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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_HEAP_MARK_COMPACT_H_ | 5 #ifndef V8_HEAP_MARK_COMPACT_H_ |
6 #define V8_HEAP_MARK_COMPACT_H_ | 6 #define V8_HEAP_MARK_COMPACT_H_ |
7 | 7 |
8 #include "src/base/bits.h" | 8 #include "src/base/bits.h" |
9 #include "src/heap/spaces.h" | 9 #include "src/heap/spaces.h" |
10 | 10 |
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411 static bool AddTo(SlotsBufferAllocator* allocator, | 411 static bool AddTo(SlotsBufferAllocator* allocator, |
412 SlotsBuffer** buffer_address, SlotType type, Address addr, | 412 SlotsBuffer** buffer_address, SlotType type, Address addr, |
413 AdditionMode mode); | 413 AdditionMode mode); |
414 | 414 |
415 // Eliminates all stale entries from the slots buffer, i.e., slots that | 415 // Eliminates all stale entries from the slots buffer, i.e., slots that |
416 // are not part of live objects anymore. This method must be called after | 416 // are not part of live objects anymore. This method must be called after |
417 // marking, when the whole transitive closure is known and must be called | 417 // marking, when the whole transitive closure is known and must be called |
418 // before sweeping when mark bits are still intact. | 418 // before sweeping when mark bits are still intact. |
419 static void RemoveInvalidSlots(Heap* heap, SlotsBuffer* buffer); | 419 static void RemoveInvalidSlots(Heap* heap, SlotsBuffer* buffer); |
420 | 420 |
421 // Eliminate all slots that point to the given invalid_object. | 421 // Eliminate all slots that point to the given invalid_object. |
Michael Starzinger
2015/07/03 11:24:55
nit: Comment no longer applies.
Hannes Payer (out of office)
2015/07/03 11:26:53
Done.
| |
422 static void RemoveObjectSlots(Heap* heap, SlotsBuffer* buffer, | 422 static void RemoveObjectSlots(Heap* heap, SlotsBuffer* buffer, |
423 HeapObject* invalid_object); | 423 Address start_slot, Address end_slot); |
424 | 424 |
425 // Ensures that there are no invalid slots in the chain of slots buffers. | 425 // Ensures that there are no invalid slots in the chain of slots buffers. |
426 static void VerifySlots(Heap* heap, SlotsBuffer* buffer); | 426 static void VerifySlots(Heap* heap, SlotsBuffer* buffer); |
427 | 427 |
428 static const int kNumberOfElements = 1021; | 428 static const int kNumberOfElements = 1021; |
429 | 429 |
430 private: | 430 private: |
431 static const int kChainLengthThreshold = 15; | 431 static const int kChainLengthThreshold = 15; |
432 | 432 |
433 intptr_t idx_; | 433 intptr_t idx_; |
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735 | 735 |
736 // The following four methods can just be called after marking, when the | 736 // The following four methods can just be called after marking, when the |
737 // whole transitive closure is known. They must be called before sweeping | 737 // whole transitive closure is known. They must be called before sweeping |
738 // when mark bits are still intact. | 738 // when mark bits are still intact. |
739 bool IsSlotInBlackObject(Page* p, Address slot, HeapObject** out_object); | 739 bool IsSlotInBlackObject(Page* p, Address slot, HeapObject** out_object); |
740 bool IsSlotInBlackObjectSlow(Page* p, Address slot); | 740 bool IsSlotInBlackObjectSlow(Page* p, Address slot); |
741 bool IsSlotInLiveObject(Address slot); | 741 bool IsSlotInLiveObject(Address slot); |
742 void VerifyIsSlotInLiveObject(Address slot, HeapObject* object); | 742 void VerifyIsSlotInLiveObject(Address slot, HeapObject* object); |
743 | 743 |
744 // Removes all the slots in the slot buffers that are within the given | 744 // Removes all the slots in the slot buffers that are within the given |
745 // invalid_object. | 745 // address range. |
746 void RemoveObjectSlots(HeapObject* invalid_object); | 746 void RemoveObjectSlots(Address start_slot, Address end_slot); |
747 | 747 |
748 private: | 748 private: |
749 class SweeperTask; | 749 class SweeperTask; |
750 | 750 |
751 explicit MarkCompactCollector(Heap* heap); | 751 explicit MarkCompactCollector(Heap* heap); |
752 ~MarkCompactCollector(); | 752 ~MarkCompactCollector(); |
753 | 753 |
754 bool WillBeDeoptimized(Code* code); | 754 bool WillBeDeoptimized(Code* code); |
755 void EvictPopularEvacuationCandidate(Page* page); | 755 void EvictPopularEvacuationCandidate(Page* page); |
756 void ClearInvalidSlotsBufferEntries(PagedSpace* space); | 756 void ClearInvalidSlotsBufferEntries(PagedSpace* space); |
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1029 private: | 1029 private: |
1030 MarkCompactCollector* collector_; | 1030 MarkCompactCollector* collector_; |
1031 }; | 1031 }; |
1032 | 1032 |
1033 | 1033 |
1034 const char* AllocationSpaceName(AllocationSpace space); | 1034 const char* AllocationSpaceName(AllocationSpace space); |
1035 } | 1035 } |
1036 } // namespace v8::internal | 1036 } // namespace v8::internal |
1037 | 1037 |
1038 #endif // V8_HEAP_MARK_COMPACT_H_ | 1038 #endif // V8_HEAP_MARK_COMPACT_H_ |
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