Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.truffle.tools/src/com/oracle/truffle/tools/CoverageTracker.java @ 21870:12dcf5ba8b34
Merge with jdk8u45-b14
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Tue, 09 Jun 2015 11:54:04 +0200 |
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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.*; |
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28 import java.util.*; |
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29 import java.util.Map.Entry; |
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30 |
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31 import com.oracle.truffle.api.instrument.*; |
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32 import com.oracle.truffle.api.instrument.impl.*; |
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33 import com.oracle.truffle.api.nodes.*; |
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34 import com.oracle.truffle.api.source.*; |
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35 |
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36 /** |
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37 * An {@link InstrumentationTool} that counts interpreter <em>execution calls</em> to AST nodes that |
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38 * hold a specified {@linkplain SyntaxTag syntax tag}, tabulated by source and line number |
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39 * associated with each node. Syntax tags are presumed to be applied external to the tool. If no tag |
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40 * is specified, {@linkplain StandardSyntaxTag#STATEMENT STATEMENT} is used, corresponding to |
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41 * conventional behavior for code coverage tools. |
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42 * <p> |
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43 * No counts will be kept for execution in sources that hold the {@link SourceTag} |
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44 * {@link Tags#NO_COVERAGE}. |
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45 * <p> |
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46 * <b>Tool Life Cycle</b> |
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47 * <p> |
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48 * See {@link InstrumentationTool} for the life cycle common to all such tools. |
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49 * <p> |
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50 * <b>Execution Counts</b> |
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51 * <p> |
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52 * <ul> |
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53 * <li>"Execution call" on a node is is defined as invocation of a node method that is instrumented |
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54 * to produce the event {@link SimpleInstrumentListener#enter(Probe)};</li> |
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55 * <li>Execution calls are tabulated only at <em>instrumented</em> nodes, i.e. those for which |
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56 * {@linkplain Node#isInstrumentable() isInstrumentable() == true};</li> |
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57 * <li>Execution calls are tabulated only at nodes present in the AST when originally created; |
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58 * dynamically added nodes will not be instrumented.</li> |
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59 * </ul> |
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60 * </p> |
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61 * <b>Results</b> |
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62 * <p> |
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63 * A modification-safe copy of the {@linkplain #getCounts() counts} can be retrieved at any time, |
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64 * without effect on the state of the tool. |
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65 * </p> |
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66 * <p> |
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67 * A "default" {@linkplain #print(PrintStream) print()} method can summarizes the current counts at |
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68 * any time in a simple textual format, with no other effect on the state of the tool. |
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69 * </p> |
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70 * |
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71 * @see Instrument |
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72 * @see SyntaxTag |
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73 */ |
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74 public final class CoverageTracker extends InstrumentationTool { |
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75 |
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76 public enum Tags implements SourceTag { |
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77 |
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78 /** |
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79 * Report no counts for sources holding this tag. |
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80 */ |
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81 NO_COVERAGE("No Coverage", "Coverage Tracker will igore"); |
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82 |
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83 private final String name; |
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84 private final String description; |
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85 |
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86 private Tags(String name, String description) { |
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87 this.name = name; |
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88 this.description = description; |
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89 } |
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90 |
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91 public String getName() { |
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92 return name; |
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93 } |
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94 |
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95 public String getDescription() { |
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96 return description; |
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97 } |
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98 } |
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99 |
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100 /** Counting data. */ |
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101 private final Map<LineLocation, CoverageRecord> coverageMap = new HashMap<>(); |
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102 |
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103 /** Needed for disposal. */ |
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104 private final List<Instrument> instruments = new ArrayList<>(); |
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105 |
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106 /** |
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107 * Coverage counting is restricted to nodes holding this tag. |
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108 */ |
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109 private final SyntaxTag countingTag; |
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110 |
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111 private final ProbeListener probeListener; |
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112 |
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113 /** |
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114 * Create a per-line coverage tool for nodes tagged as {@linkplain StandardSyntaxTag#STATEMENT |
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115 * statements} in subsequently created ASTs. |
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116 */ |
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117 public CoverageTracker() { |
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118 this(StandardSyntaxTag.STATEMENT); |
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119 } |
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120 |
