1 /*
   2  * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /**
  25  *  @test
  26  *  @bug 4893530
  27  *  @summary If JDI is initially started from a thread group that is subsequently
  28  *           destroyed this should not impact subsequent thread creation by
  29  *           the virtual machine manager.
  30  *
  31  *  @modules jdk.jdi
  32  *  @run build TestScaffold VMConnection TargetListener TargetAdapter
  33  *  @run compile ThreadGroupTest.java
  34  *  @run driver ThreadGroupTest
  35  */
  36 import com.sun.jdi.*;
  37 import com.sun.jdi.connect.*;
  38 import com.sun.jdi.event.*;
  39 import com.sun.jdi.request.*;
  40 
  41 import java.util.*;
  42 
  43     /********** target program **********/
  44 
  45 class ThreadGroupTarg {
  46     public static void main(String[] args){
  47         System.out.println("Howdy!");
  48         System.out.println("Goodbye from ThreadGroupTarg!");
  49     }
  50 }
  51 
  52     /********** test program **********/
  53 
  54 public class ThreadGroupTest extends TestScaffold {
  55     ReferenceType targetClass;
  56     ThreadReference mainThread;
  57 
  58     // Helper thread to fetch VirtualMachineManager
  59     static class Fetcher implements Runnable {
  60         public void run() {
  61             Bootstrap.virtualMachineManager();
  62         }
  63     }
  64 
  65     ThreadGroupTest (String args[]) {
  66         super(args);
  67     }
  68 
  69     public static void main(String[] args)      throws Exception {
  70         // create a random thread group, and run a thread in that group to
  71         // fetch the VirtualMachineManager
  72         ThreadGroup tg = new ThreadGroup("Gus");
  73         Fetcher fetcher = new Fetcher();
  74         Thread thr = new Thread(tg, fetcher);
  75         thr.start();
  76         try {
  77             thr.join();
  78         } catch (InterruptedException x) { }
  79         // now destroy the thread group
  80         tg.destroy();
  81 
  82         // run the test
  83         new ThreadGroupTest(args).startTests();
  84     }
  85 
  86     /********** test core **********/
  87 
  88     protected void runTests() throws Exception {
  89 
  90         // run the target until it completes
  91         startToMain("ThreadGroupTarg");
  92         listenUntilVMDisconnect();
  93 
  94         /*
  95          * deal with results of test
  96          * if anything has called failure("foo") testFailed will be true
  97          */
  98         if (!testFailed) {
  99             println("ThreadGroupTest: passed");
 100         } else {
 101             throw new Exception("ThreadGroupTest: failed");
 102         }
 103     }
 104 }