[libc++] Introduce the _LIBCPP_VERBOSE_TRAP macro (#148262)

Split out the calls to __builtin_verbose_trap into a separate header.
This is just a refactoring to make the code a bit more structured.

Author: var-const

libcxx/include/CMakeLists.txt

@@ -944,6 +944,7 @@ set(files
   __vector/vector_bool.h
   __vector/vector_bool_formatter.h
   __verbose_abort
+  __verbose_trap
   algorithm
   any
   array
@@ -1569,6 +1570,7 @@ set(files
   __cxx03/__utility/unreachable.h
   __cxx03/__variant/monostate.h
   __cxx03/__verbose_abort
+  __cxx03/__verbose_trap
   __cxx03/algorithm
   __cxx03/array
   __cxx03/atomic

libcxx/include/__cxx03/__verbose_trap

@@ -0,0 +1,36 @@
+// -*- 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___CXX03___VERBOSE_TRAP
+#define _LIBCPP___CXX03___VERBOSE_TRAP
+
+#include <__cxx03/__config>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#if __has_builtin(__builtin_verbose_trap)
+// AppleClang shipped a slightly different version of __builtin_verbose_trap from the upstream
+// version before upstream Clang actually got the builtin.
+// TODO: Remove once AppleClang supports the two-arguments version of the builtin.
+#  if defined(_LIBCPP_APPLE_CLANG_VER) && _LIBCPP_APPLE_CLANG_VER < 1700
+#    define _LIBCPP_VERBOSE_TRAP(message) __builtin_verbose_trap(message)
+#  else
+#    define _LIBCPP_VERBOSE_TRAP(message) __builtin_verbose_trap("libc++", message)
+#  endif
+#else
+#  define _LIBCPP_VERBOSE_TRAP(message) ((void)message, __builtin_trap())
+#endif
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___CXX03___VERBOSE_TRAP

libcxx/include/__verbose_trap

@@ -0,0 +1,36 @@
+// -*- 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_TRAP
+#define _LIBCPP___VERBOSE_TRAP
+
+#include <__config>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#if __has_builtin(__builtin_verbose_trap)
+// AppleClang shipped a slightly different version of __builtin_verbose_trap from the upstream
+// version before upstream Clang actually got the builtin.
+// TODO: Remove once AppleClang supports the two-arguments version of the builtin.
+#  if defined(_LIBCPP_APPLE_CLANG_VER) && _LIBCPP_APPLE_CLANG_VER < 1700
+#    define _LIBCPP_VERBOSE_TRAP(message) __builtin_verbose_trap(message)
+#  else
+#    define _LIBCPP_VERBOSE_TRAP(message) __builtin_verbose_trap("libc++", message)
+#  endif
+#else
+#  define _LIBCPP_VERBOSE_TRAP(message) ((void)message, __builtin_trap())
+#endif
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___VERBOSE_TRAP

libcxx/include/module.modulemap.in

@@ -2356,6 +2356,9 @@ module std [system] {
   module verbose_abort {
     header "__verbose_abort"
   }
+  module verbose_trap {
+    header "__verbose_trap"
+  }
   module internal_assert {
     header "__assert"
     export *

libcxx/vendor/llvm/default_assertion_handler.in

@@ -13,9 +13,11 @@
 #if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 #  include <__cxx03/__config>
 #  include <__cxx03/__verbose_abort>
+#  include <__cxx03/__verbose_trap>
 #else
 #  include <__config>
 #  include <__verbose_abort>
+#  include <__verbose_trap>
 #endif
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -28,18 +30,7 @@
 
 #else
 
-#  if __has_builtin(__builtin_verbose_trap)
-// AppleClang shipped a slightly different version of __builtin_verbose_trap from the upstream
-// version before upstream Clang actually got the builtin.
-// TODO: Remove once AppleClang supports the two-arguments version of the builtin.
-#    if defined(_LIBCPP_APPLE_CLANG_VER) && _LIBCPP_APPLE_CLANG_VER < 1700
-#      define _LIBCPP_ASSERTION_HANDLER(message) __builtin_verbose_trap(message)
-#    else
-#      define _LIBCPP_ASSERTION_HANDLER(message) __builtin_verbose_trap("libc++", message)
-#    endif
-#  else
-#    define _LIBCPP_ASSERTION_HANDLER(message) ((void)message, __builtin_trap())
-#  endif
+#  define _LIBCPP_ASSERTION_HANDLER(message) _LIBCPP_VERBOSE_TRAP(message)
 
 #endif // _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_DEBUG