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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #include "src/base/atomicops.h" | 7 #include "src/base/atomicops.h" |
8 #include "src/base/bits.h" | 8 #include "src/base/bits.h" |
9 #include "src/code-stubs.h" | 9 #include "src/code-stubs.h" |
10 #include "src/compilation-cache.h" | 10 #include "src/compilation-cache.h" |
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2737 } | 2737 } |
2738 heap()->set_encountered_weak_collections(Smi::FromInt(0)); | 2738 heap()->set_encountered_weak_collections(Smi::FromInt(0)); |
2739 } | 2739 } |
2740 | 2740 |
2741 | 2741 |
2742 void MarkCompactCollector::ProcessAndClearWeakCells() { | 2742 void MarkCompactCollector::ProcessAndClearWeakCells() { |
2743 HeapObject* undefined = heap()->undefined_value(); | 2743 HeapObject* undefined = heap()->undefined_value(); |
2744 Object* weak_cell_obj = heap()->encountered_weak_cells(); | 2744 Object* weak_cell_obj = heap()->encountered_weak_cells(); |
2745 while (weak_cell_obj != Smi::FromInt(0)) { | 2745 while (weak_cell_obj != Smi::FromInt(0)) { |
2746 WeakCell* weak_cell = reinterpret_cast<WeakCell*>(weak_cell_obj); | 2746 WeakCell* weak_cell = reinterpret_cast<WeakCell*>(weak_cell_obj); |
2747 HeapObject* value = weak_cell->value(); | 2747 // We do not insert cleared weak cells into the list, so the value |
| 2748 // cannot be a Smi here. |
| 2749 HeapObject* value = HeapObject::cast(weak_cell->value()); |
2748 if (!MarkCompactCollector::IsMarked(value)) { | 2750 if (!MarkCompactCollector::IsMarked(value)) { |
2749 weak_cell->clear(undefined); | 2751 weak_cell->clear(); |
2750 } else { | 2752 } else { |
2751 Object** slot = HeapObject::RawField(weak_cell, WeakCell::kValueOffset); | 2753 Object** slot = HeapObject::RawField(weak_cell, WeakCell::kValueOffset); |
2752 heap()->mark_compact_collector()->RecordSlot(slot, slot, value); | 2754 heap()->mark_compact_collector()->RecordSlot(slot, slot, value); |
2753 } | 2755 } |
2754 weak_cell_obj = weak_cell->next(); | 2756 weak_cell_obj = weak_cell->next(); |
2755 weak_cell->set_next(undefined, SKIP_WRITE_BARRIER); | 2757 weak_cell->set_next(undefined, SKIP_WRITE_BARRIER); |
2756 } | 2758 } |
2757 heap()->set_encountered_weak_cells(Smi::FromInt(0)); | 2759 heap()->set_encountered_weak_cells(Smi::FromInt(0)); |
2758 } | 2760 } |
2759 | 2761 |
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4449 SlotsBuffer* buffer = *buffer_address; | 4451 SlotsBuffer* buffer = *buffer_address; |
4450 while (buffer != NULL) { | 4452 while (buffer != NULL) { |
4451 SlotsBuffer* next_buffer = buffer->next(); | 4453 SlotsBuffer* next_buffer = buffer->next(); |
4452 DeallocateBuffer(buffer); | 4454 DeallocateBuffer(buffer); |
4453 buffer = next_buffer; | 4455 buffer = next_buffer; |
4454 } | 4456 } |
4455 *buffer_address = NULL; | 4457 *buffer_address = NULL; |
4456 } | 4458 } |
4457 } | 4459 } |
4458 } // namespace v8::internal | 4460 } // namespace v8::internal |
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