feat(run): support simulation for free-threaded python#167
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adriencaccia merged 1 commit intomainfrom Nov 28, 2025
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Pull request overview
This PR adds support for free-threaded Python builds by conditionally setting the PYTHONMALLOC environment variable. Free-threaded Python (with GIL disabled) manages memory differently and does not support PYTHONMALLOC=malloc, so the code now detects this configuration and skips setting the environment variable when appropriate.
Key Changes:
- Introduced a new helper function to detect free-threaded Python builds via
sysconfig.get_config_var('Py_GIL_DISABLED') - Modified the measurement setup to conditionally set
PYTHONMALLOC=malloconly for non-free-threaded Python
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| src/run/runner/valgrind/measure.rs | Updated to conditionally set PYTHONMALLOC environment variable based on Python build type |
| src/run/runner/valgrind/helpers/python.rs | New module with detection logic for free-threaded Python builds |
| src/run/runner/valgrind/helpers/mod.rs | Added python module export |
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Remove PYTHONMALLOC=malloc which is unsupported for free-threaded builds
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Remove PYTHONMALLOC=malloc which is unsupported for free-threaded builds
Needed for CodSpeedHQ/pytest-codspeed#96 to land