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 <__availability> 14#include <__config> 15 16#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17# pragma GCC system_header 18#endif 19 20_LIBCPP_BEGIN_NAMESPACE_STD 21 22// This function should never be called directly from the code -- it should only be called through 23// the _LIBCPP_VERBOSE_ABORT macro. 24_LIBCPP_NORETURN _LIBCPP_AVAILABILITY_VERBOSE_ABORT _LIBCPP_OVERRIDABLE_FUNC_VIS 25 _LIBCPP_ATTRIBUTE_FORMAT(__printf__, 1, 2) void __libcpp_verbose_abort(const char* __format, ...); 26 27// _LIBCPP_VERBOSE_ABORT(format, args...) 28// 29// This macro is used to abort the program abnormally while providing additional diagnostic information. 30// 31// The first argument is a printf-style format string, and the remaining arguments are values to format 32// into the format-string. This macro can be customized by users to provide fine-grained control over 33// how verbose termination is triggered. 34// 35// If the user does not supply their own version of the _LIBCPP_VERBOSE_ABORT macro, we pick the default 36// behavior based on whether we know the built library we're running against provides support for the 37// verbose termination handler or not. If it does, we call it. If it doesn't, we call __builtin_abort to 38// make sure that the program terminates but without taking any complex dependencies in this header. 39#if !defined(_LIBCPP_VERBOSE_ABORT) 40 41# if !_LIBCPP_AVAILABILITY_HAS_VERBOSE_ABORT 42// The decltype is there to suppress -Wunused warnings in this configuration. 43void __use(const char*, ...); 44# define _LIBCPP_VERBOSE_ABORT(...) (decltype(::std::__use(__VA_ARGS__))(), __builtin_abort()) 45# else 46# define _LIBCPP_VERBOSE_ABORT(...) ::std::__libcpp_verbose_abort(__VA_ARGS__) 47# endif 48 49#endif // !defined(_LIBCPP_VERBOSE_ABORT) 50 51_LIBCPP_END_NAMESPACE_STD 52 53#endif // _LIBCPP___VERBOSE_ABORT 54