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annotate truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/Accessor.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents c334865b9d42
children 67f75f61c974 dcb70d90c11d 1c0f490984d5
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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 com.oracle.truffle.api.Assumption;
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28 import com.oracle.truffle.api.CallTarget;
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29 import com.oracle.truffle.api.Truffle;
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30 import com.oracle.truffle.api.TruffleLanguage;
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31 import com.oracle.truffle.api.TruffleLanguage.Env;
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32 import com.oracle.truffle.api.debug.DebugSupportProvider;
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33 import com.oracle.truffle.api.debug.Debugger;
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34 import com.oracle.truffle.api.instrument.Probe;
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35 import com.oracle.truffle.api.instrument.ToolSupportProvider;
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36 import com.oracle.truffle.api.nodes.Node;
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37 import com.oracle.truffle.api.nodes.RootNode;
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38 import com.oracle.truffle.api.source.Source;
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39 import java.io.Closeable;
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40 import java.io.IOException;
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41 import java.io.Reader;
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42 import java.io.Writer;
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43 import java.lang.ref.Reference;
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44 import java.lang.ref.WeakReference;
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45
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46 /**
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47 * Communication between TruffleVM and TruffleLanguage API/SPI.
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48 */
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49 @SuppressWarnings("rawtypes")
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50 public abstract class Accessor {
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51 private static Accessor API;
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52 private static Accessor SPI;
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53 private static Accessor NODES;
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54 private static Accessor INSTRUMENT;
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55 private static Accessor DEBUG;
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56 private static final ThreadLocal<Object> CURRENT_VM = new ThreadLocal<>();
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57
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58 static {
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59 TruffleLanguage<?> lng = new TruffleLanguage<Object>() {
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60 @Override
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61 protected Object findExportedSymbol(Object context, String globalName, boolean onlyExplicit) {
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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 Object getLanguageGlobal(Object context) {
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67 return null;
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68 }
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69
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70 @Override
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71 protected boolean isObjectOfLanguage(Object object) {
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72 return false;
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73 }
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74
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75 @Override
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76 protected ToolSupportProvider getToolSupport() {
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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 DebugSupportProvider getDebugSupport() {
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82 return null;
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83 }
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84
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85 @Override
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86 protected CallTarget parse(Source code, Node context, String... argumentNames) throws IOException {
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87 throw new IOException();
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88 }
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89
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90 @Override
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91 protected Object createContext(TruffleLanguage.Env env) {
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92 return null;
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93 }
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94 };
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95 lng.hashCode();
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96 new Node(null) {
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97 }.getRootNode();
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98
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99 try {
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100 Class.forName(Debugger.class.getName(), true, Debugger.class.getClassLoader());
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101 } catch (ClassNotFoundException ex) {
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102 throw new IllegalStateException(ex);
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103 }
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104 }
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105
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106 protected Accessor() {
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107 if (this.getClass().getSimpleName().endsWith("API")) {
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108 if (API != null) {
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109 throw new IllegalStateException();
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110 }
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111 API = this;
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112 } else if (this.getClass().getSimpleName().endsWith("Nodes")) {
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113 if (NODES != null) {
5bc7f7b867ab Making debugger always on for each TruffleVM execution. Introducing EventConsumer to process such debugger events. Requesting each RootNode to be associated with a TruffleLanguage, so debugger can find out proper context for each Node where executions gets suspended.
