1 | /* Verify that RTLD_NOLOAD works as expected. |
2 | |
3 | Copyright (C) 2016-2022 Free Software Foundation, Inc. |
4 | This file is part of the GNU C Library. |
5 | |
6 | The GNU C Library is free software; you can redistribute it and/or |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either |
9 | version 2.1 of the License, or (at your option) any later version. |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | Lesser General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, see |
18 | <https://www.gnu.org/licenses/>. */ |
19 | |
20 | #include <dlfcn.h> |
21 | #include <stdio.h> |
22 | #include <gnu/lib-names.h> |
23 | |
24 | static int |
25 | do_test (void) |
26 | { |
27 | /* Test that no object is loaded with RTLD_NOLOAD. */ |
28 | void *h1 = dlopen (LIBM_SO, RTLD_LAZY | RTLD_NOLOAD); |
29 | if (h1 != NULL) |
30 | { |
31 | printf (format: "h1: DSO has been loaded while it should have not\n" ); |
32 | return 1; |
33 | } |
34 | |
35 | /* This used to segfault in some glibc versions. */ |
36 | void *h2 = dlopen (LIBM_SO, RTLD_LAZY | RTLD_NOLOAD | RTLD_NODELETE); |
37 | if (h2 != NULL) |
38 | { |
39 | printf (format: "h2: DSO has been loaded while it should have not\n" ); |
40 | return 1; |
41 | } |
42 | |
43 | /* Test that loading an already loaded object returns the same. */ |
44 | void *h3 = dlopen (LIBM_SO, RTLD_LAZY); |
45 | if (h3 == NULL) |
46 | { |
47 | printf (format: "h3: failed to open DSO: %s\n" , dlerror ()); |
48 | return 1; |
49 | } |
50 | void *h4 = dlopen (LIBM_SO, RTLD_LAZY | RTLD_NOLOAD); |
51 | if (h4 == NULL) |
52 | { |
53 | printf (format: "h4: failed to open DSO: %s\n" , dlerror ()); |
54 | return 1; |
55 | } |
56 | if (h4 != h3) |
57 | { |
58 | printf (format: "h4: should return the same object\n" ); |
59 | return 1; |
60 | } |
61 | |
62 | /* Cleanup */ |
63 | if (dlclose (handle: h3) != 0) |
64 | { |
65 | printf (format: "h3: dlclose failed: %s\n" , dlerror ()); |
66 | return 1; |
67 | } |
68 | |
69 | return 0; |
70 | } |
71 | |
72 | #include <support/test-driver.c> |
73 | |