Mercurial > hg > truffle
annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/jvmci/HotSpotMethodHandleAccessProvider.java @ 21542:543957c1c6a6
removed more dependencies from JVMCI classes to non-JVMCI classes (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 25 May 2015 22:30:44 +0200 |
parents | c1e2fdb5fea3 |
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1 /* |
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2 * Copyright (c) 2014, 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.graal.hotspot.jvmci; |
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24 |
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25 import static com.oracle.graal.hotspot.jvmci.HotSpotJVMCIRuntime.*; |
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26 import static com.oracle.graal.hotspot.jvmci.HotSpotResolvedJavaType.*; |
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27 import static com.oracle.graal.hotspot.jvmci.HotSpotResolvedObjectTypeImpl.*; |
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28 |
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29 import com.oracle.graal.api.meta.*; |
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30 |
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31 public class HotSpotMethodHandleAccessProvider implements MethodHandleAccessProvider, HotSpotProxified { |
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32 |
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33 private final ConstantReflectionProvider constantReflection; |
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34 |
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35 public HotSpotMethodHandleAccessProvider(ConstantReflectionProvider constantReflection) { |
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36 this.constantReflection = constantReflection; |
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37 } |
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38 |
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39 /** |
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40 * Lazy initialization to break class initialization cycle. Field and method lookup is only |
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41 * possible after the {@link HotSpotJVMCIRuntime} is fully initialized. |
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42 */ |
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43 static class LazyInitialization { |
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44 static final ResolvedJavaField methodHandleFormField; |
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45 static final ResolvedJavaField lambdaFormVmentryField; |
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46 static final ResolvedJavaMethod lambdaFormCompileToBytecodeMethod; |
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47 static final ResolvedJavaField memberNameVmtargetField; |
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48 |
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49 /** |
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50 * Search for an instance field with the given name in a class. |
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51 * |
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52 * @param className name of the class to search in |
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53 * @param fieldName name of the field to be searched |
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54 * @return resolved java field |
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55 * @throws ClassNotFoundException |
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56 */ |
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57 private static ResolvedJavaField findFieldInClass(String className, String fieldName) throws ClassNotFoundException { |
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58 Class<?> clazz = Class.forName(className); |
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59 ResolvedJavaType type = fromClass(clazz); |
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60 ResolvedJavaField[] fields = type.getInstanceFields(false); |
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61 for (ResolvedJavaField field : fields) { |
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62 if (field.getName().equals(fieldName)) { |
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63 return field; |
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64 } |
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65 } |
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66 return null; |
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67 } |
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68 |
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69 private static ResolvedJavaMethod findMethodInClass(String className, String methodName) throws ClassNotFoundException { |
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70 Class<?> clazz = Class.forName(className); |
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71 HotSpotResolvedObjectTypeImpl type = fromObjectClass(clazz); |
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72 ResolvedJavaMethod result = null; |
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73 for (ResolvedJavaMethod method : type.getDeclaredMethods()) { |
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74 if (method.getName().equals(methodName)) { |
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75 assert result == null : "more than one method found: " + className + "." + methodName; |
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76 result = method; |
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77 } |
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78 } |
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79 assert result != null : "method not found: " + className + "." + methodName; |
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80 return result; |
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81 } |
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82 |
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83 static { |
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84 try { |
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85 methodHandleFormField = findFieldInClass("java.lang.invoke.MethodHandle", "form"); |
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86 lambdaFormVmentryField = findFieldInClass("java.lang.invoke.LambdaForm", "vmentry"); |
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87 lambdaFormCompileToBytecodeMethod = findMethodInClass("java.lang.invoke.LambdaForm", "compileToBytecode"); |
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88 memberNameVmtargetField = findFieldInClass("java.lang.invoke.MemberName", "vmtarget"); |
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89 } catch (Throwable ex) { |
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90 throw new InternalError(ex); |
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91 } |
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92 } |
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93 } |
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94 |
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95 @Override |
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96 public IntrinsicMethod lookupMethodHandleIntrinsic(ResolvedJavaMethod method) { |
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97 int intrinsicId = ((HotSpotResolvedJavaMethodImpl) method).intrinsicId(); |
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98 if (intrinsicId != 0) { |
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99 return getMethodHandleIntrinsic(intrinsicId); |
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100 } |
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101 return null; |
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102 } |
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103 |
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104 public static IntrinsicMethod getMethodHandleIntrinsic(int intrinsicId) { |
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105 HotSpotVMConfig config = runtime().getConfig(); |
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106 if (intrinsicId == config.vmIntrinsicInvokeBasic) { |
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107 return IntrinsicMethod.INVOKE_BASIC; |
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108 } else if (intrinsicId == config.vmIntrinsicLinkToInterface) { |
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109 return IntrinsicMethod.LINK_TO_INTERFACE; |
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110 } else if (intrinsicId == config.vmIntrinsicLinkToSpecial) { |
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111 return IntrinsicMethod.LINK_TO_SPECIAL; |
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112 } else if (intrinsicId == config.vmIntrinsicLinkToStatic) { |
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113 return IntrinsicMethod.LINK_TO_STATIC; |
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114 } else if (intrinsicId == config.vmIntrinsicLinkToVirtual) { |
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115 return IntrinsicMethod.LINK_TO_VIRTUAL; |
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116 } |
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117 return null; |
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118 } |
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119 |
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120 @Override |
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121 public ResolvedJavaMethod resolveInvokeBasicTarget(JavaConstant methodHandle, boolean forceBytecodeGeneration) { |
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122 if (methodHandle.isNull()) { |
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123 return null; |
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124 } |
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125 |
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126 /* Load non-public field: LambdaForm MethodHandle.form */ |
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127 JavaConstant lambdaForm = constantReflection.readFieldValue(LazyInitialization.methodHandleFormField, methodHandle); |
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128 if (lambdaForm.isNull()) { |
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129 return null; |
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130 } |
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131 |
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132 JavaConstant memberName; |
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133 if (forceBytecodeGeneration) { |
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134 /* Invoke non-public method: MemberName LambdaForm.compileToBytecode() */ |
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135 memberName = LazyInitialization.lambdaFormCompileToBytecodeMethod.invoke(lambdaForm, new JavaConstant[0]); |
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136 } else { |
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137 /* Load non-public field: MemberName LambdaForm.vmentry */ |
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138 memberName = constantReflection.readFieldValue(LazyInitialization.lambdaFormVmentryField, lambdaForm); |
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139 } |
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140 return getTargetMethod(memberName); |
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141 } |
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142 |
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143 @Override |
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144 public ResolvedJavaMethod resolveLinkToTarget(JavaConstant memberName) { |
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145 return getTargetMethod(memberName); |
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146 } |
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147 |
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148 /** |
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149 * Returns the {@link ResolvedJavaMethod} for the vmtarget of a java.lang.invoke.MemberName. |
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150 */ |
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151 private ResolvedJavaMethod getTargetMethod(JavaConstant memberName) { |
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152 if (memberName.isNull()) { |
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153 return null; |
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154 } |
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155 |
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156 /* Load injected field: JVM_Method* MemberName.vmtarget */ |
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157 JavaConstant vmtarget = constantReflection.readFieldValue(LazyInitialization.memberNameVmtargetField, memberName); |
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158 /* Create a method from the vmtarget method pointer. */ |
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159 return HotSpotResolvedJavaMethodImpl.fromMetaspace(vmtarget.asLong()); |
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160 } |
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161 } |