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[3.11] GH-99729: Unlink frames before clearing them (#100047)

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Brandt Bucher 2022-12-06 09:02:19 -08:00 • committed by GitHub
parent 3fae04b10e
commit 2182a71eed
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4 changed files with 56 additions and 10 deletions
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18
Python/ceval.c
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@ -1617,14 +1617,6 @@ 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;
}
/* It is only between the PRECALL instruction and the following CALL,
* that this has any meaning.
*/
@ -2441,7 +2433,10 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
DTRACE_FUNCTION_EXIT();
_Py_LeaveRecursiveCallTstate(tstate);
if (!frame->is_entry) {
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);
_PyFrame_StackPush(frame, retval);
goto resume_frame;
}
@ -5833,7 +5828,10 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
assert(tstate->cframe->current_frame == frame->previous);
return NULL;
}
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);
resume_with_error:
SET_LOCALS_FROM_FRAME();