mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-10-28 01:00:34 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 11

bpo-32571: Avoid raising unneeded AttributeError and silencing it in C code (GH-5222)

Browse source 
Add two new private APIs: _PyObject_LookupAttr() and _PyObject_LookupAttrId()
This commit is contained in:
Serhiy Storchaka 2018-01-25 10:49:40 +02:00 • committed by INADA Naoki
parent 2b822a0bb1
commit f320be77ff
22 changed files with 1455 additions and 1442 deletions
Download patch file Download diff file Expand all files Collapse all files

81
Parser/asdl_c.py
View file

@ -497,11 +497,27 @@ class Obj2ModVisitor(PickleVisitor):
def visitField(self, field, name, sum=None, prod=None, depth=0):
ctype = get_c_type(field.type)
self.emit("if (_PyObject_LookupAttrId(obj, &PyId_%s, &tmp) < 0) {" % field.name, depth)
self.emit("return 1;", depth+1)
self.emit("}", depth)
if not field.opt:
self.emit("tmp = _PyObject_GetAttrId(obj, &PyId_%s);" % field.name, depth)
self.emit("if (tmp == NULL) {", depth)
message = "required field \\\"%s\\\" missing from %s" % (field.name, name)
format = "PyErr_SetString(PyExc_TypeError, \"%s\");"
self.emit(format % message, depth+1, reflow=False)
self.emit("return 1;", depth+1)
else:
self.emit("tmp = get_not_none(obj, &PyId_%s);" % field.name, depth)
self.emit("if (tmp != NULL) {", depth)
self.emit("if (tmp == NULL || tmp == Py_None) {", depth)
self.emit("Py_CLEAR(tmp);", depth+1)
if self.isNumeric(field):
self.emit("%s = 0;" % field.name, depth+1)
elif not self.isSimpleType(field):
self.emit("%s = NULL;" % field.name, depth+1)
else:
raise TypeError("could not determine the default value for %s" % field.name)
self.emit("}", depth)
self.emit("else {", depth)
self.emit("int res;", depth+1)
if field.seq:
self.emit("Py_ssize_t len;", depth+1)
@ -539,25 +555,6 @@ class Obj2ModVisitor(PickleVisitor):
self.emit("if (res != 0) goto failed;", depth+1)
self.emit("Py_CLEAR(tmp);", depth+1)
if not field.opt:
self.emit("} else {", depth)
self.emit("if (PyErr_ExceptionMatches(PyExc_AttributeError)) {", depth+1)
message = "required field \\\"%s\\\" missing from %s" % (field.name, name)
format = "PyErr_SetString(PyExc_TypeError, \"%s\");"
self.emit(format % message, depth+2, reflow=False)
self.emit("}", depth+1)
self.emit("return 1;", depth+1)
else:
self.emit("} else if (PyErr_Occurred()) {", depth)
self.emit("return 1;", depth+1)
self.emit("} else {", depth)
if self.isNumeric(field):
self.emit("%s = 0;" % field.name, depth+1)
elif not self.isSimpleType(field):
self.emit("%s = NULL;" % field.name, depth+1)
else:
raise TypeError("could not determine the default value for %s" % field.name)
self.emit("}", depth)
@ -662,18 +659,14 @@ ast_type_init(PyObject *self, PyObject *args, PyObject *kw)
Py_ssize_t i, numfields = 0;
int res = -1;
PyObject *key, *value, *fields;
fields = _PyObject_GetAttrId((PyObject*)Py_TYPE(self), &PyId__fields);
if (_PyObject_LookupAttrId((PyObject*)Py_TYPE(self), &PyId__fields, &fields) < 0) {
goto cleanup;
}
if (fields) {
numfields = PySequence_Size(fields);
if (numfields == -1)
goto cleanup;
}
else if (PyErr_ExceptionMatches(PyExc_AttributeError)) {
PyErr_Clear();
}
else {
goto cleanup;
}
res = 0; /* if no error occurs, this stays 0 to the end */
if (numfields < PyTuple_GET_SIZE(args)) {
@ -713,19 +706,13 @@ ast_type_init(PyObject *self, PyObject *args, PyObject *kw)
static PyObject *
ast_type_reduce(PyObject *self, PyObject *unused)
{
PyObject *res;
_Py_IDENTIFIER(__dict__);
PyObject *dict = _PyObject_GetAttrId(self, &PyId___dict__);
if (dict == NULL) {
if (PyErr_ExceptionMatches(PyExc_AttributeError))
PyErr_Clear();
else
return NULL;
PyObject *dict;
if (_PyObject_LookupAttrId(self, &PyId___dict__, &dict) < 0) {
return NULL;
}
if (dict) {
res = Py_BuildValue("O()O", Py_TYPE(self), dict);
Py_DECREF(dict);
return res;
return Py_BuildValue("O()N", Py_TYPE(self), dict);
}
return Py_BuildValue("O()", Py_TYPE(self));
}
@ -965,22 +952,6 @@ static int add_ast_fields(void)
return 0;
}
static PyObject *get_not_none(PyObject *obj, _Py_Identifier *id)
{
PyObject *attr = _PyObject_GetAttrId(obj, id);
if (!attr) {
if (PyErr_ExceptionMatches(PyExc_AttributeError)) {
PyErr_Clear();
}
return NULL;
}
else if (attr == Py_None) {
Py_DECREF(attr);
return NULL;
}
return attr;
}
""", 0, reflow=False)
self.emit("static int init_types(void)",0)