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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/instrument/Probe.java @ 16391:50d79ad439f1

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Truffle/Instrumentation: rename PhylumTag to SyntaxTag (along with related classes/methods)
author Michael Van De Vanter <michael.van.de.vanter@oracle.com>
date Wed, 02 Jul 2014 16:06:42 -0700
parents 915ebb306fcc
children 7833417c8172
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0c6d8a08e31b 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
0c6d8a08e31b Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
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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
0c6d8a08e31b Truffle: Major cleanup and extension of the Truffle Instrumentation framework in com.oracle.truffle.api
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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
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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.source.*;
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28
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29 /**
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30 * A collector of {@link ExecutionEvents} at a specific site (node) in a Truffle AST (generated by a
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31 * {@link Wrapper} inserted into the AST) for the purpose of <em>instrumentation</em>. For probes
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32 * associated with programmer-facing tools, there should be no more than one probe associated with a
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33 * particular piece of source code syntax (i.e. a {@link SourceSection}).
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34 * <p>
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35 * Any {@linkplain SyntaxTag tags} associated with a particular piece of source code syntax are
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36 * managed by the probe.
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37 * <p>
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38 * When ASTs are copied, it is presumed that the probe for a site is shared by all AST nodes
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39 * representing that site.
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40 * <p>
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41 * A probe holds zero or more {@link Instrument}s, which can be added and removed dynamically.
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42 * Events reported to a probe are propagated to every attached instrument; the order is undefined.
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43 * <p>
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44 * Probe methods must be amenable to Truffle/Graal inlining on the assumption that the collection of
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45 * attached instruments seldom changes. The assumption is invalidated when instruments are added or
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46 * removed, but some instruments may change their internal state in such a way that the assumption
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47 * should also be invalidated.
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48 * <p>
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49 * <strong>Disclaimer:</strong> experimental interface under development. In particular, the
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50 * <em>notify</em> methods must be migrated to another interface.
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51 *
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52 * @see Instrument
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53 * @see Wrapper
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54 */
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55 public interface Probe extends ExecutionEvents, SyntaxTagged {
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56
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57 /**
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58 * The source location with which this probe is (presumably uniquely) associated.
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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 being associated with an AST node in some category useful for debugging
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64 * and other tools.
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65 */
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66 void tagAs(SyntaxTag tag);
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67
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68 /**
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69 * Adds an instrument to this probe.
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70 */
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71 void addInstrument(Instrument newInstrument);
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72
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73 /**
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74 * Removes an instrument from this probe.
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75 */
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76 void removeInstrument(Instrument oldInstrument);
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77
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78 }