Prototype of mark-and-compact support for Harmony weak maps.

src/objects.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 11816 matching lines @@
 }
 
 
 void ObjectHashTable::AddEntry(int entry, JSObject* key, Object* value) {
   set(EntryToIndex(entry), key);
   set(EntryToIndex(entry) + 1, value);
   ElementAdded();
 }
 
 
-void ObjectHashTable::RemoveEntry(int entry) {
-  Object* null_value = GetHeap()->null_value();
-  set(EntryToIndex(entry), null_value);
-  set(EntryToIndex(entry) + 1, null_value);
+void ObjectHashTable::RemoveEntry(int entry, Heap* heap) {
+  set_null(heap, EntryToIndex(entry));
+  set_null(heap, EntryToIndex(entry) + 1);
   ElementRemoved();
 }
 
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
 // Check if there is a break point at this code position.
 bool DebugInfo::HasBreakPoint(int code_position) {
   // Get the break point info object for this code position.
   Object* break_point_info = GetBreakPointInfo(code_position);
 
@@ skipping 238 matching lines @@
   if (break_point_objects()->IsUndefined()) return 0;
   // Single beak point.
   if (!break_point_objects()->IsFixedArray()) return 1;
   // Multiple break points.
   return FixedArray::cast(break_point_objects())->length();
 }
 #endif
 
 
 } }  // namespace v8::internal