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/*
* Copyright (c) 2011, 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 8022780
* @summary Test division of large values
* @run main/othervm -Xshare:off DivisionOverflow
* @author Dmitry Nadezhin
*/
import java.math.BigInteger;
public class DivisionOverflow {
public static void main(String[] args) {
try {
BigInteger a = BigInteger.ONE.shiftLeft(2147483646);
BigInteger b = BigInteger.ONE.shiftLeft(1568);
BigInteger[] qr = a.divideAndRemainder(b);
BigInteger q = qr[0];
BigInteger r = qr[1];
if (!r.equals(BigInteger.ZERO)) {
throw new RuntimeException("Incorrect signum() of remainder " + r.signum());
}
if (q.bitLength() != 2147482079) {
throw new RuntimeException("Incorrect bitLength() of quotient " + q.bitLength());
}
System.out.println("Division of large values passed without overflow.");
} catch (OutOfMemoryError e) {
// possible
System.err.println("DivisionOverflow skipped: OutOfMemoryError");
System.err.println("Run jtreg with -javaoption:-Xmx8g");
}
}
}
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