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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 |
| (...skipping 25 matching lines...) Expand all Loading... |
| 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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