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author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Thu, 14 Jan 2016 14:20:57 +0100
parents 0d36601f233e
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1 /*
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2 * Copyright (c) 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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26
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27 import java.io.PrintStream;
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28 import java.util.ArrayList;
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29 import java.util.Comparator;
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30 import java.util.HashMap;
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31 import java.util.List;
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32 import java.util.Map;
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33 import java.util.Map.Entry;
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34 import java.util.TreeSet;
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35
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36 import com.oracle.truffle.api.instrument.Instrumenter;
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37 import com.oracle.truffle.api.instrument.Probe;
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38 import com.oracle.truffle.api.instrument.ProbeInstrument;
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39 import com.oracle.truffle.api.instrument.ProbeListener;
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40 import com.oracle.truffle.api.instrument.SimpleInstrumentListener;
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41 import com.oracle.truffle.api.instrument.StandardSyntaxTag;
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42 import com.oracle.truffle.api.instrument.SyntaxTag;
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43 import com.oracle.truffle.api.instrument.impl.DefaultProbeListener;
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44 import com.oracle.truffle.api.instrument.impl.DefaultSimpleInstrumentListener;
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45 import com.oracle.truffle.api.nodes.Node;
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46 import com.oracle.truffle.api.source.LineLocation;
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47 import com.oracle.truffle.api.source.Source;
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48 import com.oracle.truffle.api.source.SourceSection;
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49
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50 /**
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51 * An {@linkplain Instrumenter.Tool Instrumentation Tool} that counts interpreter
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52 * <em>execution calls</em> to AST nodes that hold a specified {@linkplain SyntaxTag syntax tag},
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53 * tabulated by source and line number associated with each node. Syntax tags are presumed to be
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54 * applied external to the tool. If no tag is specified, {@linkplain StandardSyntaxTag#STATEMENT
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55 * STATEMENT} is used, corresponding to conventional behavior for code coverage tools.
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56 * <p>
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57 * <b>Tool Life Cycle</b>
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58 * <p>
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59 * See {@linkplain Instrumenter.Tool Instrumentation Tool} for the life cycle common to all such
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60 * tools.
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61 * <p>
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62 * <b>Execution Counts</b>
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63 * <p>
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64 * <ul>
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65 * <li>"Execution call" on a node is is defined as invocation of a node method that is instrumented
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66 * to produce the event {@link SimpleInstrumentListener#onEnter(Probe)};</li>
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67 * <li>Execution calls are tabulated only at nodes where the guest languages supports
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68 * {@linkplain Instrumenter#probe(Node) probing}.</li>
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69 * <li>Execution calls are tabulated only at nodes present in the AST when originally created;
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70 * dynamically added nodes will not be instrumented.</li>
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71 * </ul>
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72 * </p>
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73 * <b>Results</b>
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74 * <p>
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75 * A modification-safe copy of the {@linkplain #getCounts() counts} can be retrieved at any time,
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76 * without effect on the state of the tool.
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77 * </p>
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78 * <p>
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79 * A "default" {@linkplain #print(PrintStream) print()} method can summarizes the current counts at
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80 * any time in a simple textual format, with no other effect on the state of the tool.
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81 * </p>
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82 *
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83 * @see ProbeInstrument
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84 * @see SyntaxTag
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85 */
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86 public final class CoverageTracker extends Instrumenter.Tool {
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88 /** Counting data. */
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89 private final Map<LineLocation, CoverageRecord> coverageMap = new HashMap<>();
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90
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91 /** Needed for disposal. */
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92 private final List<ProbeInstrument> instruments = new ArrayList<>();
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93
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94 /**
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95 * Coverage counting is restricted to nodes holding this tag.
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96 */
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97 private final SyntaxTag countingTag;
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98
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99 private final ProbeListener probeListener;
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100
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101 /**
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102 * Create a per-line coverage tool for nodes tagged as {@linkplain StandardSyntaxTag#STATEMENT
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103 * statements} in subsequently created ASTs.
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104 */
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105 public CoverageTracker() {
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106 this(StandardSyntaxTag.STATEMENT);
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107 }
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108
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109 /**
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110 * Create a per-line coverage tool for nodes tagged as specified, presuming that tags applied
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111 * outside this tool.
