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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef V8_INCREMENTAL_MARKING_INL_H_ | |
| 6 #define V8_INCREMENTAL_MARKING_INL_H_ | |
| 7 | |
| 8 #include "src/incremental-marking.h" | |
| 9 | |
| 10 namespace v8 { | |
| 11 namespace internal { | |
| 12 | |
| 13 | |
| 14 bool IncrementalMarking::BaseRecordWrite(HeapObject* obj, | |
| 15 Object** slot, | |
| 16 Object* value) { | |
| 17 HeapObject* value_heap_obj = HeapObject::cast(value); | |
| 18 MarkBit value_bit = Marking::MarkBitFrom(value_heap_obj); | |
| 19 if (Marking::IsWhite(value_bit)) { | |
| 20 MarkBit obj_bit = Marking::MarkBitFrom(obj); | |
| 21 if (Marking::IsBlack(obj_bit)) { | |
| 22 MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address()); | |
| 23 if (chunk->IsFlagSet(MemoryChunk::HAS_PROGRESS_BAR)) { | |
| 24 if (chunk->IsLeftOfProgressBar(slot)) { | |
| 25 WhiteToGreyAndPush(value_heap_obj, value_bit); | |
| 26 RestartIfNotMarking(); | |
| 27 } else { | |
| 28 return false; | |
| 29 } | |
| 30 } else { | |
| 31 BlackToGreyAndUnshift(obj, obj_bit); | |
| 32 RestartIfNotMarking(); | |
| 33 return false; | |
| 34 } | |
| 35 } else { | |
| 36 return false; | |
| 37 } | |
| 38 } | |
| 39 if (!is_compacting_) return false; | |
| 40 MarkBit obj_bit = Marking::MarkBitFrom(obj); | |
| 41 return Marking::IsBlack(obj_bit); | |
| 42 } | |
| 43 | |
| 44 | |
| 45 void IncrementalMarking::RecordWrite(HeapObject* obj, | |
| 46 Object** slot, | |
| 47 Object* value) { | |
| 48 if (IsMarking() && value->IsHeapObject()) { | |
| 49 RecordWriteSlow(obj, slot, value); | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 | |
| 54 void IncrementalMarking::RecordWriteOfCodeEntry(JSFunction* host, | |
| 55 Object** slot, | |
| 56 Code* value) { | |
| 57 if (IsMarking()) RecordWriteOfCodeEntrySlow(host, slot, value); | |
| 58 } | |
| 59 | |
| 60 | |
| 61 void IncrementalMarking::RecordWriteIntoCode(HeapObject* obj, | |
| 62 RelocInfo* rinfo, | |
| 63 Object* value) { | |
| 64 if (IsMarking() && value->IsHeapObject()) { | |
| 65 RecordWriteIntoCodeSlow(obj, rinfo, value); | |
| 66 } | |
| 67 } | |
| 68 | |
| 69 | |
| 70 void IncrementalMarking::RecordWrites(HeapObject* obj) { | |
| 71 if (IsMarking()) { | |
| 72 MarkBit obj_bit = Marking::MarkBitFrom(obj); | |
| 73 if (Marking::IsBlack(obj_bit)) { | |
| 74 MemoryChunk* chunk = MemoryChunk::FromAddress(obj->address()); | |
| 75 if (chunk->IsFlagSet(MemoryChunk::HAS_PROGRESS_BAR)) { | |
| 76 chunk->set_progress_bar(0); | |
| 77 } | |
| 78 BlackToGreyAndUnshift(obj, obj_bit); | |
| 79 RestartIfNotMarking(); | |
| 80 } | |
| 81 } | |
| 82 } | |
| 83 | |
| 84 | |
| 85 void IncrementalMarking::BlackToGreyAndUnshift(HeapObject* obj, | |
| 86 MarkBit mark_bit) { | |
| 87 DCHECK(Marking::MarkBitFrom(obj) == mark_bit); | |
| 88 DCHECK(obj->Size() >= 2*kPointerSize); | |
| 89 DCHECK(IsMarking()); | |
| 90 Marking::BlackToGrey(mark_bit); | |
| 91 int obj_size = obj->Size(); | |
| 92 MemoryChunk::IncrementLiveBytesFromGC(obj->address(), -obj_size); | |
| 93 bytes_scanned_ -= obj_size; | |
| 94 int64_t old_bytes_rescanned = bytes_rescanned_; | |
| 95 bytes_rescanned_ = old_bytes_rescanned + obj_size; | |
| 96 if ((bytes_rescanned_ >> 20) != (old_bytes_rescanned >> 20)) { | |
| 97 if (bytes_rescanned_ > 2 * heap_->PromotedSpaceSizeOfObjects()) { | |
| 98 // If we have queued twice the heap size for rescanning then we are | |
| 99 // going around in circles, scanning the same objects again and again | |
| 100 // as the program mutates the heap faster than we can incrementally | |
| 101 // trace it. In this case we switch to non-incremental marking in | |
| 102 // order to finish off this marking phase. | |
| 103 if (FLAG_trace_gc) { | |
| 104 PrintPID("Hurrying incremental marking because of lack of progress\n"); | |
| 105 } | |
| 106 marking_speed_ = kMaxMarkingSpeed; | |
| 107 } | |
| 108 } | |
| 109 | |
| 110 marking_deque_.UnshiftGrey(obj); | |
| 111 } | |
| 112 | |
| 113 | |
| 114 void IncrementalMarking::WhiteToGreyAndPush(HeapObject* obj, MarkBit mark_bit) { | |
| 115 Marking::WhiteToGrey(mark_bit); | |
| 116 marking_deque_.PushGrey(obj); | |
| 117 } | |
| 118 | |
| 119 | |
| 120 } } // namespace v8::internal | |
| 121 | |
| 122 #endif // V8_INCREMENTAL_MARKING_INL_H_ | |
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Chromium Code Reviews
Issue 437993003:
Move a bunch of GC related files to heap/ subdirectory (Closed)
Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge