Merge upstream dev3 (261 commits): #1271 audit fixes, init/subproc restructure - #15

Merged

Jarred-Sumner merged 334 commits into

bun-dev3-v2from

claude/sync-dev3

Aug 13, 2026

This pull request is big! We're only showing the most recent 250 commits

Commits on Jul 31, 2026

fix wrong memcpy_aligned in aligned_at api, issue #1271 3.46
daanx
committed
130b77a
fix aliased mi_malloc_size/mi_malloc_usable_size
daanx
committed
8b7781a
merge from dev
daanx
committed
a066f73
dont stop theap visitor if the theap is empty, issue #1271 3.47
daanx
committed
7ba2c98
dont stop theap visitor if the heap is empty, issue #1271 3.47
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committed
cb28f2c
always call error_message on invalid alignments; always set errno on an allocation error
daanx
committed
f50fe32
merge from dev
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committed
aada87c
fix test for 32-bit
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committed
7401ae9
disable C++ new-handler test for now
daanx
committed
ced2b88
Merge branch 'dev' into dev3
daanx
committed
16a620f
fix UB in mi_ctz_generic32, issue #1271 3.102
daanx
committed
98328ce
fix return value of _mi_getenv on invalid parameters to ENOENT, issues #1271 3.97
daanx
committed
97b9c05
check strtol for errors, issue #1271 3.98
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committed
204c6cb
check for overlong environment values, issue #1271 3.98
daanx
committed
66b9380
revise mi_out_num to not truncate in reverse, issue #1271, 3.99
daanx
committed
29c698e
fix %-x,%-p formats, issue #1271 3.100
daanx
committed
d836fb3
use static format strings, issue #1271 3.101
daanx
committed
e8a8ca2
fix early break restore in _mi_bitmap_forall_setc_ranges, issue #1271 3.110
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committed
43862e1
fix debug arena's with NULL slots, issue #1271 3.106
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committed
586a6ca
fix debug array bound, issue #1271 3.107
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committed
33dd80f
fix assertion, issue #1271 3.109
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committed
00f6c6b
better recovery on contended bit claim, issue #1271 3.111
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committed
00699f4
remove unused atomic thread fence, issue #1271 3.119
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committed
6bae591
fix atomic MSVC signature, issue #1271 3.120
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committed
0b76d47
fix ifdefs for mi_mul_overflow, issue #1271 3.121
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committed
33d90fb
Merge branch 'dev' into dev3
daanx
committed
f4f65d3
guard against free list corruption in double-free check
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committed
ef3867f
clean up double free checks
daanx
committed
d9d8332
merge from dev
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committed
8c49477
merge from dev
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committed
856a68c
increase randomness of nonce in chacha split, issue #1271 3.49
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committed
838587c
Merge branch 'dev' into dev3
daanx
committed
d7cb7dd
clamp on-demand page commit to not extend into the guard page; limit on-demand commit to arena-slice sizes, issue #1271 3.50
daanx
committed
e8aa6cc
clamp debug free memset to DEBUG_FREED to 1MiB, issue #1271 3.52
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committed
4756dcc
merge from dev
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committed
d077de5
use atomic loads for stat_count_add_mt, issue #1271 3.65
daanx
committed
6d0c746
fix wrong segment .CRT to .CRT for x86, issue #1271 3.69
daanx
committed
da6af48
make windows TLS slot indices atomic, issue #1271, 3.62 3.63
daanx
committed
0b64242
add missing linker include for _mi_crt_callback_init, issue #1271, 3.70
daanx
committed
9c79ca3
check processinfo result on windows, issue #1271, 3.72
daanx
committed
490c664
ensure the windows large page size is always set, issue #1271, 3.73
daanx
committed
c6ed555
better error codes for enable_large_os_pages on windows, issue #1271, 3.74
daanx
committed
233a325
check all return values on windows, issue #1271, 3.75
daanx
committed
7f67ac0
check for __BMI__ as __BMI1__, issues #1271, 3.103 3.104
daanx
committed
60c12d8
increase minimal arena slice to 8KiB, issues #1271, 3.103 3.105
daanx
committed
37f1f55
add C11 _Alignas fallback, issues #1271, 3.103 3.123
daanx
committed
f563367
proper error codes for realpath on windows, issue #1271 3.124
daanx
committed
cb2e35e
zero chacha initial key on the stack after use, issue #1271 3.142
daanx
committed
c83b233
backport recent windows primitive fixes in dev3
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committed
78cc89d
allow build for universal windows platform. PR #1340 by @thexia
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committed
c9c86c7

