Build and pass all tests on FreeBSD.
Review URL: http://codereview.chromium.org/6726050 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7397 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
ager@chromium.org
parent
fb457a8b87
commit
3187ef6ce8
@ -75,6 +75,9 @@ double ceiling(double x) {
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}
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static Mutex* limit_mutex = NULL;
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void OS::Setup() {
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// Seed the random number generator.
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// Convert the current time to a 64-bit integer first, before converting it
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@ -83,6 +86,7 @@ void OS::Setup() {
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// call this setup code within the same millisecond.
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uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis());
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srandom(static_cast<unsigned int>(seed));
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limit_mutex = CreateMutex();
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}
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@ -131,6 +135,9 @@ static void* highest_ever_allocated = reinterpret_cast<void*>(0);
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static void UpdateAllocatedSpaceLimits(void* address, int size) {
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ASSERT(limit_mutex != NULL);
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ScopedLock lock(limit_mutex);
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lowest_ever_allocated = Min(lowest_ever_allocated, address);
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highest_ever_allocated =
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Max(highest_ever_allocated,
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@ -300,7 +307,7 @@ void OS::LogSharedLibraryAddresses() {
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// There may be no filename in this line. Skip to next.
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if (start_of_path == NULL) continue;
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buffer[bytes_read] = 0;
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LOG(SharedLibraryEvent(start_of_path, start, end));
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LOG(i::Isolate::Current(), SharedLibraryEvent(start_of_path, start, end));
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}
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close(fd);
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#endif
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@ -619,10 +626,6 @@ Semaphore* OS::CreateSemaphore(int count) {
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#ifdef ENABLE_LOGGING_AND_PROFILING
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static Sampler* active_sampler_ = NULL;
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static pthread_t vm_tid_ = NULL;
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static pthread_t GetThreadID() {
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pthread_t thread_id = pthread_self();
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return thread_id;
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@ -630,35 +633,161 @@ static pthread_t GetThreadID() {
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class Sampler::PlatformData : public Malloced {
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public:
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PlatformData() : vm_tid_(GetThreadID()) {}
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pthread_t vm_tid() const { return vm_tid_; }
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private:
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pthread_t vm_tid_;
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};
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static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
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USE(info);
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if (signal != SIGPROF) return;
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Isolate* isolate = Isolate::UncheckedCurrent();
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if (isolate == NULL || !isolate->IsInitialized() || !isolate->IsInUse()) {
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// We require a fully initialized and entered isolate.
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return;
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}
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Sampler* sampler = isolate->logger()->sampler();
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if (sampler == NULL || !sampler->IsActive()) return;
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TickSample sample_obj;
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TickSample* sample = CpuProfiler::TickSampleEvent(isolate);
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if (sample == NULL) sample = &sample_obj;
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// Extracting the sample from the context is extremely machine dependent.
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ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(context);
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mcontext_t& mcontext = ucontext->uc_mcontext;
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sample->state = isolate->current_vm_state();
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#if V8_HOST_ARCH_IA32
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sample->pc = reinterpret_cast<Address>(mcontext.mc_eip);
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sample->sp = reinterpret_cast<Address>(mcontext.mc_esp);
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sample->fp = reinterpret_cast<Address>(mcontext.mc_ebp);
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#elif V8_HOST_ARCH_X64
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sample->pc = reinterpret_cast<Address>(mcontext.mc_rip);
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sample->sp = reinterpret_cast<Address>(mcontext.mc_rsp);
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sample->fp = reinterpret_cast<Address>(mcontext.mc_rbp);
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#elif V8_HOST_ARCH_ARM
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sample->pc = reinterpret_cast<Address>(mcontext.mc_r15);
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sample->sp = reinterpret_cast<Address>(mcontext.mc_r13);
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sample->fp = reinterpret_cast<Address>(mcontext.mc_r11);
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#endif
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sampler->SampleStack(sample);
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sampler->Tick(sample);
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}
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class SignalSender : public Thread {
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public:
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enum SleepInterval {
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FULL_INTERVAL,
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HALF_INTERVAL
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HALF_INTERVAL,
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FULL_INTERVAL
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};
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explicit PlatformData(Sampler* sampler)
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: sampler_(sampler),
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signal_handler_installed_(false),
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signal_sender_launched_(false) {
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explicit SignalSender(int interval)
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: Thread(NULL, "SignalSender"),
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interval_(interval) {}
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static void AddActiveSampler(Sampler* sampler) {
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ScopedLock lock(mutex_);
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SamplerRegistry::AddActiveSampler(sampler);
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if (instance_ == NULL) {
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// Install a signal handler.
