Mercurial > hg > truffle
annotate test/runtime/InternalApi/ThreadCpuTimesDeadlock.java @ 18847:cff8333119b4
fixed eclipseformat issues
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 12 Jan 2015 20:43:38 +0100 |
parents | fa57c8104b76 |
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1 /* |
11990 | 2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 /* |
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26 * @test |
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27 * @bug 7196045 |
11990 | 28 * @bug 8014294 |
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29 * @summary Possible JVM deadlock in ThreadTimesClosure when using HotspotInternal non-public API. |
11990 | 30 * @run main/othervm -XX:+UsePerfData -Xmx32m ThreadCpuTimesDeadlock |
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31 */ |
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32 |
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33 import java.lang.management.ManagementFactory; |
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34 import javax.management.JMException; |
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35 import javax.management.MBeanServer; |
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36 import javax.management.MalformedObjectNameException; |
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37 import javax.management.ObjectName; |
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38 |
11990 | 39 public class ThreadCpuTimesDeadlock { |
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40 |
11990 | 41 public static byte[] dummy; |
42 public static long duration = 10 * 1000; | |
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43 private static final String HOTSPOT_INTERNAL = "sun.management:type=HotspotInternal"; |
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44 |
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45 public static void main(String[] args) { |
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46 |
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47 MBeanServer server = ManagementFactory.getPlatformMBeanServer(); |
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48 ObjectName objName= null; |
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49 try { |
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50 ObjectName hotspotInternal = new ObjectName(HOTSPOT_INTERNAL); |
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51 try { |
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52 server.registerMBean(new sun.management.HotspotInternal(), hotspotInternal); |
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53 } catch (JMException e) { |
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54 throw new RuntimeException("HotSpotWatcher: Failed to register the HotspotInternal MBean" + e); |
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55 } |
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56 objName= new ObjectName("sun.management:type=HotspotThreading"); |
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57 |
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58 } catch (MalformedObjectNameException e1) { |
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59 throw new RuntimeException("Bad object name" + e1); |
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60 } |
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61 |
11990 | 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 | |
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74 long endTime = System.currentTimeMillis() + duration; |
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75 long i = 0; |
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76 while (true) { |
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77 try { |
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78 server.getAttribute(objName, "InternalThreadCpuTimes"); |
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79 } catch (Exception ex) { |
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80 System.err.println("Exception while getting attribute: " + ex); |
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81 } |
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82 i++; |
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83 if (i % 10000 == 0) { |
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84 System.out.println("Successful iterations: " + i); |
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85 } |
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86 if (System.currentTimeMillis() > endTime) { |
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87 break; |
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88 } |
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89 } |
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90 System.out.println("PASSED."); |
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91 } |
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92 } |