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1 /* |
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2 * Copyright (c) 2013, 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 import java.io.BufferedReader; |
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25 import java.io.InputStreamReader; |
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26 import java.lang.Class; |
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27 import java.lang.String; |
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28 import java.lang.System; |
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29 import java.lang.management.ManagementFactory; |
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30 import java.lang.management.RuntimeMXBean; |
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31 import java.util.ArrayList; |
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32 import java.util.List; |
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33 import java.util.concurrent.CyclicBarrier; |
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34 import java.util.regex.Matcher; |
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35 import java.util.regex.Pattern; |
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36 import java.lang.reflect.Field; |
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37 import java.lang.reflect.Modifier; |
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38 import sun.misc.Unsafe; |
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39 import sun.misc.Contended; |
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40 |
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41 /* |
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42 * @test |
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43 * @bug 8012939 |
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44 * @summary \@Contended doesn't work correctly with inheritance |
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45 * |
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46 * @run main/othervm -XX:-RestrictContended Inheritance1 |
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47 */ |
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48 public class Inheritance1 { |
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49 |
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50 private static final Unsafe U; |
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51 private static int ADDRESS_SIZE; |
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52 private static int HEADER_SIZE; |
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53 |
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54 static { |
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55 // steal Unsafe |
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56 try { |
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57 Field unsafe = Unsafe.class.getDeclaredField("theUnsafe"); |
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58 unsafe.setAccessible(true); |
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59 U = (Unsafe) unsafe.get(null); |
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60 } catch (NoSuchFieldException | IllegalAccessException e) { |
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61 throw new IllegalStateException(e); |
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62 } |
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63 |
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64 // When running with CompressedOops on 64-bit platform, the address size |
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65 // reported by Unsafe is still 8, while the real reference fields are 4 bytes long. |
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66 // Try to guess the reference field size with this naive trick. |
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67 try { |
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68 long off1 = U.objectFieldOffset(CompressedOopsClass.class.getField("obj1")); |
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69 long off2 = U.objectFieldOffset(CompressedOopsClass.class.getField("obj2")); |
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70 ADDRESS_SIZE = (int) Math.abs(off2 - off1); |
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71 HEADER_SIZE = (int) Math.min(off1, off2); |
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72 } catch (NoSuchFieldException e) { |
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73 ADDRESS_SIZE = -1; |
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74 } |
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75 } |
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76 |
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77 static class CompressedOopsClass { |
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78 public Object obj1; |
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79 public Object obj2; |
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80 } |
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81 |
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82 public static boolean arePaddedPairwise(Class klass, String field1, String field2) throws Exception { |
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83 Field f1 = klass.getField(field1); |
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84 Field f2 = klass.getField(field2); |
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85 |
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86 int diff = offset(f1) - offset(f2); |
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87 if (diff < 0) { |
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88 // f1 is first |
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89 return (offset(f2) - (offset(f1) + getSize(f1))) > 64; |
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90 } else { |
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91 // f2 is first |
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92 return (offset(f1) - (offset(f2) + getSize(f2))) > 64; |
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93 } |
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94 } |
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95 |
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96 public static boolean sameLayout(Class klass1, Class klass2) throws Exception { |
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97 for (Field f1 : klass1.getDeclaredFields()) { |
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98 Field f2 = klass2.getDeclaredField(f1.getName()); |
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99 if (offset(f1) != offset(f2)) { |
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100 return false; |
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101 } |
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102 } |
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103 |
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104 for (Field f2 : klass1.getDeclaredFields()) { |
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105 Field f1 = klass2.getDeclaredField(f2.getName()); |
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106 if (offset(f1) != offset(f2)) { |
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107 return false; |
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108 } |
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109 } |
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110 |
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111 return true; |
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112 } |
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113 |
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114 public static boolean isStatic(Field field) { |
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115 return Modifier.isStatic(field.getModifiers()); |
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116 } |
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117 |
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118 public static int offset(Field field) { |
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119 if (isStatic(field)) { |
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120 return (int) U.staticFieldOffset(field); |
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121 } else { |
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122 return (int) U.objectFieldOffset(field); |
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123 } |
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124 } |
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125 |
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126 public static int getSize(Field field) { |
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127 Class type = field.getType(); |
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128 if (type == byte.class) { return 1; } |
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129 if (type == boolean.class) { return 1; } |
