C++ list::push_back方法代码示例

int main(int argc, char **argv) {
  // Print a stack trace if we signal out.
  sys::PrintStackTraceOnErrorSignal(argv[0]);
  PrettyStackTraceProgram X(argc, argv);
  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.

  cl::ParseCommandLineOptions(argc, argv, "llvm dwarf dumper\n");

  // Defaults to a.out if no filenames specified.
  if (InputFilenames.size() == 0)
    InputFilenames.push_back("a.out");

  // Expand any .dSYM bundles to the individual object files contained therein.
  std::vector<std::string> Objects;
  for (const auto &F : InputFilenames) {
    auto Objs = expandBundle(F);
    Objects.insert(Objects.end(), Objs.begin(), Objs.end());
  }

  std::for_each(Objects.begin(), Objects.end(), DumpInput);

  return EXIT_SUCCESS;
}

int main(int argc, char **argv) {
  // Print a stack trace if we signal out.
  sys::PrintStackTraceOnErrorSignal();
  PrettyStackTraceProgram X(argc, argv);

  llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
  cl::ParseCommandLineOptions(argc, argv, "llvm object size dumper\n");

  ToolName = argv[0];
  if (OutputFormatShort.getNumOccurrences())
    OutputFormat = OutputFormatShort;
  if (RadixShort.getNumOccurrences())
    Radix = RadixShort;

  for (unsigned i = 0; i < ArchFlags.size(); ++i) {
    if (ArchFlags[i] == "all") {
      ArchAll = true;
    } else {
      Triple T = MachOObjectFile::getArch(ArchFlags[i]);
      if (T.getArch() == Triple::UnknownArch) {
        outs() << ToolName << ": for the -arch option: Unknown architecture "
               << "named '" << ArchFlags[i] << "'";
        return 1;
      }
    }
  }

  if (InputFilenames.size() == 0)
    InputFilenames.push_back("a.out");

  moreThanOneFile = InputFilenames.size() > 1;
  std::for_each(InputFilenames.begin(), InputFilenames.end(),
                PrintFileSectionSizes);

  return 0;
}

// Load and link the objects specified on the command line, but do not execute
// anything. Instead, attach a RuntimeDyldChecker instance and call it to
// verify the correctness of the linked memory.
static int linkAndVerify() {

  // Check for missing triple.
  if (TripleName == "") {
    llvm::errs() << "Error: -triple required when running in -verify mode.\n";
    return 1;
  }

  // Look up the target and build the disassembler.
  Triple TheTriple(Triple::normalize(TripleName));
  std::string ErrorStr;
  const Target *TheTarget =
    TargetRegistry::lookupTarget("", TheTriple, ErrorStr);
  if (!TheTarget) {
    llvm::errs() << "Error accessing target '" << TripleName << "': "
                 << ErrorStr << "\n";
    return 1;
  }
  TripleName = TheTriple.getTriple();

  std::unique_ptr<MCSubtargetInfo> STI(
    TheTarget->createMCSubtargetInfo(TripleName, "", ""));
  assert(STI && "Unable to create subtarget info!");

  std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
  assert(MRI && "Unable to create target register info!");

  std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
  assert(MAI && "Unable to create target asm info!");

  MCContext Ctx(MAI.get(), MRI.get(), nullptr);

  std::unique_ptr<MCDisassembler> Disassembler(
    TheTarget->createMCDisassembler(*STI, Ctx));
  assert(Disassembler && "Unable to create disassembler!");

  std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo());

  std::unique_ptr<MCInstPrinter> InstPrinter(
    TheTarget->createMCInstPrinter(0, *MAI, *MII, *MRI, *STI));

  // Load any dylibs requested on the command line.
  loadDylibs();

  // Instantiate a dynamic linker.
  TrivialMemoryManager MemMgr;
  RuntimeDyld Dyld(&MemMgr);
  RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(),
                             llvm::dbgs());

