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GH-99729: Unlink frames before clearing them (GH-100030)

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Brandt Bucher 2022-12-06 06:01:38 -08:00 • committed by GitHub
parent 85d5a7e8ef
commit b72014c783
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6 changed files with 60 additions and 11 deletions
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13
Python/ceval.c
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@ -1009,14 +1009,6 @@ trace_function_exit(PyThreadState *tstate, _PyInterpreterFrame *frame, PyObject
return 0;
}
static _PyInterpreterFrame *
pop_frame(PyThreadState *tstate, _PyInterpreterFrame *frame)
{
_PyInterpreterFrame *prev_frame = frame->previous;
_PyEvalFrameClearAndPop(tstate, frame);
return prev_frame;
}
int _Py_CheckRecursiveCallPy(
PyThreadState *tstate)
@ -1432,7 +1424,10 @@ exit_unwind:
assert(_PyErr_Occurred(tstate));
_Py_LeaveRecursiveCallPy(tstate);
assert(frame != &entry_frame);
frame = cframe.current_frame = pop_frame(tstate, frame);
// GH-99729: We need to unlink the frame *before* clearing it:
_PyInterpreterFrame *dying = frame;
frame = cframe.current_frame = dying->previous;
_PyEvalFrameClearAndPop(tstate, dying);
if (frame == &entry_frame) {
/* Restore previous cframe and exit */
tstate->cframe = cframe.previous;