100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
//===- lib/Support/ErrorHandling.cpp - Callbacks for errors ---------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines an API used to indicate fatal error conditions. Non-fatal
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// errors (most of them) should be handled through LLVMContext.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/Threading.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/Config/config.h"
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#include <cassert>
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#include <cstdlib>
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#if defined(HAVE_UNISTD_H)
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# include <unistd.h>
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#endif
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#if defined(_MSC_VER)
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# include <io.h>
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# include <fcntl.h>
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#endif
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using namespace llvm;
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static fatal_error_handler_t ErrorHandler = 0;
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static void *ErrorHandlerUserData = 0;
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void llvm::install_fatal_error_handler(fatal_error_handler_t handler,
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void *user_data) {
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assert(!llvm_is_multithreaded() &&
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"Cannot register error handlers after starting multithreaded mode!\n");
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assert(!ErrorHandler && "Error handler already registered!\n");
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ErrorHandler = handler;
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ErrorHandlerUserData = user_data;
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}
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void llvm::remove_fatal_error_handler() {
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ErrorHandler = 0;
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}
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void llvm::report_fatal_error(const char *Reason) {
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report_fatal_error(Twine(Reason));
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}
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void llvm::report_fatal_error(const std::string &Reason) {
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report_fatal_error(Twine(Reason));
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}
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void llvm::report_fatal_error(StringRef Reason) {
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report_fatal_error(Twine(Reason));
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}
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void llvm::report_fatal_error(const Twine &Reason) {
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if (ErrorHandler) {
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ErrorHandler(ErrorHandlerUserData, Reason.str());
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} else {
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// Blast the result out to stderr. We don't try hard to make sure this
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// succeeds (e.g. handling EINTR) and we can't use errs() here because
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// raw ostreams can call report_fatal_error.
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SmallVector<char, 64> Buffer;
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raw_svector_ostream OS(Buffer);
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OS << "LLVM ERROR: " << Reason << "\n";
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StringRef MessageStr = OS.str();
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ssize_t written = ::write(2, MessageStr.data(), MessageStr.size());
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(void)written; // If something went wrong, we deliberately just give up.
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}
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// If we reached here, we are failing ungracefully. Run the interrupt handlers
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// to make sure any special cleanups get done, in particular that we remove
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// files registered with RemoveFileOnSignal.
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sys::RunInterruptHandlers();
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exit(1);
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}
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void llvm::llvm_unreachable_internal(const char *msg, const char *file,
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unsigned line) {
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// This code intentionally doesn't call the ErrorHandler callback, because
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// llvm_unreachable is intended to be used to indicate "impossible"
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// situations, and not legitimate runtime errors.
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if (msg)
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dbgs() << msg << "\n";
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dbgs() << "UNREACHABLE executed";
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if (file)
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dbgs() << " at " << file << ":" << line;
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dbgs() << "!\n";
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abort();
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}
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