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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/instrument/Instrument.java @ 21181:78a4b44420cf
Truffle/Instrumentation: rename the "SplicedNode" Instrument kind to the "ToolEval" instrument kind, along with some redesign based on earlier feedback.
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Sun, 03 May 2015 21:59:55 -0700 |
parents | f96165ecb6f1 |
children | 07c22c0ab91e |
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1 /* |
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2 * Copyright (c) 2013, 2015, 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.instrument; |
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26 |
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27 import com.oracle.truffle.api.*; |
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28 import com.oracle.truffle.api.frame.*; |
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29 import com.oracle.truffle.api.instrument.InstrumentationNode.TruffleEvents; |
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30 import com.oracle.truffle.api.nodes.*; |
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31 import com.oracle.truffle.api.source.*; |
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32 |
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33 // TODO (mlvdv) these statics should not be global. Move them to some kind of context. |
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34 // TODO (mlvdv) migrate factory into .impl (together with Probe)? break out nested classes? |
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35 |
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36 /** |
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37 * A <em>binding</em> between: |
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38 * <ol> |
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39 * <li>A {@link Probe}: a source of <em>execution events</em> taking place at a program location in |
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40 * an executing Truffle AST, and</li> |
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41 * <li>A <em>listener</em>: a consumer of execution events on behalf of an external client. |
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42 * </ol> |
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43 * <p> |
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44 * Client-oriented documentation for the use of Instruments is available online at <a |
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45 * HREF="https://wiki.openjdk.java.net/display/Graal/Listening+for+Execution+Events" |
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46 * >https://wiki.openjdk.java.net/display/Graal/Listening+for+Execution+Events</a> |
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47 * <p> |
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48 * The implementation of Instruments is complicated by the requirement that Truffle be able to clone |
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49 * ASTs at any time. In particular, any instrumentation-supporting Nodes that have been attached to |
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50 * an AST must be cloned along with the AST: AST clones are not permitted to share Nodes. |
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51 * <p> |
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52 * AST cloning is intended to be as <em>transparent</em> as possible to clients. This is encouraged |
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53 * by providing the {@link SimpleInstrumentListener} for clients that need know nothing more than |
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54 * the properties associated with a Probe: it's {@link SourceSection} and any associated instances |
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55 * of {@link SyntaxTag}. |
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56 * <p> |
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57 * AST cloning is <em>not transparent</em> to clients that use the |
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58 * {@link StandardInstrumentListener}, since those event methods identify the concrete Node instance |
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59 * (and thus the AST instance) where the event takes place. |
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60 * <p> |
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61 * <h4>Implementation Notes: the Life Cycle of an {@link Instrument} at a {@link Probe}</h4> |
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62 * <p> |
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63 * <ul> |
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64 * <li>A new Instrument is created in permanent association with a client-provided |
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65 * <em>listener.</em></li> |
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66 * |
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67 * <li>Multiple Instruments may share a single listener.</li> |
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68 * |
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69 * <li>An Instrument does nothing until it is {@linkplain Probe#attach(Instrument) attached} to a |
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70 * Probe, at which time the Instrument begins routing execution events from the Probe's AST location |
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71 * to the Instrument's listener.</li> |
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72 * |
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73 * <li>Neither Instruments nor Probes are {@link Node}s.</li> |
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74 * |
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75 * <li>A Probe has a single source-based location in an AST, but manages a separate |
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76 * <em>instrumentation chain</em> of Nodes at the equivalent location in each clone of the AST.</li> |
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77 * <li>When a probed AST is cloned, the instrumentation chain associated with each Probe is cloned |
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78 * along with the rest of the AST.</li> |
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79 * |
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80 * <li>When a new Instrument (for example an instance of {@link SimpleInstrument} is attached to a |
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81 * Probe, the Instrument inserts a new instance of its private Node type, |
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82 * {@link SimpleInstrument.SimpleInstrumentNode}, into <em>each of the instrument chains</em> |
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83 * managed by the Probe, i.e. one node instance per existing clone of the AST.</li> |
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84 * |
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85 * <li>If an Instrument is attached to a Probe in an AST that subsequently gets cloned, then the |
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86 * Instrument's private Node type will be cloned along with the rest of the the AST.</li> |
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87 * <li>Each Instrument's private Node type is a dynamic inner class whose only state is in the |
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88 * shared (outer) Instrument instance; that state includes a reference to the Instrument's listener. |
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89 * </li> |
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90 * |
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91 * <li>When an Instrument that has been attached to a Probe is {@linkplain #dispose() disposed}, the |
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92 * Instrument searches every instrument chain associated with the Probe and removes the instance of |
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93 * its private Node type.</li> |
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94 * |
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95 * <li>Attaching and disposing an Instrument at a Probe <em>deoptimizes</em> any compilations of the |
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96 * AST.</li> |
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97 * |
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98 * </ul> |
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99 * |
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100 * @see Probe |
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101 * @see TruffleEvents |
