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gh-111178: Avoid calling functions from incompatible pointer types in listobject.c (GH-112820) 

Fix undefined behavior warnings (UBSan  -fsanitize=function), for example:

Objects/object.c:674:11: runtime error: call to function list_repr through pointer to incorrect function type 'struct _object *(*)(struct _object *)'
listobject.c:382: note: list_repr defined here
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior Objects/object.c:674:11 in
This commit is contained in:
Christopher Chavez 2024-01-02 07:41:32 -06:00 committed by GitHub
parent 9ed36d533a
commit 5d36a95e64
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 92 additions and 72 deletions
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164
Objects/listobject.c
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@ -343,8 +343,9 @@ PyList_Append(PyObject *op, PyObject *newitem)
/* Methods */ /* Methods */
static void static void
list_dealloc(PyListObject *op) list_dealloc(PyObject *self)
{ {
PyListObject *op = (PyListObject *)self;
Py_ssize_t i; Py_ssize_t i;
PyObject_GC_UnTrack(op); PyObject_GC_UnTrack(op);
Py_TRASHCAN_BEGIN(op, list_dealloc) Py_TRASHCAN_BEGIN(op, list_dealloc)
@ -378,8 +379,9 @@ list_dealloc(PyListObject *op)
} }
static PyObject * static PyObject *
list_repr(PyListObject *v) list_repr(PyObject *self)
{ {
PyListObject *v = (PyListObject *)self;
Py_ssize_t i; Py_ssize_t i;
PyObject *s; PyObject *s;
_PyUnicodeWriter writer; _PyUnicodeWriter writer;
@ -434,14 +436,15 @@ error:
} }
static Py_ssize_t static Py_ssize_t
list_length(PyListObject *a) list_length(PyObject *a)
{ {
return Py_SIZE(a); return Py_SIZE(a);
} }
static int static int
list_contains(PyListObject *a, PyObject *el) list_contains(PyObject *aa, PyObject *el)
{ {
PyListObject *a = (PyListObject *)aa;
PyObject *item; PyObject *item;
Py_ssize_t i; Py_ssize_t i;
int cmp; int cmp;
@ -456,8 +459,9 @@ list_contains(PyListObject *a, PyObject *el)
} }
static PyObject * static PyObject *
list_item(PyListObject *a, Py_ssize_t i) list_item(PyObject *aa, Py_ssize_t i)
{ {
PyListObject *a = (PyListObject *)aa;
if (!valid_index(i, Py_SIZE(a))) { if (!valid_index(i, Py_SIZE(a))) {
PyErr_SetObject(PyExc_IndexError, &_Py_STR(list_err)); PyErr_SetObject(PyExc_IndexError, &_Py_STR(list_err));
return NULL; return NULL;
@ -512,8 +516,9 @@ PyList_GetSlice(PyObject *a, Py_ssize_t ilow, Py_ssize_t ihigh)
} }
static PyObject * static PyObject *
list_concat(PyListObject *a, PyObject *bb) list_concat(PyObject *aa, PyObject *bb)
{ {
PyListObject *a = (PyListObject *)aa;
Py_ssize_t size; Py_ssize_t size;
Py_ssize_t i; Py_ssize_t i;
PyObject **src, **dest; PyObject **src, **dest;
@ -552,8 +557,9 @@ list_concat(PyListObject *a, PyObject *bb)
} }
static PyObject * static PyObject *
list_repeat(PyListObject *a, Py_ssize_t n) list_repeat(PyObject *aa, Py_ssize_t n)
{ {
PyListObject *a = (PyListObject *)aa;
const Py_ssize_t input_size = Py_SIZE(a); const Py_ssize_t input_size = Py_SIZE(a);
if (input_size == 0 || n <= 0) if (input_size == 0 || n <= 0)
return PyList_New(0); return PyList_New(0);
@ -616,9 +622,9 @@ list_clear(PyListObject *a)
} }
static int static int
list_clear_slot(PyListObject *self) list_clear_slot(PyObject *self)
{ {
list_clear(self); list_clear((PyListObject *)self);
