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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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1187 instance_->StartSynchronously(); | 1187 instance_->StartSynchronously(); |
1188 } else { | 1188 } else { |
1189 ASSERT(instance_->interval_ == sampler->interval()); | 1189 ASSERT(instance_->interval_ == sampler->interval()); |
1190 } | 1190 } |
1191 } | 1191 } |
1192 | 1192 |
1193 static void RemoveActiveSampler(Sampler* sampler) { | 1193 static void RemoveActiveSampler(Sampler* sampler) { |
1194 ScopedLock lock(mutex_); | 1194 ScopedLock lock(mutex_); |
1195 SamplerRegistry::RemoveActiveSampler(sampler); | 1195 SamplerRegistry::RemoveActiveSampler(sampler); |
1196 if (SamplerRegistry::GetState() == SamplerRegistry::HAS_NO_SAMPLERS) { | 1196 if (SamplerRegistry::GetState() == SamplerRegistry::HAS_NO_SAMPLERS) { |
1197 RuntimeProfiler::StopRuntimeProfilerThreadBeforeShutdown(instance_); | 1197 instance_->Join(); |
1198 delete instance_; | 1198 delete instance_; |
1199 instance_ = NULL; | 1199 instance_ = NULL; |
1200 RestoreSignalHandler(); | 1200 RestoreSignalHandler(); |
1201 } | 1201 } |
1202 } | 1202 } |
1203 | 1203 |
1204 // Implement Thread::Run(). | 1204 // Implement Thread::Run(). |
1205 virtual void Run() { | 1205 virtual void Run() { |
1206 SamplerRegistry::State state; | 1206 SamplerRegistry::State state; |
1207 while ((state = SamplerRegistry::GetState()) != | 1207 while ((state = SamplerRegistry::GetState()) != |
1208 SamplerRegistry::HAS_NO_SAMPLERS) { | 1208 SamplerRegistry::HAS_NO_SAMPLERS) { |
1209 // When CPU profiling is enabled both JavaScript and C++ code is | 1209 // When CPU profiling is enabled both JavaScript and C++ code is |
1210 // profiled. We must not suspend. | 1210 // profiled. We must not suspend. |
1211 if (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS) { | 1211 if (state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS) { |
1212 if (!signal_handler_installed_) InstallSignalHandler(); | 1212 if (!signal_handler_installed_) InstallSignalHandler(); |
1213 SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this); | 1213 SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this); |
1214 } else { | 1214 } else { |
1215 if (signal_handler_installed_) RestoreSignalHandler(); | 1215 if (signal_handler_installed_) RestoreSignalHandler(); |
1216 if (RuntimeProfiler::WaitForSomeIsolateToEnterJS()) continue; | |
1217 } | 1216 } |
1218 Sleep(); // TODO(svenpanne) Figure out if OS:Sleep(interval_) is enough. | 1217 Sleep(); // TODO(svenpanne) Figure out if OS:Sleep(interval_) is enough. |
1219 } | 1218 } |
1220 } | 1219 } |
1221 | 1220 |
1222 static void DoCpuProfile(Sampler* sampler, void* raw_sender) { | 1221 static void DoCpuProfile(Sampler* sampler, void* raw_sender) { |
1223 if (!sampler->IsProfiling()) return; | 1222 if (!sampler->IsProfiling()) return; |
1224 SignalSender* sender = reinterpret_cast<SignalSender*>(raw_sender); | 1223 SignalSender* sender = reinterpret_cast<SignalSender*>(raw_sender); |
1225 sender->SendProfilingSignal(sampler->platform_data()->vm_tid()); | 1224 sender->SendProfilingSignal(sampler->platform_data()->vm_tid()); |
1226 } | 1225 } |
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1336 | 1335 |
1337 | 1336 |
1338 void Sampler::Stop() { | 1337 void Sampler::Stop() { |
1339 ASSERT(IsActive()); | 1338 ASSERT(IsActive()); |
1340 SignalSender::RemoveActiveSampler(this); | 1339 SignalSender::RemoveActiveSampler(this); |
1341 SetActive(false); | 1340 SetActive(false); |
1342 } | 1341 } |
1343 | 1342 |
1344 | 1343 |
1345 } } // namespace v8::internal | 1344 } } // namespace v8::internal |
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