Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "src/profiler/cpu-profiler.h" |
| 6 | |
| 7 | #include "src/debug/debug.h" |
| 8 | #include "src/deoptimizer.h" |
| 9 | #include "src/frames-inl.h" |
| 10 | #include "src/locked-queue-inl.h" |
| 11 | #include "src/log-inl.h" |
| 12 | #include "src/profiler/cpu-profiler-inl.h" |
| 13 | #include "src/vm-state-inl.h" |
| 14 | |
| 15 | #include "include/v8-profiler.h" |
| 16 | |
| 17 | namespace v8 { |
| 18 | namespace internal { |
| 19 | |
| 20 | static const int kProfilerStackSize = 64 * KB; |
| 21 | |
| 22 | |
| 23 | ProfilerEventsProcessor::ProfilerEventsProcessor(ProfileGenerator* generator, |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 24 | sampler::Sampler* sampler, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 25 | base::TimeDelta period) |
| 26 | : Thread(Thread::Options("v8:ProfEvntProc", kProfilerStackSize)), |
| 27 | generator_(generator), |
| 28 | sampler_(sampler), |
| 29 | running_(1), |
| 30 | period_(period), |
| 31 | last_code_event_id_(0), |
| 32 | last_processed_code_event_id_(0) {} |
| 33 | |
| 34 | |
| 35 | ProfilerEventsProcessor::~ProfilerEventsProcessor() {} |
| 36 | |
| 37 | |
| 38 | void ProfilerEventsProcessor::Enqueue(const CodeEventsContainer& event) { |
| 39 | event.generic.order = last_code_event_id_.Increment(1); |
| 40 | events_buffer_.Enqueue(event); |
| 41 | } |
| 42 | |
| 43 | |
| 44 | void ProfilerEventsProcessor::AddDeoptStack(Isolate* isolate, Address from, |
| 45 | int fp_to_sp_delta) { |
| 46 | TickSampleEventRecord record(last_code_event_id_.Value()); |
| 47 | RegisterState regs; |
| 48 | Address fp = isolate->c_entry_fp(isolate->thread_local_top()); |
| 49 | regs.sp = fp - fp_to_sp_delta; |
| 50 | regs.fp = fp; |
| 51 | regs.pc = from; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 52 | record.sample.Init(isolate, regs, TickSample::kSkipCEntryFrame, false); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 53 | ticks_from_vm_buffer_.Enqueue(record); |
| 54 | } |
| 55 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 56 | void ProfilerEventsProcessor::AddCurrentStack(Isolate* isolate, |
| 57 | bool update_stats) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 58 | TickSampleEventRecord record(last_code_event_id_.Value()); |
| 59 | RegisterState regs; |
| 60 | StackFrameIterator it(isolate); |
| 61 | if (!it.done()) { |
| 62 | StackFrame* frame = it.frame(); |
| 63 | regs.sp = frame->sp(); |
| 64 | regs.fp = frame->fp(); |
| 65 | regs.pc = frame->pc(); |
| 66 | } |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 67 | record.sample.Init(isolate, regs, TickSample::kSkipCEntryFrame, update_stats); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 68 | ticks_from_vm_buffer_.Enqueue(record); |
| 69 | } |
| 70 | |
| 71 | |
| 72 | void ProfilerEventsProcessor::StopSynchronously() { |
| 73 | if (!base::NoBarrier_AtomicExchange(&running_, 0)) return; |
| 74 | Join(); |
| 75 | } |
| 76 | |
| 77 | |
| 78 | bool ProfilerEventsProcessor::ProcessCodeEvent() { |
| 79 | CodeEventsContainer record; |
| 80 | if (events_buffer_.Dequeue(&record)) { |
| 81 | switch (record.generic.type) { |
| 82 | #define PROFILER_TYPE_CASE(type, clss) \ |
| 83 | case CodeEventRecord::type: \ |
| 84 | record.clss##_.UpdateCodeMap(generator_->code_map()); \ |
| 85 | break; |
| 86 | |
| 87 | CODE_EVENTS_TYPE_LIST(PROFILER_TYPE_CASE) |
| 88 | |
| 89 | #undef PROFILER_TYPE_CASE |
| 90 | default: return true; // Skip record. |
| 91 | } |
| 92 | last_processed_code_event_id_ = record.generic.order; |
| 93 | return true; |
| 94 | } |
| 95 | return false; |
| 96 | } |
| 97 | |
| 98 | ProfilerEventsProcessor::SampleProcessingResult |
| 99 | ProfilerEventsProcessor::ProcessOneSample() { |
| 100 | TickSampleEventRecord record1; |
| 101 | if (ticks_from_vm_buffer_.Peek(&record1) && |
| 102 | (record1.order == last_processed_code_event_id_)) { |
| 103 | TickSampleEventRecord record; |
| 104 | ticks_from_vm_buffer_.Dequeue(&record); |
