tools/llvm-cov/CodeCoverage.cpp

   1 //===- CodeCoverage.cpp - Coverage tool based on profiling instrumentation-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // The 'CodeCoverageTool' class implements a command line tool to analyze and
  10 // report coverage information using the profiling instrumentation and code
  11 // coverage mapping.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "CoverageExporterJson.h"
  16 #include "CoverageExporterLcov.h"
  17 #include "CoverageFilters.h"
  18 #include "CoverageReport.h"
  19 #include "CoverageSummaryInfo.h"
  20 #include "CoverageViewOptions.h"
  21 #include "RenderingSupport.h"
  22 #include "SourceCoverageView.h"
  23 #include "llvm/ADT/SmallString.h"
  24 #include "llvm/ADT/StringRef.h"
  25 #include "llvm/ADT/Triple.h"
  26 #include "llvm/ProfileData/Coverage/CoverageMapping.h"
  27 #include "llvm/ProfileData/InstrProfReader.h"
  28 #include "llvm/Support/CommandLine.h"
  29 #include "llvm/Support/FileSystem.h"
  30 #include "llvm/Support/Format.h"
  31 #include "llvm/Support/MemoryBuffer.h"
  32 #include "llvm/Support/Path.h"
  33 #include "llvm/Support/Process.h"
  34 #include "llvm/Support/Program.h"
  35 #include "llvm/Support/ScopedPrinter.h"
  36 #include "llvm/Support/ThreadPool.h"
  37 #include "llvm/Support/Threading.h"
  38 #include "llvm/Support/ToolOutputFile.h"
  39
  40 #include <functional>
  41 #include <map>
  42 #include <system_error>
  43
  44 using namespace llvm;
  45 using namespace coverage;
  46
  47 void exportCoverageDataToJson(const coverage::CoverageMapping &CoverageMapping,
  48                               const CoverageViewOptions &Options,
  49                               raw_ostream &OS);
  50
  51 namespace {
  52 /// The implementation of the coverage tool.
  53 class CodeCoverageTool {
  54 public:
  55   enum Command {
  56     /// The show command.
  57     Show,
  58     /// The report command.
  59     Report,
  60     /// The export command.
  61     Export
  62   };
  63
  64   int run(Command Cmd, int argc, const char **argv);
  65
  66 private:
  67   /// Print the error message to the error output stream.
  68   void error(const Twine &Message, StringRef Whence = "");
  69
  70   /// Print the warning message to the error output stream.
  71   void warning(const Twine &Message, StringRef Whence = "");
  72
  73   /// Convert \p Path into an absolute path and append it to the list
  74   /// of collected paths.
  75   void addCollectedPath(const std::string &Path);
  76
  77   /// If \p Path is a regular file, collect the path. If it's a
  78   /// directory, recursively collect all of the paths within the directory.
  79   void collectPaths(const std::string &Path);
  80
  81   /// Return a memory buffer for the given source file.
  82   ErrorOr<const MemoryBuffer &> getSourceFile(StringRef SourceFile);
  83
  84   /// Create source views for the expansions of the view.
  85   void attachExpansionSubViews(SourceCoverageView &View,
  86                                ArrayRef<ExpansionRecord> Expansions,
  87                                const CoverageMapping &Coverage);
  88
  89   /// Create the source view of a particular function.
  90   std::unique_ptr<SourceCoverageView>
  91   createFunctionView(const FunctionRecord &Function,
  92                      const CoverageMapping &Coverage);
  93
  94   /// Create the main source view of a particular source file.
  95   std::unique_ptr<SourceCoverageView>
  96   createSourceFileView(StringRef SourceFile, const CoverageMapping &Coverage);
  97
  98   /// Load the coverage mapping data. Return nullptr if an error occurred.
  99   std::unique_ptr<CoverageMapping> load();
 100
 101   /// Create a mapping from files in the Coverage data to local copies
 102   /// (path-equivalence).
 103   void remapPathNames(const CoverageMapping &Coverage);
 104
 105   /// Remove input source files which aren't mapped by \p Coverage.
 106   void removeUnmappedInputs(const CoverageMapping &Coverage);
 107
 108   /// If a demangler is available, demangle all symbol names.
 109   void demangleSymbols(const CoverageMapping &Coverage);
 110
 111   /// Write out a source file view to the filesystem.
 112   void writeSourceFileView(StringRef SourceFile, CoverageMapping *Coverage,
 113                            CoveragePrinter *Printer, bool ShowFilenames);
 114
 115   typedef llvm::function_ref<int(int, const char **)> CommandLineParserType;
 116
 117   int doShow(int argc, const char **argv,
 118              CommandLineParserType commandLineParser);
 119
 120   int doReport(int argc, const char **argv,
 121                CommandLineParserType commandLineParser);
 122
 123   int doExport(int argc, const char **argv,
 124                CommandLineParserType commandLineParser);
 125
 126   std::vector<StringRef> ObjectFilenames;
 127   CoverageViewOptions ViewOpts;
 128   CoverageFiltersMatchAll Filters;
 129   CoverageFilters IgnoreFilenameFilters;
 130
 131   /// The path to the indexed profile.
 132   std::string PGOFilename;
 133
 134   /// A list of input source files.
 135   std::vector<std::string> SourceFiles;
 136
 137   /// In -path-equivalence mode, this maps the absolute paths from the coverage
 138   /// mapping data to the input source files.
 139   StringMap<std::string> RemappedFilenames;
 140
 141   /// The coverage data path to be remapped from, and the source path to be
 142   /// remapped to, when using -path-equivalence.
 143   Optional<std::pair<std::string, std::string>> PathRemapping;
 144
 145   /// The architecture the coverage mapping data targets.
 146   std::vector<StringRef> CoverageArches;
 147
 148   /// A cache for demangled symbols.
 149   DemangleCache DC;
 150
 151   /// A lock which guards printing to stderr.
