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20492
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1 /*
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2 * Copyright (c) 2014, 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 * @test
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26 * @bug 8058744
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27 * @summary Invalid pattern-matching of address computations in raw unsafe
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28 * @library /testlibrary
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29 * @run main/othervm -Xbatch UnsafeRaw
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30 */
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31
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32 import com.oracle.java.testlibrary.Utils;
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33 import java.util.Random;
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34
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35 public class UnsafeRaw {
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36 public static class Tests {
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37 public static int int_index(sun.misc.Unsafe unsafe, long base, int index) throws Exception {
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38 return unsafe.getInt(base + (index << 2));
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39 }
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40 public static int long_index(sun.misc.Unsafe unsafe, long base, long index) throws Exception {
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41 return unsafe.getInt(base + (index << 2));
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42 }
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43 public static int int_index_back_ashift(sun.misc.Unsafe unsafe, long base, int index) throws Exception {
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44 return unsafe.getInt(base + (index >> 2));
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45 }
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46 public static int int_index_back_lshift(sun.misc.Unsafe unsafe, long base, int index) throws Exception {
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47 return unsafe.getInt(base + (index >>> 2));
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48 }
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49 public static int long_index_back_ashift(sun.misc.Unsafe unsafe, long base, long index) throws Exception {
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50 return unsafe.getInt(base + (index >> 2));
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51 }
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52 public static int long_index_back_lshift(sun.misc.Unsafe unsafe, long base, long index) throws Exception {
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53 return unsafe.getInt(base + (index >>> 2));
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54 }
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55 public static int int_const_12345678_index(sun.misc.Unsafe unsafe, long base) throws Exception {
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56 int idx4 = 0x12345678;
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57 return unsafe.getInt(base + idx4);
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58 }
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59 public static int long_const_1234567890abcdef_index(sun.misc.Unsafe unsafe, long base) throws Exception {
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60 long idx5 = 0x1234567890abcdefL;
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61 return unsafe.getInt(base + idx5);
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62 }
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63 public static int int_index_mul(sun.misc.Unsafe unsafe, long base, int index) throws Exception {
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64 return unsafe.getInt(base + (index * 4));
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65 }
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66 public static int long_index_mul(sun.misc.Unsafe unsafe, long base, long index) throws Exception {
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67 return unsafe.getInt(base + (index * 4));
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68 }
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69 public static int int_index_mul_scale_16(sun.misc.Unsafe unsafe, long base, int index) throws Exception {
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70 return unsafe.getInt(base + (index * 16));
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71 }
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72 public static int long_index_mul_scale_16(sun.misc.Unsafe unsafe, long base, long index) throws Exception {
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73 return unsafe.getInt(base + (index * 16));
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74 }
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75 }
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76
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77 public static void main(String[] args) throws Exception {
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78 sun.misc.Unsafe unsafe = Utils.getUnsafe();
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79 final int array_size = 128;
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80 final int element_size = 4;
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81 final int magic = 0x12345678;
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82
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83 Random rnd = new Random();
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84
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85 long array = unsafe.allocateMemory(array_size * element_size); // 128 ints
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86 long addr = array + array_size * element_size / 2; // something in the middle to work with
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87 unsafe.putInt(addr, magic);
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88 for (int j = 0; j < 100000; j++) {
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89 if (Tests.int_index(unsafe, addr, 0) != magic) throw new Exception();
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90 if (Tests.long_index(unsafe, addr, 0) != magic) throw new Exception();
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91 if (Tests.int_index_mul(unsafe, addr, 0) != magic) throw new Exception();
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92 if (Tests.long_index_mul(unsafe, addr, 0) != magic) throw new Exception();
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93 {
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94 long idx1 = rnd.nextLong();
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95 long addr1 = addr - (idx1 << 2);
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96 if (Tests.long_index(unsafe, addr1, idx1) != magic) throw new Exception();
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97 }
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98 {
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99 long idx2 = rnd.nextLong();
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100 long addr2 = addr - (idx2 >> 2);
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101 if (Tests.long_index_back_ashift(unsafe, addr2, idx2) != magic) throw new Exception();
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102 }
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103 {
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104 long idx3 = rnd.nextLong();
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105 long addr3 = addr - (idx3 >>> 2);
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106 if (Tests.long_index_back_lshift(unsafe, addr3, idx3) != magic) throw new Exception();
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107 }
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108 {
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109 long idx4 = 0x12345678;
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110 long addr4 = addr - idx4;
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111 if (Tests.int_const_12345678_index(unsafe, addr4) != magic) throw new Exception();
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112 }
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113 {
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114 long idx5 = 0x1234567890abcdefL;
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115 long addr5 = addr - idx5;
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116 if (Tests.long_const_1234567890abcdef_index(unsafe, addr5) != magic) throw new Exception();
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117 }
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118 {
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119 int idx6 = rnd.nextInt();
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120 long addr6 = addr - (idx6 >> 2);
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121 if (Tests.int_index_back_ashift(unsafe, addr6, idx6) != magic) throw new Exception();
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122 }
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123 {
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124 int idx7 = rnd.nextInt();
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125 long addr7 = addr - (idx7 >>> 2);
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126 if (Tests.int_index_back_lshift(unsafe, addr7, idx7) != magic) throw new Exception();
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127 }
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128 {
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129 int idx8 = rnd.nextInt();
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130 long addr8 = addr - (idx8 * 16);
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131 if (Tests.int_index_mul_scale_16(unsafe, addr8, idx8) != magic) throw new Exception();
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132 }
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133 {
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134 long idx9 = rnd.nextLong();
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135 long addr9 = addr - (idx9 * 16);
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136 if (Tests.long_index_mul_scale_16(unsafe, addr9, idx9) != magic) throw new Exception();
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137 }
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138 }
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139 }
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140 }
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