Issue #28858: Remove _PyObject_CallArg1() macro

Replace
   _PyObject_CallArg1(func, arg)
with
   PyObject_CallFunctionObjArgs(func, arg, NULL)

Using the _PyObject_CallArg1() macro increases the usage of the C stack, which
was unexpected and unwanted. PyObject_CallFunctionObjArgs() doesn't have this
issue.

15 files changed, 25 insertions, 26 deletions

diff --git a/Include/abstract.h b/Include/abstract.h
index 900ef23..3dfac65 100644
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -338,10 +338,7 @@ xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx*/
     _PyObject_FastCallDict((func), (args), (nargs), NULL)
 
 #define _PyObject_CallNoArg(func) \
-    _PyObject_FastCall((func), NULL, 0)
-
-#define _PyObject_CallArg1(func, arg) \
-    _PyObject_FastCall((func), (PyObject **)&(arg), 1)
+    _PyObject_FastCallDict((func), NULL, 0, NULL)
 
     PyAPI_FUNC(PyObject *) _PyObject_Call_Prepend(PyObject *func,
                                                   PyObject *obj, PyObject *args,
diff --git a/Modules/_asynciomodule.c b/Modules/_asynciomodule.c
index 4e8f74a..ea02a5e 100644
--- a/Modules/_asynciomodule.c
+++ b/Modules/_asynciomodule.c
@@ -257,7 +257,7 @@ future_get_result(FutureObj *fut, PyObject **result)
             return -1;
         }
 
-        exc = _PyObject_CallArg1(asyncio_InvalidStateError, msg);
+        exc = PyObject_CallFunctionObjArgs(asyncio_InvalidStateError, msg, NULL);
         Py_DECREF(msg);
         if (exc == NULL) {
             return -1;
@@ -835,7 +835,7 @@ FutureObj_finalize(FutureObj *fut)
 
     func = _PyObject_GetAttrId(fut->fut_loop, &PyId_call_exception_handler);
     if (func != NULL) {
-        res = _PyObject_CallArg1(func, context);
+        res = PyObject_CallFunctionObjArgs(func, context, NULL);
         if (res == NULL) {
             PyErr_WriteUnraisable(func);
         }
@@ -1731,7 +1731,7 @@ TaskObj_finalize(TaskObj *task)
 
     func = _PyObject_GetAttrId(task->task_loop, &PyId_call_exception_handler);
     if (func != NULL) {
-        res = _PyObject_CallArg1(func, context);
+        res = PyObject_CallFunctionObjArgs(func, context, NULL);
         if (res == NULL) {
             PyErr_WriteUnraisable(func);
         }
diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c
index cbf5b50..b8b7584 100644
--- a/Modules/_collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -538,7 +538,8 @@ deque_copy(PyObject *deque)
         return NULL;
     }
     if (old_deque->maxlen < 0)
-        return _PyObject_CallArg1((PyObject *)(Py_TYPE(deque)), deque);
+        return PyObject_CallFunctionObjArgs((PyObject *)(Py_TYPE(deque)),
+                                            deque, NULL);
     else
         return PyObject_CallFunction((PyObject *)(Py_TYPE(deque)), "Oi",
             deque, old_deque->maxlen, NULL);
diff --git a/Modules/_elementtree.c b/Modules/_elementtree.c
index 3837ff1..2e0cda7 100644
--- a/Modules/_elementtree.c
+++ b/Modules/_elementtree.c
@@ -2831,7 +2831,7 @@ expat_set_error(enum XML_Error error_code, Py_ssize_t line, Py_ssize_t column,
     if (errmsg == NULL)
         return;
 
