GCC Code Coverage Report
Directory: ../ Exec Total Coverage
File: /home/iojs/build/workspace/node-test-commit-linux-coverage-daily/nodes/benchmark/out/../src/node_platform.cc Lines: 330 338 97.6 %
Date: 2019-07-28 22:34:34 Branches: 78 108 72.2 %

Line Branch Exec Source
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#include "node_platform.h"
2
#include "node_internals.h"
3
4
#include "env-inl.h"
5
#include "debug_utils.h"
6
#include <algorithm>
7
#include <cmath>
8
#include <memory>
9
10
namespace node {
11
12
using v8::Isolate;
13
using v8::Local;
14
using v8::Object;
15
using v8::Platform;
16
using v8::Task;
17
using node::tracing::TracingController;
18
19
namespace {
20
21
struct PlatformWorkerData {
22
  TaskQueue<Task>* task_queue;
23
  Mutex* platform_workers_mutex;
24
  ConditionVariable* platform_workers_ready;
25
  int* pending_platform_workers;
26
  int id;
27
};
28
29
18823
static void PlatformWorkerThread(void* data) {
30
  std::unique_ptr<PlatformWorkerData>
31
18823
      worker_data(static_cast<PlatformWorkerData*>(data));
32
33
19028
  TaskQueue<Task>* pending_worker_tasks = worker_data->task_queue;
34

37935
  TRACE_EVENT_METADATA1("__metadata", "thread_name", "name",
35
                        "PlatformWorkerThread");
36
37
  // Notify the main thread that the platform worker is ready.
38
  {
39
18980
    Mutex::ScopedLock lock(*worker_data->platform_workers_mutex);
40
19082
    (*worker_data->pending_platform_workers)--;
41
19082
    worker_data->platform_workers_ready->Signal(lock);
42
  }
43
44
174012
  while (std::unique_ptr<Task> task = pending_worker_tasks->BlockingPop()) {
45
154694
    task->Run();
46
154776
    pending_worker_tasks->NotifyOfCompletion();
47
154937
  }
48
19066
}
49
50
}  // namespace
51
52
4765
class WorkerThreadsTaskRunner::DelayedTaskScheduler {
53
 public:
54
4769
  explicit DelayedTaskScheduler(TaskQueue<Task>* tasks)
55
4769
    : pending_worker_tasks_(tasks) {}
56
57
4769
  std::unique_ptr<uv_thread_t> Start() {
58
14307
    auto start_thread = [](void* data) {
59
4769
      static_cast<DelayedTaskScheduler*>(data)->Run();
60
14303
    };
61
4769
    std::unique_ptr<uv_thread_t> t { new uv_thread_t() };
62
4769
    uv_sem_init(&ready_, 0);
63
4769
    CHECK_EQ(0, uv_thread_create(t.get(), start_thread, this));
64
4769
    uv_sem_wait(&ready_);
65
4769
    uv_sem_destroy(&ready_);
66
4769
    return t;
67
  }
68
69
1
  void PostDelayedTask(std::unique_ptr<Task> task, double delay_in_seconds) {
70
1
    tasks_.Push(std::unique_ptr<Task>(new ScheduleTask(this, std::move(task),
71
1
                                                       delay_in_seconds)));
72
1
    uv_async_send(&flush_tasks_);
73
1
  }
74
75
4765
  void Stop() {
76
4765
    tasks_.Push(std::unique_ptr<Task>(new StopTask(this)));
77
4765
    uv_async_send(&flush_tasks_);
78
4765
  }
79
80
 private:
81
4769
  void Run() {
82

9538
    TRACE_EVENT_METADATA1("__metadata", "thread_name", "name",
83
                          "WorkerThreadsTaskRunner::DelayedTaskScheduler");
84
4769
    loop_.data = this;
85
4769
    CHECK_EQ(0, uv_loop_init(&loop_));
86
4769
    flush_tasks_.data = this;
87
4769
    CHECK_EQ(0, uv_async_init(&loop_, &flush_tasks_, FlushTasks));
88
4769
    uv_sem_post(&ready_);
89
90
4769
    uv_run(&loop_, UV_RUN_DEFAULT);
91
4765
    CheckedUvLoopClose(&loop_);
92
4765
  }
93
94
4766
  static void FlushTasks(uv_async_t* flush_tasks) {
95
    DelayedTaskScheduler* scheduler =
96
4766
        ContainerOf(&DelayedTaskScheduler::loop_, flush_tasks->loop);
97
9532
    while (std::unique_ptr<Task> task = scheduler->tasks_.Pop())
