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374 lines
12 KiB
374 lines
12 KiB
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <stddef.h>
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#include "base/compiler_specific.h"
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#include "base/macros.h"
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#include "base/synchronization/waitable_event.h"
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#include "base/threading/platform_thread.h"
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#include "build/build_config.h"
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#include "testing/gtest/include/gtest/gtest.h"
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#if defined(OS_POSIX)
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#include "base/threading/platform_thread_internal_posix.h"
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#elif defined(OS_WIN)
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#include <windows.h>
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#endif
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namespace base {
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// Trivial tests that thread runs and doesn't crash on create, join, or detach -
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namespace {
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class TrivialThread : public PlatformThread::Delegate {
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public:
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TrivialThread() : run_event_(WaitableEvent::ResetPolicy::MANUAL,
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WaitableEvent::InitialState::NOT_SIGNALED) {}
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void ThreadMain() override { run_event_.Signal(); }
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WaitableEvent& run_event() { return run_event_; }
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private:
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WaitableEvent run_event_;
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DISALLOW_COPY_AND_ASSIGN(TrivialThread);
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};
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} // namespace
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TEST(PlatformThreadTest, TrivialJoin) {
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TrivialThread thread;
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PlatformThreadHandle handle;
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ASSERT_FALSE(thread.run_event().IsSignaled());
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ASSERT_TRUE(PlatformThread::Create(0, &thread, &handle));
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PlatformThread::Join(handle);
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ASSERT_TRUE(thread.run_event().IsSignaled());
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}
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TEST(PlatformThreadTest, TrivialJoinTimesTen) {
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TrivialThread thread[10];
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PlatformThreadHandle handle[arraysize(thread)];
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for (size_t n = 0; n < arraysize(thread); n++)
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ASSERT_FALSE(thread[n].run_event().IsSignaled());
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for (size_t n = 0; n < arraysize(thread); n++)
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ASSERT_TRUE(PlatformThread::Create(0, &thread[n], &handle[n]));
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for (size_t n = 0; n < arraysize(thread); n++)
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PlatformThread::Join(handle[n]);
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for (size_t n = 0; n < arraysize(thread); n++)
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ASSERT_TRUE(thread[n].run_event().IsSignaled());
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}
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// The following detach tests are by nature racy. The run_event approximates the
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// end and termination of the thread, but threads could persist shortly after
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// the test completes.
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TEST(PlatformThreadTest, TrivialDetach) {
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TrivialThread thread;
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PlatformThreadHandle handle;
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ASSERT_FALSE(thread.run_event().IsSignaled());
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ASSERT_TRUE(PlatformThread::Create(0, &thread, &handle));
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PlatformThread::Detach(handle);
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thread.run_event().Wait();
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}
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TEST(PlatformThreadTest, TrivialDetachTimesTen) {
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TrivialThread thread[10];
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PlatformThreadHandle handle[arraysize(thread)];
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for (size_t n = 0; n < arraysize(thread); n++)
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ASSERT_FALSE(thread[n].run_event().IsSignaled());
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for (size_t n = 0; n < arraysize(thread); n++) {
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ASSERT_TRUE(PlatformThread::Create(0, &thread[n], &handle[n]));
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PlatformThread::Detach(handle[n]);
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}
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for (size_t n = 0; n < arraysize(thread); n++)
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thread[n].run_event().Wait();
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}
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// Tests of basic thread functions ---------------------------------------------
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namespace {
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class FunctionTestThread : public PlatformThread::Delegate {
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public:
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FunctionTestThread()
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: thread_id_(kInvalidThreadId),
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termination_ready_(WaitableEvent::ResetPolicy::MANUAL,
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WaitableEvent::InitialState::NOT_SIGNALED),
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terminate_thread_(WaitableEvent::ResetPolicy::MANUAL,
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WaitableEvent::InitialState::NOT_SIGNALED),
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done_(false) {}
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~FunctionTestThread() override {
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EXPECT_TRUE(terminate_thread_.IsSignaled())
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<< "Need to mark thread for termination and join the underlying thread "
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<< "before destroying a FunctionTestThread as it owns the "
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<< "WaitableEvent blocking the underlying thread's main.";
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}
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// Grabs |thread_id_|, runs an optional test on that thread, signals
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// |termination_ready_|, and then waits for |terminate_thread_| to be
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// signaled before exiting.
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void ThreadMain() override {
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thread_id_ = PlatformThread::CurrentId();
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EXPECT_NE(thread_id_, kInvalidThreadId);
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// Make sure that the thread ID is the same across calls.
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EXPECT_EQ(thread_id_, PlatformThread::CurrentId());
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// Run extra tests.
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RunTest();
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termination_ready_.Signal();
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terminate_thread_.Wait();
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done_ = true;
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}
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PlatformThreadId thread_id() const {
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EXPECT_TRUE(termination_ready_.IsSignaled()) << "Thread ID still unknown";
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return thread_id_;
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}
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bool IsRunning() const {
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return termination_ready_.IsSignaled() && !done_;
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}
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// Blocks until this thread is started and ready to be terminated.
