lib/Support/InitLLVM.cpp

   1 //===-- InitLLVM.cpp -----------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/Support/InitLLVM.h"
  10 #include "llvm/Support/Error.h"
  11 #include "llvm/Support/ManagedStatic.h"
  12 #include "llvm/Support/PrettyStackTrace.h"
  13 #include "llvm/Support/Process.h"
  14 #include "llvm/Support/Signals.h"
  15 #include <string>
  16
  17 #ifdef _WIN32
  18 #include "Windows/WindowsSupport.h"
  19 #endif
  20
  21 using namespace llvm;
  22 using namespace llvm::sys;
  23
  24 InitLLVM::InitLLVM(int &Argc, const char **&Argv) : StackPrinter(Argc, Argv) {
  25   sys::PrintStackTraceOnErrorSignal(Argv[0]);
  26
  27 #ifdef _WIN32
  28   // We use UTF-8 as the internal character encoding. On Windows,
  29   // arguments passed to main() may not be encoded in UTF-8. In order
  30   // to reliably detect encoding of command line arguments, we use an
  31   // Windows API to obtain arguments, convert them to UTF-8, and then
  32   // write them back to the Argv vector.
  33   //
  34   // There's probably other way to do the same thing (e.g. using
  35   // wmain() instead of main()), but this way seems less intrusive
  36   // than that.
  37   std::string Banner = std::string(Argv[0]) + ": ";
  38   ExitOnError ExitOnErr(Banner);
  39
  40   ExitOnErr(errorCodeToError(windows::GetCommandLineArguments(Args, Alloc)));
  41
  42   // GetCommandLineArguments doesn't terminate the vector with a
  43   // nullptr.  Do it to make it compatible with the real argv.
  44   Args.push_back(nullptr);
  45
  46   Argc = Args.size() - 1;
  47   Argv = Args.data();
  48 #endif
  49 }
  50
  51 InitLLVM::~InitLLVM() { llvm_shutdown(); }