  // If we don't have any input files, read from stdin.
  if (!InputFileList.size())
    InputFileList.push_back("-");
  for(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
    // Load the input memory buffer.
    ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
        MemoryBuffer::getFileOrSTDIN(InputFileList[i]);
    if (std::error_code EC = InputBuffer.getError())
      return Error("unable to read input: '" + EC.message() + "'");

    std::unique_ptr<ObjectImage> LoadedObject;
    // Load the object file
    LoadedObject.reset(
        Dyld.loadObject(new ObjectBuffer(InputBuffer.get().release())));
    if (!LoadedObject) {
      return Error(Dyld.getErrorString());
    }
  }

  // Re-map the section addresses into the phony target address space.
  remapSections(TheTriple, MemMgr, Dyld);

  // Resolve all the relocations we can.
  Dyld.resolveRelocations();

  int ErrorCode = checkAllExpressions(Checker);
  if (Dyld.hasError()) {
    errs() << "RTDyld reported an error applying relocations:\n  "
           << Dyld.getErrorString() << "\n";
    ErrorCode = 1;
  }

  return ErrorCode;
}

static int printLineInfoForInput() {
  // Load any dylibs requested on the command line.
  loadDylibs();

  // If we don't have any input files, read from stdin.
  if (!InputFileList.size())
    InputFileList.push_back("-");
  for(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
    // Instantiate a dynamic linker.
    TrivialMemoryManager MemMgr;
    RuntimeDyld Dyld(&MemMgr);

    // Load the input memory buffer.

    ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
        MemoryBuffer::getFileOrSTDIN(InputFileList[i]);
    if (std::error_code EC = InputBuffer.getError())
      return Error("unable to read input: '" + EC.message() + "'");

    std::unique_ptr<ObjectImage> LoadedObject;
    // Load the object file
    LoadedObject.reset(
        Dyld.loadObject(new ObjectBuffer(InputBuffer.get().release())));
    if (!LoadedObject) {
      return Error(Dyld.getErrorString());
    }

    // Resolve all the relocations we can.
    Dyld.resolveRelocations();

    std::unique_ptr<DIContext> Context(
        DIContext::getDWARFContext(*LoadedObject->getObjectFile()));

    // Use symbol info to iterate functions in the object.
    for (object::symbol_iterator I = LoadedObject->begin_symbols(),
                                 E = LoadedObject->end_symbols();
         I != E; ++I) {
      object::SymbolRef::Type SymType;
      if (I->getType(SymType)) continue;
      if (SymType == object::SymbolRef::ST_Function) {
        StringRef  Name;
        uint64_t   Addr;
        uint64_t   Size;
        if (I->getName(Name)) continue;
        if (I->getAddress(Addr)) continue;
        if (I->getSize(Size)) continue;

        outs() << "Function: " << Name << ", Size = " << Size << "\n";

        DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size);
        DILineInfoTable::iterator  Begin = Lines.begin();
        DILineInfoTable::iterator  End = Lines.end();
        for (DILineInfoTable::iterator It = Begin; It != End; ++It) {
          outs() << "  Line info @ " << It->first - Addr << ": "
                 << It->second.FileName << ", line:" << It->second.Line << "\n";
        }
      }
    }
  }

  return 0;
}

// Load and link the objects specified on the command line, but do not execute
// anything. Instead, attach a RuntimeDyldChecker instance and call it to
// verify the correctness of the linked memory.
static int linkAndVerify() {

  // Check for missing triple.
  if (TripleName == "")
    ErrorAndExit("-triple required when running in -verify mode.");

  // Look up the target and build the disassembler.
  Triple TheTriple(Triple::normalize(TripleName));
  std::string ErrorStr;
  const Target *TheTarget =
    TargetRegistry::lookupTarget("", TheTriple, ErrorStr);
  if (!TheTarget)
    ErrorAndExit("Error accessing target '" + TripleName + "': " + ErrorStr);

  TripleName = TheTriple.getTriple();

  std::unique_ptr<MCSubtargetInfo> STI(
    TheTarget->createMCSubtargetInfo(TripleName, MCPU, ""));
  if (!STI)
    ErrorAndExit("Unable to create subtarget info!");

  std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
  if (!MRI)
    ErrorAndExit("Unable to create target register info!");

  std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
  if (!MAI)
    ErrorAndExit("Unable to create target asm info!");

