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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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398 | 398 |
399 // Macro to declare methods needed for each typed heap. | 399 // Macro to declare methods needed for each typed heap. |
400 #define DECLARE_VISITOR_METHODS(Type) \ | 400 #define DECLARE_VISITOR_METHODS(Type) \ |
401 DEBUG_ONLY(void checkGCInfo(const Type*, const GCInfo*);) \ | 401 DEBUG_ONLY(void checkGCInfo(const Type*, const GCInfo*);) \ |
402 virtual void mark(const Type*, TraceCallback) = 0; \ | 402 virtual void mark(const Type*, TraceCallback) = 0; \ |
403 virtual bool isMarked(const Type*) = 0; | 403 virtual bool isMarked(const Type*) = 0; |
404 | 404 |
405 FOR_EACH_TYPED_HEAP(DECLARE_VISITOR_METHODS) | 405 FOR_EACH_TYPED_HEAP(DECLARE_VISITOR_METHODS) |
406 #undef DECLARE_VISITOR_METHODS | 406 #undef DECLARE_VISITOR_METHODS |
407 | 407 |
408 #if ENABLE(GC_TRACING) | 408 #if ENABLE(GC_PROFILE_MARKING) |
409 void setHostInfo(void* object, const String& name) | 409 void setHostInfo(void* object, const String& name) |
410 { | 410 { |
411 m_hostObject = object; | 411 m_hostObject = object; |
412 m_hostName = name; | 412 m_hostName = name; |
413 } | 413 } |
414 #endif | 414 #endif |
415 | 415 |
416 protected: | 416 protected: |
417 virtual void registerWeakCell(void**, WeakPointerCallback) = 0; | 417 virtual void registerWeakCell(void**, WeakPointerCallback) = 0; |
418 #if ENABLE(GC_TRACING) | 418 #if ENABLE(GC_PROFILE_MARKING) |
419 void* m_hostObject; | 419 void* m_hostObject; |
420 String m_hostName; | 420 String m_hostName; |
421 #endif | 421 #endif |
422 | 422 |
423 private: | 423 private: |
424 template<typename T> | 424 template<typename T> |
425 static void handleWeakCell(Visitor* self, void* obj) | 425 static void handleWeakCell(Visitor* self, void* obj) |
426 { | 426 { |
427 T** cell = reinterpret_cast<T**>(obj); | 427 T** cell = reinterpret_cast<T**>(obj); |
428 if (*cell && !self->isAlive(*cell)) | 428 if (*cell && !self->isAlive(*cell)) |
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578 return visitor->isAlive(this); \ | 578 return visitor->isAlive(this); \ |
579 } \ | 579 } \ |
580 private: | 580 private: |
581 | 581 |
582 #if ENABLE(OILPAN) | 582 #if ENABLE(OILPAN) |
583 #define WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(TYPE) USING_GARBAGE_COLLECTED_MIXI
N(TYPE) | 583 #define WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(TYPE) USING_GARBAGE_COLLECTED_MIXI
N(TYPE) |
584 #else | 584 #else |
585 #define WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(TYPE) | 585 #define WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(TYPE) |
586 #endif | 586 #endif |
587 | 587 |
588 #if ENABLE(GC_TRACING) | 588 #if ENABLE(GC_PROFILING) |
589 template<typename T> | 589 template<typename T> |
590 struct TypenameStringTrait { | 590 struct TypenameStringTrait { |
591 static const String& get() | 591 static const String& get() |
592 { | 592 { |
593 DEFINE_STATIC_LOCAL(String, typenameString, (WTF::extractTypeNameFromFun
ctionName(WTF::extractNameFunction<T>()))); | 593 DEFINE_STATIC_LOCAL(String, typenameString, (WTF::extractTypeNameFromFun
ctionName(WTF::extractNameFunction<T>()))); |
594 return typenameString; | 594 return typenameString; |
595 } | 595 } |
596 }; | 596 }; |
597 #endif | 597 #endif |
598 | 598 |
599 template<typename T> | 599 template<typename T> |
600 struct GCInfoAtBase { | 600 struct GCInfoAtBase { |
601 static const GCInfo* get() | 601 static const GCInfo* get() |
602 { | 602 { |
603 static const GCInfo gcInfo = { | 603 static const GCInfo gcInfo = { |
604 TraceTrait<T>::trace, | 604 TraceTrait<T>::trace, |
605 FinalizerTrait<T>::finalize, | 605 FinalizerTrait<T>::finalize, |
606 FinalizerTrait<T>::nonTrivialFinalizer, | 606 FinalizerTrait<T>::nonTrivialFinalizer, |
607 WTF::IsPolymorphic<T>::value, | 607 WTF::IsPolymorphic<T>::value, |
608 #if ENABLE(GC_TRACING) | 608 #if ENABLE(GC_PROFILING) |
609 TypenameStringTrait<T>::get() | 609 TypenameStringTrait<T>::get() |
610 #endif | 610 #endif |
611 }; | 611 }; |
612 return &gcInfo; | 612 return &gcInfo; |
613 } | 613 } |
614 }; | 614 }; |
615 | 615 |
616 template<typename T> class GarbageCollected; | 616 template<typename T> class GarbageCollected; |
617 template<typename T, bool = WTF::IsSubclassOfTemplate<typename WTF::RemoveConst<
T>::Type, GarbageCollected>::value> struct GetGarbageCollectedBase; | 617 template<typename T, bool = WTF::IsSubclassOfTemplate<typename WTF::RemoveConst<
T>::Type, GarbageCollected>::value> struct GetGarbageCollectedBase; |
618 | 618 |
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630 struct GCInfoTrait { | 630 struct GCInfoTrait { |
631 static const GCInfo* get() | 631 static const GCInfo* get() |
632 { | 632 { |
633 return GCInfoAtBase<typename GetGarbageCollectedBase<T>::type>::get(); | 633 return GCInfoAtBase<typename GetGarbageCollectedBase<T>::type>::get(); |
634 } | 634 } |
635 }; | 635 }; |
636 | 636 |
637 } | 637 } |
638 | 638 |
639 #endif | 639 #endif |
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