108 lines
3.7 KiB
Java
108 lines
3.7 KiB
Java
/*
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* Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 6977677 8004928
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* @summary Deadlock between LogManager.<clinit> and Logger.getLogger()
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* @author Daniel D. Daugherty
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* @modules java.base/sun.util.logging
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* java.logging
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* @compile -XDignore.symbol.file LoggingDeadlock4.java
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* @run main/othervm/timeout=15 LoggingDeadlock4
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*/
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import java.util.concurrent.CountDownLatch;
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import java.util.logging.LogManager;
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import java.util.logging.Logger;
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public class LoggingDeadlock4 {
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private static CountDownLatch barrier = new CountDownLatch(1);
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private static CountDownLatch lmIsRunning = new CountDownLatch(1);
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private static CountDownLatch logIsRunning = new CountDownLatch(1);
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// Create a sun.util.logging.PlatformLogger$JavaLogger object
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// that has to be redirected when the LogManager class
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// is initialized. This can cause a deadlock between
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// LogManager.<clinit> and Logger.getLogger().
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private static final sun.util.logging.PlatformLogger log =
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sun.util.logging.PlatformLogger.getLogger("java.util.logging");
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public static void main(String[] args) {
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System.out.println("main: LoggingDeadlock4 is starting.");
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Thread lmThread = new Thread("LogManagerThread") {
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public void run() {
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// let main know LogManagerThread is running
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lmIsRunning.countDown();
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System.out.println(Thread.currentThread().getName()
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+ ": is running.");
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try {
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barrier.await(); // wait for race to start
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} catch (InterruptedException e) {
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}
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LogManager.getLogManager();
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}
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};
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lmThread.start();
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Thread logThread = new Thread("LoggerThread") {
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public void run() {
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// let main know LoggerThread is running
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logIsRunning.countDown();
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System.out.println(Thread.currentThread().getName()
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+ ": is running.");
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try {
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barrier.await(); // wait for race to start
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} catch (InterruptedException e) {
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}
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Logger.getLogger("foo logger");
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}
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};
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logThread.start();
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try {
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// wait for LogManagerThread and LoggerThread to get going
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lmIsRunning.await();
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logIsRunning.await();
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} catch (InterruptedException e) {
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}
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barrier.countDown(); // start the race
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try {
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lmThread.join();
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logThread.join();
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} catch (InterruptedException ie) {
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}
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System.out.println("main: LoggingDeadlock4 is done.");
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}
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}
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