 152   std::mutex ErrsLock;
 153
 154   /// A container for input source file buffers.
 155   std::mutex LoadedSourceFilesLock;
 156   std::vector<std::pair<std::string, std::unique_ptr<MemoryBuffer>>>
 157       LoadedSourceFiles;
 158
 159   /// Whitelist from -name-whitelist to be used for filtering.
 160   std::unique_ptr<SpecialCaseList> NameWhitelist;
 161 };
 162 }
 163
 164 static std::string getErrorString(const Twine &Message, StringRef Whence,
 165                                   bool Warning) {
 166   std::string Str = (Warning ? "warning" : "error");
 167   Str += ": ";
 168   if (!Whence.empty())
 169     Str += Whence.str() + ": ";
 170   Str += Message.str() + "\n";
 171   return Str;
 172 }
 173
 174 void CodeCoverageTool::error(const Twine &Message, StringRef Whence) {
 175   std::unique_lock<std::mutex> Guard{ErrsLock};
 176   ViewOpts.colored_ostream(errs(), raw_ostream::RED)
 177       << getErrorString(Message, Whence, false);
 178 }
 179
 180 void CodeCoverageTool::warning(const Twine &Message, StringRef Whence) {
 181   std::unique_lock<std::mutex> Guard{ErrsLock};
 182   ViewOpts.colored_ostream(errs(), raw_ostream::RED)
 183       << getErrorString(Message, Whence, true);
 184 }
 185
 186 void CodeCoverageTool::addCollectedPath(const std::string &Path) {
 187   SmallString<128> EffectivePath(Path);
 188   if (std::error_code EC = sys::fs::make_absolute(EffectivePath)) {
 189     error(EC.message(), Path);
 190     return;
 191   }
 192   sys::path::remove_dots(EffectivePath, /*remove_dot_dots=*/true);
 193   if (!IgnoreFilenameFilters.matchesFilename(EffectivePath))
 194     SourceFiles.emplace_back(EffectivePath.str());
 195 }
 196
 197 void CodeCoverageTool::collectPaths(const std::string &Path) {
 198   llvm::sys::fs::file_status Status;
 199   llvm::sys::fs::status(Path, Status);
 200   if (!llvm::sys::fs::exists(Status)) {
 201     if (PathRemapping)
 202       addCollectedPath(Path);
 203     else
 204       warning("Source file doesn't exist, proceeded by ignoring it.", Path);
 205     return;
 206   }
 207
 208   if (llvm::sys::fs::is_regular_file(Status)) {
 209     addCollectedPath(Path);
 210     return;
 211   }
 212
 213   if (llvm::sys::fs::is_directory(Status)) {
 214     std::error_code EC;
 215     for (llvm::sys::fs::recursive_directory_iterator F(Path, EC), E;
 216          F != E; F.increment(EC)) {
 217
 218       auto Status = F->status();
 219       if (!Status) {
 220         warning(Status.getError().message(), F->path());
 221         continue;
 222       }
 223
 224       if (Status->type() == llvm::sys::fs::file_type::regular_file)
 225         addCollectedPath(F->path());
 226     }
 227   }
 228 }
 229
 230 ErrorOr<const MemoryBuffer &>
 231 CodeCoverageTool::getSourceFile(StringRef SourceFile) {
 232   // If we've remapped filenames, look up the real location for this file.
 233   std::unique_lock<std::mutex> Guard{LoadedSourceFilesLock};
 234   if (!RemappedFilenames.empty()) {
 235     auto Loc = RemappedFilenames.find(SourceFile);
 236     if (Loc != RemappedFilenames.end())
 237       SourceFile = Loc->second;
 238   }
 239   for (const auto &Files : LoadedSourceFiles)
 240     if (sys::fs::equivalent(SourceFile, Files.first))
 241       return *Files.second;
 242   auto Buffer = MemoryBuffer::getFile(SourceFile);
 243   if (auto EC = Buffer.getError()) {
 244     error(EC.message(), SourceFile);
 245     return EC;
 246   }
 247   LoadedSourceFiles.emplace_back(SourceFile, std::move(Buffer.get()));
 248   return *LoadedSourceFiles.back().second;
 249 }
 250
 251 void CodeCoverageTool::attachExpansionSubViews(
 252     SourceCoverageView &View, ArrayRef<ExpansionRecord> Expansions,
 253     const CoverageMapping &Coverage) {
 254   if (!ViewOpts.ShowExpandedRegions)
 255     return;
 256   for (const auto &Expansion : Expansions) {
 257     auto ExpansionCoverage = Coverage.getCoverageForExpansion(Expansion);
 258     if (ExpansionCoverage.empty())
 259       continue;
 260     auto SourceBuffer = getSourceFile(ExpansionCoverage.getFilename());
 261     if (!SourceBuffer)
 262       continue;
 263
 264     auto SubViewExpansions = ExpansionCoverage.getExpansions();
 265     auto SubView =
 266         SourceCoverageView::create(Expansion.Function.Name, SourceBuffer.get(),
 267                                    ViewOpts, std::move(ExpansionCoverage));
 268     attachExpansionSubViews(*SubView, SubViewExpansions, Coverage);
 269     View.addExpansion(Expansion.Region, std::move(SubView));
 270   }
 271 }
 272
 273 std::unique_ptr<SourceCoverageView>
 274 CodeCoverageTool::createFunctionView(const FunctionRecord &Function,
 275                                      const CoverageMapping &Coverage) {
 276   auto FunctionCoverage = Coverage.getCoverageForFunction(Function);
 277   if (FunctionCoverage.empty())
 278     return nullptr;
 279   auto SourceBuffer = getSourceFile(FunctionCoverage.getFilename());
 280   if (!SourceBuffer)
 281     return nullptr;
 282
 283   auto Expansions = FunctionCoverage.getExpansions();
 284   auto View = SourceCoverageView::create(DC.demangle(Function.Name),
 285                                          SourceBuffer.get(), ViewOpts,
 286                                          std::move(FunctionCoverage));
 287   attachExpansionSubViews(*View, Expansions, Coverage);
 288
 289   return View;
 290 }
 291
 292 std::unique_ptr<SourceCoverageView>
 293 CodeCoverageTool::createSourceFileView(StringRef SourceFile,
 294                                        const CoverageMapping &Coverage) {
 295   auto SourceBuffer = getSourceFile(SourceFile);
 296   if (!SourceBuffer)
 297     return nullptr;
 298   auto FileCoverage = Coverage.getCoverageForFile(SourceFile);
 299   if (FileCoverage.empty())
 300     return nullptr;
 301
 302   auto Expansions = FileCoverage.getExpansions();
 303   auto View = SourceCoverageView::create(SourceFile, SourceBuffer.get(),
 304                                          ViewOpts, std::move(FileCoverage));
 305   attachExpansionSubViews(*View, Expansions, Coverage);
 306   if (!ViewOpts.ShowFunctionInstantiations)
 307     return View;
 308
 309   for (const auto &Group : Coverage.getInstantiationGroups(SourceFile)) {
 310     // Skip functions which have a single instantiation.
