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GH-127705: better double free message. (GH-130785)

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* Add location information when accessing already closed stackref

* Add #def option to track closed stackrefs to provide precise information for use after free and double frees.
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Mark Shannon 2025-03-05 14:00:42 +00:00 • committed by GitHub
parent f33d21e24f
commit 78d50e91ff
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5 changed files with 69 additions and 20 deletions
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Objects/object.c
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@ -2984,7 +2984,7 @@ _Py_Dealloc(PyObject *op)
destructor dealloc = type->tp_dealloc;
#ifdef Py_DEBUG
PyThreadState *tstate = _PyThreadState_GET();
#ifndef Py_GIL_DISABLED
#if !defined(Py_GIL_DISABLED) && !defined(Py_STACKREF_DEBUG)
/* This assertion doesn't hold for the free-threading build, as
* PyStackRef_CLOSE_SPECIALIZED is not implemented */
assert(tstate->current_frame == NULL || tstate->current_frame->stackpointer != NULL);