gh-129185: Use PyMutex in tracemalloc #129246
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vstinner
commented
Jan 23, 2025
| #define tables_lock _PyRuntime.tracemalloc.tables_lock | ||
| #define TABLES_LOCK() PyThread_acquire_lock(tables_lock, 1) | ||
| #define TABLES_UNLOCK() PyThread_release_lock(tables_lock) | ||
| #define TABLES_LOCK() PyMutex_LockFlags(&tables_lock, _Py_LOCK_DONT_DETACH) |
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PyMutex_Lock(&tables_lock) cannot be used "free" allocator hooks which don't acquire the GIL.
Maybe PyMutex_Lock(&tables_lock) should be preferred in functions which hold the GIL?
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I don't think it matters. TABLES_LOCK() didn't detach the thread state before, no need to now. (In fact, some unpredictable things might happen if another thread takes the GIL and then uses tracemalloc.)
ZeroIntensity
approved these changes
Jan 24, 2025
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