mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 18:54:02 +01:00
3533461f4c
The pipe signal handler must be installed before any other handlers are registered. This is because the Unix 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. Fixes a bug introduced in D70277. Tested by running Nick's test case: % xcrun ./bin/clang -E -fno-integrated-cc1 x.c | tee foo.txt | head I verified that child cc1 process exits with IO_ERR, and that the parent recognizes the error code, exiting cleanly. Differential Revision: https://reviews.llvm.org/D94324
64 lines
2.4 KiB
C++
64 lines
2.4 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/Support/Error.h"
|
|
#include "llvm/Support/ManagedStatic.h"
|
|
#include "llvm/Support/PrettyStackTrace.h"
|
|
#include "llvm/Support/Process.h"
|
|
#include "llvm/Support/Signals.h"
|
|
#include <string>
|
|
|
|
#ifdef _WIN32
|
|
#include "llvm/Support/Windows/WindowsSupport.h"
|
|
#endif
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::sys;
|
|
|
|
InitLLVM::InitLLVM(int &Argc, const char **&Argv,
|
|
bool InstallPipeSignalExitHandler) {
|
|
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 _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() { llvm_shutdown(); }
|