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") {