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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/instrument/Instrument.java @ 19818:907128d02b31
Truffle/Instrumentation: For clients of Instrumentation, replace the TruffleEventListener interface with two: InstrumentListener, and ASTInstrumentListener. The former is simple, completely Truffle-safe (can't affect Truffle execution), and designed for simple tools. The latter is similar to the previous interface.
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Thu, 12 Mar 2015 18:03:05 -0700 |
parents | 10a1fc5e3209 |
children | 2e3cc2a27711 |
rev | line source |
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Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
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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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Michael Van De Vanter <michael.van.de.vanter@oracle.com>
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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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Michael Van De Vanter <michael.van.de.vanter@oracle.com>
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9 * by Oracle in the LICENSE file that accompanied this code. |
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Michael Van De Vanter <michael.van.de.vanter@oracle.com>
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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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Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
0c6d8a08e31b
Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
0c6d8a08e31b
Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
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15 * accompanied this code). |
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Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
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16 * |
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Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
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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. |
0c6d8a08e31b
Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
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20 * |
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Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
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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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Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
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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.CompilerDirectives.TruffleBoundary; |
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29 import com.oracle.truffle.api.frame.*; |
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30 import com.oracle.truffle.api.instrument.InstrumentationNode.TruffleEvents; |
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31 import com.oracle.truffle.api.instrument.impl.*; |
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32 import com.oracle.truffle.api.nodes.*; |
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33 import com.oracle.truffle.api.source.*; |
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34 |
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35 // TODO (mlvdv) migrate some of this to external documentation. |
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36 // TODO (mlvdv) move all this to a factory implemented in .impl (together with Probe), |
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37 // then break out some of the nested classes into package privates. |
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Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
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38 /** |
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Truffle Instrumentation: major API revision, based around the Probe and Instrument classes; add Instrumentable API for language implementors, with most details automated; reimplemented to handle AST splitting automatically; more JUnit tests.
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
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39 * A dynamically added/removed binding between a {@link Probe}, which provides notification of |
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Truffle/Instrumentation: For clients of Instrumentation, replace the TruffleEventListener interface with two: InstrumentListener, and ASTInstrumentListener. The former is simple, completely Truffle-safe (can't affect Truffle execution), and designed for simple tools. The latter is similar to the previous interface.
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40 * <em>execution events</em> taking place at a {@link Node} in a Guest Language (GL) Truffle AST, |
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Truffle/Instrumentation: For clients of Instrumentation, replace the TruffleEventListener interface with two: InstrumentListener, and ASTInstrumentListener. The former is simple, completely Truffle-safe (can't affect Truffle execution), and designed for simple tools. The latter is similar to the previous interface.
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41 * and a <em>listener</em>, which consumes notifications on behalf of an external tool. There are at |
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Truffle/Instrumentation: For clients of Instrumentation, replace the TruffleEventListener interface with two: InstrumentListener, and ASTInstrumentListener. The former is simple, completely Truffle-safe (can't affect Truffle execution), and designed for simple tools. The latter is similar to the previous interface.
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42 * present two kinds of listeners that be used: |
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Truffle/Instrumentation: For clients of Instrumentation, replace the TruffleEventListener interface with two: InstrumentListener, and ASTInstrumentListener. The former is simple, completely Truffle-safe (can't affect Truffle execution), and designed for simple tools. The latter is similar to the previous interface.
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43 * <ol> |
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44 * <li>{@link InstrumentListener} is the simplest and is intended for tools that require no access |
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Truffle/Instrumentation: For clients of Instrumentation, replace the TruffleEventListener interface with two: InstrumentListener, and ASTInstrumentListener. The former is simple, completely Truffle-safe (can't affect Truffle execution), and designed for simple tools. The latter is similar to the previous interface.
