3dee689d8f
* config/rs6000/atexit.c: New file. * config/rs6000/t-aix-cxa (LIB2ADDEH): Build atexit.c. * config/rs6000/libgcc-aix-cxa.ver (atexit): Add symbol to exports. * config/rs6000/cxa_finalize.c (catomic_compare_and_exchange_bool_acq): Negate return value. From-SVN: r229932
86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
/* Copyright (C) 1999-2015 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
|
|
}
|