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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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36 #include "wtf/Assertions.h" | 36 #include "wtf/Assertions.h" |
37 #include "wtf/Deque.h" | 37 #include "wtf/Deque.h" |
38 #include "wtf/Forward.h" | 38 #include "wtf/Forward.h" |
39 #include "wtf/HashMap.h" | 39 #include "wtf/HashMap.h" |
40 #include "wtf/HashTraits.h" | 40 #include "wtf/HashTraits.h" |
41 #include "wtf/InstanceCounter.h" | 41 #include "wtf/InstanceCounter.h" |
42 #include "wtf/OwnPtr.h" | 42 #include "wtf/OwnPtr.h" |
43 #include "wtf/RefPtr.h" | 43 #include "wtf/RefPtr.h" |
44 #include "wtf/TypeTraits.h" | 44 #include "wtf/TypeTraits.h" |
45 #include "wtf/WeakPtr.h" | 45 #include "wtf/WeakPtr.h" |
46 #if ENABLE(GC_TRACING) | 46 #if ENABLE(GC_PROFILING) |
47 #include "wtf/text/WTFString.h" | 47 #include "wtf/text/WTFString.h" |
48 #endif | 48 #endif |
49 | 49 |
50 #if ENABLE(ASSERT) | 50 #if ENABLE(ASSERT) |
51 #define DEBUG_ONLY(x) x | 51 #define DEBUG_ONLY(x) x |
52 #else | 52 #else |
53 #define DEBUG_ONLY(x) | 53 #define DEBUG_ONLY(x) |
54 #endif | 54 #endif |
55 | 55 |
56 namespace blink { | 56 namespace blink { |
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82 // the garbage collector determines that the object is no longer | 82 // the garbage collector determines that the object is no longer |
83 // reachable. There is a GCInfo struct for each class that directly | 83 // reachable. There is a GCInfo struct for each class that directly |
84 // inherits from GarbageCollected or GarbageCollectedFinalized. | 84 // inherits from GarbageCollected or GarbageCollectedFinalized. |
85 struct GCInfo { | 85 struct GCInfo { |
86 bool hasFinalizer() const { return m_nonTrivialFinalizer; } | 86 bool hasFinalizer() const { return m_nonTrivialFinalizer; } |
87 bool hasVTable() const { return m_hasVTable; } | 87 bool hasVTable() const { return m_hasVTable; } |
88 TraceCallback m_trace; | 88 TraceCallback m_trace; |
89 FinalizationCallback m_finalize; | 89 FinalizationCallback m_finalize; |
90 bool m_nonTrivialFinalizer; | 90 bool m_nonTrivialFinalizer; |
91 bool m_hasVTable; | 91 bool m_hasVTable; |
92 #if ENABLE(GC_TRACING) | 92 #if ENABLE(GC_PROFILING) |
93 // |m_className| is held as a reference to prevent dtor being called at exit
. | 93 // |m_className| is held as a reference to prevent dtor being called at exit
. |
94 const String& m_className; | 94 const String& m_className; |
95 #endif | 95 #endif |
96 }; | 96 }; |
97 | 97 |
98 // The FinalizerTraitImpl specifies how to finalize objects. Object | 98 // The FinalizerTraitImpl specifies how to finalize objects. Object |
99 // that inherit from GarbageCollectedFinalized are finalized by | 99 // that inherit from GarbageCollectedFinalized are finalized by |
100 // calling their 'finalize' method which by default will call the | 100 // calling their 'finalize' method which by default will call the |
101 // destructor on the object. | 101 // destructor on the object. |
102 template<typename T, bool isGarbageCollectedFinalized> | 102 template<typename T, bool isGarbageCollectedFinalized> |
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409 | 409 |
410 // Macro to declare methods needed for each typed heap. | 410 // Macro to declare methods needed for each typed heap. |
411 #define DECLARE_VISITOR_METHODS(Type) \ | 411 #define DECLARE_VISITOR_METHODS(Type) \ |
412 DEBUG_ONLY(void checkGCInfo(const Type*, const GCInfo*);) \ | 412 DEBUG_ONLY(void checkGCInfo(const Type*, const GCInfo*);) \ |
413 virtual void mark(const Type*, TraceCallback) = 0; \ | 413 virtual void mark(const Type*, TraceCallback) = 0; \ |
414 virtual bool isMarked(const Type*) = 0; | 414 virtual bool isMarked(const Type*) = 0; |
415 | 415 |
416 FOR_EACH_TYPED_HEAP(DECLARE_VISITOR_METHODS) | 416 FOR_EACH_TYPED_HEAP(DECLARE_VISITOR_METHODS) |
417 #undef DECLARE_VISITOR_METHODS | 417 #undef DECLARE_VISITOR_METHODS |
418 | 418 |
419 #if ENABLE(GC_TRACING) | 419 #if ENABLE(GC_PROFILE_MARKING) |
