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 8003985 |
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44 * @summary Support Contended Annotation - JEP 142 |
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45 * |
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46 * @run main/othervm -XX:-RestrictContended Test8003985 |
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47 */ |
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48 public class Test8003985 { |
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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.getDeclaredField(field1); |
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84 Field f2 = klass.getDeclaredField(field2); |
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85 |
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86 if (isStatic(f1) != isStatic(f2)) { |
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87 return true; // these guys are in naturally disjoint locations |
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88 } |
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89 |
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90 int diff = offset(f1) - offset(f2); |
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91 if (diff < 0) { |
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92 // f1 is first |
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93 return (offset(f2) - (offset(f1) + getSize(f1))) > 64; |
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94 } else { |
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95 // f2 is first |
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96 return (offset(f1) - (offset(f2) + getSize(f2))) > 64; |
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97 } |
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98 } |
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99 |
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100 public static boolean isPadded(Class klass, String field1) throws Exception { |
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101 Field f1 = klass.getDeclaredField(field1); |
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102 |
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103 if (isStatic(f1)) { |
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104 return offset(f1) > 128 + 64; |
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105 } |
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106 |
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107 return offset(f1) > 64; |
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108 } |
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109 |
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110 public static boolean sameLayout(Class klass1, Class klass2) throws Exception { |
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111 for (Field f1 : klass1.getDeclaredFields()) { |
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112 Field f2 = klass2.getDeclaredField(f1.getName()); |
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113 if (offset(f1) != offset(f2)) { |
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114 return false; |
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115 } |
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116 } |
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117 |
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118 for (Field f2 : klass1.getDeclaredFields()) { |
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119 Field f1 = klass2.getDeclaredField(f2.getName()); |
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120 if (offset(f1) != offset(f2)) { |
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121 return false; |
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122 } |
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123 } |
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124 |
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125 return true; |
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126 } |
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127 |
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128 public static boolean isStatic(Field field) { |
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129 return Modifier.isStatic(field.getModifiers()); |
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130 } |
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131 |
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132 public static int offset(Field field) { |
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133 if (isStatic(field)) { |
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134 return (int) U.staticFieldOffset(field); |
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135 } else { |
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136 return (int) U.objectFieldOffset(field); |
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137 } |
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138 } |
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139 |
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140 public static int getSize(Field field) { |
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141 Class type = field.getType(); |
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142 if (type == byte.class) { return 1; } |
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143 if (type == boolean.class) { return 1; } |
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144 if (type == short.class) { return 2; } |
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145 if (type == char.class) { return 2; } |
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146 if (type == int.class) { return 4; } |
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147 if (type == float.class) { return 4; } |
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148 if (type == long.class) { return 8; } |
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149 if (type == double.class) { return 8; } |
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150 return ADDRESS_SIZE; |
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151 } |
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152 |
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153 public static void main(String[] args) throws Exception { |
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154 boolean endResult = true; |
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155 |
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156 // --------------- INSTANCE FIELDS --------------------- |
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157 |
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158 if (arePaddedPairwise(Test1.class, "int1", "int2") || |
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159 isPadded(Test1.class, "int1") || |
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160 isPadded(Test1.class, "int2")) { |
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161 System.err.println("Test1 failed"); |
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162 endResult &= false; |
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163 } |
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164 |
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165 if (!arePaddedPairwise(Test2.class, "int1", "int2") || |
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166 !isPadded(Test2.class, "int1") || |
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167 isPadded(Test2.class, "int2")) { |
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168 System.err.println("Test2 failed"); |
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169 endResult &= false; |
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170 } |
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171 |
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172 if (!arePaddedPairwise(Test3.class, "int1", "int2") || |
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173 !isPadded(Test3.class, "int1") || |
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174 !isPadded(Test3.class, "int2")) { |
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175 System.err.println("Test3 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(Test4.class, "int1", "int2") || |
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180 !isPadded(Test4.class, "int1") || |
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181 !isPadded(Test4.class, "int2")) { |
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182 System.err.println("Test4 failed"); |
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183 endResult &= false; |
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184 } |
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185 |
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186 if (!arePaddedPairwise(Test5.class, "int1", "int2") || |
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187 !isPadded(Test5.class, "int1") || |
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188 !isPadded(Test5.class, "int2")) { |
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189 System.err.println("Test5 failed"); |
