1 | /*! @file DesiredSymbols.cc |
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2 | * @brief DesiredSymbols Implementation |
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3 | * |
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4 | * This file contains the implementation of the functions |
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5 | * which provide the functionality of the DesiredSymbols. |
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6 | */ |
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7 | |
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8 | #ifdef __CYGWIN__ |
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9 | #undef __STRICT_ANSI__ |
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10 | #endif |
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11 | |
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12 | #include <limits.h> |
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13 | #include <stdio.h> |
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14 | #include <stdlib.h> |
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15 | #include <string.h> |
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16 | #include <unistd.h> |
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17 | |
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18 | #include <iostream> |
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19 | |
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20 | #include "rld.h" |
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21 | #include <rld-config.h> |
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22 | #include "rld-symbols.h" |
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23 | #include "rld-files.h" |
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24 | |
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25 | #include "DesiredSymbols.h" |
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26 | #include "app_common.h" |
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27 | #include "CoverageMap.h" |
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28 | #include "ObjdumpProcessor.h" |
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29 | |
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30 | namespace Coverage { |
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31 | |
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32 | DesiredSymbols::DesiredSymbols() |
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33 | { |
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34 | } |
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35 | |
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36 | DesiredSymbols::~DesiredSymbols() |
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37 | { |
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38 | } |
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39 | |
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40 | void DesiredSymbols::load( |
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41 | const std::string& symbolsSet, |
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42 | const std::string& buildTarget, |
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43 | const std::string& buildBSP, |
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44 | bool verbose |
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45 | ) |
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46 | { |
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47 | rld::files::cache cache; |
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48 | |
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49 | // |
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50 | // Load the INI file looking for a top level: |
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51 | // |
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52 | // [symbols-sets] |
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53 | // sets = A, B, C |
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54 | // |
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55 | // For each set read the libraries from the configuration file and load. |
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56 | // |
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57 | // [A] |
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58 | // libraries = @BUILD-PREFIX@/c/@BSP@/A/libA.a |
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59 | // |
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60 | // [B] |
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61 | // libraries = @BUILD-PREFIX@/c/@BSP@/B/libB.a |
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62 | // |
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63 | try { |
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64 | cache.open(); |
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65 | |
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66 | rld::config::config config; |
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67 | |
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68 | if (verbose) |
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69 | std::cerr << "Loading symbol sets: " << symbolsSet << std::endl; |
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70 | |
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71 | config.load (symbolsSet); |
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72 | |
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73 | const rld::config::section& sym_section = config.get_section("symbol-sets"); |
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74 | |
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75 | rld::strings sets; |
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76 | rld::config::parse_items (sym_section, "sets", sets, true); |
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77 | |
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78 | for (const std::string set : sets) { |
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79 | if (verbose) |
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80 | std::cerr << " Symbol set: " << set << std::endl; |
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81 | const rld::config::section& set_section = config.get_section(set); |
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82 | rld::strings libs; |
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83 | rld::config::parse_items (set_section, "libraries", libs, true); |
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84 | for (std::string lib : libs) { |
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85 | lib = rld::find_replace(lib, "@BUILD-TARGET@", buildTarget); |
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86 | lib = rld::find_replace(lib, "@BSP@", buildBSP); |
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87 | if (verbose) |
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88 | std::cerr << " Loading library: " << lib << std::endl; |
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89 | cache.add(lib); |
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90 | } |
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91 | } |
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92 | |
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93 | rld::symbols::table symbols; |
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94 | |
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95 | cache.load_symbols (symbols, true); |
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96 | |
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97 | for (auto& kv : symbols.globals()) { |
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98 | const rld::symbols::symbol& sym = *(kv.second); |
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99 | if (sym.type() == sym.st_func) |
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100 | set[sym.name()] = *(new SymbolInformation); |
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101 | } |
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102 | for (auto& kv : symbols.weaks()) { |
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103 | const rld::symbols::symbol& sym = *(kv.second); |
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104 | if (sym.type() == sym.st_func) |
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105 | set[sym.name()] = *(new SymbolInformation); |
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106 | } |
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107 | } catch (...) { |
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108 | cache.close(); |
