CHECK(trans->get(j + Map::kProtoTransitionMapOffset)->IsMap());
CHECK(trans->get(j + Map::kProtoTransitionPrototypeOffset)->IsJSObject());
}
+
+ // Make sure next prototype is placed on an old-space evacuation candidate.
+ Handle<JSObject> prototype;
+ PagedSpace* space = HEAP->old_pointer_space();
+ do {
+ prototype = FACTORY->NewJSArray(32 * KB, TENURED);
+ } while (space->FirstPage() == space->LastPage() ||
+ !space->LastPage()->Contains(prototype->address()));
+
+ // Add a prototype on an evacuation candidate and verify that transition
+ // clearing correctly records slots in prototype transition array.
+ i::FLAG_always_compact = true;
+ Handle<Map> map(baseObject->map());
+ CHECK(!space->LastPage()->Contains(map->prototype_transitions()->address()));
+ CHECK(space->LastPage()->Contains(prototype->address()));
+ baseObject->SetPrototype(*prototype, false)->ToObjectChecked();
+ CHECK(map->GetPrototypeTransition(*prototype)->IsMap());
+ HEAP->CollectAllGarbage(Heap::kNoGCFlags);
+ CHECK(map->GetPrototypeTransition(*prototype)->IsMap());
}