1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 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 import com.oracle.java.testlibrary.OutputAnalyzer; 25 import org.testng.annotations.Test; 26 27 import com.oracle.java.testlibrary.dcmd.CommandExecutor; 28 import com.oracle.java.testlibrary.dcmd.JMXExecutor; 29 30 import java.util.concurrent.BrokenBarrierException; 31 import java.util.concurrent.CyclicBarrier; 32 import java.util.concurrent.locks.ReentrantLock; 33 import java.util.regex.Pattern; 34 35 /* 36 * @test 37 * @library /testlibrary 38 * @build com.oracle.java.testlibrary.* 39 * @build com.oracle.java.testlibrary.dcmd.* 40 * @run testng PrintTest 41 */ 42 public class PrintTest { 43 protected boolean jucLocks = false; 44 45 CyclicBarrier readyBarrier = new CyclicBarrier(3); 46 CyclicBarrier doneBarrier = new CyclicBarrier(3); 47 48 private void waitForBarrier(CyclicBarrier b) { 49 try { 50 b.await(); 51 } catch (InterruptedException | BrokenBarrierException e) { 52 throw new RuntimeException("Test error: Caught unexpected exception:", e); 53 } 54 } 55 56 class MonitorThread extends Thread { 57 Object lock = new Object(); 58 59 public void run() { 60 /* Hold lock on "lock" to show up in thread dump */ 61 synchronized (lock) { 62 /* Signal that we're ready for thread dump */ 63 waitForBarrier(readyBarrier); 64 65 /* Released when the thread dump has been taken */ 66 waitForBarrier(doneBarrier); 67 } 68 } 69 } 70 71 class LockThread extends Thread { 72 ReentrantLock lock = new ReentrantLock(); 73 74 public void run() { 75 /* Hold lock "lock" to show up in thread dump */ 76 lock.lock(); 77 78 /* Signal that we're ready for thread dump */ 79 waitForBarrier(readyBarrier); 80 81 /* Released when the thread dump has been taken */ 82 waitForBarrier(doneBarrier); 83 84 lock.unlock(); 85 } 86 } 87 88 public void run(CommandExecutor executor) { 89 MonitorThread mThread = new MonitorThread(); 90 mThread.start(); 91 LockThread lThread = new LockThread(); 92 lThread.start(); 93 94 /* Wait for threads to get ready */ 95 waitForBarrier(readyBarrier); 96 97 /* Execute */ 98 OutputAnalyzer output = executor.execute("Thread.print" + (jucLocks ? " -l=true" : "")); 99 100 /* Signal that we've got the thread dump */ 101 waitForBarrier(doneBarrier); 102 103 /* 104 * Example output (trimmed) with arrows indicating the rows we are looking for: 105 * 106 * ... 107 * "Thread-2" #24 prio=5 os_prio=0 tid=0x00007f913411f800 nid=0x4fc9 waiting on condition [0x00007f91fbffe000] 108 * java.lang.Thread.State: WAITING (parking) 109 * at sun.misc.Unsafe.park(Native Method) 110 * - parking to wait for <0x000000071a0868a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) 111 * at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) 112 * at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) 113 * at java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234) 114 * at java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:362) 115 * at Print.waitForBarrier(Print.java:26) 116 * at Print.access$000(Print.java:18) 117 * at Print$LockThread.run(Print.java:58) 118 * 119 * --> Locked ownable synchronizers: 120 * --> - <0x000000071a294930> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) 121 * 122 * "Thread-1" #23 prio=5 os_prio=0 tid=0x00007f913411e800 nid=0x4fc8 waiting on condition [0x00007f9200113000] 123 * java.lang.Thread.State: WAITING (parking) 124 * at sun.misc.Unsafe.park(Native Method) 125 * - parking to wait for <0x000000071a0868a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject) 126 * at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) 127 * at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039) 128 * at java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234) 129 * at java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:362) 130 * at Print.waitForBarrier(Print.java:26) 131 * at Print.access$000(Print.java:18) 132 * at Print$MonitorThread.run(Print.java:42) 133 * --> - locked <0x000000071a294390> (a java.lang.Object) 134 * 135 * Locked ownable synchronizers: 136 * - None 137 * 138 * "MainThread" #22 prio=5 os_prio=0 tid=0x00007f923015b000 nid=0x4fc7 in Object.wait() [0x00007f9200840000] 139 * java.lang.Thread.State: WAITING (on object monitor) 140 * at java.lang.Object.wait(Native Method) 141 * - waiting on <0x000000071a70ad98> (a java.lang.UNIXProcess) 142 * at java.lang.Object.wait(Object.java:502) 143 * at java.lang.UNIXProcess.waitFor(UNIXProcess.java:397) 144 * - locked <0x000000071a70ad98> (a java.lang.UNIXProcess) 145 * at com.oracle.java.testlibrary.dcmd.JcmdExecutor.executeImpl(JcmdExecutor.java:32) 146 * at com.oracle.java.testlibrary.dcmd.CommandExecutor.execute(CommandExecutor.java:24) 147 * --> at Print.run(Print.java:74) 148 * at Print.file(Print.java:112) 149 * ... 150 151 */ 152 output.shouldMatch(".*at " + Pattern.quote(PrintTest.class.getName()) + "\\.run.*"); 153 output.shouldMatch(".*- locked <0x\\p{XDigit}+> \\(a " + Pattern.quote(mThread.lock.getClass().getName()) + "\\).*"); 154 155 String jucLockPattern1 = ".*Locked ownable synchronizers:.*"; 156 String jucLockPattern2 = ".*- <0x\\p{XDigit}+> \\(a " + Pattern.quote(lThread.lock.getClass().getName()) + ".*"; 157 158 if (jucLocks) { 159 output.shouldMatch(jucLockPattern1); 160 output.shouldMatch(jucLockPattern2); 161 } else { 162 output.shouldNotMatch(jucLockPattern1); 163 output.shouldNotMatch(jucLockPattern2); 164 } 165 } 166 167 @Test 168 public void jmx() { 169 run(new JMXExecutor()); 170 } 171 }