Tools/TestWebKitAPI/Tests/WTF/Signals.cpp

/*
 * Copyright (C) 2017 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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 */

#include "config.h"

#include <type_traits>
#include <wtf/DataLog.h>
#include <wtf/Threading.h>
#include <wtf/threads/Signals.h>

class ReflectedThread : public Thread {
public:
    using Thread::m_mutex;
    using Thread::m_handle;
    using Thread::hasExited;
};

TEST(Signals, SignalsWorkOnExit)
{
    static bool handlerRan = false;
    addSignalHandler(Signal::Usr, [] (Signal, SigInfo&, PlatformRegisters&) -> SignalAction {
        dataLogLn("here");
        handlerRan = true;
        return SignalAction::Handled;
    });
    activateSignalHandlersFor(Signal::Usr);

    Atomic<bool> receiverShouldKeepRunning(true);
    Ref<Thread> receiverThread = (Thread::create("ThreadMessage receiver",
        [&receiverShouldKeepRunning] () {
            while (receiverShouldKeepRunning.load()) { }
    }));

    bool signalFired;
    {
        std::unique_lock<WordLock> locker(static_cast<ReflectedThread&>(receiverThread.get()).m_mutex);
        receiverShouldKeepRunning.store(false);
        EXPECT_FALSE(static_cast<ReflectedThread&>(receiverThread.get()).hasExited());
        sleep(1_s);
        signalFired = !pthread_kill(static_cast<ReflectedThread&>(receiverThread.get()).m_handle, std::get<0>(toSystemSignal(Signal::Usr)));
    }

    receiverThread->waitForCompletion();
    EXPECT_TRUE(handlerRan || !signalFired);
}