hotspot/test/runtime/7196045/Test7196045.java
author kevinw
Sun, 30 Sep 2012 23:24:12 +0100
changeset 13953 a96fb2fe0c08
parent 13870 dd2c6a5a4722
child 18500 99e313fcf726
permissions -rw-r--r--
7200145: runtime/7196045/Test7196045.java fails with No class provided for `main' Reviewed-by: dholmes, dsamersoff
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/*
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 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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/*
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 * @test
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 * @bug 7196045
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 * @summary Possible JVM deadlock in ThreadTimesClosure when using HotspotInternal non-public API.
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 * @run main/othervm Test7196045
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 */
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import java.lang.management.ManagementFactory;
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import javax.management.JMException;
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import javax.management.MBeanServer;
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import javax.management.MalformedObjectNameException;
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import javax.management.ObjectName;
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public class Test7196045 {
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    public static long duration = 1000 * 60 * 2;
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    private static final String HOTSPOT_INTERNAL = "sun.management:type=HotspotInternal";
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    public static void main(String[] args) {
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        MBeanServer server = ManagementFactory.getPlatformMBeanServer();
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        ObjectName objName= null;
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        try {
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            ObjectName hotspotInternal = new ObjectName(HOTSPOT_INTERNAL);
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            try {
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                server.registerMBean(new sun.management.HotspotInternal(), hotspotInternal);
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            } catch (JMException e) {
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                throw new RuntimeException("HotSpotWatcher: Failed to register the HotspotInternal MBean" + e);
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            }
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            objName= new ObjectName("sun.management:type=HotspotThreading");
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        } catch (MalformedObjectNameException e1) {
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            throw new RuntimeException("Bad object name" + e1);
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        }
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        long endTime = System.currentTimeMillis() + duration;
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        long i = 0;
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        while (true) {
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            try {
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                server.getAttribute(objName, "InternalThreadCpuTimes");
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            } catch (Exception ex) {
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                System.err.println("Exception while getting attribute: " + ex);
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            }
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            i++;
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            if (i % 10000 == 0) {
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                System.out.println("Successful iterations: " + i);
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            }
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            if (System.currentTimeMillis() > endTime) {
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                break;
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            }
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        }
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        System.out.println("PASSED.");
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    }
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}