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 "llvm/Support/Windows/WindowsSupport.h"
19 #endif
20 
21 using namespace llvm;
22 using namespace llvm::sys;
23 
24 InitLLVM::InitLLVM(int &Argc, const char **&Argv,
25                    bool InstallPipeSignalExitHandler)
26     : StackPrinter(Argc, Argv) {
27   if (InstallPipeSignalExitHandler)
28     sys::SetOneShotPipeSignalFunction(sys::DefaultOneShotPipeSignalHandler);
29   sys::PrintStackTraceOnErrorSignal(Argv[0]);
30   install_out_of_memory_new_handler();
31 
32 #ifdef _WIN32
33   // We use UTF-8 as the internal character encoding. On Windows,
34   // arguments passed to main() may not be encoded in UTF-8. In order
35   // to reliably detect encoding of command line arguments, we use an
36   // Windows API to obtain arguments, convert them to UTF-8, and then
37   // write them back to the Argv vector.
38   //
39   // There's probably other way to do the same thing (e.g. using
40   // wmain() instead of main()), but this way seems less intrusive
41   // than that.
42   std::string Banner = std::string(Argv[0]) + ": ";
43   ExitOnError ExitOnErr(Banner);
44 
45   ExitOnErr(errorCodeToError(windows::GetCommandLineArguments(Args, Alloc)));
46 
47   // GetCommandLineArguments doesn't terminate the vector with a
48   // nullptr.  Do it to make it compatible with the real argv.
49   Args.push_back(nullptr);
50 
51   Argc = Args.size() - 1;
52   Argv = Args.data();
53 #endif
54 }
55 
56 InitLLVM::~InitLLVM() { llvm_shutdown(); }
57