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comparison test/runtime/InternalApi/ThreadCpuTimesDeadlock.java @ 11990:fa57c8104b76

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8009585: test/runtime/7196045 times out Summary: test/runtime/7196045 times out Reviewed-by: dholmes, mseledtsov
author ctornqvi
date Fri, 02 Aug 2013 18:12:10 +0200
parents test/runtime/7196045/Test7196045.java@ac7193063af8
children
comparison
equal deleted inserted replaced
11987:81e0f17ade64 11990:fa57c8104b76
1 /*
2 * Copyright (c) 2012, 2013, 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
25 /*
26 * @test
27 * @bug 7196045
28 * @bug 8014294
29 * @summary Possible JVM deadlock in ThreadTimesClosure when using HotspotInternal non-public API.
30 * @run main/othervm -XX:+UsePerfData -Xmx32m ThreadCpuTimesDeadlock
31 */
32
33 import java.lang.management.ManagementFactory;
34 import javax.management.JMException;
35 import javax.management.MBeanServer;
36 import javax.management.MalformedObjectNameException;
37 import javax.management.ObjectName;
38
39 public class ThreadCpuTimesDeadlock {
40
41 public static byte[] dummy;
42 public static long duration = 10 * 1000;
43 private static final String HOTSPOT_INTERNAL = "sun.management:type=HotspotInternal";
44
45 public static void main(String[] args) {
46
47 MBeanServer server = ManagementFactory.getPlatformMBeanServer();
48 ObjectName objName= null;
49 try {
50 ObjectName hotspotInternal = new ObjectName(HOTSPOT_INTERNAL);
51 try {
52 server.registerMBean(new sun.management.HotspotInternal(), hotspotInternal);
53 } catch (JMException e) {
54 throw new RuntimeException("HotSpotWatcher: Failed to register the HotspotInternal MBean" + e);
55 }
56 objName= new ObjectName("sun.management:type=HotspotThreading");
57
58 } catch (MalformedObjectNameException e1) {
59 throw new RuntimeException("Bad object name" + e1);
60 }
61
62 // Thread that allocs memory to generate GC's
63 Thread allocThread = new Thread() {
64 public void run() {
65 while (true) {
66 dummy = new byte[4096];
67 }
68 }
69 };
70
71 allocThread.setDaemon(true);
72 allocThread.start();
73
74 long endTime = System.currentTimeMillis() + duration;
75 long i = 0;
76 while (true) {
77 try {
78 server.getAttribute(objName, "InternalThreadCpuTimes");
79 } catch (Exception ex) {
80 System.err.println("Exception while getting attribute: " + ex);
81 }
82 i++;
83 if (i % 10000 == 0) {
84 System.out.println("Successful iterations: " + i);
85 }
86 if (System.currentTimeMillis() > endTime) {
87 break;
88 }
89 }
90 System.out.println("PASSED.");
91 }
92 }