| // 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* 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, false); |
| ticks_from_vm_buffer_.Enqueue(record); |
| } |
| |
| void ProfilerEventsProcessor::AddCurrentStack(Isolate* isolate, |
| bool update_stats) { |
| 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, update_stats); |
| 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(CodeEventListener::CALLBACK_TAG, |
| profiles_->GetName(name)); |
| rec->size = 1; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| void CpuProfiler::CodeCreateEvent(CodeEventListener::LogEventsAndTags tag, |
| AbstractCode* 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()); |
| RecordInliningInfo(rec->entry, code); |
| rec->size = code->ExecutableSize(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| void CpuProfiler::CodeCreateEvent(CodeEventListener::LogEventsAndTags tag, |
| AbstractCode* 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()); |
| RecordInliningInfo(rec->entry, code); |
| rec->size = code->ExecutableSize(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| void CpuProfiler::CodeCreateEvent(CodeEventListener::LogEventsAndTags tag, |
| AbstractCode* code, |
| SharedFunctionInfo* shared, |
| 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(InferScriptName(script_name, shared)), |
| CpuProfileNode::kNoLineNumberInfo, CpuProfileNode::kNoColumnNumberInfo, |
| NULL, code->instruction_start()); |
| RecordInliningInfo(rec->entry, code); |
| rec->entry->FillFunctionInfo(shared); |
| rec->size = code->ExecutableSize(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| void CpuProfiler::CodeCreateEvent(CodeEventListener::LogEventsAndTags tag, |
| AbstractCode* abstract_code, |
| SharedFunctionInfo* shared, Name* script_name, |
| int line, int column) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = abstract_code->address(); |
| Script* script = Script::cast(shared->script()); |
| JITLineInfoTable* line_table = NULL; |
| if (script) { |
| if (abstract_code->IsCode()) { |
| Code* code = abstract_code->GetCode(); |
| int start_position = shared->start_position(); |
| int end_position = shared->end_position(); |
| line_table = new JITLineInfoTable(); |
| for (RelocIterator it(code); !it.done(); it.next()) { |
| RelocInfo* reloc_info = it.rinfo(); |
| if (!RelocInfo::IsPosition(reloc_info->rmode())) continue; |
| int position = static_cast<int>(reloc_info->data()); |
| // TODO(alph): in case of inlining the position may correspond |
| // to an inlined function source code. Do not collect positions |
| // that fall beyond the function source code. There's however a |
| // chance the inlined function has similar positions but in another |
| // script. So the proper fix is to store script_id in some form |
| // along with the inlined function positions. |
| if (position < start_position || position >= end_position) continue; |
| int pc_offset = static_cast<int>(reloc_info->pc() - code->address()); |
| int line_number = script->GetLineNumber(position) + 1; |
| line_table->SetPosition(pc_offset, line_number); |
| } |
| } else { |
| BytecodeArray* bytecode = abstract_code->GetBytecodeArray(); |
| line_table = new JITLineInfoTable(); |
| interpreter::SourcePositionTableIterator it( |
| bytecode->source_position_table()); |
| for (; !it.done(); it.Advance()) { |
| int line_number = script->GetLineNumber(it.source_position()) + 1; |
| int pc_offset = it.bytecode_offset() + BytecodeArray::kHeaderSize; |
| line_table->SetPosition(pc_offset, line_number); |
| } |
| } |
| } |
| rec->entry = profiles_->NewCodeEntry( |
| tag, profiles_->GetFunctionName(shared->DebugName()), |
| CodeEntry::kEmptyNamePrefix, |
| profiles_->GetName(InferScriptName(script_name, shared)), line, column, |
| line_table, abstract_code->instruction_start()); |
| RecordInliningInfo(rec->entry, abstract_code); |
| RecordDeoptInlinedFrames(rec->entry, abstract_code); |
| rec->entry->FillFunctionInfo(shared); |