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45 * to the <em>internal execution state</em> of the Truffle execution, only that execution has passed |
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46 * through a particular location in the program. Information about that location is made available |
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47 * via the {@link Probe} argument in notification methods, including the {@linkplain SourceSection |
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48 * source location} of the node and any {@linkplain SyntaxTag tags} that have been applied to the |
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Truffle/Instrumentation: For clients of Instrumentation, replace the TruffleEventListener interface with two: InstrumentListener, and ASTInstrumentListener. The former is simple, completely Truffle-safe (can't affect Truffle execution), and designed for simple tools. The latter is similar to the previous interface.
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49 * node.</li> |
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50 * <li>{@link ASTInstrumentListener} reports the same events and {@link Probe} argument, but |
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Truffle/Instrumentation: For clients of Instrumentation, replace the TruffleEventListener interface with two: InstrumentListener, and ASTInstrumentListener. The former is simple, completely Truffle-safe (can't affect Truffle execution), and designed for simple tools. The latter is similar to the previous interface.
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51 * additionally provides access to the execution state via the explicit {@link Node} and |
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52 * {@link Frame} at the current execution site.</li> |
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53 * </ol> |
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54 * <p> |
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Truffle Instrumentation: major API revision, based around the Probe and Instrument classes; add Instrumentable API for language implementors, with most details automated; reimplemented to handle AST splitting automatically; more JUnit tests.
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55 * <h4>Summary: How to "instrument" an AST location:</h4> |
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56 * <p> |
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57 * <ol> |
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58 * <li>Create an implementation of a <em>listener</em> interface.</li> |
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59 * <li>Create an Instrument via factory methods |
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Truffle/Instrumentation: For clients of Instrumentation, replace the TruffleEventListener interface with two: InstrumentListener, and ASTInstrumentListener. The former is simple, completely Truffle-safe (can't affect Truffle execution), and designed for simple tools. The latter is similar to the previous interface.
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60 * {@link Instrument#create(InstrumentListener, String)} or |
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61 * {@link Instrument#create(ASTInstrumentListener, String)}.</li> |
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62 * <li>"Attach" the Instrument to a Probe via {@link Probe#attach(Instrument)}, at which point event |
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63 * notifications begin to arrive at the listener.</li> |
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64 * <li>When no longer needed, "detach" the Instrument via {@link ASTInstrument#dispose()}, at which |
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65 * point event notifications to the listener cease, and the Instrument becomes unusable.</li> |
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66 * </ol> |
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67 * <p> |
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68 * <h4>Options for creating listeners:</h4> |
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69 * <p> |
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70 * <ol> |
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71 * <li>Implement one of the <em>listener interfaces</em>: {@link InstrumentListener} or |
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72 * {@link ASTInstrumentListener} . Their event handling methods account for both the entry into an |
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73 * AST node (about to call) and three possible kinds of <em>execution return</em> from an AST node.</li> |
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74 * <li>Extend one of the <em>helper implementations</em>: {@link DefaultInstrumentListener} or |
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75 * {@link DefaultASTInstrumentListener}. These provide no-op implementation of every listener |
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76 * method, so only the methods of interest need to be overridden.</li> |
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77 * <li>Extend one of the <em>helper implementations</em>: {@link SimpleInstrumentListener} or |
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78 * {@link SimpleASTInstrumentListener}. These re-route all <em>execution returns</em> to a single |
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79 * method, ignoring return values, so only two methods (for "enter" and "return") will notify all |
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80 * events.</li> |
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81 * </ol> |
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82 * <p> |
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83 * <h4>General guidelines for {@link ASTInstrumentListener} implementation:</h4> |
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84 * <p> |
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85 * Unlike the listener interface {@link InstrumentListener}, which isolates implementations |
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86 * completely from Truffle internals (and is thus <em>Truffle-safe</em>), implementations of |
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87 * {@link ASTInstrumentListener} can interact directly with (and potentially affect) Truffle |
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88 * execution in general and Truffle optimization in particular. For example, it is possible to |
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89 * implement a debugger with this interface. |
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90 * </p> |
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91 * <p> |
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92 * As a consequence, implementations of {@link ASTInstrumentListener} effectively become part of the |
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93 * Truffle execution and must be coded according to general guidelines for Truffle implementations. |
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94 * For example: |
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95 * <ul> |
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96 * <li>Do not store {@link Frame} or {@link Node} references in fields.</li> |
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97 * <li>Prefer {@code final} fields and (where performance is important) short methods.</li> |
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98 * <li>If needed, pass along the {@link VirtualFrame} reference from an event notification as far as |
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99 * possible through code that is expected to be inlined, since this incurs no runtime overhead. When |
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100 * access to frame data is needed, substitute a more expensive {@linkplain Frame#materialize() |
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101 * materialized} representation of the frame.</li> |
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102 * <li>If a listener calls back to its tool during event handling, and if performance is an issue, |
