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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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103 | 103 |
104 INLINE(void UpdateCodeMap(CodeMap* code_map)); | 104 INLINE(void UpdateCodeMap(CodeMap* code_map)); |
105 }; | 105 }; |
106 | 106 |
107 | 107 |
108 class TickSampleEventRecord { | 108 class TickSampleEventRecord { |
109 public: | 109 public: |
110 // The parameterless constructor is used when we dequeue data from | 110 // The parameterless constructor is used when we dequeue data from |
111 // the ticks buffer. | 111 // the ticks buffer. |
112 TickSampleEventRecord() { } | 112 TickSampleEventRecord() { } |
113 explicit TickSampleEventRecord(unsigned order) | 113 explicit TickSampleEventRecord(unsigned order) : order(order) { } |
114 : filler(1), | |
115 order(order) { | |
116 ASSERT(filler != SamplingCircularQueue::kClear); | |
117 } | |
118 | 114 |
119 // The first machine word of a TickSampleEventRecord must not ever | |
120 // become equal to SamplingCircularQueue::kClear. As both order and | |
121 // TickSample's first field are not reliable in this sense (order | |
122 // can overflow, TickSample can have all fields reset), we are | |
123 // forced to use an artificial filler field. | |
124 int filler; | |
125 unsigned order; | 115 unsigned order; |
126 TickSample sample; | 116 TickSample sample; |
127 | 117 |
128 static TickSampleEventRecord* cast(void* value) { | 118 static TickSampleEventRecord* cast(void* value) { |
129 return reinterpret_cast<TickSampleEventRecord*>(value); | 119 return reinterpret_cast<TickSampleEventRecord*>(value); |
130 } | 120 } |
131 }; | 121 }; |
132 | 122 |
133 | 123 |
134 class CodeEventsContainer { | 124 class CodeEventsContainer { |
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269 bool is_profiling_; | 259 bool is_profiling_; |
270 | 260 |
271 private: | 261 private: |
272 DISALLOW_COPY_AND_ASSIGN(CpuProfiler); | 262 DISALLOW_COPY_AND_ASSIGN(CpuProfiler); |
273 }; | 263 }; |
274 | 264 |
275 } } // namespace v8::internal | 265 } } // namespace v8::internal |
276 | 266 |
277 | 267 |
278 #endif // V8_CPU_PROFILER_H_ | 268 #endif // V8_CPU_PROFILER_H_ |
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