047b8bfeb7
Non-Volatile Mapped Byte Buffers Reviewed-by: alanb, kvn, bpb, gromero, darcy, shade, bulasevich, dchuyko
82 lines
3.2 KiB
Java
82 lines
3.2 KiB
Java
/*
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* Copyright (c) 2019, 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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* @summary Test failure paths for MAP_SYNC FileChannel.map of non-DAX files
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* @modules java.base/jdk.internal.misc
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* @run main MapSyncFail true
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* @run main MapSyncFail false
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*/
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import java.io.*;
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import java.nio.*;
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import java.util.*;
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import java.nio.channels.*;
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import jdk.nio.mapmode.*;
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import jdk.internal.misc.Unsafe;
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public class MapSyncFail {
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public static final int K = 1024;
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public static void main(String[] args) throws Exception {
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if (args.length != 1) {
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throw new Exception("Expected true or false as argument");
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}
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boolean is_rw = Boolean.valueOf(args[0]);
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FileChannel.MapMode mode = (is_rw ? ExtendedMapMode.READ_WRITE_SYNC : ExtendedMapMode.READ_ONLY_SYNC);
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// it is assumed that /tmp is not a DAX file system
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File file = File.createTempFile("MapSyncFail", null);
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file.deleteOnExit();
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long filesize = (8 * K);
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try (RandomAccessFile raf = new RandomAccessFile(file, "rw")) {
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raf.setLength(filesize);
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FileChannel fc = raf.getChannel();
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MappedByteBuffer mbb = fc.map(mode, 0, filesize);
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} catch(IOException ioe) {
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// when writeback is enabled for the current os/cpu
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// combination the underlying mmap should be attempted and
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// the map call should fail with IOException
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if (!Unsafe.isWritebackEnabled()) {
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throw new Exception("IOException not expected");
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}
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System.out.println("caught " + ioe);
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ioe.printStackTrace();
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return;
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} catch (UnsupportedOperationException uoe) {
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// when writeback is not enabled for the current os/cpu
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// combination the mmap should not be attempted and the
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// map call should fail with UnsupportedOperationException
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if (Unsafe.isWritebackEnabled()) {
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throw new Exception("UnsupportedOperationException not expected");
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}
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System.out.println("caught " + uoe);
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uoe.printStackTrace();
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return;
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}
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throw new Exception("expected IOException or UnsupportedOperationException");
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}
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}
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