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109 | throw; |
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110 | } |
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111 | |
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112 | cache.close(); |
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113 | } |
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114 | |
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115 | void DesiredSymbols::preprocess( void ) |
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116 | { |
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117 | |
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118 | // Look at each symbol. |
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119 | for (auto& s : SymbolsToAnalyze->set) { |
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120 | // If the unified coverage map does not exist, the symbol was |
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121 | // never referenced by any executable. Just skip it. |
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122 | CoverageMapBase* theCoverageMap = s.second.unifiedCoverageMap; |
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123 | if (theCoverageMap) |
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124 | { |
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125 | // Mark any branch and NOP instructions. |
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126 | for (auto& f : s.second.instructions) { |
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127 | if (f.isBranch) |
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128 | theCoverageMap->setIsBranch( f.address - s.second.baseAddress ); |
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129 | if (f.isNop) |
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130 | theCoverageMap->setIsNop( f.address - s.second.baseAddress ); |
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131 | } |
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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 | void DesiredSymbols::calculateStatistics( void ) |
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137 | { |
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138 | // Look at each symbol. |
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139 | for (auto& s : SymbolsToAnalyze->set) { |
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140 | // If the unified coverage map does not exist, the symbol was |
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141 | // never referenced by any executable. Just skip it. |
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142 | CoverageMapBase* theCoverageMap = s.second.unifiedCoverageMap; |
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143 | if (theCoverageMap) |
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144 | { |
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145 | // Increment the total sizeInBytes byt the bytes in the symbol |
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146 | stats.sizeInBytes += s.second.stats.sizeInBytes; |
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147 | |
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148 | // Now scan through the coverage map of this symbol. |
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149 | uint32_t endAddress = s.second.stats.sizeInBytes - 1; |
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150 | |
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151 | for (uint32_t a = 0; a <= endAddress; ++a) { |
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152 | // If we are at the start of instruction increment |
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153 | // instruction type counters as needed. |
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154 | if ( theCoverageMap->isStartOfInstruction( a ) ) { |
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155 | |
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156 | stats.sizeInInstructions++; |
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157 | s.second.stats.sizeInInstructions++; |
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158 | |
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159 | if (!theCoverageMap->wasExecuted( a ) ) { |
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160 | stats.uncoveredInstructions++; |
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161 | s.second.stats.uncoveredInstructions++; |
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162 | |
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163 | if ( theCoverageMap->isBranch( a )) { |
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164 | stats.branchesNotExecuted++; |
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165 | s.second.stats.branchesNotExecuted++; |
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166 | } |
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167 | } else if (theCoverageMap->isBranch( a )) { |
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168 | stats.branchesExecuted++; |
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169 | s.second.stats.branchesExecuted++; |
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170 | } |
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171 | } |
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172 | |
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173 | if (!theCoverageMap->wasExecuted( a )) { |
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174 | stats.uncoveredBytes++; |
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175 | s.second.stats.uncoveredBytes++; |
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176 | } |
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177 | } |
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178 | } |
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179 | } |
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180 | } |
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181 | |
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182 | |
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183 | void DesiredSymbols::computeUncovered( void ) |
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184 | { |
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185 | // Look at each symbol. |
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186 | for (auto& s : SymbolsToAnalyze->set) { |
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187 | // If the unified coverage map does not exist, the symbol was |
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188 | // never referenced by any executable. Just skip it. |
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189 | CoverageMapBase* theCoverageMap = s.second.unifiedCoverageMap; |
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190 | if (theCoverageMap) |
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191 | { |
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192 | // Create containers for the symbol's uncovered ranges and branches. |
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193 | CoverageRanges* theRanges = new CoverageRanges(); |
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194 | s.second.uncoveredRanges = theRanges; |
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195 | CoverageRanges* theBranches = new CoverageRanges(); |
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196 | s.second.uncoveredBranches = theBranches; |
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197 | |
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198 | uint32_t a; |
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199 | uint32_t la; |
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200 | uint32_t ha; |
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201 | uint32_t endAddress; |
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202 | uint32_t count; |
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203 | |
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204 | // Mark NOPs as executed |
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205 | endAddress = s.second.stats.sizeInBytes - 1; |
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206 | a = 0; |
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207 | while (a < endAddress) { |
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208 | if (!theCoverageMap->wasExecuted( a )) { |
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209 | a++; |
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210 | continue; |
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211 | } |
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212 | |
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213 | for (ha=a+1; |