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102 */ |
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103 public abstract class Instrument { |
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104 |
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105 /** |
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106 * Creates a <em>Simple Instrument</em>: this Instrument routes execution events to a |
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107 * client-provided listener. |
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108 * |
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109 * @param listener a listener for execution events |
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110 * @param instrumentInfo optional description of the instrument's role, intended for debugging. |
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111 * @return a new instrument, ready for attachment at a probe |
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112 */ |
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113 public static Instrument create(SimpleInstrumentListener listener, String instrumentInfo) { |
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114 return new SimpleInstrument(listener, instrumentInfo); |
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115 } |
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116 |
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117 /** |
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118 * Creates a <em>Standard Instrument</em>: this Instrument routes execution events, together |
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119 * with access to Truffle execution state, to a client-provided listener. |
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120 * |
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121 * @param standardListener a listener for execution events and execution state |
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122 * @param instrumentInfo optional description of the instrument's role, intended for debugging. |
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123 * @return a new instrument, ready for attachment at a probe |
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124 */ |
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125 public static Instrument create(StandardInstrumentListener standardListener, String instrumentInfo) { |
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126 return new StandardInstrument(standardListener, instrumentInfo); |
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127 } |
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128 |
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129 /** |
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130 * Creates a <em>Tool Eval Instrument</em>: this Instrument executes efficiently, subject to |
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131 * full Truffle optimization, a client-provided AST fragment every time the Probed node is |
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132 * entered. |
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133 * |
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134 * @param toolEvalNodeFactory provider of AST fragments on behalf of the client |
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135 * @param instrumentInfo optional description of the instrument's role, intended for debugging. |
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136 * @return a new instrument, ready for attachment at a probe |
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137 */ |
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138 public static Instrument create(ToolEvalNodeFactory toolEvalNodeFactory, String instrumentInfo) { |
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139 return new ToolEvalInstrument(toolEvalNodeFactory, instrumentInfo); |
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140 } |
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141 |
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142 // TODO (mlvdv) experimental |
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143 /** |
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144 * For implementation testing. |
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145 */ |
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146 public static Instrument create(TruffleOptListener listener) { |
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147 return new TruffleOptInstrument(listener, null); |
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148 } |
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149 |
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150 /** |
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151 * Has this instrument been disposed? stays true once set. |
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152 */ |
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153 private boolean isDisposed = false; |
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154 |
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155 protected Probe probe = null; |
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156 |
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157 /** |
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158 * Optional documentation, mainly for debugging. |
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159 */ |
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160 private final String instrumentInfo; |
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161 |
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162 private Instrument(String instrumentInfo) { |
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163 this.instrumentInfo = instrumentInfo; |
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164 } |
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165 |
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166 /** |
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167 * Gets the {@link Probe} to which this Instrument is currently attached: {@code null} if not |
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168 * yet attached to a Probe or if this Instrument has been {@linkplain #dispose() disposed}. |
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169 */ |
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170 public Probe getProbe() { |
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171 return probe; |
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172 } |
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173 |
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174 /** |
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175 * Removes this Instrument from the Probe to which it attached and renders this Instrument |
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176 * inert. |
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177 * |
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178 * @throws IllegalStateException if this instrument has already been disposed |
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179 */ |
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180 public void dispose() throws IllegalStateException { |
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181 if (isDisposed) { |
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182 throw new IllegalStateException("Attempt to dispose an already disposed Instrumennt"); |
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183 } |
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184 if (probe != null) { |
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185 // It's attached |
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186 probe.disposeInstrument(this); |
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187 probe = null; |
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188 } |
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189 this.isDisposed = true; |
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190 } |
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191 |
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192 /** |
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193 * For internal implementation only. |
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194 */ |
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195 void setAttachedTo(Probe probe) { |
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196 this.probe = probe; |
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197 } |
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198 |
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199 /** |
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200 * Has this instrument been disposed and rendered unusable? |
