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Issue 2009383002: Reland of "[heap] Fine-grained JSArrayBuffer tracking" (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 4 years, 6 months ago
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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/heap.h" 5 #include "src/heap/heap.h"
6 6
7 #include "src/accessors.h" 7 #include "src/accessors.h"
8 #include "src/api.h" 8 #include "src/api.h"
9 #include "src/ast/scopeinfo.h" 9 #include "src/ast/scopeinfo.h"
10 #include "src/base/bits.h" 10 #include "src/base/bits.h"
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1619 gc_state_ = SCAVENGE; 1619 gc_state_ = SCAVENGE;
1620 1620
1621 // Implements Cheney's copying algorithm 1621 // Implements Cheney's copying algorithm
1622 LOG(isolate_, ResourceEvent("scavenge", "begin")); 1622 LOG(isolate_, ResourceEvent("scavenge", "begin"));
1623 1623
1624 // Used for updating survived_since_last_expansion_ at function end. 1624 // Used for updating survived_since_last_expansion_ at function end.
1625 intptr_t survived_watermark = PromotedSpaceSizeOfObjects(); 1625 intptr_t survived_watermark = PromotedSpaceSizeOfObjects();
1626 1626
1627 scavenge_collector_->SelectScavengingVisitorsTable(); 1627 scavenge_collector_->SelectScavengingVisitorsTable();
1628 1628
1629 array_buffer_tracker()->PrepareDiscoveryInNewSpace();
1630
1631 // Flip the semispaces. After flipping, to space is empty, from space has 1629 // Flip the semispaces. After flipping, to space is empty, from space has
1632 // live objects. 1630 // live objects.
1633 new_space_.Flip(); 1631 new_space_.Flip();
1634 new_space_.ResetAllocationInfo(); 1632 new_space_.ResetAllocationInfo();
1635 1633
1636 // We need to sweep newly copied objects which can be either in the 1634 // We need to sweep newly copied objects which can be either in the
1637 // to space or promoted to the old generation. For to-space 1635 // to space or promoted to the old generation. For to-space
1638 // objects, we treat the bottom of the to space as a queue. Newly 1636 // objects, we treat the bottom of the to space as a queue. Newly
1639 // copied and unswept objects lie between a 'front' mark and the 1637 // copied and unswept objects lie between a 'front' mark and the
1640 // allocation pointer. 1638 // allocation pointer.
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1740 incremental_marking()->UpdateMarkingDequeAfterScavenge(); 1738 incremental_marking()->UpdateMarkingDequeAfterScavenge();
1741 1739
1742 ScavengeWeakObjectRetainer weak_object_retainer(this); 1740 ScavengeWeakObjectRetainer weak_object_retainer(this);
1743 ProcessYoungWeakReferences(&weak_object_retainer); 1741 ProcessYoungWeakReferences(&weak_object_retainer);
1744 1742
1745 DCHECK(new_space_front == new_space_.top()); 1743 DCHECK(new_space_front == new_space_.top());
1746 1744
1747 // Set age mark. 1745 // Set age mark.
1748 new_space_.set_age_mark(new_space_.top()); 1746 new_space_.set_age_mark(new_space_.top());
1749 1747
1750 array_buffer_tracker()->FreeDead(true); 1748 array_buffer_tracker()->FreeDeadInNewSpace();
1751 1749
1752 // Update how much has survived scavenge. 1750 // Update how much has survived scavenge.
1753 IncrementYoungSurvivorsCounter(static_cast<int>( 1751 IncrementYoungSurvivorsCounter(static_cast<int>(
1754 (PromotedSpaceSizeOfObjects() - survived_watermark) + new_space_.Size())); 1752 (PromotedSpaceSizeOfObjects() - survived_watermark) + new_space_.Size()));
1755 1753
1756 LOG(isolate_, ResourceEvent("scavenge", "end")); 1754 LOG(isolate_, ResourceEvent("scavenge", "end"));
1757 1755
1758 gc_state_ = NOT_IN_GC; 1756 gc_state_ = NOT_IN_GC;
1759 } 1757 }
1760 1758
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6371 } 6369 }
6372 6370
6373 6371
6374 // static 6372 // static
6375 int Heap::GetStaticVisitorIdForMap(Map* map) { 6373 int Heap::GetStaticVisitorIdForMap(Map* map) {
6376 return StaticVisitorBase::GetVisitorId(map); 6374 return StaticVisitorBase::GetVisitorId(map);
6377 } 6375 }
6378 6376
6379 } // namespace internal 6377 } // namespace internal
6380 } // namespace v8 6378 } // namespace v8
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