gh-111789: Use PyDict_GetItemRef() in Objects/

Objects/abstract.c

@@ -204,12 +204,7 @@ int
 PyMapping_GetOptionalItem(PyObject *obj, PyObject *key, PyObject **result)
 {
     if (PyDict_CheckExact(obj)) {
-        *result = PyDict_GetItemWithError(obj, key);  /* borrowed */
-        if (*result) {
-            Py_INCREF(*result);
-            return 1;
-        }
-        return PyErr_Occurred() ? -1 : 0;
+        return PyDict_GetItemRef(obj, key, result);
     }
 
     *result = PyObject_GetItem(obj, key);

Objects/funcobject.c

@@ -92,8 +92,8 @@ PyFunction_ClearWatcher(int watcher_id)
 PyFunctionObject *
 _PyFunction_FromConstructor(PyFrameConstructor *constr)
 {
-    PyObject *module = Py_XNewRef(PyDict_GetItemWithError(constr->fc_globals, &_Py_ID(__name__)));
-    if (!module && PyErr_Occurred()) {
+    PyObject *module;
+    if (PyDict_GetItemRef(constr->fc_globals, &_Py_ID(__name__), &module) < 0) {
         return NULL;
     }
 
@@ -158,12 +158,11 @@ PyFunction_NewWithQualName(PyObject *code, PyObject *globals, PyObject *qualname
     Py_INCREF(doc);
 
     // __module__: Use globals['__name__'] if it exists, or NULL.
-    PyObject *module = PyDict_GetItemWithError(globals, &_Py_ID(__name__));
+    PyObject *module;
     PyObject *builtins = NULL;
-    if (module == NULL && _PyErr_Occurred(tstate)) {
+    if (PyDict_GetItemRef(globals, &_Py_ID(__name__), &module) < 0) {
         goto error;
     }
-    Py_XINCREF(module);
 
     builtins = _PyEval_BuiltinsFromGlobals(tstate, globals); // borrowed ref
     if (builtins == NULL) {

Objects/moduleobject.c

@@ -522,6 +522,7 @@ PyModule_GetNameObject(PyObject *mod)
     }
     PyObject *name;
     if (PyDict_GetItemRef(dict, &_Py_ID(__name__), &name) <= 0) {
+        // error or not found
         goto error;
     }
     if (!PyUnicode_Check(name)) {
@@ -562,6 +563,7 @@ PyModule_GetFilenameObject(PyObject *mod)
     }
     PyObject *fileobj;
     if (PyDict_GetItemRef(dict, &_Py_ID(__file__), &fileobj) <= 0) {
+        // error or not found
         goto error;
     }
     if (!PyUnicode_Check(fileobj)) {
@@ -816,28 +818,28 @@ _Py_module_getattro_impl(PyModuleObject *m, PyObject *name, int suppress)
         PyErr_Clear();
     }
     assert(m->md_dict != NULL);
-    getattr = PyDict_GetItemWithError(m->md_dict, &_Py_ID(__getattr__));
+    if (PyDict_GetItemRef(m->md_dict, &_Py_ID(__getattr__), &getattr) < 0) {
+        return NULL;
+    }
     if (getattr) {
         PyObject *result = PyObject_CallOneArg(getattr, name);
         if (result == NULL && suppress == 1 && PyErr_ExceptionMatches(PyExc_AttributeError)) {
             // suppress AttributeError
             PyErr_Clear();
         }
+        Py_DECREF(getattr);
         return result;
     }
-    if (PyErr_Occurred()) {
+    if (PyDict_GetItemRef(m->md_dict, &_Py_ID(__name__), &mod_name) < 0) {
         return NULL;
     }
-    mod_name = PyDict_GetItemWithError(m->md_dict, &_Py_ID(__name__));
     if (mod_name && PyUnicode_Check(mod_name)) {
-        Py_INCREF(mod_name);
-        PyObject *spec = PyDict_GetItemWithError(m->md_dict, &_Py_ID(__spec__));
-        if (spec == NULL && PyErr_Occurred()) {
+        PyObject *spec;
+        if (PyDict_GetItemRef(m->md_dict, &_Py_ID(__spec__), &spec) < 0) {
             Py_DECREF(mod_name);
             return NULL;
         }
         if (suppress != 1) {
-            Py_XINCREF(spec);
             if (_PyModuleSpec_IsInitializing(spec)) {
                 PyErr_Format(PyExc_AttributeError,
                                 "partially initialized "
@@ -856,14 +858,12 @@ _Py_module_getattro_impl(PyModuleObject *m, PyObject *name, int suppress)
                                 "module '%U' has no attribute '%U'",
                                 mod_name, name);
             }
-            Py_XDECREF(spec);
         }
+        Py_XDECREF(spec);
         Py_DECREF(mod_name);
         return NULL;
     }
-    else if (PyErr_Occurred()) {
-        return NULL;
-    }
+    Py_XDECREF(mod_name);
     if (suppress != 1) {
         PyErr_Format(PyExc_AttributeError,
                     "module has no attribute '%U'", name);
@@ -957,11 +957,8 @@ module_get_annotations(PyModuleObject *m, void *Py_UNUSED(ignored))
         return NULL;
     }
 
-    PyObject *annotations = PyDict_GetItemWithError(dict, &_Py_ID(__annotations__));
-    if (annotations) {
-        Py_INCREF(annotations);
-    }
-    else if (!PyErr_Occurred()) {
+    PyObject *annotations;
+    if (PyDict_GetItemRef(dict, &_Py_ID(__annotations__), &annotations) == 0) {
         annotations = PyDict_New();
         if (annotations) {
             int result = PyDict_SetItem(

Objects/object.c

@@ -1490,19 +1490,14 @@ _PyObject_GetMethod(PyObject *obj, PyObject *name, PyObject **method)
     }
     if (dict != NULL) {
         Py_INCREF(dict);
-        PyObject *attr = PyDict_GetItemWithError(dict, name);
-        if (attr != NULL) {
-            *method = Py_NewRef(attr);
+        if (PyDict_GetItemRef(dict, name, method) != 0) {
+            // found or error
             Py_DECREF(dict);
             Py_XDECREF(descr);
             return 0;
         }
+        // not found
         Py_DECREF(dict);
-
-        if (PyErr_Occurred()) {
-            Py_XDECREF(descr);
-            return 0;
-        }
     }
 
     if (meth_found) {
@@ -1607,21 +1602,17 @@ _PyObject_GenericGetAttrWithDict(PyObject *obj, PyObject *name,
     }
     if (dict != NULL) {
         Py_INCREF(dict);
-        res = PyDict_GetItemWithError(dict, name);
+        int rc = PyDict_GetItemRef(dict, name, &res);
+        Py_DECREF(dict);
         if (res != NULL) {
-            Py_INCREF(res);
-            Py_DECREF(dict);
             goto done;
         }
-        else {
-            Py_DECREF(dict);
-            if (PyErr_Occurred()) {
-                if (suppress && PyErr_ExceptionMatches(PyExc_AttributeError)) {
-                    PyErr_Clear();
-                }
-                else {
-                    goto done;
-                }
+        else if (rc < 0) {
+            if (suppress && PyErr_ExceptionMatches(PyExc_AttributeError)) {
+                PyErr_Clear();
+            }
+            else {
+                goto done;
             }
         }
     }