LLVM 18.0.0git
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1//===-- InitLLVM.cpp -----------------------------------------------------===//
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
10#include "llvm/ADT/StringRef.h"
17#ifdef _WIN32
18#include "llvm/Support/Error.h"
22using namespace llvm;
23using namespace llvm::sys;
25InitLLVM::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.
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);
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);
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);
59 Argc = Args.size() - 1;
60 Argv = Args.data();
Helper for check-and-exit error handling.
Definition: Error.h:1353
InitLLVM(int &Argc, const char **&Argv, bool InstallPipeSignalExitHandler=true)
Definition: InitLLVM.cpp:25
size_t size() const
Definition: SmallVector.h:91
void push_back(const T &Elt)
Definition: SmallVector.h:416
pointer data()
Return a pointer to the vector's buffer, even if empty().
Definition: SmallVector.h:289
std::error_code GetCommandLineArguments(SmallVectorImpl< const char * > &Args, BumpPtrAllocator &Alloc)
void SetOneShotPipeSignalFunction(void(*Handler)())
Registers a function to be called in a "one-shot" manner when a pipe signal is delivered to the proce...
void DefaultOneShotPipeSignalHandler()
On Unix systems and Windows, this function exits with an "IO error" exit code.
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...
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
void install_out_of_memory_new_handler()
void llvm_shutdown()
llvm_shutdown - Deallocate and destroy all ManagedStatic variables.
Error errorCodeToError(std::error_code EC)
Helper for converting an std::error_code to a Error.
Definition: Error.cpp:103