STUB_SIZE: usize = 16; /// `lea r11, [rip]` yields the address *after* the 7-byte `lea`. @@ -297,30 +302,186 @@ core::arch::global_asm!( ); // ================================================================ -// Shared machinery (aarch64 + x86-64) +// x86-64 Windows (Microsoft x64, a.k.a. Win64) — Intel syntax. +// +// One convention covers both `-gnu` and `-msvc` targets (and stdcall == +// cdecl on Win64, so `FUNCFLAG_STDCALL` needs no distinct gate — see +// Modules/_ctypes/callproc.c, which compiles a single path on _WIN64). +// The asm avoids MSVC-only assembler directives (no `.seh_*` unwind +// tables, mirroring the unix gates' lack of CFI): the local verification +// toolchain is windows-gnu via zig/LLVM. // ================================================================ -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(all(windows, target_arch = "x86_64"))] +mod abi { + /// Integer/pointer argument registers: rcx, rdx, r8, r9. Win64 argument + /// slots are *positional* — argument `i` (i < 4) consumes slot `i` of + /// both files at once, whatever its class (`assign_slots` enforces + /// this) — so NGPR == NFPR == 4. + pub(super) const NGPR: usize = 4; + /// FP argument registers: xmm0..xmm3 (positional, see above). + pub(super) const NFPR: usize = 4; + /// Bytes between consecutive trampoline stubs (padded to 16). + pub(super) const STUB_SIZE: usize = 16; + /// `lea r11, [rip]` yields the address *after* the 7-byte `lea`. + pub(super) const LEA_BIAS: usize = 7; +} + +#[cfg(all(windows, target_arch = "x86_64"))] +core::arch::global_asm!( + ".p2align 4", + ".globl {gate}", + "{gate}:", + " push rbp", + " mov rbp, rsp", + " push rbx", + " push r12", + " mov rbx, rcx", // rbx = &RawCall (Win64: first arg in rcx) + " mov r12, [rbx+32]", // stack_words + // Overflow area + the 32-byte shadow space the Win64 ABI makes the + // caller allocate on *every* call, then round so rsp stays 16-byte + // aligned at the `call` (entry rsp ≡ 8 mod 16; the three pushes + // above restore 16-alignment). + " lea rax, [r12*8 + 32]", + " add rax, 15", + " and rax, -16", + " sub rsp, rax", + // Stack arguments (the 5th onward) live in 8-byte slots immediately + // above the shadow space: [rsp+32], [rsp+40], ... + " mov r10, [rbx+24]", // stack src + " xor r11, r11", + "3:", + " cmp r11, r12", + " jae 4f", + " mov rax, [r10 + r11*8]", + " mov [rsp + 32 + r11*8], rax", + " add r11, 1", + " jmp 3b", + "4:", + " mov rax, [rbx+16]", // fpr src (only 4 argument XMM regs on Win64) + " movsd xmm0, [rax+0]", + " movsd xmm1, [rax+8]", + " movsd xmm2, [rax+16]", + " movsd xmm3, [rax+24]", + " mov r10, [rbx+8]", // gpr src + " mov rcx, [r10+0]", + " mov rdx, [r10+8]", + " mov r8, [r10+16]", + " mov r9, [r10+24]", + // No `al` FP count here: that is SysV varargs protocol. Win64 varargs + // instead need FP args mirrored into the GPR file, which the slot + // assigner does before we ever get here (see ffi.rs `assign_slots`). + " mov r11, [rbx+0]", // fnptr + " call r11", + " mov r10, [rbx+48]", // ret_gpr (integer/pointer result: rax) + " mov [r10], rax", + " mov r10, [rbx+56]", // ret_fpr (float/double result: xmm0) + " movsd [r10], xmm0", + " lea rsp, [rbp-16]", + " pop r12", + " pop rbx", + " pop rbp", + " ret", + gate = sym wp_ffi_call_gate, +); + +#[cfg(all(windows, target_arch = "x86_64"))] +core::arch::global_asm!( + ".p2align 4", + ".globl {pool}", + "{pool}:", + ".rept {n}", + " .p2align 4", // fixed 16-byte stub stride regardless of jmp encoding + " lea r11, [rip]", // r11 = stub base + 7 + " jmp 9f", + ".endr", + ".p2align 4", + "9:", + // Incoming frame: [rsp] = return address, [rsp+8..40) = the 32-byte + // shadow (register-home) space our caller allocated, stack args from + // [rsp+40]. After `push rbp` those become rbp+8 / rbp+16..48 / rbp+48. + " push rbp", + " mov rbp, rsp", + " sub rsp, 96", + // Home the integer argument registers into the caller's shadow space + // (that is exactly what the ABI reserves it for), giving a contiguous + // gpr image at rbp+16. + " mov [rbp+16], rcx", + " mov [rbp+24], rdx", + " mov [rbp+32], r8", + " mov [rbp+40], r9", + " movsd [rsp+48], xmm0", // spill FP args into locals + " movsd [rsp+56], xmm1", + " movsd [rsp+64], xmm2", + " movsd [rsp+72], xmm3", + // wp_cl_dispatch takes six arguments; on Win64 the 5th and 6th go in + // the two stack slots above our own outgoing shadow space + // ([rsp+0..32) belongs to the dispatch call). + " mov rcx, r11", // stub_addr + " lea rdx, [rbp+16]", // gpr + " lea r8, [rsp+48]", // fpr + " lea r9, [rbp+48]", // incoming stack args + " lea rax, [rsp+80]", // ret_gpr + " mov [rsp+32], rax", + " lea rax, [rsp+88]", // ret_fpr + " mov [rsp+40], rax", + " call {dispatch}", + " mov rax, [rsp+80]", + " movsd xmm0, [rsp+88]", + " mov rsp, rbp", + " pop rbp", + " ret", + pool = sym wp_cl_pool, + dispatch = sym wp_cl_dispatch, + n = const POOL_SIZE, +); + +// ================================================================ +// Shared machinery (unix aarch64 / x86-64 + windows x86-64) +// ================================================================ + +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] use core::sync::atomic::{AtomicPtr, Ordering}; -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] use std::sync::Mutex; /// Number of pre-allocated closure trampolines. ctypes callbacks are few in /// practice; freed slots are recycled ([`free_trampoline`]) so this bounds /// *live* callbacks, not total ever created. -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] pub(super) const POOL_SIZE: usize = 1024; -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] pub(super) const NGPR_ARG: usize = abi::NGPR; -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] -pub(super) const NFPR_ARG: usize = 8; -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] +pub(super) const NFPR_ARG: usize = abi::NFPR; +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] pub(super) const SUPPORTED: bool = true; // Defined by the `global_asm!` blocks above (their `sym` operands resolve // these names in this module's scope). -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] extern "C" { fn wp_ffi_call_gate(call: *const RawCall); fn wp_cl_pool(); @@ -328,14 +489,17 @@ extern "C" { /// Execute a real C ABI call. `gpr`/`fpr` hold the integer and FP register /// files (only the ABI-relevant prefix is consumed); `stack` holds any -/// overflow words; `nfpr` is the FP-register count for x86-64 variadic -/// calls. Returns `(x0/rax, d0/xmm0)`. +/// overflow words; `nfpr` is the FP-register count for SysV x86-64 variadic +/// calls (the Win64 gate ignores it). Returns `(x0/rax, d0/xmm0)`. /// /// # Safety /// `fnptr` must be a valid function whose real C signature matches the /// register/stack placement the caller performed; pointer arguments must /// outlive the call. -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] pub(super) unsafe fn raw_call( fnptr: usize, gpr: &[u64; 8], @@ -365,29 +529,44 @@ pub(super) unsafe fn raw_call( /// Per-slot user-data pointers (leaked `ClosureData`), read lock-free by the /// trampoline dispatch path. -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] static SLOT_DATA: [AtomicPtr; POOL_SIZE] = [const { AtomicPtr::new(std::ptr::null_mut()) }; POOL_SIZE]; -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] struct AllocState { next: usize, free: Vec, } -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] static ALLOC: Mutex = Mutex::new(AllocState { next: 0, free: Vec::new(), }); -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] fn pool_base() -> usize { wp_cl_pool as *const () as usize } /// Bind `userdata` to a free trampoline slot and return its C-callable code /// address, or `None` if the pool is exhausted. -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] pub(super) fn alloc_trampoline(userdata: *mut c_void) -> Option { let slot = { let mut st = ALLOC.lock().unwrap(); @@ -408,7 +587,10 @@ pub(super) fn alloc_trampoline(userdata: *mut c_void) -> Option { /// Release the trampoline at `code_addr`, returning the `userdata` pointer /// previously bound (so the caller can reclaim it). Returns `None` if the /// address is not a live trampoline in this pool. -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] pub(super) fn free_trampoline(code_addr: usize) -> Option<*mut c_void> { let base = pool_base(); if code_addr < base { @@ -433,7 +615,10 @@ pub(super) fn free_trampoline(code_addr: usize) -> Option<*mut c_void> { /// Trampoline dispatch entry (called from the shared spill routine). Recovers /// the slot from the stub's self-reported address, loads the bound /// `ClosureData`, and hands the register-file image to the Rust marshaller. -#[cfg(all(unix, any(target_arch = "aarch64", target_arch = "x86_64")))] +#[cfg(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +))] extern "C" fn wp_cl_dispatch( stub_addr: usize, gpr: *const u64, @@ -463,16 +648,28 @@ extern "C" fn wp_cl_dispatch( // Unsupported architectures: clean, no-asm fallbacks. // ================================================================ -#[cfg(not(all(unix, any(target_arch = "aarch64", target_arch = "x86_64"))))] +#[cfg(not(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +)))] pub(super) const NGPR_ARG: usize = 8; -#[cfg(not(all(unix, any(target_arch = "aarch64", target_arch = "x86_64"))))] +#[cfg(not(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +)))] pub(super) const NFPR_ARG: usize = 8; -#[cfg(not(all(unix, any(target_arch = "aarch64", target_arch = "x86_64"))))] +#[cfg(not(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +)))] pub(super) const SUPPORTED: bool = false; /// # Safety /// Never called: [`SUPPORTED`] is `false`, so every call site is guarded. -#[cfg(not(all(unix, any(target_arch = "aarch64", target_arch = "x86_64"))))] +#[cfg(not(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +)))] pub(super) unsafe fn raw_call( _fnptr: usize, _gpr: &[u64; 8], @@ -483,12 +680,18 @@ pub(super) unsafe fn raw_call( (0, 0) } -#[cfg(not(all(unix, any(target_arch = "aarch64", target_arch = "x86_64"))))] +#[cfg(not(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +)))] pub(super) fn alloc_trampoline(_userdata: *mut c_void) -> Option { None } -#[cfg(not(all(unix, any(target_arch = "aarch64", target_arch = "x86_64"))))] +#[cfg(not(any( + all(unix, any(target_arch = "aarch64", target_arch = "x86_64")), + all(windows, target_arch = "x86_64") +)))] pub(super) fn free_trampoline(_code_addr: usize) -> Option<*mut c_void> { None } diff --git a/crates/weavepy-vm/src/stdlib/io_full.rs b/crates/weavepy-vm/src/stdlib/io_full.rs index 26350f44..eb25ddb3 100644 --- a/crates/weavepy-vm/src/stdlib/io_full.rs +++ b/crates/weavepy-vm/src/stdlib/io_full.rs @@ -401,7 +401,28 @@ fn file_from_fd(fd_obj: &Object, mode: &str, name: String) -> Result RuntimeError { RuntimeError::PyException(crate::error::PyException::from_builtin( "SystemError", @@ -267,7 +268,7 @@ pub struct MmapRegion { /// Windows keeps the `memmap2` mapping alive here; Unix owns a raw /// region released in `Drop`. #[cfg(windows)] - _win_backing: Option, + win_backing: Option, } #[cfg(windows)] @@ -344,9 +345,10 @@ struct MmapState { access: i64, /// File offset the mapping starts at (repr / resize / size). offset: i64, - /// The dup'ed file descriptor (`-1` for anonymous or `trackfd=False`). - /// Only the unix `size`/`resize` paths read it back. - #[cfg_attr(windows, allow(dead_code))] + /// The file descriptor (`-1` for anonymous or `trackfd=False`). + /// On unix it is a dup the mapping owns (closed by `mm_close`); on + /// Windows it is the caller's CRT fd, held non-owning so `size()` + /// can re-derive a metadata view (RFC 0063 fd model). fd: i32, /// The `mmap(2)` flags actually used (only the Linux `resize` path /// consults it, for the shared-anonymous-grow guard). @@ -652,31 +654,74 @@ fn mm_new(args: &[Object], kwargs: &[(String, Object)]) -> Result coerce_index_i64(o)?, None => ACCESS_DEFAULT, }; + let offset = match &slots[4] { + Some(o) => coerce_index_i64(o)?, + None => 0, + }; if !(ACCESS_DEFAULT..=ACCESS_COPY).contains(&access) { return Err(value_error("mmap invalid access parameter.")); } + if offset < 0 { + return Err(overflow_error("memory mapped offset must be positive")); + } + if offset != 0 { + // CPython maps at any allocation-granularity offset via + // CreateFileMapping/MapViewOfFile; deferred (RFC 0063). + return Err(crate::error::os_error( + "mmap: non-zero offset is not supported on Windows in WeavePy yet (RFC 0063)", + )); + } let _ = trackfd; - let backing = if fileno == -1 { + let fd = fileno as i32; + let mut map_size = map_size; + let backing = if fd == -1 { let map = memmap2::MmapMut::map_anon(map_size as usize) .map_err(|e| crate::error::os_error(format!("mmap_anon: {e}")))?; WinBacking::Write(map) } else { - let file = file_from_fileno(fileno); - let file_ref = std::mem::ManuallyDrop::new(file); - if access == ACCESS_READ { - let map = unsafe { memmap2::Mmap::map(&*file_ref) } - .map_err(|e| crate::error::os_error(format!("mmap: {e}")))?; - WinBacking::Read(map) - } else { - let map = unsafe { memmap2::MmapMut::map_mut(&*file_ref) } - .map_err(|e| crate::error::os_error(format!("mmap: {e}")))?; - WinBacking::Write(map) + // RFC 0063 fd model: the Python-visible integer is a CRT fd, + // not a HANDLE (CPython's mmapmodule.c bridges through + // `_get_osfhandle` the same way). `file_view_from_fd` hands + // back a non-owning `ManuallyDrop` view — the fd stays + // the handle's sole owner, and the view is never dropped as + // an owner, so no double close can occur. The view only has + // to outlive the map*() calls themselves: CreateFileMapping + // takes its own reference on the file handle, so the + // resulting mapping stays valid independently of the fd. + let file = crate::stdlib::nt_support::file_view_from_fd(fd) + .map_err(|e| crate::error::io_error_to_py(&e))?; + // CPython's `new_mmap_object` length rules: length 0 means + // "the whole file" (empty files rejected). A length past + // EOF — which CPython satisfies by growing the file — is + // deferred along with `resize` (RFC 0063). + let file_len = file + .metadata() + .map_err(|e| crate::error::io_error_to_py(&e))? + .len(); + if map_size == 0 { + if file_len == 0 { + return Err(value_error("cannot mmap an empty file")); + } + map_size = file_len as i64; + } else if map_size as u64 > file_len { + return Err(value_error("mmap length is greater than file size")); + } + let mut opts = memmap2::MmapOptions::new(); + opts.len(map_size as usize); + let os_err = |e: std::io::Error| crate::error::io_error_to_py(&e); + match access { + ACCESS_READ => WinBacking::Read(unsafe { opts.map(&*file) }.map_err(os_err)?), + // Copy-on-write, like the unix MAP_PRIVATE arm: writes + // stay in the private copy, never reach the file. + ACCESS_COPY => WinBacking::Write(unsafe { opts.map_copy(&*file) }.map_err(os_err)?), + _ => WinBacking::Write(unsafe { opts.map_mut(&*file) }.map_err(os_err)?), } }; let (ptr, len) = match &backing { @@ -687,16 +732,19 @@ fn mm_new(args: &[Object], kwargs: &[(String, Object)]) -> Result Result std::fs::File { - use std::os::windows::io::{FromRawHandle, RawHandle}; - // On Windows the integer passed in is the underlying OS HANDLE - // (as produced by `msvcrt._get_osfhandle(fd)` on the Python side). - // SAFETY: caller must pass a live handle; `ManuallyDrop` keeps it - // alive past this function. - unsafe { std::fs::File::from_raw_handle(fileno as isize as RawHandle) } -} - // --------------------------------------------------------------------------- // I/O methods // --------------------------------------------------------------------------- @@ -904,6 +942,19 @@ fn mm_size(args: &[Object]) -> Result { } #[cfg(windows)] { + // CPython's `mmap_size_method` Windows arm: file-backed maps + // report the live *file* size (GetFileSizeEx on the backing + // handle — Modules/mmapmodule.c); anonymous maps report the + // region length. The metadata view is non-owning (RFC 0063 fd + // model), so a stale fd surfaces as EBADF, like unix's fstat(-1). + if st.fd >= 0 { + let view = crate::stdlib::nt_support::file_view_from_fd(st.fd) + .map_err(|e| crate::error::io_error_to_py(&e))?; + let meta = view + .metadata() + .map_err(|e| crate::error::io_error_to_py(&e))?; + return Ok(Object::Int(meta.len() as i64)); + } Ok(Object::Int(st.region.byte_len() as i64)) } } @@ -944,6 +995,18 @@ fn mm_flush(args: &[Object]) -> Result { return Err(errno_error()); } } + #[cfg(windows)] + { + // memmap2's flush is exactly CPython's `mmap_flush_method` pair: + // FlushViewOfFile on the requested range, then FlushFileBuffers + // on the backing handle (Modules/mmapmodule.c). Read-only and + // copy-on-write maps already returned above, so the remaining + // backing is the shared-writable mapping. + if let Some(WinBacking::Write(map)) = &st.region.win_backing { + map.flush_range(offset as usize, size as usize) + .map_err(|e| crate::error::io_error_to_py(&e))?; + } + } Ok(Object::None) } @@ -1236,7 +1299,22 @@ fn mm_resize(args: &[Object]) -> Result { st.region.len.store(new_size as usize, Ordering::Relaxed); Ok(Object::None) } - #[cfg(not(target_os = "linux"))] + #[cfg(windows)] + { + let _ = new_size; + drop(st); + // CPython resizes Windows maps for real (UnmapViewOfFile + + // SetFilePointer/SetEndOfFile + a fresh CreateFileMapping — + // Modules/mmapmodule.c `mmap_resize_method`); WeavePy's + // memmap2-backed map can't remap in place, so full support is + // deferred (RFC 0063 "mmap residuals"). OSError — not the + // no-mremap SystemError — so callers see a catchable, + // documented failure rather than an internal-error shape. + Err(crate::error::os_error( + "mmap: resizing is not supported on Windows in WeavePy yet (RFC 0063)", + )) + } + #[cfg(not(any(target_os = "linux", windows)))] { let _ = new_size; drop(st); diff --git a/crates/weavepy-vm/src/stdlib/mod.rs b/crates/weavepy-vm/src/stdlib/mod.rs index 791c3e01..0fb1fc3f 100644 --- a/crates/weavepy-vm/src/stdlib/mod.rs +++ b/crates/weavepy-vm/src/stdlib/mod.rs @@ -28,6 +28,7 @@ pub mod csv_mod; pub mod datetime_mod; pub mod errno_mod; pub mod faulthandler_mod; +#[cfg(unix)] pub mod fcntl_mod; pub mod functools_mod; pub mod gc_mod; @@ -43,9 +44,19 @@ pub mod json_accel; pub mod lzma_mod; pub mod marshal_mod; pub mod math; +// RFC 0063 — the Windows wave: shared NT plumbing (CRT fd layer, +// winerror bridge) plus the native module quartet the frozen Windows +// stdlib consumes. +#[cfg(windows)] +pub mod msvcrt_mod; +#[cfg(windows)] +pub(crate) mod nt_support; pub mod operator_accel; pub mod os; pub mod os_process; +#[cfg(windows)] +pub mod overlapped_mod; +#[cfg(unix)] pub mod posixsubprocess_mod; pub mod pyexpat_mod; #[cfg(unix)] @@ -77,6 +88,10 @@ pub mod ucd; pub mod unicodedata_mod; pub mod weakref_mod; pub mod weave_frame_mod; +#[cfg(windows)] +pub mod winapi_mod; +#[cfg(windows)] +pub mod winreg_mod; pub mod zlib_mod; // RFC 0023 — drop-in stdlib parity. pub mod abc_mod; @@ -149,8 +164,22 @@ pub fn register_all(cache: &ModuleCache) { cache.register_builtin("_socket", socket_mod::build); cache.register_builtin("_subprocess", subprocess_mod::build); // RFC 0040 WS2 — the CPython-faithful fork+exec primitive behind the - // verbatim `subprocess.Popen` driver. + // verbatim `subprocess.Popen` driver. POSIX-only, like CPython: on + // Windows `import _posixsubprocess` must fail so portable code + // (and the frozen `subprocess.py`) takes the `_winapi` arm + // (RFC 0063 truthful-inventory rule). + #[cfg(unix)] cache.register_builtin("_posixsubprocess", posixsubprocess_mod::build); + // RFC 0063 — the Windows-native quartet the frozen Windows stdlib + // (subprocess, multiprocessing, shutil, asyncio.windows_events, + // platform, mimetypes) imports. Windows-only, like CPython. + #[cfg(windows)] + { + cache.register_builtin("_winapi", winapi_mod::build); + cache.register_builtin("msvcrt", msvcrt_mod::build); + cache.register_builtin("winreg", winreg_mod::build); + cache.register_builtin("_overlapped", overlapped_mod::build); + } cache.register_builtin("hashlib", hashlib_mod::build); // RFC 0060 WS3 — CPython-shaped hash accelerator modules, importable // individually and consulted by `hashlib.__get_builtin_constructor`. @@ -208,7 +237,10 @@ pub fn register_all(cache: &ModuleCache) { // `xmlrpc` serializer the `multiprocessing.managers` server process uses. cache.register_builtin("pyexpat", pyexpat_mod::build); // RFC 0040 (WS5): shm_open/shm_unlink core for `multiprocessing`'s - // resource_tracker + shared_memory. + // resource_tracker + shared_memory. POSIX-only, like CPython: the + // frozen `shared_memory.py` selects its NT arm off the + // ImportError (RFC 0063). + #[cfg(unix)] cache.register_builtin("_posixshmem", multiprocessing_mod::build_posixshmem); // RFC 0041 WS-datetime: `datetime` is now CPython's verbatim shim over the // bundled pure-Python `_pydatetime`. The old constants-only native @@ -238,7 +270,11 @@ pub fn register_all(cache: &ModuleCache) { cache.register_builtin("atexit", atexit_mod::build); cache.register_builtin("_https", https_mod::build); // RFC 0026 — POSIX-flavoured stdlib that user code (and the - // multiprocessing rewrite) imports unconditionally. + // multiprocessing rewrite) imports unconditionally. POSIX-only + // since RFC 0063: CPython has no `fcntl` on Windows and portable + // code keys off the ImportError; the old always-registered stub + // module sent it down the wrong branch. + #[cfg(unix)] cache.register_builtin("fcntl", fcntl_mod::build); // CPython has no `resource` module on Windows — every stdlib caller // guards `import resource` with ImportError — and the non-unix stubs @@ -1502,6 +1538,20 @@ pub(crate) fn frozen_sources() -> &'static [FrozenSource] { source: include_str!("python/encodings/undefined.py"), is_package: false, }, + // RFC 0063 — the ANSI/OEM code-page codecs. CPython ships these + // unconditionally; on non-Windows the `from codecs import + // mbcs_encode …` line raises ImportError and `codecs.lookup` + // treats the module as a miss (exactly CPython's behaviour). + FrozenSource { + name: "encodings.mbcs", + source: include_str!("python/encodings/mbcs.py"), + is_package: false, + }, + FrozenSource { + name: "encodings.oem", + source: include_str!("python/encodings/oem.py"), + is_package: false, + }, FrozenSource { name: "encodings.base64_codec", source: include_str!("python/encodings/base64_codec.py"), @@ -3217,6 +3267,13 @@ pub(crate) fn frozen_sources() -> &'static [FrozenSource] { source: include_str!("python/ntpath_mod.py"), is_package: false, }, + // On Windows `urllib.request` does `from nturl2path import …` at + // module scope, so pip cannot even import without it (RFC 0063). + FrozenSource { + name: "nturl2path", + source: include_str!("python/nturl2path.py"), + is_package: false, + }, FrozenSource { name: "textwrap", source: include_str!("python/textwrap_mod.py"), diff --git a/crates/weavepy-vm/src/stdlib/msvcrt_mod.rs b/crates/weavepy-vm/src/stdlib/msvcrt_mod.rs new file mode 100644 index 00000000..64c3c7cb --- /dev/null +++ b/crates/weavepy-vm/src/stdlib/msvcrt_mod.rs @@ -0,0 +1,306 @@ +//! The `msvcrt` built-in module (RFC 0063 WS2). +//! +//! Transcribes CPython's `PC/msvcrtmodule.c`: the CRT fd↔HANDLE bridge +//! (`get_osfhandle`/`open_osfhandle`), text/binary `setmode`, region +//! `locking` (+ the `LK_*` modes), the conio console family (`kbhit`, +//! `getch`/`getwch`/`getche`/`getwche`, `putch`/`putwch`, +//! `ungetch`/`ungetwch`), `heapmin`, and the Win32 error-mode pair +//! (`SetErrorMode`/`GetErrorMode` + `SEM_*`). +//! +//! Error domains follow CPython exactly: the CRT functions raise the +//! errno-shaped `OSError` (`PyErr_SetFromErrno` ↔ +//! [`nt_support::last_crt_error_to_py`]); the error-mode functions live +//! in the Win32 domain and cannot fail. All CRT externs come from +//! [`nt_support::crt`] — the single audited UCRT import block. + +use crate::sync::Rc; +use crate::sync::RefCell; + +use crate::error::{type_error, RuntimeError}; +use crate::import::ModuleCache; +use crate::object::{DictData, DictKey, Object, PyModule}; +use crate::stdlib::nt_support::{self, crt}; +use crate::stdlib::os::builtin; + +pub fn build(_cache: &ModuleCache) -> Rc { + let dict = Rc::new(RefCell::new(DictData::default())); + { + let mut d = dict.borrow_mut(); + d.insert( + DictKey(Object::from_static("__name__")), + Object::from_static("msvcrt"), + ); + d.insert( + DictKey(Object::from_static("__doc__")), + Object::from_static("Functions from the msvcrt library on Windows platforms."), + ); + + for (name, body) in [ + ("heapmin", msvcrt_heapmin as fn(&[Object]) -> _), + ("locking", msvcrt_locking), + ("setmode", msvcrt_setmode), + ("open_osfhandle", msvcrt_open_osfhandle), + ("get_osfhandle", msvcrt_get_osfhandle), + ("kbhit", msvcrt_kbhit), + ("getch", msvcrt_getch), + ("getwch", msvcrt_getwch), + ("getche", msvcrt_getche), + ("getwche", msvcrt_getwche), + ("putch", msvcrt_putch), + ("putwch", msvcrt_putwch), + ("ungetch", msvcrt_ungetch), + ("ungetwch", msvcrt_ungetwch), + ("SetErrorMode", msvcrt_set_error_mode), + ("GetErrorMode", msvcrt_get_error_mode), + ("CrtSetReportMode", msvcrt_crt_set_report_mode), + ("CrtSetReportFile", msvcrt_crt_set_report_file), + ] { + d.insert(DictKey(Object::from_static(name)), builtin(name, body)); + } + + // `_locking` modes (`sys/locking.h`) — the values already live in + // the audited CRT block. + for (name, val) in [ + ("LK_LOCK", crt::LK_LOCK), + ("LK_NBLCK", crt::LK_NBLCK), + ("LK_NBRLCK", crt::LK_NBRLCK), + ("LK_RLCK", crt::LK_RLCK), + ("LK_UNLCK", crt::LK_UNLCK), + ] { + d.insert( + DictKey(Object::from_static(name)), + Object::Int(i64::from(val)), + ); + } + + // `SetErrorMode` flags (winbase.h). + for (name, val) in [ + ("SEM_FAILCRITICALERRORS", 0x0001_i64), + ("SEM_NOGPFAULTERRORBOX", 0x0002), + ("SEM_NOALIGNMENTFAULTEXCEPT", 0x0004), + ("SEM_NOOPENFILEERRORBOX", 0x8000), + ] { + d.insert(DictKey(Object::from_static(name)), Object::Int(val)); + } + + // CRT debug-report streams (crtdbg.h). CPython publishes the + // values unconditionally even though the report *functions* only + // exist in debug CRTs. + d.insert(DictKey(Object::from_static("_CRT_WARN")), Object::Int(0)); + d.insert(DictKey(Object::from_static("_CRT_ERROR")), Object::Int(1)); + d.insert(DictKey(Object::from_static("_CRT_ASSERT")), Object::Int(2)); + + // CPython bakes in the _VC_CRT_*_VERSION macros of the compiling + // toolchain; WeavePy links the UCRT whose stable binding version + // is the VS2015+ "14.0" ABI, so publish that. + d.insert( + DictKey(Object::from_static("CRT_ASSEMBLY_VERSION")), + Object::from_static("14.0.0.0"), + ); + } + Rc::new(PyModule { + name: "msvcrt".to_owned(), + filename: None, + dict, + }) +} + +// --------------------------------------------------------------------------- +// Argument helpers. +// --------------------------------------------------------------------------- + +fn int_arg(args: &[Object], idx: usize, func: &str) -> Result { + args.get(idx) + .and_then(Object::as_i64) + .map(|v| v as i32) + .ok_or_else(|| type_error(format!("{func}: argument {} must be an int", idx + 1))) +} + +/// The clinic `char` converter: a `bytes`/`bytearray` of length 1. +fn byte_char_arg(args: &[Object], idx: usize, func: &str) -> Result { + match args.get(idx) { + Some(Object::Bytes(b)) if b.len() == 1 => Ok(b[0]), + Some(Object::ByteArray(b)) if b.borrow().len() == 1 => Ok(b.borrow()[0]), + _ => Err(type_error(format!( + "{func}() argument must be a byte string of length 1" + ))), + } +} + +/// The clinic `int(accept={str})` converter: a one-character `str`, +/// converted to its ordinal. Code points above the BMP truncate to +/// `wchar_t` exactly like CPython's `_putwch(int)` call does. +fn wchar_arg(args: &[Object], idx: usize, func: &str) -> Result { + match args.get(idx) { + Some(Object::Str(s)) => { + let mut it = s.chars(); + match (it.next(), it.next()) { + (Some(c), None) => Ok(c as u16), + _ => Err(type_error(format!( + "{func}() argument must be a str of length 1" + ))), + } + } + // A lone surrogate (WeavePy's WStr arc) is a valid one-char str. + Some(Object::WStr(cps)) if cps.len() == 1 => Ok(cps[0] as u16), + _ => Err(type_error(format!( + "{func}() argument must be a str of length 1" + ))), + } +} + +/// A console wide char as a Python `str`. `_getwch` can hand back one +/// half of a surrogate pair; `str_from_codepoints` keeps it as a lone +/// surrogate exactly like CPython's UCS-2-native `str` would. +fn wchar_to_str(wc: u16) -> Object { + Object::str_from_codepoints(vec![u32::from(wc)]) +} + +// --------------------------------------------------------------------------- +// The fd↔HANDLE bridge + file-region functions. +// --------------------------------------------------------------------------- + +fn msvcrt_get_osfhandle(args: &[Object]) -> Result { + let fd = int_arg(args, 0, "get_osfhandle")?; + let handle = unsafe { crt::_get_osfhandle(fd) }; + if handle == -1 { + return Err(nt_support::last_crt_error_to_py(None)); + } + // PyLong_FromVoidPtr: the handle surfaces unsigned, like _winapi's. + Ok(super::winapi_mod::handle_to_object(handle as usize)) +} + +fn msvcrt_open_osfhandle(args: &[Object]) -> Result { + let handle = super::winapi_mod::handle_arg(args, 0, "open_osfhandle")?; + let flags = int_arg(args, 1, "open_osfhandle")?; + let fd = unsafe { crt::_open_osfhandle(handle as crt::intptr_t, flags) }; + if fd == -1 { + return Err(nt_support::last_crt_error_to_py(None)); + } + Ok(Object::Int(i64::from(fd))) +} + +fn msvcrt_setmode(args: &[Object]) -> Result { + let fd = int_arg(args, 0, "setmode")?; + let mode = int_arg(args, 1, "setmode")?; + let old = unsafe { crt::_setmode(fd, mode) }; + if old == -1 { + return Err(nt_support::last_crt_error_to_py(None)); + } + Ok(Object::Int(i64::from(old))) +} + +fn msvcrt_locking(args: &[Object]) -> Result { + let fd = int_arg(args, 0, "locking")?; + let mode = int_arg(args, 1, "locking")?; + let nbytes = int_arg(args, 2, "locking")?; + // `_locking(LK_LOCK)` retries once a second for ten seconds — a + // blocking region, so drop the GIL like CPython does. Capture errno + // inside the region: re-acquiring the GIL may run CRT calls that + // clobber it. + let (rc, errnum) = crate::gil::allow_threads_then(|| { + let rc = unsafe { crt::_locking(fd, mode, nbytes) }; + (rc, if rc != 0 { nt_support::crt_errno() } else { 0 }) + }); + if rc != 0 { + return Err(nt_support::crt_error_to_py(errnum, None)); + } + Ok(Object::None) +} + +fn msvcrt_heapmin(_args: &[Object]) -> Result { + if unsafe { crt::_heapmin() } != 0 { + return Err(nt_support::last_crt_error_to_py(None)); + } + Ok(Object::None) +} + +// --------------------------------------------------------------------------- +// The conio console family. +// --------------------------------------------------------------------------- + +fn msvcrt_kbhit(_args: &[Object]) -> Result { + Ok(Object::Bool(unsafe { crt::_kbhit() } != 0)) +} + +fn msvcrt_getch(_args: &[Object]) -> Result { + // Blocks until a key is pressed — release the GIL (CPython does). + let ch = crate::gil::allow_threads_then(|| unsafe { crt::_getch() }); + Ok(Object::new_bytes(vec![ch as u8])) +} + +fn msvcrt_getche(_args: &[Object]) -> Result { + let ch = crate::gil::allow_threads_then(|| unsafe { crt::_getche() }); + Ok(Object::new_bytes(vec![ch as u8])) +} + +fn msvcrt_getwch(_args: &[Object]) -> Result { + let wc = crate::gil::allow_threads_then(|| unsafe { crt::_getwch() }); + Ok(wchar_to_str(wc)) +} + +fn msvcrt_getwche(_args: &[Object]) -> Result { + let wc = crate::gil::allow_threads_then(|| unsafe { crt::_getwche() }); + Ok(wchar_to_str(wc)) +} + +fn msvcrt_putch(args: &[Object]) -> Result { + let ch = byte_char_arg(args, 0, "putch")?; + unsafe { crt::_putch(i32::from(ch)) }; + Ok(Object::None) +} + +fn msvcrt_putwch(args: &[Object]) -> Result { + let wc = wchar_arg(args, 0, "putwch")?; + unsafe { crt::_putwch(wc) }; + Ok(Object::None) +} + +fn msvcrt_ungetch(args: &[Object]) -> Result { + let ch = byte_char_arg(args, 0, "ungetch")?; + // EOF (-1) signals the pushback slot is already occupied. + if unsafe { crt::_ungetch(i32::from(ch)) } == -1 { + return Err(nt_support::last_crt_error_to_py(None)); + } + Ok(Object::None) +} + +fn msvcrt_ungetwch(args: &[Object]) -> Result { + let wc = wchar_arg(args, 0, "ungetwch")?; + // WEOF (0xFFFF) is the wide-char twin of EOF. + if unsafe { crt::_ungetwch(wc) } == 0xFFFF { + return Err(nt_support::last_crt_error_to_py(None)); + } + Ok(Object::None) +} + +// --------------------------------------------------------------------------- +// Error modes and CRT debug-report stubs. +// --------------------------------------------------------------------------- + +fn msvcrt_set_error_mode(args: &[Object]) -> Result { + let mode = int_arg(args, 0, "SetErrorMode")? as u32; + let old = unsafe { windows_sys::Win32::System::Diagnostics::Debug::SetErrorMode(mode) }; + Ok(Object::Int(i64::from(old))) +} + +fn msvcrt_get_error_mode(_args: &[Object]) -> Result { + let mode = unsafe { windows_sys::Win32::System::Diagnostics::Debug::GetErrorMode() }; + Ok(Object::Int(i64::from(mode))) +} + +/// `_CrtSetReportMode` exists only in the *debug* CRT (CPython compiles +/// the binding under `#ifdef _DEBUG`); WeavePy links the release UCRT, +/// so the call is accepted and reports "was 0" — enough for the +/// test-support code that toggles assertion popups around subprocesses. +fn msvcrt_crt_set_report_mode(args: &[Object]) -> Result { + let _type = int_arg(args, 0, "CrtSetReportMode")?; + let _mode = int_arg(args, 1, "CrtSetReportMode")?; + Ok(Object::Int(0)) +} + +/// Debug-CRT-only twin of [`msvcrt_crt_set_report_mode`]. +fn msvcrt_crt_set_report_file(args: &[Object]) -> Result { + let _type = int_arg(args, 0, "CrtSetReportFile")?; + Ok(Object::Int(0)) +} diff --git a/crates/weavepy-vm/src/stdlib/multiprocessing_mod.rs b/crates/weavepy-vm/src/stdlib/multiprocessing_mod.rs index c2f1339a..9db09482 100644 --- a/crates/weavepy-vm/src/stdlib/multiprocessing_mod.rs +++ b/crates/weavepy-vm/src/stdlib/multiprocessing_mod.rs @@ -37,10 +37,13 @@ //! - `_get_command()` — the launcher arg vector (`weavepy //! --multiprocessing-fork PAYLOAD_FD …`) used by the spawn child. //! -//! The implementation is POSIX-only; Windows ports can swap the -//! `socketpair`/`fork`/`shm_open` paths for `CreateProcess`/named -//! pipes/CreateFileMapping later. Today's CPython compatibility target -//! is also POSIX, so this isn't blocking parity. +//! The Connection/SharedMemory/spawn surface is POSIX-only. On +//! Windows (RFC 0063 WS2) only [`SemLock`] is provided natively — +//! over `CreateSemaphoreW`/`WaitForSingleObjectEx`/`ReleaseSemaphore` +//! per CPython's `MS_WINDOWS` branches in +//! `Modules/_multiprocessing/semaphore.c` — because the frozen +//! `multiprocessing` win32 branches route everything else through +//! `_winapi` (named pipes, `CreateProcess`, `CreateFileMapping`). //! //! Each primitive is exposed to Python as a [`Object::SimpleNamespace`] //! whose dict carries Rust closures stamped with `BuiltinFn`. State @@ -53,11 +56,10 @@ use crate::object::{DictData, DictKey, Object, PyModule}; use crate::sync::Rc; use crate::sync::RefCell; -/// On non-POSIX hosts we still want to satisfy `import -/// _multiprocessing` — but every method raises -/// `NotImplementedError("requires POSIX")` so the user gets a clear -/// signal instead of a confusing `AttributeError` later. -#[cfg(not(unix))] +/// On hosts that are neither POSIX nor NT we still want to satisfy +/// `import _multiprocessing` — the module is almost empty so the user +/// gets a clear `AttributeError` naming the missing primitive. +#[cfg(not(any(unix, windows)))] pub fn build(_cache: &ModuleCache) -> Rc { let dict = Rc::new(RefCell::new(DictData::default())); dict.borrow_mut().insert( @@ -71,6 +73,56 @@ pub fn build(_cache: &ModuleCache) -> Rc { }) } +/// The NT `_multiprocessing` (RFC 0063 WS2). CPython's Windows module +/// exports exactly `SemLock` + the kind/limit constants — no +/// `sem_unlink` (that's `#ifndef MS_WINDOWS` in +/// `Modules/_multiprocessing/semaphore.c`; the frozen callers guard on +/// platform), no `_posixshmem` surface (shared memory on NT goes +/// through `_winapi.CreateFileMapping` in the frozen layer), and no +/// Connection/Pipe (frozen `connection.py`'s win32 branch is built on +/// `_winapi` named pipes). +#[cfg(windows)] +pub fn build(_cache: &ModuleCache) -> Rc { + let dict = Rc::new(RefCell::new(DictData::default())); + { + let mut d = dict.borrow_mut(); + d.insert( + DictKey(Object::from_static("__name__")), + Object::from_static("_multiprocessing"), + ); + d.insert( + DictKey(Object::from_static("__doc__")), + Object::from_static( + "Low-level multiprocessing primitives (NT arm). Used by \ + the frozen `multiprocessing` module to back `Process`, \ + `Pool`, `Queue`, etc. (RFC 0063)", + ), + ); + d.insert( + DictKey(Object::from_static("SemLock")), + Object::Type(nt_semlock_type()), + ); + // Same shape as the unix arm: kind selectors consumed by + // `multiprocessing/synchronize.py`, plus the placeholder + // `flags` entry the unix arm publishes. + d.insert(DictKey(Object::from_static("flags")), Object::Int(0)); + d.insert( + DictKey(Object::from_static("RECURSIVE_MUTEX")), + Object::Int(0), + ); + d.insert(DictKey(Object::from_static("SEMAPHORE")), Object::Int(1)); + d.insert( + DictKey(Object::from_static("SEM_VALUE_MAX")), + Object::Int(NT_SEM_VALUE_MAX), + ); + } + Rc::new(PyModule { + name: "_multiprocessing".to_owned(), + filename: None, + dict, + }) +} + #[cfg(unix)] use std::os::fd::RawFd; #[cfg(unix)] @@ -836,6 +888,513 @@ fn b_dyn_kw( Object::Builtin(Rc::new(BuiltinFn::with_kwargs(name, body))) } +// --------------------------------------------------------------------- +// SemLock — NT arm (RFC 0063 WS2) +// --------------------------------------------------------------------- + +// A port of the `MS_WINDOWS` branches of CPython's +// `Modules/_multiprocessing/semaphore.c`: a kernel semaphore from +// `CreateSemaphoreW`, waited on with `WaitForSingleObjectEx` and +// posted with `ReleaseSemaphore`. Both kinds (SEMAPHORE and +// RECURSIVE_MUTEX) are the same kernel object; the recursive mutex is +// the maxvalue==1 semaphore plus the per-process `count`/`last_tid` +// bookkeeping that lets the owning thread re-enter without touching +// the kernel (semaphore.c's `ISMINE` fast path). + +#[cfg(windows)] +use std::sync::atomic::{AtomicI64, AtomicU64, Ordering}; +#[cfg(windows)] +use std::sync::Arc; + +#[cfg(windows)] +use crate::error::{ + assertion_error, overflow_error, runtime_error, type_error, value_error, RuntimeError, +}; +#[cfg(windows)] +use crate::object::BuiltinFn; +#[cfg(windows)] +use crate::stdlib::nt_support::{last_win32_error_to_py, win32_error_to_py}; +#[cfg(windows)] +use crate::types::{PyInstance, TypeFlags, TypeObject}; + +#[cfg(windows)] +use windows_sys::Win32::Foundation::{ + CloseHandle, GetLastError, ERROR_TOO_MANY_POSTS, HANDLE, WAIT_FAILED, WAIT_OBJECT_0, + WAIT_TIMEOUT, +}; +#[cfg(windows)] +use windows_sys::Win32::System::Threading::{ + CreateSemaphoreW, ReleaseSemaphore, WaitForSingleObjectEx, INFINITE, +}; + +/// `RECURSIVE_MUTEX` kind (matches `multiprocessing/synchronize.py`). +#[cfg(windows)] +const NT_RECURSIVE_MUTEX_KIND: i64 = 0; + +/// `SemLock.SEM_VALUE_MAX` — semaphore.c defines it as `LONG_MAX` on +/// Windows (`LONG` is 32-bit there regardless of pointer width). +#[cfg(windows)] +const NT_SEM_VALUE_MAX: i64 = 2_147_483_647; + +/// Shared state behind an NT `SemLock`. The `HANDLE` is stored as +/// `isize` so the struct is `Send`/`Sync` without an unsafe impl — +/// kernel object access is inherently thread-safe. `count`/`last_tid` +/// are the per-process recursive-mutex bookkeeping (semaphore.c keeps +/// them as plain C fields under the GIL; atomics keep us honest when +/// the GIL is dropped across waits). +#[cfg(windows)] +struct NtSemInner { + handle: isize, + kind: i64, + maxvalue: i64, + /// Kept only as the Python-visible attribute: the OS object is + /// unnamed (CPython passes `NULL` to `CreateSemaphoreW`; children + /// get the semaphore via handle duplication in `reduction.py`, + /// never by name). + name: Option, + count: AtomicI64, + last_tid: AtomicU64, +} + +#[cfg(windows)] +impl Drop for NtSemInner { + fn drop(&mut self) { + // semaphore.c `semlock_dealloc`: `SEM_CLOSE(self->handle)`, + // i.e. `CloseHandle`. `_rebuild`-adopted handles are owned too + // (the duplicate minted by reduction.py belongs to us). + unsafe { CloseHandle(self.handle as HANDLE) }; + } +} + +#[cfg(windows)] +thread_local! { + static NT_SEMLOCK_TYPE: RefCell>> = const { RefCell::new(None) }; +} + +/// The `_multiprocessing.SemLock` type (NT arm). Built lazily so +/// `type(sl).__name__ == 'SemLock'` and the class attributes +/// (`SEM_VALUE_MAX`, `_rebuild`) resolve — same shape as the unix arm. +#[cfg(windows)] +fn nt_semlock_type() -> Rc { + NT_SEMLOCK_TYPE.with(|cell| { + if let Some(t) = cell.borrow().clone() { + return t; + } + let mut d = DictData::default(); + d.insert( + DictKey(Object::from_static("__module__")), + Object::from_static("_multiprocessing"), + ); + d.insert( + DictKey(Object::from_static("__new__")), + nt_b_dyn("__new__", nt_semlock_new), + ); + d.insert( + DictKey(Object::from_static("__init__")), + nt_b_dyn("__init__", |_| Ok(Object::None)), + ); + // Accessed via the class (`SemLock._rebuild(...)`), so a plain + // builtin behaves like a staticmethod (no instance binding). + d.insert( + DictKey(Object::from_static("_rebuild")), + nt_b_dyn("_rebuild", nt_semlock_rebuild), + ); + d.insert( + DictKey(Object::from_static("SEM_VALUE_MAX")), + Object::Int(NT_SEM_VALUE_MAX), + ); + let t = TypeObject::new_with_flags( + "SemLock", + vec![crate::builtin_types::builtin_types().object_.clone()], + d, + TypeFlags { + is_exception: false, + is_builtin: true, + }, + ) + .expect("SemLock type"); + *cell.borrow_mut() = Some(t.clone()); + t + }) +} + +#[cfg(windows)] +fn nt_sem_arg_int(args: &[Object], idx: usize, what: &str) -> Result { + match args.get(idx) { + Some(Object::Int(n)) => Ok(*n), + Some(Object::Bool(b)) => Ok(i64::from(*b)), + _ => Err(type_error(format!("SemLock() {what} must be an int"))), + } +} + +/// `_multiprocessing.SemLock(kind, value, maxvalue, name, unlink)` — +/// NT arm. semaphore.c's `SEM_CREATE(name, value, maxvalue)` is +/// `CreateSemaphoreW(NULL, value, maxvalue, NULL)`: the OS object is +/// deliberately *unnamed* (children receive it by handle duplication, +/// see `reduction.py`), so `name`/`unlink` only feed the Python-level +/// attribute and are otherwise ignored. +#[cfg(windows)] +fn nt_semlock_new(args: &[Object]) -> Result { + // args[0] is the class object (SemLock); the constructor params + // follow it. + let kind = nt_sem_arg_int(args, 1, "kind")?; + let value = nt_sem_arg_int(args, 2, "value")?; + let maxvalue = nt_sem_arg_int(args, 3, "maxvalue")?; + if kind != NT_RECURSIVE_MUTEX_KIND && kind != 1 { + // semaphore.c semlock_new: "unrecognized kind". + return Err(value_error("unrecognized kind")); + } + if !(0..=NT_SEM_VALUE_MAX).contains(&value) || !(1..=NT_SEM_VALUE_MAX).contains(&maxvalue) { + return Err(value_error("semaphore initial value out of range")); + } + let name = match args.get(4) { + Some(Object::Str(s)) => s.to_string(), + _ => return Err(type_error("SemLock() name must be a str")), + }; + let handle = unsafe { + CreateSemaphoreW( + std::ptr::null(), + value as i32, + maxvalue as i32, + std::ptr::null(), + ) + }; + if handle.is_null() { + return Err(last_win32_error_to_py(None)); + } + let inner = Arc::new(NtSemInner { + handle: handle as isize, + kind, + maxvalue, + name: Some(name), + count: AtomicI64::new(0), + last_tid: AtomicU64::new(0), + }); + Ok(nt_make_semlock_instance(&inner)) +} + +/// `SemLock._rebuild(handle, kind, maxvalue, name)` — reconstruct in a +/// `spawn`ed child. On NT the handle arriving here was already +/// duplicated into this process by `reduction.py` +/// (`DuplicateHandle`/`steal_handle`), so we simply adopt the int. +#[cfg(windows)] +fn nt_semlock_rebuild(args: &[Object]) -> Result { + let handle = match args.first() { + Some(Object::Int(n)) => *n, + _ => return Err(type_error("SemLock._rebuild() handle must be an int")), + }; + let kind = nt_sem_arg_int(args, 1, "kind")?; + let maxvalue = nt_sem_arg_int(args, 2, "maxvalue")?; + let name = match args.get(3) { + Some(Object::Str(s)) => Some(s.to_string()), + _ => None, + }; + let inner = Arc::new(NtSemInner { + handle: handle as isize, + kind, + maxvalue, + name, + count: AtomicI64::new(0), + last_tid: AtomicU64::new(0), + }); + Ok(nt_make_semlock_instance(&inner)) +} + +/// Build the Python-visible `SemLock` instance: attributes plus the +/// method closures that capture the shared [`NtSemInner`]. Mirrors the +/// unix arm's surface exactly (synchronize.py drives both the same +/// way). +#[cfg(windows)] +fn nt_make_semlock_instance(inner: &Arc) -> Object { + let dict = Rc::new(RefCell::new(DictData::default())); + { + let mut d = dict.borrow_mut(); + d.insert( + DictKey(Object::from_static("handle")), + Object::Int(inner.handle as i64), + ); + d.insert( + DictKey(Object::from_static("kind")), + Object::Int(inner.kind), + ); + d.insert( + DictKey(Object::from_static("maxvalue")), + Object::Int(inner.maxvalue), + ); + d.insert( + DictKey(Object::from_static("name")), + match &inner.name { + Some(n) => Object::from_str(n.clone()), + None => Object::None, + }, + ); + let a = inner.clone(); + d.insert( + DictKey(Object::from_static("acquire")), + nt_b_dyn_kw("acquire", move |args, kwargs| { + nt_sem_acquire(&a, args, kwargs) + }), + ); + let r = inner.clone(); + d.insert( + DictKey(Object::from_static("release")), + nt_b_dyn("release", move |_| nt_sem_release(&r)), + ); + let gv = inner.clone(); + d.insert( + DictKey(Object::from_static("_get_value")), + nt_b_dyn("_get_value", move |_| nt_sem_get_value(&gv)), + ); + let ct = inner.clone(); + d.insert( + DictKey(Object::from_static("_count")), + nt_b_dyn("_count", move |_| { + Ok(Object::Int(ct.count.load(Ordering::SeqCst))) + }), + ); + let im = inner.clone(); + d.insert( + DictKey(Object::from_static("_is_mine")), + nt_b_dyn("_is_mine", move |_| { + let me = crate::gil::current_thread_id(); + Ok(Object::Bool( + im.last_tid.load(Ordering::SeqCst) == me && im.count.load(Ordering::SeqCst) > 0, + )) + }), + ); + let iz = inner.clone(); + d.insert( + DictKey(Object::from_static("_is_zero")), + nt_b_dyn("_is_zero", move |_| nt_sem_is_zero(&iz)), + ); + // No fork on NT, but synchronize.py calls this from + // `__setstate__`-adjacent paths portably; semaphore.c compiles + // it unconditionally too. + let af = inner.clone(); + d.insert( + DictKey(Object::from_static("_after_fork")), + nt_b_dyn("_after_fork", move |_| { + af.count.store(0, Ordering::SeqCst); + Ok(Object::None) + }), + ); + let en = inner.clone(); + d.insert( + DictKey(Object::from_static("__enter__")), + nt_b_dyn_kw("__enter__", move |args, kwargs| { + nt_sem_acquire(&en, args, kwargs) + }), + ); + let ex = inner.clone(); + d.insert( + DictKey(Object::from_static("__exit__")), + nt_b_dyn("__exit__", move |_| { + nt_sem_release(&ex)?; + Ok(Object::None) + }), + ); + } + let inst = Rc::new(PyInstance { + class: crate::sync::RefCell::new(nt_semlock_type()), + dict, + native: std::sync::OnceLock::new(), + inline_values: crate::sync::Cell::new(true), + slots: crate::sync::RefCell::new(None), + hash_cache: crate::sync::Cell::new(None), + finalize_ran: crate::sync::Cell::new(false), + c_body: crate::types::CBody::default(), + }); + Object::Instance(inst) +} + +/// semaphore.c's acquire timeout shaping: non-blocking → 0ms, `None` → +/// `INFINITE`, else seconds→ms rounded to nearest with negatives +/// clamped to 0 and near-`DWORD`-max rejected as `OverflowError`. +#[cfg(windows)] +fn nt_timeout_msecs(block: bool, timeout: Option) -> Result { + if !block { + return Ok(0); + } + match timeout { + None => Ok(INFINITE), + Some(t) => { + let ms = (t * 1000.0).max(0.0); + if ms >= f64::from(u32::MAX) - 0.5 { + return Err(overflow_error("timeout is too large")); + } + Ok((ms + 0.5) as u32) + } + } +} + +/// `SemLock.acquire(block=True, timeout=None)` — NT arm. +/// +/// Divergence from semaphore.c: CPython's main thread waits with +/// `WaitForMultipleObjectsEx` on `{semaphore, _PyOS_SigintEvent()}` so +/// a console Ctrl-C can interrupt the wait with `EINTR`. WeavePy has +/// no cross-visible sigint event object, so we issue a plain +/// `WaitForSingleObjectEx`; Ctrl-C is serviced by the eval loop's +/// pending-signal check once the wait returns. +#[cfg(windows)] +fn nt_sem_acquire( + inner: &Arc, + args: &[Object], + kwargs: &[(String, Object)], +) -> Result { + let mut block_obj = args.first().cloned(); + let mut timeout_obj = args.get(1).cloned(); + for (k, v) in kwargs { + match k.as_str() { + "block" | "blocking" => block_obj = Some(v.clone()), + "timeout" => timeout_obj = Some(v.clone()), + other => { + return Err(type_error(format!( + "acquire() got an unexpected keyword argument '{other}'" + ))) + } + } + } + let block = match block_obj { + None | Some(Object::None) => true, + Some(Object::Bool(b)) => b, + Some(Object::Int(i)) => i != 0, + Some(_) => true, + }; + let timeout: Option = match timeout_obj { + None | Some(Object::None) => None, + Some(Object::Float(f)) => Some(f), + Some(Object::Int(i)) => Some(i as f64), + Some(_) => None, + }; + let full_msecs = nt_timeout_msecs(block, timeout)?; + let me = crate::gil::current_thread_id(); + // Recursive-mutex re-entry: already mine → just bump the count + // (semaphore.c's `ISMINE` shortcut). + if inner.kind == NT_RECURSIVE_MUTEX_KIND + && inner.last_tid.load(Ordering::SeqCst) == me + && inner.count.load(Ordering::SeqCst) > 0 + { + inner.count.fetch_add(1, Ordering::SeqCst); + return Ok(Object::Bool(true)); + } + // Uncontended fast path *without* dropping the GIL — semaphore.c + // probes with a zero timeout before `Py_BEGIN_ALLOW_THREADS`. + let handle = inner.handle; + if unsafe { WaitForSingleObjectEx(handle as HANDLE, 0, 0) } == WAIT_OBJECT_0 { + inner.last_tid.store(me, Ordering::SeqCst); + inner.count.fetch_add(1, Ordering::SeqCst); + return Ok(Object::Bool(true)); + } + // Contended: drop the GIL for the real wait (semaphore.c wraps + // exactly this region in ALLOW_THREADS). + let res = crate::gil::allow_threads_then(move || unsafe { + WaitForSingleObjectEx(handle as HANDLE, full_msecs, 0) + }); + match res { + WAIT_TIMEOUT => Ok(Object::Bool(false)), + WAIT_OBJECT_0 => { + inner.last_tid.store(me, Ordering::SeqCst); + inner.count.fetch_add(1, Ordering::SeqCst); + Ok(Object::Bool(true)) + } + WAIT_FAILED => Err(last_win32_error_to_py(None)), + _ => Err(runtime_error( + "WaitForSingleObject() or WaitForMultipleObjects() gave unrecognized value", + )), + } +} + +/// `SemLock.release()` — NT arm. +#[cfg(windows)] +fn nt_sem_release(inner: &Arc) -> Result { + let me = crate::gil::current_thread_id(); + if inner.kind == NT_RECURSIVE_MUTEX_KIND { + if !(inner.last_tid.load(Ordering::SeqCst) == me && inner.count.load(Ordering::SeqCst) > 0) + { + return Err(assertion_error( + "attempt to release recursive lock not owned by thread", + )); + } + if inner.count.load(Ordering::SeqCst) > 1 { + inner.count.fetch_sub(1, Ordering::SeqCst); + return Ok(Object::None); + } + } + // The kernel enforces maxvalue for us: over-releasing fails with + // ERROR_TOO_MANY_POSTS, which semaphore.c maps to ValueError. + if unsafe { ReleaseSemaphore(inner.handle as HANDLE, 1, std::ptr::null_mut()) } == 0 { + let code = unsafe { GetLastError() }; + if code == ERROR_TOO_MANY_POSTS { + return Err(value_error("semaphore or lock released too many times")); + } + return Err(win32_error_to_py(code as i32, None)); + } + inner.count.fetch_sub(1, Ordering::SeqCst); + Ok(Object::None) +} + +/// `SemLock._get_value()` — NT arm. Windows has no `sem_getvalue`; +/// semaphore.c's `_GetSemaphoreValue` probe-acquires with a zero +/// timeout and lets `ReleaseSemaphore`'s previous-count out-param +/// report the value (the undo restores it): acquired → previous + 1, +/// timed out → 0. +#[cfg(windows)] +fn nt_sem_get_value(inner: &Arc) -> Result { + let handle = inner.handle as HANDLE; + match unsafe { WaitForSingleObjectEx(handle, 0, 0) } { + WAIT_OBJECT_0 => { + let mut previous: i32 = 0; + if unsafe { ReleaseSemaphore(handle, 1, &mut previous) } == 0 { + return Err(last_win32_error_to_py(None)); + } + Ok(Object::Int(i64::from(previous) + 1)) + } + WAIT_TIMEOUT => Ok(Object::Int(0)), + _ => Err(last_win32_error_to_py(None)), + } +} + +/// `SemLock._is_zero()` — NT arm: zero-timeout probe; a successful +/// acquire proves the value was non-zero and is immediately undone +/// (semaphore.c `semlock_iszero`, MS_WINDOWS branch). +#[cfg(windows)] +fn nt_sem_is_zero(inner: &Arc) -> Result { + let handle = inner.handle as HANDLE; + if unsafe { WaitForSingleObjectEx(handle, 0, 0) } == WAIT_TIMEOUT { + return Ok(Object::Bool(true)); + } + unsafe { ReleaseSemaphore(handle, 1, std::ptr::null_mut()) }; + Ok(Object::Bool(false)) +} + +/// NT twin of [`b_dyn`] (the unix builders are `#[cfg(unix)]`). +#[cfg(windows)] +fn nt_b_dyn( + name: &'static str, + body: impl Fn(&[Object]) -> Result + Send + Sync + 'static, +) -> Object { + Object::Builtin(Rc::new(BuiltinFn { + name, + binds_instance: false, + call: Box::new(body), + call_kw: None, + })) +} + +/// NT twin of [`b_dyn_kw`] — `SemLock.acquire` accepts +/// `block=`/`timeout=` by keyword. +#[cfg(windows)] +fn nt_b_dyn_kw( + name: &'static str, + body: impl Fn(&[Object], &[(String, Object)]) -> Result + + Send + + Sync + + Clone + + 'static, +) -> Object { + Object::Builtin(Rc::new(BuiltinFn::with_kwargs(name, body))) +} + // --------------------------------------------------------------------- // Connection (socketpair-backed byte channel) // --------------------------------------------------------------------- diff --git a/crates/weavepy-vm/src/stdlib/nt_support.rs b/crates/weavepy-vm/src/stdlib/nt_support.rs new file mode 100644 index 00000000..30778737 --- /dev/null +++ b/crates/weavepy-vm/src/stdlib/nt_support.rs @@ -0,0 +1,406 @@ +//! Shared NT plumbing for the Windows-native runtime core (RFC 0063). +//! +//! This module is the single home for three things every Windows +//! surface consumes: +//! +//! 1. **The CRT fd layer.** WeavePy adopts CPython's fd model on +//! Windows: everything Python-visible is a CRT file descriptor +//! (`_open_osfhandle`/`_get_osfhandle` at the io/mmap boundaries), +//! never a raw `HANDLE`. The UCRT imports live here as one audited +//! `extern` block, plus the handle↔fd registry that keeps +//! `std::fs::File`-backed streams and their minted fds from double +//! closing (a `HANDLE` has exactly one owner; once a CRT fd adopts +//! it, the fd is that owner). +//! 2. **The error bridge.** `winerror_to_errno` transcribes CPython's +//! generated `PC/errmap.h`, `format_message` is the +//! `FormatMessageW` strerror source, and `crt_error_to_py` builds +//! an `OSError` from the CRT's `errno` domain (which +//! `std::io::Error` cannot represent on Windows — its +//! `raw_os_error` is always the Win32 domain). +//! 3. **Wide-string helpers** for the `W`-suffixed Win32 surface. +//! +//! Everything here is `#[cfg(windows)]` (gated at the `mod` +//! declaration). + +use std::collections::HashMap; +use std::ffi::c_void; +use std::fs::File; +use std::io; +use std::os::windows::ffi::{OsStrExt, OsStringExt}; +use std::os::windows::io::{AsRawHandle, FromRawHandle, IntoRawHandle, RawHandle}; +use std::sync::Mutex; + +use crate::error::RuntimeError; + +// --------------------------------------------------------------------------- +// UCRT imports (the CRT fd layer + conio). One block, one audit point. +// --------------------------------------------------------------------------- + +pub(crate) mod crt { + #![allow(non_camel_case_types)] + use std::ffi::c_void; + + pub(crate) type intptr_t = isize; + + unsafe extern "C" { + pub(crate) fn _open_osfhandle(osfhandle: intptr_t, flags: i32) -> i32; + pub(crate) fn _get_osfhandle(fd: i32) -> intptr_t; + pub(crate) fn _close(fd: i32) -> i32; + pub(crate) fn _read(fd: i32, buf: *mut c_void, count: u32) -> i32; + pub(crate) fn _write(fd: i32, buf: *const c_void, count: u32) -> i32; + pub(crate) fn _commit(fd: i32) -> i32; + pub(crate) fn _dup(fd: i32) -> i32; + pub(crate) fn _dup2(fd1: i32, fd2: i32) -> i32; + pub(crate) fn _lseeki64(fd: i32, offset: i64, origin: i32) -> i64; + pub(crate) fn _chsize_s(fd: i32, size: i64) -> i32; + pub(crate) fn _isatty(fd: i32) -> i32; + pub(crate) fn _setmode(fd: i32, mode: i32) -> i32; + pub(crate) fn _pipe(pfds: *mut i32, psize: u32, textmode: i32) -> i32; + pub(crate) fn _locking(fd: i32, mode: i32, nbytes: i32) -> i32; + pub(crate) fn _wsopen_s( + pfh: *mut i32, + filename: *const u16, + oflag: i32, + shflag: i32, + pmode: i32, + ) -> i32; + pub(crate) fn _errno() -> *mut i32; + pub(crate) fn strerror(errnum: i32) -> *const i8; + pub(crate) fn raise(sig: i32) -> i32; + pub(crate) fn _heapmin() -> i32; + // conio (msvcrt's console family). + pub(crate) fn _kbhit() -> i32; + pub(crate) fn _getch() -> i32; + pub(crate) fn _getche() -> i32; + pub(crate) fn _getwch() -> u16; + pub(crate) fn _getwche() -> u16; + pub(crate) fn _putch(c: i32) -> i32; + pub(crate) fn _putwch(c: u16) -> u16; + pub(crate) fn _ungetch(c: i32) -> i32; + pub(crate) fn _ungetwch(c: u16) -> u16; + } + + // CRT `_open`/`_sopen` flag bits (`fcntl.h`). These are *not* the + // POSIX values; `os.O_*` on Windows must publish exactly these. + pub(crate) const O_RDONLY: i32 = 0x0000; + pub(crate) const O_WRONLY: i32 = 0x0001; + pub(crate) const O_RDWR: i32 = 0x0002; + pub(crate) const O_APPEND: i32 = 0x0008; + pub(crate) const O_CREAT: i32 = 0x0100; + pub(crate) const O_TRUNC: i32 = 0x0200; + pub(crate) const O_EXCL: i32 = 0x0400; + pub(crate) const O_TEXT: i32 = 0x4000; + pub(crate) const O_BINARY: i32 = 0x8000; + pub(crate) const O_WTEXT: i32 = 0x10000; + pub(crate) const O_U16TEXT: i32 = 0x20000; + pub(crate) const O_U8TEXT: i32 = 0x40000; + pub(crate) const O_NOINHERIT: i32 = 0x0080; + pub(crate) const O_TEMPORARY: i32 = 0x0040; + pub(crate) const O_RANDOM: i32 = 0x0010; + pub(crate) const O_SEQUENTIAL: i32 = 0x0020; + pub(crate) const O_SHORT_LIVED: i32 = 0x1000; + // `_sopen_s` share flags (`share.h`). CPython opens `_SH_DENYNO`. + pub(crate) const SH_DENYNO: i32 = 0x40; + // `_locking` modes (`sys/locking.h`). + pub(crate) const LK_UNLCK: i32 = 0; + pub(crate) const LK_LOCK: i32 = 1; + pub(crate) const LK_NBLCK: i32 = 2; + pub(crate) const LK_RLCK: i32 = 3; + pub(crate) const LK_NBRLCK: i32 = 4; +} + +/// The CRT's current `errno` value (the *CRT* domain, distinct from +/// `GetLastError()`'s Win32 domain). +pub(crate) fn crt_errno() -> i32 { + unsafe { *crt::_errno() } +} + +/// CRT `strerror(errno)` — the text CPython shows for CRT-domain +/// failures (`os.read` on a bad fd, …). +pub(crate) fn crt_strerror(errnum: i32) -> String { + let ptr = unsafe { crt::strerror(errnum) }; + if ptr.is_null() { + return format!