/*

 * Copyright (c) 2016, 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 8163518

 * @summary Integer overflow when reading in large buffer

 * @requires (os.simpleArch == "x64" & os.maxMemory > 8g)

 * @run main/othervm -Xmx8g OverflowInRead

 */

import java.io.CharArrayReader;

public class OverflowInRead {

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

        char[] a = "_123456789_123456789_123456789_123456789"

                .toCharArray(); // a.length > 33

        try (CharArrayReader car = new CharArrayReader(a)) {

            int len1 = 33;

            char[] buf1 = new char[len1];

            if (car.read(buf1, 0, len1) != len1)

                throw new Exception("Expected to read " + len1 + " chars");

            int len2 = Integer.MAX_VALUE - 32;

            char[] buf2 = new char[len2];

            int expLen2 = a.length - len1;

            if (car.read(buf2, 0, len2) != expLen2)

                throw new Exception("Expected to read " + expLen2 + " chars");

        }

    }

}