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 "CoverageFilters.h" 18 #include "CoverageReport.h" 19 #include "CoverageViewOptions.h" 20 #include "SourceCoverageView.h" 21 #include "llvm/ADT/SmallString.h" 22 #include "llvm/ADT/StringRef.h" 23 #include "llvm/ADT/Triple.h" 24 #include "llvm/ProfileData/CoverageMapping.h" 25 #include "llvm/ProfileData/InstrProfReader.h" 26 #include "llvm/Support/CommandLine.h" 27 #include "llvm/Support/FileSystem.h" 28 #include "llvm/Support/Format.h" 29 #include "llvm/Support/ManagedStatic.h" 30 #include "llvm/Support/Path.h" 31 #include "llvm/Support/PrettyStackTrace.h" 32 #include "llvm/Support/Process.h" 33 #include "llvm/Support/Signals.h" 34 #include <functional> 35 #include <system_error> 36 37 using namespace llvm; 38 using namespace coverage; 39 40 namespace { 41 /// \brief The implementation of the coverage tool. 42 class CodeCoverageTool { 43 public: 44 enum Command { 45 /// \brief The show command. 46 Show, 47 /// \brief The report command. 48 Report 49 }; 50 51 /// \brief Print the error message to the error output stream. 52 void error(const Twine &Message, StringRef Whence = ""); 53 54 /// \brief Return a memory buffer for the given source file. 55 ErrorOr<const MemoryBuffer &> getSourceFile(StringRef SourceFile); 56 57 /// \brief Create source views for the expansions of the view. 58 void attachExpansionSubViews(SourceCoverageView &View, 59 ArrayRef<ExpansionRecord> Expansions, 60 CoverageMapping &Coverage); 61 62 /// \brief Create the source view of a particular function. 63 std::unique_ptr<SourceCoverageView> 64 createFunctionView(const FunctionRecord &Function, CoverageMapping &Coverage); 65 66 /// \brief Create the main source view of a particular source file. 67 std::unique_ptr<SourceCoverageView> 68 createSourceFileView(StringRef SourceFile, CoverageMapping &Coverage); 69 70 /// \brief Load the coverage mapping data. Return true if an error occured. 71 std::unique_ptr<CoverageMapping> load(); 72 73 int run(Command Cmd, int argc, const char **argv); 74 75 typedef std::function<int(int, const char **)> CommandLineParserType; 76 77 int show(int argc, const char **argv, 78 CommandLineParserType commandLineParser); 79 80 int report(int argc, const char **argv, 81 CommandLineParserType commandLineParser); 82 83 std::string ObjectFilename; 84 CoverageViewOptions ViewOpts; 85 std::string PGOFilename; 86 CoverageFiltersMatchAll Filters; 87 std::vector<std::string> SourceFiles; 88 std::vector<std::pair<std::string, std::unique_ptr<MemoryBuffer>>> 89 LoadedSourceFiles; 90 bool CompareFilenamesOnly; 91 StringMap<std::string> RemappedFilenames; 92 llvm::Triple::ArchType CoverageArch; 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 CoverageArch); 201 if (std::error_code EC = CoverageOrErr.getError()) { 202 colored_ostream(errs(), raw_ostream::RED) 203 << "error: Failed to load coverage: " << EC.message(); 204 errs() << "\n"; 205 return nullptr; 206 } 207 auto Coverage = std::move(CoverageOrErr.get()); 208 unsigned Mismatched = Coverage->getMismatchedCount(); 209 if (Mismatched) { 210 colored_ostream(errs(), raw_ostream::RED) 211 << "warning: " << Mismatched << " functions have mismatched data. "; 212 errs() << "\n"; 213 } 214 215 if (CompareFilenamesOnly) { 216 auto CoveredFiles = Coverage.get()->getUniqueSourceFiles(); 217 for (auto &SF : SourceFiles) { 218 StringRef SFBase = sys::path::filename(SF); 219 for (const auto &CF : CoveredFiles) 220 if (SFBase == sys::path::filename(CF)) { 221 RemappedFilenames[CF] = SF; 222 SF = CF; 223 break; 224 } 225 } 226 } 227 228 return Coverage; 229 } 230 231 namespace { 232 enum Colors { Auto, Always, Never }; 233 } 234 235 int CodeCoverageTool::run(Command Cmd, int argc, const char **argv) { 236 // Print a stack trace if we signal out. 237 sys::PrintStackTraceOnErrorSignal(); 238 PrettyStackTraceProgram X(argc, argv); 239 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. 240 241 cl::opt<std::string, true> ObjectFilename( 242 cl::Positional, cl::Required, cl::location(this->ObjectFilename), 243 cl::desc("Covered executable or object file.")); 244 245 cl::list<std::string> InputSourceFiles( 246 cl::Positional, cl::desc("<Source files>"), cl::ZeroOrMore); 247 248 cl::opt<std::string, true> PGOFilename( 249 "instr-profile", cl::Required, cl::location(this->PGOFilename), 250 cl::desc( 251 "File with the profile data obtained after an instrumented run")); 252 253 cl::opt<std::string> Arch( 254 "arch", cl::desc("architecture of the coverage mapping binary")); 255 256 cl::opt<bool> DebugDump("dump", cl::Optional, 257 cl::desc("Show internal debug dump")); 258 259 cl::opt<bool> FilenameEquivalence( 260 "filename-equivalence", cl::Optional, 261 cl::desc("Treat source files as equivalent to paths in the coverage data " 262 "when the file names match, even if the full paths do not")); 263 264 cl::OptionCategory FilteringCategory("Function filtering options"); 265 266 cl::list<std::string> NameFilters( 267 "name", cl::Optional, 268 cl::desc("Show code coverage only for functions with the given name"), 269 cl::ZeroOrMore, cl::cat(FilteringCategory)); 270 271 cl::list<std::string> NameRegexFilters( 272 "name-regex", cl::Optional, 273 cl::desc("Show code coverage only for functions that match the given " 274 "regular expression"), 275 cl::ZeroOrMore, cl::cat(FilteringCategory)); 276 277 cl::opt<double> RegionCoverageLtFilter( 278 "region-coverage-lt", cl::Optional, 279 cl::desc("Show code coverage only for functions with region coverage " 280 "less than the given threshold"), 281 cl::cat(FilteringCategory)); 282 283 cl::opt<double> RegionCoverageGtFilter( 284 "region-coverage-gt", cl::Optional, 285 cl::desc("Show code coverage only for functions with region coverage " 286 "greater than the given threshold"), 287 cl::cat(FilteringCategory)); 288 289 cl::opt<double> LineCoverageLtFilter( 290 "line-coverage-lt", cl::Optional, 291 cl::desc("Show code coverage only for functions with line coverage less " 292 "than the given threshold"), 293 cl::cat(FilteringCategory)); 294 295 cl::opt<double> LineCoverageGtFilter( 296 "line-coverage-gt", cl::Optional, 297 cl::desc("Show code coverage only for functions with line coverage " 298 "greater than the given threshold"), 299 cl::cat(FilteringCategory)); 300 301 cl::opt<Colors> Color( 302 "color", cl::desc("Configure color output:"), cl::init(Colors::Auto), 303 cl::values(clEnumValN(Colors::Auto, "auto", 304 "Enable color if stdout seems to support it"), 305 clEnumValN(Colors::Always, "always", "Enable color"), 306 