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

src/objects-inl.h

 // 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 3786 matching lines @@
   WRITE_FIELD(this, OffsetOfCodeWithId(id), value);
   ASSERT(!HEAP->InNewSpace(value));
 }
 
 
 ACCESSORS(JSProxy, handler, Object, kHandlerOffset)
 ACCESSORS(JSProxy, padding, Object, kPaddingOffset)
 
 
 ACCESSORS(JSWeakMap, table, ObjectHashTable, kTableOffset)
+ACCESSORS_GCSAFE(JSWeakMap, next, Object, kNextOffset)
+
+
+ObjectHashTable* JSWeakMap::unchecked_table() {
+  return reinterpret_cast<ObjectHashTable*>(READ_FIELD(this, kTableOffset));
+}
 
 
 Address Foreign::address() {
   return AddressFrom<Address>(READ_INTPTR_FIELD(this, kAddressOffset));
 }
 
 
 void Foreign::set_address(Address value) {
   WRITE_INTPTR_FIELD(this, kAddressOffset, OffsetFrom(value));
 }
@@ skipping 585 matching lines @@
   ASSERT(!maybe_hash->IsFailure());
   return Smi::cast(maybe_hash->ToObjectUnchecked())->value();
 }
 
 
 MaybeObject* ObjectHashTableShape::AsObject(JSObject* key) {
   return key;
 }
 
 
+void ObjectHashTable::RemoveEntry(int entry) {
+  RemoveEntry(entry, GetHeap());
+}
+
+
 void Map::ClearCodeCache(Heap* heap) {
   // No write barrier is needed since empty_fixed_array is not in new space.
   // Please note this function is used during marking:
   //  - MarkCompactCollector::MarkUnmarkedObject
   ASSERT(!heap->InNewSpace(heap->raw_unchecked_empty_fixed_array()));
   WRITE_FIELD(this, kCodeCacheOffset, heap->raw_unchecked_empty_fixed_array());
 }
 
 
 void JSArray::EnsureSize(int required_size) {
@@ skipping 131 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_