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annotate c1x4hotspotsrc/HotSpotVM/src/com/sun/hotspot/c1x/HotSpotTypeUnresolved.java @ 1941:79d04223b8a5

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Added caching for resolved types and resolved fields. This is crucial, because the local load elimination will lead to wrong results, if field equality (of two RiField objects with the same object and the same RiType) is not given. The caching makes sure that the default equals implementation is sufficient.
author Thomas Wuerthinger <wuerthinger@ssw.jku.at>
date Tue, 28 Dec 2010 18:33:26 +0100
parents 2fe369533fed
children 177398c6147d
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1 /*
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2 * Copyright (c) 2010 Sun Microsystems, Inc. All rights reserved.
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3 *
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4 * Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product
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5 * that is described in this document. In particular, and without limitation, these intellectual property
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6 * rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or
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7 * more additional patents or pending patent applications in the U.S. and in other countries.
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8 *
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9 * U.S. Government Rights - Commercial software. Government users are subject to the Sun
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10 * Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its
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11 * supplements.
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12 *
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13 * Use is subject to license terms. Sun, Sun Microsystems, the Sun logo, Java and Solaris are trademarks or
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14 * registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. All SPARC trademarks
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15 * are used under license and are trademarks or registered trademarks of SPARC International, Inc. in the
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16 * U.S. and other countries.
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17 *
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18 * UNIX is a registered trademark in the U.S. and other countries, exclusively licensed through X/Open
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19 * Company, Ltd.
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20 */
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21 package com.sun.hotspot.c1x;
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22
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23 import com.sun.cri.ci.*;
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24 import com.sun.cri.ri.*;
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25
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26 /**
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27 * Implementation of RiType for unresolved HotSpot classes.
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28 *
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29 * @author Thomas Wuerthinger, Lukas Stadler
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30 */
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31 public class HotSpotTypeUnresolved implements HotSpotType {
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32
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33 public final String name;
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34 public final int dimensions;
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35
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36 /**
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37 * Creates a new unresolved type for a specified type descriptor.
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38 */
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39 public HotSpotTypeUnresolved(String name) {
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40 assert name.length() > 0 : "name cannot be empty";
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41
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42 int dimensions = 0;
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43 // Decode name if necessary.
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44 if (name.charAt(name.length() - 1) == ';') {
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45 int startIndex = 0;
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46 while (name.charAt(startIndex) == '[') {
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47 startIndex++;
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48 dimensions++;
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49 }
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50 assert name.charAt(startIndex) == 'L';
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51 name = name.substring(startIndex + 1, name.length() - 1);
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52 }
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53
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54 this.name = name;
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55 this.dimensions = dimensions;
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56 }
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57
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58 public HotSpotTypeUnresolved(String name, int dimensions) {
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59 assert dimensions >= 0;
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60 this.name = name;
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61 this.dimensions = dimensions;
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62 }
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63
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64 @Override
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65 public String name() {
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66 StringBuilder str = new StringBuilder();
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67 for (int i = 0; i < dimensions; i++) {
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68 str.append('[');
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69 }
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70 str.append('L').append(name).append(';');
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71 return str.toString();
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72 }
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73
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74 @Override
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75 public String simpleName() {
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76 return name;
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77 }
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78
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79 @Override
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80 public Class<?> javaClass() {
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81 throw unresolved("javaClass");
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82 }
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83
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84 @Override
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85 public boolean hasSubclass() {
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86 throw unresolved("hasSubclass()");
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87 }
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88
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89 @Override
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90 public boolean hasFinalizer() {
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91 throw unresolved("hasFinalizer()");
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92 }
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93
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94 @Override
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95 public boolean hasFinalizableSubclass() {
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96 throw unresolved("hasFinalizableSubclass()");
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97 }
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98
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99 @Override
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100 public boolean isInterface() {
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101 throw unresolved("isInterface()");
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102 }
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103
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104 @Override
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105 public boolean isArrayClass() {
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106 return dimensions > 0;
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107 }
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108
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109 @Override
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110 public boolean isInstanceClass() {
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111 throw unresolved("isInstanceClass()");
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112 }
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113
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114 @Override
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115 public int accessFlags() {
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116 throw unresolved("accessFlags()");
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117 }
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118
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119 @Override
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120 public boolean isResolved() {
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121 return false;
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122 }
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123
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124 @Override
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125 public boolean isInitialized() {
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126 throw unresolved("isInitialized()");
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127 }
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128
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129 @Override
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130 public boolean isSubtypeOf(RiType other) {
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131 throw unresolved("isSubtypeOf()");
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132 }
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133
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134 @Override
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135 public boolean isInstance(Object obj) {
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136 throw unresolved("isInstance()");
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137 }
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138
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139 @Override
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140 public RiType componentType() {
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141 assert isArrayClass() : "no array class" + name();
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142 return new HotSpotTypeUnresolved(name, dimensions - 1);
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143 }
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144
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145 @Override
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146 public RiType exactType() {
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147 throw unresolved("exactType()");
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148 }
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149
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150 @Override
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151 public RiType arrayOf() {
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152 return new HotSpotTypeUnresolved(name, dimensions + 1);
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153 }
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154
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155 @Override
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156 public RiMethod resolveMethodImpl(RiMethod method) {
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157 throw unresolved("resolveMethodImpl()");
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158 }
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159
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160 @Override
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161 public CiKind kind() {
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162 return CiKind.Object;
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163 }
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164
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165 private CiUnresolvedException unresolved(String operation) {
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166 throw new CiUnresolvedException(operation + " not defined for unresolved class " + name);
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167 }
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168
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169 @Override
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170 public int hashCode() {
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171 return name.hashCode();
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172 }
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173
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174 @Override
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175 public boolean equals(Object o) {
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176 return o == this;
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177 }
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178
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179 @Override
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180 public String toString() {
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181 return "HotSpotType<" + name + ", unresolved>";
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182 }
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183
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184 @Override
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185 public CiConstant getEncoding(RiType.Representation r) {
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186 throw unresolved("getEncoding()");
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187 }
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188
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189 @Override
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190 public CiKind getRepresentationKind(RiType.Representation r) {
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191 return CiKind.Object;
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192 }
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193
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194 }