return 0; return 0;
} }
@ -745,8 +751,9 @@ PyList_SetSlice(PyObject *a, Py_ssize_t ilow, Py_ssize_t ihigh, PyObject *v)
} }
static PyObject * static PyObject *
list_inplace_repeat(PyListObject *self, Py_ssize_t n) list_inplace_repeat(PyObject *_self, Py_ssize_t n)
{ {
PyListObject *self = (PyListObject *)_self;
Py_ssize_t input_size = PyList_GET_SIZE(self); Py_ssize_t input_size = PyList_GET_SIZE(self);
if (input_size == 0 || n == 1) { if (input_size == 0 || n == 1) {
return Py_NewRef(self); return Py_NewRef(self);
@ -776,8 +783,9 @@ list_inplace_repeat(PyListObject *self, Py_ssize_t n)
} }
static int static int
list_ass_item(PyListObject *a, Py_ssize_t i, PyObject *v) list_ass_item(PyObject *aa, Py_ssize_t i, PyObject *v)
{ {
PyListObject *a = (PyListObject *)aa;
if (!valid_index(i, Py_SIZE(a))) { if (!valid_index(i, Py_SIZE(a))) {
PyErr_SetString(PyExc_IndexError, PyErr_SetString(PyExc_IndexError,
"list assignment index out of range"); "list assignment index out of range");
@ -1044,8 +1052,9 @@ PyList_Clear(PyObject *self)
static PyObject * static PyObject *
list_inplace_concat(PyListObject *self, PyObject *other) list_inplace_concat(PyObject *_self, PyObject *other)
{ {
PyListObject *self = (PyListObject *)_self;
if (list_extend(self, other) < 0) { if (list_extend(self, other) < 0) {
return NULL; return NULL;
} }
@ -2756,8 +2765,9 @@ list_remove(PyListObject *self, PyObject *value)
} }
static int static int
list_traverse(PyListObject *o, visitproc visit, void *arg) list_traverse(PyObject *self, visitproc visit, void *arg)
{ {
PyListObject *o = (PyListObject *)self;
Py_ssize_t i; Py_ssize_t i;
for (i = Py_SIZE(o); --i >= 0; ) for (i = Py_SIZE(o); --i >= 0; )
@ -2897,10 +2907,10 @@ list___sizeof___impl(PyListObject *self)
} }
static PyObject *list_iter(PyObject *seq); static PyObject *list_iter(PyObject *seq);
static PyObject *list_subscript(PyListObject*, PyObject*); static PyObject *list_subscript(PyObject*, PyObject*);
static PyMethodDef list_methods[] = { static PyMethodDef list_methods[] = {
{"__getitem__", (PyCFunction)list_subscript, METH_O|METH_COEXIST, {"__getitem__", list_subscript, METH_O|METH_COEXIST,
PyDoc_STR("__getitem__($self, index, /)\n--\n\nReturn self[index].")}, PyDoc_STR("__getitem__($self, index, /)\n--\n\nReturn self[index].")},
LIST___REVERSED___METHODDEF LIST___REVERSED___METHODDEF
LIST___SIZEOF___METHODDEF LIST___SIZEOF___METHODDEF
@ -2920,21 +2930,22 @@ static PyMethodDef list_methods[] = {
}; };
static PySequenceMethods list_as_sequence = { static PySequenceMethods list_as_sequence = {
(lenfunc)list_length, /* sq_length */ list_length, /* sq_length */
(binaryfunc)list_concat, /* sq_concat */ list_concat, /* sq_concat */
(ssizeargfunc)list_repeat, /* sq_repeat */ list_repeat, /* sq_repeat */
(ssizeargfunc)list_item, /* sq_item */ list_item, /* sq_item */
0, /* sq_slice */ 0, /* sq_slice */
(ssizeobjargproc)list_ass_item, /* sq_ass_item */ list_ass_item, /* sq_ass_item */
0, /* sq_ass_slice */ 0, /* sq_ass_slice */
(objobjproc)list_contains, /* sq_contains */ list_contains, /* sq_contains */
(binaryfunc)list_inplace_concat, /* sq_inplace_concat */ list_inplace_concat, /* sq_inplace_concat */
(ssizeargfunc)list_inplace_repeat, /* sq_inplace_repeat */ list_inplace_repeat, /* sq_inplace_repeat */
}; };