 311     if (Group.size() < 2)
 312       continue;
 313
 314     for (const FunctionRecord *Function : Group.getInstantiations()) {
 315       std::unique_ptr<SourceCoverageView> SubView{nullptr};
 316
 317       StringRef Funcname = DC.demangle(Function->Name);
 318
 319       if (Function->ExecutionCount > 0) {
 320         auto SubViewCoverage = Coverage.getCoverageForFunction(*Function);
 321         auto SubViewExpansions = SubViewCoverage.getExpansions();
 322         SubView = SourceCoverageView::create(
 323             Funcname, SourceBuffer.get(), ViewOpts, std::move(SubViewCoverage));
 324         attachExpansionSubViews(*SubView, SubViewExpansions, Coverage);
 325       }
 326
 327       unsigned FileID = Function->CountedRegions.front().FileID;
 328       unsigned Line = 0;
 329       for (const auto &CR : Function->CountedRegions)
 330         if (CR.FileID == FileID)
 331           Line = std::max(CR.LineEnd, Line);
 332       View->addInstantiation(Funcname, Line, std::move(SubView));
 333     }
 334   }
 335   return View;
 336 }
 337
 338 static bool modifiedTimeGT(StringRef LHS, StringRef RHS) {
 339   sys::fs::file_status Status;
 340   if (sys::fs::status(LHS, Status))
 341     return false;
 342   auto LHSTime = Status.getLastModificationTime();
 343   if (sys::fs::status(RHS, Status))
 344     return false;
 345   auto RHSTime = Status.getLastModificationTime();
 346   return LHSTime > RHSTime;
 347 }
 348
 349 std::unique_ptr<CoverageMapping> CodeCoverageTool::load() {
 350   for (StringRef ObjectFilename : ObjectFilenames)
 351     if (modifiedTimeGT(ObjectFilename, PGOFilename))
 352       warning("profile data may be out of date - object is newer",
 353               ObjectFilename);
 354   auto CoverageOrErr =
 355       CoverageMapping::load(ObjectFilenames, PGOFilename, CoverageArches);
 356   if (Error E = CoverageOrErr.takeError()) {
 357     error("Failed to load coverage: " + toString(std::move(E)),
 358           join(ObjectFilenames.begin(), ObjectFilenames.end(), ", "));
 359     return nullptr;
 360   }
 361   auto Coverage = std::move(CoverageOrErr.get());
 362   unsigned Mismatched = Coverage->getMismatchedCount();
 363   if (Mismatched) {
 364     warning(Twine(Mismatched) + " functions have mismatched data");
 365
 366     if (ViewOpts.Debug) {
 367       for (const auto &HashMismatch : Coverage->getHashMismatches())
 368         errs() << "hash-mismatch: "
 369                << "No profile record found for '" << HashMismatch.first << "'"
 370                << " with hash = 0x" << Twine::utohexstr(HashMismatch.second)
 371                << '\n';
 372     }
 373   }
 374
 375   remapPathNames(*Coverage);
 376
 377   if (!SourceFiles.empty())
 378     removeUnmappedInputs(*Coverage);
 379
 380   demangleSymbols(*Coverage);
 381
 382   return Coverage;
 383 }
 384
 385 void CodeCoverageTool::remapPathNames(const CoverageMapping &Coverage) {
 386   if (!PathRemapping)
 387     return;
 388
 389   // Convert remapping paths to native paths with trailing seperators.
 390   auto nativeWithTrailing = [](StringRef Path) -> std::string {
 391     if (Path.empty())
 392       return "";
 393     SmallString<128> NativePath;
 394     sys::path::native(Path, NativePath);
 395     if (!sys::path::is_separator(NativePath.back()))
 396       NativePath += sys::path::get_separator();
 397     return NativePath.c_str();
 398   };
 399   std::string RemapFrom = nativeWithTrailing(PathRemapping->first);
 400   std::string RemapTo = nativeWithTrailing(PathRemapping->second);
 401
 402   // Create a mapping from coverage data file paths to local paths.
 403   for (StringRef Filename : Coverage.getUniqueSourceFiles()) {
 404     SmallString<128> NativeFilename;
 405     sys::path::native(Filename, NativeFilename);
 406     if (NativeFilename.startswith(RemapFrom)) {
 407       RemappedFilenames[Filename] =
 408           RemapTo + NativeFilename.substr(RemapFrom.size()).str();
 409     }
 410   }
 411
 412   // Convert input files from local paths to coverage data file paths.
