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| -rw-r--r-- | xpcom/tests/gtest/TestTimers.cpp | 924 |
1 files changed, 924 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/TestTimers.cpp b/xpcom/tests/gtest/TestTimers.cpp new file mode 100644 index 0000000000..a080d13c01 --- /dev/null +++ b/xpcom/tests/gtest/TestTimers.cpp @@ -0,0 +1,924 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* 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 "nsIThread.h" +#include "nsITimer.h" + +#include "nsCOMPtr.h" +#include "nsComponentManagerUtils.h" +#include "nsServiceManagerUtils.h" +#include "nsIObserverService.h" +#include "nsThreadUtils.h" +#include "prinrval.h" +#include "prmon.h" +#include "prthread.h" +#include "mozilla/Attributes.h" +#include "mozilla/gtest/MozAssertions.h" +#include "mozilla/Services.h" + +#include "mozilla/Monitor.h" +#include "mozilla/ReentrantMonitor.h" +#include "mozilla/SpinEventLoopUntil.h" +#include "mozilla/StaticPrefs_timer.h" + +#include <list> +#include <vector> + +#include "gtest/gtest.h" + +using namespace mozilla; + +typedef nsresult (*TestFuncPtr)(); + +class AutoTestThread { + public: + AutoTestThread() { + nsCOMPtr<nsIThread> newThread; + nsresult rv = + NS_NewNamedThread("AutoTestThread", getter_AddRefs(newThread)); + if (NS_FAILED(rv)) return; + + newThread.swap(mThread); + } + + ~AutoTestThread() { mThread->Shutdown(); } + + operator nsIThread*() const { return mThread; } + + nsIThread* operator->() const MOZ_NO_ADDREF_RELEASE_ON_RETURN { + return mThread; + } + + private: + nsCOMPtr<nsIThread> mThread; +}; + +class AutoCreateAndDestroyReentrantMonitor { + public: + AutoCreateAndDestroyReentrantMonitor() { + mReentrantMonitor = new ReentrantMonitor("TestTimers::AutoMon"); + MOZ_RELEASE_ASSERT(mReentrantMonitor, "Out of memory!"); + } + + ~AutoCreateAndDestroyReentrantMonitor() { delete mReentrantMonitor; } + + operator ReentrantMonitor*() const { return mReentrantMonitor; } + + private: + ReentrantMonitor* mReentrantMonitor; +}; + +class TimerCallback final : public nsITimerCallback { + public: + NS_DECL_THREADSAFE_ISUPPORTS + + TimerCallback(nsIThread** aThreadPtr, ReentrantMonitor* aReentrantMonitor) + : mThreadPtr(aThreadPtr), mReentrantMonitor(aReentrantMonitor) {} + + NS_IMETHOD Notify(nsITimer* aTimer) override { + MOZ_RELEASE_ASSERT(mThreadPtr, "Callback was not supposed to be called!"); + nsCOMPtr<nsIThread> current(do_GetCurrentThread()); + + ReentrantMonitorAutoEnter mon(*mReentrantMonitor); + + MOZ_RELEASE_ASSERT(!*mThreadPtr, "Timer called back more than once!"); + *mThreadPtr = current; + + mon.Notify(); + + return NS_OK; + } + + private: + ~TimerCallback() = default; + + nsIThread** mThreadPtr; + ReentrantMonitor* mReentrantMonitor; +}; + +NS_IMPL_ISUPPORTS(TimerCallback, nsITimerCallback) + +class TimerHelper { + public: + explicit TimerHelper(nsIEventTarget* aTarget) + : mStart(TimeStamp::Now()), + mTimer(NS_NewTimer(aTarget)), + mMonitor(__func__), + mTarget(aTarget) {} + + ~TimerHelper() { Cancel(); } + + static void ClosureCallback(nsITimer*, void* aClosure) { + reinterpret_cast<TimerHelper*>(aClosure)->Notify(); + } + + // We do not use nsITimerCallback, because that results in a circular + // reference. One of the properties we want from TimerHelper is for the + // timer to be canceled when it goes out of scope. + void Notify() { + MonitorAutoLock lock(mMonitor); + EXPECT_TRUE(mTarget->IsOnCurrentThread()); + TimeDuration elapsed = TimeStamp::Now() - mStart; + mStart = TimeStamp::Now(); + mLastDelay = Some(elapsed.ToMilliseconds()); + if (mBlockTime) { + PR_Sleep(mBlockTime); + } + mMonitor.Notify(); + } + + nsresult