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114 throw new IllegalStateException();
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115 }
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116 NODES = this;
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117 } else if (this.getClass().getSimpleName().endsWith("Instrument")) {
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118 if (INSTRUMENT != null) {
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119 throw new IllegalStateException();
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120 }
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121 INSTRUMENT = this;
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122 } else if (this.getClass().getSimpleName().endsWith("Debug")) {
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123 if (DEBUG != null) {
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124 throw new IllegalStateException();
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125 }
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126 DEBUG = this;
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127 } else {
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128 if (SPI != null) {
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129 throw new IllegalStateException();
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130 }
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131 SPI = this;
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132 }
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133 }
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134
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135 protected Env attachEnv(Object vm, TruffleLanguage<?> language, Writer stdOut, Writer stdErr, Reader stdIn) {
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136 return API.attachEnv(vm, language, stdOut, stdErr, stdIn);
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137 }
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138
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139 protected Object eval(TruffleLanguage<?> l, Source s) throws IOException {
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140 return API.eval(l, s);
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141 }
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142
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143 protected Object importSymbol(Object vm, TruffleLanguage<?> queryingLang, String globalName) {
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144 return SPI.importSymbol(vm, queryingLang, globalName);
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145 }
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146
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147 protected Object findExportedSymbol(TruffleLanguage.Env env, String globalName, boolean onlyExplicit) {
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148 return API.findExportedSymbol(env, globalName, onlyExplicit);
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149 }
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150
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151 protected Object languageGlobal(TruffleLanguage.Env env) {
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152 return API.languageGlobal(env);
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153 }
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154
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155 protected ToolSupportProvider getToolSupport(TruffleLanguage<?> l) {
21890
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156 return API.getToolSupport(l);
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157 }
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158
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159 protected DebugSupportProvider getDebugSupport(TruffleLanguage<?> l) {
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160 return API.getDebugSupport(l);
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161 }
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162
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163 protected Class<? extends TruffleLanguage> findLanguage(RootNode n) {
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164 return NODES.findLanguage(n);
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165 }
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166
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167 protected Class<? extends TruffleLanguage> findLanguage(Probe probe) {
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168 return INSTRUMENT.findLanguage(probe);
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169 }
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170
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171 protected Env findLanguage(Object known, Class<? extends TruffleLanguage> languageClass) {
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172 Object vm;
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173 if (known == null) {
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174 vm = CURRENT_VM.get();
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175 if (vm == null) {
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176 throw new IllegalStateException();
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177 }
22133
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diff changeset
178 if (languageClass == null) {
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diff changeset
179 return null;
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180 }
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181 } else {
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diff changeset
182 vm = known;
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183 }
22012
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diff changeset
184 return SPI.findLanguage(vm, languageClass);
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185 }
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186
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diff changeset
187 private static Reference<Object> previousVM = new WeakReference<>(null);
22068
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diff changeset
188 private static Assumption oneVM = Truffle.getRuntime().createAssumption();
22070
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diff changeset
189
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diff changeset
190 protected Closeable executionStart(Object vm, Debugger[] fillIn, Source s) {
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diff changeset
191 final Closeable debugClose = DEBUG.executionStart(vm, fillIn, s);
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diff changeset
192 final Object prev = CURRENT_VM.get();
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diff changeset
193 if (!(vm == previousVM.get())) {
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diff changeset
194 previousVM = new WeakReference<>(vm);
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diff changeset
195 oneVM.invalidate();
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diff changeset
196 oneVM = Truffle.getRuntime().createAssumption();
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diff changeset
197
22068
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diff changeset
198 }
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diff changeset
199 CURRENT_VM.set(vm);
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diff changeset
200 class ContextCloseable implements Closeable {
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diff changeset
201 @Override
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diff changeset
202 public void close() throws IOException {
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203 CURRENT_VM.set(prev);
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204 debugClose.close();
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205 }
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206 }
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207 return new ContextCloseable();
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208 }
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209
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210 protected void dispatchEvent(Object vm, Object event) {
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211 SPI.dispatchEvent(vm, event);
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212 }
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213
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214 static Assumption oneVMAssumption() {
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215 return oneVM;
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216 }
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217
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218 @SuppressWarnings({"unchecked", "rawtypes"})
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219 static <C> C findContext(Class<? extends TruffleLanguage> type) {
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220 Env env = SPI.findLanguage(CURRENT_VM.get(), type);
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221 return (C) API.findContext(env);
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222 }
22003
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223
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224 /**
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225 * Don't call me. I am here only to let NetBeans debug any Truffle project.
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226 *
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227 * @param args
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228 */
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229 public static void main(String... args) {
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230 throw new IllegalStateException();
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231 }
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232
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233 protected Object findContext(Env env) {
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234 return API.findContext(env);
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235 }
22110
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236
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237 protected TruffleLanguage<?> findLanguage(Env env) {
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238 return API.findLanguage(env);
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239 }
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240 }