113 lines
3.7 KiB
Java
113 lines
3.7 KiB
Java
/*
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* Copyright (c) 2013, 2015, 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 7105883
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* @summary Ensure that JDWP doesn't crash with a null thread group name
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*
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* @run build TestScaffold VMConnection TargetListener TargetAdapter
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* @run driver NullThreadGroupNameTest
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*/
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import com.sun.jdi.*;
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import com.sun.jdi.connect.*;
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import com.sun.jdi.event.*;
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import com.sun.jdi.request.*;
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import com.sun.jdi.VMDisconnectedException;
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import java.util.concurrent.CountDownLatch;
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import java.util.*;
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class DebugTarget {
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public final static String DEBUG_THREAD_NAME = "DebugThread";
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public static void main(String[] args) throws Exception {
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DebugThread thread = new DebugThread();
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thread.start();
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thread.runningLatch.await();
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breakpointHere();
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thread.breakpointLatch.countDown();
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}
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public static void breakpointHere() {
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System.out.println("Breakpoint finished!");
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}
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static class DebugThread extends Thread {
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final CountDownLatch runningLatch = new CountDownLatch(1);
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final CountDownLatch breakpointLatch = new CountDownLatch(1);
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public DebugThread() {
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super(new ThreadGroup(null), DEBUG_THREAD_NAME);
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}
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public void run() {
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runningLatch.countDown();
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try {
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breakpointLatch.await();
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} catch (InterruptedException ie) {
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ie.printStackTrace();
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}
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}
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}
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}
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public class NullThreadGroupNameTest extends TestScaffold {
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NullThreadGroupNameTest(String args[]) {
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super(args);
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}
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public static void main(String[] args) throws Exception {
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new NullThreadGroupNameTest(args).startTests();
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}
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protected void runTests() throws Exception {
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startTo("DebugTarget", "breakpointHere", "()V");
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ThreadReference thread = findThread(DebugTarget.DEBUG_THREAD_NAME);
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assertThreadGroupName(thread.threadGroup(), "");
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listenUntilVMDisconnect();
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}
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private ThreadReference findThread(String name) {
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for (ThreadReference thread : vm().allThreads()) {
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if (name.equals(thread.name())) {
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return thread;
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}
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}
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throw new NoSuchElementException("Couldn't find " + name);
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}
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private void assertThreadGroupName(ThreadGroupReference threadGroup, String expectedName) {
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try {
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String name = threadGroup.name();
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if (!expectedName.equals(name)) {
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throw new AssertionError("Unexpected thread group name '" + name + "'");
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}
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} catch (VMDisconnectedException vmde) {
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throw new AssertionError("Likely JVM crash with null thread group name", vmde);
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}
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}
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}
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