1 /* Copyright (C) 1991-2017 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
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.
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
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
24 #include "set-hooks.h"
25 DEFINE_HOOK (__libc_atexit
, (void))
28 /* Call all functions registered with `atexit' and `on_exit',
29 in the reverse of the order in which they were registered
30 perform stdio cleanup, and terminate program execution with STATUS. */
33 __run_exit_handlers (int status
, struct exit_function_list
**listp
,
34 bool run_list_atexit
, bool run_dtors
)
36 /* First, call the TLS destructors. */
38 if (&__call_tls_dtors
!= NULL
)
43 /* We do it this way to handle recursive calls to exit () made by
44 the functions registered with `atexit' and `on_exit'. We call
45 everyone on the list and use the status value in the last
47 while (*listp
!= NULL
)
49 struct exit_function_list
*cur
= *listp
;
53 const struct exit_function
*const f
=
54 &cur
->fns
[--cur
->idx
];
58 void (*onfct
) (int status
, void *arg
);
59 void (*cxafct
) (void *arg
, int status
);
65 onfct
= f
->func
.on
.fn
;
69 onfct (status
, f
->func
.on
.arg
);
79 cxafct
= f
->func
.cxa
.fn
;
81 PTR_DEMANGLE (cxafct
);
83 cxafct (f
->func
.cxa
.arg
, status
);
90 /* Don't free the last element in the chain, this is the statically
96 RUN_HOOK (__libc_atexit
, ());
105 __run_exit_handlers (status
, &__exit_funcs
, true, true);
107 libc_hidden_def (exit
)