1 /* 2 * Copyright (c) 2009, 2017, 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 * @key headful 27 * @bug 6713352 28 * @summary Deadlock in JFileChooser with synchronized custom FileSystemView 29 * @author Pavel Porvatov 30 * @modules java.desktop/sun.awt.shell 31 * @run main bug6713352 32 */ 33 34 import sun.awt.shell.ShellFolder; 35 36 import javax.swing.*; 37 import javax.swing.filechooser.FileSystemView; 38 import java.io.File; 39 import java.io.FileNotFoundException; 40 import java.io.IOException; 41 42 public class bug6713352 { 43 public static void main(String[] args) throws Exception { 44 SwingUtilities.invokeAndWait(new Runnable() { 45 public void run() { 46 String tempDir = System.getProperty("java.io.tmpdir"); 47 48 if (tempDir == null || !new File(tempDir).isDirectory()) { 49 tempDir = System.getProperty("user.home"); 50 } 51 52 MyFileSystemView systemView = new MyFileSystemView(); 53 54 synchronized (systemView) { // Get SystemView lock 55 new JFileChooser(systemView); 56 57 // Wait a little bit. BasicDirectoryModel will lock Invoker and stop on 58 // the bug6713352.MyFileSystemView.getFiles() method 59 try { 60 Thread.sleep(5000); 61 } catch (InterruptedException e) { 62 throw new RuntimeException(e); 63 } 64 65 try { 66 System.out.println("Try to get Invokers lock"); 67 68 ShellFolder.getShellFolder(new File(tempDir)).listFiles(true); 69 } catch (FileNotFoundException e) { 70 throw new RuntimeException(e); 71 } 72 } 73 74 // To avoid RejectedExecutionException in BasicDirectoryModel wait a second 75 try { 76 Thread.sleep(1000); 77 } catch (InterruptedException e) { 78 throw new RuntimeException(e); 79 } 80 } 81 }); 82 } 83 84 private static class MyFileSystemView extends FileSystemView { 85 86 public File createNewFolder(File containingDir) throws IOException { 87 return null; 88 } 89 90 public File[] getFiles(File dir, boolean useFileHiding) { 91 System.out.println("getFiles start"); 92 93 File[] result; 94 95 synchronized (this) { 96 result = super.getFiles(dir, useFileHiding); 97 } 98 99 System.out.println("getFiles finished"); 100 101 return result; 102 } 103 104 public synchronized Boolean isTraversable(File f) { 105 return super.isTraversable(f); 106 } 107 } 108 }