 413   StringMap<std::string> InvRemappedFilenames;
 414   for (const auto &RemappedFilename : RemappedFilenames)
 415     InvRemappedFilenames[RemappedFilename.getValue()] = RemappedFilename.getKey();
 416
 417   for (std::string &Filename : SourceFiles) {
 418     SmallString<128> NativeFilename;
 419     sys::path::native(Filename, NativeFilename);
 420     auto CovFileName = InvRemappedFilenames.find(NativeFilename);
 421     if (CovFileName != InvRemappedFilenames.end())
 422       Filename = CovFileName->second;
 423   }
 424 }
 425
 426 void CodeCoverageTool::removeUnmappedInputs(const CoverageMapping &Coverage) {
 427   std::vector<StringRef> CoveredFiles = Coverage.getUniqueSourceFiles();
 428
 429   auto UncoveredFilesIt = SourceFiles.end();
 430   // The user may have specified source files which aren't in the coverage
 431   // mapping. Filter these files away.
 432   UncoveredFilesIt = std::remove_if(
 433       SourceFiles.begin(), SourceFiles.end(), [&](const std::string &SF) {
 434         return !std::binary_search(CoveredFiles.begin(), CoveredFiles.end(),
 435                                    SF);
 436       });
 437
 438   SourceFiles.erase(UncoveredFilesIt, SourceFiles.end());
 439 }
 440
 441 void CodeCoverageTool::demangleSymbols(const CoverageMapping &Coverage) {
 442   if (!ViewOpts.hasDemangler())
 443     return;
 444
 445   // Pass function names to the demangler in a temporary file.
 446   int InputFD;
 447   SmallString<256> InputPath;
 448   std::error_code EC =
 449       sys::fs::createTemporaryFile("demangle-in", "list", InputFD, InputPath);
 450   if (EC) {
 451     error(InputPath, EC.message());
 452     return;
 453   }
 454   ToolOutputFile InputTOF{InputPath, InputFD};
 455
 456   unsigned NumSymbols = 0;
 457   for (const auto &Function : Coverage.getCoveredFunctions()) {
 458     InputTOF.os() << Function.Name << '\n';
 459     ++NumSymbols;
 460   }
 461   InputTOF.os().close();
 462
 463   // Use another temporary file to store the demangler's output.
 464   int OutputFD;
 465   SmallString<256> OutputPath;
 466   EC = sys::fs::createTemporaryFile("demangle-out", "list", OutputFD,
 467                                     OutputPath);
 468   if (EC) {
 469     error(OutputPath, EC.message());
 470     return;
 471   }
 472   ToolOutputFile OutputTOF{OutputPath, OutputFD};
 473   OutputTOF.os().close();
 474
 475   // Invoke the demangler.
 476   std::vector<StringRef> ArgsV;
 477   for (StringRef Arg : ViewOpts.DemanglerOpts)
 478     ArgsV.push_back(Arg);
 479   Optional<StringRef> Redirects[] = {InputPath.str(), OutputPath.str(), {""}};
 480   std::string ErrMsg;
 481   int RC = sys::ExecuteAndWait(ViewOpts.DemanglerOpts[0], ArgsV,
 482                                /*env=*/None, Redirects, /*secondsToWait=*/0,
 483                                /*memoryLimit=*/0, &ErrMsg);
 484   if (RC) {
 485     error(ErrMsg, ViewOpts.DemanglerOpts[0]);
 486     return;
 487   }
 488
 489   // Parse the demangler's output.
 490   auto BufOrError = MemoryBuffer::getFile(OutputPath);
 491   if (!BufOrError) {
 492     error(OutputPath, BufOrError.getError().message());
 493     return;
 494   }
 495
 496   std::unique_ptr<MemoryBuffer> DemanglerBuf = std::move(*BufOrError);
 497
 498   SmallVector<StringRef, 8> Symbols;
 499   StringRef DemanglerData = DemanglerBuf->getBuffer();
 500   DemanglerData.split(Symbols, '\n', /*MaxSplit=*/NumSymbols,
 501                       /*KeepEmpty=*/false);
 502   if (Symbols.size() != NumSymbols) {
 503     error("Demangler did not provide expected number of symbols");
 504     return;
 505   }
 506
 507   // Cache the demangled names.
 508   unsigned I = 0;
 509   for (const auto &Function : Coverage.getCoveredFunctions())
 510     // On Windows, lines in the demangler's output file end with "\r\n".
 511     // Splitting by '\n' keeps '\r's, so cut them now.
