110 lines
3.4 KiB
Java
110 lines
3.4 KiB
Java
/*
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* Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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@bug 6741890 8171363
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@summary Deadlock in Win32ShellFolderManager2
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@author Pavel Porvatov
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@modules java.desktop/sun.awt
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java.desktop/sun.awt.shell:+open
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@run main bug6741890
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*/
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import sun.awt.shell.ShellFolder;
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import sun.awt.OSInfo;
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import java.io.File;
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import java.lang.reflect.Field;
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import java.util.concurrent.Callable;
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public class bug6741890 {
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/**
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* This mux is used to prevent NPE in the isLink and isFileSystem methods
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*/
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private static final Object mux = new Object();
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private static final int COUNT = 100000;
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public static void main(String[] args) throws Exception {
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if (OSInfo.getOSType() != OSInfo.OSType.WINDOWS) {
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System.out.println("The test is applicable only for Windows. Skipped.");
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return;
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}
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String tmpDir = System.getProperty("java.io.tmpdir");
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if (tmpDir.length() == 0) { //'java.io.tmpdir' isn't guaranteed to be defined
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tmpDir = System.getProperty("user.home");
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}
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final ShellFolder tmpFile = ShellFolder.getShellFolder(new File(tmpDir));
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System.out.println("Temp directory: " + tmpDir);
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System.out.println("Stress test was run");
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Thread thread = new Thread() {
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public void run() {
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while (!isInterrupted()) {
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ShellFolder.invoke(new Callable<Void>() {
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public Void call() throws Exception {
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synchronized (mux) {
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tmpFile.isFileSystem();
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tmpFile.isLink();
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}
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return null;
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}
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});
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}
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}
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};
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thread.start();
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for (int i = 0; i < COUNT; i++) {
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synchronized (mux) {
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clearField(tmpFile, "cachedIsLink");
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clearField(tmpFile, "cachedIsFileSystem");
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}
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tmpFile.isFileSystem();
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tmpFile.isLink();
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}
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thread.interrupt();
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thread.join();
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System.out.println("Test passed successfully");
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}
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private static void clearField(Object o, String fieldName) throws Exception {
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Field field = o.getClass().getDeclaredField(fieldName);
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field.setAccessible(true);
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field.set(o, null);
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}
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}
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