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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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773 // - Objects reachable due to host application logic like object groups | 773 // - Objects reachable due to host application logic like object groups |
774 // or implicit references' groups. | 774 // or implicit references' groups. |
775 void ProcessEphemeralMarking(ObjectVisitor* visitor, | 775 void ProcessEphemeralMarking(ObjectVisitor* visitor, |
776 bool only_process_harmony_weak_collections); | 776 bool only_process_harmony_weak_collections); |
777 | 777 |
778 // If the call-site of the top optimized code was not prepared for | 778 // If the call-site of the top optimized code was not prepared for |
779 // deoptimization, then treat the maps in the code as strong pointers, | 779 // deoptimization, then treat the maps in the code as strong pointers, |
780 // otherwise a map can die and deoptimize the code. | 780 // otherwise a map can die and deoptimize the code. |
781 void ProcessTopOptimizedFrame(ObjectVisitor* visitor); | 781 void ProcessTopOptimizedFrame(ObjectVisitor* visitor); |
782 | 782 |
783 // Retain dying maps for <FLAG_retain_maps_for_n_gc> garbage collections to | |
784 // increase chances of reusing of map transition tree in future. | |
785 void RetainMaps(ObjectVisitor* visitor); | |
786 | |
787 // Mark objects reachable (transitively) from objects in the marking | 783 // Mark objects reachable (transitively) from objects in the marking |
788 // stack. This function empties the marking stack, but may leave | 784 // stack. This function empties the marking stack, but may leave |
789 // overflowed objects in the heap, in which case the marking stack's | 785 // overflowed objects in the heap, in which case the marking stack's |
790 // overflow flag will be set. | 786 // overflow flag will be set. |
791 void EmptyMarkingDeque(); | 787 void EmptyMarkingDeque(); |
792 | 788 |
793 // Refill the marking stack with overflowed objects from the heap. This | 789 // Refill the marking stack with overflowed objects from the heap. This |
794 // function either leaves the marking stack full or clears the overflow | 790 // function either leaves the marking stack full or clears the overflow |
795 // flag on the marking stack. | 791 // flag on the marking stack. |
796 void RefillMarkingDeque(); | 792 void RefillMarkingDeque(); |
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957 private: | 953 private: |
958 MarkCompactCollector* collector_; | 954 MarkCompactCollector* collector_; |
959 }; | 955 }; |
960 | 956 |
961 | 957 |
962 const char* AllocationSpaceName(AllocationSpace space); | 958 const char* AllocationSpaceName(AllocationSpace space); |
963 } | 959 } |
964 } // namespace v8::internal | 960 } // namespace v8::internal |
965 | 961 |
966 #endif // V8_HEAP_MARK_COMPACT_H_ | 962 #endif // V8_HEAP_MARK_COMPACT_H_ |
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