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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 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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2503 | 2503 |
2504 VisitorDispatchTable<ScavengingCallback> scavenging_visitors_table_; | 2504 VisitorDispatchTable<ScavengingCallback> scavenging_visitors_table_; |
2505 | 2505 |
2506 MemoryChunk* chunks_queued_for_free_; | 2506 MemoryChunk* chunks_queued_for_free_; |
2507 | 2507 |
2508 Mutex* relocation_mutex_; | 2508 Mutex* relocation_mutex_; |
2509 #ifdef DEBUG | 2509 #ifdef DEBUG |
2510 bool relocation_mutex_locked_by_optimizer_thread_; | 2510 bool relocation_mutex_locked_by_optimizer_thread_; |
2511 #endif // DEBUG; | 2511 #endif // DEBUG; |
2512 | 2512 |
| 2513 int gc_callbacks_depth_; |
| 2514 |
2513 friend class Factory; | 2515 friend class Factory; |
2514 friend class GCTracer; | 2516 friend class GCTracer; |
2515 friend class DisallowAllocationFailure; | 2517 friend class DisallowAllocationFailure; |
2516 friend class AlwaysAllocateScope; | 2518 friend class AlwaysAllocateScope; |
2517 friend class Page; | 2519 friend class Page; |
2518 friend class Isolate; | 2520 friend class Isolate; |
2519 friend class MarkCompactCollector; | 2521 friend class MarkCompactCollector; |
2520 friend class MarkCompactMarkingVisitor; | 2522 friend class MarkCompactMarkingVisitor; |
2521 friend class MapCompact; | 2523 friend class MapCompact; |
2522 #ifdef VERIFY_HEAP | 2524 #ifdef VERIFY_HEAP |
2523 friend class NoWeakObjectVerificationScope; | 2525 friend class NoWeakObjectVerificationScope; |
2524 #endif | 2526 #endif |
| 2527 friend class GCCallbacksScope; |
2525 | 2528 |
2526 DISALLOW_COPY_AND_ASSIGN(Heap); | 2529 DISALLOW_COPY_AND_ASSIGN(Heap); |
2527 }; | 2530 }; |
2528 | 2531 |
2529 | 2532 |
2530 class HeapStats { | 2533 class HeapStats { |
2531 public: | 2534 public: |
2532 static const int kStartMarker = 0xDECADE00; | 2535 static const int kStartMarker = 0xDECADE00; |
2533 static const int kEndMarker = 0xDECADE01; | 2536 static const int kEndMarker = 0xDECADE01; |
2534 | 2537 |
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2587 | 2590 |
2588 #ifdef VERIFY_HEAP | 2591 #ifdef VERIFY_HEAP |
2589 class NoWeakObjectVerificationScope { | 2592 class NoWeakObjectVerificationScope { |
2590 public: | 2593 public: |
2591 inline NoWeakObjectVerificationScope(); | 2594 inline NoWeakObjectVerificationScope(); |
2592 inline ~NoWeakObjectVerificationScope(); | 2595 inline ~NoWeakObjectVerificationScope(); |
2593 }; | 2596 }; |
2594 #endif | 2597 #endif |
2595 | 2598 |
2596 | 2599 |
| 2600 class GCCallbacksScope { |
| 2601 public: |
| 2602 explicit inline GCCallbacksScope(Heap* heap); |
| 2603 inline ~GCCallbacksScope(); |
| 2604 |
| 2605 inline bool CheckReenter(); |
| 2606 |
| 2607 private: |
| 2608 Heap* heap_; |
| 2609 }; |
| 2610 |
| 2611 |
2597 // Visitor class to verify interior pointers in spaces that do not contain | 2612 // Visitor class to verify interior pointers in spaces that do not contain |
2598 // or care about intergenerational references. All heap object pointers have to | 2613 // or care about intergenerational references. All heap object pointers have to |
2599 // point into the heap to a location that has a map pointer at its first word. | 2614 // point into the heap to a location that has a map pointer at its first word. |
2600 // Caveat: Heap::Contains is an approximation because it can return true for | 2615 // Caveat: Heap::Contains is an approximation because it can return true for |
2601 // objects in a heap space but above the allocation pointer. | 2616 // objects in a heap space but above the allocation pointer. |
2602 class VerifyPointersVisitor: public ObjectVisitor { | 2617 class VerifyPointersVisitor: public ObjectVisitor { |
2603 public: | 2618 public: |
2604 inline void VisitPointers(Object** start, Object** end); | 2619 inline void VisitPointers(Object** start, Object** end); |
2605 }; | 2620 }; |
2606 | 2621 |
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3114 DisallowHeapAllocation no_allocation; // i.e. no gc allowed. | 3129 DisallowHeapAllocation no_allocation; // i.e. no gc allowed. |
3115 | 3130 |
3116 private: | 3131 private: |
3117 DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer); | 3132 DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer); |
3118 }; | 3133 }; |
3119 #endif // DEBUG | 3134 #endif // DEBUG |
3120 | 3135 |
3121 } } // namespace v8::internal | 3136 } } // namespace v8::internal |
3122 | 3137 |
3123 #endif // V8_HEAP_H_ | 3138 #endif // V8_HEAP_H_ |
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