98
4766
      task->Run();
99
4766
  }
100
101
9530
  class StopTask : public Task {
102
   public:
103
4765
    explicit StopTask(DelayedTaskScheduler* scheduler): scheduler_(scheduler) {}
104
105
4765
    void Run() override {
106
4765
      std::vector<uv_timer_t*> timers;
107
4765
      for (uv_timer_t* timer : scheduler_->timers_)
108
        timers.push_back(timer);
109
4765
      for (uv_timer_t* timer : timers)
110
        scheduler_->TakeTimerTask(timer);
111
      uv_close(reinterpret_cast<uv_handle_t*>(&scheduler_->flush_tasks_),
112
19060
               [](uv_handle_t* handle) {});
113
4765
    }
114
115
   private:
116
     DelayedTaskScheduler* scheduler_;
117
  };
118
119
2
  class ScheduleTask : public Task {
120
   public:
121
1
    ScheduleTask(DelayedTaskScheduler* scheduler,
122
                 std::unique_ptr<Task> task,
123
                 double delay_in_seconds)
124
      : scheduler_(scheduler),
125
1
        task_(std::move(task)),
126
2
        delay_in_seconds_(delay_in_seconds) {}
127
128
1
    void Run() override {
129
1
      uint64_t delay_millis = llround(delay_in_seconds_ * 1000);
130
1
      std::unique_ptr<uv_timer_t> timer(new uv_timer_t());
131
1
      CHECK_EQ(0, uv_timer_init(&scheduler_->loop_, timer.get()));
132
1
      timer->data = task_.release();
133
1
      CHECK_EQ(0, uv_timer_start(timer.get(), RunTask, delay_millis, 0));
134
1
      scheduler_->timers_.insert(timer.release());
135
1
    }
136
137
   private:
138
    DelayedTaskScheduler* scheduler_;
139
    std::unique_ptr<Task> task_;
140
    double delay_in_seconds_;
141
  };
142
143
1
  static void RunTask(uv_timer_t* timer) {
144
    DelayedTaskScheduler* scheduler =
145
1
        ContainerOf(&DelayedTaskScheduler::loop_, timer->loop);
146
1
    scheduler->pending_worker_tasks_->Push(scheduler->TakeTimerTask(timer));
147
1
  }
148
149
1
  std::unique_ptr<Task> TakeTimerTask(uv_timer_t* timer) {
150
1
    std::unique_ptr<Task> task(static_cast<Task*>(timer->data));
151
1
    uv_timer_stop(timer);
152
3
    uv_close(reinterpret_cast<uv_handle_t*>(timer), [](uv_handle_t* handle) {
153
1
      delete reinterpret_cast<uv_timer_t*>(handle);
154
4
    });
155
1
    timers_.erase(timer);
156
1
    return task;
157
  }
158
159
  uv_sem_t ready_;
160
  TaskQueue<Task>* pending_worker_tasks_;
161
162
  TaskQueue<Task> tasks_;
163
  uv_loop_t loop_;
164
  uv_async_t flush_tasks_;
165
  std::unordered_set<uv_timer_t*> timers_;
166
};
167
168
4769
WorkerThreadsTaskRunner::WorkerThreadsTaskRunner(int thread_pool_size) {
169
4769
  Mutex platform_workers_mutex;
170
9538
  ConditionVariable platform_workers_ready;
171
172
9538
  Mutex::ScopedLock lock(platform_workers_mutex);
173
4769
  int pending_platform_workers = thread_pool_size;
174
175
9538
  delayed_task_scheduler_ = std::make_unique<DelayedTaskScheduler>(
176
4769
      &pending_worker_tasks_);
177
4769
  threads_.push_back(delayed_task_scheduler_->Start());
178
179
23851
  for (int i = 0; i < thread_pool_size; i++) {
180
    PlatformWorkerData* worker_data = new PlatformWorkerData{
181
      &pending_worker_tasks_, &platform_workers_mutex,
182
      &platform_workers_ready, &pending_platform_workers, i
183
19082
    };
184
19082
    std::unique_ptr<uv_thread_t> t { new uv_thread_t() };
185
19082
    if (uv_thread_create(t.get(), PlatformWorkerThread,
186
19082
                         worker_data) != 0) {
187
      break;
188
    }
189
19082
    threads_.push_back(std::move(t));
190
19082
  }
191
192
  // Wait for platform workers to initialize before continuing with the
193
  // bootstrap.