static PyObject * static PyObject *
list_subscript(PyListObject* self, PyObject* item) list_subscript(PyObject* _self, PyObject* item)
{ {
PyListObject* self = (PyListObject*)_self;
if (_PyIndex_Check(item)) { if (_PyIndex_Check(item)) {
Py_ssize_t i; Py_ssize_t i;
i = PyNumber_AsSsize_t(item, PyExc_IndexError); i = PyNumber_AsSsize_t(item, PyExc_IndexError);
@ -2942,7 +2953,7 @@ list_subscript(PyListObject* self, PyObject* item)
return NULL; return NULL;
if (i < 0) if (i < 0)
i += PyList_GET_SIZE(self); i += PyList_GET_SIZE(self);
return list_item(self, i); return list_item((PyObject *)self, i);
} }
else if (PySlice_Check(item)) { else if (PySlice_Check(item)) {
Py_ssize_t start, stop, step, slicelength, i; Py_ssize_t start, stop, step, slicelength, i;
@ -2987,15 +2998,16 @@ list_subscript(PyListObject* self, PyObject* item)
} }
static int static int
list_ass_subscript(PyListObject* self, PyObject* item, PyObject* value) list_ass_subscript(PyObject* _self, PyObject* item, PyObject* value)
{ {
PyListObject *self = (PyListObject *)_self;
if (_PyIndex_Check(item)) { if (_PyIndex_Check(item)) {
Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError); Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
if (i == -1 && PyErr_Occurred()) if (i == -1 && PyErr_Occurred())
return -1; return -1;
if (i < 0) if (i < 0)
i += PyList_GET_SIZE(self); i += PyList_GET_SIZE(self);
return list_ass_item(self, i, value); return list_ass_item((PyObject *)self, i, value);
} }
else if (PySlice_Check(item)) { else if (PySlice_Check(item)) {
Py_ssize_t start, stop, step, slicelength; Py_ssize_t start, stop, step, slicelength;
@ -3149,9 +3161,9 @@ list_ass_subscript(PyListObject* self, PyObject* item, PyObject* value)
} }
static PyMappingMethods list_as_mapping = { static PyMappingMethods list_as_mapping = {
(lenfunc)list_length, list_length,
(binaryfunc)list_subscript, list_subscript,
(objobjargproc)list_ass_subscript list_ass_subscript
}; };
PyTypeObject PyList_Type = { PyTypeObject PyList_Type = {
@ -3159,12 +3171,12 @@ PyTypeObject PyList_Type = {
"list", "list",
sizeof(PyListObject), sizeof(PyListObject),
0, 0,
(destructor)list_dealloc, /* tp_dealloc */ list_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */ 0, /* tp_vectorcall_offset */
0, /* tp_getattr */ 0, /* tp_getattr */
0, /* tp_setattr */ 0, /* tp_setattr */
0, /* tp_as_async */ 0, /* tp_as_async */
(reprfunc)list_repr, /* tp_repr */ list_repr, /* tp_repr */
0, /* tp_as_number */ 0, /* tp_as_number */
&list_as_sequence, /* tp_as_sequence */ &list_as_sequence, /* tp_as_sequence */
&list_as_mapping, /* tp_as_mapping */ &list_as_mapping, /* tp_as_mapping */
@ -3178,8 +3190,8 @@ PyTypeObject PyList_Type = {
Py_TPFLAGS_BASETYPE | Py_TPFLAGS_LIST_SUBCLASS | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_LIST_SUBCLASS |
_Py_TPFLAGS_MATCH_SELF | Py_TPFLAGS_SEQUENCE, /* tp_flags */ _Py_TPFLAGS_MATCH_SELF | Py_TPFLAGS_SEQUENCE, /* tp_flags */
list___init____doc__, /* tp_doc */ list___init____doc__, /* tp_doc */
(traverseproc)list_traverse, /* tp_traverse */ list_traverse, /* tp_traverse */
(inquiry)list_clear_slot, /* tp_clear */ list_clear_slot, /* tp_clear */
list_richcompare, /* tp_richcompare */ list_richcompare, /* tp_richcompare */
0, /* tp_weaklistoffset */ 0, /* tp_weaklistoffset */
