| /* |
| * Copyright (c) 2015, 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. |
| */ |
| |
| import org.testng.annotations.Test; |
| import org.testng.Assert; |
| |
| import com.oracle.java.testlibrary.OutputAnalyzer; |
| |
| import com.oracle.java.testlibrary.dcmd.CommandExecutor; |
| import com.oracle.java.testlibrary.dcmd.JMXExecutor; |
| |
| import java.util.concurrent.BrokenBarrierException; |
| import java.util.concurrent.CyclicBarrier; |
| import java.util.concurrent.locks.ReentrantLock; |
| import java.util.regex.Pattern; |
| |
| /* |
| * @test |
| * @summary Test of diagnostic command Thread.print |
| * @library /testlibrary |
| * @build com.oracle.java.testlibrary.* |
| * @build com.oracle.java.testlibrary.dcmd.* |
| * @run testng PrintTest |
| */ |
| public class PrintTest { |
| protected boolean jucLocks = false; |
| |
| CyclicBarrier readyBarrier = new CyclicBarrier(3); |
| CyclicBarrier doneBarrier = new CyclicBarrier(3); |
| |
| private void waitForBarrier(CyclicBarrier b) { |
| try { |
| b.await(); |
| } catch (InterruptedException | BrokenBarrierException e) { |
| Assert.fail("Test error: Caught unexpected exception:", e); |
| } |
| } |
| |
| class MonitorThread extends Thread { |
| Object lock = new Object(); |
| |
| public void run() { |
| /* Hold lock on "lock" to show up in thread dump */ |
| synchronized (lock) { |
| /* Signal that we're ready for thread dump */ |
| waitForBarrier(readyBarrier); |
| |
| /* Released when the thread dump has been taken */ |
| waitForBarrier(doneBarrier); |
| } |
| } |
| } |
| |
| class LockThread extends Thread { |
| ReentrantLock lock = new ReentrantLock(); |
| |
| public void run() { |
| /* Hold lock "lock" to show up in thread dump */ |
| lock.lock(); |
| |
| /* Signal that we're ready for thread dump */ |
| waitForBarrier(readyBarrier); |
| |
| /* Released when the thread dump has been taken */ |
| waitForBarrier(doneBarrier); |
| |
| lock.unlock(); |
| } |
| } |
| |
| public void run(CommandExecutor executor) { |
| MonitorThread mThread = new MonitorThread(); |
| mThread.start(); |
| LockThread lThread = new LockThread(); |
| lThread.start(); |
| |
| /* Wait for threads to get ready */ |
| waitForBarrier(readyBarrier); |
| |
| /* Execute */ |
| OutputAnalyzer output = executor.execute("Thread.print" + (jucLocks ? " -l=true" : "")); |
| |
| /* Signal that we've got the thread dump */ |
| waitForBarrier(doneBarrier); |
| |
| /* |
| * Example output (trimmed) with arrows indicating the rows we are looking for: |
| * |
| * ... |
| * "Thread-2" #24 prio=5 os_prio=0 tid=0x00007f913411f800 nid=0x4fc9 waiting on condition [0x00007f91fbffe000] |
| * java.lang.Thread.State: WAITING (parking) |
| * at sun.misc.Unsafe.park(Native Method) |
| * - parking to wait for <0x000000071a0868a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) |
| * at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) |
| * at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) |
| * at java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234) |
| * at java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:362) |
| * at Print.waitForBarrier(Print.java:26) |
| * at Print.access$000(Print.java:18) |
| * at Print$LockThread.run(Print.java:58) |
| * |
| * --> Locked ownable synchronizers: |
| * --> - <0x000000071a294930> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) |
| * |
| * "Thread-1" #23 prio=5 os_prio=0 tid=0x00007f913411e800 nid=0x4fc8 waiting on condition [0x00007f9200113000] |
| * java.lang.Thread.State: WAITING (parking) |
| * at sun.misc.Unsafe.park(Native Method) |
| * - parking to wait for <0x000000071a0868a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) |
| * at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) |
| * at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) |
| * at java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234) |
| * at java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:362) |
| * at Print.waitForBarrier(Print.java:26) |
| * at Print.access$000(Print.java:18) |
| * at Print$MonitorThread.run(Print.java:42) |
| * --> - locked <0x000000071a294390> (a java.lang.Object) |
| * |
| * Locked ownable synchronizers: |
| * - None |
| * |
| * "MainThread" #22 prio=5 os_prio=0 tid=0x00007f923015b000 nid=0x4fc7 in Object.wait() [0x00007f9200840000] |
| * java.lang.Thread.State: WAITING (on object monitor) |
| * at java.lang.Object.wait(Native Method) |
| * - waiting on <0x000000071a70ad98> (a java.lang.UNIXProcess) |
| * at java.lang.Object.wait(Object.java:502) |
| * at java.lang.UNIXProcess.waitFor(UNIXProcess.java:397) |
| * - locked <0x000000071a70ad98> (a java.lang.UNIXProcess) |
| * at com.oracle.java.testlibrary.dcmd.JcmdExecutor.executeImpl(JcmdExecutor.java:32) |
| * at com.oracle.java.testlibrary.dcmd.CommandExecutor.execute(CommandExecutor.java:24) |
| * --> at Print.run(Print.java:74) |
| * at Print.file(Print.java:112) |
| * ... |
| |
| */ |
| output.shouldMatch(".*at " + Pattern.quote(PrintTest.class.getName()) + "\\.run.*"); |
| output.shouldMatch(".*- locked <0x\\p{XDigit}+> \\(a " + Pattern.quote(mThread.lock.getClass().getName()) + "\\).*"); |
| |
| String jucLockPattern1 = ".*Locked ownable synchronizers:.*"; |
| String jucLockPattern2 = ".*- <0x\\p{XDigit}+> \\(a " + Pattern.quote(lThread.lock.getClass().getName()) + ".*"; |
| |
| if (jucLocks) { |
| output.shouldMatch(jucLockPattern1); |
| output.shouldMatch(jucLockPattern2); |
| } else { |
| output.shouldNotMatch(jucLockPattern1); |
| output.shouldNotMatch(jucLockPattern2); |
| } |
| } |
| |
| @Test |
| public void jmx() { |
| run(new JMXExecutor()); |
| } |
| } |