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103 * then this should be through a final "callback" field in the instrument, and the called methods |
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104 * should be minimal.</li> |
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105 * <li>On the other hand, implementations should prevent Truffle from inlining beyond a reasonable |
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106 * point with the method annotation {@link TruffleBoundary}.</li> |
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107 * <li>The implicit "outer" pointer in a non-static inner class is a useful (and |
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108 * Truffle-optimizable) way to implement callbacks to owner tools.</li> |
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109 * <li>Primitive-valued return events are boxed for event notification, but Truffle will eliminate |
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110 * the boxing if they are cast back to their primitive values quickly (in particular before crossing |
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111 * any {@link TruffleBoundary} annotations). |
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112 * </ul> |
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113 * <p> |
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114 * <h4>Allowing for AST cloning:</h4> |
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115 * <p> |
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116 * Truffle routinely <em>clones</em> ASTs, which has consequences for implementations of |
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117 * {@link ASTInstrumentListener} (but not for implementations of {@link InstrumentListener}, from |
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118 * which cloning is hidden). |
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119 * <ul> |
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120 * <li>Even though a {@link Probe} is uniquely associated with a particular location in the |
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121 * executing Guest Language program, execution events at that location will in general be |
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122 * implemented by different {@link Node} instances, i.e. <em>clones</em> of the originally probed |
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123 * node.</li> |
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124 * <li>Because of <em>cloning</em> the {@link Node} supplied with notifications to a particular |
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125 * listener will vary, but because they all represent the same GL program location the events should |
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126 * be treated as equivalent for most purposes.</li> |
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127 * </ul> |
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128 * <p> |
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129 * <h4>Access to execution state via {@link ASTInstrumentListener}:</h4> |
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130 * <p> |
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131 * <ul> |
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132 * <li>Notification arguments provide primary access to the GL program's execution states: |
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133 * <ul> |
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134 * <li>{@link Node}: the concrete node (in one of the AST's clones) from which the event originated. |
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135 * </li> |
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136 * <li>{@link VirtualFrame}: the current execution frame. |
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137 * </ul> |
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138 * <li>Truffle global information is available, for example the execution |
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139 * {@linkplain TruffleRuntime#iterateFrames(FrameInstanceVisitor) stack}.</li> |
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140 * <li>Additional API access to execution state may be added in the future.</li> |
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141 * </ul> |
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142 * <p> |
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143 * <h4>Activating and deactivating Instruments:</h4> |
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144 * <p> |
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145 * Instruments are <em>single-use</em>: |
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146 * <ul> |
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147 * <li>An instrument becomes active only when <em>attached</em> to a Probe via |
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148 * {@link Probe#attach(Instrument)}, and it may only be attached to a single Probe. It is a runtime |
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149 * error to attempt attaching a previously attached instrument.</li> |
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150 * <li>Attaching an instrument modifies every existing clone of the AST to which it is being |
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151 * attached, which can trigger deoptimization.</li> |
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152 * <li>The method {@link Instrument#dispose()} makes an instrument inactive by removing it from the |
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153 * Probe to which it was attached and rendering it permanently inert.</li> |
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154 * <li>Disposal removes the implementation of an instrument from all ASTs to which it was attached, |
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155 * which can trigger deoptimization.</li> |
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156 * </ul> |
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157 * <p> |
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158 * <h4>Sharing listeners:</h4> |
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159 * <p> |
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160 * Although an Instrument may only be attached to a single Probe, a listener can be shared among |
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161 * multiple Instruments. This can be useful for observing events that might happen at different |
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162 * locations in a single AST, for example all assignments to a particular variable. In this case a |
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163 * new Instrument would be created and attached at each assignment node, but all the Instruments |
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164 * would be created with the same listener. |
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165 * <p> |
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166 * <strong>Disclaimer:</strong> experimental; under development. |
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167 * |
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168 * @see Probe |
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169 * @see TruffleEvents |
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170 */ |
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171 public abstract class Instrument { |
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172 |
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173 /** |
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174 * Creates an instrument that will route execution events to a listener. |
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175 * |
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176 * @param listener a minimal listener for event generated by the instrument. |
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177 * @param instrumentInfo optional description of the instrument's role, useful for debugging. |
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178 * @return a new instrument, ready for attachment at a probe |
