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