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130 if (type == short.class) { return 2; } |
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131 if (type == char.class) { return 2; } |
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132 if (type == int.class) { return 4; } |
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133 if (type == float.class) { return 4; } |
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134 if (type == long.class) { return 8; } |
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135 if (type == double.class) { return 8; } |
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136 return ADDRESS_SIZE; |
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137 } |
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138 |
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139 public static void main(String[] args) throws Exception { |
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140 boolean endResult = true; |
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141 |
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142 // --------------- INSTANCE FIELDS --------------------- |
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143 |
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144 if (!arePaddedPairwise(A2_R1.class, "int1", "int2")) { |
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145 System.err.println("A2_R1 failed"); |
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146 endResult &= false; |
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147 } |
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148 |
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149 if (!arePaddedPairwise(A3_R1.class, "int1", "int2")) { |
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150 System.err.println("A3_R1 failed"); |
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151 endResult &= false; |
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152 } |
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153 |
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154 if (!arePaddedPairwise(A1_R2.class, "int1", "int2")) { |
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155 System.err.println("A1_R2 failed"); |
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156 endResult &= false; |
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157 } |
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158 |
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159 if (!arePaddedPairwise(A2_R2.class, "int1", "int2")) { |
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160 System.err.println("A2_R2 failed"); |
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161 endResult &= false; |
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162 } |
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163 |
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164 if (!arePaddedPairwise(A3_R2.class, "int1", "int2")) { |
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165 System.err.println("A3_R2 failed"); |
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166 endResult &= false; |
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167 } |
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168 |
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169 if (!arePaddedPairwise(A1_R3.class, "int1", "int2")) { |
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170 System.err.println("A1_R3 failed"); |
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171 endResult &= false; |
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172 } |
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173 |
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174 if (!arePaddedPairwise(A2_R3.class, "int1", "int2")) { |
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175 System.err.println("A2_R3 failed"); |
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176 endResult &= false; |
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177 } |
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178 |
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179 if (!arePaddedPairwise(A3_R3.class, "int1", "int2")) { |
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180 System.err.println("A3_R3 failed"); |
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181 endResult &= false; |
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182 } |
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183 |
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184 System.out.println(endResult ? "Test PASSES" : "Test FAILS"); |
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185 if (!endResult) { |
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186 throw new Error("Test failed"); |
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187 } |
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188 } |
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189 |
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190 public static class R1 { |
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191 public int int1; |
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192 } |
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193 |
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194 public static class R2 { |
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195 @Contended |
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196 public int int1; |
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197 } |
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198 |
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199 @Contended |
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200 public static class R3 { |
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201 public int int1; |
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202 } |
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203 |
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204 public static class A1_R1 extends R1 { |
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205 public int int2; |
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206 } |
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207 |
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208 public static class A2_R1 extends R1 { |
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209 @Contended |
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210 public int int2; |
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211 } |
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212 |
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213 @Contended |
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214 public static class A3_R1 extends R1 { |
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215 public int int2; |
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216 } |
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217 |
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218 public static class A1_R2 extends R2 { |
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219 public int int2; |
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220 } |
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221 |
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222 public static class A2_R2 extends R2 { |
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223 @Contended |
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224 public int int2; |
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225 } |
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226 |
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227 @Contended |
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228 public static class A3_R2 extends R2 { |
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229 public int int2; |
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230 } |
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231 |
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232 public static class A1_R3 extends R3 { |
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233 public int int2; |
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234 } |
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235 |
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236 public static class A2_R3 extends R3 { |
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237 @Contended |
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238 public int int2; |
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239 } |
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240 |
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241 @Contended |
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242 public static class A3_R3 extends R3 { |
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243 public int int2; |
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244 } |
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245 |
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246 |
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247 } |
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248 |