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/* Host/device compatibility: Itanium C++ ABI, DSO Object Destruction API
Copyright (C) 2025 Free Software Foundation, Inc.
This file is part of the GNU Offloading and Multi Processing Library
(libgomp).
Libgomp is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "libgomp.h"
extern void __cxa_finalize (void *);
/* See <https://itanium-cxx-abi.github.io/cxx-abi/abi.html#dso-dtor>.
Even if the device is '!DEFAULT_USE_CXA_ATEXIT', we may see '__cxa_atexit'
calls, referencing '__dso_handle', via a 'DEFAULT_USE_CXA_ATEXIT' host.
'__cxa_atexit' is provided by newlib, but use of '__dso_handle' for nvptx
results in 'ld' error:
unresolved symbol __dso_handle
collect2: error: ld returned 1 exit status
nvptx mkoffload: fatal error: [...]/x86_64-pc-linux-gnu-accel-nvptx-none-gcc returned 1 exit status
..., or for GCN get an implicit definition (running with
'--trace-symbol=__dso_handle'):
./a.xamdgcn-amdhsa.mkoffload.hsaco-a.xamdgcn-amdhsa.mkoffload.2.o: reference to __dso_handle
<internal>: definition of __dso_handle
..., which might be fine, but let's just make it explicit. */
/* There are no DSOs; this is the main program. */
attribute_hidden void * const __dso_handle = 0;
/* If this file gets linked in, that means that '__dso_handle' has been
referenced (for '__cxa_atexit'), and in that case, we also have to run
'__cxa_finalize'. Make that happen by overriding the weak libgcc dummy
function '__GCC_offload___cxa_finalize'. */
void
__GCC_offload___cxa_finalize (void *dso_handle)
{
__cxa_finalize (dso_handle);
}
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