https://github.com/python/cpython/commit/af29d5cfd19bf2656955b9bb782cc89c7aa7000f
commit: af29d5cfd19bf2656955b9bb782cc89c7aa7000f
branch: main
author: Bénédikt Tran <10796600+picn...@users.noreply.github.com>
committer: picnixz <10796600+picn...@users.noreply.github.com>
date: 2025-03-24T10:14:22Z
summary:
gh-111178: fix UBSan failures for `Modules/_testcapimodule.c` (#131614)
Fix UBSan failures for various classes in `Modules/_testcapimodule.c`,
remove some redundant casts and add some `Py_UNUSED()` usages.
files:
M Modules/_testcapimodule.c
diff --git a/Modules/_testcapimodule.c b/Modules/_testcapimodule.c
index caaf83f578fc0f..3aa6e4c9e43a26 100644
--- a/Modules/_testcapimodule.c
+++ b/Modules/_testcapimodule.c
@@ -52,6 +52,12 @@ get_testerror(PyObject *self) {
return state->error;
}
+static void
+simple_object_dealloc(PyObject *self)
+{
+ PyObject_Free(self);
+}
+
/* Raise _testcapi.error with test_name + ": " + msg, and return NULL. */
static PyObject *
@@ -171,7 +177,7 @@ static PyTypeObject _HashInheritanceTester_Type = {
"hashinheritancetester", /* Name of this type */
sizeof(PyObject), /* Basic object size */
0, /* Item size for varobject */
- (destructor)PyObject_Free, /* tp_dealloc */
+ simple_object_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */
0, /* tp_getattr */
0, /* tp_setattr */
@@ -1737,7 +1743,7 @@ meth_o(PyObject* self, PyObject* obj)
}
static PyObject*
-meth_noargs(PyObject* self, PyObject* ignored)
+meth_noargs(PyObject* self, PyObject *Py_UNUSED(dummy))
{
return _null_to_none(self);
}
@@ -2552,10 +2558,10 @@ static PyMethodDef TestMethods[] = {
{"pyobject_repr_from_null", pyobject_repr_from_null, METH_NOARGS},
{"pyobject_str_from_null", pyobject_str_from_null, METH_NOARGS},
{"pyobject_bytes_from_null", pyobject_bytes_from_null, METH_NOARGS},
- {"test_capsule", (PyCFunction)test_capsule, METH_NOARGS},
- {"test_from_contiguous", (PyCFunction)test_from_contiguous, METH_NOARGS},
+ {"test_capsule", test_capsule, METH_NOARGS},
+ {"test_from_contiguous", test_from_contiguous, METH_NOARGS},
#if (defined(__linux__) || defined(__FreeBSD__)) && defined(__GNUC__)
- {"test_pep3118_obsolete_write_locks",
(PyCFunction)test_pep3118_obsolete_write_locks, METH_NOARGS},
+ {"test_pep3118_obsolete_write_locks", test_pep3118_obsolete_write_locks,
METH_NOARGS},
#endif
{"getbuffer_with_null_view", getbuffer_with_null_view, METH_O},
{"PyBuffer_SizeFromFormat", test_PyBuffer_SizeFromFormat, METH_VARARGS},
@@ -2768,6 +2774,7 @@ typedef struct {
PyObject *ao_iterator;
} awaitObject;
+#define awaitObject_CAST(op) ((awaitObject *)(op))
static PyObject *
awaitObject_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
@@ -2790,21 +2797,23 @@ awaitObject_new(PyTypeObject *type, PyObject *args,
PyObject *kwds)
static void
-awaitObject_dealloc(awaitObject *ao)
+awaitObject_dealloc(PyObject *op)
{
+ awaitObject *ao = awaitObject_CAST(op);
Py_CLEAR(ao->ao_iterator);
Py_TYPE(ao)->tp_free(ao);
}
static PyObject *
-awaitObject_await(awaitObject *ao)
+awaitObject_await(PyObject *op)
{
+ awaitObject *ao = awaitObject_CAST(op);
return Py_NewRef(ao->ao_iterator);
}
static PyAsyncMethods awaitType_as_async = {
- (unaryfunc)awaitObject_await, /* am_await */
+ awaitObject_await, /* am_await */
0, /* am_aiter */
0, /* am_anext */
0, /* am_send */
@@ -2816,7 +2825,7 @@ static PyTypeObject awaitType = {
"awaitType",
sizeof(awaitObject), /* tp_basicsize */
0, /* tp_itemsize */
- (destructor)awaitObject_dealloc, /* destructor tp_dealloc */
+ awaitObject_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */
0, /* tp_getattr */
0, /* tp_setattr */
@@ -2871,8 +2880,9 @@ MyList_new(PyTypeObject *type, PyObject *args, PyObject
*kwds)
}
void
-MyList_dealloc(MyListObject* op)
+MyList_dealloc(PyObject *self)
{
+ MyListObject *op = (MyListObject *)self;
if (op->deallocated) {
/* We cannot raise exceptions here but we still want the testsuite
* to fail when we hit this */
@@ -2887,7 +2897,7 @@ static PyTypeObject MyList_Type = {
"MyList",
sizeof(MyListObject),
0,
- (destructor)MyList_dealloc, /* tp_dealloc */
+ MyList_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */
0, /* tp_getattr */
0, /* tp_setattr */
@@ -2935,11 +2945,11 @@ generic_alias_dealloc(PyObject *op)
{
PyGenericAliasObject *self = (PyGenericAliasObject*)op;
Py_CLEAR(self->item);
- Py_TYPE(self)->tp_free((PyObject *)self);
+ Py_TYPE(self)->tp_free(self);
}
static PyObject *
-generic_alias_mro_entries(PyObject *op, PyObject *bases)
+generic_alias_mro_entries(PyObject *op, PyObject *Py_UNUSED(bases))
{
PyGenericAliasObject *self = (PyGenericAliasObject*)op;
return PyTuple_Pack(1, self->item);
@@ -3090,7 +3100,7 @@ ContainerNoGC_dealloc(PyObject *op)
{
ContainerNoGCobject *self = (ContainerNoGCobject*)op;
Py_DECREF(self->value);
- Py_TYPE(self)->tp_free((PyObject *)self);
+ Py_TYPE(self)->tp_free(self);
}
static PyMemberDef ContainerNoGC_members[] = {
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