1 /*

     2  * Copyright (c) 2007, 2010, 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 /* @test

    25    @bug  6526376

    26    @summary DeleteOnExitHook.add() produces NullPointerException

    27  */

    28 

    29 import java.io.*;

    30 

    31 /* NullPointerException in exec'ed process if fails.

    32  * This testcase is timing sensitive. It may sometimes pass even with this bug

    33  * present, but will never fail without it.

    34  */

    35 

    36 public class DeleteOnExitNPE implements Runnable

    37 {

    38     public static void main(String[] args) throws Exception {

    39         if (args.length == 0) {

    40             runTest();

    41         } else {

    42             doTest();

    43         }

    44     }

    45 

    46     public static void runTest() throws Exception {

    47         String cmd = System.getProperty("java.home") + File.separator +

    48                      "bin" + File.separator + "java" +

    49                      " -classpath " + System.getProperty("test.classes");

    50         Process process = Runtime.getRuntime().exec(cmd +  " DeleteOnExitNPE -test");

    51         BufferedReader isReader = new BufferedReader(new InputStreamReader(process.getInputStream()));

    52         BufferedReader esReader = new BufferedReader(new InputStreamReader(process.getErrorStream()));

    53 

    54         process.waitFor();

    55 

    56         boolean failed = false;

    57         String str;

    58         while ((str = isReader.readLine()) != null) {

    59             failed = true;

    60             System.out.println(str);

    61         }

    62         while ((str = esReader.readLine()) != null) {

    63             failed = true;

    64             System.err.println(str);

    65         }

    66 

    67         if (failed)

    68             throw new RuntimeException("Failed: No output should have been received from the process");

    69     }

    70 

    71     public static void doTest() {

    72         try {

    73             File file = File.createTempFile("DeleteOnExitNPE", null);

    74             file.deleteOnExit();

    75 

    76             Thread thread = new Thread(new DeleteOnExitNPE());

    77             thread.start();

    78 

    79             try {

    80                 Thread.sleep(2000);

    81             } catch (InterruptedException ie) {

    82                 ie.printStackTrace();

    83             }

    84 

    85             System.exit(0);

    86         } catch (IOException ioe) {

    87             ioe.printStackTrace();

    88         }

    89     }

    90 

    91     public void run() {

    92         File file = new File("xxyyzz");

    93 

    94         try {

    95             for (;;) {

    96                 file.deleteOnExit();

    97             }

    98         } catch (IllegalStateException ise) {

    99             // ignore. This is ok.

   100             // Trying to add a file to the list of files marked as deleteOnExit when

   101             // shutdown is in progress and the DeleteOnExitHook is running.

   102         }

   103     }

   104 }