SetTimer(uint32_t aDelay, uint8_t aType) { + Cancel(); + MonitorAutoLock lock(mMonitor); + mStart = TimeStamp::Now(); + return mTimer->InitWithNamedFuncCallback( + ClosureCallback, this, aDelay, aType, "TimerHelper::ClosureCallback"); + } + + Maybe<uint32_t> Wait(uint32_t aLimitMs) { + return WaitAndBlockCallback(aLimitMs, 0); + } + + // Waits for callback, and if it occurs within the limit, causes the callback + // to block for the specified time. Useful for testing cases where the + // callback takes a long time to return. + Maybe<uint32_t> WaitAndBlockCallback(uint32_t aLimitMs, uint32_t aBlockTime) { + MonitorAutoLock lock(mMonitor); + mBlockTime = aBlockTime; + TimeStamp start = TimeStamp::Now(); + while (!mLastDelay.isSome()) { + mMonitor.Wait(TimeDuration::FromMilliseconds(aLimitMs)); + TimeDuration elapsed = TimeStamp::Now() - start; + uint32_t elapsedMs = static_cast<uint32_t>(elapsed.ToMilliseconds()); + if (elapsedMs >= aLimitMs) { + break; + } + aLimitMs -= elapsedMs; + start = TimeStamp::Now(); + } + mBlockTime = 0; + return std::move(mLastDelay); + } + + void Cancel() { + NS_DispatchAndSpinEventLoopUntilComplete( + "~TimerHelper timer cancel"_ns, mTarget, + NS_NewRunnableFunction("~TimerHelper timer cancel", [this] { + MonitorAutoLock lock(mMonitor); + mTimer->Cancel(); + })); + } + + private: + TimeStamp mStart; + RefPtr<nsITimer> mTimer; + mutable Monitor mMonitor MOZ_UNANNOTATED; + uint32_t mBlockTime = 0; + Maybe<uint32_t> mLastDelay; + RefPtr<nsIEventTarget> mTarget; +}; + +class SimpleTimerTest : public ::testing::Test { + public: + std::unique_ptr<TimerHelper> MakeTimer(uint32_t aDelay, uint8_t aType) { + std::unique_ptr<TimerHelper> timer(new TimerHelper(mThread)); + timer->SetTimer(aDelay, aType); + return timer; + } + + void PauseTimerThread() { + nsCOMPtr<nsIObserverService> observerService = + mozilla::services::GetObserverService(); + observerService->NotifyObservers(nullptr, "sleep_notification", nullptr); + } + + void ResumeTimerThread() { + nsCOMPtr<nsIObserverService> observerService = + mozilla::services::GetObserverService(); + observerService->NotifyObservers(nullptr, "wake_notification", nullptr); + } + + protected: + AutoTestThread mThread; +}; + +#ifdef XP_MACOSX +// For some reason, our OS X testers fire timed condition waits _extremely_ +// late (as much as 200ms). +// See https://bugzilla.mozilla.org/show_bug.cgi?id=1726915 +const unsigned kSlowdownFactor = 50; +#elif XP_WIN +// Windows also needs some extra leniency, but not nearly as much as our OS X +// testers +// See https://bugzilla.mozilla.org/show_bug.cgi?id=1729035 +const unsigned kSlowdownFactor = 5; +#else +const unsigned kSlowdownFactor = 1; +#endif + +TEST_F(SimpleTimerTest, OneShot) { + auto timer = MakeTimer(100 * kSlowdownFactor, nsITimer::TYPE_ONE_SHOT); + auto res = timer->Wait(110 * kSlowdownFactor); + ASSERT_TRUE(res.isSome()); + ASSERT_LT(*res, 110U * kSlowdownFactor); + ASSERT_GT(*res, 95U * kSlowdownFactor); +} + +TEST_F(SimpleTimerTest, TimerWithStoppedTarget) { + mThread->Shutdown(); + auto timer = MakeTimer(100 * kSlowdownFactor, nsITimer::TYPE_ONE_SHOT); + auto res = timer->Wait(110 * kSlowdownFactor); + ASSERT_FALSE(res.isSome()); +} + +TEST_F(SimpleTimerTest, SlackRepeating) { + auto timer = MakeTimer(100 * kSlowdownFactor, nsITimer::TYPE_REPEATING_SLACK); + auto delay = + timer->WaitAndBlockCallback(110 * kSlowdownFactor, 50 * kSlowdownFactor); + ASSERT_TRUE(delay.isSome()); + ASSERT_LT(*delay, 110U * kSlowdownFactor); + ASSERT_GT(*delay, 95U * kSlowdownFactor); + // REPEATING_SLACK timers re-schedule with the full duration when the timer + // callback completes + + delay = timer->Wait(110 * kSlowdownFactor); + ASSERT_TRUE(delay.isSome()); + ASSERT_LT(*delay, 160U * kSlowdownFactor); + ASSERT_GT(*delay, 145U * kSlowdownFactor); +} + +TEST_F(SimpleTimerTest, RepeatingPrecise) { + auto timer = MakeTimer(100 * kSlowdownFactor, + nsITimer::TYPE_REPEATING_PRECISE_CAN_SKIP); + auto delay = + timer->WaitAndBlockCallback(110 * kSlowdownFactor, 50 * kSlowdownFactor); + ASSERT_TRUE(delay.isSome()); + ASSERT_LT(*delay, 110U * kSlowdownFactor); + ASSERT_GT(*delay, 95U * kSlowdownFactor); + + // Delays smaller than the timer's period do not effect the period. + delay = timer->Wait(110 * kSlowdownFactor); + ASSERT_TRUE(delay.isSome()); + ASSERT_LT(*delay, 110U * kSlowdownFactor); + ASSERT_GT(*delay, 95U * kSlowdownFactor); + + // Delays larger than the timer's period should result in the skipping of + // firings, but the cadence should remain the same. + delay = + timer->WaitAndBlockCallback(110 * kSlowdownFactor, 150 * kSlowdownFactor); + ASSERT_TRUE(delay.isSome()); + ASSERT_LT(*delay, 110U * kSlowdownFactor); + ASSERT_GT(*delay, 95U * kSlowdownFactor); + + delay = timer->Wait(110 * kSlowdownFactor); + ASSERT_TRUE(delay.isSome()); + ASSERT_LT(*delay, 210U * kSlowdownFactor); + ASSERT_GT(*delay, 195U * kSlowdownFactor); +} + +// gtest on 32bit Win7 debug build is unstable and somehow this test +// makes it even worse. +#if !defined(XP_WIN) || !defined(DEBUG) || defined(HAVE_64BIT_BUILD) + +class FindExpirationTimeState final { + public: + // We'll offset the timers 10 seconds into the future to assure that they + // won't fire + const uint32_t kTimerOffset = 10 * 1000; + // And we'll set the timers spaced by 5 seconds. + const uint32_t kTimerInterval = 5 * 1000; + // We'll use 20 timers + const uint32_t kNumTimers = 20; + + TimeStamp mBefore; + TimeStamp mMiddle; + + std::list<nsCOMPtr<nsITimer>> mTimers; + + ~FindExpirationTimeState() { + while (!mTimers.empty()) { + nsCOMPtr<nsITimer> t = mTimers.front().get(); + mTimers.pop_front(); + t->Cancel(); + } + } + + // Create timers, with aNumLowPriority low priority timers first in the queue + void InitTimers(uint32_t aNumLowPriority, uint32_t aType) { + // aType is just for readability. + MOZ_ASSERT(aType == nsITimer::TYPE_ONE_SHOT_LOW_PRIORITY); + InitTimers(aNumLowPriority, nsITimer::TYPE_ONE_SHOT_LOW_PRIORITY, nullptr); + } + + // Create timers, with aNumDifferentTarget timers with target aTarget first in + // the queue + void InitTimers(uint32_t aNumDifferentTarget, nsIEventTarget* aTarget) { + InitTimers(aNumDifferentTarget, nsITimer::TYPE_ONE_SHOT, aTarget); + } + + void InitTimers(uint32_t aNumDifferingTimers, uint32_t aType, + nsIEventTarget* aTarget) { + do { + TimeStamp clearUntil = + TimeStamp::Now() + TimeDuration::FromMilliseconds( + kTimerOffset + kNumTimers * kTimerInterval); + + // NS_GetTimerDeadlineHintOnCurrentThread returns clearUntil if there are + // no pending timers before clearUntil. + // Passing 0 ensures that we examine the next timer to fire, regardless + // of its thread target. This is important, because lots of the checks + // we perform in the test get confused by timers targeted at other + // threads. + TimeStamp t = NS_GetTimerDeadlineHintOnCurrentThread(clearUntil, 0); + if (t >= clearUntil) { + break; + } + + // Clear whatever random timers there might be pending. + uint32_t waitTime = 10; + if (t > TimeStamp::Now()) { + waitTime = uint32_t((t - TimeStamp::Now()).ToMilliseconds()); + } + PR_Sleep(PR_MillisecondsToInterval(waitTime)); + } while (true); + + mBefore = TimeStamp::Now(); + mMiddle = mBefore + TimeDuration::FromMilliseconds( + kTimerOffset + kTimerInterval * kNumTimers / 2); + for (uint32_t i = 0; i < kNumTimers; ++i) { + nsCOMPtr<nsITimer> timer = NS_NewTimer(); + ASSERT_TRUE(timer); + + if (i < aNumDifferingTimers) { + if (aTarget) { + timer->SetTarget(aTarget); + } + + timer->InitWithNamedFuncCallback( + &UnusedCallbackFunc, nullptr, kTimerOffset + kTimerInterval * i, + aType, "FindExpirationTimeState::InitTimers"); + } else { + timer->InitWithNamedFuncCallback( + &UnusedCallbackFunc, nullptr, kTimerOffset + kTimerInterval * i, + nsITimer::TYPE_ONE_SHOT, "FindExpirationTimeState::InitTimers"); + } + mTimers.push_front(timer.get()); + } + } + + static void UnusedCallbackFunc(nsITimer* aTimer, void* aClosure) { + FAIL() << "Timer shouldn't fire."; + } +}; + +TEST_F(SimpleTimerTest, FindExpirationTime) { + { + FindExpirationTimeState state; + // 0 low priority timers + state.InitTimers(0, nsITimer::TYPE_ONE_SHOT_LOW_PRIORITY); + TimeStamp before = state.mBefore; + TimeStamp middle = state.mMiddle; + + TimeStamp t; + t = NS_GetTimerDeadlineHintOnCurrentThread(before, 0); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, before) << "Found time should be equal to default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(before, 20); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, before) << "Found time should be equal to default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 0); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_LT(t, middle) << "Found time should be less than default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 10); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_LT(t, middle) << "Found time should be less than default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 20); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_LT(t, middle) << "Found time should be less than default"; + } + + { + FindExpirationTimeState state; + // 5 low priority timers + state.InitTimers(5, nsITimer::TYPE_ONE_SHOT_LOW_PRIORITY); + TimeStamp before = state.mBefore; + TimeStamp middle = state.mMiddle; + + TimeStamp t; + t = NS_GetTimerDeadlineHintOnCurrentThread(before, 0); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, before) << "Found time should be equal to default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(before, 20); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, before) << "Found time should be equal to default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 0); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_LT(t, middle) << "Found time should be less than default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 10); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_LT(t, middle) << "Found time should be less than default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 20); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_LT(t, middle) << "Found time should be less than default"; + } + + { + FindExpirationTimeState state; + // 15 low priority timers + state.InitTimers(15, nsITimer::TYPE_ONE_SHOT_LOW_PRIORITY); + TimeStamp before = state.mBefore; + TimeStamp middle = state.mMiddle; + + TimeStamp t; + t = NS_GetTimerDeadlineHintOnCurrentThread(before, 0); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, before) << "Found time should be equal to default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(before, 20); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, before) << "Found time should be equal to default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 0); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_LT(t, middle) << "Found time should be equal to default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 10); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, middle) << "Found time should be equal to default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 20); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, middle) << "Found time should be equal to default"; + } + + { + AutoTestThread testThread; + FindExpirationTimeState state; + // 5 other targets + state.InitTimers(5, static_cast<nsIEventTarget*>(testThread)); + TimeStamp before = state.mBefore; + TimeStamp middle = state.mMiddle; + + TimeStamp t; + t = NS_GetTimerDeadlineHintOnCurrentThread(before, 0); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, before) << "Found time should be equal to default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(before, 20); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, before) << "Found time should be equal to default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 0); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_LT(t, middle) << "Found time should be less than default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 10); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_LT(t, middle) << "Found time should be less than default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 20); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_LT(t, middle) << "Found time should be less than default"; + } + + { + AutoTestThread testThread; + FindExpirationTimeState state; + // 15 other targets + state.InitTimers(15, static_cast<nsIEventTarget*>(testThread)); + TimeStamp before = state.mBefore; + TimeStamp middle = state.mMiddle; + + TimeStamp t; + t = NS_GetTimerDeadlineHintOnCurrentThread(before, 0); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, before) << "Found time should be equal to default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(before, 20); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, before) << "Found time should be equal to default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 0); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_LT(t, middle) << "Found time should be less than default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 10); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, middle) << "Found time should be equal to default"; + + t = NS_GetTimerDeadlineHintOnCurrentThread(middle, 20); + EXPECT_TRUE(t) << "We should find a time"; + EXPECT_EQ(t, middle) << "Found time should be equal to default"; + } +} + +#endif + +// Do these _after_ FindExpirationTime; apparently pausing the timer thread +// schedules minute-long timers, which FindExpirationTime waits out before +// starting. +TEST_F(SimpleTimerTest, SleepWakeOneShot) { + if (StaticPrefs::timer_ignore_sleep_wake_notifications()) { + return; + } + auto timer = MakeTimer(100 * kSlowdownFactor, nsITimer::TYPE_ONE_SHOT); + PauseTimerThread(); + auto delay = timer->Wait(200 * kSlowdownFactor); + ResumeTimerThread(); + ASSERT_FALSE(delay.isSome()); +} + +TEST_F(SimpleTimerTest, SleepWakeRepeatingSlack) { + if (StaticPrefs::timer_ignore_sleep_wake_notifications()) { + return; + } + auto timer = MakeTimer(100 * kSlowdownFactor, nsITimer::TYPE_REPEATING_SLACK); + PauseTimerThread(); + auto delay = timer->Wait(200 * kSlowdownFactor); + ResumeTimerThread(); + ASSERT_FALSE(delay.isSome()); + + // Timer thread slept for ~200ms, longer than the duration of the timer, so + // it should fire pretty much immediately. + delay = timer->Wait(10 * kSlowdownFactor); + ASSERT_TRUE(delay.isSome()); + ASSERT_LT(*delay, 210 * kSlowdownFactor); + ASSERT_GT(*delay, 199 * kSlowdownFactor); + + delay = timer->Wait(110 * kSlowdownFactor); + ASSERT_TRUE(delay.isSome()); + ASSERT_LT(*delay, 110U * kSlowdownFactor); + ASSERT_GT(*delay, 95U * kSlowdownFactor); + + PauseTimerThread(); + delay = timer->Wait(50 * kSlowdownFactor); + ResumeTimerThread(); + ASSERT_FALSE(delay.isSome()); + + // Timer thread only slept for ~50 ms, shorter than the duration of the + // timer, so there should be no effect on the timing. + delay = timer->Wait(110 * kSlowdownFactor); + ASSERT_TRUE(delay.isSome()); + ASSERT_LT(*delay, 110U * kSlowdownFactor); + ASSERT_GT(*delay, 95U * kSlowdownFactor); +} + +TEST_F(SimpleTimerTest, SleepWakeRepeatingPrecise) { + if (StaticPrefs::timer_ignore_sleep_wake_notifications()) { + return; + } + auto timer = MakeTimer(100 * kSlowdownFactor, + nsITimer::TYPE_REPEATING_PRECISE_CAN_SKIP); + PauseTimerThread(); + auto delay = timer->Wait(350 * kSlowdownFactor); + ResumeTimerThread(); + ASSERT_FALSE(delay.isSome()); + + // Timer thread slept longer than the duration of the timer, so it should + // fire pretty much immediately. + delay = timer->Wait(10 * kSlowdownFactor); + ASSERT_TRUE(delay.isSome()); + ASSERT_LT(*delay, 360U * kSlowdownFactor); + ASSERT_GT(*delay, 349U * kSlowdownFactor); + + // After that, we should get back on our original cadence + delay = timer->Wait(110 * kSlowdownFactor); + ASSERT_TRUE(delay.isSome()); + ASSERT_LT(*delay, 60U * kSlowdownFactor); + ASSERT_GT(*delay, 45U * kSlowdownFactor); + + delay = timer->Wait(110 * kSlowdownFactor); + ASSERT_TRUE(delay.isSome()); + ASSERT_LT(*delay, 110U * kSlowdownFactor); + ASSERT_GT(*delay, 95U * kSlowdownFactor); + + PauseTimerThread(); + delay = timer->Wait(50 * kSlowdownFactor); + ResumeTimerThread(); + ASSERT_FALSE(delay.isSome()); + + // Timer thread only slept for ~50 ms, shorter than the duration of the + // timer, so there should be no effect on the timing. + delay = timer->Wait(110 * kSlowdownFactor); + ASSERT_TRUE(delay.isSome()); + ASSERT_LT(*delay, 110U * kSlowdownFactor); + ASSERT_GT(*delay, 95U * kSlowdownFactor); +} + +#define FUZZ_MAX_TIMEOUT 9 +class FuzzTestThreadState final : public nsITimerCallback { + public: + NS_DECL_THREADSAFE_ISUPPORTS + + explicit FuzzTestThreadState(nsIThread* thread) + : mThread(thread), mStopped(false) {} + + class StartRunnable final : public mozilla::Runnable { + public: + explicit StartRunnable(FuzzTestThreadState* threadState) + : mozilla::Runnable("FuzzTestThreadState::StartRunnable"), + mThreadState(threadState) {} + + NS_IMETHOD Run() override { + mThreadState->ScheduleOrCancelTimers(); + return NS_OK; + } + + private: + RefPtr<FuzzTestThreadState> mThreadState; + }; + + void Start() { + nsCOMPtr<nsIRunnable> runnable = new StartRunnable(this); + nsresult rv = mThread->Dispatch(runnable, NS_DISPATCH_NORMAL); + MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv), "Failed to dispatch StartRunnable."); + } + + void Stop() { mStopped = true; } + + NS_IMETHOD Notify(nsITimer* aTimer) override { + bool onCorrectThread; + nsresult rv = mThread->IsOnCurrentThread(&onCorrectThread); + MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv), "Failed to perform thread check."); + MOZ_RELEASE_ASSERT(onCorrectThread, "Notify invoked on wrong thread."); + + uint32_t delay; + rv = aTimer->GetDelay(&delay); + MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv), "GetDelay failed."); + + MOZ_RELEASE_ASSERT(delay <= FUZZ_MAX_TIMEOUT, + "Delay was an invalid value for this test."); + + uint32_t type; + rv = aTimer->GetType(&type); + MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv), "Failed to get timer type."); + MOZ_RELEASE_ASSERT(type <= nsITimer::TYPE_REPEATING_PRECISE_CAN_SKIP); + + if (type == nsITimer::TYPE_ONE_SHOT) { + MOZ_RELEASE_ASSERT(!mOneShotTimersByDelay[delay].empty(), + "Unexpected