| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "v8.h" |
| |
| #include "cpu-profiler-inl.h" |
| |
| #include "compiler.h" |
| #include "frames-inl.h" |
| #include "hashmap.h" |
| #include "log-inl.h" |
| #include "vm-state-inl.h" |
| |
| #include "../include/v8-profiler.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| static const int kTickSamplesBufferChunkSize = 64 * KB; |
| static const int kTickSamplesBufferChunksCount = 16; |
| static const int kProfilerStackSize = 64 * KB; |
| |
| |
| ProfilerEventsProcessor::ProfilerEventsProcessor(ProfileGenerator* generator) |
| : Thread(Thread::Options("v8:ProfEvntProc", kProfilerStackSize)), |
| generator_(generator), |
| running_(true), |
| ticks_buffer_(sizeof(TickSampleEventRecord), |
| kTickSamplesBufferChunkSize, |
| kTickSamplesBufferChunksCount), |
| last_code_event_id_(0), last_processed_code_event_id_(0) { |
| } |
| |
| |
| void ProfilerEventsProcessor::Enqueue(const CodeEventsContainer& event) { |
| event.generic.order = ++last_code_event_id_; |
| events_buffer_.Enqueue(event); |
| } |
| |
| |
| void ProfilerEventsProcessor::AddCurrentStack(Isolate* isolate) { |
| TickSampleEventRecord record(last_code_event_id_); |
| TickSample* sample = &record.sample; |
| sample->state = isolate->current_vm_state(); |
| sample->pc = reinterpret_cast<Address>(sample); // Not NULL. |
| for (StackTraceFrameIterator it(isolate); |
| !it.done() && sample->frames_count < TickSample::kMaxFramesCount; |
| it.Advance()) { |
| sample->stack[sample->frames_count++] = it.frame()->pc(); |
| } |
| ticks_from_vm_buffer_.Enqueue(record); |
| } |
| |
| |
| void ProfilerEventsProcessor::StopSynchronously() { |
| if (!running_) return; |
| running_ = false; |
| 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; |
| } |
| |
| |
| bool ProfilerEventsProcessor::ProcessTicks() { |
| while (true) { |
| while (!ticks_from_vm_buffer_.IsEmpty() |
| && ticks_from_vm_buffer_.Peek()->order == |
| last_processed_code_event_id_) { |
| TickSampleEventRecord record; |
| ticks_from_vm_buffer_.Dequeue(&record); |
| generator_->RecordTickSample(record.sample); |
| } |
| |
| const TickSampleEventRecord* rec = |
| TickSampleEventRecord::cast(ticks_buffer_.StartDequeue()); |
| if (rec == NULL) return !ticks_from_vm_buffer_.IsEmpty(); |
| // Make a local copy of tick sample record to ensure that it won't |
| // be modified as we are processing it. This is possible as the |
| // sampler writes w/o any sync to the queue, so if the processor |
| // will get far behind, a record may be modified right under its |
| // feet. |
| TickSampleEventRecord record = *rec; |
| if (record.order != last_processed_code_event_id_) return true; |
| |
| // A paranoid check to make sure that we don't get a memory overrun |
| // in case of frames_count having a wild value. |
| if (record.sample.frames_count < 0 |
| || record.sample.frames_count > TickSample::kMaxFramesCount) |
| record.sample.frames_count = 0; |
| generator_->RecordTickSample(record.sample); |
| ticks_buffer_.FinishDequeue(); |
| } |
| } |
| |
| |
| void ProfilerEventsProcessor::Run() { |
| while (running_) { |
| // Process ticks until we have any. |
| if (ProcessTicks()) { |
| // All ticks of the current last_processed_code_event_id_ are processed, |
| // proceed to the next code event. |
| ProcessCodeEvent(); |
| } |
| YieldCPU(); |
| } |
| |
| // Process remaining tick events. |
| ticks_buffer_.FlushResidualRecords(); |
| do { |
| ProcessTicks(); |
| } while (ProcessCodeEvent()); |
| } |
| |
| |
| 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); |
| } |
| |
| |
| TickSample* CpuProfiler::TickSampleEvent() { |
| if (is_profiling_) return processor_->TickSampleEvent(); |
