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gh-118609: Add proper error check for framelocalsproxy #118615

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Merged
gvanrossum merged 2 commits into from
May 6, 2024
Merged

gh-118609: Add proper error check for framelocalsproxy #118615

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c3ec341
Add proper error check for framelocalsproxy
gaogaotiantian May 5, 2024
2d2b9d0
Reorder statements
gaogaotiantian May 6, 2024
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145 changes: 99 additions & 46 deletions 145 Objects/frameobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -189,7 +189,7 @@ framelocalsproxy_setitem(PyObject *self, PyObject *key, PyObject *value)

assert(PyDict_Check(extra));

return PyDict_SetItem(extra, key, value) < 0;
return PyDict_SetItem(extra, key, value);
}

static int
Expand All @@ -200,19 +200,19 @@ framelocalsproxy_merge(PyObject* self, PyObject* other)
}

PyObject *keys = PyMapping_Keys(other);
PyObject *iter = NULL;
PyObject *key = NULL;
PyObject *value = NULL;

assert(keys != NULL);
if (keys == NULL) {
return -1;
}

iter = PyObject_GetIter(keys);
PyObject *iter = PyObject_GetIter(keys);
Py_DECREF(keys);

if (iter == NULL) {
return -1;
}

PyObject *key = NULL;
PyObject *value = NULL;

while ((key = PyIter_Next(iter)) != NULL) {
value = PyObject_GetItem(other, key);
if (value == NULL) {
Expand All @@ -238,12 +238,11 @@ framelocalsproxy_merge(PyObject* self, PyObject* other)
}

static PyObject *
framelocalsproxy_keys(PyObject *self, PyObject *__unused)
framelocalsproxy_keys(PyObject *self, void *Py_UNUSED(ignored))
{
PyObject *names = PyList_New(0);
PyFrameObject *frame = ((PyFrameLocalsProxyObject*)self)->frame;
PyCodeObject *co = _PyFrame_GetCode(frame->f_frame);

PyObject *names = PyList_New(0);
if (names == NULL) {
return NULL;
}
Expand All @@ -260,12 +259,13 @@ framelocalsproxy_keys(PyObject *self, PyObject *__unused)
}

// Iterate through the extra locals
Py_ssize_t i = 0;
PyObject *key = NULL;
PyObject *value = NULL;

if (frame->f_extra_locals) {
assert(PyDict_Check(frame->f_extra_locals));

Py_ssize_t i = 0;
PyObject *key = NULL;
PyObject *value = NULL;

while (PyDict_Next(frame->f_extra_locals, &i, &key, &value)) {
if (PyList_Append(names, key) < 0) {
Py_DECREF(names);
Expand Down Expand Up @@ -341,9 +341,16 @@ framelocalsproxy_richcompare(PyObject *self, PyObject *other, int op)
}
} else if (PyDict_Check(other)) {
PyObject *dct = PyDict_New();
PyObject *result = NULL;
PyDict_Update(dct, self);
result = PyObject_RichCompare(dct, other, op);
if (dct == NULL) {
return NULL;
}

if (PyDict_Update(dct, self) < 0) {
Py_DECREF(dct);
return NULL;
}

PyObject *result = PyObject_RichCompare(dct, other, op);
Py_DECREF(dct);
return result;
}
Expand All @@ -360,14 +367,22 @@ framelocalsproxy_repr(PyObject *self)
}

PyObject *dct = PyDict_New();
PyObject *repr = NULL;
if (dct == NULL) {
Py_ReprLeave(self);
return NULL;
}

if (PyDict_Update(dct, self) == 0) {
repr = PyObject_Repr(dct);
if (PyDict_Update(dct, self) < 0) {
Py_DECREF(dct);
Py_ReprLeave(self);
return NULL;
}
Py_ReprLeave(self);

PyObject *repr = PyObject_Repr(dct);
Py_DECREF(dct);

Py_ReprLeave(self);

return repr;
}

Expand All @@ -379,6 +394,10 @@ framelocalsproxy_or(PyObject *self, PyObject *other)
}

PyObject *result = PyDict_New();
if (result == NULL) {
return NULL;
}

if (PyDict_Update(result, self) < 0) {
Py_DECREF(result);
return NULL;
Expand Down Expand Up @@ -407,60 +426,90 @@ framelocalsproxy_inplace_or(PyObject *self, PyObject *other)
}

static PyObject*
framelocalsproxy_values(PyObject *self, PyObject *__unused)
framelocalsproxy_values(PyObject *self, void *Py_UNUSED(ignored))
{
PyObject *values = PyList_New(0);
PyFrameObject *frame = ((PyFrameLocalsProxyObject*)self)->frame;
PyCodeObject *co = _PyFrame_GetCode(frame->f_frame);
PyObject *values = PyList_New(0);
if (values == NULL) {
return NULL;
}

for (int i = 0; i < co->co_nlocalsplus; i++) {
PyObject *value = framelocalsproxy_getval(frame->f_frame, co, i);
if (value) {
PyList_Append(values, value);
if (PyList_Append(values, value) < 0) {
Py_DECREF(values);
return NULL;
}
}
}