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179 */ |
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180 public static Instrument create(InstrumentListener listener, String instrumentInfo) { |
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181 return new BasicInstrument(listener, instrumentInfo); |
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182 } |
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183 |
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184 /** |
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185 * Creates an instrument that will route execution events to a listener, along with access to |
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186 * internal execution state. |
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187 * |
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188 * @param astListener a listener for event generated by the instrument that provides access to |
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189 * internal execution state |
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190 * @param instrumentInfo optional description of the instrument's role, useful for debugging. |
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191 * @return a new instrument, ready for attachment at a probe |
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192 */ |
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193 public static Instrument create(ASTInstrumentListener astListener, String instrumentInfo) { |
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194 return new ASTInstrument(astListener, instrumentInfo); |
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195 } |
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196 |
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197 // TODO (mlvdv) experimental |
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198 /** |
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199 * For implementation testing. |
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200 */ |
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201 public static Instrument create(TruffleOptListener listener) { |
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202 return new TruffleOptInstrument(listener, null); |
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203 } |
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204 |
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205 /** |
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206 * Has this instrument been disposed? stays true once set. |
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207 */ |
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208 private boolean isDisposed = false; |
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209 |
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210 protected Probe probe = null; |
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211 |
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212 /** |
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213 * Optional documentation, mainly for debugging. |
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214 */ |
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215 private final String instrumentInfo; |
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216 |
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217 private Instrument(String instrumentInfo) { |
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218 this.instrumentInfo = instrumentInfo; |
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219 } |
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220 |
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221 /** |
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222 * Removes this instrument (and any clones) from the probe to which it attached and renders the |
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223 * instrument inert. |
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224 * |
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225 * @throws IllegalStateException if this instrument has already been disposed |
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226 */ |
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227 public void dispose() throws IllegalStateException { |
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228 if (isDisposed) { |
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229 throw new IllegalStateException("Attempt to dispose an already disposed Instrumennt"); |
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230 } |
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231 if (probe != null) { |
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232 // It's attached |
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233 probe.disposeInstrument(this); |
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234 } |
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235 this.isDisposed = true; |
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236 } |
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237 |
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238 Probe getProbe() { |
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239 return probe; |
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240 } |
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241 |
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242 void setAttachedTo(Probe probe) { |
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243 this.probe = probe; |
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244 } |
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245 |
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246 /** |
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247 * Has this instrument been disposed and rendered unusable? |
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248 */ |
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249 boolean isDisposed() { |
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250 return isDisposed; |
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251 } |
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252 |
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253 abstract AbstractInstrumentNode addToChain(AbstractInstrumentNode nextNode); |
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254 |
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255 /** |
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256 * An instrument that propagates events to an instance of {@link InstrumentListener}. |
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257 */ |
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258 private static final class BasicInstrument extends Instrument { |
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259 |
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260 /** |
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261 * Tool-supplied listener for events. |
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262 */ |
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263 private final InstrumentListener instrumentListener; |
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264 |
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265 private BasicInstrument(InstrumentListener basicListener, String instrumentInfo) { |
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266 super(instrumentInfo); |
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267 this.instrumentListener = basicListener; |
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268 } |
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269 |
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270 @Override |
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271 AbstractInstrumentNode addToChain(AbstractInstrumentNode nextNode) { |
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272 return new BasicInstrumentNode(nextNode); |
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273 } |
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274 |
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275 @Override |
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276 AbstractInstrumentNode removeFromChain(AbstractInstrumentNode instrumentNode) { |
