1 //===- CodeCoverage.cpp - Coverage tool based on profiling instrumentation-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // The 'CodeCoverageTool' class implements a command line tool to analyze and 11 // report coverage information using the profiling instrumentation and code 12 // coverage mapping. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #include "RenderingSupport.h" 17 #include "CoverageViewOptions.h" 18 #include "CoverageFilters.h" 19 #include "SourceCoverageView.h" 20 #include "CoverageSummary.h" 21 #include "CoverageReport.h" 22 #include "llvm/ADT/StringRef.h" 23 #include "llvm/ADT/SmallString.h" 24 #include "llvm/ProfileData/InstrProfReader.h" 25 #include "llvm/ProfileData/CoverageMapping.h" 26 #include "llvm/ProfileData/CoverageMappingReader.h" 27 #include "llvm/Support/CommandLine.h" 28 #include "llvm/Support/FileSystem.h" 29 #include "llvm/Support/ManagedStatic.h" 30 #include "llvm/Support/MemoryObject.h" 31 #include "llvm/Support/Format.h" 32 #include "llvm/Support/Path.h" 33 #include "llvm/Support/Signals.h" 34 #include "llvm/Support/PrettyStackTrace.h" 35 #include <functional> 36 #include <system_error> 37 38 using namespace llvm; 39 using namespace coverage; 40 41 namespace { 42 /// \brief The implementation of the coverage tool. 43 class CodeCoverageTool { 44 public: 45 enum Command { 46 /// \brief The show command. 47 Show, 48 /// \brief The report command. 49 Report 50 }; 51 52 /// \brief Print the error message to the error output stream. 53 void error(const Twine &Message, StringRef Whence = ""); 54 55 /// \brief Return a memory buffer for the given source file. 56 ErrorOr<const MemoryBuffer &> getSourceFile(StringRef SourceFile); 57 58 /// \brief Create source views for the expansions of the view. 59 void attachExpansionSubViews(SourceCoverageView &View, 60 ArrayRef<ExpansionRecord> Expansions, 61 CoverageMapping &Coverage); 62 63 /// \brief Create the source view of a particular function. 64 std::unique_ptr<SourceCoverageView> 65 createFunctionView(const FunctionRecord &Function, CoverageMapping &Coverage); 66 67 /// \brief Create the main source view of a particular source file. 68 std::unique_ptr<SourceCoverageView> 69 createSourceFileView(StringRef SourceFile, CoverageMapping &Coverage); 70 71 /// \brief Load the coverage mapping data. Return true if an error occured. 72 std::unique_ptr<CoverageMapping> load(); 73 74 int run(Command Cmd, int argc, const char **argv); 75 76 typedef std::function<int(int, const char **)> CommandLineParserType; 77 78 int show(int argc, const char **argv, 79 CommandLineParserType commandLineParser); 80 81 int report(int argc, const char **argv, 82 CommandLineParserType commandLineParser); 83 84 std::string ObjectFilename; 85 CoverageViewOptions ViewOpts; 86 std::string PGOFilename; 87 CoverageFiltersMatchAll Filters; 88 std::vector<std::string> SourceFiles; 89 std::vector<std::pair<std::string, std::unique_ptr<MemoryBuffer>>> 90 LoadedSourceFiles; 91 bool CompareFilenamesOnly; 92 StringMap<std::string> RemappedFilenames; 93 }; 94 } 95 96 void CodeCoverageTool::error(const Twine &Message, StringRef Whence) { 97 errs() << "error: "; 98 if (!Whence.empty()) 99 errs() << Whence << ": "; 100 errs() << Message << "\n"; 101 } 102 103 ErrorOr<const MemoryBuffer &> 104 CodeCoverageTool::getSourceFile(StringRef SourceFile) { 105 // If we've