| rec->size = abstract_code->ExecutableSize(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| void CpuProfiler::CodeCreateEvent(CodeEventListener::LogEventsAndTags tag, |
| AbstractCode* 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()); |
| RecordInliningInfo(rec->entry, code); |
| rec->size = code->ExecutableSize(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| void CpuProfiler::CodeMoveEvent(AbstractCode* from, Address to) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_MOVE); |
| CodeMoveEventRecord* rec = &evt_rec.CodeMoveEventRecord_; |
| rec->from = from->address(); |
| rec->to = to; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| void CpuProfiler::CodeDisableOptEvent(AbstractCode* 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->deopt_id = info.deopt_id; |
| processor_->Enqueue(evt_rec); |
| processor_->AddDeoptStack(isolate_, pc, fp_to_sp_delta); |
| } |
| |
| 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(CodeEventListener::CALLBACK_TAG, |
| profiles_->GetName(name), "get "); |
| rec->size = 1; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| void CpuProfiler::RegExpCodeCreateEvent(AbstractCode* code, String* source) { |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = code->address(); |
| rec->entry = profiles_->NewCodeEntry( |
| CodeEventListener::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(CodeEventListener::CALLBACK_TAG, |
| profiles_->GetName(name), "set "); |
| rec->size = 1; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| Name* CpuProfiler::InferScriptName(Name* name, SharedFunctionInfo* info) { |
| if (name->IsString() && String::cast(name)->length()) return name; |
| if (!info->script()->IsScript()) return name; |
| Object* source_url = Script::cast(info->script())->source_url(); |
| return source_url->IsName() ? Name::cast(source_url) : name; |
| } |
| |
| void CpuProfiler::RecordInliningInfo(CodeEntry* entry, |
| AbstractCode* abstract_code) { |
| if (!abstract_code->IsCode()) return; |
| Code* code = abstract_code->GetCode(); |
| if (code->kind() != Code::OPTIMIZED_FUNCTION) return; |
| DeoptimizationInputData* deopt_input_data = |
| DeoptimizationInputData::cast(code->deoptimization_data()); |
| int deopt_count = deopt_input_data->DeoptCount(); |
| for (int i = 0; i < deopt_count; i++) { |
| int pc_offset = deopt_input_data->Pc(i)->value(); |
| if (pc_offset == -1) continue; |
| int translation_index = deopt_input_data->TranslationIndex(i)->value(); |
| TranslationIterator it(deopt_input_data->TranslationByteArray(), |
| translation_index); |
| Translation::Opcode opcode = static_cast<Translation::Opcode>(it.Next()); |
| DCHECK_EQ(Translation::BEGIN, opcode); |
| it.Skip(Translation::NumberOfOperandsFor(opcode)); |
| int depth = 0; |
| std::vector<CodeEntry*> inline_stack; |
| while (it.HasNext() && |
| Translation::BEGIN != |
| (opcode = static_cast<Translation::Opcode>(it.Next()))) { |
| if (opcode != Translation::JS_FRAME && |
| opcode != Translation::INTERPRETED_FRAME) { |
| it.Skip(Translation::NumberOfOperandsFor(opcode)); |
| continue; |
| } |
| it.Next(); // Skip ast_id |
| int shared_info_id = it.Next(); |
| it.Next(); // Skip height |
| SharedFunctionInfo* shared_info = SharedFunctionInfo::cast( |
| deopt_input_data->LiteralArray()->get(shared_info_id)); |
| if (!depth++) continue; // Skip the current function itself. |
| CodeEntry* inline_entry = new CodeEntry( |
| entry->tag(), profiles_->GetFunctionName(shared_info->DebugName()), |
| CodeEntry::kEmptyNamePrefix, entry->resource_name(), |
| CpuProfileNode::kNoLineNumberInfo, |
| CpuProfileNode::kNoColumnNumberInfo, NULL, code->instruction_start()); |
| inline_entry->FillFunctionInfo(shared_info); |
| inline_stack.push_back(inline_entry); |
| } |
| if (!inline_stack.empty()) { |
| entry->AddInlineStack(pc_offset, inline_stack); |
| DCHECK(inline_stack.empty()); |
| } |
| } |
| } |
| |
| void CpuProfiler::RecordDeoptInlinedFrames(CodeEntry* entry, |
| AbstractCode* abstract_code) { |
| if (abstract_code->kind() != AbstractCode::OPTIMIZED_FUNCTION) return; |
| Code* code = abstract_code->GetCode(); |
