1 files changed, 379 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/TestThreads.cpp b/xpcom/tests/gtest/TestThreads.cpp
new file mode 100644
index 0000000000..4f2e0d7a59
--- /dev/null
+++ b/xpcom/tests/gtest/TestThreads.cpp
@@ -0,0 +1,379 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "nsThreadUtils.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <memory>
+#include "nspr.h"
+#include "nsCOMPtr.h"
+#include "nsITargetShutdownTask.h"
+#include "nsIThread.h"
+#include "nsXPCOM.h"
+#include "mozilla/gtest/MozAssertions.h"
+#include "mozilla/Monitor.h"
+#include "mozilla/SyncRunnable.h"
+#include "gtest/gtest.h"
+
+using namespace mozilla;
+
+class nsRunner final : public Runnable {
+  ~nsRunner() = default;
+
+ public:
+  NS_IMETHOD Run() override {
+    nsCOMPtr<nsIThread> thread;
+    nsresult rv = NS_GetCurrentThread(getter_AddRefs(thread));
+    EXPECT_NS_SUCCEEDED(rv);
+    printf("running %d on thread %p\n", mNum, (void*)thread.get());
+
+    // if we don't do something slow, we'll never see the other
+    // worker threads run
+    PR_Sleep(PR_MillisecondsToInterval(100));
+
+    return rv;
+  }
+
+  explicit nsRunner(int num) : Runnable("nsRunner"), mNum(num) {}
+
+ protected:
+  int mNum;
+};
+
+TEST(Threads, Main)
+{
+  nsresult rv;
+
+  nsCOMPtr<nsIRunnable> event = new nsRunner(0);
+  EXPECT_TRUE(event);
+
+  nsCOMPtr<nsIThread> runner;
+  rv = NS_NewNamedThread("TestThreadsMain", getter_AddRefs(runner), event);
+  EXPECT_NS_SUCCEEDED(rv);
+
+  nsCOMPtr<nsIThread> thread;
+  rv = NS_GetCurrentThread(getter_AddRefs(thread));
+  EXPECT_NS_SUCCEEDED(rv);
+
+  rv = runner->Shutdown();  // wait for the runner to die before quitting
+  EXPECT_NS_SUCCEEDED(rv);
+
+  PR_Sleep(
+      PR_MillisecondsToInterval(100));  // hopefully the runner will quit here
+}
+
+class nsStressRunner final : public Runnable {
+ public:
+  NS_IMETHOD Run() override {
+    EXPECT_FALSE(mWasRun);
+    mWasRun = true;
+    PR_Sleep(1);
+    if (!PR_AtomicDecrement(&gNum)) {
+      printf("   last thread was %d\n", mNum);
+    }
+    return NS_OK;
+  }
+
+  explicit nsStressRunner(int num)
+      : Runnable("nsStressRunner"), mNum(num), mWasRun(false) {
+    PR_AtomicIncrement(&gNum);
+  }
+
+  static int32_t GetGlobalCount() { return gNum; }
+
+ private:
+  ~nsStressRunner() { EXPECT_TRUE(mWasRun); }
+
+ protected:
+  static int32_t gNum;
+  int32_t mNum;
+  bool mWasRun;
+};
+
+int32_t nsStressRunner::gNum = 0;
+
+TEST(Threads, Stress)
+{
+#if defined(XP_WIN) && defined(MOZ_ASAN)  // Easily hits OOM
+  const int loops = 250;
+#else
+  const int loops = 1000;
+#endif
+
+  const int threads = 50;
+
+  for (int i = 0; i < loops; i++) {
+    printf("Loop %d of %d\n", i + 1, loops);
+
+    int k;
+    nsIThread** array = new nsIThread*[threads];
+
+    EXPECT_EQ(nsStressRunner::GetGlobalCount(), 0);
+
+    for (k = 0; k < threads; k++) {
+      nsCOMPtr<nsIThread> t;
+      nsresult rv = NS_NewNamedThread("StressRunner", getter_AddRefs(t),
+                                      new nsStressRunner(k));
+      EXPECT_NS_SUCCEEDED(rv);
+      NS_ADDREF(array[k] = t);
+    }
+
+    for (k = threads - 1; k >= 0; k--) {
+      array[k]->Shutdown();
+      NS_RELEASE(array[k]);
+    }
+    delete[] array;
+  }
+}
+
+mozilla::Monitor* gAsyncShutdownReadyMonitor;
+mozilla::Monitor* gBeginAsyncShutdownMonitor;
+