list_iter, /* tp_iter */ list_iter, /* tp_iter */
@ -3201,22 +3213,22 @@ PyTypeObject PyList_Type = {
/*********************** List Iterator **************************/ /*********************** List Iterator **************************/
static void listiter_dealloc(_PyListIterObject *); static void listiter_dealloc(PyObject *);
static int listiter_traverse(_PyListIterObject *, visitproc, void *); static int listiter_traverse(PyObject *, visitproc, void *);
static PyObject *listiter_next(_PyListIterObject *); static PyObject *listiter_next(PyObject *);
static PyObject *listiter_len(_PyListIterObject *, PyObject *); static PyObject *listiter_len(PyObject *, PyObject *);
static PyObject *listiter_reduce_general(void *_it, int forward); static PyObject *listiter_reduce_general(void *_it, int forward);
static PyObject *listiter_reduce(_PyListIterObject *, PyObject *); static PyObject *listiter_reduce(PyObject *, PyObject *);
static PyObject *listiter_setstate(_PyListIterObject *, PyObject *state); static PyObject *listiter_setstate(PyObject *, PyObject *state);
PyDoc_STRVAR(length_hint_doc, "Private method returning an estimate of len(list(it))."); PyDoc_STRVAR(length_hint_doc, "Private method returning an estimate of len(list(it)).");
PyDoc_STRVAR(reduce_doc, "Return state information for pickling."); PyDoc_STRVAR(reduce_doc, "Return state information for pickling.");
PyDoc_STRVAR(setstate_doc, "Set state information for unpickling."); PyDoc_STRVAR(setstate_doc, "Set state information for unpickling.");
static PyMethodDef listiter_methods[] = { static PyMethodDef listiter_methods[] = {
{"__length_hint__", (PyCFunction)listiter_len, METH_NOARGS, length_hint_doc}, {"__length_hint__", listiter_len, METH_NOARGS, length_hint_doc},
{"__reduce__", (PyCFunction)listiter_reduce, METH_NOARGS, reduce_doc}, {"__reduce__", listiter_reduce, METH_NOARGS, reduce_doc},
{"__setstate__", (PyCFunction)listiter_setstate, METH_O, setstate_doc}, {"__setstate__", listiter_setstate, METH_O, setstate_doc},
{NULL, NULL} /* sentinel */ {NULL, NULL} /* sentinel */
}; };
@ -3226,7 +3238,7 @@ PyTypeObject PyListIter_Type = {
sizeof(_PyListIterObject), /* tp_basicsize */ sizeof(_PyListIterObject), /* tp_basicsize */
0, /* tp_itemsize */ 0, /* tp_itemsize */
/* methods */ /* methods */
(destructor)listiter_dealloc, /* tp_dealloc */ listiter_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */ 0, /* tp_vectorcall_offset */
0, /* tp_getattr */ 0, /* tp_getattr */
0, /* tp_setattr */ 0, /* tp_setattr */
@ -3243,12 +3255,12 @@ PyTypeObject PyListIter_Type = {
0, /* tp_as_buffer */ 0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
0, /* tp_doc */ 0, /* tp_doc */
(traverseproc)listiter_traverse, /* tp_traverse */ listiter_traverse, /* tp_traverse */
0, /* tp_clear */ 0, /* tp_clear */
0, /* tp_richcompare */ 0, /* tp_richcompare */
0, /* tp_weaklistoffset */ 0, /* tp_weaklistoffset */
PyObject_SelfIter, /* tp_iter */ PyObject_SelfIter, /* tp_iter */
(iternextfunc)listiter_next, /* tp_iternext */ listiter_next, /* tp_iternext */
listiter_methods, /* tp_methods */ listiter_methods, /* tp_methods */
0, /* tp_members */ 0, /* tp_members */
}; };
@ -3273,23 +3285,25 @@ list_iter(PyObject *seq)
} }
static void static void
listiter_dealloc(_PyListIterObject *it) listiter_dealloc(PyObject *self)
