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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium 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 GCInfo_h | 5 #ifndef GCInfo_h |
6 #define GCInfo_h | 6 #define GCInfo_h |
7 | 7 |
8 #include "platform/heap/Visitor.h" | 8 #include "platform/heap/Visitor.h" |
9 #include "wtf/Assertions.h" | 9 #include "wtf/Assertions.h" |
10 #include "wtf/Atomics.h" | 10 #include "wtf/Atomics.h" |
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110 // the garbage collector determines that the object is no longer | 110 // the garbage collector determines that the object is no longer |
111 // reachable. There is a GCInfo struct for each class that directly | 111 // reachable. There is a GCInfo struct for each class that directly |
112 // inherits from GarbageCollected or GarbageCollectedFinalized. | 112 // inherits from GarbageCollected or GarbageCollectedFinalized. |
113 struct GCInfo { | 113 struct GCInfo { |
114 bool hasFinalizer() const { return m_nonTrivialFinalizer; } | 114 bool hasFinalizer() const { return m_nonTrivialFinalizer; } |
115 bool hasVTable() const { return m_hasVTable; } | 115 bool hasVTable() const { return m_hasVTable; } |
116 TraceCallback m_trace; | 116 TraceCallback m_trace; |
117 FinalizationCallback m_finalize; | 117 FinalizationCallback m_finalize; |
118 bool m_nonTrivialFinalizer; | 118 bool m_nonTrivialFinalizer; |
119 bool m_hasVTable; | 119 bool m_hasVTable; |
120 #if ENABLE(GC_PROFILING) | |
121 // |m_className| is held as a reference to prevent dtor being called at exit
. | 120 // |m_className| is held as a reference to prevent dtor being called at exit
. |
122 const String& m_className; | 121 const String& m_className; |
123 #endif | |
124 }; | 122 }; |
125 | 123 |
126 #if ENABLE(ASSERT) | 124 #if ENABLE(ASSERT) |
127 PLATFORM_EXPORT void assertObjectHasGCInfo(const void*, size_t gcInfoIndex); | 125 PLATFORM_EXPORT void assertObjectHasGCInfo(const void*, size_t gcInfoIndex); |
128 #endif | 126 #endif |
129 | 127 |
130 class GCInfoTable { | 128 class GCInfoTable { |
131 public: | 129 public: |
132 PLATFORM_EXPORT static void ensureGCInfoIndex(const GCInfo*, size_t*); | 130 PLATFORM_EXPORT static void ensureGCInfoIndex(const GCInfo*, size_t*); |
133 | 131 |
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163 template<typename T> | 161 template<typename T> |
164 struct GCInfoAtBase { | 162 struct GCInfoAtBase { |
165 static size_t index() | 163 static size_t index() |
166 { | 164 { |
167 static_assert(sizeof(T), "T must be fully defined"); | 165 static_assert(sizeof(T), "T must be fully defined"); |
168 static const GCInfo gcInfo = { | 166 static const GCInfo gcInfo = { |
169 TraceTrait<T>::trace, | 167 TraceTrait<T>::trace, |
170 FinalizerTrait<T>::finalize, | 168 FinalizerTrait<T>::finalize, |
171 FinalizerTrait<T>::nonTrivialFinalizer, | 169 FinalizerTrait<T>::nonTrivialFinalizer, |
172 WTF::IsPolymorphic<T>::value, | 170 WTF::IsPolymorphic<T>::value, |
173 #if ENABLE(GC_PROFILING) | |
174 TypenameStringTrait<T>::get() | 171 TypenameStringTrait<T>::get() |
175 #endif | |
176 }; | 172 }; |
177 RETURN_GCINFO_INDEX(); | 173 RETURN_GCINFO_INDEX(); |
178 } | 174 } |
179 }; | 175 }; |
180 | 176 |
181 template<typename T, bool = WTF::IsSubclassOfTemplate<typename WTF::RemoveConst<
T>::Type, GarbageCollected>::value> struct GetGarbageCollectedBase; | 177 template<typename T, bool = WTF::IsSubclassOfTemplate<typename WTF::RemoveConst<
T>::Type, GarbageCollected>::value> struct GetGarbageCollectedBase; |
182 | 178 |
183 template<typename T> | 179 template<typename T> |
184 struct GetGarbageCollectedBase<T, true> { | 180 struct GetGarbageCollectedBase<T, true> { |
185 typedef typename T::GarbageCollectedBase type; | 181 typedef typename T::GarbageCollectedBase type; |
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219 template<typename T, size_t inlineCapacity> | 215 template<typename T, size_t inlineCapacity> |
220 struct GCInfoTrait<HeapVector<T, inlineCapacity>> : public GCInfoTrait<Vector<T,
inlineCapacity, HeapAllocator>> { }; | 216 struct GCInfoTrait<HeapVector<T, inlineCapacity>> : public GCInfoTrait<Vector<T,
inlineCapacity, HeapAllocator>> { }; |
221 template<typename T, size_t inlineCapacity> | 217 template<typename T, size_t inlineCapacity> |
222 struct GCInfoTrait<HeapDeque<T, inlineCapacity>> : public GCInfoTrait<Deque<T, i
nlineCapacity, HeapAllocator>> { }; | 218 struct GCInfoTrait<HeapDeque<T, inlineCapacity>> : public GCInfoTrait<Deque<T, i
nlineCapacity, HeapAllocator>> { }; |
223 template<typename T, typename U, typename V> | 219 template<typename T, typename U, typename V> |
224 struct GCInfoTrait<HeapHashCountedSet<T, U, V>> : public GCInfoTrait<HashCounted
Set<T, U, V, HeapAllocator>> { }; | 220 struct GCInfoTrait<HeapHashCountedSet<T, U, V>> : public GCInfoTrait<HashCounted
Set<T, U, V, HeapAllocator>> { }; |
225 | 221 |
226 } // namespace blink | 222 } // namespace blink |
227 | 223 |
228 #endif | 224 #endif |
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