lib/Support/InitLLVM.cpp

   1 //===-- InitLLVM.cpp -----------------------------------------------------===//
   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 #include "llvm/Support/InitLLVM.h"
  11 #include "llvm/Support/Error.h"
  12 #include "llvm/Support/ManagedStatic.h"
  13 #include "llvm/Support/PrettyStackTrace.h"
  14 #include "llvm/Support/Process.h"
  15 #include "llvm/Support/Signals.h"
  16 #include <string>
  17
  18 #ifdef _WIN32
  19 #include "Windows/WindowsSupport.h"
  20 #endif
  21
  22 using namespace llvm;
  23 using namespace llvm::sys;
  24
  25 InitLLVM::InitLLVM(int &Argc, const char **&Argv) : StackPrinter(Argc, Argv) {
  26   sys::PrintStackTraceOnErrorSignal(Argv[0]);
  27
  28 #ifdef _WIN32
  29   // We use UTF-8 as the internal character encoding. On Windows,
  30   // arguments passed to main() may not be encoded in UTF-8. In order
  31   // to reliably detect encoding of command line arguments, we use an
  32   // Windows API to obtain arguments, convert them to UTF-8, and then
  33   // write them back to the Argv vector.
  34   //
  35   // There's probably other way to do the same thing (e.g. using
  36   // wmain() instead of main()), but this way seems less intrusive
  37   // than that.
  38   std::string Banner = std::string(Argv[0]) + ": ";
  39   ExitOnError ExitOnErr(Banner);
  40
  41   ExitOnErr(errorCodeToError(windows::GetCommandLineArguments(Args, Alloc)));
  42
  43   // GetCommandLineArguments doesn't terminate the vector with a
  44   // nullptr.  Do it to make it compatible with the real argv.
  45   Args.push_back(nullptr);
  46
  47   Argc = Args.size() - 1;
  48   Argv = Args.data();
  49 #endif
  50 }
  51
  52 InitLLVM::~InitLLVM() { llvm_shutdown(); }