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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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3062 // At this point, we may be deserializing the heap from a snapshot, and | 3062 // At this point, we may be deserializing the heap from a snapshot, and |
3063 // none of the maps have been created yet and are NULL. | 3063 // none of the maps have been created yet and are NULL. |
3064 DCHECK((filler->map() == NULL && !deserialization_complete_) || | 3064 DCHECK((filler->map() == NULL && !deserialization_complete_) || |
3065 filler->map()->IsMap()); | 3065 filler->map()->IsMap()); |
3066 } | 3066 } |
3067 | 3067 |
3068 | 3068 |
3069 bool Heap::CanMoveObjectStart(HeapObject* object) { | 3069 bool Heap::CanMoveObjectStart(HeapObject* object) { |
3070 if (!FLAG_move_object_start) return false; | 3070 if (!FLAG_move_object_start) return false; |
3071 | 3071 |
| 3072 // Sampling heap profiler may have a reference to the object. |
| 3073 if (isolate()->heap_profiler()->is_sampling_allocations()) return false; |
| 3074 |
3072 Address address = object->address(); | 3075 Address address = object->address(); |
3073 | 3076 |
3074 if (lo_space()->Contains(object)) return false; | 3077 if (lo_space()->Contains(object)) return false; |
3075 | 3078 |
3076 Page* page = Page::FromAddress(address); | 3079 Page* page = Page::FromAddress(address); |
3077 // We can move the object start if: | 3080 // We can move the object start if: |
3078 // (1) the object is not in old space, | 3081 // (1) the object is not in old space, |
3079 // (2) the page of the object was already swept, | 3082 // (2) the page of the object was already swept, |
3080 // (3) the page was already concurrently swept. This case is an optimization | 3083 // (3) the page was already concurrently swept. This case is an optimization |
3081 // for concurrent sweeping. The WasSwept predicate for concurrently swept | 3084 // for concurrent sweeping. The WasSwept predicate for concurrently swept |
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6326 } | 6329 } |
6327 | 6330 |
6328 | 6331 |
6329 // static | 6332 // static |
6330 int Heap::GetStaticVisitorIdForMap(Map* map) { | 6333 int Heap::GetStaticVisitorIdForMap(Map* map) { |
6331 return StaticVisitorBase::GetVisitorId(map); | 6334 return StaticVisitorBase::GetVisitorId(map); |
6332 } | 6335 } |
6333 | 6336 |
6334 } // namespace internal | 6337 } // namespace internal |
6335 } // namespace v8 | 6338 } // namespace v8 |
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