// Iterate through the extra locals
Py_ssize_t j = 0;
PyObject *key = NULL;
PyObject *value = NULL;

if (frame->f_extra_locals) {
Py_ssize_t j = 0;
PyObject *key = NULL;
PyObject *value = NULL;
while (PyDict_Next(frame->f_extra_locals, &j, &key, &value)) {
PyList_Append(values, value);
if (PyList_Append(values, value) < 0) {
Py_DECREF(values);
return NULL;
}
}
}

return values;
}

static PyObject *
framelocalsproxy_items(PyObject *self, PyObject *__unused)
framelocalsproxy_items(PyObject *self, void *Py_UNUSED(ignored))
{
PyObject *items = PyList_New(0);
PyFrameObject *frame = ((PyFrameLocalsProxyObject*)self)->frame;
PyCodeObject *co = _PyFrame_GetCode(frame->f_frame);
PyObject *items = PyList_New(0);
if (items == NULL) {
return NULL;
}

for (int i = 0; i < co->co_nlocalsplus; i++) {
PyObject *name = PyTuple_GET_ITEM(co->co_localsplusnames, i);
PyObject *value = framelocalsproxy_getval(frame->f_frame, co, i);

if (value) {
PyObject *pair = PyTuple_Pack(2, name, value);
PyList_Append(items, pair);
if (pair == NULL) {
Py_DECREF(items);
return NULL;
}

if (PyList_Append(items, pair) < 0) {
Py_DECREF(items);
Py_DECREF(pair);
return NULL;
}

Py_DECREF(pair);
}
}

// Iterate through the extra locals
Py_ssize_t j = 0;
PyObject *key = NULL;
PyObject *value = NULL;

if (frame->f_extra_locals) {
Py_ssize_t j = 0;
PyObject *key = NULL;
PyObject *value = NULL;
while (PyDict_Next(frame->f_extra_locals, &j, &key, &value)) {
PyObject *pair = PyTuple_Pack(2, key, value);
PyList_Append(items, pair);
if (pair == NULL) {
Py_DECREF(items);
return NULL;
}

if (PyList_Append(items, pair) < 0) {
Py_DECREF(items);
Py_DECREF(pair);
return NULL;
}

Py_DECREF(pair);
}
}
Expand Down Expand Up @@ -584,7 +633,7 @@ framelocalsproxy_setdefault(PyObject* self, PyObject *const *args, Py_ssize_t na
}

static PyObject*
framelocalsproxy_reversed(PyObject *self, PyObject *__unused)
framelocalsproxy_reversed(PyObject *self, void *Py_UNUSED(ignored))
{
PyObject *result = framelocalsproxy_keys(self, NULL);

Expand Down Expand Up @@ -615,19 +664,19 @@ static PyMethodDef framelocalsproxy_methods[] = {
NULL},
{"__getitem__", framelocalsproxy_getitem, METH_O | METH_COEXIST,
NULL},
{"__reversed__", framelocalsproxy_reversed, METH_NOARGS,
{"update", framelocalsproxy_update, METH_O,
NULL},
{"keys", framelocalsproxy_keys, METH_NOARGS,
{"__reversed__", _PyCFunction_CAST(framelocalsproxy_reversed), METH_NOARGS,
NULL},
{"values", framelocalsproxy_values, METH_NOARGS,
{"keys", _PyCFunction_CAST(framelocalsproxy_keys), METH_NOARGS,
NULL},
{"items", framelocalsproxy_items, METH_NOARGS,
{"values", _PyCFunction_CAST(framelocalsproxy_values), METH_NOARGS,
NULL},
{"update", framelocalsproxy_update, METH_O,
{"items", _PyCFunction_CAST(framelocalsproxy_items), METH_NOARGS,
NULL},
{"get", _PyCFunction_CAST(framelocalsproxy_get), METH_FASTCALL,
{"get", _PyCFunction_CAST(framelocalsproxy_get), METH_FASTCALL,
NULL},
{"setdefault", _PyCFunction_CAST(framelocalsproxy_setdefault), METH_FASTCALL,
{"setdefault", _PyCFunction_CAST(framelocalsproxy_setdefault), METH_FASTCALL,
NULL},
{NULL, NULL} /* sentinel */
};
Expand Down Expand Up @@ -657,6 +706,10 @@ PyObject *
_PyFrameLocalsProxy_New(PyFrameObject *frame)
{
PyObject* args = PyTuple_Pack(1, frame);
if (args == NULL) {
return NULL;
}

PyObject* proxy = (PyObject*)framelocalsproxy_new(&PyFrameLocalsProxy_Type, args, NULL);
Py_DECREF(args);
return proxy;
Expand Down
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