Mercurial > hg > truffle
view test/runtime/InternalApi/ThreadCpuTimesDeadlock.java @ 19654:f25111ca1225
Make earliest possible schedule iterative.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Mon, 02 Mar 2015 12:26:29 +0100 |
parents | fa57c8104b76 |
children |
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/* * 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."); } }