{ {
_PyListIterObject *it = (_PyListIterObject *)self;
_PyObject_GC_UNTRACK(it); _PyObject_GC_UNTRACK(it);
Py_XDECREF(it->it_seq); Py_XDECREF(it->it_seq);
PyObject_GC_Del(it); PyObject_GC_Del(it);
} }
static int static int
listiter_traverse(_PyListIterObject *it, visitproc visit, void *arg) listiter_traverse(PyObject *it, visitproc visit, void *arg)
{ {
Py_VISIT(it->it_seq); Py_VISIT(((_PyListIterObject *)it)->it_seq);
return 0; return 0;
} }
static PyObject * static PyObject *
listiter_next(_PyListIterObject *it) listiter_next(PyObject *self)
{ {
_PyListIterObject *it = (_PyListIterObject *)self;
PyListObject *seq; PyListObject *seq;
PyObject *item; PyObject *item;
@ -3311,8 +3325,9 @@ listiter_next(_PyListIterObject *it)
} }
static PyObject * static PyObject *
listiter_len(_PyListIterObject *it, PyObject *Py_UNUSED(ignored)) listiter_len(PyObject *self, PyObject *Py_UNUSED(ignored))
{ {
_PyListIterObject *it = (_PyListIterObject *)self;
Py_ssize_t len; Py_ssize_t len;
if (it->it_seq) { if (it->it_seq) {
len = PyList_GET_SIZE(it->it_seq) - it->it_index; len = PyList_GET_SIZE(it->it_seq) - it->it_index;
@ -3323,14 +3338,15 @@ listiter_len(_PyListIterObject *it, PyObject *Py_UNUSED(ignored))
} }
static PyObject * static PyObject *
listiter_reduce(_PyListIterObject *it, PyObject *Py_UNUSED(ignored)) listiter_reduce(PyObject *it, PyObject *Py_UNUSED(ignored))
{ {
return listiter_reduce_general(it, 1); return listiter_reduce_general(it, 1);
} }
static PyObject * static PyObject *
listiter_setstate(_PyListIterObject *it, PyObject *state) listiter_setstate(PyObject *self, PyObject *state)
{ {
_PyListIterObject *it = (_PyListIterObject *)self;
Py_ssize_t index = PyLong_AsSsize_t(state); Py_ssize_t index = PyLong_AsSsize_t(state);
if (index == -1 && PyErr_Occurred()) if (index == -1 && PyErr_Occurred())
return NULL; return NULL;
@ -3352,17 +3368,17 @@ typedef struct {
PyListObject *it_seq; /* Set to NULL when iterator is exhausted */ PyListObject *it_seq; /* Set to NULL when iterator is exhausted */
} listreviterobject; } listreviterobject;
static void listreviter_dealloc(listreviterobject *); static void listreviter_dealloc(PyObject *);
static int listreviter_traverse(listreviterobject *, visitproc, void *); static int listreviter_traverse(PyObject *, visitproc, void *);
static PyObject *listreviter_next(listreviterobject *); static PyObject *listreviter_next(PyObject *);
static PyObject *listreviter_len(listreviterobject *, PyObject *); static PyObject *listreviter_len(PyObject *, PyObject *);
static PyObject *listreviter_reduce(listreviterobject *, PyObject *); static PyObject *listreviter_reduce(PyObject *, PyObject *);
static PyObject *listreviter_setstate(listreviterobject *, PyObject *); static PyObject *listreviter_setstate(PyObject *, PyObject *);
static PyMethodDef listreviter_methods[] = { static PyMethodDef listreviter_methods[] = {
{"__length_hint__", (PyCFunction)listreviter_len, METH_NOARGS, length_hint_doc}, {"__length_hint__", listreviter_len, METH_NOARGS, length_hint_doc},
{"__reduce__", (PyCFunction)listreviter_reduce, METH_NOARGS, reduce_doc}, {"__reduce__", listreviter_reduce, METH_NOARGS, reduce_doc},
{"__setstate__", (PyCFunction)listreviter_setstate, METH_O, setstate_doc}, {"__setstate__", listreviter_setstate, METH_O, setstate_doc},