 512     DC.DemangledNames[Function.Name] = Symbols[I++].rtrim();
 513 }
 514
 515 void CodeCoverageTool::writeSourceFileView(StringRef SourceFile,
 516                                            CoverageMapping *Coverage,
 517                                            CoveragePrinter *Printer,
 518                                            bool ShowFilenames) {
 519   auto View = createSourceFileView(SourceFile, *Coverage);
 520   if (!View) {
 521     warning("The file '" + SourceFile + "' isn't covered.");
 522     return;
 523   }
 524
 525   auto OSOrErr = Printer->createViewFile(SourceFile, /*InToplevel=*/false);
 526   if (Error E = OSOrErr.takeError()) {
 527     error("Could not create view file!", toString(std::move(E)));
 528     return;
 529   }
 530   auto OS = std::move(OSOrErr.get());
 531
 532   View->print(*OS.get(), /*Wholefile=*/true,
 533               /*ShowSourceName=*/ShowFilenames,
 534               /*ShowTitle=*/ViewOpts.hasOutputDirectory());
 535   Printer->closeViewFile(std::move(OS));
 536 }
 537
 538 int CodeCoverageTool::run(Command Cmd, int argc, const char **argv) {
 539   cl::opt<std::string> CovFilename(
 540       cl::Positional, cl::desc("Covered executable or object file."));
 541
 542   cl::list<std::string> CovFilenames(
 543       "object", cl::desc("Coverage executable or object file"), cl::ZeroOrMore,
 544       cl::CommaSeparated);
 545
 546   cl::list<std::string> InputSourceFiles(
 547       cl::Positional, cl::desc("<Source files>"), cl::ZeroOrMore);
 548
 549   cl::opt<bool> DebugDumpCollectedPaths(
 550       "dump-collected-paths", cl::Optional, cl::Hidden,
 551       cl::desc("Show the collected paths to source files"));
 552
 553   cl::opt<std::string, true> PGOFilename(
 554       "instr-profile", cl::Required, cl::location(this->PGOFilename),
 555       cl::desc(
 556           "File with the profile data obtained after an instrumented run"));
 557
 558   cl::list<std::string> Arches(
 559       "arch", cl::desc("architectures of the coverage mapping binaries"));
 560
 561   cl::opt<bool> DebugDump("dump", cl::Optional,
 562                           cl::desc("Show internal debug dump"));
 563
 564   cl::opt<CoverageViewOptions::OutputFormat> Format(
 565       "format", cl::desc("Output format for line-based coverage reports"),
 566       cl::values(clEnumValN(CoverageViewOptions::OutputFormat::Text, "text",
 567                             "Text output"),
 568                  clEnumValN(CoverageViewOptions::OutputFormat::HTML, "html",
 569                             "HTML output"),
 570                  clEnumValN(CoverageViewOptions::OutputFormat::Lcov, "lcov",
 571                             "lcov tracefile output")),
 572       cl::init(CoverageViewOptions::OutputFormat::Text));
 573
 574   cl::opt<std::string> PathRemap(
 575       "path-equivalence", cl::Optional,
 576       cl::desc("<from>,<to> Map coverage data paths to local source file "
 577                "paths"));
 578
 579   cl::OptionCategory FilteringCategory("Function filtering options");
 580
 581   cl::list<std::string> NameFilters(
 582       "name", cl::Optional,
 583       cl::desc("Show code coverage only for functions with the given name"),
 584       cl::ZeroOrMore, cl::cat(FilteringCategory));
 585
 586   cl::list<std::string> NameFilterFiles(
 587       "name-whitelist", cl::Optional,
 588       cl::desc("Show code coverage only for functions listed in the given "
 589                "file"),
 590       cl::ZeroOrMore, cl::cat(FilteringCategory));
 591
 592   cl::list<std::string> NameRegexFilters(
 593       "name-regex", cl::Optional,
 594       cl::desc("Show code coverage only for functions that match the given "
 595                "regular expression"),
 596       cl::ZeroOrMore, cl::cat(FilteringCategory));
 597
 598   cl::list<std::string> IgnoreFilenameRegexFilters(
 599       "ignore-filename-regex", cl::Optional,
 600       cl::desc("Skip source code files with file paths that match the given "
 601                "regular expression"),
 602       cl::ZeroOrMore, cl::cat(FilteringCategory));
 603
 604   cl::opt<double> RegionCoverageLtFilter(
 605       "region-coverage-lt", cl::Optional,
 606       cl::desc("Show code coverage only for functions with region coverage "
 607                "less than the given threshold"),
 608       cl::cat(FilteringCategory));
 609
 610   cl::opt<double> RegionCoverageGtFilter(
 611       "region-coverage-gt", cl::Optional,
 612       cl::desc("Show code coverage only for functions with region coverage "
 613                "greater than the given threshold"),
 614       cl::cat(FilteringCategory));
 615
 616   cl::opt<double> LineCoverageLtFilter(
 617       "line-coverage-lt", cl::Optional,
 618       cl::desc("Show code coverage only for functions with line coverage less "
 619                "than the given threshold"),
 620       cl::cat(FilteringCategory));
 621
 622   cl::opt<double> LineCoverageGtFilter(
 623       "line-coverage-gt", cl::Optional,
 624       cl::desc("Show code coverage only for functions with line coverage "
 625                "greater than the given threshold"),
 626       cl::cat(FilteringCategory));
 627
 628   cl::opt<cl::boolOrDefault> UseColor(
 629       "use-color", cl::desc("Emit colored output (default=autodetect)"),
 630       cl::init(cl::BOU_UNSET));
 631
 632   cl::list<std::string> DemanglerOpts(
 633       "Xdemangler", cl::desc("<demangler-path>|<demangler-option>"));
 634
 635   cl::opt<bool> RegionSummary(
 636       "show-region-summary", cl::Optional,
 637       cl::desc("Show region statistics in summary table"),
 638       cl::init(true));
 639
 640   cl::opt<bool> InstantiationSummary(
 641       "show-instantiation-summary", cl::Optional,
 642       cl::desc("Show instantiation statistics in summary table"));
 643
 644   cl::opt<bool> SummaryOnly(
 645       "summary-only", cl::Optional,
 646       cl::desc("Export only summary information for each source file"));
 647
 648   cl::opt<unsigned> NumThreads(
 649       "num-threads", cl::init(0),
 650       cl::desc("Number of merge threads to use (default: autodetect)"));
 651   cl::alias NumThreadsA("j", cl::desc("Alias for --num-threads"),
 652                         cl::aliasopt(NumThreads));
 653
 654   auto commandLineParser = [&, this](int argc, const char **argv) -> int {
 655     cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n");
 656     ViewOpts.Debug = DebugDump;
 657
 658     if (!CovFilename.empty())
 659       ObjectFilenames.emplace_back(CovFilename);
 660     for (const std::string &Filename : CovFilenames)
 661       ObjectFilenames.emplace_back(Filename);
 662     if (ObjectFilenames.empty()) {
 663       errs() << "No filenames specified!\n";
 664       ::exit(1);
 665     }
 666
 667     ViewOpts.Format = Format;
 668     switch (ViewOpts.Format) {
 669     case CoverageViewOptions::OutputFormat::Text:
 670       ViewOpts.Colors = UseColor == cl::BOU_UNSET
 671                             ? sys::Process::StandardOutHasColors()
 672                             : UseColor == cl::BOU_TRUE;
 673       break;
 674     case CoverageViewOptions::OutputFormat::HTML:
 675       if (UseColor == cl::BOU_FALSE)
 676         errs() << "Color output cannot be disabled when generating html.\n";
 677       ViewOpts.Colors = true;
 678       break;
 679     case CoverageViewOptions::OutputFormat::Lcov:
 680       if (UseColor == cl::BOU_TRUE)
 681         errs() << "Color output cannot be enabled when generating lcov.\n";
 682       ViewOpts.Colors = false;
 683       break;
 684     }
 685
 686     // If path-equivalence was given and is a comma seperated pair then set
 687     // PathRemapping.
