diff -r b7465577320f -r f87353679927 test/jdk/java/math/BigInteger/largeMemory/DivisionOverflow.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/jdk/java/math/BigInteger/largeMemory/DivisionOverflow.java Mon Oct 21 14:04:16 2019 +0800 @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2011, 2019, 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 + * @requires os.maxMemory > 8g + * @run main/othervm -Xshare:off -Xmx8g 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"); + } + } +}