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 { main(String[] args)38 public static void main(String[] args) throws Exception { 39 if (args.length == 0) { 40 runTest(); 41 } else { 42 doTest(); 43 } 44 } 45 runTest()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 doTest()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 run()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 } 105