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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/heap/mark-compact.h" | 5 #include "src/heap/mark-compact.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/base/sys-info.h" | 9 #include "src/base/sys-info.h" |
| 10 #include "src/code-stubs.h" | 10 #include "src/code-stubs.h" |
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| 1794 intptr_t promoted_size_; | 1794 intptr_t promoted_size_; |
| 1795 intptr_t semispace_copied_size_; | 1795 intptr_t semispace_copied_size_; |
| 1796 HashMap* local_pretenuring_feedback_; | 1796 HashMap* local_pretenuring_feedback_; |
| 1797 }; | 1797 }; |
| 1798 | 1798 |
| 1799 class MarkCompactCollector::EvacuateNewSpacePageVisitor final | 1799 class MarkCompactCollector::EvacuateNewSpacePageVisitor final |
| 1800 : public MarkCompactCollector::HeapObjectVisitor { | 1800 : public MarkCompactCollector::HeapObjectVisitor { |
| 1801 public: | 1801 public: |
| 1802 EvacuateNewSpacePageVisitor() : promoted_size_(0) {} | 1802 EvacuateNewSpacePageVisitor() : promoted_size_(0) {} |
| 1803 | 1803 |
| 1804 static void MoveToOldSpace(Page* page, PagedSpace* owner) { | 1804 static void TryMoveToOldSpace(Page* page, PagedSpace* owner) { |
| 1805 page->heap()->new_space()->ReplaceWithEmptyPage(page); | 1805 if (page->heap()->new_space()->ReplaceWithEmptyPage(page)) { |
| 1806 Page* new_page = Page::ConvertNewToOld(page, owner); | 1806 Page* new_page = Page::ConvertNewToOld(page, owner); |
| 1807 new_page->SetFlag(Page::PAGE_NEW_OLD_PROMOTION); | 1807 new_page->SetFlag(Page::PAGE_NEW_OLD_PROMOTION); |
| 1808 } |
| 1808 } | 1809 } |
| 1809 | 1810 |
| 1810 inline bool Visit(HeapObject* object) { | 1811 inline bool Visit(HeapObject* object) { |
| 1811 if (V8_UNLIKELY(object->IsJSArrayBuffer())) { | 1812 if (V8_UNLIKELY(object->IsJSArrayBuffer())) { |
| 1812 object->GetHeap()->array_buffer_tracker()->Promote( | 1813 object->GetHeap()->array_buffer_tracker()->Promote( |
| 1813 JSArrayBuffer::cast(object)); | 1814 JSArrayBuffer::cast(object)); |
| 1814 } | 1815 } |
| 1815 RecordMigratedSlotVisitor visitor; | 1816 RecordMigratedSlotVisitor visitor; |
| 1816 object->IterateBodyFast(&visitor); | 1817 object->IterateBodyFast(&visitor); |
| 1817 promoted_size_ += object->Size(); | 1818 promoted_size_ += object->Size(); |
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| 3286 job.AddPage(page, &abandoned_pages); | 3287 job.AddPage(page, &abandoned_pages); |
| 3287 } | 3288 } |
| 3288 | 3289 |
| 3289 const Address age_mark = heap()->new_space()->age_mark(); | 3290 const Address age_mark = heap()->new_space()->age_mark(); |
| 3290 for (Page* page : newspace_evacuation_candidates_) { | 3291 for (Page* page : newspace_evacuation_candidates_) { |
| 3291 live_bytes += page->LiveBytes(); | 3292 live_bytes += page->LiveBytes(); |
| 3292 if (!page->NeverEvacuate() && | 3293 if (!page->NeverEvacuate() && |
| 3293 (page->LiveBytes() > Evacuator::PageEvacuationThreshold()) && | 3294 (page->LiveBytes() > Evacuator::PageEvacuationThreshold()) && |
| 3294 page->IsFlagSet(MemoryChunk::NEW_SPACE_BELOW_AGE_MARK) && | 3295 page->IsFlagSet(MemoryChunk::NEW_SPACE_BELOW_AGE_MARK) && |
| 3295 !page->Contains(age_mark)) { | 3296 !page->Contains(age_mark)) { |
| 3296 EvacuateNewSpacePageVisitor::MoveToOldSpace(page, heap()->old_space()); | 3297 EvacuateNewSpacePageVisitor::TryMoveToOldSpace(page, heap()->old_space()); |
| 3297 } | 3298 } |
| 3298 job.AddPage(page, &abandoned_pages); | 3299 job.AddPage(page, &abandoned_pages); |
| 3299 } | 3300 } |
| 3300 DCHECK_GE(job.NumberOfPages(), 1); | 3301 DCHECK_GE(job.NumberOfPages(), 1); |
| 3301 | 3302 |
| 3302 // Used for trace summary. | 3303 // Used for trace summary. |
| 3303 double compaction_speed = 0; | 3304 double compaction_speed = 0; |
| 3304 if (FLAG_trace_evacuation) { | 3305 if (FLAG_trace_evacuation) { |
| 3305 compaction_speed = heap()->tracer()->CompactionSpeedInBytesPerMillisecond(); | 3306 compaction_speed = heap()->tracer()->CompactionSpeedInBytesPerMillisecond(); |
| 3306 } | 3307 } |
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| 3946 MarkBit mark_bit = Marking::MarkBitFrom(host); | 3947 MarkBit mark_bit = Marking::MarkBitFrom(host); |
| 3947 if (Marking::IsBlack(mark_bit)) { | 3948 if (Marking::IsBlack(mark_bit)) { |
| 3948 RelocInfo rinfo(isolate(), pc, RelocInfo::CODE_TARGET, 0, host); | 3949 RelocInfo rinfo(isolate(), pc, RelocInfo::CODE_TARGET, 0, host); |
| 3949 RecordRelocSlot(host, &rinfo, target); | 3950 RecordRelocSlot(host, &rinfo, target); |
| 3950 } | 3951 } |
| 3951 } | 3952 } |
| 3952 } | 3953 } |
| 3953 | 3954 |
| 3954 } // namespace internal | 3955 } // namespace internal |
| 3955 } // namespace v8 | 3956 } // namespace v8 |
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