Mercurial > hg > truffle
diff test/runtime/InternalApi/ThreadCpuTimesDeadlock.java @ 11990:fa57c8104b76
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 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/runtime/InternalApi/ThreadCpuTimesDeadlock.java Fri Aug 02 18:12:10 2013 +0200 @@ -0,0 +1,92 @@ +/* + * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +/* + * @test + * @bug 7196045 + * @bug 8014294 + * @summary Possible JVM deadlock in ThreadTimesClosure when using HotspotInternal non-public API. + * @run main/othervm -XX:+UsePerfData -Xmx32m ThreadCpuTimesDeadlock + */ + +import java.lang.management.ManagementFactory; +import javax.management.JMException; +import javax.management.MBeanServer; +import javax.management.MalformedObjectNameException; +import javax.management.ObjectName; + +public class ThreadCpuTimesDeadlock { + + public static byte[] dummy; + public static long duration = 10 * 1000; + private static final String HOTSPOT_INTERNAL = "sun.management:type=HotspotInternal"; + + public static void main(String[] args) { + + MBeanServer server = ManagementFactory.getPlatformMBeanServer(); + ObjectName objName= null; + try { + ObjectName hotspotInternal = new ObjectName(HOTSPOT_INTERNAL); + try { + server.registerMBean(new sun.management.HotspotInternal(), hotspotInternal); + } catch (JMException e) { + throw new RuntimeException("HotSpotWatcher: Failed to register the HotspotInternal MBean" + e); + } + objName= new ObjectName("sun.management:type=HotspotThreading"); + + } catch (MalformedObjectNameException e1) { + throw new RuntimeException("Bad object name" + e1); + } + + // Thread that allocs memory to generate GC's + Thread allocThread = new Thread() { + public void run() { + while (true) { + dummy = new byte[4096]; + } + } + }; + + allocThread.setDaemon(true); + allocThread.start(); + + long endTime = System.currentTimeMillis() + duration; + long i = 0; + while (true) { + try { + server.getAttribute(objName, "InternalThreadCpuTimes"); + } catch (Exception ex) { + System.err.println("Exception while getting attribute: " + ex); + } + i++; + if (i % 10000 == 0) { + System.out.println("Successful iterations: " + i); + } + if (System.currentTimeMillis() > endTime) { + break; + } + } + System.out.println("PASSED."); + } +}