  MCContext Ctx(MAI.get(), MRI.get(), nullptr);

  std::unique_ptr<MCDisassembler> Disassembler(
    TheTarget->createMCDisassembler(*STI, Ctx));
  if (!Disassembler)
    ErrorAndExit("Unable to create disassembler!");

  std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo());

  std::unique_ptr<MCInstPrinter> InstPrinter(
      TheTarget->createMCInstPrinter(Triple(TripleName), 0, *MAI, *MII, *MRI));

  // Load any dylibs requested on the command line.
  loadDylibs();

  // Instantiate a dynamic linker.
  TrivialMemoryManager MemMgr;
  doPreallocation(MemMgr);
  RuntimeDyld Dyld(MemMgr, MemMgr);
  Dyld.setProcessAllSections(true);
  RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(),
                             llvm::dbgs());

  // If we don't have any input files, read from stdin.
  if (!InputFileList.size())
    InputFileList.push_back("-");
  for (auto &Filename : InputFileList) {
    // Load the input memory buffer.
    ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
        MemoryBuffer::getFileOrSTDIN(Filename);

    if (std::error_code EC = InputBuffer.getError())
      ErrorAndExit("unable to read input: '" + EC.message() + "'");

    Expected<std::unique_ptr<ObjectFile>> MaybeObj(
      ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));

    if (!MaybeObj) {
      std::string Buf;
      raw_string_ostream OS(Buf);
      logAllUnhandledErrors(MaybeObj.takeError(), OS, "");
      OS.flush();
      ErrorAndExit("unable to create object file: '" + Buf + "'");
    }

    ObjectFile &Obj = **MaybeObj;

    // Load the object file
    Dyld.loadObject(Obj);
    if (Dyld.hasError()) {
      ErrorAndExit(Dyld.getErrorString());
    }
  }

  // Re-map the section addresses into the phony target address space and add
  // dummy symbols.
  remapSectionsAndSymbols(TheTriple, MemMgr, Checker);

  // Resolve all the relocations we can.
  Dyld.resolveRelocations();

  // Register EH frames.
  Dyld.registerEHFrames();

  int ErrorCode = checkAllExpressions(Checker);
  if (Dyld.hasError())
    ErrorAndExit("RTDyld reported an error applying relocations:\n  " +
                 Dyld.getErrorString());
//.........这里部分代码省略.........

static int executeInput() {
  // Load any dylibs requested on the command line.
  loadDylibs();

  // Instantiate a dynamic linker.
  TrivialMemoryManager MemMgr;
  doPreallocation(MemMgr);
  RuntimeDyld Dyld(MemMgr, MemMgr);

  // If we don't have any input files, read from stdin.
  if (!InputFileList.size())
    InputFileList.push_back("-");
  for (auto &File : InputFileList) {
    // Load the input memory buffer.
    ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
        MemoryBuffer::getFileOrSTDIN(File);
    if (std::error_code EC = InputBuffer.getError())
      ErrorAndExit("unable to read input: '" + EC.message() + "'");
    Expected<std::unique_ptr<ObjectFile>> MaybeObj(
      ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));

    if (!MaybeObj) {
      std::string Buf;
      raw_string_ostream OS(Buf);
      logAllUnhandledErrors(MaybeObj.takeError(), OS, "");
      OS.flush();
      ErrorAndExit("unable to create object file: '" + Buf + "'");
    }

    ObjectFile &Obj = **MaybeObj;

    // Load the object file
    Dyld.loadObject(Obj);
    if (Dyld.hasError()) {
      ErrorAndExit(Dyld.getErrorString());
    }
  }

  // Resove all the relocations we can.
  // FIXME: Error out if there are unresolved relocations.
  Dyld.resolveRelocations();

  // Get the address of the entry point (_main by default).
  void *MainAddress = Dyld.getSymbolLocalAddress(EntryPoint);
  if (!MainAddress)
    ErrorAndExit("no definition for '" + EntryPoint + "'");

  // Invalidate the instruction cache for each loaded function.
  for (auto &FM : MemMgr.FunctionMemory) {

