1// Copyright 2012 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28#ifndef V8_MARK_COMPACT_INL_H_ 29#define V8_MARK_COMPACT_INL_H_ 30 31#include "isolate.h" 32#include "memory.h" 33#include "mark-compact.h" 34 35 36namespace v8 { 37namespace internal { 38 39 40MarkBit Marking::MarkBitFrom(Address addr) { 41 MemoryChunk* p = MemoryChunk::FromAddress(addr); 42 return p->markbits()->MarkBitFromIndex(p->AddressToMarkbitIndex(addr), 43 p->ContainsOnlyData()); 44} 45 46 47void MarkCompactCollector::SetFlags(int flags) { 48 sweep_precisely_ = ((flags & Heap::kSweepPreciselyMask) != 0); 49 reduce_memory_footprint_ = ((flags & Heap::kReduceMemoryFootprintMask) != 0); 50 abort_incremental_marking_ = 51 ((flags & Heap::kAbortIncrementalMarkingMask) != 0); 52} 53 54 55void MarkCompactCollector::MarkObject(HeapObject* obj, MarkBit mark_bit) { 56 ASSERT(Marking::MarkBitFrom(obj) == mark_bit); 57 if (!mark_bit.Get()) { 58 mark_bit.Set(); 59 MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size()); 60 ASSERT(IsMarked(obj)); 61 ASSERT(obj->GetIsolate()->heap()->Contains(obj)); 62 marking_deque_.PushBlack(obj); 63 } 64} 65 66 67void MarkCompactCollector::SetMark(HeapObject* obj, MarkBit mark_bit) { 68 ASSERT(!mark_bit.Get()); 69 ASSERT(Marking::MarkBitFrom(obj) == mark_bit); 70 mark_bit.Set(); 71 MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size()); 72} 73 74 75bool MarkCompactCollector::IsMarked(Object* obj) { 76 ASSERT(obj->IsHeapObject()); 77 HeapObject* heap_object = HeapObject::cast(obj); 78 return Marking::MarkBitFrom(heap_object).Get(); 79} 80 81 82void MarkCompactCollector::RecordSlot(Object** anchor_slot, 83 Object** slot, 84 Object* object) { 85 Page* object_page = Page::FromAddress(reinterpret_cast<Address>(object)); 86 if (object_page->IsEvacuationCandidate() && 87 !ShouldSkipEvacuationSlotRecording(anchor_slot)) { 88 if (!SlotsBuffer::AddTo(&slots_buffer_allocator_, 89 object_page->slots_buffer_address(), 90 slot, 91 SlotsBuffer::FAIL_ON_OVERFLOW)) { 92 EvictEvacuationCandidate(object_page); 93 } 94 } 95} 96 97 98} } // namespace v8::internal 99 100#endif // V8_MARK_COMPACT_INL_H_ 101