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annotate truffle/com.oracle.truffle.tools/src/com/oracle/truffle/tools/LineToProbesMap.java @ 21987:b2d1c8ff592a

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Less classes in the source API package. Merging interfaces and their only implementation into final classes. Hiding NullSourceSection behind factory method. Using JDK's standard CharsetDecoder instead of proprietary BytesDecoder.
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 01 Jul 2015 10:23:36 +0200
parents 9c8c0937da41
children dc83cc1f94f2 3aad794eec0e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2014, 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.tools;
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27 import java.io.*;
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28 import java.util.*;
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29
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30 import com.oracle.truffle.api.instrument.*;
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31 import com.oracle.truffle.api.instrument.impl.*;
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32 import com.oracle.truffle.api.source.*;
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33
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34 /**
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35 * An {@link InstrumentationTool} that builds a map of every {@link Probe} attached to some AST,
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36 * indexed by {@link Source} and line number.
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37 */
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38 public final class LineToProbesMap extends InstrumentationTool {
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39
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40 private static final boolean TRACE = false;
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41 private static final PrintStream OUT = System.out;
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43 private static void trace(String msg) {
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44 OUT.println("LineToProbesMap: " + msg);
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45 }
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46
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47 /**
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48 * Map: Source line ==> probes associated with source sections starting on the line.
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49 */
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50 private final Map<LineLocation, Collection<Probe>> lineToProbesMap = new HashMap<>();
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51
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52 private final ProbeListener probeListener;
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53
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54 /**
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55 * Create a map of {@link Probe}s that collects information on all probes added to subsequently
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56 * created ASTs (once installed).
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57 */
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58 public LineToProbesMap() {
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59 this.probeListener = new LineToProbesListener();
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60 }
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61
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62 @Override
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63 protected boolean internalInstall() {
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64 Probe.addProbeListener(probeListener);
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65 return true;
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66 }
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67
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68 @Override
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69 protected void internalReset() {
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70 lineToProbesMap.clear();
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71 }
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72
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73 @Override
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74 protected void internalDispose() {
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75 Probe.removeProbeListener(probeListener);
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76 }
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77
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78 /**
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79 * Returns the {@link Probe}, if any, associated with a specific line of guest language code; if
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80 * more than one, return the one with the first starting character location.
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81 */
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82 public Probe findFirstProbe(LineLocation lineLocation) {
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83 Probe probe = null;
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84 final Collection<Probe> probes = findProbes(lineLocation);
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85 for (Probe probesOnLine : probes) {
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86 if (probe == null) {
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87 probe = probesOnLine;
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88 } else if (probesOnLine.getProbedSourceSection().getCharIndex() < probe.getProbedSourceSection().getCharIndex()) {
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89 probe = probesOnLine;
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90 }
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91 }
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92 return probe;
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93 }
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94
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95 /**
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96 * Returns all {@link Probe}s whose associated source begins at the given {@link LineLocation},
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97 * an empty list if none.
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98 */
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99 public Collection<Probe> findProbes(LineLocation line) {
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100 final Collection<Probe> probes = lineToProbesMap.get(line);
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101 if (probes == null) {
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102 return Collections.emptyList();
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103 }
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104 return Collections.unmodifiableCollection(probes);
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105 }
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106
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107 private class LineToProbesListener extends DefaultProbeListener {
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108
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109 @Override
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110 public void newProbeInserted(Probe probe) {
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111 final SourceSection sourceSection = probe.getProbedSourceSection();
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112 if (sourceSection != null && sourceSection.getSource() != null) {
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113 final LineLocation lineLocation = sourceSection.getLineLocation();
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114 if (TRACE) {
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115 trace("ADD " + lineLocation.getShortDescription() + " ==> " + probe.getShortDescription());
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116 }
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117 Collection<Probe> probes = lineToProbesMap.get(lineLocation);
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118 if (probes == null) {
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119 probes = new ArrayList<>(2);
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120 lineToProbesMap.put(lineLocation, probes);
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121 } else {
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122 assert !probes.contains(probe);
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123 }
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124 probes.add(probe);
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125 }
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126 }
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127 }
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128 }