summaryrefslogtreecommitdiff
path: root/dom/performance/Performance.cpp
blob: 020dc0d89a1b9e76803378ba398c4cec5a0a0632 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "Performance.h"

#include "GeckoProfiler.h"
#include "PerformanceEntry.h"
#include "PerformanceMainThread.h"
#include "PerformanceMark.h"
#include "PerformanceMeasure.h"
#include "PerformanceObserver.h"
#include "PerformanceResourceTiming.h"
#include "PerformanceService.h"
#include "PerformanceWorker.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/dom/PerformanceBinding.h"
#include "mozilla/dom/PerformanceEntryEvent.h"
#include "mozilla/dom/PerformanceNavigationBinding.h"
#include "mozilla/dom/PerformanceObserverBinding.h"
#include "mozilla/dom/PerformanceNavigationTiming.h"
#include "mozilla/IntegerPrintfMacros.h"
#include "mozilla/Preferences.h"
#include "mozilla/TimerClamping.h"
#include "WorkerPrivate.h"
#include "WorkerRunnable.h"

#define PERFLOG(msg, ...) printf_stderr(msg, ##__VA_ARGS__)

namespace mozilla {
namespace dom {

using namespace workers;

namespace {

class PrefEnabledRunnable final
  : public WorkerCheckAPIExposureOnMainThreadRunnable
{
public:
  PrefEnabledRunnable(WorkerPrivate* aWorkerPrivate,
                      const nsCString& aPrefName)
    : WorkerCheckAPIExposureOnMainThreadRunnable(aWorkerPrivate)
    , mEnabled(false)
    , mPrefName(aPrefName)
  { }

  bool MainThreadRun() override
  {
    MOZ_ASSERT(NS_IsMainThread());
    mEnabled = Preferences::GetBool(mPrefName.get(), false);
    return true;
  }

  bool IsEnabled() const
  {
    return mEnabled;
  }

private:
  bool mEnabled;
  nsCString mPrefName;
};

} // anonymous namespace

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(Performance)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)

NS_IMPL_CYCLE_COLLECTION_INHERITED(Performance,
                                   DOMEventTargetHelper,
                                   mUserEntries,
                                   mResourceEntries);

NS_IMPL_ADDREF_INHERITED(Performance, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(Performance, DOMEventTargetHelper)

/* static */ already_AddRefed<Performance>
Performance::CreateForMainThread(nsPIDOMWindowInner* aWindow,
                                 nsDOMNavigationTiming* aDOMTiming,
                                 nsITimedChannel* aChannel)
{
  MOZ_ASSERT(NS_IsMainThread());

  RefPtr<Performance> performance =
    new PerformanceMainThread(aWindow, aDOMTiming, aChannel);
  return performance.forget();
}

/* static */ already_AddRefed<Performance>
Performance::CreateForWorker(workers::WorkerPrivate* aWorkerPrivate)
{
  MOZ_ASSERT(aWorkerPrivate);
  aWorkerPrivate->AssertIsOnWorkerThread();

  RefPtr<Performance> performance = new PerformanceWorker(aWorkerPrivate);
  return performance.forget();
}

Performance::Performance()
  : mResourceTimingBufferSize(kDefaultResourceTimingBufferSize)
  , mPendingNotificationObserversTask(false)
{
  MOZ_ASSERT(!NS_IsMainThread());
}

Performance::Performance(nsPIDOMWindowInner* aWindow)
  : DOMEventTargetHelper(aWindow)
  , mResourceTimingBufferSize(kDefaultResourceTimingBufferSize)
  , mPendingNotificationObserversTask(false)
{
  MOZ_ASSERT(NS_IsMainThread());
}

Performance::~Performance()
{}

DOMHighResTimeStamp
Performance::Now() const
{
  TimeDuration duration = TimeStamp::Now() - CreationTimeStamp();
  return RoundTime(duration.ToMilliseconds());
}

DOMHighResTimeStamp
Performance::TimeOrigin()
{
  if (!mPerformanceService) {
    mPerformanceService = PerformanceService::GetOrCreate();
  }

