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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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| 535 UPDATE_POINTERS, | 535 UPDATE_POINTERS, |
| 536 RELOCATE_OBJECTS | 536 RELOCATE_OBJECTS |
| 537 }; | 537 }; |
| 538 | 538 |
| 539 // The current stage of the collector. | 539 // The current stage of the collector. |
| 540 CollectorState state_; | 540 CollectorState state_; |
| 541 #endif | 541 #endif |
| 542 | 542 |
| 543 MarkingParity marking_parity_; | 543 MarkingParity marking_parity_; |
| 544 | 544 |
| 545 // True if we are collecting slots to perform evacuation from evacuation | |
| 546 // candidates. | |
| 547 bool compacting_; | |
| 548 | |
| 549 bool was_marked_incrementally_; | 545 bool was_marked_incrementally_; |
| 550 | 546 |
| 551 // True if concurrent or parallel sweeping is currently in progress. | |
| 552 bool sweeping_in_progress_; | |
| 553 | |
| 554 // True if parallel compaction is currently in progress. | |
| 555 bool parallel_compaction_in_progress_; | |
| 556 | |
| 557 // Synchronize sweeper threads. | |
| 558 base::Semaphore pending_sweeper_jobs_semaphore_; | |
| 559 | |
| 560 // Synchronize compaction tasks. | |
| 561 base::Semaphore pending_compaction_tasks_semaphore_; | |
| 562 | |
| 563 // Number of active compaction tasks (including main thread). | |
| 564 intptr_t concurrent_compaction_tasks_active_; | |
| 565 | |
| 566 bool evacuation_; | 547 bool evacuation_; |
| 567 | 548 |
| 568 SlotsBufferAllocator* slots_buffer_allocator_; | 549 SlotsBufferAllocator* slots_buffer_allocator_; |
| 569 | 550 |
| 570 SlotsBuffer* migration_slots_buffer_; | 551 SlotsBuffer* migration_slots_buffer_; |
| 571 | 552 |
| 572 // Finishes GC, performs heap verification if enabled. | 553 // Finishes GC, performs heap verification if enabled. |
| 573 void Finish(); | 554 void Finish(); |
| 574 | 555 |
| 575 // ----------------------------------------------------------------------- | 556 // ----------------------------------------------------------------------- |
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| 786 // AddEvacuationSlotsbufferSynchronized to adds its slots buffer to the | 767 // AddEvacuationSlotsbufferSynchronized to adds its slots buffer to the |
| 787 // evacuation_slots_buffers_ list using the evacuation_slots_buffers_mutex_ | 768 // evacuation_slots_buffers_ list using the evacuation_slots_buffers_mutex_ |
| 788 // lock. | 769 // lock. |
| 789 base::Mutex evacuation_slots_buffers_mutex_; | 770 base::Mutex evacuation_slots_buffers_mutex_; |
| 790 List<SlotsBuffer*> evacuation_slots_buffers_; | 771 List<SlotsBuffer*> evacuation_slots_buffers_; |
| 791 | 772 |
| 792 base::SmartPointer<FreeList> free_list_old_space_; | 773 base::SmartPointer<FreeList> free_list_old_space_; |
| 793 base::SmartPointer<FreeList> free_list_code_space_; | 774 base::SmartPointer<FreeList> free_list_code_space_; |
| 794 base::SmartPointer<FreeList> free_list_map_space_; | 775 base::SmartPointer<FreeList> free_list_map_space_; |
| 795 | 776 |
| 777 // True if we are collecting slots to perform evacuation from evacuation |
| 778 // candidates. |
| 779 bool compacting_; |
| 780 |
| 781 // True if concurrent or parallel sweeping is currently in progress. |
| 782 bool sweeping_in_progress_; |
| 783 |
| 784 // True if parallel compaction is currently in progress. |
| 785 bool compaction_in_progress_; |
| 786 |
| 787 // Semaphore used to synchronize sweeper tasks. |
| 788 base::Semaphore pending_sweeper_tasks_semaphore_; |
| 789 |
| 790 // Semaphore used to synchronize compaction tasks. |
| 791 base::Semaphore pending_compaction_tasks_semaphore_; |
| 792 |
| 793 // Number of active compaction tasks (including main thread). |
| 794 intptr_t concurrent_compaction_tasks_active_; |
| 795 |
| 796 friend class Heap; | 796 friend class Heap; |
| 797 }; | 797 }; |
| 798 | 798 |
| 799 | 799 |
| 800 class MarkBitCellIterator BASE_EMBEDDED { | 800 class MarkBitCellIterator BASE_EMBEDDED { |
| 801 public: | 801 public: |
| 802 explicit MarkBitCellIterator(MemoryChunk* chunk) : chunk_(chunk) { | 802 explicit MarkBitCellIterator(MemoryChunk* chunk) : chunk_(chunk) { |
| 803 last_cell_index_ = Bitmap::IndexToCell(Bitmap::CellAlignIndex( | 803 last_cell_index_ = Bitmap::IndexToCell(Bitmap::CellAlignIndex( |
| 804 chunk_->AddressToMarkbitIndex(chunk_->area_end()))); | 804 chunk_->AddressToMarkbitIndex(chunk_->area_end()))); |
| 805 cell_base_ = chunk_->area_start(); | 805 cell_base_ = chunk_->area_start(); |
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| 850 private: | 850 private: |
| 851 MarkCompactCollector* collector_; | 851 MarkCompactCollector* collector_; |
| 852 }; | 852 }; |
| 853 | 853 |
| 854 | 854 |
| 855 const char* AllocationSpaceName(AllocationSpace space); | 855 const char* AllocationSpaceName(AllocationSpace space); |
| 856 } | 856 } |
| 857 } // namespace v8::internal | 857 } // namespace v8::internal |
| 858 | 858 |
| 859 #endif // V8_HEAP_MARK_COMPACT_H_ | 859 #endif // V8_HEAP_MARK_COMPACT_H_ |
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