    // Make sure the memory is executable.
    // setExecutable will call InvalidateInstructionCache.
    std::string ErrorStr;
    if (!sys::Memory::setExecutable(FM, &ErrorStr))
      ErrorAndExit("unable to mark function executable: '" + ErrorStr + "'");
  }

  // Dispatch to _main().
  errs() << "loaded '" << EntryPoint << "' at: " << (void*)MainAddress << "\n";

  int (*Main)(int, const char**) =
    (int(*)(int,const char**)) uintptr_t(MainAddress);
  const char **Argv = new const char*[2];
  // Use the name of the first input object module as argv[0] for the target.
  Argv[0] = InputFileList[0].c_str();
  Argv[1] = nullptr;
  return Main(1, Argv);
}

static int printLineInfoForInput(bool LoadObjects, bool UseDebugObj) {
  assert(LoadObjects || !UseDebugObj);

  // Load any dylibs requested on the command line.
  loadDylibs();

  // If we don't have any input files, read from stdin.
  if (!InputFileList.size())
    InputFileList.push_back("-");
  for (auto &File : InputFileList) {
    // Instantiate a dynamic linker.
    TrivialMemoryManager MemMgr;
    RuntimeDyld Dyld(MemMgr, MemMgr);

    // Load the input memory buffer.

    ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
        MemoryBuffer::getFileOrSTDIN(File);
    if (std::error_code EC = InputBuffer.getError())
      ErrorAndExit("unable to read input: '" + EC.message() + "'");

    Expected<std::unique_ptr<ObjectFile>> MaybeObj(
      ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));

    if (!MaybeObj) {
      std::string Buf;
      raw_string_ostream OS(Buf);
      logAllUnhandledErrors(MaybeObj.takeError(), OS, "");
      OS.flush();
      ErrorAndExit("unable to create object file: '" + Buf + "'");
    }

    ObjectFile &Obj = **MaybeObj;

    OwningBinary<ObjectFile> DebugObj;
    std::unique_ptr<RuntimeDyld::LoadedObjectInfo> LoadedObjInfo = nullptr;
    ObjectFile *SymbolObj = &Obj;
    if (LoadObjects) {
      // Load the object file
      LoadedObjInfo =
        Dyld.loadObject(Obj);

      if (Dyld.hasError())
        ErrorAndExit(Dyld.getErrorString());

      // Resolve all the relocations we can.
      Dyld.resolveRelocations();

      if (UseDebugObj) {
        DebugObj = LoadedObjInfo->getObjectForDebug(Obj);
        SymbolObj = DebugObj.getBinary();
        LoadedObjInfo.reset();
      }
    }

    std::unique_ptr<DIContext> Context(
      new DWARFContextInMemory(*SymbolObj,LoadedObjInfo.get()));

    std::vector<std::pair<SymbolRef, uint64_t>> SymAddr =
        object::computeSymbolSizes(*SymbolObj);

    // Use symbol info to iterate functions in the object.
    for (const auto &P : SymAddr) {
      object::SymbolRef Sym = P.first;
      Expected<SymbolRef::Type> TypeOrErr = Sym.getType();
      if (!TypeOrErr) {
        // TODO: Actually report errors helpfully.
        consumeError(TypeOrErr.takeError());
        continue;
      }
      SymbolRef::Type Type = *TypeOrErr;
      if (Type == object::SymbolRef::ST_Function) {
        Expected<StringRef> Name = Sym.getName();
        if (!Name) {
          // TODO: Actually report errors helpfully.
          consumeError(Name.takeError());
          continue;
        }
        Expected<uint64_t> AddrOrErr = Sym.getAddress();
        if (!AddrOrErr) {
          // TODO: Actually report errors helpfully.
          consumeError(AddrOrErr.takeError());
          continue;
        }
        uint64_t Addr = *AddrOrErr;

        uint64_t Size = P.second;
        // If we're not using the debug object, compute the address of the
        // symbol in memory (rather than that in the unrelocated object file)
        // and use that to query the DWARFContext.
        if (!UseDebugObj && LoadObjects) {
          auto SecOrErr = Sym.getSection();
          if (!SecOrErr) {
            // TODO: Actually report errors helpfully.
            consumeError(SecOrErr.takeError());
            continue;
          }
          object::section_iterator Sec = *SecOrErr;
          StringRef SecName;
          Sec->getName(SecName);
//.........这里部分代码省略.........

