mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-14 11:32:34 +00:00
89e90b25e3
Prior to this change, error handling functions must be installed and removed only inside of an llvm_[start/stop]_multithreading pair. This change allows error handling functions to be installed any time, and from any thread. Reviewed by: chandlerc Differential Revision: http://reviews.llvm.org/D4140 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210937 91177308-0d34-0410-b5e6-96231b3b80d8
137 lines
4.5 KiB
C++
137 lines
4.5 KiB
C++
//===- lib/Support/ErrorHandling.cpp - Callbacks for errors ---------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines an API used to indicate fatal error conditions. Non-fatal
|
|
// errors (most of them) should be handled through LLVMContext.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm-c/Core.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/ADT/Twine.h"
|
|
#include "llvm/Config/config.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/Signals.h"
|
|
#include "llvm/Support/Mutex.h"
|
|
#include "llvm/Support/MutexGuard.h"
|
|
#include "llvm/Support/Threading.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <cassert>
|
|
#include <cstdlib>
|
|
|
|
#if defined(HAVE_UNISTD_H)
|
|
# include <unistd.h>
|
|
#endif
|
|
#if defined(_MSC_VER)
|
|
# include <io.h>
|
|
# include <fcntl.h>
|
|
#endif
|
|
|
|
using namespace llvm;
|
|
|
|
static fatal_error_handler_t ErrorHandler = nullptr;
|
|
static void *ErrorHandlerUserData = nullptr;
|
|
|
|
static sys::Mutex ErrorHandlerMutex;
|
|
|
|
void llvm::install_fatal_error_handler(fatal_error_handler_t handler,
|
|
void *user_data) {
|
|
llvm::MutexGuard Lock(ErrorHandlerMutex);
|
|
assert(!ErrorHandler && "Error handler already registered!\n");
|
|
ErrorHandler = handler;
|
|
ErrorHandlerUserData = user_data;
|
|
}
|
|
|
|
void llvm::remove_fatal_error_handler() {
|
|
llvm::MutexGuard Lock(ErrorHandlerMutex);
|
|
ErrorHandler = nullptr;
|
|
ErrorHandlerUserData = nullptr;
|
|
}
|
|
|
|
void llvm::report_fatal_error(const char *Reason, bool GenCrashDiag) {
|
|
report_fatal_error(Twine(Reason), GenCrashDiag);
|
|
}
|
|
|
|
void llvm::report_fatal_error(const std::string &Reason, bool GenCrashDiag) {
|
|
report_fatal_error(Twine(Reason), GenCrashDiag);
|
|
}
|
|
|
|
void llvm::report_fatal_error(StringRef Reason, bool GenCrashDiag) {
|
|
report_fatal_error(Twine(Reason), GenCrashDiag);
|
|
}
|
|
|
|
void llvm::report_fatal_error(const Twine &Reason, bool GenCrashDiag) {
|
|
llvm::fatal_error_handler_t handler = nullptr;
|
|
void* handlerData = nullptr;
|
|
{
|
|
// Only acquire the mutex while reading the handler, so as not to invoke a
|
|
// user-supplied callback under a lock.
|
|
llvm::MutexGuard Lock(ErrorHandlerMutex);
|
|
handler = ErrorHandler;
|
|
handlerData = ErrorHandlerUserData;
|
|
}
|
|
|
|
if (handler) {
|
|
handler(handlerData, Reason.str(), GenCrashDiag);
|
|
} else {
|
|
// Blast the result out to stderr. We don't try hard to make sure this
|
|
// succeeds (e.g. handling EINTR) and we can't use errs() here because
|
|
// raw ostreams can call report_fatal_error.
|
|
SmallVector<char, 64> Buffer;
|
|
raw_svector_ostream OS(Buffer);
|
|
OS << "LLVM ERROR: " << Reason << "\n";
|
|
StringRef MessageStr = OS.str();
|
|
ssize_t written = ::write(2, MessageStr.data(), MessageStr.size());
|
|
(void)written; // If something went wrong, we deliberately just give up.
|
|
}
|
|
|
|
// If we reached here, we are failing ungracefully. Run the interrupt handlers
|
|
// to make sure any special cleanups get done, in particular that we remove
|
|
// files registered with RemoveFileOnSignal.
|
|
sys::RunInterruptHandlers();
|
|
|
|
exit(1);
|
|
}
|
|
|
|
void llvm::llvm_unreachable_internal(const char *msg, const char *file,
|
|
unsigned line) {
|
|
// This code intentionally doesn't call the ErrorHandler callback, because
|
|
// llvm_unreachable is intended to be used to indicate "impossible"
|
|
// situations, and not legitimate runtime errors.
|
|
if (msg)
|
|
dbgs() << msg << "\n";
|
|
dbgs() << "UNREACHABLE executed";
|
|
if (file)
|
|
dbgs() << " at " << file << ":" << line;
|
|
dbgs() << "!\n";
|
|
abort();
|
|
#ifdef LLVM_BUILTIN_UNREACHABLE
|
|
// Windows systems and possibly others don't declare abort() to be noreturn,
|
|
// so use the unreachable builtin to avoid a Clang self-host warning.
|
|
LLVM_BUILTIN_UNREACHABLE;
|
|
#endif
|
|
}
|
|
|
|
static void bindingsErrorHandler(void *user_data, const std::string& reason,
|
|
bool gen_crash_diag) {
|
|
LLVMFatalErrorHandler handler =
|
|
LLVM_EXTENSION reinterpret_cast<LLVMFatalErrorHandler>(user_data);
|
|
handler(reason.c_str());
|
|
}
|
|
|
|
void LLVMInstallFatalErrorHandler(LLVMFatalErrorHandler Handler) {
|
|
install_fatal_error_handler(bindingsErrorHandler,
|
|
LLVM_EXTENSION reinterpret_cast<void *>(Handler));
|
|
}
|
|
|
|
void LLVMResetFatalErrorHandler() {
|
|
remove_fatal_error_handler();
|
|
}
|