remapped filenames, look up the real location for this file. 106 if (!RemappedFilenames.empty()) { 107 auto Loc = RemappedFilenames.find(SourceFile); 108 if (Loc != RemappedFilenames.end()) 109 SourceFile = Loc->second; 110 } 111 for (const auto &Files : LoadedSourceFiles) 112 if (sys::fs::equivalent(SourceFile, Files.first)) 113 return *Files.second; 114 auto Buffer = MemoryBuffer::getFile(SourceFile); 115 if (auto EC = Buffer.getError()) { 116 error(EC.message(), SourceFile); 117 return EC; 118 } 119 LoadedSourceFiles.push_back( 120 std::make_pair(SourceFile, std::move(Buffer.get()))); 121 return *LoadedSourceFiles.back().second; 122 } 123 124 void 125 CodeCoverageTool::attachExpansionSubViews(SourceCoverageView &View, 126 ArrayRef<ExpansionRecord> Expansions, 127 CoverageMapping &Coverage) { 128 if (!ViewOpts.ShowExpandedRegions) 129 return; 130 for (const auto &Expansion : Expansions) { 131 auto ExpansionCoverage = Coverage.getCoverageForExpansion(Expansion); 132 if (ExpansionCoverage.empty()) 133 continue; 134 auto SourceBuffer = getSourceFile(ExpansionCoverage.getFilename()); 135 if (!SourceBuffer) 136 continue; 137 138 auto SubViewExpansions = ExpansionCoverage.getExpansions(); 139 auto SubView = llvm::make_unique<SourceCoverageView>( 140 SourceBuffer.get(), ViewOpts, std::move(ExpansionCoverage)); 141 attachExpansionSubViews(*SubView, SubViewExpansions, Coverage); 142 View.addExpansion(Expansion.Region, std::move(SubView)); 143 } 144 } 145 146 std::unique_ptr<SourceCoverageView> 147 CodeCoverageTool::createFunctionView(const FunctionRecord &Function, 148 CoverageMapping &Coverage) { 149 auto FunctionCoverage = Coverage.getCoverageForFunction(Function); 150 if (FunctionCoverage.empty()) 151 return nullptr; 152 auto SourceBuffer = getSourceFile(FunctionCoverage.getFilename()); 153 if (!SourceBuffer) 154 return nullptr; 155 156 auto Expansions = FunctionCoverage.getExpansions(); 157 auto View = llvm::make_unique<SourceCoverageView>( 158 SourceBuffer.get(), ViewOpts, std::move(FunctionCoverage)); 159 attachExpansionSubViews(*View, Expansions, Coverage); 160 161 return View; 162 } 163 164 std::unique_ptr<SourceCoverageView> 165 CodeCoverageTool::createSourceFileView(StringRef SourceFile, 166 CoverageMapping &Coverage) { 167 auto SourceBuffer = getSourceFile(SourceFile); 168 if (!SourceBuffer) 169 return nullptr; 170 auto FileCoverage = Coverage.getCoverageForFile(SourceFile); 171 if (FileCoverage.empty()) 172 return nullptr; 173 174 auto Expansions = FileCoverage.getExpansions(); 175 auto View = llvm::make_unique<SourceCoverageView>( 176 SourceBuffer.get(), ViewOpts, std::move(FileCoverage)); 177 attachExpansionSubViews(*View, Expansions, Coverage); 178 179 for (auto Function : Coverage.getInstantiations(SourceFile)) { 180 auto SubViewCoverage = Coverage.getCoverageForFunction(*Function); 181 auto SubViewExpansions = SubViewCoverage.getExpansions(); 182 auto SubView = llvm::make_unique<SourceCoverageView>( 183 SourceBuffer.get(), ViewOpts, std::move(SubViewCoverage)); 184 attachExpansionSubViews(*SubView, SubViewExpansions, Coverage); 185 186 if (SubView) { 187 unsigned FileID = Function->CountedRegions.front().FileID; 188 unsigned Line = 0; 189 for (const auto &CR : Function->CountedRegions) 190 if (CR.FileID == FileID) 191 Line = std::max(CR.LineEnd, Line); 192 View->addInstantiation(Function->Name, Line, std::move(SubView)); 