1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/* Copyright (C) 1999,2001-2003,2005,2006,2009 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <assert.h>
#include <stdlib.h>
#include <atomic.h>
#include "exit.h"
#include <fork.h>
#include <sysdep.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
}
|
