/*

 * Copyright (c) 2013, 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 6910473

 * @summary Test that bitLength() is not negative

 * @author Dmitry Nadezhin

 */

import java.math.BigInteger;

public class BitLengthOverflow {

    public static void main(String[] args) {

        try {

            BigInteger x = BigInteger.ONE.shiftLeft(Integer.MAX_VALUE); // x = pow(2,Integer.MAX_VALUE)

            if (x.bitLength() != (1L << 31)) {

                throw new RuntimeException("Incorrect bitLength() " + x.bitLength());

            }

            System.out.println("Surprisingly passed with correct bitLength() " + x.bitLength());

        } catch (ArithmeticException e) {

            // expected

            System.out.println("Overflow is reported by ArithmeticException, as expected");

        } catch (OutOfMemoryError e) {

            // possible

            System.err.println("BitLengthOverflow skipped: OutOfMemoryError");

            System.err.println("Run jtreg with -javaoption:-Xmx8g");

        }

    }

}