Add m-esr52 at 52.6.0

1 files changed, 378 insertions, 0 deletions

diff --git a/xpcom/tests/gtest/TestThreadUtils.cpp b/xpcom/tests/gtest/TestThreadUtils.cpp
new file mode 100644
index 0000000000..0d5d2f234b
--- /dev/null
+++ b/xpcom/tests/gtest/TestThreadUtils.cpp
@@ -0,0 +1,378 @@
+/* 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 "gtest/gtest.h"
+
+using namespace mozilla;
+
+enum {
+  TEST_CALL_VOID_ARG_VOID_RETURN,
+  TEST_CALL_VOID_ARG_VOID_RETURN_CONST,
+  TEST_CALL_VOID_ARG_NONVOID_RETURN,
+  TEST_CALL_NONVOID_ARG_VOID_RETURN,
+  TEST_CALL_NONVOID_ARG_NONVOID_RETURN,
+  TEST_CALL_NONVOID_ARG_VOID_RETURN_EXPLICIT,
+  TEST_CALL_NONVOID_ARG_NONVOID_RETURN_EXPLICIT,
+#ifdef HAVE_STDCALL
+  TEST_STDCALL_VOID_ARG_VOID_RETURN,
+  TEST_STDCALL_VOID_ARG_NONVOID_RETURN,
+  TEST_STDCALL_NONVOID_ARG_VOID_RETURN,
+  TEST_STDCALL_NONVOID_ARG_NONVOID_RETURN,
+  TEST_STDCALL_NONVOID_ARG_NONVOID_RETURN_EXPLICIT,
+#endif
+  TEST_CALL_NEWTHREAD_SUICIDAL,
+  MAX_TESTS
+};
+
+bool gRunnableExecuted[MAX_TESTS];
+
+class nsFoo : public nsISupports {
+  NS_DECL_ISUPPORTS
+  nsresult DoFoo(bool* aBool) {
+    *aBool = true;
+    return NS_OK;
+  }
+
+private:
+  virtual ~nsFoo() {}
+};
+
+NS_IMPL_ISUPPORTS0(nsFoo)
+
+class TestSuicide : public mozilla::Runnable {
+  NS_IMETHOD Run() override {
+    // Runs first time on thread "Suicide", then dies on MainThread
+    if (!NS_IsMainThread()) {
+      mThread = do_GetCurrentThread();
+      NS_DispatchToMainThread(this);
+      return NS_OK;
+    }
+    MOZ_RELEASE_ASSERT(mThread);
+    mThread->Shutdown();
+    gRunnableExecuted[TEST_CALL_NEWTHREAD_SUICIDAL] = true;
+    return NS_OK;
+  }
+
+private:
+  nsCOMPtr<nsIThread> mThread;
+};
+
+class nsBar : public nsISupports {
+  virtual ~nsBar() {}
+public:
+  NS_DECL_ISUPPORTS
+  void DoBar1(void) {
+    gRunnableExecuted[TEST_CALL_VOID_ARG_VOID_RETURN] = true;
+  }
+  void DoBar1Const(void) const {
+    gRunnableExecuted[TEST_CALL_VOID_ARG_VOID_RETURN_CONST] = true;
+  }
+  nsresult DoBar2(void) {
+    gRunnableExecuted[TEST_CALL_VOID_ARG_NONVOID_RETURN] = true;
+    return NS_OK;
+  }
+  void DoBar3(nsFoo* aFoo) {
+    aFoo->DoFoo(&gRunnableExecuted[TEST_CALL_NONVOID_ARG_VOID_RETURN]);
+  }
+  nsresult DoBar4(nsFoo* aFoo) {
+    return aFoo->DoFoo(&gRunnableExecuted[TEST_CALL_NONVOID_ARG_NONVOID_RETURN]);
+  }
+  void DoBar5(nsFoo* aFoo) {
+    if (aFoo)
+      gRunnableExecuted[TEST_CALL_NONVOID_ARG_VOID_RETURN_EXPLICIT] = true;
+  }
+  nsresult DoBar6(char* aFoo) {
+    if (strlen(aFoo))
+      gRunnableExecuted[TEST_CALL_NONVOID_ARG_NONVOID_RETURN_EXPLICIT] = true;
+    return NS_OK;
+  }
+#ifdef HAVE_STDCALL
+  void __stdcall DoBar1std(void) {
+    gRunnableExecuted[TEST_STDCALL_VOID_ARG_VOID_RETURN] = true;
+  }
+  nsresult __stdcall DoBar2std(void) {
+    gRunnableExecuted[TEST_STDCALL_VOID_ARG_NONVOID_RETURN] = true;
+    return NS_OK;
