Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- InitLLVM.h -----------------------------------------------*- C++ -*-===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_SUPPORT_INITLLVM_H

#define LLVM_SUPPORT_INITLLVM_H

#include "llvm/ADT/SmallVector.h"

#include "llvm/Support/Allocator.h"

#include "llvm/Support/PrettyStackTrace.h"

#include <optional>

// The main() functions in typical LLVM tools start with InitLLVM which does

// the following one-time initializations:

//

//  1. Setting up a signal handler so that pretty stack trace is printed out

//     if a process crashes. A signal handler that exits when a failed write to

//     a pipe occurs may optionally be installed: this is on-by-default.

//

//  2. Set up the global new-handler which is called when a memory allocation

//     attempt fails.

//

//  3. If running on Windows, obtain command line arguments using a

//     multibyte character-aware API and convert arguments into UTF-8

//     encoding, so that you can assume that command line arguments are

//     always encoded in UTF-8 on any platform.

//

// InitLLVM calls llvm_shutdown() on destruction, which cleans up

// ManagedStatic objects.

namespace llvm {

class InitLLVM {

public:

  InitLLVM(int &Argc, const char **&Argv,

           bool InstallPipeSignalExitHandler = true);

  InitLLVM(int &Argc, char **&Argv, bool InstallPipeSignalExitHandler = true)

      : InitLLVM(Argc, const_cast<const char **&>(Argv),

                 InstallPipeSignalExitHandler) {}

  ~InitLLVM();

private:

  BumpPtrAllocator Alloc;

  SmallVector<const char *, 0> Args;

  std::optional<PrettyStackTraceProgram> StackPrinter;

};

} // namespace llvm

#endif