Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotResolvedJavaFieldImpl.java @ 23703:9ac04c6047c8
sync with jdk9 changes for JDK-8159613
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 21 Jun 2016 09:48:02 +0200 |
parents | 1d4ce2d19e52 |
children | d6bd0b9cd0b6 |
rev | line source |
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1 /* |
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2 * Copyright (c) 2011, 2015, 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 package jdk.vm.ci.hotspot; |
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24 |
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25 import static jdk.vm.ci.hotspot.HotSpotVMConfig.config; |
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26 |
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27 import java.lang.annotation.Annotation; |
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28 import java.lang.reflect.Field; |
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29 |
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30 import jdk.vm.ci.meta.JavaType; |
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31 import jdk.vm.ci.meta.ModifiersProvider; |
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32 import jdk.vm.ci.meta.ResolvedJavaType; |
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33 |
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34 /** |
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35 * Represents a field in a HotSpot type. |
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36 */ |
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37 class HotSpotResolvedJavaFieldImpl implements HotSpotResolvedJavaField { |
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38 |
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39 private final HotSpotResolvedObjectTypeImpl holder; |
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40 private final String name; |
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41 private JavaType type; |
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42 private final int offset; |
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43 |
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44 /** |
14012 | 45 * This value contains all flags as stored in the VM including internal ones. |
46 */ | |
47 private final int modifiers; | |
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48 |
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49 HotSpotResolvedJavaFieldImpl(HotSpotResolvedObjectTypeImpl holder, String name, JavaType type, long offset, int modifiers) { |
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50 this.holder = holder; |
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51 this.name = name; |
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52 this.type = type; |
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53 assert offset != -1; |
13263 | 54 assert offset == (int) offset : "offset larger than int"; |
55 this.offset = (int) offset; | |
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57 } |
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58 |
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59 @Override |
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60 public boolean equals(Object obj) { |
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61 if (this == obj) { |
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62 return true; |
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63 } |
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64 if (obj instanceof HotSpotResolvedJavaField) { |
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65 HotSpotResolvedJavaFieldImpl that = (HotSpotResolvedJavaFieldImpl) obj; |
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66 if (that.offset != this.offset || that.isStatic() != this.isStatic()) { |
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67 return false; |
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68 } else if (this.holder.equals(that.holder)) { |
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69 assert this.name.equals(that.name) && this.type.equals(that.type); |
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70 return true; |
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71 } |
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72 } |
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73 return false; |
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74 } |
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75 |
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76 @Override |
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77 public int hashCode() { |
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78 return name.hashCode(); |
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79 } |
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80 |
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81 @Override |
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82 public int getModifiers() { |
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83 return modifiers & ModifiersProvider.jvmFieldModifiers(); |
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84 } |
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85 |
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86 @Override |
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87 public boolean isInternal() { |
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88 return (modifiers & config().jvmAccFieldInternal) != 0; |
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89 } |
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90 |
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91 /** |
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92 * Determines if a given object contains this field. |
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93 * |
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94 * @return true iff this is a non-static field and its declaring class is assignable from |
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95 * {@code object}'s class |
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96 */ |
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97 public boolean isInObject(Object object) { |
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98 if (isStatic()) { |
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99 return false; |
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100 } |
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101 return getDeclaringClass().isAssignableFrom(HotSpotResolvedObjectTypeImpl.fromObjectClass(object.getClass())); |
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102 } |
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103 |
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104 @Override |
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105 public HotSpotResolvedObjectTypeImpl getDeclaringClass() { |
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106 return holder; |
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107 } |
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108 |
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109 @Override |
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110 public String getName() { |
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111 return name; |
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112 } |
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113 |
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114 @Override |
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115 public JavaType getType() { |
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116 // Pull field into local variable to prevent a race causing |
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117 // a ClassCastException below |
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118 JavaType currentType = type; |
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119 if (currentType instanceof HotSpotUnresolvedJavaType) { |
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120 // Don't allow unresolved types to hang around forever |
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121 HotSpotUnresolvedJavaType unresolvedType = (HotSpotUnresolvedJavaType) currentType; |
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122 ResolvedJavaType resolved = unresolvedType.reresolve(holder); |
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123 if (resolved != null) { |
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124 type = resolved; |
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125 } |
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126 } |
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127 return type; |
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128 } |
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129 |
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130 public int offset() { |
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131 return offset; |
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132 } |
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133 |
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134 @Override |
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135 public String toString() { |
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136 return format("HotSpotField<%H.%n %t:") + offset + ">"; |
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137 } |
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138 |
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139 @Override |
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140 public boolean isSynthetic() { |
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141 return (config().syntheticFlag & modifiers) != 0; |
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142 } |
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143 |
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144 /** |
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145 * Checks if this field has the {@link Stable} annotation. |
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146 * |
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147 * @return true if field has {@link Stable} annotation, false otherwise |
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148 */ |
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149 public boolean isStable() { |
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150 return (config().jvmAccFieldStable & modifiers) != 0; |
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151 } |
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152 |
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153 @Override |
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154 public Annotation[] getAnnotations() { |
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155 Field javaField = toJava(); |
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156 if (javaField != null) { |
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157 return javaField.getAnnotations(); |
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158 } |
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159 return new Annotation[0]; |
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160 } |
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161 |
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162 @Override |
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163 public Annotation[] getDeclaredAnnotations() { |
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164 Field javaField = toJava(); |
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165 if (javaField != null) { |
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166 return javaField.getDeclaredAnnotations(); |
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167 } |
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168 return new Annotation[0]; |
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169 } |
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170 |
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171 @Override |
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172 public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { |
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173 Field javaField = toJava(); |
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174 if (javaField != null) { |
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175 return javaField.getAnnotation(annotationClass); |
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176 } |
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177 return null; |
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178 } |
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179 |
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180 private Field toJavaCache; |
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181 |
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182 private Field toJava() { |
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183 if (toJavaCache != null) { |
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184 return toJavaCache; |
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185 } |
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186 |
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187 if (isInternal()) { |
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188 return null; |
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189 } |
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190 try { |
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191 return toJavaCache = holder.mirror().getDeclaredField(name); |
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192 } catch (NoSuchFieldException | NoClassDefFoundError e) { |
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193 return null; |
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194 } |
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195 } |
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196 } |