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214 | ha <= endAddress && !theCoverageMap->isStartOfInstruction( ha ); |
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215 | ha++) |
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216 | ; |
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217 | if ( ha >= endAddress ) |
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218 | break; |
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219 | |
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220 | if (theCoverageMap->isNop( ha )) |
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221 | do { |
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222 | theCoverageMap->setWasExecuted( ha ); |
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223 | ha++; |
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224 | if ( ha >= endAddress ) |
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225 | break; |
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226 | } while ( !theCoverageMap->isStartOfInstruction( ha ) ); |
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227 | a = ha; |
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228 | } |
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229 | |
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230 | // Now scan through the coverage map of this symbol. |
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231 | endAddress = s.second.stats.sizeInBytes - 1; |
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232 | a = 0; |
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233 | while (a <= endAddress) { |
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234 | // If an address was NOT executed, find consecutive unexecuted |
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235 | // addresses and add them to the uncovered ranges. |
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236 | if (!theCoverageMap->wasExecuted( a )) { |
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237 | |
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238 | la = a; |
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239 | count = 1; |
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240 | for (ha = a + 1; |
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241 | ha <= endAddress && !theCoverageMap->wasExecuted( ha ); |
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242 | ha++) |
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243 | { |
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244 | if ( theCoverageMap->isStartOfInstruction( ha ) ) |
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245 | count++; |
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246 | } |
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247 | ha--; |
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248 | |
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249 | stats.uncoveredRanges++; |
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250 | s.second.stats.uncoveredRanges++; |
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251 | theRanges->add( |
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252 | s.second.baseAddress + la, |
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253 | s.second.baseAddress + ha, |
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254 | CoverageRanges::UNCOVERED_REASON_NOT_EXECUTED, |
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255 | count |
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256 | ); |
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257 | a = ha + 1; |
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258 | } |
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259 | |
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260 | // If an address is a branch instruction, add any uncovered branches |
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261 | // to the uncoverd branches. |
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262 | else if (theCoverageMap->isBranch( a )) { |
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263 | la = a; |
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264 | for (ha = a + 1; |
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265 | ha <= endAddress && !theCoverageMap->isStartOfInstruction( ha ); |
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266 | ha++) |
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267 | ; |
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268 | ha--; |
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269 | |
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270 | if (theCoverageMap->wasAlwaysTaken( la )) { |
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271 | stats.branchesAlwaysTaken++; |
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272 | s.second.stats.branchesAlwaysTaken++; |
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273 | theBranches->add( |
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274 | s.second.baseAddress + la, |
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275 | s.second.baseAddress + ha, |
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276 | CoverageRanges::UNCOVERED_REASON_BRANCH_ALWAYS_TAKEN, |
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277 | 1 |
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278 | ); |
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279 | if (Verbose) |
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280 | std::cerr << "Branch always taken found in" << s.first |
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281 | << std::hex |
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282 | << " (0x" << s.second.baseAddress + la |
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283 | << " - 0x" << s.second.baseAddress + ha |
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284 | << ")" |
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285 | << std::dec |
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286 | << std::endl; |
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287 | } |
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288 | else if (theCoverageMap->wasNeverTaken( la )) { |
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289 | stats.branchesNeverTaken++; |
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290 | s.second.stats.branchesNeverTaken++; |
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291 | theBranches->add( |
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292 | s.second.baseAddress + la, |
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293 | s.second.baseAddress + ha, |
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294 | CoverageRanges::UNCOVERED_REASON_BRANCH_NEVER_TAKEN, |
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295 | 1 |
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296 | ); |
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297 | if (Verbose) |
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298 | std::cerr << "Branch never taken found in " << s.first |
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299 | << std::hex |
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300 | << " (0x" << s.second.baseAddress + la |
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301 | << " - 0x" << s.second.baseAddress + ha |
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302 | << ")" |
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303 | << std::dec |
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304 | << std::endl; |
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305 | } |
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306 | a = ha + 1; |
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307 | } |
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308 | else |
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309 | a++; |
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310 | } |
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311 | } |
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312 | } |
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313 | } |
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314 | |
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315 | |
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316 | void DesiredSymbols::createCoverageMap( |
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317 | const std::string& exefileName, |
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318 | const std::string& symbolName, |
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319 | uint32_t size |
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320 | ) |
