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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotResolvedJavaField.java @ 10066:295ef03139f4

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HotSpotResolvedJavaField: be more precise about fields that are not embeddable (GRAAL-290)
author Bernhard Urban <bernhard.urban@jku.at>
date Sun, 16 Jun 2013 23:55:22 +0200
parents 5ba3763d6986
children 1397c3e1f642
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1 /*
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2 * Copyright (c) 2011, 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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8872bc0eebdf Renaming hotspot.ri => hotspot.meta.
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24 package com.oracle.graal.hotspot.meta;
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25
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26 import static com.oracle.graal.api.meta.MetaUtil.*;
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27 import static com.oracle.graal.hotspot.HotSpotGraalRuntime.*;
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28 import static com.oracle.graal.phases.GraalOptions.*;
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29
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30 import java.lang.annotation.*;
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31 import java.lang.reflect.*;
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32 import java.util.*;
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33
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34 import com.oracle.graal.api.meta.*;
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35 import com.oracle.graal.graph.*;
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36 import com.oracle.graal.hotspot.*;
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37 import com.oracle.graal.options.*;
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38 import com.oracle.graal.replacements.*;
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39 import com.oracle.graal.replacements.Snippet.SnippetInliningPolicy;
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40 import com.oracle.graal.replacements.SnippetTemplate.Arguments;
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41
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42 /**
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43 * Represents a field in a HotSpot type.
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44 */
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45 public class HotSpotResolvedJavaField extends CompilerObject implements ResolvedJavaField, LocationIdentity {
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46
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47 // Must not conflict with any fields flags used by the VM - the assertion in the constructor
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48 // checks this assumption
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49 private static final int FIELD_INTERNAL_FLAG = 0x80000000;
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50
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51 private static final long serialVersionUID = 7692985878836955683L;
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52 private final HotSpotResolvedObjectType holder;
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53 private final String name;
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54 private final JavaType type;
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55 private final int offset;
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56 private final int flags;
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57 private Constant constant;
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58
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59 public HotSpotResolvedJavaField(HotSpotResolvedObjectType holder, String name, JavaType type, int offset, int flags, boolean internal) {
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60 assert (flags & FIELD_INTERNAL_FLAG) == 0;
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61 this.holder = holder;
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62 this.name = name;
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63 this.type = type;
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64 assert offset != -1;
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65 this.offset = offset;
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66 if (internal) {
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67 this.flags = flags | FIELD_INTERNAL_FLAG;
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68 } else {
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69 this.flags = flags;
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70 }
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71 }
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72
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73 @Override
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74 public int getModifiers() {
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75 return flags & Modifier.fieldModifiers();
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76 }
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77
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78 @Override
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79 public boolean isInternal() {
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80 return (flags & FIELD_INTERNAL_FLAG) != 0;
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81 }
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82
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83 /**
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84 * if the compiler is configured for AOT mode, {@link #readConstantValue(Constant)} should be
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85 * only called for snippets or replacements.
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86 */
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87 private static boolean isCalledForSnippets() {
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88 HotSpotRuntime runtime = graalRuntime().getRuntime();
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89
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90 ResolvedJavaMethod makeGraphMethod = null;
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91 ResolvedJavaMethod initMethod = null;
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92 try {
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93 Class<?> rjm = ResolvedJavaMethod.class;
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94 makeGraphMethod = runtime.lookupJavaMethod(ReplacementsImpl.class.getDeclaredMethod("makeGraph", rjm, rjm, SnippetInliningPolicy.class));
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95 initMethod = runtime.lookupJavaMethod(SnippetTemplate.AbstractTemplates.class.getDeclaredMethod("template", Arguments.class));
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96 } catch (NoSuchMethodException | SecurityException e) {
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97 throw new GraalInternalError(e);
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98 }
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99 StackTraceElement makeGraphSTE = makeGraphMethod.asStackTraceElement(1);
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100 StackTraceElement initSTE = initMethod.asStackTraceElement(30);
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101
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102 for (StackTraceElement element : new Exception().getStackTrace()) {
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103 if (makeGraphSTE.equals(element) || initSTE.equals(element)) {
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104 return true;
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105 }
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106 }
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107 return false;
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108 }
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109
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110 private static final Set<ResolvedJavaField> notEmbeddable = new HashSet<>();
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111
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112 private static void addResolvedToSet(Field field) {
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113 HotSpotRuntime runtime = graalRuntime().getRuntime();
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114 notEmbeddable.add(runtime.lookupJavaField(field));
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115 }
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116
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117 static {
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118 try {
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119 addResolvedToSet(Boolean.class.getDeclaredField("TRUE"));
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120 addResolvedToSet(Boolean.class.getDeclaredField("FALSE"));
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121
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diff changeset
122 Class<?> integerCacheClass = Integer.class.getDeclaredClasses()[0];
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diff changeset
123 assert "java.lang.Integer$IntegerCache".equals(integerCacheClass.getName());
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124 addResolvedToSet(integerCacheClass.getDeclaredField("cache"));
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125
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126 Class<?> longCacheClass = Long.class.getDeclaredClasses()[0];
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127 assert "java.lang.Long$LongCache".equals(longCacheClass.getName());
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128 addResolvedToSet(longCacheClass.getDeclaredField("cache"));
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129
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diff changeset
130 addResolvedToSet(Throwable.class.getDeclaredField("UNASSIGNED_STACK"));
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131 addResolvedToSet(Throwable.class.getDeclaredField("SUPPRESSED_SENTINEL"));
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132 } catch (SecurityException | NoSuchFieldException e) {
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133 throw new GraalInternalError(e);
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134 }
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135 }
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136
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137 /**
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138 * in AOT mode, some fields should never be embedded even for snippets/replacements.