// I don't think there's a way to specify an initial value for cl::list,
// so if nothing was specified, add the default
static void AddCheckPrefixIfNeeded() {
  if (CheckPrefixes.empty())
    CheckPrefixes.push_back("CHECK");
}

// Load and link the objects specified on the command line, but do not execute
// anything. Instead, attach a RuntimeDyldChecker instance and call it to
// verify the correctness of the linked memory.
static int linkAndVerify() {

  // Check for missing triple.
  if (TripleName == "") {
    llvm::errs() << "Error: -triple required when running in -verify mode.\n";
    return 1;
  }

  // Look up the target and build the disassembler.
  Triple TheTriple(Triple::normalize(TripleName));
  std::string ErrorStr;
  const Target *TheTarget =
    TargetRegistry::lookupTarget("", TheTriple, ErrorStr);
  if (!TheTarget) {
    llvm::errs() << "Error accessing target '" << TripleName << "': "
                 << ErrorStr << "\n";
    return 1;
  }
  TripleName = TheTriple.getTriple();

  std::unique_ptr<MCSubtargetInfo> STI(
    TheTarget->createMCSubtargetInfo(TripleName, "", ""));
  assert(STI && "Unable to create subtarget info!");

  std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
  assert(MRI && "Unable to create target register info!");

  std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
  assert(MAI && "Unable to create target asm info!");

  MCContext Ctx(MAI.get(), MRI.get(), nullptr);

  std::unique_ptr<MCDisassembler> Disassembler(
    TheTarget->createMCDisassembler(*STI, Ctx));
  assert(Disassembler && "Unable to create disassembler!");

  std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo());

  std::unique_ptr<MCInstPrinter> InstPrinter(
      TheTarget->createMCInstPrinter(Triple(TripleName), 0, *MAI, *MII, *MRI));

  // Load any dylibs requested on the command line.
  loadDylibs();

  // Instantiate a dynamic linker.
  TrivialMemoryManager MemMgr;
  RuntimeDyld Dyld(MemMgr, MemMgr);
  Dyld.setProcessAllSections(true);
  RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(),
                             llvm::dbgs());

  // FIXME: Preserve buffers until resolveRelocations time to work around a bug
  //        in RuntimeDyldELF.
  // This fixme should be fixed ASAP. This is a very brittle workaround.
  std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;

  // If we don't have any input files, read from stdin.
  if (!InputFileList.size())
    InputFileList.push_back("-");
  for(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
    // Load the input memory buffer.
    ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
        MemoryBuffer::getFileOrSTDIN(InputFileList[i]);

    if (std::error_code EC = InputBuffer.getError())
      return Error("unable to read input: '" + EC.message() + "'");

    ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
      ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));

    if (std::error_code EC = MaybeObj.getError())
      return Error("unable to create object file: '" + EC.message() + "'");

    ObjectFile &Obj = **MaybeObj;
    InputBuffers.push_back(std::move(*InputBuffer));

    // Load the object file
    Dyld.loadObject(Obj);
    if (Dyld.hasError()) {
      return Error(Dyld.getErrorString());
    }
  }

  // Re-map the section addresses into the phony target address space.
  remapSections(TheTriple, MemMgr, Checker);

  // Resolve all the relocations we can.
  Dyld.resolveRelocations();

  // Register EH frames.
  Dyld.registerEHFrames();

  int ErrorCode = checkAllExpressions(Checker);
  if (Dyld.hasError()) {
    errs() << "RTDyld reported an error applying relocations:\n  "
           << Dyld.getErrorString() << "\n";
    ErrorCode = 1;
//.........这里部分代码省略.........

static int executeInput() {
  // Load any dylibs requested on the command line.
  loadDylibs();

  // Instantiate a dynamic linker.
  TrivialMemoryManager MemMgr;
  RuntimeDyld Dyld(MemMgr, MemMgr);

  // FIXME: Preserve buffers until resolveRelocations time to work around a bug
  //        in RuntimeDyldELF.
  // This fixme should be fixed ASAP. This is a very brittle workaround.
  std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;

