| /* Copyright (C) 1999-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <assert.h> |
| #include <stdlib.h> |
| #include <atomic.h> |
| #include "exit.h" |
| #include <fork.h> |
| #include <sysdep.h> |
| #include <stdint.h> |
| |
| /* 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; |
| } |
| } |
| } |
| |
| /* Also remove the quick_exit handlers, but do not call them. */ |
| for (funcs = __quick_exit_funcs; funcs; funcs = funcs->next) |
| { |
| struct exit_function *f; |
| |
| for (f = &funcs->fns[funcs->idx - 1]; f >= &funcs->fns[0]; --f) |
| if (d == NULL || d == f->func.cxa.dso_handle) |
| f->flavor = ef_free; |
| } |
| |
| /* 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 |
| } |