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annotate truffle/com.oracle.truffle.tools/src/com/oracle/truffle/tools/CoverageTracker.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents 0f0e34039769
children 1c0f490984d5
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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 com.oracle.truffle.api.instrument.Instrument;
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28 import com.oracle.truffle.api.instrument.InstrumentationTool;
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29 import com.oracle.truffle.api.instrument.Probe;
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30 import com.oracle.truffle.api.instrument.ProbeListener;
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31 import com.oracle.truffle.api.instrument.SimpleInstrumentListener;
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32 import com.oracle.truffle.api.instrument.StandardSyntaxTag;
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33 import com.oracle.truffle.api.instrument.SyntaxTag;
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34 import com.oracle.truffle.api.instrument.impl.DefaultProbeListener;
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35 import com.oracle.truffle.api.instrument.impl.DefaultSimpleInstrumentListener;
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36 import com.oracle.truffle.api.nodes.Node;
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37 import com.oracle.truffle.api.source.LineLocation;
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38 import com.oracle.truffle.api.source.Source;
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39 import com.oracle.truffle.api.source.SourceSection;
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40 import java.io.PrintStream;
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41 import java.util.ArrayList;
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42 import java.util.Comparator;
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43 import java.util.HashMap;
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44 import java.util.List;
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45 import java.util.Map;
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46 import java.util.Map.Entry;
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47 import java.util.TreeSet;
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48
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49 /**
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50 * An {@link InstrumentationTool} that counts interpreter <em>execution calls</em> to AST nodes that
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51 * hold a specified {@linkplain SyntaxTag syntax tag}, tabulated by source and line number
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52 * associated with each node. Syntax tags are presumed to be applied external to the tool. If no tag
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53 * is specified, {@linkplain StandardSyntaxTag#STATEMENT STATEMENT} is used, corresponding to
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54 * conventional behavior for code coverage tools.
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55 * <p>
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56 * <b>Tool Life Cycle</b>
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57 * <p>
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58 * See {@link InstrumentationTool} for the life cycle common to all such tools.
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59 * <p>
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60 * <b>Execution Counts</b>
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61 * <p>
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62 * <ul>
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63 * <li>"Execution call" on a node is is defined as invocation of a node method that is instrumented
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64 * to produce the event {@link SimpleInstrumentListener#enter(Probe)};</li>
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65 * <li>Execution calls are tabulated only at <em>instrumented</em> nodes, i.e. those for which
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66 * {@linkplain Node#isInstrumentable() isInstrumentable() == true};</li>
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67 * <li>Execution calls are tabulated only at nodes present in the AST when originally created;
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68 * dynamically added nodes will not be instrumented.</li>
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69 * </ul>
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70 * </p>
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71 * <b>Results</b>
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72 * <p>
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73 * A modification-safe copy of the {@linkplain #getCounts() counts} can be retrieved at any time,
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74 * without effect on the state of the tool.
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75 * </p>
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76 * <p>
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77 * A "default" {@linkplain #print(PrintStream) print()} method can summarizes the current counts at
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78 * any time in a simple textual format, with no other effect on the state of the tool.
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79 * </p>
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80 *
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81 * @see Instrument
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82 * @see SyntaxTag
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83 */
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84 public final class CoverageTracker extends InstrumentationTool {
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85
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86 /** Counting data. */
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87 private final Map<LineLocation, CoverageRecord> coverageMap = new HashMap<>();
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88
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89 /** Needed for disposal. */
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90 private final List<Instrument> instruments = new ArrayList<>();
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91
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92 /**
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93 * Coverage counting is restricted to nodes holding this tag.
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94 */
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95 private final SyntaxTag countingTag;
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96
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97 private final ProbeListener probeListener;
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98
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99 /**
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100 * Create a per-line coverage tool for nodes tagged as {@linkplain StandardSyntaxTag#STATEMENT
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101 * statements} in subsequently created ASTs.
