| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/profiler/cpu-profiler.h" |
| |
| #include "src/debug/debug.h" |
| #include "src/deoptimizer.h" |
| #include "src/frames-inl.h" |
| #include "src/locked-queue-inl.h" |
| #include "src/log-inl.h" |
| #include "src/profiler/cpu-profiler-inl.h" |
| #include "src/vm-state-inl.h" |
| |
| #include "include/v8-profiler.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| static const int kProfilerStackSize = 64 * KB; |
| |
| |
| ProfilerEventsProcessor::ProfilerEventsProcessor(ProfileGenerator* generator, |
| Sampler* sampler, |
| base::TimeDelta period) |
| : Thread(Thread::Options("v8:ProfEvntProc", kProfilerStackSize)), |
| generator_(generator), |
| sampler_(sampler), |
| running_(1), |
| period_(period), |
| last_code_event_id_(0), |
| last_processed_code_event_id_(0) {} |
| |
| |
| ProfilerEventsProcessor::~ProfilerEventsProcessor() {} |
| |
| |
| void ProfilerEventsProcessor::Enqueue(const CodeEventsContainer& event) { |
| event.generic.order = last_code_event_id_.Increment(1); |
| events_buffer_.Enqueue(event); |
| } |
| |
| |
| void ProfilerEventsProcessor::AddDeoptStack(Isolate* isolate, Address from, |
| int fp_to_sp_delta) { |
| TickSampleEventRecord record(last_code_event_id_.Value()); |
| RegisterState regs; |
| Address fp = isolate->c_entry_fp(isolate->thread_local_top()); |
| regs.sp = fp - fp_to_sp_delta; |
| regs.fp = fp; |
| regs.pc = from; |
| record.sample.Init(isolate, regs, TickSample::kSkipCEntryFrame); |
| ticks_from_vm_buffer_.Enqueue(record); |
| } |
| |
| |
| void ProfilerEventsProcessor::AddCurrentStack(Isolate* isolate) { |
| TickSampleEventRecord record(last_code_event_id_.Value()); |
| RegisterState regs; |
| StackFrameIterator it(isolate); |
| if (!it.done()) { |
| StackFrame* frame = it.frame(); |
| regs.sp = frame->sp(); |
| regs.fp = frame->fp(); |
| regs.pc = frame->pc(); |
| } |
| record.sample.Init(isolate, regs, TickSample::kSkipCEntryFrame); |
| ticks_from_vm_buffer_.Enqueue(record); |
| } |
| |
| |
| void ProfilerEventsProcessor::StopSynchronously() { |
| if (!base::NoBarrier_AtomicExchange(&running_, 0)) return; |
| Join(); |
| } |
| |
| |
| bool ProfilerEventsProcessor::ProcessCodeEvent() { |
| CodeEventsContainer record; |
| if (events_buffer_.Dequeue(&record)) { |
| switch (record.generic.type) { |
| #define PROFILER_TYPE_CASE(type, clss) \ |
| case CodeEventRecord::type: \ |
| record.clss##_.UpdateCodeMap(generator_->code_map()); \ |
| break; |
| |
| CODE_EVENTS_TYPE_LIST(PROFILER_TYPE_CASE) |
| |
| #undef PROFILER_TYPE_CASE |
| default: return true; // Skip record. |
| } |
| last_processed_code_event_id_ = record.generic.order; |
| return true; |
| } |
| return false; |
| } |
| |
| ProfilerEventsProcessor::SampleProcessingResult |
| ProfilerEventsProcessor::ProcessOneSample() { |
| TickSampleEventRecord record1; |
| if (ticks_from_vm_buffer_.Peek(&record1) && |
| (record1.order == last_processed_code_event_id_)) { |
| TickSampleEventRecord record; |
| ticks_from_vm_buffer_.Dequeue(&record); |
| generator_->RecordTickSample(record.sample); |
| return OneSampleProcessed; |
| } |
| |
| const TickSampleEventRecord* record = ticks_buffer_.Peek(); |
| if (record == NULL) { |
| if (ticks_from_vm_buffer_.IsEmpty()) return NoSamplesInQueue; |
| return FoundSampleForNextCodeEvent; |
| } |
| if (record->order != last_processed_code_event_id_) { |
| return FoundSampleForNextCodeEvent; |
| } |
| generator_->RecordTickSample(record->sample); |
| ticks_buffer_.Remove(); |
| return OneSampleProcessed; |
| } |
| |
| |
| void ProfilerEventsProcessor::Run() { |
| while (!!base::NoBarrier_Load(&running_)) { |
| base::TimeTicks nextSampleTime = |
| base::TimeTicks::HighResolutionNow() + period_; |
| base::TimeTicks now; |
| SampleProcessingResult result; |
| // Keep processing existing events until we need to do next sample |
| // or the ticks buffer is empty. |
| do { |
| result = ProcessOneSample(); |
| if (result == FoundSampleForNextCodeEvent) { |
| // All ticks of the current last_processed_code_event_id_ are |
