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| 1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 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 #ifndef V8_HEAP_SCAVENGER_H_ | 5 #ifndef V8_HEAP_SCAVENGER_H_ |
| 6 #define V8_HEAP_SCAVENGER_H_ | 6 #define V8_HEAP_SCAVENGER_H_ |
| 7 | 7 |
| 8 #include "src/heap/objects-visiting.h" | 8 #include "src/heap/objects-visiting.h" |
| 9 #include "src/heap/slot-set.h" |
| 9 | 10 |
| 10 namespace v8 { | 11 namespace v8 { |
| 11 namespace internal { | 12 namespace internal { |
| 12 | 13 |
| 13 typedef void (*ScavengingCallback)(Map* map, HeapObject** slot, | 14 typedef void (*ScavengingCallback)(Map* map, HeapObject** slot, |
| 14 HeapObject* object); | 15 HeapObject* object); |
| 15 | 16 |
| 16 class Scavenger { | 17 class Scavenger { |
| 17 public: | 18 public: |
| 18 explicit Scavenger(Heap* heap) : heap_(heap) {} | 19 explicit Scavenger(Heap* heap) : heap_(heap) {} |
| 19 | 20 |
| 20 // Initializes static visitor dispatch tables. | 21 // Initializes static visitor dispatch tables. |
| 21 static void Initialize(); | 22 static void Initialize(); |
| 22 | 23 |
| 23 // Callback function passed to Heap::Iterate etc. Copies an object if | 24 // Callback function passed to Heap::Iterate etc. Copies an object if |
| 24 // necessary, the object might be promoted to an old space. The caller must | 25 // necessary, the object might be promoted to an old space. The caller must |
| 25 // ensure the precondition that the object is (a) a heap object and (b) in | 26 // ensure the precondition that the object is (a) a heap object and (b) in |
| 26 // the heap's from space. | 27 // the heap's from space. |
| 27 static inline void ScavengeObject(HeapObject** p, HeapObject* object); | 28 static inline void ScavengeObject(HeapObject** p, HeapObject* object); |
| 29 static inline SlotCallbackResult CheckAndScavengeObject(Heap* heap, |
| 30 Address slot_address); |
| 28 | 31 |
| 29 // Slow part of {ScavengeObject} above. | 32 // Slow part of {ScavengeObject} above. |
| 30 static void ScavengeObjectSlow(HeapObject** p, HeapObject* object); | 33 static void ScavengeObjectSlow(HeapObject** p, HeapObject* object); |
| 31 | 34 |
| 32 // Chooses an appropriate static visitor table depending on the current state | 35 // Chooses an appropriate static visitor table depending on the current state |
| 33 // of the heap (i.e. incremental marking, logging and profiling). | 36 // of the heap (i.e. incremental marking, logging and profiling). |
| 34 void SelectScavengingVisitorsTable(); | 37 void SelectScavengingVisitorsTable(); |
| 35 | 38 |
| 36 Isolate* isolate(); | 39 Isolate* isolate(); |
| 37 Heap* heap() { return heap_; } | 40 Heap* heap() { return heap_; } |
| (...skipping 25 matching lines...) Expand all Loading... |
| 63 class StaticScavengeVisitor | 66 class StaticScavengeVisitor |
| 64 : public StaticNewSpaceVisitor<StaticScavengeVisitor> { | 67 : public StaticNewSpaceVisitor<StaticScavengeVisitor> { |
| 65 public: | 68 public: |
| 66 static inline void VisitPointer(Heap* heap, HeapObject* object, Object** p); | 69 static inline void VisitPointer(Heap* heap, HeapObject* object, Object** p); |
| 67 }; | 70 }; |
| 68 | 71 |
| 69 } // namespace internal | 72 } // namespace internal |
| 70 } // namespace v8 | 73 } // namespace v8 |
| 71 | 74 |
| 72 #endif // V8_HEAP_SCAVENGER_H_ | 75 #endif // V8_HEAP_SCAVENGER_H_ |
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