Refactored some of the Py_TRACE_REFS code. New private API function
_Py_AddToAllObjects() that simply inserts an object at the front of
the doubly-linked list of all objects. Changed PyType_Ready() (the
closest thing we've got to a choke point for type objects) to call
that.
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index b029777..c2ed180 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -3052,6 +3052,18 @@
type->tp_flags |= Py_TPFLAGS_READYING;
+#ifdef Py_TRACE_REFS
+ /* PyType_Ready is the closest thing we have to a choke point
+ * for type objects, so is the best place I can think of to try
+ * to get type objects into the doubly-linked list of all objects.
+ * Still, not all type objects go thru PyType_Ready.
+ */
+ if (type->_ob_next == NULL) {
+ assert(type->_ob_prev == NULL);
+ _Py_AddToAllObjects((PyObject *)type);
+ }
+#endif
+
/* Initialize tp_base (defaults to BaseObject unless that's us) */
base = type->tp_base;
if (base == NULL && type != &PyBaseObject_Type)