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102 */
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103 public CoverageTracker() {
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104 this(StandardSyntaxTag.STATEMENT);
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105 }
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106
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107 /**
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108 * Create a per-line coverage tool for nodes tagged as specified, presuming that tags applied
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109 * outside this tool.
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110 */
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111 public CoverageTracker(SyntaxTag tag) {
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112 this.probeListener = new CoverageProbeListener();
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113 this.countingTag = tag;
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114 }
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115
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116 @Override
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117 protected boolean internalInstall() {
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118 Probe.addProbeListener(probeListener);
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119 return true;
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120 }
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121
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122 @Override
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123 protected void internalReset() {
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124 coverageMap.clear();
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125 }
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126
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127 @Override
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128 protected void internalDispose() {
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129 Probe.removeProbeListener(probeListener);
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130 for (Instrument instrument : instruments) {
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131 instrument.dispose();
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132 }
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133 }
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134
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135 /**
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136 * Gets a modification-safe summary of the current per-type node execution counts; does not
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137 * affect the counts.
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138 * <p>
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139 * The map holds an array for each source, and elements of the a array corresponding to the
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140 * textual lines of that source. An array entry contains null if the corresponding line of
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141 * source is associated with no nodes of the relevant type, i.e. where no count was made. A
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142 * numeric entry represents the execution count at the corresponding line of source.
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143 * <p>
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144 * <b>Note:</b> source line numbers are 1-based, so array index {@code i} corresponds to source
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145 * line number {@code i + 1}
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146 */
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147 public Map<Source, Long[]> getCounts() {
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148
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149 /**
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150 * Counters for every {Source, line number} for which a counter was installed, i.e. for
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151 * every line associated with an appropriately tagged AST node; iterable in order of source
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152 * name, then line number.
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153 */
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154 final TreeSet<Entry<LineLocation, CoverageRecord>> entries = new TreeSet<>(new LineLocationEntryComparator());
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155
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156 for (Entry<LineLocation, CoverageRecord> entry : coverageMap.entrySet()) {
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157 entries.add(entry);
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158 }
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159 final Map<Source, Long[]> result = new HashMap<>();
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160 Source curSource = null;
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161 Long[] curLineTable = null;
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162 for (Entry<LineLocation, CoverageRecord> entry : entries) {
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163 final LineLocation key = entry.getKey();
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164 final Source source = key.getSource();
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165 final int lineNo = key.getLineNumber();
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166 if (source != curSource) {
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167 if (curSource != null) {
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168 result.put(curSource, curLineTable);
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169 }
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170 curSource = source;
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171 curLineTable = new Long[source.getLineCount()];
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172 }
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173 curLineTable[lineNo - 1] = entry.getValue().count;
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174 }
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175 if (curSource != null) {
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176 result.put(curSource, curLineTable);
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177 }
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178 return result;
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179 }
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180
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181 /**
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182 * A default printer for the current line counts, producing lines of the form " (<count>) <line
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183 * number> : <text of line>", grouped by source.
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184 */
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185 public void print(PrintStream out) {
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186 out.println();
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187 out.println(countingTag.name() + " coverage:");
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188
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189 /**
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190 * Counters for every {Source, line number} for which a counter was installed, i.e. for
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191 * every line associated with an appropriately tagged AST node; iterable in order of source
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192 * name, then line number.
