Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotMethodHandleAccessProvider.java @ 22767:d88299d598d6
Add support for passing back bailout messages
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Tue, 12 Jan 2016 12:54:31 -0800 |
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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 jdk.vm.ci.hotspot; |
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24 |
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25 import static jdk.vm.ci.hotspot.CompilerToVM.compilerToVM; |
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26 import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.runtime; |
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27 import static jdk.vm.ci.hotspot.HotSpotResolvedObjectTypeImpl.fromObjectClass; |
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28 import jdk.vm.ci.common.JVMCIError; |
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29 import jdk.vm.ci.meta.ConstantReflectionProvider; |
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30 import jdk.vm.ci.meta.JavaConstant; |
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31 import jdk.vm.ci.meta.MethodHandleAccessProvider; |
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32 import jdk.vm.ci.meta.ResolvedJavaField; |
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33 import jdk.vm.ci.meta.ResolvedJavaMethod; |
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34 import jdk.vm.ci.meta.ResolvedJavaType; |
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35 |
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36 public class HotSpotMethodHandleAccessProvider implements MethodHandleAccessProvider, HotSpotProxified { |
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37 |
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38 private final ConstantReflectionProvider constantReflection; |
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39 |
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40 public HotSpotMethodHandleAccessProvider(ConstantReflectionProvider constantReflection) { |
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41 this.constantReflection = constantReflection; |
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42 } |
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43 |
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44 /** |
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45 * Lazy initialization to break class initialization cycle. Field and method lookup is only |
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46 * possible after the {@link HotSpotJVMCIRuntime} is fully initialized. |
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47 */ |
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48 static class LazyInitialization { |
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49 static final ResolvedJavaField methodHandleFormField; |
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50 static final ResolvedJavaField lambdaFormVmentryField; |
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51 static final ResolvedJavaMethod lambdaFormCompileToBytecodeMethod; |
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52 static final HotSpotResolvedJavaField memberNameVmtargetField; |
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53 |
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54 /** |
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55 * Search for an instance field with the given name in a class. |
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56 * |
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57 * @param className name of the class to search in |
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58 * @param fieldName name of the field to be searched |
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59 * @return resolved java field |
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60 * @throws ClassNotFoundException |
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61 */ |
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62 private static ResolvedJavaField findFieldInClass(String className, String fieldName) throws ClassNotFoundException { |
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63 Class<?> clazz = Class.forName(className); |
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64 ResolvedJavaType type = runtime().fromClass(clazz); |
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65 ResolvedJavaField[] fields = type.getInstanceFields(false); |
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66 for (ResolvedJavaField field : fields) { |
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67 if (field.getName().equals(fieldName)) { |
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68 return field; |
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69 } |
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70 } |
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71 return null; |
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72 } |
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73 |
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74 private static ResolvedJavaMethod findMethodInClass(String className, String methodName) throws ClassNotFoundException { |
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75 Class<?> clazz = Class.forName(className); |
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76 HotSpotResolvedObjectTypeImpl type = fromObjectClass(clazz); |
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77 ResolvedJavaMethod result = null; |
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78 for (ResolvedJavaMethod method : type.getDeclaredMethods()) { |
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79 if (method.getName().equals(methodName)) { |
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80 assert result == null : "more than one method found: " + className + "." + methodName; |
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81 result = method; |
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82 } |
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83 } |
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84 assert result != null : "method not found: " + className + "." + methodName; |
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85 return result; |
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86 } |
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87 |
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88 static { |
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89 try { |
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90 methodHandleFormField = findFieldInClass("java.lang.invoke.MethodHandle", "form"); |
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91 lambdaFormVmentryField = findFieldInClass("java.lang.invoke.LambdaForm", "vmentry"); |
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92 lambdaFormCompileToBytecodeMethod = findMethodInClass("java.lang.invoke.LambdaForm", "compileToBytecode"); |
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93 memberNameVmtargetField = (HotSpotResolvedJavaField) findFieldInClass("java.lang.invoke.MemberName", "vmtarget"); |
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94 } catch (Throwable ex) { |
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95 throw new JVMCIError(ex); |
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96 } |
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97 } |
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98 } |
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99 |
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100 @Override |
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101 public IntrinsicMethod lookupMethodHandleIntrinsic(ResolvedJavaMethod method) { |
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102 int intrinsicId = ((HotSpotResolvedJavaMethodImpl) method).intrinsicId(); |
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103 if (intrinsicId != 0) { |
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104 return getMethodHandleIntrinsic(intrinsicId); |
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105 } |
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106 return null; |
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107 } |
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108 |
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109 public static IntrinsicMethod getMethodHandleIntrinsic(int intrinsicId) { |
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110 HotSpotVMConfig config = runtime().getConfig(); |
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111 if (intrinsicId == config.vmIntrinsicInvokeBasic) { |
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112 return IntrinsicMethod.INVOKE_BASIC; |
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113 } else if (intrinsicId == config.vmIntrinsicLinkToInterface) { |
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114 return IntrinsicMethod.LINK_TO_INTERFACE; |
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115 } else if (intrinsicId == config.vmIntrinsicLinkToSpecial) { |
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116 return IntrinsicMethod.LINK_TO_SPECIAL; |
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117 } else if (intrinsicId == config.vmIntrinsicLinkToStatic) { |
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118 return IntrinsicMethod.LINK_TO_STATIC; |
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119 } else if (intrinsicId == config.vmIntrinsicLinkToVirtual) { |
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120 return IntrinsicMethod.LINK_TO_VIRTUAL; |
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121 } |
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122 return null; |
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123 } |
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124 |
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125 @Override |
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126 public ResolvedJavaMethod resolveInvokeBasicTarget(JavaConstant methodHandle, boolean forceBytecodeGeneration) { |
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127 if (methodHandle.isNull()) { |
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128 return null; |
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129 } |
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130 |
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131 /* Load non-public field: LambdaForm MethodHandle.form */ |
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132 JavaConstant lambdaForm = constantReflection.readFieldValue(LazyInitialization.methodHandleFormField, methodHandle); |
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133 if (lambdaForm.isNull()) { |
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134 return null; |
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135 } |
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136 |
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137 JavaConstant memberName; |
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138 if (forceBytecodeGeneration) { |
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139 /* Invoke non-public method: MemberName LambdaForm.compileToBytecode() */ |
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140 memberName = LazyInitialization.lambdaFormCompileToBytecodeMethod.invoke(lambdaForm, new JavaConstant[0]); |
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141 } else { |
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142 /* Load non-public field: MemberName LambdaForm.vmentry */ |
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143 memberName = constantReflection.readFieldValue(LazyInitialization.lambdaFormVmentryField, lambdaForm); |
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144 } |
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145 return getTargetMethod(memberName); |
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146 } |
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147 |
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148 @Override |
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149 public ResolvedJavaMethod resolveLinkToTarget(JavaConstant memberName) { |
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150 return getTargetMethod(memberName); |
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151 } |
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152 |
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153 /** |
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154 * Returns the {@link ResolvedJavaMethod} for the vmtarget of a java.lang.invoke.MemberName. |
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155 */ |
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156 private static ResolvedJavaMethod getTargetMethod(JavaConstant memberName) { |
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157 if (memberName.isNull()) { |
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158 return null; |
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159 } |
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160 |
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161 Object object = ((HotSpotObjectConstantImpl) memberName).object(); |
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162 /* Read the ResolvedJavaMethod from the injected field MemberName.vmtarget */ |
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163 return compilerToVM().getResolvedJavaMethod(object, LazyInitialization.memberNameVmtargetField.offset()); |
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164 } |
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165 } |