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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotMethodHandleAccessProvider.java @ 18530:2906b3cc3e2f

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moved application of Remote marker interface to implementation classes only
author Doug Simon <doug.simon@oracle.com>
date Wed, 26 Nov 2014 13:20:14 +0100
parents f0a8b72315c1
children 7f4cb7587f4c
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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.meta;
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24
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25 import static com.oracle.graal.hotspot.HotSpotGraalRuntime.*;
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26 import static com.oracle.graal.hotspot.meta.HotSpotResolvedJavaType.*;
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27 import static com.oracle.graal.hotspot.meta.HotSpotResolvedObjectTypeImpl.*;
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28
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29 import com.oracle.graal.api.meta.*;
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30 import com.oracle.graal.compiler.common.*;
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31 import com.oracle.graal.hotspot.*;
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32
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33 public class HotSpotMethodHandleAccessProvider implements MethodHandleAccessProvider, Remote {
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34
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35 private final ConstantReflectionProvider constantReflection;
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36
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37 public HotSpotMethodHandleAccessProvider(ConstantReflectionProvider constantReflection) {
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38 this.constantReflection = constantReflection;
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39 }
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40
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41 /**
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42 * Lazy initialization to break class initialization cycle. Field and method lookup is only
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43 * possible after the {@link HotSpotGraalRuntime} is fully initialized.
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44 */
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45 static class LazyInitialization {
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46 static final ResolvedJavaField methodHandleFormField;
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47 static final ResolvedJavaField lambdaFormVmentryField;
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48 static final ResolvedJavaMethod lambdaFormCompileToBytecodeMethod;
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49 static final ResolvedJavaField memberNameVmtargetField;
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50
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51 /**
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52 * Search for an instance field with the given name in a class.
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53 *
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54 * @param className name of the class to search in
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55 * @param fieldName name of the field to be searched
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56 * @return resolved java field
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57 * @throws ClassNotFoundException
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58 */
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59 private static ResolvedJavaField findFieldInClass(String className, String fieldName) throws ClassNotFoundException {
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60 Class<?> clazz = Class.forName(className);
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61 ResolvedJavaType type = fromClass(clazz);
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62 ResolvedJavaField[] fields = type.getInstanceFields(false);
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63 for (ResolvedJavaField field : fields) {
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64 if (field.getName().equals(fieldName)) {
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65 return field;
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66 }
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67 }
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68 return null;
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69 }
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70
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71 private static ResolvedJavaMethod findMethodInClass(String className, String methodName) throws ClassNotFoundException {
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72 Class<?> clazz = Class.forName(className);
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73 HotSpotResolvedObjectTypeImpl type = fromObjectClass(clazz);
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74 ResolvedJavaMethod result = null;
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75 for (ResolvedJavaMethod method : type.getDeclaredMethods()) {
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76 if (method.getName().equals(methodName)) {
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77 assert result == null : "more than one method found: " + className + "." + methodName;
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78 result = method;
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79 }
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80 }
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81 assert result != null : "method not found: " + className + "." + methodName;
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82 return result;
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83 }
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84
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85 static {
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86 try {
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87 methodHandleFormField = findFieldInClass("java.lang.invoke.MethodHandle", "form");
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88 lambdaFormVmentryField = findFieldInClass("java.lang.invoke.LambdaForm", "vmentry");
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89 lambdaFormCompileToBytecodeMethod = findMethodInClass("java.lang.invoke.LambdaForm", "compileToBytecode");
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90 memberNameVmtargetField = findFieldInClass("java.lang.invoke.MemberName", "vmtarget");
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91 } catch (Throwable ex) {
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92 throw GraalInternalError.shouldNotReachHere();
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93 }
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94 }
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95 }
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96
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97 @Override
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98 public IntrinsicMethod lookupMethodHandleIntrinsic(ResolvedJavaMethod method) {
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99 int intrinsicId = ((HotSpotResolvedJavaMethodImpl) method).intrinsicId();
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100 if (intrinsicId != 0) {
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101 HotSpotVMConfig config = runtime().getConfig();
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102 if (intrinsicId == config.vmIntrinsicInvokeBasic) {
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103 return IntrinsicMethod.INVOKE_BASIC;
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104 } else if (intrinsicId == config.vmIntrinsicLinkToInterface) {
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105 return IntrinsicMethod.LINK_TO_INTERFACE;
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106 } else if (intrinsicId == config.vmIntrinsicLinkToSpecial) {
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107 return IntrinsicMethod.LINK_TO_SPECIAL;
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108 } else if (intrinsicId == config.vmIntrinsicLinkToStatic) {
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109 return IntrinsicMethod.LINK_TO_STATIC;
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110 } else if (intrinsicId == config.vmIntrinsicLinkToVirtual) {
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111 return IntrinsicMethod.LINK_TO_VIRTUAL;
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112 }
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113 }
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114 return null;
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115 }
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116
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117 @Override
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118 public ResolvedJavaMethod resolveInvokeBasicTarget(JavaConstant methodHandle, boolean forceBytecodeGeneration) {
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119 if (methodHandle.isNull()) {
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120 return null;
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121 }
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122
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123 /* Load non-public field: LambdaForm MethodHandle.form */
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124 JavaConstant lambdaForm = constantReflection.readFieldValue(LazyInitialization.methodHandleFormField, methodHandle);
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125 if (lambdaForm.isNull()) {
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126 return null;
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127 }
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128
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129 JavaConstant memberName;
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130 if (forceBytecodeGeneration) {
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131 /* Invoke non-public method: MemberName LambdaForm.compileToBytecode() */
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132 memberName = LazyInitialization.lambdaFormCompileToBytecodeMethod.invoke(lambdaForm, new JavaConstant[0]);
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133 } else {
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134 /* Load non-public field: MemberName LambdaForm.vmentry */
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135 memberName = constantReflection.readFieldValue(LazyInitialization.lambdaFormVmentryField, lambdaForm);
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136 }
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137 return getTargetMethod(memberName);
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138 }
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139
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140 @Override
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141 public ResolvedJavaMethod resolveLinkToTarget(JavaConstant memberName) {
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142 return getTargetMethod(memberName);
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143 }
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144
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145 /**
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146 * Returns the {@link ResolvedJavaMethod} for the vmtarget of a java.lang.invoke.MemberName.
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147 */
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148 private ResolvedJavaMethod getTargetMethod(JavaConstant memberName) {
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149 if (memberName.isNull()) {
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150 return null;
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151 }
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152
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153 /* Load injected field: JVM_Method* MemberName.vmtarget */
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154 JavaConstant vmtarget = constantReflection.readFieldValue(LazyInitialization.memberNameVmtargetField, memberName);
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155 /* Create a method from the vmtarget method pointer. */
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156 return HotSpotResolvedJavaMethodImpl.fromMetaspace(vmtarget.asLong());
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157 }
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158 }