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annotate truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/Accessor.java @ 22070:a7ca9e9a1d51

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Removing VirtualFrame parameter. Documenting.
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Thu, 06 Aug 2015 18:08:27 +0200
parents fec8f8a61f6c
children 77562c7bc5a6
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1 /*
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2 * Copyright (c) 2014, 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. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.impl;
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26
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27 import java.io.*;
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28 import java.util.*;
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29
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30 import com.oracle.truffle.api.*;
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31 import com.oracle.truffle.api.TruffleLanguage.Env;
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32 import com.oracle.truffle.api.debug.*;
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33 import com.oracle.truffle.api.instrument.*;
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34 import com.oracle.truffle.api.nodes.Node;
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35 import com.oracle.truffle.api.nodes.RootNode;
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36 import com.oracle.truffle.api.source.*;
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37 import com.oracle.truffle.api.vm.*;
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38 import java.lang.ref.Reference;
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39 import java.lang.ref.WeakReference;
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40
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41 /**
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42 * Communication between TruffleVM and TruffleLanguage API/SPI.
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43 */
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44 @SuppressWarnings("rawtypes")
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45 public abstract class Accessor {
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46 private static Accessor API;
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47 private static Accessor SPI;
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48 private static Accessor NODES;
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49 private static Accessor INSTRUMENT;
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50 private static Accessor DEBUG;
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51 private static final ThreadLocal<TruffleVM> CURRENT_VM = new ThreadLocal<>();
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52
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53 static {
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54 TruffleLanguage<?> lng = new TruffleLanguage<Object>() {
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55 @Override
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56 protected Object findExportedSymbol(Object context, String globalName, boolean onlyExplicit) {
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57 return null;
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58 }
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59
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60 @Override
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61 protected Object getLanguageGlobal(Object context) {
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62 return null;
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63 }
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64
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65 @Override
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66 protected boolean isObjectOfLanguage(Object object) {
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67 return false;
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68 }
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70 @Override
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71 protected ToolSupportProvider getToolSupport() {
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72 return null;
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73 }
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74
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75 @Override
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76 protected DebugSupportProvider getDebugSupport() {
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77 return null;
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78 }
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79
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80 @Override
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81 protected CallTarget parse(Source code, Node context, String... argumentNames) throws IOException {
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82 throw new IOException();
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83 }
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84
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85 @Override
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86 protected Object createContext(TruffleLanguage.Env env) {
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87 return null;
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88 }
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89 };
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90 lng.hashCode();
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91 new Node(null) {
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92 }.getRootNode();
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93
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94 try {
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95 Class.forName(Debugger.class.getName(), true, Debugger.class.getClassLoader());
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96 } catch (ClassNotFoundException ex) {
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97 throw new IllegalStateException(ex);
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98 }
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99 }
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100
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101 protected Accessor() {
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102 if (this.getClass().getSimpleName().endsWith("API")) {
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103 if (API != null) {
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104 throw new IllegalStateException();
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105 }
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106 API = this;
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107 } else if (this.getClass().getSimpleName().endsWith("Nodes")) {
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108 if (NODES != null) {
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109 throw new IllegalStateException();
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110 }
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111 NODES = this;
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112 } else if (this.getClass().getSimpleName().endsWith("Instrument")) {
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113 if (INSTRUMENT != null) {
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114 throw new IllegalStateException();
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115 }
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116 INSTRUMENT = this;
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117 } else if (this.getClass().getSimpleName().endsWith("Debug")) {
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118 if (DEBUG != null) {
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119 throw new IllegalStateException();
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120 }
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121 DEBUG = this;
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122 } else {
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123 if (SPI != null) {
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124 throw new IllegalStateException();
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125 }
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126 SPI = this;
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127 }
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128 }
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129
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130 protected Env attachEnv(TruffleVM vm, TruffleLanguage<?> language, Writer stdOut, Writer stdErr, Reader stdIn) {
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131 return API.attachEnv(vm, language, stdOut, stdErr, stdIn);
