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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 ASSERT(obj->IsHeapObject()); | 76 ASSERT(obj->IsHeapObject()); |
77 HeapObject* heap_object = HeapObject::cast(obj); | 77 HeapObject* heap_object = HeapObject::cast(obj); |
78 return Marking::MarkBitFrom(heap_object).Get(); | 78 return Marking::MarkBitFrom(heap_object).Get(); |
79 } | 79 } |
80 | 80 |
81 | 81 |
82 void MarkCompactCollector::RecordSlot(Object** anchor_slot, | 82 void MarkCompactCollector::RecordSlot(Object** anchor_slot, |
83 Object** slot, | 83 Object** slot, |
84 Object* object) { | 84 Object* object) { |
85 Page* object_page = Page::FromAddress(reinterpret_cast<Address>(object)); | 85 Page* object_page = Page::FromAddress(reinterpret_cast<Address>(object)); |
| 86 // Ensure the anchor slot is on the first 'page' of a large object. |
| 87 ASSERT(Page::FromAddress(reinterpret_cast<Address>(anchor_slot))->owner() != |
| 88 NULL); |
86 if (object_page->IsEvacuationCandidate() && | 89 if (object_page->IsEvacuationCandidate() && |
87 !ShouldSkipEvacuationSlotRecording(anchor_slot)) { | 90 !ShouldSkipEvacuationSlotRecording(anchor_slot)) { |
88 if (!SlotsBuffer::AddTo(&slots_buffer_allocator_, | 91 if (!SlotsBuffer::AddTo(&slots_buffer_allocator_, |
89 object_page->slots_buffer_address(), | 92 object_page->slots_buffer_address(), |
90 slot, | 93 slot, |
91 SlotsBuffer::FAIL_ON_OVERFLOW)) { | 94 SlotsBuffer::FAIL_ON_OVERFLOW)) { |
92 EvictEvacuationCandidate(object_page); | 95 EvictEvacuationCandidate(object_page); |
93 } | 96 } |
94 } | 97 } |
95 } | 98 } |
96 | 99 |
97 | 100 |
98 } } // namespace v8::internal | 101 } } // namespace v8::internal |
99 | 102 |
100 #endif // V8_MARK_COMPACT_INL_H_ | 103 #endif // V8_MARK_COMPACT_INL_H_ |
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