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Issue 1158623003: Just clear semi-space mark bits once before Scavenge (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 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/v8.h" 5 #include "src/v8.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/base/bits.h" 9 #include "src/base/bits.h"
10 #include "src/base/once.h" 10 #include "src/base/once.h"
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1586 LOG(isolate_, ResourceEvent("scavenge", "begin")); 1586 LOG(isolate_, ResourceEvent("scavenge", "begin"));
1587 1587
1588 // Clear descriptor cache. 1588 // Clear descriptor cache.
1589 isolate_->descriptor_lookup_cache()->Clear(); 1589 isolate_->descriptor_lookup_cache()->Clear();
1590 1590
1591 // Used for updating survived_since_last_expansion_ at function end. 1591 // Used for updating survived_since_last_expansion_ at function end.
1592 intptr_t survived_watermark = PromotedSpaceSizeOfObjects(); 1592 intptr_t survived_watermark = PromotedSpaceSizeOfObjects();
1593 1593
1594 SelectScavengingVisitorsTable(); 1594 SelectScavengingVisitorsTable();
1595 1595
1596 incremental_marking()->PrepareForScavenge();
1597
1598 // Flip the semispaces. After flipping, to space is empty, from space has 1596 // Flip the semispaces. After flipping, to space is empty, from space has
1599 // live objects. 1597 // live objects.
1600 new_space_.Flip(); 1598 new_space_.Flip();
1601 new_space_.ResetAllocationInfo(); 1599 new_space_.ResetAllocationInfo();
1602 1600
1603 // We need to sweep newly copied objects which can be either in the 1601 // We need to sweep newly copied objects which can be either in the
1604 // to space or promoted to the old generation. For to-space 1602 // to space or promoted to the old generation. For to-space
1605 // objects, we treat the bottom of the to space as a queue. Newly 1603 // objects, we treat the bottom of the to space as a queue. Newly
1606 // copied and unswept objects lie between a 'front' mark and the 1604 // copied and unswept objects lie between a 'front' mark and the
1607 // allocation pointer. 1605 // allocation pointer.
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6614 *object_type = "CODE_TYPE"; \ 6612 *object_type = "CODE_TYPE"; \
6615 *object_sub_type = "CODE_AGE/" #name; \ 6613 *object_sub_type = "CODE_AGE/" #name; \
6616 return true; 6614 return true;
6617 CODE_AGE_LIST_COMPLETE(COMPARE_AND_RETURN_NAME) 6615 CODE_AGE_LIST_COMPLETE(COMPARE_AND_RETURN_NAME)
6618 #undef COMPARE_AND_RETURN_NAME 6616 #undef COMPARE_AND_RETURN_NAME
6619 } 6617 }
6620 return false; 6618 return false;
6621 } 6619 }
6622 } 6620 }
6623 } // namespace v8::internal 6621 } // namespace v8::internal
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