1 | /* Test error reporting for dlsym, dlvsym failures. |
2 | Copyright (C) 2016-2024 Free Software Foundation, Inc. |
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 |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <dlfcn.h> |
20 | #include <gnu/lib-names.h> |
21 | #include <stdio.h> |
22 | #include <stdlib.h> |
23 | #include <string.h> |
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 (s: symbol, maxlen: sizeof (symbol), format: "no_such_symbol_%d" , counter); |
35 | char *expected_message; |
36 | if (asprintf (ptr: &expected_message, fmt: ": undefined symbol: %s%s" , |
37 | symbol, suffix) < 0) |
38 | { |
39 | printf (format: "error: asprintf: %m\n" ); |
40 | abort (); |
41 | } |
42 | |
43 | void *addr = func (handle, symbol); |
44 | if (addr != NULL) |
45 | { |
46 | printf (format: "error: %s: found symbol \"no_such_symbol\"\n" , name); |
47 | abort (); |
48 | } |
49 | const char *message = dlerror (); |
50 | if (message == NULL) |
51 | { |
52 | printf (format: "error: %s: missing error message\n" , name); |
53 | abort (); |
54 | } |
55 | const char *message_without_path = strchrnul (s: message, c: ':'); |
56 | if (strcmp (s1: message_without_path, s2: expected_message) != 0) |
57 | { |
58 | printf (format: "error: %s: unexpected error message: %s\n" , name, message); |
59 | abort (); |
60 | } |
61 | free (ptr: expected_message); |
62 | |
63 | message = dlerror (); |
64 | if (message != NULL) |
65 | { |
66 | printf (format: "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 (format: "error: cannot dlopen %s: %s\n" , LIBC_SO, dlerror ()); |
82 | abort (); |
83 | } |
84 | test_one (handle, name, func, suffix); |
85 | dlclose (handle: handle); |
86 | } |
87 | |
88 | static void * |
89 | dlvsym_no_such_version (void *handle, const char *name) |
90 | { |
91 | return dlvsym (handle: handle, name: name, version: "NO_SUCH_VERSION" ); |
92 | } |
93 | |
94 | static void * |
95 | dlvsym_glibc_private (void *handle, const char *name) |
96 | { |
97 | return dlvsym (handle: handle, name: name, version: "GLIBC_PRIVATE" ); |
98 | } |
99 | |
100 | static int |
101 | do_test (void) |
102 | { |
103 | test_handles (name: "dlsym" , func: dlsym, suffix: "" ); |
104 | test_handles (name: "dlvsym" , func: dlvsym_no_such_version, |
105 | suffix: ", version NO_SUCH_VERSION" ); |
106 | test_handles (name: "dlvsym" , func: dlvsym_glibc_private, |
107 | suffix: ", version GLIBC_PRIVATE" ); |
108 | |
109 | return 0; |
110 | } |
111 | |
112 | |
113 | #include <support/test-driver.c> |
114 | |