Add _PY_FASTCALL_SMALL_STACK constant
Issue #28870: Add a new _PY_FASTCALL_SMALL_STACK constant, size of "small
stacks" allocated on the C stack to pass positional arguments to
_PyObject_FastCall().
_PyObject_Call_Prepend() now uses a small stack of 5 arguments (40 bytes)
instead of 8 (64 bytes), since it is modified to use _PY_FASTCALL_SMALL_STACK.
diff --git a/Objects/abstract.c b/Objects/abstract.c
index 7da97ac..351c6eb 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -2337,7 +2337,7 @@
_PyObject_Call_Prepend(PyObject *callable,
PyObject *obj, PyObject *args, PyObject *kwargs)
{
- PyObject *small_stack[8];
+ PyObject *small_stack[_PY_FASTCALL_SMALL_STACK];
PyObject **stack;
Py_ssize_t argcount;
PyObject *result;
@@ -2523,7 +2523,7 @@
_PyObject_CallFunctionVa(PyObject *callable, const char *format,
va_list va, int is_size_t)
{
- PyObject* small_stack[5];
+ PyObject* small_stack[_PY_FASTCALL_SMALL_STACK];
const Py_ssize_t small_stack_len = Py_ARRAY_LENGTH(small_stack);
PyObject **stack;
Py_ssize_t nargs, i;
@@ -2704,7 +2704,7 @@
PyObject *
_PyObject_VaCallFunctionObjArgs(PyObject *callable, va_list vargs)
{
- PyObject *small_stack[5];
+ PyObject *small_stack[_PY_FASTCALL_SMALL_STACK];
PyObject **stack;
Py_ssize_t nargs;
PyObject *result;