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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/ExecutionContext.java @ 16391:50d79ad439f1

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Truffle/Instrumentation: rename PhylumTag to SyntaxTag (along with related classes/methods)
author Michael Van De Vanter <michael.van.de.vanter@oracle.com>
date Wed, 02 Jul 2014 16:06:42 -0700
parents da146f137cf7
children 7833417c8172
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1 /*
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2 * Copyright (c) 2013, 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. 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;
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26
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27 import java.util.*;
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28
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29 import com.oracle.truffle.api.instrument.*;
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30 import com.oracle.truffle.api.instrument.impl.*;
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31 import com.oracle.truffle.api.source.*;
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32
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33 /**
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34 * Access to information and basic services in the runtime context for a Truffle-implemented guest
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35 * language.
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36 * <p>
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37 * <strong>Disclaimer:</strong> this class is under development and will change.
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38 */
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39 public abstract class ExecutionContext {
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40
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41 private final ProbeManager probeManager = new ProbeManager();
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42 private final List<SourceListener> sourceListeners = new ArrayList<>();
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43 private Visualizer visualizer = new DefaultVisualizer();
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44
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45 protected ExecutionContext() {
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46 }
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47
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48 public void initialize() {
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49 setSourceCallback(new SourceCallback() {
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50
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51 public void startLoading(Source source) {
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52 for (SourceListener listener : sourceListeners) {
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53 listener.loadStarting(source);
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54 }
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55 }
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56
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57 public void endLoading(Source source) {
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58 for (SourceListener listener : sourceListeners) {
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59 listener.loadEnding(source);
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60 }
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61 }
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62 });
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63 }
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64
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65 /**
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66 * Registers a tool interested in being notified about the loading of {@link Source}s.
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67 */
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68 public final void addSourceListener(SourceListener listener) {
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69 assert listener != null;
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70 sourceListeners.add(listener);
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71 }
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72
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73 /**
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74 * Unregisters a tool interested in being notified about the loading of {@link Source}s.
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75 */
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76 public final void removeSourceListener(SourceListener removeListener) {
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77 final List<SourceListener> listeners = new ArrayList<>(sourceListeners);
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78 for (SourceListener listener : listeners) {
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79 if (listener == removeListener) {
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80 sourceListeners.remove(listener);
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81 }
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82 }
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83 }
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84
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85 /**
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86 * Registers a tool interested in being notified about the insertion of a newly created
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87 * {@link Probe} into a Truffle AST.
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88 */
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89 public final void addProbeListener(ProbeListener listener) {
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90 probeManager.addProbeListener(listener);
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91 }
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92
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93 /**
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94 * Unregisters a tool interested in being notified about the insertion of a newly created
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95 * {@link Probe} into a Truffle AST.
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96 */
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97 public final void removeProbeListener(ProbeListener listener) {
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98 probeManager.removeProbeListener(listener);
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99 }
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100
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101 /**
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102 * Return the (possibly newly created) {@link Probe} uniquely associated with a particular
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103 * source code location. A newly created probe carries no tags.
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104 *
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105 * @return a probe uniquely associated with an extent of guest language source code.
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106 */
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107 public final Probe getProbe(SourceSection sourceSection) {
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108 return probeManager.getProbe(sourceSection);
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109 }
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110
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111 /**
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112 * Has a {@link Probe} been created that is uniquely associated with a particular source code
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113 * location.
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114 *
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115 * @return a probe uniquely associated with an extent of guest language source code.
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116 */
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117 public final boolean hasProbe(SourceSection sourceSection) {
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118 return probeManager.hasProbe(sourceSection);
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119 }
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120
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121 /**
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122 * Returns all existing probes with specific tag, or all probes if {@code tag = null}; empty
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123 * collection if no probes found.
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124 */
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125 public final Collection<Probe> findProbesTaggedAs(SyntaxTag tag) {
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126 return probeManager.findProbesTaggedAs(tag);
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127 }
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128
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129 /**
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130 * Returns all existing probes with first character on a specified line; empty collection if no
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131 * probes found.
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132 */
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133 public final Collection<Probe> findProbesByLine(LineLocation lineLocation) {
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134 return probeManager.findProbesByLine(lineLocation);
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135 }
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136
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137 /**
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138 * Sets a trap that will make a callback at any AST location where a existing probe holds a
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139 * specified tag; only one trap may be set at a time.
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140 *
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141 * @throws IllegalStateException if a trap is already set
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142 */
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143 public final void setTagTrap(SyntaxTagTrap trap) throws IllegalStateException {
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144 // TODO (mlvdv) consider allowing multiple traps (without inhibiting Truffle inlining)
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145 probeManager.setTagTrap(trap);
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146 }
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147
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148 /**
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149 * Clears a trap that will halt execution; only one trap may be set at a time.
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150 *
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151 * @throws IllegalStateException if no trap is set.
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152 */
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153 public final void clearTagTrap() {
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154 probeManager.clearTagTrap();
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155 }
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156
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157 /**
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158 * Access to information visualization services for the specific language.
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159 */
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160 public final Visualizer getVisualizer() {
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161 return visualizer;
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162 }
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163
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164 /**
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165 * Assign guest language-specific visualization support for tools. This must be assigned outside
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166 * the implementation context to avoid build circularities.
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167 */
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168 public final void setVisualizer(Visualizer visualizer) {
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169 this.visualizer = visualizer;
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170 }
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171
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172 /**
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173 * Gets the name of the language, possibly with version number. in short enough form that it
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174 * might be used for an interactive prompt.
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175 */
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176 public abstract String getLanguageShortName();
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177
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178 /**
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179 * Establishes source event reporting
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180 */
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181 protected abstract void setSourceCallback(SourceCallback sourceCallback);
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182
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183 }