193 } 194 } 195 return View; 196 } 197 198 std::unique_ptr<CoverageMapping> CodeCoverageTool::load() { 199 auto CoverageOrErr = CoverageMapping::load(ObjectFilename, PGOFilename); 200 if (std::error_code EC = CoverageOrErr.getError()) { 201 colored_ostream(errs(), raw_ostream::RED) 202 << "error: Failed to load coverage: " << EC.message(); 203 errs() << "\n"; 204 return nullptr; 205 } 206 auto Coverage = std::move(CoverageOrErr.get()); 207 unsigned Mismatched = Coverage->getMismatchedCount(); 208 if (Mismatched) { 209 colored_ostream(errs(), raw_ostream::RED) 210 << "warning: " << Mismatched << " functions have mismatched data. "; 211 errs() << "\n"; 212 } 213 214 if (CompareFilenamesOnly) { 215 auto CoveredFiles = Coverage.get()->getUniqueSourceFiles(); 216 for (auto &SF : SourceFiles) { 217 StringRef SFBase = sys::path::filename(SF); 218 for (const auto &CF : CoveredFiles) 219 if (SFBase == sys::path::filename(CF)) { 220 RemappedFilenames[CF] = SF; 221 SF = CF; 222 break; 223 } 224 } 225 } 226 227 return Coverage; 228 } 229 230 int CodeCoverageTool::run(Command Cmd, int argc, const char **argv) { 231 // Print a stack trace if we signal out. 232 sys::PrintStackTraceOnErrorSignal(); 233 PrettyStackTraceProgram X(argc, argv); 234 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 235 236 cl::opt<std::string, true> ObjectFilename( 237 cl::Positional, cl::Required, cl::location(this->ObjectFilename), 238 cl::desc("Covered executable or object file.")); 239 240 cl::list<std::string> InputSourceFiles( 241 cl::Positional, cl::desc("<Source files>"), cl::ZeroOrMore); 242 243 cl::opt<std::string, true> PGOFilename( 244 "instr-profile", cl::Required, cl::location(this->PGOFilename), 245 cl::desc( 246 "File with the profile data obtained after an instrumented run")); 247 248 cl::opt<bool> DebugDump("dump", cl::Optional, 249 cl::desc("Show internal debug dump")); 250 251 cl::opt<bool> FilenameEquivalence( 252 "filename-equivalence", cl::Optional, 253 cl::desc("Treat source files as equivalent to paths in the coverage data " 254 "when the file names match, even if the full paths do not")); 255 256 cl::OptionCategory FilteringCategory("Function filtering options"); 257 258 cl::list<std::string> NameFilters( 259 "name", cl::Optional, 260 cl::desc("Show code coverage only for functions with the given name"), 261 cl::ZeroOrMore, cl::cat(FilteringCategory)); 262 263 cl::list<std::string> NameRegexFilters( 264 "name-regex", cl::Optional, 265 cl::desc("Show code coverage only for functions that match the given " 266 "regular expression"), 267 cl::ZeroOrMore, cl::cat(FilteringCategory)); 268 269 cl::opt<double> RegionCoverageLtFilter( 270 "region-coverage-lt", cl::Optional, 271 cl::desc("Show code coverage only for functions with region coverage " 272 "less than the given threshold"), 273 cl::cat(FilteringCategory)); 274 275 cl::opt<double> RegionCoverageGtFilter( 276 "region-coverage-gt", cl::Optional, 277 cl::desc("Show code coverage only for functions with region coverage " 278 "greater than the given threshold"), 279 cl::cat(FilteringCategory)); 280 281 cl::opt<double> LineCoverageLtFilter( 282 "line-coverage-lt", cl::Optional, 283 cl::desc("Show code coverage only for functions with line coverage less " 284 "than the given threshold"), 285 cl::cat(FilteringCategory)); 286 287 