| /* |
| * Copyright (c) 2011, 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 6977677 |
| * @summary Deadlock between LogManager.<clinit> and Logger.getLogger() |
| * @author Daniel D. Daugherty |
| * @build LoggingDeadlock4 |
| * @run main/timeout=15 LoggingDeadlock4 |
| */ |
| |
| import java.awt.Container; |
| 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); |
| |
| public static void main(String[] args) { |
| System.out.println("main: LoggingDeadlock4 is starting."); |
| |
| // Loading the java.awt.Container class will 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(). |
| try { |
| Class.forName("java.awt.Container"); |
| } catch (ClassNotFoundException cnfe) { |
| throw new RuntimeException("Test failed: could not load" |
| + " java.awt.Container." + cnfe); |
| } |
| |
| 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 manager = 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 foo = 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."); |
| } |
| } |