1 /*
   2  * Copyright (c) 2001, 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 4513488
  27  *  @summary Test for JDI: Internal JDI helper threads should setDaemon(true)
  28  *
  29  *  @author Tim Bell
  30  *
  31  *  @modules jdk.jdi
  32  *  @run build TestScaffold VMConnection TargetListener TargetAdapter
  33  *  @run compile -g DebuggerThreadTest.java
  34  *  @run driver DebuggerThreadTest
  35  */
  36 import com.sun.jdi.*;
  37 import com.sun.jdi.event.*;
  38 import com.sun.jdi.request.*;
  39 
  40 import java.util.*;
  41 
  42     /********** target program **********/
  43 
  44 class DebuggerThreadTarg {
  45     public void ready() {
  46     }
  47     public static void main(String[] args){
  48         System.out.println("Howdy!");
  49         DebuggerThreadTarg targ = new DebuggerThreadTarg();
  50         targ.ready();
  51         System.out.println("Goodbye from DebuggerThreadTarg!");
  52     }
  53 }
  54 
  55     /********** test program **********/
  56 
  57 public class DebuggerThreadTest extends TestScaffold {
  58 
  59     DebuggerThreadTest (String args[]) {
  60         super(args);
  61     }
  62 
  63     public static void main(String[] args)      throws Exception {
  64         new DebuggerThreadTest(args).startTests();
  65     }
  66 
  67     /*
  68      * Move to top ThreadGroup and dump all threads.
  69      */
  70     public void dumpThreads() {
  71         ThreadGroup tg = Thread.currentThread().getThreadGroup();
  72         ThreadGroup parent = tg.getParent();
  73         while (parent != null) {
  74             tg = parent;
  75             parent = tg.getParent();
  76         }
  77         int listThreads = tg.activeCount();
  78         Thread list[] = new Thread[listThreads * 2];
  79         int gotThreads = tg.enumerate(list, true);
  80         for (int i = 0; i < Math.min(gotThreads, list.length); i++){
  81             Thread t = list[i];
  82             String groupName = t.getThreadGroup().getName();
  83 
  84             System.out.println("Thread [" + i + "] group = '" +
  85                                groupName +
  86                                "' name = '" + t.getName() +
  87                                "' daemon = " + t.isDaemon());
  88 
  89             if (groupName.startsWith("JDI ") &&
  90                 (! t.isDaemon())) {
  91                 failure("FAIL: non-daemon thread '" + t.getName() +
  92                         "' found in ThreadGroup '" + groupName + "'");
  93             }
  94 
  95         }
  96     }
  97 
  98     protected void runTests() throws Exception {
  99         try {
 100             /*
 101              * Get to the top of ready()
 102              */
 103             startTo("DebuggerThreadTarg", "ready", "()V");
 104 
 105             dumpThreads();
 106 
 107             listenUntilVMDisconnect();
 108 
 109         } finally {
 110             /*
 111              * deal with results of test
 112              * if anything has called failure("foo") testFailed will be true
 113              */
 114             if (!testFailed) {
 115                 println("DebuggerThreadTest: passed");
 116             } else {
 117                 throw new Exception("DebuggerThreadTest: failed");
 118             }
 119         }
 120         return;
 121     }
 122 }