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/StringRef.h"
  15 #include "llvm/ADT/StringSwitch.h"
  16 #include "llvm/Support/CommandLine.h"
  17 #include "llvm/Support/InitLLVM.h"
  18 #include "llvm/Support/ManagedStatic.h"
  19 #include "llvm/Support/Path.h"
  20 #include "llvm/Support/Process.h"
  21 #include "llvm/Support/raw_ostream.h"
  22 #include <string>
  23
  24 using namespace llvm;
  25
  26 /// The main entry point for the 'show' subcommand.
  27 int showMain(int argc, const char *argv[]);
  28
  29 /// The main entry point for the 'report' subcommand.
  30 int reportMain(int argc, const char *argv[]);
  31
  32 /// The main entry point for the 'export' subcommand.
  33 int exportMain(int argc, const char *argv[]);
  34
  35 /// The main entry point for the 'convert-for-testing' subcommand.
  36 int convertForTestingMain(int argc, const char *argv[]);
  37
  38 /// The main entry point for the gcov compatible coverage tool.
  39 int gcovMain(int argc, const char *argv[]);
  40
  41 /// Top level help.
  42 static int helpMain(int argc, const char *argv[]) {
  43   errs() << "Usage: llvm-cov {export|gcov|report|show} [OPTION]...\n\n"
  44          << "Shows code coverage information.\n\n"
  45          << "Subcommands:\n"
  46          << "  export: Export instrprof file to structured format.\n"
  47          << "  gcov:   Work with the gcov format.\n"
  48          << "  report: Summarize instrprof style coverage information.\n"
  49          << "  show:   Annotate source files using instrprof style coverage.\n";
  50
  51   return 0;
  52 }
  53
  54 /// Top level version information.
  55 static int versionMain(int argc, const char *argv[]) {
  56   cl::PrintVersionMessage();
  57   return 0;
  58 }
  59
  60 int main(int argc, const char **argv) {
  61   InitLLVM X(argc, argv);
  62
  63   // If argv[0] is or ends with 'gcov', always be gcov compatible
  64   if (sys::path::stem(argv[0]).endswith_lower("gcov"))
  65     return gcovMain(argc, argv);
  66
  67   // Check if we are invoking a specific tool command.
  68   if (argc > 1) {
  69     typedef int (*MainFunction)(int, const char *[]);
  70     MainFunction Func = StringSwitch<MainFunction>(argv[1])
  71                             .Case("convert-for-testing", convertForTestingMain)
  72                             .Case("export", exportMain)
  73                             .Case("gcov", gcovMain)
  74                             .Case("report", reportMain)
  75                             .Case("show", showMain)
  76                             .Cases("-h", "-help", "--help", helpMain)
  77                             .Cases("-version", "--version", versionMain)
  78                             .Default(nullptr);
  79
  80     if (Func) {
  81       std::string Invocation = std::string(argv[0]) + " " + argv[1];
  82       argv[1] = Invocation.c_str();
  83       return Func(argc - 1, argv + 1);
  84     }
  85   }
  86
  87   if (argc > 1) {
  88     if (sys::Process::StandardErrHasColors())
  89       errs().changeColor(raw_ostream::RED);
  90     errs() << "Unrecognized command: " << argv[1] << ".\n\n";
  91     if (sys::Process::StandardErrHasColors())
  92       errs().resetColor();
  93   }
  94   helpMain(argc, argv);
  95   return 1;
  96 }