  // If we don't have any input files, read from stdin.
  if (!InputFileList.size())
    InputFileList.push_back("-");
  for(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
    // Load the input memory buffer.
    ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
        MemoryBuffer::getFileOrSTDIN(InputFileList[i]);
    if (std::error_code EC = InputBuffer.getError())
      return Error("unable to read input: '" + EC.message() + "'");
    ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
      ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));

    if (std::error_code EC = MaybeObj.getError())
      return Error("unable to create object file: '" + EC.message() + "'");

    ObjectFile &Obj = **MaybeObj;
    InputBuffers.push_back(std::move(*InputBuffer));

    // Load the object file
    Dyld.loadObject(Obj);
    if (Dyld.hasError()) {
      return Error(Dyld.getErrorString());
    }
  }

  // Resolve all the relocations we can.
  Dyld.resolveRelocations();
  // Clear instruction cache before code will be executed.
  MemMgr.invalidateInstructionCache();

  // FIXME: Error out if there are unresolved relocations.

  // Get the address of the entry point (_main by default).
  void *MainAddress = Dyld.getSymbolLocalAddress(EntryPoint);
  if (!MainAddress)
    return Error("no definition for '" + EntryPoint + "'");

  // Invalidate the instruction cache for each loaded function.
  for (unsigned i = 0, e = MemMgr.FunctionMemory.size(); i != e; ++i) {
    sys::MemoryBlock &Data = MemMgr.FunctionMemory[i];
    // Make sure the memory is executable.
    std::string ErrorStr;
    sys::Memory::InvalidateInstructionCache(Data.base(), Data.size());
    if (!sys::Memory::setExecutable(Data, &ErrorStr))
      return Error("unable to mark function executable: '" + ErrorStr + "'");
  }

  // Dispatch to _main().
  errs() << "loaded '" << EntryPoint << "' at: " << (void*)MainAddress << "\n";

  int (*Main)(int, const char**) =
    (int(*)(int,const char**)) uintptr_t(MainAddress);
  const char **Argv = new const char*[2];
  // Use the name of the first input object module as argv[0] for the target.
  Argv[0] = InputFileList[0].c_str();
  Argv[1] = nullptr;
  return Main(1, Argv);
}

    // Returns true on error.
    static bool format(StringRef FileName) {
      ErrorOr<std::unique_ptr<MemoryBuffer>> CodeOrErr =
        MemoryBuffer::getFileOrSTDIN(FileName);
      if (std::error_code EC = CodeOrErr.getError()) {
        llvm::errs() << EC.message() << "\n";
        return true;
      }
      std::unique_ptr<llvm::MemoryBuffer> Code = std::move(CodeOrErr.get());
      if (Code->getBufferSize() == 0)
        return false; // Empty files are formatted correctly.

      FormatterDocument Doc(std::move(Code));

      if (!Offsets.empty() || !Lengths.empty()) {
        if (Offsets.size() != Lengths.size()) {
          llvm::errs() << "error: number of offsets not equal to number of lengths.\n";
          return true;
        }

        for ( unsigned i=0 ; i < Offsets.size() ; i++ ) {
          unsigned FromLine = Doc.getLineAndColumn(Offsets[i]).first;
          unsigned ToLine = Doc.getLineAndColumn(Offsets[i] + Lengths[i]).first;
          if (ToLine == 0) {
            llvm::errs() << "error: offset + length after end of file\n";
            return true;
          }
          std::ostringstream s;
          s << FromLine << ":" << ToLine;
          LineRanges.push_back(s.str());
        }
      }

      if (LineRanges.empty())
        LineRanges.push_back("1:999999");

      std::string Output = Doc.memBuffer().getBuffer();
      Replacements Replaces;

      for ( unsigned Range = 0 ; Range < LineRanges.size() ; Range++ ) {
        unsigned FromLine, ToLine;
        if (parseLineRange(LineRanges[Range], FromLine, ToLine)) {
          llvm::errs() << "error: invalid <start line>:<end line> pair\n";
          return true;
        }
        if (FromLine > ToLine) {
          llvm::errs() << "error: start line should be less than end line\n";
          return true;
        }

        for ( unsigned Line = FromLine ; Line<=ToLine ; Line++ ) {
          size_t Offset = getOffsetOfLine(Line,Output);
          ssize_t Length = getOffsetOfLine(Line+1,Output)-1-Offset;
          if (Length < 0)
            break;

          std::string Formatted = Doc.reformat(LineRange(Line,1), FormatOptions).second;
          if (Formatted.find_first_not_of(" \t\v\f", 0) == StringRef::npos)
              Formatted = "";

          if (Formatted == Output.substr(Offset, Length))
            continue;

