text: // Copyright 2012 the V8 project authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef V8_HEAP_MARK_COMPACT_INL_H_
  #define V8_HEAP_MARK_COMPACT_INL_H_
  
  #include "src/heap/mark-compact.h"
  #include "src/isolate.h"
  
  
  namespace v8 {
  namespace internal {
  
  
  MarkBit Marking::MarkBitFrom(Address addr) {
    MemoryChunk* p = MemoryChunk::FromAddress(addr);
    return p->markbits()->MarkBitFromIndex(p->AddressToMarkbitIndex(addr),
                                           p->ContainsOnlyData());
  }
  
  
  void MarkCompactCollector::SetFlags(int flags) {
    reduce_memory_footprint_ = ((flags & Heap::kReduceMemoryFootprintMask) != 0);
    abort_incremental_marking_ =
        ((flags & Heap::kAbortIncrementalMarkingMask) != 0);
  }
  
  
  void MarkCompactCollector::MarkObject(HeapObject* obj, MarkBit mark_bit) {
    DCHECK(Marking::MarkBitFrom(obj) == mark_bit);
    if (!mark_bit.Get()) {
      mark_bit.Set();
      MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size());
      DCHECK(IsMarked(obj));
      DCHECK(obj->GetIsolate()->heap()->Contains(obj));
      marking_deque_.PushBlack(obj);
    }
  }
  
  
  void MarkCompactCollector::SetMark(HeapObject* obj, MarkBit mark_bit) {
    DCHECK(!mark_bit.Get());
    DCHECK(Marking::MarkBitFrom(obj) == mark_bit);
    mark_bit.Set();
    MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size());
  }
  
  
  bool MarkCompactCollector::IsMarked(Object* obj) {
    DCHECK(obj->IsHeapObject());
    HeapObject* heap_object = HeapObject::cast(obj);
    return Marking::MarkBitFrom(heap_object).Get();
  }
  
  
  void MarkCompactCollector::RecordSlot(Object** anchor_slot, Object** slot,
                                        Object* object,
                                        SlotsBuffer::AdditionMode mode) {
    Page* object_page = Page::FromAddress(reinterpret_cast<Address>(object));
    if (object_page->IsEvacuationCandidate() &&
        !ShouldSkipEvacuationSlotRecording(anchor_slot)) {
      if (!SlotsBuffer::AddTo(&slots_buffer_allocator_,
                              object_page->slots_buffer_address(), slot, mode)) {
        EvictEvacuationCandidate(object_page);
      }
    }
  }
  }
  }  // namespace v8::internal
  
  #endif  // V8_HEAP_MARK_COMPACT_INL_H_
  