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/ADT/StringRef.h"
11 #include "llvm/Support/ErrorHandling.h"
12 #include "llvm/Support/ManagedStatic.h"
13 #include "llvm/Support/PrettyStackTrace.h"
14 #include "llvm/Support/Signals.h"
15 #include "llvm/Support/SwapByteOrder.h"
16
17 #ifdef _WIN32
18 #include "llvm/Support/Error.h"
19 #include "llvm/Support/Windows/WindowsSupport.h"
20 #endif
21
22 using namespace llvm;
23 using namespace llvm::sys;
24
InitLLVM(int & Argc,const char ** & Argv,bool InstallPipeSignalExitHandler)25 InitLLVM::InitLLVM(int &Argc, const char **&Argv,
26 bool InstallPipeSignalExitHandler) {
27 if (InstallPipeSignalExitHandler)
28 // The pipe signal handler must be installed before any other handlers are
29 // registered. This is because the Unix \ref RegisterHandlers function does
30 // not perform a sigaction() for SIGPIPE unless a one-shot handler is
31 // present, to allow long-lived processes (like lldb) to fully opt-out of
32 // llvm's SIGPIPE handling and ignore the signal safely.
33 sys::SetOneShotPipeSignalFunction(sys::DefaultOneShotPipeSignalHandler);
34 // Initialize the stack printer after installing the one-shot pipe signal
35 // handler, so we can perform a sigaction() for SIGPIPE on Unix if requested.
36 StackPrinter.emplace(Argc, Argv);
37 sys::PrintStackTraceOnErrorSignal(Argv[0]);
38 install_out_of_memory_new_handler();
39
40 #ifdef _WIN32
41 // We use UTF-8 as the internal character encoding. On Windows,
42 // arguments passed to main() may not be encoded in UTF-8. In order
43 // to reliably detect encoding of command line arguments, we use an
44 // Windows API to obtain arguments, convert them to UTF-8, and then
45 // write them back to the Argv vector.
46 //
47 // There's probably other way to do the same thing (e.g. using
48 // wmain() instead of main()), but this way seems less intrusive
49 // than that.
50 std::string Banner = std::string(Argv[0]) + ": ";
51 ExitOnError ExitOnErr(Banner);
52
53 ExitOnErr(errorCodeToError(windows::GetCommandLineArguments(Args, Alloc)));
54
55 // GetCommandLineArguments doesn't terminate the vector with a
56 // nullptr. Do it to make it compatible with the real argv.
57 Args.push_back(nullptr);
58
59 Argc = Args.size() - 1;
60 Argv = Args.data();
61 #endif
62 }
63
~InitLLVM()64 InitLLVM::~InitLLVM() { llvm_shutdown(); }
65