Stackless issue python#84: fix tasklet_kill(...) and typeobject.c wrap_next(...)

Add the required STACKLESS_... macros to taskletobject.c tasklet_kill(...)
and wrap_next(). Add a test class.

https://bitbucket.org/stackless-dev/stackless/issue/84
(grafted from 5d3898850c2f06d2a57b7589e4b5b8ebd9355e84, af52a8f20449 and
27e7e0fa1709)

Author: Anselm Kruis

Objects/typeobject.c

@@ -4812,12 +4812,15 @@ RICHCMP_WRAPPER(ge, Py_GE)
 static PyObject *
 wrap_next(PyObject *self, PyObject *args, void *wrapped)
 {
+    STACKLESS_GETARG();
     unaryfunc func = (unaryfunc)wrapped;
     PyObject *res;
 
     if (!check_num_args(args, 0))
         return NULL;
+    STACKLESS_PROMOTE_ALL();
     res = (*func)(self);
+    STACKLESS_ASSERT();
     if (res == NULL && !PyErr_Occurred())
         PyErr_SetNone(PyExc_StopIteration);
     return res;

Stackless/module/taskletobject.c

@@ -1258,15 +1258,20 @@ int PyTasklet_Kill(PyTaskletObject *task)
 static PyObject *
 tasklet_kill(PyObject *self, PyObject *args, PyObject *kwds)
 {
+    STACKLESS_GETARG();
     int pending;
+    PyObject *result;
     PyObject *pendingO = Py_False;
     char *kwlist[] = {"pending", 0};
     if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:kill", kwlist, &pendingO))
         return NULL;
     pending = PyObject_IsTrue(pendingO);
     if (pending == -1)
         return NULL;
-    return impl_tasklet_kill((PyTaskletObject*)self, pending);
+    STACKLESS_PROMOTE_ALL();
+    result = impl_tasklet_kill((PyTaskletObject*)self, pending);
+    STACKLESS_ASSERT();
+    return result;
 }
 
 

Stackless/unittests/test_defects.py

@@ -275,6 +275,23 @@ def func():
         self.assertEqual(rc, 42)
 
 
+class TestStacklessProtokoll(StacklessTestCase):
+    """Various tests for violations of the STACKLESS_GETARG() STACKLESS_ASSERT() protocol
+
+    See https://bitbucket.org/stackless-dev/stackless/issues/84
+    """
+    def test_invalid_args_channel_next(self):
+        """test of typeobject.c wrap_next(...)"""
+        func = stackless.channel().__next__
+        # func(None) causes the crash
+        self.assertRaises(TypeError, func, None)
+
+    def test_invalid_args_tasklet_kill(self):
+        func = stackless.tasklet().kill
+        # func(False, None) causes the crash
+        self.assertRaises(TypeError, func, False, None)
+
+
 if __name__ == '__main__':
     if not sys.argv[1:]:
         sys.argv.append('-v')