gh-145846: Fix memory leak in _lsprof clearEntries() context chain#145847
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vstinner merged 4 commits intopython:mainfrom Apr 7, 2026
Merged
gh-145846: Fix memory leak in _lsprof clearEntries() context chain#145847vstinner merged 4 commits intopython:mainfrom
vstinner merged 4 commits intopython:mainfrom
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clearEntries() only freed the top currentProfilerContext but did not walk the previous linked list. When clear() is called during active profiling with nested calls, all contexts except the top one were leaked. Fix by iterating the entire linked list, matching the existing freelistProfilerContext cleanup pattern.
vstinner
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Mar 27, 2026
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LGTM.
I confirm that ./python -m test test_profiling.test_tracing_profiler -m test_clear_with_nested_calls -R 3:3 leaks without the fix, and doesn't leak with the fix.
- Rename 'c' to 'pContext' in clearEntries() loop for consistency - Rename 'p' to 'profiler' in test_clear_with_nested_calls()
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@vstinner Thanks for review, done! |
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"Tests / All required checks pass" fails with: Let me try to [Update branch] to see if it repairs the CI. |
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Merged, thanks for the fix! |
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Fix
clearEntries()to walk the entirecurrentProfilerContextlinked list instead of only freeing the top context, preventing memory leaks whenclear()is called during nested profiled calls._lsprof: Memory leak inclearEntries()context chain not fully freed #145846