| // processed, proceed to the next code event. |
| ProcessCodeEvent(); |
| } |
| now = base::TimeTicks::HighResolutionNow(); |
| } while (result != NoSamplesInQueue && now < nextSampleTime); |
| |
| if (nextSampleTime > now) { |
| #if V8_OS_WIN |
| // Do not use Sleep on Windows as it is very imprecise. |
| // Could be up to 16ms jitter, which is unacceptable for the purpose. |
| while (base::TimeTicks::HighResolutionNow() < nextSampleTime) { |
| } |
| #else |
| base::OS::Sleep(nextSampleTime - now); |
| #endif |
| } |
| |
| // Schedule next sample. sampler_ is NULL in tests. |
| if (sampler_) sampler_->DoSample(); |
| } |
| |
| // Process remaining tick events. |
| do { |
| SampleProcessingResult result; |
| do { |
| result = ProcessOneSample(); |
| } while (result == OneSampleProcessed); |
| } while (ProcessCodeEvent()); |
| } |
| |
| |
| void* ProfilerEventsProcessor::operator new(size_t size) { |
| return AlignedAlloc(size, V8_ALIGNOF(ProfilerEventsProcessor)); |
| } |
| |
| |
| void ProfilerEventsProcessor::operator delete(void* ptr) { |
| AlignedFree(ptr); |
| } |
| |
| |
| int CpuProfiler::GetProfilesCount() { |
| // The count of profiles doesn't depend on a security token. |
| return profiles_->profiles()->length(); |
| } |
| |
| |
| CpuProfile* CpuProfiler::GetProfile(int index) { |
| return profiles_->profiles()->at(index); |
| } |
| |
| |
| void CpuProfiler::DeleteAllProfiles() { |
| if (is_profiling_) StopProcessor(); |
| ResetProfiles(); |
| } |
| |
| |
| void CpuProfiler::DeleteProfile(CpuProfile* profile) { |
| profiles_->RemoveProfile(profile); |
| delete profile; |
| if (profiles_->profiles()->is_empty() && !is_profiling_) { |
| // If this was the last profile, clean up all accessory data as well. |
| ResetProfiles(); |
| } |
| } |
| |
| |
| void CpuProfiler::CallbackEvent(Name* name, Address entry_point) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = entry_point; |
| rec->entry = profiles_->NewCodeEntry( |
| Logger::CALLBACK_TAG, |
| profiles_->GetName(name)); |
| rec->size = 1; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::CodeCreateEvent(Logger::LogEventsAndTags tag, |
| Code* code, |
| const char* name) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = code->address(); |
| rec->entry = profiles_->NewCodeEntry( |
| tag, profiles_->GetFunctionName(name), CodeEntry::kEmptyNamePrefix, |
| CodeEntry::kEmptyResourceName, CpuProfileNode::kNoLineNumberInfo, |
| CpuProfileNode::kNoColumnNumberInfo, NULL, code->instruction_start()); |
| rec->size = code->ExecutableSize(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::CodeCreateEvent(Logger::LogEventsAndTags tag, |
| Code* code, |
| Name* name) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = code->address(); |
| rec->entry = profiles_->NewCodeEntry( |
| tag, profiles_->GetFunctionName(name), CodeEntry::kEmptyNamePrefix, |
| CodeEntry::kEmptyResourceName, CpuProfileNode::kNoLineNumberInfo, |
| CpuProfileNode::kNoColumnNumberInfo, NULL, code->instruction_start()); |
| rec->size = code->ExecutableSize(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::CodeCreateEvent(Logger::LogEventsAndTags tag, Code* code, |
| SharedFunctionInfo* shared, |
| CompilationInfo* info, Name* script_name) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = code->address(); |
| rec->entry = profiles_->NewCodeEntry( |
| tag, profiles_->GetFunctionName(shared->DebugName()), |
| CodeEntry::kEmptyNamePrefix, profiles_->GetName(script_name), |
| CpuProfileNode::kNoLineNumberInfo, CpuProfileNode::kNoColumnNumberInfo, |
| NULL, code->instruction_start()); |
| if (info) { |
| rec->entry->set_inlined_function_infos(info->inlined_function_infos()); |
| } |
| rec->entry->FillFunctionInfo(shared); |
| rec->size = code->ExecutableSize(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::CodeCreateEvent(Logger::LogEventsAndTags tag, Code* code, |
| SharedFunctionInfo* shared, |
| CompilationInfo* info, Name* script_name, |
| int line, int column) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = code->address(); |