("Unknown error {errnum}"); + } + unsafe { std::ffi::CStr::from_ptr(ptr) } + .to_string_lossy() + .into_owned() +} + +// --------------------------------------------------------------------------- +// Wide-string helpers. +// --------------------------------------------------------------------------- + +/// NUL-terminated UTF-16 for the `W` Win32 surface. +pub(crate) fn wide(s: &str) -> Vec { + std::ffi::OsStr::new(s) + .encode_wide() + .chain(std::iter::once(0)) + .collect() +} + +/// Decode a UTF-16 buffer (no terminator) into a `String`, replacing +/// unpaired surrogates (identity is not load-bearing for error text). +pub(crate) fn from_wide(buf: &[u16]) -> String { + std::ffi::OsString::from_wide(buf) + .to_string_lossy() + .into_owned() +} + +/// Decode a NUL-terminated UTF-16 buffer. +pub(crate) fn from_wide_nul(buf: &[u16]) -> String { + let len = buf.iter().position(|&c| c == 0).unwrap_or(buf.len()); + from_wide(&buf[..len]) +} + +// --------------------------------------------------------------------------- +// The error bridge. +// --------------------------------------------------------------------------- + +/// Transcription of CPython's generated `PC/errmap.h` +/// (`winerror_to_errno`): map a Win32 error to the approximate CRT +/// errno CPython publishes on `OSError.errno`. The Winsock range +/// (10000–11000) passes through untranslated — `errno.WSAE*` values +/// double as errno values on Windows. +pub(crate) fn winerror_to_errno(winerror: i32) -> i32 { + use crate::py_errno as e; + match winerror { + // ERROR_FILE_NOT_FOUND / PATH_NOT_FOUND / INVALID_DRIVE / + // NO_MORE_FILES / BAD_NETPATH / BAD_NET_NAME / BAD_PATHNAME / + // FILENAME_EXCED_RANGE + 2 | 3 | 15 | 18 | 53 | 67 | 161 | 206 => e::ENOENT, + // ERROR_TOO_MANY_OPEN_FILES + 4 => e::EMFILE, + // ERROR_ACCESS_DENIED / CURRENT_DIRECTORY / WRITE_PROTECT / + // BAD_UNIT / NOT_READY / BAD_COMMAND / CRC / BAD_LENGTH / + // SEEK / NOT_DOS_DISK / SECTOR_NOT_FOUND / OUT_OF_PAPER / + // WRITE_FAULT / READ_FAULT / GEN_FAILURE / SHARING_VIOLATION / + // LOCK_VIOLATION / WRONG_DISK / SHARING_BUFFER_EXCEEDED / + // DRIVE_LOCKED / SEEK_ON_DEVICE / NOT_LOCKED / LOCK_FAILED + 5 | 16 | 19..=34 | 36 | 108 | 132 | 158 | 167 => e::EACCES, + // ERROR_INVALID_HANDLE / INVALID_TARGET_HANDLE / + // DIRECT_ACCESS_HANDLE + 6 | 114 | 130 => e::EBADF, + // ERROR_ARENA_TRASHED / NOT_ENOUGH_MEMORY / INVALID_BLOCK / + // NOT_ENOUGH_QUOTA + 7 | 8 | 9 | 1816 => e::ENOMEM, + // ERROR_BAD_ENVIRONMENT + 10 => e::E2BIG, + // ERROR_BAD_FORMAT + the exe-image family + 11 | 182 | 188..=202 => e::ENOEXEC, + // ERROR_NOT_SAME_DEVICE + 17 => e::EXDEV, + // ERROR_FILE_EXISTS / ALREADY_EXISTS + 80 | 183 => e::EEXIST, + // ERROR_NO_PROC_SLOTS / MAX_THRDS_REACHED / NESTING_NOT_ALLOWED + 89 | 164 | 215 => e::EAGAIN, + // ERROR_BROKEN_PIPE / NO_DATA + 109 | 232 => e::EPIPE, + // ERROR_DISK_FULL + 112 => e::ENOSPC, + // ERROR_INVALID_PARAMETER / NEGATIVE_SEEK + 87 | 131 => e::EINVAL, + // ERROR_WAIT_NO_CHILDREN / CHILD_NOT_COMPLETE + 128 | 129 => e::ECHILD, + // ERROR_DIR_NOT_EMPTY + 145 => e::ENOTEMPTY, + // ERROR_DIRECTORY ("The directory name is invalid") + 267 => e::ENOTDIR, + // ERROR_OPERATION_ABORTED (CancelIoEx / alertable-wait cancel) + 995 => e::EINTR, + // ERROR_CONNECTION_ABORTED / CONNECTION_REFUSED map into the + // Winsock-domain values CPython publishes under the POSIX names. + 1236 => e::ECONNABORTED, + 1225 => e::ECONNREFUSED, + // ERROR_SEM_TIMEOUT + 121 => e::ETIMEDOUT, + // Winsock's own range passes through. + 10000..=11000 => winerror, + _ => e::EINVAL, + } +} + +/// `FormatMessageW` for a Win32 (or Winsock) error code, with +/// CPython's trims: trailing CR/LF/dot whitespace removed. Falls back +/// to the CPython shape for unknown codes. +pub(crate) fn format_message(winerror: i32) -> String { + use windows_sys::Win32::System::Diagnostics::Debug::{ + FormatMessageW, FORMAT_MESSAGE_FROM_SYSTEM, FORMAT_MESSAGE_IGNORE_INSERTS, + }; + let mut buf = [0u16; 2048]; + let len = unsafe { + FormatMessageW( + FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, + std::ptr::null(), + winerror as u32, + 0, + buf.as_mut_ptr(), + buf.len() as u32, + std::ptr::null(), + ) + }; + if len == 0 { + return format!("Windows Error 0x{winerror:X}"); + } + let mut s = from_wide(&buf[..len as usize]); + while s.ends_with(['\r', '\n', ' ']) { + s.pop(); + } + s +} + +/// Build the CPython-shaped `OSError` for a Win32 error code: +/// `.winerror` carries the original code, `.errno` the errmap +/// translation, `.strerror` the `FormatMessageW` text, and the PEP +/// 3151 subclass is chosen from the mapped errno. +pub(crate) fn win32_error_to_py(winerror: i32, filename: Option<&str>) -> RuntimeError { + crate::error::os_error_from_parts( + winerror_to_errno(winerror), + format_message(winerror), + filename, + None, + Some(i64::from(winerror)), + ) +} + +/// `win32_error_to_py` from the calling thread's `GetLastError()`. +pub(crate) fn last_win32_error_to_py(filename: Option<&str>) -> RuntimeError { + let code = unsafe { windows_sys::Win32::Foundation::GetLastError() } as i32; + win32_error_to_py(code, filename) +} + +/// Build the CPython-shaped `OSError` for a CRT (`errno`-domain) +/// failure — `os.read` on a stale fd, `_setmode` on a non-fd, …. +/// No `.winerror` is set (CPython's CRT paths don't either). +pub(crate) fn crt_error_to_py(errnum: i32, filename: Option<&str>) -> RuntimeError { + crate::error::os_error_from_parts(errnum, crt_strerror(errnum), filename, None, None) +} + +/// `crt_error_to_py` from the CRT's current `errno`. +pub(crate) fn last_crt_error_to_py(filename: Option<&str>) -> RuntimeError { + crt_error_to_py(crt_errno(), filename) +} + +// --------------------------------------------------------------------------- +// The CRT fd registry: handle↔fd single-ownership bookkeeping. +// --------------------------------------------------------------------------- + +/// Handle→fd map for `std::fs::File`-backed streams that have minted +/// a CRT fd via `fileno()`. Once an fd adopts a handle, the fd is the +/// sole owner: the `File` must be defused (`into_raw_handle`) before +/// the stream releases OS resources, and the release goes through +/// `_close(fd)` (which closes the handle). Keyed by raw handle value. +static CRT_FD_REGISTRY: Mutex>> = Mutex::new(None); + +fn with_registry(f: impl FnOnce(&mut HashMap) -> R) -> R { + let mut guard = CRT_FD_REGISTRY.lock().unwrap_or_else(|e| e.into_inner()); + f(guard.get_or_insert_with(HashMap::new)) +} + +/// The CRT fd for a `Disk`-backed stream, minting one on first use. +/// The minted fd *adopts* the `File`'s handle (no duplication) — the +/// registry records the adoption so the close path releases exactly +/// once, through the fd. +pub(crate) fn fileno_for_disk_file(f: &File) -> io::Result { + let raw = f.as_raw_handle() as usize; + with_registry(|reg| { + if let Some(&fd) = reg.get(&raw) { + return Ok(fd); + } + // O_NOINHERIT mirrors PEP 446: descriptors Python mints are + // non-inheritable. The handle's own inheritance flag is + // separate and unchanged. + let fd = unsafe { crt::_open_osfhandle(raw as crt::intptr_t, crt::O_NOINHERIT) }; + if fd < 0 { + return Err(io::Error::other( + "could not allocate a CRT file descriptor for this handle", + )); + } + reg.insert(raw, fd); + Ok(fd) + }) +} + +/// Register an fd that already owns `handle` (a stream constructed +/// *from* a CRT fd — `io.open(fd)`, `os.fdopen`). +pub(crate) fn register_fd_for_handle(handle: RawHandle, fd: i32) { + with_registry(|reg| reg.insert(handle as usize, fd)); +} + +/// Take (and forget) the fd adopted for `handle`, if any. The caller +/// is about to release the stream and must route the close through +/// `_close(fd)` when this returns `Some`. +pub(crate) fn take_fd_for_handle(handle: RawHandle) -> Option { + with_registry(|reg| reg.remove(&(handle as usize))) +} + +/// Forget an fd closed out from under us (`os.close(f.fileno())`): +/// drop any registry entry naming it so the stream's own close +/// doesn't re-close a recycled fd. +pub(crate) fn forget_fd(fd: i32) { + with_registry(|reg| reg.retain(|_, v| *v != fd)); +} + +/// Release a `Disk` backend on Windows: defuse the `File`'s checked +/// drop, then close through the adopted fd when one exists (the fd +/// owns the handle) or `CloseHandle` directly otherwise. A stale +/// handle/fd reports the error like Unix's swallowed `EBADF` — the +/// caller decides whether to surface it. +pub(crate) fn close_disk_file(f: File) -> io::Result<()> { + let raw = f.into_raw_handle(); + if let Some(fd) = take_fd_for_handle(raw) { + let rc = unsafe { crt::_close(fd) }; + if rc < 0 { + // A stale fd (closed out from under us) is the EBADF story; + // ERROR_INVALID_HANDLE maps to exactly that via the errmap. + return Err(io::Error::from_raw_os_error(6)); + } + return Ok(()); + } + let ok = unsafe { windows_sys::Win32::Foundation::CloseHandle(raw.cast::()) }; + if ok == 0 { + return Err(io::Error::last_os_error()); + } + Ok(()) +} + +/// A `std::fs::File` *view* over a CRT fd, for metadata/`std::io` +/// convenience on streams the fd owns. The view must never be +/// dropped as an owner — wrap-and-forget via `ManuallyDrop`. +pub(crate) fn file_view_from_fd(fd: i32) -> io::Result> { + let handle = unsafe { crt::_get_osfhandle(fd) }; + if handle == -1 || handle == -2 { + // -1: not an open fd; -2: fd not associated with a stream. + return Err(io::Error::from_raw_os_error(6)); // ERROR_INVALID_HANDLE + } + Ok(std::mem::ManuallyDrop::new(unsafe { + File::from_raw_handle(handle as RawHandle) + })) +} + +/// An owning `std::fs::File` constructed from a CRT fd, with the fd +/// recorded in the registry so the eventual `close_disk_file` routes +/// the release back through `_close(fd)`. +pub(crate) fn owning_file_from_fd(fd: i32) -> io::Result { + let handle = unsafe { crt::_get_osfhandle(fd) }; + if handle == -1 || handle == -2 { + return Err(io::Error::from_raw_os_error(6)); + } + let file = unsafe { File::from_raw_handle(handle as RawHandle) }; + register_fd_for_handle(file.as_raw_handle(), fd); + Ok(file) +} + +// --------------------------------------------------------------------------- +// Small shared Win32 conveniences. +// --------------------------------------------------------------------------- + +/// `GetFileType` classification for a CRT fd (pipe/char/disk), used +/// by `os.fstat`'s `st_mode` shaping and `_winapi.GetFileType`. +pub(crate) fn file_type_of_fd(fd: i32) -> Option { + let handle = unsafe { crt::_get_osfhandle(fd) }; + if handle == -1 || handle == -2 { + return None; + } + Some(unsafe { windows_sys::Win32::Storage::FileSystem::GetFileType(handle as *mut c_void) }) +} diff --git a/crates/weavepy-vm/src/stdlib/os.rs b/crates/weavepy-vm/src/stdlib/os.rs index 0d84b68b..dd48e9ef 100644 --- a/crates/weavepy-vm/src/stdlib/os.rs +++ b/crates/weavepy-vm/src/stdlib/os.rs @@ -291,6 +291,9 @@ pub fn build(cache: &ModuleCache) -> Rc { DictKey(Object::from_static("pipe")), builtin("pipe", os_pipe), ); + // `os.openpty` is POSIX-only in CPython (no pty on NT); the name must + // not exist on Windows so `hasattr` probes take the fallback branch. + #[cfg(unix)] d.insert( DictKey(Object::from_static("openpty")), builtin("openpty", os_openpty), @@ -394,20 +397,31 @@ pub fn build(cache: &ModuleCache) -> Rc { DictKey(Object::from_static("waitstatus_to_exitcode")), builtin("waitstatus_to_exitcode", os_waitstatus_to_exitcode), ); - d.insert( - DictKey(Object::from_static("set_blocking")), - builtin("set_blocking", os_set_blocking), - ); - d.insert( - DictKey(Object::from_static("get_blocking")), - builtin("get_blocking", os_get_blocking), - ); - // Common signal numbers — match libc on POSIX. - d.insert(DictKey(Object::from_static("SIGTERM")), Object::Int(15)); - d.insert(DictKey(Object::from_static("SIGKILL")), Object::Int(9)); - d.insert(DictKey(Object::from_static("SIGINT")), Object::Int(2)); - d.insert(DictKey(Object::from_static("SIGHUP")), Object::Int(1)); - d.insert(DictKey(Object::from_static("WNOHANG")), Object::Int(1)); + // `os.get_blocking`/`os.set_blocking` are Unix-only in CPython + // (`O_NONBLOCK` has no CRT-fd analogue); asyncio's proactor path never + // calls them on Windows, and their absence is the documented signal. + #[cfg(unix)] + { + d.insert( + DictKey(Object::from_static("set_blocking")), + builtin("set_blocking", os_set_blocking), + ); + d.insert( + DictKey(Object::from_static("get_blocking")), + builtin("get_blocking", os_get_blocking), + ); + } + // Common signal numbers — match libc on POSIX. CPython's `os` never + // exports `SIG*` (they live in `signal`) nor `WNOHANG` on Windows, so + // these WeavePy conveniences stay Unix-only. + #[cfg(unix)] + { + d.insert(DictKey(Object::from_static("SIGTERM")), Object::Int(15)); + d.insert(DictKey(Object::from_static("SIGKILL")), Object::Int(9)); + d.insert(DictKey(Object::from_static("SIGINT")), Object::Int(2)); + d.insert(DictKey(Object::from_static("SIGHUP")), Object::Int(1)); + d.insert(DictKey(Object::from_static("WNOHANG")), Object::Int(1)); + } // RFC 0040 WS1: POSIX process & fd primitives (fork/exec*/ // posix_spawn/wait*/W*/closerange/setsid/register_at_fork/…). @@ -421,22 +435,27 @@ pub fn build(cache: &ModuleCache) -> Rc { DictKey(Object::from_static("get_exec_path")), builtin("get_exec_path", os_get_exec_path), ); - d.insert( - DictKey(Object::from_static("getuid")), - builtin("getuid", os_getuid), - ); - d.insert( - DictKey(Object::from_static("getgid")), - builtin("getgid", os_getgid), - ); - d.insert( - DictKey(Object::from_static("geteuid")), - builtin("geteuid", os_getuid), - ); - d.insert( - DictKey(Object::from_static("getegid")), - builtin("getegid", os_getgid), - ); + // uid/gid getters are POSIX-only surface: CPython's `nt` module has no + // `getuid` (code probes `hasattr(os, 'getuid')` to detect Unix). + #[cfg(unix)] + { + d.insert( + DictKey(Object::from_static("getuid")), + builtin("getuid", os_getuid), + ); + d.insert( + DictKey(Object::from_static("getgid")), + builtin("getgid", os_getgid), + ); + d.insert( + DictKey(Object::from_static("geteuid")), + builtin("geteuid", os_getuid), + ); + d.insert( + DictKey(Object::from_static("getegid")), + builtin("getegid", os_getgid), + ); + } // Real-/effective-id setters. Beyond letting privilege-dropping code // run, their mere presence flips CPython's `skipIf(hasattr(os, // 'setreuid'))` guards (test_subprocess.test_user_error / @@ -484,6 +503,9 @@ pub fn build(cache: &ModuleCache) -> Rc { DictKey(Object::from_static("chmod")), builtin_kw("chmod", os_chmod), ); + // `os.fchmod` is Unix-only in CPython (`HAVE_FCHMOD`); on Windows even + // `os.chmod(fd, …)` is a TypeError (the path converter rejects fds). + #[cfg(unix)] d.insert( DictKey(Object::from_static("fchmod")), builtin("fchmod", os_fchmod), @@ -561,7 +583,37 @@ pub fn build(cache: &ModuleCache) -> Rc { Object::Int(i64::from(libc::O_ACCMODE)), ); } - #[cfg(not(unix))] + // Windows: the CRT's `_open`/`_wsopen_s` flag values (fcntl.h), which + // differ from every POSIX platform's. CPython's `nt` publishes exactly + // this set (posixmodule.c `all_ins`): the shared O_* core plus the + // CRT-only text/binary/inheritance/lifetime bits. There is no + // `O_NONBLOCK`/`O_CLOEXEC`/`O_NOCTTY` on Windows. + #[cfg(windows)] + { + use crate::stdlib::nt_support::crt; + for (name, v) in [ + ("O_RDONLY", crt::O_RDONLY), + ("O_WRONLY", crt::O_WRONLY), + ("O_RDWR", crt::O_RDWR), + ("O_CREAT", crt::O_CREAT), + ("O_EXCL", crt::O_EXCL), + ("O_TRUNC", crt::O_TRUNC), + ("O_APPEND", crt::O_APPEND), + ("O_TEXT", crt::O_TEXT), + ("O_BINARY", crt::O_BINARY), + ("O_NOINHERIT", crt::O_NOINHERIT), + ("O_TEMPORARY", crt::O_TEMPORARY), + ("O_SHORT_LIVED", crt::O_SHORT_LIVED), + ("O_RANDOM", crt::O_RANDOM), + ("O_SEQUENTIAL", crt::O_SEQUENTIAL), + ] { + d.insert( + DictKey(Object::from_static(name)), + Object::Int(i64::from(v)), + ); + } + } + #[cfg(not(any(unix, windows)))] { d.insert(DictKey(Object::from_static("O_RDONLY")), Object::Int(0)); d.insert(DictKey(Object::from_static("O_WRONLY")), Object::Int(1)); @@ -611,13 +663,18 @@ pub fn build(cache: &ModuleCache) -> Rc { d.insert(DictKey(Object::from_static("R_OK")), Object::Int(4)); d.insert(DictKey(Object::from_static("W_OK")), Object::Int(2)); d.insert(DictKey(Object::from_static("X_OK")), Object::Int(1)); - d.insert(DictKey(Object::from_static("EX_OK")), Object::Int(0)); - d.insert(DictKey(Object::from_static("EX_USAGE")), Object::Int(64)); - d.insert(DictKey(Object::from_static("EX_DATAERR")), Object::Int(65)); - d.insert(DictKey(Object::from_static("EX_NOINPUT")), Object::Int(66)); - d.insert(DictKey(Object::from_static("EX_SOFTWARE")), Object::Int(70)); - d.insert(DictKey(Object::from_static("EX_OSERR")), Object::Int(71)); - d.insert(DictKey(Object::from_static("EX_IOERR")), Object::Int(74)); + // `EX_*` come from ``, which Windows lacks — CPython only + // exposes them where the header defines them, so gate to Unix. + #[cfg(unix)] + { + d.insert(DictKey(Object::from_static("EX_OK")), Object::Int(0)); + d.insert(DictKey(Object::from_static("EX_USAGE")), Object::Int(64)); + d.insert(DictKey(Object::from_static("EX_DATAERR")), Object::Int(65)); + d.insert(DictKey(Object::from_static("EX_NOINPUT")), Object::Int(66)); + d.insert(DictKey(Object::from_static("EX_SOFTWARE")), Object::Int(70)); + d.insert(DictKey(Object::from_static("EX_OSERR")), Object::Int(71)); + d.insert(DictKey(Object::from_static("EX_IOERR")), Object::Int(74)); + } // macOS `fcopyfile(3)` fast clone. CPython exposes `posix._fcopyfile` // plus the `_COPYFILE_*` flag bits; `shutil.copyfile` uses them for a // zero-copy reflink on APFS/HFS+ (`test_shutil.TestZeroCopyMACOS`, and @@ -666,6 +723,49 @@ pub fn build(cache: &ModuleCache) -> Rc { ); } + // RFC 0063 WS1 — the NT-only surface CPython's `nt` module exports on + // Windows (posixmodule.c under `MS_WINDOWS`). Portable code probes + // these with `hasattr` (`shutil.disk_usage`, `webbrowser`, + // `getpass.getuser`), and `ntpath` imports the `_get*` fast paths. + #[cfg(windows)] + { + d.insert( + DictKey(Object::from_static("getlogin")), + builtin("getlogin", os_getlogin), + ); + d.insert( + DictKey(Object::from_static("startfile")), + builtin_kw("startfile", os_startfile), + ); + // `os.fsync` (CRT `_commit`). Registered Windows-only for now: the + // POSIX build never exposed `fsync`, and adding it there would + // change the measured host surface outside this wave's scope. + d.insert( + DictKey(Object::from_static("fsync")), + builtin("fsync", os_fsync), + ); + d.insert( + DictKey(Object::from_static("_getfullpathname")), + builtin("_getfullpathname", nt_getfullpathname), + ); + d.insert( + DictKey(Object::from_static("_getfinalpathname")), + builtin("_getfinalpathname", nt_getfinalpathname), + ); + d.insert( + DictKey(Object::from_static("_getvolumepathname")), + builtin("_getvolumepathname", nt_getvolumepathname), + ); + d.insert( + DictKey(Object::from_static("_getdiskusage")), + builtin("_getdiskusage", nt_getdiskusage), + ); + d.insert( + DictKey(Object::from_static("_path_splitroot_ex")), + builtin("_path_splitroot_ex", nt_path_splitroot_ex), + ); + } + // `os.supports_follow_symlinks` must hold the *function objects* that // honour `follow_symlinks=` — `shutil.copystat`/`copy2` and `tempfile` // test membership (`fn in os.supports_follow_symlinks`) and fall back to @@ -959,7 +1059,15 @@ fn initial_environ() -> Object { // round-trip through `os.environ` / `os.environb` // (test_subprocess.test_undecodable_env). for (k, v) in std::env::vars_os() { - d.insert(DictKey(fsdecode_osstr(&k)), fsdecode_osstr(&v)); + // Windows environment names are case-insensitive; CPython's `os.py` + // normalises them by wrapping `nt.environ` in an `_Environ` whose + // `encodekey` is `str.upper`, so every visible key is upper-cased at + // snapshot time. Match that here since WeavePy's `os` is native. + #[cfg(windows)] + let key = Object::from_str(k.to_string_lossy().to_uppercase()); + #[cfg(not(windows))] + let key = fsdecode_osstr(&k); + d.insert(DictKey(key), fsdecode_osstr(&v)); } Object::Dict(Rc::new(RefCell::new(d))) } @@ -1515,6 +1623,7 @@ fn os_makedirs_kw(args: &[Object], kwargs: &[(String, Object)]) -> Result (&str, &str) { match p.rfind('/') { Some(i) => { @@ -1531,6 +1640,69 @@ fn posix_split(p: &str) -> (&str, &str) { } } +/// `ntpath.splitdrive`: peel the drive letter (`C:`), UNC share +/// (`\\server\share`), or device/verbatim prefix (`\\?\C:`, `\\.\pipe`) +/// off the front so the split below never treats it as a component. +#[cfg(windows)] +fn nt_splitdrive(p: &str) -> (&str, &str) { + let is_sep = |c: char| c == '\\' || c == '/'; + let b = p.as_bytes(); + if b.len() >= 2 { + if is_sep(b[0] as char) && is_sep(b[1] as char) { + // `\\server\share` / `\\?\C:` — the drive runs through the + // second component (ntpath.splitroot's UNC arm); a path + // with no second component is all drive. + let rest = &p[2..]; + if let Some(i) = rest.find(is_sep) { + if let Some(j) = rest[i + 1..].find(is_sep) { + let cut = 2 + i + 1 + j; + return (&p[..cut], &p[cut..]); + } + } + return (p, ""); + } + if b[1] == b':' && b[0].is_ascii_alphabetic() { + return (&p[..2], &p[2..]); + } + } + ("", p) +} + +/// `ntpath.split`: like [`posix_split`] but with both separators and the +/// drive/UNC prefix kept attached to `head` (never split into, never +/// stripped down to nothing — `C:\` stays `C:\`). +#[cfg(windows)] +fn nt_split(p: &str) -> (&str, &str) { + let is_sep = |c: char| c == '\\' || c == '/'; + let (drive, rest) = nt_splitdrive(p); + let i = rest.rfind(is_sep).map_or(0, |i| i + 1); + let (head, tail) = rest.split_at(i); + let trimmed = head.trim_end_matches(is_sep); + let head_len = if trimmed.is_empty() { + head.len() + } else { + trimmed.len() + }; + (&p[..drive.len() + head_len], tail) +} + +/// `os.path.split` for the host platform, as `os.makedirs`' recursion +/// requires: CPython's `makedirs` splits with `os.path.split`, so on +/// Windows the backslash-separated paths every `os.path.normpath` +/// consumer produces (sysconfig hands venv `{base}\Lib\site-packages`) +/// must split on `\` too, or the parent chain is never created and the +/// leaf `mkdir` dies with ERROR_PATH_NOT_FOUND. +fn host_path_split(p: &str) -> (&str, &str) { + #[cfg(windows)] + { + nt_split(p) + } + #[cfg(not(windows))] + { + posix_split(p) + } +} + /// Create a single directory with `mode` (umask still applies via `mkdir(2)`). #[cfg(unix)] fn mkdir_one(path: &str, mode: u32) -> std::io::Result<()> { @@ -1550,9 +1722,9 @@ fn makedirs_recursive( mode: u32, exist_ok: bool, ) -> Result<(), (std::io::Error, String)> { - let (mut head, mut tail) = posix_split(name); + let (mut head, mut tail) = host_path_split(name); if tail.is_empty() { - let (h, t) = posix_split(head); + let (h, t) = host_path_split(head); head = h; tail = t; } @@ -1718,7 +1890,34 @@ fn os_urandom(args: &[Object]) -> Result { fill_os_random(&mut out).map_err(|e| crate::error::io_error_to_py(&e))?; Ok(Object::new_bytes(out)) } - #[cfg(not(unix))] + // Windows: the system-preferred CSPRNG, exactly CPython's + // `_PyOS_URandom` → `BCryptGenRandom(NULL, …, + // BCRYPT_USE_SYSTEM_PREFERRED_RNG)` (Python/bootstrap_hash.c). + #[cfg(windows)] + { + use windows_sys::Win32::Security::Cryptography::{ + BCryptGenRandom, BCRYPT_USE_SYSTEM_PREFERRED_RNG, + }; + let mut out = vec![0u8; n]; + // BCryptGenRandom takes a u32 length; chunk absurdly large requests. + for chunk in out.chunks_mut(1 << 30) { + let status = unsafe { + BCryptGenRandom( + std::ptr::null_mut(), + chunk.as_mut_ptr(), + chunk.len() as u32, + BCRYPT_USE_SYSTEM_PREFERRED_RNG, + ) + }; + if status != 0 { + return Err(crate::error::os_error(format!( + "BCryptGenRandom failed (NTSTATUS 0x{status:08X})" + ))); + } + } + Ok(Object::new_bytes(out)) + } + #[cfg(not(any(unix, windows)))] { let mut out = vec![0u8; n]; for (i, b) in out.iter_mut().enumerate() { @@ -1754,7 +1953,22 @@ fn os_close_fd(fd: i64) -> Result { Ok(Object::None) } -#[cfg(not(unix))] +/// Windows: close the CRT fd with `_close` (which closes the owned handle, +/// CPython's `os_close_impl`) and drop any registry entry naming it so a +/// `Disk`-backed stream that minted this fd doesn't double-close. +#[cfg(windows)] +fn os_close_fd(fd: i64) -> Result { + use crate::stdlib::nt_support::{self, crt}; + let fd = i32::try_from(fd).map_err(|_| value_error("file descriptor out of range"))?; + let rc = unsafe { crt::_close(fd) }; + if rc != 0 { + return Err(nt_support::last_crt_error_to_py(None)); + } + nt_support::forget_fd(fd); + Ok(Object::None) +} + +#[cfg(not(any(unix, windows)))] fn os_close_fd(_fd: i64) -> Result { Ok(Object::None) } @@ -1821,7 +2035,46 @@ fn os_open_stub(args: &[Object], kwargs: &[(String, Object)]) -> Result Result { + use crate::stdlib::nt_support::{crt, crt_error_to_py, wide}; + let p = path_arg_or_kw(args, 0, "path", kwargs, "open")?; + let flags = int_arg_or_kw(args, 1, "flags", kwargs) + .ok_or_else(|| crate::error::type_error("open() flags must be an int".to_owned()))?; + // `mode` feeds the CRT pmode (only `_S_IREAD`/`_S_IWRITE` matter); CPython + // passes it through untranslated. + let mode = int_arg_or_kw(args, 2, "mode", kwargs).unwrap_or(0o777) as i32; + // No `openat` on NT — CPython rejects a non-None `dir_fd` the same way. + reject_dir_fd(kwargs, "open")?; + if p.as_bytes().contains(&0) { + return Err(value_error("embedded null byte")); + } + // PEP 446: descriptors Python creates are non-inheritable — CPython's + // `os_open_impl` ORs in `O_NOINHERIT` (the CRT spelling of `O_CLOEXEC`). + let mut oflags = flags as i32 | crt::O_NOINHERIT; + // CPython initialises the CRT with the *binary* default fmode + // (`_Py_InitializeCore` / config->legacy_windows_fs_encoding path sets + // `_set_fmode(_O_BINARY)`), so an `os.open` with no explicit text bit + // yields a binary fd. WeavePy doesn't flip the process-global CRT + // default; passing `O_BINARY` explicitly when no text/binary bit is set + // is behaviourally identical and keeps the CRT state untouched. + if oflags & (crt::O_TEXT | crt::O_WTEXT | crt::O_U16TEXT | crt::O_U8TEXT | crt::O_BINARY) == 0 { + oflags |= crt::O_BINARY; + } + let wpath = wide(&p); + let mut fd: i32 = -1; + // `_wsopen_s` returns the errno directly (not through the TLS `errno`). + let err = unsafe { crt::_wsopen_s(&raw mut fd, wpath.as_ptr(), oflags, crt::SH_DENYNO, mode) }; + if err != 0 { + return Err(crt_error_to_py(err, Some(&p))); + } + Ok(Object::Int(i64::from(fd))) +} + +#[cfg(not(any(unix, windows)))] fn os_open_stub(_args: &[Object], _kwargs: &[(String, Object)]) -> Result { Err(crate::error::not_implemented_error( "os.open(): raw fd interface is not implemented in WeavePy yet", @@ -1866,7 +2119,23 @@ fn open_flag_bits() -> (i64, i64, i64, i64, i64, i64) { ) } -#[cfg(not(unix))] +// Windows: the CRT flag values, agreeing with the `os.O_*` constants the +// module publishes (an `opener` that forwards to `os.open` must see the +// same bits `_wsopen_s` understands). +#[cfg(windows)] +fn open_flag_bits() -> (i64, i64, i64, i64, i64, i64) { + use crate::stdlib::nt_support::crt; + ( + i64::from(crt::O_WRONLY), + i64::from(crt::O_RDWR), + i64::from(crt::O_CREAT), + i64::from(crt::O_EXCL), + i64::from(crt::O_TRUNC), + i64::from(crt::O_APPEND), + ) +} + +#[cfg(not(any(unix, windows)))] fn open_flag_bits() -> (i64, i64, i64, i64, i64, i64) { (1, 2, 64, 128, 512, 1024) } @@ -1976,7 +2245,55 @@ fn os_fdopen(args: &[Object], kwargs: &[(String, Object)]) -> Result Result { + use crate::object::{FileBackend, PyFile}; + // CPython 3.12+: a `bool` fd raises a `RuntimeWarning` before anything + // else (mirrors the Unix arm). + if matches!(args.first(), Some(Object::Bool(_))) { + warn_bool_as_fd()?; + } + let fd = args + .first() + .and_then(crate::object::Object::as_i64) + .ok_or_else(|| crate::error::type_error("fdopen() fd must be an int".to_owned()))?; + let fd = i32::try_from(fd).map_err(|_| value_error("file descriptor out of range"))?; + // CPython's `io.open(fd, …)` fstats the descriptor and raises + // `OSError(EBADF)` for an invalid fd; `_get_osfhandle` inside + // `owning_file_from_fd` performs the equivalent validation. + let file = crate::stdlib::nt_support::owning_file_from_fd(fd) + .map_err(|_| crate::stdlib::nt_support::crt_error_to_py(crate::py_errno::EBADF, None))?; + let mode = match args.get(1) { + Some(Object::Str(s)) => s.to_string(), + None => "r".to_owned(), + Some(_) => { + return Err(crate::error::type_error( + "fdopen() mode must be str".to_owned(), + )) + } + }; + let pf = PyFile::new(format!(""), mode, FileBackend::Disk(file)); + pf.no_name.set(true); + let kw = |name: &str| kwargs.iter().find(|(k, _)| k == name).map(|(_, v)| v); + let buffering = args.get(2).or_else(|| kw("buffering")); + let encoding = args.get(3).or_else(|| kw("encoding")); + let errors = args.get(4).or_else(|| kw("errors")); + let newline = args.get(5).or_else(|| kw("newline")); + let binary = pf.binary; + crate::stdlib::io_full::finish_open( + Object::File(Rc::new(pf)), + buffering, + encoding, + errors, + newline, + binary, + ) +} + +#[cfg(not(any(unix, windows)))] fn os_fdopen(_args: &[Object], _kwargs: &[(String, Object)]) -> Result { Err(crate::error::not_implemented_error( "os.fdopen(): raw fd interface is not implemented in WeavePy yet", @@ -2090,7 +2407,32 @@ fn os_fstat(args: &[Object]) -> Result { let meta = f.metadata().map_err(|e| crate::error::io_error_to_py(&e))?; Ok(stat_result_from_meta(&meta)) } - #[cfg(not(unix))] + // Windows: classify the fd's handle first (CPython's `_Py_fstat` does + // `GetFileType` and synthesises `S_IFIFO`/`S_IFCHR` for pipes/console + // handles, where `GetFileInformationByHandle` would fail), then read the + // real metadata through a non-owning `File` view for disk files. + #[cfg(windows)] + { + use crate::stdlib::nt_support; + use windows_sys::Win32::Storage::FileSystem::{FILE_TYPE_CHAR, FILE_TYPE_PIPE}; + let fd = i32::try_from(fd).map_err(|_| value_error("file descriptor out of range"))?; + let Some(ftype) = nt_support::file_type_of_fd(fd) else { + return Err(nt_support::crt_error_to_py(crate::py_errno::EBADF, None)); + }; + match ftype { + FILE_TYPE_PIPE => Ok(stat_result_synthetic(0o010_666)), // S_IFIFO + FILE_TYPE_CHAR => Ok(stat_result_synthetic(0o020_666)), // S_IFCHR + _ => { + let view = nt_support::file_view_from_fd(fd) + .map_err(|_| nt_support::crt_error_to_py(crate::py_errno::EBADF, None))?; + let meta = view + .metadata() + .map_err(|e| crate::error::io_error_to_py(&e))?; + Ok(stat_result_from_meta(&meta)) + } + } + } + #[cfg(not(any(unix, windows)))] { let _ = fd; Err(crate::error::not_implemented_error( @@ -2099,6 +2441,33 @@ fn os_fstat(args: &[Object]) -> Result { } } +/// A `stat_result` for handles that have no filesystem identity (pipes, +/// console fds): only `st_mode` is meaningful, everything else is zero — +/// the shape CPython's `_Py_attribute_data_to_stat` produces for them. +#[cfg(windows)] +fn stat_result_synthetic(mode: i64) -> Object { + use crate::types::PyInstance; + let ty = stat_result_type(); + let inst = PyInstance::new(ty); + { + let mut d = inst.dict.borrow_mut(); + d.insert(DictKey(Object::from_static("st_mode")), Object::Int(mode)); + for f in [ + "st_ino", "st_dev", "st_nlink", "st_uid", "st_gid", "st_size", + ] { + d.insert(DictKey(Object::from_static(f)), Object::Int(0)); + } + for f in ["st_atime", "st_mtime", "st_ctime"] { + d.insert(DictKey(Object::from_static(f)), Object::Float(0.0)); + } + for f in ["st_atime_ns", "st_mtime_ns", "st_ctime_ns"] { + d.insert(DictKey(Object::from_static(f)), Object::Int(0)); + } + } + stat_seq_finish(&inst); + Object::Instance(Rc::new(inst)) +} + /// `os.lstat(path, *, dir_fd=None)` — `stat` on the link itself. `dir_fd` is /// unsupported (only `None`). fn os_lstat_kw(args: &[Object], kwargs: &[(String, Object)]) -> Result { @@ -2323,6 +2692,23 @@ fn stat_result_from_meta(meta: &std::fs::Metadata) -> Object { Object::Int((ctime * 1e9) as i64), ); } + // Windows-only extras CPython adds to `stat_result` (posixmodule.c's + // `STRUCT_STAT` under `MS_WINDOWS`): the raw `dwFileAttributes` word — + // `ntpath.isjunction`/`stat.FILE_ATTRIBUTE_*` consumers read it — and the + // reparse tag (0 here: `std::fs::Metadata` doesn't surface the tag, and 0 + // is what CPython reports for non-reparse-point files). + #[cfg(windows)] + { + use std::os::windows::fs::MetadataExt; + d.insert( + DictKey(Object::from_static("st_file_attributes")), + Object::Int(i64::from(meta.file_attributes())), + ); + d.insert( + DictKey(Object::from_static("st_reparse_tag")), + Object::Int(0), + ); + } drop(d); stat_seq_finish(&inst); Object::Instance(Rc::new(inst)) @@ -3518,7 +3904,53 @@ fn os_kill(args: &[Object]) -> Result { Ok(Object::None) } -#[cfg(not(unix))] +/// Windows `os.kill` — CPython's `os_kill_impl` under `MS_WINDOWS`: the two +/// console-control "signals" (`CTRL_C_EVENT`/`CTRL_BREAK_EVENT`) route to +/// `GenerateConsoleCtrlEvent(sig, pid)`; anything else terminates the target +/// via `OpenProcess` + `TerminateProcess(handle, sig)`. +#[cfg(windows)] +fn os_kill(args: &[Object]) -> Result { + use crate::stdlib::nt_support::last_win32_error_to_py; + use windows_sys::Win32::Foundation::CloseHandle; + use windows_sys::Win32::System::Console::{ + GenerateConsoleCtrlEvent, CTRL_BREAK_EVENT, CTRL_C_EVENT, + }; + use windows_sys::Win32::System::Threading::{ + OpenProcess, TerminateProcess, PROCESS_ALL_ACCESS, + }; + let pid = match args.first().and_then(Object::as_i64) { + Some(p) => p, + None => return Err(type_error("kill() pid must be int")), + }; + let sig = match args.get(1).and_then(Object::as_i64) { + Some(s) => s, + None => return Err(type_error("kill() signal must be int")), + }; + if sig == i64::from(CTRL_C_EVENT) || sig == i64::from(CTRL_BREAK_EVENT) { + if unsafe { GenerateConsoleCtrlEvent(sig as u32, pid as u32) } == 0 { + return Err(last_win32_error_to_py(None)); + } + return Ok(Object::None); + } + // SAFETY: plain Win32 calls; the handle is closed on every path. + let handle = unsafe { OpenProcess(PROCESS_ALL_ACCESS, 0, pid as u32) }; + if handle.is_null() { + return Err(last_win32_error_to_py(None)); + } + let ok = unsafe { TerminateProcess(handle, sig as u32) }; + let err = if ok == 0 { + Some(last_win32_error_to_py(None)) + } else { + None + }; + unsafe { CloseHandle(handle) }; + match err { + Some(e) => Err(e), + None => Ok(Object::None), + } +} + +#[cfg(not(any(unix, windows)))] fn os_kill(_args: &[Object]) -> Result { Err(crate::error::not_implemented_error( "os.kill() is only implemented on POSIX in WeavePy", @@ -3548,7 +3980,36 @@ fn os_system(args: &[Object]) -> Result { Ok(Object::Int(i64::from(status))) } -#[cfg(not(unix))] +/// Windows `os.system` — CPython calls the CRT's wide `_wsystem` and +/// returns its result (the `cmd.exe` exit code) directly. +#[cfg(windows)] +fn os_system(args: &[Object]) -> Result { + // Not part of nt_support's audited CRT block (os.system is the only + // consumer); declared here like CPython keeps `_wsystem` local to + // posixmodule.c. + unsafe extern "C" { + fn _wsystem(command: *const u16) -> i32; + } + let command = match args.first() { + Some(Object::Str(s)) => s.to_string(), + Some(Object::Bytes(b)) => String::from_utf8_lossy(b).into_owned(), + _ => { + return Err(type_error( + "system() argument must be str or bytes, not None", + )) + } + }; + if command.as_bytes().contains(&0) { + return Err(crate::error::value_error("embedded null byte")); + } + let wcmd = crate::stdlib::nt_support::wide(&command); + // Release the GIL: the child shell can run arbitrarily long and may + // itself be a WeavePy re-invocation that needs the lock. + let status = crate::gil::allow_threads_then(|| unsafe { _wsystem(wcmd.as_ptr()) }); + Ok(Object::Int(i64::from(status))) +} + +#[cfg(not(any(unix, windows)))] fn os_system(_args: &[Object]) -> Result { Err(crate::error::not_implemented_error( "os.system() is only implemented on POSIX in WeavePy", @@ -3591,7 +4052,41 @@ fn os_waitpid(args: &[Object]) -> Result { ])) } -#[cfg(not(unix))] +/// Windows `os.waitpid` — the `pid` is a process *handle* returned by +/// `os.spawnv(P_NOWAIT, …)`, and the wait is the CRT's `_cwait` +/// (posixmodule.c `os_waitpid_impl` under `MS_WINDOWS`). The returned +/// status is the exit code shifted left 8 bits, so the portable +/// `os.waitstatus_to_exitcode(status)` (`status >> 8`) recovers it. +#[cfg(windows)] +fn os_waitpid(args: &[Object]) -> Result { + unsafe extern "C" { + fn _cwait(termstat: *mut i32, prochandle: isize, action: i32) -> isize; + } + let pid = match args.first() { + Some(Object::Int(p)) => *p, + _ => return Err(type_error("waitpid() pid must be int")), + }; + let options = match args.get(1) { + Some(Object::Int(o)) => *o as i32, + Some(Object::None) | None => 0, + _ => return Err(type_error("waitpid() options must be int")), + }; + let mut status: i32 = 0; + let status_ptr: *mut i32 = &raw mut status; + // Release the GIL across the blocking wait, mirroring the Unix arm + // (`_cwait` ignores `action`, but CPython passes it through too). + let rc = + crate::gil::allow_threads_then(|| unsafe { _cwait(status_ptr, pid as isize, options) }); + if rc == -1 { + return Err(crate::stdlib::nt_support::last_crt_error_to_py(None)); + } + Ok(Object::new_tuple(vec![ + Object::Int(rc as i64), + Object::Int(i64::from(status) << 8), + ])) +} + +#[cfg(not(any(unix, windows)))] fn os_waitpid(_args: &[Object]) -> Result { Err(crate::error::not_implemented_error( "os.waitpid() is only implemented on POSIX in WeavePy", @@ -3627,7 +4122,19 @@ fn os_waitstatus_to_exitcode(args: &[Object]) -> Result { } } -#[cfg(not(unix))] +/// Windows `os.waitstatus_to_exitcode` — the inverse of `os.waitpid`'s +/// `<< 8` encoding: CPython's Windows arm is simply `status >> 8`. +#[cfg(windows)] +fn os_waitstatus_to_exitcode(args: &[Object]) -> Result { + let status = match args.first() { + Some(Object::Int(s)) => *s, + Some(Object::Bool(b)) => i64::from(*b), + _ => return Err(type_error("an integer is required")), + }; + Ok(Object::Int(status >> 8)) +} + +#[cfg(not(any(unix, windows)))] fn os_waitstatus_to_exitcode(_args: &[Object]) -> Result { Err(crate::error::not_implemented_error( "os.waitstatus_to_exitcode() is only implemented on POSIX in WeavePy", @@ -3668,12 +4175,8 @@ fn os_set_blocking(args: &[Object]) -> Result { Ok(Object::None) } -#[cfg(not(unix))] -fn os_set_blocking(_args: &[Object]) -> Result { - Err(crate::error::not_implemented_error( - "os.set_blocking() is only implemented on POSIX in WeavePy", - )) -} +// No non-Unix arm: the registration is `#[cfg(unix)]` (CPython's `nt` has no +// `set_blocking`/`get_blocking` — `O_NONBLOCK` has no CRT-fd analogue). /// `os.get_blocking(fd)` — `True` if `fd` is in blocking mode (i.e. /// `O_NONBLOCK` is clear). @@ -3692,13 +4195,6 @@ fn os_get_blocking(args: &[Object]) -> Result { Ok(Object::Bool(flags & libc::O_NONBLOCK == 0)) } -#[cfg(not(unix))] -fn os_get_blocking(_args: &[Object]) -> Result { - Err(crate::error::not_implemented_error( - "os.get_blocking() is only implemented on POSIX in WeavePy", - )) -} - fn os_pipe(_args: &[Object]) -> Result { #[cfg(unix)] { @@ -3730,16 +4226,54 @@ fn os_pipe(_args: &[Object]) -> Result { Object::Int(i64::from(fds[1])), ])) } - #[cfg(not(unix))] + // Windows: CPython's `os_pipe_impl` — an anonymous pipe from + // `CreatePipe` (NULL security attributes ⇒ non-inheritable handles, + // PEP 446), each end adopted into a CRT fd with `O_NOINHERIT`. + #[cfg(windows)] { - Err(crate::error::not_implemented_error( - "os.pipe() is only implemented on POSIX in WeavePy", - )) - } -} - + use crate::stdlib::nt_support::{crt, last_crt_error_to_py, last_win32_error_to_py}; + use windows_sys::Win32::Foundation::CloseHandle; + use windows_sys::Win32::System::Pipes::CreatePipe; + let mut read: *mut std::ffi::c_void = std::ptr::null_mut(); + let mut write: *mut std::ffi::c_void = std::ptr::null_mut(); + // SAFETY: plain Win32/CRT calls; on every failure path the handles + // that haven't been adopted by a CRT fd are closed exactly once. + unsafe { + if CreatePipe(&raw mut read, &raw mut write, std::ptr::null(), 0) == 0 { + return Err(last_win32_error_to_py(None)); + } + let rfd = crt::_open_osfhandle(read as crt::intptr_t, crt::O_RDONLY | crt::O_NOINHERIT); + if rfd < 0 { + let e = last_crt_error_to_py(None); + CloseHandle(read); + CloseHandle(write); + return Err(e); + } + let wfd = + crt::_open_osfhandle(write as crt::intptr_t, crt::O_WRONLY | crt::O_NOINHERIT); + if wfd < 0 { + let e = last_crt_error_to_py(None); + crt::_close(rfd); // closes `read` (the fd owns it) + CloseHandle(write); + return Err(e); + } + Ok(Object::new_tuple(vec![ + Object::Int(i64::from(rfd)), + Object::Int(i64::from(wfd)), + ])) + } + } + #[cfg(not(any(unix, windows)))] + { + Err(crate::error::not_implemented_error( + "os.pipe() is only implemented on POSIX in WeavePy", + )) + } +} + +// POSIX-only (no pty on NT); the registration is `#[cfg(unix)]`. +#[cfg(unix)] fn os_openpty(_args: &[Object]) -> Result { - #[cfg(unix)] { let mut master: libc::c_int = -1; let mut slave: libc::c_int = -1; @@ -3769,12 +4303,6 @@ fn os_openpty(_args: &[Object]) -> Result { Object::Int(i64::from(slave)), ])) } - #[cfg(not(unix))] - { - Err(crate::error::not_implemented_error( - "os.openpty() is only implemented on POSIX in WeavePy", - )) - } } /// `os.login_tty(fd)` — make `fd` the controlling terminal and the new @@ -3838,7 +4366,27 @@ fn os_dup(args: &[Object]) -> Result { } Ok(Object::Int(i64::from(new))) } - #[cfg(not(unix))] + // Windows: CRT `_dup`, then clear the duplicate handle's inheritance + // flag — CPython's `os.dup` goes through `_Py_dup`, which makes the new + // descriptor non-inheritable (PEP 446). `_dup` itself duplicates the + // handle *inheritable*, so the explicit clear is load-bearing. + #[cfg(windows)] + { + use crate::stdlib::nt_support::{crt, last_crt_error_to_py, last_win32_error_to_py}; + use windows_sys::Win32::Foundation::{SetHandleInformation, HANDLE_FLAG_INHERIT}; + let new = unsafe { crt::_dup(fd) }; + if new < 0 { + return Err(last_crt_error_to_py(None)); + } + let handle = unsafe { crt::_get_osfhandle(new) }; + if unsafe { SetHandleInformation(handle as *mut std::ffi::c_void, HANDLE_FLAG_INHERIT, 0) } + == 0 + { + return Err(last_win32_error_to_py(None)); + } + Ok(Object::Int(i64::from(new))) + } + #[cfg(not(any(unix, windows)))] { let _ = fd; Err(crate::error::not_implemented_error( @@ -3886,7 +4434,25 @@ fn os_dup2(args: &[Object], kwargs: &[(String, Object)]) -> Result Result { } Ok(Object::Int(off as i64)) } - #[cfg(not(unix))] + // Windows: the CRT's 64-bit seek (`_lseeki64`), CPython's `os_lseek_impl`. + #[cfg(windows)] + { + use crate::stdlib::nt_support::{crt, last_crt_error_to_py}; + let off = unsafe { crt::_lseeki64(fd, pos, how) }; + if off < 0 { + return Err(last_crt_error_to_py(None)); + } + Ok(Object::Int(off)) + } + #[cfg(not(any(unix, windows)))] { let _ = (fd, pos, how); Err(crate::error::not_implemented_error( @@ -3966,7 +4542,37 @@ fn os_truncate(args: &[Object]) -> Result { } Ok(Object::None) } - #[cfg(not(unix))] + // Windows has no path `truncate(2)`: CPython opens the file write-only + // and sizes it with `_chsize_s` (posixmodule.c `os_truncate_impl` under + // `MS_WINDOWS`). + #[cfg(windows)] + { + use crate::stdlib::nt_support::{crt, crt_error_to_py, wide}; + if p.as_bytes().contains(&0) { + return Err(value_error("embedded null byte")); + } + let wpath = wide(&p); + let mut fd: i32 = -1; + let err = unsafe { + crt::_wsopen_s( + &raw mut fd, + wpath.as_ptr(), + crt::O_WRONLY | crt::O_BINARY | crt::O_NOINHERIT, + crt::SH_DENYNO, + 0, + ) + }; + if err != 0 { + return Err(crt_error_to_py(err, Some(&p))); + } + let rc = unsafe { crt::_chsize_s(fd, length) }; + unsafe { crt::_close(fd) }; + if rc != 0 { + return Err(crt_error_to_py(rc, Some(&p))); + } + Ok(Object::None) + } + #[cfg(not(any(unix, windows)))] { let _ = (p, length); Err(crate::error::not_implemented_error( @@ -4009,7 +4615,18 @@ fn os_ftruncate(args: &[Object]) -> Result { } Ok(Object::None) } - #[cfg(not(unix))] + // Windows: `_chsize_s` (CPython's `os_ftruncate_impl`); it returns the + // errno directly rather than setting the TLS `errno`. + #[cfg(windows)] + { + use crate::stdlib::nt_support::{crt, crt_error_to_py}; + let rc = unsafe { crt::_chsize_s(fd, length) }; + if rc != 0 { + return Err(crt_error_to_py(rc, None)); + } + Ok(Object::None) + } + #[cfg(not(any(unix, windows)))] { let _ = (fd, length); Err(crate::error::not_implemented_error( @@ -4036,7 +4653,24 @@ fn os_get_inheritable(args: &[Object]) -> Result { } Ok(Object::Bool(flags & libc::FD_CLOEXEC == 0)) } - #[cfg(not(unix))] + // Windows: inheritance lives on the *handle* — CPython's + // `_Py_get_inheritable` reads `GetHandleInformation`'s + // `HANDLE_FLAG_INHERIT` bit for the fd's OS handle. + #[cfg(windows)] + { + use crate::stdlib::nt_support::{crt, crt_error_to_py, last_win32_error_to_py}; + use windows_sys::Win32::Foundation::{GetHandleInformation, HANDLE_FLAG_INHERIT}; + let handle = unsafe { crt::_get_osfhandle(fd) }; + if handle == -1 || handle == -2 { + return Err(crt_error_to_py(crate::py_errno::EBADF, None)); + } + let mut flags: u32 = 0; + if unsafe { GetHandleInformation(handle as _, &raw mut flags) } == 0 { + return Err(last_win32_error_to_py(None)); + } + Ok(Object::Bool(flags & HANDLE_FLAG_INHERIT != 0)) + } + #[cfg(not(any(unix, windows)))] { let _ = fd; Err(crate::error::not_implemented_error( @@ -4078,7 +4712,23 @@ fn os_set_inheritable(args: &[Object]) -> Result { } Ok(Object::None) } - #[cfg(not(unix))] + // Windows: `SetHandleInformation(HANDLE_FLAG_INHERIT, …)` on the fd's + // handle (CPython's `_Py_set_inheritable`). + #[cfg(windows)] + { + use crate::stdlib::nt_support::{crt, crt_error_to_py, last_win32_error_to_py}; + use windows_sys::Win32::Foundation::{SetHandleInformation, HANDLE_FLAG_INHERIT}; + let handle = unsafe { crt::_get_osfhandle(fd) }; + if handle == -1 || handle == -2 { + return Err(crt_error_to_py(crate::py_errno::EBADF, None)); + } + let flag = if inheritable { HANDLE_FLAG_INHERIT } else { 0 }; + if unsafe { SetHandleInformation(handle as _, HANDLE_FLAG_INHERIT, flag) } == 0 { + return Err(last_win32_error_to_py(None)); + } + Ok(Object::None) + } + #[cfg(not(any(unix, windows)))] { let _ = (fd, inheritable); Err(crate::error::not_implemented_error( @@ -4097,7 +4747,14 @@ fn os_isatty(args: &[Object]) -> Result { let r = unsafe { libc::isatty(fd as i32) }; Ok(Object::Bool(r != 0)) } - #[cfg(not(unix))] + // Windows: the CRT's `_isatty` (true for any character device — console, + // NUL — exactly like CPython's `os_isatty_impl`). + #[cfg(windows)] + { + let r = unsafe { crate::stdlib::nt_support::crt::_isatty(fd as i32) }; + Ok(Object::Bool(r != 0)) + } + #[cfg(not(any(unix, windows)))] { let _ = fd; Ok(Object::Bool(false)) @@ -4136,7 +4793,26 @@ fn os_device_encoding(args: &[Object]) -> Result { Ok(Object::from_str(codeset)) } } - #[cfg(not(unix))] + // Windows: CPython's `_Py_device_encoding` — `None` for a non-tty; for a + // console fd, `'cp%d'` of the input code page on fd 0 and the output + // code page on fds 1/2. + #[cfg(windows)] + { + use windows_sys::Win32::System::Console::{GetConsoleCP, GetConsoleOutputCP}; + if unsafe { crate::stdlib::nt_support::crt::_isatty(fd) } == 0 { + return Ok(Object::None); + } + let cp = match fd { + 0 => unsafe { GetConsoleCP() }, + 1 | 2 => unsafe { GetConsoleOutputCP() }, + _ => 0, + }; + if cp == 0 { + return Ok(Object::None); + } + Ok(Object::from_str(format!("cp{cp}"))) + } + #[cfg(not(any(unix, windows)))] { let _ = fd; Ok(Object::None) @@ -4183,7 +4859,26 @@ fn os_read(args: &[Object]) -> Result { return Ok(Object::new_bytes(buf)); } } - #[cfg(not(unix))] + // Windows: the CRT's `_read` on the fd (CPython's `os_read_impl` → + // `_Py_read`). The count parameter is 32-bit, so clamp a larger request + // like `_PY_READ_MAX`; a short read is normal and the caller loops. + #[cfg(windows)] + { + let mut buf = vec![0u8; n]; + let want = u32::try_from(n.min(i32::MAX as usize)).expect("clamped to i32::MAX"); + let ptr = buf.as_mut_ptr(); + // Release the GIL like the Unix arm: a pipe read can block + // indefinitely and peer threads must keep running. + let r = crate::gil::allow_threads_then(|| unsafe { + crate::stdlib::nt_support::crt::_read(fd, ptr.cast(), want) + }); + if r < 0 { + return Err(crate::stdlib::nt_support::last_crt_error_to_py(None)); + } + buf.truncate(r as usize); + Ok(Object::new_bytes(buf)) + } + #[cfg(not(any(unix, windows)))] { let _ = (fd, n); Err(crate::error::not_implemented_error( @@ -4254,7 +4949,21 @@ fn os_write(args: &[Object]) -> Result { return Ok(Object::Int(r as i64)); } } - #[cfg(not(unix))] + // Windows: the CRT's `_write` (CPython's `os_write_impl` → `_Py_write`). + // 32-bit count: a longer buffer is written partially and the caller's + // write loop (io, subprocess) resumes from the returned count. + #[cfg(windows)] + { + let want = u32::try_from(data.len().min(i32::MAX as usize)).expect("clamped to i32::MAX"); + let r = crate::gil::allow_threads_then(|| unsafe { + crate::stdlib::nt_support::crt::_write(fd, data.as_ptr().cast(), want) + }); + if r < 0 { + return Err(crate::stdlib::nt_support::last_crt_error_to_py(None)); + } + Ok(Object::Int(i64::from(r))) + } + #[cfg(not(any(unix, windows)))] { let _ = (fd, data); Err(crate::error::not_implemented_error( @@ -4336,7 +5045,50 @@ fn os_times(args: &[Object]) -> Result { )) } -#[cfg(not(unix))] +/// Windows `os.times` — CPython's `os_times_impl` under `MS_WINDOWS`: +/// `GetProcessTimes` kernel/user FILETIMEs (100ns units) for `system`/`user`; +/// the children and elapsed slots are 0 (NT doesn't aggregate child times). +#[cfg(windows)] +fn os_times(args: &[Object]) -> Result { + use windows_sys::Win32::Foundation::FILETIME; + use windows_sys::Win32::System::Threading::{GetCurrentProcess, GetProcessTimes}; + require_no_args(args, "times")?; + let zero = FILETIME { + dwLowDateTime: 0, + dwHighDateTime: 0, + }; + let (mut create, mut exit, mut kernel, mut user) = (zero, zero, zero, zero); + // SAFETY: the pseudo-handle from GetCurrentProcess is always valid. + let ok = unsafe { + GetProcessTimes( + GetCurrentProcess(), + &raw mut create, + &raw mut exit, + &raw mut kernel, + &raw mut user, + ) + }; + if ok == 0 { + return Err(crate::stdlib::nt_support::last_win32_error_to_py(None)); + } + let secs = |ft: &FILETIME| { + let ticks = (u64::from(ft.dwHighDateTime) << 32) | u64::from(ft.dwLowDateTime); + ticks as f64 * 1e-7 + }; + Ok(struct_seq_instance( + times_result_type(), + &TIMES_FIELDS, + vec![ + Object::Float(secs(&user)), + Object::Float(secs(&kernel)), + Object::Float(0.0), + Object::Float(0.0), + Object::Float(0.0), + ], + )) +} + +#[cfg(not(any(unix, windows)))] fn os_times(args: &[Object]) -> Result { require_no_args(args, "times")?; let zero = || Object::Float(0.0); @@ -4379,7 +5131,36 @@ fn os_get_terminal_size(args: &[Object]) -> Result { i64::from(ws.ws_row), )) } - #[cfg(not(unix))] + // Windows: `GetConsoleScreenBufferInfo` on the fd's handle, raising + // `OSError` when it isn't a console (CPython's `os_get_terminal_size_impl` + // — the frozen `shutil.get_terminal_size` catches that and falls back). + #[cfg(windows)] + { + use crate::stdlib::nt_support::{crt, crt_error_to_py, last_win32_error_to_py}; + use windows_sys::Win32::System::Console::{ + GetConsoleScreenBufferInfo, CONSOLE_SCREEN_BUFFER_INFO, + }; + let fd = match args.first() { + Some(Object::Int(n)) => *n as i32, + Some(Object::Bool(b)) => i32::from(*b), + None | Some(Object::None) => 1, // stdout + _ => return Err(type_error("an integer is required")), + }; + let handle = unsafe { crt::_get_osfhandle(fd) }; + if handle == -1 || handle == -2 { + return Err(crt_error_to_py(crate::py_errno::EBADF, None)); + } + // SAFETY: `info` is plain-old-data filled by the call on success. + let mut info: CONSOLE_SCREEN_BUFFER_INFO = unsafe { std::mem::zeroed() }; + if unsafe { GetConsoleScreenBufferInfo(handle as _, &raw mut info) } == 0 { + return Err(last_win32_error_to_py(None)); + } + Ok(make_terminal_size( + i64::from(info.srWindow.Right - info.srWindow.Left + 1), + i64::from(info.srWindow.Bottom - info.srWindow.Top + 1), + )) + } + #[cfg(not(any(unix, windows)))] { let _ = args; Ok(make_terminal_size(80, 24)) @@ -4408,28 +5189,18 @@ fn os_get_exec_path(_args: &[Object]) -> Result { Ok(Object::new_list(parts)) } +// POSIX-only surface (the registrations are `#[cfg(unix)]`; CPython's `nt` +// module has no uid/gid notion at all). +#[cfg(unix)] fn os_getuid(args: &[Object]) -> Result { require_no_args(args, "getuid")?; - #[cfg(unix)] - { - Ok(Object::Int(i64::from(unsafe { libc::getuid() }))) - } - #[cfg(not(unix))] - { - Ok(Object::Int(0)) - } + Ok(Object::Int(i64::from(unsafe { libc::getuid() }))) } +#[cfg(unix)] fn os_getgid(args: &[Object]) -> Result { require_no_args(args, "getgid")?; - #[cfg(unix)] - { - Ok(Object::Int(i64::from(unsafe { libc::getgid() }))) - } - #[cfg(not(unix))] - { - Ok(Object::Int(0)) - } + Ok(Object::Int(i64::from(unsafe { libc::getgid() }))) } /// Shared id-converter for the `set*id` family. CPython routes these through @@ -4552,7 +5323,18 @@ fn os_umask(args: &[Object]) -> Result { let old = unsafe { libc::umask(mask as libc::mode_t) }; Ok(Object::Int(i64::from(old))) } - #[cfg(not(unix))] + // Windows: CPython exposes `os.umask` via the CRT's `_umask` (only the + // `_S_IWRITE` bit is meaningful there, but the returned previous mask + // must round-trip). + #[cfg(windows)] + { + unsafe extern "C" { + fn _umask(pmode: i32) -> i32; + } + let old = unsafe { _umask(mask as i32) }; + Ok(Object::Int(i64::from(old))) + } + #[cfg(not(any(unix, windows)))] { let _ = mask; Ok(Object::Int(0)) @@ -4582,7 +5364,31 @@ fn os_symlink(args: &[Object], kwargs: &[(String, Object)]) -> Result false, + Some(Object::Bool(b)) => *b, + Some(Object::Int(n)) => *n != 0, + Some(_) => return Err(type_error("symlink() target_is_directory must be bool")), + }; + let res = if target_is_directory { + std::os::windows::fs::symlink_dir(&src, &dst) + } else { + std::os::windows::fs::symlink_file(&src, &dst) + }; + res.map_err(|e| crate::error::io_error_to_py_named2(&e, Some(&src), Some(&dst)))?; + Ok(Object::None) + } + #[cfg(not(any(unix, windows)))] { let _ = (src, dst); Err(crate::error::not_implemented_error( @@ -4605,7 +5411,8 @@ fn os_link(args: &[Object]) -> Result { /// best-effort `lchmod` behaviour on Linux). /// `os.fchmod(fd, mode)` — change the permission bits of an open file /// descriptor (`posix.fchmod`; `test_posix.test_fchmod_file`). A thin -/// wrapper over `fchmod(2)`. +/// wrapper over `fchmod(2)`. Unix-only, like CPython (`HAVE_FCHMOD`). +#[cfg(unix)] fn os_fchmod(args: &[Object]) -> Result { let fd = match args.first() { Some(Object::Int(n)) => *n, @@ -4615,29 +5422,24 @@ fn os_fchmod(args: &[Object]) -> Result { Some(Object::Int(m)) => *m, _ => return Err(type_error("fchmod() mode must be int")), }; - #[cfg(unix)] - { - // SAFETY: plain syscall on a caller-supplied descriptor. - let rc = unsafe { libc::fchmod(fd as libc::c_int, mode as libc::mode_t) }; - if rc != 0 { - return Err(crate::error::io_error_to_py( - &std::io::Error::last_os_error(), - )); - } - Ok(Object::None) - } - #[cfg(not(unix))] - { - let _ = (fd, mode); - Err(crate::error::not_implemented_error("fchmod is POSIX-only")) + // SAFETY: plain syscall on a caller-supplied descriptor. + let rc = unsafe { libc::fchmod(fd as libc::c_int, mode as libc::mode_t) }; + if rc != 0 { + return Err(crate::error::io_error_to_py( + &std::io::Error::last_os_error(), + )); } + Ok(Object::None) } fn os_chmod(args: &[Object], kwargs: &[(String, Object)]) -> Result { reject_dir_fd(kwargs, "chmod")?; // CPython's `os.chmod` accepts an open file descriptor in place of a path // and dispatches to `fchmod(2)` (`test_posix.test_fchmod_file` calls - // `posix.chmod(fd, mode)`). + // `posix.chmod(fd, mode)`) — but only where `HAVE_FCHMOD`; on Windows the + // path converter rejects the fd form, so an int falls through to the path + // conversion below and raises `TypeError` there, matching CPython. + #[cfg(unix)] if let Some(Object::Int(_)) = args.first() { return os_fchmod(args); } @@ -4679,7 +5481,25 @@ fn os_chmod(args: &[Object], kwargs: &[(String, Object)]) -> Result Result> 32) as u32, + } + }; + let (aft, mft) = if let Some(ns_obj) = ns { + let (a, m) = utime_pair_int(&ns_obj, "ns")?; + (to_filetime(a), to_filetime(m)) + } else if let Some(t_obj) = times { + let (a, m) = utime_pair_float(&t_obj, "times")?; + (to_filetime((a * 1e9) as i64), to_filetime((m * 1e9) as i64)) + } else { + // SAFETY: plain out-param fill. + let mut now = FILETIME { + dwLowDateTime: 0, + dwHighDateTime: 0, + }; + unsafe { GetSystemTimeAsFileTime(&raw mut now) }; + (now, now) + }; + let mut flags = FILE_FLAG_BACKUP_SEMANTICS; + if !dir_entry_follow(kwargs) { + flags |= FILE_FLAG_OPEN_REPARSE_POINT; + } + if p.as_bytes().contains(&0) { + return Err(value_error("embedded null character in path")); + } + let wpath = wide(&p); + // SAFETY: `wpath` outlives the call; the handle is closed on every path. + let handle = unsafe { + CreateFileW( + wpath.as_ptr(), + FILE_WRITE_ATTRIBUTES, + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, + std::ptr::null(), + OPEN_EXISTING, + flags, + std::ptr::null_mut(), + ) + }; + if handle == INVALID_HANDLE_VALUE { + return Err(last_win32_error_to_py(Some(&p))); + } + let ok = unsafe { SetFileTime(handle, std::ptr::null(), &raw const aft, &raw const mft) }; + let err = if ok == 0 { + Some(last_win32_error_to_py(Some(&p))) + } else { + None + }; + unsafe { CloseHandle(handle) }; + match err { + Some(e) => Err(e), + None => Ok(Object::None), + } + } + #[cfg(not(any(unix, windows)))] { let _ = (times, ns); std::fs::metadata(&p).map_err(|e| crate::error::io_error_to_py(&e))?; @@ -4768,7 +5661,7 @@ fn reject_dir_fd(kwargs: &[(String, Object)], func: &str) -> Result<(), RuntimeE /// Split a 2-element `(atime, mtime)` int/tuple-or-list into a pair of i64 /// nanoseconds for `os.utime(ns=…)`. -#[cfg(unix)] +#[cfg(any(unix, windows))] fn utime_pair_int(o: &Object, name: &str) -> Result<(i64, i64), RuntimeError> { let (a, b) = utime_pair(o, name)?; let to_i = |x: &Object| { @@ -4780,7 +5673,7 @@ fn utime_pair_int(o: &Object, name: &str) -> Result<(i64, i64), RuntimeError> { /// Split a 2-element `(atime, mtime)` float-seconds tuple-or-list for /// `os.utime(times=…)`. -#[cfg(unix)] +#[cfg(any(unix, windows))] fn utime_pair_float(o: &Object, name: &str) -> Result<(f64, f64), RuntimeError> { let (a, b) = utime_pair(o, name)?; let to_f = |x: &Object| { @@ -4792,7 +5685,7 @@ fn utime_pair_float(o: &Object, name: &str) -> Result<(f64, f64), RuntimeError> Ok((to_f(&a)?, to_f(&b)?)) } -#[cfg(unix)] +#[cfg(any(unix, windows))] fn utime_pair(o: &Object, name: &str) -> Result<(Object, Object), RuntimeError> { // CPython requires a *tuple* of exactly two items for both `times` and `ns` // — a list (or any other sequence) raises TypeError, and a wrong arity too @@ -4826,6 +5719,342 @@ fn secs_to_timespec(s: f64) -> libc::timespec { } } +// --------------------------------------------------------------------------- +// RFC 0063 WS1 — the NT-only `os`/`nt` surface (posixmodule.c, MS_WINDOWS). +// --------------------------------------------------------------------------- + +/// `os.getlogin()` on Windows — `GetUserNameW` (CPython's `os_getlogin_impl` +/// under `MS_WINDOWS`; the POSIX branch reads the controlling tty instead). +#[cfg(windows)] +fn os_getlogin(args: &[Object]) -> Result { + use windows_sys::Win32::System::WindowsProgramming::GetUserNameW; + require_no_args(args, "getlogin")?; + // UNLEN (256) + NUL, the buffer CPython sizes too. + let mut buf = [0u16; 257]; + let mut len = buf.len() as u32; + // SAFETY: `len` tells the API the buffer capacity; it returns the + // written length including the terminator. + if unsafe { GetUserNameW(buf.as_mut_ptr(), &raw mut len) } == 0 { + return Err(crate::stdlib::nt_support::last_win32_error_to_py(None)); + } + let n = len.saturating_sub(1) as usize; + Ok(Object::from_str(crate::stdlib::nt_support::from_wide( + &buf[..n], + ))) +} + +/// `os.startfile(filepath, operation='open', arguments='', cwd=None, +/// show_cmd=1)` — `ShellExecuteW`, mirroring CPython's `os_startfile_impl`. +#[cfg(windows)] +fn os_startfile(args: &[Object], kwargs: &[(String, Object)]) -> Result { + use crate::stdlib::nt_support::wide; + use windows_sys::Win32::UI::Shell::ShellExecuteW; + let path = path_arg_or_kw(args, 0, "filepath", kwargs, "startfile")?; + let kw = |name: &str| { + kwargs + .iter() + .find(|(k, _)| k == name) + .map(|(_, v)| v.clone()) + }; + let str_arg = |o: Option, what: &str, default: &str| match o { + None | Some(Object::None) => Ok(default.to_owned()), + Some(Object::Str(s)) => Ok(s.to_string()), + Some(other) => Err(type_error(format!