-    error = _PyObject_CallArg1(st->parseerror_obj, errmsg);
+    error = PyObject_CallFunctionObjArgs(st->parseerror_obj, errmsg, NULL);
     Py_DECREF(errmsg);
     if (!error)
         return;
@@ -2894,7 +2894,7 @@ expat_default_handler(XMLParserObject* self, const XML_Char* data_in,
                 (TreeBuilderObject*) self->target, value
                 );
         else if (self->handle_data)
-            res = _PyObject_CallArg1(self->handle_data, value);
+            res = PyObject_CallFunctionObjArgs(self->handle_data, value, NULL);
         else
             res = NULL;
         Py_XDECREF(res);
@@ -3004,7 +3004,7 @@ expat_data_handler(XMLParserObject* self, const XML_Char* data_in,
         /* shortcut */
         res = treebuilder_handle_data((TreeBuilderObject*) self->target, data);
     else if (self->handle_data)
-        res = _PyObject_CallArg1(self->handle_data, data);
+        res = PyObject_CallFunctionObjArgs(self->handle_data, data, NULL);
     else
         res = NULL;
 
@@ -3031,7 +3031,7 @@ expat_end_handler(XMLParserObject* self, const XML_Char* tag_in)
     else if (self->handle_end) {
         tag = makeuniversal(self, tag_in);
         if (tag) {
-            res = _PyObject_CallArg1(self->handle_end, tag);
+            res = PyObject_CallFunctionObjArgs(self->handle_end, tag, NULL);
             Py_DECREF(tag);
         }
     }
@@ -3090,7 +3090,8 @@ expat_comment_handler(XMLParserObject* self, const XML_Char* comment_in)
     if (self->handle_comment) {
         comment = PyUnicode_DecodeUTF8(comment_in, strlen(comment_in), "strict");
         if (comment) {
-            res = _PyObject_CallArg1(self->handle_comment, comment);
+            res = PyObject_CallFunctionObjArgs(self->handle_comment,
+                                               comment, NULL);
             Py_XDECREF(res);
             Py_DECREF(comment);
         }
diff --git a/Modules/_pickle.c b/Modules/_pickle.c
index d6d5cca..78c206e 100644
--- a/Modules/_pickle.c
+++ b/Modules/_pickle.c
@@ -346,7 +346,7 @@ _Pickle_FastCall(PyObject *func, PyObject *obj)
 {
     PyObject *result;
 
-    result = _PyObject_CallArg1(func, obj);
+    result = PyObject_CallFunctionObjArgs(func, obj, NULL);
     Py_DECREF(obj);
     return result;
 }
diff --git a/Modules/_sre.c b/Modules/_sre.c
index 6e14901..4388494 100644
--- a/Modules/_sre.c
+++ b/Modules/_sre.c
@@ -1157,7 +1157,7 @@ pattern_subx(PatternObject* self, PyObject* ptemplate, PyObject* string,
             match = pattern_new_match(self, &state, 1);
             if (!match)
                 goto error;
-            item = _PyObject_CallArg1(filter, match);
+            item = PyObject_CallFunctionObjArgs(filter, match, NULL);
             Py_DECREF(match);
             if (!item)
                 goto error;
diff --git a/Modules/pyexpat.c b/Modules/pyexpat.c
index 541eee7..ece4d16 100644
--- a/Modules/pyexpat.c
+++ b/Modules/pyexpat.c
@@ -119,7 +119,7 @@ set_error(xmlparseobject *self, enum XML_Error code)
                                   XML_ErrorString(code), lineno, column);
     if (buffer == NULL)
         return NULL;
-    err = _PyObject_CallArg1(ErrorObject, buffer);
+    err = PyObject_CallFunctionObjArgs(ErrorObject, buffer, NULL);
     Py_DECREF(buffer);
     if (  err != NULL
           && set_error_attr(err, "code", code)
diff --git a/Objects/abstract.c b/Objects/abstract.c
index beb12c9..a6a58db 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -2496,7 +2496,7 @@ call_function_tail(PyObject *callable, PyObject *args)
     assert(args != NULL);
 
