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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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779 // stack. This function empties the marking stack, but may leave | 779 // stack. This function empties the marking stack, but may leave |
780 // overflowed objects in the heap, in which case the marking stack's | 780 // overflowed objects in the heap, in which case the marking stack's |
781 // overflow flag will be set. | 781 // overflow flag will be set. |
782 void EmptyMarkingDeque(); | 782 void EmptyMarkingDeque(); |
783 | 783 |
784 // Refill the marking stack with overflowed objects from the heap. This | 784 // Refill the marking stack with overflowed objects from the heap. This |
785 // function either leaves the marking stack full or clears the overflow | 785 // function either leaves the marking stack full or clears the overflow |
786 // flag on the marking stack. | 786 // flag on the marking stack. |
787 void RefillMarkingDeque(); | 787 void RefillMarkingDeque(); |
788 | 788 |
789 // After reachable maps have been marked process per context object | |
790 // literal map caches removing unmarked entries. | |
791 void ProcessMapCaches(); | |
792 | |
793 // Callback function for telling whether the object *p is an unmarked | 789 // Callback function for telling whether the object *p is an unmarked |
794 // heap object. | 790 // heap object. |
795 static bool IsUnmarkedHeapObject(Object** p); | 791 static bool IsUnmarkedHeapObject(Object** p); |
796 static bool IsUnmarkedHeapObjectWithHeap(Heap* heap, Object** p); | 792 static bool IsUnmarkedHeapObjectWithHeap(Heap* heap, Object** p); |
797 | 793 |
798 // Map transitions from a live map to a dead map must be killed. | 794 // Map transitions from a live map to a dead map must be killed. |
799 // We replace them with a null descriptor, with the same key. | 795 // We replace them with a null descriptor, with the same key. |
800 void ClearNonLiveReferences(); | 796 void ClearNonLiveReferences(); |
801 void ClearNonLivePrototypeTransitions(Map* map); | 797 void ClearNonLivePrototypeTransitions(Map* map); |
802 void ClearNonLiveMapTransitions(Map* map, MarkBit map_mark); | 798 void ClearNonLiveMapTransitions(Map* map, MarkBit map_mark); |
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950 private: | 946 private: |
951 MarkCompactCollector* collector_; | 947 MarkCompactCollector* collector_; |
952 }; | 948 }; |
953 | 949 |
954 | 950 |
955 const char* AllocationSpaceName(AllocationSpace space); | 951 const char* AllocationSpaceName(AllocationSpace space); |
956 } | 952 } |
957 } // namespace v8::internal | 953 } // namespace v8::internal |
958 | 954 |
959 #endif // V8_HEAP_MARK_COMPACT_H_ | 955 #endif // V8_HEAP_MARK_COMPACT_H_ |
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