 688     auto EquivPair = StringRef(PathRemap).split(',');
 689     if (!(EquivPair.first.empty() && EquivPair.second.empty()))
 690       PathRemapping = EquivPair;
 691
 692     // If a demangler is supplied, check if it exists and register it.
 693     if (!DemanglerOpts.empty()) {
 694       auto DemanglerPathOrErr = sys::findProgramByName(DemanglerOpts[0]);
 695       if (!DemanglerPathOrErr) {
 696         error("Could not find the demangler!",
 697               DemanglerPathOrErr.getError().message());
 698         return 1;
 699       }
 700       DemanglerOpts[0] = *DemanglerPathOrErr;
 701       ViewOpts.DemanglerOpts.swap(DemanglerOpts);
 702     }
 703
 704     // Read in -name-whitelist files.
 705     if (!NameFilterFiles.empty()) {
 706       std::string SpecialCaseListErr;
 707       NameWhitelist =
 708           SpecialCaseList::create(NameFilterFiles, SpecialCaseListErr);
 709       if (!NameWhitelist)
 710         error(SpecialCaseListErr);
 711     }
 712
 713     // Create the function filters
 714     if (!NameFilters.empty() || NameWhitelist || !NameRegexFilters.empty()) {
 715       auto NameFilterer = llvm::make_unique<CoverageFilters>();
 716       for (const auto &Name : NameFilters)
 717         NameFilterer->push_back(llvm::make_unique<NameCoverageFilter>(Name));
 718       if (NameWhitelist)
 719         NameFilterer->push_back(
 720             llvm::make_unique<NameWhitelistCoverageFilter>(*NameWhitelist));
 721       for (const auto &Regex : NameRegexFilters)
 722         NameFilterer->push_back(
 723             llvm::make_unique<NameRegexCoverageFilter>(Regex));
 724       Filters.push_back(std::move(NameFilterer));
 725     }
 726
 727     if (RegionCoverageLtFilter.getNumOccurrences() ||
 728         RegionCoverageGtFilter.getNumOccurrences() ||
 729         LineCoverageLtFilter.getNumOccurrences() ||
 730         LineCoverageGtFilter.getNumOccurrences()) {
 731       auto StatFilterer = llvm::make_unique<CoverageFilters>();
 732       if (RegionCoverageLtFilter.getNumOccurrences())
 733         StatFilterer->push_back(llvm::make_unique<RegionCoverageFilter>(
 734             RegionCoverageFilter::LessThan, RegionCoverageLtFilter));
 735       if (RegionCoverageGtFilter.getNumOccurrences())
 736         StatFilterer->push_back(llvm::make_unique<RegionCoverageFilter>(
 737             RegionCoverageFilter::GreaterThan, RegionCoverageGtFilter));
 738       if (LineCoverageLtFilter.getNumOccurrences())
 739         StatFilterer->push_back(llvm::make_unique<LineCoverageFilter>(
 740             LineCoverageFilter::LessThan, LineCoverageLtFilter));
 741       if (LineCoverageGtFilter.getNumOccurrences())
 742         StatFilterer->push_back(llvm::make_unique<LineCoverageFilter>(
 743             RegionCoverageFilter::GreaterThan, LineCoverageGtFilter));
 744       Filters.push_back(std::move(StatFilterer));
 745     }
 746
 747     // Create the ignore filename filters.
 748     for (const auto &RE : IgnoreFilenameRegexFilters)
 749       IgnoreFilenameFilters.push_back(
 750           llvm::make_unique<NameRegexCoverageFilter>(RE));
 751
 752     if (!Arches.empty()) {
 753       for (const std::string &Arch : Arches) {
 754         if (Triple(Arch).getArch() == llvm::Triple::ArchType::UnknownArch) {
 755           error("Unknown architecture: " + Arch);
 756           return 1;
 757         }
 758         CoverageArches.emplace_back(Arch);
 759       }
 760       if (CoverageArches.size() != ObjectFilenames.size()) {
 761         error("Number of architectures doesn't match the number of objects");
 762         return 1;
 763       }
 764     }
 765
 766     // IgnoreFilenameFilters are applied even when InputSourceFiles specified.
