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gh-132643: use atomic load for dict in specializer (#132653)

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Kumar Aditya 2025-04-18 15:06:27 +05:30 • committed by GitHub
parent 80295a8f9b
commit f3d877a27a
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Python/specialize.c
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@ -1641,7 +1641,8 @@ specialize_attr_loadclassattr(PyObject *owner, _Py_CODEUNIT *instr,
specialize(instr, is_method ? LOAD_ATTR_METHOD_NO_DICT : LOAD_ATTR_NONDESCRIPTOR_NO_DICT);
}
else if (is_method) {
PyObject *dict = *(PyObject **) ((char *)owner + dictoffset);
PyObject **addr = (PyObject **)((char *)owner + dictoffset);
PyObject *dict = FT_ATOMIC_LOAD_PTR_ACQUIRE(*addr);
if (dict) {
SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_NOT_MANAGED_DICT);
return 0;