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annotate test/compiler/6851282/Test.java @ 1552:c18cbe5936b8

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6941466: Oracle rebranding changes for Hotspot repositories Summary: Change all the Sun copyrights to Oracle copyright Reviewed-by: ohair
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date Thu, 27 May 2010 19:08:38 -0700
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1 /*
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2 * Copyright (c) 2009, 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
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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 6851282
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28 * @summary JIT miscompilation results in null entry in array when using CompressedOops
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29 *
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30 * @run main/othervm/timeout=600 -Xmx256m -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops Test
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31 */
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32
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33 import java.util.ArrayList;
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34 import java.util.List;
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35
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36 public class Test {
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37 void foo(A a, A[] as) {
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38 for (A a1 : as) {
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39 B[] filtered = a.c(a1);
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40 for (B b : filtered) {
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41 if (b == null) {
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42 System.out.println("bug: b == null");
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43 System.exit(97);
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44 }
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45 }
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46 }
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47 }
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48
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49 public static void main(String[] args) {
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50 List<A> as = new ArrayList<A>();
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51 for (int i = 0; i < 5000; i++) {
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52 List<B> bs = new ArrayList<B>();
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53 for (int j = i; j < i + 1000; j++)
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54 bs.add(new B(j));
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55 as.add(new A(bs.toArray(new B[0])));
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56 }
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57 new Test().foo(as.get(0), as.subList(1, as.size()).toArray(new A[0]));
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58 }
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59 }
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60
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61 class A {
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62 final B[] bs;
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63
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64 public A(B[] bs) {
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65 this.bs = bs;
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66 }
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67
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68 final B[] c(final A a) {
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69 return new BoxedArray<B>(bs).filter(new Function<B, Boolean>() {
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70 public Boolean apply(B arg) {
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71 for (B b : a.bs) {
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72 if (b.d == arg.d)
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73 return true;
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74 }
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75 return false;
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76 }
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77 });
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78 }
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79 }
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80
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81 class BoxedArray<T> {
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82
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83 private final T[] array;
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84
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85 BoxedArray(T[] array) {
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86 this.array = array;
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87 }
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88
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89 public T[] filter(Function<T, Boolean> function) {
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90 boolean[] include = new boolean[array.length];
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91 int len = 0;
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92 int i = 0;
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93 while (i < array.length) {
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94 if (function.apply(array[i])) {
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95 include[i] = true;
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96 len += 1;
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97 }
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98 i += 1;
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99 }
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100 T[] result = (T[]) java.lang.reflect.Array.newInstance(array.getClass().getComponentType(), len);
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101 len = 0;
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102 i = 0;
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103 while (len < result.length) {
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104 if (include[i]) {
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105 result[len] = array[i];
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106 len += 1;
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107 }
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108 i += 1;
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109 }
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110 return result;
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111 }
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112 }
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113
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114 interface Function<T, R> {
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115 R apply(T arg);
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116 }
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117
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118 class B {
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119 final int d;
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120 public B(int d) {
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121 this.d = d;
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122 }
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123 }
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124