| 105 | generator_->RecordTickSample(record.sample); |
| 106 | return OneSampleProcessed; |
| 107 | } |
| 108 | |
| 109 | const TickSampleEventRecord* record = ticks_buffer_.Peek(); |
| 110 | if (record == NULL) { |
| 111 | if (ticks_from_vm_buffer_.IsEmpty()) return NoSamplesInQueue; |
| 112 | return FoundSampleForNextCodeEvent; |
| 113 | } |
| 114 | if (record->order != last_processed_code_event_id_) { |
| 115 | return FoundSampleForNextCodeEvent; |
| 116 | } |
| 117 | generator_->RecordTickSample(record->sample); |
| 118 | ticks_buffer_.Remove(); |
| 119 | return OneSampleProcessed; |
| 120 | } |
| 121 | |
| 122 | |
| 123 | void ProfilerEventsProcessor::Run() { |
| 124 | while (!!base::NoBarrier_Load(&running_)) { |
| 125 | base::TimeTicks nextSampleTime = |
| 126 | base::TimeTicks::HighResolutionNow() + period_; |
| 127 | base::TimeTicks now; |
| 128 | SampleProcessingResult result; |
| 129 | // Keep processing existing events until we need to do next sample |
| 130 | // or the ticks buffer is empty. |
| 131 | do { |
| 132 | result = ProcessOneSample(); |
| 133 | if (result == FoundSampleForNextCodeEvent) { |
| 134 | // All ticks of the current last_processed_code_event_id_ are |
| 135 | // processed, proceed to the next code event. |
| 136 | ProcessCodeEvent(); |
| 137 | } |
| 138 | now = base::TimeTicks::HighResolutionNow(); |
| 139 | } while (result != NoSamplesInQueue && now < nextSampleTime); |
| 140 | |
| 141 | if (nextSampleTime > now) { |
| 142 | #if V8_OS_WIN |
| 143 | // Do not use Sleep on Windows as it is very imprecise. |
| 144 | // Could be up to 16ms jitter, which is unacceptable for the purpose. |
| 145 | while (base::TimeTicks::HighResolutionNow() < nextSampleTime) { |
| 146 | } |
| 147 | #else |
| 148 | base::OS::Sleep(nextSampleTime - now); |
| 149 | #endif |
| 150 | } |
| 151 | |
| 152 | // Schedule next sample. sampler_ is NULL in tests. |
| 153 | if (sampler_) sampler_->DoSample(); |
| 154 | } |
| 155 | |
| 156 | // Process remaining tick events. |
| 157 | do { |
| 158 | SampleProcessingResult result; |
| 159 | do { |
| 160 | result = ProcessOneSample(); |
| 161 | } while (result == OneSampleProcessed); |
| 162 | } while (ProcessCodeEvent()); |
| 163 | } |
| 164 | |
| 165 | |
| 166 | void* ProfilerEventsProcessor::operator new(size_t size) { |
| 167 | return AlignedAlloc(size, V8_ALIGNOF(ProfilerEventsProcessor)); |
| 168 | } |
| 169 | |
| 170 | |
| 171 | void ProfilerEventsProcessor::operator delete(void* ptr) { |
| 172 | AlignedFree(ptr); |
| 173 | } |
| 174 | |
| 175 | |
| 176 | int CpuProfiler::GetProfilesCount() { |
| 177 | // The count of profiles doesn't depend on a security token. |
| 178 | return profiles_->profiles()->length(); |
| 179 | } |
| 180 | |
| 181 | |
| 182 | CpuProfile* CpuProfiler::GetProfile(int index) { |
| 183 | return profiles_->profiles()->at(index); |
| 184 | } |
| 185 | |
| 186 | |
| 187 | void CpuProfiler::DeleteAllProfiles() { |
| 188 | if (is_profiling_) StopProcessor(); |
| 189 | ResetProfiles(); |
| 190 | } |
| 191 | |
| 192 | |
| 193 | void CpuProfiler::DeleteProfile(CpuProfile* profile) { |
| 194 | profiles_->RemoveProfile(profile); |
| 195 | delete profile; |
| 196 | if (profiles_->profiles()->is_empty() && !is_profiling_) { |
| 197 | // If this was the last profile, clean up all accessory data as well. |
| 198 | ResetProfiles(); |
| 199 | } |
| 200 | } |
| 201 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 202 | void CpuProfiler::CodeEventHandler(const CodeEventsContainer& evt_rec) { |
| 203 | switch (evt_rec.generic.type) { |
| 204 | case CodeEventRecord::CODE_CREATION: |
| 205 | case CodeEventRecord::CODE_MOVE: |
| 206 | case CodeEventRecord::CODE_DISABLE_OPT: |
| 207 | processor_->Enqueue(evt_rec); |
| 208 | break; |
| 209 | case CodeEventRecord::CODE_DEOPT: { |
| 210 | const CodeDeoptEventRecord* rec = &evt_rec.CodeDeoptEventRecord_; |
| 211 | Address pc = reinterpret_cast<Address>(rec->pc); |