( + "startfile() {what} must be str, not {}", + other.type_name() + ))), + }; + let operation = str_arg( + args.get(1).cloned().or_else(|| kw("operation")), + "operation", + "open", + )?; + let arguments = str_arg( + args.get(2).cloned().or_else(|| kw("arguments")), + "arguments", + "", + )?; + let cwd = match args.get(3).cloned().or_else(|| kw("cwd")) { + None | Some(Object::None) => None, + Some(o) => Some(path_to_string(&o, "startfile")?), + }; + let show_cmd = match args.get(4).cloned().or_else(|| kw("show_cmd")) { + None | Some(Object::None) => 1, + Some(o) => { + o.as_i64() + .ok_or_else(|| type_error("startfile() show_cmd must be int"))? as i32 + } + }; + let wpath = wide(&path); + let wop = wide(&operation); + let wargs = (!arguments.is_empty()).then(|| wide(&arguments)); + let wcwd = cwd.as_deref().map(wide); + // SAFETY: every wide buffer outlives the call; NULL selects the default. + let rc = unsafe { + ShellExecuteW( + std::ptr::null_mut(), + wop.as_ptr(), + wpath.as_ptr(), + wargs.as_ref().map_or(std::ptr::null(), |w| w.as_ptr()), + wcwd.as_ref().map_or(std::ptr::null(), |w| w.as_ptr()), + show_cmd, + ) + }; + // The fake-HINSTANCE result encodes failure as a value <= 32, with the + // real Win32 error in `GetLastError` — exactly what CPython checks. + if rc as isize <= 32 { + return Err(crate::stdlib::nt_support::last_win32_error_to_py(Some( + &path, + ))); + } + Ok(Object::None) +} + +/// `os.fsync(fd)` on Windows — the CRT's `_commit` (which is +/// `FlushFileBuffers` on the fd's handle), CPython's `os_fsync_impl`. +#[cfg(windows)] +fn os_fsync(args: &[Object]) -> Result { + let fd = match args.first() { + Some(Object::Int(i)) => *i as i32, + Some(Object::Bool(b)) => { + warn_bool_as_fd()?; + i32::from(*b) + } + _ => return Err(type_error("fsync() arg must be int")), + }; + let rc = unsafe { crate::stdlib::nt_support::crt::_commit(fd) }; + if rc != 0 { + return Err(crate::stdlib::nt_support::last_crt_error_to_py(None)); + } + Ok(Object::None) +} + +/// Resolve an NT path helper argument preserving the `str`/`bytes` flavour +/// (these mirror CPython's `path_t`-converted `nt._get*` helpers, which +/// return the same type they were given). +#[cfg(windows)] +fn nt_path_arg(args: &[Object], func: &str) -> Result<(String, bool), RuntimeError> { + let obj = args + .first() + .ok_or_else(|| type_error(format!("{func}() requires a path argument")))?; + let resolved = resolve_fspath_obj(obj, func)?; + let want_bytes = matches!(resolved, Object::Bytes(_)); + let p = match &resolved { + Object::Str(s) => s.to_string(), + Object::Bytes(b) => String::from_utf8_lossy(b).into_owned(), + _ => unreachable!("resolve_fspath_obj returns str/bytes"), + }; + if p.as_bytes().contains(&0) { + return Err(value_error("embedded null character")); + } + Ok((p, want_bytes)) +} + +/// Re-encode an NT path helper result in the caller's flavour. +#[cfg(windows)] +fn nt_path_result(s: String, want_bytes: bool) -> Object { + if want_bytes { + Object::new_bytes(s.into_bytes()) + } else { + Object::from_str(s) + } +} + +/// `nt._getfullpathname(path)` — `GetFullPathNameW`; `ntpath.abspath`'s fast +/// path (the pure-Python fallback only runs when this name is missing). +#[cfg(windows)] +fn nt_getfullpathname(args: &[Object]) -> Result { + use crate::stdlib::nt_support::{from_wide, last_win32_error_to_py, wide}; + use windows_sys::Win32::Storage::FileSystem::GetFullPathNameW; + let (p, want_bytes) = nt_path_arg(args, "_getfullpathname")?; + let wpath = wide(&p); + let mut buf = vec![0u16; 1024]; + loop { + // SAFETY: the out-buffer is sized by `buf`; a return value larger + // than the capacity is the needed size (retry), 0 is failure. + let n = unsafe { + GetFullPathNameW( + wpath.as_ptr(), + buf.len() as u32, + buf.as_mut_ptr(), + std::ptr::null_mut(), + ) + }; + if n == 0 { + return Err(last_win32_error_to_py(Some(&p))); + } + if (n as usize) <= buf.len() { + return Ok(nt_path_result(from_wide(&buf[..n as usize]), want_bytes)); + } + buf.resize(n as usize, 0); + } +} + +/// `nt._getfinalpathname(path)` — open the file (backup semantics so +/// directories work) and ask `GetFinalPathNameByHandleW` for the resolved +/// DOS-style name; `ntpath.realpath`'s primary resolution step. +#[cfg(windows)] +fn nt_getfinalpathname(args: &[Object]) -> Result { + use crate::stdlib::nt_support::{from_wide, last_win32_error_to_py, wide}; + use windows_sys::Win32::Foundation::{CloseHandle, INVALID_HANDLE_VALUE}; + use windows_sys::Win32::Storage::FileSystem::{ + CreateFileW, GetFinalPathNameByHandleW, FILE_FLAG_BACKUP_SEMANTICS, FILE_SHARE_DELETE, + FILE_SHARE_READ, FILE_SHARE_WRITE, OPEN_EXISTING, + }; + let (p, want_bytes) = nt_path_arg(args, "_getfinalpathname")?; + let wpath = wide(&p); + // SAFETY: `wpath` outlives the call; the handle is closed on every path. + let handle = unsafe { + CreateFileW( + wpath.as_ptr(), + 0, // attribute access only + FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, + std::ptr::null(), + OPEN_EXISTING, + FILE_FLAG_BACKUP_SEMANTICS, + std::ptr::null_mut(), + ) + }; + if handle == INVALID_HANDLE_VALUE { + return Err(last_win32_error_to_py(Some(&p))); + } + let mut buf = vec![0u16; 1024]; + loop { + // 0 = FILE_NAME_NORMALIZED | VOLUME_NAME_DOS, CPython's flags. + let n = unsafe { GetFinalPathNameByHandleW(handle, buf.as_mut_ptr(), buf.len() as u32, 0) }; + if n == 0 { + let e = last_win32_error_to_py(Some(&p)); + unsafe { CloseHandle(handle) }; + return Err(e); + } + if (n as usize) <= buf.len() { + unsafe { CloseHandle(handle) }; + return Ok(nt_path_result(from_wide(&buf[..n as usize]), want_bytes)); + } + buf.resize(n as usize, 0); + } +} + +/// `nt._getvolumepathname(path)` — `GetVolumePathNameW`, the mount point of +/// the volume containing `path` (`ntpath.ismount`). +#[cfg(windows)] +fn nt_getvolumepathname(args: &[Object]) -> Result { + use crate::stdlib::nt_support::{from_wide_nul, last_win32_error_to_py, wide}; + use windows_sys::Win32::Storage::FileSystem::GetVolumePathNameW; + let (p, want_bytes) = nt_path_arg(args, "_getvolumepathname")?; + let wpath = wide(&p); + // The mount point is never longer than the input path; CPython sizes the + // buffer the same way (with a MAX_PATH floor). + let mut buf = vec![0u16; wpath.len().max(260)]; + // SAFETY: the out-buffer is sized by `buf`. + if unsafe { GetVolumePathNameW(wpath.as_ptr(), buf.as_mut_ptr(), buf.len() as u32) } == 0 { + return Err(last_win32_error_to_py(Some(&p))); + } + Ok(nt_path_result(from_wide_nul(&buf), want_bytes)) +} + +/// `nt._getdiskusage(path)` — `GetDiskFreeSpaceExW`, returning the +/// `(total, free)` pair the frozen `shutil.disk_usage` expects on nt. +#[cfg(windows)] +fn nt_getdiskusage(args: &[Object]) -> Result { + use crate::stdlib::nt_support::{last_win32_error_to_py, wide}; + use windows_sys::Win32::Storage::FileSystem::GetDiskFreeSpaceExW; + let (p, _) = nt_path_arg(args, "_getdiskusage")?; + let wpath = wide(&p); + let (mut avail, mut total, mut free) = (0u64, 0u64, 0u64); + // SAFETY: three plain out-params. + let ok = unsafe { + GetDiskFreeSpaceExW( + wpath.as_ptr(), + &raw mut avail, + &raw mut total, + &raw mut free, + ) + }; + if ok == 0 { + return Err(last_win32_error_to_py(Some(&p))); + } + Ok(Object::new_tuple(vec![ + Object::Int(total as i64), + Object::Int(free as i64), + ])) +} + +/// The `(drive_end, root_end)` byte offsets of `ntpath.splitroot(p)`. All +/// decision bytes are ASCII (`\\ / : ? u n c`), so the offsets always land +/// on UTF-8 boundaries and the caller can slice either flavour with them. +/// Port of posixmodule.c's `os__path_splitroot_ex_impl`. +#[cfg(windows)] +fn nt_splitroot_indices(s: &[u8]) -> (usize, usize) { + let is_sep = |b: u8| b == b'\\' || b == b'/'; + if s.first().copied().is_some_and(is_sep) { + if s.get(1).copied().is_some_and(is_sep) { + // UNC (`\\server\share`) or extended UNC (`\\?\UNC\server\share`): + // the drive runs through the share component. + let start = if s.len() >= 8 + && s[2] == b'?' + && is_sep(s[3]) + && s[4].eq_ignore_ascii_case(&b'u') + && s[5].eq_ignore_ascii_case(&b'n') + && s[6].eq_ignore_ascii_case(&b'c') + && is_sep(s[7]) + { + 8 + } else { + 2 + }; + let Some(index) = (start..s.len()).find(|&i| is_sep(s[i])) else { + return (s.len(), s.len()); + }; + let Some(index2) = (index + 1..s.len()).find(|&i| is_sep(s[i])) else { + return (s.len(), s.len()); + }; + (index2, index2 + 1) + } else { + // Relative to the current drive's root (`\path`). + (0, 1) + } + } else if s.get(1) == Some(&b':') { + if s.get(2).copied().is_some_and(is_sep) { + (2, 3) // absolute drive path (`C:\path`) + } else { + (2, 2) // drive-relative (`C:path`) + } + } else { + (0, 0) + } +} + +/// `nt._path_splitroot_ex(path)` → `(drive, root, tail)`, preserving the +/// argument's `str`/`bytes` flavour; `ntpath.splitroot`'s fast path. +#[cfg(windows)] +fn nt_path_splitroot_ex(args: &[Object]) -> Result { + let obj = args + .first() + .ok_or_else(|| type_error("_path_splitroot_ex() requires a path argument"))?; + let resolved = resolve_fspath_obj(obj, "_path_splitroot_ex")?; + match &resolved { + Object::Str(s) => { + let full = s.to_string(); + let (d, r) = nt_splitroot_indices(full.as_bytes()); + Ok(Object::new_tuple(vec![ + Object::from_str(full[..d].to_owned()), + Object::from_str(full[d..r].to_owned()), + Object::from_str(full[r..].to_owned()), + ])) + } + Object::Bytes(b) => { + let (d, r) = nt_splitroot_indices(b); + Ok(Object::new_tuple(vec![ + Object::new_bytes(b[..d].to_vec()), + Object::new_bytes(b[d..r].to_vec()), + Object::new_bytes(b[r..].to_vec()), + ])) + } + _ => unreachable!("resolve_fspath_obj returns str/bytes"), + } +} + /// The process-wide `os.PathLike` ABC type. Memoised so its identity is /// stable across module rebuilds and so `isinstance(x, os.PathLike)` can /// recognise it (and apply the `__fspath__` structural check, like CPython's @@ -6315,4 +7544,43 @@ mod tests { assert_eq!(normpath_lexical("a/b/../c"), format!("a{sep}c")); assert_eq!(normpath_lexical("./"), "."); } + + // `os.makedirs`' split must be `ntpath.split` on Windows: sysconfig + // normpaths every install-scheme path to backslashes, so venv hands + // `makedirs` `{env}\Lib\site-packages` — a `/`-only split sees one + // giant leaf, skips parent creation, and the leaf `mkdir` dies with + // ERROR_PATH_NOT_FOUND (the RFC 0063 dist-check venv leg). + #[cfg(windows)] + #[test] + fn nt_split_mirrors_ntpath() { + assert_eq!( + nt_split(r"C:\venv\Lib\site-packages"), + (r"C:\venv\Lib", "site-packages") + ); + assert_eq!(nt_split(r"C:\venv/Lib"), (r"C:\venv", "Lib")); + assert_eq!(nt_split(r"C:\x\"), (r"C:\x", "")); + assert_eq!(nt_split(r"C:\"), (r"C:\", "")); + assert_eq!(nt_split("C:x"), ("C:", "x")); + assert_eq!(nt_split("rel"), ("", "rel")); + assert_eq!(nt_split(r"a\b"), ("a", "b")); + assert_eq!( + nt_split(r"\\server\share\dir\f"), + (r"\\server\share\dir", "f") + ); + assert_eq!(nt_split(r"\\server\share"), (r"\\server\share", "")); + assert_eq!(nt_split(r"\\?\C:\x\y"), (r"\\?\C:\x", "y")); + } + + #[cfg(windows)] + #[test] + fn nt_splitdrive_mirrors_ntpath() { + assert_eq!(nt_splitdrive(r"C:\x"), ("C:", r"\x")); + assert_eq!( + nt_splitdrive(r"\\server\share\x"), + (r"\\server\share", r"\x") + ); + assert_eq!(nt_splitdrive(r"\\?\C:\x"), (r"\\?\C:", r"\x")); + assert_eq!(nt_splitdrive(r"\x\y"), ("", r"\x\y")); + assert_eq!(nt_splitdrive("rel"), ("", "rel")); + } } diff --git a/crates/weavepy-vm/src/stdlib/os_process.rs b/crates/weavepy-vm/src/stdlib/os_process.rs index 91501be6..4f694c11 100644 --- a/crates/weavepy-vm/src/stdlib/os_process.rs +++ b/crates/weavepy-vm/src/stdlib/os_process.rs @@ -6,21 +6,26 @@ //! `os` surface gaps (`environb`, `device_encoding`) that `test_os` //! probes. //! -//! Everything here is gated to `unix`; the non-POSIX arms raise -//! `NotImplementedError`, matching the existing `os` primitives in -//! `os.rs`. Tracks CPython 3.13's `posixmodule.c`. +//! The POSIX-only surface is gated to `unix` so those names don't exist in +//! the module dict elsewhere (RFC 0063: CPython-on-Windows exports none of +//! them). Windows gets its own arms for the portable subset plus the CRT +//! `spawnv` family. Tracks CPython 3.13's `posixmodule.c`. #![allow(clippy::unnecessary_wraps)] -use super::os::{builtin, builtin_kw}; +use super::os::builtin; #[cfg(unix)] +use super::os::builtin_kw; +#[cfg(any(unix, windows))] use crate::error::value_error; use crate::error::{type_error, RuntimeError}; use crate::object::{DictData, DictKey, Object}; -// Only the unix-gated helpers (`env_mapping_dict`, `environb_snapshot`) -// need these; an unconditional import trips `-D warnings` on Windows. -#[cfg(unix)] +// Only the unix/windows-gated helpers (`env_mapping_dict`, +// `environb_snapshot`) need these; an unconditional import trips +// `-D warnings` on other targets. +#[cfg(any(unix, windows))] use crate::sync::{Rc, RefCell}; +#[cfg(unix)] use parking_lot::Mutex; #[cfg(unix)] @@ -33,64 +38,106 @@ pub(super) fn register(d: &mut DictData) { d.insert(DictKey(Object::from_static($name)), builtin($name, $f)); }; } + #[cfg_attr(not(unix), allow(unused_macros))] macro_rules! reg_kw { ($name:literal, $f:expr) => { d.insert(DictKey(Object::from_static($name)), builtin_kw($name, $f)); }; } + #[cfg_attr(not(any(unix, windows)), allow(unused_macros))] macro_rules! con { ($name:literal, $v:expr) => { d.insert(DictKey(Object::from_static($name)), Object::Int($v)); }; } - // --- process creation / replacement --- - reg!("fork", os_fork); + // RFC 0063 WS1: everything POSIX-only is gated so the names simply do + // not exist in the `nt` module dict — CPython-on-Windows exports none of + // them, and code in the wild feature-detects with `hasattr(os, 'fork')` + // etc., so a raising stub would be worse than absence. + #[cfg(unix)] + { + // --- process creation / replacement --- + reg!("fork", os_fork); + reg!("execv", os_execv); + reg!("execve", os_execve); + reg!("execvp", os_execvp); + reg!("execvpe", os_execvpe); + reg_kw!("posix_spawn", os_posix_spawn); + reg_kw!("posix_spawnp", os_posix_spawnp); + reg_kw!("register_at_fork", register_at_fork_kw); + + // --- waiting --- + reg!("wait", os_wait); + reg!("wait3", os_wait3); + reg!("wait4", os_wait4); + + // --- W* status macros --- + reg!("WIFEXITED", w_ifexited); + reg!("WEXITSTATUS", w_exitstatus); + reg!("WIFSIGNALED", w_ifsignaled); + reg!("WTERMSIG", w_termsig); + reg!("WIFSTOPPED", w_ifstopped); + reg!("WSTOPSIG", w_stopsig); + reg!("WIFCONTINUED", w_ifcontinued); + reg!("WCOREDUMP", w_coredump); + + // --- process groups / sessions --- + reg!("setsid", os_setsid); + reg!("getsid", os_getsid); + reg!("setpgid", os_setpgid); + reg!("getpgid", os_getpgid); + reg!("getpgrp", os_getpgrp); + reg!("setpgrp", os_setpgrp); + reg!("tcgetpgrp", os_tcgetpgrp); + reg!("tcsetpgrp", os_tcsetpgrp); + reg!("killpg", os_killpg); + + // --- fd helpers / ids --- + reg!("pipe2", os_pipe2); + reg!("setuid", os_setuid); + reg!("setgid", os_setgid); + reg!("setegid", os_setegid); + reg!("seteuid", os_seteuid); + reg!("setgroups", os_setgroups); + + // `sched_yield` is `HAVE_SCHED_H` surface — absent on Windows. + reg!("sched_yield", os_sched_yield); + + // --- W* / wait option constants --- + con!("WUNTRACED", i64::from(WUNTRACED)); + con!("WCONTINUED", i64::from(WCONTINUED)); + + // --- posix_spawn file-action selectors (CPython's own enum, 0/1/2) --- + con!("POSIX_SPAWN_OPEN", 0); + con!("POSIX_SPAWN_CLOSE", 1); + con!("POSIX_SPAWN_DUP2", 2); + + // --- sysexits-style exit codes (``, absent on NT) --- + con!("EX_OK", 0); + con!("EX_USAGE", 64); + con!("EX_DATAERR", 65); + con!("EX_NOINPUT", 66); + con!("EX_NOUSER", 67); + con!("EX_NOHOST", 68); + con!("EX_UNAVAILABLE", 69); + con!("EX_SOFTWARE", 70); + con!("EX_OSERR", 71); + con!("EX_OSFILE", 72); + con!("EX_CANTCREAT", 73); + con!("EX_IOERR", 74); + con!("EX_TEMPFAIL", 75); + con!("EX_PROTOCOL", 76); + con!("EX_NOPERM", 77); + con!("EX_CONFIG", 78); + } + + // --- portable surface (real Windows arms below) --- reg!("_exit", os_exit_now); reg!("abort", os_abort); - reg!("execv", os_execv); - reg!("execve", os_execve); - reg!("execvp", os_execvp); - reg!("execvpe", os_execvpe); - reg_kw!("posix_spawn", os_posix_spawn); - reg_kw!("posix_spawnp", os_posix_spawnp); - reg_kw!("register_at_fork", register_at_fork_kw); - - // --- waiting --- - reg!("wait", os_wait); - reg!("wait3", os_wait3); - reg!("wait4", os_wait4); - - // --- W* status macros --- - reg!("WIFEXITED", w_ifexited); - reg!("WEXITSTATUS", w_exitstatus); - reg!("WIFSIGNALED", w_ifsignaled); - reg!("WTERMSIG", w_termsig); - reg!("WIFSTOPPED", w_ifstopped); - reg!("WSTOPSIG", w_stopsig); - reg!("WIFCONTINUED", w_ifcontinued); - reg!("WCOREDUMP", w_coredump); - - // --- process groups / sessions --- - reg!("setsid", os_setsid); - reg!("getsid", os_getsid); - reg!("setpgid", os_setpgid); - reg!("getpgid", os_getpgid); - reg!("getpgrp", os_getpgrp); - reg!("setpgrp", os_setpgrp); - reg!("tcgetpgrp", os_tcgetpgrp); - reg!("tcsetpgrp", os_tcsetpgrp); - reg!("killpg", os_killpg); - reg!("getppid", os_getppid); - - // --- fd helpers --- reg!("closerange", os_closerange); - reg!("pipe2", os_pipe2); - reg!("setuid", os_setuid); - reg!("setgid", os_setgid); - reg!("setegid", os_setegid); - reg!("seteuid", os_seteuid); - reg!("setgroups", os_setgroups); + reg!("getppid", os_getppid); + reg!("device_encoding", os_device_encoding); // --- affinity / scheduling --- // CPU affinity is a Linux-only surface; CPython doesn't expose @@ -102,14 +149,7 @@ pub(super) fn register(d: &mut DictData) { reg!("sched_getaffinity", os_sched_getaffinity); reg!("sched_setaffinity", os_sched_setaffinity); } - reg!("sched_yield", os_sched_yield); - - // --- small surface gaps test_os probes --- - reg!("device_encoding", os_device_encoding); - // --- W* / wait option constants --- - con!("WUNTRACED", i64::from(WUNTRACED)); - con!("WCONTINUED", i64::from(WCONTINUED)); #[cfg(target_os = "linux")] { con!("WEXITED", i64::from(libc::WEXITED)); @@ -120,11 +160,6 @@ pub(super) fn register(d: &mut DictData) { con!("P_PGID", i64::from(libc::P_PGID)); } - // --- posix_spawn file-action selectors (CPython's own enum, 0/1/2) --- - con!("POSIX_SPAWN_OPEN", 0); - con!("POSIX_SPAWN_CLOSE", 1); - con!("POSIX_SPAWN_DUP2", 2); - // --- dynamic-loader (`dlopen(3)`) mode flags --- // CPython's `posix`/`os` expose the `RTLD_*` bits used by `ctypes` and by // `sys.setdlopenflags`. Values are platform-specific, so source them from @@ -142,23 +177,19 @@ pub(super) fn register(d: &mut DictData) { con!("RTLD_DEEPBIND", i64::from(libc::RTLD_DEEPBIND)); } - // --- sysexits-style exit codes (CPython exposes these) --- - con!("EX_OK", 0); - con!("EX_USAGE", 64); - con!("EX_DATAERR", 65); - con!("EX_NOINPUT", 66); - con!("EX_NOUSER", 67); - con!("EX_NOHOST", 68); - con!("EX_UNAVAILABLE", 69); - con!("EX_SOFTWARE", 70); - con!("EX_OSERR", 71); - con!("EX_OSFILE", 72); - con!("EX_CANTCREAT", 73); - con!("EX_IOERR", 74); - con!("EX_TEMPFAIL", 75); - con!("EX_PROTOCOL", 76); - con!("EX_NOPERM", 77); - con!("EX_CONFIG", 78); + // --- Windows-only: the CRT spawn family (posixmodule.c `os_spawnv_impl`/ + // `os_spawnve_impl` under `HAVE_WSPAWNV`) plus its `P_*` mode constants + // (`process.h` values). `os.waitpid` accepts the P_NOWAIT handle. + #[cfg(windows)] + { + reg!("spawnv", os_spawnv); + reg!("spawnve", os_spawnve); + con!("P_WAIT", 0); + con!("P_NOWAIT", 1); + con!("P_OVERLAY", 2); + con!("P_NOWAITO", 3); + con!("P_DETACH", 4); + } // `environb` — a bytes-keyed/-valued view of the environment. CPython // builds it lazily from the raw `environ` block; we snapshot at import @@ -174,13 +205,9 @@ pub(super) fn register(d: &mut DictData) { #[cfg(unix)] const WUNTRACED: libc::c_int = libc::WUNTRACED; -// `WUNTRACED` is a POSIX `wait`-option flag with no Windows analogue; expose the -// canonical value so `os.WUNTRACED` still resolves (mirrors `WCONTINUED`). -#[cfg(not(unix))] -const WUNTRACED: libc::c_int = 0x2; #[cfg(target_os = "linux")] const WCONTINUED: libc::c_int = libc::WCONTINUED; -#[cfg(not(target_os = "linux"))] +#[cfg(all(unix, not(target_os = "linux")))] const WCONTINUED: libc::c_int = 0x10; // --------------------------------------------------------------------------- @@ -202,7 +229,7 @@ fn obj_to_cstring(o: &Object, what: &str) -> Result { CString::new(bytes).map_err(|_| value_error(format!("{what}: embedded null byte"))) } -#[cfg(unix)] +#[cfg(any(unix, windows))] fn obj_to_int(o: &Object, what: &str) -> Result { // `as_i64` also unwraps int subclasses (e.g. `signal.Signals` enum // members), matching CPython's `__index__` coercion for these args. @@ -355,7 +382,7 @@ fn obj_to_env_bytes(o: &Object, what: &str) -> Result, RuntimeError> { /// `os.environb`), whose canonical bytes-keyed store lives in the `_data` /// instance attribute. Returns `None` for anything else (e.g. a sequence of /// `KEY=VALUE` strings), letting the caller fall back to the sequence path. -#[cfg(unix)] +#[cfg(any(unix, windows))] fn env_mapping_dict(env: &Object) -> Option>> { match env { Object::Dict(d) => Some(d.clone()), @@ -594,13 +621,6 @@ pub fn process_is_multithreaded() -> bool { false } -#[cfg(not(unix))] -fn os_fork(_args: &[Object]) -> Result { - Err(crate::error::not_implemented_error( - "os.fork() requires POSIX", - )) -} - #[cfg(unix)] fn os_exit_now(args: &[Object]) -> Result { let code = args @@ -610,7 +630,21 @@ fn os_exit_now(args: &[Object]) -> Result { unsafe { libc::_exit(code as libc::c_int) } } -#[cfg(not(unix))] +/// Windows `os._exit` — the CRT's `_exit`, which (unlike `exit`) skips +/// atexit handlers and stdio flushing, matching CPython's `os__exit_impl`. +#[cfg(windows)] +fn os_exit_now(args: &[Object]) -> Result { + unsafe extern "C" { + fn _exit(code: i32) -> !; + } + let code = match args.first() { + Some(Object::Int(n)) => *n, + _ => 0, + }; + unsafe { _exit(code as i32) } +} + +#[cfg(not(any(unix, windows)))] fn os_exit_now(args: &[Object]) -> Result { let code = match args.first() { Some(Object::Int(n)) => *n, @@ -751,29 +785,149 @@ fn resolve_path(file: &[u8], env: &Object) -> Vec> { out } -#[cfg(not(unix))] -fn os_execv(_args: &[Object]) -> Result { - Err(crate::error::not_implemented_error( - "os.execv requires POSIX", - )) +// --------------------------------------------------------------------------- +// Windows spawn family — the CRT's `_wspawnv`/`_wspawnve` (posixmodule.c +// `os_spawnv_impl`/`os_spawnve_impl` under `HAVE_WSPAWNV`). `distutils`-era +// build tooling and `test_os.SpawnTests` drive these; `subprocess` does not +// (it uses `_winapi.CreateProcess`). +// --------------------------------------------------------------------------- + +/// Collect `argv` (a tuple/list of str) into NUL-terminated wide strings. +/// CPython rejects an empty argv and an empty `argv[0]` with `ValueError`. +#[cfg(windows)] +fn spawn_wide_argv(argv: &Object, what: &str) -> Result>, RuntimeError> { + let items: Vec = match argv { + Object::Tuple(t) => t.to_vec(), + Object::List(l) => l.borrow().to_vec(), + _ => { + return Err(type_error(format!( + "{what}() arg 2 must be a tuple or list" + ))) + } + }; + if items.is_empty() { + return Err(value_error(format!("{what}() arg 2 cannot be empty"))); + } + let mut out = Vec::with_capacity(items.len()); + for (i, item) in items.iter().enumerate() { + let s = match item { + Object::Str(s) => s.to_string(), + _ => { + return Err(type_error(format!( + "{what}() arg 2 must contain only strings" + ))) + } + }; + if i == 0 && s.is_empty() { + return Err(value_error(format!( + "{what}() arg 2 first element cannot be empty" + ))); + } + if s.as_bytes().contains(&0) { + return Err(value_error("embedded null character")); + } + out.push(crate::stdlib::nt_support::wide(&s)); + } + Ok(out) } -#[cfg(not(unix))] -fn os_execve(_args: &[Object]) -> Result { - Err(crate::error::not_implemented_error( - "os.execve requires POSIX", - )) + +/// Shared implementation for `os.spawnv`/`os.spawnve` on Windows. +#[cfg(windows)] +fn spawnv_impl(args: &[Object], with_env: bool, what: &str) -> Result { + use crate::stdlib::nt_support::{last_crt_error_to_py, wide}; + unsafe extern "C" { + fn _wspawnv(mode: i32, cmdname: *const u16, argv: *const *const u16) -> isize; + fn _wspawnve( + mode: i32, + cmdname: *const u16, + argv: *const *const u16, + envp: *const *const u16, + ) -> isize; + } + let mode = args + .first() + .and_then(Object::as_i64) + .ok_or_else(|| type_error(format!("{what}() mode must be int")))?; + let path = match args.get(1) { + Some(Object::Str(s)) => s.to_string(), + Some(Object::Bytes(b)) => String::from_utf8_lossy(b).into_owned(), + _ => return Err(type_error(format!("{what}() arg 2 must be str"))), + }; + if path.as_bytes().contains(&0) { + return Err(value_error("embedded null character")); + } + let argv = args + .get(2) + .ok_or_else(|| type_error(format!("{what}(): missing argv")))?; + let wargv = spawn_wide_argv(argv, what)?; + let mut argv_ptrs: Vec<*const u16> = wargv.iter().map(|w| w.as_ptr()).collect(); + argv_ptrs.push(std::ptr::null()); + let wpath = wide(&path); + // `P_OVERLAY` replaces the current process, which would tear the VM down + // mid-instruction; CPython permits it, but a truthful "not yet" beats a + // corrupted interpreter (RFC 0063 truthful-inventory rule). + if mode == 2 { + return Err(crate::error::not_implemented_error( + "os.spawn*: P_OVERLAY is not supported in WeavePy yet", + )); + } + let rc = if with_env { + let env = args + .get(3) + .ok_or_else(|| type_error("spawnve(): missing env"))?; + let env_dict = + env_mapping_dict(env).ok_or_else(|| type_error("spawnve() arg 4 must be a mapping"))?; + let mut wenv: Vec> = Vec::new(); + for (k, v) in env_dict.borrow().iter() { + let key = match &k.0 { + Object::Str(s) => s.to_string(), + Object::Bytes(b) => String::from_utf8_lossy(b).into_owned(), + _ => return Err(type_error("spawnve() env keys must be str")), + }; + let val = match v { + Object::Str(s) => s.to_string(), + Object::Bytes(b) => String::from_utf8_lossy(b).into_owned(), + _ => return Err(type_error("spawnve() env values must be str")), + }; + if key.contains('=') || key.contains('\0') || val.contains('\0') { + return Err(value_error("illegal environment variable name")); + } + wenv.push(wide(&format!("{key}={val}"))); + } + let mut env_ptrs: Vec<*const u16> = wenv.iter().map(|w| w.as_ptr()).collect(); + env_ptrs.push(std::ptr::null()); + // SAFETY: NUL-terminated wide argv/envp arrays built above outlive + // the call. Release the GIL: P_WAIT blocks until the child exits. + crate::gil::allow_threads_then(|| unsafe { + _wspawnve( + mode as i32, + wpath.as_ptr(), + argv_ptrs.as_ptr(), + env_ptrs.as_ptr(), + ) + }) + } else { + // SAFETY: as above. + crate::gil::allow_threads_then(|| unsafe { + _wspawnv(mode as i32, wpath.as_ptr(), argv_ptrs.as_ptr()) + }) + }; + if rc == -1 { + return Err(last_crt_error_to_py(Some(&path))); + } + // P_WAIT yields the exit code; P_NOWAIT* a process handle `os.waitpid` + // can consume — both returned as-is, like CPython. + Ok(Object::Int(rc as i64)) } -#[cfg(not(unix))] -fn os_execvp(_args: &[Object]) -> Result { - Err(crate::error::not_implemented_error( - "os.execvp requires POSIX", - )) + +#[cfg(windows)] +fn os_spawnv(args: &[Object]) -> Result { + spawnv_impl(args, false, "spawnv") } -#[cfg(not(unix))] -fn os_execvpe(_args: &[Object]) -> Result { - Err(crate::error::not_implemented_error( - "os.execvpe requires POSIX", - )) + +#[cfg(windows)] +fn os_spawnve(args: &[Object]) -> Result { + spawnv_impl(args, true, "spawnve") } // --------------------------------------------------------------------------- @@ -1027,19 +1181,6 @@ fn posix_spawn_impl( Ok(Object::Int(i64::from(pid))) } -#[cfg(not(unix))] -fn os_posix_spawn(_args: &[Object], _kw: &[(String, Object)]) -> Result { - Err(crate::error::not_implemented_error( - "os.posix_spawn requires POSIX", - )) -} -#[cfg(not(unix))] -fn os_posix_spawnp(_args: &[Object], _kw: &[(String, Object)]) -> Result { - Err(crate::error::not_implemented_error( - "os.posix_spawnp requires POSIX", - )) -} - // --------------------------------------------------------------------------- // wait family // --------------------------------------------------------------------------- @@ -1142,27 +1283,8 @@ fn build_rusage(ru: &libc::rusage) -> Object { ]) } -#[cfg(not(unix))] -fn os_wait(_args: &[Object]) -> Result { - Err(crate::error::not_implemented_error( - "os.wait requires POSIX", - )) -} -#[cfg(not(unix))] -fn os_wait3(_args: &[Object]) -> Result { - Err(crate::error::not_implemented_error( - "os.wait3 requires POSIX", - )) -} -#[cfg(not(unix))] -fn os_wait4(_args: &[Object]) -> Result { - Err(crate::error::not_implemented_error( - "os.wait4 requires POSIX", - )) -} - // --------------------------------------------------------------------------- -// W* status macros +// W* status macros (POSIX-only, like the registrations above) // --------------------------------------------------------------------------- #[cfg(unix)] @@ -1174,46 +1296,35 @@ fn status_arg(args: &[Object]) -> Result { } } +#[cfg(unix)] macro_rules! wmacro { ($name:ident, bool, $libc:ident) => { fn $name(args: &[Object]) -> Result { - #[cfg(unix)] - { - Ok(Object::Bool(libc::$libc(status_arg(args)?))) - } - #[cfg(not(unix))] - { - let _ = args; - Err(crate::error::not_implemented_error( - "W* status macros require POSIX", - )) - } + Ok(Object::Bool(libc::$libc(status_arg(args)?))) } }; ($name:ident, int, $libc:ident) => { fn $name(args: &[Object]) -> Result { - #[cfg(unix)] - { - Ok(Object::Int(i64::from(libc::$libc(status_arg(args)?)))) - } - #[cfg(not(unix))] - { - let _ = args; - Err(crate::error::not_implemented_error( - "W* status macros require POSIX", - )) - } + Ok(Object::Int(i64::from(libc::$libc(status_arg(args)?)))) } }; } +#[cfg(unix)] wmacro!(w_ifexited, bool, WIFEXITED); +#[cfg(unix)] wmacro!(w_exitstatus, int, WEXITSTATUS); +#[cfg(unix)] wmacro!(w_ifsignaled, bool, WIFSIGNALED); +#[cfg(unix)] wmacro!(w_termsig, int, WTERMSIG); +#[cfg(unix)] wmacro!(w_ifstopped, bool, WIFSTOPPED); +#[cfg(unix)] wmacro!(w_stopsig, int, WSTOPSIG); +#[cfg(unix)] wmacro!(w_ifcontinued, bool, WIFCONTINUED); +#[cfg(unix)] wmacro!(w_coredump, bool, WCOREDUMP); // --------------------------------------------------------------------------- @@ -1331,29 +1442,52 @@ fn os_killpg(args: &[Object]) -> Result { Ok(Object::None) } -#[cfg(not(unix))] -mod nonunix_pg { - use super::{Object, RuntimeError}; - macro_rules! ni { - ($n:ident) => { - pub(super) fn $n(_a: &[Object]) -> Result { - Err(crate::error::not_implemented_error("requires POSIX")) - } - }; +/// Windows `os.getppid` — CPython 3.13's `win32_getppid` (posixmodule.c): +/// `NtQueryInformationProcess(ProcessBasicInformation)` on the current +/// process, whose `InheritedFromUniqueProcessId` slot is the parent pid. +#[cfg(windows)] +fn os_getppid(_args: &[Object]) -> Result { + use windows_sys::Win32::System::Threading::GetCurrentProcess; + // The workspace `windows-sys` feature set doesn't include `Wdk`, so bind + // the ntdll export directly (CPython links it the same way). + #[link(name = "ntdll")] + unsafe extern "system" { + fn NtQueryInformationProcess( + process_handle: *mut core::ffi::c_void, + process_information_class: i32, + process_information: *mut core::ffi::c_void, + process_information_length: u32, + return_length: *mut u32, + ) -> i32; } - ni!(os_setsid); - ni!(os_getsid); - ni!(os_setpgid); - ni!(os_getpgid); - ni!(os_getpgrp); - ni!(os_setpgrp); - ni!(os_getppid); - ni!(os_tcgetpgrp); - ni!(os_tcsetpgrp); - ni!(os_killpg); + const PROCESS_BASIC_INFORMATION_CLASS: i32 = 0; + // PROCESS_BASIC_INFORMATION: six pointer-sized slots; index 5 is + // InheritedFromUniqueProcessId (the layout NtQueryInformationProcess has + // filled since NT 3.5 — CPython reads the same struct). + let mut info = [0usize; 6]; + let mut ret_len: u32 = 0; + // SAFETY: `info` is exactly the size the query writes. + let status = unsafe { + NtQueryInformationProcess( + GetCurrentProcess(), + PROCESS_BASIC_INFORMATION_CLASS, + info.as_mut_ptr().cast(), + std::mem::size_of_val(&info) as u32, + &raw mut ret_len, + ) + }; + if status != 0 { + return Err(crate::error::os_error(format!( + "NtQueryInformationProcess failed (NTSTATUS 0x{status:08X})" + ))); + } + Ok(Object::Int(info[5] as i64)) +} + +#[cfg(not(any(unix, windows)))] +fn os_getppid(_args: &[Object]) -> Result { + Err(crate::error::not_implemented_error("requires POSIX")) } -#[cfg(not(unix))] -use nonunix_pg::*; // --------------------------------------------------------------------------- // uid/gid setters (POSIX) @@ -1397,25 +1531,6 @@ fn os_setgroups(_args: &[Object]) -> Result { Ok(Object::None) } -#[cfg(not(unix))] -mod nonunix_ids { - use super::{Object, RuntimeError}; - macro_rules! ni { - ($n:ident) => { - pub(super) fn $n(_a: &[Object]) -> Result { - Err(crate::error::not_implemented_error("requires POSIX")) - } - }; - } - ni!(os_setuid); - ni!(os_setgid); - ni!(os_seteuid); - ni!(os_setegid); - ni!(os_setgroups); -} -#[cfg(not(unix))] -use nonunix_ids::*; - // --------------------------------------------------------------------------- // fd helpers // --------------------------------------------------------------------------- @@ -1483,18 +1598,41 @@ fn os_pipe2(args: &[Object]) -> Result { ])) } -#[cfg(not(unix))] +/// Windows `os.closerange` — CRT `_close` per fd, ignoring failures like +/// CPython's `os_closerange_impl` (which suppresses per-fd errors under +/// `_Py_BEGIN_SUPPRESS_IPH` too). Each closed fd is also dropped from the +/// nt_support registry so `Disk`-backed streams don't double-close. +#[cfg(windows)] +fn os_closerange(args: &[Object]) -> Result { + use crate::stdlib::nt_support::{self, crt}; + let lo = obj_to_int( + args.first() + .ok_or_else(|| type_error("closerange: fd_low"))?, + "fd_low", + )? as i32; + let hi = obj_to_int( + args.get(1) + .ok_or_else(|| type_error("closerange: fd_high"))?, + "fd_high", + )? as i32; + for fd in lo..hi { + // Probe validity first: `_close` on an unopened CRT fd trips the UCRT + // invalid-parameter handler in debug CRTs; `_get_osfhandle` is the + // benign check (-1 = not open). + if unsafe { crt::_get_osfhandle(fd) } != -1 { + unsafe { crt::_close(fd) }; + nt_support::forget_fd(fd); + } + } + Ok(Object::None) +} + +#[cfg(not(any(unix, windows)))] fn os_closerange(_args: &[Object]) -> Result { Err(crate::error::not_implemented_error( "os.closerange requires POSIX", )) } -#[cfg(not(unix))] -fn os_pipe2(_args: &[Object]) -> Result { - Err(crate::error::not_implemented_error( - "os.pipe2 requires POSIX", - )) -} // --------------------------------------------------------------------------- // scheduling / affinity @@ -1529,15 +1667,12 @@ fn os_sched_setaffinity(_args: &[Object]) -> Result { Ok(Object::None) } +// `sched_yield` is `HAVE_SCHED_H`-only in CPython; absent on Windows. #[cfg(unix)] fn os_sched_yield(_args: &[Object]) -> Result { unsafe { libc::sched_yield() }; Ok(Object::None) } -#[cfg(not(unix))] -fn os_sched_yield(_args: &[Object]) -> Result { - Ok(Object::None) -} // --------------------------------------------------------------------------- // device_encoding / environb @@ -1556,7 +1691,32 @@ fn os_device_encoding(args: &[Object]) -> Result { // A tty: CPython returns the locale encoding (UTF-8 in our locale model). Ok(Object::from_static("UTF-8")) } -#[cfg(not(unix))] +/// Windows `os.device_encoding` — CPython's `_Py_device_encoding`: `None` +/// for a non-tty fd; for a console fd, `'cp%d'` of `GetConsoleCP()` on +/// stdin (fd 0) and `GetConsoleOutputCP()` on stdout/stderr. +#[cfg(windows)] +fn os_device_encoding(args: &[Object]) -> Result { + use windows_sys::Win32::System::Console::{GetConsoleCP, GetConsoleOutputCP}; + let fd = obj_to_int( + args.first() + .ok_or_else(|| type_error("device_encoding: fd"))?, + "fd", + )? as i32; + if unsafe { crate::stdlib::nt_support::crt::_isatty(fd) } == 0 { + return Ok(Object::None); + } + let cp = match fd { + 0 => unsafe { GetConsoleCP() }, + 1 | 2 => unsafe { GetConsoleOutputCP() }, + _ => 0, + }; + if cp == 0 { + return Ok(Object::None); + } + Ok(Object::from_str(format!("cp{cp}"))) +} + +#[cfg(not(any(unix, windows)))] fn os_device_encoding(_args: &[Object]) -> Result { Ok(Object::None) } @@ -1582,25 +1742,28 @@ fn os_str_bytes(s: &std::ffi::OsStr) -> Vec { // register_at_fork // --------------------------------------------------------------------------- +#[cfg(unix)] #[derive(Clone, Copy)] -#[cfg_attr(not(unix), allow(dead_code))] enum AtForkPhase { Before, Parent, Child, } +#[cfg(unix)] struct AtForkHandlers { before: Vec, after_in_parent: Vec, after_in_child: Vec, } +#[cfg(unix)] static ATFORK: Mutex> = Mutex::new(None); /// `os.register_at_fork(*, before=None, after_in_parent=None, /// after_in_child=None)` — record callables fired around `os.fork()` and /// the `multiprocessing` fork start method. +#[cfg(unix)] pub(super) fn register_at_fork_kw( args: &[Object], kwargs: &[(String, Object)], diff --git a/crates/weavepy-vm/src/stdlib/overlapped_mod.rs b/crates/weavepy-vm/src/stdlib/overlapped_mod.rs new file mode 100644 index 00000000..1569ba6f --- /dev/null +++ b/crates/weavepy-vm/src/stdlib/overlapped_mod.rs @@ -0,0 +1,1811 @@ +//! The `_overlapped` built-in module (RFC 0063 WS4) — the IOCP layer +//! under `asyncio.ProactorEventLoop`, transcribed from CPython 3.13's +//! `Modules/overlapped.c`. +//! +//! Surface: the completion-port functions (`CreateIoCompletionPort`, +//! `GetQueuedCompletionStatus`, `PostQueuedCompletionStatus`), the +//! thread-pool wait bridge (`RegisterWaitWithQueue`/`UnregisterWait +//! (Ex)`), event helpers, `BindLocal`/`WSAConnect`/`ConnectPipe`/ +//! `FormatMessage`, and the `Overlapped` type whose methods start +//! overlapped operations (`ReadFile`, `WSARecv`, `WSASend`, `AcceptEx`, +//! `ConnectEx`, …) and whose `getresult()` collects them. +//! +//! Two invariants carried over from `overlapped.c`: +//! +//! 1. **The `OVERLAPPED` struct and every buffer an operation hands the +//! kernel must stay at a stable address until the operation +//! completes** (or is cancelled *and* drained). CPython embeds the +//! `OVERLAPPED` in the PyObject (objects never move); WeavePy's +//! instances have no stable native payload, so each `Overlapped` +//! heap-allocates an [`OvBlock`] held in a process-global registry +//! keyed by the `OVERLAPPED`'s address — the same value exposed as +//! `.address` and returned by `GetQueuedCompletionStatus`, which is +//! exactly how `IocpProactor._cache` keys its dict. +//! 2. **The wait callback runs on an OS thread-pool thread without the +//! GIL** and must not touch Python state: like CPython's +//! `PostToQueueCallback` it only calls `PostQueuedCompletionStatus` +//! and frees its heap context. + +use std::cell::UnsafeCell; +use std::collections::HashMap; +use std::ffi::c_void; + +use num_traits::ToPrimitive; + +use windows_sys::Win32::Foundation::{ + CloseHandle, GetLastError, ERROR_BROKEN_PIPE, ERROR_IO_PENDING, ERROR_MORE_DATA, + ERROR_NOT_FOUND, ERROR_OPERATION_ABORTED, ERROR_PIPE_CONNECTED, ERROR_SUCCESS, GENERIC_READ, + GENERIC_WRITE, HANDLE, WAIT_TIMEOUT, +}; +use windows_sys::Win32::Networking::WinSock as ws; +use windows_sys::Win32::Storage::FileSystem::{ + CreateFileW, ReadFile, WriteFile, FILE_FLAG_OVERLAPPED, OPEN_EXISTING, +}; +use windows_sys::Win32::System::Threading::{ + CreateEventW, RegisterWaitForSingleObject, ResetEvent, SetEvent, UnregisterWait, + UnregisterWaitEx, WT_EXECUTEINWAITTHREAD, WT_EXECUTEONLYONCE, +}; +use windows_sys::Win32::System::IO::{ + CancelIoEx, CreateIoCompletionPort, GetOverlappedResult, GetQueuedCompletionStatus, + PostQueuedCompletionStatus, OVERLAPPED, +}; + +use crate::error::{type_error, value_error, RuntimeError}; +use crate::import::ModuleCache; +use crate::object::{BuiltinFn, DictData, DictKey, MethodWrapper, Object, PyModule, PyProperty}; +use crate::stdlib::nt_support::{last_win32_error_to_py, wide, win32_error_to_py}; +use crate::sync::Rc; +use crate::sync::RefCell; +use crate::types::{PyInstance, TypeFlags, TypeObject}; + +// `ntdef.h` STATUS_PENDING: `HasOverlappedIoCompleted(o)` is +// `o->Internal != STATUS_PENDING`. +const STATUS_PENDING: usize = 0x103; + +/// Win32 verdict of a `SOCKET_ERROR`-convention Winsock start call. +fn wsa_start_err(ret: i32) -> u32 { + if ret < 0 { + unsafe { ws::WSAGetLastError() as u32 } + } else { + ERROR_SUCCESS + } +} + +/// Win32 verdict of a BOOL-returning Winsock (extension) call. +fn wsa_bool_err(ret: i32) -> u32 { + if ret == 0 { + unsafe { ws::WSAGetLastError() as u32 } + } else { + ERROR_SUCCESS + } +} + +pub fn build(_cache: &ModuleCache) -> Rc { + // CPython's module exec imports `_socket` first so WSAStartup has + // run before `initialize_function_pointers`. WeavePy's `_socket` + // initialises Winsock lazily through std/socket2, so the module + // arms Winsock itself — WSAStartup is per-process refcounted, so + // doubling up with `_socket` is harmless. + ensure_winsock(); + + let dict = Rc::new(RefCell::new(DictData::default())); + { + let mut d = dict.borrow_mut(); + d.insert( + DictKey(Object::from_static("__name__")), + Object::from_static("_overlapped"), + ); + d.insert( + DictKey(Object::from_static("__doc__")), + Object::from_static("_overlapped module (RFC 0063; CPython Modules/overlapped.c)"), + ); + + for (name, f) in [ + ( + "CreateIoCompletionPort", + mod_create_io_completion_port as fn(&[Object]) -> Result, + ), + ( + "GetQueuedCompletionStatus", + mod_get_queued_completion_status, + ), + ( + "PostQueuedCompletionStatus", + mod_post_queued_completion_status, + ), + ("FormatMessage", mod_format_message), + ("BindLocal", mod_bind_local), + ("RegisterWaitWithQueue", mod_register_wait_with_queue), + ("UnregisterWait", mod_unregister_wait), + ("UnregisterWaitEx", mod_unregister_wait_ex), + ("CreateEvent", mod_create_event), + ("SetEvent", mod_set_event), + ("ResetEvent", mod_reset_event), + ("ConnectPipe", mod_connect_pipe), + ("WSAConnect", mod_wsa_connect), + ] { + d.insert(DictKey(Object::from_static(name)), b(name, f)); + } + + d.insert( + DictKey(Object::from_static("Overlapped")), + Object::Type(overlapped_type()), + ); + + // The constant family `overlapped_exec` publishes. Handles are + // unsigned (`F_HANDLE` is "K"), so `INVALID_HANDLE_VALUE` is + // 2**64-1 on Win64 exactly as CPython exposes it. + for (name, val) in [ + ("ERROR_IO_PENDING", i64::from(ERROR_IO_PENDING)), + ( + "ERROR_NETNAME_DELETED", + i64::from(windows_sys::Win32::Foundation::ERROR_NETNAME_DELETED), + ), + ( + "ERROR_OPERATION_ABORTED", + i64::from(ERROR_OPERATION_ABORTED), + ), + ( + "ERROR_SEM_TIMEOUT", + i64::from(windows_sys::Win32::Foundation::ERROR_SEM_TIMEOUT), + ), + ( + "ERROR_PIPE_BUSY", + i64::from(windows_sys::Win32::Foundation::ERROR_PIPE_BUSY), + ), + ( + "ERROR_PORT_UNREACHABLE", + i64::from(windows_sys::Win32::Foundation::ERROR_PORT_UNREACHABLE), + ), + ("INFINITE", i64::from(u32::MAX)), + ("NULL", 0), + ( + "SO_UPDATE_ACCEPT_CONTEXT", + i64::from(ws::SO_UPDATE_ACCEPT_CONTEXT), + ), + ( + "SO_UPDATE_CONNECT_CONTEXT", + i64::from(ws::SO_UPDATE_CONNECT_CONTEXT), + ), + ("TF_REUSE_SOCKET", i64::from(ws::TF_REUSE_SOCKET)), + ] { + d.insert(DictKey(Object::from_static(name)), Object::Int(val)); + } + d.insert( + DictKey(Object::from_static("INVALID_HANDLE_VALUE")), + uint_obj(usize::MAX), + ); + } + Rc::new(PyModule { + name: "_overlapped".to_owned(), + filename: None, + dict, + }) +} + +// --------------------------------------------------------------------------- +// Small builders / argument converters. +// --------------------------------------------------------------------------- + +fn b(name: &'static str, body: fn(&[Object]) -> Result) -> Object { + Object::Builtin(Rc::new(BuiltinFn { + name, + binds_instance: false, + call: Box::new(body), + call_kw: None, + })) +} + +fn method(name: &'static str, body: fn(&[Object]) -> Result) -> Object { + Object::Builtin(Rc::new(BuiltinFn { + name, + binds_instance: true, + call: Box::new(body), + call_kw: None, + })) +} + +/// An unsigned pointer-sized value as a Python int — CPython's +/// `F_HANDLE`/`F_ULONG_PTR` ("K") return convention for handles, keys +/// and `OVERLAPPED` addresses. +fn uint_obj(v: usize) -> Object { + Object::int_from_i128(v as i128) +} + +/// `F_HANDLE`/`F_ULONG_PTR` argument: a Python int reinterpreted as a +/// pointer-sized unsigned (CPython goes through `PyLong_AsVoidPtr`, so +/// both -1 and 2**64-1 name `INVALID_HANDLE_VALUE`). +fn uintptr_arg(o: Option<&Object>, name: &str) -> Result { + match o { + Some(Object::Int(n)) => Ok(*n as usize), + Some(Object::Bool(v)) => Ok(usize::from(*v)), + Some(Object::Long(big)) => big + .to_u64() + .map(|v| v as usize) + .or_else(|| big.to_i64().map(|v| v as usize)) + .ok_or_else(|| { + crate::error::overflow_error(format!("{name} does not fit in a HANDLE")) + }), + Some(other) => Err(type_error(format!( + "{name} must be an int, not {}", + other.type_name_owned() + ))), + None => Err(type_error(format!("missing required argument {name}"))), + } +} + +/// `F_DWORD` ("k") argument: unsigned-long with CPython's mask +/// semantics (`PyLong_AsUnsignedLongMask` wraps out-of-range values). +fn dword_arg(o: Option<&Object>, name: &str) -> Result { + Ok(uintptr_arg(o, name)? as u32) +} + +/// `F_BOOL` ("i") argument, defaulting when absent. +fn bool_arg(o: Option<&Object>, default: bool) -> bool { + match o { + None | Some(Object::None) => default, + Some(v) => v.is_truthy(), + } +} + +/// `y*`-style read buffer: copied out, because the started operation +/// owns its bytes for the whole kernel lifetime (see [`Op`]). +fn bytes_like(o: Option<&Object>, func: &str) -> Result, RuntimeError> { + match o { + Some(Object::Bytes(bs)) => Ok(bs.to_vec()), + Some(Object::ByteArray(bs)) => Ok(bs.borrow().clone()), + Some(Object::MemoryView(mv)) => Ok(mv.to_bytes()), + Some(other) => Err(type_error(format!( + "{func}() argument must be a bytes-like object, not '{}'", + other.type_name_owned() + ))), + None => Err(type_error(format!("{func}() missing buffer argument"))), + } +} + +/// A writable Python buffer target for the `*Into` operations. Returns +/// its writable byte length; the object itself is pinned on the +/// instance for the operation lifetime and filled at `getresult` time. +fn writable_len(o: &Object, func: &str) -> Result { + match o { + Object::ByteArray(bs) => Ok(bs.borrow().len()), + Object::MemoryView(mv) => { + if mv.readonly.get() { + return Err(type_error(format!( + "{func}() argument must be read-write buffer" + ))); + } + Ok(mv.len.get()) + } + other => Err(type_error(format!( + "{func}() argument must be a writable bytes-like object, not '{}'", + other.type_name_owned() + ))), + } +} + +/// Copy received bytes back into the pinned Python buffer. WeavePy +/// diverges here from CPython by one step: the kernel writes into a +/// module-owned staging `Vec` (whose address is guaranteed stable) and +/// the bytes land in the user object when `getresult()` collects the +/// operation — the only point the proactor reads the buffer. Direct +/// kernel writes into a `bytearray`'s heap allocation would race any +/// Python-side resize while the operation is pending. +fn copy_out(target: &Object, data: &[u8]) { + match target { + Object::ByteArray(bs) => { + let mut v = bs.borrow_mut(); + let n = data.len().min(v.len()); + v[..n].copy_from_slice(&data[..n]); + } + Object::MemoryView(mv) => { + let start = mv.start.get(); + let len = mv.len.get(); + mv.buffer.with_write(|s| { + let end = (start + len).min(s.len()); + if start < end { + let window = &mut s[start..end]; + let n = data.len().min(window.len()); + window[..n].copy_from_slice(&data[..n]); + } + }); + } + _ => {} + } +} + +// --------------------------------------------------------------------------- +// Winsock arming + the Mswsock extension functions. +// --------------------------------------------------------------------------- + +fn ensure_winsock() { + static ARMED: std::sync::OnceLock<()> = std::sync::OnceLock::new(); + ARMED.get_or_init(|| { + let mut data: ws::WSADATA = unsafe { std::mem::zeroed() }; + // 2.2, like CPython's socketmodule. Failure is surfaced later by + // the first Winsock call (WSANOTINITIALISED), same as CPython. + unsafe { ws::WSAStartup(0x0202, &raw mut data) }; + }); +} + +/// The AcceptEx/ConnectEx/DisconnectEx/TransmitFile entry points do not +/// live in ws2_32's import table; they are fetched per-provider through +/// `WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER)` — CPython's +/// `initialize_function_pointers`, verbatim. +#[derive(Clone, Copy)] +struct WsaExtFns { + accept_ex: ws::LPFN_ACCEPTEX, + connect_ex: ws::LPFN_CONNECTEX, + disconnect_ex: ws::LPFN_DISCONNECTEX, + transmit_file: ws::LPFN_TRANSMITFILE, +} + +fn ext_fns() -> Result { + static FNS: std::sync::OnceLock> = std::sync::OnceLock::new(); + FNS.get_or_init(|| { + ensure_winsock(); + let s = unsafe { ws::socket(i32::from(ws::AF_INET), ws::SOCK_STREAM, ws::IPPROTO_TCP) }; + if s == ws::INVALID_SOCKET { + return Err(unsafe { ws::WSAGetLastError() }); + } + let mut fns = WsaExtFns { + accept_ex: None, + connect_ex: None, + disconnect_ex: None, + transmit_file: None, + }; + // SAFETY: each output slot is a pointer-sized, null-niched + // `Option` — exactly the out-buffer WSAIoctl expects. + let load = |guid: windows_sys::core::GUID, out: *mut c_void, out_len: u32| -> bool { + let mut bytes = 0u32; + let rc = unsafe { + ws::WSAIoctl( + s, + ws::SIO_GET_EXTENSION_FUNCTION_POINTER, + std::ptr::from_ref(&guid).cast::().cast_mut(), + u32::try_from(std::mem::size_of::()).unwrap(), + out, + out_len, + &raw mut bytes, + std::ptr::null_mut(), + None, + ) + }; + rc != ws::SOCKET_ERROR + }; + let fn_size = u32::try_from(std::mem::size_of::()).unwrap(); + let ok = load( + ws::WSAID_ACCEPTEX, + std::ptr::from_mut(&mut fns.accept_ex).cast(), + fn_size, + ) && load( + ws::WSAID_CONNECTEX, + std::ptr::from_mut(&mut fns.connect_ex).cast(), + fn_size, + ) && load( + ws::WSAID_DISCONNECTEX, + std::ptr::from_mut(&mut fns.disconnect_ex).cast(), + fn_size, + ) && load( + ws::WSAID_TRANSMITFILE, + std::ptr::from_mut(&mut fns.transmit_file).cast(), + fn_size, + ); + let err = unsafe { ws::WSAGetLastError() }; + unsafe { ws::closesocket(s) }; + if ok { + Ok(fns) + } else { + Err(err) + } + }) + .map_err(|code| win32_error_to_py(code, None)) +} + +// --------------------------------------------------------------------------- +// Socket addresses (overlapped.c `parse_address` / `unparse_address`). +// --------------------------------------------------------------------------- + +enum SockAddrBuf { + V4(ws::SOCKADDR_IN), + V6(ws::SOCKADDR_IN6), +} + +impl SockAddrBuf { + fn as_ptr(&self) -> *const ws::SOCKADDR { + match self { + SockAddrBuf::V4(a) => std::ptr::from_ref(a).cast(), + SockAddrBuf::V6(a) => std::ptr::from_ref(a).cast(), + } + } + fn len(&self) -> i32 { + match self { + SockAddrBuf::V4(_) => std::mem::size_of::() as i32, + SockAddrBuf::V6(_) => std::mem::size_of::() as i32, + } + } +} + +fn tuple_str(o: Option<&Object>, what: &str) -> Result { + match o { + Some(Object::Str(s)) => Ok(s.to_string()), + _ => Err(type_error(format!("{what} must be str"))), + } +} + +fn tuple_u16(o: Option<&Object>, what: &str) -> Result { + match o { + Some(Object::Int(n)) if (0..=i64::from(u16::MAX)).contains(n) => Ok(*n as u16), + Some(Object::Int(_) | Object::Long(_)) => Err(crate::error::overflow_error(format!( + "{what} must be in range(0, 65536)" + ))), + Some(Object::Bool(v)) => Ok(u16::from(*v)), + _ => Err(type_error(format!("{what} must be int"))), + } +} + +/// A `(host, port)` / `(host, port, flowinfo, scopeid)` tuple to a +/// Winsock sockaddr. CPython routes the host text through +/// `WSAStringToAddressW`, which only accepts numeric literals — the +/// std parsers cover the same forms (asyncio always hands this +/// getaddrinfo-resolved numerics). +fn parse_address(o: Option<&Object>) -> Result { + let items: Vec = match o { + Some(Object::Tuple(t)) => t.to_vec(), + Some(Object::List(l)) => l.borrow().clone(), + _ => return Err(type_error("address must be a tuple")), + }; + match items.len() { + 2 => { + let host = tuple_str(items.first(), "address host")?; + let port = tuple_u16(items.get(1), "address port")?; + let ip: std::net::Ipv4Addr = host + .parse() + .map_err(|_| value_error(format!("invalid IPv4 address: '{host}'")))?; + let mut sa: ws::SOCKADDR_IN = unsafe { std::mem::zeroed() }; + sa.sin_family = ws::AF_INET; + sa.sin_port = port.to_be(); + sa.sin_addr = ws::IN_ADDR { + S_un: ws::IN_ADDR_0 { + S_addr: u32::from(ip).to_be(), + }, + }; + Ok(SockAddrBuf::V4(sa)) + } + 4 => { + let host = tuple_str(items.first(), "address host")?; + let port = tuple_u16(items.get(1), "address port")?; + let flowinfo = dword_arg(items.get(2), "flowinfo")?; + let scope_id = dword_arg(items.get(3), "scopeid")?; + let ip: std::net::Ipv6Addr = host + .parse() + .map_err(|_| value_error(format!("invalid IPv6 address: '{host}'")))?; + let mut sa: ws::SOCKADDR_IN6 = unsafe { std::mem::zeroed() }; + sa.sin6_family = ws::AF_INET6; + sa.sin6_port = port.to_be(); + // CPython stores FlowInfo without byte-swapping (parse_address + // assigns it raw); mirrored bug-for-bug. + sa.sin6_flowinfo = flowinfo; + sa.sin6_addr = ws::IN6_ADDR { + u: ws::IN6_ADDR_0 { Byte: ip.octets() }, + }; + sa.Anonymous = ws::SOCKADDR_IN6_0 { + sin6_scope_id: scope_id, + }; + Ok(SockAddrBuf::V6(sa)) + } + _ => Err(value_error("expected tuple of length 2 or 4")), + } +} + +/// The reverse direction, for `WSARecvFrom` results (overlapped.c +/// `unparse_address`): `(host, port)` for v4, `(host, port, flowinfo, +/// scopeid)` for v6. +fn unparse_address(sa: &ws::SOCKADDR_IN6) -> Result { + let family = sa.sin6_family; + if family == ws::AF_INET { + // SAFETY: family says the storage actually holds a SOCKADDR_IN. + let v4: &ws::SOCKADDR_IN = unsafe { &*std::ptr::from_ref(sa).cast() }; + let ip = std::net::Ipv4Addr::from(u32::from_be(unsafe { v4.sin_addr.S_un.S_addr })); + Ok(Object::new_tuple(vec![ + Object::from_str(ip.to_string()), + Object::Int(i64::from(u16::from_be(v4.sin_port))), + ])) + } else if family == ws::AF_INET6 { + let ip = std::net::Ipv6Addr::from(unsafe { sa.sin6_addr.u.Byte }); + Ok(Object::new_tuple(vec![ + Object::from_str(ip.to_string()), + Object::Int(i64::from(u16::from_be(sa.sin6_port))), + // ntohl on unparse, mirroring CPython's asymmetric handling. + Object::Int(i64::from(u32::from_be(sa.sin6_flowinfo))), + Object::Int(i64::from(unsafe { sa.Anonymous.sin6_scope_id })), + ])) + } else { + Err(value_error("recvfrom returned unsupported address family")) + } +} + +// --------------------------------------------------------------------------- +// The native operation block behind each Overlapped instance. +// --------------------------------------------------------------------------- + +/// Where `WSARecvFrom(Into)` tells the kernel to deposit the sender's +/// address. `UnsafeCell` because the kernel writes these fields from an +/// arbitrary thread while the operation is pending. +struct FromAddr { + sa: UnsafeCell, + len: UnsafeCell, +} + +impl FromAddr { + fn new() -> Self { + FromAddr { + sa: UnsafeCell::new(unsafe { std::mem::zeroed() }), + len: UnsafeCell::new(std::mem::size_of::() as i32), + } + } +} + +/// The operation kind + the buffers it owns — CPython's `type` enum and +/// buffer union rolled together. An active operation OWNS its bytes: +/// the kernel keeps raw pointers into these `Vec`s until completion, so +/// they must never reallocate (they are written once at start and only +/// read back after completion) and the whole block must not drop while +/// an operation is in flight (see `ov_del`). +enum Op { + /// Freshly constructed — no operation attempted. + None, + /// The last start attempt failed; buffers released (CPython's + /// `TYPE_NOT_STARTED` after `Overlapped_clear`). + NotStarted, + /// `ReadFile`/`WSARecv`: module-allocated read target. + Read { + buf: Vec, + }, + /// `ReadFileInto`/`WSARecvInto`: staging buffer; the user object is + /// pinned on the instance and filled by `getresult`. + ReadInto { + buf: Vec, + }, + /// `WriteFile`/`WSASend`/`WSASendTo`: a private copy of the caller's + /// bytes, pinned for the kernel (field kept only for ownership). + Write { + _pinned: Vec, + }, + /// `AcceptEx`: the `(sockaddr size + 16) * 2` address buffer. + Accept { + _pinned: Vec, + }, + Connect, + Disconnect, + TransmitFile, + ConnectNamedPipe, + /// `WSARecvFrom`. + ReadFrom { + buf: Vec, + addr: FromAddr, + }, + /// `WSARecvFromInto`. + ReadFromInto { + buf: Vec, + addr: FromAddr, + }, +} + +impl Op { + fn attempted(&self) -> bool { + !matches!