  MOZ_ASSERT(mPerformanceService);
  return mPerformanceService->TimeOrigin(CreationTimeStamp());
}

JSObject*
Performance::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
  return PerformanceBinding::Wrap(aCx, this, aGivenProto);
}

void
Performance::GetEntries(nsTArray<RefPtr<PerformanceEntry>>& aRetval)
{
  aRetval = mResourceEntries;
  aRetval.AppendElements(mUserEntries);
  aRetval.Sort(PerformanceEntryComparator());
}

void
Performance::GetEntriesByType(const nsAString& aEntryType,
                              nsTArray<RefPtr<PerformanceEntry>>& aRetval)
{
  if (aEntryType.EqualsLiteral("resource")) {
    aRetval = mResourceEntries;
    return;
  }

  aRetval.Clear();

  if (aEntryType.EqualsLiteral("mark") ||
      aEntryType.EqualsLiteral("measure")) {
    for (PerformanceEntry* entry : mUserEntries) {
      if (entry->GetEntryType().Equals(aEntryType)) {
        aRetval.AppendElement(entry);
      }
    }
  }
}

void
Performance::GetEntriesByName(const nsAString& aName,
                              const Optional<nsAString>& aEntryType,
                              nsTArray<RefPtr<PerformanceEntry>>& aRetval)
{
  aRetval.Clear();

  for (PerformanceEntry* entry : mResourceEntries) {
    if (entry->GetName().Equals(aName) &&
        (!aEntryType.WasPassed() ||
         entry->GetEntryType().Equals(aEntryType.Value()))) {
      aRetval.AppendElement(entry);
    }
  }

  for (PerformanceEntry* entry : mUserEntries) {
    if (entry->GetName().Equals(aName) &&
        (!aEntryType.WasPassed() ||
         entry->GetEntryType().Equals(aEntryType.Value()))) {
      aRetval.AppendElement(entry);
    }
  }

  aRetval.Sort(PerformanceEntryComparator());
}

void
Performance::ClearUserEntries(const Optional<nsAString>& aEntryName,
                              const nsAString& aEntryType)
{
  for (uint32_t i = 0; i < mUserEntries.Length();) {
    if ((!aEntryName.WasPassed() ||
         mUserEntries[i]->GetName().Equals(aEntryName.Value())) &&
        (aEntryType.IsEmpty() ||
         mUserEntries[i]->GetEntryType().Equals(aEntryType))) {
      mUserEntries.RemoveElementAt(i);
    } else {
      ++i;
    }
  }
}

void
Performance::ClearResourceTimings()
{
  MOZ_ASSERT(NS_IsMainThread());
  mResourceEntries.Clear();
}

DOMHighResTimeStamp
Performance::RoundTime(double aTime) const
{
  // Round down to the nearest 2ms, because if the timer is too accurate people
  // can do nasty timing attacks with it.
  const double maxResolutionMs = 2;
  return floor(aTime / maxResolutionMs) * maxResolutionMs;
}


void
Performance::Mark(const nsAString& aName, ErrorResult& aRv)
{
  // Don't add the entry if the buffer is full. XXX should be removed by bug 1159003.
  if (mUserEntries.Length() >= mResourceTimingBufferSize) {
    return;
  }

  if (IsPerformanceTimingAttribute(aName)) {
    aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
    return;
  }

  RefPtr<PerformanceMark> performanceMark =
    new PerformanceMark(GetAsISupports(), aName, Now());
  InsertUserEntry(performanceMark);

  if (profiler_is_active()) {
    PROFILER_MARKER(NS_ConvertUTF16toUTF8(aName).get());
  }
}

void
Performance::ClearMarks(const Optional<nsAString>& aName)
{
  ClearUserEntries(aName, NS_LITERAL_STRING("mark"));
}

