1 /*
   2  * Copyright (c) 2003, 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  *  @run build TestScaffold VMConnection TargetListener TargetAdapter
  32  *  @run compile ThreadGroupTest.java
  33  *  @run driver ThreadGroupTest
  34  */
  35 import com.sun.jdi.*;
  36 import com.sun.jdi.connect.*;
  37 import com.sun.jdi.event.*;
  38 import com.sun.jdi.request.*;
  39 
  40 import java.util.*;
  41 
  42     /********** target program **********/
  43 
  44 class ThreadGroupTarg {
  45     public static void main(String[] args){
  46         System.out.println("Howdy!");
  47         System.out.println("Goodbye from ThreadGroupTarg!");
  48     }
  49 }
  50 
  51     /********** test program **********/
  52 
  53 public class ThreadGroupTest extends TestScaffold {
  54     ReferenceType targetClass;
  55     ThreadReference mainThread;
  56 
  57     // Helper thread to fetch VirtualMachineManager
  58     static class Fetcher implements Runnable {
  59         public void run() {
  60             Bootstrap.virtualMachineManager();
  61         }
  62     }
  63 
  64     ThreadGroupTest (String args[]) {
  65         super(args);
  66     }
  67 
  68     public static void main(String[] args)      throws Exception {
  69         // create a random thread group, and run a thread in that group to
  70         // fetch the VirtualMachineManager
  71         ThreadGroup tg = new ThreadGroup("Gus");
  72         Fetcher fetcher = new Fetcher();
  73         Thread thr = new Thread(tg, fetcher);
  74         thr.start();
  75         try {
  76             thr.join();
  77         } catch (InterruptedException x) { }
  78         // now destroy the thread group
  79         tg.destroy();
  80 
  81         // run the test
  82         new ThreadGroupTest(args).startTests();
  83     }
  84 
  85     /********** test core **********/
  86 
  87     protected void runTests() throws Exception {
  88 
  89         // run the target until it completes
  90         startToMain("ThreadGroupTarg");
  91         listenUntilVMDisconnect();
  92 
  93         /*
  94          * deal with results of test
  95          * if anything has called failure("foo") testFailed will be true
  96          */
  97         if (!testFailed) {
  98             println("ThreadGroupTest: passed");
  99         } else {
 100             throw new Exception("ThreadGroupTest: failed");
 101         }
 102     }
 103 }