420 void setHostInfo(void* object, const String& name) | 420 void setHostInfo(void* object, const String& name) |
421 { | 421 { |
422 m_hostObject = object; | 422 m_hostObject = object; |
423 m_hostName = name; | 423 m_hostName = name; |
424 } | 424 } |
425 #endif | 425 #endif |
426 | 426 |
427 protected: | 427 protected: |
428 virtual void registerWeakCell(void**, WeakPointerCallback) = 0; | 428 virtual void registerWeakCell(void**, WeakPointerCallback) = 0; |
429 #if ENABLE(GC_TRACING) | 429 #if ENABLE(GC_PROFILE_MARKING) |
430 void* m_hostObject; | 430 void* m_hostObject; |
431 String m_hostName; | 431 String m_hostName; |
432 #endif | 432 #endif |
433 | 433 |
434 private: | 434 private: |
435 template<typename T> | 435 template<typename T> |
436 static void handleWeakCell(Visitor* self, void* obj) | 436 static void handleWeakCell(Visitor* self, void* obj) |
437 { | 437 { |
438 T** cell = reinterpret_cast<T**>(obj); | 438 T** cell = reinterpret_cast<T**>(obj); |
439 if (*cell && !self->isAlive(*cell)) | 439 if (*cell && !self->isAlive(*cell)) |
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589 return visitor->isAlive(this); \ | 589 return visitor->isAlive(this); \ |
590 } \ | 590 } \ |
591 private: | 591 private: |
592 | 592 |
593 #if ENABLE(OILPAN) | 593 #if ENABLE(OILPAN) |
594 #define WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(TYPE) USING_GARBAGE_COLLECTED_MIXI
N(TYPE) | 594 #define WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(TYPE) USING_GARBAGE_COLLECTED_MIXI
N(TYPE) |
595 #else | 595 #else |
596 #define WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(TYPE) | 596 #define WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(TYPE) |
597 #endif | 597 #endif |
598 | 598 |
599 #if ENABLE(GC_TRACING) | 599 #if ENABLE(GC_PROFILING) |
600 template<typename T> | 600 template<typename T> |
601 struct TypenameStringTrait { | 601 struct TypenameStringTrait { |
602 static const String& get() | 602 static const String& get() |
603 { | 603 { |
604 DEFINE_STATIC_LOCAL(String, typenameString, (WTF::extractTypeNameFromFun
ctionName(WTF::extractNameFunction<T>()))); | 604 DEFINE_STATIC_LOCAL(String, typenameString, (WTF::extractTypeNameFromFun
ctionName(WTF::extractNameFunction<T>()))); |
605 return typenameString; | 605 return typenameString; |
606 } | 606 } |
607 }; | 607 }; |
608 #endif | 608 #endif |
609 | 609 |
610 template<typename T> | 610 template<typename T> |
611 struct GCInfoAtBase { | 611 struct GCInfoAtBase { |
612 static const GCInfo* get() | 612 static const GCInfo* get() |
613 { | 613 { |
614 static const GCInfo gcInfo = { | 614 static const GCInfo gcInfo = { |
615 TraceTrait<T>::trace, | 615 TraceTrait<T>::trace, |
616 FinalizerTrait<T>::finalize, | 616 FinalizerTrait<T>::finalize, |
617 FinalizerTrait<T>::nonTrivialFinalizer, | 617 FinalizerTrait<T>::nonTrivialFinalizer, |
618 WTF::IsPolymorphic<T>::value, | 618 WTF::IsPolymorphic<T>::value, |
619 #if ENABLE(GC_TRACING) | 619 #if ENABLE(GC_PROFILING) |
620 TypenameStringTrait<T>::get() | 620 TypenameStringTrait<T>::get() |
621 #endif | 621 #endif |
622 }; | 622 }; |
623 return &gcInfo; | 623 return &gcInfo; |
624 } | 624 } |
625 }; | 625 }; |
626 | 626 |
627 template<typename T> class GarbageCollected; | 627 template<typename T> class GarbageCollected; |
628 template<typename T, bool = WTF::IsSubclassOfTemplate<typename WTF::RemoveConst<
T>::Type, GarbageCollected>::value> struct GetGarbageCollectedBase; | 628 template<typename T, bool = WTF::IsSubclassOfTemplate<typename WTF::RemoveConst<
T>::Type, GarbageCollected>::value> struct GetGarbageCollectedBase; |
629 | 629 |
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641 struct GCInfoTrait { | 641 struct GCInfoTrait { |
642 static const GCInfo* get() | 642 static const GCInfo* get() |
643 { | 643 { |
644 return GCInfoAtBase<typename GetGarbageCollectedBase<T>::type>::get(); | 644 return GCInfoAtBase<typename GetGarbageCollectedBase<T>::type>::get(); |
645 } | 645 } |
646 }; | 646 }; |
647 | 647 |
648 } | 648 } |
649 | 649 |
650 #endif | 650 #endif |
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