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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_MARK_COMPACT_INL_H_ | |
6 #define V8_MARK_COMPACT_INL_H_ | |
7 | |
8 #include <memory.h> | |
9 | |
10 #include "src/isolate.h" | |
11 #include "src/mark-compact.h" | |
12 | |
13 | |
14 namespace v8 { | |
15 namespace internal { | |
16 | |
17 | |
18 MarkBit Marking::MarkBitFrom(Address addr) { | |
19 MemoryChunk* p = MemoryChunk::FromAddress(addr); | |
20 return p->markbits()->MarkBitFromIndex(p->AddressToMarkbitIndex(addr), | |
21 p->ContainsOnlyData()); | |
22 } | |
23 | |
24 | |
25 void MarkCompactCollector::SetFlags(int flags) { | |
26 sweep_precisely_ = ((flags & Heap::kSweepPreciselyMask) != 0); | |
27 reduce_memory_footprint_ = ((flags & Heap::kReduceMemoryFootprintMask) != 0); | |
28 abort_incremental_marking_ = | |
29 ((flags & Heap::kAbortIncrementalMarkingMask) != 0); | |
30 } | |
31 | |
32 | |
33 void MarkCompactCollector::MarkObject(HeapObject* obj, MarkBit mark_bit) { | |
34 DCHECK(Marking::MarkBitFrom(obj) == mark_bit); | |
35 if (!mark_bit.Get()) { | |
36 mark_bit.Set(); | |
37 MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size()); | |
38 DCHECK(IsMarked(obj)); | |
39 DCHECK(obj->GetIsolate()->heap()->Contains(obj)); | |
40 marking_deque_.PushBlack(obj); | |
41 } | |
42 } | |
43 | |
44 | |
45 void MarkCompactCollector::SetMark(HeapObject* obj, MarkBit mark_bit) { | |
46 DCHECK(!mark_bit.Get()); | |
47 DCHECK(Marking::MarkBitFrom(obj) == mark_bit); | |
48 mark_bit.Set(); | |
49 MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size()); | |
50 } | |
51 | |
52 | |
53 bool MarkCompactCollector::IsMarked(Object* obj) { | |
54 DCHECK(obj->IsHeapObject()); | |
55 HeapObject* heap_object = HeapObject::cast(obj); | |
56 return Marking::MarkBitFrom(heap_object).Get(); | |
57 } | |
58 | |
59 | |
60 void MarkCompactCollector::RecordSlot(Object** anchor_slot, | |
61 Object** slot, | |
62 Object* object, | |
63 SlotsBuffer::AdditionMode mode) { | |
64 Page* object_page = Page::FromAddress(reinterpret_cast<Address>(object)); | |
65 if (object_page->IsEvacuationCandidate() && | |
66 !ShouldSkipEvacuationSlotRecording(anchor_slot)) { | |
67 if (!SlotsBuffer::AddTo(&slots_buffer_allocator_, | |
68 object_page->slots_buffer_address(), | |
69 slot, | |
70 mode)) { | |
71 EvictEvacuationCandidate(object_page); | |
72 } | |
73 } | |
74 } | |
75 | |
76 | |
77 } } // namespace v8::internal | |
78 | |
79 #endif // V8_MARK_COMPACT_INL_H_ | |
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