102 lines
3.5 KiB
Java
102 lines
3.5 KiB
Java
/*
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* Copyright (c) 2012, 2021, 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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* @test
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* @bug 7196045
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* @bug 8014294
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* @summary Possible JVM deadlock in ThreadTimesClosure when using HotspotInternal non-public API.
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* @modules java.management/sun.management
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* @run main/othervm -XX:+UsePerfData -Xmx128m ThreadCpuTimesDeadlock
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*/
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/*
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* @test
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* @bug 8264649
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* @summary OSR compiled method crash when UseTLAB is off
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* @requires vm.debug
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* @modules java.management/sun.management
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* @run main/othervm -XX:-UseTLAB -XX:+UsePerfData -Xmx128m ThreadCpuTimesDeadlock
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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 ThreadCpuTimesDeadlock {
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public static byte[] dummy;
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public static long duration = 10 * 1000;
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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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// Thread that allocs memory to generate GC's
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Thread allocThread = new Thread() {
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public void run() {
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while (true) {
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dummy = new byte[4096];
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}
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}
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};
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allocThread.setDaemon(true);
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allocThread.start();
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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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}
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