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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * 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).

 *

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 * 2 along with this work; if not, write to the Free Software Foundation,

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/*

 * @test

 * @ignore This test has huge memory requirements

 * @bug 8021204

 * @summary Test constructor BigInteger(String val, int radix) on very long string

 * @run main/othervm -Xshare:off -Xmx8g StringConstructorOverflow

 * @author Dmitry Nadezhin

 */

import java.math.BigInteger;

public class StringConstructorOverflow {

    // String with hexadecimal value pow(2,pow(2,34))+1

    private static String makeLongHexString() {

        StringBuilder sb = new StringBuilder();

        sb.append('1');

        for (int i = 0; i < (1 << 30) - 1; i++) {

            sb.append('0');

        }

        sb.append('1');

        return sb.toString();

    }

    public static void main(String[] args) {

        try {

            BigInteger bi = new BigInteger(makeLongHexString(), 16);

            if (bi.compareTo(BigInteger.ONE) <= 0) {

                throw new RuntimeException("Incorrect result " + bi.toString());

            }

        } catch (ArithmeticException e) {

            // expected

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

        } catch (OutOfMemoryError e) {

            // possible

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

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

        }

    }

}