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Add regression test for r10451.

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R=vegorov@chromium.org
TEST=cctest/test-heap/PrototypeTransitionClearing

Review URL: https://chromiumcodereview.appspot.com/9138016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10455 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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mstarzinger@chromium.org 2012-01-20 12:44:04 +00:00
parent af98ee9492
commit 5c92e4f1c3
1 changed files with 19 additions and 0 deletions
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19
test/cctest/test-heap.cc
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@ -1606,4 +1606,23 @@ TEST(PrototypeTransitionClearing) {
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());
}