8000 gh-111178: fix UBSan failures in `Objects/codeobject.c` by picnixz · Pull Request #128240 · python/cpython · GitHub
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gh-111178: fix UBSan failures in Objects/codeobject.c #128240

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Merged
merged 3 commits into from
Jan 13, 2025
Merged

gh-111178: fix UBSan failures in Objects/codeobject.c #128240

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1136a4e
fix UBSan failures for `PyCodeObject`
picnixz Dec 23, 2024
a774384
add macro with assertion as per Mark's recommendation
picnixz Jan 8, 2025
99e5607
improve UBSan failure fixes using our macro
picnixz Jan 8, 2025
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16 changes: 9 additions & 7 deletions Objects/codeobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1865,11 +1865,12 @@ free_monitoring_data(_PyCoMonitoringData *data)
}

static void
code_dealloc(PyCodeObject *co)
code_dealloc(PyObject *self)
{
_PyObject_ResurrectStart((PyObject *)co);
PyCodeObject *co = (PyCodeObject *)self;
_PyObject_ResurrectStart(self);
notify_code_watchers(PY_CODE_EVENT_DESTROY, co);
if (_PyObject_ResurrectEnd((PyObject *)co)) {
if (_PyObject_ResurrectEnd(self)) {
return;
}

Expand Down Expand Up @@ -1918,7 +1919,7 @@ code_dealloc(PyCodeObject *co)
PyMem_Free(co->_co_cached);
}
if (co->co_weakreflist != NULL) {
PyObject_ClearWeakRefs((PyObject*)co);
PyObject_ClearWeakRefs(self);
}
free_monitoring_data(co->_co_monitoring);
#ifdef Py_GIL_DISABLED
Expand Down Expand Up @@ -2198,8 +2199,9 @@ code_linesiterator(PyObject *self, PyObject *Py_UNUSED(args))
}

static PyObject *
code_branchesiterator(PyCodeObject *code, PyObject *Py_UNUSED(args))
code_branchesiterator(PyObject *self, PyObject *Py_UNUSED(args))
{
PyCodeObject *code = (PyCodeObject*)self;
return _PyInstrumentation_BranchesIterator(code);
}

Expand Down Expand Up @@ -2343,7 +2345,7 @@ code__varname_from_oparg_impl(PyCodeObject *self, int oparg)
static struct PyMethodDef code_methods[] = {
{"__sizeof__", code_sizeof, METH_NOARGS},
{"co_lines", code_linesiterator, METH_NOARGS},
{"co_branches", (PyCFunction)code_branchesiterator, METH_NOARGS},
{"co_branches", code_branchesiterator, METH_NOARGS},
{"co_positions", code_positionsiterator, METH_NOARGS},
CODE_REPLACE_METHODDEF
CODE__VARNAME_FROM_OPARG_METHODDEF
Expand All @@ -2358,7 +2360,7 @@ PyTypeObject PyCode_Type = {
"code",
offsetof(PyCodeObject, co_code_adaptive),
sizeof(_Py_CODEUNIT),
(destructor)code_dealloc, /* tp_dealloc */
code_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */
0, /* tp_getattr */
0, /* tp_setattr */
Expand Down
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