194
25697
  while (pending_platform_workers > 0) {
195
16159
    platform_workers_ready.Wait(lock);
196
4769
  }
197
4769
}
198
199
154975
void WorkerThreadsTaskRunner::PostTask(std::unique_ptr<Task> task) {
200
154975
  pending_worker_tasks_.Push(std::move(task));
201
154976
}
202
203
1
void WorkerThreadsTaskRunner::PostDelayedTask(std::unique_ptr<Task> task,
204
                                              double delay_in_seconds) {
205
1
  delayed_task_scheduler_->PostDelayedTask(std::move(task), delay_in_seconds);
206
1
}
207
208
11313
void WorkerThreadsTaskRunner::BlockingDrain() {
209
11313
  pending_worker_tasks_.BlockingDrain();
210
11313
}
211
212
4765
void WorkerThreadsTaskRunner::Shutdown() {
213
4765
  pending_worker_tasks_.Stop();
214
4765
  delayed_task_scheduler_->Stop();
215
28596
  for (size_t i = 0; i < threads_.size(); i++) {
216
23831
    CHECK_EQ(0, uv_thread_join(threads_[i].get()));
217
  }
218
4765
}
219
220
5263
int WorkerThreadsTaskRunner::NumberOfWorkerThreads() const {
221
5263
  return threads_.size();
222
}
223
224
4974
PerIsolatePlatformData::PerIsolatePlatformData(
225
    Isolate* isolate, uv_loop_t* loop)
226
4974
  : loop_(loop) {
227
4974
  flush_tasks_ = new uv_async_t();
228
4974
  CHECK_EQ(0, uv_async_init(loop, flush_tasks_, FlushTasks));
229
4974
  flush_tasks_->data = static_cast<void*>(this);
230
4974
  uv_unref(reinterpret_cast<uv_handle_t*>(flush_tasks_));
231
4974
}
232
233
6209
void PerIsolatePlatformData::FlushTasks(uv_async_t* handle) {
234
6209
  auto platform_data = static_cast<PerIsolatePlatformData*>(handle->data);
235
6209
  platform_data->FlushForegroundTasksInternal();
236
6208
}
237
238
void PerIsolatePlatformData::PostIdleTask(std::unique_ptr<v8::IdleTask> task) {
239
  UNREACHABLE();
240
}
241
242
7245
void PerIsolatePlatformData::PostTask(std::unique_ptr<Task> task) {
243
7245
  CHECK_NOT_NULL(flush_tasks_);
244
7245
  foreground_tasks_.Push(std::move(task));
245
7245
  uv_async_send(flush_tasks_);
246
7245
}
247
248
5018
void PerIsolatePlatformData::PostDelayedTask(
249
    std::unique_ptr<Task> task, double delay_in_seconds) {
250
5018
  CHECK_NOT_NULL(flush_tasks_);
251
5018
  std::unique_ptr<DelayedTask> delayed(new DelayedTask());
252
5018
  delayed->task = std::move(task);
253
5018
  delayed->platform_data = shared_from_this();
254
5018
  delayed->timeout = delay_in_seconds;
255
5018
  foreground_delayed_tasks_.Push(std::move(delayed));
256
5018
  uv_async_send(flush_tasks_);
257
5018
}
258
259
422
void PerIsolatePlatformData::PostNonNestableTask(std::unique_ptr<Task> task) {
260
422
  PostTask(std::move(task));
261
422
}
262
263
170
void PerIsolatePlatformData::PostNonNestableDelayedTask(
264
    std::unique_ptr<Task> task,
265
    double delay_in_seconds) {
266
170
  PostDelayedTask(std::move(task), delay_in_seconds);
267
170
}
268
269
572
PerIsolatePlatformData::~PerIsolatePlatformData() {
270
286
  Shutdown();
271
285
}
272
273
205
void PerIsolatePlatformData::AddShutdownCallback(void (*callback)(void*),
274
                                                 void* data) {
275
205
  shutdown_callbacks_.emplace_back(ShutdownCallback { callback, data });
276
205
}
277
278
4865
void PerIsolatePlatformData::Shutdown() {
279
4865
  if (flush_tasks_ == nullptr)
280
5151
    return;
281
282
4579
  CHECK_NULL(foreground_delayed_tasks_.Pop());
283
4579
  CHECK_NULL(foreground_tasks_.Pop());
284
4579
  CancelPendingDelayedTasks();
285
286
4579
  ShutdownCbList* copy = new ShutdownCbList(std::move(shutdown_callbacks_));
287
4579
  flush_tasks_->data = copy;
288