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201 */ |
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202 boolean isDisposed() { |
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203 return isDisposed; |
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204 } |
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205 |
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206 abstract AbstractInstrumentNode addToChain(AbstractInstrumentNode nextNode); |
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207 |
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208 /** |
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209 * Removes this instrument from an instrument chain. |
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210 */ |
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211 abstract AbstractInstrumentNode removeFromChain(AbstractInstrumentNode instrumentNode); |
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212 |
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213 /** |
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214 * An instrument that propagates events to an instance of {@link SimpleInstrumentListener}. |
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215 */ |
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216 private static final class SimpleInstrument extends Instrument { |
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217 |
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218 /** |
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219 * Tool-supplied listener for events. |
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220 */ |
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221 private final SimpleInstrumentListener simpleListener; |
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222 |
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223 private SimpleInstrument(SimpleInstrumentListener simpleListener, String instrumentInfo) { |
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224 super(instrumentInfo); |
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225 this.simpleListener = simpleListener; |
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226 } |
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227 |
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228 @Override |
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229 AbstractInstrumentNode addToChain(AbstractInstrumentNode nextNode) { |
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230 return new SimpleInstrumentNode(nextNode); |
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231 } |
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232 |
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233 @Override |
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234 AbstractInstrumentNode removeFromChain(AbstractInstrumentNode instrumentNode) { |
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235 boolean found = false; |
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236 if (instrumentNode != null) { |
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237 if (instrumentNode.getInstrument() == this) { |
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238 // Found the match at the head of the chain |
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239 return instrumentNode.nextInstrumentNode; |
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240 } |
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241 // Match not at the head of the chain; remove it. |
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242 found = instrumentNode.removeFromChain(SimpleInstrument.this); |
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243 } |
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244 if (!found) { |
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245 throw new IllegalStateException("Couldn't find instrument node to remove: " + this); |
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246 } |
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247 return instrumentNode; |
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248 } |
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249 |
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250 /** |
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251 * Node that implements a {@link SimpleInstrument} in a particular AST. |
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252 */ |
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253 @NodeInfo(cost = NodeCost.NONE) |
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254 private final class SimpleInstrumentNode extends AbstractInstrumentNode { |
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255 |
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256 private SimpleInstrumentNode(AbstractInstrumentNode nextNode) { |
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257 super(nextNode); |
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258 } |
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259 |
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260 public void enter(Node node, VirtualFrame vFrame) { |
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261 SimpleInstrument.this.simpleListener.enter(SimpleInstrument.this.probe); |
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262 if (nextInstrumentNode != null) { |
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263 nextInstrumentNode.enter(node, vFrame); |
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264 } |
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265 } |
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266 |
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267 public void returnVoid(Node node, VirtualFrame vFrame) { |
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268 SimpleInstrument.this.simpleListener.returnVoid(SimpleInstrument.this.probe); |
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269 if (nextInstrumentNode != null) { |
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270 nextInstrumentNode.returnVoid(node, vFrame); |
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271 } |
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272 } |
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273 |
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274 public void returnValue(Node node, VirtualFrame vFrame, Object result) { |
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275 SimpleInstrument.this.simpleListener.returnValue(SimpleInstrument.this.probe, result); |
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276 if (nextInstrumentNode != null) { |
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277 nextInstrumentNode.returnValue(node, vFrame, result); |
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278 } |
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279 } |
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280 |
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281 public void returnExceptional(Node node, VirtualFrame vFrame, Exception exception) { |
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282 SimpleInstrument.this.simpleListener.returnExceptional(SimpleInstrument.this.probe, exception); |
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283 if (nextInstrumentNode != null) { |
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284 nextInstrumentNode.returnExceptional(node, vFrame, exception); |
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285 } |
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286 } |
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287 |
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288 public String instrumentationInfo() { |
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289 final String info = getInstrumentInfo(); |
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290 return info != null ? info : simpleListener.getClass().getSimpleName(); |
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291 } |
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292 } |
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293 } |
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294 |
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295 /** |
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296 * An instrument that propagates events to an instance of {@link StandardInstrumentListener}. |
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297 */ |
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298 private static final class StandardInstrument extends Instrument { |
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299 |
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300 /** |
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301 * Tool-supplied listener for AST events. |
