Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotSignature.java @ 22679:4688478ecb7b
Make space in frame for native callee to spill outgoing parameters
author | Stefan Anzinger <stefan.anzinger@oracle.com> |
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date | Tue, 13 Oct 2015 17:07:59 +0200 |
parents | 1bbd4a7c274b |
children | a920338dd4d4 |
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 java.util.ArrayList; |
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26 import java.util.List; |
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27 |
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28 import jdk.vm.ci.common.JVMCIError; |
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29 import jdk.vm.ci.meta.JavaKind; |
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30 import jdk.vm.ci.meta.JavaType; |
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31 import jdk.vm.ci.meta.ResolvedJavaType; |
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32 import jdk.vm.ci.meta.Signature; |
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33 |
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34 /** |
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35 * Represents a method signature. |
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36 */ |
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37 public class HotSpotSignature implements Signature { |
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38 |
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39 private final List<String> parameters = new ArrayList<>(); |
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40 private final String returnType; |
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41 private final String originalString; |
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42 private ResolvedJavaType[] parameterTypes; |
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43 private ResolvedJavaType returnTypeCache; |
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44 private final HotSpotJVMCIRuntimeProvider runtime; |
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45 |
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46 public HotSpotSignature(HotSpotJVMCIRuntimeProvider runtime, String signature) { |
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47 this.runtime = runtime; |
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48 assert signature.length() > 0; |
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49 this.originalString = signature; |
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50 |
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51 if (signature.charAt(0) == '(') { |
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52 int cur = 1; |
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53 while (cur < signature.length() && signature.charAt(cur) != ')') { |
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54 int nextCur = parseSignature(signature, cur); |
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55 parameters.add(signature.substring(cur, nextCur)); |
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56 cur = nextCur; |
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57 } |
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58 |
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59 cur++; |
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60 int nextCur = parseSignature(signature, cur); |
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61 returnType = signature.substring(cur, nextCur); |
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62 assert nextCur == signature.length(); |
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63 } else { |
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64 returnType = null; |
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65 } |
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66 } |
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67 |
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68 public HotSpotSignature(HotSpotJVMCIRuntimeProvider runtime, ResolvedJavaType returnType, ResolvedJavaType... parameterTypes) { |
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69 this.runtime = runtime; |
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70 this.parameterTypes = parameterTypes.clone(); |
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71 this.returnTypeCache = returnType; |
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72 this.returnType = returnType.getName(); |
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73 StringBuilder sb = new StringBuilder("("); |
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74 for (JavaType type : parameterTypes) { |
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75 parameters.add(type.getName()); |
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76 sb.append(type.getName()); |
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77 } |
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78 sb.append(")").append(returnType.getName()); |
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79 this.originalString = sb.toString(); |
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80 assert new HotSpotSignature(runtime, originalString).equals(this); |
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81 } |
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82 |
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83 private static int parseSignature(String signature, int start) { |
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84 int cur = start; |
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85 char first; |
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86 do { |
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87 first = signature.charAt(cur++); |
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88 } while (first == '['); |
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89 |
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90 switch (first) { |
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91 case 'L': |
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92 while (signature.charAt(cur) != ';') { |
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93 cur++; |
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94 } |
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95 cur++; |
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96 break; |
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97 case 'V': |
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98 case 'I': |
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99 case 'B': |
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100 case 'C': |
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101 case 'D': |
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102 case 'F': |
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103 case 'J': |
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104 case 'S': |
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105 case 'Z': |
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106 break; |
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107 default: |
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108 throw new JVMCIError("Invalid character at index %d in signature: %s", cur, signature); |
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109 } |
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110 return cur; |
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111 } |
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112 |
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113 @Override |
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114 public int getParameterCount(boolean withReceiver) { |
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115 return parameters.size() + (withReceiver ? 1 : 0); |
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116 } |
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117 |
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118 @Override |
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119 public JavaKind getParameterKind(int index) { |
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120 return JavaKind.fromTypeString(parameters.get(index)); |
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121 } |
