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Issue #19437: Use an identifier for "__name__" string in pickle to improve 

error handling

The following code didn't handle correctly the failure of
PyUnicode_InternFromString("__name__").

if (newobj_str == NULL) {
    newobj_str = PyUnicode_InternFromString("__newobj__");
    name_str = PyUnicode_InternFromString("__name__");
    if (newobj_str == NULL || name_str == NULL)
        return -1;
}
This commit is contained in:
Victor Stinner 2013-11-14 01:26:17 +01:00
parent c82729e44f
commit 804e05e800
1 changed files with 5 additions and 12 deletions
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17
Modules/_pickle.c
View File

@ -136,6 +136,7 @@ static PyObject *empty_tuple = NULL;
/* For looking up name pairs in copyreg._extension_registry. */
static PyObject *two_tuple = NULL;
_Py_IDENTIFIER(__name__);
_Py_IDENTIFIER(modules);
static int
@ -2599,7 +2600,6 @@ save_dict(PicklerObject *self, PyObject *obj)
static int
save_global(PicklerObject *self, PyObject *obj, PyObject *name)
{
static PyObject *name_str = NULL;
PyObject *global_name = NULL;
PyObject *module_name = NULL;
PyObject *module = NULL;
@ -2608,18 +2608,12 @@ save_global(PicklerObject *self, PyObject *obj, PyObject *name)
const char global_op = GLOBAL;
if (name_str == NULL) {
name_str = PyUnicode_InternFromString("__name__");
if (name_str == NULL)
goto error;
}
if (name) {
global_name = name;
Py_INCREF(global_name);
}
else {
global_name = PyObject_GetAttr(obj, name_str);
global_name = _PyObject_GetAttrId(obj, &PyId___name__);
if (global_name == NULL)
goto error;
}
@ -3016,17 +3010,16 @@ save_reduce(PicklerObject *self, PyObject *args, PyObject *obj)
/* Protocol 2 special case: if callable's name is __newobj__, use
NEWOBJ. */
if (use_newobj) {
static PyObject *newobj_str = NULL, *name_str = NULL;
static PyObject *newobj_str = NULL;
PyObject *name;
if (newobj_str == NULL) {
newobj_str = PyUnicode_InternFromString("__newobj__");
name_str = PyUnicode_InternFromString("__name__");
if (newobj_str == NULL || name_str == NULL)
if (newobj_str == NULL)
return -1;
}
name = PyObject_GetAttr(callable, name_str);
name = _PyObject_GetAttrId(callable, &PyId___name__);
if (name == NULL) {
if (PyErr_ExceptionMatches(PyExc_AttributeError))
PyErr_Clear();