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2b778ceb | 1 | /* Copyright (C) 1991-2021 Free Software Foundation, Inc. |
10dc2a90 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
10dc2a90 | 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. | |
28f540f4 | 8 | |
10dc2a90 UD |
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. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
28f540f4 | 17 | |
8e67b39e | 18 | #include <assert.h> |
28f540f4 RM |
19 | #include <stdlib.h> |
20 | #include "exit.h" | |
a3c88553 | 21 | #include <sysdep.h> |
28f540f4 RM |
22 | |
23 | /* Register a function to be called by exit. */ | |
24 | int | |
10dc2a90 | 25 | __on_exit (void (*func) (int status, void *arg), void *arg) |
28f540f4 | 26 | { |
26e70aec PP |
27 | struct exit_function *new; |
28 | ||
8e67b39e PP |
29 | /* As a QoI issue we detect NULL early with an assertion instead |
30 | of a SIGSEGV at program exit when the handler is run (bug 20544). */ | |
31 | assert (func != NULL); | |
32 | ||
26e70aec PP |
33 | __libc_lock_lock (__exit_funcs_lock); |
34 | new = __new_exitfn (&__exit_funcs); | |
28f540f4 RM |
35 | |
36 | if (new == NULL) | |
26e70aec PP |
37 | { |
38 | __libc_lock_unlock (__exit_funcs_lock); | |
39 | return -1; | |
40 | } | |
28f540f4 | 41 | |
a3c88553 UD |
42 | #ifdef PTR_MANGLE |
43 | PTR_MANGLE (func); | |
44 | #endif | |
28f540f4 RM |
45 | new->func.on.fn = func; |
46 | new->func.on.arg = arg; | |
a3c88553 | 47 | new->flavor = ef_on; |
26e70aec | 48 | __libc_lock_unlock (__exit_funcs_lock); |
28f540f4 RM |
49 | return 0; |
50 | } | |
10dc2a90 | 51 | weak_alias (__on_exit, on_exit) |