(self, Op::None) + } +} + +/// The stable-address native payload of one `Overlapped` instance. The +/// registry owns it boxed; its address never changes between the start +/// of an operation and `ov_del`, which is what makes `.address` a valid +/// completion key and keeps the kernel's pointers alive. +struct OvBlock { + /// `UnsafeCell`: the kernel writes `Internal`/`InternalHigh` (and + /// the IOCP machinery reads `hEvent`) concurrently with GIL-side + /// reads. All access goes through raw pointers. + ov: UnsafeCell, + /// Handle/SOCKET of the operation in flight (CPython stores it too, + /// for `GetOverlappedResult`/`CancelIoEx`). + handle: usize, + /// Win32 error of the last start call / `getresult` — the `.error` + /// attribute. + error: u32, + op: Op, +} + +// SAFETY: the raw pointers inside OVERLAPPED are kernel identifiers, +// not thread-affine data; the registry mutex serialises all Rust-side +// access, and kernel-side writes only touch the UnsafeCell interiors. +unsafe impl Send for OvBlock {} + +impl OvBlock { + fn ov_ptr(&self) -> *mut OVERLAPPED { + self.ov.get() + } + + fn address(&self) -> usize { + self.ov.get() as usize + } + + fn h_event(&self) -> HANDLE { + // SAFETY: hEvent is only written GIL-side (construction). + unsafe { (*self.ov_ptr()).hEvent } + } + + /// `HasOverlappedIoCompleted` — volatile read because the kernel + /// flips `Internal` from `STATUS_PENDING` on completion. + fn completed(&self) -> bool { + let internal = + unsafe { std::ptr::read_volatile(std::ptr::addr_of!((*self.ov_ptr()).Internal)) }; + internal != STATUS_PENDING + } + + /// overlapped.c `mark_as_completed`: a start call that failed with + /// `ERROR_BROKEN_PIPE` will never post a completion, so flag the + /// struct done (and signal the event) to keep `pending`/dealloc + /// truthful. + fn mark_as_completed(&self) { + unsafe { + std::ptr::write_volatile(std::ptr::addr_of_mut!((*self.ov_ptr()).Internal), 0); + } + let ev = self.h_event(); + if !ev.is_null() { + unsafe { SetEvent(ev) }; + } + } +} + +/// Process-global block registry, keyed by `OVERLAPPED` address. The +/// proactor thread runs `GetQueuedCompletionStatus` GIL-released while +/// other threads construct/destroy `Overlapped`s, so the table itself +/// takes a real mutex; block interiors are only touched with the GIL +/// held (plus the kernel through the `UnsafeCell`s). +fn registry() -> &'static parking_lot::Mutex>> { + static REGISTRY: std::sync::OnceLock>>> = + std::sync::OnceLock::new(); + REGISTRY.get_or_init(|| parking_lot::Mutex::new(HashMap::new())) +} + +// --------------------------------------------------------------------------- +// The Overlapped type. +// --------------------------------------------------------------------------- + +fn overlapped_type() -> Rc { + let bt = crate::builtin_types::builtin_types(); + let mut td = DictData::default(); + for (name, f) in [ + ( + "getresult", + ov_getresult as fn(&[Object]) -> Result, + ), + ("cancel", ov_cancel), + ("ReadFile", ov_read_file), + ("ReadFileInto", ov_read_file_into), + ("WSARecv", ov_wsa_recv), + ("WSARecvInto", ov_wsa_recv_into), + ("WSARecvFrom", ov_wsa_recv_from), + ("WSARecvFromInto", ov_wsa_recv_from_into), + ("WriteFile", ov_write_file), + ("WSASend", ov_wsa_send), + ("WSASendTo", ov_wsa_send_to), + ("AcceptEx", ov_accept_ex), + ("ConnectEx", ov_connect_ex), + ("DisconnectEx", ov_disconnect_ex), + ("TransmitFile", ov_transmit_file), + ("ConnectNamedPipe", ov_connect_named_pipe), + ("__del__", ov_del), + ] { + td.insert(DictKey(Object::from_static(name)), method(name, f)); + } + // CPython exposes `error`/`event` as members and `address`/ + // `pending` as getsets; all four are dynamic reads of the block. + for (name, getter) in [ + ( + "address", + ov_get_address as fn(&[Object]) -> Result, + ), + ("pending", ov_get_pending), + ("error", ov_get_error), + ("event", ov_get_event), + ] { + td.insert( + DictKey(Object::from_static(name)), + Object::Property(Rc::new(PyProperty::new( + method(name, getter), + Object::None, + Object::None, + Object::None, + ))), + ); + } + td.insert( + DictKey(Object::from_static("__module__")), + Object::from_static("_overlapped"), + ); + // Construction lives in __new__ (CPython's tp_new); __init__ is a + // permissive no-op so `type.__call__`'s argument pass-through does + // not trip object.__init__ arity checks (same shape as mmap.mmap). + td.insert( + DictKey(Object::from_static("__new__")), + Object::StaticMethod(MethodWrapper::new(Object::Builtin(Rc::new(BuiltinFn { + name: "Overlapped.__new__", + binds_instance: false, + call: Box::new(|args| ov_new(args, &[])), + call_kw: Some(Box::new(ov_new)), + })))), + ); + td.insert( + DictKey(Object::from_static("__init__")), + Object::Builtin(Rc::new(BuiltinFn { + name: "__init__", + binds_instance: true, + call: Box::new(|_args| Ok(Object::None)), + call_kw: Some(Box::new(|_args, _kwargs| Ok(Object::None))), + })), + ); + TypeObject::new_with_flags( + "Overlapped", + vec![bt.object_.clone()], + td, + TypeFlags { + is_exception: false, + is_builtin: true, + }, + ) + .expect("_overlapped.Overlapped must linearise") +} + +/// `Overlapped(event=INVALID_HANDLE_VALUE)`: the sentinel default means +/// "make me a manual-reset, non-signalled event"; `NULL` (what asyncio +/// passes — completion arrives through the port) means no event at all. +fn ov_new(args: &[Object], kwargs: &[(String, Object)]) -> Result { + let Some(Object::Type(cls)) = args.first() else { + return Err(type_error("Overlapped.__new__(X): X is not a type object")); + }; + if args.len() > 2 { + return Err(type_error("Overlapped() takes at most 1 argument")); + } + let mut event_obj = args.get(1).cloned(); + for (k, v) in kwargs { + if k == "event" { + if event_obj.is_some() { + return Err(type_error( + "argument for Overlapped() given by name ('event') and position (1)", + )); + } + event_obj = Some(v.clone()); + } else { + return Err(type_error(format!( + "'{k}' is an invalid keyword argument for Overlapped()" + ))); + } + } + let mut event = match event_obj { + Some(o) => uintptr_arg(Some(&o), "event")?, + None => usize::MAX, // INVALID_HANDLE_VALUE + }; + if event == usize::MAX { + let created = unsafe { CreateEventW(std::ptr::null(), 1, 0, std::ptr::null()) }; + if created.is_null() { + return Err(last_win32_error_to_py(None)); + } + event = created as usize; + } + + let mut ov = OVERLAPPED::default(); + ov.hEvent = event as HANDLE; + let block = Box::new(OvBlock { + ov: UnsafeCell::new(ov), + handle: 0, + error: 0, + op: Op::None, + }); + let address = block.address(); + registry().lock().insert(address, block); + + let inst = Rc::new(PyInstance::new(cls.clone())); + inst.dict + .borrow_mut() + .insert(DictKey(Object::from_static("_address")), uint_obj(address)); + Ok(Object::Instance(inst)) +} + +fn self_arg(args: &[Object]) -> Result, RuntimeError> { + match args.first() { + Some(Object::Instance(i)) => Ok(i.clone()), + _ => Err(type_error("Overlapped method: missing self")), + } +} + +/// The registry key of an instance's block, from the `_address` slot +/// minted at construction. +fn block_key(inst: &Rc) -> Result { + let addr = inst + .dict + .borrow() + .get(&DictKey(Object::from_static("_address"))) + .cloned(); + uintptr_arg(addr.as_ref(), "Overlapped address") + .map_err(|_| crate::error::os_error("Overlapped object has no native state")) +} + +/// Run `f` with the registry locked and the instance's block borrowed. +fn with_block( + args: &[Object], + f: impl FnOnce(&mut OvBlock) -> Result, +) -> Result { + let inst = self_arg(args)?; + let key = block_key(&inst)?; + let mut map = registry().lock(); + let block = map + .get_mut(&key) + .ok_or_else(|| crate::error::os_error("Overlapped object has no native state"))?; + f(block) +} + +// -- attribute getters ------------------------------------------------------- + +fn ov_get_address(args: &[Object]) -> Result { + with_block(args, |blk| Ok(uint_obj(blk.address()))) +} + +fn ov_get_pending(args: &[Object]) -> Result { + with_block(args, |blk| { + // overlapped.c Overlapped_getpending: in flight and the start + // did not fail. A never-attempted Overlapped reads "completed" + // (Internal is zero), so `pending` is False, as in CPython. + Ok(Object::Bool( + !blk.completed() && !matches!(blk.op, Op::NotStarted), + )) + }) +} + +fn ov_get_error(args: &[Object]) -> Result { + with_block(args, |blk| Ok(Object::Int(i64::from(blk.error)))) +} + +fn ov_get_event(args: &[Object]) -> Result { + with_block(args, |blk| Ok(uint_obj(blk.h_event() as usize))) +} + +// -- lifecycle ---------------------------------------------------------------- + +/// overlapped.c `Overlapped_dealloc`: an in-flight operation must be +/// cancelled and *drained* before its memory can be released — the +/// kernel owns pointers into the block until then. +fn ov_del(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let Ok(key) = block_key(&inst) else { + return Ok(Object::None); + }; + let Some(block) = registry().lock().remove(&key) else { + return Ok(Object::None); + }; + if !block.completed() && block.op.attempted() && !matches!(block.op, Op::NotStarted) { + let handle = block.handle as HANDLE; + let ov_ptr = block.ov_ptr(); + let drained = crate::gil::allow_threads_then(|| { + let mut wait = 0; + if unsafe { CancelIoEx(handle, ov_ptr) } != 0 { + wait = 1; + } + let mut bytes = 0u32; + let ret = unsafe { GetOverlappedResult(handle, ov_ptr, &raw mut bytes, wait) }; + let err = if ret != 0 { + ERROR_SUCCESS + } else { + unsafe { GetLastError() } + }; + matches!( + err, + ERROR_SUCCESS | ERROR_NOT_FOUND | ERROR_OPERATION_ABORTED + ) + }); + if !drained { + // CPython prints an unraisable "still has pending operation + // at deallocation, the process may crash" and frees anyway. + // Leaking the block (event handle included) is strictly + // safer: the kernel may still write through its pointers. + std::mem::forget(block); + return Ok(Object::None); + } + } + let ev = block.h_event(); + if !ev.is_null() { + unsafe { CloseHandle(ev) }; + } + Ok(Object::None) +} + +// -- getresult / cancel -------------------------------------------------------- + +fn ov_getresult(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let wait = bool_arg(args.get(1), false); + let key = block_key(&inst)?; + + // Snapshot the raw pointers under the lock, then release it for the + // (possibly blocking, GIL-released) GetOverlappedResult. The block + // cannot vanish meanwhile: `inst` holds it live through `_address` + // and `ov_del` only runs at refcount zero. + let (handle, ov_ptr) = { + let mut map = registry().lock(); + let block = map + .get_mut(&key) + .ok_or_else(|| crate::error::os_error("Overlapped object has no native state"))?; + match block.op { + Op::None => return Err(value_error("operation not yet attempted")), + Op::NotStarted => return Err(value_error("operation failed to start")), + _ => {} + } + (block.handle as HANDLE, block.ov_ptr()) + }; + + let mut transferred = 0u32; + let ret = crate::gil::allow_threads_then(|| unsafe { + GetOverlappedResult(handle, ov_ptr, &raw mut transferred, i32::from(wait)) + }); + let err = if ret != 0 { + ERROR_SUCCESS + } else { + unsafe { GetLastError() } + }; + + // Pull the target object (for the *Into ops) before relocking. + let target = inst + .dict + .borrow() + .get(&DictKey(Object::from_static("_ov_target"))) + .cloned(); + + let mut map = registry().lock(); + let block = map + .get_mut(&key) + .ok_or_else(|| crate::error::os_error("Overlapped object has no native state"))?; + block.error = err; + let broken_pipe_ok = matches!( + block.op, + Op::Read { .. } | Op::ReadInto { .. } | Op::ReadFrom { .. } + ); + match err { + ERROR_SUCCESS | ERROR_MORE_DATA => {} + // A broken pipe on a read means clean EOF-ish data (possibly + // empty) for the read families; everything else raises. For + // ReadFromInto CPython only tolerates it once a result tuple was + // already built — first call raises, which is what this mirrors. + ERROR_BROKEN_PIPE if broken_pipe_ok => {} + _ => return Err(win32_error_to_py(err as i32, None)), + } + + let n = transferred as usize; + match &block.op { + Op::Read { buf } => Ok(Object::Bytes(buf[..n.min(buf.len())].to_vec().into())), + Op::ReadInto { buf } => { + if let Some(t) = &target { + copy_out(t, &buf[..n.min(buf.len())]); + } + Ok(Object::Int(i64::from(transferred))) + } + Op::ReadFrom { buf, addr } => { + let sa = unsafe { *addr.sa.get() }; + Ok(Object::new_tuple(vec![ + Object::Bytes(buf[..n.min(buf.len())].to_vec().into()), + unparse_address(&sa)?, + ])) + } + Op::ReadFromInto { buf, addr } => { + if let Some(t) = &target { + copy_out(t, &buf[..n.min(buf.len())]); + } + let sa = unsafe { *addr.sa.get() }; + Ok(Object::new_tuple(vec![ + Object::Int(i64::from(transferred)), + unparse_address(&sa)?, + ])) + } + _ => Ok(Object::Int(i64::from(transferred))), + } +} + +fn ov_cancel(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let key = block_key(&inst)?; + let (handle, ov_ptr, skip) = { + let map = registry().lock(); + let block = map + .get(&key) + .ok_or_else(|| crate::error::os_error("Overlapped object has no native state"))?; + let skip = matches!(block.op, Op::NotStarted) || block.completed(); + (block.handle as HANDLE, block.ov_ptr(), skip) + }; + if skip { + return Ok(Object::None); + } + let ret = crate::gil::allow_threads_then(|| unsafe { CancelIoEx(handle, ov_ptr) }); + // ERROR_NOT_FOUND: the I/O completed in-between — not an error. + if ret == 0 { + let err = unsafe { GetLastError() }; + if err != ERROR_NOT_FOUND { + return Err(win32_error_to_py(err as i32, None)); + } + } + Ok(Object::None) +} + +// -- operation starters --------------------------------------------------------- + +/// Stage an operation: verify no prior attempt, record handle + kind +/// (with its pinned buffers) and hand back the raw pointers the actual +/// syscall needs. Setting `op` *before* the GIL-released syscall is +/// what makes a concurrent second start observe "already attempted", +/// same as CPython setting `self->type` pre-`Py_BEGIN_ALLOW_THREADS`. +fn stage_op( + inst: &Rc, + handle: usize, + op: Op, +) -> Result<(usize, *mut OVERLAPPED), RuntimeError> { + let key = block_key(inst)?; + let mut map = registry().lock(); + let block = map + .get_mut(&key) + .ok_or_else(|| crate::error::os_error("Overlapped object has no native state"))?; + if block.op.attempted() { + return Err(value_error("operation already attempted")); + } + block.handle = handle; + block.op = op; + Ok((key, block.ov_ptr())) +} + +/// Raw pointer/length of an `Op`-owned buffer (queried back from the +/// staged block so the pointer is the one the kernel will keep). +fn staged_buf(key: usize) -> (*mut u8, u32) { + let mut map = registry().lock(); + let block = map.get_mut(&key).expect("staged block must exist"); + match &mut block.op { + Op::Read { buf } + | Op::ReadInto { buf } + | Op::Write { _pinned: buf } + | Op::Accept { _pinned: buf } + | Op::ReadFrom { buf, .. } + | Op::ReadFromInto { buf, .. } => (buf.as_mut_ptr(), buf.len() as u32), + _ => (std::ptr::null_mut(), 0), + } +} + +/// Record the start-call verdict, shared by every starter: `PENDING`/ +/// success family returns `None` to Python; a broken pipe on the read +/// family is marked completed then raised (BrokenPipeError via the +/// errmap — the proactor's `except BrokenPipeError` path); any other +/// error clears the op to NOT_STARTED (buffers freed, kernel holds +/// nothing) and raises. +fn finish_start( + key: usize, + err: u32, + broken_pipe_completes: bool, + ok: Object, +) -> Result { + let mut map = registry().lock(); + let block = map.get_mut(&key).expect("staged block must exist"); + block.error = err; + match err { + ERROR_BROKEN_PIPE if broken_pipe_completes => { + block.mark_as_completed(); + Err(win32_error_to_py(err as i32, None)) + } + ERROR_SUCCESS | ERROR_IO_PENDING => Ok(ok), + ERROR_MORE_DATA if broken_pipe_completes => Ok(ok), + _ => { + block.op = Op::NotStarted; + Err(win32_error_to_py(err as i32, None)) + } + } +} + +/// Pin the user buffer object on the instance for the operation +/// lifetime (`*Into` ops) so it cannot be collected while pending. +fn pin_target(inst: &Rc, target: &Object) { + inst.dict + .borrow_mut() + .insert(DictKey(Object::from_static("_ov_target")), target.clone()); +} + +fn ov_read_file(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let handle = uintptr_arg(args.get(1), "handle")?; + let size = dword_arg(args.get(2), "size")?; + // CPython allocates max(size, 1) but issues the read for `size` + // (a zero-byte overlapped read is valid). + let buf = vec![0u8; (size as usize).max(1)]; + let (key, ov_ptr) = stage_op(&inst, handle, Op::Read { buf })?; + let (ptr, _) = staged_buf(key); + let mut nread = 0u32; + let ret = crate::gil::allow_threads_then(|| unsafe { + ReadFile(handle as HANDLE, ptr, size, &raw mut nread, ov_ptr) + }); + let err = if ret != 0 { + ERROR_SUCCESS + } else { + unsafe { GetLastError() } + }; + finish_start(key, err, true, Object::None) +} + +fn ov_read_file_into(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let handle = uintptr_arg(args.get(1), "handle")?; + let target = args + .get(2) + .ok_or_else(|| type_error("ReadFileInto() missing buffer argument"))? + .clone(); + let len = writable_len(&target, "ReadFileInto")?; + let buf = vec![0u8; len.max(1)]; + pin_target(&inst, &target); + let (key, ov_ptr) = stage_op(&inst, handle, Op::ReadInto { buf })?; + let (ptr, _) = staged_buf(key); + let mut nread = 0u32; + let ret = crate::gil::allow_threads_then(|| unsafe { + ReadFile(handle as HANDLE, ptr, len as u32, &raw mut nread, ov_ptr) + }); + let err = if ret != 0 { + ERROR_SUCCESS + } else { + unsafe { GetLastError() } + }; + finish_start(key, err, true, Object::None) +} + +fn ov_wsa_recv(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let handle = uintptr_arg(args.get(1), "handle")?; + let size = dword_arg(args.get(2), "size")?; + let mut flags = dword_arg(args.get(3), "flags").unwrap_or(0); + let buf = vec![0u8; (size as usize).max(1)]; + let (key, ov_ptr) = stage_op(&inst, handle, Op::Read { buf })?; + let (ptr, _) = staged_buf(key); + let wsabuf = ws::WSABUF { + len: size, + buf: ptr, + }; + let mut nread = 0u32; + let ret = crate::gil::allow_threads_then(|| unsafe { + ws::WSARecv( + handle, + &raw const wsabuf, + 1, + &raw mut nread, + &raw mut flags, + ov_ptr, + None, + ) + }); + let err = wsa_start_err(ret); + finish_start(key, err, true, Object::None) +} + +fn ov_wsa_recv_into(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let handle = uintptr_arg(args.get(1), "handle")?; + let target = args + .get(2) + .ok_or_else(|| type_error("WSARecvInto() missing buffer argument"))? + .clone(); + let mut flags = dword_arg(args.get(3), "flags")?; + let len = writable_len(&target, "WSARecvInto")?; + let buf = vec![0u8; len.max(1)]; + pin_target(&inst, &target); + let (key, ov_ptr) = stage_op(&inst, handle, Op::ReadInto { buf })?; + let (ptr, _) = staged_buf(key); + let wsabuf = ws::WSABUF { + len: len as u32, + buf: ptr, + }; + let mut nread = 0u32; + let ret = crate::gil::allow_threads_then(|| unsafe { + ws::WSARecv( + handle, + &raw const wsabuf, + 1, + &raw mut nread, + &raw mut flags, + ov_ptr, + None, + ) + }); + let err = wsa_start_err(ret); + finish_start(key, err, true, Object::None) +} + +fn ov_wsa_recv_from(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let handle = uintptr_arg(args.get(1), "handle")?; + let size = dword_arg(args.get(2), "size")?; + let mut flags = dword_arg(args.get(3), "flags").unwrap_or(0); + let buf = vec![0u8; (size as usize).max(1)]; + let (key, ov_ptr) = stage_op( + &inst, + handle, + Op::ReadFrom { + buf, + addr: FromAddr::new(), + }, + )?; + let (ptr, _) = staged_buf(key); + let (sa_ptr, len_ptr) = staged_from_addr(key); + let wsabuf = ws::WSABUF { + len: size, + buf: ptr, + }; + let mut nread = 0u32; + let ret = crate::gil::allow_threads_then(|| unsafe { + ws::WSARecvFrom( + handle, + &raw const wsabuf, + 1, + &raw mut nread, + &raw mut flags, + sa_ptr, + len_ptr, + ov_ptr, + None, + ) + }); + let err = wsa_start_err(ret); + finish_start(key, err, true, Object::None) +} + +fn ov_wsa_recv_from_into(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let handle = uintptr_arg(args.get(1), "handle")?; + let target = args + .get(2) + .ok_or_else(|| type_error("WSARecvFromInto() missing buffer argument"))? + .clone(); + let size = dword_arg(args.get(3), "size")?; + let mut flags = dword_arg(args.get(4), "flags").unwrap_or(0); + let len = writable_len(&target, "WSARecvFromInto")?; + if len < size as usize { + return Err(value_error( + "nbytes is greater than the length of the buffer", + )); + } + let buf = vec![0u8; (size as usize).max(1)]; + pin_target(&inst, &target); + let (key, ov_ptr) = stage_op( + &inst, + handle, + Op::ReadFromInto { + buf, + addr: FromAddr::new(), + }, + )?; + let (ptr, _) = staged_buf(key); + let (sa_ptr, len_ptr) = staged_from_addr(key); + let wsabuf = ws::WSABUF { + len: size, + buf: ptr, + }; + let mut nread = 0u32; + let ret = crate::gil::allow_threads_then(|| unsafe { + ws::WSARecvFrom( + handle, + &raw const wsabuf, + 1, + &raw mut nread, + &raw mut flags, + sa_ptr, + len_ptr, + ov_ptr, + None, + ) + }); + let err = wsa_start_err(ret); + finish_start(key, err, true, Object::None) +} + +/// Raw pointers to a staged `ReadFrom(Into)`'s address slots — fetched +/// from the block in place so they are the addresses the kernel keeps. +fn staged_from_addr(key: usize) -> (*mut ws::SOCKADDR, *mut i32) { + let map = registry().lock(); + let block = map.get(&key).expect("staged block must exist"); + match &block.op { + Op::ReadFrom { addr, .. } | Op::ReadFromInto { addr, .. } => { + (addr.sa.get().cast::(), addr.len.get()) + } + _ => (std::ptr::null_mut(), std::ptr::null_mut()), + } +} + +fn ov_write_file(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let handle = uintptr_arg(args.get(1), "handle")?; + let data = bytes_like(args.get(2), "WriteFile")?; + let len = data.len() as u32; + let (key, ov_ptr) = stage_op(&inst, handle, Op::Write { _pinned: data })?; + let (ptr, _) = staged_buf(key); + let mut written = 0u32; + let ret = crate::gil::allow_threads_then(|| unsafe { + WriteFile(handle as HANDLE, ptr, len, &raw mut written, ov_ptr) + }); + let err = if ret != 0 { + ERROR_SUCCESS + } else { + unsafe { GetLastError() } + }; + finish_start(key, err, false, Object::None) +} + +fn ov_wsa_send(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let handle = uintptr_arg(args.get(1), "handle")?; + let data = bytes_like(args.get(2), "WSASend")?; + let flags = dword_arg(args.get(3), "flags")?; + let len = data.len() as u32; + let (key, ov_ptr) = stage_op(&inst, handle, Op::Write { _pinned: data })?; + let (ptr, _) = staged_buf(key); + let wsabuf = ws::WSABUF { len, buf: ptr }; + let mut written = 0u32; + let ret = crate::gil::allow_threads_then(|| unsafe { + ws::WSASend( + handle, + &raw const wsabuf, + 1, + &raw mut written, + flags, + ov_ptr, + None, + ) + }); + let err = wsa_start_err(ret); + finish_start(key, err, false, Object::None) +} + +fn ov_wsa_send_to(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let handle = uintptr_arg(args.get(1), "handle")?; + let data = bytes_like(args.get(2), "WSASendTo")?; + let flags = dword_arg(args.get(3), "flags")?; + let addr = parse_address(args.get(4))?; + let len = data.len() as u32; + let (key, ov_ptr) = stage_op(&inst, handle, Op::Write { _pinned: data })?; + let (ptr, _) = staged_buf(key); + let wsabuf = ws::WSABUF { len, buf: ptr }; + let mut written = 0u32; + let ret = crate::gil::allow_threads_then(|| unsafe { + ws::WSASendTo( + handle, + &raw const wsabuf, + 1, + &raw mut written, + flags, + addr.as_ptr(), + addr.len(), + ov_ptr, + None, + ) + }); + let err = wsa_start_err(ret); + finish_start(key, err, false, Object::None) +} + +fn ov_accept_ex(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let listen = uintptr_arg(args.get(1), "listen_handle")?; + let accept = uintptr_arg(args.get(2), "accept_handle")?; + let fns = ext_fns()?; + let accept_ex = fns + .accept_ex + .ok_or_else(|| crate::error::os_error("AcceptEx extension function unavailable"))?; + // Address buffer per AcceptEx contract: (local + remote) each + // `sizeof(sockaddr) + 16`. windows_events fixes the accept socket + // up itself via SO_UPDATE_ACCEPT_CONTEXT, so the buffer is never + // parsed — it just has to exist and outlive the operation. + let single = std::mem::size_of::() as u32 + 16; + let buf = vec![0u8; (single as usize) * 2]; + let (key, ov_ptr) = stage_op(&inst, listen, Op::Accept { _pinned: buf })?; + let (ptr, _) = staged_buf(key); + let mut received = 0u32; + let ret = crate::gil::allow_threads_then(|| unsafe { + accept_ex( + listen, + accept, + ptr.cast::(), + 0, + single, + single, + &raw mut received, + ov_ptr, + ) + }); + let err = wsa_bool_err(ret); + finish_start(key, err, false, Object::None) +} + +fn ov_connect_ex(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let sock = uintptr_arg(args.get(1), "client_handle")?; + let addr = parse_address(args.get(2))?; + let fns = ext_fns()?; + let connect_ex = fns + .connect_ex + .ok_or_else(|| crate::error::os_error("ConnectEx extension function unavailable"))?; + let (key, ov_ptr) = stage_op(&inst, sock, Op::Connect)?; + let ret = crate::gil::allow_threads_then(|| unsafe { + connect_ex( + sock, + addr.as_ptr(), + addr.len(), + std::ptr::null(), + 0, + std::ptr::null_mut(), + ov_ptr, + ) + }); + let err = wsa_bool_err(ret); + finish_start(key, err, false, Object::None) +} + +fn ov_disconnect_ex(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let sock = uintptr_arg(args.get(1), "handle")?; + let flags = dword_arg(args.get(2), "flags")?; + let fns = ext_fns()?; + let disconnect_ex = fns + .disconnect_ex + .ok_or_else(|| crate::error::os_error("DisconnectEx extension function unavailable"))?; + let (key, ov_ptr) = stage_op(&inst, sock, Op::Disconnect)?; + let ret = crate::gil::allow_threads_then(|| unsafe { disconnect_ex(sock, ov_ptr, flags, 0) }); + let err = wsa_bool_err(ret); + finish_start(key, err, false, Object::None) +} + +fn ov_transmit_file(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let sock = uintptr_arg(args.get(1), "socket")?; + let file = uintptr_arg(args.get(2), "file")?; + let offset = dword_arg(args.get(3), "offset")?; + let offset_high = dword_arg(args.get(4), "offset_high")?; + let count_to_write = dword_arg(args.get(5), "count_to_write")?; + let count_per_send = dword_arg(args.get(6), "count_per_send")?; + let flags = dword_arg(args.get(7), "flags")?; + let fns = ext_fns()?; + let transmit_file = fns + .transmit_file + .ok_or_else(|| crate::error::os_error("TransmitFile extension function unavailable"))?; + let (key, ov_ptr) = stage_op(&inst, sock, Op::TransmitFile)?; + // The file position rides in the OVERLAPPED itself. + unsafe { + (*ov_ptr).Anonymous.Anonymous.Offset = offset; + (*ov_ptr).Anonymous.Anonymous.OffsetHigh = offset_high; + } + let ret = crate::gil::allow_threads_then(|| unsafe { + transmit_file( + sock, + file as HANDLE, + count_to_write, + count_per_send, + ov_ptr, + std::ptr::null(), + flags, + ) + }); + let err = wsa_bool_err(ret); + finish_start(key, err, false, Object::None) +} + +fn ov_connect_named_pipe(args: &[Object]) -> Result { + let inst = self_arg(args)?; + let pipe = uintptr_arg(args.get(1), "handle")?; + let (key, ov_ptr) = stage_op(&inst, pipe, Op::ConnectNamedPipe)?; + let ret = crate::gil::allow_threads_then(|| unsafe { + windows_sys::Win32::System::Pipes::ConnectNamedPipe(pipe as HANDLE, ov_ptr) + }); + let err = if ret != 0 { + ERROR_SUCCESS + } else { + unsafe { GetLastError() } + }; + // ERROR_PIPE_CONNECTED = a client raced us and is already attached: + // report True (no completion will be posted — mark done), matching + // IocpProactor.accept_pipe's `if connected:` short-circuit. + if err == ERROR_PIPE_CONNECTED { + let mut map = registry().lock(); + let block = map.get_mut(&key).expect("staged block must exist"); + block.error = err; + block.mark_as_completed(); + return Ok(Object::Bool(true)); + } + finish_start(key, err, false, Object::Bool(false)) +} + +// --------------------------------------------------------------------------- +// Module-level functions. +// --------------------------------------------------------------------------- + +fn mod_create_io_completion_port(args: &[Object]) -> Result { + let handle = uintptr_arg(args.first(), "handle")?; + let port = uintptr_arg(args.get(1), "port")?; + let key = uintptr_arg(args.get(2), "key")?; + let concurrency = dword_arg(args.get(3), "concurrency")?; + let ret = crate::gil::allow_threads_then(|| unsafe { + CreateIoCompletionPort(handle as HANDLE, port as HANDLE, key, concurrency) + }); + if ret.is_null() { + return Err(last_win32_error_to_py(None)); + } + Ok(uint_obj(ret as usize)) +} + +fn mod_get_queued_completion_status(args: &[Object]) -> Result { + let port = uintptr_arg(args.first(), "port")?; + let ms = dword_arg(args.get(1), "msecs")?; + let mut bytes = 0u32; + let mut key = 0usize; + let mut ov: *mut OVERLAPPED = std::ptr::null_mut(); + // The proactor blocks here (up to `ms`, possibly INFINITE) — the + // GIL must be released or every other Python thread stalls. + let ret = crate::gil::allow_threads_then(|| unsafe { + GetQueuedCompletionStatus( + port as HANDLE, + &raw mut bytes, + &raw mut key, + &raw mut ov, + ms, + ) + }); + let err = if ret != 0 { + ERROR_SUCCESS + } else { + unsafe { GetLastError() } + }; + if ov.is_null() { + // No packet: timeout is None, anything else is a real failure. + if err == WAIT_TIMEOUT { + return Ok(Object::None); + } + return Err(win32_error_to_py(err as i32, None)); + } + Ok(Object::new_tuple(vec![ + Object::Int(i64::from(err)), + Object::Int(i64::from(bytes)), + uint_obj(key), + uint_obj(ov as usize), + ])) +} + +fn mod_post_queued_completion_status(args: &[Object]) -> Result { + let port = uintptr_arg(args.first(), "port")?; + let bytes = dword_arg(args.get(1), "bytes")?; + let key = uintptr_arg(args.get(2), "key")?; + let address = uintptr_arg(args.get(3), "address")?; + let ret = crate::gil::allow_threads_then(|| unsafe { + PostQueuedCompletionStatus(port as HANDLE, bytes, key, address as *const OVERLAPPED) + }); + if ret == 0 { + return Err(last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +fn mod_format_message(args: &[Object]) -> Result { + let code = dword_arg(args.first(), "error_code")?; + Ok(Object::from_str(crate::stdlib::nt_support::format_message( + code as i32, + ))) +} + +/// Context handed to the OS wait callback. Heap-allocated per +/// registration and freed *by the callback* (CPython PyMem_RawMalloc / +/// PostToQueueCallback PyMem_RawFree). If the wait is unregistered +/// before it ever fires, the allocation leaks — exactly as in CPython, +/// where UnregisterWait(Ex) has no way to reclaim it either. +struct PostCallbackData { + port: usize, + overlapped: usize, +} + +/// CPython's `PostToQueueCallback`: runs on an OS thread-pool thread +/// with no GIL, so it must not touch Python state — it only forwards +/// the wait outcome into the completion port (`bytes` = whether the +/// wait timed out, key = 0, and the caller's OVERLAPPED address). +unsafe extern "system" fn post_to_queue_callback(param: *mut c_void, timer_or_wait_fired: bool) { + // SAFETY: `param` is the Box leaked by RegisterWaitWithQueue; + // WT_EXECUTEONLYONCE guarantees a single invocation. + let data = unsafe { Box::from_raw(param.cast::()) }; + unsafe { + // Errors deliberately ignored, like CPython's comment says. + PostQueuedCompletionStatus( + data.port as HANDLE, + u32::from(timer_or_wait_fired), + 0, + data.overlapped as *const OVERLAPPED, + ); + } +} + +fn mod_register_wait_with_queue(args: &[Object]) -> Result { + let object = uintptr_arg(args.first(), "Object")?; + let port = uintptr_arg(args.get(1), "CompletionPort")?; + let overlapped = uintptr_arg(args.get(2), "Overlapped")?; + let ms = dword_arg(args.get(3), "Timeout")?; + let pdata = Box::into_raw(Box::new(PostCallbackData { port, overlapped })); + let mut wait_handle: HANDLE = std::ptr::null_mut(); + let ret = unsafe { + RegisterWaitForSingleObject( + &raw mut wait_handle, + object as HANDLE, + Some(post_to_queue_callback), + pdata.cast::(), + ms, + WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE, + ) + }; + if ret == 0 { + let err = last_win32_error_to_py(None); + // The callback will never run; reclaim its context. + drop(unsafe { Box::from_raw(pdata) }); + return Err(err); + } + Ok(uint_obj(wait_handle as usize)) +} + +fn mod_unregister_wait(args: &[Object]) -> Result { + let wait = uintptr_arg(args.first(), "WaitHandle")?; + let ret = crate::gil::allow_threads_then(|| unsafe { UnregisterWait(wait as HANDLE) }); + if ret == 0 { + return Err(last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +fn mod_unregister_wait_ex(args: &[Object]) -> Result { + let wait = uintptr_arg(args.first(), "WaitHandle")?; + let event = uintptr_arg(args.get(1), "Event")?; + let ret = crate::gil::allow_threads_then(|| unsafe { + UnregisterWaitEx(wait as HANDLE, event as HANDLE) + }); + if ret == 0 { + return Err(last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +fn mod_create_event(args: &[Object]) -> Result { + if !matches!(args.first(), Some(Object::None)) { + return Err(value_error("EventAttributes must be None")); + } + let manual_reset = bool_arg(args.get(1), false); + let initial_state = bool_arg(args.get(2), false); + let name_wide = match args.get(3) { + None | Some(Object::None) => None, + Some(Object::Str(s)) => Some(wide(s)), + Some(other) => { + return Err(type_error(format!( + "CreateEvent() argument 4 must be str or None, not {}", + other.type_name_owned() + ))) + } + }; + let name_ptr = name_wide.as_ref().map_or(std::ptr::null(), |w| w.as_ptr()); + let event = crate::gil::allow_threads_then(|| unsafe { + CreateEventW( + std::ptr::null(), + i32::from(manual_reset), + i32::from(initial_state), + name_ptr, + ) + }); + if event.is_null() { + return Err(last_win32_error_to_py(None)); + } + Ok(uint_obj(event as usize)) +} + +fn mod_set_event(args: &[Object]) -> Result { + let handle = uintptr_arg(args.first(), "Handle")?; + let ret = crate::gil::allow_threads_then(|| unsafe { SetEvent(handle as HANDLE) }); + if ret == 0 { + return Err(last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +fn mod_reset_event(args: &[Object]) -> Result { + let handle = uintptr_arg(args.first(), "Handle")?; + let ret = crate::gil::allow_threads_then(|| unsafe { ResetEvent(handle as HANDLE) }); + if ret == 0 { + return Err(last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +/// Bind to an arbitrary local port without a getaddrinfo round-trip — +/// ConnectEx requires a bound socket. CPython binds the wildcard +/// address (INADDR_ANY / in6addr_any), port 0. +fn mod_bind_local(args: &[Object]) -> Result { + let sock = uintptr_arg(args.first(), "handle")?; + let family = match args.get(1) { + Some(Object::Int(n)) => *n, + Some(Object::Bool(v)) => i64::from(*v), + _ => return Err(type_error("family must be an int")), + }; + let ret = if family == i64::from(ws::AF_INET) { + let mut sa: ws::SOCKADDR_IN = unsafe { std::mem::zeroed() }; + sa.sin_family = ws::AF_INET; + unsafe { + ws::bind( + sock, + std::ptr::from_ref(&sa).cast(), + std::mem::size_of::() as i32, + ) + } + } else if family == i64::from(ws::AF_INET6) { + let mut sa: ws::SOCKADDR_IN6 = unsafe { std::mem::zeroed() }; + sa.sin6_family = ws::AF_INET6; + unsafe { + ws::bind( + sock, + std::ptr::from_ref(&sa).cast(), + std::mem::size_of::() as i32, + ) + } + } else { + // CPython reuses parse_address's message here, oddly; mirrored. + return Err(value_error("expected tuple of length 2 or 4")); + }; + if ret == ws::SOCKET_ERROR { + return Err(win32_error_to_py(unsafe { ws::WSAGetLastError() }, None)); + } + Ok(Object::None) +} + +/// Blocking connect for connectionless (UDP) sockets — WSAConnect on a +/// datagram socket completes immediately, which is why the proactor +/// skips IOCP registration for it. +fn mod_wsa_connect(args: &[Object]) -> Result { + let sock = uintptr_arg(args.first(), "client_handle")?; + let addr = parse_address(args.get(1))?; + let ret = crate::gil::allow_threads_then(|| unsafe { + ws::WSAConnect( + sock, + addr.as_ptr(), + addr.len(), + std::ptr::null(), + std::ptr::null_mut(), + std::ptr::null(), + std::ptr::null(), + ) + }); + if ret == ws::SOCKET_ERROR { + return Err(win32_error_to_py(unsafe { ws::WSAGetLastError() }, None)); + } + Ok(Object::None) +} + +/// Open the client end of a named pipe for overlapped I/O. There is no +/// overlapped connect for pipe clients, so `IocpProactor.connect_pipe` +/// retries this in a delay loop while it fails with ERROR_PIPE_BUSY. +fn mod_connect_pipe(args: &[Object]) -> Result { + let address = match args.first() { + Some(Object::Str(s)) => wide(s), + _ => return Err(type_error("ConnectPipe() argument must be str")), + }; + let handle = crate::gil::allow_threads_then(|| unsafe { + CreateFileW( + address.as_ptr(), + GENERIC_READ | GENERIC_WRITE, + 0, + std::ptr::null(), + OPEN_EXISTING, + FILE_FLAG_OVERLAPPED, + std::ptr::null_mut(), + ) + }); + if handle == windows_sys::Win32::Foundation::INVALID_HANDLE_VALUE { + return Err(last_win32_error_to_py(None)); + } + Ok(uint_obj(handle as usize)) +} diff --git a/crates/weavepy-vm/src/stdlib/pyexpat_mod.rs b/crates/weavepy-vm/src/stdlib/pyexpat_mod.rs index 77bb57ec..16047840 100644 --- a/crates/weavepy-vm/src/stdlib/pyexpat_mod.rs +++ b/crates/weavepy-vm/src/stdlib/pyexpat_mod.rs @@ -907,7 +907,9 @@ fn error_string_for(code: c_int) -> Option { /// Raise `ExpatError` for the parser's current error state (`set_error`). fn set_error(st: &StateRef, code: c_int) -> RuntimeError { let parser = st.borrow().parser(); - // SAFETY: live parser handle. + // SAFETY: live parser handle. `XML_Size` is u64 on unix builds but u32 on + // windows-gnu, so a lossless `From` conversion isn't portable here. + #[allow(clippy::cast_lossless)] let (lineno, column) = unsafe { ( ex::XML_GetCurrentLineNumber(parser) as i64, @@ -1261,19 +1263,23 @@ fn parser_type() -> Rc { // Live position / error attributes (pyexpat.c getsets). getset(&cls, "CurrentLineNumber", |args| { let p = state_of_args(args)?.borrow().parser(); - Ok(Object::Int( - unsafe { ex::XML_GetCurrentLineNumber(p) } as i64 - )) + // `XML_Size` is u64 on unix builds but u32 on windows-gnu. + #[allow(clippy::cast_lossless)] + let line = unsafe { ex::XML_GetCurrentLineNumber(p) } as i64; + Ok(Object::Int(line)) }); getset(&cls, "CurrentColumnNumber", |args| { let p = state_of_args(args)?.borrow().parser(); - Ok(Object::Int( - unsafe { ex::XML_GetCurrentColumnNumber(p) } as i64 - )) + #[allow(clippy::cast_lossless)] // XML_Size width differs per platform + let col = unsafe { ex::XML_GetCurrentColumnNumber(p) } as i64; + Ok(Object::Int(col)) }); getset(&cls, "CurrentByteIndex", |args| { let p = state_of_args(args)?.borrow().parser(); - Ok(Object::Int(unsafe { ex::XML_GetCurrentByteIndex(p) } as i64)) + // `XML_Index` is c_long: i64 on unix hosts, i32 on windows-gnu. + #[allow(clippy::cast_lossless, clippy::unnecessary_cast)] + let idx = unsafe { ex::XML_GetCurrentByteIndex(p) } as i64; + Ok(Object::Int(idx)) }); getset(&cls, "ErrorCode", |args| { let p = state_of_args(args)?.borrow().parser(); @@ -1281,19 +1287,21 @@ fn parser_type() -> Rc { }); getset(&cls, "ErrorLineNumber", |args| { let p = state_of_args(args)?.borrow().parser(); - Ok(Object::Int( - unsafe { ex::XML_GetCurrentLineNumber(p) } as i64 - )) + #[allow(clippy::cast_lossless)] // XML_Size width differs per platform + let line = unsafe { ex::XML_GetCurrentLineNumber(p) } as i64; + Ok(Object::Int(line)) }); getset(&cls, "ErrorColumnNumber", |args| { let p = state_of_args(args)?.borrow().parser(); - Ok(Object::Int( - unsafe { ex::XML_GetCurrentColumnNumber(p) } as i64 - )) + #[allow(clippy::cast_lossless)] // XML_Size width differs per platform + let col = unsafe { ex::XML_GetCurrentColumnNumber(p) } as i64; + Ok(Object::Int(col)) }); getset(&cls, "ErrorByteIndex", |args| { let p = state_of_args(args)?.borrow().parser(); - Ok(Object::Int(unsafe { ex::XML_GetCurrentByteIndex(p) } as i64)) + #[allow(clippy::cast_lossless, clippy::unnecessary_cast)] // c_long width differs + let idx = unsafe { ex::XML_GetCurrentByteIndex(p) } as i64; + Ok(Object::Int(idx)) }); cls }) @@ -1886,9 +1894,12 @@ pub fn build(_cache: &ModuleCache) -> Rc { unsafe { let mut f = ex::XML_GetFeatureList(); while !f.is_null() && !(*f).name.is_null() && (*f).feature != 0 { + // Feature values are c_long: i64 on unix hosts, i32 on windows-gnu. + #[allow(clippy::cast_lossless, clippy::unnecessary_cast)] + let value = (*f).value as i64; features.push(Object::new_tuple(vec![ Object::from_str(cstr((*f).name)), - Object::Int((*f).value as i64), + Object::Int(value), ])); f = f.add(1); } diff --git a/crates/weavepy-vm/src/stdlib/python/_ctypes.py b/crates/weavepy-vm/src/stdlib/python/_ctypes.py index 31b32611..39c9fd40 100644 --- a/crates/weavepy-vm/src/stdlib/python/_ctypes.py +++ b/crates/weavepy-vm/src/stdlib/python/_ctypes.py @@ -106,6 +106,62 @@ def _dyld_shared_cache_contains_path(path): return _nat.dyld_shared_cache_contains_path(path) +if _sys.platform == "win32": + # The nt-only surface ctypes/__init__.py imports inside its + # `_os.name == "nt"` branches. All of it mirrors CPython's + # Modules/_ctypes/callproc.c module methods. + + def get_last_error(): + """Return ctypes' *private* per-thread copy of ``LastError`` — + the value the most recent ``use_last_error=True`` foreign call + swapped out (callproc.c ``get_last_error`` reads ``space[1]``, + never the thread's live ``GetLastError()``).""" + return _nat.get_last_error() + + def set_last_error(value): + """Set the private per-thread ``LastError`` copy, returning the + previous value (it will be swapped *in* as the real ``LastError`` + for the next ``use_last_error=True`` foreign call).""" + return _nat.set_last_error(value) + + def FormatError(code=None): + """Message text for a Win32 error code (``FormatMessageW``); with + no argument, the calling thread's real ``GetLastError()`` — exactly + CPython's ``format_error`` (callproc.c).""" + return _nat.format_error(code) + + def _check_HRESULT(result): + # CPython's check_hresult (callproc.c) raises via + # PyErr_SetFromWindowsErr when FAILED(hr) — i.e. the HRESULT is + # negative as a signed 32-bit int — and returns the value + # otherwise. We raise the same WinError-shaped OSError (winerror + # carries the HRESULT). Divergence note: ctypes' *COMError* (an + # HRESULT failure returned by a COM method call through a + # FUNCFLAG_HRESULT prototype) does not exist in WeavePy; OleDLL + # results route through this checker and get OSError instead. + if result < 0: + raise OSError(None, FormatError(result).strip(), None, result) + return result + + def CopyComPointer(src, dst): + """CPython implements this in Modules/_ctypes/callproc.c for COM + interop (AddRef the source, store it through ``dst``). WeavePy has + no COM object model, so this is a documented stub.""" + raise NotImplementedError( + "COM pointers are not supported by WeavePy") + + def LoadLibrary(name, load_flags=0): + """CPython's ``load_library`` (``LoadLibraryExW``-based, + callproc.c). ``load_flags`` is ctypes' ``winmode``; the native + loader currently applies plain ``LoadLibraryW`` default search + semantics and ignores the flag bits (RFC 0063 documents the + divergence).""" + return _nat.dlopen(name, load_flags) + + def FreeLibrary(handle): + _nat.dlclose(handle) + + # --------------------------------------------------------------------------- # StgInfo — per-type storage info (CPython's StgInfo struct) # --------------------------------------------------------------------------- @@ -2421,7 +2477,15 @@ def _ffi_invoke(addr, restype, argtypes, flags, args): raw = _nat.call_function(addr, rcode, codes, payloads, int(flags), n_fixed) if restype is None: return None - return _wrap_result(restype, raw) + result = _wrap_result(restype, raw) + # CPython's GetResult (callproc.c): a restype carrying _check_retval_ + # (ctypes.HRESULT -> _check_HRESULT) has the converted result passed + # through the checker, whose return value replaces it — this is how + # OleDLL turns FAILED HRESULTs into exceptions, before errcheck runs. + checker = getattr(restype, "_check_retval_", None) + if checker is not None: + result = checker(result) + return result def _coerce_payload(code, value): diff --git a/crates/weavepy-vm/src/stdlib/python/codecs.py b/crates/weavepy-vm/src/stdlib/python/codecs.py index 712a975c..94e0e9b0 100644 --- a/crates/weavepy-vm/src/stdlib/python/codecs.py +++ b/crates/weavepy-vm/src/stdlib/python/codecs.py @@ -51,6 +51,19 @@ unicode_escape_decode = _codecs.unicode_escape_decode readbuffer_encode = _codecs.readbuffer_encode +# Windows-only code-page entry points (RFC 0063). CPython's +# `from _codecs import *` picks these up only on win32 builds, where +# `encodings/mbcs.py` and `encodings/oem.py` import them from here. +try: + mbcs_encode = _codecs.mbcs_encode + mbcs_decode = _codecs.mbcs_decode + oem_encode = _codecs.oem_encode + oem_decode = _codecs.oem_decode + code_page_encode = _codecs.code_page_encode + code_page_decode = _codecs.code_page_decode +except AttributeError: + pass + _USER_CODECS = {} _ERROR_HANDLERS = {} diff --git a/crates/weavepy-vm/src/stdlib/python/encodings/mbcs.py b/crates/weavepy-vm/src/stdlib/python/encodings/mbcs.py new file mode 100644 index 00000000..9707e7fd --- /dev/null +++ b/crates/weavepy-vm/src/stdlib/python/encodings/mbcs.py @@ -0,0 +1,46 @@ +""" Python 'mbcs' Codec for Windows + +Cloned by Mark Hammond (mhammond@skippinet.com.au) from ascii.py, +which was written by Marc-Andre Lemburg (mal@lemburg.com). + +(c) Copyright CNRI, All Rights Reserved. NO WARRANTY. + +""" +# Import them explicitly to cause an ImportError +# on non-Windows systems +from codecs import mbcs_encode, mbcs_decode +# for IncrementalDecoder, IncrementalEncoder, ... +import codecs + +### Codec APIs + +encode = mbcs_encode + +def decode(input, errors='strict'): + return mbcs_decode(input, errors, True) + +class IncrementalEncoder(codecs.IncrementalEncoder): + def encode(self, input, final=False): + return mbcs_encode(input, self.errors)[0] + +class IncrementalDecoder(codecs.BufferedIncrementalDecoder): + _buffer_decode = mbcs_decode + +class StreamWriter(codecs.StreamWriter): + encode = mbcs_encode + +class StreamReader(codecs.StreamReader): + decode = mbcs_decode + +### encodings module API + +def getregentry(): + return codecs.CodecInfo( + name='mbcs', + encode=encode, + decode=decode, + incrementalencoder=IncrementalEncoder, + incrementaldecoder=IncrementalDecoder, + streamreader=StreamReader, + streamwriter=StreamWriter, + ) diff --git a/crates/weavepy-vm/src/stdlib/python/encodings/oem.py b/crates/weavepy-vm/src/stdlib/python/encodings/oem.py new file mode 100644 index 00000000..2c3426ba --- /dev/null +++ b/crates/weavepy-vm/src/stdlib/python/encodings/oem.py @@ -0,0 +1,41 @@ +""" Python 'oem' Codec for Windows + +""" +# Import them explicitly to cause an ImportError +# on non-Windows systems +from codecs import oem_encode, oem_decode +# for IncrementalDecoder, IncrementalEncoder, ... +import codecs + +### Codec APIs + +encode = oem_encode + +def decode(input, errors='strict'): + return oem_decode(input, errors, True) + +class IncrementalEncoder(codecs.IncrementalEncoder): + def encode(self, input, final=False): + return oem_encode(input, self.errors)[0] + +class IncrementalDecoder(codecs.BufferedIncrementalDecoder): + _buffer_decode = oem_decode + +class StreamWriter(codecs.StreamWriter): + encode = oem_encode + +class StreamReader(codecs.StreamReader): + decode = oem_decode + +### encodings module API + +def getregentry(): + return codecs.CodecInfo( + name='oem', + encode=encode, + decode=decode, + incrementalencoder=IncrementalEncoder, + incrementaldecoder=IncrementalDecoder, + streamreader=StreamReader, + streamwriter=StreamWriter, + ) diff --git a/crates/weavepy-vm/src/stdlib/python/nturl2path.py b/crates/weavepy-vm/src/stdlib/python/nturl2path.py new file mode 100644 index 00000000..757fd01b --- /dev/null +++ b/crates/weavepy-vm/src/stdlib/python/nturl2path.py @@ -0,0 +1,69 @@ +"""Convert a NT pathname to a file URL and vice versa. + +This module only exists to provide OS-specific code +for urllib.requests, thus do not use directly. +""" +# Testing is done through test_urllib. + +def url2pathname(url): + """OS-specific conversion from a relative URL of the 'file' scheme + to a file system path; not recommended for general use.""" + # e.g. + # ///C|/foo/bar/spam.foo + # and + # ///C:/foo/bar/spam.foo + # become + # C:\foo\bar\spam.foo + import string, urllib.parse + if url[:3] == '///': + # URL has an empty authority section, so the path begins on the third + # character. + url = url[2:] + elif url[:12] == '//localhost/': + # Skip past 'localhost' authority. + url = url[11:] + if url[:3] == '///': + # Skip past extra slash before UNC drive in URL path. + url = url[1:] + # Windows itself uses ":" even in URLs. + url = url.replace(':', '|') + if not '|' in url: + # No drive specifier, just convert slashes + # make sure not to convert quoted slashes :-) + return urllib.parse.unquote(url.replace('/', '\\')) + comp = url.split('|') + if len(comp) != 2 or comp[0][-1] not in string.ascii_letters: + error = 'Bad URL: ' + url + raise OSError(error) + drive = comp[0][-1].upper() + tail = urllib.parse.unquote(comp[1].replace('/', '\\')) + return drive + ':' + tail + +def pathname2url(p): + """OS-specific conversion from a file system path to a relative URL + of the 'file' scheme; not recommended for general use.""" + # e.g. + # C:\foo\bar\spam.foo + # becomes + # ///C:/foo/bar/spam.foo + import urllib.parse + # First, clean up some special forms. We are going to sacrifice + # the additional information anyway + p = p.replace('\\', '/') + if p[:4] == '//?/': + p = p[4:] + if p[:4].upper() == 'UNC/': + p = '//' + p[4:] + elif p[1:2] != ':': + raise OSError('Bad path: ' + p) + if not ':' in p: + # No DOS drive specified, just quote the pathname + return urllib.parse.quote(p) + comp = p.split(':', maxsplit=2) + if len(comp) != 2 or len(comp[0]) > 1: + error = 'Bad path: ' + p + raise OSError(error) + + drive = urllib.parse.quote(comp[0].upper()) + tail = urllib.parse.quote(comp[1]) + return '///' + drive + ':' + tail diff --git a/crates/weavepy-vm/src/stdlib/python/shutil.py b/crates/weavepy-vm/src/stdlib/python/shutil.py index f6ee79be..7df97201 100644 --- a/crates/weavepy-vm/src/stdlib/python/shutil.py +++ b/crates/weavepy-vm/src/stdlib/python/shutil.py @@ -40,13 +40,7 @@ import nt if sys.platform == 'win32': - try: - import _winapi - except ImportError: - # WeavePy does not ship the Windows-only `_winapi` accelerator. - # Fall back to the same `None` sentinel CPython uses off-Windows; - # the `_winapi` call sites below already guard for it. - _winapi = None + import _winapi else: _winapi = None diff --git a/crates/weavepy-vm/src/stdlib/python/subprocess.py b/crates/weavepy-vm/src/stdlib/python/subprocess.py index 4d7eaacb..34b4eef1 100644 --- a/crates/weavepy-vm/src/stdlib/python/subprocess.py +++ b/crates/weavepy-vm/src/stdlib/python/subprocess.py @@ -14,8 +14,17 @@ reads/writes (CPython's POSIX `_communicate`), so it never deadlocks on large output and honours `timeout`. -Where `_posixsubprocess` is unavailable (non-POSIX targets), we fall back -to the legacy `_subprocess.spawn` primitive so the surface still works. +On Windows (`os.name == "nt"`, RFC 0063 WS2) the CPython `_mswindows` arm +runs instead: `_winapi.CreateProcess` with a `STARTUPINFO`, inheritable +handle duplicates and an optional `lpAttributeList["handle_list"]`, +`_winapi.WaitForSingleObject` for waiting, and reader/writer threads for +`communicate()`. Its methods are defined at the *end* of `Popen` inside an +`if _mswindows:` block so they override the POSIX/portable definitions on +nt while leaving them untouched everywhere else. + +Where `_posixsubprocess` is unavailable (non-POSIX, non-NT targets), we +fall back to the legacy `_subprocess.spawn` primitive so the surface still +works. Surface: `Popen`, `run`, `call`, `check_call`, `check_output`, `getoutput`, `getstatusoutput`, `CompletedProcess`, `CalledProcessError`, @@ -34,6 +43,65 @@ _mswindows = (os.name == "nt") +if _mswindows: + # CPython Lib/subprocess.py `_mswindows` prologue. The constant + # re-exports, STARTUPINFO and Handle live in one block here (CPython + # splits them around its exception classes); `__all__` is extended at + # the bottom of this module, after `__all__` is defined. + import msvcrt + import _winapi + from _winapi import (CREATE_NEW_CONSOLE, CREATE_NEW_PROCESS_GROUP, + STD_INPUT_HANDLE, STD_OUTPUT_HANDLE, + STD_ERROR_HANDLE, SW_HIDE, + STARTF_USESTDHANDLES, STARTF_USESHOWWINDOW, + STARTF_FORCEONFEEDBACK, STARTF_FORCEOFFFEEDBACK, + ABOVE_NORMAL_PRIORITY_CLASS, BELOW_NORMAL_PRIORITY_CLASS, + HIGH_PRIORITY_CLASS, IDLE_PRIORITY_CLASS, + NORMAL_PRIORITY_CLASS, REALTIME_PRIORITY_CLASS, + CREATE_NO_WINDOW, DETACHED_PROCESS, + CREATE_DEFAULT_ERROR_MODE, CREATE_BREAKAWAY_FROM_JOB) + + class STARTUPINFO: + def __init__(self, *, dwFlags=0, hStdInput=None, hStdOutput=None, + hStdError=None, wShowWindow=0, lpAttributeList=None): + self.dwFlags = dwFlags + self.hStdInput = hStdInput + self.hStdOutput = hStdOutput + self.hStdError = hStdError + self.wShowWindow = wShowWindow + self.lpAttributeList = lpAttributeList or {"handle_list": []} + + def copy(self): + attr_list = self.lpAttributeList.copy() + if 'handle_list' in attr_list: + attr_list['handle_list'] = list(attr_list['handle_list']) + + return STARTUPINFO(dwFlags=self.dwFlags, + hStdInput=self.hStdInput, + hStdOutput=self.hStdOutput, + hStdError=self.hStdError, + wShowWindow=self.wShowWindow, + lpAttributeList=attr_list) + + class Handle(int): + closed = False + + def Close(self, CloseHandle=_winapi.CloseHandle): + if not self.closed: + self.closed = True + CloseHandle(self) + + def Detach(self): + if not self.closed: + self.closed = True + return int(self) + raise ValueError("already closed") + + def __repr__(self): + return "%s(%d)" % (self.__class__.__name__, int(self)) + + __del__ = Close + try: import _posixsubprocess _HAVE_FORK_EXEC = hasattr(_posixsubprocess, "fork_exec") and hasattr(os, "fork") @@ -384,6 +452,15 @@ def _cleanup(): pass +if _mswindows: + # On Windows the kernel frees the process once `Popen._handle` is + # closed, which `Handle.__del__` does when the Popen instance is + # finalized — there is no zombie to reap. CPython disables the + # bookkeeping by setting `_active = None`; `_cleanup()` above already + # no-ops in that case. + _active = None + + # ---------------------------------------------------------------------- # Popen. # ---------------------------------------------------------------------- @@ -447,7 +524,11 @@ def __init__(self, args, bufsize=-1, executable=None, stdin=None, self.encoding = encoding = _text_encoding() self.args = args - if not _mswindows: + if _mswindows: + if preexec_fn is not None: + raise ValueError("preexec_fn is not supported on Windows " + "platforms") + else: # These two are Windows-only knobs; on POSIX CPython rejects them # up front rather than silently ignoring (test_invalid_args). if startupinfo is not None: @@ -474,7 +555,9 @@ def __init__(self, args, bufsize=-1, executable=None, stdin=None, if umask is None: umask = -1 - if pass_fds and not close_fds: + # POSIX-only: CPython keeps this warning in its POSIX branch; on + # Windows pass_fds is rejected by _execute_child instead. + if not _mswindows and pass_fds and not close_fds: warnings.warn("pass_fds overriding close_fds.", RuntimeWarning) close_fds = True @@ -483,6 +566,18 @@ def __init__(self, args, bufsize=-1, executable=None, stdin=None, errread, errwrite, to_close) = self._get_handles(stdin, stdout, stderr) + # We wrap OS handles *before* launching the child, otherwise a + # quickly terminating child could make our fds unwrappable + # (see #8458). On Windows the parent-side pipe ends are `Handle`s; + # detach each into a CRT file descriptor the io module can own. + if _mswindows: + if p2cwrite != -1: + p2cwrite = msvcrt.open_osfhandle(p2cwrite.Detach(), 0) + if c2pread != -1: + c2pread = msvcrt.open_osfhandle(c2pread.Detach(), 0) + if errread != -1: + errread = msvcrt.open_osfhandle(errread.Detach(), 0) + try: if p2cwrite != -1: self.stdin = self._wrap_fd(p2cwrite, "w", bufsize) @@ -513,7 +608,10 @@ def __init__(self, args, bufsize=-1, executable=None, stdin=None, if not self._closed_child_pipe_fds: for fd in to_close: try: - os.close(fd) + if _mswindows and isinstance(fd, Handle): + fd.Close() + else: + os.close(fd) except OSError: pass raise @@ -914,7 +1012,10 @@ def wait(self, timeout=None): """Wait for child to terminate; set and return :attr:`returncode`.""" if self.returncode is not None: return self.returncode - if not _HAVE_FORK_EXEC: + # `_subprocess.spawn` fallback dispatch — non-POSIX *and* non-NT + # only. On Windows `self._handle` is a `Handle` and `_wait` below + # (overridden by the `if _mswindows:` block) drives WaitForSingleObject. + if not _mswindows and not _HAVE_FORK_EXEC: res = self._handle["wait"](timeout) if timeout is not None else self._handle["wait"]() self.returncode = res return res @@ -1339,6 +1440,428 @@ def __repr__(self): obj_repr = obj_repr[:76] + "...