mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-25 15:26:07 +00:00
3c6f47d6b8
Previously, some tools such as `clang` or `lld` which require strict order for certain command-line options, such as `clang -cc1` or `lld -flavor`, would not longer work on Windows, when these tools were linked as part of `llvm-driver`. This was caused by `InitLLVM` which was part of the `*_main()` function of these tools, which in turn calls `windows::GetCommandLineArguments`. That function completly replaces argc/argv by new UTF-8 contents, so any ajustements to argc/argv made by `llvm-driver` prior to calling these tools was reset. `InitLLVM` is now called by the `llvm-driver`. Any tool that participates in (or is part of) the `llvm-driver` doesn't call `InitLLVM` anymore.
107 lines
3.8 KiB
C++
107 lines
3.8 KiB
C++
//===-- InitLLVM.cpp -----------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Support/InitLLVM.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/Support/AutoConvert.h"
|
|
#include "llvm/Support/Error.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/ManagedStatic.h"
|
|
#include "llvm/Support/PrettyStackTrace.h"
|
|
#include "llvm/Support/Signals.h"
|
|
#include "llvm/Support/SwapByteOrder.h"
|
|
|
|
#ifdef _WIN32
|
|
#include "llvm/Support/Windows/WindowsSupport.h"
|
|
#endif
|
|
|
|
#ifdef __MVS__
|
|
#include <unistd.h>
|
|
|
|
void CleanupStdHandles(void *Cookie) {
|
|
llvm::raw_ostream *Outs = &llvm::outs(), *Errs = &llvm::errs();
|
|
Outs->flush();
|
|
Errs->flush();
|
|
llvm::restoreStdHandleAutoConversion(STDIN_FILENO);
|
|
llvm::restoreStdHandleAutoConversion(STDOUT_FILENO);
|
|
llvm::restoreStdHandleAutoConversion(STDERR_FILENO);
|
|
}
|
|
#endif
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::sys;
|
|
|
|
InitLLVM::InitLLVM(int &Argc, const char **&Argv,
|
|
bool InstallPipeSignalExitHandler) {
|
|
#ifndef NDEBUG
|
|
static std::atomic<bool> Initialized{false};
|
|
assert(!Initialized && "InitLLVM was already initialized!");
|
|
Initialized = true;
|
|
#endif
|
|
#ifdef __MVS__
|
|
// Bring stdin/stdout/stderr into a known state.
|
|
sys::AddSignalHandler(CleanupStdHandles, nullptr);
|
|
#endif
|
|
if (InstallPipeSignalExitHandler)
|
|
// The pipe signal handler must be installed before any other handlers are
|
|
// registered. This is because the Unix \ref RegisterHandlers function does
|
|
// not perform a sigaction() for SIGPIPE unless a one-shot handler is
|
|
// present, to allow long-lived processes (like lldb) to fully opt-out of
|
|
// llvm's SIGPIPE handling and ignore the signal safely.
|
|
sys::SetOneShotPipeSignalFunction(sys::DefaultOneShotPipeSignalHandler);
|
|
// Initialize the stack printer after installing the one-shot pipe signal
|
|
// handler, so we can perform a sigaction() for SIGPIPE on Unix if requested.
|
|
StackPrinter.emplace(Argc, Argv);
|
|
sys::PrintStackTraceOnErrorSignal(Argv[0]);
|
|
install_out_of_memory_new_handler();
|
|
|
|
#ifdef __MVS__
|
|
|
|
// We use UTF-8 as the internal character encoding. On z/OS, all external
|
|
// output is encoded in EBCDIC. In order to be able to read all
|
|
// error messages, we turn conversion to EBCDIC on for stderr fd.
|
|
std::string Banner = std::string(Argv[0]) + ": ";
|
|
ExitOnError ExitOnErr(Banner);
|
|
|
|
// If turning on conversion for stderr fails then the error message
|
|
// may be garbled. There is no solution to this problem.
|
|
ExitOnErr(errorCodeToError(llvm::enableAutoConversion(STDERR_FILENO)));
|
|
ExitOnErr(errorCodeToError(llvm::enableAutoConversion(STDOUT_FILENO)));
|
|
#endif
|
|
|
|
#ifdef _WIN32
|
|
// We use UTF-8 as the internal character encoding. On Windows,
|
|
// arguments passed to main() may not be encoded in UTF-8. In order
|
|
// to reliably detect encoding of command line arguments, we use an
|
|
// Windows API to obtain arguments, convert them to UTF-8, and then
|
|
// write them back to the Argv vector.
|
|
//
|
|
// There's probably other way to do the same thing (e.g. using
|
|
// wmain() instead of main()), but this way seems less intrusive
|
|
// than that.
|
|
std::string Banner = std::string(Argv[0]) + ": ";
|
|
ExitOnError ExitOnErr(Banner);
|
|
|
|
ExitOnErr(errorCodeToError(windows::GetCommandLineArguments(Args, Alloc)));
|
|
|
|
// GetCommandLineArguments doesn't terminate the vector with a
|
|
// nullptr. Do it to make it compatible with the real argv.
|
|
Args.push_back(nullptr);
|
|
|
|
Argc = Args.size() - 1;
|
|
Argv = Args.data();
|
|
#endif
|
|
}
|
|
|
|
InitLLVM::~InitLLVM() {
|
|
#ifdef __MVS__
|
|
CleanupStdHandles(nullptr);
|
|
#endif
|
|
llvm_shutdown();
|
|
}
|