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Issue 9455088: Remove static initializers in v8. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Address Florian's comments. Created 8 years, 9 months ago
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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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716 FULL_INTERVAL 716 FULL_INTERVAL
717 }; 717 };
718 718
719 static const int kSignalSenderStackSize = 64 * KB; 719 static const int kSignalSenderStackSize = 64 * KB;
720 720
721 explicit SignalSender(int interval) 721 explicit SignalSender(int interval)
722 : Thread(Thread::Options("SignalSender", kSignalSenderStackSize)), 722 : Thread(Thread::Options("SignalSender", kSignalSenderStackSize)),
723 interval_(interval) {} 723 interval_(interval) {}
724 724
725 static void AddActiveSampler(Sampler* sampler) { 725 static void AddActiveSampler(Sampler* sampler) {
726 ScopedLock lock(mutex_); 726 ScopedLock lock(mutex_.Pointer());
727 SamplerRegistry::AddActiveSampler(sampler); 727 SamplerRegistry::AddActiveSampler(sampler);
728 if (instance_ == NULL) { 728 if (instance_ == NULL) {
729 // Install a signal handler. 729 // Install a signal handler.
730 struct sigaction sa; 730 struct sigaction sa;
731 sa.sa_sigaction = ProfilerSignalHandler; 731 sa.sa_sigaction = ProfilerSignalHandler;
732 sigemptyset(&sa.sa_mask); 732 sigemptyset(&sa.sa_mask);
733 sa.sa_flags = SA_RESTART | SA_SIGINFO; 733 sa.sa_flags = SA_RESTART | SA_SIGINFO;
734 signal_handler_installed_ = 734 signal_handler_installed_ =
735 (sigaction(SIGPROF, &sa, &old_signal_handler_) == 0); 735 (sigaction(SIGPROF, &sa, &old_signal_handler_) == 0);
736 736
737 // Start a thread that sends SIGPROF signal to VM threads. 737 // Start a thread that sends SIGPROF signal to VM threads.
738 instance_ = new SignalSender(sampler->interval()); 738 instance_ = new SignalSender(sampler->interval());
739 instance_->Start(); 739 instance_->Start();
740 } else { 740 } else {
741 ASSERT(instance_->interval_ == sampler->interval()); 741 ASSERT(instance_->interval_ == sampler->interval());
742 } 742 }
743 } 743 }
744 744
745 static void RemoveActiveSampler(Sampler* sampler) { 745 static void RemoveActiveSampler(Sampler* sampler) {
746 ScopedLock lock(mutex_); 746 ScopedLock lock(mutex_.Pointer());
747 SamplerRegistry::RemoveActiveSampler(sampler); 747 SamplerRegistry::RemoveActiveSampler(sampler);
748 if (SamplerRegistry::GetState() == SamplerRegistry::HAS_NO_SAMPLERS) { 748 if (SamplerRegistry::GetState() == SamplerRegistry::HAS_NO_SAMPLERS) {
749 RuntimeProfiler::StopRuntimeProfilerThreadBeforeShutdown(instance_); 749 RuntimeProfiler::StopRuntimeProfilerThreadBeforeShutdown(instance_);
750 delete instance_; 750 delete instance_;
751 instance_ = NULL; 751 instance_ = NULL;
752 752
753 // Restore the old signal handler. 753 // Restore the old signal handler.
754 if (signal_handler_installed_) { 754 if (signal_handler_installed_) {
755 sigaction(SIGPROF, &old_signal_handler_, 0); 755 sigaction(SIGPROF, &old_signal_handler_, 0);
756 signal_handler_installed_ = false; 756 signal_handler_installed_ = false;
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829 ASSERT(result == 0 || errno == EINTR); 829 ASSERT(result == 0 || errno == EINTR);
830 } 830 }
831 #endif 831 #endif
832 USE(result); 832 USE(result);
833 } 833 }
834 834
835 const int interval_; 835 const int interval_;
836 RuntimeProfilerRateLimiter rate_limiter_; 836 RuntimeProfilerRateLimiter rate_limiter_;
837 837
838 // Protects the process wide state below. 838 // Protects the process wide state below.
839 static Mutex* mutex_; 839 static LazyMutex mutex_;
840 static SignalSender* instance_; 840 static SignalSender* instance_;
841 static bool signal_handler_installed_; 841 static bool signal_handler_installed_;
842 static struct sigaction old_signal_handler_; 842 static struct sigaction old_signal_handler_;
843 843
844 private: 844 private:
845 DISALLOW_COPY_AND_ASSIGN(SignalSender); 845 DISALLOW_COPY_AND_ASSIGN(SignalSender);
846 }; 846 };
847 847
848 Mutex* SignalSender::mutex_ = OS::CreateMutex(); 848 LazyMutex SignalSender::mutex_ = LAZY_MUTEX_INITIALIZER;
849 SignalSender* SignalSender::instance_ = NULL; 849 SignalSender* SignalSender::instance_ = NULL;
850 struct sigaction SignalSender::old_signal_handler_; 850 struct sigaction SignalSender::old_signal_handler_;
851 bool SignalSender::signal_handler_installed_ = false; 851 bool SignalSender::signal_handler_installed_ = false;
852 852
853 853
854 Sampler::Sampler(Isolate* isolate, int interval) 854 Sampler::Sampler(Isolate* isolate, int interval)
855 : isolate_(isolate), 855 : isolate_(isolate),
856 interval_(interval), 856 interval_(interval),
857 profiling_(false), 857 profiling_(false),
858 active_(false), 858 active_(false),
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875 875
876 876
877 void Sampler::Stop() { 877 void Sampler::Stop() {
878 ASSERT(IsActive()); 878 ASSERT(IsActive());
879 SignalSender::RemoveActiveSampler(this); 879 SignalSender::RemoveActiveSampler(this);
880 SetActive(false); 880 SetActive(false);
881 } 881 }
882 882
883 883
884 } } // namespace v8::internal 884 } } // namespace v8::internal
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