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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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| 475 // TODO(gc) consider setting this to some low level so that some | 475 // TODO(gc) consider setting this to some low level so that some |
| 476 // debug tests run with incremental marking and some without. | 476 // debug tests run with incremental marking and some without. |
| 477 static const intptr_t kActivationThreshold = 0; | 477 static const intptr_t kActivationThreshold = 0; |
| 478 #endif | 478 #endif |
| 479 // Only start incremental marking in a safe state: 1) when incremental | 479 // Only start incremental marking in a safe state: 1) when incremental |
| 480 // marking is turned on, 2) when we are currently not in a GC, and | 480 // marking is turned on, 2) when we are currently not in a GC, and |
| 481 // 3) when we are currently not serializing or deserializing the heap. | 481 // 3) when we are currently not serializing or deserializing the heap. |
| 482 return FLAG_incremental_marking && | 482 return FLAG_incremental_marking && |
| 483 FLAG_incremental_marking_steps && | 483 FLAG_incremental_marking_steps && |
| 484 heap_->gc_state() == Heap::NOT_IN_GC && | 484 heap_->gc_state() == Heap::NOT_IN_GC && |
| 485 !Serializer::enabled() && | 485 !Serializer::enabled(heap_->isolate()) && |
| 486 heap_->isolate()->IsInitialized() && | 486 heap_->isolate()->IsInitialized() && |
| 487 heap_->PromotedSpaceSizeOfObjects() > kActivationThreshold; | 487 heap_->PromotedSpaceSizeOfObjects() > kActivationThreshold; |
| 488 } | 488 } |
| 489 | 489 |
| 490 | 490 |
| 491 void IncrementalMarking::ActivateGeneratedStub(Code* stub) { | 491 void IncrementalMarking::ActivateGeneratedStub(Code* stub) { |
| 492 ASSERT(RecordWriteStub::GetMode(stub) == | 492 ASSERT(RecordWriteStub::GetMode(stub) == |
| 493 RecordWriteStub::STORE_BUFFER_ONLY); | 493 RecordWriteStub::STORE_BUFFER_ONLY); |
| 494 | 494 |
| 495 if (!IsMarking()) { | 495 if (!IsMarking()) { |
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| 553 | 553 |
| 554 | 554 |
| 555 void IncrementalMarking::Start(CompactionFlag flag) { | 555 void IncrementalMarking::Start(CompactionFlag flag) { |
| 556 if (FLAG_trace_incremental_marking) { | 556 if (FLAG_trace_incremental_marking) { |
| 557 PrintF("[IncrementalMarking] Start\n"); | 557 PrintF("[IncrementalMarking] Start\n"); |
| 558 } | 558 } |
| 559 ASSERT(FLAG_incremental_marking); | 559 ASSERT(FLAG_incremental_marking); |
| 560 ASSERT(FLAG_incremental_marking_steps); | 560 ASSERT(FLAG_incremental_marking_steps); |
| 561 ASSERT(state_ == STOPPED); | 561 ASSERT(state_ == STOPPED); |
| 562 ASSERT(heap_->gc_state() == Heap::NOT_IN_GC); | 562 ASSERT(heap_->gc_state() == Heap::NOT_IN_GC); |
| 563 ASSERT(!Serializer::enabled()); | 563 ASSERT(!Serializer::enabled(heap_->isolate())); |
| 564 ASSERT(heap_->isolate()->IsInitialized()); | 564 ASSERT(heap_->isolate()->IsInitialized()); |
| 565 | 565 |
| 566 ResetStepCounters(); | 566 ResetStepCounters(); |
| 567 | 567 |
| 568 if (!heap_->mark_compact_collector()->IsConcurrentSweepingInProgress()) { | 568 if (!heap_->mark_compact_collector()->IsConcurrentSweepingInProgress()) { |
| 569 StartMarking(flag); | 569 StartMarking(flag); |
| 570 } else { | 570 } else { |
| 571 if (FLAG_trace_incremental_marking) { | 571 if (FLAG_trace_incremental_marking) { |
| 572 PrintF("[IncrementalMarking] Start sweeping.\n"); | 572 PrintF("[IncrementalMarking] Start sweeping.\n"); |
| 573 } | 573 } |
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| 1011 bytes_scanned_ = 0; | 1011 bytes_scanned_ = 0; |
| 1012 write_barriers_invoked_since_last_step_ = 0; | 1012 write_barriers_invoked_since_last_step_ = 0; |
| 1013 } | 1013 } |
| 1014 | 1014 |
| 1015 | 1015 |
| 1016 int64_t IncrementalMarking::SpaceLeftInOldSpace() { | 1016 int64_t IncrementalMarking::SpaceLeftInOldSpace() { |
| 1017 return heap_->MaxOldGenerationSize() - heap_->PromotedSpaceSizeOfObjects(); | 1017 return heap_->MaxOldGenerationSize() - heap_->PromotedSpaceSizeOfObjects(); |
| 1018 } | 1018 } |
| 1019 | 1019 |
| 1020 } } // namespace v8::internal | 1020 } } // namespace v8::internal |
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