+  }
+  void __stdcall DoBar3std(nsFoo* aFoo) {
+    aFoo->DoFoo(&gRunnableExecuted[TEST_STDCALL_NONVOID_ARG_VOID_RETURN]);
+  }
+  nsresult __stdcall DoBar4std(nsFoo* aFoo) {
+    return aFoo->DoFoo(&gRunnableExecuted[TEST_STDCALL_NONVOID_ARG_NONVOID_RETURN]);
+  }
+  void __stdcall DoBar5std(nsFoo* aFoo) {
+    if (aFoo)
+      gRunnableExecuted[TEST_STDCALL_NONVOID_ARG_VOID_RETURN_EXPLICIT] = true;
+  }
+  nsresult __stdcall DoBar6std(char* aFoo) {
+    if (strlen(aFoo))
+      gRunnableExecuted[TEST_CALL_NONVOID_ARG_VOID_RETURN_EXPLICIT] = true;
+    return NS_OK;
+  }
+#endif
+};
+
+NS_IMPL_ISUPPORTS0(nsBar)
+
+struct TestCopyWithNoMove
+{
+  explicit TestCopyWithNoMove(int* aCopyCounter) : mCopyCounter(aCopyCounter) {}
+  TestCopyWithNoMove(const TestCopyWithNoMove& a) : mCopyCounter(a.mCopyCounter) { ++mCopyCounter; };
+  // No 'move' declaration, allows passing object by rvalue copy.
+  // Destructor nulls member variable...
+  ~TestCopyWithNoMove() { mCopyCounter = nullptr; }
+  // ... so we can check that the object is called when still alive.
+  void operator()() { MOZ_RELEASE_ASSERT(mCopyCounter); }
+  int* mCopyCounter;
+};
+struct TestCopyWithDeletedMove
+{
+  explicit TestCopyWithDeletedMove(int* aCopyCounter) : mCopyCounter(aCopyCounter) {}
+  TestCopyWithDeletedMove(const TestCopyWithDeletedMove& a) : mCopyCounter(a.mCopyCounter) { ++mCopyCounter; };
+  // Deleted move prevents passing by rvalue (even if copy would work)
+  TestCopyWithDeletedMove(TestCopyWithDeletedMove&&) = delete;
+  ~TestCopyWithDeletedMove() { mCopyCounter = nullptr; }
+  void operator()() { MOZ_RELEASE_ASSERT(mCopyCounter); }
+  int* mCopyCounter;
+};
+struct TestMove
+{
+  explicit TestMove(int* aMoveCounter) : mMoveCounter(aMoveCounter) {}
+  TestMove(const TestMove&) = delete;
+  TestMove(TestMove&& a) : mMoveCounter(a.mMoveCounter) { a.mMoveCounter = nullptr; ++mMoveCounter; }
+  ~TestMove() { mMoveCounter = nullptr; }
+  void operator()() { MOZ_RELEASE_ASSERT(mMoveCounter); }
+  int* mMoveCounter;
+};
+struct TestCopyMove
+{
+  TestCopyMove(int* aCopyCounter, int* aMoveCounter) : mCopyCounter(aCopyCounter), mMoveCounter(aMoveCounter) {}
+  TestCopyMove(const TestCopyMove& a) : mCopyCounter(a.mCopyCounter), mMoveCounter(a.mMoveCounter) { ++mCopyCounter; };
+  TestCopyMove(TestCopyMove&& a) : mCopyCounter(a.mCopyCounter), mMoveCounter(a.mMoveCounter) { a.mMoveCounter = nullptr; ++mMoveCounter; }
+  ~TestCopyMove() { mCopyCounter = nullptr; mMoveCounter = nullptr; }
+  void operator()() { MOZ_RELEASE_ASSERT(mCopyCounter); MOZ_RELEASE_ASSERT(mMoveCounter); }
+  int* mCopyCounter;
+  int* mMoveCounter;
+};
+
+static void Expect(const char* aContext, int aCounter, int aMaxExpected)
+{
+  EXPECT_LE(aCounter, aMaxExpected) << aContext;
+}
+
+TEST(ThreadUtils, NewRunnableFunction)
+{
+  // Test NS_NewRunnableFunction with copyable-only function object.