| return NULL; |
| } |
| |
| |
| void CpuProfiler::DeleteAllProfiles() { |
| if (is_profiling_) StopProcessor(); |
| ResetProfiles(); |
| } |
| |
| |
| void CpuProfiler::DeleteProfile(CpuProfile* profile) { |
| profiles_->RemoveProfile(profile); |
| delete profile; |
| } |
| |
| |
| static bool FilterOutCodeCreateEvent(Logger::LogEventsAndTags tag) { |
| return FLAG_prof_browser_mode |
| && (tag != Logger::CALLBACK_TAG |
| && tag != Logger::FUNCTION_TAG |
| && tag != Logger::LAZY_COMPILE_TAG |
| && tag != Logger::REG_EXP_TAG |
| && tag != Logger::SCRIPT_TAG); |
| } |
| |
| |
| void CpuProfiler::CallbackEvent(Name* name, Address entry_point) { |
| if (FilterOutCodeCreateEvent(Logger::CALLBACK_TAG)) return; |
| 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; |
| rec->shared = NULL; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::CodeCreateEvent(Logger::LogEventsAndTags tag, |
| Code* code, |
| const char* name) { |
| if (FilterOutCodeCreateEvent(tag)) return; |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = code->address(); |
| rec->entry = profiles_->NewCodeEntry(tag, profiles_->GetFunctionName(name)); |
| rec->size = code->ExecutableSize(); |
| rec->shared = NULL; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::CodeCreateEvent(Logger::LogEventsAndTags tag, |
| Code* code, |
| Name* name) { |
| if (FilterOutCodeCreateEvent(tag)) return; |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = code->address(); |
| rec->entry = profiles_->NewCodeEntry(tag, profiles_->GetFunctionName(name)); |
| rec->size = code->ExecutableSize(); |
| rec->shared = NULL; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::CodeCreateEvent(Logger::LogEventsAndTags tag, |
| Code* code, |
| SharedFunctionInfo* shared, |
| CompilationInfo* info, |
| Name* name) { |
| if (FilterOutCodeCreateEvent(tag)) return; |
| CodeEventsContainer evt_rec(CodeEventRecord::CODE_CREATION); |
| CodeCreateEventRecord* rec = &evt_rec.CodeCreateEventRecord_; |
| rec->start = code->address(); |
| rec->entry = profiles_->NewCodeEntry(tag, profiles_->GetFunctionName(name)); |
| if (info) { |
| rec->entry->set_no_frame_ranges(info->ReleaseNoFrameRanges()); |
| } |
| if (shared->script()->IsScript()) { |
| ASSERT(Script::cast(shared->script())); |
| Script* script = Script::cast(shared->script()); |
| rec->entry->set_script_id(script->id()->value()); |
| } |
| rec->size = code->ExecutableSize(); |
| rec->shared = shared->address(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::CodeCreateEvent(Logger::LogEventsAndTags tag, |
| Code* code, |
| SharedFunctionInfo* shared, |
| CompilationInfo* info, |
| Name* source, int line) { |
| if (FilterOutCodeCreateEvent(tag)) return; |
| 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(source), |
| line); |
| if (info) { |
| rec->entry->set_no_frame_ranges(info->ReleaseNoFrameRanges()); |
| } |
| ASSERT(Script::cast(shared->script())); |
| Script* script = Script::cast(shared->script()); |
| rec->entry->set_script_id(script->id()->value()); |
| rec->size = code->ExecutableSize(); |
| rec->shared = shared->address(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::CodeCreateEvent(Logger::LogEventsAndTags tag, |
| Code* code, |
| int args_count) { |
| if (FilterOutCodeCreateEvent(tag)) return; |
| 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: "); |
| rec->size = code->ExecutableSize(); |
| rec->shared = NULL; |
| 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::CodeDeleteEvent(Address from) { |
| } |
| |
| |
| void CpuProfiler::SharedFunctionInfoMoveEvent(Address from, Address to) { |
| CodeEventsContainer evt_rec(CodeEventRecord::SHARED_FUNC_MOVE); |
| SharedFunctionInfoMoveEventRecord* rec = |
