]>
Commit | Line | Data |
---|---|---|
7d45c163 | 1 | /* Test error reporting for dlsym, dlvsym failures. |
6d7e8eda | 2 | Copyright (C) 2016-2023 Free Software Foundation, Inc. |
7d45c163 FW |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
7d45c163 FW |
18 | |
19 | #include <dlfcn.h> | |
20 | #include <gnu/lib-names.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
e91bd746 | 23 | #include <string.h> |
7d45c163 FW |
24 | |
25 | /* Used to disambiguate symbol names. */ | |
26 | static int counter; | |
27 | ||
28 | static void | |
29 | test_one (void *handle, const char *name, void *(func) (void *, const char *), | |
30 | const char *suffix) | |
31 | { | |
32 | ++counter; | |
33 | char symbol[32]; | |
34 | snprintf (symbol, sizeof (symbol), "no_such_symbol_%d", counter); | |
35 | char *expected_message; | |
36 | if (asprintf (&expected_message, ": undefined symbol: %s%s", | |
37 | symbol, suffix) < 0) | |
38 | { | |
39 | printf ("error: asprintf: %m\n"); | |
40 | abort (); | |
41 | } | |
42 | ||
43 | void *addr = func (handle, symbol); | |
44 | if (addr != NULL) | |
45 | { | |
46 | printf ("error: %s: found symbol \"no_such_symbol\"\n", name); | |
47 | abort (); | |
48 | } | |
49 | const char *message = dlerror (); | |
50 | if (message == NULL) | |
51 | { | |
52 | printf ("error: %s: missing error message\n", name); | |
53 | abort (); | |
54 | } | |
55 | const char *message_without_path = strchrnul (message, ':'); | |
56 | if (strcmp (message_without_path, expected_message) != 0) | |
57 | { | |
58 | printf ("error: %s: unexpected error message: %s\n", name, message); | |
59 | abort (); | |
60 | } | |
61 | free (expected_message); | |
62 | ||
63 | message = dlerror (); | |
64 | if (message != NULL) | |
65 | { | |
66 | printf ("error: %s: unexpected error message: %s\n", name, message); | |
67 | abort (); | |
68 | } | |
69 | } | |
70 | ||
71 | static void | |
72 | test_handles (const char *name, void *(func) (void *, const char *), | |
73 | const char *suffix) | |
74 | { | |
75 | test_one (RTLD_DEFAULT, name, func, suffix); | |
76 | test_one (RTLD_NEXT, name, func, suffix); | |
77 | ||
78 | void *handle = dlopen (LIBC_SO, RTLD_LAZY); | |
79 | if (handle == NULL) | |
80 | { | |
81 | printf ("error: cannot dlopen %s: %s\n", LIBC_SO, dlerror ()); | |
82 | abort (); | |
83 | } | |
84 | test_one (handle, name, func, suffix); | |
85 | dlclose (handle); | |
86 | } | |
87 | ||
88 | static void * | |
89 | dlvsym_no_such_version (void *handle, const char *name) | |
90 | { | |
91 | return dlvsym (handle, name, "NO_SUCH_VERSION"); | |
92 | } | |
93 | ||
94 | static void * | |
95 | dlvsym_glibc_private (void *handle, const char *name) | |
96 | { | |
97 | return dlvsym (handle, name, "GLIBC_PRIVATE"); | |
98 | } | |
99 | ||
100 | static int | |
101 | do_test (void) | |
102 | { | |
103 | test_handles ("dlsym", dlsym, ""); | |
104 | test_handles ("dlvsym", dlvsym_no_such_version, | |
105 | ", version NO_SUCH_VERSION"); | |
106 | test_handles ("dlvsym", dlvsym_glibc_private, | |
107 | ", version GLIBC_PRIVATE"); | |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
112 | ||
36fe25fd | 113 | #include <support/test-driver.c> |