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b168057a | 1 | /* Copyright (C) 1999-2015 Free Software Foundation, Inc. |
c41041bc UD |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
c41041bc UD |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
c41041bc | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
c41041bc UD |
17 | |
18 | #include <assert.h> | |
19 | #include <stdlib.h> | |
4009bf40 | 20 | #include <atomic.h> |
c41041bc | 21 | #include "exit.h" |
d1f69fed | 22 | #include <fork.h> |
a3c88553 | 23 | #include <sysdep.h> |
e054f494 | 24 | #include <stdint.h> |
c41041bc UD |
25 | |
26 | /* If D is non-NULL, call all functions registered with `__cxa_atexit' | |
4e648ea3 UD |
27 | with the same dso handle. Otherwise, if D is NULL, call all of the |
28 | registered handlers. */ | |
c41041bc UD |
29 | void |
30 | __cxa_finalize (void *d) | |
31 | { | |
32 | struct exit_function_list *funcs; | |
33 | ||
a92b1166 | 34 | restart: |
c41041bc UD |
35 | for (funcs = __exit_funcs; funcs; funcs = funcs->next) |
36 | { | |
37 | struct exit_function *f; | |
38 | ||
39 | for (f = &funcs->fns[funcs->idx - 1]; f >= &funcs->fns[0]; --f) | |
bd3754dc UD |
40 | { |
41 | void (*cxafn) (void *arg, int status); | |
a92b1166 | 42 | void *cxaarg; |
bd3754dc UD |
43 | |
44 | if ((d == NULL || d == f->func.cxa.dso_handle) | |
45 | /* We don't want to run this cleanup more than once. */ | |
46 | && (cxafn = f->func.cxa.fn, | |
a92b1166 | 47 | cxaarg = f->func.cxa.arg, |
11bf311e UD |
48 | ! catomic_compare_and_exchange_bool_acq (&f->flavor, ef_free, |
49 | ef_cxa))) | |
bd3754dc | 50 | { |
a92b1166 UD |
51 | uint64_t check = __new_exitfn_called; |
52 | ||
a3c88553 | 53 | #ifdef PTR_DEMANGLE |
bd3754dc | 54 | PTR_DEMANGLE (cxafn); |
a3c88553 | 55 | #endif |
a92b1166 UD |
56 | cxafn (cxaarg, 0); |
57 | ||
58 | /* It is possible that that last exit function registered | |
59 | more exit functions. Start the loop over. */ | |
a1ffb40e | 60 | if (__glibc_unlikely (check != __new_exitfn_called)) |
a92b1166 | 61 | goto restart; |
bd3754dc UD |
62 | } |
63 | } | |
c41041bc | 64 | } |
d1f69fed | 65 | |
610e67ed UD |
66 | /* Also remove the quick_exit handlers, but do not call them. */ |
67 | for (funcs = __quick_exit_funcs; funcs; funcs = funcs->next) | |
68 | { | |
69 | struct exit_function *f; | |
70 | ||
71 | for (f = &funcs->fns[funcs->idx - 1]; f >= &funcs->fns[0]; --f) | |
72 | if (d == NULL || d == f->func.cxa.dso_handle) | |
73 | f->flavor = ef_free; | |
74 | } | |
75 | ||
4e648ea3 UD |
76 | /* Remove the registered fork handlers. We do not have to |
77 | unregister anything if the program is going to terminate anyway. */ | |
d1f69fed | 78 | #ifdef UNREGISTER_ATFORK |
4e648ea3 UD |
79 | if (d != NULL) |
80 | UNREGISTER_ATFORK (d); | |
d1f69fed | 81 | #endif |
c41041bc | 82 | } |