cl::opt<double> LineCoverageGtFilter( 288 "line-coverage-gt", cl::Optional, 289 cl::desc("Show code coverage only for functions with line coverage " 290 "greater than the given threshold"), 291 cl::cat(FilteringCategory)); 292 293 auto commandLineParser = [&, this](int argc, const char **argv) -> int { 294 cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n"); 295 ViewOpts.Debug = DebugDump; 296 CompareFilenamesOnly = FilenameEquivalence; 297 298 // Create the function filters 299 if (!NameFilters.empty() || !NameRegexFilters.empty()) { 300 auto NameFilterer = new CoverageFilters; 301 for (const auto &Name : NameFilters) 302 NameFilterer->push_back(llvm::make_unique<NameCoverageFilter>(Name)); 303 for (const auto &Regex : NameRegexFilters) 304 NameFilterer->push_back( 305 llvm::make_unique<NameRegexCoverageFilter>(Regex)); 306 Filters.push_back(std::unique_ptr<CoverageFilter>(NameFilterer)); 307 } 308 if (RegionCoverageLtFilter.getNumOccurrences() || 309 RegionCoverageGtFilter.getNumOccurrences() || 310 LineCoverageLtFilter.getNumOccurrences() || 311 LineCoverageGtFilter.getNumOccurrences()) { 312 auto StatFilterer = new CoverageFilters; 313 if (RegionCoverageLtFilter.getNumOccurrences()) 314 StatFilterer->push_back(llvm::make_unique<RegionCoverageFilter>( 315 RegionCoverageFilter::LessThan, RegionCoverageLtFilter)); 316 if (RegionCoverageGtFilter.getNumOccurrences()) 317 StatFilterer->push_back(llvm::make_unique<RegionCoverageFilter>( 318 RegionCoverageFilter::GreaterThan, RegionCoverageGtFilter)); 319 if (LineCoverageLtFilter.getNumOccurrences()) 320 StatFilterer->push_back(llvm::make_unique<LineCoverageFilter>( 321 LineCoverageFilter::LessThan, LineCoverageLtFilter)); 322 if (LineCoverageGtFilter.getNumOccurrences()) 323 StatFilterer->push_back(llvm::make_unique<LineCoverageFilter>( 324 RegionCoverageFilter::GreaterThan, LineCoverageGtFilter)); 325 Filters.push_back(std::unique_ptr<CoverageFilter>(StatFilterer)); 326 } 327 328 for (const auto &File : InputSourceFiles) { 329 SmallString<128> Path(File); 330 if (std::error_code EC = sys::fs::make_absolute(Path)) { 331 errs() << "error: " << File << ": " << EC.message(); 332 return 1; 333 } 334 SourceFiles.push_back(Path.str()); 335 } 336 return 0; 337 }; 338 339 switch (Cmd) { 340 case Show: 341 return show(argc, argv, commandLineParser); 342 case Report: 343 return report(argc, argv, commandLineParser); 344 } 345 return 0; 346 } 347 348 int CodeCoverageTool::show(int argc, const char **argv, 349 CommandLineParserType commandLineParser) { 350 351 cl::OptionCategory ViewCategory("Viewing options"); 352 353 cl::opt<bool> ShowLineExecutionCounts( 354 "show-line-counts", cl::Optional, 355 cl::desc("Show the execution counts for each line"), cl::init(true), 356 cl::cat(ViewCategory)); 357 358 cl::opt<bool> ShowRegions( 359 "show-regions", cl::Optional, 360 cl::desc("Show the execution counts for each region"), 361 cl::cat(ViewCategory)); 362 363 cl::opt<bool> ShowBestLineRegionsCounts( 364 "show-line-counts-or-regions", cl::Optional, 365 cl::desc("Show the execution counts for each line, or the execution " 366 "counts for each region on lines that have multiple regions"), 367 cl::cat(ViewCategory)); 368 369 cl::opt<bool> ShowExpansions("show-expansions", cl::Optional, 370 cl::desc("Show expanded source regions"), 371 cl::cat(ViewCategory)); 372 373 