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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/instrument/impl/LineToProbesMap.java @ 18485:e3c95cbbb50c

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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.
author Michael Van De Vanter <michael.van.de.vanter@oracle.com>
date Sun, 23 Nov 2014 16:07:23 -0800
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18485
e3c95cbbb50c 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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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
e3c95cbbb50c 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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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.impl;
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26
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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.Probe.ProbeListener;
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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 * A mapping from {@link LineLocation} (a line number in a specific piece of {@link Source} code) to
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36 * a collection of {@link Probe}s whose associated {@link SourceSection} starts on that line.
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37 */
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38 public class LineToProbesMap implements ProbeListener {
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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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42
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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 public LineToProbesMap() {
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53 }
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54
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55 public void startASTProbing(Source source) {
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56 }
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57
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58 public void newProbeInserted(Probe probe) {
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59 final SourceSection sourceSection = probe.getProbedSourceSection();
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60 if (sourceSection != null && !(sourceSection instanceof NullSourceSection)) {
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61 final LineLocation lineLocation = sourceSection.getLineLocation();
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62 if (TRACE) {
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63 trace("ADD " + lineLocation.getShortDescription() + " ==> " + probe.getShortDescription());
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64 }
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65 this.addProbeToLine(lineLocation, probe);
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66 }
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67 }
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68
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69 public void probeTaggedAs(Probe probe, SyntaxTag tag, Object tagValue) {
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70 // This map ignores tags
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71 }
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72
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73 public void endASTProbing(Source source) {
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74 }
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75
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76 /**
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77 * Returns the {@link Probe}, if any, associated with source that starts on a specified line; if
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78 * there are more than one, return the one with the first starting character location.
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79 */
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80 public Probe findLineProbe(LineLocation lineLocation) {
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81 Probe probe = null;
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82 final Collection<Probe> probes = getProbesAtLine(lineLocation);
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83 for (Probe probesOnLine : probes) {
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84 if (probe == null) {
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85 probe = probesOnLine;
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86 } else if (probesOnLine.getProbedSourceSection().getCharIndex() < probe.getProbedSourceSection().getCharIndex()) {
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87 probe = probesOnLine;
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88 }
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89 }
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90 return probe;
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91 }
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92
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93 /**
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94 * Records creation of a probe whose associated source starts on the given line.
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95 * <p>
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96 * If the line already exists in the internal {@link #lineToProbesMap}, this probe will be added
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97 * to the existing collection. If no line already exists in the internal map, then a new key is
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98 * added along with a new collection containing the probe.
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99 * <p>
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100 * This class requires that each added line/probe pair hasn't been previously added. However,
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101 * attaching the same probe to a new line location is allowed.
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102 *
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103 * @param line The {@link LineLocation} to attach the probe to.
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104 * @param probe The {@link Probe} to attach for that line location.
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105 */
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106 protected void addProbeToLine(LineLocation line, Probe probe) {
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107
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108 if (!lineToProbesMap.containsKey(line)) {
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109 // Key does not exist, add new probe list
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110 final ArrayList<Probe> newProbeList = new ArrayList<>(2);
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111 newProbeList.add(probe);
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112 lineToProbesMap.put(line, newProbeList);
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113 } else {
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114 // Probe list exists, add to existing
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115 final Collection<Probe> existingProbeList = lineToProbesMap.get(line);
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116 assert !existingProbeList.contains(probe);
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117 existingProbeList.add(probe);
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118 }
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119 }
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120
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121 /**
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122 *
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123 * Returns a collection of {@link Probe}s whose associated source begins at the given
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124 * {@link LineLocation}, an empty list if none.
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125 *
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126 * @param line The line to check.
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127 * @return A collection of probes at the given line.
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128 */
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129 public Collection<Probe> getProbesAtLine(LineLocation line) {
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130 Collection<Probe> probesList = lineToProbesMap.get(line);
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131
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132 if (probesList == null) {
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133 return Collections.emptyList();
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134 }
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135 return probesList;
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136 }
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137
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138 /**
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139 * Convenience method to get probes according to a int line number. Returns a collection of
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140 * {@link Probe}s at the given line number, an empty list if none.
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141 *
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142 * @param lineNumber The line number to check.
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143 * @return A collection of probes at the given line.
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144 */
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145 public Collection<Probe> getProbesAtLineNumber(int lineNumber) {
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146
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147 final Set<LineLocation> keySet = lineToProbesMap.keySet();
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148 if (keySet.size() == 0) {
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149 return Collections.emptyList();
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150 }
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151
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152 ArrayList<Probe> probes = new ArrayList<>();
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153 for (LineLocation line : keySet) {
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154 if (line.getLineNumber() == lineNumber) {
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155 probes.addAll(lineToProbesMap.get(line));
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156 }
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157 }
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158
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159 return probes;
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160 }
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161
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162 public void forget(Source source) {
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163 final Set<LineLocation> mappedLines = lineToProbesMap.keySet();
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164 if (mappedLines.size() > 0) {
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165 List<LineLocation> forgetLines = new ArrayList<>();
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166 for (LineLocation line : mappedLines) {
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167 if (line.getSource().equals(source)) {
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168 forgetLines.add(line);
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169 }
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170 }
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171 for (LineLocation line : forgetLines) {
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172 lineToProbesMap.remove(line);
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173 }
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174 }
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175 }
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176 }