Mercurial > hg > graal-jvmci-8

annotate jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotResolvedJavaFieldImpl.java @ 24225:a2dbb6fcc923

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Added tag jvmci-0.33 for changeset 3aed4cb813f4
author Doug Simon <doug.simon@oracle.com>
date Fri, 18 Aug 2017 22:47:33 +0200
parents 813c28963a9e
children
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1 /*
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2 * Copyright (c) 2011, 2017, 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.HotSpotModifiers.jvmFieldModifiers;
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26 import static jdk.vm.ci.hotspot.HotSpotVMConfig.config;
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27
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28 import java.lang.annotation.Annotation;
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29 import java.lang.reflect.Field;
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30
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31 import jdk.vm.ci.meta.JavaType;
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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 JavaType type;
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41 private final int offset;
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42 private final short index;
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43
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44 /**
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45 * This value contains all flags as stored in the VM including internal ones.
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46 */
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47 private final int modifiers;
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48
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49 HotSpotResolvedJavaFieldImpl(HotSpotResolvedObjectTypeImpl holder, JavaType type, long offset, int modifiers, int index) {
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50 this.holder = holder;
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51 this.type = type;
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52 this.index = (short) index;
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53 this.offset = (int) offset;
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54 this.modifiers = modifiers;
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55 assert this.index == index;
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56 assert offset != -1;
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57 assert offset == (int) offset : "offset larger than int";
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58 }
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59
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60 @Override
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61 public boolean equals(Object obj) {
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62 if (this == obj) {
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63 return true;
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64 }
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65 if (obj instanceof HotSpotResolvedJavaField) {
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66 HotSpotResolvedJavaFieldImpl that = (HotSpotResolvedJavaFieldImpl) obj;
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67 if (that.offset != this.offset || that.isStatic() != this.isStatic()) {
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68 return false;
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69 } else if (this.holder.equals(that.holder)) {
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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 holder.hashCode() ^ offset;
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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 & 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 holder.createFieldInfo(index).getName();
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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().jvmAccSynthetic & 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 toJava() {
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181 if (isInternal()) {
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182 return null;
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183 }
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184 try {
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11f0412408cd 8173912: [JVMCI] fix memory overhead of JVMCI
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185 return holder.mirror().getDeclaredField(getName());
19917
6575b4e3f629 Don't force resolution for unloaded field types
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186 } catch (NoSuchFieldException | NoClassDefFoundError e) {
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187 return null;
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188 }
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189 }
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190 }