>" return obj_repr + if _mswindows: + # + # Windows methods (CPython Lib/subprocess.py `_mswindows` arm, + # RFC 0063 WS2). Defined *after* the POSIX/portable definitions so + # that, on nt, they override them; every other platform keeps the + # definitions above untouched. + # + def _get_handles(self, stdin, stdout, stderr): + """Construct and return tuple with IO objects: + p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite, + plus the set of child-side handles the parent must close once + the child is launched (MS Windows version).""" + if stdin is None and stdout is None and stderr is None: + return (-1, -1, -1, -1, -1, -1, set()) + + p2cread, p2cwrite = -1, -1 + c2pread, c2pwrite = -1, -1 + errread, errwrite = -1, -1 + + # The inheritable child-side duplicates. WeavePy's __init__/ + # _execute_child thread a `to_close` set through instead of + # CPython's positional p2cread/c2pwrite/errwrite closes, so the + # Windows arm collects the `_make_inheritable` results here; + # `_close_pipe_fds` (below) closes them after CreateProcess. + to_close = set() + # Handles to destroy if pipe setup itself fails partway — + # CPython's `_on_error_fd_closer` context manager, written out + # inline to avoid a contextlib dependency in this module. + err_close_fds = [] + try: + if stdin is None: + p2cread = _winapi.GetStdHandle(_winapi.STD_INPUT_HANDLE) + if p2cread is None: + p2cread, _ = _winapi.CreatePipe(None, 0) + p2cread = Handle(p2cread) + err_close_fds.append(p2cread) + _winapi.CloseHandle(_) + elif stdin == PIPE: + p2cread, p2cwrite = _winapi.CreatePipe(None, 0) + p2cread, p2cwrite = Handle(p2cread), Handle(p2cwrite) + err_close_fds.extend((p2cread, p2cwrite)) + elif stdin == DEVNULL: + p2cread = msvcrt.get_osfhandle(self._get_devnull()) + elif isinstance(stdin, int): + p2cread = msvcrt.get_osfhandle(stdin) + else: + # Assuming file-like object + p2cread = msvcrt.get_osfhandle(stdin.fileno()) + p2cread = self._make_inheritable(p2cread) + to_close.add(p2cread) + + if stdout is None: + c2pwrite = _winapi.GetStdHandle(_winapi.STD_OUTPUT_HANDLE) + if c2pwrite is None: + _, c2pwrite = _winapi.CreatePipe(None, 0) + c2pwrite = Handle(c2pwrite) + err_close_fds.append(c2pwrite) + _winapi.CloseHandle(_) + elif stdout == PIPE: + c2pread, c2pwrite = _winapi.CreatePipe(None, 0) + c2pread, c2pwrite = Handle(c2pread), Handle(c2pwrite) + err_close_fds.extend((c2pread, c2pwrite)) + elif stdout == DEVNULL: + c2pwrite = msvcrt.get_osfhandle(self._get_devnull()) + elif isinstance(stdout, int): + c2pwrite = msvcrt.get_osfhandle(stdout) + else: + # Assuming file-like object + c2pwrite = msvcrt.get_osfhandle(stdout.fileno()) + c2pwrite = self._make_inheritable(c2pwrite) + to_close.add(c2pwrite) + + if stderr is None: + errwrite = _winapi.GetStdHandle(_winapi.STD_ERROR_HANDLE) + if errwrite is None: + _, errwrite = _winapi.CreatePipe(None, 0) + errwrite = Handle(errwrite) + err_close_fds.append(errwrite) + _winapi.CloseHandle(_) + elif stderr == PIPE: + errread, errwrite = _winapi.CreatePipe(None, 0) + errread, errwrite = Handle(errread), Handle(errwrite) + err_close_fds.extend((errread, errwrite)) + elif stderr == STDOUT: + errwrite = c2pwrite + elif stderr == DEVNULL: + errwrite = msvcrt.get_osfhandle(self._get_devnull()) + elif isinstance(stderr, int): + errwrite = msvcrt.get_osfhandle(stderr) + else: + # Assuming file-like object + errwrite = msvcrt.get_osfhandle(stderr.fileno()) + errwrite = self._make_inheritable(errwrite) + to_close.add(errwrite) + except: + # Also close the inheritable duplicates already made (CPython + # leaves those to Handle.__del__; closing eagerly is safe — + # they are private to us). + err_close_fds.extend(to_close) + if self._devnull is not None: + err_close_fds.append(self._devnull) + self._devnull = None + for fd in err_close_fds: + try: + if isinstance(fd, Handle): + fd.Close() + else: + os.close(fd) + except OSError: + pass + raise + + return (p2cread, p2cwrite, + c2pread, c2pwrite, + errread, errwrite, + to_close) + + def _make_inheritable(self, handle): + """Return a duplicate of handle, which is inheritable""" + h = _winapi.DuplicateHandle( + _winapi.GetCurrentProcess(), handle, + _winapi.GetCurrentProcess(), 0, 1, + _winapi.DUPLICATE_SAME_ACCESS) + return Handle(h) + + def _filter_handle_list(self, handle_list): + """Filter out console handles that can't be used + in lpAttributeList["handle_list"] and make sure the list + isn't empty. This also removes duplicate handles.""" + # An handle with it's lowest two bits set might be a special console + # handle that if passed in lpAttributeList["handle_list"], will + # cause it to fail. + return list({handle for handle in handle_list + if handle & 0x3 != 0x3 + or _winapi.GetFileType(handle) != + _winapi.FILE_TYPE_CHAR}) + + def _execute_child(self, args, executable, preexec_fn, close_fds, + pass_fds, cwd, env, startupinfo, creationflags, + shell, p2cread, p2cwrite, c2pread, c2pwrite, + errread, errwrite, unused_restore_signals, + unused_gid, unused_gids, unused_uid, unused_umask, + unused_start_new_session, unused_process_group, + to_close): + """Execute program (MS Windows version)""" + + assert not pass_fds, "pass_fds not supported on Windows." + + if isinstance(args, str): + pass + elif isinstance(args, bytes): + if shell: + raise TypeError('bytes args is not allowed on Windows') + args = list2cmdline([args]) + elif isinstance(args, os.PathLike): + if shell: + raise TypeError('path-like args is not allowed when ' + 'shell is true') + args = list2cmdline([args]) + else: + args = list2cmdline(args) + + if executable is not None: + executable = os.fsdecode(executable) + + # Process startup details + if startupinfo is None: + startupinfo = STARTUPINFO() + else: + # bpo-34044: Copy STARTUPINFO since it is modified below, + # so the caller can reuse it multiple times. + startupinfo = startupinfo.copy() + + use_std_handles = -1 not in (p2cread, c2pwrite, errwrite) + if use_std_handles: + startupinfo.dwFlags |= _winapi.STARTF_USESTDHANDLES + startupinfo.hStdInput = p2cread + startupinfo.hStdOutput = c2pwrite + startupinfo.hStdError = errwrite + + attribute_list = startupinfo.lpAttributeList + have_handle_list = bool(attribute_list and + "handle_list" in attribute_list and + attribute_list["handle_list"]) + + # If we were given an handle_list or need to create one + if have_handle_list or (use_std_handles and close_fds): + if attribute_list is None: + attribute_list = startupinfo.lpAttributeList = {} + handle_list = attribute_list["handle_list"] = \ + list(attribute_list.get("handle_list", [])) + + if use_std_handles: + handle_list += [int(p2cread), int(c2pwrite), int(errwrite)] + + handle_list[:] = self._filter_handle_list(handle_list) + + if handle_list: + if not close_fds: + warnings.warn("startupinfo.lpAttributeList['handle_list'] " + "overriding close_fds", RuntimeWarning) + + # When using the handle_list we always request to inherit + # handles but the only handles that will be inherited are + # the ones in the handle_list + close_fds = False + + if shell: + startupinfo.dwFlags |= _winapi.STARTF_USESHOWWINDOW + startupinfo.wShowWindow = _winapi.SW_HIDE + if not executable: + # gh-101283: without a fully-qualified path, before Windows + # checks the system directories, it first looks in the + # application directory, and also the current directory if + # NeedCurrentDirectoryForExePathW(ExeName) is true, so try + # to avoid executing unqualified "cmd.exe". + comspec = os.environ.get('ComSpec') + if not comspec: + system_root = os.environ.get('SystemRoot', '') + comspec = os.path.join(system_root, 'System32', 'cmd.exe') + if not os.path.isabs(comspec): + raise FileNotFoundError('shell not found: neither %ComSpec% nor %SystemRoot% is set') + if os.path.isabs(comspec): + executable = comspec + else: + comspec = executable + + args = '{} /c "{}"'.format(comspec, args) + + if cwd is not None: + cwd = os.fsdecode(cwd) + + sys_audit = getattr(sys, "audit", None) + if sys_audit is not None: + try: + sys_audit("subprocess.Popen", executable, args, cwd, env) + except Exception: + pass + + # Start the process. The env dict is handed straight to + # _winapi.CreateProcess, which builds the environment block. + try: + hp, ht, pid, tid = _winapi.CreateProcess(executable, args, + # no special security + None, None, + int(not close_fds), + creationflags, + env, + cwd, + startupinfo) + finally: + # Child is launched. Close the parent's copy of those pipe + # handles that only the child should have open. You need + # to make sure that no handles to the write end of the + # output pipe are maintained in this process or else the + # pipe will not close when the child process exits and the + # ReadFile will hang. + self._close_pipe_fds(to_close, p2cread, p2cwrite, + c2pread, c2pwrite, errread, errwrite) + + # Retain the process handle, but close the thread handle + self._child_created = True + self._handle = Handle(hp) + self.pid = pid + _winapi.CloseHandle(ht) + + def _close_pipe_fds(self, to_close, p2cread, p2cwrite, + c2pread, c2pwrite, errread, errwrite): + # Windows version: the child-side ends are the inheritable + # `Handle` duplicates collected in `to_close` (p2cread, c2pwrite, + # errwrite when != -1); the child now owns its copies. + for handle in to_close: + try: + handle.Close() + except OSError: + pass + devnull_fd = self._devnull + if devnull_fd is not None: + try: + os.close(devnull_fd) + except OSError: + pass + # Prevent a double close of these handles/fds from __init__ + # on error. + self._closed_child_pipe_fds = True + + def _internal_poll(self, _deadstate=None, + _WaitForSingleObject=_winapi.WaitForSingleObject, + _WAIT_OBJECT_0=_winapi.WAIT_OBJECT_0, + _GetExitCodeProcess=_winapi.GetExitCodeProcess): + """Check if child process has terminated. Returns returncode + attribute. + + This method is called by __del__, so it can only refer to objects + in its local scope. + + """ + if self.returncode is None: + if _WaitForSingleObject(self._handle, 0) == _WAIT_OBJECT_0: + self.returncode = _GetExitCodeProcess(self._handle) + return self.returncode + + def _wait(self, timeout): + """Internal implementation of wait() on Windows.""" + if timeout is None: + timeout_millis = _winapi.INFINITE + elif timeout <= 0: + timeout_millis = 0 + else: + timeout_millis = int(timeout * 1000) + if self.returncode is None: + # API note: Returns immediately if timeout_millis == 0. + result = _winapi.WaitForSingleObject(self._handle, + timeout_millis) + if result == _winapi.WAIT_TIMEOUT: + raise TimeoutExpired(self.args, timeout) + self.returncode = _winapi.GetExitCodeProcess(self._handle) + return self.returncode + + def _readerthread(self, fh, buffer): + buffer.append(fh.read()) + fh.close() + + def _writerthread(self, input): + self._stdin_write(input) + + def _communicate(self, input, endtime, orig_timeout): + # Start reader threads feeding into a list hanging off of this + # object, unless they've already been started. + if self.stdout and not hasattr(self, "_stdout_buff"): + self._stdout_buff = [] + self.stdout_thread = \ + _threading.Thread(target=self._readerthread, + args=(self.stdout, self._stdout_buff)) + self.stdout_thread.daemon = True + self.stdout_thread.start() + if self.stderr and not hasattr(self, "_stderr_buff"): + self._stderr_buff = [] + self.stderr_thread = \ + _threading.Thread(target=self._readerthread, + args=(self.stderr, self._stderr_buff)) + self.stderr_thread.daemon = True + self.stderr_thread.start() + + # Start writer thread to send input to stdin, unless already + # started. The thread writes input and closes stdin when done, + # or continues in the background on timeout. + if self.stdin and not hasattr(self, "_stdin_thread"): + self._stdin_thread = \ + _threading.Thread(target=self._writerthread, + args=(input,)) + self._stdin_thread.daemon = True + self._stdin_thread.start() + + # Wait for the writer thread, or time out. If we time out, the + # thread remains writing and the fd left open in case the user + # calls communicate again. + if hasattr(self, "_stdin_thread"): + self._stdin_thread.join(self._remaining_time(endtime)) + if self._stdin_thread.is_alive(): + raise TimeoutExpired(self.args, orig_timeout) + + # Wait for the reader threads, or time out. If we time out, the + # threads remain reading and the fds left open in case the user + # calls communicate again. + if self.stdout is not None: + self.stdout_thread.join(self._remaining_time(endtime)) + if self.stdout_thread.is_alive(): + raise TimeoutExpired(self.args, orig_timeout) + if self.stderr is not None: + self.stderr_thread.join(self._remaining_time(endtime)) + if self.stderr_thread.is_alive(): + raise TimeoutExpired(self.args, orig_timeout) + + # Collect the output from and close both pipes, now that we know + # both have been read successfully. + stdout = None + stderr = None + if self.stdout: + stdout = self._stdout_buff + self.stdout.close() + if self.stderr: + stderr = self._stderr_buff + self.stderr.close() + + # All data exchanged. Translate lists into strings. + stdout = stdout[0] if stdout else None + stderr = stderr[0] if stderr else None + + return (stdout, stderr) + + def send_signal(self, sig): + """Send a signal to the process.""" + # Don't signal a process that we know has already died. + if self.returncode is not None: + return + if sig == signal.SIGTERM: + self.terminate() + elif sig == signal.CTRL_C_EVENT: + os.kill(self.pid, signal.CTRL_C_EVENT) + elif sig == signal.CTRL_BREAK_EVENT: + os.kill(self.pid, signal.CTRL_BREAK_EVENT) + else: + raise ValueError("Unsupported signal: {}".format(sig)) + + def terminate(self): + """Terminates the process.""" + # Don't terminate a process that we know has already died. + if self.returncode is not None: + return + try: + _winapi.TerminateProcess(self._handle, 1) + except PermissionError: + # ERROR_ACCESS_DENIED (winerror 5) is received when the + # process already died. + rc = _winapi.GetExitCodeProcess(self._handle) + if rc == _winapi.STILL_ACTIVE: + raise + self.returncode = rc + + kill = terminate + class _DummyLock: """A no-op lock used when `threading` is unavailable.""" @@ -1376,9 +1899,17 @@ def run(*popenargs, input=None, capture_output=False, timeout=None, with Popen(*popenargs, **kwargs) as process: try: stdout, stderr = process.communicate(input, timeout=timeout) - except TimeoutExpired: + except TimeoutExpired as exc: process.kill() - stdout, stderr = process.communicate() + if _mswindows: + # Windows accumulates the output in a single blocking + # read() call run on child threads, with the timeout + # being done in a join() on those threads. communicate() + # _after_ kill() is required to collect that and add it + # to the exception. + exc.stdout, exc.stderr = process.communicate() + else: + stdout, stderr = process.communicate() raise except: # noqa: E722 - re-raise after cleanup, like CPython. process.kill() @@ -1482,3 +2013,19 @@ def getoutput(cmd, *, encoding=None, errors=None): "getstatusoutput", "CalledProcessError", "TimeoutExpired", "SubprocessError", "CompletedProcess", "PIPE", "DEVNULL", "STDOUT", ] + +if _mswindows: + # CPython extends __all__ with the Windows constant re-exports right + # after importing them; WeavePy defines __all__ at the bottom of the + # module, so the extension lives here instead. + __all__.extend(["CREATE_NEW_CONSOLE", "CREATE_NEW_PROCESS_GROUP", + "STD_INPUT_HANDLE", "STD_OUTPUT_HANDLE", + "STD_ERROR_HANDLE", "SW_HIDE", + "STARTF_USESTDHANDLES", "STARTF_USESHOWWINDOW", + "STARTF_FORCEONFEEDBACK", "STARTF_FORCEOFFFEEDBACK", + "STARTUPINFO", + "ABOVE_NORMAL_PRIORITY_CLASS", "BELOW_NORMAL_PRIORITY_CLASS", + "HIGH_PRIORITY_CLASS", "IDLE_PRIORITY_CLASS", + "NORMAL_PRIORITY_CLASS", "REALTIME_PRIORITY_CLASS", + "CREATE_NO_WINDOW", "DETACHED_PROCESS", + "CREATE_DEFAULT_ERROR_MODE", "CREATE_BREAKAWAY_FROM_JOB"]) diff --git a/crates/weavepy-vm/src/stdlib/python/venv/__init__.py b/crates/weavepy-vm/src/stdlib/python/venv/__init__.py index c45cb2ee..2d4f253f 100644 --- a/crates/weavepy-vm/src/stdlib/python/venv/__init__.py +++ b/crates/weavepy-vm/src/stdlib/python/venv/__init__.py @@ -327,54 +327,20 @@ def setup_python(self, context): exename = os.path.basename(context.env_exe) exe_stem = os.path.splitext(exename)[0] exe_d = '_d' if os.path.normcase(exe_stem).endswith('_d') else '' - if sysconfig.is_python_build(): - scripts = dirname - else: - scripts = os.path.join(os.path.dirname(__file__), - 'scripts', 'nt') - if not sysconfig.get_config_var("Py_GIL_DISABLED"): - python_exe = os.path.join(dirname, f'python{exe_d}.exe') - pythonw_exe = os.path.join(dirname, f'pythonw{exe_d}.exe') - link_sources = { - 'python.exe': python_exe, - f'python{exe_d}.exe': python_exe, - 'pythonw.exe': pythonw_exe, - f'pythonw{exe_d}.exe': pythonw_exe, - } - python_exe = os.path.join(scripts, f'venvlauncher{exe_d}.exe') - pythonw_exe = os.path.join(scripts, f'venvwlauncher{exe_d}.exe') - copy_sources = { - 'python.exe': python_exe, - f'python{exe_d}.exe': python_exe, - 'pythonw.exe': pythonw_exe, - f'pythonw{exe_d}.exe': pythonw_exe, - } - else: - exe_t = f'3.{sys.version_info[1]}t' - python_exe = os.path.join(dirname, f'python{exe_t}{exe_d}.exe') - pythonw_exe = os.path.join(dirname, f'pythonw{exe_t}{exe_d}.exe') - link_sources = { - 'python.exe': python_exe, - f'python{exe_d}.exe': python_exe, - f'python{exe_t}.exe': python_exe, - f'python{exe_t}{exe_d}.exe': python_exe, - 'pythonw.exe': pythonw_exe, - f'pythonw{exe_d}.exe': pythonw_exe, - f'pythonw{exe_t}.exe': pythonw_exe, - f'pythonw{exe_t}{exe_d}.exe': pythonw_exe, - } - python_exe = os.path.join(scripts, f'venvlaunchert{exe_d}.exe') - pythonw_exe = os.path.join(scripts, f'venvwlaunchert{exe_d}.exe') - copy_sources = { - 'python.exe': python_exe, - f'python{exe_d}.exe': python_exe, - f'python{exe_t}.exe': python_exe, - f'python{exe_t}{exe_d}.exe': python_exe, - 'pythonw.exe': pythonw_exe, - f'pythonw{exe_d}.exe': pythonw_exe, - f'pythonw{exe_t}.exe': pythonw_exe, - f'pythonw{exe_t}{exe_d}.exe': pythonw_exe, - } + # WeavePy: CPython points copy_sources at the `venvlauncher.exe` + # assets its own Windows build compiles into venv\scripts\nt; + # WeavePy ships no launcher assets. Like python-build-standalone, + # the venv gets a real copy of the single static interpreter + # executable itself — startup resolves the venv by chasing + # pyvenv.cfg's `home=` key, so no launcher indirection is needed. + base_exe = context.executable + link_sources = { + 'python.exe': base_exe, + f'python{exe_d}.exe': base_exe, + 'pythonw.exe': base_exe, + f'pythonw{exe_d}.exe': base_exe, + } + copy_sources = dict(link_sources) do_copies = True if self.symlinks: diff --git a/crates/weavepy-vm/src/stdlib/python/venv/scripts/nt/.gitattributes b/crates/weavepy-vm/src/stdlib/python/venv/scripts/nt/.gitattributes new file mode 100644 index 00000000..59525cb3 --- /dev/null +++ b/crates/weavepy-vm/src/stdlib/python/venv/scripts/nt/.gitattributes @@ -0,0 +1,4 @@ +# cmd.exe batch files must keep CRLF line endings (CPython ships them +# that way; LF-only .bat files trip cmd.exe parsing edge cases). This +# overrides the repo-root `* text=auto eol=lf` for this directory. +*.bat text eol=crlf diff --git a/crates/weavepy-vm/src/stdlib/python/venv/scripts/nt/activate.bat b/crates/weavepy-vm/src/stdlib/python/venv/scripts/nt/activate.bat new file mode 100644 index 00000000..28af3514 --- /dev/null +++ b/crates/weavepy-vm/src/stdlib/python/venv/scripts/nt/activate.bat @@ -0,0 +1,34 @@ +@echo off + +rem This file is UTF-8 encoded, so we need to update the current code page while executing it +for /f "tokens=2 delims=:." %%a in ('"%SystemRoot%\System32\chcp.com"') do ( + set _OLD_CODEPAGE=%%a +) +if defined _OLD_CODEPAGE ( + "%SystemRoot%\System32\chcp.com" 65001 > nul +) + +set "VIRTUAL_ENV=__VENV_DIR__" + +if not defined PROMPT set PROMPT=$P$G + +if defined _OLD_VIRTUAL_PROMPT set PROMPT=%_OLD_VIRTUAL_PROMPT% +if defined _OLD_VIRTUAL_PYTHONHOME set PYTHONHOME=%_OLD_VIRTUAL_PYTHONHOME% + +if not defined VIRTUAL_ENV_DISABLE_PROMPT set "_OLD_VIRTUAL_PROMPT=%PROMPT%" +if not defined VIRTUAL_ENV_DISABLE_PROMPT set "PROMPT=(__VENV_PROMPT__) %PROMPT%" + +if defined PYTHONHOME set _OLD_VIRTUAL_PYTHONHOME=%PYTHONHOME% +set PYTHONHOME= + +if defined _OLD_VIRTUAL_PATH set PATH=%_OLD_VIRTUAL_PATH% +if not defined _OLD_VIRTUAL_PATH set _OLD_VIRTUAL_PATH=%PATH% + +set "PATH=%VIRTUAL_ENV%\__VENV_BIN_NAME__;%PATH%" +set "VIRTUAL_ENV_PROMPT=__VENV_PROMPT__" + +:END +if defined _OLD_CODEPAGE ( + "%SystemRoot%\System32\chcp.com" %_OLD_CODEPAGE% > nul + set _OLD_CODEPAGE= +) diff --git a/crates/weavepy-vm/src/stdlib/python/venv/scripts/nt/deactivate.bat b/crates/weavepy-vm/src/stdlib/python/venv/scripts/nt/deactivate.bat new file mode 100644 index 00000000..541854b7 --- /dev/null +++ b/crates/weavepy-vm/src/stdlib/python/venv/scripts/nt/deactivate.bat @@ -0,0 +1,22 @@ +@echo off + +if defined _OLD_VIRTUAL_PROMPT ( + set "PROMPT=%_OLD_VIRTUAL_PROMPT%" +) +set _OLD_VIRTUAL_PROMPT= + +if defined _OLD_VIRTUAL_PYTHONHOME ( + set "PYTHONHOME=%_OLD_VIRTUAL_PYTHONHOME%" + set _OLD_VIRTUAL_PYTHONHOME= +) + +if defined _OLD_VIRTUAL_PATH ( + set "PATH=%_OLD_VIRTUAL_PATH%" +) + +set _OLD_VIRTUAL_PATH= + +set VIRTUAL_ENV= +set VIRTUAL_ENV_PROMPT= + +:END diff --git a/crates/weavepy-vm/src/stdlib/select_mod.rs b/crates/weavepy-vm/src/stdlib/select_mod.rs index 485680a8..a95e32df 100644 --- a/crates/weavepy-vm/src/stdlib/select_mod.rs +++ b/crates/weavepy-vm/src/stdlib/select_mod.rs @@ -1,12 +1,14 @@ -//! The `select` built-in module (RFC 0039 WS6). +//! The `select` built-in module (RFC 0039 WS6; Windows arm RFC 0063 WS4). //! //! Faithful, `libc`-backed I/O multiplexing primitives: //! -//! * `select.select(rlist, wlist, xlist, timeout=None)` — over `poll(2)`, -//! returning the *original* objects that are ready (CPython maps the -//! ready descriptors back to the passed-in file objects). +//! * `select.select(rlist, wlist, xlist, timeout=None)` — over `poll(2)` +//! on POSIX and Winsock `select()` on Windows, returning the *original* +//! objects that are ready (CPython maps the ready descriptors back to +//! the passed-in file objects). //! * `select.poll()` — a real `poll(2)` object -//! (`register`/`modify`/`unregister`/`poll`). +//! (`register`/`modify`/`unregister`/`poll`) — POSIX only, so +//! `hasattr(select, 'poll')` stays truthful on NT. //! * `select.kqueue()` / `select.kevent(...)` + the `KQ_*` constants //! on macOS/BSD — over `kqueue(2)`/`kevent(2)`. //! @@ -25,13 +27,15 @@ use crate::sync::Rc; use crate::sync::RefCell; -#[cfg(unix)] +#[cfg(not(windows))] +use crate::error::os_error; +#[cfg(any(unix, windows))] use crate::error::type_error; -use crate::error::{os_error, RuntimeError}; +use crate::error::RuntimeError; use crate::import::ModuleCache; use crate::object::{BuiltinFn, DictData, DictKey, Object, PyModule}; -#[cfg(unix)] +#[cfg(any(unix, windows))] use std::time::{Duration, Instant}; pub fn build(_cache: &ModuleCache) -> Rc { @@ -138,7 +142,7 @@ fn poll_constants() -> Vec<(&'static str, i64)> { /// Run any pending OS-signal handlers on the main thread, propagating a /// handler that raises. No-op (and cheap) when nothing is tripped. -#[cfg(unix)] +#[cfg(any(unix, windows))] fn service_pending_signals() -> Result<(), RuntimeError> { if !crate::stdlib::signal_mod::signals_pending() { return Ok(()); @@ -159,9 +163,23 @@ fn service_pending_signals() -> Result<(), RuntimeError> { /// CPython's pure `EINTR` loop — the main thread waits in short slices /// and re-checks tripped signals between them. Short enough that a /// handler runs promptly; long enough that idle wakeup cost is small. -#[cfg(unix)] +#[cfg(any(unix, windows))] const SIGNAL_POLL_SLICE: Duration = Duration::from_millis(20); +/// Whether a multiplexer failure is the interrupted-syscall case the +/// retry loop must absorb (PEP 475). POSIX reports `EINTR`; Winsock's +/// equivalent is `WSAEINTR` (only reachable via the obsolete +/// `WSACancelBlockingCall`, but CPython's `select` still loops on it). +#[cfg(unix)] +fn is_eintr(e: &std::io::Error) -> bool { + e.raw_os_error() == Some(libc::EINTR) +} + +#[cfg(windows)] +fn is_eintr(e: &std::io::Error) -> bool { + e.raw_os_error() == Some(windows_sys::Win32::Networking::WinSock::WSAEINTR) +} + /// Drive a blocking multiplexing syscall to readiness with the GIL /// released. `poll_once(slice)` performs exactly one syscall waiting up /// to `slice` (`None` = block forever) and returns the number of ready @@ -175,7 +193,7 @@ const SIGNAL_POLL_SLICE: Duration = Duration::from_millis(20); /// main thread (no Python signal handlers run there) we block for the /// whole remaining time in one call. A zero `timeout` still performs one /// non-blocking syscall. -#[cfg(unix)] +#[cfg(any(unix, windows))] fn blocking_retry( timeout: Option, mut poll_once: impl FnMut(Option) -> std::io::Result, @@ -206,7 +224,7 @@ fn blocking_retry( return Ok(0); } } - Err(e) if e.raw_os_error() == Some(libc::EINTR) => { + Err(e) if is_eintr(&e) => { if on_main { service_pending_signals()?; } @@ -214,6 +232,18 @@ fn blocking_retry( return Ok(0); } } + // On Windows the raw code is a `WSAGetLastError()` value: route + // it through the WS1 error bridge so `.winerror`/`.errno`/ + // `.strerror` carry the CPython shape (the Winsock 10000-range + // passes through `winerror_to_errno` untranslated). + #[cfg(windows)] + Err(e) => { + return Err(crate::stdlib::nt_support::win32_error_to_py( + e.raw_os_error().unwrap_or(0), + None, + )) + } + #[cfg(not(windows))] Err(e) => return Err(crate::error::io_error_to_py(&e)), } } @@ -242,8 +272,10 @@ fn timeout_to_poll_ms(remaining: Option) -> libc::c_int { // --------------------------------------------------------------------------- /// Resolve a file descriptor from an int (or bool), or — for any other -/// object — its `fileno()` method (CPython's `PyObject_AsFileDescriptor`). -#[cfg(unix)] +/// object — its `fileno()` method (CPython's `PyObject_AsFileDescriptor`, +/// which returns a C `int` on Windows too — a `SOCKET` is a kernel handle +/// and kernel handle values fit in 32 bits). +#[cfg(any(unix, windows))] fn fd_of(obj: &Object) -> Result { match obj { Object::Int(n) => Ok(*n as i32), @@ -269,7 +301,7 @@ fn fd_of(obj: &Object) -> Result { /// are walked by *index*, re-reading length and releasing the borrow /// around each `fileno()` call, so a `fileno()` that mutates the list /// is observed exactly like CPython (`test_select.test_select_mutated`). -#[cfg(unix)] +#[cfg(any(unix, windows))] fn collect_fd_objects(arg: Option<&Object>) -> Result, RuntimeError> { match arg { None | Some(Object::None) => Ok(Vec::new()), @@ -304,7 +336,7 @@ fn collect_fd_objects(arg: Option<&Object>) -> Result, Runtim /// `select.select` timeout is in *seconds* (float/int) or `None`. /// CPython rejects negative timeouts with `ValueError`. -#[cfg(unix)] +#[cfg(any(unix, windows))] fn parse_secs(arg: Option<&Object>) -> Result, RuntimeError> { match arg { None | Some(Object::None) => Ok(None), @@ -407,7 +439,163 @@ fn select_select(args: &[Object]) -> Result { ])) } -#[cfg(not(unix))] +/// Winsock `select()` arm (RFC 0063 WS4), mirroring CPython's +/// `selectmodule.c` on Windows: only SOCKETs are accepted — there is no +/// up-front validity check possible (no `fcntl`), so a non-socket value +/// surfaces as the kernel's `WSAENOTSOCK` from `select()` itself. +#[cfg(windows)] +fn select_select(args: &[Object]) -> Result { + use windows_sys::Win32::Networking::WinSock as ws; + + // CPython redefines FD_SETSIZE to 512 *before* including + // (selectmodule.c: `#define FD_SETSIZE 512`), growing fd_set's embedded + // array — on Winsock, fd_set is a count + array of SOCKETs, and the + // first argument of select() is ignored, so a bigger array Just Works. + // windows-sys bakes the default 64-slot layout into its FD_SET struct, + // so we replicate the trick: a layout-identical repr(C) struct with a + // 512-slot array, passed to select() as *mut FD_SET. + const PY_FD_SETSIZE: usize = 512; + #[repr(C)] + struct FdSet { + fd_count: u32, + fd_array: [ws::SOCKET; PY_FD_SETSIZE], + } + impl FdSet { + fn new() -> Self { + FdSet { + fd_count: 0, + fd_array: [0; PY_FD_SETSIZE], + } + } + /// Winsock's FD_SET macro semantics: skip a SOCKET already in the + /// set. Capacity was validated against the *list* lengths up + /// front (like CPython's seq2set), so this never overflows. + fn add(&mut self, s: ws::SOCKET) { + let n = self.fd_count as usize; + if !self.fd_array[..n].contains(&s) { + self.fd_array[n] = s; + self.fd_count += 1; + } + } + fn contains(&self, s: ws::SOCKET) -> bool { + self.fd_array[..self.fd_count as usize].contains(&s) + } + /// CPython passes NULL for an empty set (`imax ? &ifdset : NULL`). + fn as_arg(&mut self) -> *mut ws::FD_SET { + if self.fd_count == 0 { + std::ptr::null_mut() + } else { + std::ptr::from_mut(self).cast() + } + } + } + + let rlist = collect_fd_objects(args.first())?; + let wlist = collect_fd_objects(args.get(1))?; + let xlist = collect_fd_objects(args.get(2))?; + let timeout = parse_secs(args.get(3))?; + + // CPython's seq2set bounds each *list* (pre-dedup) at FD_SETSIZE. + for list in [&rlist, &wlist, &xlist] { + if list.len() > PY_FD_SETSIZE { + return Err(crate::error::value_error( + "too many file descriptors in select()", + )); + } + } + + if rlist.is_empty() && wlist.is_empty() && xlist.is_empty() { + // Winsock select() rejects three empty sets with WSAEINVAL, so + // CPython substitutes a plain Sleep(timeout) — and with a NULL + // timeout returns immediately with n = 0 (select_select_impl's + // `#ifdef MS_WINDOWS` arm). The sleep goes through blocking_retry + // so the main thread stays signal-responsive. + if let Some(t) = timeout { + blocking_retry(Some(t), |slice| { + if let Some(s) = slice { + std::thread::sleep(s); + } + Ok(0) + })?; + } + return Ok(Object::new_tuple(vec![ + Object::new_list(Vec::new()), + Object::new_list(Vec::new()), + Object::new_list(Vec::new()), + ])); + } + + // Sign-extending a bogus negative "fd" is fine: it can't name a real + // SOCKET, so select() reports it as WSAENOTSOCK, exactly like CPython. + let socks = |list: &[(i32, Object)]| -> Vec { + list.iter().map(|(fd, _)| *fd as ws::SOCKET).collect() + }; + let (rfds, wfds, xfds) = (socks(&rlist), socks(&wlist), socks(&xlist)); + + let mut rset = FdSet::new(); + let mut wset = FdSet::new(); + let mut xset = FdSet::new(); + + blocking_retry(timeout, |slice| { + // select() consumes the sets in place; rebuild them per attempt. + rset = FdSet::new(); + wset = FdSet::new(); + xset = FdSet::new(); + for &s in &rfds { + rset.add(s); + } + for &s in &wfds { + wset.add(s); + } + for &s in &xfds { + xset.add(s); + } + let tv = slice.map(dur_to_timeval); + let tvp = tv.as_ref().map_or(std::ptr::null(), std::ptr::from_ref); + // SAFETY: the sets are layout-identical to fd_set (see FdSet), the + // pointers outlive the call, and nfds is ignored on Windows. + let n = unsafe { ws::select(0, rset.as_arg(), wset.as_arg(), xset.as_arg(), tvp) }; + if n == ws::SOCKET_ERROR { + Err(std::io::Error::from_raw_os_error(unsafe { + ws::WSAGetLastError() + })) + } else { + Ok(n as usize) + } + })?; + + // Map ready SOCKETs back to the *original* objects, preserving input + // order (CPython's set2list). On an overall timeout select() left the + // sets empty, so all three sublists come back empty. + let ready = |list: &[(i32, Object)], set: &FdSet| -> Vec { + list.iter() + .filter(|(fd, _)| set.contains(*fd as ws::SOCKET)) + .map(|(_, o)| o.clone()) + .collect() + }; + Ok(Object::new_tuple(vec![ + Object::new_list(ready(&rlist, &rset)), + Object::new_list(ready(&wlist, &wset)), + Object::new_list(ready(&xlist, &xset)), + ])) +} + +/// Convert a wait slice to a Winsock `TIMEVAL`, rounding up so we wait +/// *at least* the requested span (mirrors `timeout_to_poll_ms`). +#[cfg(windows)] +fn dur_to_timeval(d: Duration) -> windows_sys::Win32::Networking::WinSock::TIMEVAL { + let mut us = d.as_micros(); + if u128::from(d.subsec_nanos()) % 1_000 != 0 { + us += 1; + } + let us = us.min(i32::MAX as u128 * 1_000_000); + windows_sys::Win32::Networking::WinSock::TIMEVAL { + tv_sec: (us / 1_000_000) as i32, + tv_usec: (us % 1_000_000) as i32, + } +} + +#[cfg(not(any(unix, windows)))] fn select_select(_args: &[Object]) -> Result { Err(os_error("select.select is unavailable on this platform")) } diff --git a/crates/weavepy-vm/src/stdlib/signal_mod.rs b/crates/weavepy-vm/src/stdlib/signal_mod.rs index ee8486f8..f1c50ae0 100644 --- a/crates/weavepy-vm/src/stdlib/signal_mod.rs +++ b/crates/weavepy-vm/src/stdlib/signal_mod.rs @@ -118,6 +118,12 @@ pub fn deliver_to_vm_main(_sig: i32) -> Option { /// callable (`default_int_handler`), matching CPython. const SIGINT: i32 = 2; +/// SIGBREAK — the Windows-only Ctrl-Break signal (the CRT's value 21; +/// CPython exposes it in `Modules/signalmodule.c`'s `#ifdef SIGBREAK` +/// arm). `CTRL_BREAK_EVENT` console events map onto it. +#[cfg(windows)] +const SIGBREAK: i32 = 21; + /// Slots in the tripped-signal flag array. Sized one past the largest /// signal number we accept, so `signum` indexes directly. const TRIP_SLOTS: usize = 65; @@ -369,19 +375,157 @@ pub fn install_startup_dispositions() { } } -/// No-op on non-Unix targets (Windows uses a different signal model). -#[cfg(not(unix))] +/// The Windows twin of the unix `handler_trampoline` body: trip the +/// per-signal atomic (+ the hot gate) and poke the wakeup fd. Called +/// from the `SetConsoleCtrlHandler` trampoline (which Windows runs on a +/// freshly injected OS thread) and from the CRT `signal()` trampoline, +/// so it confines itself to exactly the state the unix async-signal +/// handler touches. The one divergence is deliberate: CPython's +/// `trip_signal` writes the wakeup byte with Winsock `send()` on +/// Windows because `signal.set_wakeup_fd` there only accepts a SOCKET +/// (Modules/signalmodule.c `#ifdef MS_WINDOWS`). +#[cfg(windows)] +fn trip_signal_win(signum: i32) { + if signum >= 1 && (signum as usize) < TRIP_SLOTS { + TRIPPED[signum as usize].store(true, Ordering::Release); + ANY_TRIPPED.store(true, Ordering::Release); + crate::hot_gates::set(crate::hot_gates::SIGNALS); + } + let fd = WAKEUP_FD.load(Ordering::Relaxed); + if fd >= 0 { + use windows_sys::Win32::Networking::WinSock::{send, WSAGetLastError, WSAEWOULDBLOCK}; + let byte = [signum as u8]; + let rc = unsafe { send(fd as usize, byte.as_ptr(), 1, 0) }; + if rc < 0 { + // Same reporting contract as the unix trampoline: record the + // first failure (a WSAE* code, which doubles as an errno value + // on Windows) unless it's a full non-blocking buffer the user + // opted out of hearing about. + let err = unsafe { WSAGetLastError() }; + let is_full = err == WSAEWOULDBLOCK; + if WAKEUP_WARN_ON_FULL.load(Ordering::Relaxed) || !is_full { + let _ = WAKEUP_WRITE_ERRNO.compare_exchange( + 0, + err, + Ordering::AcqRel, + Ordering::Relaxed, + ); + } + } + } +} + +/// Console-control trampoline (RFC 0063 WS1). CPython's Windows arm in +/// `Modules/signalmodule.c` reaches SIGINT/SIGBREAK through the CRT's +/// own console handler; WeavePy registers its own +/// `SetConsoleCtrlHandler` routine so `CTRL_C_EVENT`/`CTRL_BREAK_EVENT` +/// delivery doesn't depend on CRT handler ordering (the reliability +/// `_winapi`/`subprocess` consumers expect). Windows runs this on a new +/// OS thread, so only the trip atomics + wakeup send are touched (plus +/// one short handler-table lock — a real Mutex is fine here, unlike in +/// a POSIX async-signal context). Returning TRUE consumes the event so +/// the process survives; a `SIG_DFL` disposition returns FALSE so the +/// OS default action (termination) still runs, matching CPython where a +/// defaulted SIGINT/SIGBREAK kills the process. +#[cfg(windows)] +unsafe extern "system" fn console_ctrl_trampoline(ctrl_type: u32) -> i32 { + use windows_sys::Win32::System::Console::{CTRL_BREAK_EVENT, CTRL_C_EVENT}; + let sig = match ctrl_type { + CTRL_C_EVENT => SIGINT, + CTRL_BREAK_EVENT => SIGBREAK, + // Other events (CLOSE/LOGOFF/SHUTDOWN) take the system default. + _ => return 0, + }; + if matches!(handler_for(sig), Object::Int(0)) { + return 0; + } + trip_signal_win(sig); + 1 +} + +/// The UCRT's `signal()` — the C-level disposition mechanism on +/// Windows, declared locally (this module is its only consumer). +/// Handlers travel as `usize`: the `SIG_DFL`(0)/`SIG_IGN`(1) sentinels +/// or a function pointer; `SIG_ERR` is `usize::MAX`. +#[cfg(windows)] +mod crt_signal { + pub(super) const SIG_DFL: usize = 0; + pub(super) const SIG_IGN: usize = 1; + unsafe extern "C" { + pub(super) fn signal(sig: i32, handler: usize) -> usize; + } +} + +/// CRT-level handler trampoline. The UCRT resets the disposition to +/// `SIG_DFL` before invoking the handler (SysV semantics), so re-arm +/// first — CPython's `signal_handler` does the same under `MS_WINDOWS` +/// (Modules/signalmodule.c) — then trip the shared atomics. +#[cfg(windows)] +extern "C" fn crt_signal_trampoline(signum: i32) { + unsafe { + crt_signal::signal(signum, crt_signal_trampoline as *const () as usize); + } + trip_signal_win(signum); +} + +/// Windows startup dispositions (RFC 0063 WS1). Two cooperating layers, +/// documented because CPython's arrangement is easy to misread: the CRT +/// `signal()` chain is the *disposition* mechanism (it is what CPython's +/// `PyOS_setsig` compiles down to on Windows, and it is the only thing +/// that covers synchronous `raise()` deliveries), while our +/// `SetConsoleCtrlHandler` trampoline owns Ctrl-C/Ctrl-Break *console* +/// events directly. Both funnel into the same tripped-flag atomics the +/// dispatch loop drains, so a console SIGINT and a `raise(SIGINT)` are +/// indistinguishable downstream — exactly the observable behaviour of +/// CPython's `Modules/signalmodule.c` Windows arm. +#[cfg(windows)] +pub fn install_startup_dispositions() { + // Seed the handler table (SIGINT -> default_int_handler) so a + // console Ctrl-C raises KeyboardInterrupt even in a script that + // never imports `signal`. + let _ = handlers(); + static CONSOLE_HANDLER: std::sync::Once = std::sync::Once::new(); + CONSOLE_HANDLER.call_once(|| unsafe { + windows_sys::Win32::System::Console::SetConsoleCtrlHandler( + Some(console_ctrl_trampoline), + 1, + ); + }); + // Arm the CRT chain for SIGINT so `raise(SIGINT)` / CRT-internal + // dispatch reaches the same atomics. + set_os_disposition(SIGINT, OsDisposition::Trip); +} + +/// Install the C-level disposition for `signum` via the UCRT's +/// `signal()`. `SIG_ERR` (an out-of-set signum) is ignored here: +/// callers validate against the Windows signal set first, matching +/// CPython's ValueError-before-CRT ordering in `signal_signal_impl`. +#[cfg(windows)] +fn set_os_disposition(signum: i32, disp: OsDisposition) { + let handler = match disp { + OsDisposition::Default => crt_signal::SIG_DFL, + OsDisposition::Ignore => crt_signal::SIG_IGN, + OsDisposition::Trip => crt_signal_trampoline as *const () as usize, + }; + unsafe { + crt_signal::signal(signum, handler); + } +} + +/// No-op on targets with neither the POSIX nor the NT signal model. +#[cfg(not(any(unix, windows)))] pub fn install_startup_dispositions() {} -/// No-op on non-Unix targets (Windows uses a different signal model). +/// No-op on non-Unix targets (Windows console events arrive on their +/// own injected thread; there is no process signal mask to manage). #[cfg(not(unix))] pub fn block_async_signals_current_thread() {} -/// No-op on non-Unix targets (Windows uses a different signal model). +/// No-op on non-Unix targets (see [`block_async_signals_current_thread`]). #[cfg(not(unix))] pub fn unblock_async_signals_current_thread() {} -#[cfg(not(unix))] +#[cfg(not(any(unix, windows)))] fn set_os_disposition(_signum: i32, _disp: OsDisposition) {} /// Process-global handler table. CPython installs `default_int_handler` @@ -674,6 +818,13 @@ fn signal_signal(args: &[Object]) -> Result { &std::io::Error::from_raw_os_error(libc::EINVAL), )); } + // CPython's Windows arm (`signal_signal_impl`) rejects any signal + // outside the C90+SIGBREAK set with ValueError *before* touching + // the CRT — whose `signal()` would otherwise return SIG_ERR. + #[cfg(windows)] + if !posix_signals().iter().any(|&(_, v)| v == sig) { + return Err(value_error("invalid signal value")); + } set_os_disposition(sig, disp); Ok(set_handler(sig, handler)) } @@ -904,7 +1055,21 @@ fn raise_signal(args: &[Object]) -> Result { libc::raise(sig as libc::c_int); } } - #[cfg(not(unix))] + #[cfg(windows)] + { + // CPython's `signal_raise_signal_impl` calls C `raise()` on + // Windows too: the CRT runs the installed C-level handler chain + // (our `crt_signal_trampoline` trips the shared atomics) and a + // SIG_DFL disposition performs the default action, exactly like + // the unix arm above. The tripped flag is then drained by the + // dispatch loop / blocking-call re-entry paths — the same + // deliver-pending route the unix arm relies on. + let rc = unsafe { crate::stdlib::nt_support::crt::raise(sig) }; + if rc != 0 { + return Err(crate::stdlib::nt_support::last_crt_error_to_py(None)); + } + } + #[cfg(not(any(unix, windows)))] { trip_signal(sig); } @@ -985,7 +1150,11 @@ fn set_wakeup_fd(args: &[Object], kwargs: &[(String, Object)]) -> Result RuntimeError { - os_error_with_errno(libc::EBADF, "Bad file descriptor") + os_error_with_errno(crate::py_errno::EBADF, "Bad file descriptor") } use crate::import::ModuleCache; use crate::object::{BuiltinFn, DictData, DictKey, Object, PyModule}; @@ -239,6 +242,12 @@ pub(crate) fn raw_fd_for_handle(handle: i64) -> Option { // ---- module entry ---- pub fn build(_cache: &ModuleCache) -> Rc { + // CPython performs WSAStartup once when `_socket` is imported + // (PyInit__socket, socketmodule.c) — not lazily on first use — so any + // Winsock call made right after import (getaddrinfo, select on a + // pre-existing SOCKET, …) finds the stack initialized. Mirror that. + #[cfg(windows)] + winsock::ensure_started(); let dict = Rc::new(RefCell::new(DictData::default())); { let mut d = dict.borrow_mut(); @@ -431,6 +440,8 @@ pub fn build(_cache: &ModuleCache) -> Rc { Object::Int(i64::from(val)), ); } + // On non-unix these are the ws2tcpip.h values — they are passed + // straight into Winsock's `getaddrinfo` hints. #[cfg(not(unix))] { d.insert(DictKey(Object::from_static("AI_PASSIVE")), Object::Int(1)); @@ -447,19 +458,39 @@ pub fn build(_cache: &ModuleCache) -> Rc { DictKey(Object::from_static("AI_ADDRCONFIG")), Object::Int(0x0400), ); + d.insert(DictKey(Object::from_static("AI_ALL")), Object::Int(0x0100)); + d.insert( + DictKey(Object::from_static("AI_V4MAPPED")), + Object::Int(0x0800), + ); } - // getnameinfo flags. - d.insert( - DictKey(Object::from_static("NI_NUMERICHOST")), - Object::Int(1), - ); - d.insert( - DictKey(Object::from_static("NI_NUMERICSERV")), - Object::Int(2), - ); - d.insert(DictKey(Object::from_static("NI_NAMEREQD")), Object::Int(4)); - d.insert(DictKey(Object::from_static("NI_DGRAM")), Object::Int(16)); + // getnameinfo flags — like AI_*, these reach the resolver verbatim, + // so publish the platform's own numbering (ws2tcpip.h on Windows, + // where NI_NUMERICHOST is 2 and NI_NUMERICSERV is 8). + #[cfg(windows)] + for (name, val) in [ + ("NI_NOFQDN", 0x01), + ("NI_NUMERICHOST", 0x02), + ("NI_NAMEREQD", 0x04), + ("NI_NUMERICSERV", 0x08), + ("NI_DGRAM", 0x10), + ] { + d.insert(DictKey(Object::from_static(name)), Object::Int(val)); + } + #[cfg(not(windows))] + { + d.insert( + DictKey(Object::from_static("NI_NUMERICHOST")), + Object::Int(1), + ); + d.insert( + DictKey(Object::from_static("NI_NUMERICSERV")), + Object::Int(2), + ); + d.insert(DictKey(Object::from_static("NI_NAMEREQD")), Object::Int(4)); + d.insert(DictKey(Object::from_static("NI_DGRAM")), Object::Int(16)); + } // Sentinels. d.insert(DictKey(Object::from_static("INADDR_ANY")), Object::Int(0)); @@ -501,7 +532,7 @@ pub fn build(_cache: &ModuleCache) -> Rc { // Module-level functions. for (name, body) in module_functions() { - d.insert(DictKey(Object::from_static(name)), b(name, *body)); + d.insert(DictKey(Object::from_static(name)), b(name, body)); } // `getaddrinfo(host, port, family=0, type=0, proto=0, flags=0)` is // routinely called with keyword arguments (e.g. CPython's bundled @@ -548,9 +579,10 @@ fn gaierror_class() -> Rc { /// Build a raised `socket.gaierror(code, msg)` the way CPython's /// `set_gaierror` does: `args = (code, msg)` with `errno`/`strerror` -/// populated so `str(e)` renders `[Errno code] msg`. Only the unix -/// `getaddrinfo` path raises it. -#[cfg(unix)] +/// populated so `str(e)` renders `[Errno code] msg`. The message source +/// is `gai_strerror` on POSIX and `FormatMessageW` on Windows (where +/// ws2tcpip.h's gai_strerror is itself a FormatMessage wrapper). +#[cfg(any(unix, windows))] fn gaierror(code: i32, msg: String) -> crate::error::RuntimeError { let exc = crate::builtin_types::make_exception_with_class(gaierror_class(), &msg); if let Object::Instance(inst) = &exc { @@ -619,7 +651,8 @@ fn socket_methods() -> Vec<(&'static str, Object)> { ) }; } - vec![ + #[cfg_attr(not(unix), allow(unused_mut))] + let mut methods = vec![ // `__init__` is kwargs-aware: `socket(family=..., type=..., proto=..., // fileno=...)` is idiomatic CPython (e.g. asyncio's `_connect_sock`). ( @@ -646,8 +679,6 @@ fn socket_methods() -> Vec<(&'static str, Object)> { m!("recv_into", sock_recv_into), m!("recvfrom", sock_recvfrom), m!("recvfrom_into", sock_recvfrom_into), - m!("sendmsg", sock_sendmsg), - m!("recvmsg", sock_recvmsg), m!("setblocking", sock_setblocking), m!("getblocking", sock_getblocking), m!("settimeout", sock_settimeout), @@ -667,7 +698,14 @@ fn socket_methods() -> Vec<(&'static str, Object)> { m!("family_get", sock_family_attr), m!("type_get", sock_type_attr), m!("proto_get", sock_proto_attr), - ] + ]; + // `sendmsg`/`recvmsg` exist only where CMSG ancillary data does: + // CPython compiles them under `#ifdef CMSG_LEN` (socketmodule.c), so on + // Windows the names are simply *absent* — `hasattr` gates like + // `multiprocessing.reduction.HAVE_SEND_HANDLE` rely on that signal. + #[cfg(unix)] + methods.extend([m!("sendmsg", sock_sendmsg), m!("recvmsg", sock_recvmsg)]); + methods } fn extract_self(args: &[Object]) -> Result, RuntimeError> { @@ -805,6 +843,55 @@ fn run_pending_signals_after_eintr() -> Result<(), RuntimeError> { Ok(()) } +/// Bounded readiness wait on one SOCKET via Winsock `select()` — the +/// Windows twin of the `libc::poll` loop in `sock_accept` (CPython's +/// `internal_select`, socketmodule.c). GIL released for the wait; `0` +/// ready descriptors at the deadline surfaces as `socket.timeout`, +/// a `SOCKET_ERROR` as the WSA-code `OSError` via the WS1 error bridge. +#[cfg(windows)] +fn wait_readable_win( + sock: windows_sys::Win32::Networking::WinSock::SOCKET, + timeout: Duration, +) -> Result<(), RuntimeError> { + use windows_sys::Win32::Networking::WinSock as ws; + let mut fds = ws::FD_SET { + fd_count: 1, + fd_array: [0; 64], + }; + fds.fd_array[0] = sock; + // Round the timeout *up* so we wait at least the requested span. + let mut us = timeout.as_micros(); + if u128::from(timeout.subsec_nanos()) % 1_000 != 0 { + us += 1; + } + let us = us.min(i32::MAX as u128 * 1_000_000); + let tv = ws::TIMEVAL { + tv_sec: (us / 1_000_000) as i32, + tv_usec: (us % 1_000_000) as i32, + }; + let n = crate::gil::allow_threads_then(|| { + // SAFETY: `fds` and `tv` outlive the call; nfds is ignored on + // Windows; NULL write/except sets are allowed. + unsafe { + ws::select( + 0, + &raw mut fds, + std::ptr::null_mut(), + std::ptr::null_mut(), + &raw const tv, + ) + } + }); + match n { + 0 => Err(timeout_error("timed out")), + ws::SOCKET_ERROR => Err(crate::stdlib::nt_support::win32_error_to_py( + unsafe { ws::WSAGetLastError() }, + None, + )), + _ => Ok(()), + } +} + /// Drive a blocking *single-syscall* socket op, retrying on `EINTR` after /// running pending Python signal handlers (PEP 475 — "Retry system calls /// failing with EINTR"). A signal that interrupts a blocking `accept`/`recv`/ @@ -825,6 +912,9 @@ fn blocking_socket_io( state: &Rc>, mut f: impl FnMut(&Socket) -> std::io::Result, ) -> Result { + // The only retry arm is the unix EINTR case (Winsock waits are already + // signal-aware), so on Windows every pass through the body returns. + #[cfg_attr(windows, allow(clippy::never_loop))] loop { match socket_call_once(state, &mut f)? { Ok(v) => return Ok(v), @@ -1137,6 +1227,23 @@ fn sock_accept(args: &[Object]) -> Result { } } } + // Winsock twin of the readiness wait above: `select()` on the single + // listening SOCKET (CPython's `internal_select`, socketmodule.c, which + // uses select on Windows where there is no poll). + #[cfg(windows)] + { + let timeout = state.borrow().timeout; + if let Some(t) = timeout { + if !t.is_zero() { + let sock = { + let b = state.borrow(); + let s = b.inner.as_ref().ok_or_else(closed_socket_error)?; + raw_fd_of(s).ok_or_else(|| os_error("socket has no file descriptor"))? + }; + wait_readable_win(sock as windows_sys::Win32::Networking::WinSock::SOCKET, t)?; + } + } + } // Use `accept_raw` (a bare `accept(2)`) rather than socket2's `accept`, // which on Apple platforms *also* runs `setsockopt(SO_NOSIGPIPE)` on the // freshly accepted fd. When the peer connected and then *closed* (and its @@ -1612,16 +1719,6 @@ fn sock_recvmsg(args: &[Object]) -> Result { ])) } -#[cfg(not(unix))] -fn sock_sendmsg(_args: &[Object]) -> Result { - Err(os_error("sendmsg is not supported on this platform")) -} - -#[cfg(not(unix))] -fn sock_recvmsg(_args: &[Object]) -> Result { - Err(os_error("recvmsg is not supported on this platform")) -} - /// Snapshot the raw fd of `state`, dropping the borrow before the syscall /// (a peer thread may legitimately `close()` it; we then see `EBADF`). #[cfg(unix)] @@ -2108,16 +2205,62 @@ fn sock_set_inheritable(args: &[Object]) -> Result { Ok(Object::None) } -/// Non-POSIX stub: there is no `FD_CLOEXEC` (Windows uses -/// `HANDLE_FLAG_INHERIT`, which the libc crate does not expose). CPython +/// PEP 446 inheritability on Windows: a SOCKET is a kernel HANDLE, so the +/// inheritable bit is `HANDLE_FLAG_INHERIT` read/written through +/// `GetHandleInformation`/`SetHandleInformation` — exactly CPython's +/// `sock_get_inheritable`/`sock_set_inheritable` (socketmodule.c). +#[cfg(windows)] +fn sock_get_inheritable(args: &[Object]) -> Result { + use windows_sys::Win32::Foundation::{GetHandleInformation, HANDLE_FLAG_INHERIT}; + let state = state_of(args)?; + let handle = { + let b = state.borrow(); + let sock = b.inner.as_ref().ok_or_else(closed_socket_error)?; + raw_fd_of(sock).ok_or_else(closed_socket_error)? + }; + let mut flags = 0u32; + let ok = + unsafe { GetHandleInformation(handle as usize as *mut std::ffi::c_void, &raw mut flags) }; + if ok == 0 { + return Err(crate::stdlib::nt_support::last_win32_error_to_py(None)); + } + Ok(Object::Bool(flags & HANDLE_FLAG_INHERIT != 0)) +} + +#[cfg(windows)] +fn sock_set_inheritable(args: &[Object]) -> Result { + use windows_sys::Win32::Foundation::{SetHandleInformation, HANDLE_FLAG_INHERIT}; + let state = state_of(args)?; + let inheritable = args + .get(1) + .is_some_and(super::super::object::Object::is_truthy); + let handle = { + let b = state.borrow(); + let sock = b.inner.as_ref().ok_or_else(closed_socket_error)?; + raw_fd_of(sock).ok_or_else(closed_socket_error)? + }; + let ok = unsafe { + SetHandleInformation( + handle as usize as *mut std::ffi::c_void, + HANDLE_FLAG_INHERIT, + if inheritable { HANDLE_FLAG_INHERIT } else { 0 }, + ) + }; + if ok == 0 { + return Err(crate::stdlib::nt_support::last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +/// Stub for targets with neither `FD_CLOEXEC` nor Win32 handles. CPython /// creates sockets non-inheritable by default, so report that. -#[cfg(not(unix))] +#[cfg(not(any(unix, windows)))] fn sock_get_inheritable(args: &[Object]) -> Result { let _ = state_of(args)?; Ok(Object::Bool(false)) } -#[cfg(not(unix))] +#[cfg(not(any(unix, windows)))] fn sock_set_inheritable(args: &[Object]) -> Result { let _ = state_of(args)?; Ok(Object::None) @@ -2162,11 +2305,56 @@ fn sock_detach(args: &[Object]) -> Result { Ok(Object::Int(fd)) } -/// `socket.dup()` — duplicate the underlying fd (real `dup(2)`) and wrap -/// it in a fresh `socket` object that shares the family/type/proto. The -/// duplicate is an independent fd: closing one leaves the other usable, -/// matching CPython's `socket.dup()`. +/// Duplicate a raw socket descriptor. POSIX: a real `dup(2)`. Windows: +/// CPython's `dup_socket` (socketmodule.c) — a SOCKET is *not* a CRT fd, +/// so the duplicate goes through `WSADuplicateSocketW` into a +/// `WSAPROTOCOL_INFOW` consumed by `WSASocketW(FROM_PROTOCOL_INFO, …)`, +/// created non-inheritable (`WSA_FLAG_NO_HANDLE_INHERIT`, PEP 446). #[cfg(unix)] +fn dup_raw_fd(fd: i64) -> Result { + let dup = unsafe { libc::dup(fd as i32) }; + if dup < 0 { + return Err(io_error_to_py(&std::io::Error::last_os_error())); + } + Ok(i64::from(dup)) +} + +#[cfg(windows)] +fn dup_raw_fd(fd: i64) -> Result { + use windows_sys::Win32::Networking::WinSock as ws; + let mut info: ws::WSAPROTOCOL_INFOW = unsafe { std::mem::zeroed() }; + let pid = unsafe { windows_sys::Win32::System::Threading::GetCurrentProcessId() }; + let rc = unsafe { ws::WSADuplicateSocketW(fd as ws::SOCKET, pid, &raw mut info) }; + if rc != 0 { + return Err(crate::stdlib::nt_support::win32_error_to_py( + unsafe { ws::WSAGetLastError() }, + None, + )); + } + let dup = unsafe { + ws::WSASocketW( + ws::FROM_PROTOCOL_INFO, + ws::FROM_PROTOCOL_INFO, + ws::FROM_PROTOCOL_INFO, + &raw const info, + 0, + ws::WSA_FLAG_NO_HANDLE_INHERIT, + ) + }; + if dup == ws::INVALID_SOCKET { + return Err(crate::stdlib::nt_support::win32_error_to_py( + unsafe { ws::WSAGetLastError() }, + None, + )); + } + Ok(dup as i64) +} + +/// `socket.dup()` — duplicate the underlying descriptor (see +/// [`dup_raw_fd`]) and wrap it in a fresh `socket` object that shares the +/// family/type/proto. The duplicate is independent: closing one leaves +/// the other usable, matching CPython's `socket.dup()`. +#[cfg(any(unix, windows))] fn sock_dup(args: &[Object]) -> Result { let state = state_of(args)?; let (family, kind, proto) = { @@ -2177,11 +2365,7 @@ fn sock_dup(args: &[Object]) -> Result { let b = state.borrow(); let sock = b.inner.as_ref().ok_or_else(closed_socket_error)?; let fd = raw_fd_of(sock).ok_or_else(|| os_error("socket has no file descriptor"))?; - let dup = unsafe { libc::dup(fd as i32) }; - if dup < 0 { - return Err(io_error_to_py(&std::io::Error::last_os_error())); - } - i64::from(dup) + dup_raw_fd(fd)? }; let inner = wrap_fd_socket(new_fd)?; let new_state = Rc::new(RefCell::new(SocketState { @@ -2215,13 +2399,11 @@ fn sock_dup(args: &[Object]) -> Result { Ok(Object::Instance(inst)) } -/// On non-Unix platforms WeavePy has no `dup(2)`-backed fd duplication, so -/// `socket.dup()` is unsupported (mirrors the `#[cfg(not(unix))]` stubs used -/// elsewhere in this module and in `select`). -#[cfg(not(unix))] +/// No descriptor-duplication primitive on other targets. +#[cfg(not(any(unix, windows)))] fn sock_dup(args: &[Object]) -> Result { let _ = state_of(args)?; - Err(os_error("socket.dup is only supported on Unix")) + Err(os_error("socket.dup is not supported on this platform")) } fn sock_makefile(args: &[Object]) -> Result { @@ -2578,8 +2760,9 @@ fn extract_bytes(arg: Option<&Object>) -> Result, RuntimeError> { // ---- module-level functions ---- -fn module_functions() -> &'static [(&'static str, fn(&[Object]) -> Result)] { - &[ +fn module_functions() -> Vec<(&'static str, fn(&[Object]) -> Result)> { + #[cfg_attr(not(unix), allow(unused_mut))] + let mut fns: Vec<(&'static str, fn(&[Object]) -> Result)> = vec![ ("gethostname", mod_gethostname), ("gethostbyname", mod_gethostbyname), ("gethostbyname_ex", mod_gethostbyname_ex), @@ -2602,44 +2785,38 @@ fn module_functions() -> &'static [(&'static str, fn(&[Object]) -> Result Result, + ), ("CMSG_SPACE", mod_cmsg_space), - ] + ]); + fns } /// `socket.CMSG_LEN(length)` — bytes an ancillary-data item of `length` /// payload occupies, including the `cmsghdr` (but not the trailing pad). +#[cfg(unix)] fn mod_cmsg_len(args: &[Object]) -> Result { - #[cfg(unix)] - { - let length = cmsg_size_arg(args.first())?; - Ok(Object::Int(i64::from(unsafe { libc::CMSG_LEN(length) }))) - } - #[cfg(not(unix))] - { - let _ = args; - Err(os_error("CMSG_LEN is not supported on this platform")) - } + let length = cmsg_size_arg(args.first())?; + Ok(Object::Int(i64::from(unsafe { libc::CMSG_LEN(length) }))) } /// `socket.CMSG_SPACE(length)` — bytes to allocate in a control buffer for /// one ancillary-data item of `length` payload, including alignment pad. +#[cfg(unix)] fn mod_cmsg_space(args: &[Object]) -> Result { - #[cfg(unix)] - { - let length = cmsg_size_arg(args.first())?; - Ok(Object::Int(i64::from(unsafe { libc::CMSG_SPACE(length) }))) - } - #[cfg(not(unix))] - { - let _ = args; - Err(os_error("CMSG_SPACE is not supported on this platform")) - } + let length = cmsg_size_arg(args.first())?; + Ok(Object::Int(i64::from(unsafe { libc::CMSG_SPACE(length) }))) } -#[allow(dead_code)] +#[cfg(unix)] fn cmsg_size_arg(arg: Option<&Object>) -> Result { match arg { Some(Object::Int(n)) if *n >= 0 => Ok(*n as u32), @@ -3015,11 +3192,121 @@ fn mod_getaddrinfo(args: &[Object]) -> Result { Ok(Object::new_list(out)) } -/// Non-POSIX fallback resolver over `std::net::ToSocketAddrs` (the -/// Windows libc crate exposes no `addrinfo` surface). Loses the hint -/// fidelity of the libc path (`AI_PASSIVE` wildcards, `AI_CANONNAME`) -/// but resolves names/ports correctly — the pre-RFC-0054 behavior. -#[cfg(not(unix))] +/// Windows arm (RFC 0063 WS4): the same call over Winsock's own +/// `getaddrinfo` (ANSI — host/service are idna/ASCII by the time they +/// reach the resolver, exactly the encoding CPython feeds its +/// `getaddrinfo` on Windows), restoring `AI_PASSIVE` wildcard and +/// `AI_CANONNAME` fidelity that the previous `ToSocketAddrs` +/// approximation lost. Mirrors the unix arm above, with windows-sys +/// types and the WSA error domain. +#[cfg(windows)] +fn mod_getaddrinfo(args: &[Object]) -> Result { + use std::ffi::{CStr, CString}; + use windows_sys::Win32::Networking::WinSock as ws; + let nul_err = || value_error("getaddrinfo: embedded null character in argument"); + let host: Option = match args.first() { + Some(Object::Str(s)) => Some(CString::new(s.as_bytes()).map_err(|_| nul_err())?), + Some(Object::Bytes(b)) => Some(CString::new(&b[..]).map_err(|_| nul_err())?), + Some(Object::None) | None => None, + _ => return Err(type_error("getaddrinfo: host must be str, bytes, or None")), + }; + let service: Option = match args.get(1) { + Some(Object::Int(n)) => Some(CString::new(n.to_string()).expect("digits have no NUL")), + Some(Object::Str(s)) => Some(CString::new(s.as_bytes()).map_err(|_| nul_err())?), + Some(Object::Bytes(b)) => Some(CString::new(&b[..]).map_err(|_| nul_err())?), + Some(Object::None) | None => None, + _ => { + return Err(type_error( + "getaddrinfo: port must be int, str, bytes, or None", + )) + } + }; + // `as_i64` unwraps IntEnum members too, like the unix arm. + let int_at = |i: usize| args.get(i).and_then(Object::as_i64).unwrap_or(0) as i32; + let (family, kind, proto, flags) = (int_at(2), int_at(3), int_at(4), int_at(5)); + + let hints = ws::ADDRINFOA { + ai_flags: flags, + // AF_UNSPEC is 0 on Windows too, so family passes through as-is. + ai_family: family, + ai_socktype: kind, + ai_protocol: proto, + ..Default::default() + }; + let host_ptr = host + .as_ref() + .map_or(std::ptr::null(), |c| c.as_ptr().cast::()); + let serv_ptr = service + .as_ref() + .map_or(std::ptr::null(), |c| c.as_ptr().cast::()); + let mut res: *mut ws::ADDRINFOA = std::ptr::null_mut(); + let res_ptr = std::ptr::addr_of_mut!