DOMHighResTimeStamp
Performance::ResolveTimestampFromName(const nsAString& aName,
                                      ErrorResult& aRv)
{
  AutoTArray<RefPtr<PerformanceEntry>, 1> arr;
  DOMHighResTimeStamp ts;
  Optional<nsAString> typeParam;
  nsAutoString str;
  str.AssignLiteral("mark");
  typeParam = &str;
  GetEntriesByName(aName, typeParam, arr);
  if (!arr.IsEmpty()) {
    return arr.LastElement()->StartTime();
  }

  if (!IsPerformanceTimingAttribute(aName)) {
    aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
    return 0;
  }

  ts = GetPerformanceTimingFromString(aName);
  if (!ts) {
    aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
    return 0;
  }

  return ts - CreationTime();
}

void
Performance::Measure(const nsAString& aName,
                     const Optional<nsAString>& aStartMark,
                     const Optional<nsAString>& aEndMark,
                     ErrorResult& aRv)
{
  // Don't add the entry if the buffer is full. XXX should be removed by bug
  // 1159003.
  if (mUserEntries.Length() >= mResourceTimingBufferSize) {
    return;
  }

  DOMHighResTimeStamp startTime;
  DOMHighResTimeStamp endTime;

  if (IsPerformanceTimingAttribute(aName)) {
    aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
    return;
  }

  if (aStartMark.WasPassed()) {
    startTime = ResolveTimestampFromName(aStartMark.Value(), aRv);
    if (NS_WARN_IF(aRv.Failed())) {
      return;
    }
  } else {
    // Navigation start is used in this case, but since DOMHighResTimeStamp is
    // in relation to navigation start, this will be zero if a name is not
    // passed.
    startTime = 0;
  }

  if (aEndMark.WasPassed()) {
    endTime = ResolveTimestampFromName(aEndMark.Value(), aRv);
    if (NS_WARN_IF(aRv.Failed())) {
      return;
    }
  } else {
    endTime = Now();
  }

  RefPtr<PerformanceMeasure> performanceMeasure =
    new PerformanceMeasure(GetAsISupports(), aName, startTime, endTime);
  InsertUserEntry(performanceMeasure);
}

void
Performance::ClearMeasures(const Optional<nsAString>& aName)
{
  ClearUserEntries(aName, NS_LITERAL_STRING("measure"));
}

void
Performance::LogEntry(PerformanceEntry* aEntry, const nsACString& aOwner) const
{
  PERFLOG("Performance Entry: %s|%s|%s|%f|%f|%" PRIu64 "\n",
          aOwner.BeginReading(),
          NS_ConvertUTF16toUTF8(aEntry->GetEntryType()).get(),
          NS_ConvertUTF16toUTF8(aEntry->GetName()).get(),
          aEntry->StartTime(),
          aEntry->Duration(),
          static_cast<uint64_t>(PR_Now() / PR_USEC_PER_MSEC));
}

void
Performance::TimingNotification(PerformanceEntry* aEntry,
                                const nsACString& aOwner, uint64_t aEpoch)
{
  PerformanceEntryEventInit init;
  init.mBubbles = false;
  init.mCancelable = false;
  init.mName = aEntry->GetName();
  init.mEntryType = aEntry->GetEntryType();
  init.mStartTime = aEntry->StartTime();
  init.mDuration = aEntry->Duration();
  init.mEpoch = aEpoch;
  init.mOrigin = NS_ConvertUTF8toUTF16(aOwner.BeginReading());

  RefPtr<PerformanceEntryEvent> perfEntryEvent =
    PerformanceEntryEvent::Constructor(this, NS_LITERAL_STRING("performanceentry"), init);

  nsCOMPtr<EventTarget> et = do_QueryInterface(GetOwner());
  if (et) {
    bool dummy = false;
    et->DispatchEvent(perfEntryEvent, &dummy);
  }
}

void
Performance::InsertUserEntry(PerformanceEntry* aEntry)
{
  mUserEntries.InsertElementSorted(aEntry,
                                   PerformanceEntryComparator());