| &evt_rec.SharedFunctionInfoMoveEventRecord_; |
| rec->from = from; |
| rec->to = to; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::GetterCallbackEvent(Name* name, Address entry_point) { |
| if (FilterOutCodeCreateEvent(Logger::CALLBACK_TAG)) return; |
| 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; |
| rec->shared = NULL; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::RegExpCodeCreateEvent(Code* code, String* source) { |
| if (FilterOutCodeCreateEvent(Logger::REG_EXP_TAG)) return; |
| 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: "); |
| rec->size = code->ExecutableSize(); |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| void CpuProfiler::SetterCallbackEvent(Name* name, Address entry_point) { |
| if (FilterOutCodeCreateEvent(Logger::CALLBACK_TAG)) return; |
| 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; |
| rec->shared = NULL; |
| processor_->Enqueue(evt_rec); |
| } |
| |
| |
| CpuProfiler::CpuProfiler(Isolate* isolate) |
| : isolate_(isolate), |
| profiles_(new CpuProfilesCollection()), |
| next_profile_uid_(1), |
| generator_(NULL), |
| processor_(NULL), |
| need_to_stop_sampler_(false), |
| is_profiling_(false) { |
| } |
| |
| |
| CpuProfiler::CpuProfiler(Isolate* isolate, |
| CpuProfilesCollection* test_profiles, |
| ProfileGenerator* test_generator, |
| ProfilerEventsProcessor* test_processor) |
| : isolate_(isolate), |
| profiles_(test_profiles), |
| next_profile_uid_(1), |
| generator_(test_generator), |
| processor_(test_processor), |
| need_to_stop_sampler_(false), |
| is_profiling_(false) { |
| } |
| |
| |
| CpuProfiler::~CpuProfiler() { |
| ASSERT(!is_profiling_); |
| delete profiles_; |
| } |
| |
| |
| void CpuProfiler::ResetProfiles() { |
| delete profiles_; |
| profiles_ = new CpuProfilesCollection(); |
| } |
| |
| |
| void CpuProfiler::StartProfiling(const char* title, bool record_samples) { |
| if (profiles_->StartProfiling(title, next_profile_uid_++, record_samples)) { |
| StartProcessorIfNotStarted(); |
| } |
| processor_->AddCurrentStack(isolate_); |
| } |
| |
| |
| void CpuProfiler::StartProfiling(String* title, bool record_samples) { |
| StartProfiling(profiles_->GetName(title), record_samples); |
| } |
| |
| |
| void CpuProfiler::StartProcessorIfNotStarted() { |
| if (processor_ == NULL) { |
| Logger* logger = isolate_->logger(); |
| // Disable logging when using the new implementation. |
| saved_logging_nesting_ = logger->logging_nesting_; |
| logger->logging_nesting_ = 0; |
| generator_ = new ProfileGenerator(profiles_); |
| processor_ = new ProfilerEventsProcessor(generator_); |
| is_profiling_ = true; |
| processor_->StartSynchronously(); |
| // Enumerate stuff we already have in the heap. |
| ASSERT(isolate_->heap()->HasBeenSetUp()); |
| if (!FLAG_prof_browser_mode) { |
| logger->LogCodeObjects(); |
| } |
| logger->LogCompiledFunctions(); |
| logger->LogAccessorCallbacks(); |
| LogBuiltins(); |
| // Enable stack sampling. |
| Sampler* sampler = logger->sampler(); |
| sampler->IncreaseProfilingDepth(); |
| if (!sampler->IsActive()) { |
| sampler->Start(); |
| need_to_stop_sampler_ = true; |
| } |
| } |
| } |
| |
| |
| 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_); |
| sampler->DecreaseProfilingDepth(); |
| if (need_to_stop_sampler_) { |
| sampler->Stop(); |
| need_to_stop_sampler_ = false; |
| } |
| is_profiling_ = false; |
| processor_->StopSynchronously(); |
| delete processor_; |
| delete generator_; |
| processor_ = NULL; |
| generator_ = NULL; |
| logger->logging_nesting_ = saved_logging_nesting_; |
| } |
| |
| |
| void CpuProfiler::LogBuiltins() { |
| Builtins* builtins = isolate_->builtins(); |
| ASSERT(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 v8::internal |