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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 WTF_Allocator_h | 5 #ifndef WTF_Allocator_h |
| 6 #define WTF_Allocator_h | 6 #define WTF_Allocator_h |
| 7 | 7 |
| 8 #include "wtf/Assertions.h" | 8 #include "wtf/Assertions.h" |
| 9 #include "wtf/Partitions.h" | 9 #include "wtf/Partitions.h" |
| 10 #include "wtf/StdLibExtras.h" | 10 #include "wtf/StdLibExtras.h" |
| (...skipping 15 matching lines...) Expand all Loading... |
| 26 // DISALLOW_NEW(): Cannot be allocated with new operators but can be a | 26 // DISALLOW_NEW(): Cannot be allocated with new operators but can be a |
| 27 // part of object. If it has Members you need a trace method and the containing | 27 // part of object. If it has Members you need a trace method and the containing |
| 28 // object needs to call that trace method. | 28 // object needs to call that trace method. |
| 29 // | 29 // |
| 30 // DISALLOW_NEW_EXCEPT_PLACEMENT_NEW(): Allows only placement new operator. Thi
s | 30 // DISALLOW_NEW_EXCEPT_PLACEMENT_NEW(): Allows only placement new operator. Thi
s |
| 31 // disallows general allocation of this object but allows to put the object as a | 31 // disallows general allocation of this object but allows to put the object as a |
| 32 // value object in collections. If these have Members you need to have a trace | 32 // value object in collections. If these have Members you need to have a trace |
| 33 // method. That trace method will be called automatically by the on-heap | 33 // method. That trace method will be called automatically by the on-heap |
| 34 // collections. | 34 // collections. |
| 35 // | 35 // |
| 36 #define DISALLOW_NEW() \ | 36 #define DISALLOW_NEW() \ |
| 37 private: \ | 37 private: \ |
| 38 void* operator new(size_t) = delete; \ | 38 void* operator new(size_t) = delete; \ |
| 39 void* operator new(size_t, NotNullTag, void*) = delete; \ | 39 void* operator new(size_t, NotNullTag, void*) = delete; \ |
| 40 void* operator new(size_t, void*) = delete; \ | 40 void* operator new(size_t, void*) = delete; \ |
| 41 public: | 41 \ |
| 42 public: |
| 42 | 43 |
| 43 #define DISALLOW_NEW_EXCEPT_PLACEMENT_NEW()
\ | 44 #define DISALLOW_NEW_EXCEPT_PLACEMENT_NEW() \ |
| 44 public:
\ | 45 public: \ |
| 45 using IsAllowOnlyPlacementNew = int;
\ | 46 using IsAllowOnlyPlacementNew = int; \ |
| 46 void* operator new(size_t, NotNullTag, void* location) { return location
; } \ | 47 void* operator new(size_t, NotNullTag, void* location) { return location; } \ |
| 47 void* operator new(size_t, void* location) { return location; }
\ | 48 void* operator new(size_t, void* location) { return location; } \ |
| 48 private:
\ | 49 \ |
| 49 void* operator new(size_t) = delete;
\ | 50 private: \ |
| 50 public: | 51 void* operator new(size_t) = delete; \ |
| 52 \ |
| 53 public: |
| 51 | 54 |
| 52 #define STATIC_ONLY(Type) \ | 55 #define STATIC_ONLY(Type) \ |
| 53 private: \ | 56 private: \ |
| 54 Type() = delete; \ | 57 Type() = delete; \ |
| 55 Type(const Type&) = delete; \ | 58 Type(const Type&) = delete; \ |
| 56 Type& operator=(const Type&) = delete; \ | 59 Type& operator=(const Type&) = delete; \ |
| 57 void* operator new(size_t) = delete; \ | 60 void* operator new(size_t) = delete; \ |
| 58 void* operator new(size_t, NotNullTag, void*) = delete; \ | 61 void* operator new(size_t, NotNullTag, void*) = delete; \ |
| 59 void* operator new(size_t, void*) = delete; \ | 62 void* operator new(size_t, void*) = delete; \ |
| 60 public: | 63 \ |
| 64 public: |
| 61 | 65 |
| 62 #define IS_GARBAGE_COLLECTED_TYPE() \ | 66 #define IS_GARBAGE_COLLECTED_TYPE() \ |
| 63 public: \ | 67 public: \ |
| 64 using IsGarbageCollectedTypeMarker = int; \ | 68 using IsGarbageCollectedTypeMarker = int; \ |
| 65 private: | 69 \ |
| 70 private: |
| 66 | 71 |
| 67 #if COMPILER(CLANG) | 72 #if COMPILER(CLANG) |
| 68 #define STACK_ALLOCATED() \ | 73 #define STACK_ALLOCATED() \ |
| 69 private: \ | 74 private: \ |
| 70 __attribute__((annotate("blink_stack_allocated"))) \ | 75 __attribute__((annotate("blink_stack_allocated"))) void* operator new( \ |
| 71 void* operator new(size_t) = delete; \ | 76 size_t) = delete; \ |
| 72 void* operator new(size_t, NotNullTag, void*) = delete; \ | 77 void* operator new(size_t, NotNullTag, void*) = delete; \ |
| 73 void* operator new(size_t, void*) = delete; \ | 78 void* operator new(size_t, void*) = delete; \ |
| 74 public: | 79 \ |
| 80 public: |
| 75 #else | 81 #else |
