1 /* 2 * Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 8021204 27 * @summary Test constructor BigInteger(String val, int radix) on very long string 28 * @requires os.maxMemory > 8g 29 * @run main/othervm -Xshare:off -Xmx8g StringConstructorOverflow 30 * @author Dmitry Nadezhin 31 */ 32 import java.math.BigInteger; 33 34 public class StringConstructorOverflow { 35 36 // String with hexadecimal value pow(2,pow(2,34))+1 37 private static String makeLongHexString() { 38 StringBuilder sb = new StringBuilder(); 39 sb.append('1'); 40 for (int i = 0; i < (1 << 30) - 1; i++) { 41 sb.append('0'); 42 } 43 sb.append('1'); 44 return sb.toString(); 45 } 46 47 public static void main(String[] args) { 48 try { 49 BigInteger bi = new BigInteger(makeLongHexString(), 16); 50 if (bi.compareTo(BigInteger.ONE) <= 0) { 51 throw new RuntimeException("Incorrect result " + bi.toString()); 52 } 53 } catch (ArithmeticException e) { 54 // expected 55 System.out.println("Overflow is reported by ArithmeticException, as expected"); 56 } catch (OutOfMemoryError e) { 57 // possible 58 System.err.println("StringConstructorOverflow skipped: OutOfMemoryError"); 59 System.err.println("Run jtreg with -javaoption:-Xmx8g"); 60 } 61 } 62 }