Commits on Aug 1, 2026

use GetModuleHandle for ntdll, kernelbase, and kernel32 on windows
daanx
committed
97689b8
return large page size on windows
daanx
committed
dadf129
merge from dev
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committed
5febbe5
backport improved windows realpath
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committed
df1fdb4
fix warnings on msvc
daanx
committed
f2a55f4
punctuation, PR #1334 by @Helder-Magalheas
daanx
committed
a26d62c
add mingw windows support (by @zackees, see <https://github.com/zackees/mimalloc-pprof/issues/56>)
daanx
committed
60c4f03
Merge branch 'dev' into dev3
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committed
064deb1
Merge branch 'dev' of /Volumes/T9/dev/mimalloc into dev
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committed
230b721
remove v1/v2 mingw fix
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committed
1c2661a
merge from dev3
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committed
d036770
fix windows compilation
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committed
caafb37
set theap->heap after full initialization
daanx
committed
f75e2f3
use 20 bits for the version for thread locals on 32-bit
daanx
committed
b16b0e3
fix failure of GetStdHandle for error output on Windows, issue #1271 3.71
daanx
committed
f5dec97
fix type of SYS_getcpu, issues #1271 3.79
daanx
committed
ce579b6
fix TSAN failure on mi_stat_free
daanx
committed
bb92936
allow sparse nodes for numa_node_count on Linux, issue #1271 3.80
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committed
141df47
check rusage result value, issue #1271 3.81
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committed
1aa6f42
limit numa nodes for huge pages to 63, issue #1271 3.82
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committed
fb06476
add comment on using a monotonic clock on emscripten
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committed
8f14cd2
fix write to empty heap and add tests, improve issue #1271 3.6
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committed
f366690
merge from dev
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committed
dad4363
start huge OS page allocation in the 32TiB range, issue #1271 3.86
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committed
688922e
add error condition for a fixed TLS model without having tls slot access, issue #1271 3.87
daanx
committed
d40aac1
fix detection of truncated json output, issue #1271 3.90
daanx
committed
5b2b1dd
fix over-decremented commit stats on windows, issue #1271 3.91
daanx
committed
f0e7c5e
Merge branch 'dev' into dev3
daanx
committed
a4ddce7
guard against negative current/peak commit values, issue #1271 3.92
daanx
committed
470e71b
fix overcount of touched pages on initially nonzero managed memory, issue #1271 3.93
daanx
committed
a3876e1
decrement page stats on page_init failure, issue #1271 3.94
daanx
committed
f53da62
fix mi_heap_merge_to_main to use the heap subproc, issue #1271 3.96
daanx
committed
24a7b15
limit arena_max_object_size, issue #1271 3.114
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committed
f26715a
check overflow in claim_huge_pages, issue #1271 3.117
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committed
25d6dcf
comments
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committed
6f5c8a7
Merge branch 'dev' into dev3
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committed
7bb480c
comments
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committed
3399964
remove unused defs
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committed
53a4167
Merge branch 'dev' into dev3
daanx
committed
3bd90d4
remove unused definitions
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committed
6295435
change mi_decl_unused to mi_decl_maybe_unused
daanx
committed
4553ced
merge from dev3
daanx
committed
1b62a78
fix windows test
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committed
bcee5a8
Merge branch 'dev3' into dev3-meta
daanx
committed
d36b1ca
add debug output to test api
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committed
2687a69
fix debug format
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committed
344ee9f
use collect in test-api heap-os2
daanx
committed
1d993d3
update heap-os2
daanx
committed
9e6c0d9
fix error path on page_init fail for singleton pages, issue #1271 3.127
daanx
committed
b0ac42e
try to fix test heap-os2
daanx
committed
9bba203
use reserved for pages_full_size adjustment
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committed
1fb3456
update readme
daanx
committed
0e83035
bump version to 1.9.14
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committed
023fcc0
bump version to 1.9.14
daanx
committed
6c44fc9
bump version to 3.4.4
daanx
committed
f9a7412
update readme
daanx
committed
245abf1
Merge branch 'dev' into dev3
daanx
committed
d0733eb
update readme
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committed
9ce8170
Merge branch 'dev' into dev3
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committed
1f06f69

