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annotate graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/HotSpotResolvedJavaFieldImpl.java @ 21624:dcf65e8b9fd9
Merge.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Mon, 01 Jun 2015 00:44:38 +0200 |
parents | 48c1ebd24120 |
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1 /* |
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2 * Copyright (c) 2011, 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 package com.oracle.jvmci.hotspot; |
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24 |
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25 import static com.oracle.jvmci.hotspot.HotSpotJVMCIRuntime.*; |
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26 import static com.oracle.jvmci.hotspot.HotSpotResolvedJavaFieldImpl.Options.*; |
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27 import static com.oracle.jvmci.hotspot.HotSpotResolvedObjectTypeImpl.*; |
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28 |
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29 import java.lang.annotation.*; |
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30 import java.lang.reflect.*; |
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31 |
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32 import com.oracle.jvmci.common.*; |
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33 import com.oracle.jvmci.meta.*; |
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34 import com.oracle.jvmci.options.*; |
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35 |
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36 /** |
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37 * Represents a field in a HotSpot type. |
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38 */ |
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39 public class HotSpotResolvedJavaFieldImpl implements HotSpotResolvedJavaField, HotSpotProxified { |
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40 |
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41 static class Options { |
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42 //@formatter:off |
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43 @Option(help = "Mark well-known stable fields as such.", type = OptionType.Debug) |
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44 public static final OptionValue<Boolean> ImplicitStableValues = new OptionValue<>(true); |
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45 //@formatter:on |
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46 } |
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47 |
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48 private final HotSpotResolvedObjectTypeImpl holder; |
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49 private final String name; |
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50 private JavaType type; |
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51 private final int offset; |
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52 |
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53 /** |
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55 */ | |
56 private final int modifiers; | |
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57 private final LocationIdentity locationIdentity = new FieldLocationIdentity(this); |
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58 |
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59 public static class FieldLocationIdentity extends LocationIdentity { |
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60 HotSpotResolvedJavaField inner; |
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61 |
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62 public FieldLocationIdentity(HotSpotResolvedJavaFieldImpl inner) { |
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63 this.inner = inner; |
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64 } |
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65 |
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66 @Override |
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67 public boolean isImmutable() { |
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68 return false; |
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69 } |
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70 |
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71 @Override |
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72 public boolean equals(Object obj) { |
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73 if (this == obj) { |
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74 return true; |
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75 } |
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76 if (obj instanceof FieldLocationIdentity) { |
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77 FieldLocationIdentity fieldLocationIdentity = (FieldLocationIdentity) obj; |
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78 return inner.equals(fieldLocationIdentity.inner); |
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79 |
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80 } |
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81 return false; |
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82 } |
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83 |
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84 @Override |
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85 public int hashCode() { |
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86 return inner.hashCode(); |
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87 } |
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88 |
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89 @Override |
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90 public String toString() { |
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91 return inner.getName(); |
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92 } |
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93 } |
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94 |
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95 public HotSpotResolvedJavaFieldImpl(HotSpotResolvedObjectTypeImpl holder, String name, JavaType type, long offset, int modifiers) { |
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96 this.holder = holder; |
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97 this.name = name; |
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98 this.type = type; |
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99 assert offset != -1; |
13263 | 100 assert offset == (int) offset : "offset larger than int"; |
101 this.offset = (int) offset; | |
14012 | 102 this.modifiers = modifiers; |
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103 } |
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104 |
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105 @Override |
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106 public boolean equals(Object obj) { |
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107 if (this == obj) { |
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108 return true; |
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109 } |
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110 if (obj instanceof HotSpotResolvedJavaField) { |
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111 HotSpotResolvedJavaFieldImpl that = (HotSpotResolvedJavaFieldImpl) obj; |
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112 if (that.offset != this.offset || that.isStatic() != this.isStatic()) { |
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113 return false; |
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114 } else if (this.holder.equals(that.holder)) { |
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115 assert this.name.equals(that.name) && this.type.equals(that.type); |
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116 return true; |
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117 } |
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118 } |
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119 return false; |
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120 } |
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121 |
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122 @Override |
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123 public int hashCode() { |
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124 return name.hashCode(); |
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125 } |
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126 |
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127 @Override |
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128 public int getModifiers() { |
14012 | 129 return modifiers & getReflectionFieldModifiers(); |
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130 } |
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131 |
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132 @Override |
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133 public boolean isInternal() { |
14012 | 134 return (modifiers & runtime().getConfig().jvmAccFieldInternal) != 0; |
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135 } |
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136 |
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137 /** |
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138 * Determines if a given object contains this field. |
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139 * |
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140 * @return true iff this is a non-static field and its declaring class is assignable from |
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141 * {@code object}'s class |
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142 */ |
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143 public boolean isInObject(Object object) { |
15311
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144 if (isStatic()) { |
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145 return false; |
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146 } |
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147 return getDeclaringClass().isAssignableFrom(HotSpotResolvedObjectTypeImpl.fromObjectClass(object.getClass())); |
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148 } |
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149 |
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Initial implementation of closed world analysis by iteratively expanding the universe starting at method entry points.
