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 org.testng.annotations.Test;
25 import org.testng.Assert;
26
27 import com.oracle.java.testlibrary.OutputAnalyzer;
28
29 import com.oracle.java.testlibrary.dcmd.CommandExecutor;
30 import com.oracle.java.testlibrary.dcmd.JMXExecutor;
31
32 import java.util.concurrent.BrokenBarrierException;
33 import java.util.concurrent.CyclicBarrier;
34 import java.util.concurrent.locks.ReentrantLock;
35 import java.util.regex.Pattern;
36
37 /*
38 * @test
39 * @summary Test of diagnostic command Thread.print
40 * @library /testlibrary
41 * @build com.oracle.java.testlibrary.*
42 * @build com.oracle.java.testlibrary.dcmd.*
43 * @run testng PrintTest
44 */
45 public class PrintTest {
46 protected boolean jucLocks = false;
47
48 CyclicBarrier readyBarrier = new CyclicBarrier(3);
49 CyclicBarrier doneBarrier = new CyclicBarrier(3);
50
51 private void waitForBarrier(CyclicBarrier b) {
52 try {
53 b.await();
54 } catch (InterruptedException | BrokenBarrierException e) {
55 Assert.fail("Test error: Caught unexpected exception:", e);
56 }
57 }
58
59 class MonitorThread extends Thread {
60 Object lock = new Object();
61
62 public void run() {
63 /* Hold lock on "lock" to show up in thread dump */
64 synchronized (lock) {
65 /* Signal that we're ready for thread dump */
66 waitForBarrier(readyBarrier);
67
68 /* Released when the thread dump has been taken */
69 waitForBarrier(doneBarrier);
70 }
71 }
72 }
73
74 class LockThread extends Thread {
75 ReentrantLock lock = new ReentrantLock();
76
77 public void run() {
78 /* Hold lock "lock" to show up in thread dump */
79 lock.lock();
80
81 /* Signal that we're ready for thread dump */
82 waitForBarrier(readyBarrier);
83
84 /* Released when the thread dump has been taken */
85 waitForBarrier(doneBarrier);
86
87 lock.unlock();
88 }
89 }
90
91 public void run(CommandExecutor executor) {
92 MonitorThread mThread = new MonitorThread();
93 mThread.start();
94 LockThread lThread = new LockThread();
95 lThread.start();
96
97 /* Wait for threads to get ready */
98 waitForBarrier(readyBarrier);
99
100 /* Execute */
101 OutputAnalyzer output = executor.execute("Thread.print" + (jucLocks ? " -l=true" : ""));
102
103 /* Signal that we've got the thread dump */
104 waitForBarrier(doneBarrier);
105
106 /*
107 * Example output (trimmed) with arrows indicating the rows we are looking for:
108 *
109 * ...
110 * "Thread-2" #24 prio=5 os_prio=0 tid=0x00007f913411f800 nid=0x4fc9 waiting on condition [0x00007f91fbffe000]
111 * java.lang.Thread.State: WAITING (parking)
112 * at sun.misc.Unsafe.park(Native Method)
113 * - parking to wait for <0x000000071a0868a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
114 * at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
115 * at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
116 * at java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234)
117 * at java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:362)
118 * at Print.waitForBarrier(Print.java:26)
119 * at Print.access$000(Print.java:18)
120 * at Print$LockThread.run(Print.java:58)
121 *
122 * --> Locked ownable synchronizers:
123 * --> - <0x000000071a294930> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
124 *
125 * "Thread-1" #23 prio=5 os_prio=0 tid=0x00007f913411e800 nid=0x4fc8 waiting on condition [0x00007f9200113000]
126 * java.lang.Thread.State: WAITING (parking)
127 * at sun.misc.Unsafe.park(Native Method)
128 * - parking to wait for <0x000000071a0868a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
129 * at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
130 * at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
131 * at java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234)
132 * at java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:362)
133 * at Print.waitForBarrier(Print.java:26)
134 * at Print.access$000(Print.java:18)
135 * at Print$MonitorThread.run(Print.java:42)
136 * --> - locked <0x000000071a294390> (a java.lang.Object)
137 *
138 * Locked ownable synchronizers:
139 * - None
140 *
141 * "MainThread" #22 prio=5 os_prio=0 tid=0x00007f923015b000 nid=0x4fc7 in Object.wait() [0x00007f9200840000]
142 * java.lang.Thread.State: WAITING (on object monitor)
143 * at java.lang.Object.wait(Native Method)
144 * - waiting on <0x000000071a70ad98> (a java.lang.UNIXProcess)
145 * at java.lang.Object.wait(Object.java:502)
146 * at java.lang.UNIXProcess.waitFor(UNIXProcess.java:397)
147 * - locked <0x000000071a70ad98> (a java.lang.UNIXProcess)
148 * at com.oracle.java.testlibrary.dcmd.JcmdExecutor.executeImpl(JcmdExecutor.java:32)
149 * at com.oracle.java.testlibrary.dcmd.CommandExecutor.execute(CommandExecutor.java:24)
150 * --> at Print.run(Print.java:74)
151 * at Print.file(Print.java:112)
152 * ...
153
154 */
155 output.shouldMatch(".*at " + Pattern.quote(PrintTest.class.getName()) + "\\.run.*");
156 output.shouldMatch(".*- locked <0x\\p{XDigit}+> \\(a " + Pattern.quote(mThread.lock.getClass().getName()) + "\\).*");
157
158 String jucLockPattern1 = ".*Locked ownable synchronizers:.*";
159 String jucLockPattern2 = ".*- <0x\\p{XDigit}+> \\(a " + Pattern.quote(lThread.lock.getClass().getName()) + ".*";
160
161 if (jucLocks) {
162 output.shouldMatch(jucLockPattern1);
163 output.shouldMatch(jucLockPattern2);
164 } else {
165 output.shouldNotMatch(jucLockPattern1);
166 output.shouldNotMatch(jucLockPattern2);
167 }
168 }
169
170 @Test
171 public void jmx() {
172 run(new JMXExecutor());
173 }
174 }