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277 boolean found = false; |
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278 if (instrumentNode != null) { |
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279 if (instrumentNode.getInstrument() == this) { |
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280 // Found the match at the head of the chain |
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281 return instrumentNode.nextInstrument; |
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282 } |
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283 // Match not at the head of the chain; remove it. |
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284 found = instrumentNode.removeFromChain(BasicInstrument.this); |
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285 } |
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286 if (!found) { |
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287 throw new IllegalStateException("Couldn't find instrument node to remove: " + this); |
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288 } |
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289 return instrumentNode; |
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290 } |
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291 |
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292 @NodeInfo(cost = NodeCost.NONE) |
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293 private final class BasicInstrumentNode extends AbstractInstrumentNode { |
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294 |
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295 private BasicInstrumentNode(AbstractInstrumentNode nextNode) { |
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296 super(nextNode); |
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297 } |
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298 |
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299 public void enter(Node node, VirtualFrame vFrame) { |
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300 BasicInstrument.this.instrumentListener.enter(BasicInstrument.this.probe); |
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301 if (nextInstrument != null) { |
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302 nextInstrument.enter(node, vFrame); |
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303 } |
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304 } |
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305 |
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306 public void returnVoid(Node node, VirtualFrame vFrame) { |
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307 BasicInstrument.this.instrumentListener.returnVoid(BasicInstrument.this.probe); |
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308 if (nextInstrument != null) { |
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309 nextInstrument.returnVoid(node, vFrame); |
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310 } |
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311 } |
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312 |
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313 public void returnValue(Node node, VirtualFrame vFrame, Object result) { |
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314 BasicInstrument.this.instrumentListener.returnValue(BasicInstrument.this.probe, result); |
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315 if (nextInstrument != null) { |
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316 nextInstrument.returnValue(node, vFrame, result); |
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317 } |
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318 } |
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319 |
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320 public void returnExceptional(Node node, VirtualFrame vFrame, Exception exception) { |
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321 BasicInstrument.this.instrumentListener.returnExceptional(BasicInstrument.this.probe, exception); |
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322 if (nextInstrument != null) { |
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323 nextInstrument.returnExceptional(node, vFrame, exception); |
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324 } |
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325 } |
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326 |
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327 public String instrumentationInfo() { |
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328 final String info = getInstrumentInfo(); |
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329 return info != null ? info : instrumentListener.getClass().getSimpleName(); |
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330 } |
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331 } |
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332 } |
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333 |
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334 /** |
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335 * Removes this instrument from an instrument chain. |
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336 */ |
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337 abstract AbstractInstrumentNode removeFromChain(AbstractInstrumentNode instrumentNode); |
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338 |
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339 /** |
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340 * An instrument that propagates events to an instance of {@link ASTInstrumentListener}. |
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341 */ |
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342 private static final class ASTInstrument extends Instrument { |
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343 |
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344 /** |
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345 * Tool-supplied listener for AST events. |
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346 */ |
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347 private final ASTInstrumentListener astListener; |
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348 |
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349 private ASTInstrument(ASTInstrumentListener astListener, String instrumentInfo) { |
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350 super(instrumentInfo); |
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351 this.astListener = astListener; |
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352 } |
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353 |
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354 @Override |
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355 AbstractInstrumentNode addToChain(AbstractInstrumentNode nextNode) { |
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356 return new ASTInstrumentNode(nextNode); |
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357 } |
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358 |
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359 @Override |
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360 AbstractInstrumentNode removeFromChain(AbstractInstrumentNode instrumentNode) { |
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361 boolean found = false; |
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362 if (instrumentNode != null) { |
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363 if (instrumentNode.getInstrument() == this) { |
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364 // Found the match at the head of the chain |
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365 return instrumentNode.nextInstrument; |
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366 } |
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367 // Match not at the head of the chain; remove it. |
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368 found = instrumentNode.removeFromChain(ASTInstrument.this); |
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369 } |
