1/* Copyright (C) 2001-2022 Free Software Foundation, Inc.
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
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.
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
12 Lesser General Public License for more details.
13
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 <https://www.gnu.org/licenses/>. */
17
18#include <dlfcn.h>
19#include <stdio.h>
20#include <stdlib.h>
21
22int
23main (void)
24{
25 const char fname[] = "modcxaatexit.so";
26 void *h;
27 void (*fp) (void *);
28 int v = 0;
29
30 h = dlopen (file: fname, RTLD_LAZY);
31 if (h == NULL)
32 {
33 printf (format: "cannot open \"%s\": %s\n", fname, dlerror ());
34 exit (1);
35 }
36
37 fp = dlsym (handle: h, name: "bar");
38 if (fp == NULL)
39 {
40 printf (format: "cannot find \"bar\": %s\n", dlerror ());
41 exit (1);
42 }
43
44 fp (&v);
45
46 if (dlclose (handle: h) != 0)
47 {
48 printf (format: "cannot close \"%s\": %s\n", fname, dlerror ());
49 exit (1);
50 }
51
52 if (v != 1)
53 {
54 puts (s: "module unload didn't change `v'");
55 exit (1);
56 }
57
58 puts (s: "finishing now");
59
60 return 0;
61}
62

source code of glibc/dlfcn/tstcxaatexit.c