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57707b7f | 1 | /* Bug 11941: Improper assert map->l_init_called in dlclose. |
6d7e8eda | 2 | Copyright (C) 2016-2023 Free Software Foundation, Inc. |
57707b7f CD |
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/>. */ |
57707b7f | 18 | |
630da022 | 19 | /* This is the primary DSO that is loaded by the application. This DSO |
57707b7f CD |
20 | then loads a plugin with RTLD_NODELETE. This plugin depends on this |
21 | DSO. This dependency chain means that at application shutdown the | |
22 | plugin will be destructed first. Thus by the time this DSO is | |
23 | destructed we will be calling dlclose on an object that has already | |
24 | been destructed. It is allowed to call dlclose in this way and | |
25 | should not assert. */ | |
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <dlfcn.h> | |
29 | ||
30 | /* Plugin to load. */ | |
31 | static void *plugin_lib = NULL; | |
32 | /* Plugin function. */ | |
33 | static void (*plugin_func) (void); | |
34 | #define LIB_PLUGIN "tst-nodelete-dlclose-plugin.so" | |
35 | ||
36 | /* This function is never called but the plugin references it. | |
37 | We do this to avoid any future --as-needed from removing the | |
38 | plugin's DT_NEEDED on this DSO (required for the test). */ | |
39 | void | |
40 | primary_reference (void) | |
41 | { | |
42 | printf ("INFO: Called primary_reference function.\n"); | |
43 | } | |
44 | ||
45 | void | |
46 | primary (void) | |
47 | { | |
48 | char *error; | |
49 | ||
50 | plugin_lib = dlopen (LIB_PLUGIN, RTLD_NOW | RTLD_LOCAL | RTLD_NODELETE); | |
51 | if (plugin_lib == NULL) | |
52 | { | |
53 | printf ("ERROR: Unable to load plugin library.\n"); | |
54 | exit (EXIT_FAILURE); | |
55 | } | |
56 | dlerror (); | |
57 | ||
58 | plugin_func = (void (*) (void)) dlsym (plugin_lib, "plugin_func"); | |
59 | error = dlerror (); | |
60 | if (error != NULL) | |
61 | { | |
62 | printf ("ERROR: Unable to find symbol with error \"%s\".", | |
63 | error); | |
64 | exit (EXIT_FAILURE); | |
65 | } | |
66 | ||
67 | return; | |
68 | } | |
69 | ||
70 | __attribute__ ((destructor)) | |
71 | static void | |
72 | primary_dtor (void) | |
73 | { | |
74 | int ret; | |
75 | ||
76 | printf ("INFO: Calling primary destructor.\n"); | |
77 | ||
78 | /* The destructor runs in the test driver also, which | |
79 | hasn't called primary, in that case do nothing. */ | |
80 | if (plugin_lib == NULL) | |
81 | return; | |
82 | ||
83 | ret = dlclose (plugin_lib); | |
84 | if (ret != 0) | |
85 | { | |
86 | printf ("ERROR: Calling dlclose failed with \"%s\"\n", | |
87 | dlerror ()); | |
88 | exit (EXIT_FAILURE); | |
89 | } | |
90 | } |