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/OwningPtr.h"
  15 #include "llvm/Support/CommandLine.h"
  16 #include "llvm/Support/GCOV.h"
  17 #include "llvm/Support/ManagedStatic.h"
  18 #include "llvm/Support/MemoryObject.h"
  19 #include "llvm/Support/PrettyStackTrace.h"
  20 #include "llvm/Support/Signals.h"
  21 #include "llvm/Support/system_error.h"
  22 using namespace llvm;
  23
  24 static cl::opt<std::string> SourceFile(cl::Positional, cl::Required,
  25                                        cl::desc("SOURCEFILE"));
  26
  27 static cl::opt<bool> AllBlocks("a", cl::init(false),
  28                                cl::desc("Display all basic blocks"));
  29 static cl::alias AllBlocksA("all-blocks", cl::aliasopt(AllBlocks));
  30
  31 static cl::opt<bool> BranchProb("b", cl::init(false),
  32                                 cl::desc("Display branch probabilities"));
  33 static cl::alias BranchProbA("branch-probabilities", cl::aliasopt(BranchProb));
  34
  35 static cl::opt<bool> BranchCount("c", cl::init(false),
  36                                  cl::desc("Display branch counts instead "
  37                                            "of percentages (requires -b)"));
  38 static cl::alias BranchCountA("branch-counts", cl::aliasopt(BranchCount));
  39
  40 static cl::opt<bool> FuncSummary("f", cl::init(false),
  41                                  cl::desc("Show coverage for each function"));
  42 static cl::alias FuncSummaryA("function-summaries", cl::aliasopt(FuncSummary));
  43
  44 static cl::opt<bool> UncondBranch("u", cl::init(false),
  45                                   cl::desc("Display unconditional branch info "
  46                                            "(requires -b)"));
  47 static cl::alias UncondBranchA("unconditional-branches",
  48                                cl::aliasopt(UncondBranch));
  49
  50 static cl::OptionCategory DebugCat("Internal and debugging options");
  51 static cl::opt<bool> DumpGCOV("dump", cl::init(false), cl::cat(DebugCat),
  52                               cl::desc("Dump the gcov file to stderr"));
  53 static cl::opt<std::string> InputGCNO("gcno", cl::cat(DebugCat), cl::init(""),
  54                                       cl::desc("Override inferred gcno file"));
  55 static cl::opt<std::string> InputGCDA("gcda", cl::cat(DebugCat), cl::init(""),
  56                                       cl::desc("Override inferred gcda file"));
  57
  58 //===----------------------------------------------------------------------===//
  59 int main(int argc, char **argv) {
  60   // Print a stack trace if we signal out.
  61   sys::PrintStackTraceOnErrorSignal();
  62   PrettyStackTraceProgram X(argc, argv);
  63   llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
  64
  65   cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n");
  66
  67   if (InputGCNO.empty())
  68     InputGCNO = SourceFile.substr(0, SourceFile.rfind(".")) + ".gcno";
  69   if (InputGCDA.empty())
  70     InputGCDA = SourceFile.substr(0, SourceFile.rfind(".")) + ".gcda";
  71
  72   GCOVFile GF;
  73
  74   OwningPtr<MemoryBuffer> GCNO_Buff;
  75   if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputGCNO, GCNO_Buff)) {
  76     errs() << InputGCNO << ": " << ec.message() << "\n";
  77     return 1;
  78   }
  79   GCOVBuffer GCNO_GB(GCNO_Buff.get());
  80   if (!GF.readGCNO(GCNO_GB)) {
  81     errs() << "Invalid .gcno File!\n";
  82     return 1;
  83   }
  84
  85   OwningPtr<MemoryBuffer> GCDA_Buff;
  86   if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputGCDA, GCDA_Buff)) {
  87     if (ec != errc::no_such_file_or_directory) {
  88       errs() << InputGCDA << ": " << ec.message() << "\n";
  89       return 1;
  90     }
  91     // Clear the filename to make it clear we didn't read anything.
  92     InputGCDA = "-";
  93   } else {
  94     GCOVBuffer GCDA_GB(GCDA_Buff.get());
  95     if (!GF.readGCDA(GCDA_GB)) {
  96       errs() << "Invalid .gcda File!\n";
  97       return 1;
  98     }
  99   }
 100
 101   if (DumpGCOV)
 102     GF.dump();
 103
 104   GCOVOptions Options(AllBlocks, BranchProb, BranchCount, FuncSummary,
 105                       UncondBranch);
 106   FileInfo FI(Options);
 107   GF.collectLineCounts(FI);
 108   FI.print(InputGCNO, InputGCDA);
 109   return 0;
 110 }