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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/ExecutionContext.java @ 18386:656331a61829

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Truffle: add support for setting a couple of compiler options for individual execution contexts.
author Chris Seaton <chris.seaton@oracle.com>
date Sun, 16 Nov 2014 15:44:38 -0800
parents c88ab4f1f04a
children e3c95cbbb50c
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69d2e4baa215 Truffle: new infrastructure related to instrumentation, and in particular debugging: support for managing Source objects; framework for generalized "instrumentation proxy nodes" (to be inserted into ASTs with no runtime cost when inactive), and "probes" (which can be attached to proxy nodes to receive event notification); a rudimentary interface and abstract implementation for a "debug manager" (mostly a placeholder at this point); and the beginning of a language-agnostic ExecutionContext interface.
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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.impl.*;
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30 import com.oracle.truffle.api.instrument.*;
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31 import com.oracle.truffle.api.instrument.impl.*;
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32 import com.oracle.truffle.api.source.*;
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33
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34 /**
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35 * Access to information and basic services in the runtime context for a Truffle-implemented guest
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36 * language.
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37 * <p>
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38 * <strong>Disclaimer:</strong> this class is under development and will change.
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39 */
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40 public abstract class ExecutionContext {
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41
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42 private final ProbeManager probeManager = new ProbeManager();
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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 /**
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50 * Sets up the {@link SourceCallback} for this execution context.
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51 */
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52 public void initialize() {
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53 setSourceCallback(new SourceCallback() {
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54
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55 public void startLoading(Source source) {
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56 for (SourceListener listener : sourceListeners) {
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57 listener.loadStarting(source);
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58 }
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59 }
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60
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61 public void endLoading(Source source) {
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62 for (SourceListener listener : sourceListeners) {
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63 listener.loadEnding(source);
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64 }
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65 }
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66 });
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67 }
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68
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69 /**
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70 * Registers a tool interested in being notified about the loading of {@link Source}s.
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71 */
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72 public final void addSourceListener(SourceListener listener) {
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73 assert listener != null;
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74 sourceListeners.add(listener);
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75 }
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76
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77 /**
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78 * Unregisters a tool interested in being notified about the loading of {@link Source}s.
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79 */
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80 public final void removeSourceListener(SourceListener removeListener) {
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81 final List<SourceListener> listeners = new ArrayList<>(sourceListeners);
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82 for (SourceListener listener : listeners) {
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83 if (listener == removeListener) {
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84 sourceListeners.remove(listener);
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85 }
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86 }
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87 }
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88
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89 /**
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90 * Registers a tool interested in being notified about the insertion of a newly created
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91 * {@link Probe} into a Truffle AST.
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92 */
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93 public final void addProbeListener(ProbeListener listener) {
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94 probeManager.addProbeListener(listener);
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95 }
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96
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97 /**
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98 * Unregisters a tool interested in being notified about the insertion of a newly created
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99 * {@link Probe} into a Truffle AST.
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100 */
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101 public final void removeProbeListener(ProbeListener listener) {
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102 probeManager.removeProbeListener(listener);
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103 }
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104
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105 /**
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106 * Return a newly created, untagged, {@link Probe} associated with a particular source section,
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107 * with no requirement that the association be unique.
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108 *
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109 * @return a probe associated with an extent of guest language source code.
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110 */
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111 public final Probe createProbe(SourceSection source) {
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112 return probeManager.createProbe(source);
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113 }
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114
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115 /**
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116 * Returns all existing probes with specific tag, or all probes if {@code tag = null}; empty
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117 * collection if no probes found.
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118 */
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119 public final Collection<Probe> findProbesTaggedAs(SyntaxTag tag) {
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120 return probeManager.findProbesTaggedAs(tag);
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121 }
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122
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123 /**
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124 * Sets a trap that will make a callback at any AST location where a existing probe holds a
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125 * specified tag; only one trap may be set at a time.
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126 *
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127 * @throws IllegalStateException if a trap is already set
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128 */
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129 public final void setTagTrap(SyntaxTagTrap trap) throws IllegalStateException {
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130 // TODO (mlvdv) consider allowing multiple traps (without inhibiting Truffle inlining)
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131 probeManager.setTagTrap(trap);
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132 }
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133
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134 /**
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135 * Clears a trap that will halt execution; only one trap may be set at a time.
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136 *
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137 * @throws IllegalStateException if no trap is set.
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138 */
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139 public final void clearTagTrap() {
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140 probeManager.clearTagTrap();
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141 }
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142
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143 /**
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144 * Access to information visualization services for the specific language.
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145 */
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146 public final Visualizer getVisualizer() {
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147 return visualizer;
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148 }
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149
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150 /**
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151 * Assign guest language-specific visualization support for tools. This must be assigned outside
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152 * the implementation context to avoid build circularities.
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153 */
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154 public final void setVisualizer(Visualizer visualizer) {
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155 this.visualizer = visualizer;
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156 }
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157
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158 /**
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159 * Gets the name of the language, possibly with version number. in short enough form that it
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160 * might be used for an interactive prompt.
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161 */
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162 public abstract String getLanguageShortName();
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163
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164 /**
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165 * Establishes source event reporting.
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166 */
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167 protected abstract void setSourceCallback(SourceCallback sourceCallback);
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168
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169 /**
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170 * Get compiler options specific to this <code>ExecutionContext</code>.
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171 */
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172 public CompilerOptions getCompilerOptions() {
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173 return DefaultCompilerOptions.INSTANCE;
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174 }
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175
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Michael Van De Vanter <michael.van.de.vanter@oracle.com>
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176 }