100 lines
3.5 KiB
Java
100 lines
3.5 KiB
Java
/*
|
|
* Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
/* @test
|
|
* @bug 6934977
|
|
* @summary Test MappedByteBuffer operations after mapped bye buffer becomes
|
|
* inaccessible
|
|
* @run main/othervm Truncate
|
|
*/
|
|
|
|
import java.io.*;
|
|
import java.nio.*;
|
|
import java.nio.channels.*;
|
|
import java.util.concurrent.Callable;
|
|
|
|
public class Truncate {
|
|
|
|
static final long INITIAL_FILE_SIZE = 32000L;
|
|
static final long TRUNCATED_FILE_SIZE = 512L;
|
|
|
|
public static void main(String[] args) throws Exception {
|
|
File blah = File.createTempFile("blah", null);
|
|
blah.deleteOnExit();
|
|
|
|
final FileChannel fc = new RandomAccessFile(blah, "rw").getChannel();
|
|
fc.position(INITIAL_FILE_SIZE).write(ByteBuffer.wrap("THE END".getBytes()));
|
|
final MappedByteBuffer mbb =
|
|
fc.map(FileChannel.MapMode.READ_WRITE, 0, fc.size());
|
|
boolean truncated;
|
|
try {
|
|
fc.truncate(TRUNCATED_FILE_SIZE);
|
|
truncated = true;
|
|
} catch (IOException ioe) {
|
|
// probably on Windows where a file cannot be truncated when
|
|
// there is a file mapping.
|
|
truncated = false;
|
|
}
|
|
if (truncated) {
|
|
// Test 1: access region that is no longer accessible
|
|
execute(new Callable<Void>() {
|
|
public Void call() {
|
|
mbb.get((int)TRUNCATED_FILE_SIZE + 1);
|
|
mbb.put((int)TRUNCATED_FILE_SIZE + 2, (byte)123);
|
|
return null;
|
|
}
|
|
});
|
|
// Test 2: load buffer into memory
|
|
execute(new Callable<Void>() {
|
|
public Void call() throws IOException {
|
|
mbb.load();
|
|
return null;
|
|
}
|
|
});
|
|
}
|
|
fc.close();
|
|
}
|
|
|
|
// Runs the given task in its own thread. If operating correcting the
|
|
// the thread will terminate with an InternalError as the mapped buffer
|
|
// is inaccessible.
|
|
static void execute(final Callable<?> c) {
|
|
Runnable r = new Runnable() {
|
|
public void run() {
|
|
try {
|
|
Object ignore = c.call();
|
|
} catch (Exception ignore) {
|
|
}
|
|
}
|
|
};
|
|
Thread t = new Thread(r);
|
|
t.setUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
|
|
public void uncaughtException(Thread t, Throwable e) {
|
|
e.printStackTrace();
|
|
}
|
|
});
|
|
t.start();
|
|
try { t.join(); } catch (InterruptedException ignore) { }
|
|
}
|
|
}
|