+class AsyncShutdownPreparer : public Runnable {
+ public:
+  NS_IMETHOD Run() override {
+    EXPECT_FALSE(mWasRun);
+    mWasRun = true;
+
+    mozilla::MonitorAutoLock lock(*gAsyncShutdownReadyMonitor);
+    lock.Notify();
+
+    return NS_OK;
+  }
+
+  explicit AsyncShutdownPreparer()
+      : Runnable("AsyncShutdownPreparer"), mWasRun(false) {}
+
+ private:
+  virtual ~AsyncShutdownPreparer() { EXPECT_TRUE(mWasRun); }
+
+ protected:
+  bool mWasRun;
+};
+
+class AsyncShutdownWaiter : public Runnable {
+ public:
+  NS_IMETHOD Run() override {
+    EXPECT_FALSE(mWasRun);
+    mWasRun = true;
+
+    nsCOMPtr<nsIThread> t;
+    nsresult rv;
+
+    {
+      mozilla::MonitorAutoLock lock(*gBeginAsyncShutdownMonitor);
+
+      rv = NS_NewNamedThread("AsyncShutdownPr", getter_AddRefs(t),
+                             new AsyncShutdownPreparer());
+      EXPECT_NS_SUCCEEDED(rv);
+
+      lock.Wait();
+    }
+
+    rv = t->AsyncShutdown();
+    EXPECT_NS_SUCCEEDED(rv);
+
+    return NS_OK;
+  }
+
+  explicit AsyncShutdownWaiter()
+      : Runnable("AsyncShutdownWaiter"), mWasRun(false) {}
+
+ private:
+  virtual ~AsyncShutdownWaiter() { EXPECT_TRUE(mWasRun); }
+
+ protected:
+  bool mWasRun;
+};
+
+class SameThreadSentinel : public Runnable {
+ public:
+  NS_IMETHOD Run() override {
+    mozilla::MonitorAutoLock lock(*gBeginAsyncShutdownMonitor);
+    lock.Notify();
+    return NS_OK;
+  }
+
+  SameThreadSentinel() : Runnable("SameThreadSentinel") {}
+
+ private:
+  virtual ~SameThreadSentinel() = default;
+};
+
+TEST(Threads, AsyncShutdown)
+{
+  gAsyncShutdownReadyMonitor = new mozilla::Monitor("gAsyncShutdownReady");
+  gBeginAsyncShutdownMonitor = new mozilla::Monitor("gBeginAsyncShutdown");
+
+  nsCOMPtr<nsIThread> t;
+  nsresult rv;
+
+  {
+    mozilla::MonitorAutoLock lock(*gAsyncShutdownReadyMonitor);
+
+    rv = NS_NewNamedThread("AsyncShutdownWt", getter_AddRefs(t),
+                           new AsyncShutdownWaiter());
+    EXPECT_NS_SUCCEEDED(rv);
+
+    lock.Wait();
+  }
+
+  NS_DispatchToCurrentThread(new SameThreadSentinel());
+  rv = t->Shutdown();
+  EXPECT_NS_SUCCEEDED(rv);
+
+  delete gAsyncShutdownReadyMonitor;
+  delete gBeginAsyncShutdownMonitor;
+}
+
+static void threadProc(void* arg) {
+  // printf("   running thread %d\n", (int) arg);
+  PR_Sleep(1);
+  EXPECT_EQ(PR_JOINABLE_THREAD, PR_GetThreadState(PR_GetCurrentThread()));
+}
+
+TEST(Threads, StressNSPR)
+{
+#if defined(XP_WIN) && defined(MOZ_ASAN)  // Easily hits OOM
+  const int loops = 250;
+#else
+  const int loops = 1000;
+#endif
+
+  const int threads = 50;
+
+  for (int i = 0; i < loops; i++) {
+    printf("Loop %d of %d\n", i + 1, loops);
+
+    intptr_t k;
+    PRThread** array = new PRThread*[threads];
+
+    for (k = 0; k < threads; k++) {
+      array[k] = PR_CreateThread(PR_USER_THREAD, threadProc, (void*)k,
+                                 PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD,
+                                 PR_JOINABLE_THREAD, 0);
+      EXPECT_TRUE(array[k]);
+    }
+
+    for (k = 0; k < threads; k++) {
+      EXPECT_EQ(PR_JOINABLE_THREAD, PR_GetThreadState(array[k]));
+    }
+
+    for (k = threads - 1; k >= 0; k--) {
+      PR_JoinThread(array[k]);
+    }
+    delete[] array;
+  }
+}
+
+TEST(Threads, GetCurrentSerialEventTarget)
+{
+  nsCOMPtr<nsIThread> thread;
+  nsresult rv =