clEnumValN(Colors::Never, "never", "Disable color"), 307 clEnumValEnd)); 308 309 auto commandLineParser = [&, this](int argc, const char **argv) -> int { 310 cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n"); 311 ViewOpts.Debug = DebugDump; 312 CompareFilenamesOnly = FilenameEquivalence; 313 314 ViewOpts.Colors = 315 Color == Colors::Always || 316 (Color == Colors::Auto && sys::Process::StandardOutHasColors()); 317 318 // Create the function filters 319 if (!NameFilters.empty() || !NameRegexFilters.empty()) { 320 auto NameFilterer = new CoverageFilters; 321 for (const auto &Name : NameFilters) 322 NameFilterer->push_back(llvm::make_unique<NameCoverageFilter>(Name)); 323 for (const auto &Regex : NameRegexFilters) 324 NameFilterer->push_back( 325 llvm::make_unique<NameRegexCoverageFilter>(Regex)); 326 Filters.push_back(std::unique_ptr<CoverageFilter>(NameFilterer)); 327 } 328 if (RegionCoverageLtFilter.getNumOccurrences() || 329 RegionCoverageGtFilter.getNumOccurrences() || 330 LineCoverageLtFilter.getNumOccurrences() || 331 LineCoverageGtFilter.getNumOccurrences()) { 332 auto StatFilterer = new CoverageFilters; 333 if (RegionCoverageLtFilter.getNumOccurrences()) 334 StatFilterer->push_back(llvm::make_unique<RegionCoverageFilter>( 335 RegionCoverageFilter::LessThan, RegionCoverageLtFilter)); 336 if (RegionCoverageGtFilter.getNumOccurrences()) 337 StatFilterer->push_back(llvm::make_unique<RegionCoverageFilter>( 338 RegionCoverageFilter::GreaterThan, RegionCoverageGtFilter)); 339 if (LineCoverageLtFilter.getNumOccurrences()) 340 StatFilterer->push_back(llvm::make_unique<LineCoverageFilter>( 341 LineCoverageFilter::LessThan, LineCoverageLtFilter)); 342 if (LineCoverageGtFilter.getNumOccurrences()) 343 StatFilterer->push_back(llvm::make_unique<LineCoverageFilter>( 344 RegionCoverageFilter::GreaterThan, LineCoverageGtFilter)); 345 Filters.push_back(std::unique_ptr<CoverageFilter>(StatFilterer)); 346 } 347 348 if (Arch.empty()) 349 CoverageArch = llvm::Triple::ArchType::UnknownArch; 350 else { 351 CoverageArch = Triple(Arch).getArch(); 352 if (CoverageArch == llvm::Triple::ArchType::UnknownArch) { 353 errs() << "error: Unknown architecture: " << Arch << "\n"; 354 return 1; 355 } 356 } 357 358 for (const auto &File : InputSourceFiles) { 359 SmallString<128> Path(File); 360 if (!CompareFilenamesOnly) 361 if (std::error_code EC = sys::fs::make_absolute(Path)) { 362 errs() << "error: " << File << ": " << EC.message(); 363 return 1; 364 } 365 SourceFiles.push_back(Path.str()); 366 } 367 return 0; 368 }; 369 370 switch (Cmd) { 371 case Show: 372 return show(argc, argv, commandLineParser); 373 case Report: 374 return report(argc, argv, commandLineParser); 375 } 376 return 0; 377 } 378 379 int CodeCoverageTool::show(int argc, const char **argv, 380 CommandLineParserType commandLineParser) { 381 382 cl::OptionCategory ViewCategory("Viewing options"); 383 384 cl::opt<bool> ShowLineExecutionCounts( 385 "show-line-counts", cl::Optional, 386 cl::desc("Show the execution counts for each line"), cl::init(true), 387 cl::cat(ViewCategory)); 388 389 cl::opt<bool> ShowRegions( 390 "show-regions", cl::Optional, 391 cl::desc("Show the execution counts for each region"), 392 cl::cat(ViewCategory)); 393 394 cl::opt<bool> ShowBestLineRegionsCounts( 395 "show-line-counts-or-regions", cl::Optional, 396 cl::desc("Show the execution counts for each line, or the execution " 397 "counts for each region on lines that have multiple regions"), 398 cl::cat(ViewCategory)); 399 400 cl::opt<bool> ShowExpansions("show-expansions", cl::Optional, 401 cl::desc("Show expanded source regions"), 402 cl::cat(ViewCategory)); 403 404 cl::opt<bool> ShowInstantiations("show-instantiations", cl::Optional, 405 cl::desc("Show function instantiations"), 406 cl::cat(ViewCategory)); 407 408 auto Err = commandLineParser(argc, argv); 409 if (Err) 410 return Err; 411 412 ViewOpts.ShowLineNumbers = true; 413 ViewOpts.ShowLineStats = ShowLineExecutionCounts.getNumOccurrences() != 0 || 414 !ShowRegions || ShowBestLineRegionsCounts; 415 ViewOpts.ShowRegionMarkers = ShowRegions || ShowBestLineRegionsCounts; 416 ViewOpts.ShowLineStatsOrRegionMarkers = ShowBestLineRegionsCounts; 417 ViewOpts.ShowExpandedRegions = ShowExpansions; 418 ViewOpts.ShowFunctionInstantiations = ShowInstantiations; 419 420 auto Coverage = load(); 421 if (!Coverage) 422 return 1; 423 424 if (!Filters.empty()) { 425 // Show functions 426 for (const auto &Function : Coverage->getCoveredFunctions()) { 427 if (!Filters.matches(Function)) 428 continue; 429 430 auto mainView = createFunctionView(Function, *Coverage); 431 if (!mainView) { 432 ViewOpts.colored_ostream(outs(), raw_ostream::RED) 433 << "warning: Could not read coverage for '" << Function.Name; 434 outs() << "\n"; 435 continue; 436 } 437 ViewOpts.colored_ostream(outs(), raw_ostream::CYAN) << Function.Name 438 << ":"; 439 outs() << "\n"; 440 mainView->render(outs(), /*WholeFile=*/false); 441 outs() << "\n"; 442 } 443 return 0; 444 } 445 446 // Show files 447 bool ShowFilenames = SourceFiles.size() != 1; 448 449 if (SourceFiles.empty()) 450 // Get the source files from the function coverage mapping 451 for (StringRef Filename : Coverage->getUniqueSourceFiles()) 452 SourceFiles.push_back(Filename); 453 454 for (const auto &SourceFile : SourceFiles) { 455 auto mainView = createSourceFileView(SourceFile, *Coverage); 456 if (!mainView) { 457 ViewOpts.colored_ostream(outs(), raw_ostream::RED) 458 << "warning: The file '" << SourceFile << "' isn't covered."; 459 outs() << "\n"; 460 continue; 461 } 462 463 if (ShowFilenames) { 464 ViewOpts.colored_ostream(outs(), raw_ostream::CYAN) << SourceFile << ":"; 465 outs() << "\n"; 466 } 467 mainView->render(outs(), /*Wholefile=*/true); 468 if (SourceFiles.size() > 1) 469 outs() << "\n"; 470 } 471 472 return 0; 473 } 474 475 int CodeCoverageTool::report(int argc, const char **argv, 476 CommandLineParserType commandLineParser) { 477 auto Err = commandLineParser(argc, argv); 478 if (Err) 479 return Err; 480 481 auto Coverage = load(); 482 if (!Coverage) 483 return 1; 484 485 CoverageReport Report(ViewOpts, std::move(Coverage)); 486 if (SourceFiles.empty()) 487 Report.renderFileReports(llvm::outs()); 488 else 489 Report.renderFunctionReports(SourceFiles, llvm::outs()); 490 return 0; 491 } 492 493 int showMain(int argc, const char *argv[]) { 494 CodeCoverageTool Tool; 495 return Tool.run(CodeCoverageTool::Show, argc, argv); 496 } 497 498 int reportMain(int argc, const char *argv[]) { 499 CodeCoverageTool Tool; 500 return Tool.run(CodeCoverageTool::Report, argc, argv); 501 } 502