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321 | { |
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322 | CoverageMapBase* aCoverageMap; |
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323 | uint32_t highAddress; |
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324 | |
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325 | // Ensure that the symbol is a desired symbol. |
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326 | symbolSet_t::iterator itr = set.find( symbolName ); |
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327 | |
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328 | if (itr == set.end()) { |
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329 | std::ostringstream what; |
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330 | what << "Unable to create unified coverage map for " |
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331 | << symbolName |
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332 | << " because it is NOT a desired symbol"; |
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333 | throw rld::error( what, "DesiredSymbols::createCoverageMap" ); |
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334 | } |
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335 | |
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336 | // If we have already created a coverage map, ... |
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337 | if (itr->second.unifiedCoverageMap) { |
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338 | |
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339 | // ensure that the specified size matches the existing size. |
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340 | if (itr->second.stats.sizeInBytes != size) { |
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341 | |
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342 | // Changed ERROR to INFO because size mismatch is not treated as |
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343 | // error anymore. |
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344 | // Set smallest size as size and continue. |
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345 | // Update value for longer byte size. |
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346 | // 2015-07-22 |
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347 | std::cerr << "INFO: DesiredSymbols::createCoverageMap - Attempt to create " |
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348 | << "unified coverage maps for " |
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349 | << symbolName |
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350 | << " with different sizes (" |
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351 | << rld::path::basename(exefileName) << '/' << itr->second.stats.sizeInBytes |
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352 | << " != " |
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353 | << rld::path::basename(itr->second.sourceFile->getFileName()) |
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354 | << '/' << size << ')' |
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355 | << std::endl; |
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356 | |
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357 | if ( itr->second.stats.sizeInBytes < size ) |
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358 | itr->second.stats.sizeInBytes = size; |
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359 | else |
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360 | size = itr->second.stats.sizeInBytes; |
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361 | } |
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362 | } |
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363 | |
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364 | // If we don't already have a coverage map, create one. |
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365 | else { |
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366 | |
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367 | highAddress = size - 1; |
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368 | |
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369 | aCoverageMap = new CoverageMap( exefileName, 0, highAddress ); |
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370 | |
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371 | if ( Verbose ) |
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372 | fprintf( |
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373 | stderr, |
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374 | "Created unified coverage map for %s (0x%x - 0x%x)\n", |
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375 | symbolName.c_str(), 0, highAddress |
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376 | ); |
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377 | itr->second.unifiedCoverageMap = aCoverageMap; |
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378 | itr->second.stats.sizeInBytes = size; |
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379 | } |
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380 | } |
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381 | |
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382 | void DesiredSymbols::determineSourceLines( |
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383 | CoverageRanges* const theRanges, |
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384 | ExecutableInfo* const theExecutable |
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385 | |
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386 | ) |
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387 | { |
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388 | for (auto& r : theRanges->set) { |
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389 | std::string location; |
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390 | theExecutable->getSourceAndLine(r.lowAddress, location); |
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391 | r.lowSourceLine = rld::path::basename (location); |
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392 | theExecutable->getSourceAndLine(r.highAddress, location); |
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393 | r.highSourceLine = rld::path::basename (location); |
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394 | } |
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395 | } |
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396 | |
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397 | SymbolInformation* DesiredSymbols::find( |
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398 | const std::string& symbolName |
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399 | ) |
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400 | { |
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401 | if (set.find( symbolName ) == set.end()) |
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402 | return NULL; |
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403 | else |
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404 | return &set[ symbolName ]; |
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405 | } |
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406 | |
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407 | void DesiredSymbols::findSourceForUncovered( void ) |
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408 | { |
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409 | // Process uncovered ranges and/or branches for each symbol. |
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410 | for (auto& d : SymbolsToAnalyze->set) { |
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411 | // First the unexecuted ranges, ... |
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412 | CoverageRanges* theRanges = d.second.uncoveredRanges; |
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413 | if (theRanges != nullptr) { |
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414 | if (!theRanges->set.empty()) { |
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415 | if (Verbose) |
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416 | std::cerr << "Looking up source lines for uncovered ranges in " |
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417 | << d.first |
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418 | << std::endl; |
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419 | determineSourceLines( theRanges, d.second.sourceFile ); |
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420 | } |
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421 | |