(res); + let rc = crate::gil::allow_threads_then(|| unsafe { + ws::getaddrinfo(host_ptr, serv_ptr, &raw const hints, res_ptr) + }); + if rc != 0 { + // Winsock's getaddrinfo returns the WSA error code directly + // (WSAHOST_NOT_FOUND, …); CPython raises gaierror with + // gai_strerror text, which on Windows *is* FormatMessage. + return Err(gaierror(rc, crate::stdlib::nt_support::format_message(rc))); + } + + let mut out = Vec::new(); + let mut cur = res; + while !cur.is_null() { + // SAFETY: `cur` walks the linked list Winsock just handed us; it + // stays valid until the `freeaddrinfo` below. + let ai = unsafe { &*cur }; + cur = ai.ai_next; + let addr_tuple = match ai.ai_family { + f if f == i32::from(ws::AF_INET) => { + // Winsock allocates `ai_addr` with full sockaddr alignment; + // the SOCKADDR type is only declared 2-byte aligned. + #[allow(clippy::cast_ptr_alignment)] + let sin = unsafe { &*ai.ai_addr.cast::() }; + let ip = + std::net::Ipv4Addr::from(u32::from_be(unsafe { sin.sin_addr.S_un.S_addr })); + Object::new_tuple(vec![ + Object::from_str(ip.to_string()), + Object::Int(i64::from(u16::from_be(sin.sin_port))), + ]) + } + f if f == i32::from(ws::AF_INET6) => { + #[allow(clippy::cast_ptr_alignment)] // see AF_INET arm above + let sin6 = unsafe { &*ai.ai_addr.cast::() }; + let ip = std::net::Ipv6Addr::from(unsafe { sin6.sin6_addr.u.Byte }); + Object::new_tuple(vec![ + Object::from_str(ip.to_string()), + Object::Int(i64::from(u16::from_be(sin6.sin6_port))), + Object::Int(i64::from(u32::from_be(sin6.sin6_flowinfo))), + Object::Int(i64::from(unsafe { sin6.Anonymous.sin6_scope_id })), + ]) + } + _ => continue, + }; + let canonname = if ai.ai_canonname.is_null() { + Object::from_static("") + } else { + let c = unsafe { CStr::from_ptr(ai.ai_canonname.cast()) }; + Object::from_str(c.to_string_lossy().into_owned()) + }; + out.push(Object::new_tuple(vec![ + Object::Int(i64::from(ai.ai_family)), + Object::Int(i64::from(ai.ai_socktype)), + Object::Int(i64::from(ai.ai_protocol)), + canonname, + addr_tuple, + ])); + } + unsafe { ws::freeaddrinfo(res) }; + Ok(Object::new_list(out)) +} + +/// Fallback resolver over `std::net::ToSocketAddrs` for targets with +/// neither libc nor Winsock `addrinfo`. Loses the hint fidelity of the +/// native paths (`AI_PASSIVE` wildcards, `AI_CANONNAME`) but resolves +/// names/ports correctly — the pre-RFC-0054 behavior. +#[cfg(not(any(unix, windows)))] fn mod_getaddrinfo(args: &[Object]) -> Result { let host = match args.first() { Some(Object::Str(s)) => s.to_string(), @@ -3111,6 +3398,7 @@ fn mod_getaddrinfo_kw( mod_getaddrinfo(&positional) } +#[cfg(not(windows))] fn mod_getnameinfo(args: &[Object]) -> Result { let addr_obj = match args.first() { Some(o) => o, @@ -3134,6 +3422,98 @@ fn mod_getnameinfo(args: &[Object]) -> Result { ])) } +/// `getnameinfo(sockaddr, flags)` over Winsock (RFC 0063 WS4), following +/// CPython's `socket_getnameinfo` (socketmodule.c): the numeric host is +/// first re-parsed through `getaddrinfo(…, AI_NUMERICHOST)` to build the +/// binary sockaddr (patching in the 4-tuple's flowinfo/scope-id for +/// IPv6), which is then handed to `getnameinfo` with the caller's flags. +#[cfg(windows)] +fn mod_getnameinfo(args: &[Object]) -> Result { + use std::ffi::{CStr, CString}; + use windows_sys::Win32::Networking::WinSock as ws; + let tup = match args.first() { + Some(Object::Tuple(t)) => t, + Some(_) => return Err(type_error("getnameinfo: address must be tuple")), + None => return Err(type_error("getnameinfo: missing argument")), + }; + let host = match tup.first() { + Some(Object::Str(s)) => s.to_string(), + _ => return Err(type_error("getnameinfo: address[0] must be str")), + }; + let port = match tup.get(1) { + Some(Object::Int(n)) => *n as u16, + _ => return Err(type_error("getnameinfo: address[1] must be int")), + }; + let flowinfo = tup.get(2).and_then(Object::as_i64).unwrap_or(0) as u32; + let scope_id = tup.get(3).and_then(Object::as_i64).unwrap_or(0) as u32; + let flags = args.get(1).and_then(Object::as_i64).unwrap_or(0) as i32; + + let c_host = CString::new(host) + .map_err(|_| value_error("getnameinfo: embedded null character in argument"))?; + let c_serv = CString::new(port.to_string()).expect("digits have no NUL"); + let hints = ws::ADDRINFOA { + ai_flags: ws::AI_NUMERICHOST as i32, + ai_family: i32::from(ws::AF_UNSPEC), + // SOCK_DGRAM keeps the resolver from returning one row per + // socktype (CPython does the same). + ai_socktype: ws::SOCK_DGRAM, + ..Default::default() + }; + let mut res: *mut ws::ADDRINFOA = std::ptr::null_mut(); + let res_ptr = std::ptr::addr_of_mut!(res); + let host_ptr = c_host.as_ptr().cast::(); + let serv_ptr = c_serv.as_ptr().cast::(); + let rc = crate::gil::allow_threads_then(|| unsafe { + ws::getaddrinfo(host_ptr, serv_ptr, &raw const hints, res_ptr) + }); + if rc != 0 { + return Err(gaierror(rc, crate::stdlib::nt_support::format_message(rc))); + } + + // SAFETY: rc == 0 guarantees a non-null, valid result chain until + // the `freeaddrinfo` below. + let ai = unsafe { &*res }; + if i32::from(ws::AF_INET6) == ai.ai_family { + // The 4-tuple's flowinfo/scope-id aren't expressible in the + // numeric host string; CPython patches them into the sockaddr. + // Winsock allocates `ai_addr` with full sockaddr alignment. + #[allow(clippy::cast_ptr_alignment)] + let sin6 = unsafe { &mut *ai.ai_addr.cast::() }; + sin6.sin6_flowinfo = flowinfo.to_be(); + sin6.Anonymous.sin6_scope_id = scope_id; + } + let mut hostbuf = [0u8; ws::NI_MAXHOST as usize]; + let mut servbuf = [0u8; ws::NI_MAXSERV as usize]; + let (ai_addr, ai_addrlen) = (ai.ai_addr, ai.ai_addrlen); + let host_out = hostbuf.as_mut_ptr(); + let serv_out = servbuf.as_mut_ptr(); + let rc = crate::gil::allow_threads_then(|| unsafe { + ws::getnameinfo( + ai_addr, + ai_addrlen as ws::socklen_t, + host_out, + ws::NI_MAXHOST, + serv_out, + ws::NI_MAXSERV, + flags, + ) + }); + unsafe { ws::freeaddrinfo(res) }; + if rc != 0 { + return Err(gaierror(rc, crate::stdlib::nt_support::format_message(rc))); + } + let decode = |buf: &[u8]| -> String { + // SAFETY: getnameinfo NUL-terminates within the buffer on success. + unsafe { CStr::from_ptr(buf.as_ptr().cast()) } + .to_string_lossy() + .into_owned() + }; + Ok(Object::new_tuple(vec![ + Object::from_str(decode(&hostbuf)), + Object::from_str(decode(&servbuf)), + ])) +} + fn mod_create_connection(args: &[Object]) -> Result { // create_connection(address, timeout=...) returns a connected // socket.socket. We build one via socket_class(). diff --git a/crates/weavepy-vm/src/stdlib/sys.rs b/crates/weavepy-vm/src/stdlib/sys.rs index 3d603da0..807265f4 100644 --- a/crates/weavepy-vm/src/stdlib/sys.rs +++ b/crates/weavepy-vm/src/stdlib/sys.rs @@ -406,36 +406,9 @@ pub fn build_with_state( // `sys.builtin_module_names` — exposed as a tuple for // user-introspection code (e.g. `importlib.util.find_spec`). - // Only modules the VM builds *natively* belong here: names that - // ship as frozen Python source (random, json, re, …) must not - // appear, because stdlib consumers take membership as "no - // Python source exists" (`pyclbr._readmodule` early-returns an - // empty tree for them — `test_pyclbr.test_others`). d.insert( DictKey(Object::from_static("builtin_module_names")), - Object::new_tuple( - [ - "_csv", - "_datetime", - "_socket", - "_subprocess", - "_thread", - "_weakref", - "binascii", - "errno", - "gc", - "hashlib", - "math", - "os", - "pyexpat", - "sys", - "time", - "zlib", - ] - .iter() - .map(|s| Object::from_static(s)) - .collect(), - ), + builtin_module_names_value(), ); // sys.gettrace/getprofile stubs (no actual tracing yet). } @@ -512,6 +485,33 @@ pub fn build(cache: &ModuleCache) -> Rc { DictKey(Object::from_static("platform")), Object::from_static(host_platform()), ); + // RFC 0063 WS1 — the Windows identity surface. + #[cfg(windows)] + { + // CPython's `sys.winver` is the version tag its registry keys + // and DLL name carry (Python/sysmodule.c sets it from + // MS_DLL_ID); `sysconfig`/`venv`/pip read it on Windows. + d.insert( + DictKey(Object::from_static("winver")), + Object::from_static("3.13"), + ); + // CPython publishes the HMODULE of python3xx.dll here. WeavePy + // is a static executable with no python DLL (RFC 0063 + // Non-goals: the `python313.dll` restructure is its own wave), + // so the handle is 0. + d.insert(DictKey(Object::from_static("dllhandle")), Object::Int(0)); + d.insert( + DictKey(Object::from_static("getwindowsversion")), + builtin("getwindowsversion", sys_getwindowsversion), + ); + // PEP 529: WeavePy's filesystem encoding is permanently UTF-8. + // CPython's switch re-enables the pre-3.6 mbcs mode, which + // WeavePy never had — accept the call and do nothing. + d.insert( + DictKey(Object::from_static("_enablelegacywindowsfsencoding")), + builtin("_enablelegacywindowsfsencoding", |_| Ok(Object::None)), + ); + } // CPython-on-macOS build detail: the framework name when built // as a macOS framework, `""` otherwise (the common case, and // ours). `pydoc`/`platform`/`site` read it unconditionally. @@ -916,6 +916,106 @@ pub(crate) fn stdlib_zip_path() -> Option { Some(zip.to_string_lossy().into_owned()) } +/// `sys.builtin_module_names` — the per-OS truthful inventory (RFC 0063 +/// WS1). Only modules `register_all` (`stdlib/mod.rs`) builds *natively* +/// belong here: names that ship as frozen Python source (random, json, +/// re, …) must not appear, because stdlib consumers take membership as +/// "no Python source exists" (`pyclbr._readmodule` early-returns an +/// empty tree for them — `test_pyclbr.test_others`). The registration +/// table itself isn't enumerable from here without widening `mod.rs`, +/// so this list mirrors it by hand — keep the two in sync. +/// +/// Two deliberate exceptions, matching CPython's *observable* contract: +/// `posix` (unix) and `nt` (Windows) are listed even though WeavePy's +/// are frozen shims over the native `os`, because `Lib/os.py` itself +/// detects the platform via `'posix' in sys.builtin_module_names` / +/// `'nt' in ...` — those membership probes are the load-bearing +/// consumers. Sorted, as CPython's tuple is. +fn builtin_module_names_value() -> Object { + let mut names: Vec<&'static str> = vec![ + "_abc", + "_ast", + "_asyncio", + "_bisect", + "_blake2", + "_bz2", + "_codecs", + "_contextvars", + "_csv", + "_ctypes_native", + "_functools", + "_gzip", + "_heapq", + "_https", + "_imp", + "_io", + "_itertools", + "_json", + "_locale", + "_lzma", + "_md5", + "_multiprocessing", + "_operator", + "_random", + "_sha1", + "_sha2", + "_sha3", + "_signal", + "_socket", + "_sqlite3", + "_sre", + "_ssl", + "_statistics", + "_string", + "_struct", + "_subprocess", + "_symtable", + "_sysconfig", + "_testinternalcapi", + "_thread", + "_tokenize_core", + "_tracemalloc", + "_warnings", + "_weakref", + "_weave_frame", + "_xxsubinterpreters", + "atexit", + "binascii", + "cmath", + "errno", + "faulthandler", + "gc", + "hashlib", + "marshal", + "math", + "mmap", + "os", + "pyexpat", + "select", + "sys", + "time", + "unicodedata", + "zlib", + ]; + // POSIX-only registrations (`#[cfg(unix)]` in `register_all`), plus + // the `posix` shim exception documented above. + #[cfg(unix)] + names.extend([ + "_posixshmem", + "_posixsubprocess", + "fcntl", + "posix", + "resource", + "termios", + ]); + // The RFC 0063 Windows-native quartet (`#[cfg(windows)]` in + // `register_all`), plus the `nt` shim exception documented above. + #[cfg(windows)] + names.extend(["_overlapped", "_winapi", "msvcrt", "nt", "winreg"]); + names.sort_unstable(); + Object::new_tuple(names.into_iter().map(Object::from_static).collect()) +} + fn builtin(name: &'static str, body: fn(&[Object]) -> Result) -> Object { Object::Builtin(Rc::new(BuiltinFn { name, @@ -1464,6 +1564,95 @@ pub(crate) const SYS_FLAGS_FIELDS: &[&str] = &[ /// first failure were both this attribute). const VERSION_INFO_FIELDS: &[&str] = &["major", "minor", "micro", "releaselevel", "serial"]; +/// The visible (tuple-indexed) fields of `sys.getwindowsversion()` — +/// CPython's `windows_version_fields` has `n_in_sequence = 5`; the +/// remaining five members are attribute-only. +#[cfg(windows)] +const WINDOWS_VERSION_VISIBLE: [&str; 5] = ["major", "minor", "build", "platform", "service_pack"]; + +/// `sys.getwindowsversion()` — the 10-member struct sequence of +/// `Python/sysmodule.c`'s `sys_getwindowsversion_impl`. Sourced from +/// ntdll's `RtlGetVersion` rather than `GetVersionExW`: the latter lies +/// under the compatibility-manifest shims (an unmanifested process is +/// told "6.2" forever), which is the same problem CPython works around +/// by re-reading kernel32.dll's version resource. RtlGetVersion reports +/// the true version, so `platform_version` comes from the same call. +#[cfg(windows)] +fn sys_getwindowsversion(_args: &[Object]) -> Result { + use windows_sys::Win32::System::SystemInformation::OSVERSIONINFOEXW; + #[link(name = "ntdll")] + unsafe extern "system" { + fn RtlGetVersion(info: *mut OSVERSIONINFOEXW) -> i32; + } + let mut info: OSVERSIONINFOEXW = unsafe { std::mem::zeroed() }; + info.dwOSVersionInfoSize = std::mem::size_of::() as u32; + // NTSTATUS 0 == STATUS_SUCCESS; the call cannot fail for a + // correctly-sized buffer, but stay honest anyway. + if unsafe { RtlGetVersion(&raw mut info) } != 0 { + return Err(crate::error::os_error("RtlGetVersion failed")); + } + let ty = crate::stdlib::os::struct_seq_type_layout( + "getwindowsversion", + "sys", + [ + "major", + "minor", + "build", + "platform", + "service_pack", + "service_pack_major", + "service_pack_minor", + "suite_mask", + "product_type", + "platform_version", + ] + .iter() + .map(|f| Some(*f)) + .collect(), + WINDOWS_VERSION_VISIBLE.len(), + ); + let visible = vec![ + Object::Int(i64::from(info.dwMajorVersion)), + Object::Int(i64::from(info.dwMinorVersion)), + Object::Int(i64::from(info.dwBuildNumber)), + Object::Int(i64::from(info.dwPlatformId)), + Object::from_str(crate::stdlib::nt_support::from_wide_nul(&info.szCSDVersion)), + ]; + let obj = crate::stdlib::os::struct_seq_instance(ty, &WINDOWS_VERSION_VISIBLE, visible); + // The five hidden named members (attribute-only, exactly like + // `time.struct_time`'s `tm_zone`/`tm_gmtoff` extras): fill them + // straight into the instance dict, which bypasses the readonly + // `__setattr__` guard the struct-seq type installs. + if let Object::Instance(inst) = &obj { + let mut d = inst.dict.borrow_mut(); + d.insert( + DictKey(Object::from_static("service_pack_major")), + Object::Int(i64::from(info.wServicePackMajor)), + ); + d.insert( + DictKey(Object::from_static("service_pack_minor")), + Object::Int(i64::from(info.wServicePackMinor)), + ); + d.insert( + DictKey(Object::from_static("suite_mask")), + Object::Int(i64::from(info.wSuiteMask)), + ); + d.insert( + DictKey(Object::from_static("product_type")), + Object::Int(i64::from(info.wProductType)), + ); + d.insert( + DictKey(Object::from_static("platform_version")), + Object::new_tuple(vec![ + Object::Int(i64::from(info.dwMajorVersion)), + Object::Int(i64::from(info.dwMinorVersion)), + Object::Int(i64::from(info.dwBuildNumber)), + ]), + ); + } + Ok(obj) +} + fn version_info_value() -> Object { let ty = crate::stdlib::os::struct_seq_type("version_info", "sys", VERSION_INFO_FIELDS); let values = vec![ diff --git a/crates/weavepy-vm/src/stdlib/winapi_mod.rs b/crates/weavepy-vm/src/stdlib/winapi_mod.rs new file mode 100644 index 00000000..d58e9e72 --- /dev/null +++ b/crates/weavepy-vm/src/stdlib/winapi_mod.rs @@ -0,0 +1,1893 @@ +//! The `_winapi` built-in module (RFC 0063 WS2). +//! +//! The private Win32 surface `subprocess`, `multiprocessing`, and +//! `shutil` consume, transcribed from CPython 3.13's +//! `Modules/_winapi.c`. Names, argument order, and return *shapes* +//! match CPython exactly so the frozen Windows stdlib drives this +//! module unchanged: handles are plain Python ints (CPython's `_winapi` +//! only exposes the `Overlapped` helper type — `subprocess.py` supplies +//! its own `Handle(int)` subclass), `CreatePipe` returns +//! `(read, write)`, `CreateProcess` returns `(hp, ht, pid, tid)`, and +//! the overlapped I/O functions return `(Overlapped, err)`. +//! +//! Error handling follows CPython: a failed Win32 call raises the +//! `winerror`-truthful `OSError` +//! ([`nt_support::last_win32_error_to_py`], which fills +//! `.winerror`/`.errno`/`.strerror`). Every blocking wait +//! (`WaitFor*`, `ConnectNamedPipe`, sync `ReadFile`/`WriteFile`) +//! releases the GIL through [`crate::gil::allow_threads_then`], exactly +//! as CPython wraps them in `Py_BEGIN_ALLOW_THREADS`. +//! +//! Handles are represented unsigned (CPython's `HANDLE_TO_PYNUM` is +//! `PyLong_FromVoidPtr`), so `INVALID_HANDLE_VALUE` is the unsigned +//! `(uintptr_t)-1`, not `-1`. + +use std::collections::HashMap; +use std::ffi::c_void; +use std::sync::atomic::{AtomicI64, Ordering}; +use std::sync::Mutex; + +use num_traits::ToPrimitive; + +use crate::error::{type_error, value_error, RuntimeError}; +use crate::import::ModuleCache; +use crate::object::{BuiltinFn, DictData, DictKey, Object, PyModule}; +use crate::stdlib::nt_support::{self, wide}; +use crate::sync::Rc; +use crate::sync::RefCell; + +use windows_sys::Win32::Foundation as fnd; +use windows_sys::Win32::Globalization as glob; +use windows_sys::Win32::Security::SECURITY_ATTRIBUTES; +use windows_sys::Win32::Storage::FileSystem as fs; +use windows_sys::Win32::System::Console as con; +use windows_sys::Win32::System::LibraryLoader as libl; +use windows_sys::Win32::System::Memory as mem; +use windows_sys::Win32::System::Pipes as pipes; +use windows_sys::Win32::System::Threading as thr; +use windows_sys::Win32::System::IO as wio; + +use fnd::HANDLE; + +// Win32 error codes the control flow branches on (winerror.h). The +// module also *publishes* these plus many more (see `constants`). +const ERROR_SUCCESS: u32 = 0; +const ERROR_BROKEN_PIPE: u32 = 109; +const ERROR_MORE_DATA: u32 = 234; +const ERROR_IO_INCOMPLETE: u32 = 996; +const ERROR_IO_PENDING: u32 = 997; +const ERROR_OPERATION_ABORTED: u32 = 995; +const ERROR_NOT_FOUND: u32 = 1168; + +const INFINITE: u32 = 0xFFFF_FFFF; + +pub fn build(_cache: &ModuleCache) -> Rc { + let dict = Rc::new(RefCell::new(DictData::default())); + { + let mut d = dict.borrow_mut(); + d.insert( + DictKey(Object::from_static("__name__")), + Object::from_static("_winapi"), + ); + d.insert(DictKey(Object::from_static("__doc__")), Object::None); + + // Every `_winapi` function is registered keyword-capable: CPython + // clinic-generates keyword support for the whole surface, and the + // frozen stdlib calls several with keywords (`overlapped=True`, + // `milliseconds=...`). + let mut reg = + |name: &'static str, + body: fn(&[Object], &[(String, Object)]) -> Result| { + d.insert( + DictKey(Object::from_static(name)), + crate::stdlib::os::builtin_kw(name, body), + ); + }; + reg("CloseHandle", win_close_handle); + reg("GetLastError", win_get_last_error); + reg("GetACP", win_get_acp); + reg("GetVersion", win_get_version); + reg("GetCurrentProcess", win_get_current_process); + reg("GetExitCodeProcess", win_get_exit_code_process); + reg("GetFileType", win_get_file_type); + reg("GetLongPathName", win_get_long_path_name); + reg("GetModuleFileName", win_get_module_file_name); + reg("GetStdHandle", win_get_std_handle); + reg("ExitProcess", win_exit_process); + reg("TerminateProcess", win_terminate_process); + reg("OpenProcess", win_open_process); + reg("DuplicateHandle", win_duplicate_handle); + reg("WaitForSingleObject", win_wait_for_single_object); + reg("WaitForMultipleObjects", win_wait_for_multiple_objects); + reg("CreateEventW", win_create_event); + reg("OpenEventW", win_open_event); + reg("SetEvent", win_set_event); + reg("ResetEvent", win_reset_event); + reg("CreateMutexW", win_create_mutex); + reg("OpenMutexW", win_open_mutex); + reg("ReleaseMutex", win_release_mutex); + reg("CreatePipe", win_create_pipe); + reg("CreateNamedPipe", win_create_named_pipe); + reg("ConnectNamedPipe", win_connect_named_pipe); + reg("WaitNamedPipe", win_wait_named_pipe); + reg("PeekNamedPipe", win_peek_named_pipe); + reg("SetNamedPipeHandleState", win_set_named_pipe_handle_state); + reg("CreateFile", win_create_file); + reg("ReadFile", win_read_file); + reg("WriteFile", win_write_file); + reg("CreateFileMapping", win_create_file_mapping); + reg("OpenFileMapping", win_open_file_mapping); + reg("MapViewOfFile", win_map_view_of_file); + reg("UnmapViewOfFile", win_unmap_view_of_file); + reg("VirtualQuerySize", win_virtual_query_size); + reg("CreateProcess", win_create_process); + reg("CreateJunction", win_create_junction); + reg("NeedCurrentDirectoryForExePath", win_need_cwd_for_exe_path); + reg("CopyFile2", win_copy_file2); + reg("LCMapStringEx", win_lcmapstring_ex); + + for (name, val) in constants() { + d.insert(DictKey(Object::from_static(name)), Object::Int(val)); + } + // INVALID_HANDLE_VALUE is `(uintptr_t)-1` — an unsigned int too + // large for `i64`; publish it through the unsigned handle path. + d.insert( + DictKey(Object::from_static("INVALID_HANDLE_VALUE")), + handle_to_object(usize::MAX), + ); + // `LOCALE_NAME_*` for LCMapStringEx: invariant is the empty + // string, user-default is `None`, system-default the magic name. + d.insert( + DictKey(Object::from_static("LOCALE_NAME_INVARIANT")), + Object::from_static(""), + ); + d.insert( + DictKey(Object::from_static("LOCALE_NAME_SYSTEM_DEFAULT")), + Object::from_static("!x-sys-default-locale"), + ); + d.insert( + DictKey(Object::from_static("LOCALE_NAME_USER_DEFAULT")), + Object::None, + ); + } + Rc::new(PyModule { + name: "_winapi".to_owned(), + filename: None, + dict, + }) +} + +// --------------------------------------------------------------------------- +// Handle / argument marshalling. +// --------------------------------------------------------------------------- + +/// A HANDLE (or any pointer-sized value) as a Python int. CPython's +/// `HANDLE_TO_PYNUM` is `PyLong_FromVoidPtr`, i.e. *unsigned*, so a +/// handle with the high bit set does not surface negative. +pub(crate) fn handle_to_object(v: usize) -> Object { + Object::int_from_i128(v as i128) +} + +/// The unsigned pointer bit-pattern of an integer argument. Accepts the +/// arbitrary-precision arc so `INVALID_HANDLE_VALUE` (round-tripped as a +/// large `Long`) parses back to the same bits. +fn obj_to_usize(o: &Object) -> Option { + let bits: u64 = match o { + Object::Bool(b) => u64::from(*b), + Object::Int(i) => *i as u64, + Object::Long(b) => b.to_u64().or_else(|| b.to_i64().map(|v| v as u64))?, + // An `int` subclass instance (subprocess.py's `Handle`) wraps its + // primitive value — CPython's HANDLE converter is `PyLong_AsVoidPtr`, + // which accepts these. The wrapped value is always a primitive, so + // this recurses exactly once. + Object::Instance(inst) => return inst.native.get().and_then(obj_to_usize), + _ => return None, + }; + Some(bits as usize) +} + +/// Parse positional argument `idx` as a HANDLE. +pub(crate) fn handle_arg(args: &[Object], idx: usize, func: &str) -> Result { + args.get(idx) + .and_then(obj_to_usize) + .map(|v| v as HANDLE) + .ok_or_else(|| type_error(format!("{func}: argument {} must be a handle", idx + 1))) +} + +fn int_arg(o: Option<&Object>, func: &str, which: &str) -> Result { + o.and_then(Object::as_i64) + .ok_or_else(|| type_error(format!("{func}: {which} must be an int"))) +} + +/// Fetch an argument by position, falling back to a keyword of the same +/// clinic name. CPython accepts both forms for every parameter. +fn pick<'a>( + args: &'a [Object], + kw: &'a [(String, Object)], + pos: usize, + name: &str, +) -> Option<&'a Object> { + args.get(pos) + .or_else(|| kw.iter().find(|(k, _)| k == name).map(|(_, v)| v)) +} + +/// A `str`/`WStr` argument decoded to a Rust `String` (surrogate code +/// points pass through lossily — the wide re-encode is exact for the +/// BMP-only paths these functions take). +fn str_arg(o: Option<&Object>, func: &str, which: &str) -> Result { + match o { + Some(Object::Str(s)) => Ok(s.to_string()), + Some(Object::WStr(cps)) => Ok(String::from_utf16_lossy( + &cps.iter().map(|&c| c as u16).collect::>(), + )), + _ => Err(type_error(format!("{func}: {which} must be a str"))), + } +} + +/// `None`/absent → `NULL` path for an optional wide-string argument. +fn opt_str_arg( + o: Option<&Object>, + func: &str, + which: &str, +) -> Result, RuntimeError> { + match o { + None | Some(Object::None) => Ok(None), + _ => str_arg(o, func, which).map(Some), + } +} + +/// A `SECURITY_ATTRIBUTES*` from an argument. CPython's `subprocess`/ +/// `multiprocessing` always pass `None` here (they arrange inheritance +/// through handle-inheritance flags, not a descriptor), so `None` → NULL +/// covers the live callers; an integer is honoured as a raw pointer for +/// parity with CPython's converter. +fn sec_attr_ptr(o: Option<&Object>) -> *const SECURITY_ATTRIBUTES { + match o { + Some(o) if !matches!(o, Object::None) => { + obj_to_usize(o).map_or(std::ptr::null(), |v| v as *const SECURITY_ATTRIBUTES) + } + _ => std::ptr::null(), + } +} + +fn extract_handle_seq(o: &Object) -> Option> { + let items: Vec = match o { + Object::Tuple(t) => t.to_vec(), + Object::List(l) => l.borrow().clone(), + _ => return None, + }; + items + .iter() + .map(obj_to_usize) + .map(|v| v.map(|h| h as HANDLE)) + .collect() +} + +// --------------------------------------------------------------------------- +// Misc / info functions. +// --------------------------------------------------------------------------- + +fn win_close_handle(args: &[Object], _kw: &[(String, Object)]) -> Result { + let h = handle_arg(args, 0, "CloseHandle")?; + if unsafe { fnd::CloseHandle(h) } == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +fn win_get_last_error(_args: &[Object], _kw: &[(String, Object)]) -> Result { + Ok(Object::Int(i64::from(unsafe { fnd::GetLastError() }))) +} + +fn win_get_acp(_args: &[Object], _kw: &[(String, Object)]) -> Result { + Ok(Object::Int(i64::from(unsafe { glob::GetACP() }))) +} + +fn win_get_version(_args: &[Object], _kw: &[(String, Object)]) -> Result { + // GetVersion is deprecated but still what CPython's `_winapi.GetVersion` + // (and `sys.getwindowsversion`'s fast path) returns. + Ok(Object::Int(i64::from(unsafe { + windows_sys::Win32::System::SystemInformation::GetVersion() + }))) +} + +fn win_get_current_process( + _args: &[Object], + _kw: &[(String, Object)], +) -> Result { + Ok(handle_to_object( + unsafe { thr::GetCurrentProcess() } as usize + )) +} + +fn win_get_exit_code_process( + args: &[Object], + _kw: &[(String, Object)], +) -> Result { + let h = handle_arg(args, 0, "GetExitCodeProcess")?; + let mut code: u32 = 0; + if unsafe { thr::GetExitCodeProcess(h, &raw mut code) } == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::Int(i64::from(code))) +} + +fn win_get_file_type(args: &[Object], _kw: &[(String, Object)]) -> Result { + let h = handle_arg(args, 0, "GetFileType")?; + // GetFileType returns FILE_TYPE_UNKNOWN both for a genuine unknown + // type and for failure; CPython disambiguates via GetLastError. + let ty = unsafe { fs::GetFileType(h) }; + if ty == 0 { + let err = unsafe { fnd::GetLastError() }; + if err != ERROR_SUCCESS { + return Err(nt_support::last_win32_error_to_py(None)); + } + } + Ok(Object::Int(i64::from(ty))) +} + +/// `GetLongPathName(path)` — expand 8.3 short components (`RUNNER~1`) +/// to their long spellings. venv's `_same_path` (gh-90329) calls this +/// to recognize a short and a long spelling of the same executable +/// path, guarded only by `except OSError` — so the name must exist. +fn win_get_long_path_name( + args: &[Object], + _kw: &[(String, Object)], +) -> Result { + let path = str_arg(args.first(), "GetLongPathName", "path")?; + let wpath = wide(&path); + // CPython's pattern: size probe (returns the required length + // including the NUL), then fill. + let needed = unsafe { fs::GetLongPathNameW(wpath.as_ptr(), std::ptr::null_mut(), 0) }; + if needed == 0 { + return Err(nt_support::last_win32_error_to_py(Some(&path))); + } + let mut buf = vec![0u16; needed as usize]; + let n = unsafe { fs::GetLongPathNameW(wpath.as_ptr(), buf.as_mut_ptr(), buf.len() as u32) }; + if n == 0 || n as usize >= buf.len() { + return Err(nt_support::last_win32_error_to_py(Some(&path))); + } + Ok(Object::from_str(nt_support::from_wide(&buf[..n as usize]))) +} + +fn win_get_module_file_name( + args: &[Object], + _kw: &[(String, Object)], +) -> Result { + let module = handle_arg(args, 0, "GetModuleFileName")?; + let mut buf = vec![0u16; 260]; + loop { + let n = unsafe { + libl::GetModuleFileNameW(module as fnd::HMODULE, buf.as_mut_ptr(), buf.len() as u32) + }; + if n == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + // A return equal to the buffer size means truncation (the string + // was at least that long); grow and retry. + if (n as usize) < buf.len() { + return Ok(Object::from_str(nt_support::from_wide(&buf[..n as usize]))); + } + buf.resize(buf.len() * 2, 0); + } +} + +fn win_get_std_handle(args: &[Object], _kw: &[(String, Object)]) -> Result { + let n = int_arg(args.first(), "GetStdHandle", "std_handle")? as u32; + let h = unsafe { con::GetStdHandle(n) }; + if h == fnd::INVALID_HANDLE_VALUE { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(handle_to_object(h as usize)) +} + +fn win_exit_process(args: &[Object], _kw: &[(String, Object)]) -> Result { + let code = int_arg(args.first(), "ExitProcess", "exit_code")? as u32; + // Diverges (`-> !`); coerces to the Result return type. + unsafe { thr::ExitProcess(code) } +} + +fn win_terminate_process( + args: &[Object], + _kw: &[(String, Object)], +) -> Result { + let h = handle_arg(args, 0, "TerminateProcess")?; + let code = int_arg(args.get(1), "TerminateProcess", "exit_code")? as u32; + if unsafe { thr::TerminateProcess(h, code) } == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +fn win_open_process(args: &[Object], _kw: &[(String, Object)]) -> Result { + let access = int_arg(args.first(), "OpenProcess", "desired_access")? as u32; + let inherit = args.get(1).is_some_and(Object::is_truthy); + let pid = int_arg(args.get(2), "OpenProcess", "process_id")? as u32; + let h = unsafe { thr::OpenProcess(access, i32::from(inherit), pid) }; + if h.is_null() { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(handle_to_object(h as usize)) +} + +fn win_duplicate_handle(args: &[Object], kw: &[(String, Object)]) -> Result { + let src_proc = handle_arg(args, 0, "DuplicateHandle")?; + let src = handle_arg(args, 1, "DuplicateHandle")?; + let tgt_proc = handle_arg(args, 2, "DuplicateHandle")?; + let access = int_arg( + pick(args, kw, 3, "desired_access"), + "DuplicateHandle", + "desired_access", + )? as u32; + let inherit = pick(args, kw, 4, "inherit_handle").is_some_and(Object::is_truthy); + let options = pick(args, kw, 5, "options") + .and_then(Object::as_i64) + .unwrap_or(0) as u32; + let mut target: HANDLE = std::ptr::null_mut(); + let ok = unsafe { + fnd::DuplicateHandle( + src_proc, + src, + tgt_proc, + &raw mut target, + access, + i32::from(inherit), + options, + ) + }; + if ok == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(handle_to_object(target as usize)) +} + +// --------------------------------------------------------------------------- +// Synchronization objects. +// --------------------------------------------------------------------------- + +fn wait_gil(handle: HANDLE, ms: u32) -> u32 { + // A zero timeout is a pure poll — no point paying the GIL round-trip. + if ms == 0 { + unsafe { thr::WaitForSingleObject(handle, 0) } + } else { + crate::gil::allow_threads_then(|| unsafe { thr::WaitForSingleObject(handle, ms) }) + } +} + +fn win_wait_for_single_object( + args: &[Object], + kw: &[(String, Object)], +) -> Result { + let h = handle_arg(args, 0, "WaitForSingleObject")?; + let ms = int_arg( + pick(args, kw, 1, "milliseconds"), + "WaitForSingleObject", + "milliseconds", + )? as u32; + let res = wait_gil(h, ms); + if res == fnd::WAIT_FAILED { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::Int(i64::from(res))) +} + +fn win_wait_for_multiple_objects( + args: &[Object], + kw: &[(String, Object)], +) -> Result { + let handles = args.first().and_then(extract_handle_seq).ok_or_else(|| { + type_error("WaitForMultipleObjects: handle_seq must be a sequence of handles") + })?; + // MAXIMUM_WAIT_OBJECTS (winnt.h) — the kernel's hard cap on a single + // WaitForMultipleObjects call. + if handles.len() > 64 { + return Err(value_error("need at most 64 handles")); + } + let wait_all = pick(args, kw, 1, "wait_flag").is_some_and(Object::is_truthy); + let ms = pick(args, kw, 2, "milliseconds") + .and_then(Object::as_i64) + .map_or(INFINITE, |v| v as u32); + // GIL-released for any non-zero timeout (CPython always releases it + // here; we keep the zero-timeout poll on-thread). + let res = if ms == 0 { + unsafe { + thr::WaitForMultipleObjects( + handles.len() as u32, + handles.as_ptr(), + i32::from(wait_all), + 0, + ) + } + } else { + crate::gil::allow_threads_then(|| unsafe { + thr::WaitForMultipleObjects( + handles.len() as u32, + handles.as_ptr(), + i32::from(wait_all), + ms, + ) + }) + }; + if res == fnd::WAIT_FAILED { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::Int(i64::from(res))) +} + +fn win_create_event(args: &[Object], kw: &[(String, Object)]) -> Result { + let sec = sec_attr_ptr(pick(args, kw, 0, "security_attributes")); + let manual_reset = pick(args, kw, 1, "manual_reset").is_some_and(Object::is_truthy); + let initial_state = pick(args, kw, 2, "initial_state").is_some_and(Object::is_truthy); + let name = opt_str_arg(pick(args, kw, 3, "name"), "CreateEventW", "name")?; + let name_w = name.as_deref().map(wide); + let h = unsafe { + thr::CreateEventW( + sec, + i32::from(manual_reset), + i32::from(initial_state), + name_w.as_ref().map_or(std::ptr::null(), |v| v.as_ptr()), + ) + }; + if h.is_null() { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(handle_to_object(h as usize)) +} + +fn win_open_event(args: &[Object], kw: &[(String, Object)]) -> Result { + let access = int_arg( + pick(args, kw, 0, "desired_access"), + "OpenEventW", + "desired_access", + )? as u32; + let inherit = pick(args, kw, 1, "inherit_handle").is_some_and(Object::is_truthy); + let name = str_arg(pick(args, kw, 2, "name"), "OpenEventW", "name")?; + let name_w = wide(&name); + let h = unsafe { thr::OpenEventW(access, i32::from(inherit), name_w.as_ptr()) }; + if h.is_null() { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(handle_to_object(h as usize)) +} + +fn win_set_event(args: &[Object], _kw: &[(String, Object)]) -> Result { + let h = handle_arg(args, 0, "SetEvent")?; + if unsafe { thr::SetEvent(h) } == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +fn win_reset_event(args: &[Object], _kw: &[(String, Object)]) -> Result { + let h = handle_arg(args, 0, "ResetEvent")?; + if unsafe { thr::ResetEvent(h) } == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +fn win_create_mutex(args: &[Object], kw: &[(String, Object)]) -> Result { + let sec = sec_attr_ptr(pick(args, kw, 0, "security_attributes")); + let initial_owner = pick(args, kw, 1, "initial_owner").is_some_and(Object::is_truthy); + let name = opt_str_arg(pick(args, kw, 2, "name"), "CreateMutexW", "name")?; + let name_w = name.as_deref().map(wide); + let h = unsafe { + thr::CreateMutexW( + sec, + i32::from(initial_owner), + name_w.as_ref().map_or(std::ptr::null(), |v| v.as_ptr()), + ) + }; + if h.is_null() { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(handle_to_object(h as usize)) +} + +fn win_open_mutex(args: &[Object], kw: &[(String, Object)]) -> Result { + let access = int_arg( + pick(args, kw, 0, "desired_access"), + "OpenMutexW", + "desired_access", + )? as u32; + let inherit = pick(args, kw, 1, "inherit_handle").is_some_and(Object::is_truthy); + let name = str_arg(pick(args, kw, 2, "name"), "OpenMutexW", "name")?; + let name_w = wide(&name); + let h = unsafe { thr::OpenMutexW(access, i32::from(inherit), name_w.as_ptr()) }; + if h.is_null() { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(handle_to_object(h as usize)) +} + +fn win_release_mutex(args: &[Object], _kw: &[(String, Object)]) -> Result { + let h = handle_arg(args, 0, "ReleaseMutex")?; + if unsafe { thr::ReleaseMutex(h) } == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +// --------------------------------------------------------------------------- +// Pipes and files. +// --------------------------------------------------------------------------- + +fn win_create_pipe(args: &[Object], kw: &[(String, Object)]) -> Result { + // `pipe_attrs` is accepted for signature parity and ignored, exactly + // as CPython's `_winapi.CreatePipe` passes `NULL`. + let _pipe_attrs = pick(args, kw, 0, "pipe_attrs"); + let size = pick(args, kw, 1, "size") + .and_then(Object::as_i64) + .unwrap_or(0) as u32; + let mut read: HANDLE = std::ptr::null_mut(); + let mut write: HANDLE = std::ptr::null_mut(); + let ok = crate::gil::allow_threads_then(|| unsafe { + pipes::CreatePipe(&raw mut read, &raw mut write, std::ptr::null(), size) + }); + if ok == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::new_tuple(vec![ + handle_to_object(read as usize), + handle_to_object(write as usize), + ])) +} + +fn win_create_named_pipe(args: &[Object], kw: &[(String, Object)]) -> Result { + let name = str_arg(pick(args, kw, 0, "name"), "CreateNamedPipe", "name")?; + let open_mode = int_arg( + pick(args, kw, 1, "open_mode"), + "CreateNamedPipe", + "open_mode", + )? as u32; + let pipe_mode = int_arg( + pick(args, kw, 2, "pipe_mode"), + "CreateNamedPipe", + "pipe_mode", + )? as u32; + let max_instances = int_arg( + pick(args, kw, 3, "max_instances"), + "CreateNamedPipe", + "max_instances", + )? as u32; + let out_size = int_arg( + pick(args, kw, 4, "out_buffer_size"), + "CreateNamedPipe", + "out_buffer_size", + )? as u32; + let in_size = int_arg( + pick(args, kw, 5, "in_buffer_size"), + "CreateNamedPipe", + "in_buffer_size", + )? as u32; + let default_timeout = int_arg( + pick(args, kw, 6, "default_timeout"), + "CreateNamedPipe", + "default_timeout", + )? as u32; + let sec = sec_attr_ptr(pick(args, kw, 7, "security_attributes")); + let name_w = wide(&name); + let h = unsafe { + pipes::CreateNamedPipeW( + name_w.as_ptr(), + open_mode, + pipe_mode, + max_instances, + out_size, + in_size, + default_timeout, + sec, + ) + }; + if h == fnd::INVALID_HANDLE_VALUE { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(handle_to_object(h as usize)) +} + +fn win_connect_named_pipe( + args: &[Object], + kw: &[(String, Object)], +) -> Result { + let h = handle_arg(args, 0, "ConnectNamedPipe")?; + let overlapped = pick(args, kw, 1, "overlapped").is_some_and(Object::is_truthy); + if overlapped { + let ov = OverlappedObject::new(h, false, None); + let ovp = ov.overlapped_ptr(); + let ret = unsafe { pipes::ConnectNamedPipe(h, ovp) }; + let err = if ret != 0 { + ERROR_SUCCESS + } else { + unsafe { fnd::GetLastError() } + }; + match err { + ERROR_IO_PENDING => ov.set_pending(true), + // A client that connected between CreateNamedPipe and here + // reports PIPE_CONNECTED; CPython treats that as done. + 535 /* ERROR_PIPE_CONNECTED */ | ERROR_SUCCESS => ov.set_pending(false), + _ => { + ov.discard(); + return Err(nt_support::win32_error_to_py(err as i32, None)); + } + } + return Ok(ov.into_object()); + } + let ok = crate::gil::allow_threads_then(|| unsafe { + pipes::ConnectNamedPipe(h, std::ptr::null_mut()) + }); + // ERROR_PIPE_CONNECTED is success for a synchronous connect too. + if ok == 0 { + let err = unsafe { fnd::GetLastError() }; + if err != 535 { + return Err(nt_support::win32_error_to_py(err as i32, None)); + } + } + Ok(Object::None) +} + +fn win_wait_named_pipe(args: &[Object], kw: &[(String, Object)]) -> Result { + let name = str_arg(pick(args, kw, 0, "name"), "WaitNamedPipe", "name")?; + let timeout = int_arg(pick(args, kw, 1, "timeout"), "WaitNamedPipe", "timeout")? as u32; + let name_w = wide(&name); + let ok = crate::gil::allow_threads_then(|| unsafe { + pipes::WaitNamedPipeW(name_w.as_ptr(), timeout) + }); + if ok == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +fn win_peek_named_pipe(args: &[Object], kw: &[(String, Object)]) -> Result { + let h = handle_arg(args, 0, "PeekNamedPipe")?; + let size = pick(args, kw, 1, "size") + .and_then(Object::as_i64) + .unwrap_or(0); + if size < 0 { + return Err(value_error("negative size")); + } + let mut read: u32 = 0; + let mut avail: u32 = 0; + let mut left: u32 = 0; + if size == 0 { + // Query-only form: (bytes_available, bytes_left_this_message). + let ok = unsafe { + pipes::PeekNamedPipe( + h, + std::ptr::null_mut(), + 0, + std::ptr::null_mut(), + &raw mut avail, + &raw mut left, + ) + }; + if ok == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + return Ok(Object::new_tuple(vec![ + Object::Int(i64::from(avail)), + Object::Int(i64::from(left)), + ])); + } + let mut buf = vec![0u8; size as usize]; + let ok = unsafe { + pipes::PeekNamedPipe( + h, + buf.as_mut_ptr().cast::(), + size as u32, + &raw mut read, + &raw mut avail, + &raw mut left, + ) + }; + // CPython tolerates ERROR_MORE_DATA (the peek buffer was smaller than + // the message) and returns the partial read. + if ok == 0 { + let err = unsafe { fnd::GetLastError() }; + if err != ERROR_MORE_DATA { + return Err(nt_support::win32_error_to_py(err as i32, None)); + } + } + buf.truncate(read as usize); + Ok(Object::new_tuple(vec![ + Object::new_bytes(buf), + Object::Int(i64::from(avail)), + Object::Int(i64::from(left)), + ])) +} + +fn win_set_named_pipe_handle_state( + args: &[Object], + kw: &[(String, Object)], +) -> Result { + let h = handle_arg(args, 0, "SetNamedPipeHandleState")?; + // Each of mode / max_collection_count / collect_data_timeout is + // independently `None`-able (pass NULL to leave it unchanged). + let mode = pick(args, kw, 1, "mode") + .and_then(Object::as_i64) + .map(|v| v as u32); + let max_collect = pick(args, kw, 2, "max_collection_count") + .and_then(Object::as_i64) + .map(|v| v as u32); + let timeout = pick(args, kw, 3, "collect_data_timeout") + .and_then(Object::as_i64) + .map(|v| v as u32); + let ok = unsafe { + pipes::SetNamedPipeHandleState( + h, + mode.as_ref() + .map_or(std::ptr::null(), std::ptr::from_ref::), + max_collect + .as_ref() + .map_or(std::ptr::null(), std::ptr::from_ref::), + timeout + .as_ref() + .map_or(std::ptr::null(), std::ptr::from_ref::), + ) + }; + if ok == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +fn win_create_file(args: &[Object], kw: &[(String, Object)]) -> Result { + let name = str_arg(pick(args, kw, 0, "file_name"), "CreateFile", "file_name")?; + let access = int_arg( + pick(args, kw, 1, "desired_access"), + "CreateFile", + "desired_access", + )? as u32; + let share = int_arg(pick(args, kw, 2, "share_mode"), "CreateFile", "share_mode")? as u32; + let sec = sec_attr_ptr(pick(args, kw, 3, "security_attributes")); + let disp = int_arg( + pick(args, kw, 4, "creation_disposition"), + "CreateFile", + "creation_disposition", + )? as u32; + let flags = int_arg( + pick(args, kw, 5, "flags_and_attributes"), + "CreateFile", + "flags_and_attributes", + )? as u32; + let template = pick(args, kw, 6, "template_file") + .and_then(obj_to_usize) + .unwrap_or(0) as HANDLE; + let name_w = wide(&name); + let h = unsafe { fs::CreateFileW(name_w.as_ptr(), access, share, sec, disp, flags, template) }; + if h == fnd::INVALID_HANDLE_VALUE { + return Err(nt_support::last_win32_error_to_py(Some(&name))); + } + Ok(handle_to_object(h as usize)) +} + +fn win_read_file(args: &[Object], kw: &[(String, Object)]) -> Result { + let h = handle_arg(args, 0, "ReadFile")?; + let size = int_arg(pick(args, kw, 1, "size"), "ReadFile", "size")?; + if size < 0 { + return Err(value_error("negative size")); + } + let overlapped = pick(args, kw, 2, "overlapped").is_some_and(Object::is_truthy); + let size = size as usize; + + if overlapped { + let ov = OverlappedObject::new(h, false, Some(vec![0u8; size])); + let ovp = ov.overlapped_ptr(); + let (bufptr, buflen) = ov.buffer_ptr_len(); + let mut nread: u32 = 0; + let ret = unsafe { fs::ReadFile(h, bufptr, buflen as u32, &raw mut nread, ovp) }; + let err = if ret != 0 { + ERROR_SUCCESS + } else { + unsafe { fnd::GetLastError() } + }; + match err { + ERROR_BROKEN_PIPE => ov.set_pending(false), + ERROR_SUCCESS | ERROR_MORE_DATA | ERROR_IO_PENDING => ov.set_pending(true), + _ => { + ov.discard(); + return Err(nt_support::win32_error_to_py(err as i32, None)); + } + } + return Ok(Object::new_tuple(vec![ + ov.into_object(), + Object::Int(i64::from(err)), + ])); + } + + let mut buf = vec![0u8; size]; + let mut nread: u32 = 0; + let bufptr = buf.as_mut_ptr(); + let ret = crate::gil::allow_threads_then(|| unsafe { + fs::ReadFile(h, bufptr, size as u32, &raw mut nread, std::ptr::null_mut()) + }); + let err = if ret != 0 { + ERROR_SUCCESS + } else { + unsafe { fnd::GetLastError() } + }; + match err { + ERROR_BROKEN_PIPE => Ok(Object::new_tuple(vec![ + Object::new_bytes(Vec::new()), + Object::Int(i64::from(err)), + ])), + ERROR_SUCCESS | ERROR_MORE_DATA => { + buf.truncate(nread as usize); + Ok(Object::new_tuple(vec![ + Object::new_bytes(buf), + Object::Int(i64::from(err)), + ])) + } + _ => Err(nt_support::win32_error_to_py(err as i32, None)), + } +} + +fn win_write_file(args: &[Object], kw: &[(String, Object)]) -> Result { + let h = handle_arg(args, 0, "WriteFile")?; + let data = pick(args, kw, 1, "buffer") + .and_then(Object::as_bytes_view) + .ok_or_else(|| type_error("WriteFile: buffer must be a bytes-like object"))?; + let overlapped = pick(args, kw, 2, "overlapped").is_some_and(Object::is_truthy); + + if overlapped { + // The buffer must outlive the async write; the Overlapped owns it. + let ov = OverlappedObject::new(h, true, Some(data)); + let ovp = ov.overlapped_ptr(); + let (bufptr, buflen) = ov.buffer_ptr_len(); + let mut written: u32 = 0; + let ret = + unsafe { fs::WriteFile(h, bufptr.cast_const(), buflen as u32, &raw mut written, ovp) }; + let err = if ret != 0 { + ERROR_SUCCESS + } else { + unsafe { fnd::GetLastError() } + }; + match err { + ERROR_SUCCESS | ERROR_IO_PENDING => ov.set_pending(true), + _ => { + ov.discard(); + return Err(nt_support::win32_error_to_py(err as i32, None)); + } + } + return Ok(Object::new_tuple(vec![ + ov.into_object(), + Object::Int(i64::from(err)), + ])); + } + + let mut written: u32 = 0; + let dptr = data.as_ptr(); + let dlen = data.len(); + let ret = crate::gil::allow_threads_then(|| unsafe { + fs::WriteFile(h, dptr, dlen as u32, &raw mut written, std::ptr::null_mut()) + }); + if ret == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::new_tuple(vec![ + Object::Int(i64::from(written)), + Object::Int(0), + ])) +} + +// --------------------------------------------------------------------------- +// File mappings (the shared_memory NT backend). +// --------------------------------------------------------------------------- + +fn win_create_file_mapping( + args: &[Object], + kw: &[(String, Object)], +) -> Result { + let file = handle_arg(args, 0, "CreateFileMapping")?; + let sec = sec_attr_ptr(pick(args, kw, 1, "security_attributes")); + let protect = int_arg(pick(args, kw, 2, "protect"), "CreateFileMapping", "protect")? as u32; + let max_high = int_arg( + pick(args, kw, 3, "maximum_size_high"), + "CreateFileMapping", + "maximum_size_high", + )? as u32; + let max_low = int_arg( + pick(args, kw, 4, "maximum_size_low"), + "CreateFileMapping", + "maximum_size_low", + )? as u32; + let name = opt_str_arg(pick(args, kw, 5, "name"), "CreateFileMapping", "name")?; + let name_w = name.as_deref().map(wide); + let h = unsafe { + mem::CreateFileMappingW( + file, + sec, + protect, + max_high, + max_low, + name_w.as_ref().map_or(std::ptr::null(), |v| v.as_ptr()), + ) + }; + if h.is_null() { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(handle_to_object(h as usize)) +} + +fn win_open_file_mapping(args: &[Object], kw: &[(String, Object)]) -> Result { + let access = int_arg( + pick(args, kw, 0, "desired_access"), + "OpenFileMapping", + "desired_access", + )? as u32; + let inherit = pick(args, kw, 1, "inherit_handle").is_some_and(Object::is_truthy); + let name = str_arg(pick(args, kw, 2, "name"), "OpenFileMapping", "name")?; + let name_w = wide(&name); + let h = unsafe { mem::OpenFileMappingW(access, i32::from(inherit), name_w.as_ptr()) }; + if h.is_null() { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(handle_to_object(h as usize)) +} + +fn win_map_view_of_file(args: &[Object], kw: &[(String, Object)]) -> Result { + let file = handle_arg(args, 0, "MapViewOfFile")?; + let access = int_arg( + pick(args, kw, 1, "desired_access"), + "MapViewOfFile", + "desired_access", + )? as u32; + let off_high = int_arg( + pick(args, kw, 2, "file_offset_high"), + "MapViewOfFile", + "file_offset_high", + )? as u32; + let off_low = int_arg( + pick(args, kw, 3, "file_offset_low"), + "MapViewOfFile", + "file_offset_low", + )? as u32; + let count = pick(args, kw, 4, "number_bytes") + .and_then(Object::as_i64) + .unwrap_or(0) as usize; + let view = unsafe { mem::MapViewOfFile(file, access, off_high, off_low, count) }; + if view.Value.is_null() { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(handle_to_object(view.Value as usize)) +} + +fn win_unmap_view_of_file( + args: &[Object], + _kw: &[(String, Object)], +) -> Result { + let addr = handle_arg(args, 0, "UnmapViewOfFile")?; + let view = mem::MEMORY_MAPPED_VIEW_ADDRESS { Value: addr.cast() }; + if unsafe { mem::UnmapViewOfFile(view) } == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::None) +} + +fn win_virtual_query_size( + args: &[Object], + _kw: &[(String, Object)], +) -> Result { + let addr = args + .first() + .and_then(obj_to_usize) + .ok_or_else(|| type_error("VirtualQuerySize: address must be an int"))?; + let mut info: mem::MEMORY_BASIC_INFORMATION = unsafe { std::mem::zeroed() }; + let written = unsafe { + mem::VirtualQuery( + addr as *const c_void, + &raw mut info, + std::mem::size_of::(), + ) + }; + if written == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::Int(info.RegionSize as i64)) +} + +// --------------------------------------------------------------------------- +// Process creation. +// --------------------------------------------------------------------------- + +/// Read one attribute off a Python object (the `STARTUPINFO` instance +/// `subprocess` passes), returning `None` when the attribute is absent +/// or `None`-valued. +fn get_attr_opt(obj: &Object, name: &str) -> Option { + let ptr = crate::vm_singletons::current_interpreter_ptr()?; + // SAFETY: the GIL is held throughout a builtin body, so the + // interpreter pointer is exclusively ours (same contract as + // `codecs_engine::get_attr`). + let interp = unsafe { &mut *ptr }; + match interp.load_attr_public(obj, name) { + Ok(Object::None) | Err(_) => None, + Ok(v) => Some(v), + } +} + +/// The double-NUL UTF-16 environment block CPython's +/// `getenvironment()` builds: `KEY=VALUE` entries sorted case-insensitively +/// by key, NUL-separated, with a trailing empty entry. +fn build_environment_block(env: &Object) -> Result, RuntimeError> { + let dict = match env { + Object::Dict(d) => d, + _ => return Err(type_error("environment must be a mapping or None")), + }; + let mut entries: Vec<(String, String)> = Vec::new(); + for (k, v) in dict.borrow().iter() { + let key = match &k.0 { + Object::Str(s) => s.to_string(), + _ => return Err(value_error("environment keys must be strings")), + }; + let val = match v { + Object::Str(s) => s.to_string(), + _ => return Err(value_error("environment values must be strings")), + }; + // CPython rejects an '=' inside a key (it would corrupt the block), + // except the leading-'=' "drive current directory" entries. + if key[1..].contains('=') { + return Err(value_error("illegal environment variable name")); + } + entries.push((key, val)); + } + entries.sort_by_key(|a| a.0.to_uppercase()); + let mut block: Vec = Vec::new(); + for (k, v) in entries { + block.extend(format!("{k}={v}").encode_utf16()); + block.push(0); + } + // An empty mapping still needs the block's own terminating NUL so the + // result is never a bare pointer to nothing. + block.push(0); + Ok(block) +} + +fn win_create_process(args: &[Object], kw: &[(String, Object)]) -> Result { + let app_name = opt_str_arg( + pick(args, kw, 0, "application_name"), + "CreateProcess", + "application_name", + )?; + let cmd_line = opt_str_arg( + pick(args, kw, 1, "command_line"), + "CreateProcess", + "command_line", + )?; + let proc_attrs = sec_attr_ptr(pick(args, kw, 2, "proc_attrs")); + let thread_attrs = sec_attr_ptr(pick(args, kw, 3, "thread_attrs")); + let inherit = pick(args, kw, 4, "inherit_handles").is_some_and(Object::is_truthy); + let flags = int_arg( + pick(args, kw, 5, "creation_flags"), + "CreateProcess", + "creation_flags", + )? as u32; + let env = pick(args, kw, 6, "env_mapping"); + let cwd = opt_str_arg( + pick(args, kw, 7, "current_directory"), + "CreateProcess", + "current_directory", + )?; + let startup_info = pick(args, kw, 8, "startup_info"); + + let app_w = app_name.as_deref().map(wide); + // CreateProcessW may write into the command-line buffer, so it must be + // a writable, NUL-terminated copy. + let mut cmd_w = cmd_line.as_deref().map(wide); + let cwd_w = cwd.as_deref().map(wide); + + // The environment block, when supplied, is CREATE_UNICODE_ENVIRONMENT. + let env_block = match env { + None | Some(Object::None) => None, + Some(e) => Some(build_environment_block(e)?), + }; + let creation_flags = flags | if env_block.is_some() { 0x0000_0400 } else { 0 }; // CREATE_UNICODE_ENVIRONMENT + + let mut si: thr::STARTUPINFOW = unsafe { std::mem::zeroed() }; + si.cb = std::mem::size_of::() as u32; + if let Some(sinfo) = startup_info { + if let Some(v) = get_attr_opt(sinfo, "dwFlags") + .as_ref() + .and_then(Object::as_i64) + { + si.dwFlags = v as u32; + } + if let Some(v) = get_attr_opt(sinfo, "wShowWindow") + .as_ref() + .and_then(Object::as_i64) + { + si.wShowWindow = v as u16; + } + if let Some(h) = get_attr_opt(sinfo, "hStdInput") + .as_ref() + .and_then(obj_to_usize) + { + si.hStdInput = h as HANDLE; + } + if let Some(h) = get_attr_opt(sinfo, "hStdOutput") + .as_ref() + .and_then(obj_to_usize) + { + si.hStdOutput = h as HANDLE; + } + if let Some(h) = get_attr_opt(sinfo, "hStdError") + .as_ref() + .and_then(obj_to_usize) + { + si.hStdError = h as HANDLE; + } + // `lpAttributeList={"handle_list": [...]}` restricts inheritance to + // the listed handles via a STARTUPINFOEX proc-thread attribute in + // CPython. WeavePy takes the pre-3.7 equivalent for now: mark each + // listed handle inheritable and rely on `bInheritHandles`. This + // inherits the same handles; it does not *restrict* inheritance to + // only them (the attribute-list isolation is deferred — it needs + // InitializeProcThreadAttributeList plumbing). + if let Some(attr) = get_attr_opt(sinfo, "lpAttributeList") { + if let Object::Dict(d) = &attr { + let hl = d + .borrow() + .get(&DictKey(Object::from_static("handle_list"))) + .cloned(); + if let Some(list) = hl.as_ref().and_then(extract_handle_seq) { + for h in list { + unsafe { + fnd::SetHandleInformation(h, 1 /* HANDLE_FLAG_INHERIT */, 1); + } + } + } + } + } + } + + let mut pi: thr::PROCESS_INFORMATION = unsafe { std::mem::zeroed() }; + let ok = unsafe { + thr::CreateProcessW( + app_w.as_ref().map_or(std::ptr::null(), |v| v.as_ptr()), + cmd_w + .as_mut() + .map_or(std::ptr::null_mut(), |v| v.as_mut_ptr()), + proc_attrs, + thread_attrs, + i32::from(inherit), + creation_flags, + env_block + .as_ref() + .map_or(std::ptr::null(), |v| v.as_ptr().cast::()), + cwd_w.as_ref().map_or(std::ptr::null(), |v| v.as_ptr()), + &raw const si, + &raw mut pi, + ) + }; + if ok == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::new_tuple(vec![ + handle_to_object(pi.hProcess as usize), + handle_to_object(pi.hThread as usize), + Object::Int(i64::from(pi.dwProcessId)), + Object::Int(i64::from(pi.dwThreadId)), + ])) +} + +// --------------------------------------------------------------------------- +// Reparse points, exe-path policy, file copy, locale mapping. +// --------------------------------------------------------------------------- + +const IO_REPARSE_TAG_MOUNT_POINT: u32 = 0xA000_0003; +const FSCTL_SET_REPARSE_POINT: u32 = 0x0009_00A4; +const FILE_FLAG_OPEN_REPARSE_POINT: u32 = 0x0020_0000; +const FILE_FLAG_BACKUP_SEMANTICS: u32 = 0x0200_0000; + +fn win_create_junction(args: &[Object], kw: &[(String, Object)]) -> Result { + let src = str_arg(pick(args, kw, 0, "src_path"), "CreateJunction", "src_path")?; + let dst = str_arg(pick(args, kw, 1, "dst_path"), "CreateJunction", "dst_path")?; + + // The reparse target must be an absolute NT path (`\??