1 /*

     2  * Copyright (c) 2005, 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     4519200

    27  * @summary Confirm a Thread.stop before start complies with the spec

    28  * @author  Pete Soper

    29  *

    30  * Confirm that a thread that had its stop method invoked before start

    31  * does properly terminate with expected exception behavior. NOTE that

    32  * arbitrary application threads could return from their run methods faster

    33  * than the VM can throw an async exception.

    34  */

    35 public class StopBeforeStart {

    36 

    37     private static final int JOIN_TIMEOUT=10000;

    38 

    39     private class MyThrowable extends Throwable {

    40     }

    41 

    42     private class Catcher implements Thread.UncaughtExceptionHandler {

    43         private boolean nullaryStop;

    44         private Throwable theThrowable;

    45         private Throwable expectedThrowable;

    46         private boolean exceptionThrown;

    47 

    48         Catcher(boolean nullaryStop) {

    49             this.nullaryStop = nullaryStop;

    50             if (!nullaryStop) {

    51                 expectedThrowable = new MyThrowable();

    52             }

    53         }

    54 

    55         public void uncaughtException(Thread t, Throwable th) {

    56             exceptionThrown = true;

    57             theThrowable = th;

    58         }

    59 

    60         void check(String label) throws Throwable {

    61             if (!exceptionThrown) {

    62                 throw new RuntimeException(label +

    63                         " test:" + " missing uncaught exception");

    64             }

    65 

    66             if (nullaryStop) {

    67                 if (! (theThrowable instanceof ThreadDeath)) {

    68                     throw new RuntimeException(label +

    69                         " test:" + " expected ThreadDeath in uncaught handler");

    70                 }

    71             } else if (theThrowable != expectedThrowable) {

    72                 throw new RuntimeException(label +

    73                         " test:" + " wrong Throwable in uncaught handler");

    74             }

    75         }

    76     }

    77 

    78     private class MyRunnable implements Runnable {

    79         public void run() {

    80             while(true)

    81                 ;

    82         }

    83     }

    84 

    85     private class MyThread extends Thread {

    86         public void run() {

    87             while(true)

    88                 ;

    89         }

    90     }

    91 

    92 

    93     public static void main(String args[]) throws Throwable {

    94         (new StopBeforeStart()).doit();

    95         System.out.println("Test passed");

    96     }

    97 

    98     private void doit() throws Throwable {

    99 

   100         runit(false, new Thread(new MyRunnable()),"Thread");

   101         runit(true, new Thread(new MyRunnable()),"Thread");

   102         runit(false, new MyThread(),"Runnable");

   103         runit(true, new MyThread(),"Runnable");

   104     }

   105 

   106     private void runit(boolean nullaryStop, Thread thread,

   107                         String type) throws Throwable {

   108 

   109         Catcher c = new Catcher(nullaryStop);

   110         thread.setUncaughtExceptionHandler(c);

   111 

   112         if (nullaryStop) {

   113             thread.stop();

   114         } else {

   115             thread.stop(c.expectedThrowable);

   116         }

   117 

   118         thread.start();

   119         thread.join(JOIN_TIMEOUT);

   120 

   121         if (thread.getState() != Thread.State.TERMINATED) {

   122 

   123             thread.stop();

   124 

   125             // Under high load this could be a false positive

   126             throw new RuntimeException(type +

   127                         " test:" + " app thread did not terminate");

   128         }

   129 

   130         c.check(type);

   131     }

   132 }