  uv_close(reinterpret_cast<uv_handle_t*>(flush_tasks_),
289
4989
           [](uv_handle_t* handle) {
290
    std::unique_ptr<ShutdownCbList> callbacks(
291
205
        static_cast<ShutdownCbList*>(handle->data));
292
410
    for (const auto& callback : *callbacks)
293
205
      callback.cb(callback.data);
294
205
    delete reinterpret_cast<uv_async_t*>(handle);
295
9568
  });
296
4579
  flush_tasks_ = nullptr;
297
}
298
299
4769
NodePlatform::NodePlatform(int thread_pool_size,
300
4769
                           TracingController* tracing_controller) {
301
4769
  if (tracing_controller) {
302
4769
    tracing_controller_ = tracing_controller;
303
  } else {
304
    tracing_controller_ = new TracingController();
305
  }
306
9538
  worker_thread_task_runner_ =
307
4769
      std::make_shared<WorkerThreadsTaskRunner>(thread_pool_size);
308
4769
}
309
310
4974
void NodePlatform::RegisterIsolate(Isolate* isolate, uv_loop_t* loop) {
311
4974
  Mutex::ScopedLock lock(per_isolate_mutex_);
312
9948
  std::shared_ptr<PerIsolatePlatformData> existing = per_isolate_[isolate];
313
4974
  CHECK(!existing);
314
9948
  per_isolate_[isolate] =
315
9948
      std::make_shared<PerIsolatePlatformData>(isolate, loop);
316
4974
}
317
318
4579
void NodePlatform::UnregisterIsolate(Isolate* isolate) {
319
4579
  Mutex::ScopedLock lock(per_isolate_mutex_);
320
9158
  std::shared_ptr<PerIsolatePlatformData> existing = per_isolate_[isolate];
321
4579
  CHECK(existing);
322
4579
  existing->Shutdown();
323
9158
  per_isolate_.erase(isolate);
324
4579
}
325
326
205
void NodePlatform::AddIsolateFinishedCallback(Isolate* isolate,
327
                                              void (*cb)(void*), void* data) {
328
205
  Mutex::ScopedLock lock(per_isolate_mutex_);
329
205
  auto it = per_isolate_.find(isolate);
330
205
  if (it == per_isolate_.end()) {
331
    CHECK(it->second);
332
    cb(data);
333
205
    return;
334
  }
335
205
  it->second->AddShutdownCallback(cb, data);
336
}
337
338
4765
void NodePlatform::Shutdown() {
339
4765
  worker_thread_task_runner_->Shutdown();
340
341
  {
342
4765
    Mutex::ScopedLock lock(per_isolate_mutex_);
343
4765
    per_isolate_.clear();
344
  }
345
4765
}
346
347
5263
int NodePlatform::NumberOfWorkerThreads() {
348
5263
  return worker_thread_task_runner_->NumberOfWorkerThreads();
349
}
350
351
7179
void PerIsolatePlatformData::RunForegroundTask(std::unique_ptr<Task> task) {
352
7179
  Isolate* isolate = Isolate::GetCurrent();
353
7179
  DebugSealHandleScope scope(isolate);
354
7179
  Environment* env = Environment::GetCurrent(isolate);
355
7179
  if (env != nullptr) {
356
    InternalCallbackScope cb_scope(env, Local<Object>(), { 0, 0 },
357
14356
                                   InternalCallbackScope::kAllowEmptyResource);
358
7178
    task->Run();
359
  } else {
360
1
    task->Run();
361
  }
362
7178
}
363
364
201
void PerIsolatePlatformData::DeleteFromScheduledTasks(DelayedTask* task) {
365
  auto it = std::find_if(scheduled_delayed_tasks_.begin(),
366
                         scheduled_delayed_tasks_.end(),
367
333
                         [task](const DelayedTaskPointer& delayed) -> bool {
368
333
          return delayed.get() == task;
369
201
      });
370
201
  CHECK_NE(it, scheduled_delayed_tasks_.end());
371
201
  scheduled_delayed_tasks_.erase(it);
372
201
}
373
374
201
void PerIsolatePlatformData::RunForegroundTask(uv_timer_t* handle) {
375
201
  DelayedTask* delayed = static_cast<DelayedTask*>(handle->data);
376
201
  RunForegroundTask(std::move(delayed->task));
377
201
  delayed->platform_data->DeleteFromScheduledTasks(delayed);
378
201