 767     for (const std::string &File : InputSourceFiles)
 768       collectPaths(File);
 769
 770     if (DebugDumpCollectedPaths) {
 771       for (const std::string &SF : SourceFiles)
 772         outs() << SF << '\n';
 773       ::exit(0);
 774     }
 775
 776     ViewOpts.ShowRegionSummary = RegionSummary;
 777     ViewOpts.ShowInstantiationSummary = InstantiationSummary;
 778     ViewOpts.ExportSummaryOnly = SummaryOnly;
 779     ViewOpts.NumThreads = NumThreads;
 780
 781     return 0;
 782   };
 783
 784   switch (Cmd) {
 785   case Show:
 786     return doShow(argc, argv, commandLineParser);
 787   case Report:
 788     return doReport(argc, argv, commandLineParser);
 789   case Export:
 790     return doExport(argc, argv, commandLineParser);
 791   }
 792   return 0;
 793 }
 794
 795 int CodeCoverageTool::doShow(int argc, const char **argv,
 796                              CommandLineParserType commandLineParser) {
 797
 798   cl::OptionCategory ViewCategory("Viewing options");
 799
 800   cl::opt<bool> ShowLineExecutionCounts(
 801       "show-line-counts", cl::Optional,
 802       cl::desc("Show the execution counts for each line"), cl::init(true),
 803       cl::cat(ViewCategory));
 804
 805   cl::opt<bool> ShowRegions(
 806       "show-regions", cl::Optional,
 807       cl::desc("Show the execution counts for each region"),
 808       cl::cat(ViewCategory));
 809
 810   cl::opt<bool> ShowBestLineRegionsCounts(
 811       "show-line-counts-or-regions", cl::Optional,
 812       cl::desc("Show the execution counts for each line, or the execution "
 813                "counts for each region on lines that have multiple regions"),
 814       cl::cat(ViewCategory));
 815
 816   cl::opt<bool> ShowExpansions("show-expansions", cl::Optional,
 817                                cl::desc("Show expanded source regions"),
 818                                cl::cat(ViewCategory));
 819
 820   cl::opt<bool> ShowInstantiations("show-instantiations", cl::Optional,
 821                                    cl::desc("Show function instantiations"),
 822                                    cl::init(true), cl::cat(ViewCategory));
 823
 824   cl::opt<std::string> ShowOutputDirectory(
 825       "output-dir", cl::init(""),
 826       cl::desc("Directory in which coverage information is written out"));
 827   cl::alias ShowOutputDirectoryA("o", cl::desc("Alias for --output-dir"),
 828                                  cl::aliasopt(ShowOutputDirectory));
 829
 830   cl::opt<uint32_t> TabSize(
 831       "tab-size", cl::init(2),
 832       cl::desc(
 833           "Set tab expansion size for html coverage reports (default = 2)"));
 834
 835   cl::opt<std::string> ProjectTitle(
 836       "project-title", cl::Optional,
 837       cl::desc("Set project title for the coverage report"));
 838
 839   auto Err = commandLineParser(argc, argv);
 840   if (Err)
 841     return Err;
 842
 843   if (ViewOpts.Format == CoverageViewOptions::OutputFormat::Lcov) {
 844     error("Lcov format should be used with 'llvm-cov export'.");
 845     return 1;
 846   }
 847
 848   ViewOpts.ShowLineNumbers = true;
 849   ViewOpts.ShowLineStats = ShowLineExecutionCounts.getNumOccurrences() != 0 ||
 850                            !ShowRegions || ShowBestLineRegionsCounts;
 851   ViewOpts.ShowRegionMarkers = ShowRegions || ShowBestLineRegionsCounts;
 852   ViewOpts.ShowExpandedRegions = ShowExpansions;
 853   ViewOpts.ShowFunctionInstantiations = ShowInstantiations;
 854   ViewOpts.ShowOutputDirectory = ShowOutputDirectory;
 855   ViewOpts.TabSize = TabSize;
 856   ViewOpts.ProjectTitle = ProjectTitle;
 857
 858   if (ViewOpts.hasOutputDirectory()) {
 859     if (auto E = sys::fs::create_directories(ViewOpts.ShowOutputDirectory)) {
 860       error("Could not create output directory!", E.message());
 861       return 1;
 862     }
 863   }
 864
 865   sys::fs::file_status Status;
 866   if (sys::fs::status(PGOFilename, Status)) {
 867     error("profdata file error: can not get the file status. \n");
 868     return 1;
 869   }
 870
 871   auto ModifiedTime = Status.getLastModificationTime();
 872   std::string ModifiedTimeStr = to_string(ModifiedTime);
 873   size_t found = ModifiedTimeStr.rfind(':');
 874   ViewOpts.CreatedTimeStr = (found != std::string::npos)
 875                                 ? "Created: " + ModifiedTimeStr.substr(0, found)
 876                                 : "Created: " + ModifiedTimeStr;
 877
 878   auto Coverage = load();
 879   if (!Coverage)
 880     return 1;
 881
 882   auto Printer = CoveragePrinter::create(ViewOpts);
 883
 884   if (SourceFiles.empty())
 885     // Get the source files from the function coverage mapping.
 886     for (StringRef Filename : Coverage->getUniqueSourceFiles()) {
 887       if (!IgnoreFilenameFilters.matchesFilename(Filename))
 888         SourceFiles.push_back(Filename);
 889     }
 890
 891   // Create an index out of the source files.
 892   if (ViewOpts.hasOutputDirectory()) {
 893     if (Error E = Printer->createIndexFile(SourceFiles, *Coverage, Filters)) {
 894       error("Could not create index file!", toString(std::move(E)));
 895       return 1;
 896     }
 897   }
 898
 899   if (!Filters.empty()) {
 900     // Build the map of filenames to functions.
 901     std::map<llvm::StringRef, std::vector<const FunctionRecord *>>
 902         FilenameFunctionMap;
 903     for (const auto &SourceFile : SourceFiles)
 904       for (const auto &Function : Coverage->getCoveredFunctions(SourceFile))
 905         if (Filters.matches(*Coverage.get(), Function))
 906           FilenameFunctionMap[SourceFile].push_back(&Function);
 907
 908     // Only print filter matching functions for each file.
 909     for (const auto &FileFunc : FilenameFunctionMap) {
 910       StringRef File = FileFunc.first;
 911       const auto &Functions = FileFunc.second;
 912
 913       auto OSOrErr = Printer->createViewFile(File, /*InToplevel=*/false);
 914       if (Error E = OSOrErr.takeError()) {
 915         error("Could not create view file!", toString(std::move(E)));
 916         return 1;
 917       }
 918       auto OS = std::move(OSOrErr.get());
 919
 920       bool ShowTitle = ViewOpts.hasOutputDirectory();
 921       for (const auto *Function : Functions) {
 922         auto FunctionView = createFunctionView(*Function, *Coverage);
 923         if (!FunctionView) {
 924           warning("Could not read coverage for '" + Function->Name + "'.");
 925           continue;
 926         }
 927         FunctionView->print(*OS.get(), /*WholeFile=*/false,
 928                             /*ShowSourceName=*/true, ShowTitle);
 929         ShowTitle = false;
 930       }
 931
 932       Printer->closeViewFile(std::move(OS));
 933     }
 934     return 0;
 935   }
 936
 937   // Show files
 938   bool ShowFilenames =
 939       (SourceFiles.size() != 1) || ViewOpts.hasOutputDirectory() ||
 940       (ViewOpts.Format == CoverageViewOptions::OutputFormat::HTML);
 941
 942   auto NumThreads = ViewOpts.NumThreads;
 943
 944   // If NumThreads is not specified, auto-detect a good default.