| 212 | int fp_to_sp_delta = rec->fp_to_sp_delta; |
| 213 | processor_->Enqueue(evt_rec); |
| 214 | processor_->AddDeoptStack(isolate_, pc, fp_to_sp_delta); |
| 215 | break; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 216 | } |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 217 | default: |
| 218 | UNREACHABLE(); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 219 | } |
| 220 | } |
| 221 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 222 | CpuProfiler::CpuProfiler(Isolate* isolate) |
| 223 | : isolate_(isolate), |
| 224 | sampling_interval_(base::TimeDelta::FromMicroseconds( |
| 225 | FLAG_cpu_profiler_sampling_interval)), |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 226 | profiles_(new CpuProfilesCollection(isolate)), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 227 | is_profiling_(false) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 228 | profiles_->set_cpu_profiler(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 229 | } |
| 230 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 231 | CpuProfiler::CpuProfiler(Isolate* isolate, CpuProfilesCollection* test_profiles, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 232 | ProfileGenerator* test_generator, |
| 233 | ProfilerEventsProcessor* test_processor) |
| 234 | : isolate_(isolate), |
| 235 | sampling_interval_(base::TimeDelta::FromMicroseconds( |
| 236 | FLAG_cpu_profiler_sampling_interval)), |
| 237 | profiles_(test_profiles), |
| 238 | generator_(test_generator), |
| 239 | processor_(test_processor), |
| 240 | is_profiling_(false) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 241 | profiles_->set_cpu_profiler(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 242 | } |
| 243 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 244 | CpuProfiler::~CpuProfiler() { |
| 245 | DCHECK(!is_profiling_); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 246 | } |
| 247 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 248 | void CpuProfiler::set_sampling_interval(base::TimeDelta value) { |
| 249 | DCHECK(!is_profiling_); |
| 250 | sampling_interval_ = value; |
| 251 | } |
| 252 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 253 | void CpuProfiler::ResetProfiles() { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 254 | profiles_.reset(new CpuProfilesCollection(isolate_)); |
| 255 | profiles_->set_cpu_profiler(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 256 | } |
| 257 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 258 | void CpuProfiler::CollectSample() { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 259 | if (processor_) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 260 | processor_->AddCurrentStack(isolate_); |
| 261 | } |
| 262 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 263 | |
| 264 | void CpuProfiler::StartProfiling(const char* title, bool record_samples) { |
| 265 | if (profiles_->StartProfiling(title, record_samples)) { |
| 266 | StartProcessorIfNotStarted(); |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | |
| 271 | void CpuProfiler::StartProfiling(String* title, bool record_samples) { |
| 272 | StartProfiling(profiles_->GetName(title), record_samples); |
| 273 | isolate_->debug()->feature_tracker()->Track(DebugFeatureTracker::kProfiler); |
| 274 | } |
| 275 | |
| 276 | |
| 277 | void CpuProfiler::StartProcessorIfNotStarted() { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 278 | if (processor_) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 279 | processor_->AddCurrentStack(isolate_); |
| 280 | return; |
| 281 | } |
| 282 | Logger* logger = isolate_->logger(); |
| 283 | // Disable logging when using the new implementation. |
| 284 | saved_is_logging_ = logger->is_logging_; |
| 285 | logger->is_logging_ = false; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 286 | sampler::Sampler* sampler = logger->sampler(); |
| 287 | generator_.reset(new ProfileGenerator(profiles_.get())); |
