LLVM  9.0.0svn
InitLLVM.cpp
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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 
10 #include "llvm/Support/Error.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) {
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 
std::error_code GetCommandLineArguments(SmallVectorImpl< const char *> &Args, BumpPtrAllocator &Alloc)
This class represents lattice values for constants.
Definition: AllocatorList.h:23
void push_back(const T &Elt)
Definition: SmallVector.h:211
Helper for check-and-exit error handling.
Definition: Error.h:1230
InitLLVM(int &Argc, const char **&Argv)
Definition: InitLLVM.cpp:24
void llvm_shutdown()
llvm_shutdown - Deallocate and destroy all ManagedStatic variables.
void PrintStackTraceOnErrorSignal(StringRef Argv0, bool DisableCrashReporting=false)
When an error signal (such as SIGABRT or SIGSEGV) is delivered to the process, print a stack trace an...
Error errorCodeToError(std::error_code EC)
Helper for converting an std::error_code to a Error.
Definition: Error.cpp:87
size_t size() const
Definition: SmallVector.h:52
Provides a library for accessing information about this process and other processes on the operating ...
pointer data()
Return a pointer to the vector&#39;s buffer, even if empty().
Definition: SmallVector.h:144