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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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136 | 136 |
137 double ceiling(double x) { | 137 double ceiling(double x) { |
138 return ceil(x); | 138 return ceil(x); |
139 } | 139 } |
140 | 140 |
141 | 141 |
142 static Mutex* limit_mutex = NULL; | 142 static Mutex* limit_mutex = NULL; |
143 | 143 |
144 #if defined(V8_TARGET_ARCH_IA32) | 144 #if defined(V8_TARGET_ARCH_IA32) |
145 static OS::MemCopyFunction memcopy_function = NULL; | 145 static OS::MemCopyFunction memcopy_function = NULL; |
146 static Mutex* memcopy_function_mutex = OS::CreateMutex(); | 146 static LazyMutex memcopy_function_mutex = LAZY_MUTEX_INITIALIZER; |
147 // Defined in codegen-ia32.cc. | 147 // Defined in codegen-ia32.cc. |
148 OS::MemCopyFunction CreateMemCopyFunction(); | 148 OS::MemCopyFunction CreateMemCopyFunction(); |
149 | 149 |
150 // Copy memory area to disjoint memory area. | 150 // Copy memory area to disjoint memory area. |
151 void OS::MemCopy(void* dest, const void* src, size_t size) { | 151 void OS::MemCopy(void* dest, const void* src, size_t size) { |
152 if (memcopy_function == NULL) { | 152 if (memcopy_function == NULL) { |
153 ScopedLock lock(memcopy_function_mutex); | 153 ScopedLock lock(memcopy_function_mutex.Pointer()); |
154 if (memcopy_function == NULL) { | 154 if (memcopy_function == NULL) { |
155 OS::MemCopyFunction temp = CreateMemCopyFunction(); | 155 OS::MemCopyFunction temp = CreateMemCopyFunction(); |
156 MemoryBarrier(); | 156 MemoryBarrier(); |
157 memcopy_function = temp; | 157 memcopy_function = temp; |
158 } | 158 } |
159 } | 159 } |
160 // Note: here we rely on dependent reads being ordered. This is true | 160 // Note: here we rely on dependent reads being ordered. This is true |
161 // on all architectures we currently support. | 161 // on all architectures we currently support. |
162 (*memcopy_function)(dest, src, size); | 162 (*memcopy_function)(dest, src, size); |
163 #ifdef DEBUG | 163 #ifdef DEBUG |
164 CHECK_EQ(0, memcmp(dest, src, size)); | 164 CHECK_EQ(0, memcmp(dest, src, size)); |
165 #endif | 165 #endif |
166 } | 166 } |
167 #endif // V8_TARGET_ARCH_IA32 | 167 #endif // V8_TARGET_ARCH_IA32 |
168 | 168 |
169 #ifdef _WIN64 | 169 #ifdef _WIN64 |
170 typedef double (*ModuloFunction)(double, double); | 170 typedef double (*ModuloFunction)(double, double); |
171 static ModuloFunction modulo_function = NULL; | 171 static ModuloFunction modulo_function = NULL; |
172 static Mutex* modulo_function_mutex = OS::CreateMutex(); | 172 static LazyMutex modulo_function_mutex = LAZY_MUTEX_INITIALIZER; |
173 // Defined in codegen-x64.cc. | 173 // Defined in codegen-x64.cc. |
174 ModuloFunction CreateModuloFunction(); | 174 ModuloFunction CreateModuloFunction(); |
175 | 175 |
176 double modulo(double x, double y) { | 176 double modulo(double x, double y) { |
177 if (modulo_function == NULL) { | 177 if (modulo_function == NULL) { |
178 ScopedLock lock(modulo_function_mutex); | 178 ScopedLock lock(modulo_function_mutex.Pointer()); |
179 if (modulo_function == NULL) { | 179 if (modulo_function == NULL) { |
180 ModuloFunction temp = CreateModuloFunction(); | 180 ModuloFunction temp = CreateModuloFunction(); |
181 MemoryBarrier(); | 181 MemoryBarrier(); |
182 modulo_function = temp; | 182 modulo_function = temp; |
183 } | 183 } |
184 } | 184 } |
185 // Note: here we rely on dependent reads being ordered. This is true | 185 // Note: here we rely on dependent reads being ordered. This is true |
186 // on all architectures we currently support. | 186 // on all architectures we currently support. |
187 return (*modulo_function)(x, y); | 187 return (*modulo_function)(x, y); |
188 } | 188 } |
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2026 sampler->SampleStack(sample); | 2026 sampler->SampleStack(sample); |
2027 sampler->Tick(sample); | 2027 sampler->Tick(sample); |
2028 } | 2028 } |
2029 ResumeThread(profiled_thread); | 2029 ResumeThread(profiled_thread); |
2030 } | 2030 } |
2031 | 2031 |
2032 const int interval_; | 2032 const int interval_; |
2033 RuntimeProfilerRateLimiter rate_limiter_; | 2033 RuntimeProfilerRateLimiter rate_limiter_; |
2034 | 2034 |
2035 // Protects the process wide state below. | 2035 // Protects the process wide state below. |
2036 static Mutex* mutex_; | 2036 static LazyMutex mutex_; |
2037 static SamplerThread* instance_; | 2037 static SamplerThread* instance_; |
2038 | 2038 |
2039 private: | 2039 private: |
2040 DISALLOW_COPY_AND_ASSIGN(SamplerThread); | 2040 DISALLOW_COPY_AND_ASSIGN(SamplerThread); |
2041 }; | 2041 }; |
2042 | 2042 |
2043 | 2043 |
2044 Mutex* SamplerThread::mutex_ = OS::CreateMutex(); | 2044 LazyMutex SamplerThread::mutex_ = LAZY_MUTEX_INITIALIZER; |
2045 SamplerThread* SamplerThread::instance_ = NULL; | 2045 SamplerThread* SamplerThread::instance_ = NULL; |
2046 | 2046 |
2047 | 2047 |
2048 Sampler::Sampler(Isolate* isolate, int interval) | 2048 Sampler::Sampler(Isolate* isolate, int interval) |
2049 : isolate_(isolate), | 2049 : isolate_(isolate), |
2050 interval_(interval), | 2050 interval_(interval), |
2051 profiling_(false), | 2051 profiling_(false), |
2052 active_(false), | 2052 active_(false), |
2053 samples_taken_(0) { | 2053 samples_taken_(0) { |
2054 data_ = new PlatformData; | 2054 data_ = new PlatformData; |
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2069 | 2069 |
2070 | 2070 |
2071 void Sampler::Stop() { | 2071 void Sampler::Stop() { |
2072 ASSERT(IsActive()); | 2072 ASSERT(IsActive()); |
2073 SamplerThread::RemoveActiveSampler(this); | 2073 SamplerThread::RemoveActiveSampler(this); |
2074 SetActive(false); | 2074 SetActive(false); |
2075 } | 2075 } |
2076 | 2076 |
2077 | 2077 |
2078 } } // namespace v8::internal | 2078 } } // namespace v8::internal |
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