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- // -*- C++ -*-
- //===----------------------------------------------------------------------===//
- //
- // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
- // See https://llvm.org/LICENSE.txt for license information.
- // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
- //
- //===----------------------------------------------------------------------===//
- #ifndef _LIBCPP___VERBOSE_ABORT
- #define _LIBCPP___VERBOSE_ABORT
- #include <__availability>
- #include <__config>
- #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
- # pragma GCC system_header
- #endif
- _LIBCPP_BEGIN_NAMESPACE_STD
- // This function should never be called directly from the code -- it should only be called through
- // the _LIBCPP_VERBOSE_ABORT macro.
- _LIBCPP_NORETURN _LIBCPP_AVAILABILITY_VERBOSE_ABORT _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_ATTRIBUTE_FORMAT(__printf__, 1, 2)
- void __libcpp_verbose_abort(const char *__format, ...);
- // _LIBCPP_VERBOSE_ABORT(format, args...)
- //
- // This macro is used to abort the program abnormally while providing additional diagnostic information.
- //
- // The first argument is a printf-style format string, and the remaining arguments are values to format
- // into the format-string. This macro can be customized by users to provide fine-grained control over
- // how verbose termination is triggered.
- //
- // If the user does not supply their own version of the _LIBCPP_VERBOSE_ABORT macro, we pick the default
- // behavior based on whether we know the built library we're running against provides support for the
- // verbose termination handler or not. If it does, we call it. If it doesn't, we call __builtin_abort to
- // make sure that the program terminates but without taking any complex dependencies in this header.
- #if !defined(_LIBCPP_VERBOSE_ABORT)
- // Support _LIBCPP_AVAILABILITY_CUSTOM_VERBOSE_ABORT_PROVIDED until LLVM 18, but tell people
- // to move to customizing _LIBCPP_VERBOSE_ABORT instead.
- # if defined(_LIBCPP_AVAILABILITY_HAS_NO_VERBOSE_ABORT) && defined(_LIBCPP_AVAILABILITY_CUSTOM_VERBOSE_ABORT_PROVIDED)
- # undef _LIBCPP_AVAILABILITY_HAS_NO_VERBOSE_ABORT
- # warning _LIBCPP_AVAILABILITY_CUSTOM_VERBOSE_ABORT_PROVIDED is deprecated, please customize _LIBCPP_VERBOSE_ABORT instead
- # endif
- # if defined(_LIBCPP_AVAILABILITY_HAS_NO_VERBOSE_ABORT)
- // The decltype is there to suppress -Wunused warnings in this configuration.
- void __use(const char*, ...);
- # define _LIBCPP_VERBOSE_ABORT(...) (decltype(::std::__use(__VA_ARGS__))(), __builtin_abort())
- # else
- # define _LIBCPP_VERBOSE_ABORT(...) ::std::__libcpp_verbose_abort(__VA_ARGS__)
- # endif
- #endif // !defined(_LIBCPP_VERBOSE_ABORT)
- _LIBCPP_END_NAMESPACE_STD
- #endif // _LIBCPP___VERBOSE_ABORT
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