Commits on Aug 2, 2026

Merge branch 'dev3-meta' into dev3
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committed
0da523a
add -DMI_OPT_FREE_SMALL to cmake options
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committed
4792e0d
optimize mi_free_size to call mi_free_small for small sizes
daanx
committed
4b7c559
add constant size malloc/free inline definitions
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committed
d07a375
add constant size malloc/free inline definitions
daanx
committed
1002357
fix: bootstrap the library in mi_heap_new and mi_subproc_new

zackees
and
claude
committed
de80266
improve concurrent heap_delete and thread termination
daanx
committed
36e8fc3
fix mingw detection: __GCC__ -> __GNUC__ (see also PR #1349)
daanx
committed
b5fdee4
Merge pull request #1351 from zackees/pr/bootstrap-dev3
daanx
authored
10c2c3b
typo
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committed
8d56157
fix mingw detection: __GCC__ -> __GNUC__ (see also PR #1349)
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4cca633
shorten comment
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46fc774
merge from dev3
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2a2b18f
fix assertion
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c808493
fix mi_free_csize declaration
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committed
e1a4c7e
msvc build fixes
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committed
4d8548c

Commits on Aug 3, 2026

fix error condition in XMALLOC, PR #1353 by @mdionisio
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11e6853
make build deterministic, issue #1355
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committed
b7ee6b6
use direct WriteFile or console output on Windows, issue #1354
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committed
6724c03
ensure the full usable block size is zerod on reallocation, issue #763
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97e198c
merge from dev
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4d63eb7
ensure the full usable block size is zero'd on reallocation, issue #763
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11d655a
merge from dev
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committed
066a218
ensure the full usable block size is zero'd on reallocation, issue #763
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committed
591e889
merge from dev
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committed
435015e
improve rezalloc and rezalloc aligned, issue #763
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committed
9e27e1c
merge from dev
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committed
933b967
fix signature of mem_is_zero
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committed
36f2efe
fix signature of mem_is_zero
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committed
3b798c2
merge from dev
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committed
5acce4d
enable c++ tests
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5ed79fe
add AIX support, issue #764
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8810b23
fix c++ handler test
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8fc216b
Merge branch 'dev' into dev3
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committed
bbb118c

Commits on Aug 4, 2026

make page->used 32-bit (for better codegen on riscV); make slice_pcommitted 16-bit to fit in an initial bchunk with a max arena
daanx
committed
59378be
don't run c++ handler test on 32 bit windows
daanx
committed
a085261
Merge branch 'dev3' into dev3-meta
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1fb9075
change mi_page_t field order for better cache access
daanx
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3a436a1
Merge branch 'dev3' into dev3-meta
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b8b66c0
simplify TLS defines
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8bfcc4a
disable C++ handler check on windows
daanx
committed
c2e79bf
Merge branch 'dev3' into dev3-meta
daanx
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e1684d4
cast __builtin_thread_pointer
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4fb7441
fix __builtin_threadpointer cast
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7464d25
update test.yaml
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4d3d9a5
set usable parameter in guarded allocation
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55f12a9
merge from dev
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e09b142
refine useable size in mi_heap_realloc_zero
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86b4bb9
merge from dev
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c13362f
for realloc, use mi_usable_size if padding is enabled
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7413a8b
Merge branch 'dev' into dev3
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54e28b7
Merge branch 'dev3' into dev3-meta
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56fd32b
run mi_guarded tests with a sample rate of 1; use on demand page commit for heaps test
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96ce796
extend tests with page commit on demand
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efc9106
merge from dev3
daanx
committed
cd33ec7
fix usable return value for guarded allocations
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65dd388
merge from dev
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0b65627
Merge branch 'dev3' into dev3-meta
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10e79a7
fix heap_realloc with guarded pages
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6d545f7
Merge branch 'dev' into dev3
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5bf3c16
Merge branch 'dev3' into dev3-meta
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3e4084e
update test yaml
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048c1d6
update test yaml
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dc74f40
re-enable riscv64 tests
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e134447
return block_size from the umalloc api's (instead of usable)
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committed
c9b0b8d
improve umalloc and realloc efficiency
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427df0b
merge from dev (ppage instead pblock_size)
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dac2171
Merge branch 'dev3' into dev3-meta
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af5c418
compile without errors on mingw with ucrt64
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e721902
merge from dev (mingw64-ucrt64 compilation)
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0b52dc9
add minject step for dynamic redirect tests on mingw
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32943b8
Merge branch 'dev' into dev3
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committed
aae71bc
use mimalloc-override in test-stress in the msvc IDE
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committed
4cffe1d
use __MINGW32__ to detect mingw (instead of __GNUC__) -- use default win init (instead of MI_WIN_INIT_USE_FLS) on mingw (see also PR #1349)
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1cf8869
add mingw UCRT64 detection (see also PR #1349)
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e085876
merge from dev
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42805bf
Merge branch 'dev3' into dev3-meta
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144aa8c
add mingw ucrt64 test
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5a2f144
update mingw ucrt64
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1ce5c61
update mingw ucrt64
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2f85ac4
update mingw ucrt64
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5c15c1d
update mingw ucrt64
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b4cbf8b
update mingw ucrt64
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22c5a8a
update mingw ucrt64
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committed
8395e4f
update mingw ucrt64
daanx
committed
5ffa3ef
update mingw ucrt64
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committed
d15a8f4
fix msystem ucrt64 detection
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committed
e68ba5a
add msys2 mingw ucrt64 test
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6614106
merge from dev
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eb01759