| 288 | processor_.reset(new ProfilerEventsProcessor(generator_.get(), sampler, |
| 289 | sampling_interval_)); |
| 290 | logger->SetUpProfilerListener(); |
| 291 | ProfilerListener* profiler_listener = logger->profiler_listener(); |
| 292 | profiler_listener->AddObserver(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 293 | is_profiling_ = true; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 294 | isolate_->set_is_profiling(true); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 295 | // Enumerate stuff we already have in the heap. |
| 296 | DCHECK(isolate_->heap()->HasBeenSetUp()); |
| 297 | if (!FLAG_prof_browser_mode) { |
| 298 | logger->LogCodeObjects(); |
| 299 | } |
| 300 | logger->LogCompiledFunctions(); |
| 301 | logger->LogAccessorCallbacks(); |
| 302 | LogBuiltins(); |
| 303 | // Enable stack sampling. |
| 304 | sampler->SetHasProcessingThread(true); |
| 305 | sampler->IncreaseProfilingDepth(); |
| 306 | processor_->AddCurrentStack(isolate_); |
| 307 | processor_->StartSynchronously(); |
| 308 | } |
| 309 | |
| 310 | |
| 311 | CpuProfile* CpuProfiler::StopProfiling(const char* title) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 312 | if (!is_profiling_) return nullptr; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 313 | StopProcessorIfLastProfile(title); |
| 314 | CpuProfile* result = profiles_->StopProfiling(title); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 315 | if (result) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 316 | result->Print(); |
| 317 | } |
| 318 | return result; |
| 319 | } |
| 320 | |
| 321 | |
| 322 | CpuProfile* CpuProfiler::StopProfiling(String* title) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 323 | if (!is_profiling_) return nullptr; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 324 | const char* profile_title = profiles_->GetName(title); |
| 325 | StopProcessorIfLastProfile(profile_title); |
| 326 | return profiles_->StopProfiling(profile_title); |
| 327 | } |
| 328 | |
| 329 | |
| 330 | void CpuProfiler::StopProcessorIfLastProfile(const char* title) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 331 | if (profiles_->IsLastProfile(title)) { |
| 332 | StopProcessor(); |
| 333 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 334 | } |
| 335 | |
| 336 | |
| 337 | void CpuProfiler::StopProcessor() { |
| 338 | Logger* logger = isolate_->logger(); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 339 | sampler::Sampler* sampler = |
| 340 | reinterpret_cast<sampler::Sampler*>(logger->ticker_); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 341 | is_profiling_ = false; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 342 | isolate_->set_is_profiling(false); |
| 343 | ProfilerListener* profiler_listener = logger->profiler_listener(); |
| 344 | profiler_listener->RemoveObserver(this); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 345 | processor_->StopSynchronously(); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 346 | logger->TearDownProfilerListener(); |
| 347 | processor_.reset(); |
| 348 | generator_.reset(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 349 | sampler->SetHasProcessingThread(false); |
| 350 | sampler->DecreaseProfilingDepth(); |
| 351 | logger->is_logging_ = saved_is_logging_; |
| 352 | } |
| 353 | |
| 354 | |
| 355 | void CpuProfiler::LogBuiltins() { |
| 356 | Builtins* builtins = isolate_->builtins(); |
| 357 | DCHECK(builtins->is_initialized()); |
| 358 | for (int i = 0; i < Builtins::builtin_count; i++) { |
| 359 | CodeEventsContainer evt_rec(CodeEventRecord::REPORT_BUILTIN); |
| 360 | ReportBuiltinEventRecord* rec = &evt_rec.ReportBuiltinEventRecord_; |
| 361 | Builtins::Name id = static_cast<Builtins::Name>(i); |
| 362 | rec->start = builtins->builtin(id)->address(); |
| 363 | rec->builtin_id = id; |
| 364 | processor_->Enqueue(evt_rec); |
| 365 | } |
| 366 | } |
| 367 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 368 | } // namespace internal |
| 369 | } // namespace v8 |