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121 /** |
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122 * Create a per-line coverage tool for nodes tagged as specified, presuming that tags applied |
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123 * outside this tool. |
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124 */ |
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125 public CoverageTracker(SyntaxTag tag) { |
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126 this.probeListener = new CoverageProbeListener(); |
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127 this.countingTag = tag; |
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128 } |
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129 |
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130 @Override |
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131 protected boolean internalInstall() { |
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132 Probe.addProbeListener(probeListener); |
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133 return true; |
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134 } |
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135 |
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136 @Override |
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137 protected void internalReset() { |
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138 coverageMap.clear(); |
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139 } |
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140 |
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141 @Override |
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142 protected void internalDispose() { |
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143 Probe.removeProbeListener(probeListener); |
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144 for (Instrument instrument : instruments) { |
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145 instrument.dispose(); |
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146 } |
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147 } |
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148 |
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149 /** |
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150 * Gets a modification-safe summary of the current per-type node execution counts; does not |
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151 * affect the counts. |
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152 * <p> |
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153 * The map holds an array for each source, and elements of the a array corresponding to the |
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154 * textual lines of that source. An array entry contains null if the corresponding line of |
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155 * source is associated with no nodes of the relevant type, i.e. where no count was made. A |
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156 * numeric entry represents the execution count at the corresponding line of source. |
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157 * <p> |
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158 * <b>Note:</b> source line numbers are 1-based, so array index {@code i} corresponds to source |
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159 * line number {@code i + 1} |
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160 */ |
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161 public Map<Source, Long[]> getCounts() { |
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162 |
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163 /** |
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164 * Counters for every {Source, line number} for which a counter was installed, i.e. for |
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165 * every line associated with an appropriately tagged AST node; iterable in order of source |
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166 * name, then line number. |
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167 */ |
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168 final TreeSet<Entry<LineLocation, CoverageRecord>> entries = new TreeSet<>(new LineLocationEntryComparator()); |
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169 |
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170 for (Entry<LineLocation, CoverageRecord> entry : coverageMap.entrySet()) { |
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171 entries.add(entry); |
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172 } |
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173 final Map<Source, Long[]> result = new HashMap<>(); |
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174 Source curSource = null; |
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175 Long[] curLineTable = null; |
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176 for (Entry<LineLocation, CoverageRecord> entry : entries) { |
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177 final LineLocation key = entry.getKey(); |
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178 final Source source = key.getSource(); |
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179 final int lineNo = key.getLineNumber(); |
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180 if (source != curSource) { |
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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 curSource = source; |
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185 curLineTable = new Long[source.getLineCount()]; |
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186 } |
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187 curLineTable[lineNo - 1] = entry.getValue().count; |
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188 } |
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189 if (curSource != null) { |
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190 result.put(curSource, curLineTable); |
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191 } |
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192 return result; |
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193 } |
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194 |
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195 /** |
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196 * A default printer for the current line counts, producing lines of the form " (<count>) <line |
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197 * number> : <text of line>", grouped by source. |
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198 */ |
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199 public void print(PrintStream out) { |
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200 out.println(); |
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201 out.println(countingTag.name() + " coverage:"); |
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202 |
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203 /** |
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204 * Counters for every {Source, line number} for which a counter was installed, i.e. for |
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205 * every line associated with an appropriately tagged AST node; iterable in order of source |
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206 * name, then line number. |
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207 */ |
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208 final TreeSet<Entry<LineLocation, CoverageRecord>> entries = new TreeSet<>(new LineLocationEntryComparator()); |
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209 |
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210 for (Entry<LineLocation, CoverageRecord> entry : coverageMap.entrySet()) { |
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211 entries.add(entry); |
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212 } |
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213 Source curSource = null; |
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214 int curLineNo = 1; |
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215 for (Entry<LineLocation, CoverageRecord> entry : entries) { |
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216 final LineLocation key = entry.getKey(); |
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217 final Source source = key.getSource(); |
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218 final int lineNo = key.getLineNumber(); |
