6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 6977677 27 * @summary Deadlock between LogManager.<clinit> and Logger.getLogger() 28 * @author Daniel D. Daugherty 29 * @build LoggingDeadlock4 30 * @run main/othervm/timeout=15 -Djava.awt.headless=true LoggingDeadlock4 31 */ 32 33 import java.util.concurrent.CountDownLatch; 34 import java.util.logging.LogManager; 35 import java.util.logging.Logger; 36 37 public class LoggingDeadlock4 { 38 private static CountDownLatch barrier = new CountDownLatch(1); 39 private static CountDownLatch lmIsRunning = new CountDownLatch(1); 40 private static CountDownLatch logIsRunning = new CountDownLatch(1); 41 42 public static void main(String[] args) { 43 System.out.println("main: LoggingDeadlock4 is starting."); 44 45 // Loading the java.awt.Container class will create a 46 // sun.util.logging.PlatformLogger$JavaLogger object 47 // that has to be redirected when the LogManager class 48 // is initialized. This can cause a deadlock between 49 // LogManager.<clinit> and Logger.getLogger(). 50 try { 51 Class.forName("java.awt.Container"); 52 } catch (ClassNotFoundException cnfe) { 53 throw new RuntimeException("Test failed: could not load" 54 + " java.awt.Container." + cnfe); 55 } 56 57 Thread lmThread = new Thread("LogManagerThread") { 58 public void run() { 59 // let main know LogManagerThread is running 60 lmIsRunning.countDown(); 61 62 System.out.println(Thread.currentThread().getName() 63 + ": is running."); 64 65 try { 66 barrier.await(); // wait for race to start 67 } catch (InterruptedException e) { 68 } 69 70 LogManager.getLogManager(); 71 } 72 }; 73 lmThread.start(); 74 75 Thread logThread = new Thread("LoggerThread") { | 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 6977677 8004928 27 * @summary Deadlock between LogManager.<clinit> and Logger.getLogger() 28 * @author Daniel D. Daugherty 29 * @compile -XDignore.symbol.file LoggingDeadlock4.java 30 * @run main/othervm/timeout=15 LoggingDeadlock4 31 */ 32 33 import java.util.concurrent.CountDownLatch; 34 import java.util.logging.LogManager; 35 import java.util.logging.Logger; 36 37 public class LoggingDeadlock4 { 38 private static CountDownLatch barrier = new CountDownLatch(1); 39 private static CountDownLatch lmIsRunning = new CountDownLatch(1); 40 private static CountDownLatch logIsRunning = new CountDownLatch(1); 41 42 // Create a sun.util.logging.PlatformLogger$JavaLogger object 43 // that has to be redirected when the LogManager class 44 // is initialized. This can cause a deadlock between 45 // LogManager.<clinit> and Logger.getLogger(). 46 private static final sun.util.logging.PlatformLogger log = 47 sun.util.logging.PlatformLogger.getLogger("java.util.logging"); 48 49 public static void main(String[] args) { 50 System.out.println("main: LoggingDeadlock4 is starting."); 51 52 Thread lmThread = new Thread("LogManagerThread") { 53 public void run() { 54 // let main know LogManagerThread is running 55 lmIsRunning.countDown(); 56 57 System.out.println(Thread.currentThread().getName() 58 + ": is running."); 59 60 try { 61 barrier.await(); // wait for race to start 62 } catch (InterruptedException e) { 63 } 64 65 LogManager.getLogManager(); 66 } 67 }; 68 lmThread.start(); 69 70 Thread logThread = new Thread("LoggerThread") { |