bpo-38644: Add _PyObject_Call() (GH-17089)

* Add pycore_call.h internal header file.
* Add _PyObject_Call(): PyObject_Call() with tstate
* Add _PyObject_CallNoArgTstate(): _PyObject_CallNoArg() with tstate
* Add _PyObject_FastCallDictTstate(): _PyObject_FastCallDict()
  with tstate
* _PyObject_Call_Prepend() now takes tstate
* Replace _PyObject_FastCall() calls
  with _PyObject_VectorcallTstate() calls

1 files changed, 6 insertions, 5 deletions

diff --git a/Python/ceval.c b/Python/ceval.c
index 046cd69151..11d25a53d5 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -10,6 +10,7 @@
 #define PY_LOCAL_AGGRESSIVE
 
 #include "Python.h"
+#include "pycore_call.h"
 #include "pycore_ceval.h"
 #include "pycore_code.h"
 #include "pycore_object.h"
@@ -4306,7 +4307,6 @@ fail: /* Jump here from prelude on failure */
        current Python frame (f), the associated C stack is still in use,
        so recursion_depth must be boosted for the duration.
     */
-    assert(tstate != NULL);
     if (Py_REFCNT(f) > 1) {
         Py_DECREF(f);
         _PyObject_GC_TRACK(f);
@@ -5024,10 +5024,11 @@ do_call_core(PyThreadState *tstate, PyObject *func, PyObject *callargs, PyObject
                 return NULL;
             }
 
-            C_TRACE(result, _PyObject_FastCallDict(func,
-                                                   &_PyTuple_ITEMS(callargs)[1],
-                                                   nargs - 1,
-                                                   kwdict));
+            C_TRACE(result, _PyObject_FastCallDictTstate(
+                                    tstate, func,
+                                    &_PyTuple_ITEMS(callargs)[1],
+                                    nargs - 1,
+                                    kwdict));
             Py_DECREF(func);
             return result;
         }