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 * @modules java.base/sun.misc
42 * java.compiler
43 * java.management
44 * jdk.jvmstat/sun.jvmstat.monitor
45 * @build com.oracle.java.testlibrary.*
46 * @build com.oracle.java.testlibrary.dcmd.*
47 * @run testng PrintTest
48 */
49 public class PrintTest {
50 protected boolean jucLocks = false;
51
52 CyclicBarrier readyBarrier = new CyclicBarrier(3);
53 CyclicBarrier doneBarrier = new CyclicBarrier(3);
54
55 private void waitForBarrier(CyclicBarrier b) {
56 try {
57 b.await();
58 } catch (InterruptedException | BrokenBarrierException e) {
59 Assert.fail("Test error: Caught unexpected exception:", e);
60 }
61 }
62
63 class MonitorThread extends Thread {
64 Object lock = new Object();
65
66 public void run() {
67 /* Hold lock on "lock" to show up in thread dump */
68 synchronized (lock) {
69 /* Signal that we're ready for thread dump */
70 waitForBarrier(readyBarrier);
71
72 /* Released when the thread dump has been taken */
73 waitForBarrier(doneBarrier);
74 }
75 }
76 }
77
78 class LockThread extends Thread {
79 ReentrantLock lock = new ReentrantLock();
80
81 public void run() {
82 /* Hold lock "lock" to show up in thread dump */
83 lock.lock();
84
85 /* Signal that we're ready for thread dump */
86 waitForBarrier(readyBarrier);
87
88 /* Released when the thread dump has been taken */
89 waitForBarrier(doneBarrier);
90
91 lock.unlock();
92 }
93 }
94
95 public void run(CommandExecutor executor) {
96 MonitorThread mThread = new MonitorThread();
97 mThread.start();
98 LockThread lThread = new LockThread();
99 lThread.start();
100
101 /* Wait for threads to get ready */
102 waitForBarrier(readyBarrier);
103
104 /* Execute */
105 OutputAnalyzer output = executor.execute("Thread.print" + (jucLocks ? " -l=true" : ""));
106
107 /* Signal that we've got the thread dump */
108 waitForBarrier(doneBarrier);
109
110 /*
111 * Example output (trimmed) with arrows indicating the rows we are looking for:
112 *
113 * ...
114 * "Thread-2" #24 prio=5 os_prio=0 tid=0x00007f913411f800 nid=0x4fc9 waiting on condition [0x00007f91fbffe000]
115 * java.lang.Thread.State: WAITING (parking)
116 * at sun.misc.Unsafe.park(Native Method)
117 * - parking to wait for <0x000000071a0868a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
118 * at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
119 * at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
120 * at java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234)
121 * at java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:362)
122 * at Print.waitForBarrier(Print.java:26)
123 * at Print.access$000(Print.java:18)
124 * at Print$LockThread.run(Print.java:58)
125 *
126 * --> Locked ownable synchronizers:
127 * --> - <0x000000071a294930> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
128 *
129 * "Thread-1" #23 prio=5 os_prio=0 tid=0x00007f913411e800 nid=0x4fc8 waiting on condition [0x00007f9200113000]
130 * java.lang.Thread.State: WAITING (parking)
131 * at sun.misc.Unsafe.park(Native Method)
132 * - parking to wait for <0x000000071a0868a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
133 * at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
134 * at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
135 * at java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234)
136 * at java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:362)
137 * at Print.waitForBarrier(Print.java:26)
138 * at Print.access$000(Print.java:18)
139 * at Print$MonitorThread.run(Print.java:42)
140 * --> - locked <0x000000071a294390> (a java.lang.Object)
141 *
142 * Locked ownable synchronizers:
143 * - None
144 *
145 * "MainThread" #22 prio=5 os_prio=0 tid=0x00007f923015b000 nid=0x4fc7 in Object.wait() [0x00007f9200840000]
146 * java.lang.Thread.State: WAITING (on object monitor)
147 * at java.lang.Object.wait(Native Method)
148 * - waiting on <0x000000071a70ad98> (a java.lang.UNIXProcess)
149 * at java.lang.Object.wait(Object.java:502)
150 * at java.lang.UNIXProcess.waitFor(UNIXProcess.java:397)
151 * - locked <0x000000071a70ad98> (a java.lang.UNIXProcess)
152 * at com.oracle.java.testlibrary.dcmd.JcmdExecutor.executeImpl(JcmdExecutor.java:32)
153 * at com.oracle.java.testlibrary.dcmd.CommandExecutor.execute(CommandExecutor.java:24)
154 * --> at Print.run(Print.java:74)
155 * at Print.file(Print.java:112)
156 * ...
157
158 */
159 output.shouldMatch(".*at " + Pattern.quote(PrintTest.class.getName()) + "\\.run.*");
160 output.shouldMatch(".*- locked <0x\\p{XDigit}+> \\(a " + Pattern.quote(mThread.lock.getClass().getName()) + "\\).*");
161
162 String jucLockPattern1 = ".*Locked ownable synchronizers:.*";
163 String jucLockPattern2 = ".*- <0x\\p{XDigit}+> \\(a " + Pattern.quote(lThread.lock.getClass().getName()) + ".*";
164
165 if (jucLocks) {
166 output.shouldMatch(jucLockPattern1);
167 output.shouldMatch(jucLockPattern2);
168 } else {
169 output.shouldNotMatch(jucLockPattern1);
170 output.shouldNotMatch(jucLockPattern2);
171 }
172 }
173
174 @Test
175 public void jmx() {
176 run(new JMXExecutor());
177 }
178 }