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void WaitForTerminationReady() { termination_ready_.Wait(); }
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// Marks this thread for termination (callers must then join this thread to be
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// guaranteed of termination).
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void MarkForTermination() { terminate_thread_.Signal(); }
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private:
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// Runs an optional test on the newly created thread.
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virtual void RunTest() {}
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PlatformThreadId thread_id_;
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mutable WaitableEvent termination_ready_;
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WaitableEvent terminate_thread_;
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bool done_;
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DISALLOW_COPY_AND_ASSIGN(FunctionTestThread);
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};
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} // namespace
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TEST(PlatformThreadTest, Function) {
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PlatformThreadId main_thread_id = PlatformThread::CurrentId();
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FunctionTestThread thread;
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PlatformThreadHandle handle;
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ASSERT_FALSE(thread.IsRunning());
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ASSERT_TRUE(PlatformThread::Create(0, &thread, &handle));
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thread.WaitForTerminationReady();
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ASSERT_TRUE(thread.IsRunning());
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EXPECT_NE(thread.thread_id(), main_thread_id);
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thread.MarkForTermination();
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PlatformThread::Join(handle);
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ASSERT_FALSE(thread.IsRunning());
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// Make sure that the thread ID is the same across calls.
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EXPECT_EQ(main_thread_id, PlatformThread::CurrentId());
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}
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TEST(PlatformThreadTest, FunctionTimesTen) {
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PlatformThreadId main_thread_id = PlatformThread::CurrentId();
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FunctionTestThread thread[10];
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PlatformThreadHandle handle[arraysize(thread)];
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for (size_t n = 0; n < arraysize(thread); n++)
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ASSERT_FALSE(thread[n].IsRunning());
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for (size_t n = 0; n < arraysize(thread); n++)
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ASSERT_TRUE(PlatformThread::Create(0, &thread[n], &handle[n]));
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for (size_t n = 0; n < arraysize(thread); n++)
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thread[n].WaitForTerminationReady();
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for (size_t n = 0; n < arraysize(thread); n++) {
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ASSERT_TRUE(thread[n].IsRunning());
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EXPECT_NE(thread[n].thread_id(), main_thread_id);
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// Make sure no two threads get the same ID.
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for (size_t i = 0; i < n; ++i) {
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EXPECT_NE(thread[i].thread_id(), thread[n].thread_id());
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}
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}
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for (size_t n = 0; n < arraysize(thread); n++)
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thread[n].MarkForTermination();
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for (size_t n = 0; n < arraysize(thread); n++)
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PlatformThread::Join(handle[n]);
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for (size_t n = 0; n < arraysize(thread); n++)
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ASSERT_FALSE(thread[n].IsRunning());
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// Make sure that the thread ID is the same across calls.
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EXPECT_EQ(main_thread_id, PlatformThread::CurrentId());
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}
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namespace {
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const ThreadPriority kThreadPriorityTestValues[] = {
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// The order should be higher to lower to cover as much cases as possible on
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// Linux trybots running without CAP_SYS_NICE permission.
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#if !defined(OS_ANDROID)
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// PlatformThread::GetCurrentThreadPriority() on Android does not support
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// REALTIME_AUDIO case. See http://crbug.com/505474.
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ThreadPriority::REALTIME_AUDIO,
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#endif
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ThreadPriority::DISPLAY,
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// This redundant BACKGROUND priority is to test backgrounding from other
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// priorities, and unbackgrounding.
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ThreadPriority::BACKGROUND,
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ThreadPriority::NORMAL,
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ThreadPriority::BACKGROUND};
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class ThreadPriorityTestThread : public FunctionTestThread {
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public:
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explicit ThreadPriorityTestThread(ThreadPriority priority)
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: priority_(priority) {}
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~ThreadPriorityTestThread() override = default;
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private:
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void RunTest() override {
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// Confirm that the current thread's priority is as expected.
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EXPECT_EQ(ThreadPriority::NORMAL,
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PlatformThread::GetCurrentThreadPriority());
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// Alter and verify the current thread's priority.
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PlatformThread::SetCurrentThreadPriority(priority_);
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EXPECT_EQ(priority_, PlatformThread::GetCurrentThreadPriority());
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}
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const ThreadPriority priority_;
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DISALLOW_COPY_AND_ASSIGN(ThreadPriorityTestThread);
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};
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} // namespace
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// Test changing a created thread's priority (which has different semantics on
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// some platforms).
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#if defined(OS_FUCHSIA)
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// TODO(crbug.com/851759): Thread priorities are not implemented in Fuchsia.
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#define MAYBE_ThreadPriorityCurrentThread DISABLED_ThreadPriorityCurrentThread
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#else
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#define MAYBE_ThreadPriorityCurrentThread ThreadPriorityCurrentThread
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#endif
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TEST(PlatformThreadTest, MAYBE_ThreadPriorityCurrentThread) {
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const bool increase_priority_allowed =
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PlatformThread::CanIncreaseCurrentThreadPriority();
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// Bump the priority in order to verify that new threads are started with normal
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// priority. Skip this on Mac since this platform doesn't allow changing the
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// priority of the main thread. Also skip this on platforms that don't allow
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// increasing the priority of a thread.