          Output.replace(Offset, Length, Formatted);
          Doc.updateCode(std::move(MemoryBuffer::getMemBuffer(Output)));
          Replaces.insert(clang::tooling::Replacement(FileName, Offset, Length, Formatted));
        }
      }

      if (OutputXML) {
        llvm::outs() << "<?xml version='1.0'?>\n<replacements>\n";
        outputReplacementsXML(Replaces);
        llvm::outs() << "</replacements>\n";
      } else {
        if (Inplace) {
          if (FileName == "-") {
            llvm::errs() << "error: cannot use -i when reading from stdin.\n";
            return true;
          }
          else {
            std::error_code EC;
            raw_fd_ostream writer(FileName, EC, llvm::sys::fs::F_None);
            if (EC) {
              llvm::errs() << "error: writing " << FileName << ": " << EC.message() << "\n";
              return true;
            }
            writer << Output;
          }
        } else {
          llvm::outs() << Output;
        }
      }

      return false;
    }

static int printLineInfoForInput(bool LoadObjects, bool UseDebugObj) {
  assert(LoadObjects || !UseDebugObj);

  // Load any dylibs requested on the command line.
  loadDylibs();

  // If we don't have any input files, read from stdin.
  if (!InputFileList.size())
    InputFileList.push_back("-");
  for(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
    // Instantiate a dynamic linker.
    TrivialMemoryManager MemMgr;
    RuntimeDyld Dyld(MemMgr, MemMgr);

    // Load the input memory buffer.

    ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
        MemoryBuffer::getFileOrSTDIN(InputFileList[i]);
    if (std::error_code EC = InputBuffer.getError())
      return Error("unable to read input: '" + EC.message() + "'");

    ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
      ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));

    if (std::error_code EC = MaybeObj.getError())
      return Error("unable to create object file: '" + EC.message() + "'");

    ObjectFile &Obj = **MaybeObj;

    OwningBinary<ObjectFile> DebugObj;
    std::unique_ptr<RuntimeDyld::LoadedObjectInfo> LoadedObjInfo = nullptr;
    ObjectFile *SymbolObj = &Obj;
    if (LoadObjects) {
      // Load the object file
      LoadedObjInfo =
        Dyld.loadObject(Obj);

      if (Dyld.hasError())
        return Error(Dyld.getErrorString());

      // Resolve all the relocations we can.
      Dyld.resolveRelocations();

      if (UseDebugObj) {
        DebugObj = LoadedObjInfo->getObjectForDebug(Obj);
        SymbolObj = DebugObj.getBinary();
        LoadedObjInfo.reset();
      }
    }

    std::unique_ptr<DIContext> Context(
      new DWARFContextInMemory(*SymbolObj,LoadedObjInfo.get()));

    std::vector<std::pair<SymbolRef, uint64_t>> SymAddr =
        object::computeSymbolSizes(*SymbolObj);

    // Use symbol info to iterate functions in the object.
    for (const auto &P : SymAddr) {
      object::SymbolRef Sym = P.first;
      if (Sym.getType() == object::SymbolRef::ST_Function) {
        ErrorOr<StringRef> Name = Sym.getName();
        if (!Name)
          continue;
        ErrorOr<uint64_t> AddrOrErr = Sym.getAddress();
        if (!AddrOrErr)
          continue;
        uint64_t Addr = *AddrOrErr;

        uint64_t Size = P.second;
        // If we're not using the debug object, compute the address of the
        // symbol in memory (rather than that in the unrelocated object file)
        // and use that to query the DWARFContext.
        if (!UseDebugObj && LoadObjects) {
          object::section_iterator Sec(SymbolObj->section_end());
          Sym.getSection(Sec);
          StringRef SecName;
          Sec->getName(SecName);
          uint64_t SectionLoadAddress =
            LoadedObjInfo->getSectionLoadAddress(*Sec);
          if (SectionLoadAddress != 0)
            Addr += SectionLoadAddress - Sec->getAddress();
        }

        outs() << "Function: " << *Name << ", Size = " << Size
               << ", Addr = " << Addr << "\n";

        DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size);
        DILineInfoTable::iterator  Begin = Lines.begin();
        DILineInfoTable::iterator  End = Lines.end();
        for (DILineInfoTable::iterator It = Begin; It != End; ++It) {
          outs() << "  Line info @ " << It->first - Addr << ": "
                 << It->second.FileName << ", line:" << It->second.Line << "\n";
        }
      }
    }
  }

  return 0;
}

/// EmitShellScript - Output the wrapper file that invokes the JIT on the LLVM
/// bitcode file for the program.
static void EmitShellScript(char **argv, Module *M) {
  if (Verbose)
    errs() << "Emitting Shell Script\n";
#if defined(_WIN32)
  // Windows doesn't support #!/bin/sh style shell scripts in .exe files.  To
  // support windows systems, we copy the llvm-stub.exe executable from the
  // build tree to the destination file.
  std::string ErrMsg;
  sys::Path llvmstub = PrependMainExecutablePath("llvm-stub", argv[0],
                                                 (void *)(intptr_t)&Optimize);
  if (llvmstub.isEmpty())
    PrintAndExit("Could not find llvm-stub.exe executable!", M);

  if (0 != sys::CopyFile(sys::Path(OutputFilename), llvmstub, &ErrMsg))
    PrintAndExit(ErrMsg, M);

  return;
#endif

  // Output the script to start the program...
  std::string ErrorInfo;
  tool_output_file Out2(OutputFilename.c_str(), ErrorInfo);
  if (!ErrorInfo.empty())
    PrintAndExit(ErrorInfo, M);

  Out2.os() << "#!/bin/sh\n";
  // Allow user to setenv LLVMINTERP if lli is not in their PATH.
  Out2.os() << "lli=${LLVMINTERP-lli}\n";
  Out2.os() << "exec $lli \\\n";
  // gcc accepts -l<lib> and implicitly searches /lib and /usr/lib.
  LibPaths.push_back("/lib");
  LibPaths.push_back("/usr/lib");
  LibPaths.push_back("/usr/X11R6/lib");
  // We don't need to link in libc! In fact, /usr/lib/libc.so may not be a
  // shared object at all! See RH 8: plain text.
  std::vector<std::string>::iterator libc =
    std::find(Libraries.begin(), Libraries.end(), "c");
  if (libc != Libraries.end()) Libraries.erase(libc);
  // List all the shared object (native) libraries this executable will need
  // on the command line, so that we don't have to do this manually!
  for (std::vector<std::string>::iterator i = Libraries.begin(),
         e = Libraries.end(); i != e; ++i) {
    // try explicit -L arguments first:
    sys::Path FullLibraryPath;
    for (cl::list<std::string>::const_iterator P = LibPaths.begin(),
           E = LibPaths.end(); P != E; ++P) {
      FullLibraryPath = *P;
      FullLibraryPath.appendComponent("lib" + *i);
      FullLibraryPath.appendSuffix(sys::Path::GetDLLSuffix());
      if (!FullLibraryPath.isEmpty()) {
        if (!FullLibraryPath.isDynamicLibrary()) {
          // Not a native shared library; mark as invalid
          FullLibraryPath = sys::Path();
        } else break;
      }
    }
    if (FullLibraryPath.isEmpty())
      FullLibraryPath = sys::Path::FindLibrary(*i);
    if (!FullLibraryPath.isEmpty())
      Out2.os() << "    -load=" << FullLibraryPath.str() << " \\\n";
  }
  Out2.os() << "    "  << BitcodeOutputFilename << " ${1+\"[email protected]\"}\n";
  Out2.keep();
}