1 /* Verify that an already opened DSO opened agained with RTLD_NODELETE actually
2 sets the NODELETE flag.
3
4 Copyright (C) 2015-2022 Free Software Foundation, Inc.
5 This file is part of the GNU C Library.
6
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
11
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
16
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <https://www.gnu.org/licenses/>. */
20
21 #include <dlfcn.h>
22 #include <stdio.h>
23
24 int
do_test(void)25 do_test (void)
26 {
27 void *h1 = dlopen ("$ORIGIN/tst-nodelete-opened-lib.so", RTLD_LAZY);
28 if (h1 == NULL)
29 {
30 printf ("h1: failed to open DSO: %s\n", dlerror ());
31 return 1;
32 }
33
34 void *h2 = dlopen ("$ORIGIN/tst-nodelete-opened-lib.so",
35 RTLD_LAZY | RTLD_NODELETE);
36 if (h2 == NULL)
37 {
38 printf ("h2: failed to open DSO: %s\n", dlerror ());
39 return 1;
40 }
41
42 int *foo = dlsym (h2, "foo_var");
43 if (foo == NULL)
44 {
45 printf ("failed to load symbol foo_var: %s\n", dlerror ());
46 return 1;
47 }
48
49 if (dlclose (h1) != 0)
50 {
51 printf ("h1: dlclose failed: %s\n", dlerror ());
52 return 1;
53 }
54
55 if (dlclose (h2) != 0)
56 {
57 printf ("h2: dlclose failed: %s\n", dlerror ());
58 return 1;
59 }
60
61 /* This FOO dereference will crash with a segfault if the DSO was
62 unloaded. */
63 printf ("foo == %d\n", *foo);
64
65 return 0;
66 }
67
68 #include <support/test-driver.c>
69