1 //===- lib/Support/ErrorHandling.cpp - Callbacks for errors -----*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
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 //===----------------------------------------------------------------------===//
14 
15 #include "llvm/ADT/SmallVector.h"
16 #include "llvm/Support/ErrorHandling.h"
17 #include "llvm/Support/raw_ostream.h"
18 #include "llvm/System/Threading.h"
19 #include <cassert>
20 #include <cstdlib>
21 
22 using namespace llvm;
23 using namespace std;
24 
25 static llvm_error_handler_t ErrorHandler = 0;
26 namespace llvm {
27 void llvm_install_error_handler(llvm_error_handler_t handler) {
28   assert(!llvm_is_multithreaded() &&
29          "Cannot register error handlers after starting multithreaded mode!\n");
30   assert(!ErrorHandler && "Error handler already registered!\n");
31   ErrorHandler = handler;
32 }
33 
34 void llvm_remove_error_handler(void) {
35   ErrorHandler = 0;
36 }
37 
38 void llvm_report_error(const std::string &reason) {
39   if (!ErrorHandler) {
40     errs() << "LLVM ERROR: " << reason << "\n";
41   } else {
42     ErrorHandler(reason);
43   }
44   exit(1);
45 }
46 
47 void llvm_unreachable(void) {
48   abort();
49 }
50 }
51 
52