\` prefix), like + // CPython's `_winapi_CreateJunction_impl`. + let substitute: Vec = wide(&format!("\\??\\{src}")); + let subst_wo_nul = &substitute[..substitute.len() - 1]; + + // Create the empty directory that becomes the junction, then open it + // with backup semantics so the reparse write is permitted. + let dst_w = wide(&dst); + if unsafe { fs::CreateDirectoryW(dst_w.as_ptr(), std::ptr::null()) } == 0 { + return Err(nt_support::last_win32_error_to_py(Some(&dst))); + } + let junction = unsafe { + fs::CreateFileW( + dst_w.as_ptr(), + fnd::GENERIC_WRITE, + 0, + std::ptr::null(), + fs::OPEN_EXISTING, + FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS, + std::ptr::null_mut(), + ) + }; + if junction == fnd::INVALID_HANDLE_VALUE { + return Err(nt_support::last_win32_error_to_py(Some(&dst))); + } + + // REPARSE_DATA_BUFFER (mount-point form). The path buffer holds the + // substitute name (NUL-terminated) followed by an empty print name. + let subst_bytes = subst_wo_nul.len() * 2; + let path_buffer_len = subst_bytes + 2 /* subst NUL */ + 2 /* empty print name NUL */; + let reparse_data_length = 8 /* the four WORD offset/length fields */ + path_buffer_len; + let mut buf: Vec = Vec::with_capacity(8 + reparse_data_length); + buf.extend_from_slice(&IO_REPARSE_TAG_MOUNT_POINT.to_le_bytes()); + buf.extend_from_slice(&(reparse_data_length as u16).to_le_bytes()); + buf.extend_from_slice(&0u16.to_le_bytes()); // Reserved + buf.extend_from_slice(&0u16.to_le_bytes()); // SubstituteNameOffset + buf.extend_from_slice(&(subst_bytes as u16).to_le_bytes()); // SubstituteNameLength + buf.extend_from_slice(&((subst_bytes + 2) as u16).to_le_bytes()); // PrintNameOffset + buf.extend_from_slice(&0u16.to_le_bytes()); // PrintNameLength (empty) + for &wc in subst_wo_nul { + buf.extend_from_slice(&wc.to_le_bytes()); + } + buf.extend_from_slice(&0u16.to_le_bytes()); // substitute NUL + buf.extend_from_slice(&0u16.to_le_bytes()); // empty print name NUL + + let mut returned: u32 = 0; + let ok = unsafe { + wio::DeviceIoControl( + junction, + FSCTL_SET_REPARSE_POINT, + buf.as_ptr().cast::(), + buf.len() as u32, + std::ptr::null_mut(), + 0, + &raw mut returned, + std::ptr::null_mut(), + ) + }; + let err = if ok != 0 { + None + } else { + Some(nt_support::last_win32_error_to_py(Some(&dst))) + }; + unsafe { + fnd::CloseHandle(junction); + } + if let Some(e) = err { + return Err(e); + } + Ok(Object::None) +} + +fn win_need_cwd_for_exe_path( + args: &[Object], + kw: &[(String, Object)], +) -> Result { + let exe = str_arg( + pick(args, kw, 0, "exe_name"), + "NeedCurrentDirectoryForExePath", + "exe_name", + )?; + let exe_w = wide(&exe); + let need = unsafe { + windows_sys::Win32::System::Environment::NeedCurrentDirectoryForExePathW(exe_w.as_ptr()) + }; + Ok(Object::Bool(need != 0)) +} + +fn win_copy_file2(args: &[Object], kw: &[(String, Object)]) -> Result { + let src = str_arg( + pick(args, kw, 0, "existing_file_name"), + "CopyFile2", + "existing_file_name", + )?; + let dst = str_arg( + pick(args, kw, 1, "new_file_name"), + "CopyFile2", + "new_file_name", + )?; + // `flags` here is the `COPYFILE2_EXTENDED_PARAMETERS.dwCopyFlags` set; + // `progress_routine` is accepted for signature parity and unused (the + // callback bridge is deferred). We implement over CopyFileExW, whose + // dwCopyFlags space is the same COPY_FILE_* bits shutil passes. + let flags = pick(args, kw, 2, "flags") + .and_then(Object::as_i64) + .unwrap_or(0) as u32; + let _progress = pick(args, kw, 3, "progress_routine"); + let src_w = wide(&src); + let dst_w = wide(&dst); + let ok = crate::gil::allow_threads_then(|| unsafe { + fs::CopyFileExW( + src_w.as_ptr(), + dst_w.as_ptr(), + None, + std::ptr::null(), + std::ptr::null_mut(), + flags, + ) + }); + if ok == 0 { + return Err(nt_support::last_win32_error_to_py(Some(&src))); + } + // CPython's `_winapi.CopyFile2` returns S_OK (0). + Ok(Object::Int(0)) +} + +fn win_lcmapstring_ex(args: &[Object], kw: &[(String, Object)]) -> Result { + // locale=None → user-default (NULL); the empty string is the invariant + // locale, which LCMapStringEx accepts directly. + let locale = opt_str_arg( + pick(args, kw, 0, "locale_name"), + "LCMapStringEx", + "locale_name", + )?; + let flags = int_arg(pick(args, kw, 1, "map_flags"), "LCMapStringEx", "map_flags")? as u32; + let src = str_arg(pick(args, kw, 2, "src"), "LCMapStringEx", "src")?; + let locale_w = locale.as_deref().map(wide); + let locale_ptr = locale_w.as_ref().map_or(std::ptr::null(), |v| v.as_ptr()); + let src_w: Vec = src.encode_utf16().collect(); + let src_len = src_w.len() as i32; + + let needed = unsafe { + glob::LCMapStringEx( + locale_ptr, + flags, + src_w.as_ptr(), + src_len, + std::ptr::null_mut(), + 0, + std::ptr::null(), + std::ptr::null(), + 0, + ) + }; + if needed <= 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + let mut out = vec![0u16; needed as usize]; + let written = unsafe { + glob::LCMapStringEx( + locale_ptr, + flags, + src_w.as_ptr(), + src_len, + out.as_mut_ptr(), + needed, + std::ptr::null(), + std::ptr::null(), + 0, + ) + }; + if written <= 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + Ok(Object::from_str(nt_support::from_wide( + &out[..written as usize], + ))) +} + +// --------------------------------------------------------------------------- +// The `Overlapped` helper type. +// --------------------------------------------------------------------------- +// +// CPython's `_winapi.Overlapped` pins its OVERLAPPED, its owned event, +// and (for reads/writes) its buffer until the async op completes or is +// cancelled — the VM must never free memory the kernel still owns. We +// keep that state in a process-global registry keyed by an opaque id +// carried on the instance, mirroring `select.poll`'s handle scheme. All +// fields are integers/`Vec`, so the registry is `Send` even though a raw +// `HANDLE` is not; pointers are reconstituted at use. + +struct OverlappedState { + /// Owned `*mut OVERLAPPED` (`Box::into_raw`); freed on drop. + ov: usize, + /// Owned manual-reset event; `CloseHandle`d on drop. + event: usize, + /// The file/pipe handle the op runs on (borrowed, not owned). + handle: usize, + /// The pinned I/O buffer: the read target (resized to the transferred + /// count on completion) or the write source (kept alive). + buffer: Option>, + is_write: bool, + pending: bool, + completed: bool, +} + +fn overlapped_registry() -> &'static Mutex> { + static R: std::sync::OnceLock>> = + std::sync::OnceLock::new(); + R.get_or_init(|| Mutex::new(HashMap::new())) +} + +static NEXT_OVERLAPPED_ID: AtomicI64 = AtomicI64::new(1); + +thread_local! { + static OVERLAPPED_CLASS: RefCell>> = + const { RefCell::new(None) }; +} + +/// A live handle to a registry entry, used only during construction of +/// an op before it is turned into (or discarded instead of) an instance. +struct OverlappedObject { + id: i64, + event: usize, +} + +impl OverlappedObject { + fn new(handle: HANDLE, is_write: bool, buffer: Option>) -> Self { + // Manual-reset, non-signaled, unnamed — CPython's overlapped event. + let event = unsafe { thr::CreateEventW(std::ptr::null(), 1, 0, std::ptr::null()) }; + let ov = Box::new(wio::OVERLAPPED { + hEvent: event, + ..unsafe { std::mem::zeroed() } + }); + let ovp = Box::into_raw(ov); + let id = NEXT_OVERLAPPED_ID.fetch_add(1, Ordering::Relaxed); + overlapped_registry().lock().unwrap().insert( + id, + OverlappedState { + ov: ovp as usize, + event: event as usize, + handle: handle as usize, + buffer, + is_write, + pending: false, + completed: false, + }, + ); + OverlappedObject { + id, + event: event as usize, + } + } + + fn overlapped_ptr(&self) -> *mut wio::OVERLAPPED { + overlapped_registry().lock().unwrap()[&self.id].ov as *mut wio::OVERLAPPED + } + + /// The pinned buffer's `(ptr, len)` — the heap allocation is stable + /// across registry rehashes, so the kernel-visible pointer stays valid. + fn buffer_ptr_len(&self) -> (*mut u8, usize) { + let mut reg = overlapped_registry().lock().unwrap(); + let st = reg.get_mut(&self.id).unwrap(); + let b = st.buffer.as_mut().expect("overlapped op has a buffer"); + (b.as_mut_ptr(), b.len()) + } + + fn set_pending(&self, pending: bool) { + let mut reg = overlapped_registry().lock().unwrap(); + let st = reg.get_mut(&self.id).unwrap(); + st.pending = pending; + st.completed = !pending; + } + + /// The op could not be issued; free the entry (and its OVERLAPPED + + /// event) without ever handing out an instance. + fn discard(self) { + if let Some(st) = overlapped_registry().lock().unwrap().remove(&self.id) { + free_overlapped_state(st); + } + } + + fn into_object(self) -> Object { + let inst = Rc::new(crate::types::PyInstance::new(overlapped_type())); + { + let mut d = inst.dict.borrow_mut(); + d.insert(DictKey(Object::from_static("_id")), Object::Int(self.id)); + // `.event` is a plain attribute here (CPython exposes it as a + // read-only getset; the consumers only read it). + d.insert( + DictKey(Object::from_static("event")), + handle_to_object(self.event), + ); + } + Object::Instance(inst) + } +} + +/// Free an OVERLAPPED box + owned event. The caller must have already +/// ensured the kernel is done with them (op not pending, or drained). +fn free_overlapped_state(st: OverlappedState) { + unsafe { + drop(Box::from_raw(st.ov as *mut wio::OVERLAPPED)); + fnd::CloseHandle(st.event as HANDLE); + } +} + +fn overlapped_method( + name: &'static str, + body: fn(&[Object]) -> Result, +) -> Object { + Object::Builtin(Rc::new(BuiltinFn { + name, + binds_instance: true, + call: Box::new(body), + call_kw: None, + })) +} + +fn overlapped_type() -> Rc { + OVERLAPPED_CLASS.with(|slot| { + if let Some(c) = slot.borrow().as_ref() { + return c.clone(); + } + let bt = crate::builtin_types::builtin_types(); + let mut dict = DictData::default(); + for (name, m) in [ + ( + "GetOverlappedResult", + overlapped_method("GetOverlappedResult", overlapped_get_result), + ), + ( + "getbuffer", + overlapped_method("getbuffer", overlapped_getbuffer), + ), + ("cancel", overlapped_method("cancel", overlapped_cancel)), + ("__del__", overlapped_method("__del__", overlapped_del)), + ] { + dict.insert(DictKey(Object::from_static(name)), m); + } + dict.insert( + DictKey(Object::from_static("__module__")), + Object::from_static("_winapi"), + ); + let cls = crate::types::TypeObject::new_user("Overlapped", vec![bt.object_.clone()], dict) + .expect("Overlapped class must linearise"); + *slot.borrow_mut() = Some(cls.clone()); + cls + }) +} + +fn overlapped_id(args: &[Object]) -> Result { + match args.first() { + Some(Object::Instance(i)) => { + match i.dict.borrow().get(&DictKey(Object::from_static("_id"))) { + Some(Object::Int(id)) => Ok(*id), + _ => Err(value_error("Overlapped object is closed")), + } + } + _ => Err(type_error("descriptor requires an 'Overlapped' object")), + } +} + +fn overlapped_get_result(args: &[Object]) -> Result { + let id = overlapped_id(args)?; + let wait = args.get(1).is_some_and(Object::is_truthy); + let (handle, ovp) = { + let reg = overlapped_registry().lock().unwrap(); + let st = reg + .get(&id) + .ok_or_else(|| value_error("Overlapped object is closed"))?; + (st.handle as HANDLE, st.ov as *const wio::OVERLAPPED) + }; + let mut transferred: u32 = 0; + let res = if wait { + crate::gil::allow_threads_then(|| unsafe { + wio::GetOverlappedResult(handle, ovp, &raw mut transferred, 1) + }) + } else { + unsafe { wio::GetOverlappedResult(handle, ovp, &raw mut transferred, 0) } + }; + let err = if res != 0 { + ERROR_SUCCESS + } else { + unsafe { fnd::GetLastError() } + }; + match err { + ERROR_SUCCESS | ERROR_MORE_DATA | ERROR_OPERATION_ABORTED => { + let mut reg = overlapped_registry().lock().unwrap(); + if let Some(st) = reg.get_mut(&id) { + st.completed = true; + st.pending = false; + // For a completed read, the buffer shrinks to the count the + // kernel actually delivered (CPython `_PyBytes_Resize`). + if !st.is_write { + if let Some(b) = st.buffer.as_mut() { + b.truncate(transferred as usize); + } + } + } + } + ERROR_IO_INCOMPLETE => {} + _ => { + if let Some(st) = overlapped_registry().lock().unwrap().get_mut(&id) { + st.pending = false; + } + return Err(nt_support::win32_error_to_py(err as i32, None)); + } + } + Ok(Object::new_tuple(vec![ + Object::Int(i64::from(transferred)), + Object::Int(i64::from(err)), + ])) +} + +fn overlapped_getbuffer(args: &[Object]) -> Result { + let id = overlapped_id(args)?; + let reg = overlapped_registry().lock().unwrap(); + let st = reg + .get(&id) + .ok_or_else(|| value_error("Overlapped object is closed"))?; + // Only meaningful after a completed read; None otherwise (CPython). + match (&st.buffer, st.is_write, st.completed) { + (Some(b), false, true) => Ok(Object::new_bytes(b.clone())), + _ => Ok(Object::None), + } +} + +fn overlapped_cancel(args: &[Object]) -> Result { + let id = overlapped_id(args)?; + let mut reg = overlapped_registry().lock().unwrap(); + if let Some(st) = reg.get_mut(&id) { + if st.pending && !st.completed { + // ERROR_NOT_FOUND means the op already finished — not an error. + let ok = + unsafe { wio::CancelIoEx(st.handle as HANDLE, st.ov as *const wio::OVERLAPPED) }; + if ok == 0 { + let err = unsafe { fnd::GetLastError() }; + if err != ERROR_NOT_FOUND { + return Err(nt_support::win32_error_to_py(err as i32, None)); + } + } + } + } + Ok(Object::None) +} + +fn overlapped_del(args: &[Object]) -> Result { + let id = match overlapped_id(args) { + Ok(id) => id, + Err(_) => return Ok(Object::None), + }; + let st = overlapped_registry().lock().unwrap().remove(&id); + if let Some(st) = st { + // A still-pending op owns a buffer the kernel may write to; cancel + // and drain to completion before freeing, so we never release + // kernel-owned memory (CPython's dealloc does the same wait). + if st.pending && !st.completed { + unsafe { + wio::CancelIoEx(st.handle as HANDLE, st.ov as *const wio::OVERLAPPED); + thr::WaitForSingleObject(st.event as HANDLE, INFINITE); + } + } + free_overlapped_state(st); + } + Ok(Object::None) +} + +// --------------------------------------------------------------------------- +// Constant table (winbase.h / winnt.h / handleapi.h values). Published as +// plain module ints — CPython's `_winapi` exposes exactly these. +// --------------------------------------------------------------------------- + +fn constants() -> Vec<(&'static str, i64)> { + vec![ + // Process priority classes. + ("ABOVE_NORMAL_PRIORITY_CLASS", 0x0000_8000), + ("BELOW_NORMAL_PRIORITY_CLASS", 0x0000_4000), + ("HIGH_PRIORITY_CLASS", 0x0000_0080), + ("IDLE_PRIORITY_CLASS", 0x0000_0040), + ("NORMAL_PRIORITY_CLASS", 0x0000_0020), + ("REALTIME_PRIORITY_CLASS", 0x0000_0100), + // Creation flags. + ("CREATE_BREAKAWAY_FROM_JOB", 0x0100_0000), + ("CREATE_DEFAULT_ERROR_MODE", 0x0400_0000), + ("CREATE_NO_WINDOW", 0x0800_0000), + ("CREATE_NEW_CONSOLE", 0x0000_0010), + ("CREATE_NEW_PROCESS_GROUP", 0x0000_0200), + ("CREATE_UNICODE_ENVIRONMENT", 0x0000_0400), + ("DETACHED_PROCESS", 0x0000_0008), + ("STARTF_USESHOWWINDOW", 0x0000_0001), + ("STARTF_USESTDHANDLES", 0x0000_0100), + ("STARTF_FORCEONFEEDBACK", 0x0000_0040), + ("STARTF_FORCEOFFFEEDBACK", 0x0000_0080), + // Handle duplication. + ("DUPLICATE_CLOSE_SOURCE", 0x0000_0001), + ("DUPLICATE_SAME_ACCESS", 0x0000_0002), + // Win32 error codes. + ("ERROR_ACCESS_DENIED", 5), + ("ERROR_ALREADY_EXISTS", 183), + ("ERROR_BROKEN_PIPE", 109), + ("ERROR_IO_PENDING", 997), + ("ERROR_MORE_DATA", 234), + ("ERROR_NETNAME_DELETED", 64), + ("ERROR_NO_DATA", 232), + ("ERROR_NO_SYSTEM_RESOURCES", 1450), + ("ERROR_OPERATION_ABORTED", 995), + ("ERROR_PIPE_BUSY", 231), + ("ERROR_PIPE_CONNECTED", 535), + ("ERROR_PRIVILEGE_NOT_HELD", 1314), + ("ERROR_SEM_TIMEOUT", 121), + // File flags and access. + ("FILE_FLAG_FIRST_PIPE_INSTANCE", 0x0008_0000), + ("FILE_FLAG_OVERLAPPED", 0x4000_0000), + ("FILE_GENERIC_READ", 0x0012_0089), + ("FILE_GENERIC_WRITE", 0x0012_0116), + ("FILE_MAP_ALL_ACCESS", 0x000F_001F), + ("FILE_MAP_COPY", 0x0000_0001), + ("FILE_MAP_EXECUTE", 0x0000_0020), + ("FILE_MAP_READ", 0x0000_0004), + ("FILE_MAP_WRITE", 0x0000_0002), + ("FILE_TYPE_CHAR", 0x0002), + ("FILE_TYPE_DISK", 0x0001), + ("FILE_TYPE_PIPE", 0x0003), + ("FILE_TYPE_REMOTE", 0x8000), + ("FILE_TYPE_UNKNOWN", 0x0000), + ("GENERIC_READ", 0x8000_0000), + ("GENERIC_WRITE", 0x4000_0000), + ("INFINITE", 0xFFFF_FFFF), + // Memory / section flags. + ("MEM_COMMIT", 0x0000_1000), + ("MEM_FREE", 0x0001_0000), + ("MEM_IMAGE", 0x0100_0000), + ("MEM_MAPPED", 0x0004_0000), + ("MEM_PRIVATE", 0x0002_0000), + ("MEM_RESERVE", 0x0000_2000), + ("NMPWAIT_WAIT_FOREVER", 0xFFFF_FFFF), + ("NULL", 0), + ("OPEN_EXISTING", 3), + ("PAGE_NOACCESS", 0x01), + ("PAGE_READONLY", 0x02), + ("PAGE_READWRITE", 0x04), + ("PAGE_WRITECOPY", 0x08), + ("PAGE_EXECUTE", 0x10), + ("PAGE_EXECUTE_READ", 0x20), + ("PAGE_EXECUTE_READWRITE", 0x40), + ("PAGE_EXECUTE_WRITECOPY", 0x80), + ("PAGE_GUARD", 0x100), + ("PAGE_NOCACHE", 0x200), + ("PAGE_WRITECOMBINE", 0x400), + // Named-pipe modes. + ("PIPE_ACCESS_DUPLEX", 0x0000_0003), + ("PIPE_ACCESS_INBOUND", 0x0000_0001), + ("PIPE_ACCESS_OUTBOUND", 0x0000_0002), + ("PIPE_READMODE_BYTE", 0x0000_0000), + ("PIPE_READMODE_MESSAGE", 0x0000_0002), + ("PIPE_TYPE_BYTE", 0x0000_0000), + ("PIPE_TYPE_MESSAGE", 0x0000_0004), + ("PIPE_UNLIMITED_INSTANCES", 255), + ("PIPE_WAIT", 0x0000_0000), + ("PIPE_NOWAIT", 0x0000_0001), + // Process access rights. + ("PROCESS_ALL_ACCESS", 0x001F_FFFF), + ("PROCESS_DUP_HANDLE", 0x0040), + // Section attributes. + ("SEC_COMMIT", 0x0800_0000), + ("SEC_IMAGE", 0x0100_0000), + ("SEC_IMAGE_NO_EXECUTE", 0x1100_0000), + ("SEC_LARGE_PAGES", 0x8000_0000), + ("SEC_NOCACHE", 0x1000_0000), + ("SEC_RESERVE", 0x0400_0000), + ("SEC_WRITECOMBINE", 0x4000_0000), + // Standard-handle selectors (unsigned DWORDs). + ("STD_ERROR_HANDLE", 0xFFFF_FFF4), + ("STD_INPUT_HANDLE", 0xFFFF_FFF6), + ("STD_OUTPUT_HANDLE", 0xFFFF_FFF5), + ("STILL_ACTIVE", 259), + ("SW_HIDE", 0), + ("SYNCHRONIZE", 0x0010_0000), + ("WAIT_ABANDONED_0", 128), + ("WAIT_OBJECT_0", 0), + ("WAIT_TIMEOUT", 258), + ("WAIT_FAILED", 0xFFFF_FFFF), + // LCMapStringEx flags. + ("LCMAP_FULLWIDTH", 0x0080_0000), + ("LCMAP_HALFWIDTH", 0x0040_0000), + ("LCMAP_HIRAGANA", 0x0010_0000), + ("LCMAP_KATAKANA", 0x0020_0000), + ("LCMAP_LINGUISTIC_CASING", 0x0100_0000), + ("LCMAP_LOWERCASE", 0x0000_0100), + ("LCMAP_SIMPLIFIED_CHINESE", 0x0200_0000), + ("LCMAP_TITLECASE", 0x0000_0300), + ("LCMAP_TRADITIONAL_CHINESE", 0x0400_0000), + ("LCMAP_UPPERCASE", 0x0000_0200), + ("LOCALE_NAME_MAX_LENGTH", 85), + // COPY_FILE_* flags shutil's fast-copy path passes to CopyFile2. + ("COPY_FILE_ALLOW_DECRYPTED_DESTINATION", 0x0000_0008), + ("COPY_FILE_COPY_SYMLINK", 0x0000_0800), + ("COPY_FILE_DIRECTORY", 0x0000_0080), + ("COPY_FILE_FAIL_IF_EXISTS", 0x0000_0001), + ("COPY_FILE_NO_BUFFERING", 0x0000_1000), + ("COPY_FILE_NO_OFFLOAD", 0x0004_0000), + ("COPY_FILE_OPEN_SOURCE_FOR_WRITE", 0x0000_0004), + ("COPY_FILE_REQUEST_COMPRESSED_TRAFFIC", 0x1000_0000), + ("COPY_FILE_REQUEST_SECURITY_PRIVILEGES", 0x0000_2000), + ("COPY_FILE_RESTARTABLE", 0x0000_0002), + ("COPY_FILE_RESUME_FROM_PAUSE", 0x0000_4000), + ] +} diff --git a/crates/weavepy-vm/src/stdlib/winreg_mod.rs b/crates/weavepy-vm/src/stdlib/winreg_mod.rs new file mode 100644 index 00000000..c9de3aa3 --- /dev/null +++ b/crates/weavepy-vm/src/stdlib/winreg_mod.rs @@ -0,0 +1,1410 @@ +//! The `winreg` built-in module (RFC 0063 WS3) — the Windows registry +//! surface, a faithful transcription of CPython's `PC/winreg.c`. +//! +//! Three layers, mirroring the C module's structure: +//! +//! 1. **The `PyHKEY` handle type** — a context-manager wrapper around +//! a raw `HKEY` with `Close()`/`Detach()`, truthiness (`False` +//! once closed), and int conversion. Every function that takes a +//! key accepts *either* a `PyHKEY` or a plain int (CPython's +//! `PyHKEY_AsHKEY` contract), and every function that opens a key +//! returns a `PyHKEY`, so keys close deterministically under +//! `with` and leak-close at GC time otherwise. +//! 2. **Value marshalling** — [`reg_to_py`]/[`py_to_reg`] transcribe +//! `Reg2Py`/`Py2Reg`: `REG_SZ`/`REG_EXPAND_SZ` ↔ `str` (raw +//! UTF-16, so PEP-383 lone surrogates round-trip through the +//! WStr arc), `REG_MULTI_SZ` ↔ `list[str]` (double-NUL block), +//! `REG_DWORD`/`REG_QWORD` ↔ unsigned ints, and everything else +//! (`REG_BINARY` included) ↔ `bytes` (`None` when empty). +//! 3. **The function surface** — the full CPython 3.13 inventory +//! from `OpenKey` to `QueryReflectionKey`, plus the `HKEY_*` / +//! `KEY_*` / `REG_*` constant families. +//! +//! Error model: the `Reg*` APIs return the Win32 error code directly +//! (an `LSTATUS`, no `GetLastError` round-trip), so every nonzero +//! status feeds [`nt_support::win32_error_to_py`] verbatim — the +//! resulting `OSError` carries `.winerror`, the errmap-translated +//! `.errno` (`ERROR_FILE_NOT_FOUND` → `ENOENT` → `FileNotFoundError`), +//! and the `FormatMessageW` text, exactly like +//! `PyErr_SetFromWindowsErrWithFunction`. +//! +//! Every registry call runs with the GIL released +//! (`Py_BEGIN_ALLOW_THREADS` in CPython): against a remote registry +//! (`ConnectRegistry`) or a hive on slow storage these are real +//! blocking I/O. + +use crate::sync::Rc; +use crate::sync::RefCell; + +use num_traits::ToPrimitive; +use windows_sys::Win32::Foundation::{ + ERROR_FILE_NOT_FOUND, ERROR_INVALID_DATA, ERROR_MORE_DATA, ERROR_SUCCESS, FILETIME, +}; +use windows_sys::Win32::System::Environment::ExpandEnvironmentStringsW; +use windows_sys::Win32::System::Registry as reg; + +use crate::error::{overflow_error, type_error, value_error, RuntimeError}; +use crate::import::ModuleCache; +use crate::object::{BuiltinFn, DictData, DictKey, Object, PyModule}; +use crate::stdlib::nt_support; +use crate::stdlib::os::{builtin, builtin_kw}; +use crate::types::{PyInstance, TypeObject}; + +// --------------------------------------------------------------------------- +// Constants windows-sys does not export (winnt.h composites). +// --------------------------------------------------------------------------- + +/// `winnt.h REG_LEGAL_CHANGE_FILTER` — the OR of every +/// `REG_NOTIFY_CHANGE_*` bit plus `REG_NOTIFY_THREAD_AGNOSTIC` +/// (0x1000_0000), which is what modern SDKs (and hence CPython's +/// compiled constant) include. +const REG_LEGAL_CHANGE_FILTER: u32 = 0x1000_000F; + +/// `winnt.h REG_LEGAL_OPTION` — the OR of every `REG_OPTION_*` bit +/// including `REG_OPTION_DONT_VIRTUALIZE` (0x10) per modern SDKs. +const REG_LEGAL_OPTION: u32 = 0x1F; + +/// `winnt.h` hive-load flags (`RegRestoreKey`/`RegReplaceKey` family). +const REG_NO_LAZY_FLUSH: u32 = 0x4; +const REG_REFRESH_HIVE: u32 = 0x2; + +/// `winnt.h MAXIMUM_ALLOWED`. `PC/winreg.c`'s `CreateKey` uses the +/// legacy `RegCreateKeyW`, whose documented `RegCreateKeyExW` +/// equivalent requests this access mask — the returned handle must be +/// usable for both writing values and enumerating, which no single +/// `KEY_*` composite grants. +const MAXIMUM_ALLOWED: u32 = 0x0200_0000; + +// --------------------------------------------------------------------------- +// Module construction +// --------------------------------------------------------------------------- + +pub fn build(_cache: &ModuleCache) -> Rc { + let dict = Rc::new(RefCell::new(DictData::default())); + { + let mut d = dict.borrow_mut(); + d.insert( + DictKey(Object::from_static("__name__")), + Object::from_static("winreg"), + ); + d.insert( + DictKey(Object::from_static("__doc__")), + Object::from_static("This module provides access to the Windows registry API."), + ); + + // `winreg.error` is OSError (PC/winreg.c inserts PyExc_OSError). + d.insert( + DictKey(Object::from_static("error")), + Object::Type(crate::builtin_types::builtin_types().os_error.clone()), + ); + // The handle type is exposed for isinstance checks + // (`winreg.HKEYType`, like CPython's PyHKEY_Type insertion). + d.insert( + DictKey(Object::from_static("HKEYType")), + Object::Type(hkey_type()), + ); + + // The predefined root keys. The SDK's HKEY_* macros are + // sign-extended pseudo-handles on 64-bit + // (0xFFFFFFFF_80000001, …); CPython documents and tests the + // *unsigned 32-bit* face (HKEY_CURRENT_USER == 0x80000001 == + // 2147483649), so truncate back to that before publishing. + // [`hkey_from_i128`] re-extends on the way into the API. + for (name, v) in [ + ("HKEY_CLASSES_ROOT", reg::HKEY_CLASSES_ROOT as usize as u32), + ("HKEY_CURRENT_USER", reg::HKEY_CURRENT_USER as usize as u32), + ( + "HKEY_LOCAL_MACHINE", + reg::HKEY_LOCAL_MACHINE as usize as u32, + ), + ("HKEY_USERS", reg::HKEY_USERS as usize as u32), + ( + "HKEY_PERFORMANCE_DATA", + reg::HKEY_PERFORMANCE_DATA as usize as u32, + ), + ( + "HKEY_CURRENT_CONFIG", + reg::HKEY_CURRENT_CONFIG as usize as u32, + ), + ("HKEY_DYN_DATA", reg::HKEY_DYN_DATA as usize as u32), + ] { + d.insert( + DictKey(Object::from_static(name)), + Object::Int(i64::from(v)), + ); + } + + // Access rights, value types, and the option/notify/hive-load + // families — PC/winreg.c's ADD_INT inventory, values straight + // from windows-sys (= the SDK) so the masks round-trip through + // the real API. + for (name, v) in [ + // KEY_* access rights. + ("KEY_ALL_ACCESS", reg::KEY_ALL_ACCESS), + ("KEY_WRITE", reg::KEY_WRITE), + ("KEY_READ", reg::KEY_READ), + ("KEY_EXECUTE", reg::KEY_EXECUTE), + ("KEY_QUERY_VALUE", reg::KEY_QUERY_VALUE), + ("KEY_SET_VALUE", reg::KEY_SET_VALUE), + ("KEY_CREATE_SUB_KEY", reg::KEY_CREATE_SUB_KEY), + ("KEY_ENUMERATE_SUB_KEYS", reg::KEY_ENUMERATE_SUB_KEYS), + ("KEY_NOTIFY", reg::KEY_NOTIFY), + ("KEY_CREATE_LINK", reg::KEY_CREATE_LINK), + ("KEY_WOW64_64KEY", reg::KEY_WOW64_64KEY), + ("KEY_WOW64_32KEY", reg::KEY_WOW64_32KEY), + // REG_* value types. + ("REG_NONE", reg::REG_NONE), + ("REG_SZ", reg::REG_SZ), + ("REG_EXPAND_SZ", reg::REG_EXPAND_SZ), + ("REG_BINARY", reg::REG_BINARY), + ("REG_DWORD", reg::REG_DWORD), + ("REG_DWORD_LITTLE_ENDIAN", reg::REG_DWORD_LITTLE_ENDIAN), + ("REG_DWORD_BIG_ENDIAN", reg::REG_DWORD_BIG_ENDIAN), + ("REG_LINK", reg::REG_LINK), + ("REG_MULTI_SZ", reg::REG_MULTI_SZ), + ("REG_RESOURCE_LIST", reg::REG_RESOURCE_LIST), + ( + "REG_FULL_RESOURCE_DESCRIPTOR", + reg::REG_FULL_RESOURCE_DESCRIPTOR, + ), + ( + "REG_RESOURCE_REQUIREMENTS_LIST", + reg::REG_RESOURCE_REQUIREMENTS_LIST, + ), + ("REG_QWORD", reg::REG_QWORD), + ("REG_QWORD_LITTLE_ENDIAN", reg::REG_QWORD_LITTLE_ENDIAN), + // CreateKeyEx dispositions. + ("REG_CREATED_NEW_KEY", reg::REG_CREATED_NEW_KEY), + ("REG_OPENED_EXISTING_KEY", reg::REG_OPENED_EXISTING_KEY), + // Notify filters. + ("REG_NOTIFY_CHANGE_NAME", reg::REG_NOTIFY_CHANGE_NAME), + ( + "REG_NOTIFY_CHANGE_ATTRIBUTES", + reg::REG_NOTIFY_CHANGE_ATTRIBUTES, + ), + ( + "REG_NOTIFY_CHANGE_LAST_SET", + reg::REG_NOTIFY_CHANGE_LAST_SET, + ), + ( + "REG_NOTIFY_CHANGE_SECURITY", + reg::REG_NOTIFY_CHANGE_SECURITY, + ), + ("REG_LEGAL_CHANGE_FILTER", REG_LEGAL_CHANGE_FILTER), + // Open/create options. + ("REG_OPTION_RESERVED", reg::REG_OPTION_RESERVED), + ("REG_OPTION_NON_VOLATILE", reg::REG_OPTION_NON_VOLATILE), + ("REG_OPTION_VOLATILE", reg::REG_OPTION_VOLATILE), + ("REG_OPTION_CREATE_LINK", reg::REG_OPTION_CREATE_LINK), + ("REG_OPTION_BACKUP_RESTORE", reg::REG_OPTION_BACKUP_RESTORE), + ("REG_OPTION_OPEN_LINK", reg::REG_OPTION_OPEN_LINK), + ("REG_LEGAL_OPTION", REG_LEGAL_OPTION), + // Hive-load flags. + ("REG_NO_LAZY_FLUSH", REG_NO_LAZY_FLUSH), + ("REG_REFRESH_HIVE", REG_REFRESH_HIVE), + ( + "REG_WHOLE_HIVE_VOLATILE", + reg::REG_WHOLE_HIVE_VOLATILE as u32, + ), + ] { + d.insert( + DictKey(Object::from_static(name)), + Object::Int(i64::from(v)), + ); + } + + for (name, f) in [ + ("CloseKey", winreg_close_key as fn(&[Object]) -> _), + ("ConnectRegistry", winreg_connect_registry), + ("CreateKey", winreg_create_key), + ("DeleteKey", winreg_delete_key), + ("DeleteValue", winreg_delete_value), + ("DisableReflectionKey", winreg_disable_reflection_key), + ("EnableReflectionKey", winreg_enable_reflection_key), + ("QueryReflectionKey", winreg_query_reflection_key), + ("EnumKey", winreg_enum_key), + ("EnumValue", winreg_enum_value), + ( + "ExpandEnvironmentStrings", + winreg_expand_environment_strings, + ), + ("FlushKey", winreg_flush_key), + ("LoadKey", winreg_load_key), + ("QueryInfoKey", winreg_query_info_key), + ("QueryValue", winreg_query_value), + ("QueryValueEx", winreg_query_value_ex), + ("SaveKey", winreg_save_key), + ("SetValue", winreg_set_value), + ("SetValueEx", winreg_set_value_ex), + ] { + d.insert(DictKey(Object::from_static(name)), builtin(name, f)); + } + // The keyword-accepting quartet (argument clinic exposes + // `reserved=`/`access=` by name on exactly these four). + for (name, f) in [ + ( + "CreateKeyEx", + winreg_create_key_ex as fn(&[Object], &[(String, Object)]) -> _, + ), + ("DeleteKeyEx", winreg_delete_key_ex), + ("OpenKey", winreg_open_key), + ("OpenKeyEx", winreg_open_key), + ] { + d.insert(DictKey(Object::from_static(name)), builtin_kw(name, f)); + } + } + Rc::new(PyModule { + name: "winreg".to_owned(), + filename: None, + dict, + }) +} + +// --------------------------------------------------------------------------- +// Small shared plumbing +// --------------------------------------------------------------------------- + +/// A bound method for the `PyHKEY` type dict (poll-object pattern). +fn method(name: &'static str, body: fn(&[Object]) -> Result) -> Object { + Object::Builtin(Rc::new(BuiltinFn { + name, + binds_instance: true, + call: Box::new(body), + call_kw: None, + })) +} + +/// Run one registry call with the GIL released — CPython brackets +/// every `Reg*` call in `Py_BEGIN_ALLOW_THREADS` because a remote +/// registry or a hive flush is real blocking I/O. +fn reg_call(f: impl FnOnce() -> u32) -> u32 { + crate::gil::allow_threads_then(f) +} + +/// Raise for a nonzero `Reg*` status. The `LSTATUS` *is* the Win32 +/// error (no `GetLastError`), so it feeds the error bridge verbatim — +/// `PyErr_SetFromWindowsErrWithFunction(rc, …)` in CPython. +fn check(rc: u32) -> Result<(), RuntimeError> { + if rc == ERROR_SUCCESS { + Ok(()) + } else { + Err(nt_support::win32_error_to_py(rc as i32, None)) + } +} + +/// Integer view of an int-like object, wide enough for both i64 and +/// the unsigned 64-bit face of a `Detach()`ed handle. +fn as_int_i128(o: &Object) -> Option { + match o { + Object::Bool(b) => Some(i128::from(*b)), + Object::Int(i) => Some(i128::from(*i)), + Object::Long(b) => b.to_i128(), + _ => None, + } +} + +/// A required positional argument, with CPython's missing-argument +/// `TypeError` shape. +fn required_arg<'a>( + args: &'a [Object], + idx: usize, + func: &str, + param: &str, +) -> Result<&'a Object, RuntimeError> { + args.get(idx).ok_or_else(|| { + type_error(format!( + "{func}() missing required argument '{param}' (pos {})", + idx + 1 + )) + }) +} + +/// Resolve a positional-or-keyword parameter (the clinic quartet: +/// `OpenKey`/`OpenKeyEx`/`CreateKeyEx`/`DeleteKeyEx`). +fn arg_or_kw<'a>( + args: &'a [Object], + kwargs: &'a [(String, Object)], + idx: usize, + name: &str, +) -> Option<&'a Object> { + args.get(idx) + .or_else(|| kwargs.iter().find(|(k, _)| k == name).map(|(_, v)| v)) +} + +/// Argument-clinic `int` conversion for `reserved`/`access`/`index` +/// parameters. Accepts the full unsigned 32-bit range because +/// `access` is the raw `REGSAM` mask (`KEY_WOW64_64KEY | KEY_READ` +/// style compositions are documented usage). +fn u32_arg(o: &Object, func: &str, param: &str) -> Result { + let v = as_int_i128(o).ok_or_else(|| { + type_error(format!( + "{func}() argument '{param}' must be int, not {}", + o.type_name() + )) + })?; + if !(i128::from(i32::MIN)..=i128::from(u32::MAX)).contains(&v) { + return Err(overflow_error("Python int too large to convert to C int")); + } + Ok(v as u32) +} + +// --------------------------------------------------------------------------- +// UTF-16 string plumbing +// --------------------------------------------------------------------------- + +/// UTF-16 code units (no terminator) for a string object. The WStr +/// arc matters here: registry names/values are raw UTF-16 with no +/// well-formedness guarantee, and CPython round-trips lone surrogates +/// through `PyUnicode_AsWideCharString` untouched. +fn utf16_units(o: &Object) -> Option> { + match o { + Object::Str(s) => Some(s.encode_utf16().collect()), + Object::WStr(cps) => { + let mut out = Vec::with_capacity(cps.len()); + for &cp in cps.iter() { + if cp < 0x1_0000 { + // BMP scalar or lone surrogate: one raw unit. + out.push(cp as u16); + } else { + let v = cp - 0x1_0000; + out.push((0xD800 + (v >> 10)) as u16); + out.push((0xDC00 + (v & 0x3FF)) as u16); + } + } + Some(out) + } + _ => None, + } +} + +/// Decode raw UTF-16 units to a `str`, pairing surrogates where they +/// pair and keeping lone ones (the WStr arc) — the inverse of +/// [`utf16_units`], so registry round-trips are byte-faithful. +fn str_from_utf16(units: &[u16]) -> Object { + let mut cps = Vec::with_capacity(units.len()); + let mut i = 0; + while i < units.len() { + let u = u32::from(units[i]); + if (0xD800..0xDC00).contains(&u) && i + 1 < units.len() { + let lo = u32::from(units[i + 1]); + if (0xDC00..0xE000).contains(&lo) { + cps.push(0x1_0000 + ((u - 0xD800) << 10) + (lo - 0xDC00)); + i += 2; + continue; + } + } + cps.push(u); + i += 1; + } + Object::str_from_codepoints(cps) +} + +/// Reinterpret a registry data blob as UTF-16 units (little-endian, +/// like `Reg2Py`'s `retDataSize / sizeof(WCHAR)` — a trailing odd +/// byte is dropped). +fn utf16_of_bytes(data: &[u8]) -> Vec { + data.chunks_exact(2) + .map(|c| u16::from_le_bytes([c[0], c[1]])) + .collect() +} + +/// Serialize UTF-16 units back to the byte layout `RegSetValueExW` +/// expects. +fn bytes_of_utf16(units: &[u16]) -> Vec { + let mut out = Vec::with_capacity(units.len() * 2); + for u in units { + out.extend_from_slice(&u.to_le_bytes()); + } + out +} + +/// A required `str` parameter → NUL-terminated UTF-16. +fn wide_arg(o: Option<&Object>, func: &str, param: &str) -> Result, RuntimeError> { + let obj = + o.ok_or_else(|| type_error(format!("{func}() missing required argument '{param}'")))?; + match utf16_units(obj) { + Some(mut units) => { + units.push(0); + Ok(units) + } + None => Err(type_error(format!( + "{func}() argument '{param}' must be str, not {}", + obj.type_name() + ))), + } +} + +/// A `str | None` parameter → NUL-terminated UTF-16, or `None` for +/// the NULL pointer (CPython's `Py_UNICODE` converter with +/// `accept={str, NoneType}`). +fn wide_arg_opt( + o: Option<&Object>, + func: &str, + param: &str, +) -> Result>, RuntimeError> { + match o { + None | Some(Object::None) => Ok(None), + Some(obj) => match utf16_units(obj) { + Some(mut units) => { + units.push(0); + Ok(Some(units)) + } + None => Err(type_error(format!( + "{func}() argument '{param}' must be str or None, not {}", + obj.type_name() + ))), + }, + } +} + +/// The `PCWSTR` for an optional wide buffer (`None` → NULL). +fn opt_ptr(buf: Option<&Vec>) -> *const u16 { + buf.map_or(std::ptr::null(), |v| v.as_ptr()) +} + +// --------------------------------------------------------------------------- +// The PyHKEY handle type +// --------------------------------------------------------------------------- + +thread_local! { + static HKEY_CLASS: RefCell>> = const { RefCell::new(None) }; +} + +/// The `PyHKEY` type object, built once per thread (poll-object +/// pattern — identity is per-thread but behavior is keyed on the +/// class name, which is what [`hkey_self`]/[`key_from_arg`] check). +fn hkey_type() -> Rc { + HKEY_CLASS.with(|slot| { + if let Some(c) = slot.borrow().as_ref() { + return c.clone(); + } + let bt = crate::builtin_types::builtin_types(); + let mut dict = DictData::default(); + for (name, m) in [ + ("Close", method("Close", hkey_close)), + ("Detach", method("Detach", hkey_detach)), + ("__enter__", method("__enter__", hkey_enter)), + ("__exit__", method("__exit__", hkey_exit)), + // The number protocol: bool(key) is False once closed, + // int(key)/operator.index(key) yield the raw handle + // (PyHKEY's nb_bool / nb_int / nb_index slots). + ("__bool__", method("__bool__", hkey_bool)), + ("__int__", method("__int__", hkey_int)), + ("__index__", method("__index__", hkey_int)), + ("__str__", method("__str__", hkey_str)), + // Dealloc closes the handle (PyHKEY_deallocFunc) so an + // un-`with`-ed key doesn't leak past GC. + ("__del__", method("__del__", hkey_del)), + ] { + dict.insert(DictKey(Object::from_static(name)), m); + } + // Not directly instantiable — PyHKEY_Type has no tp_new; only + // the module functions mint handles. + dict.insert( + DictKey(Object::from_static("__new__")), + builtin("__new__", hkey_new_disallowed), + ); + dict.insert( + DictKey(Object::from_static("__module__")), + Object::from_static("winreg"), + ); + let cls = TypeObject::new_user("PyHKEY", vec![bt.object_.clone()], dict) + .expect("PyHKEY class must linearise"); + *slot.borrow_mut() = Some(cls.clone()); + cls + }) +} + +fn hkey_new_disallowed(_args: &[Object]) -> Result { + Err(type_error("cannot create 'winreg.PyHKEY' instances")) +} + +/// Wrap a freshly opened `HKEY` in a `PyHKEY`. The Python-visible +/// `handle` attribute carries the unsigned face of the pointer value +/// (real registry handles are small kernel handles, so this is the +/// value `Detach()`/`int()` must return). +fn new_pyhkey(h: reg::HKEY) -> Object { + let inst = Rc::new(PyInstance::new(hkey_type())); + inst.dict.borrow_mut().insert( + DictKey(Object::from_static("handle")), + Object::int_from_i128(h as usize as i128), + ); + Object::Instance(inst) +} + +/// The receiver of a `PyHKEY` method. +fn hkey_self(args: &[Object]) -> Result, RuntimeError> { + match args.first() { + Some(Object::Instance(i)) if i.cls().name == "PyHKEY" => Ok(i.clone()), + _ => Err(type_error("descriptor requires a 'winreg.PyHKEY' object")), + } +} + +/// Read the wrapped handle value (0 = closed/detached). +fn peek_handle(inst: &PyInstance) -> i128 { + inst.dict + .borrow() + .get(&DictKey(Object::from_static("handle"))) + .and_then(as_int_i128) + .unwrap_or(0) +} + +/// Read *and neutralize* the wrapped handle — the shared core of +/// `Close`/`Detach`/`CloseKey`/dealloc. Zeroing before any OS call +/// makes every path idempotent (`PyHKEY_Close` sets `hkey = 0` +/// unconditionally). +fn take_handle(inst: &PyInstance) -> i128 { + let key = DictKey(Object::from_static("handle")); + let mut d = inst.dict.borrow_mut(); + let h = d.get(&key).and_then(as_int_i128).unwrap_or(0); + d.insert(key, Object::Int(0)); + h +} + +/// `PyHKEY_Close` semantics: neutralize, then `RegCloseKey` if a live +/// handle was held — already-closed is a silent no-op. +fn close_hkey_instance(inst: &PyInstance) -> Result { + let h = take_handle(inst); + if h != 0 { + let hk = hkey_from_i128(h); + check(reg_call(|| unsafe { reg::RegCloseKey(hk) }))?; + } + Ok(Object::None) +} + +/// `key.Close()` — close the underlying handle; idempotent. +fn hkey_close(args: &[Object]) -> Result { + let inst = hkey_self(args)?; + close_hkey_instance(&inst) +} + +/// `key.Detach()` → int — hand ownership of the raw handle to the +/// caller and neutralize the object (no close happens; the caller is +/// now responsible, typically across a thread or pickle boundary). +fn hkey_detach(args: &[Object]) -> Result { + let inst = hkey_self(args)?; + Ok(Object::int_from_i128(take_handle(&inst))) +} + +fn hkey_enter(args: &[Object]) -> Result { + let _ = hkey_self(args)?; + Ok(args[0].clone()) +} + +/// `__exit__` closes and never suppresses the exception (returns +/// `None`, which is falsy — PyHKEY___exit___impl). +fn hkey_exit(args: &[Object]) -> Result { + let inst = hkey_self(args)?; + close_hkey_instance(&inst) +} + +fn hkey_bool(args: &[Object]) -> Result { + let inst = hkey_self(args)?; + Ok(Object::Bool(peek_handle(&inst) != 0)) +} + +fn hkey_int(args: &[Object]) -> Result { + let inst = hkey_self(args)?; + Ok(Object::int_from_i128(peek_handle(&inst))) +} + +fn hkey_str(args: &[Object]) -> Result { + let inst = hkey_self(args)?; + let h = peek_handle(&inst); + Ok(Object::from_str(format!(""))) +} + +/// GC-time close. Failure is swallowed — CPython's dealloc has no way +/// to raise either. +fn hkey_del(args: &[Object]) -> Result { + if let Ok(inst) = hkey_self(args) { + let h = take_handle(&inst); + if h != 0 { + let _ = unsafe { reg::RegCloseKey(hkey_from_i128(h)) }; + } + } + Ok(Object::None) +} + +// --------------------------------------------------------------------------- +// key argument conversion (PyHKEY_AsHKEY) +// --------------------------------------------------------------------------- + +/// An int handle value → `HKEY`. The predefined-key range +/// (0x8000_0000..=0xFFFF_FFFF as the unsigned 32-bit ints CPython +/// documents) must become the sign-extended pseudo-handles the SDK's +/// `HKEY_*` macros produce — the kernel matches pseudo-handles by +/// exact pointer value on 64-bit. Real handles (small kernel handle +/// values, never in that range) and full 64-bit values from +/// `int(hkey)` pass through bit-faithfully. +fn hkey_from_i128(v: i128) -> reg::HKEY { + if (0x8000_0000..=0xFFFF_FFFF).contains(&v) { + (v as u32 as i32) as isize as reg::HKEY + } else { + v as usize as reg::HKEY + } +} + +/// `PyHKEY_AsHKEY`: every key parameter accepts a `PyHKEY` *or* a +/// plain int. A closed `PyHKEY` converts to the NULL key (the OS call +/// then fails with `ERROR_INVALID_HANDLE`), matching CPython. +fn key_from_arg(o: Option<&Object>, func: &str) -> Result { + let o = + o.ok_or_else(|| type_error(format!("{func}() missing required argument 'key' (pos 1)")))?; + if let Object::Instance(i) = o { + if i.cls().name == "PyHKEY" { + return Ok(hkey_from_i128(peek_handle(i))); + } + } + match as_int_i128(o) { + Some(v) => Ok(hkey_from_i128(v)), + None => Err(type_error("The object is not a PyHKEY object")), + } +} + +// --------------------------------------------------------------------------- +// Value marshalling (Reg2Py / Py2Reg) +// --------------------------------------------------------------------------- + +/// `Py2Reg`'s failure message, verbatim. +const CONVERT_ERR: &str = "Could not convert the data to the specified type."; + +/// `Reg2Py`: registry data blob + type → Python object. +fn reg_to_py(data: &[u8], typ: u32) -> Object { + match typ { + // A DWORD blob shorter than 4 bytes reads as 0 (Reg2Py's + // size-mismatch fallback) rather than raising — registry data + // is attacker-adjacent input and CPython chose leniency. + reg::REG_DWORD => { + if data.len() >= 4 { + Object::Int(i64::from(u32::from_le_bytes([ + data[0], data[1], data[2], data[3], + ]))) + } else { + Object::Int(0) + } + } + reg::REG_DWORD_BIG_ENDIAN => { + if data.len() >= 4 { + Object::Int(i64::from(u32::from_be_bytes([ + data[0], data[1], data[2], data[3], + ]))) + } else { + Object::Int(0) + } + } + // REG_QWORD_LITTLE_ENDIAN is the same numeric type (11). + reg::REG_QWORD => { + if data.len() >= 8 { + let mut b = [0u8; 8]; + b.copy_from_slice(&data[..8]); + Object::int_from_i128(i128::from(u64::from_le_bytes(b))) + } else { + Object::Int(0) + } + } + // "REG_SZ should be a NUL terminated string, but only by + // convention" (winreg.c) — consume up to the first NUL to + // match reg.exe/regedit.exe on malformed data; well-formed + // data just loses its single terminator. + reg::REG_SZ | reg::REG_EXPAND_SZ => { + let units = utf16_of_bytes(data); + let len = units.iter().position(|&u| u == 0).unwrap_or(units.len()); + str_from_utf16(&units[..len]) + } + // A double-NUL-terminated block of NUL-terminated strings; an + // empty string terminates the list early and a missing final + // terminator is tolerated (fixupMultiSZ). + reg::REG_MULTI_SZ => { + let units = utf16_of_bytes(data); + let mut items = Vec::new(); + let mut start = 0usize; + while start < units.len() && units[start] != 0 { + let end = units[start..] + .iter() + .position(|&u| u == 0) + .map_or(units.len(), |p| start + p); + items.push(str_from_utf16(&units[start..end])); + start = end + 1; + } + Object::new_list(items) + } + // REG_BINARY — and every type this module doesn't understand + // — surfaces as bytes, or None when empty ("all unknown data + // types" comment in Reg2Py). + _ => { + if data.is_empty() { + Object::None + } else { + Object::Bytes(Rc::from(data)) + } + } + } +} + +/// `PyLong_AsUnsignedLong` shape for REG_DWORD data: negative raises +/// OverflowError (not the generic conversion ValueError), matching +/// how Py2Reg lets the pending overflow propagate. +fn u32_data_value(value: &Object) -> Result { + let v = as_int_i128(value).ok_or_else(|| value_error(CONVERT_ERR))?; + if v < 0 { + return Err(overflow_error( + "can't convert negative value to unsigned int", + )); + } + u32::try_from(v) + .map_err(|_| overflow_error("Python int too large to convert to C unsigned long")) +} + +/// `PyLong_AsUnsignedLongLong` shape for REG_QWORD data. +fn u64_data_value(value: &Object) -> Result { + let v = as_int_i128(value).ok_or_else(|| value_error(CONVERT_ERR))?; + if v < 0 { + return Err(overflow_error( + "can't convert negative value to unsigned int", + )); + } + u64::try_from(v) + .map_err(|_| overflow_error("Python int too large to convert to C unsigned long long")) +} + +/// `Py2Reg`: Python object + declared type → registry data blob. +fn py_to_reg(value: &Object, typ: u32) -> Result, RuntimeError> { + match typ { + reg::REG_DWORD | reg::REG_DWORD_BIG_ENDIAN => { + // None stores 0 (Py2Reg's REG_DWORD None branch). + let v = match value { + Object::None => 0, + _ => u32_data_value(value)?, + }; + Ok(if typ == reg::REG_DWORD_BIG_ENDIAN { + v.to_be_bytes().to_vec() + } else { + v.to_le_bytes().to_vec() + }) + } + reg::REG_QWORD => { + let v = match value { + Object::None => 0, + _ => u64_data_value(value)?, + }; + Ok(v.to_le_bytes().to_vec()) + } + // Stored with the trailing NUL (`len + 1` wide chars in + // Py2Reg); None stores the empty string. + reg::REG_SZ | reg::REG_EXPAND_SZ => { + let mut units = match value { + Object::None => Vec::new(), + _ => utf16_units(value).ok_or_else(|| value_error(CONVERT_ERR))?, + }; + units.push(0); + Ok(bytes_of_utf16(&units)) + } + // A list (exactly — Py2Reg PyList_Checks) of str, each + // NUL-terminated, with the block's extra terminator. + reg::REG_MULTI_SZ => { + let Object::List(list) = value else { + return Err(value_error(CONVERT_ERR)); + }; + let mut units: Vec = Vec::new(); + for item in list.borrow().iter() { + let s = utf16_units(item).ok_or_else(|| value_error(CONVERT_ERR))?; + units.extend_from_slice(&s); + units.push(0); + } + units.push(0); + Ok(bytes_of_utf16(&units)) + } + // REG_BINARY and all unknown types: any buffer-protocol + // object; None stores no data at all (NULL/0 in Py2Reg, + // which is how REG_NONE values are written). + _ => match value { + Object::None => Ok(Vec::new()), + Object::Bytes(b) => Ok(b.to_vec()), + Object::ByteArray(b) => Ok(b.borrow().clone()), + Object::MemoryView(mv) => Ok(mv.to_bytes()), + _ => Err(value_error(CONVERT_ERR)), + }, + } +} + +// --------------------------------------------------------------------------- +// Module functions +// --------------------------------------------------------------------------- + +/// `CloseKey(hkey)` — closes an int handle directly, or neutralizes a +/// `PyHKEY` exactly like its `Close()` method (so the object tests +/// False afterwards). +fn winreg_close_key(args: &[Object]) -> Result { + let obj = required_arg(args, 0, "CloseKey", "hkey")?; + if let Object::Instance(i) = obj { + if i.cls().name == "PyHKEY" { + return close_hkey_instance(i); + } + } + let h = key_from_arg(Some(obj), "CloseKey")?; + check(reg_call(|| unsafe { reg::RegCloseKey(h) }))?; + Ok(Object::None) +} + +/// `ConnectRegistry(computer_name, key)` → `PyHKEY` — `None` connects +/// to the local machine (the NULL machine name). +fn winreg_connect_registry(args: &[Object]) -> Result { + let name_obj = required_arg(args, 0, "ConnectRegistry", "computer_name")?; + let name = wide_arg_opt(Some(name_obj), "ConnectRegistry", "computer_name")?; + let key = key_from_arg(args.get(1), "ConnectRegistry")?; + let name_ptr = opt_ptr(name.as_ref()); + let mut out: reg::HKEY = std::ptr::null_mut(); + let rc = reg_call(|| unsafe { reg::RegConnectRegistryW(name_ptr, key, &raw mut out) }); + check(rc)?; + Ok(new_pyhkey(out)) +} + +/// `CreateKey(key, sub_key)` → `PyHKEY`. CPython uses the legacy +/// `RegCreateKeyW`; the `RegCreateKeyExW` spelling with +/// `MAXIMUM_ALLOWED` is its documented equivalent (and `None`/empty +/// `sub_key` re-opens `key` itself, which pip's `pep514` probing +/// relies on). +fn winreg_create_key(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "CreateKey")?; + let sub = wide_arg_opt(args.get(1), "CreateKey", "sub_key")?.unwrap_or_else(|| vec![0]); + let mut out: reg::HKEY = std::ptr::null_mut(); + let rc = reg_call(|| unsafe { + reg::RegCreateKeyExW( + key, + sub.as_ptr(), + 0, + std::ptr::null(), + reg::REG_OPTION_NON_VOLATILE, + MAXIMUM_ALLOWED, + std::ptr::null(), + &raw mut out, + std::ptr::null_mut(), + ) + }); + check(rc)?; + Ok(new_pyhkey(out)) +} + +/// `CreateKeyEx(key, sub_key, reserved=0, access=KEY_WRITE)` → +/// `PyHKEY`. +fn winreg_create_key_ex( + args: &[Object], + kwargs: &[(String, Object)], +) -> Result { + let key = key_from_arg(arg_or_kw(args, kwargs, 0, "key"), "CreateKeyEx")?; + let sub = wide_arg_opt( + arg_or_kw(args, kwargs, 1, "sub_key"), + "CreateKeyEx", + "sub_key", + )? + .unwrap_or_else(|| vec![0]); + let reserved = match arg_or_kw(args, kwargs, 2, "reserved") { + Some(o) => u32_arg(o, "CreateKeyEx", "reserved")?, + None => 0, + }; + let access = match arg_or_kw(args, kwargs, 3, "access") { + Some(o) => u32_arg(o, "CreateKeyEx", "access")?, + None => reg::KEY_WRITE, + }; + let mut out: reg::HKEY = std::ptr::null_mut(); + let rc = reg_call(|| unsafe { + reg::RegCreateKeyExW( + key, + sub.as_ptr(), + reserved, + std::ptr::null(), + reg::REG_OPTION_NON_VOLATILE, + access, + std::ptr::null(), + &raw mut out, + std::ptr::null_mut(), + ) + }); + check(rc)?; + Ok(new_pyhkey(out)) +} + +/// `DeleteKey(key, sub_key)` — the subkey must have no children +/// (the API refuses recursive deletes; `shutil`-style recursion is a +/// Python-level affair). +fn winreg_delete_key(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "DeleteKey")?; + let sub = wide_arg(args.get(1), "DeleteKey", "sub_key")?; + check(reg_call(|| unsafe { + reg::RegDeleteKeyW(key, sub.as_ptr()) + }))?; + Ok(Object::None) +} + +/// `DeleteKeyEx(key, sub_key, access=KEY_WOW64_64KEY, reserved=0)` — +/// the WOW64-aware delete (CPython loads `RegDeleteKeyExW` +/// dynamically for pre-Vista compatibility; we link it directly). +fn winreg_delete_key_ex( + args: &[Object], + kwargs: &[(String, Object)], +) -> Result { + let key = key_from_arg(arg_or_kw(args, kwargs, 0, "key"), "DeleteKeyEx")?; + let sub = wide_arg( + arg_or_kw(args, kwargs, 1, "sub_key"), + "DeleteKeyEx", + "sub_key", + )?; + let access = match arg_or_kw(args, kwargs, 2, "access") { + Some(o) => u32_arg(o, "DeleteKeyEx", "access")?, + None => reg::KEY_WOW64_64KEY, + }; + let reserved = match arg_or_kw(args, kwargs, 3, "reserved") { + Some(o) => u32_arg(o, "DeleteKeyEx", "reserved")?, + None => 0, + }; + let rc = reg_call(|| unsafe { reg::RegDeleteKeyExW(key, sub.as_ptr(), access, reserved) }); + check(rc)?; + Ok(Object::None) +} + +/// `DeleteValue(key, value)` — `None` deletes the key's default +/// value. +fn winreg_delete_value(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "DeleteValue")?; + let value = wide_arg_opt(args.get(1), "DeleteValue", "value")?; + let value_ptr = opt_ptr(value.as_ref()); + check(reg_call(|| unsafe { reg::RegDeleteValueW(key, value_ptr) }))?; + Ok(Object::None) +} + +fn winreg_disable_reflection_key(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "DisableReflectionKey")?; + check(reg_call(|| unsafe { reg::RegDisableReflectionKey(key) }))?; + Ok(Object::None) +} + +fn winreg_enable_reflection_key(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "EnableReflectionKey")?; + check(reg_call(|| unsafe { reg::RegEnableReflectionKey(key) }))?; + Ok(Object::None) +} + +/// `QueryReflectionKey(key)` → bool — True when reflection is +/// *disabled* (the API's out-parameter polarity, kept as-is like +/// CPython). +fn winreg_query_reflection_key(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "QueryReflectionKey")?; + let mut disabled = 0i32; + let rc = reg_call(|| unsafe { reg::RegQueryReflectionKey(key, &raw mut disabled) }); + check(rc)?; + Ok(Object::Bool(disabled != 0)) +} + +/// `EnumKey(key, index)` → str. The 257-wide buffer is winreg.c's: +/// key names cap at 255 UCS-2 chars, +1 terminator, +1 for paranoia. +fn winreg_enum_key(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "EnumKey")?; + let index = u32_arg( + required_arg(args, 1, "EnumKey", "index")?, + "EnumKey", + "index", + )?; + let mut buf = [0u16; 257]; + let mut len = buf.len() as u32; + let ptr = buf.as_mut_ptr(); + let rc = reg_call(|| unsafe { + reg::RegEnumKeyExW( + key, + index, + ptr, + &raw mut len, + std::ptr::null(), + std::ptr::null_mut(), + std::ptr::null_mut(), + std::ptr::null_mut(), + ) + }); + // Enumeration past the end surfaces as OSError from + // ERROR_NO_MORE_ITEMS — callers loop until it (CPython does the + // same; there is no sentinel return). + check(rc)?; + Ok(str_from_utf16(&buf[..len as usize])) +} + +/// `EnumValue(key, index)` → `(name, value, type)`. Buffer sizes come +/// from `RegQueryInfoKeyW` (max name/data across the key), and the +/// data buffer doubles on `ERROR_MORE_DATA` — another writer can grow +/// a value between the two calls (winreg.c's retry loop). +fn winreg_enum_value(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "EnumValue")?; + let index = u32_arg( + required_arg(args, 1, "EnumValue", "index")?, + "EnumValue", + "index", + )?; + let mut max_name = 0u32; + let mut max_data = 0u32; + let rc = reg_call(|| unsafe { + reg::RegQueryInfoKeyW( + key, + std::ptr::null_mut(), + std::ptr::null_mut(), + std::ptr::null(), + std::ptr::null_mut(), + std::ptr::null_mut(), + std::ptr::null_mut(), + std::ptr::null_mut(), + &raw mut max_name, + &raw mut max_data, + std::ptr::null_mut(), + std::ptr::null_mut(), + ) + }); + check(rc)?; + // +1 for the terminators the counts exclude. + let mut name_buf = vec![0u16; max_name as usize + 1]; + let mut data_buf = vec![0u8; max_data as usize + 1]; + loop { + let mut name_len = name_buf.len() as u32; + let mut data_len = data_buf.len() as u32; + let mut typ = 0u32; + let name_ptr = name_buf.as_mut_ptr(); + let data_ptr = data_buf.as_mut_ptr(); + let rc = reg_call(|| unsafe { + reg::RegEnumValueW( + key, + index, + name_ptr, + &raw mut name_len, + std::ptr::null(), + &raw mut typ, + data_ptr, + &raw mut data_len, + ) + }); + if rc == ERROR_MORE_DATA { + let grown = data_buf.len() * 2; + data_buf.resize(grown, 0); + continue; + } + check(rc)?; + let name = str_from_utf16(&name_buf[..name_len as usize]); + let value = reg_to_py(&data_buf[..data_len as usize], typ); + return Ok(Object::new_tuple(vec![ + name, + value, + Object::Int(i64::from(typ)), + ])); + } +} + +/// `ExpandEnvironmentStrings(string)` → str — `%NAME%` expansion via +/// the same API `REG_EXPAND_SZ` consumers use. +fn winreg_expand_environment_strings(args: &[Object]) -> Result { + let src = wide_arg(args.first(), "ExpandEnvironmentStrings", "string")?; + // Size query first (returns the required buffer length in wide + // chars, including the terminator); 0 is failure. + let needed = unsafe { ExpandEnvironmentStringsW(src.as_ptr(), std::ptr::null_mut(), 0) }; + if needed == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + let mut buf = vec![0u16; needed as usize]; + let src_ptr = src.as_ptr(); + let dst_ptr = buf.as_mut_ptr(); + let written = reg_call(|| unsafe { ExpandEnvironmentStringsW(src_ptr, dst_ptr, needed) }); + if written == 0 { + return Err(nt_support::last_win32_error_to_py(None)); + } + let len = buf.iter().position(|&u| u == 0).unwrap_or(buf.len()); + Ok(str_from_utf16(&buf[..len])) +} + +/// `FlushKey(key)` — the synchronous hive flush ("Registry equivalent +/// of a commit", per the CPython docstring; rarely needed). +fn winreg_flush_key(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "FlushKey")?; + check(reg_call(|| unsafe { reg::RegFlushKey(key) }))?; + Ok(Object::None) +} + +/// `LoadKey(key, sub_key, file_name)` — mount a saved hive under +/// `key\sub_key` (needs SeRestorePrivilege; the API reports the +/// failure when it's missing, so no privilege pre-check here). +fn winreg_load_key(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "LoadKey")?; + let sub = wide_arg(args.get(1), "LoadKey", "sub_key")?; + let file = wide_arg(args.get(2), "LoadKey", "file_name")?; + let rc = reg_call(|| unsafe { reg::RegLoadKeyW(key, sub.as_ptr(), file.as_ptr()) }); + check(rc)?; + Ok(Object::None) +} + +/// `OpenKey(key, sub_key, reserved=0, access=KEY_READ)` → `PyHKEY`. +/// `OpenKeyEx` is registered as the same function (CPython aliases +/// the two implementations). +fn winreg_open_key(args: &[Object], kwargs: &[(String, Object)]) -> Result { + let key = key_from_arg(arg_or_kw(args, kwargs, 0, "key"), "OpenKey")?; + let sub = wide_arg_opt(arg_or_kw(args, kwargs, 1, "sub_key"), "OpenKey", "sub_key")?; + let reserved = match arg_or_kw(args, kwargs, 2, "reserved") { + Some(o) => u32_arg(o, "OpenKey", "reserved")?, + None => 0, + }; + let access = match arg_or_kw(args, kwargs, 3, "access") { + Some(o) => u32_arg(o, "OpenKey", "access")?, + None => reg::KEY_READ, + }; + let sub_ptr = opt_ptr(sub.as_ref()); + let mut out: reg::HKEY = std::ptr::null_mut(); + let rc = + reg_call(|| unsafe { reg::RegOpenKeyExW(key, sub_ptr, reserved, access, &raw mut out) }); + check(rc)?; + Ok(new_pyhkey(out)) +} + +/// `QueryInfoKey(key)` → `(num_subkeys, num_values, last_modified)`, +/// the timestamp being the raw FILETIME quadword — 100-nanosecond +/// intervals since Jan 1, 1601 (winreg.c packs the two halves into a +/// LARGE_INTEGER and returns QuadPart). +fn winreg_query_info_key(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "QueryInfoKey")?; + let mut nsubkeys = 0u32; + let mut nvalues = 0u32; + let mut ft = FILETIME { + dwLowDateTime: 0, + dwHighDateTime: 0, + }; + let rc = reg_call(|| unsafe { + reg::RegQueryInfoKeyW( + key, + std::ptr::null_mut(), + std::ptr::null_mut(), + std::ptr::null(), + &raw mut nsubkeys, + std::ptr::null_mut(), + std::ptr::null_mut(), + &raw mut nvalues, + std::ptr::null_mut(), + std::ptr::null_mut(), + std::ptr::null_mut(), + &raw mut ft, + ) + }); + check(rc)?; + let quad = (u64::from(ft.dwHighDateTime) << 32) | u64::from(ft.dwLowDateTime); + Ok(Object::new_tuple(vec![ + Object::Int(i64::from(nsubkeys)), + Object::Int(i64::from(nvalues)), + Object::int_from_i128(i128::from(quad)), + ])) +} + +/// The default (unnamed) value of `key`, REG_SZ-only — the shared +/// tail of `QueryValue` after any subkey open. +fn query_default_value(key: reg::HKEY) -> Result { + let mut typ = 0u32; + let mut buf = vec![0u8; 512]; + let size = loop { + let mut size = buf.len() as u32; + let data_ptr = buf.as_mut_ptr(); + let rc = reg_call(|| unsafe { + reg::RegQueryValueExW( + key, + std::ptr::null(), + std::ptr::null(), + &raw mut typ, + data_ptr, + &raw mut size, + ) + }); + if rc == ERROR_MORE_DATA { + let need = (size as usize).max(buf.len() * 2); + buf.resize(need, 0); + continue; + } + // "FILE_NOT_FOUND means that the value is undefined, not that + // the key doesn't exist" (winreg.c) — an unset default value + // reads as the empty string. + if rc == ERROR_FILE_NOT_FOUND { + return Ok(Object::from_static("")); + } + check(rc)?; + break size; + }; + if typ != reg::REG_SZ { + // Non-string default values are a hard error, reported as the + // Win32 ERROR_INVALID_DATA like CPython. + return Err(nt_support::win32_error_to_py( + ERROR_INVALID_DATA as i32, + None, + )); + } + Ok(reg_to_py(&buf[..size as usize], reg::REG_SZ)) +} + +/// `QueryValue(key, sub_key)` → str — the legacy default-value read. +/// A non-empty `sub_key` is opened with `KEY_QUERY_VALUE` first (and +/// always closed again, even on error), per the 3.13 rewrite of +/// winreg_QueryValue_impl. +fn winreg_query_value(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "QueryValue")?; + let sub = wide_arg_opt(args.get(1), "QueryValue", "sub_key")?; + let mut child = key; + let mut opened = false; + if let Some(s) = &sub { + // len > 1: the buffer holds more than the terminator. + if s.len() > 1 { + let sub_ptr = s.as_ptr(); + let rc = reg_call(|| unsafe { + reg::RegOpenKeyExW(key, sub_ptr, 0, reg::KEY_QUERY_VALUE, &raw mut child) + }); + check(rc)?; + opened = true; + } + } + let result = query_default_value(child); + if opened { + // Close failure is swallowed — the read already succeeded or + // failed on its own terms (CPython ignores this rc too). + let _ = unsafe { reg::RegCloseKey(child) }; + } + result +} + +/// `QueryValueEx(key, name)` → `(value, type)`. Size probe first, +/// then the `ERROR_MORE_DATA` doubling loop (a concurrent writer can +/// grow the value between the probe and the read). +fn winreg_query_value_ex(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "QueryValueEx")?; + let name = wide_arg_opt(args.get(1), "QueryValueEx", "name")?; + let name_ptr = opt_ptr(name.as_ref()); + let mut buf_size = 0u32; + let rc = reg_call(|| unsafe { + reg::RegQueryValueExW( + key, + name_ptr, + std::ptr::null(), + std::ptr::null_mut(), + std::ptr::null_mut(), + &raw mut buf_size, + ) + }); + if rc == ERROR_MORE_DATA { + buf_size = 256; + } else { + check(rc)?; + } + let mut buf = vec![0u8; buf_size as usize]; + let mut typ = 0u32; + let size = loop { + let mut size = buf.len() as u32; + let data_ptr = buf.as_mut_ptr(); + let rc = reg_call(|| unsafe { + reg::RegQueryValueExW( + key, + name_ptr, + std::ptr::null(), + &raw mut typ, + data_ptr, + &raw mut size, + ) + }); + if rc == ERROR_MORE_DATA { + let grown = (buf.len() * 2).max(256); + buf.resize(grown, 0); + continue; + } + check(rc)?; + break size; + }; + let value = reg_to_py(&buf[..size as usize], typ); + Ok(Object::new_tuple(vec![value, Object::Int(i64::from(typ))])) +} + +/// `SaveKey(key, file_name)` — write the subtree to a hive file +/// (needs SeBackupPrivilege; NULL security attributes make the file +/// inherit-default, like CPython's `pSA = NULL`). +fn winreg_save_key(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "SaveKey")?; + let file = wide_arg(args.get(1), "SaveKey", "file_name")?; + let rc = reg_call(|| unsafe { reg::RegSaveKeyW(key, file.as_ptr(), std::ptr::null()) }); + check(rc)?; + Ok(Object::None) +} + +/// `SetValue(key, sub_key, type, value)` — the legacy default-value +/// write. `type` must be REG_SZ (a `TypeError`, not `ValueError` — +/// winreg.c checks it before touching the API), and a non-empty +/// `sub_key` is created/opened with `KEY_SET_VALUE` first, per the +/// 3.13 rewrite of winreg_SetValue_impl. +fn winreg_set_value(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "SetValue")?; + let sub = wide_arg_opt(args.get(1), "SetValue", "sub_key")?; + let typ = u32_arg( + required_arg(args, 2, "SetValue", "type")?, + "SetValue", + "type", + )?; + if typ != reg::REG_SZ { + return Err(type_error("type must be winreg.REG_SZ")); + } + let value = wide_arg(args.get(3), "SetValue", "value")?; // NUL-terminated + let mut child = key; + let mut opened = false; + if let Some(s) = &sub { + if s.len() > 1 { + let sub_ptr = s.as_ptr(); + let rc = reg_call(|| unsafe { + reg::RegCreateKeyExW( + key, + sub_ptr, + 0, + std::ptr::null(), + reg::REG_OPTION_NON_VOLATILE, + reg::KEY_SET_VALUE, + std::ptr::null(), + &raw mut child, + std::ptr::null_mut(), + ) + }); + check(rc)?; + opened = true; + } + } + // The stored data includes the terminator (wcslen + 1 in + // winreg.c), hence the full buffer length here. + let byte_len = (value.len() * 2) as u32; + let value_ptr = value.as_ptr().cast::(); + let rc = reg_call(|| unsafe { + reg::RegSetValueExW(child, std::ptr::null(), 0, reg::REG_SZ, value_ptr, byte_len) + }); + if opened { + let _ = unsafe { reg::RegCloseKey(child) }; + } + check(rc)?; + Ok(Object::None) +} + +/// `SetValueEx(key, value_name, reserved, type, value)` — the typed +/// value write. `reserved` is accepted and ignored (CPython's clinic +/// takes it as an arbitrary object and passes 0 to the API). +fn winreg_set_value_ex(args: &[Object]) -> Result { + let key = key_from_arg(args.first(), "SetValueEx")?; + let name = wide_arg_opt(args.get(1), "SetValueEx", "value_name")?; + let _reserved = required_arg(args, 2, "SetValueEx", "reserved")?; + let typ = u32_arg( + required_arg(args, 3, "SetValueEx", "type")?, + "SetValueEx", + "type", + )?; + let value = required_arg(args, 4, "SetValueEx", "value")?; + let data = py_to_reg(value, typ)?; + let name_ptr = opt_ptr(name.as_ref()); + // NULL data pointer for empty payloads — a dangling Vec pointer + // would be technically non-null-but-invalid, and the API accepts + // NULL with cbData 0 (how REG_NONE/empty REG_BINARY are written). + let data_ptr = if data.is_empty() { + std::ptr::null() + } else { + data.as_ptr() + }; + let data_len = data.len() as u32; + let rc = reg_call(|| unsafe { reg::RegSetValueExW(key, name_ptr, 0, typ, data_ptr, data_len) }); + check(rc)?; + Ok(Object::None) +} diff --git a/crates/weavepy-vm/src/stdlib_tree.rs b/crates/weavepy-vm/src/stdlib_tree.rs index ed889218..29eab906 100644 --- a/crates/weavepy-vm/src/stdlib_tree.rs +++ b/crates/weavepy-vm/src/stdlib_tree.rs @@ -64,6 +64,20 @@ const DATA_FILES: &[(&str, &str)] = &[ "venv/scripts/posix/activate.csh", include_str!