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302 */ |
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303 private final StandardInstrumentListener standardListener; |
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304 |
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305 private StandardInstrument(StandardInstrumentListener standardListener, String instrumentInfo) { |
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306 super(instrumentInfo); |
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307 this.standardListener = standardListener; |
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308 } |
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309 |
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310 @Override |
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311 AbstractInstrumentNode addToChain(AbstractInstrumentNode nextNode) { |
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312 return new StandardInstrumentNode(nextNode); |
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313 } |
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314 |
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315 @Override |
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316 AbstractInstrumentNode removeFromChain(AbstractInstrumentNode instrumentNode) { |
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317 boolean found = false; |
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318 if (instrumentNode != null) { |
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319 if (instrumentNode.getInstrument() == this) { |
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320 // Found the match at the head of the chain |
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321 return instrumentNode.nextInstrumentNode; |
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322 } |
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323 // Match not at the head of the chain; remove it. |
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324 found = instrumentNode.removeFromChain(StandardInstrument.this); |
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325 } |
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326 if (!found) { |
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327 throw new IllegalStateException("Couldn't find instrument node to remove: " + this); |
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328 } |
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329 return instrumentNode; |
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330 } |
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331 |
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332 /** |
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333 * Node that implements a {@link StandardInstrument} in a particular AST. |
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334 */ |
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335 @NodeInfo(cost = NodeCost.NONE) |
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336 private final class StandardInstrumentNode extends AbstractInstrumentNode { |
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337 |
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338 private StandardInstrumentNode(AbstractInstrumentNode nextNode) { |
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339 super(nextNode); |
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340 } |
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341 |
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342 public void enter(Node node, VirtualFrame vFrame) { |
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343 standardListener.enter(StandardInstrument.this.probe, node, vFrame); |
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344 if (nextInstrumentNode != null) { |
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345 nextInstrumentNode.enter(node, vFrame); |
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346 } |
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347 } |
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348 |
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349 public void returnVoid(Node node, VirtualFrame vFrame) { |
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350 standardListener.returnVoid(StandardInstrument.this.probe, node, vFrame); |
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351 if (nextInstrumentNode != null) { |
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352 nextInstrumentNode.returnVoid(node, vFrame); |
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353 } |
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354 } |
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355 |
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356 public void returnValue(Node node, VirtualFrame vFrame, Object result) { |
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357 standardListener.returnValue(StandardInstrument.this.probe, node, vFrame, result); |
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358 if (nextInstrumentNode != null) { |
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359 nextInstrumentNode.returnValue(node, vFrame, result); |
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360 } |
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361 } |
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362 |
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363 public void returnExceptional(Node node, VirtualFrame vFrame, Exception exception) { |
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364 standardListener.returnExceptional(StandardInstrument.this.probe, node, vFrame, exception); |
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365 if (nextInstrumentNode != null) { |
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366 nextInstrumentNode.returnExceptional(node, vFrame, exception); |
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367 } |
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368 } |
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369 |
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370 public String instrumentationInfo() { |
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371 final String info = getInstrumentInfo(); |
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372 return info != null ? info : standardListener.getClass().getSimpleName(); |
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373 } |
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374 } |
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375 } |
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376 |
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377 /** |
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378 * An instrument that allows clients to provide an AST fragment to be executed directly from |
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379 * within a Probe's <em>instrumentation chain</em>, and thus directly in the executing Truffle |
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380 * AST with potential for full optimization. |
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381 */ |
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382 private static final class ToolEvalInstrument extends Instrument { |
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383 |
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384 /** |
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385 * Client-provided supplier of new node instances to attach. |
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386 */ |
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387 private final ToolEvalNodeFactory toolEvalNodeFactory; |
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388 |
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389 private ToolEvalInstrument(ToolEvalNodeFactory toolEvalNodeFactory, String instrumentInfo) { |
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390 super(instrumentInfo); |
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391 this.toolEvalNodeFactory = toolEvalNodeFactory; |
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392 |
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393 } |
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394 |
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395 @Override |
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396 AbstractInstrumentNode addToChain(AbstractInstrumentNode nextNode) { |
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397 return new ToolEvalNodeInstrumentNode(nextNode); |
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398 } |
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399 |
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400 @Override |
