1// -*- C++ -*- 2//===----------------------------------------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP___VERBOSE_ABORT 11#define _LIBCPP___VERBOSE_ABORT 12 13#include <__config> 14 15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16# pragma GCC system_header 17#endif 18 19_LIBCPP_BEGIN_NAMESPACE_STD 20 21// This function should never be called directly from the code -- it should only be called through 22// the _LIBCPP_VERBOSE_ABORT macro. 23_LIBCPP_NORETURN _LIBCPP_AVAILABILITY_VERBOSE_ABORT _LIBCPP_OVERRIDABLE_FUNC_VIS 24_LIBCPP_ATTRIBUTE_FORMAT(__printf__, 1, 2) void __libcpp_verbose_abort(const char* __format, ...); 25 26// _LIBCPP_VERBOSE_ABORT(format, args...) 27// 28// This macro is used to abort the program abnormally while providing additional diagnostic information. 29// 30// The first argument is a printf-style format string, and the remaining arguments are values to format 31// into the format-string. This macro can be customized by users to provide fine-grained control over 32// how verbose termination is triggered. 33// 34// If the user does not supply their own version of the _LIBCPP_VERBOSE_ABORT macro, we pick the default 35// behavior based on whether we know the built library we're running against provides support for the 36// verbose termination handler or not. If it does, we call it. If it doesn't, we call __builtin_abort to 37// make sure that the program terminates but without taking any complex dependencies in this header. 38#if !defined(_LIBCPP_VERBOSE_ABORT) 39 40# if !_LIBCPP_AVAILABILITY_HAS_VERBOSE_ABORT 41// The decltype is there to suppress -Wunused warnings in this configuration. 42void __use(const char*, ...); 43# define _LIBCPP_VERBOSE_ABORT(...) (decltype(::std::__use(__VA_ARGS__))(), __builtin_abort()) 44# else 45# define _LIBCPP_VERBOSE_ABORT(...) ::std::__libcpp_verbose_abort(__VA_ARGS__) 46# endif 47 48#endif // !defined(_LIBCPP_VERBOSE_ABORT) 49 50_LIBCPP_END_NAMESPACE_STD 51 52#endif // _LIBCPP___VERBOSE_ABORT 53