}
379
380
9157
void PerIsolatePlatformData::CancelPendingDelayedTasks() {
381
9157
  scheduled_delayed_tasks_.clear();
382
9157
}
383
384
9103
void NodePlatform::DrainTasks(Isolate* isolate) {
385
9103
  std::shared_ptr<PerIsolatePlatformData> per_isolate = ForIsolate(isolate);
386
387
11313
  do {
388
    // Worker tasks aren't associated with an Isolate.
389
11313
    worker_thread_task_runner_->BlockingDrain();
390
20416
  } while (per_isolate->FlushForegroundTasksInternal());
391
9103
}
392
393
17814
bool PerIsolatePlatformData::FlushForegroundTasksInternal() {
394
17814
  bool did_work = false;
395
396
  while (std::unique_ptr<DelayedTask> delayed =
397
22650
      foreground_delayed_tasks_.Pop()) {
398
4836
    did_work = true;
399
4836
    uint64_t delay_millis = llround(delayed->timeout * 1000);
400
401
4836
    delayed->timer.data = static_cast<void*>(delayed.get());
402
4836
    uv_timer_init(loop_, &delayed->timer);
403
    // Timers may not guarantee queue ordering of events with the same delay if
404
    // the delay is non-zero. This should not be a problem in practice.
405
4836
    uv_timer_start(&delayed->timer, RunForegroundTask, delay_millis, 0);
406
4836
    uv_unref(reinterpret_cast<uv_handle_t*>(&delayed->timer));
407
408
4836
    scheduled_delayed_tasks_.emplace_back(delayed.release(),
409
4689
                                          [](DelayedTask* delayed) {
410
      uv_close(reinterpret_cast<uv_handle_t*>(&delayed->timer),
411
5475
               [](uv_handle_t* handle) {
412
393
        delete static_cast<DelayedTask*>(handle->data);
413
10164
      });
414
9525
    });
415
4836
  }
416
  // Move all foreground tasks into a separate queue and flush that queue.
417
  // This way tasks that are posted while flushing the queue will be run on the
418
  // next call of FlushForegroundTasksInternal.
419
17814
  std::queue<std::unique_ptr<Task>> tasks = foreground_tasks_.PopAll();
420
42605
  while (!tasks.empty()) {
421
6978
    std::unique_ptr<Task> task = std::move(tasks.front());
422
6978
    tasks.pop();
423
6978
    did_work = true;
424
6978
    RunForegroundTask(std::move(task));
425
6977
  }
426
22649
  return did_work;
427
}
428
429
154976
void NodePlatform::CallOnWorkerThread(std::unique_ptr<Task> task) {
430
154976
  worker_thread_task_runner_->PostTask(std::move(task));
431
154976
}
432
433
1
void NodePlatform::CallDelayedOnWorkerThread(std::unique_ptr<Task> task,
434
                                             double delay_in_seconds) {
435
1
  worker_thread_task_runner_->PostDelayedTask(std::move(task),
436
1
                                              delay_in_seconds);
437
1
}
438
439
440
std::shared_ptr<PerIsolatePlatformData>
441
36307
NodePlatform::ForIsolate(Isolate* isolate) {
442
36307
  Mutex::ScopedLock lock(per_isolate_mutex_);
443
36308
  std::shared_ptr<PerIsolatePlatformData> data = per_isolate_[isolate];
444
36308
  CHECK(data);
445
36308
  return data;
446
}
447
448
292
bool NodePlatform::FlushForegroundTasks(Isolate* isolate) {
449
292
  return ForIsolate(isolate)->FlushForegroundTasksInternal();
450
}
451
452
4577
void NodePlatform::CancelPendingDelayedTasks(Isolate* isolate) {
453
4577
  ForIsolate(isolate)->CancelPendingDelayedTasks();
454
4578
}
455
456
43467
bool NodePlatform::IdleTasksEnabled(Isolate* isolate) { return false; }
457
458
std::shared_ptr<v8::TaskRunner>
459
22333
NodePlatform::GetForegroundTaskRunner(Isolate* isolate) {
460
22333
  return ForIsolate(isolate);
461
}
462
463
1748478
double NodePlatform::MonotonicallyIncreasingTime() {
464
  // Convert nanos to seconds.