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190 endResult &= false; |
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191 } |
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192 |
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193 if (!arePaddedPairwise(Test6.class, "int1", "int2") || |
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194 !isPadded(Test6.class, "int1") || |
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195 !isPadded(Test6.class, "int2")) { |
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196 System.err.println("Test6 failed"); |
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197 endResult &= false; |
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198 } |
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199 |
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200 if (arePaddedPairwise(Test7.class, "int1", "int2") || |
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201 !isPadded(Test7.class, "int1") || |
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202 !isPadded(Test7.class, "int2")) { |
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203 System.err.println("Test7 failed"); |
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204 endResult &= false; |
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205 } |
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206 |
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207 if (!arePaddedPairwise(Test8.class, "int1", "int2") || |
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208 !isPadded(Test8.class, "int1") || |
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209 !isPadded(Test8.class, "int2")) { |
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210 System.err.println("Test8 failed"); |
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211 endResult &= false; |
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212 } |
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213 |
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214 if (!arePaddedPairwise(Test9.class, "int1", "int2") || |
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215 !isPadded(Test9.class, "int1") || |
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216 !isPadded(Test9.class, "int2")) { |
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217 System.err.println("Test9 failed"); |
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218 endResult &= false; |
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219 } |
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220 |
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221 if (!sameLayout(Test4.class, Test7.class)) { |
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222 System.err.println("Test4 and Test7 have different layouts"); |
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223 endResult &= false; |
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224 } |
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225 |
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226 if (!sameLayout(Test5.class, Test6.class)) { |
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227 System.err.println("Test5 and Test6 have different layouts"); |
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228 endResult &= false; |
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229 } |
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230 |
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231 if (!sameLayout(Test8.class, Test9.class)) { |
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232 System.err.println("Test8 and Test9 have different layouts"); |
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233 endResult &= false; |
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234 } |
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235 |
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236 System.out.println(endResult ? "Test PASSES" : "Test FAILS"); |
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237 if (!endResult) { |
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238 throw new Error("Test failed"); |
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239 } |
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240 } |
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241 |
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242 // ----------------------------------- INSTANCE FIELDS ----------------------------------------- |
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243 |
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244 // naturally packed |
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245 public static class Test1 { |
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246 private int int1; |
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247 private int int2; |
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248 } |
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249 |
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250 // int1 is padded |
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251 public static class Test2 { |
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252 @Contended private int int1; |
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253 private int int2; |
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254 } |
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255 |
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256 // both fields are padded |
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257 public static class Test3 { |
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258 @Contended private int int1; |
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259 @Contended private int int2; |
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260 } |
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261 |
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262 // fields are padded in the singular group |
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263 public static class Test4 { |
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264 @Contended("sameGroup") private int int1; |
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265 @Contended("sameGroup") private int int2; |
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266 } |
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267 |
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268 // fields are padded in disjoint groups |
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269 public static class Test5 { |
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270 @Contended("diffGroup1") private int int1; |
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271 @Contended("diffGroup2") private int int2; |
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272 } |
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273 |
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274 // fields are padded in disjoint groups |
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275 public static class Test6 { |
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276 @Contended private int int1; |
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277 @Contended("diffGroup2") private int int2; |
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278 } |
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279 |
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280 // fields are padded in the singular group |
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281 @Contended |
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282 public static class Test7 { |
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283 private int int1; |
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284 private int int2; |
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285 } |
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286 |
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287 // all fields are padded as the group, and one field is padded specifically |
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288 @Contended |
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289 public static class Test8 { |
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290 @Contended private int int1; |
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291 private int int2; |
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292 } |
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293 |
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294 // all fields are padded as the group, and one field is padded specifically |
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295 @Contended |
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296 public static class Test9 { |
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297 @Contended("group") private int int1; |
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298 private int int2; |
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299 } |
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300 |
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301 } |
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302 |
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