/*

 * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

/*

 * @test

 * @bug     6977677 8004928

 * @summary Deadlock between LogManager.<clinit> and Logger.getLogger()

 * @author  Daniel D. Daugherty

 * @modules java.base/sun.util.logging

 *          java.logging

 * @compile -XDignore.symbol.file LoggingDeadlock4.java

 * @run main/othervm/timeout=15 LoggingDeadlock4

 */

import java.util.concurrent.CountDownLatch;

import java.util.logging.LogManager;

import java.util.logging.Logger;

public class LoggingDeadlock4 {

    private static CountDownLatch barrier      = new CountDownLatch(1);

    private static CountDownLatch lmIsRunning  = new CountDownLatch(1);

    private static CountDownLatch logIsRunning = new CountDownLatch(1);

    // Create a sun.util.logging.PlatformLogger$JavaLogger object

    // that has to be redirected when the LogManager class

    // is initialized. This can cause a deadlock between

    // LogManager.<clinit> and Logger.getLogger().

    private static final sun.util.logging.PlatformLogger log =

        sun.util.logging.PlatformLogger.getLogger("java.util.logging");

    public static void main(String[] args) {

        System.out.println("main: LoggingDeadlock4 is starting.");

        Thread lmThread = new Thread("LogManagerThread") {

            public void run() {

                // let main know LogManagerThread is running

                lmIsRunning.countDown();

                System.out.println(Thread.currentThread().getName()

                    + ": is running.");

                try {

                    barrier.await();  // wait for race to start

                } catch (InterruptedException e) {

                }

                LogManager.getLogManager();

            }

        };

        lmThread.start();

        Thread logThread = new Thread("LoggerThread") {

            public void run() {

                // let main know LoggerThread is running

                logIsRunning.countDown();

                System.out.println(Thread.currentThread().getName()

                    + ": is running.");

                try {

                    barrier.await();  // wait for race to start

                } catch (InterruptedException e) {

                }

                Logger.getLogger("foo logger");

            }

        };

        logThread.start();

        try {

            // wait for LogManagerThread and LoggerThread to get going

            lmIsRunning.await();

            logIsRunning.await();

        } catch (InterruptedException e) {

        }

        barrier.countDown();  // start the race

        try {

            lmThread.join();

            logThread.join();

        } catch (InterruptedException ie) {

        }

        System.out.println("main: LoggingDeadlock4 is done.");

    }

}