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150 @Override |
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151 public HotSpotResolvedObjectTypeImpl getDeclaringClass() { |
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152 return holder; |
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153 } |
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154 |
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155 @Override |
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156 public String getName() { |
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157 return name; |
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158 } |
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159 |
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160 @Override |
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161 public JavaType getType() { |
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162 // Pull field into local variable to prevent a race causing |
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163 // a ClassCastException below |
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164 JavaType currentType = type; |
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165 if (currentType instanceof HotSpotUnresolvedJavaType) { |
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166 // Don't allow unresolved types to hang around forever |
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167 HotSpotUnresolvedJavaType unresolvedType = (HotSpotUnresolvedJavaType) currentType; |
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168 ResolvedJavaType resolved = unresolvedType.reresolve(holder); |
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169 if (resolved != null) { |
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170 type = resolved; |
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171 } |
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172 } |
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173 return type; |
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174 } |
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175 |
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176 public int offset() { |
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177 return offset; |
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178 } |
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179 |
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180 @Override |
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181 public String toString() { |
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182 return format("HotSpotField<%H.%n %t:") + offset + ">"; |
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183 } |
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184 |
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|
185 @Override |
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|
186 public boolean isSynthetic() { |
14012 | 187 return (runtime().getConfig().syntheticFlag & modifiers) != 0; |
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|
188 } |
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|
189 |
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|
190 /** |
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|
191 * Checks if this field has the {@link Stable} annotation. |
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192 * |
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193 * @return true if field has {@link Stable} annotation, false otherwise |
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194 */ |
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|
195 public boolean isStable() { |
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196 if ((runtime().getConfig().jvmAccFieldStable & modifiers) != 0) { |
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197 return true; |
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|
198 } |
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|
199 assert getAnnotation(Stable.class) == null; |
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200 if (ImplicitStableValues.getValue() && isImplicitStableField()) { |
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|
201 return true; |
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202 } |
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203 return false; |
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204 } |
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|
205 |
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|
206 @Override |
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|
207 public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { |
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|
208 Field javaField = toJava(); |
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|
209 if (javaField != null) { |
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210 return javaField.getAnnotation(annotationClass); |
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211 } |
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212 return null; |
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|
213 } |
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|
214 |
20821
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|
215 private Field toJavaCache; |
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216 |
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|
217 private Field toJava() { |
20821
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|
218 if (toJavaCache != null) { |
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|
219 return toJavaCache; |
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220 } |
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|
221 |
13823
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|
222 if (isInternal()) { |
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|
223 return null; |
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|
224 } |
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|
225 try { |
20821
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|
226 return toJavaCache = holder.mirror().getDeclaredField(name); |
19917
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Don't force resolution for unloaded field types
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|
227 } catch (NoSuchFieldException | NoClassDefFoundError e) { |
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228 return null; |
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|
229 } |
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|
230 } |
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|
231 |
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232 private boolean isArray() { |
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233 JavaType fieldType = getType(); |
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234 return fieldType instanceof ResolvedJavaType && ((ResolvedJavaType) fieldType).isArray(); |
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235 } |
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236 |
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237 private boolean isImplicitStableField() { |
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238 if (isSynthetic()) { |
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239 if (isSyntheticImplicitStableField()) { |
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240 return true; |
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241 } |
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242 } else if (isWellKnownImplicitStableField()) { |
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243 return true; |
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244 } |
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245 return false; |
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246 } |
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247 |
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248 private boolean isSyntheticImplicitStableField() { |
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249 assert this.isSynthetic(); |
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250 if (isStatic() && isArray()) { |
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251 if (isFinal() && name.equals("$VALUES") || name.equals("ENUM$VALUES")) { |
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252 // generated int[] field for EnumClass::values() |
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253 return true; |
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254 } else if (name.startsWith("$SwitchMap$") || name.startsWith("$SWITCH_TABLE$")) { |
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255 // javac and ecj generate a static field in an inner class for a switch on an enum |
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256 // named $SwitchMap$p$k$g$EnumClass and $SWITCH_TABLE$p$k$g$EnumClass, respectively |
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257 return true; |
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258 } |
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259 } |
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260 return false; |
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261 } |
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262 |
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263 private boolean isWellKnownImplicitStableField() { |
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264 return WellKnownImplicitStableField.test(this); |
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265 } |
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266 |
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267 static class WellKnownImplicitStableField { |
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268 /** |
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269 * @return {@code true} if the field is a well-known stable field. |
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270 */ |
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271 public static boolean test(HotSpotResolvedJavaField field) { |
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272 return field.equals(STRING_VALUE_FIELD); |
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273 } |
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274 |
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275 private static final ResolvedJavaField STRING_VALUE_FIELD; |
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276 static { |
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277 try { |
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278 MetaAccessProvider metaAccess = runtime().getHostJVMCIBackend().getMetaAccess(); |
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279 STRING_VALUE_FIELD = metaAccess.lookupJavaField(String.class.getDeclaredField("value")); |
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280 } catch (SecurityException | NoSuchFieldException e) { |
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281 throw new JVMCIError(e); |
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282 } |
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283 } |
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284 } |
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285 |
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286 public LocationIdentity getLocationIdentity() { |
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287 return locationIdentity; |
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288 } |
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289 } |