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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/ExecutionContext.java @ 15891:09ac9ac9c4fc

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Truffle: SourceManager renamed to SourceFactory - All methods are static, no longer accessed via ExecutionContext - Sources are indexed with weak references - File content caching is now optional; off by default
author Michael Van De Vanter <michael.van.de.vanter@oracle.com>
date Sat, 24 May 2014 10:34:43 -0700
parents eb947cc7bff9
children eedf6c293639
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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 * Registers a tool interested in being notified about the insertion of a newly created
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75 * {@link Probe} into a Truffle AST.
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76 */
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77 public final void addProbeListener(ProbeListener listener) {
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78 probeManager.addProbeListener(listener);
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79 }
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80
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81 /**
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82 * Return the (possibly newly created) {@link Probe} uniquely associated with a particular
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83 * source code location. A newly created probe carries no tags.
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84 *
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85 * @return a probe uniquely associated with an extent of guest language source code.
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86 */
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87 public final Probe getProbe(SourceSection sourceSection) {
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88 return probeManager.getProbe(sourceSection);
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89 }
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90
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91 /**
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92 * Returns all existing probes with specific tag, or all probes if {@code tag = null}; empty
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93 * collection if no probes found.
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94 */
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95 public final Collection<Probe> findProbesTaggedAs(PhylumTag tag) {
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96 return probeManager.findProbesTaggedAs(tag);
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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 first character on a specified line; empty collection if no
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101 * probes found.
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102 */
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103 public final Collection<Probe> findProbesByLine(SourceLineLocation lineLocation) {
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104 return probeManager.findProbesByLine(lineLocation);
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105 }
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106
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107 /**
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108 * Sets a trap that will make a callback at any AST location where a existing probe holds a
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109 * specified tag; only one trap may be set at a time.
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110 *
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111 * @throws IllegalStateException if a trap is already set
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112 */
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113 public final void setPhylumTrap(PhylumTrap trap) throws IllegalStateException {
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114 // TODO (mlvdv) consider allowing multiple traps (without inhibiting Truffle inlining)
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115 probeManager.setPhylumTrap(trap);
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116 }
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117
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118 /**
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119 * Clears a trap that will halt execution; only one trap may be set at a time.
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120 *
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121 * @throws IllegalStateException if no trap is set.
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122 */
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123 public final void clearPhylumTrap() {
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124 probeManager.clearPhylumTrap();
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125 }
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126
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127 /**
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128 * Access to information visualization services for the specific language.
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129 */
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130 public final Visualizer getVisualizer() {
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131 return visualizer;
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132 }
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133
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134 /**
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135 * Assign guest language-specific visualization support for tools. This must be assigned outside
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136 * the implementation context to avoid build circularities.
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137 */
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138 public final void setVisualizer(Visualizer visualizer) {
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139 this.visualizer = visualizer;
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140 }
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141
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142 /**
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143 * Gets the name of the language, possibly with version number. in short enough form that it
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144 * might be used for an interactive prompt.
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145 */
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146 public abstract String getLanguageShortName();
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147
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148 /**
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149 * Establishes source event reporting
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150 */
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151 protected abstract void setSourceCallback(SourceCallback sourceCallback);
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152
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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.
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents:
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