Add DependentCode to PropertyCells

src/objects-visiting-inl.h

Index: src/objects-visiting-inl.h
diff --git a/src/objects-visiting-inl.h b/src/objects-visiting-inl.h
index 46ca0b10ca6219d9b49e8fe08d20241cad400087..0d15cae485149690650b617c1d4fc64006777655 100644
--- a/src/objects-visiting-inl.h
+++ b/src/objects-visiting-inl.h
@@ -221,10 +221,7 @@ void StaticMarkingVisitor<StaticVisitor>::Initialize() {
                   Cell::BodyDescriptor,
                   void>::Visit);
 
-  table_.Register(kVisitPropertyCell,
-                  &FixedBodyVisitor<StaticVisitor,
-                  PropertyCell::BodyDescriptor,
-                  void>::Visit);
+  table_.Register(kVisitPropertyCell, &VisitPropertyCell);
 
   table_.template RegisterSpecializations<DataObjectVisitor,
                                           kVisitDataObject,
@@ -359,6 +356,27 @@ void StaticMarkingVisitor<StaticVisitor>::VisitMap(
 
 
 template<typename StaticVisitor>
+void StaticMarkingVisitor<StaticVisitor>::VisitPropertyCell(
+    Map* map, HeapObject* object) {
+  Heap* heap = map->GetHeap();
+
+  // Mark property cell dependent codes array but do not push it onto marking
+  // stack, this will make references from it weak. We will clean dead
+  // codes when we iterate over property cells in
+  // ClearNonLivePropertyCellCodeDependencies.

[Michael Starzinger, 2013/06/26 15:23:31]

nit: Comment is outdated, the function is called ClearNonLiveReferences().

[Michael Starzinger, 2013/06/26 15:32:04]

Also the cleanup pass is only done with FLAG_collect_maps, so this block needs
to be guarded by this flag was well.

[danno, 2013/06/26 15:42:40]

Done.

[danno, 2013/06/26 15:42:40]

Done.

+  Object** slot =
+      HeapObject::RawField(object, PropertyCell::kDependentCodeOffset);
+  HeapObject* obj = HeapObject::cast(*slot);
+  heap->mark_compact_collector()->RecordSlot(slot, slot, obj);
+  StaticVisitor::MarkObjectWithoutPush(heap, obj);
+
+  StaticVisitor::VisitPointers(heap,
+      HeapObject::RawField(object, PropertyCell::kPointerFieldsBeginOffset),
+      HeapObject::RawField(object, PropertyCell::kPointerFieldsEndOffset));
+}
+
+
+template<typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitCode(
     Map* map, HeapObject* object) {
   Heap* heap = map->GetHeap();