From decf93dd27cbfd6293662c31a36d52c9a7b620c6 Mon Sep 17 00:00:00 2001 From: Kevin Wang Date: Wed, 10 Dec 2025 02:29:40 -0500 Subject: [PATCH] [3.13] gh-142048: Fix lost gc allocations count on thread cleanup (GH-142233) (cherry picked from commit 49b1fb43f65290dadeb83ed6f7c0c74995fda7a1) Co-authored-by: Kevin Wang --- Python/pystate.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Python/pystate.c b/Python/pystate.c index ba62a93d4574e6..68e76e4aed5a39 100644 --- a/Python/pystate.c +++ b/Python/pystate.c @@ -1743,6 +1743,14 @@ PyThreadState_Clear(PyThreadState *tstate) // Remove ourself from the biased reference counting table of threads. _Py_brc_remove_thread(tstate); + + // Flush the thread's local GC allocation count to the global count + // before the thread state is cleared, otherwise the count is lost. + _PyThreadStateImpl *tstate_impl = (_PyThreadStateImpl *)tstate; + _Py_atomic_add_int(&tstate->interp->gc.generations[0].count, + (int)tstate_impl->gc.alloc_count); + tstate_impl->gc.alloc_count = 0; + #endif // Merge our queue of pointers to be freed into the interpreter queue.