Commits on Aug 5, 2026

add initial cygwin support (MSYS)
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committed
3a9f06f
merge from dev3 (cygwin)
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committed
e86928b
build with cygwin
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committed
3b4c63b
improve realloc codegen
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committed
8308d5d
merge from dev3
daanx
committed
9c041ce
bump version to v1.9.15
daanx
committed
d6c1135
merge from dev, bump version to v3.4.5
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committed
daeb818
update readme
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committed
6c84ab6
Merge branch 'dev' into dev3
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committed
acf2fdd
update readme
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committed
e6d8e90
Merge branch 'dev3' into dev3-meta
daanx
committed
44d996b
bump version to v3.5.0
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committed
b226da4
add comment
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committed
8cfe734
update readme
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committed
fc1e2ac
Merge branch 'dev3-meta' into dev3
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9b8de29
use atomics to access the pthread keys
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committed
a3aebea
update documentation
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999a9ac
merge from dev
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68320bf

Commits on Aug 6, 2026

update documentation
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6c85dbc
Merge branch 'dev' into dev3
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f45596a
update doxygen
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committed
da184bd
Merge branch 'dev' into dev3
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committed
7caa238
only purge arenas from
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committed
e4868fd
improve code for the pagemap
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committed
3f55a55
fix assertion
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committed
e80f5ff
fix potential deadlock when expanding threadlocals in debug mode, issue #1358
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committed
008d9d1
fix spelling from WINGW to MINGW
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committed
9acd218
merge from dev
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committed
2ec83e3
fix MINGW_UCRT ifdef
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12f212f
Merge branch 'dev' into dev3
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committed
2c18c98
improve atomic bit find and clear (see also PR #1346)
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committed
6f5bcfd
use optimistic bit clearing
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committed
af45b7e
fix return value of mi_bchunk_try_find_and_clear8
daanx
committed
61c96d4
set did_temp_clear_bits for optimistic locking
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committed
fcc5036
fix debug assertions for mi_free_small/size
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committed
8f620ea
improve fast path for mimalloc_generic
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committed
4e198c7

Commits on Aug 7, 2026

fix c++ tests
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committed
ce15ccd
fix numa node count detection on linux
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committed
870ac85
Merge branch 'dev' into dev3
daanx
committed
c8c2c5a
improve malloc inlining
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ff8e7de
add missing parens in avx512
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9929820
comment out wrong assertion
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792ead1

Commits on Aug 8, 2026

always enable pages stat count
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40c9e6f
merge from dev
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2e36264
fix C mode compilation on x86 with msvc, issue #1361
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67fe9d8
avoid unsigned negation to avoid compiler warnings
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committed
4899425

Commits on Aug 9, 2026

improved 2-level pagemap
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committed
d63979a
improved checked free
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committed
ab2d5bb
fix thread_locals_get
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committed
6def7be

Commits on Aug 11, 2026