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#if !defined(OS_MACOSX)
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if (increase_priority_allowed)
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PlatformThread::SetCurrentThreadPriority(ThreadPriority::DISPLAY);
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#endif
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// Toggle each supported priority on the thread and confirm it affects it.
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for (size_t i = 0; i < arraysize(kThreadPriorityTestValues); ++i) {
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if (!increase_priority_allowed &&
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kThreadPriorityTestValues[i] >
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PlatformThread::GetCurrentThreadPriority()) {
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continue;
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}
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ThreadPriorityTestThread thread(kThreadPriorityTestValues[i]);
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PlatformThreadHandle handle;
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ASSERT_FALSE(thread.IsRunning());
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ASSERT_TRUE(PlatformThread::Create(0, &thread, &handle));
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thread.WaitForTerminationReady();
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ASSERT_TRUE(thread.IsRunning());
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thread.MarkForTermination();
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PlatformThread::Join(handle);
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ASSERT_FALSE(thread.IsRunning());
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}
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}
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// This tests internal PlatformThread APIs used under some POSIX platforms,
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// with the exception of Mac OS X, iOS and Fuchsia.
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#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_IOS) && \
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!defined(OS_FUCHSIA)
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TEST(PlatformThreadTest, GetNiceValueToThreadPriority) {
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using internal::NiceValueToThreadPriority;
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using internal::kThreadPriorityToNiceValueMap;
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EXPECT_EQ(ThreadPriority::BACKGROUND,
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kThreadPriorityToNiceValueMap[0].priority);
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EXPECT_EQ(ThreadPriority::NORMAL,
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kThreadPriorityToNiceValueMap[1].priority);
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EXPECT_EQ(ThreadPriority::DISPLAY,
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kThreadPriorityToNiceValueMap[2].priority);
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EXPECT_EQ(ThreadPriority::REALTIME_AUDIO,
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kThreadPriorityToNiceValueMap[3].priority);
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static const int kBackgroundNiceValue =
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kThreadPriorityToNiceValueMap[0].nice_value;
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static const int kNormalNiceValue =
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kThreadPriorityToNiceValueMap[1].nice_value;
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static const int kDisplayNiceValue =
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kThreadPriorityToNiceValueMap[2].nice_value;
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static const int kRealtimeAudioNiceValue =
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kThreadPriorityToNiceValueMap[3].nice_value;
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// The tests below assume the nice values specified in the map are within
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// the range below (both ends exclusive).
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static const int kHighestNiceValue = 19;
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static const int kLowestNiceValue = -20;
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EXPECT_GT(kHighestNiceValue, kBackgroundNiceValue);
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EXPECT_GT(kBackgroundNiceValue, kNormalNiceValue);
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EXPECT_GT(kNormalNiceValue, kDisplayNiceValue);
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EXPECT_GT(kDisplayNiceValue, kRealtimeAudioNiceValue);
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EXPECT_GT(kRealtimeAudioNiceValue, kLowestNiceValue);
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EXPECT_EQ(ThreadPriority::BACKGROUND,
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NiceValueToThreadPriority(kHighestNiceValue));
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EXPECT_EQ(ThreadPriority::BACKGROUND,
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NiceValueToThreadPriority(kBackgroundNiceValue + 1));
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EXPECT_EQ(ThreadPriority::BACKGROUND,
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NiceValueToThreadPriority(kBackgroundNiceValue));
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EXPECT_EQ(ThreadPriority::BACKGROUND,
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NiceValueToThreadPriority(kNormalNiceValue + 1));
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EXPECT_EQ(ThreadPriority::NORMAL,
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NiceValueToThreadPriority(kNormalNiceValue));
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EXPECT_EQ(ThreadPriority::NORMAL,
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NiceValueToThreadPriority(kDisplayNiceValue + 1));
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EXPECT_EQ(ThreadPriority::DISPLAY,
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NiceValueToThreadPriority(kDisplayNiceValue));
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EXPECT_EQ(ThreadPriority::DISPLAY,
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NiceValueToThreadPriority(kRealtimeAudioNiceValue + 1));
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EXPECT_EQ(ThreadPriority::REALTIME_AUDIO,
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NiceValueToThreadPriority(kRealtimeAudioNiceValue));
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EXPECT_EQ(ThreadPriority::REALTIME_AUDIO,
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NiceValueToThreadPriority(kLowestNiceValue));
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}
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#endif // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_IOS) &&
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// !defined(OS_FUCHSIA)
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TEST(PlatformThreadTest, SetHugeThreadName) {
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// Construct an excessively long thread name.
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std::string long_name(1024, 'a');
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// SetName has no return code, so just verify that implementations
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// don't [D]CHECK().
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PlatformThread::SetName(long_name);
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}
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} // namespace base
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