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‘address_of_code_object’ may be used uninitialized in this function [-Wmaybe-uninitialized] warning in _remote_debugging_module.c #134693

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‘address_of_code_object’ may be used uninitialized in this function [-Wmaybe-uninitialized] warning in _remote_debugging_module.c#134693
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sobolevn
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3.15new features, bugs and security fixesextension-modulesC modules in the Modules dirtype-bugAn unexpected behavior, bug, or error
@sobolevn

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@sobolevn
sobolevn
opened on May 26, 2025
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cpython/Modules/_remote_debugging_module.c

Lines 1876 to 1894 in cf8941c

*previous_frame = GET_MEMBER(uintptr_t, frame, unwinder->debug_offsets.interpreter_frame.previous);
if (GET_MEMBER(char, frame, unwinder->debug_offsets.interpreter_frame.owner) == FRAME_OWNED_BY_CSTACK ||
GET_MEMBER(char, frame, unwinder->debug_offsets.interpreter_frame.owner) == FRAME_OWNED_BY_INTERPRETER) {
return 0; // C frame
}
if (GET_MEMBER(char, frame, unwinder->debug_offsets.interpreter_frame.owner) != FRAME_OWNED_BY_GENERATOR
&& GET_MEMBER(char, frame, unwinder->debug_offsets.interpreter_frame.owner) != FRAME_OWNED_BY_THREAD) {
PyErr_Format(PyExc_RuntimeError, "Unhandled frame owner %d.\n",
GET_MEMBER(char, frame, unwinder->debug_offsets.interpreter_frame.owner));
return -1;
}
*code_object = GET_MEMBER(uintptr_t, frame, unwinder->debug_offsets.interpreter_frame.executable);
// Strip tag bits for consistent comparison
*code_object &= ~Py_TAG_BITS;
assert(code_object != NULL);

Here it is clear that *code_object = might not be executed in several cases. I have a PR ready.

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3.15new features, bugs and security fixesextension-modulesC modules in the Modules dirtype-bugAn unexpected behavior, bug, or error

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