| 76 #define STACK_ALLOCATED() DISALLOW_NEW() | 82 #define STACK_ALLOCATED() DISALLOW_NEW() |
| 77 #endif | 83 #endif |
| 78 | 84 |
| 79 // Provides customizable overrides of fastMalloc/fastFree and operator new/delet
e | 85 // Provides customizable overrides of fastMalloc/fastFree and operator new/delet
e |
| 80 // | 86 // |
| 81 // Provided functionality: | 87 // Provided functionality: |
| 82 // Macro: USING_FAST_MALLOC | 88 // Macro: USING_FAST_MALLOC |
| 83 // | 89 // |
| 84 // Example usage: | 90 // Example usage: |
| 85 // class Widget { | 91 // class Widget { |
| 86 // USING_FAST_MALLOC(Widget) | 92 // USING_FAST_MALLOC(Widget) |
| 87 // ... | 93 // ... |
| 88 // }; | 94 // }; |
| 89 // | 95 // |
| 90 // struct Data { | 96 // struct Data { |
| 91 // USING_FAST_MALLOC(Data) | 97 // USING_FAST_MALLOC(Data) |
| 92 // public: | 98 // public: |
| 93 // ... | 99 // ... |
| 94 // }; | 100 // }; |
| 95 // | 101 // |
| 96 | 102 |
| 97 #define USING_FAST_MALLOC_INTERNAL(type, typeName) \ | 103 #define USING_FAST_MALLOC_INTERNAL(type, typeName) \ |
| 98 public: \ | 104 public: \ |
| 99 void* operator new(size_t, void* p) { return p; } \ | 105 void* operator new(size_t, void* p) { return p; } \ |
| 100 void* operator new[](size_t, void* p) { return p; } \ | 106 void* operator new[](size_t, void* p) { return p; } \ |
| 101 \ | 107 \ |
| 102 void* operator new(size_t size) \ | 108 void* operator new(size_t size) { \ |
| 103 { \ | 109 return ::WTF::Partitions::fastMalloc(size, typeName); \ |
| 104 return ::WTF::Partitions::fastMalloc(size, typeName); \ | 110 } \ |
| 105 } \ | 111 \ |
| 106 \ | 112 void operator delete(void* p) { ::WTF::Partitions::fastFree(p); } \ |
| 107 void operator delete(void* p) \ | 113 \ |
| 108 { \ | 114 void* operator new[](size_t size) { \ |
| 109 ::WTF::Partitions::fastFree(p); \ | 115 return ::WTF::Partitions::fastMalloc(size, typeName); \ |
| 110 } \ | 116 } \ |
| 111 \ | 117 \ |
| 112 void* operator new[](size_t size) \ | 118 void operator delete[](void* p) { ::WTF::Partitions::fastFree(p); } \ |
| 113 { \ | 119 void* operator new(size_t, NotNullTag, void* location) { \ |
| 114 return ::WTF::Partitions::fastMalloc(size, typeName); \ | 120 ASSERT(location); \ |
| 115 } \ | 121 return location; \ |
| 116 \ | 122 } \ |
| 117 void operator delete[](void* p) \ | 123 static const char* classNameForAllocator() { return #type; } \ |
| 118 { \ | 124 \ |
| 119 ::WTF::Partitions::fastFree(p); \ | 125 private: \ |
| 120 } \ | 126 typedef int __thisIsHereToForceASemicolonAfterThisMacro |
| 121 void* operator new(size_t, NotNullTag, void* location) \ | |
| 122 { \ | |
| 123 ASSERT(location); \ | |
| 124 return location; \ | |
| 125 } \ | |
| 126 static const char* classNameForAllocator() \ | |
| 127 { \ | |
| 128 return #type; \ | |
| 129 } \ | |
| 130 private: \ | |
| 131 typedef int __thisIsHereToForceASemicolonAfterThisMacro | |
| 132 | 127 |
| 133 // Both of these macros enable fast malloc and provide type info to the heap | 128 // Both of these macros enable fast malloc and provide type info to the heap |
| 134 // profiler. The regular macro does not provide type info in official builds, | 129 // profiler. The regular macro does not provide type info in official builds, |
| 135 // to avoid bloating the binary with type name strings. The |WITH_TYPE_NAME| | 130 // to avoid bloating the binary with type name strings. The |WITH_TYPE_NAME| |
| 136 // variant provides type info unconditionally, so it should be used sparingly. | 131 // variant provides type info unconditionally, so it should be used sparingly. |
| 137 // Furthermore, the |WITH_TYPE_NAME| variant does not work if |type| is a | 132 // Furthermore, the |WITH_TYPE_NAME| variant does not work if |type| is a |
| 138 // template argument; |USING_FAST_MALLOC| does. | 133 // template argument; |USING_FAST_MALLOC| does. |
| 139 #define USING_FAST_MALLOC(type) USING_FAST_MALLOC_INTERNAL(type, WTF_HEAP_PROFIL
ER_TYPE_NAME(type)) | 134 #define USING_FAST_MALLOC(type) \ |
| 140 #define USING_FAST_MALLOC_WITH_TYPE_NAME(type) USING_FAST_MALLOC_INTERNAL(type,
#type) | 135 USING_FAST_MALLOC_INTERNAL(type, WTF_HEAP_PROFILER_TYPE_NAME(type)) |
| 136 #define USING_FAST_MALLOC_WITH_TYPE_NAME(type) \ |
| 137 USING_FAST_MALLOC_INTERNAL(type, #type) |
| 141 | 138 |
| 142 } // namespace WTF | 139 } // namespace WTF |
| 143 | 140 |
| 144 #endif /* WTF_Allocator_h */ | 141 #endif /* WTF_Allocator_h */ |
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