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370 if (!found) { |
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371 throw new IllegalStateException("Couldn't find instrument node to remove: " + this); |
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372 } |
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373 return instrumentNode; |
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374 } |
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375 |
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376 @NodeInfo(cost = NodeCost.NONE) |
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377 private final class ASTInstrumentNode extends AbstractInstrumentNode { |
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378 |
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379 private ASTInstrumentNode(AbstractInstrumentNode nextNode) { |
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380 super(nextNode); |
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381 } |
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382 |
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383 public void enter(Node node, VirtualFrame vFrame) { |
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384 ASTInstrument.this.astListener.enter(ASTInstrument.this.probe, node, vFrame); |
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385 if (nextInstrument != null) { |
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386 nextInstrument.enter(node, vFrame); |
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387 } |
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388 } |
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389 |
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390 public void returnVoid(Node node, VirtualFrame vFrame) { |
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391 ASTInstrument.this.astListener.returnVoid(ASTInstrument.this.probe, node, vFrame); |
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392 if (nextInstrument != null) { |
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393 nextInstrument.returnVoid(node, vFrame); |
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394 } |
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395 } |
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396 |
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397 public void returnValue(Node node, VirtualFrame vFrame, Object result) { |
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398 ASTInstrument.this.astListener.returnValue(ASTInstrument.this.probe, node, vFrame, result); |
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399 if (nextInstrument != null) { |
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400 nextInstrument.returnValue(node, vFrame, result); |
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401 } |
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402 } |
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403 |
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404 public void returnExceptional(Node node, VirtualFrame vFrame, Exception exception) { |
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405 ASTInstrument.this.astListener.returnExceptional(ASTInstrument.this.probe, node, vFrame, exception); |
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406 if (nextInstrument != null) { |
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407 nextInstrument.returnExceptional(node, vFrame, exception); |
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408 } |
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409 } |
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410 |
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411 public String instrumentationInfo() { |
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412 final String info = getInstrumentInfo(); |
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413 return info != null ? info : astListener.getClass().getSimpleName(); |
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414 } |
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415 } |
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416 |
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417 } |
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418 |
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419 public interface TruffleOptListener { |
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420 void notifyIsCompiled(boolean isCompiled); |
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421 } |
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422 |
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423 private static final class TruffleOptInstrument extends Instrument { |
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424 |
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425 private final TruffleOptListener toolOptListener; |
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426 |
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427 private TruffleOptInstrument(TruffleOptListener listener, String instrumentInfo) { |
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428 super(instrumentInfo); |
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429 this.toolOptListener = listener; |
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430 } |
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431 |
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432 @Override |
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433 AbstractInstrumentNode addToChain(AbstractInstrumentNode nextNode) { |
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434 return new TruffleOptInstrumentNode(nextNode); |
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435 } |
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436 |
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437 @Override |
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438 AbstractInstrumentNode removeFromChain(AbstractInstrumentNode instrumentNode) { |
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439 boolean found = false; |
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440 if (instrumentNode != null) { |
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441 if (instrumentNode.getInstrument() == this) { |
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442 // Found the match at the head of the chain |
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443 return instrumentNode.nextInstrument; |
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444 } |
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445 // Match not at the head of the chain; remove it. |
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446 found = instrumentNode.removeFromChain(TruffleOptInstrument.this); |
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447 } |
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448 if (!found) { |
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449 throw new IllegalStateException("Couldn't find instrument node to remove: " + this); |
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450 } |
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451 return instrumentNode; |
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452 } |
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453 |
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454 @NodeInfo(cost = NodeCost.NONE) |
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455 private final class TruffleOptInstrumentNode extends AbstractInstrumentNode { |
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456 |
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457 private boolean isCompiled; |
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458 |
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459 private TruffleOptInstrumentNode(AbstractInstrumentNode nextNode) { |
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460 super(nextNode); |
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461 this.isCompiled = CompilerDirectives.inCompiledCode(); |
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462 } |
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463 |
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464 public void enter(Node node, VirtualFrame vFrame) { |