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struct sigaction sa;
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sa.sa_sigaction = ProfilerSignalHandler;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = SA_RESTART | SA_SIGINFO;
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signal_handler_installed_ =
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(sigaction(SIGPROF, &sa, &old_signal_handler_) == 0);
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// Start a thread that sends SIGPROF signal to VM threads.
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instance_ = new SignalSender(sampler->interval());
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instance_->Start();
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} else {
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ASSERT(instance_->interval_ == sampler->interval());
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}
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}
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void SignalSender() {
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while (sampler_->IsActive()) {
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if (rate_limiter_.SuspendIfNecessary()) continue;
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if (sampler_->IsProfiling() && RuntimeProfiler::IsEnabled()) {
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Sleep(FULL_INTERVAL);
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RuntimeProfiler::NotifyTick();
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static void RemoveActiveSampler(Sampler* sampler) {
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ScopedLock lock(mutex_);
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SamplerRegistry::RemoveActiveSampler(sampler);
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if (SamplerRegistry::GetState() == SamplerRegistry::HAS_NO_SAMPLERS) {
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RuntimeProfiler::WakeUpRuntimeProfilerThreadBeforeShutdown();
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instance_->Join();
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delete instance_;
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instance_ = NULL;
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// Restore the old signal handler.
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if (signal_handler_installed_) {
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sigaction(SIGPROF, &old_signal_handler_, 0);
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signal_handler_installed_ = false;
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}
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}
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}
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// Implement Thread::Run().
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virtual void Run() {
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SamplerRegistry::State state;
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while ((state = SamplerRegistry::GetState()) !=
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SamplerRegistry::HAS_NO_SAMPLERS) {
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bool cpu_profiling_enabled =
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(state == SamplerRegistry::HAS_CPU_PROFILING_SAMPLERS);
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bool runtime_profiler_enabled = RuntimeProfiler::IsEnabled();
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// When CPU profiling is enabled both JavaScript and C++ code is
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// profiled. We must not suspend.
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if (!cpu_profiling_enabled) {
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if (rate_limiter_.SuspendIfNecessary()) continue;
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}
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if (cpu_profiling_enabled && runtime_profiler_enabled) {
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if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile, this)) {
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return;
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}
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Sleep(HALF_INTERVAL);
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if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile, NULL)) {
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return;
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}
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Sleep(HALF_INTERVAL);
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} else {
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if (RuntimeProfiler::IsEnabled()) RuntimeProfiler::NotifyTick();
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if (cpu_profiling_enabled) {
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if (!SamplerRegistry::IterateActiveSamplers(&DoCpuProfile,
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this)) {
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return;
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}
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}
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if (runtime_profiler_enabled) {
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if (!SamplerRegistry::IterateActiveSamplers(&DoRuntimeProfile,
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NULL)) {
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return;
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}
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}
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Sleep(FULL_INTERVAL);
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}
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}
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}
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static void DoCpuProfile(Sampler* sampler, void* raw_sender) {
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if (!sampler->IsProfiling()) return;
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SignalSender* sender = reinterpret_cast<SignalSender*>(raw_sender);
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sender->SendProfilingSignal(sampler->platform_data()->vm_tid());
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}
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static void DoRuntimeProfile(Sampler* sampler, void* ignored) {
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if (!sampler->isolate()->IsInitialized()) return;
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sampler->isolate()->runtime_profiler()->NotifyTick();
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}
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void SendProfilingSignal(pthread_t tid) {
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if (!signal_handler_installed_) return;
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pthread_kill(tid, SIGPROF);
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}
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void Sleep(SleepInterval full_or_half) {
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// Convert ms to us and subtract 100 us to compensate delays
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// occuring during signal delivery.
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useconds_t interval = sampler_->interval_ * 1000 - 100;
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useconds_t interval = interval_ * 1000 - 100;
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if (full_or_half == HALF_INTERVAL) interval /= 2;
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int result = usleep(interval);
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#ifdef DEBUG
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@ -673,63 +802,22 @@ class Sampler::PlatformData : public Malloced {
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USE(result);
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}
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Sampler* sampler_;
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bool signal_handler_installed_;
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struct sigaction old_signal_handler_;
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struct itimerval old_timer_value_;
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bool signal_sender_launched_;
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pthread_t signal_sender_thread_;
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const int interval_;
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RuntimeProfilerRateLimiter rate_limiter_;
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// Protects the process wide state below.
