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annotate test/compiler/7100757/Test7100757.java @ 21815:37179dcf830a

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author asaha
date Mon, 20 Oct 2014 23:02:07 -0700
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4bac06a82bc3 7100757: The BitSet.nextSetBit() produces incorrect result in 32bit VM on Sparc
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1 /*
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
4bac06a82bc3 7100757: The BitSet.nextSetBit() produces incorrect result in 32bit VM on Sparc
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 /**
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26 * @test
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27 * @bug 7100757
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28 * @summary The BitSet.nextSetBit() produces incorrect result in 32bit VM on Sparc
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29 *
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30 * @run main/timeout=300 Test7100757
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31 */
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32
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33 import java.util.*;
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34
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35 public class Test7100757 {
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36
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37 public static final int NBITS = 256;
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38
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39 public static void main(String[] args) {
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40
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41 BitSet bs = new BitSet(NBITS);
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42 Random rnd = new Random();
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43 long[] ra = new long[(NBITS+63)/64];
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44
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45 for(int l=0; l < 5000000; l++) {
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46
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47 for(int r = 0; r < ra.length; r++) {
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48 ra[r] = rnd.nextLong();
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49 }
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50 test(ra, bs);
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51 }
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52 }
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53
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54 static void test(long[] ra, BitSet bs) {
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55 bs.clear();
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56 int bits_set = 0;
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57 for(int i = 0, t = 0, b = 0; i < NBITS; i++) {
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58 long bit = 1L << b++;
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59 if((ra[t]&bit) != 0) {
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60 bs.set(i);
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61 bits_set++;
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62 }
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63 if(b == 64) {
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64 t++;
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65 b = 0;
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66 }
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67 }
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68 // Test Long.bitCount()
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69 int check_bits = bs.cardinality();
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70 if (check_bits != bits_set) {
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71 String bs_str = bs.toString();
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72 System.err.printf("cardinality bits: %d != %d bs: %s\n", check_bits, bits_set, bs_str);
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73 System.exit(97);
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74 }
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75 // Test Long.numberOfTrailingZeros()
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76 check_bits = 0;
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77 for (int i = bs.nextSetBit(0); i >= 0; i = bs.nextSetBit(i+1)) {
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78 check_bits++;
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79 }
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80 if (check_bits != bits_set) {
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81 String bs_str = bs.toString();
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82 System.err.printf("nextSetBit bits: %d != %d bs: %s\n", check_bits, bits_set, bs_str);
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83 System.exit(97);
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84 }
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85 // Test Long.numberOfLeadingZeros()
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86 for(int i = bs.length(); i > 0; i = bs.length()) {
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87 bs.clear(i-1);
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88 }
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89 // Test Long.bitCount()
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90 check_bits = bs.cardinality();
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91 if (check_bits != 0) {
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92 String bs_str = bs.toString();
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93 System.err.printf("after clear bits: %d != 0 bs: %s\n", check_bits, bs_str);
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94 System.exit(97);
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95 }
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96 }
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97
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98 };