Mercurial > hg > truffle
annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/instrument/Probe.java @ 18338:c4f374adce13
Probe interface should extend NodeInterface
author | Andreas Woess <andreas.woess@jku.at> |
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date | Tue, 11 Nov 2014 14:24:21 +0100 |
parents | 7bfbad29d331 |
children | e3c95cbbb50c |
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) 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package com.oracle.truffle.api.instrument; |
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26 |
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27 import com.oracle.truffle.api.nodes.*; |
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28 import com.oracle.truffle.api.source.*; |
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29 |
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30 /** |
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31 * A collector of {@link ExecutionEvents} at a specific site (node) in a Truffle AST (generated by a |
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32 * {@link Wrapper} inserted into the AST) for the purpose of <em>instrumentation</em>. For probes |
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33 * associated with programmer-facing tools, there should be no more than one probe associated with a |
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34 * particular piece of source code syntax (i.e. a {@link SourceSection}). |
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35 * <p> |
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36 * Any {@linkplain SyntaxTag tags} associated with a particular piece of source code syntax are |
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37 * managed by the probe. |
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38 * <p> |
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39 * When ASTs are copied, it is presumed that the probe for a site is shared by all AST nodes |
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40 * representing that site. |
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41 * <p> |
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42 * A probe holds zero or more {@link Instrument}s, which can be added and removed dynamically. |
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43 * Events reported to a probe are propagated to every attached instrument; the order is undefined. |
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44 * <p> |
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45 * Probe methods must be amenable to Truffle/Graal inlining on the assumption that the collection of |
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46 * attached instruments seldom changes. The assumption is invalidated when instruments are added or |
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47 * removed, but some instruments may change their internal state in such a way that the assumption |
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48 * should also be invalidated. |
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49 * |
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50 * @see Instrument |
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51 * @see Wrapper |
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52 */ |
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53 public interface Probe extends ExecutionEvents, SyntaxTagged, NodeInterface { |
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54 |
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55 /** |
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56 * Get the {@link SourceSection} in some Truffle AST associated with this probe. |
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57 * |
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58 * @return The source associated with this probe. |
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59 */ |
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60 SourceSection getSourceLocation(); |
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61 |
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62 /** |
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63 * Mark this probe as belonging to some tool-related category that can be used to guide tool |
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64 * behavior at an associated AST node. For example, a debugger might add the tag |
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65 * {@link StandardSyntaxTag#STATEMENT} as a way of configuring where execution should stop when |
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66 * stepping. |
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67 */ |
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68 void tagAs(SyntaxTag tag); |
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69 |
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70 /** |
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71 * Adds an {@link Instrument} to this probe's collection. No check is made to see if the same |
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72 * instrument has already been added. |
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73 * |
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74 * @param newInstrument The instrument to add to this probe. |
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75 */ |
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76 void addInstrument(Instrument newInstrument); |
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77 |
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78 /** |
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79 * Removes the given instrument from the probe's collection. |
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80 * |
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81 * @param oldInstrument The instrument to remove from this probe. |
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82 * @throws RuntimeException if no matching instrument has been attached. |
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83 */ |
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84 void removeInstrument(Instrument oldInstrument) throws RuntimeException; |
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85 |
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86 } |