bpo-32240: Add the const qualifier to declarations of PyObject* array arguments. (#4746)

Objects/call.c

@@ -81,7 +81,7 @@ _Py_CheckFunctionResult(PyObject *callable, PyObject *result, const char *where)
 /* --- Core PyObject call functions ------------------------------- */
 
 PyObject *
-_PyObject_FastCallDict(PyObject *callable, PyObject **args, Py_ssize_t nargs,
+_PyObject_FastCallDict(PyObject *callable, PyObject *const *args, Py_ssize_t nargs,
                        PyObject *kwargs)
 {
     /* _PyObject_FastCallDict() must not be called with an exception set,
@@ -134,7 +134,7 @@ _PyObject_FastCallDict(PyObject *callable, PyObject **args, Py_ssize_t nargs,
 
 
 PyObject *
-_PyObject_FastCallKeywords(PyObject *callable, PyObject **stack, Py_ssize_t nargs,
+_PyObject_FastCallKeywords(PyObject *callable, PyObject *const *stack, Py_ssize_t nargs,
                            PyObject *kwnames)
 {
     /* _PyObject_FastCallKeywords() must not be called with an exception set,
@@ -254,7 +254,7 @@ PyObject_Call(PyObject *callable, PyObject *args, PyObject *kwargs)
 /* --- PyFunction call functions ---------------------------------- */
 
 static PyObject* _Py_HOT_FUNCTION
-function_code_fastcall(PyCodeObject *co, PyObject **args, Py_ssize_t nargs,
+function_code_fastcall(PyCodeObject *co, PyObject *const *args, Py_ssize_t nargs,
                        PyObject *globals)
 {
     PyFrameObject *f;
@@ -296,7 +296,7 @@ function_code_fastcall(PyCodeObject *co, PyObject **args, Py_ssize_t nargs,
 
 
 PyObject *
-_PyFunction_FastCallDict(PyObject *func, PyObject **args, Py_ssize_t nargs,
+_PyFunction_FastCallDict(PyObject *func, PyObject *const *args, Py_ssize_t nargs,
                          PyObject *kwargs)
 {
     PyCodeObject *co = (PyCodeObject *)PyFunction_GET_CODE(func);
@@ -383,7 +383,7 @@ _PyFunction_FastCallDict(PyObject *func, PyObject **args, Py_ssize_t nargs,
 }
 
 PyObject *
-_PyFunction_FastCallKeywords(PyObject *func, PyObject **stack,
+_PyFunction_FastCallKeywords(PyObject *func, PyObject *const *stack,
                              Py_ssize_t nargs, PyObject *kwnames)
 {
     PyCodeObject *co = (PyCodeObject *)PyFunction_GET_CODE(func);
@@ -443,8 +443,9 @@ _PyFunction_FastCallKeywords(PyObject *func, PyObject **stack,
 /* --- PyCFunction call functions --------------------------------- */
 
 PyObject *
-_PyMethodDef_RawFastCallDict(PyMethodDef *method, PyObject *self, PyObject **args,
-                             Py_ssize_t nargs, PyObject *kwargs)
+_PyMethodDef_RawFastCallDict(PyMethodDef *method, PyObject *self,
+                             PyObject *const *args, Py_ssize_t nargs,
+                             PyObject *kwargs)
 {
     /* _PyMethodDef_RawFastCallDict() must not be called with an exception set,
        because it can clear it (directly or indirectly) and so the
@@ -532,7 +533,7 @@ _PyMethodDef_RawFastCallDict(PyMethodDef *method, PyObject *self, PyObject **arg
 
     case METH_FASTCALL | METH_KEYWORDS:
     {
-        PyObject **stack;
+        PyObject *const *stack;
         PyObject *kwnames;
         _PyCFunctionFastWithKeywords fastmeth = (_PyCFunctionFastWithKeywords)meth;
 
@@ -542,7 +543,7 @@ _PyMethodDef_RawFastCallDict(PyMethodDef *method, PyObject *self, PyObject **arg
 
         result = (*fastmeth) (self, stack, nargs, kwnames);
         if (stack != args) {
-            PyMem_Free(stack);
+            PyMem_Free((PyObject **)stack);
         }
         Py_XDECREF(kwnames);
         break;
@@ -569,7 +570,8 @@ exit:
 
