Simple non-incremental compaction by evacuation.

src/mark-compact-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 26 matching lines @@
 
 
 MarkBit Marking::MarkBitFrom(Address addr) {
   MemoryChunk *p = MemoryChunk::FromAddress(addr);
   return p->markbits()->MarkBitFromIndex(p->AddressToMarkbitIndex(addr),
                                          p->ContainsOnlyData());
 }
 
 
 void MarkCompactCollector::SetFlags(int flags) {
-  force_compaction_ = ((flags & Heap::kForceCompactionMask) != 0);
   sweep_precisely_ = ((flags & Heap::kMakeHeapIterableMask) != 0);
 }
 
 
 void MarkCompactCollector::MarkObject(HeapObject* obj, MarkBit mark_bit) {
   ASSERT(Marking::MarkBitFrom(obj) == mark_bit);
   if (!mark_bit.Get()) {
     mark_bit.Set();
-    tracer_->increment_marked_count();
 #ifdef DEBUG
     UpdateLiveObjectCount(obj);
 #endif
     ProcessNewlyMarkedObject(obj);
   }
 }
 

[Erik Corry, 2011/06/20 20:41:26]

missing blank line

[Vyacheslav Egorov (Chromium), 2011/06/21 11:44:48]

Done.

 void MarkCompactCollector::SetMark(HeapObject* obj, MarkBit mark_bit) {
   ASSERT(Marking::MarkBitFrom(obj) == mark_bit);
   mark_bit.Set();
-  tracer_->increment_marked_count();
 #ifdef DEBUG
   UpdateLiveObjectCount(obj);
 #endif
 }
 
 
 bool MarkCompactCollector::IsMarked(Object* obj) {
   ASSERT(obj->IsHeapObject());
   HeapObject* heap_object = HeapObject::cast(obj);
   return Marking::MarkBitFrom(heap_object).Get();
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_INL_H_