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401 AbstractInstrumentNode removeFromChain(AbstractInstrumentNode instrumentNode) { |
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402 boolean found = false; |
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403 if (instrumentNode != null) { |
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404 if (instrumentNode.getInstrument() == this) { |
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405 // Found the match at the head of the chain |
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406 return instrumentNode.nextInstrumentNode; |
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407 } |
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408 // Match not at the head of the chain; remove it. |
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409 found = instrumentNode.removeFromChain(ToolEvalInstrument.this); |
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410 } |
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411 if (!found) { |
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412 throw new IllegalStateException("Couldn't find instrument node to remove: " + this); |
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413 } |
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414 return instrumentNode; |
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415 } |
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416 |
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417 /** |
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418 * Node that implements a {@link ToolEvalInstrument} in a particular AST. |
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419 */ |
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420 @NodeInfo(cost = NodeCost.NONE) |
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421 private final class ToolEvalNodeInstrumentNode extends AbstractInstrumentNode { |
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422 |
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423 @Child ToolEvalNode toolEvalNode; |
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424 |
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425 private ToolEvalNodeInstrumentNode(AbstractInstrumentNode nextNode) { |
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426 super(nextNode); |
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427 } |
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428 |
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429 public void enter(Node node, VirtualFrame vFrame) { |
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430 if (toolEvalNode == null) { |
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431 final ToolEvalNode newToolEvalNodeNode = ToolEvalInstrument.this.toolEvalNodeFactory.createToolEvalNode(ToolEvalInstrument.this.probe, node); |
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432 if (newToolEvalNodeNode != null) { |
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433 toolEvalNode = newToolEvalNodeNode; |
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434 adoptChildren(); |
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435 ToolEvalInstrument.this.probe.invalidateProbeUnchanged(); |
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436 } |
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437 } |
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438 if (toolEvalNode != null) { |
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439 // TODO (mlvdv) should report exception ; non-trivial architectural change |
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440 toolEvalNode.executeToolEvalNode(node, vFrame); |
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441 } |
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442 if (nextInstrumentNode != null) { |
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443 nextInstrumentNode.enter(node, vFrame); |
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444 } |
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445 } |
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446 |
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447 public void returnVoid(Node node, VirtualFrame vFrame) { |
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448 if (nextInstrumentNode != null) { |
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449 nextInstrumentNode.returnVoid(node, vFrame); |
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450 } |
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451 } |
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452 |
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453 public void returnValue(Node node, VirtualFrame vFrame, Object result) { |
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454 if (nextInstrumentNode != null) { |
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455 nextInstrumentNode.returnValue(node, vFrame, result); |
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456 } |
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457 } |
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458 |
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459 public void returnExceptional(Node node, VirtualFrame vFrame, Exception exception) { |
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460 if (nextInstrumentNode != null) { |
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461 nextInstrumentNode.returnExceptional(node, vFrame, exception); |
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462 } |
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463 } |
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464 |
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465 public String instrumentationInfo() { |
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466 final String info = getInstrumentInfo(); |
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467 return info != null ? info : toolEvalNodeFactory.getClass().getSimpleName(); |
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468 } |
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469 } |
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470 } |
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471 |
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472 public interface TruffleOptListener { |
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473 void notifyIsCompiled(boolean isCompiled); |
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474 } |
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475 |
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476 private static final class TruffleOptInstrument extends Instrument { |
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477 |
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478 private final TruffleOptListener toolOptListener; |
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479 |
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480 private TruffleOptInstrument(TruffleOptListener listener, String instrumentInfo) { |
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481 super(instrumentInfo); |
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482 this.toolOptListener = listener; |
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483 } |
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484 |
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485 @Override |
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486 AbstractInstrumentNode addToChain(AbstractInstrumentNode nextNode) { |
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487 return new TruffleOptInstrumentNode(nextNode); |
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488 } |
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489 |
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490 @Override |
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491 AbstractInstrumentNode removeFromChain(AbstractInstrumentNode instrumentNode) { |
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492 boolean found = false; |
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493 if (instrumentNode != null) { |
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494 if (instrumentNode.getInstrument() == this) { |
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495 // Found the match at the head of the chain |
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496 return instrumentNode.nextInstrumentNode; |
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497 } |
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498 // Match not at the head of the chain; remove it. |
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499 found = instrumentNode.removeFromChain(TruffleOptInstrument.this); |
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500 } |
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501 if (!found) { |
