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
MarkBitFrom(Address addr)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
SetFlags(int flags)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
MarkObject(HeapObject * obj,MarkBit mark_bit)33 void MarkCompactCollector::MarkObject(HeapObject* obj, MarkBit mark_bit) {
34 ASSERT(Marking::MarkBitFrom(obj) == mark_bit);
35 if (!mark_bit.Get()) {
36 mark_bit.Set();
37 MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size());
38 ASSERT(IsMarked(obj));
39 ASSERT(obj->GetIsolate()->heap()->Contains(obj));
40 marking_deque_.PushBlack(obj);
41 }
42 }
43
44
SetMark(HeapObject * obj,MarkBit mark_bit)45 void MarkCompactCollector::SetMark(HeapObject* obj, MarkBit mark_bit) {
46 ASSERT(!mark_bit.Get());
47 ASSERT(Marking::MarkBitFrom(obj) == mark_bit);
48 mark_bit.Set();
49 MemoryChunk::IncrementLiveBytesFromGC(obj->address(), obj->Size());
50 }
51
52
IsMarked(Object * obj)53 bool MarkCompactCollector::IsMarked(Object* obj) {
54 ASSERT(obj->IsHeapObject());
55 HeapObject* heap_object = HeapObject::cast(obj);
56 return Marking::MarkBitFrom(heap_object).Get();
57 }
58
59
RecordSlot(Object ** anchor_slot,Object ** slot,Object * object,SlotsBuffer::AdditionMode mode)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_
80