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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 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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76 } | 76 } |
77 } | 77 } |
78 } | 78 } |
79 | 79 |
80 | 80 |
81 void IncrementalMarking::RecordWriteFromCode(HeapObject* obj, | 81 void IncrementalMarking::RecordWriteFromCode(HeapObject* obj, |
82 Object** slot, | 82 Object** slot, |
83 Isolate* isolate) { | 83 Isolate* isolate) { |
84 ASSERT(obj->IsHeapObject()); | 84 ASSERT(obj->IsHeapObject()); |
85 IncrementalMarking* marking = isolate->heap()->incremental_marking(); | 85 IncrementalMarking* marking = isolate->heap()->incremental_marking(); |
86 ASSERT(!marking->is_compacting_); | |
87 | 86 |
88 MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address()); | 87 MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address()); |
89 int counter = chunk->write_barrier_counter(); | 88 int counter = chunk->write_barrier_counter(); |
90 if (counter < (MemoryChunk::kWriteBarrierCounterGranularity / 2)) { | |
91 marking->write_barriers_invoked_since_last_step_ += | |
92 MemoryChunk::kWriteBarrierCounterGranularity - | |
93 chunk->write_barrier_counter(); | |
94 chunk->set_write_barrier_counter( | |
95 MemoryChunk::kWriteBarrierCounterGranularity); | |
96 } | |
97 | |
98 marking->RecordWrite(obj, slot, *slot); | |
99 } | |
100 | |
101 | |
102 void IncrementalMarking::RecordWriteForEvacuationFromCode(HeapObject* obj, | |
103 Object** slot, | |
104 Isolate* isolate) { | |
105 ASSERT(obj->IsHeapObject()); | |
106 IncrementalMarking* marking = isolate->heap()->incremental_marking(); | |
107 ASSERT(marking->is_compacting_); | |
108 | |
109 MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address()); | |
110 int counter = chunk->write_barrier_counter(); | |
111 if (counter < (MemoryChunk::kWriteBarrierCounterGranularity / 2)) { | 89 if (counter < (MemoryChunk::kWriteBarrierCounterGranularity / 2)) { |
112 marking->write_barriers_invoked_since_last_step_ += | 90 marking->write_barriers_invoked_since_last_step_ += |
113 MemoryChunk::kWriteBarrierCounterGranularity - | 91 MemoryChunk::kWriteBarrierCounterGranularity - |
114 chunk->write_barrier_counter(); | 92 chunk->write_barrier_counter(); |
115 chunk->set_write_barrier_counter( | 93 chunk->set_write_barrier_counter( |
116 MemoryChunk::kWriteBarrierCounterGranularity); | 94 MemoryChunk::kWriteBarrierCounterGranularity); |
117 } | 95 } |
118 | 96 |
119 marking->RecordWrite(obj, slot, *slot); | 97 marking->RecordWrite(obj, slot, *slot); |
120 } | 98 } |
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1033 bytes_scanned_ = 0; | 1011 bytes_scanned_ = 0; |
1034 write_barriers_invoked_since_last_step_ = 0; | 1012 write_barriers_invoked_since_last_step_ = 0; |
1035 } | 1013 } |
1036 | 1014 |
1037 | 1015 |
1038 int64_t IncrementalMarking::SpaceLeftInOldSpace() { | 1016 int64_t IncrementalMarking::SpaceLeftInOldSpace() { |
1039 return heap_->MaxOldGenerationSize() - heap_->PromotedSpaceSizeOfObjects(); | 1017 return heap_->MaxOldGenerationSize() - heap_->PromotedSpaceSizeOfObjects(); |
1040 } | 1018 } |
1041 | 1019 |
1042 } } // namespace v8::internal | 1020 } } // namespace v8::internal |
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