     if (!PyTuple_Check(args)) {
-        result = _PyObject_CallArg1(callable, args);
+        result = PyObject_CallFunctionObjArgs(callable, args, NULL);
     }
     else {
         result = PyObject_Call(callable, args, NULL);
diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index 32f8a89..fcdb5fd 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -146,7 +146,7 @@ PyFile_WriteObject(PyObject *v, PyObject *f, int flags)
         Py_DECREF(writer);
         return -1;
     }
-    result = _PyObject_CallArg1(writer, value);
+    result = PyObject_CallFunctionObjArgs(writer, value, NULL);
     Py_DECREF(value);
     Py_DECREF(writer);
     if (result == NULL)
diff --git a/Objects/genobject.c b/Objects/genobject.c
index bd7873b..59f53ce 100644
--- a/Objects/genobject.c
+++ b/Objects/genobject.c
@@ -1341,7 +1341,7 @@ async_gen_init_hooks(PyAsyncGenObject *o)
         PyObject *res;
 
         Py_INCREF(firstiter);
-        res = _PyObject_CallArg1(firstiter, o);
+        res = PyObject_CallFunctionObjArgs(firstiter, o, NULL);
         Py_DECREF(firstiter);
         if (res == NULL) {
             return 1;
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 0af1534..d9699ef 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -5873,7 +5873,7 @@ slot_sq_item(PyObject *self, Py_ssize_t i)
         goto error;
     }
 
-    retval = _PyObject_CallArg1(func, ival);
+    retval = PyObject_CallFunctionObjArgs(func, ival, NULL);
     Py_DECREF(func);
     Py_DECREF(ival);
     return retval;
@@ -5914,7 +5914,7 @@ slot_sq_contains(PyObject *self, PyObject *value)
         return -1;
     }
     if (func != NULL) {
-        res = _PyObject_CallArg1(func, value);
+        res = PyObject_CallFunctionObjArgs(func, value, NULL);
         Py_DECREF(func);
         if (res != NULL) {
             result = PyObject_IsTrue(res);
@@ -6284,7 +6284,7 @@ slot_tp_richcompare(PyObject *self, PyObject *other, int op)
         PyErr_Clear();
         Py_RETURN_NOTIMPLEMENTED;
     }
-    res = _PyObject_CallArg1(func, other);
+    res = PyObject_CallFunctionObjArgs(func, other, NULL);
     Py_DECREF(func);
     return res;
 }
diff --git a/Python/_warnings.c b/Python/_warnings.c
index cecc8ad..189bf70 100644
--- a/Python/_warnings.c
+++ b/Python/_warnings.c
@@ -476,7 +476,7 @@ warn_explicit(PyObject *category, PyObject *message,
     }
     else {
         text = message;
-        message = _PyObject_CallArg1(category, message);
+        message = PyObject_CallFunctionObjArgs(category, message, NULL);
         if (message == NULL)
             goto cleanup;
     }
diff --git a/Python/codecs.c b/Python/codecs.c
index 55f6ca8..688a40b 100644
--- a/Python/codecs.c
+++ b/Python/codecs.c
@@ -322,7 +322,7 @@ PyObject *codec_getstreamcodec(const char *encoding,
     if (errors != NULL)
         streamcodec = PyObject_CallFunction(codeccls, "Os", stream, errors);
     else
-        streamcodec = _PyObject_CallArg1(codeccls, stream);
+        streamcodec = PyObject_CallFunctionObjArgs(codeccls, stream, NULL);
     Py_DECREF(codecs);
     return streamcodec;
 }
diff --git a/Python/errors.c b/Python/errors.c
index 01304d2..74283c9 100644
--- a/Python/errors.c
+++ b/Python/errors.c
@@ -62,7 +62,7 @@ _PyErr_CreateException(PyObject *exception, PyObject *value)
         return PyObject_Call(exception, value, NULL);
     }
     else {
-        return _PyObject_CallArg1(exception, value);
+        return PyObject_CallFunctionObjArgs(exception, value, NULL);
     }
 }
 
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 98a6674..416a02b 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -2325,7 +2325,7 @@ sys_pyfile_write_unicode(PyObject *unicode, PyObject *file)
     if (writer == NULL)
         goto error;
 
-    result = _PyObject_CallArg1(writer, unicode);
+    result = PyObject_CallFunctionObjArgs(writer, unicode, NULL);
     if (result == NULL) {
         goto error;
     } else {