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422 | // then the uncovered branches. |
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423 | CoverageRanges* theBranches = d.second.uncoveredBranches; |
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424 | if (theBranches != nullptr) { |
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425 | if (!theBranches->set.empty()) { |
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426 | if (Verbose) |
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427 | std::cerr << "Looking up source lines for uncovered branches in " |
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428 | << d.first |
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429 | << std::endl; |
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430 | determineSourceLines( theBranches, d.second.sourceFile ); |
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431 | } |
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432 | } |
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433 | } |
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434 | } |
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435 | } |
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436 | |
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437 | uint32_t DesiredSymbols::getNumberBranchesAlwaysTaken( void ) const { |
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438 | return stats.branchesAlwaysTaken; |
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439 | }; |
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440 | |
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441 | uint32_t DesiredSymbols::getNumberBranchesFound( void ) const { |
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442 | return (stats.branchesNotExecuted + stats.branchesExecuted); |
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443 | }; |
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444 | |
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445 | uint32_t DesiredSymbols::getNumberBranchesNeverTaken( void ) const { |
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446 | return stats.branchesNeverTaken; |
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447 | }; |
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448 | |
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449 | uint32_t DesiredSymbols::getNumberUncoveredRanges( void ) const { |
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450 | return stats.uncoveredRanges; |
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451 | }; |
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452 | |
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453 | bool DesiredSymbols::isDesired ( |
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454 | const std::string& symbolName |
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455 | ) const |
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456 | { |
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457 | return set.find( symbolName ) == set.end() ? false : true; |
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458 | } |
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459 | |
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460 | void DesiredSymbols::mergeCoverageMap( |
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461 | const std::string& symbolName, |
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462 | const CoverageMapBase* const sourceCoverageMap |
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463 | ) |
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464 | { |
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465 | // Ensure that the symbol is a desired symbol. |
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466 | symbolSet_t::iterator itr = set.find( symbolName ); |
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467 | |
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468 | if (itr == set.end()) { |
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469 | std::ostringstream what; |
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470 | what << "Unable to merge coverage map for " |
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471 | << symbolName |
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472 | << " because it is NOT a desired symbol"; |
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473 | throw rld::error( what, "DesiredSymbols::mergeCoverageMap" ); |
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474 | } |
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475 | |
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476 | SymbolInformation& sinfo = itr->second; |
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477 | |
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478 | // Ensure that the source and destination coverage maps |
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479 | // are the same size. |
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480 | // Changed from ERROR msg to INFO, because size mismatch is not |
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481 | // treated as error anymore. 2015-07-20 |
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482 | uint32_t dMapSize = sinfo.stats.sizeInBytes; |
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483 | uint32_t sBaseAddress = sourceCoverageMap->getFirstLowAddress(); |
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484 | uint32_t sMapSize = sourceCoverageMap->getSize(); |
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485 | if (dMapSize != 0 && dMapSize != sMapSize) { |
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486 | std::cerr << "INFO: DesiredSymbols::mergeCoverageMap - Unable to merge " |
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487 | << "coverage map for " << symbolName |
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488 | << " because the sizes are different (" |
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489 | << "size: " << dMapSize << ", source: " << sMapSize << ')' |
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490 | << std::endl; |
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491 | return; |
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492 | } |
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493 | |
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494 | // Merge the data for each address. |
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495 | CoverageMapBase* destinationCoverageMap = sinfo.unifiedCoverageMap; |
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496 | |
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497 | for (uint32_t dAddress = 0; dAddress < dMapSize; dAddress++) { |
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498 | |
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499 | uint32_t sAddress = dAddress + sBaseAddress; |
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500 | |
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501 | // Merge start of instruction indication. |
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502 | if (sourceCoverageMap->isStartOfInstruction( sAddress )) |
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503 | destinationCoverageMap->setIsStartOfInstruction( dAddress ); |
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504 | |
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505 | // Merge the execution data. |
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506 | uint32_t executionCount = sourceCoverageMap->getWasExecuted( sAddress ); |
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507 | destinationCoverageMap->sumWasExecuted( dAddress, executionCount ); |
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508 | |
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509 | // Merge the branch data. |
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510 | executionCount = sourceCoverageMap->getWasTaken( sAddress ); |
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511 | destinationCoverageMap->sumWasTaken( dAddress, executionCount ); |
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512 | |
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513 | executionCount = sourceCoverageMap->getWasNotTaken( sAddress ); |
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514 | destinationCoverageMap->sumWasNotTaken( dAddress, executionCount ); |
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515 | } |
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516 | } |
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517 | } |
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