 945   if (NumThreads == 0)
 946     NumThreads =
 947         std::max(1U, std::min(llvm::heavyweight_hardware_concurrency(),
 948                               unsigned(SourceFiles.size())));
 949
 950   if (!ViewOpts.hasOutputDirectory() || NumThreads == 1) {
 951     for (const std::string &SourceFile : SourceFiles)
 952       writeSourceFileView(SourceFile, Coverage.get(), Printer.get(),
 953                           ShowFilenames);
 954   } else {
 955     // In -output-dir mode, it's safe to use multiple threads to print files.
 956     ThreadPool Pool(NumThreads);
 957     for (const std::string &SourceFile : SourceFiles)
 958       Pool.async(&CodeCoverageTool::writeSourceFileView, this, SourceFile,
 959                  Coverage.get(), Printer.get(), ShowFilenames);
 960     Pool.wait();
 961   }
 962
 963   return 0;
 964 }
 965
 966 int CodeCoverageTool::doReport(int argc, const char **argv,
 967                                CommandLineParserType commandLineParser) {
 968   cl::opt<bool> ShowFunctionSummaries(
 969       "show-functions", cl::Optional, cl::init(false),
 970       cl::desc("Show coverage summaries for each function"));
 971
 972   auto Err = commandLineParser(argc, argv);
 973   if (Err)
 974     return Err;
 975
 976   if (ViewOpts.Format == CoverageViewOptions::OutputFormat::HTML) {
 977     error("HTML output for summary reports is not yet supported.");
 978     return 1;
 979   } else if (ViewOpts.Format == CoverageViewOptions::OutputFormat::Lcov) {
 980     error("Lcov format should be used with 'llvm-cov export'.");
 981     return 1;
 982   }
 983
 984   auto Coverage = load();
 985   if (!Coverage)
 986     return 1;
 987
 988   CoverageReport Report(ViewOpts, *Coverage.get());
 989   if (!ShowFunctionSummaries) {
 990     if (SourceFiles.empty())
 991       Report.renderFileReports(llvm::outs(), IgnoreFilenameFilters);
 992     else
 993       Report.renderFileReports(llvm::outs(), SourceFiles);
 994   } else {
 995     if (SourceFiles.empty()) {
 996       error("Source files must be specified when -show-functions=true is "
 997             "specified");
 998       return 1;
 999     }
1000
1001     Report.renderFunctionReports(SourceFiles, DC, llvm::outs());
1002   }
1003   return 0;
1004 }
1005
1006 int CodeCoverageTool::doExport(int argc, const char **argv,
1007                                CommandLineParserType commandLineParser) {
1008
1009   cl::OptionCategory ExportCategory("Exporting options");
1010
1011   cl::opt<bool> SkipExpansions("skip-expansions", cl::Optional,
1012                                cl::desc("Don't export expanded source regions"),
1013                                cl::cat(ExportCategory));
1014
1015   cl::opt<bool> SkipFunctions("skip-functions", cl::Optional,
1016                               cl::desc("Don't export per-function data"),
1017                               cl::cat(ExportCategory));
1018
1019   auto Err = commandLineParser(argc, argv);
1020   if (Err)
1021     return Err;
1022
1023   ViewOpts.SkipExpansions = SkipExpansions;
1024   ViewOpts.SkipFunctions = SkipFunctions;
1025
1026   if (ViewOpts.Format != CoverageViewOptions::OutputFormat::Text &&
1027       ViewOpts.Format != CoverageViewOptions::OutputFormat::Lcov) {
1028     error("Coverage data can only be exported as textual JSON or an "
1029           "lcov tracefile.");
1030     return 1;
1031   }
1032
1033   auto Coverage = load();
1034   if (!Coverage) {
1035     error("Could not load coverage information");
1036     return 1;
1037   }
1038
1039   std::unique_ptr<CoverageExporter> Exporter;
1040
1041   switch (ViewOpts.Format) {
1042   case CoverageViewOptions::OutputFormat::Text:
1043     Exporter = llvm::make_unique<CoverageExporterJson>(*Coverage.get(),
1044                                                        ViewOpts, outs());
1045     break;
1046   case CoverageViewOptions::OutputFormat::HTML:
1047     // Unreachable because we should have gracefully terminated with an error
1048     // above.
1049     llvm_unreachable("Export in HTML is not supported!");
1050   case CoverageViewOptions::OutputFormat::Lcov:
1051     Exporter = llvm::make_unique<CoverageExporterLcov>(*Coverage.get(),
1052                                                        ViewOpts, outs());
1053     break;
1054   }
1055
1056   if (SourceFiles.empty())
1057     Exporter->renderRoot(IgnoreFilenameFilters);
1058   else
1059     Exporter->renderRoot(SourceFiles);
1060
1061   return 0;
1062 }
1063
1064 int showMain(int argc, const char *argv[]) {
1065   CodeCoverageTool Tool;
1066   return Tool.run(CodeCoverageTool::Show, argc, argv);
1067 }
1068
1069 int reportMain(int argc, const char *argv[]) {
1070   CodeCoverageTool Tool;
1071   return Tool.run(CodeCoverageTool::Report, argc, argv);
1072 }
1073
1074 int exportMain(int argc, const char *argv[]) {
1075   CodeCoverageTool Tool;
1076   return Tool.run(CodeCoverageTool::Export, argc, argv);
1077 }