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193 */
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194 final TreeSet<Entry<LineLocation, CoverageRecord>> entries = new TreeSet<>(new LineLocationEntryComparator());
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195
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196 for (Entry<LineLocation, CoverageRecord> entry : coverageMap.entrySet()) {
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197 entries.add(entry);
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198 }
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199 Source curSource = null;
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200 int curLineNo = 1;
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201 for (Entry<LineLocation, CoverageRecord> entry : entries) {
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202 final LineLocation key = entry.getKey();
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203 final Source source = key.getSource();
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204 final int lineNo = key.getLineNumber();
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205 if (source != curSource) {
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206 if (curSource != null) {
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207 while (curLineNo <= curSource.getLineCount()) {
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208 displayLine(out, null, curSource, curLineNo++);
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209 }
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210 }
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211 curSource = source;
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212 curLineNo = 1;
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213 out.println();
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214 out.println(source.getPath());
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215 }
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216 while (curLineNo < lineNo) {
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217 displayLine(out, null, curSource, curLineNo++);
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218 }
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219 displayLine(out, entry.getValue(), curSource, curLineNo++);
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220 }
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221 if (curSource != null) {
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222 while (curLineNo <= curSource.getLineCount()) {
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223 displayLine(out, null, curSource, curLineNo++);
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224 }
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225 }
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226 }
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227
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228 private static void displayLine(PrintStream out, CoverageRecord record, Source source, int lineNo) {
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229 if (record == null) {
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230 out.format("%14s", " ");
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231 } else {
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232 out.format("(%12d)", record.count);
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233 }
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234 out.format(" %3d: ", lineNo);
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235 out.println(source.getCode(lineNo));
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236 }
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237
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238 /**
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239 * A listener for events at each instrumented AST location. This listener counts
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240 * "execution calls" to the instrumented node.
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241 */
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73b1844b5b14 Truffle/Instrumentation: rename InstrumentListener to SimpleInstrumentListener
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242 private final class CoverageRecord extends DefaultSimpleInstrumentListener {
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243
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244 private final SourceSection srcSection; // The text of the code being counted
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245 private Instrument instrument; // The attached Instrument, in case need to remove.
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246 private long count = 0;
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247
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248 CoverageRecord(SourceSection srcSection) {
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249 this.srcSection = srcSection;
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250 }
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251
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252 @Override
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253 public void enter(Probe probe) {
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254 if (isEnabled()) {
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255 count++;
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256 }
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257 }
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258
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259 }
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260
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261 private static final class LineLocationEntryComparator implements Comparator<Entry<LineLocation, CoverageRecord>> {
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262
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263 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.
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parents: 21951
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264 return e1.getKey().compareTo(e2.getKey());
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265 }
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266 }
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267
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268 /**
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269 * Attach a counting instrument to each node that is assigned a specified tag.
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270 */
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271 private class CoverageProbeListener extends DefaultProbeListener {
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272
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273 @Override
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274 public void probeTaggedAs(Probe probe, SyntaxTag tag, Object tagValue) {
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275 if (countingTag == tag) {
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276
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277 final SourceSection srcSection = probe.getProbedSourceSection();
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278 if (srcSection == null) {
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279 // TODO (mlvdv) report this?
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280 return;
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281 }
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282 // Get the source line where the
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diff changeset
283 final LineLocation lineLocation = srcSection.getLineLocation();
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diff changeset
284 CoverageRecord record = coverageMap.get(lineLocation);
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diff changeset
285 if (record != null) {
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286 // Another node starts on same line; count only the first (textually)
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diff changeset
287 if (srcSection.getCharIndex() > record.srcSection.getCharIndex()) {
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diff changeset
288 // Existing record, corresponds to code earlier on line
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diff changeset
289 return;
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diff changeset
290 } else {
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diff changeset
291 // Existing record, corresponds to code at a later position; replace it
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diff changeset
292 record.instrument.dispose();
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293 }
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diff changeset
294 }
19593
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diff changeset
295
22093
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diff changeset
296 final CoverageRecord coverage = new CoverageRecord(srcSection);
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diff changeset
297 final Instrument instrument = Instrument.create(coverage, CoverageTracker.class.getSimpleName());
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diff changeset
298 coverage.instrument = instrument;
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diff changeset
299 instruments.add(instrument);
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Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 21987
diff changeset
300 probe.attach(instrument);
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Michael Van De Vanter <michael.van.de.vanter@oracle.com>
parents: 21987
diff changeset
301 coverageMap.put(lineLocation, coverage);
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302 }
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303 }
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304 }
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305
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diff changeset
306 }