diff options
Diffstat (limited to 'gcc-4.9/libgcc/config/rs6000/cxa_finalize.c')
-rw-r--r-- | gcc-4.9/libgcc/config/rs6000/cxa_finalize.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/gcc-4.9/libgcc/config/rs6000/cxa_finalize.c b/gcc-4.9/libgcc/config/rs6000/cxa_finalize.c new file mode 100644 index 000000000..0f42335a4 --- /dev/null +++ b/gcc-4.9/libgcc/config/rs6000/cxa_finalize.c @@ -0,0 +1,85 @@ +/* Copyright (C) 1999-2014 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 +} |