 
 PyObject *
-_PyCFunction_FastCallDict(PyObject *func, PyObject **args, Py_ssize_t nargs,
+_PyCFunction_FastCallDict(PyObject *func,
+                          PyObject *const *args, Py_ssize_t nargs,
                           PyObject *kwargs)
 {
     PyObject *result;
@@ -586,8 +588,9 @@ _PyCFunction_FastCallDict(PyObject *func, PyObject **args, Py_ssize_t nargs,
 
 
 PyObject *
-_PyMethodDef_RawFastCallKeywords(PyMethodDef *method, PyObject *self, PyObject **args,
-                                 Py_ssize_t nargs, PyObject *kwnames)
+_PyMethodDef_RawFastCallKeywords(PyMethodDef *method, PyObject *self,
+                                 PyObject *const *args, Py_ssize_t nargs,
+                                 PyObject *kwnames)
 {
     /* _PyMethodDef_RawFastCallKeywords() must not be called with an exception set,
        because it can clear it (directly or indirectly) and so the
@@ -715,8 +718,9 @@ exit:
 
 
 PyObject *
-_PyCFunction_FastCallKeywords(PyObject *func, PyObject **args,
-                              Py_ssize_t nargs, PyObject *kwnames)
+_PyCFunction_FastCallKeywords(PyObject *func,
+                              PyObject *const *args, Py_ssize_t nargs,
+                              PyObject *kwnames)
 {
     PyObject *result;
 
@@ -834,8 +838,8 @@ PyObject_CallObject(PyObject *callable, PyObject *args)
 /* Positional arguments are obj followed by args:
    call callable(obj, *args, **kwargs) */
 PyObject *
-_PyObject_FastCall_Prepend(PyObject *callable,
-                           PyObject *obj, PyObject **args, Py_ssize_t nargs)
+_PyObject_FastCall_Prepend(PyObject *callable, PyObject *obj,
+                           PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *small_stack[_PY_FASTCALL_SMALL_STACK];
     PyObject **args2;
@@ -1268,7 +1272,7 @@ PyObject_CallFunctionObjArgs(PyObject *callable, ...)
 /* Issue #29234: Inlining _PyStack_AsTuple() into callers increases their
    stack consumption, Disable inlining to optimize the stack consumption. */
 PyObject* _Py_NO_INLINE
-_PyStack_AsTuple(PyObject **stack, Py_ssize_t nargs)
+_PyStack_AsTuple(PyObject *const *stack, Py_ssize_t nargs)
 {
     PyObject *args;
     Py_ssize_t i;
@@ -1288,7 +1292,7 @@ _PyStack_AsTuple(PyObject **stack, Py_ssize_t nargs)
 
 
 PyObject*
-_PyStack_AsTupleSlice(PyObject **stack, Py_ssize_t nargs,
+_PyStack_AsTupleSlice(PyObject *const *stack, Py_ssize_t nargs,
                       Py_ssize_t start, Py_ssize_t end)
 {
     PyObject *args;
@@ -1313,7 +1317,7 @@ _PyStack_AsTupleSlice(PyObject **stack, Py_ssize_t nargs,
 
 
 PyObject *
-_PyStack_AsDict(PyObject **values, PyObject *kwnames)
+_PyStack_AsDict(PyObject *const *values, PyObject *kwnames)
 {
     Py_ssize_t nkwargs;
     PyObject *kwdict;
@@ -1340,8 +1344,8 @@ _PyStack_AsDict(PyObject **values, PyObject *kwnames)
 
 
 int
-_PyStack_UnpackDict(PyObject **args, Py_ssize_t nargs, PyObject *kwargs,
-                    PyObject ***p_stack, PyObject **p_kwnames)
+_PyStack_UnpackDict(PyObject *const *args, Py_ssize_t nargs, PyObject *kwargs,
+                    PyObject *const **p_stack, PyObject **p_kwnames)
 {
     PyObject **stack, **kwstack;
     Py_ssize_t nkwargs;