+  {
+    int copyCounter = 0;
+    {
+      nsCOMPtr<nsIRunnable> trackedRunnable;
+      {
+        TestCopyWithNoMove tracker(&copyCounter);
+        trackedRunnable = NS_NewRunnableFunction(tracker);
+        // Original 'tracker' is destroyed here.
+      }
+      // Verify that the runnable contains a non-destroyed function object.
+      trackedRunnable->Run();
+    }
+    Expect("NS_NewRunnableFunction with copyable-only (and no move) function, copies",
+           copyCounter, 1);
+  }
+  {
+    int copyCounter = 0;
+    {
+      nsCOMPtr<nsIRunnable> trackedRunnable;
+      {
+        // Passing as rvalue, but using copy.
+        // (TestCopyWithDeletedMove wouldn't allow this.)
+        trackedRunnable = NS_NewRunnableFunction(TestCopyWithNoMove(&copyCounter));
+      }
+      trackedRunnable->Run();
+    }
+    Expect("NS_NewRunnableFunction with copyable-only (and no move) function rvalue, copies",
+           copyCounter, 1);
+  }
+  {
+    int copyCounter = 0;
+    {
+      nsCOMPtr<nsIRunnable> trackedRunnable;
+      {
+        TestCopyWithDeletedMove tracker(&copyCounter);
+        trackedRunnable = NS_NewRunnableFunction(tracker);
+      }
+      trackedRunnable->Run();
+    }
+    Expect("NS_NewRunnableFunction with copyable-only (and deleted move) function, copies",
+           copyCounter, 1);
+  }
+
+  // Test NS_NewRunnableFunction with movable-only function object.
+  {
+    int moveCounter = 0;
+    {
+      nsCOMPtr<nsIRunnable> trackedRunnable;
+      {
+        TestMove tracker(&moveCounter);
+        trackedRunnable = NS_NewRunnableFunction(Move(tracker));
+      }
+      trackedRunnable->Run();
+    }
+    Expect("NS_NewRunnableFunction with movable-only function, moves",
+           moveCounter, 1);
+  }
+  {
+    int moveCounter = 0;
+    {
+      nsCOMPtr<nsIRunnable> trackedRunnable;
+      {
+        trackedRunnable = NS_NewRunnableFunction(TestMove(&moveCounter));
+      }
+      trackedRunnable->Run();
+    }
+    Expect("NS_NewRunnableFunction with movable-only function rvalue, moves",
+           moveCounter, 1);
+  }
+
+  // Test NS_NewRunnableFunction with copyable&movable function object.
+  {
+    int copyCounter = 0;
+    int moveCounter = 0;
+    {
+      nsCOMPtr<nsIRunnable> trackedRunnable;
+      {
+        TestCopyMove tracker(&copyCounter, &moveCounter);
+        trackedRunnable = NS_NewRunnableFunction(Move(tracker));
+      }
+      trackedRunnable->Run();
+    }
+    Expect("NS_NewRunnableFunction with copyable&movable function, copies",
+           copyCounter, 0);
+    Expect("NS_NewRunnableFunction with copyable&movable function, moves",
+           moveCounter, 1);
+  }
+  {
+    int copyCounter = 0;
+    int moveCounter = 0;
+    {
+      nsCOMPtr<nsIRunnable> trackedRunnable;
+      {
+        trackedRunnable =
+          NS_NewRunnableFunction(TestCopyMove(&copyCounter, &moveCounter));
+      }
+      trackedRunnable->Run();
+    }
+    Expect("NS_NewRunnableFunction with copyable&movable function rvalue, copies",
+           copyCounter, 0);
+    Expect("NS_NewRunnableFunction with copyable&movable function rvalue, moves",
+           moveCounter, 1);
+  }
+
+  // Test NS_NewRunnableFunction with copyable-only lambda capture.
+  {
+    int copyCounter = 0;
+    {
+      nsCOMPtr<nsIRunnable> trackedRunnable;
+      {
+        TestCopyWithNoMove tracker(&copyCounter);
+        // Expect 2 copies (here -> local lambda -> runnable lambda).
+        trackedRunnable = NS_NewRunnableFunction([tracker]() mutable { tracker(); });
+      }
+      trackedRunnable->Run();
+    }
+    Expect("NS_NewRunnableFunction with copyable-only (and no move) capture, copies",
+           copyCounter, 2);
+  }
+  {
+    int copyCounter = 0;
+    {
+      nsCOMPtr<nsIRunnable> trackedRunnable;
+      {
+        TestCopyWithDeletedMove tracker(&copyCounter);
+        // Expect 2 copies (here -> local lambda -> runnable lambda).
