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1 | /* Test for unloading (really unmapping) of objects. By Franz Sirl. | |
2 | This test does not have to passed in all dlopen() et.al. implementation | |
3 | since it is not required the unloading actually happens. But we | |
4 | require it for glibc. */ | |
5 | ||
6 | #include <dlfcn.h> | |
7 | #include <link.h> | |
8 | #include <mcheck.h> | |
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | ||
12 | #define MAPS ((struct link_map *) _r_debug.r_map) | |
13 | ||
14 | #define OUT \ | |
15 | for (map = MAPS; map != NULL; map = map->l_next) \ | |
16 | if (map->l_type == lt_loaded) \ | |
17 | printf ("name = \"%s\", direct_opencount = %d\n", \ | |
18 | map->l_name, (int) map->l_direct_opencount); \ | |
19 | fflush (stdout) | |
20 | ||
21 | typedef struct | |
22 | { | |
23 | void *next; | |
24 | } strct; | |
25 | ||
26 | int | |
27 | main (void) | |
28 | { | |
29 | void *sohandle; | |
30 | strct *testdat; | |
31 | int ret; | |
32 | int result = 0; | |
33 | struct link_map *map; | |
34 | ||
35 | mtrace (); | |
36 | ||
37 | puts ("\nBefore"); | |
38 | OUT; | |
39 | ||
40 | sohandle = dlopen ("unloadmod.so", RTLD_NOW | RTLD_GLOBAL); | |
41 | if (sohandle == NULL) | |
42 | { | |
43 | printf ("*** first dlopen failed: %s\n", dlerror ()); | |
44 | exit (1); | |
45 | } | |
46 | ||
47 | puts ("\nAfter loading unloadmod.so"); | |
48 | OUT; | |
49 | ||
50 | testdat = dlsym (sohandle, "testdat"); | |
51 | testdat->next = (void *) -1; | |
52 | ||
53 | ret = dlclose (sohandle); | |
54 | if (ret != 0) | |
55 | { | |
56 | puts ("*** first dlclose failed"); | |
57 | result = 1; | |
58 | } | |
59 | ||
60 | puts ("\nAfter closing unloadmod.so"); | |
61 | OUT; | |
62 | ||
63 | sohandle = dlopen ("unloadmod.so", RTLD_NOW | RTLD_GLOBAL); | |
64 | if (sohandle == NULL) | |
65 | { | |
66 | printf ("*** second dlopen failed: %s\n", dlerror ()); | |
67 | exit (1); | |
68 | } | |
69 | ||
70 | puts ("\nAfter loading unloadmod.so the second time"); | |
71 | OUT; | |
72 | ||
73 | testdat = dlsym (sohandle, "testdat"); | |
74 | if (testdat->next == (void *) -1) | |
75 | { | |
76 | puts ("*** testdat->next == (void *) -1"); | |
77 | result = 1; | |
78 | } | |
79 | ||
80 | ret = dlclose (sohandle); | |
81 | if (ret != 0) | |
82 | { | |
83 | puts ("*** second dlclose failed"); | |
84 | result = 1; | |
85 | } | |
86 | ||
87 | puts ("\nAfter closing unloadmod.so again"); | |
88 | OUT; | |
89 | ||
90 | return result; | |
91 | } |