bolt/tools/heatmap/heatmap.cpp

   1 #include "bolt/Profile/DataAggregator.h"
   2 #include "bolt/Rewrite/RewriteInstance.h"
   3 #include "bolt/Utils/CommandLineOpts.h"
   4 #include "llvm/MC/TargetRegistry.h"
   5 #include "llvm/Object/Binary.h"
   6 #include "llvm/Support/CommandLine.h"
   7 #include "llvm/Support/Errc.h"
   8 #include "llvm/Support/Error.h"
   9 #include "llvm/Support/Path.h"
  10 #include "llvm/Support/TargetSelect.h"
  11
  12 using namespace llvm;
  13 using namespace bolt;
  14
  15 namespace opts {
  16
  17 static cl::OptionCategory *HeatmapCategories[] = {&HeatmapCategory,
  18                                                   &BoltOutputCategory};
  19
  20 static cl::opt<std::string> InputFilename(cl::Positional,
  21                                           cl::desc("<executable>"),
  22                                           cl::Required,
  23                                           cl::cat(HeatmapCategory));
  24
  25 } // namespace opts
  26
  27 static StringRef ToolName;
  28
  29 static void report_error(StringRef Message, std::error_code EC) {
  30   assert(EC);
  31   errs() << ToolName << ": '" << Message << "': " << EC.message() << ".\n";
  32   exit(1);
  33 }
  34
  35 static void report_error(StringRef Message, Error E) {
  36   assert(E);
  37   errs() << ToolName << ": '" << Message << "': " << toString(std::move(E))
  38          << ".\n";
  39   exit(1);
  40 }
  41
  42 static std::string GetExecutablePath(const char *Argv0) {
  43   SmallString<256> ExecutablePath(Argv0);
  44   // Do a PATH lookup if Argv0 isn't a valid path.
  45   if (!llvm::sys::fs::exists(ExecutablePath))
  46     if (llvm::ErrorOr<std::string> P =
  47             llvm::sys::findProgramByName(ExecutablePath))
  48       ExecutablePath = *P;
  49   return std::string(ExecutablePath.str());
  50 }
  51
  52 int main(int argc, char **argv) {
  53   cl::HideUnrelatedOptions(ArrayRef(opts::HeatmapCategories));
  54   cl::ParseCommandLineOptions(argc, argv, "");
  55
  56   if (opts::PerfData.empty()) {
  57     errs() << ToolName << ": expected -perfdata=<filename> option.\n";
  58     exit(1);
  59   }
  60
  61   opts::HeatmapMode = true;
  62   opts::AggregateOnly = true;
  63   if (!sys::fs::exists(opts::InputFilename))
  64     report_error(opts::InputFilename, errc::no_such_file_or_directory);
  65
  66   // Output to stdout by default
  67   if (opts::OutputFilename.empty())
  68     opts::OutputFilename = "-";
  69
  70   // Initialize targets and assembly printers/parsers.
  71   llvm::InitializeAllTargetInfos();
  72   llvm::InitializeAllTargetMCs();
  73   llvm::InitializeAllAsmParsers();
  74   llvm::InitializeAllDisassemblers();
  75
  76   llvm::InitializeAllTargets();
  77   llvm::InitializeAllAsmPrinters();
  78
  79   ToolName = argv[0];
  80   std::string ToolPath = GetExecutablePath(argv[0]);
  81   Expected<OwningBinary<Binary>> BinaryOrErr =
  82       createBinary(opts::InputFilename);
  83   if (Error E = BinaryOrErr.takeError())
  84     report_error(opts::InputFilename, std::move(E));
  85   Binary &Binary = *BinaryOrErr.get().getBinary();
  86
  87   if (auto *e = dyn_cast<ELFObjectFileBase>(&Binary)) {
  88     auto RIOrErr = RewriteInstance::create(e, argc, argv, ToolPath);
  89     if (Error E = RIOrErr.takeError())
  90       report_error("RewriteInstance", std::move(E));
  91
  92     RewriteInstance &RI = *RIOrErr.get();
  93     if (Error E = RI.setProfile(opts::PerfData))
  94       report_error(opts::PerfData, std::move(E));
  95
  96     if (Error E = RI.run())
  97       report_error(opts::InputFilename, std::move(E));
  98   } else {
  99     report_error(opts::InputFilename, object_error::invalid_file_type);
 100   }
 101
 102   return EXIT_SUCCESS;
 103 }