1 /* 2 * Copyright (c) 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 6945316 26 @summary The Win32ShellFolderManager2.isFileSystemRoot can throw NPE 27 @author Pavel Porvatov 28 @run main bug6945316 29 */ 30 31 import sun.awt.OSInfo; 32 import sun.awt.shell.ShellFolder; 33 34 import java.awt.*; 35 import java.io.File; 36 import java.util.concurrent.CountDownLatch; 37 38 public class bug6945316 { 39 public static void main(String[] args) throws Exception { 40 if (OSInfo.getOSType() != OSInfo.OSType.WINDOWS) { 41 System.out.println("The test is suitable only for Windows OS. Skipped."); 42 43 return; 44 } 45 46 // Init toolkit because it shouldn't be interrupted while initialization 47 Toolkit.getDefaultToolkit(); 48 49 // Init the sun.awt.shell.Win32ShellFolderManager2.drives field 50 ShellFolder.get("fileChooserComboBoxFolders"); 51 52 // To get NPE the path must obey the following rules: 53 // path.length() == 3 && path.charAt(1) == ':' 54 final File tempFile = new File("c:\\"); 55 56 for (int i = 0; i < 10000; i++) { 57 final CountDownLatch countDownLatch = new CountDownLatch(1); 58 59 final Thread thread = new Thread() { 60 public void run() { 61 countDownLatch.countDown(); 62 63 ShellFolder.isFileSystemRoot(tempFile); 64 } 65 }; 66 67 thread.start(); 68 69 countDownLatch.await(); 70 71 thread.interrupt(); 72 } 73 } 74 }