+        trackedRunnable = NS_NewRunnableFunction([tracker]() mutable { tracker(); });
+      }
+      trackedRunnable->Run();
+    }
+    Expect("NS_NewRunnableFunction with copyable-only (and deleted move) capture, copies",
+           copyCounter, 2);
+  }
+
+  // Note: Not possible to use move-only captures.
+  // (Until we can use C++14 generalized lambda captures)
+
+  // Test NS_NewRunnableFunction with copyable&movable lambda capture.
+  {
+    int copyCounter = 0;
+    int moveCounter = 0;
+    {
+      nsCOMPtr<nsIRunnable> trackedRunnable;
+      {
+        TestCopyMove tracker(&copyCounter, &moveCounter);
+        trackedRunnable = NS_NewRunnableFunction([tracker]() mutable { tracker(); });
+        // Expect 1 copy (here -> local lambda) and 1 move (local -> runnable lambda).
+      }
+      trackedRunnable->Run();
+    }
+    Expect("NS_NewRunnableFunction with copyable&movable capture, copies",
+           copyCounter, 1);
+    Expect("NS_NewRunnableFunction with copyable&movable capture, moves",
+           moveCounter, 1);
+  }
+}
+
+TEST(ThreadUtils, RunnableMethod)
+{
+  memset(gRunnableExecuted, false, MAX_TESTS * sizeof(bool));
+  // Scope the smart ptrs so that the runnables need to hold on to whatever they need
+  {
+    RefPtr<nsFoo> foo = new nsFoo();
+    RefPtr<nsBar> bar = new nsBar();
+    RefPtr<const nsBar> constBar = bar;
+
+    // This pointer will be freed at the end of the block
+    // Do not dereference this pointer in the runnable method!
+    RefPtr<nsFoo> rawFoo = new nsFoo();
+
+    // Read only string. Dereferencing in runnable method to check this works.
+    char* message = (char*)"Test message";
+
+    NS_DispatchToMainThread(NewRunnableMethod(bar, &nsBar::DoBar1));
+    NS_DispatchToMainThread(NewRunnableMethod(constBar, &nsBar::DoBar1Const));
+    NS_DispatchToMainThread(NewRunnableMethod(bar, &nsBar::DoBar2));
+    NS_DispatchToMainThread(NewRunnableMethod<RefPtr<nsFoo>>
+      (bar, &nsBar::DoBar3, foo));
+    NS_DispatchToMainThread(NewRunnableMethod<RefPtr<nsFoo>>
+      (bar, &nsBar::DoBar4, foo));
+    NS_DispatchToMainThread(NewRunnableMethod<nsFoo*>(bar, &nsBar::DoBar5, rawFoo));
+    NS_DispatchToMainThread(NewRunnableMethod<char*>(bar, &nsBar::DoBar6, message));
+#ifdef HAVE_STDCALL
+    NS_DispatchToMainThread(NewRunnableMethod(bar, &nsBar::DoBar1std));
+    NS_DispatchToMainThread(NewRunnableMethod(bar, &nsBar::DoBar2std));
+    NS_DispatchToMainThread(NewRunnableMethod<RefPtr<nsFoo>>
+      (bar, &nsBar::DoBar3std, foo));
+    NS_DispatchToMainThread(NewRunnableMethod<RefPtr<nsFoo>>
+      (bar, &nsBar::DoBar4std, foo));
+    NS_DispatchToMainThread(NewRunnableMethod<nsFoo*>(bar, &nsBar::DoBar5std, rawFoo));
+    NS_DispatchToMainThread(NewRunnableMethod<char*>(bar, &nsBar::DoBar6std, message));
+#endif
+  }
+
+  // Spin the event loop
+  NS_ProcessPendingEvents(nullptr);
+
+  // Now test a suicidal event in NS_New(Named)Thread
+  nsCOMPtr<nsIThread> thread;
+  NS_NewNamedThread("SuicideThread", getter_AddRefs(thread), new TestSuicide());
+  ASSERT_TRUE(thread);
+
+  while (!gRunnableExecuted[TEST_CALL_NEWTHREAD_SUICIDAL]) {
+    NS_ProcessPendingEvents(nullptr);
+  }
+
+  for (uint32_t i = 0; i < MAX_TESTS; i++) {
+    EXPECT_TRUE(gRunnableExecuted[i]) << "Error in test " << i;
+  }
+}