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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/ExecutionContext.java @ 16067:915ebb306fcc
Truffle/Source: major API revision
- All source-related classes now in com.oracle.truffle.api.source
- SourceFactory replaced with factory methods on Source
- Revision, renaming, and documentation to methods on Source and SourceSection
- NullSourceSection is now a utility class
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Fri, 06 Jun 2014 17:51:47 -0700 |
parents | eedf6c293639 |
children | da146f137cf7 |
rev | line source |
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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 * Returns all existing probes with specific tag, or all probes if {@code tag = null}; empty |
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113 * collection if no probes found. |
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114 */ |
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115 public final Collection<Probe> findProbesTaggedAs(PhylumTag tag) { |
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116 return probeManager.findProbesTaggedAs(tag); |
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117 } |
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118 |
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119 /** |
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120 * Returns all existing probes with first character on a specified line; empty collection if no |
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121 * probes found. |
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122 */ |
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123 public final Collection<Probe> findProbesByLine(LineLocation lineLocation) { |
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124 return probeManager.findProbesByLine(lineLocation); |
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125 } |
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126 |
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127 /** |
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128 * Sets a trap that will make a callback at any AST location where a existing probe holds a |
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129 * specified tag; only one trap may be set at a time. |
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130 * |
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131 * @throws IllegalStateException if a trap is already set |
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132 */ |
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133 public final void setPhylumTrap(PhylumTrap trap) throws IllegalStateException { |
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134 // TODO (mlvdv) consider allowing multiple traps (without inhibiting Truffle inlining) |
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135 probeManager.setPhylumTrap(trap); |
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136 } |
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137 |
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138 /** |
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139 * Clears a trap that will halt execution; only one trap may be set at a time. |
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140 * |
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141 * @throws IllegalStateException if no trap is set. |
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142 */ |
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143 public final void clearPhylumTrap() { |
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144 probeManager.clearPhylumTrap(); |
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145 } |
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146 |
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147 /** |
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148 * Access to information visualization services for the specific language. |
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149 */ |
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150 public final Visualizer getVisualizer() { |
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151 return visualizer; |
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152 } |
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153 |
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154 /** |
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155 * Assign guest language-specific visualization support for tools. This must be assigned outside |
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156 * the implementation context to avoid build circularities. |
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157 */ |
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158 public final void setVisualizer(Visualizer visualizer) { |
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159 this.visualizer = visualizer; |
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160 } |
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161 |
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162 /** |
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163 * Gets the name of the language, possibly with version number. in short enough form that it |
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164 * might be used for an interactive prompt. |
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165 */ |
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166 public abstract String getLanguageShortName(); |
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167 |
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168 /** |
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169 * Establishes source event reporting |
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170 */ |
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171 protected abstract void setSourceCallback(SourceCallback sourceCallback); |
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172 |
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173 } |