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gh-151436: Fix missing tstate->last_profiled_frame updates (#151437)

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Maurycy Pawłowski-Wieroński
2026-06-17 22:49:23 +02:00
committed by GitHub
parent eff805b7a7
commit a8d74c062f
8 changed files with 33 additions and 8 deletions
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Python/ceval.c
+2 -8
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@@ -1974,15 +1974,8 @@ clear_gen_frame(PyThreadState *tstate, _PyInterpreterFrame * frame)
void
_PyEval_FrameClearAndPop(PyThreadState *tstate, _PyInterpreterFrame * frame)
{
// Update last_profiled_frame for remote profiler frame caching.
// By this point, tstate->current_frame is already set to the parent frame.
// Only update if we're popping the exact frame that was last profiled.
// This avoids corrupting the cache when transient frames (called and returned
// between profiler samples) update last_profiled_frame to addresses the
// profiler never saw.
if (tstate->last_profiled_frame != NULL && tstate->last_profiled_frame == frame) {
tstate->last_profiled_frame = tstate->current_frame;
}
_PyThreadState_UpdateLastProfiledFrame(tstate, frame, tstate->current_frame);
if (frame->owner == FRAME_OWNED_BY_THREAD) {
clear_thread_frame(tstate, frame);
@@ -2008,6 +2001,7 @@ _PyEvalFramePushAndInit(PyThreadState *tstate, _PyStackRef func,
_PyFrame_Initialize(tstate, frame, func, locals, code, 0, previous);
if (initialize_locals(tstate, func_obj, frame->localsplus, args, argcount, kwnames)) {
assert(frame->owner == FRAME_OWNED_BY_THREAD);
_PyThreadState_UpdateLastProfiledFrame(tstate, frame, tstate->current_frame);
clear_thread_frame(tstate, frame);
return NULL;
}