| Script* script = Script::cast(shared->script()); |
| JITLineInfoTable* line_table = NULL; |
| if (script) { |
| line_table = new JITLineInfoTable(); |
| for (RelocIterator it(code); !it.done(); it.next()) { |
| RelocInfo::Mode mode = it.rinfo()->rmode(); |
| if (RelocInfo::IsPosition(mode)) { |
| int position = static_cast<int>(it.rinfo()->data()); |
| if (position >= 0) { |
| int pc_offset = static_cast<int>(it.rinfo()->pc() - code->address()); |
| int line_number = script->GetLineNumber(position) + 1; |
| line_table->SetPosition(pc_offset, line_number); |
| } |
| } |
| } |
| } |
| rec->entry = profiles_->NewCodeEntry( |
| tag, profiles_->GetFunctionName(shared->DebugName()), |
| CodeEntry::kEmptyNamePrefix, profiles_->GetName(script_name), line, |
| column, line_table, code->instruction_start()); |
| if (info) { |
| rec->entry->set_inlined_function_infos(info->inlined_function_infos()); |
| } |
| rec->entry->FillFunctionInfo(shared); |
| rec->size = code->ExecutableSize(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::CodeCreateEvent(Logger::LogEventsAndTags tag, |
| Code* code, |
| int args_count) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = code->address(); |
| rec->entry = profiles_->NewCodeEntry( |
| tag, profiles_->GetName(args_count), "args_count: ", |
| CodeEntry::kEmptyResourceName, CpuProfileNode::kNoLineNumberInfo, |
| CpuProfileNode::kNoColumnNumberInfo, NULL, code->instruction_start()); |
| rec->size = code->ExecutableSize(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::CodeMoveEvent(Address from, Address to) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_MOVE); |
| CodeMoveEventRecord* rec = &evt_rec.CodeMoveEventRecord_; |
| rec->from = from; |
| rec->to = to; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::CodeDisableOptEvent(Code* code, SharedFunctionInfo* shared) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_DISABLE_OPT); |
| CodeDisableOptEventRecord* rec = &evt_rec.CodeDisableOptEventRecord_; |
| rec->start = code->address(); |
| rec->bailout_reason = GetBailoutReason(shared->disable_optimization_reason()); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::CodeDeoptEvent(Code* code, Address pc, int fp_to_sp_delta) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_DEOPT); |
| CodeDeoptEventRecord* rec = &evt_rec.CodeDeoptEventRecord_; |
| Deoptimizer::DeoptInfo info = Deoptimizer::GetDeoptInfo(code, pc); |
| rec->start = code->address(); |
| rec->deopt_reason = Deoptimizer::GetDeoptReason(info.deopt_reason); |
| rec->position = info.position; |
| rec->pc_offset = pc - code->instruction_start(); |
| processor_->Enqueue(evt_rec); |
| processor_->AddDeoptStack(isolate_, pc, fp_to_sp_delta); |
| } |
| |
| |
| void CpuProfiler::CodeDeleteEvent(Address from) { |
| } |
| |
| |
| void CpuProfiler::GetterCallbackEvent(Name* name, Address entry_point) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = entry_point; |
| rec->entry = profiles_->NewCodeEntry( |
| Logger::CALLBACK_TAG, |
| profiles_->GetName(name), |
| "get "); |
| rec->size = 1; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::RegExpCodeCreateEvent(Code* code, String* source) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = code->address(); |
| rec->entry = profiles_->NewCodeEntry( |
| Logger::REG_EXP_TAG, profiles_->GetName(source), "RegExp: ", |
| CodeEntry::kEmptyResourceName, CpuProfileNode::kNoLineNumberInfo, |
| CpuProfileNode::kNoColumnNumberInfo, NULL, code->instruction_start()); |
| rec->size = code->ExecutableSize(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::SetterCallbackEvent(Name* name, Address entry_point) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = entry_point; |
| rec->entry = profiles_->NewCodeEntry( |
| Logger::CALLBACK_TAG, |
| profiles_->GetName(name), |
| "set "); |
| rec->size = 1; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| CpuProfiler::CpuProfiler(Isolate* isolate) |
| : isolate_(isolate), |
| sampling_interval_(base::TimeDelta::FromMicroseconds( |
| FLAG_cpu_profiler_sampling_interval)), |