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219 if (source != curSource) { |
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220 if (curSource != null) { |
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221 while (curLineNo <= curSource.getLineCount()) { |
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222 displayLine(out, null, curSource, curLineNo++); |
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223 } |
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224 } |
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225 curSource = source; |
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226 curLineNo = 1; |
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227 out.println(); |
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228 out.println(source.getPath()); |
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229 } |
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230 while (curLineNo < lineNo) { |
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231 displayLine(out, null, curSource, curLineNo++); |
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232 } |
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233 displayLine(out, entry.getValue(), curSource, curLineNo++); |
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234 } |
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235 if (curSource != null) { |
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236 while (curLineNo <= curSource.getLineCount()) { |
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237 displayLine(out, null, curSource, curLineNo++); |
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238 } |
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239 } |
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240 } |
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241 |
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242 private static void displayLine(PrintStream out, CoverageRecord record, Source source, int lineNo) { |
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243 if (record == null) { |
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244 out.format("%14s", " "); |
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245 } else { |
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246 out.format("(%12d)", record.count); |
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247 } |
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248 out.format(" %3d: ", lineNo); |
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249 out.println(source.getCode(lineNo)); |
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250 } |
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251 |
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252 /** |
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253 * A listener for events at each instrumented AST location. This listener counts |
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254 * "execution calls" to the instrumented node. |
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255 */ |
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256 private final class CoverageRecord extends DefaultSimpleInstrumentListener { |
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257 |
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258 private final SourceSection srcSection; // The text of the code being counted |
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259 private Instrument instrument; // The attached Instrument, in case need to remove. |
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260 private long count = 0; |
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261 |
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262 CoverageRecord(SourceSection srcSection) { |
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263 this.srcSection = srcSection; |
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264 } |
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265 |
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266 @Override |
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267 public void enter(Probe probe) { |
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268 if (isEnabled()) { |
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269 count++; |
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270 } |
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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 private static final class LineLocationEntryComparator implements Comparator<Entry<LineLocation, CoverageRecord>> { |
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276 |
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277 public int compare(Entry<LineLocation, CoverageRecord> e1, Entry<LineLocation, CoverageRecord> e2) { |
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278 return LineLocation.COMPARATOR.compare(e1.getKey(), e2.getKey()); |
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279 } |
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280 } |
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281 |
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282 /** |
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283 * Attach a counting instrument to each node that is assigned a specified tag. |
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284 */ |
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285 private class CoverageProbeListener extends DefaultProbeListener { |
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286 |
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287 @Override |
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288 public void probeTaggedAs(Probe probe, SyntaxTag tag, Object tagValue) { |
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289 if (countingTag == tag) { |
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290 |
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291 final SourceSection srcSection = probe.getProbedSourceSection(); |
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292 if (srcSection == null) { |
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293 // TODO (mlvdv) report this? |
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294 } else if (!srcSection.getSource().isTaggedAs(Tags.NO_COVERAGE)) { |
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295 // Get the source line where the |
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296 final LineLocation lineLocation = srcSection.getLineLocation(); |
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297 CoverageRecord record = coverageMap.get(lineLocation); |
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298 if (record != null) { |
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299 // Another node starts on same line; count only the first (textually) |
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300 if (srcSection.getCharIndex() > record.srcSection.getCharIndex()) { |
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301 // Existing record, corresponds to code earlier on line |
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302 return; |
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303 } else { |
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304 // Existing record, corresponds to code at a later position; replace it |
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305 record.instrument.dispose(); |
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306 } |
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307 } |
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308 |
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309 final CoverageRecord coverage = new CoverageRecord(srcSection); |
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310 final Instrument instrument = Instrument.create(coverage, CoverageTracker.class.getSimpleName()); |
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311 coverage.instrument = instrument; |
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312 instruments.add(instrument); |
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313 probe.attach(instrument); |
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314 coverageMap.put(lineLocation, coverage); |
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315 } |
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316 } |
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317 } |
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318 } |
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319 |
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320 } |