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static Mutex* mutex_;
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static SignalSender* instance_;
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static bool signal_handler_installed_;
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static struct sigaction old_signal_handler_;
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DISALLOW_COPY_AND_ASSIGN(SignalSender);
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};
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static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
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USE(info);
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if (signal != SIGPROF) return;
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if (active_sampler_ == NULL) return;
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if (!active_sampler_->IsActive()) {
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// Restore old signal handler
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Sampler::PlatformData* data = active_sampler_->data();
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if (data->signal_handler_installed_) {
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sigaction(SIGPROF, &data->old_signal_handler_, 0);
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data->signal_handler_installed_ = false;
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}
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return;
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}
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if (vm_tid_ != GetThreadID()) return;
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TickSample sample_obj;
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TickSample* sample = CpuProfiler::TickSampleEvent();
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if (sample == NULL) sample = &sample_obj;
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// Extracting the sample from the context is extremely machine dependent.
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ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(context);
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mcontext_t& mcontext = ucontext->uc_mcontext;
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#if V8_HOST_ARCH_IA32
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sample->pc = reinterpret_cast<Address>(mcontext.mc_eip);
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sample->sp = reinterpret_cast<Address>(mcontext.mc_esp);
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sample->fp = reinterpret_cast<Address>(mcontext.mc_ebp);
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#elif V8_HOST_ARCH_X64
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sample->pc = reinterpret_cast<Address>(mcontext.mc_rip);
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sample->sp = reinterpret_cast<Address>(mcontext.mc_rsp);
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sample->fp = reinterpret_cast<Address>(mcontext.mc_rbp);
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#elif V8_HOST_ARCH_ARM
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sample->pc = reinterpret_cast<Address>(mcontext.mc_r15);
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sample->sp = reinterpret_cast<Address>(mcontext.mc_r13);
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sample->fp = reinterpret_cast<Address>(mcontext.mc_r11);
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#endif
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active_sampler_->SampleStack(sample);
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active_sampler_->Tick(sample);
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}
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static void* SenderEntry(void* arg) {
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Sampler::PlatformData* data =
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reinterpret_cast<Sampler::PlatformData*>(arg);
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data->SignalSender();
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return 0;
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}
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Mutex* SignalSender::mutex_ = OS::CreateMutex();
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SignalSender* SignalSender::instance_ = NULL;
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struct sigaction SignalSender::old_signal_handler_;
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bool SignalSender::signal_handler_installed_ = false;
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Sampler::Sampler(Isolate* isolate, int interval)
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@ -738,62 +826,27 @@ Sampler::Sampler(Isolate* isolate, int interval)
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profiling_(false),
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active_(false),
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samples_taken_(0) {
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data_ = new PlatformData(this);
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data_ = new PlatformData;
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}
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Sampler::~Sampler() {
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ASSERT(!IsActive());
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delete data_;
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}
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void Sampler::Start() {
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// There can only be one active sampler at the time on POSIX
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// platforms.
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ASSERT(!IsActive());
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vm_tid_ = GetThreadID();
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// Request profiling signals.
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struct sigaction sa;
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sa.sa_sigaction = ProfilerSignalHandler;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = SA_SIGINFO;
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if (sigaction(SIGPROF, &sa, &data_->old_signal_handler_) != 0) return;
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data_->signal_handler_installed_ = true;
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// Set the itimer to generate a tick for each interval.
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itimerval itimer;
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itimer.it_interval.tv_sec = interval_ / 1000;
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itimer.it_interval.tv_usec = (interval_ % 1000) * 1000;
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itimer.it_value.tv_sec = itimer.it_interval.tv_sec;
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itimer.it_value.tv_usec = itimer.it_interval.tv_usec;
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setitimer(ITIMER_PROF, &itimer, &data_->old_timer_value_);
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// Set this sampler as the active sampler.
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active_sampler_ = this;
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SetActive(true);
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// There's no way to send a signal to a thread on FreeBSD, but we can
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// start a thread that uses the stack guard to interrupt the JS thread.
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if (pthread_create(
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&data_->signal_sender_thread_, NULL, SenderEntry, data_) == 0) {
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data_->signal_sender_launched_ = true;
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}
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SignalSender::AddActiveSampler(this);
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}
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void Sampler::Stop() {
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// This sampler is no longer the active sampler.
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active_sampler_ = NULL;
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ASSERT(IsActive());
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SignalSender::RemoveActiveSampler(this);
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SetActive(false);
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// Wait for signal sender termination (it will exit after setting
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// active_ to false).
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if (data_->signal_sender_launched_) {
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Top::WakeUpRuntimeProfilerThreadBeforeShutdown();
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pthread_join(data_->signal_sender_thread_, NULL);
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data_->signal_sender_launched_ = false;
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}
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}
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#endif // ENABLE_LOGGING_AND_PROFILING
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