Use page header information to test for InNewSpace.

src/spaces.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 380 matching lines @@
 }
 
 
 NewSpacePage* NewSpacePage::Initialize(Heap* heap, Address start) {
   MemoryChunk* chunk = MemoryChunk::Initialize(heap,
                                                start,
                                                Page::kPageSize,
                                                NOT_EXECUTABLE,
                                                heap->new_space());
   chunk->initialize_scan_on_scavenge(true);
+  chunk->SetFlag(MemoryChunk::IN_NEW_SPACE);
   heap->incremental_marking()->SetNewSpacePageFlags(chunk);
   return static_cast<NewSpacePage*>(chunk);
 }
 
 
 MemoryChunk* MemoryChunk::Initialize(Heap* heap,
                                      Address base,
                                      size_t size,
                                      Executability executable,
                                      Space* owner) {
@@ skipping 1755 matching lines @@
       page_count_--;
 
       heap()->isolate()->memory_allocator()->Free(page);
     }
   }
 }
 
 
 bool LargeObjectSpace::Contains(HeapObject* object) {
   Address address = object->address();
-  if (heap()->new_space()->Contains(address)) {
-    return false;
-  }
   MemoryChunk* chunk = MemoryChunk::FromAddress(address);
 
-  bool owned = chunk->owner() == this;
+  bool owned = (chunk->owner() == this);
 
   SLOW_ASSERT(!owned
               || !FindObject(address)->IsFailure());
 
   return owned;
 }
 
 
 #ifdef DEBUG
 // We do not assume that the large object iterator works, because it depends
@@ skipping 75 matching lines @@
   for (HeapObject* obj = obj_it.next(); obj != NULL; obj = obj_it.next()) {
     if (obj->IsCode()) {
       Code* code = Code::cast(obj);
       isolate->code_kind_statistics()[code->kind()] += code->Size();
     }
   }
 }
 #endif  // DEBUG
 
 } }  // namespace v8::internal