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/ErrorHandling.h"
17 #include "llvm/Support/raw_ostream.h"
18 #include "llvm/System/Threading.h"
25 static llvm_error_handler_t ErrorHandler = 0;
26 static void *ErrorHandlerUserData = 0;
29 void llvm_install_error_handler(llvm_error_handler_t handler,
31 assert(!llvm_is_multithreaded() &&
32 "Cannot register error handlers after starting multithreaded mode!\n");
33 assert(!ErrorHandler && "Error handler already registered!\n");
34 ErrorHandler = handler;
35 ErrorHandlerUserData = user_data;
38 void llvm_remove_error_handler() {
42 void llvm_report_error(const char *reason) {
43 llvm_report_error(Twine(reason));
46 void llvm_report_error(const std::string &reason) {
47 llvm_report_error(Twine(reason));
50 void llvm_report_error(const Twine &reason) {
52 errs() << "LLVM ERROR: " << reason << "\n";
54 ErrorHandler(ErrorHandlerUserData, reason.str());
59 void llvm_unreachable_internal(const char *msg, const char *file,
61 // This code intentionally doesn't call the ErrorHandler callback, because
62 // llvm_unreachable is intended to be used to indicate "impossible"
63 // situations, and not legitimate runtime errors.
65 errs() << msg << "\n";
66 errs() << "UNREACHABLE executed";
68 errs() << " at " << file << ":" << line;