| profiles_(new CpuProfilesCollection(isolate->heap())), |
| generator_(NULL), |
| processor_(NULL), |
| is_profiling_(false) { |
| } |
| |
| |
| CpuProfiler::CpuProfiler(Isolate* isolate, |
| CpuProfilesCollection* test_profiles, |
| ProfileGenerator* test_generator, |
| ProfilerEventsProcessor* test_processor) |
| : isolate_(isolate), |
| sampling_interval_(base::TimeDelta::FromMicroseconds( |
| FLAG_cpu_profiler_sampling_interval)), |
| profiles_(test_profiles), |
| generator_(test_generator), |
| processor_(test_processor), |
| is_profiling_(false) { |
| } |
| |
| |
| CpuProfiler::~CpuProfiler() { |
| DCHECK(!is_profiling_); |
| delete profiles_; |
| } |
| |
| |
| void CpuProfiler::set_sampling_interval(base::TimeDelta value) { |
| DCHECK(!is_profiling_); |
| sampling_interval_ = value; |
| } |
| |
| |
| void CpuProfiler::ResetProfiles() { |
| delete profiles_; |
| profiles_ = new CpuProfilesCollection(isolate()->heap()); |
| } |
| |
| |
| void CpuProfiler::StartProfiling(const char* title, bool record_samples) { |
| if (profiles_->StartProfiling(title, record_samples)) { |
| StartProcessorIfNotStarted(); |
| } |
| } |
| |
| |
| void CpuProfiler::StartProfiling(String* title, bool record_samples) { |
| StartProfiling(profiles_->GetName(title), record_samples); |
| isolate_->debug()->feature_tracker()->Track(DebugFeatureTracker::kProfiler); |
| } |
| |
| |
| void CpuProfiler::StartProcessorIfNotStarted() { |
| if (processor_ != NULL) { |
| processor_->AddCurrentStack(isolate_); |
| return; |
| } |
| Logger* logger = isolate_->logger(); |
| // Disable logging when using the new implementation. |
| saved_is_logging_ = logger->is_logging_; |
| logger->is_logging_ = false; |
| generator_ = new ProfileGenerator(profiles_); |
| Sampler* sampler = logger->sampler(); |
| processor_ = new ProfilerEventsProcessor( |
| generator_, sampler, sampling_interval_); |
| is_profiling_ = true; |
| // Enumerate stuff we already have in the heap. |
| DCHECK(isolate_->heap()->HasBeenSetUp()); |
| if (!FLAG_prof_browser_mode) { |
| logger->LogCodeObjects(); |
| } |
| logger->LogCompiledFunctions(); |
| logger->LogAccessorCallbacks(); |
| LogBuiltins(); |
| // Enable stack sampling. |
| sampler->SetHasProcessingThread(true); |
| sampler->IncreaseProfilingDepth(); |
| processor_->AddCurrentStack(isolate_); |
| processor_->StartSynchronously(); |
| } |
| |
| |
| CpuProfile* CpuProfiler::StopProfiling(const char* title) { |
| if (!is_profiling_) return NULL; |
| StopProcessorIfLastProfile(title); |
| CpuProfile* result = profiles_->StopProfiling(title); |
| if (result != NULL) { |
| result->Print(); |
| } |
| return result; |
| } |
| |
| |
| CpuProfile* CpuProfiler::StopProfiling(String* title) { |
| if (!is_profiling_) return NULL; |
| const char* profile_title = profiles_->GetName(title); |
| StopProcessorIfLastProfile(profile_title); |
| return profiles_->StopProfiling(profile_title); |
| } |
| |
| |
| void CpuProfiler::StopProcessorIfLastProfile(const char* title) { |
| if (profiles_->IsLastProfile(title)) StopProcessor(); |
| } |
| |
| |
| void CpuProfiler::StopProcessor() { |
| Logger* logger = isolate_->logger(); |
| Sampler* sampler = reinterpret_cast<Sampler*>(logger->ticker_); |
| is_profiling_ = false; |
| processor_->StopSynchronously(); |
| delete processor_; |
| delete generator_; |
| processor_ = NULL; |
| generator_ = NULL; |
| sampler->SetHasProcessingThread(false); |
| sampler->DecreaseProfilingDepth(); |
| logger->is_logging_ = saved_is_logging_; |
| } |
| |
| |
| void CpuProfiler::LogBuiltins() { |
| Builtins* builtins = isolate_->builtins(); |
| DCHECK(builtins->is_initialized()); |
| for (int i = 0; i < Builtins::builtin_count; i++) { |
| CodeEventsContainer evt_rec(CodeEventRecord::REPORT_BUILTIN); |
| ReportBuiltinEventRecord* rec = &evt_rec.ReportBuiltinEventRecord_; |
| Builtins::Name id = static_cast<Builtins::Name>(i); |
| rec->start = builtins->builtin(id)->address(); |
| rec->builtin_id = id; |
| processor_->Enqueue(evt_rec); |
| } |
| } |
| |
| |
| } // namespace internal |
| } // namespace v8 |