tools/llvm-cov/llvm-cov.cpp

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