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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/ExecutionContext.java @ 15779:8c34e2cc4add

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Truffle/Instrumentation: significant reorganization of the instrumentation framework's implementation and connection to the runtime ExecutionContext, with some new features, including a Tag-based "trap" mechanisms.
author Michael Van De Vanter <michael.van.de.vanter@oracle.com>
date Mon, 19 May 2014 17:14:36 -0700
parents bb9473723904
children eb947cc7bff9
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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 SourceManager sourceManager = new SourceManager();
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43 private final List<SourceListener> sourceListeners = new ArrayList<>();
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44 private Visualizer visualizer = new DefaultVisualizer();
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45
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46 protected ExecutionContext() {
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47 }
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48
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49 public void initialize() {
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50 setSourceCallback(new SourceCallback() {
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51
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52 public void startLoading(Source source) {
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53 for (SourceListener listener : sourceListeners) {
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54 listener.loadStarting(source);
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55 }
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56 }
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57
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58 public void endLoading(Source source) {
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59 for (SourceListener listener : sourceListeners) {
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60 listener.loadEnding(source);
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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 /**
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67 * Gets access to source management services.
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68 */
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69 public final SourceManager getSourceManager() {
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70 return sourceManager;
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71 }
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72
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73 /**
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74 * Registers 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 addSourceListener(SourceListener listener) {
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77 assert listener != null;
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78 sourceListeners.add(listener);
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79 }
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80
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81 /**
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82 * Registers a tool interested in being notified about the insertion of a newly created
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83 * {@link Probe} into a Truffle AST.
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84 */
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85 public final void addProbeListener(ProbeListener listener) {
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86 probeManager.addProbeListener(listener);
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87 }
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88
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89 /**
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90 * Return the (possibly newly created) {@link Probe} uniquely associated with a particular
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91 * source code location. A newly created probe carries no tags.
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92 *
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93 * @return a probe uniquely associated with an extent of guest language source code.
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94 */
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95 public final Probe getProbe(SourceSection sourceSection) {
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96 return probeManager.getProbe(sourceSection);
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97 }
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98
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99 /**
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100 * Returns all existing probes with specific tag, or all probes if {@code tag = null}; empty
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101 * collection if no probes found.
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102 */
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103 public final Collection<Probe> findProbesTaggedAs(PhylumTag tag) {
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104 return probeManager.findProbesTaggedAs(tag);
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105 }
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106
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107 /**
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108 * Returns all existing probes with first character on a specified line; empty collection if no
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109 * probes found.
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110 */
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111 public final Collection<Probe> findProbesByLine(SourceLineLocation lineLocation) {
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112 return probeManager.findProbesByLine(lineLocation);
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113 }
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114
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115 /**
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116 * Sets a trap that will make a callback at any AST location where a existing probe holds a
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117 * specified tag; only one trap may be set at a time.
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118 *
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119 * @throws IllegalStateException if a trap is already set
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120 */
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121 public final void setPhylumTrap(PhylumTrap trap) throws IllegalStateException {
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122 // TODO (mlvdv) consider allowing multiple traps (without inhibiting Truffle inlining)
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123 probeManager.setPhylumTrap(trap);
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124 }
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125
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126 /**
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127 * Clears a trap that will halt execution; only one trap may be set at a time.
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128 *
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129 * @throws IllegalStateException if no trap is set.
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130 */
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131 public final void clearPhylumTrap() {
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132 probeManager.clearPhylumTrap();
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133 }
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134
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135 /**
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136 * Access to information visualization services for the specific language.
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137 */
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138 public final Visualizer getVisualizer() {
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139 return visualizer;
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140 }
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141
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142 /**
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143 * Assign guest language-specific visualization support for tools. This must be assigned outside
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144 * the implementation context to avoid build circularities.
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145 */
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146 public final void setVisualizer(Visualizer visualizer) {
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147 this.visualizer = visualizer;
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148 }
13455
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149
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150 /**
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151 * Gets the name of the language, possibly with version number. in short enough form that it
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152 * might be used for an interactive prompt.
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153 */
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154 public abstract String getLanguageShortName();
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155
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156 /**
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157 * Add instrumentation to subsequently constructed Truffle ASTs for the guest language; every
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158 * one added will have the opportunity to add instrumentation.
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159 *
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160 * @throws IllegalStateException if AST instrumentation not enabled
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161 * @throws IllegalArgumentException if prober not usable for the guest language implementation.
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162 */
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163 public abstract void addNodeProber(ASTNodeProber nodeProber) throws IllegalStateException, IllegalArgumentException;
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164
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165 /**
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166 * Assigns a guest language-specific manager for using {@link ASTNodeProber}s added by tools to
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167 * instrument ASTs with {@link Probe}s at specified nodes. This must be assigned outside the
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168 * implementation context to avoid build circularities. It must also be set before any
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169 * instrumentation probe implementations are assigned.
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170 */
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171 public abstract void setASTProber(ASTProber astProber);
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172
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173 /**
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174 * Establishes source event reporting
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175 */
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176 protected abstract void setSourceCallback(SourceCallback sourceCallback);
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177
13455
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178 }