1 /* 2 * Copyright (c) 2011, 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 /** 26 * @test 27 * @bug 7100757 28 * @summary The BitSet.nextSetBit() produces incorrect result in 32bit VM on Sparc 29 * 30 * @run main Test7100757 31 */ 32 33 import java.util.*; 34 35 public class Test7100757 { 36 37 public static final int NBITS = 256; 38 39 public static void main(String[] args) { 40 41 BitSet bs = new BitSet(NBITS); 42 Random rnd = new Random(); 43 long[] ra = new long[(NBITS+63)/64]; 44 45 for(int l=0; l < 5000000; l++) { 46 47 for(int r = 0; r < ra.length; r++) { 48 ra[r] = rnd.nextLong(); 49 } 50 test(ra, bs); 51 } 52 } 53 54 static void test(long[] ra, BitSet bs) { 55 bs.clear(); 56 int bits_set = 0; 57 for(int i = 0, t = 0, b = 0; i < NBITS; i++) { 58 long bit = 1L << b++; 59 if((ra[t]&bit) != 0) { 60 bs.set(i); 61 bits_set++; 62 } 63 if(b == 64) { 64 t++; 65 b = 0; 66 } 67 } 68 for (int i = bs.nextSetBit(0); i >= 0; i = bs.nextSetBit(i+1)) { 69 bits_set--; 70 } 71 72 if (bits_set != 0) { 73 String bs_str = bs.toString(); 74 System.err.printf("bits_set: %d, bs: %s\n", bits_set, bs_str); 75 System.exit(97); 76 } 77 } 78 79 };