  QueueEntry(aEntry);
}

void
Performance::SetResourceTimingBufferSize(uint64_t aMaxSize)
{
  mResourceTimingBufferSize = aMaxSize;
}

void
Performance::InsertResourceEntry(PerformanceEntry* aEntry)
{
  MOZ_ASSERT(aEntry);
  MOZ_ASSERT(mResourceEntries.Length() < mResourceTimingBufferSize);
  if (mResourceEntries.Length() >= mResourceTimingBufferSize) {
    return;
  }

  mResourceEntries.InsertElementSorted(aEntry,
                                       PerformanceEntryComparator());
  if (mResourceEntries.Length() == mResourceTimingBufferSize) {
    // call onresourcetimingbufferfull
    DispatchBufferFullEvent();
  }
  QueueEntry(aEntry);
}

void
Performance::AddObserver(PerformanceObserver* aObserver)
{
  mObservers.AppendElementUnlessExists(aObserver);
}

void
Performance::RemoveObserver(PerformanceObserver* aObserver)
{
  mObservers.RemoveElement(aObserver);
}

void
Performance::NotifyObservers()
{
  mPendingNotificationObserversTask = false;
  NS_OBSERVER_ARRAY_NOTIFY_XPCOM_OBSERVERS(mObservers,
                                           PerformanceObserver,
                                           Notify, ());
}

void
Performance::CancelNotificationObservers()
{
  mPendingNotificationObserversTask = false;
}

class NotifyObserversTask final : public CancelableRunnable
{
public:
  explicit NotifyObserversTask(Performance* aPerformance)
    : mPerformance(aPerformance)
  {
    MOZ_ASSERT(mPerformance);
  }

  NS_IMETHOD Run() override
  {
    MOZ_ASSERT(mPerformance);
    mPerformance->NotifyObservers();
    return NS_OK;
  }

  nsresult Cancel() override
  {
    mPerformance->CancelNotificationObservers();
    mPerformance = nullptr;
    return NS_OK;
  }

private:
  ~NotifyObserversTask()
  {
  }

  RefPtr<Performance> mPerformance;
};

void
Performance::RunNotificationObserversTask()
{
  mPendingNotificationObserversTask = true;
  nsCOMPtr<nsIRunnable> task = new NotifyObserversTask(this);
  nsresult rv = NS_DispatchToCurrentThread(task);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    mPendingNotificationObserversTask = false;
  }
}

void
Performance::QueueEntry(PerformanceEntry* aEntry)
{
  if (mObservers.IsEmpty()) {
    return;
  }
  NS_OBSERVER_ARRAY_NOTIFY_XPCOM_OBSERVERS(mObservers,
                                           PerformanceObserver,
                                           QueueEntry, (aEntry));

  if (!mPendingNotificationObserversTask) {
    RunNotificationObserversTask();
  }
}

/* static */ bool
Performance::IsEnabled(JSContext* aCx, JSObject* aGlobal)
{
  if (NS_IsMainThread()) {
    return Preferences::GetBool("dom.enable_user_timing", false);
  }

  WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
  MOZ_ASSERT(workerPrivate);
  workerPrivate->AssertIsOnWorkerThread();

  RefPtr<PrefEnabledRunnable> runnable =
    new PrefEnabledRunnable(workerPrivate,
                            NS_LITERAL_CSTRING("dom.enable_user_timing"));
  return runnable->Dispatch() && runnable->IsEnabled();
}

/* static */ bool
Performance::IsObserverEnabled(JSContext* aCx, JSObject* aGlobal)
{
  if (NS_IsMainThread()) {
    return Preferences::GetBool("dom.enable_performance_observer", false);
  }

  WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
  MOZ_ASSERT(workerPrivate);
  workerPrivate->AssertIsOnWorkerThread();

  RefPtr<PrefEnabledRunnable> runnable =
    new PrefEnabledRunnable(workerPrivate,
                            NS_LITERAL_CSTRING("dom.enable_performance_observer"));

  return runnable->Dispatch() && runnable->IsEnabled();
}

} // dom namespace
} // mozilla namespace