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132 }
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133
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134 protected Object eval(TruffleLanguage<?> l, Source s) throws IOException {
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135 return API.eval(l, s);
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136 }
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137
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138 protected Object importSymbol(TruffleVM vm, TruffleLanguage<?> queryingLang, String globalName) {
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139 return SPI.importSymbol(vm, queryingLang, globalName);
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140 }
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141
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142 protected Object findExportedSymbol(TruffleLanguage.Env env, String globalName, boolean onlyExplicit) {
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143 return API.findExportedSymbol(env, globalName, onlyExplicit);
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144 }
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145
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146 protected Object languageGlobal(TruffleLanguage.Env env) {
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147 return API.languageGlobal(env);
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148 }
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149
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150 protected ToolSupportProvider getToolSupport(TruffleLanguage<?> l) {
21890
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151 return API.getToolSupport(l);
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152 }
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153
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154 protected DebugSupportProvider getDebugSupport(TruffleLanguage<?> l) {
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155 return API.getDebugSupport(l);
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156 }
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diff changeset
157
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158 protected Object invoke(TruffleLanguage<?> lang, Object obj, Object[] args) throws IOException {
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159 for (SymbolInvoker si : ServiceLoader.load(SymbolInvoker.class)) {
22003
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160 return si.invoke(lang, obj, args);
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161 }
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diff changeset
162 throw new IOException("No symbol invoker found!");
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163 }
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164
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165 protected Class<? extends TruffleLanguage> findLanguage(RootNode n) {
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166 return NODES.findLanguage(n);
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167 }
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168
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169 protected Class<? extends TruffleLanguage> findLanguage(Probe probe) {
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170 return INSTRUMENT.findLanguage(probe);
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171 }
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172
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173 protected Env findLanguage(TruffleVM known, Class<? extends TruffleLanguage> languageClass) {
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174 TruffleVM vm;
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diff changeset
175 if (known == null) {
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176 vm = CURRENT_VM.get();
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177 if (vm == null) {
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178 throw new IllegalStateException();
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179 }
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180 } else {
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181 vm = known;
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diff changeset
182 }
22012
09531c471176 Making sure the accessor can really find the TruffleLanguage instance by its class
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parents: 22003
diff changeset
183 return SPI.findLanguage(vm, languageClass);
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184 }
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diff changeset
185
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diff changeset
186 private static Reference<TruffleVM> previousVM = new WeakReference<>(null);
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diff changeset
187 private static Assumption oneVM = Truffle.getRuntime().createAssumption();
22070
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diff changeset
188
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diff changeset
189 protected Closeable executionStart(TruffleVM vm, Debugger[] fillIn, Source s) {
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diff changeset
190 final Closeable debugClose = DEBUG.executionStart(vm, fillIn, s);
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diff changeset
191 final TruffleVM prev = CURRENT_VM.get();
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diff changeset
192 if (!(vm == previousVM.get())) {
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diff changeset
193 previousVM = new WeakReference<>(vm);
fec8f8a61f6c Introducing FindContextNode
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diff changeset
194 oneVM.invalidate();
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diff changeset
195 oneVM = Truffle.getRuntime().createAssumption();
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diff changeset
196
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197 }
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198 CURRENT_VM.set(vm);
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199 class ContextCloseable implements Closeable {
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200 @Override
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201 public void close() throws IOException {
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202 CURRENT_VM.set(prev);
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203 debugClose.close();
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204 }
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205 }
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206 return new ContextCloseable();
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207 }
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208
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209 protected void dispatchEvent(TruffleVM vm, Object event) {
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210 SPI.dispatchEvent(vm, event);
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211 }
22070
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212
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213 static Assumption oneVMAssumption() {
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214 return oneVM;
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215 }
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216
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217 @SuppressWarnings({"unchecked", "rawtypes"})
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218 static <C> C findContext(Class<? extends TruffleLanguage> type) {
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219 Env env = SPI.findLanguage(CURRENT_VM.get(), type);
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220 return (C) API.findContext(env);
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221 }
22003
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222
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223 /**
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224 * Don't call me. I am here only to let NetBeans debug any Truffle project.
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225 *
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226 * @param args
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227 */
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228 public static void main(String... args) {
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229 throw new IllegalStateException();
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230 }
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231
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232 protected Object findContext(Env env) {
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233 return API.findContext(env);
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234 }
21468
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235 }