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465 if (this.isCompiled != CompilerDirectives.inCompiledCode()) { |
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466 this.isCompiled = CompilerDirectives.inCompiledCode(); |
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467 TruffleOptInstrument.this.toolOptListener.notifyIsCompiled(this.isCompiled); |
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468 } |
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469 if (nextInstrument != null) { |
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470 nextInstrument.enter(node, vFrame); |
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471 } |
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472 } |
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473 |
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474 public void returnVoid(Node node, VirtualFrame vFrame) { |
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475 if (nextInstrument != null) { |
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476 nextInstrument.returnVoid(node, vFrame); |
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477 } |
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478 } |
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479 |
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480 public void returnValue(Node node, VirtualFrame vFrame, Object result) { |
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481 if (nextInstrument != null) { |
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482 nextInstrument.returnValue(node, vFrame, result); |
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483 } |
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484 } |
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485 |
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486 public void returnExceptional(Node node, VirtualFrame vFrame, Exception exception) { |
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487 if (nextInstrument != null) { |
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488 nextInstrument.returnExceptional(node, vFrame, exception); |
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489 } |
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490 } |
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491 |
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492 public String instrumentationInfo() { |
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493 final String info = getInstrumentInfo(); |
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494 return info != null ? info : toolOptListener.getClass().getSimpleName(); |
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495 } |
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496 } |
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497 |
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498 } |
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499 |
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500 @NodeInfo(cost = NodeCost.NONE) |
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501 abstract class AbstractInstrumentNode extends Node implements TruffleEvents, InstrumentationNode { |
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502 |
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503 @Child protected AbstractInstrumentNode nextInstrument; |
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504 |
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505 protected AbstractInstrumentNode(AbstractInstrumentNode nextNode) { |
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506 this.nextInstrument = nextNode; |
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507 } |
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508 |
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509 @Override |
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510 public boolean isInstrumentable() { |
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511 return false; |
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512 } |
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513 |
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514 /** |
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515 * Gets the instrument that created this node. |
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516 */ |
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517 private Instrument getInstrument() { |
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518 return Instrument.this; |
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519 } |
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520 |
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521 /** |
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522 * Removes the node from this chain that was added by a particular instrument, assuming that |
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523 * the head of the chain is not the one to be replaced. This is awkward, but is required |
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524 * because {@link Node#replace(Node)} won't take a {@code null} argument. This doesn't work |
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525 * for the tail of the list, which would be replacing itself with null. So the replacement |
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526 * must be directed the parent of the node being removed. |
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527 */ |
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528 private boolean removeFromChain(Instrument instrument) { |
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529 assert getInstrument() != instrument; |
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530 if (nextInstrument == null) { |
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531 return false; |
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532 } |
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533 if (nextInstrument.getInstrument() == instrument) { |
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534 // Next is the one to remove |
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535 if (nextInstrument.nextInstrument == null) { |
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536 // Next is at the tail; just forget |
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537 nextInstrument = null; |
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Truffle Instrumentation: major API revision, based around the Probe and Instrument classes; add Instrumentable API for language implementors, with most details automated; reimplemented to handle AST splitting automatically; more JUnit tests.
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538 } else { |
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539 // Replace next with its successor |
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Truffle Instrumentation: major API revision, based around the Probe and Instrument classes; add Instrumentable API for language implementors, with most details automated; reimplemented to handle AST splitting automatically; more JUnit tests.
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540 nextInstrument.replace(nextInstrument.nextInstrument); |
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541 } |
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542 return true; |
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543 } |
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544 return nextInstrument.removeFromChain(instrument); |
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545 } |
15450
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546 |
19645
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547 protected String getInstrumentInfo() { |
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548 return Instrument.this.instrumentInfo; |
18485
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549 } |
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550 |
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551 } |
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552 |
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Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
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553 } |