1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include <__config>
10#include <cstdio>
11#include <cstdlib>
12#include <string>
13
14// This file defines the legacy default debug handler and related mechanisms
15// to set it. This is for backwards ABI compatibility with code that has been
16// using this debug handler previously.
17
18_LIBCPP_BEGIN_NAMESPACE_STD
19
20struct _LIBCPP_TEMPLATE_VIS __libcpp_debug_info {
21  _LIBCPP_EXPORTED_FROM_ABI string what() const;
22
23  const char* __file_;
24  int __line_;
25  const char* __pred_;
26  const char* __msg_;
27};
28
29std::string __libcpp_debug_info::what() const {
30  string msg = __file_;
31  msg += ":" + std::to_string(__line_) + ": _LIBCPP_ASSERT '";
32  msg += __pred_;
33  msg += "' failed. ";
34  msg += __msg_;
35  return msg;
36}
37
38_LIBCPP_NORETURN _LIBCPP_EXPORTED_FROM_ABI void __libcpp_abort_debug_function(__libcpp_debug_info const& info) {
39  std::fprintf(stderr, "%s\n", info.what().c_str());
40  std::abort();
41}
42
43typedef void (*__libcpp_debug_function_type)(__libcpp_debug_info const&);
44
45_LIBCPP_EXPORTED_FROM_ABI
46constinit __libcpp_debug_function_type __libcpp_debug_function = __libcpp_abort_debug_function;
47
48_LIBCPP_EXPORTED_FROM_ABI
49bool __libcpp_set_debug_function(__libcpp_debug_function_type __func) {
50  __libcpp_debug_function = __func;
51  return true;
52}
53
54_LIBCPP_END_NAMESPACE_STD
55