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139 */
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140 private boolean isEmbeddable() {
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141 if (AOTCompilation.getValue() && notEmbeddable.contains(this)) {
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142 return false;
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143 }
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144 return true;
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145 }
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146
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147 private static final String SystemClassName = MetaUtil.toInternalName(System.class.getName());
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148
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149 @Override
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150 public Constant readConstantValue(Constant receiver) {
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diff changeset
151 assert !AOTCompilation.getValue() || isCalledForSnippets();
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152
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153 if (receiver == null) {
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154 assert Modifier.isStatic(flags);
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155 if (constant == null) {
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diff changeset
156 if (holder.isInitialized() && !holder.getName().equals(SystemClassName) && isEmbeddable()) {
9864
063a712fe8d8 converted remaining options in GraalOptions to new system (GRAAL-27)
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parents: 9792
diff changeset
157 if (Modifier.isFinal(getModifiers())) {
6539
2463eb24b644 Cleanup of Graal API: Rename methods so that it follows the getXxx naming convention and so that they are similar to the names of the java.lang.reflect classes. Remove unused methods.
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diff changeset
158 constant = readValue(receiver);
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159 }
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160 }
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161 }
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162 return constant;
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163 } else {
7689
ed51e7237e94 extracted TODOs as issues
Christian Haeubl <haeubl@ssw.jku.at>
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164 /*
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165 * for non-static final fields, we must assume that they are only initialized if they
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166 * have a non-default value.
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167 */
6950
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diff changeset
168 assert !Modifier.isStatic(flags);
9912
fbad7372eccd added support for stable options
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diff changeset
169 Object object = receiver.asObject();
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diff changeset
170 if (Modifier.isFinal(getModifiers())) {
7689
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diff changeset
171 Constant value = readValue(receiver);
9912
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172 if (assumeNonStaticFinalFieldsAsFinal(object.getClass()) || !value.isDefaultForKind()) {
7689
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173 return value;
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parents: 7530
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174 }
9912
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diff changeset
175 } else {
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176 Class<?> clazz = object.getClass();
9914
84890660eefb cleaner implementation of stable options
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diff changeset
177 if (StableOptionValue.class.isAssignableFrom(clazz)) {
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178 StableOptionValue<?> option = (StableOptionValue<?>) object;
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179 return Constant.forObject(option.getValue());
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180 }
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181 }
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182 }
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183 return null;
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184 }
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185
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186 @Override
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187 public Constant readValue(Constant receiver) {
5629
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188 if (receiver == null) {
6950
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diff changeset
189 assert Modifier.isStatic(flags);
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diff changeset
190 if (holder.isInitialized()) {
9289
261a43921c5e rename: HotSpotGraalRuntime.getInstance() -> graalRuntime()
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diff changeset
191 return graalRuntime().getRuntime().readUnsafeConstant(getKind(), holder.mirror(), offset);
5629
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192 }
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diff changeset
193 return null;
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diff changeset
194 } else {
6950
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diff changeset
195 assert !Modifier.isStatic(flags);
9289
261a43921c5e rename: HotSpotGraalRuntime.getInstance() -> graalRuntime()
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diff changeset
196 return graalRuntime().getRuntime().readUnsafeConstant(getKind(), receiver.asObject(), offset);
5629
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diff changeset
197 }
26a060cc58ca Initial implementation of closed world analysis by iteratively expanding the universe starting at method entry points.