| DeoptimizationInputData* deopt_input_data = |
| DeoptimizationInputData::cast(code->deoptimization_data()); |
| int const mask = RelocInfo::ModeMask(RelocInfo::DEOPT_ID); |
| for (RelocIterator rit(code, mask); !rit.done(); rit.next()) { |
| RelocInfo* reloc_info = rit.rinfo(); |
| DCHECK(RelocInfo::IsDeoptId(reloc_info->rmode())); |
| int deopt_id = static_cast<int>(reloc_info->data()); |
| int translation_index = |
| deopt_input_data->TranslationIndex(deopt_id)->value(); |
| TranslationIterator it(deopt_input_data->TranslationByteArray(), |
| translation_index); |
| Translation::Opcode opcode = static_cast<Translation::Opcode>(it.Next()); |
| DCHECK_EQ(Translation::BEGIN, opcode); |
| it.Skip(Translation::NumberOfOperandsFor(opcode)); |
| std::vector<CodeEntry::DeoptInlinedFrame> inlined_frames; |
| while (it.HasNext() && |
| Translation::BEGIN != |
| (opcode = static_cast<Translation::Opcode>(it.Next()))) { |
| if (opcode != Translation::JS_FRAME && |
| opcode != Translation::INTERPRETED_FRAME) { |
| it.Skip(Translation::NumberOfOperandsFor(opcode)); |
| continue; |
| } |
| BailoutId ast_id = BailoutId(it.Next()); |
| int shared_info_id = it.Next(); |
| it.Next(); // Skip height |
| SharedFunctionInfo* shared = SharedFunctionInfo::cast( |
| deopt_input_data->LiteralArray()->get(shared_info_id)); |
| int source_position = Deoptimizer::ComputeSourcePosition(shared, ast_id); |
| int script_id = v8::UnboundScript::kNoScriptId; |
| if (shared->script()->IsScript()) { |
| Script* script = Script::cast(shared->script()); |
| script_id = script->id(); |
| } |
| CodeEntry::DeoptInlinedFrame frame = {source_position, script_id}; |
| inlined_frames.push_back(frame); |
| } |
| if (!inlined_frames.empty() && !entry->HasDeoptInlinedFramesFor(deopt_id)) { |
| entry->AddDeoptInlinedFrames(deopt_id, inlined_frames); |
| DCHECK(inlined_frames.empty()); |
| } |
| } |
| } |
| |
| CpuProfiler::CpuProfiler(Isolate* isolate) |
| : isolate_(isolate), |
| sampling_interval_(base::TimeDelta::FromMicroseconds( |
| FLAG_cpu_profiler_sampling_interval)), |
| profiles_(new CpuProfilesCollection(isolate)), |
| is_profiling_(false) { |
| profiles_->set_cpu_profiler(this); |
| } |
| |
| 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) { |
| profiles_->set_cpu_profiler(this); |
| } |
| |
| CpuProfiler::~CpuProfiler() { |
| DCHECK(!is_profiling_); |
| } |
| |
| void CpuProfiler::set_sampling_interval(base::TimeDelta value) { |
| DCHECK(!is_profiling_); |
| sampling_interval_ = value; |
| } |
| |
| void CpuProfiler::ResetProfiles() { |
| profiles_.reset(new CpuProfilesCollection(isolate_)); |
| profiles_->set_cpu_profiler(this); |
| } |
| |
| void CpuProfiler::CollectSample() { |
| if (processor_) { |
| processor_->AddCurrentStack(isolate_); |
| } |
| } |
| |
| 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_) { |
| 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; |
| sampler::Sampler* sampler = logger->sampler(); |
| generator_.reset(new ProfileGenerator(profiles_.get())); |
| processor_.reset(new ProfilerEventsProcessor(generator_.get(), sampler, |
| sampling_interval_)); |
| is_profiling_ = true; |
| isolate_->set_is_profiling(true); |
| // Enumerate stuff we already have in the heap. |
| DCHECK(isolate_->heap()->HasBeenSetUp()); |
| isolate_->code_event_dispatcher()->AddListener(this); |
| 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 nullptr; |
| StopProcessorIfLastProfile(title); |
| CpuProfile* result = profiles_->StopProfiling(title); |
| if (result) { |
| result->Print(); |
| } |
| return result; |
| } |
| |
| |
| CpuProfile* CpuProfiler::StopProfiling(String* title) { |
| if (!is_profiling_) return nullptr; |
| 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* sampler = |
| reinterpret_cast<sampler::Sampler*>(logger->ticker_); |
| is_profiling_ = false; |
| isolate_->set_is_profiling(false); |
| isolate_->code_event_dispatcher()->RemoveListener(this); |
| processor_->StopSynchronously(); |
| processor_.reset(); |
| generator_.reset(); |
| 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 |
