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