{NULL, NULL} /* sentinel */ {NULL, NULL} /* sentinel */
}; };
@ -3372,7 +3388,7 @@ PyTypeObject PyListRevIter_Type = {
sizeof(listreviterobject), /* tp_basicsize */ sizeof(listreviterobject), /* tp_basicsize */
0, /* tp_itemsize */ 0, /* tp_itemsize */
/* methods */ /* methods */
(destructor)listreviter_dealloc, /* tp_dealloc */ listreviter_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */ 0, /* tp_vectorcall_offset */
0, /* tp_getattr */ 0, /* tp_getattr */
0, /* tp_setattr */ 0, /* tp_setattr */
@ -3389,12 +3405,12 @@ PyTypeObject PyListRevIter_Type = {
0, /* tp_as_buffer */ 0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
0, /* tp_doc */ 0, /* tp_doc */
(traverseproc)listreviter_traverse, /* tp_traverse */ listreviter_traverse, /* tp_traverse */
0, /* tp_clear */ 0, /* tp_clear */
0, /* tp_richcompare */ 0, /* tp_richcompare */
0, /* tp_weaklistoffset */ 0, /* tp_weaklistoffset */
PyObject_SelfIter, /* tp_iter */ PyObject_SelfIter, /* tp_iter */
(iternextfunc)listreviter_next, /* tp_iternext */ listreviter_next, /* tp_iternext */
listreviter_methods, /* tp_methods */ listreviter_methods, /* tp_methods */
0, 0,
}; };
@ -3422,23 +3438,25 @@ list___reversed___impl(PyListObject *self)
} }
static void static void
listreviter_dealloc(listreviterobject *it) listreviter_dealloc(PyObject *self)
{ {
listreviterobject *it = (listreviterobject *)self;
PyObject_GC_UnTrack(it); PyObject_GC_UnTrack(it);
Py_XDECREF(it->it_seq); Py_XDECREF(it->it_seq);
PyObject_GC_Del(it); PyObject_GC_Del(it);
} }
static int static int
listreviter_traverse(listreviterobject *it, visitproc visit, void *arg) listreviter_traverse(PyObject *it, visitproc visit, void *arg)
{ {
Py_VISIT(it->it_seq); Py_VISIT(((listreviterobject *)it)->it_seq);
return 0; return 0;
} }
static PyObject * static PyObject *
listreviter_next(listreviterobject *it) listreviter_next(PyObject *self)
{ {
listreviterobject *it = (listreviterobject *)self;
PyObject *item; PyObject *item;
Py_ssize_t index; Py_ssize_t index;
PyListObject *seq; PyListObject *seq;
@ -3463,8 +3481,9 @@ listreviter_next(listreviterobject *it)
} }
static PyObject * static PyObject *
listreviter_len(listreviterobject *it, PyObject *Py_UNUSED(ignored)) listreviter_len(PyObject *self, PyObject *Py_UNUSED(ignored))
{ {
listreviterobject *it = (listreviterobject *)self;
Py_ssize_t len = it->it_index + 1; Py_ssize_t len = it->it_index + 1;
if (it->it_seq == NULL || PyList_GET_SIZE(it->it_seq) < len) if (it->it_seq == NULL || PyList_GET_SIZE(it->it_seq) < len)
len = 0; len = 0;
@ -3472,14 +3491,15 @@ listreviter_len(listreviterobject *it, PyObject *Py_UNUSED(ignored))
} }
static PyObject * static PyObject *
listreviter_reduce(listreviterobject *it, PyObject *Py_UNUSED(ignored)) listreviter_reduce(PyObject *it, PyObject *Py_UNUSED(ignored))
{ {
return listiter_reduce_general(it, 0); return listiter_reduce_general(it, 0);
} }
static PyObject * static PyObject *
listreviter_setstate(listreviterobject *it, PyObject *state) listreviter_setstate(PyObject *self, PyObject *state)
{ {
listreviterobject *it = (listreviterobject *)self;
Py_ssize_t index = PyLong_AsSsize_t(state); Py_ssize_t index = PyLong_AsSsize_t(state);
if (index == -1 && PyErr_Occurred()) if (index == -1 && PyErr_Occurred())
return NULL; return NULL;