--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/util/logging/LoggingDeadlock4.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,107 @@
+/*
+ * 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
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @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.");
+ }
+}