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1 /* | 1 /* |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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92 , m_startOfStack(reinterpret_cast<intptr_t*>(StackFrameDepth::getStackStart(
))) | 92 , m_startOfStack(reinterpret_cast<intptr_t*>(StackFrameDepth::getStackStart(
))) |
93 , m_endOfStack(reinterpret_cast<intptr_t*>(StackFrameDepth::getStackStart())
) | 93 , m_endOfStack(reinterpret_cast<intptr_t*>(StackFrameDepth::getStackStart())
) |
94 , m_safePointScopeMarker(nullptr) | 94 , m_safePointScopeMarker(nullptr) |
95 , m_atSafePoint(false) | 95 , m_atSafePoint(false) |
96 , m_interruptors() | 96 , m_interruptors() |
97 , m_sweepForbidden(false) | 97 , m_sweepForbidden(false) |
98 , m_noAllocationCount(0) | 98 , m_noAllocationCount(0) |
99 , m_gcForbiddenCount(0) | 99 , m_gcForbiddenCount(0) |
100 , m_persistentAllocated(0) | 100 , m_persistentAllocated(0) |
101 , m_persistentFreed(0) | 101 , m_persistentFreed(0) |
| 102 , m_disposedV8ContextCount(0) |
102 , m_vectorBackingHeapIndex(Vector1HeapIndex) | 103 , m_vectorBackingHeapIndex(Vector1HeapIndex) |
103 , m_currentHeapAges(0) | 104 , m_currentHeapAges(0) |
104 , m_isTerminating(false) | 105 , m_isTerminating(false) |
105 , m_gcMixinMarker(nullptr) | 106 , m_gcMixinMarker(nullptr) |
106 , m_shouldFlushHeapDoesNotContainCache(false) | 107 , m_shouldFlushHeapDoesNotContainCache(false) |
107 , m_gcState(NoGCScheduled) | 108 , m_gcState(NoGCScheduled) |
108 , m_traceDOMWrappers(nullptr) | 109 , m_traceDOMWrappers(nullptr) |
109 #if defined(ADDRESS_SANITIZER) | 110 #if defined(ADDRESS_SANITIZER) |
110 , m_asanFakeStack(__asan_get_current_fake_stack()) | 111 , m_asanFakeStack(__asan_get_current_fake_stack()) |
111 #endif | 112 #endif |
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724 schedulePageNavigationGC(); | 725 schedulePageNavigationGC(); |
725 } | 726 } |
726 | 727 |
727 void ThreadState::schedulePageNavigationGC() | 728 void ThreadState::schedulePageNavigationGC() |
728 { | 729 { |
729 ASSERT(checkThread()); | 730 ASSERT(checkThread()); |
730 ASSERT(!isSweepingInProgress()); | 731 ASSERT(!isSweepingInProgress()); |
731 setGCState(PageNavigationGCScheduled); | 732 setGCState(PageNavigationGCScheduled); |
732 } | 733 } |
733 | 734 |
| 735 void ThreadState::v8ContextCreated() |
| 736 { |
| 737 if (m_disposedV8ContextCount >= 5) { |
| 738 // A frame retains a lot of memory in the V8 side. V8's GC cannot |
| 739 // collect the memory until Oilpan's GC collects the frame. So we |
| 740 // force a conservative GC if no Oilpan's GC has been observed in |
| 741 // the past 5 frame navigations. |
| 742 // |
| 743 // We force a conservative GC not in v8ContextDisposed but in |
| 744 // v8ContextCreated. This avoids triggering too many conservative |
| 745 // GCs when a frame that has a lot of iframes gets detached. |
| 746 Heap::collectGarbage(HeapPointersOnStack, GCWithoutSweep, Heap::Conserva
tiveGC); |
| 747 return; |
| 748 } |
| 749 } |
| 750 |
| 751 void ThreadState::v8ContextDisposed() |
| 752 { |
| 753 ++m_disposedV8ContextCount; |
| 754 } |
| 755 |
734 void ThreadState::scheduleGCIfNeeded() | 756 void ThreadState::scheduleGCIfNeeded() |
735 { | 757 { |
736 ASSERT(checkThread()); | 758 ASSERT(checkThread()); |
737 Heap::reportMemoryUsageForTracing(); | 759 Heap::reportMemoryUsageForTracing(); |
738 | 760 |
739 if (isGCForbidden()) | 761 if (isGCForbidden()) |
740 return; | 762 return; |
741 | 763 |
742 // Allocation is allowed during sweeping, but those allocations should not | 764 // Allocation is allowed during sweeping, but those allocations should not |
743 // trigger nested GCs. | 765 // trigger nested GCs. |
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996 } | 1018 } |
997 | 1019 |
998 void ThreadState::preGC() | 1020 void ThreadState::preGC() |
999 { | 1021 { |
1000 ASSERT(!isInGC()); | 1022 ASSERT(!isInGC()); |
1001 setGCState(GCRunning); | 1023 setGCState(GCRunning); |
1002 makeConsistentForGC(); | 1024 makeConsistentForGC(); |
1003 flushHeapDoesNotContainCacheIfNeeded(); | 1025 flushHeapDoesNotContainCacheIfNeeded(); |
1004 clearHeapAges(); | 1026 clearHeapAges(); |
1005 updatePersistentCounters(); | 1027 updatePersistentCounters(); |
| 1028 m_disposedV8ContextCount = 0; |
1006 } | 1029 } |
1007 | 1030 |
1008 void ThreadState::postGC(GCType gcType) | 1031 void ThreadState::postGC(GCType gcType) |
1009 { | 1032 { |
1010 ASSERT(isInGC()); | 1033 ASSERT(isInGC()); |
1011 | 1034 |
1012 #if ENABLE(GC_PROFILING) | 1035 #if ENABLE(GC_PROFILING) |
1013 // We snapshot the heap prior to sweeping to get numbers for both resources | 1036 // We snapshot the heap prior to sweeping to get numbers for both resources |
1014 // that have been allocated since the last GC and for resources that are | 1037 // that have been allocated since the last GC and for resources that are |
1015 // going to be freed. | 1038 // going to be freed. |
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1622 json->beginArray(it->key.ascii().data()); | 1645 json->beginArray(it->key.ascii().data()); |
1623 for (size_t age = 0; age <= maxHeapObjectAge; ++age) | 1646 for (size_t age = 0; age <= maxHeapObjectAge; ++age) |
1624 json->pushInteger(it->value.ages[age]); | 1647 json->pushInteger(it->value.ages[age]); |
1625 json->endArray(); | 1648 json->endArray(); |
1626 } | 1649 } |
1627 TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(TRACE_DISABLED_BY_DEFAULT("blink_gc"), s
tatsName, this, json.release()); | 1650 TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(TRACE_DISABLED_BY_DEFAULT("blink_gc"), s
tatsName, this, json.release()); |
1628 } | 1651 } |
1629 #endif | 1652 #endif |
1630 | 1653 |
1631 } // namespace blink | 1654 } // namespace blink |
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