465
1748478
  return uv_hrtime() / 1e9;
466
}
467
468
98749146
double NodePlatform::CurrentClockTimeMillis() {
469
98749146
  return SystemClockTimeMillis();
470
}
471
472
265226
TracingController* NodePlatform::GetTracingController() {
473
265226
  CHECK_NOT_NULL(tracing_controller_);
474
265226
  return tracing_controller_;
475
}
476
477
template <class T>
478
19486
TaskQueue<T>::TaskQueue()
479
    : lock_(), tasks_available_(), tasks_drained_(),
480
19486
      outstanding_tasks_(0), stopped_(false), task_queue_() { }
481
482
template <class T>
483
172005
void TaskQueue<T>::Push(std::unique_ptr<T> task) {
484
172005
  Mutex::ScopedLock scoped_lock(lock_);
485
172006
  outstanding_tasks_++;
486
172006
  task_queue_.push(std::move(task));
487
172006
  tasks_available_.Signal(scoped_lock);
488
172006
}
489
490
template <class T>
491
41340
std::unique_ptr<T> TaskQueue<T>::Pop() {
492
41340
  Mutex::ScopedLock scoped_lock(lock_);
493

41340
  if (task_queue_.empty()) {
494
31738
    return std::unique_ptr<T>(nullptr);
495
  }
496
19204
  std::unique_ptr<T> result = std::move(task_queue_.front());
497
9602
  task_queue_.pop();
498
50942
  return result;
499
}
500
501
template <class T>
502
174006
std::unique_ptr<T> TaskQueue<T>::BlockingPop() {
503
174006
  Mutex::ScopedLock scoped_lock(lock_);
504

500526
  while (task_queue_.empty() && !stopped_) {
505
152424
    tasks_available_.Wait(scoped_lock);
506
  }
507
174043
  if (stopped_) {
508
19066
    return std::unique_ptr<T>(nullptr);
509
  }
510
309954
  std::unique_ptr<T> result = std::move(task_queue_.front());
511
154977
  task_queue_.pop();
512
329020
  return result;
513
}
514
515
template <class T>
516
154762
void TaskQueue<T>::NotifyOfCompletion() {
517
154762
  Mutex::ScopedLock scoped_lock(lock_);
518
154977
  if (--outstanding_tasks_ == 0) {
519
96660
    tasks_drained_.Broadcast(scoped_lock);
520
154977
  }
521
154915
}
522
523
template <class T>
524
11313
void TaskQueue<T>::BlockingDrain() {
525
11313
  Mutex::ScopedLock scoped_lock(lock_);
526
22786
  while (outstanding_tasks_ > 0) {
527
160
    tasks_drained_.Wait(scoped_lock);
528
11313
  }
529
11313
}
530
531
template <class T>
532
4765
void TaskQueue<T>::Stop() {
533
4765
  Mutex::ScopedLock scoped_lock(lock_);
534
4765
  stopped_ = true;
535
4765
  tasks_available_.Broadcast(scoped_lock);
536
4765
}
537
538
template <class T>
539
17814
std::queue<std::unique_ptr<T>> TaskQueue<T>::PopAll() {
540
17814
  Mutex::ScopedLock scoped_lock(lock_);
541
17814
  std::queue<std::unique_ptr<T>> result;
542
17814
  result.swap(task_queue_);
543
17814
  return result;
544
}
545
546
}  // namespace node