1 files changed, 57 insertions, 0 deletions
diff --git a/libcxx/include/__verbose_abort b/libcxx/include/__verbose_abort
new file mode 100644
index 000000000000..a16d75d5ac4c
--- /dev/null
+++ b/libcxx/include/__verbose_abort
@@ -0,0 +1,57 @@
+// -*- 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_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_HAS_NO_VERBOSE_ABORT_IN_LIBRARY) && defined(_LIBCPP_AVAILABILITY_CUSTOM_VERBOSE_ABORT_PROVIDED)
+#    undef _LIBCPP_HAS_NO_VERBOSE_ABORT_IN_LIBRARY
+#    warning _LIBCPP_AVAILABILITY_CUSTOM_VERBOSE_ABORT_PROVIDED is deprecated, please customize _LIBCPP_VERBOSE_ABORT instead
+#  endif
+
+#  if defined(_LIBCPP_HAS_NO_VERBOSE_ABORT_IN_LIBRARY)
+#    define _LIBCPP_VERBOSE_ABORT(...) __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