1 /* 2 * Copyright (c) 2009, 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 /* @test 25 @bug 6713352 26 @summary Deadlock in JFileChooser with synchronized custom FileSystemView 27 @author Pavel Porvatov 28 @modules java.desktop/sun.awt.shell 29 @run main bug6713352 30 */ 31 32 import sun.awt.shell.ShellFolder; 33 34 import javax.swing.*; 35 import javax.swing.filechooser.FileSystemView; 36 import java.io.File; 37 import java.io.FileNotFoundException; 38 import java.io.IOException; 39 40 public class bug6713352 { 41 public static void main(String[] args) throws Exception { 42 SwingUtilities.invokeAndWait(new Runnable() { 43 public void run() { 44 String tempDir = System.getProperty("java.io.tmpdir"); 45 46 if (tempDir == null || !new File(tempDir).isDirectory()) { 47 tempDir = System.getProperty("user.home"); 48 } 49 50 MyFileSystemView systemView = new MyFileSystemView(); 51 52 synchronized (systemView) { // Get SystemView lock 53 new JFileChooser(systemView); 54 55 // Wait a little bit. BasicDirectoryModel will lock Invoker and stop on 56 // the bug6713352.MyFileSystemView.getFiles() method 57 try { 58 Thread.sleep(5000); 59 } catch (InterruptedException e) { 60 throw new RuntimeException(e); 61 } 62 63 try { 64 System.out.println("Try to get Invokers lock"); 65 66 ShellFolder.getShellFolder(new File(tempDir)).listFiles(true); 67 } catch (FileNotFoundException e) { 68 throw new RuntimeException(e); 69 } 70 } 71 72 // To avoid RejectedExecutionException in BasicDirectoryModel wait a second 73 try { 74 Thread.sleep(1000); 75 } catch (InterruptedException e) { 76 throw new RuntimeException(e); 77 } 78 } 79 }); 80 } 81 82 private static class MyFileSystemView extends FileSystemView { 83 84 public File createNewFolder(File containingDir) throws IOException { 85 return null; 86 } 87 88 public File[] getFiles(File dir, boolean useFileHiding) { 89 System.out.println("getFiles start"); 90 91 File[] result; 92 93 synchronized (this) { 94 result = super.getFiles(dir, useFileHiding); 95 } 96 97 System.out.println("getFiles finished"); 98 99 return result; 100 } 101 102 public synchronized Boolean isTraversable(File f) { 103 return super.isTraversable(f); 104 } 105 } 106 }