/*

 * Copyright (c) 2015, 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.

 *

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 */

/**

 * @test

 * @bug 8137121

 * @summary (fc) Infinite loop FileChannel.truncate

 * @run main/othervm LoopingTruncate

 */

import java.nio.ByteBuffer;

import java.nio.channels.FileChannel;

import java.nio.file.Files;

import java.nio.file.Path;

import static java.nio.file.StandardOpenOption.*;

public class LoopingTruncate {

    // (int)FATEFUL_SIZE == -3 == IOStatus.INTERRUPTED

    static long FATEFUL_SIZE = 0x1FFFFFFFDL;

    static long TIMEOUT = 10_000; // 10 seconds

    public static void main(String[] args) throws Throwable {

        Path path = Files.createTempFile("LoopingTruncate.tmp", null);

        try {

            Thread th = new Thread(() -> {

                try (FileChannel fc = FileChannel.open(path, CREATE, WRITE)) {

                    fc.position(FATEFUL_SIZE + 1L);

                    fc.write(ByteBuffer.wrap(new byte[] {0}));

                    fc.truncate(FATEFUL_SIZE);

                } catch (Exception e) {

                    throw new RuntimeException(e);

                }});

            th.start();

            th.join(TIMEOUT);

            if (th.isAlive()) {

                th.interrupt();

                throw new RuntimeException("Failed to complete on time");

            }

        } finally {

            Files.deleteIfExists(path);

        }

    }

}