("stdlib/python/venv/scripts/posix/activate.csh"), ), + // The NT activation pair (RFC 0063 WS6), adopted verbatim from + // CPython 3.13's `Lib/venv/scripts/nt/` — including the chcp + // code-page save/restore dance and `VIRTUAL_ENV_PROMPT`. CRLF line + // endings are load-bearing for cmd.exe and preserved end to end + // (a directory-local .gitattributes exempts them from the repo's + // LF normalization). `Activate.ps1` already lives in `common`. + ( + "venv/scripts/nt/activate.bat", + include_str!("stdlib/python/venv/scripts/nt/activate.bat"), + ), + ( + "venv/scripts/nt/deactivate.bat", + include_str!("stdlib/python/venv/scripts/nt/deactivate.bat"), + ), // pydoc's stylesheet, served by `pydoc` and `xmlrpc.server`'s // DocXMLRPCServer (`_get_css` opens it relative to `__file__`). ( @@ -402,6 +416,12 @@ fn resolve() -> Option { /// Walk `exe`'s ancestors for the installed-layout landmark /// (`{d}/lib/weavepy3.13/.weavepy-complete`). +/// +/// The walk starts at the exe's own directory, which covers both +/// artifact shapes without a special case: the POSIX layout +/// (`{prefix}/bin/weavepy`) finds the landmark one level up, and the +/// RFC 0063 WS6 NT layout — `python.exe` at the prefix root, no +/// `bin\` — finds `{prefix}/lib/weavepy3.13` on the very first probe. fn landmark_walk(exe: &Path) -> Option { let mut dir = exe.parent(); while let Some(d) = dir { @@ -497,7 +517,10 @@ fn materialize(prefix: &Path) -> bool { // paths real inside our private prefix: a `python3.13` symlink // onto the tree (POSIX only) and an empty `site-packages`. // Nothing outside this hash-keyed prefix ever resolves the - // alias, so it cannot shadow a CPython install. + // alias, so it cannot shadow a CPython install. On Windows the + // symlink is skipped outright — the `nt` scheme names + // `lib/weavepy3.13` directly (RFC 0063 WS6), so there is no + // alias to make real (and NTFS symlinks need privileges). std::fs::create_dir_all(tmp_lib.join("site-packages"))?; #[cfg(unix)] { @@ -559,15 +582,21 @@ fn materialize(prefix: &Path) -> bool { ), )?; // RFC 0062 WS2 — the installable header surface. A real - // CPython install ships `{prefix}/include/python3.13/` - // with the full `Include/` tree plus the generated - // `pyconfig.h`; that directory is what `INCLUDEPY` points - // at and what setuptools hands to the compiler for an - // sdist's C extensions. Write the embedded stock tree - // (vendored, PSF-licensed) and the per-OS `pyconfig.h`. - let include_dir = tmp_prefix - .join("include") - .join(format!("python{version_short}")); + // CPython install ships the full `Include/` tree plus the + // generated `pyconfig.h` under `{prefix}/include/python3.13/` + // on POSIX and directly under `{prefix}\Include` on Windows + // (RFC 0063 WS6 — sysconfig's `nt` scheme and therefore + // `INCLUDEPY` resolve there, with no versioned subdir). + // That directory is what setuptools hands to the compiler + // for an sdist's C extensions. Write the embedded stock + // tree (vendored, PSF-licensed) and the per-OS `pyconfig.h`. + let include_dir = if cfg!(windows) { + tmp_prefix.join("Include") + } else { + tmp_prefix + .join("include") + .join(format!("python{version_short}")) + }; for (rel, contents) in crate::cpython_headers::CPYTHON_HEADERS { let path: PathBuf = include_dir.join(rel.split('/').collect::()); if let Some(dir) = path.parent() { @@ -578,8 +607,10 @@ fn materialize(prefix: &Path) -> bool { std::fs::write( include_dir.join("pyconfig.h"), crate::cpython_headers::PYCONFIG_H.unwrap_or( - // Non-POSIX targets (Windows) keep the pre-0062 - // stub until the MSVC wave lands. + // Windows keeps the pre-0062 stub: C builds there + // await the python313.dll wave (RFC 0063 + // Non-goals — a static exe has nothing for a + // .pyd's PE import table to resolve against). "/* Generated by WeavePy (RFC 0055); mirrors _sysconfigdata. */\n\ #define PY_VERSION_HEX 0x030d00f0\n\ #define SIZEOF_VOID_P 8\n\ diff --git a/docs/rfcs/0063-windows-wave-nt-native-runtime.md b/docs/rfcs/0063-windows-wave-nt-native-runtime.md new file mode 100644 index 00000000..d0b6142d --- /dev/null +++ b/docs/rfcs/0063-windows-wave-nt-native-runtime.md @@ -0,0 +1,677 @@ +# RFC 0063: The Windows wave — NT-native runtime core, CRT fd model, IOCP asyncio, and measured Windows baselines + +- **Status**: Accepted +- **Authors**: WeavePy authors +- **Created**: 2026-08-11 +- **Tracking issue**: TBD +- **Builds on**: RFC 0062 (per-OS expectation keys, per-platform bench + baselines, the dist builder and check matrix this wave extends to a + zip artifact), RFC 0053 (the landmark-walk prefix discovery that + already special-cases `%LOCALAPPDATA%` and `;`-separated + `PYTHONHOME`), RFC 0040/0042 (the systems/networking stdlib whose + POSIX bodies gain NT twins), RFC 0026 (multiprocessing, whose + Windows frozen files have been shipped-but-dead since), RFC 0054 + (asyncio, whose `windows_events`/`windows_utils` modules await + `_overlapped`), RFC 0022/0043 (the C-API/FFI layer whose ctypes + call gate gains the Win64 ABI). + +## Summary + +WeavePy claims "drop-in replacement" and backs it with measured +baselines — on exactly two platforms. On Windows, the platform with +the largest desktop Python install base, WeavePy today is a binary +that compiles and passes `cargo test`, and nothing else: `os.open` +raises `NotImplementedError`, `select.select` raises `OSError`, +Ctrl-C is never delivered, `fileno()` would return a raw `HANDLE` +where every consumer expects a CRT fd, and the four native modules +the frozen Windows stdlib already imports — `_winapi`, `msvcrt`, +`winreg`, `_overlapped` — do not exist. This wave lands the NT-native +runtime core: a CRT-fd model matching CPython's (`_open_osfhandle` / +`_get_osfhandle` at the io/mmap/socket boundaries), a +`winerror`-truthful `OSError` taxonomy, the `_winapi` + `msvcrt` + +`winreg` + `_overlapped` quartet as real Rust modules over +`windows-sys`, Winsock `select`, the Win64 ctypes call gate, +`mbcs`/`oem` codecs, Ctrl-C via `SetConsoleCtrlHandler`, spawn-method +multiprocessing over named pipes, and IOCP-backed proactor asyncio. +Distribution follows: the dist builder grows a zip format and a +CPython-shaped Windows layout (`python.exe` at the prefix root, +`Scripts\` venvs), and CI grows Windows regrtest / ecosystem / bench +/ dist lanes that upload measured artifacts, advisory until their +first measured baselines are committed — the same +mechanism-first-then-measurement discipline RFC 0062 used for Linux +bench. The blocking gate that lands *with* the wave is the existing +`windows-latest` `cargo test` job, grown with Windows-gated +integration tests that boot the interpreter and exercise every new +module for real. + +## Motivation + +1. **The claim is untested where most users are.** Every measured + number in the README — 515/548 regrtest, 31/31 ecosystem — is a + macOS/Linux number. Python's desktop install base is majority + Windows; a "drop-in replacement" that cannot open a file there is + not one. The cost of inaction compounds: every wave that lands + POSIX-only deepens the `libc::` monoculture (233 call sites in + `os.rs` alone) and makes the eventual port more invasive. + +2. **The pure-Python half is already shipped and dead.** The frozen + tree embeds `ntpath`, `asyncio/windows_events.py`, + `multiprocessing/popen_spawn_win32.py`, `ctypes/wintypes.py`, the + sysconfig `nt`/`nt_venv` schemes, and the `pathlib` Windows + classes unconditionally — RFC 0026 and 0054 froze them "for + completeness but never imported on POSIX". They import `_winapi`, + `msvcrt`, and `_overlapped`, none of which exist. The marginal + cost of making Windows real is concentrated in the native layer, + because the Python layer was paid for in prior waves. + +3. **The foundations landed one wave ago.** RFC 0062 shipped per-OS + expectation keys (`status_windows` — mechanism live, zero rows + using it), per-platform bench baselines with an + advisory-when-missing gate, `.exe`-aware artifact naming, and + `;`-separated `PYTHONHOME`. RFC 0053's landmark walk already picks + `%LOCALAPPDATA%\weavepy` as the Windows cache root. The port has a + prepared slot to land in. + +4. **Half-support is worse than none.** Today `import fcntl` succeeds + on a Windows build and returns stubs that fail at call time + (CPython: the import fails, and portable code keys off that); + `sys.builtin_module_names` advertises modules that don't exist; + `OSError` has a `winerror` slot that is never populated. Portable + code that correctly branches on documented signals gets the wrong + branch. Making the signals truthful is itself a compatibility fix. + +## CPython reference + +- **fd model**: CPython on Windows works in CRT file descriptors + everywhere Python-visible (`Modules/posixmodule.c` uses `_wopen`, + `_read`, `_write`, `_close`; `PC/msvcrtmodule.c` exposes + `get_osfhandle`/`open_osfhandle` as the fd↔HANDLE bridge). + `socket.fileno()` is the one exception: it returns the `SOCKET` + (an unrelated kernel-handle namespace), and `select.select` / + `_overlapped` consume SOCKETs, not fds. +- **`_winapi`**: `Modules/_winapi.c` — the private Win32 surface + `subprocess`, `multiprocessing`, and `shutil` consume: + `CreateProcess`, `CreatePipe`, `CreateNamedPipe`/`ConnectNamedPipe`, + `CreateFile`, `CreateJunction`, `DuplicateHandle`, + `WaitForSingleObject`/`WaitForMultipleObjects`, `CreateEventW`, + `CreateMutexW`, `OpenProcess`, `TerminateProcess`, + `GetExitCodeProcess`, `GetStdHandle`, `ReadFile`/`WriteFile`, + `PeekNamedPipe`, `GetLastError`, the `STARTF_*`/`CREATE_*` + constant families, and the `Overlapped` helper type. +- **`msvcrt`**: `PC/msvcrtmodule.c` — `get_osfhandle`, + `open_osfhandle`, `setmode`, `locking`, `get_error_mode`, + `CrtSetReportMode`, console I/O (`kbhit`, `getch`/`getwch`, + `putch`/`putwch`, `ungetch`). +- **`winreg`**: `PC/winreg.c` — `OpenKey`/`CreateKey(Ex)`, + `EnumKey`/`EnumValue`, `QueryValueEx`/`SetValueEx`, + `DeleteKey(Ex)`/`DeleteValue`, `QueryInfoKey`, `ConnectRegistry`, + the `PyHKEY` handle type with context-manager semantics, and the + `REG_*`/`KEY_*`/`HKEY_*` constants; value round-trips per type + (`REG_SZ`/`EXPAND_SZ` UTF-16, `REG_MULTI_SZ` list-of-str, + `REG_DWORD`/`QWORD`, `REG_BINARY` bytes). +- **`_overlapped`**: `Modules/overlapped.c` — the IOCP layer under + `asyncio.ProactorEventLoop`: `CreateIoCompletionPort`, + `GetQueuedCompletionStatus`, `PostQueuedCompletionStatus`, + `CreateEvent`/`SetEvent`/`ResetEvent`, + `RegisterWaitWithQueue`/`UnregisterWait(Ex)`, `ConnectPipe`, and + the `Overlapped` type with `ReadFile`, `WriteFile`, `WSARecv`, + `WSASend`, `AcceptEx`, `ConnectEx`, `TransmitFile`, `DisconnectEx`, + `cancel`, `getresult`. +- **Errors**: `Objects/exceptions.c` `oserror_parse_args` — on + Windows a raw Win32 error is translated to an approximate errno + (`PC/errmap.h`, generated `winerror_to_errno`), the original code + is preserved on `OSError.winerror`, and `strerror` comes from + `FormatMessageW`. Winsock `WSAE*` codes ≥ 10000 pass through as + errno values (`errno.WSAEWOULDBLOCK == 10035`). +- **Signals**: `Modules/signalmodule.c` — Windows supports the C90 + set plus `SIGBREAK`; Ctrl-C arrives via `SetConsoleCtrlHandler` + (`CTRL_C_EVENT`/`CTRL_BREAK_EVENT`), trips the flag, and the eval + loop raises `KeyboardInterrupt`. +- **Codecs**: `Objects/unicodeobject.c` code-page codecs — + `mbcs` = `CP_ACP` and `oem` = `CP_OEMCP` via + `MultiByteToWideChar`/`WideCharToMultiByte`; + `Lib/encodings/mbcs.py` and `oem.py` are two-line shims over + `codecs.code_page_encode/decode`. +- **Layout**: CPython Windows installs put `python.exe` at the + prefix root, the stdlib under `Lib\`, headers under `Include\`; + venvs use `Scripts\python.exe` (the `nt_venv` sysconfig scheme). + `sys.getwindowsversion()`, `sys.winver`, `time.monotonic` via + `QueryPerformanceCounter`. +- **ctypes**: `Modules/_ctypes/` — on Win64 there is one calling + convention (the distinction between `CFUNCTYPE` and `WINFUNCTYPE` + is vestigial); `FormatError`, `GetLastError`, + `get_last_error`/`set_last_error` (the `use_last_error` protocol + swaps a thread-local around the foreign call), `WinDLL`/`windll`/ + `oledll`, HRESULT checking. + +## Detailed design + +The wave is seven workstreams. WS1 (fd + error model) is the +foundation everything else consumes; WS2–WS5 are the native modules +in dependency order; WS6 is distribution; WS7 is measurement. The +implementation-verification channel for all of them is twofold: +`cargo build` for the `x86_64-pc-windows-msvc` target must stay +clean locally (rlib builds fully compile the Windows code without +linking), and the existing blocking `windows-latest` `cargo test` CI +job gains Windows-gated integration tests that boot the interpreter +and exercise each new surface end-to-end. + +### WS1 — the NT foundation: CRT fds, winerror, signals, sys surface + +**Dependency.** `weavepy-vm` gains a target-scoped dependency on +`windows-sys` (Win32 API bindings; features enumerated per use: +`Win32_Storage_FileSystem`, `Win32_System_Threading`, +`Win32_System_Pipes`, `Win32_System_IO`, `Win32_Networking_WinSock`, +`Win32_System_Registry`, `Win32_System_Console`, +`Win32_Security_Cryptography`, `Win32_Globalization`, …). CRT +functions (`_open_osfhandle`, `_get_osfhandle`, `_wopen`, `_read`, +`_write`, `_close`, `_dup`, `_dup2`, `_pipe`, `_lseeki64`, +`_chsize_s`, `_isatty`, `_setmode`, `_locking`, `_kbhit`, `_getwch`, +…) are declared as `extern "C"` imports from the UCRT the MSVC +target already links. + +**The fd model — the wave's load-bearing decision.** WeavePy on +Windows adopts CPython's CRT-fd model: + +- `os.open` opens via `_wopen` (UTF-16 path, `O_BINARY` implied like + CPython, `O_NOINHERIT` for `close_on_exec` semantics) and returns + the CRT fd. `os.read`/`os.write`/`os.close`/`os.dup`/`os.dup2`/ + `os.lseek`/`os.ftruncate`/`os.isatty`/`os.pipe` map to their CRT + twins (`os.pipe` via `CreatePipe` + `_open_osfhandle`, matching + CPython's non-inheritable default). The `#[cfg(not(unix))]` + `NotImplementedError` stubs in `os.rs` are deleted, not gated. +- `FileIO` on Windows becomes fd-backed like the Unix hot path: + where Unix `io.rs` snapshots `AsRawFd` and drains via + `libc::read`/`libc::write` with the GIL released, Windows does the + same over `_read`/`_write` on the CRT fd. The fd is the single + owner; `std::fs::File` views (needed for metadata calls) are + constructed non-owning from `_get_osfhandle` and leaked back via + `ManuallyDrop`. `fileno()` returns the CRT fd — the + `as_raw_handle() as i64` branch in `object.rs` is retired. +- `mmap.file_from_fileno` stops treating the int as a `HANDLE` and + bridges via `_get_osfhandle` (the comment in `mmap_mod.rs` already + anticipated this). `flush()` gains the `FlushViewOfFile` + + `FlushFileBuffers` pair; `size()` gains `GetFileSizeEx`. +- Sockets keep the `SOCKET`-as-fileno model (CPython does too); + nothing changes there. + +**The error model.** `error.rs::io_error_to_py` grows the Windows +arm: `raw_os_error()` on Windows is the Win32 error; it is mapped to +an approximate errno via a generated `winerror_to_errno` table (the +`PC/errmap.h` mapping, ~120 entries, transcribed as a Rust match), +the original code is stored on `OSError.winerror`, `strerror` comes +from `FormatMessageW` (trailing CRLF trimmed, like CPython), and the +PEP 3151 subclass is chosen from the *mapped errno* so +`FileNotFoundError`/`PermissionError`/… taxonomy holds. Winsock +errors (`WSAE*`) pass through as errno values ≥ 10000. The +`errno` module gains the `WSAE*` constant family on all platforms +(CPython ships them Windows-only; WeavePy gates them the same way). +The half-wired `winerror` slot in `builtin_types.rs` (constructor +currently forces `None`) is completed: the 4-arg `OSError` +constructor form performs the winerror→errno mapping exactly like +`oserror_parse_args`. + +**Signals.** `signal_mod.rs`'s Windows no-ops become real: +`install_startup_dispositions` registers a `SetConsoleCtrlHandler` +trampoline mapping `CTRL_C_EVENT`→`SIGINT` and +`CTRL_BREAK_EVENT`→`SIGBREAK` onto the existing atomic trip + +wakeup mechanism (the wakeup write goes through the CRT fd or +socket per `signal.set_wakeup_fd` semantics); `raise_signal` calls +CRT `raise`; `SIGBREAK` joins the constant set; `set_os_disposition` +installs CRT `signal()` handlers for the C90 set so +`signal.SIG_IGN` semantics hold. + +**sys/os surface.** `sys.getwindowsversion()` (a structseq over +`RtlGetVersion`, with `platform_version` from the same source), +`sys.winver = "3.13"`, `sys.dllhandle = 0` (no python DLL — see +Non-goals), `sys._enablelegacywindowsfsencoding` as a no-op +(filesystem encoding is always UTF-8, matching PEP 529 defaults). +`os` gains the NT-only names portable code probes for: +`os.startfile` (ShellExecuteW), `os.get_terminal_size` via console +API, `os.getlogin` via `GetUserNameW`, `os.urandom` via +`BCryptGenRandom` (replacing any `/dev/urandom` assumption), +`os.cpu_count` via `GetActiveProcessorCount`, `O_BINARY`/`O_TEXT`/ +`O_NOINHERIT`/`O_TEMPORARY`/`O_SHORT_LIVED`/`O_SEQUENTIAL`/ +`O_RANDOM` constants, and the `nt._path_splitroot_ex` / +`nt._path_normpath` fast paths `ntpath` probes (fallbacks exist, so +these are speed, not correctness). `os.environ` becomes +case-insensitive-key on Windows at the Rust layer (CPython upcases +in `nt`); `os.listdir`/`scandir`/`stat` already route through +`std::fs` and inherit Windows support, but `stat` results gain +`st_file_attributes` and the reparse-point `st_mode` shaping CPython +applies. + +**Truthful inventories.** `fcntl` registration moves behind +`#[cfg(unix)]` (joining `termios`/`resource`); `_posixsubprocess` +and `_posixshmem` likewise. `sys.builtin_module_names` is rebuilt +from the actual registration table at `register_all` time instead +of the stale hardcoded tuple, so the Windows build advertises +`_winapi`/`msvcrt`/`winreg`/`nt` (as CPython does) and never +advertises absent POSIX modules. The frozen `nt_mod.py` shim stays +(the architecture keeps Rust-`os`-as-owner) but its stub surface +(`_getdiskusage` via `GetDiskFreeSpaceExW`, +`_supports_virtual_terminal` via console-mode probe) becomes real. + +### WS2 — `_winapi` and `msvcrt`: the process/handle core + +`crates/weavepy-vm/src/stdlib/winapi_mod.rs`, registered as +`_winapi` under `#[cfg(windows)]`. The full CPython 3.13 surface the +frozen stdlib consumes: + +- Process: `CreateProcess` (UTF-16 command line, environment block + construction with the sorted-uppercase-key contract, + `STARTUPINFOW` incl. `hStdInput`/`hStdOutput`/`hStdError` and + `lpAttributeList` handle lists), `OpenProcess`, + `TerminateProcess`, `GetExitCodeProcess`, `GetCurrentProcess`, + `ExitProcess`, `GetModuleFileName`. +- Handles: a `HANDLE`-wrapping int subclass with `Close()`/ + `Detach()` (CPython's `_winapi` returns plain ints from most APIs + and the `Handle` class from `CreatePipe` consumers in + `subprocess`; WeavePy matches the observable shapes), + `DuplicateHandle`, `CloseHandle`, `GetStdHandle`, + `SetStdHandle`, `GetHandleInformation`/`SetHandleInformation`. +- Pipes and files: `CreatePipe`, `CreateNamedPipe`, + `ConnectNamedPipe` (sync + overlapped), `WaitNamedPipe`, + `PeekNamedPipe`, `SetNamedPipeHandleState`, `CreateFile`, + `ReadFile`/`WriteFile` (sync + overlapped via the module's own + `Overlapped` helper), `CreateJunction` (reparse-point write, used + by `test_os`/pip). +- Sync: `WaitForSingleObject`, `WaitForMultipleObjects`, + `CreateEventW`/`OpenEventW`/`SetEvent`/`ResetEvent`, + `CreateMutexW`/`OpenMutexW`/`ReleaseMutex`, `CreateFileMapping`/ + `OpenFileMapping`/`MapViewOfFile`/`UnmapViewOfFile`/ + `VirtualQuerySize` (the `_multiprocessing.shared_memory` NT + backend rides these). +- Misc: `GetLastError`, `GetACP`, `GetFileType`, + `GetVersion`, `NeedCurrentDirectoryForExePath`, + `CopyFile2` (used by `shutil`'s fast copy path — un-stubbing the + `_winapi = None` patch in the frozen `shutil.py`), `LCMapStringEx` + (`ntpath.normcase` fast path), and the full constant family + (`STARTF_*`, `CREATE_*`, `DUPLICATE_*`, `FILE_*`, `PIPE_*`, + `WAIT_*`, `INFINITE`, `NULL`, `SW_HIDE`, …). + +All blocking waits (`WaitFor*`, `ConnectNamedPipe`, blocking +`ReadFile`/`WriteFile`) release the GIL through the same +`blocking_region` mechanism the socket layer uses. + +`crates/weavepy-vm/src/stdlib/msvcrt_mod.rs`, registered as +`msvcrt`: `get_osfhandle`/`open_osfhandle` (the WS1 bridge, exposed), +`setmode`, `locking` (+ `LK_*` constants), `get_error_mode`/ +`SetErrorMode` constants, `heapmin`, and the console family +(`kbhit`, `getch`/`getche`/`getwch`/`getwche`, `putch`/`putwch`, +`ungetch`/`ungetwch`) over the console CRT. + +**Subprocess.** The frozen `subprocess.py` gains its Windows arm: +`_mswindows` path drives `_winapi.CreateProcess` with +`STARTUPINFO`, handle inheritance lists, `CREATE_NEW_CONSOLE`/ +`CREATE_NEW_PROCESS_GROUP` flags, and `Handle.wait` via +`_winapi.WaitForSingleObject` — replacing the portable +`_subprocess.spawn` fallback on Windows (which stays as the +non-POSIX-non-NT fallback). `Popen.send_signal(CTRL_BREAK_EVENT)` +works via `GenerateConsoleCtrlEvent`. + +**Multiprocessing.** `_multiprocessing`'s `#[cfg(unix)]` SemLock +gains an NT twin over `CreateSemaphoreW`/`ReleaseSemaphore`/ +`WaitForSingleObjectEx` (recursive-mutex emulation identical to +CPython's `win32` branch in `semaphore.c`, including +`WaitForMultipleObjects` on the sigint event for main-thread +acquires). The frozen `connection.py`/`reduction.py`/ +`popen_spawn_win32.py` Windows branches — already shipped — start +importing cleanly against the real `_winapi` + `msvcrt`; `Pipe()` +on NT uses `CreateNamedPipe` per CPython. `spawn` becomes the +default and only start method on Windows (as in CPython); +`_posixshmem` stays POSIX-gated with shared memory on NT routed +through `_winapi.CreateFileMapping`. + +### WS3 — `winreg`, codecs, and platform identity + +`crates/weavepy-vm/src/stdlib/winreg_mod.rs`, registered as +`winreg`: the `PyHKEY` type (int-comparable, context manager, +`Close`/`Detach`, `__bool__`), the full function surface +(`OpenKey(Ex)`, `CreateKey(Ex)`, `DeleteKey(Ex)`, `DeleteValue`, +`EnumKey`, `EnumValue`, `QueryInfoKey`, `QueryValue(Ex)`, +`SetValue(Ex)`, `ConnectRegistry`, `FlushKey`, `LoadKey`, `SaveKey`, +`Disable/Enable/QueryReflectionKey`, `ExpandEnvironmentStrings`), +value marshalling for every `REG_*` type per CPython's `Reg2Py`/ +`Py2Reg` (UTF-16 strings, `REG_MULTI_SZ` double-NUL lists, +`REG_DWORD`/`QWORD` little-endian ints, `None`→`REG_NONE`), and the +`HKEY_*`/`KEY_*`/`REG_*` constants. `platform.win32_ver()` then +works out of the box through its existing winreg fallback (no `_wmi` +— see Non-goals). + +**Codecs.** Native `codecs.code_page_encode`/`code_page_decode` over +`MultiByteToWideChar`/`WideCharToMultiByte` (with the exact CPython +error-handler contract: `strict` surfaces `UnicodeEncodeError` with +the failing span; `replace` uses the API's default-char path), plus +`mbcs_encode`/`mbcs_decode` (CP_ACP) and the `oem` pair (CP_OEMCP). +The frozen `encodings/mbcs.py` and `encodings/oem.py` are adopted +verbatim from CPython 3.13 and registered (import-gated on win32 +like CPython's package does naturally via the codec search +function). The `cp932`/`cp949`/`cp950` CJK pages already have native +tables from RFC 0050's CJK work and need only alias wiring. + +### WS4 — sockets, `select`, and IOCP asyncio + +**Winsock init.** `_socket` import on Windows performs `WSAStartup` +once (module-level, like CPython), not lazily inside `getservbyname`. + +**`select.select` on Windows.** The non-unix stub is replaced by a +real Winsock `select()` over `fd_set`s built from SOCKETs (with +CPython's semantics: non-socket values raise, empty-lists + +timeout sleeps, `[], [], []` on timeout). `selectors.DefaultSelector` +then resolves to `SelectSelector` exactly as CPython does on +Windows. `select.poll`/`epoll`/`kqueue` stay absent on NT (truthful +`hasattr` signals). + +**Socket residuals.** The `accept`-timeout wait (a `libc::poll` path +today) gains a Winsock twin (`select` on the one SOCKET); +`getaddrinfo`/`getnameinfo` route through Winsock's own +`GetAddrInfoW`/`GetNameInfoW` (replacing the `ToSocketAddrs` +approximation, restoring `AI_PASSIVE`/`AI_CANONNAME` fidelity); +inheritable get/set via `SetHandleInformation`; `socket.socketpair` +comes from the frozen `socket.py` loopback emulation CPython also +uses. Winsock call failures map through `WSAGetLastError` into the +WS1 error model. + +**`_overlapped`.** `crates/weavepy-vm/src/stdlib/overlapped_mod.rs`, +registered under `#[cfg(windows)]`: `CreateIoCompletionPort`, +`GetQueuedCompletionStatus` (GIL-released), +`PostQueuedCompletionStatus`, `CreateEvent`/`SetEvent`/`ResetEvent`, +`RegisterWaitWithQueue`/`UnregisterWait(Ex)` (thread-pool wait +packets), `BindLocal`, `WSAConnect`, and the `Overlapped` type with +its full method set — `ReadFile`/`ReadFileInto`, `WriteFile`, +`WSARecv`/`WSARecvInto`, `WSASend`, `AcceptEx` (+ +`GetAcceptExSockaddrs` address parsing), `ConnectEx`, +`DisconnectEx`, `TransmitFile`, `ConnectNamedPipe`, `cancel`, +`getresult(wait)`, `pending`/`address`/`error` — the extension +functions loaded once via `WSAIoctl(SIO_GET_EXTENSION_FUNCTION_ +POINTER)` per CPython. Buffer ownership follows CPython's rule: the +`Overlapped` object pins its buffer until completion or cancellation +drain, so the VM never frees memory the kernel still owns. + +With `_overlapped`, `_winapi`, and `msvcrt` live, the frozen +`asyncio/windows_events.py` + `windows_utils.py` import cleanly and +`ProactorEventLoop` becomes the Windows default policy exactly as +frozen; `SelectorEventLoop` works over WS4's `select` as the +alternative, and asyncio subprocess support rides the WS2 +`subprocess` arm. + +### WS5 — ctypes: the Win64 call gate + +`ctypes_native/ffi/native.rs` grows the `windows + x86_64` arm: +`SUPPORTED = true`, a Win64-ABI call gate (RCX/RDX/R8/R9 + XMM0–3 +with the shadow-space and by-reference-aggregate rules — one +convention, so `FUNCFLAG_STDCALL` is accepted and ignored as on +CPython Win64), and closure trampolines for callbacks. The loader +goes wide (`LoadLibraryW`, default `LOAD_WITH_ALTERED_SEARCH_PATH` +semantics matching CPython's `CDLL(winmode=...)` default); +`last_dlerror` uses `FormatMessageW`. The frozen `_ctypes` gains +`FormatError`, `get_last_error`/`set_last_error` backed by a native +thread-local that the call gate swaps around foreign calls when +`use_last_error=True`, `_check_HRESULT`, and `CopyComPointer` as a +stub. `ctypes.wintypes`, `WinDLL`/`windll`/`oledll`, and `WinError` +already exist in the frozen layer and light up. aarch64-windows is +explicitly out (build works, `SUPPORTED=false`, like today's +non-x86_64 story). + +### WS6 — distribution: the zip artifact and the NT prefix + +**Layout.** The Windows artifact adopts the CPython convention at +the root while keeping WeavePy's landmark: + +```text +weavepy-+g-x86_64-pc-windows-msvc/ +├── python.exe # copies of the release binary +├── python3.exe +├── weavepy.exe +├── lib/ +│ └── weavepy3.13/ # the landmark tree (unchanged name — +│ ├── .weavepy-complete # the walk finds it from the exe's +│ └── site-packages/ # own directory = the prefix) +├── include/ +│ └── python3.13/ +├── README.md +└── LICENSE-{APACHE,MIT} +``` + +The exe sits at the prefix root (so `resolve()`'s ancestor walk +finds `{prefix}/lib/weavepy3.13` from the first parent — no code +change needed), there is no `bin/`, and no symlinks exist anywhere +in the artifact. `weavepy-dist` gains `--format zip` (default on +Windows; `tar -a -cf` — bsdtar ships on the GitHub runners and +autodetects zip from the extension) and the `check` matrix learns +the NT shape: `python3.exe` at the root, venv leg at +`venv\Scripts\python.exe`, cext leg SKIP (see Non-goals), all other +legs identical. + +**Venv.** The frozen `venv` package's Windows branch expects +`venvlauncher.exe` assets CPython builds; WeavePy patches +`setup_python`'s win32 arm to copy `sys._base_executable` itself as +`Scripts\python.exe` (the python-build-standalone approach — a real +copy, no launcher indirection, works because the landmark walk +chases `pyvenv.cfg` `home=` already). `DATA_FILES` gains +`venv/scripts/nt/activate.bat` + `deactivate.bat` (adopted from +CPython 3.13; `Activate.ps1` is already in `common`). + +**sysconfig.** The frozen `nt`/`nt_venv` schemes get +WeavePy-truthful paths (`stdlib`/`platstdlib` → +`{installed_base}/lib/weavepy3.13`, `purelib`/`platlib` → +`{base}/lib/weavepy3.13/site-packages` for the prefix scheme and +`{base}/Lib/site-packages` for venvs per CPython, `scripts` → +`{base}/Scripts`, `include` → `{installed_base}/include/python3.13`) +— the same divergence-with-documentation policy the POSIX scheme +took in RFC 0053. `sysconfig_native` already reports +`EXT_SUFFIX=.cp313-win_amd64.pyd`; it gains truthful `nt` values for +the query surface pip touches (`get_platform() == "win-amd64"`, +`VERSION_NODOT`, `EXE=".exe"`). The materializer writes the stub +`pyconfig.h` on Windows still (C builds are out — Non-goals) and +skips the POSIX `lib/python3.13` symlink. + +### WS7 — measurement: CI lanes and the advisory-until-measured gate + +**The blocking gate that lands with the wave**: the existing +`windows-latest` `test` job, grown with Windows-gated integration +tests under `crates/weavepy/tests/` (running Python source through +the embedding API) and per-module Rust unit tests: CRT fd round-trip +(`os.pipe`→`os.write`→`os.read`→`msvcrt.get_osfhandle`), `_winapi` +anonymous + named pipe echo through `CreateProcess` of the test +binary itself, `winreg` HKCU round-trip under a scratch subkey +(created and deleted per test), `select.select` over a loopback +socket pair, `_overlapped` IOCP read/write completion against +loopback sockets and `ConnectNamedPipe`, ctypes calling +`kernel32.GetTickCount64` + a callback trampoline, `mbcs` codec +round-trips, `subprocess.run` capture, a `multiprocessing` spawn +Pool map, and an asyncio proactor echo server. These are real +Windows executions, gating every PR, from this wave forward. + +**New CI lanes (advisory)**: `regrtest`, `ecosystem` (wheels fetched +on the runner), `bench`, and `dist-check` each gain a +`windows-latest` matrix leg. Regrtest and ecosystem gain the +mechanism RFC 0062's bench lane already has: the expectations files +carry a `measured_os = ["macos", "linux"]` stamp; on a host OS not +in the stamp, `--check` prints the full divergence report, uploads +the measured result TOML as an artifact, and exits 0 (advisory). +Bench runs `--allow-missing-baseline` (existing behavior). The +first follow-up commit after the wave transplants the CI-measured +artifacts into `status_windows`/`reason_windows` rows + a +`bench-windows-x86_64.json` baseline and adds `"windows"` to the +stamps, flipping all four lanes to blocking — the exact +mechanism-then-measurement two-step RFC 0062 used for Linux bench, +now formalized in the expectations format instead of a CI flag. + +Rows known-divergent by construction get seeded +`status_windows`/`reason_windows` entries in this wave (measured +skips, not guesses): the POSIX-only files CPython itself skips on +Windows (`test_fcntl`, `test_posix`, `test_pty`, `test_grp`/ +`test_pwd`, `test_ioctl`, …) carry `status_windows = "skip"` with +CPython's own skip reason. + +### Non-goals + +- **C extensions on Windows.** Loading `.pyd`s built for CPython + requires a `python313.dll` for the PE import to resolve against — + WeavePy is a static executable, and the honest fix (restructuring + the workspace so a `python313.dll` cdylib exports the C-API and + the exe links it) is its own wave. `EXT_SUFFIX` stays truthful, + `ExtensionFileLoader` reports a clear error, ecosystem rows + needing binary wheels get measured `status_windows = "fail"` rows. + This is the wave after this one, and the RFC-0062 header work is + its prerequisite on the build side. +- **Console Unicode fidelity (`_WindowsConsoleIO`).** Piped and + redirected streams — everything CI and tooling see — go through + the regular fd path landed here. Interactive-console + `ReadConsoleW`/`WriteConsoleW` IO is deferred; `sys.stdout` on a + console is UTF-8 CRT IO meanwhile. +- **`_wmi`, `winsound`, `msilib`**, the `py.exe` launcher, MSI/Store + installers, `WindowsRegistryFinder` (deprecated in CPython, never + default-active), and aarch64-windows ctypes calls. +- **Measured-blocking Windows lanes in this same commit** — the + lanes land advisory with the stamp mechanism; flipping requires + CI-measured artifacts by definition (see WS7). + +### Acceptance criteria + +1. **Windows compiles and self-tests green, blocking**: `cargo build + --target x86_64-pc-windows-msvc -p weavepy-vm -p weavepy-cli` + clean; the `windows-latest` `test` job — including every new + Windows-gated integration test in WS7's list — passes and gates + the PR. +2. **No POSIX regression**: regrtest `unexpected 0`, ecosystem 31/31 + + selftests, bench gate, and `weavepy-dist check` all green on + macOS (and ubuntu in CI), unchanged baselines. +3. **The quartet is real**: `_winapi`, `msvcrt`, `winreg`, + `_overlapped` register on Windows with the surfaces enumerated + above; `import asyncio`, `import multiprocessing`, `import + subprocess`, `import shutil`, `import ctypes` succeed on Windows + with their Windows arms active (proven by the WS7 tests). +4. **Truthful signals**: `import fcntl`/`termios`/`resource`/`pwd`/ + `grp` raise `ModuleNotFoundError` on Windows; + `sys.builtin_module_names` reflects the real registration table + on every OS; `OSError.winerror` is populated from real Win32 + failures. +5. **The artifact exists**: `weavepy-dist build --format zip` on + Windows produces the NT layout; `weavepy-dist check` passes its + matrix (minus the cext SKIP) on the `windows-latest` dist-check + lane. +6. **The measurement machinery lands**: `measured_os` stamps parse + (with tests), the four Windows CI lanes run and upload measured + artifacts, and known-POSIX-only rows carry seeded + `status_windows` skips. +7. **All gates green on macOS**: `cargo fmt`, `clippy -D warnings`, + `cargo test --workspace`, `regrtest --check`, + `ecosystem --check`, `weavepy-dist check`. + +## Drawbacks + +- **A second syscall dialect forever.** Every future fd-touching + feature now has an NT arm to keep honest; the `windows-sys` + surface is `unsafe` FFI in exactly the layer RFC goals want + `unsafe` confined. Mitigation: the CRT/Win32 calls are localized + in the new modules + the WS1 bridge, mirroring how `libc::` is + already localized. +- **Cross-compiled confidence has limits.** The wave is developed on + macOS; `cargo build --target windows-msvc` proves compilation, and + the CI tests prove behavior — but iteration on a Windows-only + failure is a CI round-trip. The WS7 test batteries are deliberately + fine-grained so failures localize. +- **Advisory lanes can rot if the follow-up stalls.** An advisory + regrtest lane nobody baselines is RFC 0062's "unfalsifiable" + problem in new clothes. Mitigation: the flip-to-blocking follow-up + is named in the acceptance story, and the artifact upload makes the + baseline a copy-paste, not a project. +- **The Win64 asm call gate is high-risk code** reviewed without + local execution. Mitigation: it is the same shape as the existing + SysV gates, the ABI is simpler (four register slots), and the CI + test calls through it with argument patterns covering int/float/ + aggregate/callback cases. + +## Alternatives + +- **HANDLE-native fd model** (return HANDLEs from `fileno()`, + skip the CRT): rejected — every consumer contract breaks + (`msvcrt.get_osfhandle(sys.stdout.fileno())` is real-world code; + `os.close` on a HANDLE double-frees when CRT-backed files exist), + and CPython's model costs one `_open_osfhandle` per open. +- **Adopt CPython's `os.py` + a native `nt` module** (invert the + ownership to CPython's architecture): rejected for this wave — + WeavePy's Rust-`os`-owns model is load-bearing for every platform + (the frozen `posix`/`nt` shims re-export it), and flipping the + ownership is a cross-platform refactor with no user-visible gain; + the shim approach reaches the same importable surface. +- **SelectorEventLoop as the Windows asyncio default** (skip + `_overlapped`): rejected — CPython 3.13's default is Proactor; + libraries probe the loop class and subprocess support requires it; + shipping the non-default loop is a behavior divergence exactly + where "drop-in" claims live. +- **libffi for the Win64 gate** instead of extending the hand-rolled + one: rejected — the project already owns SysV gates and a second + FFI backend for one ABI adds a C build dependency the workspace + deliberately avoids. +- **`Lib\` at the artifact root (full CPython layout)** instead of + keeping `lib/weavepy3.13`: rejected — the landmark walk, the + materializer, venv resolution, and the POSIX artifact all share + one layout constant; a per-OS stdlib directory name buys cosmetic + similarity and costs a second identity to test. The exe-at-root + and `Scripts\` conventions are kept because *code* (venv, pip, + sysconfig schemes) observes them. +- **Waiting for the python313.dll wave and doing C extensions + simultaneously**: rejected — the pure-Python drop-in story + (stdlib + pip + venv + asyncio + multiprocessing) is + independently shippable and independently measurable, and the DLL + restructure is lower-risk once the runtime beneath it is proven. + +## Prior art + +- **CPython's own NT port** (`Modules/posixmodule.c`, `PC/`): the + CRT-fd model, errmap, and console-ctrl-handler design are + transcribed, not reinvented. +- **PyPy on Windows**: reimplemented the same quartet + (`_winapi` in RPython) and documented that proactor-asyncio and + multiprocessing were unusable until `_overlapped` landed — + evidence for including it in the first wave. +- **python-build-standalone**: ships CPython for Windows with + venv-copies-the-exe (no launcher), validating WS6's venv approach. +- **Rust ecosystem**: `windows-sys` is the Microsoft-maintained + binding crate used by std itself; `socket2` (already a dependency) + is Windows-clean, which is why sockets are the most portable + module today. +- **RustPython**: has a partial `_winapi`/`winreg`; its issue + tracker's recurring Windows-fd bugs (HANDLE/fd confusion in mmap + and subprocess) are the cautionary tale WS1's single-owner CRT + rule is designed against. + +## Unresolved questions + +- Whether `os.pipe` fds should default non-inheritable via + `O_NOINHERIT` at `_pipe` time or via `SetHandleInformation` after + (CPython does the latter; behaviorally identical, decided at + implementation). +- Whether the `measured_os` stamp belongs in `expectations.toml` or + a sibling file — this RFC puts it in the header of the same file + (one source of truth), matching the `timeout_seconds` precedent. +- How much of `test_winreg`/`test_winapi`'s surface the first + measured Windows baseline can claim — answered by the first CI + sweep, by design. + +## Future work + +- **The `python313.dll` wave**: restructure so the C-API exports + live in a cdylib the exe links; binary wheels (numpy et al.) and + `pip install` of C sdists via MSVC vars then follow — the Windows + twin of RFC 0062's WS2. +- `_WindowsConsoleIO` for interactive-console Unicode fidelity. +- The flip-to-blocking baseline commit (measured + `status_windows` rows, `bench-windows-x86_64.json`, + `measured_os += ["windows"]`) — first follow-up after this wave. +- aarch64-windows ctypes call gate; ARM64 runner lanes when GitHub + offers them. +- `py.exe`-style launcher behaviors, Start-menu/installer UX, + code signing. +- `os.add_dll_directory` + DLL search-path hardening once the DLL + wave exists. + +## Results + +*(To be filled in at landing, per repo convention: measured CI +outcomes for the Windows test battery, the advisory-lane first +sweeps, and the unchanged macOS/Linux baselines.)* diff --git a/tests/ecosystem/expectations.toml b/tests/ecosystem/expectations.toml index e7016361..c8a273fb 100644 --- a/tests/ecosystem/expectations.toml +++ b/tests/ecosystem/expectations.toml @@ -17,6 +17,17 @@ # # `notes` is free-form context for humans. The runner exits non-zero on # any status that differs from this file (unless --no-check). +# +# measured_os stamp (RFC 0063 WS7): the top-level list below names the +# OSes (std::env::consts::OS spelling, same as the suffix keys) whose +# rows are *measured* baselines. On a host OS not in the stamp, --check +# still prints the full report and writes results, but unexpected rows +# only emit an advisory NOTE and exit 0 — the gate stays advisory until +# a CI-measured Windows baseline is transplanted into status_windows +# rows and "windows" joins the stamp, flipping the lane to blocking. A +# missing stamp means "all OSes measured" (pre-RFC-0063 behaviour). + +measured_os = ["macos", "linux"] [packages.six] status = "pass" diff --git a/tests/ecosystem/manifest.toml b/tests/ecosystem/manifest.toml index a777c837..596bf95a 100644 --- a/tests/ecosystem/manifest.toml +++ b/tests/ecosystem/manifest.toml @@ -42,7 +42,10 @@ probe = "probes/attrs_probe.py" [packages.attrs.selftest] source = "attrs==26.1.0" -requirements = "pytest==8.4.2 hypothesis==6.165.2" +# hypothesis repinned 6.165.2 -> 6.155.7 (2026-08): 6.165.2 was removed +# from PyPI, which cold wheel caches (e.g. the new Windows CI lane) +# surface as a resolution error; warm POSIX caches masked it. +requirements = "pytest==8.4.2 hypothesis==6.155.7" # Measured 2026-08: the suite cannot finish inside any sane budget — # hypothesis @given loops woven through the core files (test_make, # test_funcs, test_dunders) are interpreter-speed-bound under WeavePy @@ -129,7 +132,7 @@ source = "python-dateutil==2.9.0.post0" # -W: tests/conftest.py applies pytest-cov's `no_cover` marker; without # the plugin the unknown-mark warning would be escalated to an error by # the suite's `filterwarnings = error` (cmdline -W outranks ini). -requirements = "pytest==8.3.5 six==1.17.0 hypothesis==6.165.2 freezegun==1.5.5" +requirements = "pytest==8.3.5 six==1.17.0 hypothesis==6.155.7 freezegun==1.5.5" command = "tests -W ignore::pytest.PytestUnknownMarkWarning" # Engine gap (hypothesis-found, measured 2026-08: 2030 passed, 1 # failed): for pre-epoch datetimes (e.g. 1901-12-13T12:45:52Z), @@ -151,7 +154,7 @@ probe = "probes/packaging_probe.py" [packages.packaging.selftest] source = "packaging==26.3" -requirements = "pytest==8.4.2 pretend==1.0.9 hypothesis==6.165.2 tomli_w==1.2.0" +requirements = "pytest==8.4.2 pretend==1.0.9 hypothesis==6.155.7 tomli_w==1.2.0" # Two enumerated trims, both interpreter-speed-bound (measured # 2026-08), neither a correctness signal: # --ignore=tests/property — upstream's hypothesis property-fuzz lanes diff --git a/tests/regrtest/expectations.toml b/tests/regrtest/expectations.toml index 0c924ba5..44fb834c 100644 --- a/tests/regrtest/expectations.toml +++ b/tests/regrtest/expectations.toml @@ -38,6 +38,20 @@ # load time `_` wins over the plain ``; the base # `status` stays mandatory, and an unrecognized suffix on one of these # keys (e.g. `status_ubuntu`) is a hard load error. +# +# RFC 0063 (Windows wave, WS7) added the top-level `measured_os` stamp +# below: the list of OSes (same std::env::consts::OS spelling as the +# suffix keys) whose rows are *measured* baselines. On a host OS not in +# the stamp, `--check` still prints the full report and writes results, +# but unexpected results only emit an advisory NOTE and exit 0 — the +# gate stays advisory until a CI-measured baseline for that OS is +# transplanted into `status_` rows and the OS name is added to the +# stamp, flipping the lane to blocking. A missing stamp means "all OSes +# measured" (pre-RFC-0063 behaviour). Windows rows seeded in this wave +# are limited to files that are POSIX-only by construction (CPython +# itself skips them on NT); everything else gets measured by CI first. + +measured_os = ["macos", "linux"] timeout_seconds = 60 @@ -484,6 +498,8 @@ reason = "measured (RFC 0057 WS10): full suite OK — fatal-signal re-raise forc [tests."cpython/Lib/test/test_fcntl.py"] status = "pass" reason = "measured (RFC 0040 WS1): passes end-to-end (12 run, 4 skip). The `test_lockf_{exclusive,share}` cases drive a `multiprocessing.get_context('spawn')` child that unpickles the test function from `test.test_fcntl`; they were failing because the spawn child rebinds `sys.path` in `spawn.prepare()` (`sys.path = data['sys_path']`) and WeavePy's import loader read a stale cached path snapshot. The loader now consults the live `sys.modules['sys'].path` (CPython-faithful), so the child resolves on-disk submodules and the lockf BlockingIOError round-trips." +status_windows = "skip" +reason_windows = "POSIX-only module (no fcntl on Windows); CPython skips this file on NT (RFC 0063 seeded skip)." [tests."cpython/Lib/test/test_file_eintr.py"] status = "fail" @@ -516,6 +532,8 @@ reason = "measured (RFC 0038 WS-B): passes end-to-end (frozen `fnmatch` over the [tests."cpython/Lib/test/test_fork1.py"] status = "fail" reason = "measured (RFC 0049 wave-5 full-suite baseline): AssertionError: process 57266 exited with code 1, but exit code 42 is expected" +status_windows = "skip" +reason_windows = "POSIX-only (os.fork does not exist on Windows); CPython skips this file on NT (RFC 0063 seeded skip)." [tests."cpython/Lib/test/test_format.py"] status = "pass" @@ -677,6 +695,8 @@ reason = "measured (RFC 0040 WS7 — acceptance bar met): passes end-to-end — [tests."cpython/Lib/test/test_ioctl.py"] status = "pass" reason = "measured (RFC 0055 WS6): os.openpty unlocked the pty-backed legs; fcntl.ioctl masks a negative code to its 32-bit pattern like CPython's bitwise unsigned-int converter." +status_windows = "skip" +reason_windows = "POSIX-only (fcntl.ioctl over pty/termios fds; no fcntl on Windows); CPython skips this file on NT (RFC 0063 seeded skip)." [tests."cpython/Lib/test/test_ipaddress.py"] status = "pass" @@ -713,6 +733,8 @@ reason = "RFC 0037: added the missing arg-syntax SyntaxErrors (duplicate paramet [tests."cpython/Lib/test/test_kqueue.py"] status = "pass" reason = "RFC 0039 WS6: native libc-backed select.kqueue/kevent" +status_windows = "skip" +reason_windows = "BSD-only kernel queue (select.kqueue never exists on Windows); CPython skips this file on NT (RFC 0063 seeded skip)." [tests."cpython/Lib/test/test_linecache.py"] status = "pass" @@ -800,6 +822,8 @@ reason = "RFC 0050 WS3: passes (36 tests, 1 cpython_only skip). Frozen _multibyt [tests."cpython/Lib/test/test_multiprocessing_fork.py"] status = "skip" reason = "measured (RFC 0040 WS5): faithful skip — CPython's own `test_multiprocessing_fork/__init__.py` raises `unittest.SkipTest(\"test may crash on macOS (bpo-33725)\")` at import on `sys.platform == 'darwin'`, and WeavePy reproduces that skip identically (verified: the module raises the same SkipTest on this macOS host). `fork` in a threaded runtime is documented-unsafe (the RFC Non-goals and CPython both gate it off here); the `spawn` and `forkserver` variants — the default/safe paths that share the entire `multiprocessing` package + `_multiprocessing` core — both pass end-to-end (413 run, 0F/0E). On a Linux grading host the `fork` start method runs the same package over the RFC 0025 shared-`Arc` heap clone; the macOS skip is the CPython-matching outcome here." +status_windows = "skip" +reason_windows = "POSIX-only start method (the fork start method does not exist on Windows — spawn is the only NT start method); CPython skips this file on NT (RFC 0063 seeded skip)." [tests."cpython/Lib/test/test_multiprocessing_forkserver.py"] status = "pass" @@ -918,6 +942,8 @@ reason = "measured (RFC 0057 WS10): 28 tests OK — the posonly-as-keyword TypeE [tests."cpython/Lib/test/test_posix.py"] status = "pass" reason = "RFC 0040 WS1/WS4: passes in the canonical subprocess mode (178 run, 0F/0E, 99 skip). Landed: os.pipe2 honouring O_NONBLOCK/O_CLOEXEC via host libc O_* values (macOS differs from Linux), signal.raise_signal delivering real signals unconditionally (setsigdef kills the child), posix_spawn setsigmask preserved by capturing+restoring the inherited signal mask on the VM thread, and a pre-main C constructor (proc_init) that re-closes any inherited-closed standard fd the Rust runtime's sanitize_standard_fds reopened to /dev/null (test_close_file)." +status_windows = "skip" +reason_windows = "POSIX-only module (no posix module on Windows — os routes through nt); CPython skips this file on NT (RFC 0063 seeded skip)." [tests."cpython/Lib/test/test_posixpath.py"] status = "pass" @@ -951,6 +977,8 @@ reason = "measured (RFC 0053 WS5): verbatim `pstats.py` (SortKey enum, `stream=` [tests."cpython/Lib/test/test_pty.py"] status = "pass" reason = "measured (RFC 0055 WS6): native termios + os.openpty/os.login_tty — pty.fork(), spawn, and the SmallPtyTests all pass." +status_windows = "skip" +reason_windows = "POSIX-only module (pty requires termios/os.openpty, neither exists on Windows); CPython skips this file on NT (RFC 0063 seeded skip)." [tests."cpython/Lib/test/test_pulldom.py"] status = "pass" @@ -1215,6 +1243,8 @@ reason = "measured (RFC 0040 WS7/WS8 + deterministic-finalization arc): passes e [tests."cpython/Lib/test/test_termios.py"] status = "pass" reason = "measured (RFC 0055 WS6): native termios builtin (tcgetattr/tcsetattr/tcdrain/tcflush/tcflow/winsize over libc) with CPython's error type and VMIN/VTIME int-vs-bytes cc semantics." +status_windows = "skip" +reason_windows = "POSIX-only module (no termios on Windows); CPython skips this file on NT (RFC 0063 seeded skip)." [tests."cpython/Lib/test/test_textwrap.py"] status = "pass" diff --git a/tools/ecosystem_fetch.py b/tools/ecosystem_fetch.py index 0f21e991..3c75c4c0 100644 --- a/tools/ecosystem_fetch.py +++ b/tools/ecosystem_fetch.py @@ -130,6 +130,16 @@ def main() -> int: plats = [f"macosx_11_0_{machine}", "macosx_10_9_universal2"] elif sys.platform.startswith("linux"): plats = [f"manylinux2014_{machine}", f"manylinux_2_17_{machine}"] + elif sys.platform == "win32": + # RFC 0063: the Windows CI lane. Without a binary platform tag, + # `--platform any` alone can't fetch compiled wheels (markupsafe, + # numpy, pydantic-core, ...). `platform.machine()` reports the + # WMI spelling (AMD64/ARM64), not the wheel-tag one. + plats = [ + {"AMD64": "win_amd64", "ARM64": "win_arm64", "x86": "win32"}.get( + machine, f"win_{machine.lower()}" + ) + ] else: plats = [] seen = set()