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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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554 // We were not able to sweep that page, i.e., a concurrent | 554 // We were not able to sweep that page, i.e., a concurrent |
555 // sweeper thread currently owns this page. Wait for the sweeper | 555 // sweeper thread currently owns this page. Wait for the sweeper |
556 // thread to be done with this page. | 556 // thread to be done with this page. |
557 page->WaitUntilSweepingCompleted(); | 557 page->WaitUntilSweepingCompleted(); |
558 } | 558 } |
559 } | 559 } |
560 } | 560 } |
561 | 561 |
562 | 562 |
563 void MarkCompactCollector::SweepAndRefill(CompactionSpace* space) { | 563 void MarkCompactCollector::SweepAndRefill(CompactionSpace* space) { |
564 if (heap()->concurrent_sweeping_enabled() && !IsSweepingCompleted()) { | 564 if (FLAG_concurrent_sweeping && !IsSweepingCompleted()) { |
565 SweepInParallel(heap()->paged_space(space->identity()), 0); | 565 SweepInParallel(heap()->paged_space(space->identity()), 0); |
566 space->RefillFreeList(); | 566 space->RefillFreeList(); |
567 } | 567 } |
568 } | 568 } |
569 | 569 |
570 | 570 |
571 void MarkCompactCollector::EnsureSweepingCompleted() { | 571 void MarkCompactCollector::EnsureSweepingCompleted() { |
572 DCHECK(sweeping_in_progress_ == true); | 572 DCHECK(sweeping_in_progress_ == true); |
573 | 573 |
574 // If sweeping is not completed or not running at all, we try to complete it | 574 // If sweeping is not completed or not running at all, we try to complete it |
575 // here. | 575 // here. |
576 if (!heap()->concurrent_sweeping_enabled() || !IsSweepingCompleted()) { | 576 if (!FLAG_concurrent_sweeping || !IsSweepingCompleted()) { |
577 SweepInParallel(heap()->paged_space(OLD_SPACE), 0); | 577 SweepInParallel(heap()->paged_space(OLD_SPACE), 0); |
578 SweepInParallel(heap()->paged_space(CODE_SPACE), 0); | 578 SweepInParallel(heap()->paged_space(CODE_SPACE), 0); |
579 SweepInParallel(heap()->paged_space(MAP_SPACE), 0); | 579 SweepInParallel(heap()->paged_space(MAP_SPACE), 0); |
580 } | 580 } |
581 | 581 |
582 if (heap()->concurrent_sweeping_enabled()) { | 582 if (FLAG_concurrent_sweeping) { |
583 pending_sweeper_tasks_semaphore_.Wait(); | 583 pending_sweeper_tasks_semaphore_.Wait(); |
584 pending_sweeper_tasks_semaphore_.Wait(); | 584 pending_sweeper_tasks_semaphore_.Wait(); |
585 pending_sweeper_tasks_semaphore_.Wait(); | 585 pending_sweeper_tasks_semaphore_.Wait(); |
586 } | 586 } |
587 | 587 |
588 ParallelSweepSpacesComplete(); | 588 ParallelSweepSpacesComplete(); |
589 sweeping_in_progress_ = false; | 589 sweeping_in_progress_ = false; |
590 heap()->old_space()->RefillFreeList(); | 590 heap()->old_space()->RefillFreeList(); |
591 heap()->code_space()->RefillFreeList(); | 591 heap()->code_space()->RefillFreeList(); |
592 heap()->map_space()->RefillFreeList(); | 592 heap()->map_space()->RefillFreeList(); |
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3841 GCTracer::Scope sweep_scope(heap()->tracer(), | 3841 GCTracer::Scope sweep_scope(heap()->tracer(), |
3842 GCTracer::Scope::MC_SWEEP_CODE); | 3842 GCTracer::Scope::MC_SWEEP_CODE); |
3843 SweepSpace(heap()->code_space(), CONCURRENT_SWEEPING); | 3843 SweepSpace(heap()->code_space(), CONCURRENT_SWEEPING); |
3844 } | 3844 } |
3845 { | 3845 { |
3846 GCTracer::Scope sweep_scope(heap()->tracer(), | 3846 GCTracer::Scope sweep_scope(heap()->tracer(), |
3847 GCTracer::Scope::MC_SWEEP_MAP); | 3847 GCTracer::Scope::MC_SWEEP_MAP); |
3848 SweepSpace(heap()->map_space(), CONCURRENT_SWEEPING); | 3848 SweepSpace(heap()->map_space(), CONCURRENT_SWEEPING); |
3849 } | 3849 } |
3850 sweeping_in_progress_ = true; | 3850 sweeping_in_progress_ = true; |
3851 if (heap()->concurrent_sweeping_enabled()) { | 3851 if (FLAG_concurrent_sweeping) { |
3852 StartSweeperThreads(); | 3852 StartSweeperThreads(); |
3853 } | 3853 } |
3854 } | 3854 } |
3855 | 3855 |
3856 // Deallocate unmarked large objects. | 3856 // Deallocate unmarked large objects. |
3857 heap_->lo_space()->FreeUnmarkedObjects(); | 3857 heap_->lo_space()->FreeUnmarkedObjects(); |
3858 | 3858 |
3859 // Give pages that are queued to be freed back to the OS. Invalid store | 3859 // Give pages that are queued to be freed back to the OS. Invalid store |
3860 // buffer entries are already filter out. We can just release the memory. | 3860 // buffer entries are already filter out. We can just release the memory. |
3861 heap()->FreeQueuedChunks(); | 3861 heap()->FreeQueuedChunks(); |
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3974 MarkBit mark_bit = Marking::MarkBitFrom(host); | 3974 MarkBit mark_bit = Marking::MarkBitFrom(host); |
3975 if (Marking::IsBlack(mark_bit)) { | 3975 if (Marking::IsBlack(mark_bit)) { |
3976 RelocInfo rinfo(isolate(), pc, RelocInfo::CODE_TARGET, 0, host); | 3976 RelocInfo rinfo(isolate(), pc, RelocInfo::CODE_TARGET, 0, host); |
3977 RecordRelocSlot(&rinfo, target); | 3977 RecordRelocSlot(&rinfo, target); |
3978 } | 3978 } |
3979 } | 3979 } |
3980 } | 3980 } |
3981 | 3981 |
3982 } // namespace internal | 3982 } // namespace internal |
3983 } // namespace v8 | 3983 } // namespace v8 |
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