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112 */
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113 public CoverageTracker(SyntaxTag tag) {
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114 this.probeListener = new CoverageProbeListener();
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115 this.countingTag = tag;
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116 }
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117
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118 @Override
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119 protected boolean internalInstall() {
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120 final Instrumenter instrumenter = getInstrumenter();
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121 for (Probe probe : instrumenter.findProbesTaggedAs(countingTag)) {
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122 addCoverageCounter(probe);
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123 }
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124 instrumenter.addProbeListener(probeListener);
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125 return true;
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126 }
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127
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128 @Override
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129 protected void internalReset() {
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130 coverageMap.clear();
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131 }
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132
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133 @Override
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134 protected void internalDispose() {
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135 getInstrumenter().removeProbeListener(probeListener);
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136 for (ProbeInstrument instrument : instruments) {
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137 instrument.dispose();
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138 }
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139 }
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140
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141 /**
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142 * Gets a modification-safe summary of the current per-type node execution counts; does not
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143 * affect the counts.
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144 * <p>
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145 * The map holds an array for each source, and elements of the a array corresponding to the
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146 * textual lines of that source. An array entry contains null if the corresponding line of
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147 * source is associated with no nodes of the relevant type, i.e. where no count was made. A
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148 * numeric entry represents the execution count at the corresponding line of source.
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149 * <p>
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150 * <b>Note:</b> source line numbers are 1-based, so array index {@code i} corresponds to source
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151 * line number {@code i + 1}
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152 */
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153 public Map<Source, Long[]> getCounts() {
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154
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155 /**
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156 * Counters for every {Source, line number} for which a counter was installed, i.e. for
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157 * every line associated with an appropriately tagged AST node; iterable in order of source
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158 * name, then line number.
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159 */
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160 final TreeSet<Entry<LineLocation, CoverageRecord>> entries = new TreeSet<>(new LineLocationEntryComparator());
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161
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162 for (Entry<LineLocation, CoverageRecord> entry : coverageMap.entrySet()) {
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163 entries.add(entry);
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164 }
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165 final Map<Source, Long[]> result = new HashMap<>();
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166 Source curSource = null;
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167 Long[] curLineTable = null;
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168 for (Entry<LineLocation, CoverageRecord> entry : entries) {
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169 final LineLocation key = entry.getKey();
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170 final Source source = key.getSource();
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171 final int lineNo = key.getLineNumber();
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172 if (source != curSource) {
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173 if (curSource != null) {
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174 result.put(curSource, curLineTable);
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175 }
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176 curSource = source;
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177 curLineTable = new Long[source.getLineCount()];
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178 }
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179 curLineTable[lineNo - 1] = entry.getValue().count;
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180 }
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181 if (curSource != null) {
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182 result.put(curSource, curLineTable);
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183 }
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184 return result;
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185 }
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186
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187 /**
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188 * A default printer for the current line counts, producing lines of the form " (<count>) <line
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189 * number> : <text of line>", grouped by source.
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190 */
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191 public void print(PrintStream out) {
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192 out.println();
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193 out.println(countingTag.name() + " coverage:");
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194
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195 /**
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196 * Counters for every {Source, line number} for which a counter was installed, i.e. for
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197 * every line associated with an appropriately tagged AST node; iterable in order of source
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198 * name, then line number.
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199 */
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200 final TreeSet<Entry<LineLocation, CoverageRecord>> entries = new TreeSet<>(new LineLocationEntryComparator());
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201
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202 for (Entry<LineLocation, CoverageRecord> entry : coverageMap.entrySet()) {
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203 entries.add(entry);
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204 }
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205 Source curSource = null;
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206 int curLineNo = 1;
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207 for (Entry<LineLocation, CoverageRecord> entry : entries) {
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208 final LineLocation key = entry.getKey();
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209 final Source source = key.getSource();
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210 final int lineNo = key.getLineNumber();
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211 if (source != curSource) {
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212 if (curSource != null) {
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213 while (curLineNo <= curSource.getLineCount()) {
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214 displayLine(out, null, curSource, curLineNo++);
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215 }
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216 }
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217 curSource = source;
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218 curLineNo = 1;
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219 out.println();
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220 out.println(source.getPath());
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221 }
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diff changeset
222 while (curLineNo < lineNo) {
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223 displayLine(out, null, curSource, curLineNo++);
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224 }
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225 displayLine(out, entry.getValue(), curSource, curLineNo++);
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226 }
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227 if (curSource != null) {
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228 while (curLineNo <= curSource.getLineCount()) {
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229 displayLine(out, null, curSource, curLineNo++);
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230 }
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231 }
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232 }
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233
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234 private static void displayLine(PrintStream out, CoverageRecord record, Source source, int lineNo) {
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235 if (record == null) {
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236 out.format("%14s", " ");
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237 } else {
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238 out.format("(%12d)", record.count);
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239 }
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240 out.format(" %3d: ", lineNo);
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241 out.println(source.getCode(lineNo));
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242 }
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243
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244 /**
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245 * A listener for events at each instrumented AST location. This listener counts
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246 * "execution calls" to the instrumented node.