one-shot timer."); + + MOZ_RELEASE_ASSERT(mOneShotTimersByDelay[delay].front().get() == aTimer, + "One-shot timers have been reordered."); + + mOneShotTimersByDelay[delay].pop_front(); + --mTimersOutstanding; + } else if (mStopped) { + CancelRepeatingTimer(aTimer); + } + + ScheduleOrCancelTimers(); + RescheduleSomeTimers(); + return NS_OK; + } + + bool HasTimersOutstanding() const { return !!mTimersOutstanding; } + + private: + ~FuzzTestThreadState() { + for (size_t i = 0; i <= FUZZ_MAX_TIMEOUT; ++i) { + MOZ_RELEASE_ASSERT(mOneShotTimersByDelay[i].empty(), + "Timers remain at end of test."); + } + } + + uint32_t GetRandomType() const { + return rand() % (nsITimer::TYPE_REPEATING_PRECISE_CAN_SKIP + 1); + } + + size_t CountOneShotTimers() const { + size_t count = 0; + for (size_t i = 0; i <= FUZZ_MAX_TIMEOUT; ++i) { + count += mOneShotTimersByDelay[i].size(); + } + return count; + } + + void ScheduleOrCancelTimers() { + if (mStopped) { + return; + } + + const size_t numTimersDesired = (rand() % 100) + 100; + MOZ_RELEASE_ASSERT(numTimersDesired >= 100); + MOZ_RELEASE_ASSERT(numTimersDesired < 200); + int adjustment = numTimersDesired - mTimersOutstanding; + + while (adjustment > 0) { + CreateRandomTimer(); + --adjustment; + } + + while (adjustment < 0) { + CancelRandomTimer(); + ++adjustment; + } + + MOZ_RELEASE_ASSERT(numTimersDesired == mTimersOutstanding); + } + + void RescheduleSomeTimers() { + if (mStopped) { + return; + } + + static const size_t kNumRescheduled = 40; + + // Reschedule some timers with a Cancel first. + for (size_t i = 0; i < kNumRescheduled; ++i) { + InitRandomTimer(CancelRandomTimer().get()); + } + // Reschedule some timers without a Cancel first. + for (size_t i = 0; i < kNumRescheduled; ++i) { + InitRandomTimer(RemoveRandomTimer().get()); + } + } + + void CreateRandomTimer() { + nsCOMPtr<nsITimer> timer = + NS_NewTimer(static_cast<nsIEventTarget*>(mThread.get())); + MOZ_RELEASE_ASSERT(timer, "Failed to create timer."); + + InitRandomTimer(timer.get()); + } + + nsCOMPtr<nsITimer> CancelRandomTimer() { + nsCOMPtr<nsITimer> timer(RemoveRandomTimer()); + timer->Cancel(); + return timer; + } + + nsCOMPtr<nsITimer> RemoveRandomTimer() { + MOZ_RELEASE_ASSERT(mTimersOutstanding); + + if ((GetRandomType() == nsITimer::TYPE_ONE_SHOT && CountOneShotTimers()) || + mRepeatingTimers.empty()) { + uint32_t delayToRemove = rand() % (FUZZ_MAX_TIMEOUT + 1); + while (mOneShotTimersByDelay[delayToRemove].empty()) { + // ++delayToRemove mod FUZZ_MAX_TIMEOUT + 1 + delayToRemove = (delayToRemove + 1) % (FUZZ_MAX_TIMEOUT + 1); + } + + uint32_t indexToRemove = + rand() % mOneShotTimersByDelay[delayToRemove].size(); + + for (auto it = mOneShotTimersByDelay[delayToRemove].begin(); + it != mOneShotTimersByDelay[delayToRemove].end(); ++it) { + if (indexToRemove) { + --indexToRemove; + continue; + } + + nsCOMPtr<nsITimer> removed = *it; + mOneShotTimersByDelay[delayToRemove].erase(it); + --mTimersOutstanding; + return removed; + } + } else { + size_t indexToRemove = rand() % mRepeatingTimers.size(); + nsCOMPtr<nsITimer> removed(mRepeatingTimers[indexToRemove]); + mRepeatingTimers.erase(mRepeatingTimers.begin() + indexToRemove); + --mTimersOutstanding; + return removed; + } + + MOZ_CRASH("Unable to remove a timer"); + } + + void InitRandomTimer(nsITimer* aTimer) { + // Between 0 and FUZZ_MAX_TIMEOUT + uint32_t delay = rand() % (FUZZ_MAX_TIMEOUT + 1); + uint32_t type = GetRandomType(); + nsresult rv = aTimer->InitWithCallback(this, delay, type); + MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv), "Failed to set timer."); + + if (type == nsITimer::TYPE_ONE_SHOT) { + mOneShotTimersByDelay[delay].push_back(aTimer); + } else { + mRepeatingTimers.push_back(aTimer); + } + ++mTimersOutstanding; + } + + void CancelRepeatingTimer(nsITimer* aTimer) { + for (auto it = mRepeatingTimers.begin(); it != mRepeatingTimers.end(); + ++it) { + if (it->get() == aTimer) { + mRepeatingTimers.erase(it); + aTimer->Cancel(); + --mTimersOutstanding; + return; + } + } + } + + nsCOMPtr<nsIThread> mThread; + // Scheduled timers, indexed by delay between 0-9 ms, in lists + // with most recently scheduled last. + std::list<nsCOMPtr<nsITimer>> mOneShotTimersByDelay[FUZZ_MAX_TIMEOUT + 1]; + std::vector<nsCOMPtr<nsITimer>> mRepeatingTimers; + Atomic<bool> mStopped; + Atomic<size_t> mTimersOutstanding; +}; + +NS_IMPL_ISUPPORTS(FuzzTestThreadState, nsITimerCallback) + +TEST(Timers, FuzzTestTimers) +{ + static const size_t kNumThreads(10); + AutoTestThread threads[kNumThreads]; + RefPtr<FuzzTestThreadState> threadStates[kNumThreads]; + + for (size_t i = 0; i < kNumThreads; ++i) { + threadStates[i] = new FuzzTestThreadState(&*threads[i]); + threadStates[i]->Start(); + } + + PR_Sleep(PR_MillisecondsToInterval(20000)); + + for (size_t i = 0; i < kNumThreads; ++i) { + threadStates[i]->Stop(); + } + + // Wait at most 10 seconds for all outstanding timers to pop + PRIntervalTime start = PR_IntervalNow(); + for (auto& threadState : threadStates) { + while (threadState->HasTimersOutstanding()) { + uint32_t elapsedMs = PR_IntervalToMilliseconds(PR_IntervalNow() - start); + ASSERT_LE(elapsedMs, uint32_t(10000)) + << "Timed out waiting for all timers to pop"; + PR_Sleep(PR_MillisecondsToInterval(10)); + } + } +} + +TEST(Timers, ClosureCallback) +{ + AutoCreateAndDestroyReentrantMonitor newMon; + ASSERT_TRUE(newMon); + + AutoTestThread testThread; + ASSERT_TRUE(testThread); + + nsIThread* notifiedThread = nullptr; + + nsCOMPtr<nsITimer> timer; + nsresult rv = NS_NewTimerWithCallback( + getter_AddRefs(timer), + [&](nsITimer*) { + nsCOMPtr<nsIThread> current(do_GetCurrentThread()); + + ReentrantMonitorAutoEnter mon(*newMon); + ASSERT_FALSE(notifiedThread); + notifiedThread = current; + mon.Notify(); + }, + 50, nsITimer::TYPE_ONE_SHOT, "(test) Timers.ClosureCallback", testThread); + ASSERT_NS_SUCCEEDED(rv); + + ReentrantMonitorAutoEnter mon(*newMon); + while (!notifiedThread) { + mon.Wait(); + } + ASSERT_EQ(notifiedThread, testThread); +} + +static void SetTime(nsITimer* aTimer, void* aClosure) { + *static_cast<TimeStamp*>(aClosure) = TimeStamp::Now(); +} + +TEST(Timers, HighResFuncCallback) +{ + TimeStamp first; + TimeStamp second; + TimeStamp third; + nsCOMPtr<nsITimer> t1 = NS_NewTimer(GetCurrentSerialEventTarget()); + nsCOMPtr<nsITimer> t2 = NS_NewTimer(GetCurrentSerialEventTarget()); + nsCOMPtr<nsITimer> t3 = NS_NewTimer(GetCurrentSerialEventTarget()); + + // Reverse order, since if the timers are not high-res we'd end up + // out-of-order. + MOZ_ALWAYS_SUCCEEDS(t3->InitHighResolutionWithNamedFuncCallback( + &SetTime, &third, TimeDuration::FromMicroseconds(300), + nsITimer::TYPE_ONE_SHOT, "TestTimers::HighResFuncCallback::third")); + MOZ_ALWAYS_SUCCEEDS(t2->InitHighResolutionWithNamedFuncCallback( + &SetTime, &second, TimeDuration::FromMicroseconds(200), + nsITimer::TYPE_ONE_SHOT, "TestTimers::HighResFuncCallback::second")); + MOZ_ALWAYS_SUCCEEDS(t1->InitHighResolutionWithNamedFuncCallback( + &SetTime, &first, TimeDuration::FromMicroseconds(100), + nsITimer::TYPE_ONE_SHOT, "TestTimers::HighResFuncCallback::first")); + + SpinEventLoopUntil<ProcessFailureBehavior::IgnoreAndContinue>( + "TestTimers::HighResFuncCallback"_ns, + [&] { return !first.IsNull() && !second.IsNull() && !third.IsNull(); }); +} |