+      NS_NewNamedThread("Testing Thread", getter_AddRefs(thread),
+                        NS_NewRunnableFunction("Testing Thread::check", []() {
+                          nsCOMPtr<nsISerialEventTarget> serialEventTarget =
+                              GetCurrentSerialEventTarget();
+                          nsCOMPtr<nsIThread> thread = NS_GetCurrentThread();
+                          EXPECT_EQ(thread.get(), serialEventTarget.get());
+                        }));
+  MOZ_ALWAYS_SUCCEEDS(rv);
+  thread->Shutdown();
+}
+
+namespace {
+
+class TestShutdownTask final : public nsITargetShutdownTask {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+
+  explicit TestShutdownTask(std::function<void()> aCallback)
+      : mCallback(std::move(aCallback)) {}
+
+  void TargetShutdown() override {
+    if (mCallback) {
+      mCallback();
+    }
+  }
+
+ private:
+  ~TestShutdownTask() = default;
+  std::function<void()> mCallback;
+};
+
+NS_IMPL_ISUPPORTS(TestShutdownTask, nsITargetShutdownTask)
+
+}  // namespace
+
+TEST(Threads, ShutdownTask)
+{
+  auto shutdownTaskRun = std::make_shared<bool>();
+  auto runnableFromShutdownRun = std::make_shared<bool>();
+
+  nsCOMPtr<nsIThread> thread;
+  nsresult rv = NS_NewNamedThread("Testing Thread", getter_AddRefs(thread));
+  MOZ_ALWAYS_SUCCEEDS(rv);
+
+  nsCOMPtr<nsITargetShutdownTask> shutdownTask = new TestShutdownTask([=] {
+    EXPECT_TRUE(thread->IsOnCurrentThread());
+
+    ASSERT_FALSE(*shutdownTaskRun);
+    *shutdownTaskRun = true;
+
+    nsCOMPtr<nsITargetShutdownTask> dummyTask = new TestShutdownTask([] {});
+    nsresult rv = thread->RegisterShutdownTask(dummyTask);
+    EXPECT_TRUE(rv == NS_ERROR_UNEXPECTED);
+
+    MOZ_ALWAYS_SUCCEEDS(
+        thread->Dispatch(NS_NewRunnableFunction("afterShutdownTask", [=] {
+          EXPECT_TRUE(thread->IsOnCurrentThread());
+
+          nsCOMPtr<nsITargetShutdownTask> dummyTask =
+              new TestShutdownTask([] {});
+          nsresult rv = thread->RegisterShutdownTask(dummyTask);
+          EXPECT_TRUE(rv == NS_ERROR_UNEXPECTED);
+
+          ASSERT_FALSE(*runnableFromShutdownRun);
+          *runnableFromShutdownRun = true;
+        })));
+  });
+  MOZ_ALWAYS_SUCCEEDS(thread->RegisterShutdownTask(shutdownTask));
+
+  ASSERT_FALSE(*shutdownTaskRun);
+  ASSERT_FALSE(*runnableFromShutdownRun);
+
+  RefPtr<mozilla::SyncRunnable> syncWithThread =
+      new mozilla::SyncRunnable(NS_NewRunnableFunction("dummy", [] {}));
+  MOZ_ALWAYS_SUCCEEDS(syncWithThread->DispatchToThread(thread));
+
+  ASSERT_FALSE(*shutdownTaskRun);
+  ASSERT_FALSE(*runnableFromShutdownRun);
+
+  thread->Shutdown();
+
+  ASSERT_TRUE(*shutdownTaskRun);
+  ASSERT_TRUE(*runnableFromShutdownRun);
+}
+
+TEST(Threads, UnregisteredShutdownTask)
+{
+  nsCOMPtr<nsIThread> thread;
+  nsresult rv = NS_NewNamedThread("Testing Thread", getter_AddRefs(thread));
+  MOZ_ALWAYS_SUCCEEDS(rv);
+
+  nsCOMPtr<nsITargetShutdownTask> shutdownTask =
+      new TestShutdownTask([=] { MOZ_CRASH("should not be run"); });
+
+  MOZ_ALWAYS_SUCCEEDS(thread->RegisterShutdownTask(shutdownTask));
+
+  RefPtr<mozilla::SyncRunnable> syncWithThread =
+      new mozilla::SyncRunnable(NS_NewRunnableFunction("dummy", [] {}));
+  MOZ_ALWAYS_SUCCEEDS(syncWithThread->DispatchToThread(thread));
+
+  MOZ_ALWAYS_SUCCEEDS(thread->UnregisterShutdownTask(shutdownTask));
+
+  thread->Shutdown();
+}