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diff changeset
198 }
26a060cc58ca Initial implementation of closed world analysis by iteratively expanding the universe starting at method entry points.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff changeset
199
7691
014092acf009 fixed bootstrap performance issue that occurred because non-static final fields are no longer assumed constant
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diff changeset
200 private static boolean assumeNonStaticFinalFieldsAsFinal(Class<?> clazz) {
014092acf009 fixed bootstrap performance issue that occurred because non-static final fields are no longer assumed constant
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parents: 7689
diff changeset
201 return clazz == SnippetCounter.class;
014092acf009 fixed bootstrap performance issue that occurred because non-static final fields are no longer assumed constant
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diff changeset
202 }
014092acf009 fixed bootstrap performance issue that occurred because non-static final fields are no longer assumed constant
Christian Haeubl <haeubl@ssw.jku.at>
parents: 7689
diff changeset
203
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parents:
diff changeset
204 @Override
7104
5c25483b5515 Remove the ResolvedJavaType.Representation for static fields. It is not necessary to emit the constant holder for static fields in the GraphBuilder. Only the VM-specific lowering needs to create the constants, and it can access the VM-specific metadata objects directly.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 7099
diff changeset
205 public HotSpotResolvedObjectType getDeclaringClass() {
3733
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parents:
diff changeset
206 return holder;
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diff changeset
207 }
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parents:
diff changeset
208
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parents:
diff changeset
209 @Override
6539
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Christian Wimmer <christian.wimmer@oracle.com>
parents: 6525
diff changeset
210 public Kind getKind() {
2463eb24b644 Cleanup of Graal API: Rename methods so that it follows the getXxx naming convention and so that they are similar to the names of the java.lang.reflect classes. Remove unused methods.
Christian Wimmer <christian.wimmer@oracle.com>
parents: 6525
diff changeset
211 return getType().getKind();
3733
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parents:
diff changeset
212 }
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diff changeset
213
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parents:
diff changeset
214 @Override
6539
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parents: 6525
diff changeset
215 public String getName() {
3733
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parents:
diff changeset
216 return name;
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parents:
diff changeset
217 }
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parents:
diff changeset
218
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parents:
diff changeset
219 @Override
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diff changeset
220 public JavaType getType() {
3733
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parents:
diff changeset
221 return type;
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parents:
diff changeset
222 }
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parents:
diff changeset
223
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parents:
diff changeset
224 public int offset() {
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parents:
diff changeset
225 return offset;
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diff changeset
226 }
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parents:
diff changeset
227
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parents:
diff changeset
228 @Override
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parents:
diff changeset
229 public String toString() {
8949
da5140eedfa1 made format of toString() consistent across HotSpot subclasses of JavaField and JavaMethod
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parents: 8415
diff changeset
230 return format("HotSpotField<%H.%n %t:", this) + offset + ">";
3733
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parents:
diff changeset
231 }
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parents:
diff changeset
232
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parents:
diff changeset
233 @Override
9984
f3330a4487eb added ResolvedJava[Field|Method].isSynthetic()
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parents: 9914
diff changeset
234 public boolean isSynthetic() {
f3330a4487eb added ResolvedJava[Field|Method].isSynthetic()
Doug Simon <doug.simon@oracle.com>
parents: 9914
diff changeset
235 Field javaField = toJava();
f3330a4487eb added ResolvedJava[Field|Method].isSynthetic()
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parents: 9914
diff changeset
236 if (javaField != null) {
f3330a4487eb added ResolvedJava[Field|Method].isSynthetic()
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parents: 9914
diff changeset
237 return javaField.isSynthetic();
f3330a4487eb added ResolvedJava[Field|Method].isSynthetic()
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parents: 9914
diff changeset
238 }
f3330a4487eb added ResolvedJava[Field|Method].isSynthetic()
Doug Simon <doug.simon@oracle.com>
parents: 9914
diff changeset
239 return false;
f3330a4487eb added ResolvedJava[Field|Method].isSynthetic()
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parents: 9914
diff changeset
240 }
f3330a4487eb added ResolvedJava[Field|Method].isSynthetic()
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parents: 9914
diff changeset
241
f3330a4487eb added ResolvedJava[Field|Method].isSynthetic()
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parents: 9914
diff changeset
242 @Override
3733
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diff changeset
243 public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
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parents:
diff changeset
244 Field javaField = toJava();
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parents:
diff changeset
245 if (javaField != null) {
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diff changeset
246 return javaField.getAnnotation(annotationClass);
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parents:
diff changeset
247 }
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parents:
diff changeset
248 return null;
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249 }
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250
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251 private Field toJava() {
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252 try {
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253 return holder.mirror().getDeclaredField(name);
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254 } catch (NoSuchFieldException e) {
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255 return null;
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256 }
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257 }
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258 }