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247 */
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73b1844b5b14 Truffle/Instrumentation: rename InstrumentListener to SimpleInstrumentListener
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248 private final class CoverageRecord extends DefaultSimpleInstrumentListener {
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249
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250 private final SourceSection srcSection; // The text of the code being counted
22255
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251 private ProbeInstrument instrument; // The attached Instrument, in case need to remove.
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252 private long count = 0;
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253
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254 CoverageRecord(SourceSection srcSection) {
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255 this.srcSection = srcSection;
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256 }
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257
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258 @Override
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diff changeset
259 public void onEnter(Probe probe) {
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260 if (isEnabled()) {
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diff changeset
261 count++;
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262 }
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263 }
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diff changeset
264
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265 }
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266
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diff changeset
267 private static final class LineLocationEntryComparator implements Comparator<Entry<LineLocation, CoverageRecord>> {
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268
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diff changeset
269 public int compare(Entry<LineLocation, CoverageRecord> e1, Entry<LineLocation, CoverageRecord> e2) {
21987
b2d1c8ff592a 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.
Jaroslav Tulach <jaroslav.tulach@oracle.com>
parents: 21951
diff changeset
270 return e1.getKey().compareTo(e2.getKey());
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271 }
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272 }
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273
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274 /**
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275 * Attach a counting instrument to each node that is assigned a specified tag.
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276 */
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277 private class CoverageProbeListener extends DefaultProbeListener {
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278
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diff changeset
279 @Override
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280 public void probeTaggedAs(Probe probe, SyntaxTag tag, Object tagValue) {
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diff changeset
281 if (countingTag == tag) {
22221
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diff changeset
282 addCoverageCounter(probe);
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283 }
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parents:
diff changeset
284 }
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parents:
diff changeset
285 }
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diff changeset
286
22221
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diff changeset
287 private void addCoverageCounter(Probe probe) {
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
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diff changeset
288 final SourceSection srcSection = probe.getProbedSourceSection();
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
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diff changeset
289 if (srcSection == null) {
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
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diff changeset
290 // TODO (mlvdv) report this?
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diff changeset
291 return;
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
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diff changeset
292 }
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parents: 22220
diff changeset
293 // Get the source line where the
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
294 final LineLocation lineLocation = srcSection.getLineLocation();
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
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parents: 22220
diff changeset
295 CoverageRecord record = coverageMap.get(lineLocation);
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
296 if (record != null) {
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
297 // Another node starts on same line; count only the first (textually)
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
298 if (srcSection.getCharIndex() > record.srcSection.getCharIndex()) {
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
299 // Existing record, corresponds to code earlier on line
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
300 return;
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
301 } else {
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
302 // Existing record, corresponds to code at a later position; replace it
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
303 record.instrument.dispose();
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
304 }
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
305 }
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
306
22225
a0fa69e3e60e Truffle/Instrumentation: remove static Instrument factory methods, now supported by Instrumenter
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22221
diff changeset
307 final CoverageRecord coverageRecord = new CoverageRecord(srcSection);
22255
e7643754d982 Truffle/Instrumentation: rename Instrument to ProbeInstrument to distinguish from another kind to be added.
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22247
diff changeset
308 final ProbeInstrument instrument = getInstrumenter().attach(probe, coverageRecord, CoverageTracker.class.getSimpleName());
22225
a0fa69e3e60e Truffle/Instrumentation: remove static Instrument factory methods, now supported by Instrumenter
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22221
diff changeset
309 coverageRecord.instrument = instrument;
22221
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Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
310 instruments.add(instrument);
22225
a0fa69e3e60e Truffle/Instrumentation: remove static Instrument factory methods, now supported by Instrumenter
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22221
diff changeset
311 coverageMap.put(lineLocation, coverageRecord);
22221
c92d6117696f Truffle/Instrumentation: modify behavior of CoverageTracker and LineToProbesMap so that they will work on ASTs created before installation (as long as correct probes are in place)
Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 22220
diff changeset
312 }
18987
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parents:
diff changeset
313 }