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* version 2 for more details (a copy is included in the LICENSE file that
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/* @test
@bug 6741890
@summary Deadlock in Win32ShellFolderManager2
@author Pavel Porvatov
@run main bug6741890
*/
import sun.awt.shell.ShellFolder;
import sun.awt.OSInfo;
import java.io.File;
import java.lang.reflect.Field;
import java.util.concurrent.Callable;
public class bug6741890 {
/**
* This mux is used to prevent NPE in the isLink and isFileSystem methods
*/
private static final Object mux = new Object();
private static final int COUNT = 100000;
public static void main(String[] args) throws Exception {
if (OSInfo.getOSType() != OSInfo.OSType.WINDOWS) {
System.out.println("The test is applicable only for Windows. Skipped.");
return;
}
String tmpDir = System.getProperty("java.io.tmpdir");
if (tmpDir.length() == 0) { //'java.io.tmpdir' isn't guaranteed to be defined
tmpDir = System.getProperty("user.home");
}
final ShellFolder tmpFile = ShellFolder.getShellFolder(new File(tmpDir));
System.out.println("Temp directory: " + tmpDir);
System.out.println("Stress test was run");
Thread thread = new Thread() {
public void run() {
while (!isInterrupted()) {
ShellFolder.invoke(new Callable<Void>() {
public Void call() throws Exception {
synchronized (mux) {
tmpFile.isFileSystem();
tmpFile.isLink();
}
return null;
}
});
}
}
};
thread.start();
for (int i = 0; i < COUNT; i++) {
synchronized (mux) {
clearField(tmpFile, "cachedIsLink");
clearField(tmpFile, "cachedIsFileSystem");
}
tmpFile.isFileSystem();
tmpFile.isLink();
}
thread.interrupt();
thread.join();
System.out.println("Test passed successfully");
}
private static void clearField(Object o, String fieldName) throws Exception {
Field field = o.getClass().getDeclaredField(fieldName);
field.setAccessible(true);
field.set(o, null);
}
}