1 //===- lib/Support/ErrorHandling.cpp - Callbacks for errors -----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines an API for error handling, it supersedes cerr+abort(), and
11 // cerr+exit() style error handling.
12 // Callbacks can be registered for these errors through this API.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/ADT/Twine.h"
16 #include "llvm/Support/Debug.h"
17 #include "llvm/Support/ErrorHandling.h"
18 #include "llvm/Support/raw_ostream.h"
19 #include "llvm/System/Threading.h"
26 static llvm_error_handler_t ErrorHandler = 0;
27 static void *ErrorHandlerUserData = 0;
30 void llvm_install_error_handler(llvm_error_handler_t handler,
32 assert(!llvm_is_multithreaded() &&
33 "Cannot register error handlers after starting multithreaded mode!\n");
34 assert(!ErrorHandler && "Error handler already registered!\n");
35 ErrorHandler = handler;
36 ErrorHandlerUserData = user_data;
39 void llvm_remove_error_handler() {
43 void llvm_report_error(const char *reason) {
44 llvm_report_error(Twine(reason));
47 void llvm_report_error(const std::string &reason) {
48 llvm_report_error(Twine(reason));
51 void llvm_report_error(const Twine &reason) {
53 errs() << "LLVM ERROR: " << reason << "\n";
55 ErrorHandler(ErrorHandlerUserData, reason.str());
60 void llvm_unreachable_internal(const char *msg, const char *file,
62 // This code intentionally doesn't call the ErrorHandler callback, because
63 // llvm_unreachable is intended to be used to indicate "impossible"
64 // situations, and not legitimate runtime errors.
66 dbgs() << msg << "\n";
67 dbgs() << "UNREACHABLE executed";
69 dbgs() << " at " << file << ":" << line;