cl::opt<bool> ShowInstantiations("show-instantiations", cl::Optional, 374 cl::desc("Show function instantiations"), 375 cl::cat(ViewCategory)); 376 377 cl::opt<bool> NoColors("no-colors", cl::Optional, 378 cl::desc("Don't show text colors"), cl::init(false), 379 cl::cat(ViewCategory)); 380 381 auto Err = commandLineParser(argc, argv); 382 if (Err) 383 return Err; 384 385 ViewOpts.Colors = !NoColors; 386 ViewOpts.ShowLineNumbers = true; 387 ViewOpts.ShowLineStats = ShowLineExecutionCounts.getNumOccurrences() != 0 || 388 !ShowRegions || ShowBestLineRegionsCounts; 389 ViewOpts.ShowRegionMarkers = ShowRegions || ShowBestLineRegionsCounts; 390 ViewOpts.ShowLineStatsOrRegionMarkers = ShowBestLineRegionsCounts; 391 ViewOpts.ShowExpandedRegions = ShowExpansions; 392 ViewOpts.ShowFunctionInstantiations = ShowInstantiations; 393 394 auto Coverage = load(); 395 if (!Coverage) 396 return 1; 397 398 if (!Filters.empty()) { 399 // Show functions 400 for (const auto &Function : Coverage->getCoveredFunctions()) { 401 if (!Filters.matches(Function)) 402 continue; 403 404 auto mainView = createFunctionView(Function, *Coverage); 405 if (!mainView) { 406 ViewOpts.colored_ostream(outs(), raw_ostream::RED) 407 << "warning: Could not read coverage for '" << Function.Name; 408 outs() << "\n"; 409 continue; 410 } 411 ViewOpts.colored_ostream(outs(), raw_ostream::CYAN) << Function.Name 412 << ":"; 413 outs() << "\n"; 414 mainView->render(outs(), /*WholeFile=*/false); 415 outs() << "\n"; 416 } 417 return 0; 418 } 419 420 // Show files 421 bool ShowFilenames = SourceFiles.size() != 1; 422 423 if (SourceFiles.empty()) 424 // Get the source files from the function coverage mapping 425 for (StringRef Filename : Coverage->getUniqueSourceFiles()) 426 SourceFiles.push_back(Filename); 427 428 for (const auto &SourceFile : SourceFiles) { 429 auto mainView = createSourceFileView(SourceFile, *Coverage); 430 if (!mainView) { 431 ViewOpts.colored_ostream(outs(), raw_ostream::RED) 432 << "warning: The file '" << SourceFile << "' isn't covered."; 433 outs() << "\n"; 434 continue; 435 } 436 437 if (ShowFilenames) { 438 ViewOpts.colored_ostream(outs(), raw_ostream::CYAN) << SourceFile << ":"; 439 outs() << "\n"; 440 } 441 mainView->render(outs(), /*Wholefile=*/true); 442 if (SourceFiles.size() > 1) 443 outs() << "\n"; 444 } 445 446 return 0; 447 } 448 449 int CodeCoverageTool::report(int argc, const char **argv, 450 CommandLineParserType commandLineParser) { 451 cl::opt<bool> NoColors("no-colors", cl::Optional, 452 cl::desc("Don't show text colors"), cl::init(false)); 453 454 auto Err = commandLineParser(argc, argv); 455 if (Err) 456 return Err; 457 458 ViewOpts.Colors = !NoColors; 459 460 auto Coverage = load(); 461 if (!Coverage) 462 return 1; 463 464 CoverageSummary Summarizer; 465 Summarizer.createSummaries(Coverage->getCoveredFunctions()); 466 CoverageReport Report(ViewOpts, Summarizer); 467 if (SourceFiles.empty() && Filters.empty()) { 468 Report.renderFileReports(llvm::outs()); 469 return 0; 470 } 471 472 Report.renderFunctionReports(llvm::outs()); 473 return 0; 474 } 475 476 int show_main(int argc, const char **argv) { 477 CodeCoverageTool Tool; 478 return Tool.run(CodeCoverageTool::Show, argc, argv); 479 } 480 481 int report_main(int argc, const char **argv) { 482 CodeCoverageTool Tool; 483 return Tool.run(CodeCoverageTool::Report, argc, argv); 484 } 485