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502 throw new IllegalStateException("Couldn't find instrument node to remove: " + this); |
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503 } |
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504 return instrumentNode; |
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505 } |
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506 |
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507 @NodeInfo(cost = NodeCost.NONE) |
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508 private final class TruffleOptInstrumentNode extends AbstractInstrumentNode { |
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509 |
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510 private boolean isCompiled; |
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511 |
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512 private TruffleOptInstrumentNode(AbstractInstrumentNode nextNode) { |
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513 super(nextNode); |
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514 this.isCompiled = CompilerDirectives.inCompiledCode(); |
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515 } |
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516 |
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517 public void enter(Node node, VirtualFrame vFrame) { |
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518 if (this.isCompiled != CompilerDirectives.inCompiledCode()) { |
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519 this.isCompiled = CompilerDirectives.inCompiledCode(); |
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520 TruffleOptInstrument.this.toolOptListener.notifyIsCompiled(this.isCompiled); |
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521 } |
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522 if (nextInstrumentNode != null) { |
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523 nextInstrumentNode.enter(node, vFrame); |
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524 } |
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525 } |
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526 |
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527 public void returnVoid(Node node, VirtualFrame vFrame) { |
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528 if (nextInstrumentNode != null) { |
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529 nextInstrumentNode.returnVoid(node, vFrame); |
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530 } |
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531 } |
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532 |
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533 public void returnValue(Node node, VirtualFrame vFrame, Object result) { |
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534 if (nextInstrumentNode != null) { |
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535 nextInstrumentNode.returnValue(node, vFrame, result); |
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536 } |
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537 } |
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538 |
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539 public void returnExceptional(Node node, VirtualFrame vFrame, Exception exception) { |
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540 if (nextInstrumentNode != null) { |
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541 nextInstrumentNode.returnExceptional(node, vFrame, exception); |
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542 } |
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543 } |
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544 |
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545 public String instrumentationInfo() { |
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546 final String info = getInstrumentInfo(); |
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547 return info != null ? info : toolOptListener.getClass().getSimpleName(); |
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548 } |
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549 } |
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550 } |
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551 |
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552 @NodeInfo(cost = NodeCost.NONE) |
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553 abstract class AbstractInstrumentNode extends Node implements TruffleEvents, InstrumentationNode { |
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554 |
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555 @Child protected AbstractInstrumentNode nextInstrumentNode; |
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556 |
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557 protected AbstractInstrumentNode(AbstractInstrumentNode nextNode) { |
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558 this.nextInstrumentNode = nextNode; |
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559 } |
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560 |
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561 @Override |
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562 public boolean isInstrumentable() { |
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563 return false; |
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564 } |
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565 |
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566 /** |
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567 * Gets the instrument that created this node. |
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568 */ |
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569 private Instrument getInstrument() { |
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570 return Instrument.this; |
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571 } |
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572 |
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573 /** |
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574 * Removes the node from this chain that was added by a particular instrument, assuming that |
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575 * the head of the chain is not the one to be replaced. This is awkward, but is required |
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576 * because {@link Node#replace(Node)} won't take a {@code null} argument. This doesn't work |
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577 * for the tail of the list, which would be replacing itself with null. So the replacement |
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578 * must be directed the parent of the node being removed. |
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579 */ |
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580 private boolean removeFromChain(Instrument instrument) { |
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581 assert getInstrument() != instrument; |
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582 if (nextInstrumentNode == null) { |
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583 return false; |
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584 } |
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585 if (nextInstrumentNode.getInstrument() == instrument) { |
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586 // Next is the one to remove |
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587 if (nextInstrumentNode.nextInstrumentNode == null) { |
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588 // Next is at the tail; just forget |
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589 nextInstrumentNode = null; |
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590 } else { |
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591 // Replace next with its successor |
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592 nextInstrumentNode.replace(nextInstrumentNode.nextInstrumentNode); |
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593 } |
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594 return true; |
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595 } |
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596 return nextInstrumentNode.removeFromChain(instrument); |
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597 } |
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598 |
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599 protected String getInstrumentInfo() { |
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600 return Instrument.this.instrumentInfo; |
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601 } |
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602 } |
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603 } |