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/*
* Copyright (c) 2019, 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
* @summary Test failure paths for MAP_SYNC FileChannel.map of non-DAX files
* @modules java.base/jdk.internal.misc
* @run main MapSyncFail true
* @run main MapSyncFail false
*/
import java.io.*;
import java.nio.*;
import java.util.*;
import java.nio.channels.*;
import jdk.nio.mapmode.*;
import jdk.internal.misc.Unsafe;
public class MapSyncFail {
public static final int K = 1024;
public static void main(String[] args) throws Exception {
if (args.length != 1) {
throw new Exception("Expected true or false as argument");
}
boolean is_rw = Boolean.valueOf(args[0]);
FileChannel.MapMode mode = (is_rw ? ExtendedMapMode.READ_WRITE_SYNC : ExtendedMapMode.READ_ONLY_SYNC);
// it is assumed that /tmp is not a DAX file system
File file = File.createTempFile("MapSyncFail", null);
file.deleteOnExit();
long filesize = (8 * K);
try (RandomAccessFile raf = new RandomAccessFile(file, "rw")) {
raf.setLength(filesize);
FileChannel fc = raf.getChannel();
MappedByteBuffer mbb = fc.map(mode, 0, filesize);
} catch(IOException ioe) {
// when writeback is enabled for the current os/cpu
// combination the underlying mmap should be attempted and
// the map call should fail with IOException
if (!Unsafe.isWritebackEnabled()) {
throw new Exception("IOException not expected");
}
System.out.println("caught " + ioe);
ioe.printStackTrace();
return;
} catch (UnsupportedOperationException uoe) {
// when writeback is not enabled for the current os/cpu
// combination the mmap should not be attempted and the
// map call should fail with UnsupportedOperationException
if (Unsafe.isWritebackEnabled()) {
throw new Exception("UnsupportedOperationException not expected");
}
System.out.println("caught " + uoe);
uoe.printStackTrace();
return;
}
throw new Exception("expected IOException or UnsupportedOperationException");
}
}
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