LLVM  9.0.0svn
InitLLVM.cpp
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1 //===-- InitLLVM.cpp -----------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/Support/InitLLVM.h"
11 #include "llvm/Support/Error.h"
14 #include "llvm/Support/Process.h"
15 #include "llvm/Support/Signals.h"
16 #include <string>
17 
18 #ifdef _WIN32
19 #include "Windows/WindowsSupport.h"
20 #endif
21 
22 using namespace llvm;
23 using namespace llvm::sys;
24 
25 InitLLVM::InitLLVM(int &Argc, const char **&Argv) : StackPrinter(Argc, Argv) {
27 
28 #ifdef _WIN32
29  // We use UTF-8 as the internal character encoding. On Windows,
30  // arguments passed to main() may not be encoded in UTF-8. In order
31  // to reliably detect encoding of command line arguments, we use an
32  // Windows API to obtain arguments, convert them to UTF-8, and then
33  // write them back to the Argv vector.
34  //
35  // There's probably other way to do the same thing (e.g. using
36  // wmain() instead of main()), but this way seems less intrusive
37  // than that.
38  std::string Banner = std::string(Argv[0]) + ": ";
39  ExitOnError ExitOnErr(Banner);
40 
41  ExitOnErr(errorCodeToError(windows::GetCommandLineArguments(Args, Alloc)));
42 
43  // GetCommandLineArguments doesn't terminate the vector with a
44  // nullptr. Do it to make it compatible with the real argv.
45  Args.push_back(nullptr);
46 
47  Argc = Args.size() - 1;
48  Argv = Args.data();
49 #endif
50 }
51 
std::error_code GetCommandLineArguments(SmallVectorImpl< const char *> &Args, BumpPtrAllocator &Alloc)
This class represents lattice values for constants.
Definition: AllocatorList.h:24
void push_back(const T &Elt)
Definition: SmallVector.h:218
Helper for check-and-exit error handling.
Definition: Error.h:1225
InitLLVM(int &Argc, const char **&Argv)
Definition: InitLLVM.cpp:25
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:88
size_t size() const
Definition: SmallVector.h:53
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:149