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122 |
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123 private static boolean checkValidCache(ResolvedJavaType type, ResolvedJavaType accessingClass) { |
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124 assert accessingClass != null; |
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125 if (type == null) { |
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126 return false; |
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127 } else if (type instanceof HotSpotResolvedObjectTypeImpl) { |
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128 return ((HotSpotResolvedObjectTypeImpl) type).isDefinitelyResolvedWithRespectTo(accessingClass); |
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129 } |
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130 return true; |
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131 } |
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132 |
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133 private static JavaType getUnresolvedOrPrimitiveType(HotSpotJVMCIRuntimeProvider runtime, String name) { |
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134 if (name.length() == 1) { |
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135 JavaKind kind = JavaKind.fromPrimitiveOrVoidTypeChar(name.charAt(0)); |
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136 return runtime.getHostJVMCIBackend().getMetaAccess().lookupJavaType(kind.toJavaClass()); |
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137 } |
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138 return HotSpotUnresolvedJavaType.create(runtime, name); |
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139 } |
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140 |
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141 @Override |
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142 public JavaType getParameterType(int index, ResolvedJavaType accessingClass) { |
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143 if (accessingClass == null) { |
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144 // Caller doesn't care about resolution context so return an unresolved |
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145 // or primitive type (primitive type resolution is context free) |
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146 return getUnresolvedOrPrimitiveType(runtime, parameters.get(index)); |
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147 } |
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148 if (parameterTypes == null) { |
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149 parameterTypes = new ResolvedJavaType[parameters.size()]; |
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150 } |
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151 |
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152 ResolvedJavaType type = parameterTypes[index]; |
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153 if (!checkValidCache(type, accessingClass)) { |
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154 JavaType result = runtime.lookupType(parameters.get(index), (HotSpotResolvedObjectType) accessingClass, false); |
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155 if (result instanceof ResolvedJavaType) { |
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156 type = (ResolvedJavaType) result; |
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157 parameterTypes[index] = type; |
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158 } else { |
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159 return result; |
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160 } |
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161 } |
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162 return type; |
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163 } |
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164 |
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165 @Override |
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166 public String toMethodDescriptor() { |
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167 assert originalString.equals(Signature.super.toMethodDescriptor()); |
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168 return originalString; |
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169 } |
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170 |
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171 @Override |
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172 public JavaKind getReturnKind() { |
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173 return JavaKind.fromTypeString(returnType); |
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174 } |
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175 |
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176 @Override |
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177 public JavaType getReturnType(ResolvedJavaType accessingClass) { |
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178 if (accessingClass == null) { |
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179 // Caller doesn't care about resolution context so return an unresolved |
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180 // or primitive type (primitive type resolution is context free) |
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181 return getUnresolvedOrPrimitiveType(runtime, returnType); |
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182 } |
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183 if (!checkValidCache(returnTypeCache, accessingClass)) { |
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184 JavaType result = runtime.lookupType(returnType, (HotSpotResolvedObjectType) accessingClass, false); |
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185 if (result instanceof ResolvedJavaType) { |
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186 returnTypeCache = (ResolvedJavaType) result; |
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187 } else { |
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188 return result; |
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189 } |
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190 } |
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191 return returnTypeCache; |
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192 } |
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193 |
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194 @Override |
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195 public String toString() { |
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196 return "HotSpotSignature<" + originalString + ">"; |
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197 } |
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198 |
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199 @Override |
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200 public boolean equals(Object obj) { |
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201 if (obj instanceof HotSpotSignature) { |
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202 HotSpotSignature other = (HotSpotSignature) obj; |
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203 if (other.originalString.equals(originalString)) { |
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204 assert other.parameters.equals(parameters); |
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205 assert other.returnType.equals(returnType); |
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206 return true; |
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207 } |
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208 } |
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209 return false; |
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210 } |
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211 |
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212 @Override |
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213 public int hashCode() { |
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214 return originalString.hashCode(); |
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215 } |
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216 } |