src/llvm/tools/llvm-cov/gcov.cpp

   1 //===- gcov.cpp - GCOV compatible LLVM coverage tool ----------------------===//
   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 // llvm-cov is a command line tools to analyze and report coverage information.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/ADT/SmallString.h"
  15 #include "llvm/Support/CommandLine.h"
  16 #include "llvm/Support/Errc.h"
  17 #include "llvm/Support/FileSystem.h"
  18 #include "llvm/Support/GCOV.h"
  19 #include "llvm/Support/ManagedStatic.h"
  20 #include "llvm/Support/Path.h"
  21 #include "llvm/Support/PrettyStackTrace.h"
  22 #include "llvm/Support/Signals.h"
  23 #include <system_error>
  24 using namespace llvm;
  25
  26 void reportCoverage(StringRef SourceFile, StringRef ObjectDir,
  27                     const std::string &InputGCNO, const std::string &InputGCDA,
  28                     bool DumpGCOV, const GCOVOptions &Options) {
  29   SmallString<128> CoverageFileStem(ObjectDir);
  30   if (CoverageFileStem.empty()) {
  31     // If no directory was specified with -o, look next to the source file.
  32     CoverageFileStem = sys::path::parent_path(SourceFile);
  33     sys::path::append(CoverageFileStem, sys::path::stem(SourceFile));
  34   } else if (sys::fs::is_directory(ObjectDir))
  35     // A directory name was given. Use it and the source file name.
  36     sys::path::append(CoverageFileStem, sys::path::stem(SourceFile));
  37   else
  38     // A file was given. Ignore the source file and look next to this file.
  39     sys::path::replace_extension(CoverageFileStem, "");
  40
  41   std::string GCNO = InputGCNO.empty()
  42                          ? std::string(CoverageFileStem.str()) + ".gcno"
  43                          : InputGCNO;
  44   std::string GCDA = InputGCDA.empty()
  45                          ? std::string(CoverageFileStem.str()) + ".gcda"
  46                          : InputGCDA;
  47   GCOVFile GF;
  48
  49   ErrorOr<std::unique_ptr<MemoryBuffer>> GCNO_Buff =
  50       MemoryBuffer::getFileOrSTDIN(GCNO);
  51   if (std::error_code EC = GCNO_Buff.getError()) {
  52     errs() << GCNO << ": " << EC.message() << "\n";
  53     return;
  54   }
  55   GCOVBuffer GCNO_GB(GCNO_Buff.get().get());
  56   if (!GF.readGCNO(GCNO_GB)) {
  57     errs() << "Invalid .gcno File!\n";
  58     return;
  59   }
  60
  61   ErrorOr<std::unique_ptr<MemoryBuffer>> GCDA_Buff =
  62       MemoryBuffer::getFileOrSTDIN(GCDA);
  63   if (std::error_code EC = GCDA_Buff.getError()) {
  64     if (EC != errc::no_such_file_or_directory) {
  65       errs() << GCDA << ": " << EC.message() << "\n";
  66       return;
  67     }
  68     // Clear the filename to make it clear we didn't read anything.
  69     GCDA = "-";
  70   } else {
  71     GCOVBuffer GCDA_GB(GCDA_Buff.get().get());
  72     if (!GF.readGCDA(GCDA_GB)) {
  73       errs() << "Invalid .gcda File!\n";
  74       return;
  75     }
  76   }
  77
  78   if (DumpGCOV)
  79     GF.dump();
  80
  81   FileInfo FI(Options);
  82   GF.collectLineCounts(FI);
  83   FI.print(SourceFile, GCNO, GCDA);
  84 }
  85
  86 int gcovMain(int argc, const char *argv[]) {
  87   // Print a stack trace if we signal out.
  88   sys::PrintStackTraceOnErrorSignal();
  89   PrettyStackTraceProgram X(argc, argv);
  90   llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
  91
  92   cl::list<std::string> SourceFiles(cl::Positional, cl::OneOrMore,
  93                                     cl::desc("SOURCEFILE"));
  94
  95   cl::opt<bool> AllBlocks("a", cl::Grouping, cl::init(false),
  96                           cl::desc("Display all basic blocks"));
  97   cl::alias AllBlocksA("all-blocks", cl::aliasopt(AllBlocks));
  98
  99   cl::opt<bool> BranchProb("b", cl::Grouping, cl::init(false),
 100                            cl::desc("Display branch probabilities"));
 101   cl::alias BranchProbA("branch-probabilities", cl::aliasopt(BranchProb));
 102
 103   cl::opt<bool> BranchCount("c", cl::Grouping, cl::init(false),
 104                             cl::desc("Display branch counts instead "
 105                                      "of percentages (requires -b)"));
 106   cl::alias BranchCountA("branch-counts", cl::aliasopt(BranchCount));
 107
 108   cl::opt<bool> LongNames("l", cl::Grouping, cl::init(false),
 109                           cl::desc("Prefix filenames with the main file"));
 110   cl::alias LongNamesA("long-file-names", cl::aliasopt(LongNames));
 111
 112   cl::opt<bool> FuncSummary("f", cl::Grouping, cl::init(false),
 113                             cl::desc("Show coverage for each function"));
 114   cl::alias FuncSummaryA("function-summaries", cl::aliasopt(FuncSummary));
 115
 116   cl::opt<bool> NoOutput("n", cl::Grouping, cl::init(false),
 117                          cl::desc("Do not output any .gcov files"));
 118   cl::alias NoOutputA("no-output", cl::aliasopt(NoOutput));
 119
 120   cl::opt<std::string> ObjectDir(
 121       "o", cl::value_desc("DIR|FILE"), cl::init(""),
 122       cl::desc("Find objects in DIR or based on FILE's path"));
 123   cl::alias ObjectDirA("object-directory", cl::aliasopt(ObjectDir));
 124   cl::alias ObjectDirB("object-file", cl::aliasopt(ObjectDir));
 125
 126   cl::opt<bool> PreservePaths("p", cl::Grouping, cl::init(false),
 127                               cl::desc("Preserve path components"));
 128   cl::alias PreservePathsA("preserve-paths", cl::aliasopt(PreservePaths));
 129
 130   cl::opt<bool> UncondBranch("u", cl::Grouping, cl::init(false),
 131                              cl::desc("Display unconditional branch info "
 132                                       "(requires -b)"));
 133   cl::alias UncondBranchA("unconditional-branches", cl::aliasopt(UncondBranch));
 134
 135   cl::OptionCategory DebugCat("Internal and debugging options");
 136   cl::opt<bool> DumpGCOV("dump", cl::init(false), cl::cat(DebugCat),
 137                          cl::desc("Dump the gcov file to stderr"));
 138   cl::opt<std::string> InputGCNO("gcno", cl::cat(DebugCat), cl::init(""),
 139                                  cl::desc("Override inferred gcno file"));
 140   cl::opt<std::string> InputGCDA("gcda", cl::cat(DebugCat), cl::init(""),
 141                                  cl::desc("Override inferred gcda file"));
 142
 143   cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n");
 144
 145   GCOVOptions Options(AllBlocks, BranchProb, BranchCount, FuncSummary,
 146                       PreservePaths, UncondBranch, LongNames, NoOutput);
 147
 148   for (const auto &SourceFile : SourceFiles)
 149     reportCoverage(SourceFile, ObjectDir, InputGCNO, InputGCDA, DumpGCOV,
 150                    Options);
 151   return 0;
 152 }