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- /* Copyright (C) 1999-2022 Free Software Foundation, Inc.
- NOTE: This source is derived from an old version taken from the GNU C
- Library (glibc).
- This file is part of GCC.
- GCC 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.
- GCC 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 <assert.h>
- #include <stdlib.h>
- #include "exit.h"
- static boolean_t
- catomic_compare_and_exchange_bool_acq (long *mem, long newval, long oldval)
- {
- return ! __atomic_compare_exchange (mem, &oldval, &newval, 0,
- __ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE);
- }
- /* If D is non-NULL, call all functions registered with `__cxa_atexit'
- with the same dso handle. Otherwise, if D is NULL, call all of the
- registered handlers. */
- void
- __cxa_finalize (void *d)
- {
- struct exit_function_list *funcs;
- restart:
- for (funcs = __exit_funcs; funcs; funcs = funcs->next)
- {
- struct exit_function *f;
- for (f = &funcs->fns[funcs->idx - 1]; f >= &funcs->fns[0]; --f)
- {
- void (*cxafn) (void *arg, int status);
- void *cxaarg;
- if ((d == NULL || d == f->func.cxa.dso_handle)
- /* We don't want to run this cleanup more than once. */
- && (cxafn = f->func.cxa.fn,
- cxaarg = f->func.cxa.arg,
- ! catomic_compare_and_exchange_bool_acq (&f->flavor, ef_free,
- ef_cxa)))
- {
- uint64_t check = __new_exitfn_called;
- #ifdef PTR_DEMANGLE
- PTR_DEMANGLE (cxafn);
- #endif
- cxafn (cxaarg, 0);
- /* It is possible that that last exit function registered
- more exit functions. Start the loop over. */
- if (__builtin_expect (check != __new_exitfn_called, 0))
- goto restart;
- }
- }
- }
- /* Remove the registered fork handlers. We do not have to
- unregister anything if the program is going to terminate anyway. */
- #ifdef UNREGISTER_ATFORK
- if (d != NULL)
- UNREGISTER_ATFORK (d);
- #endif
- }
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