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 (s: "\nBefore"); |
38 | OUT; |
39 | |
40 | sohandle = dlopen (file: "unloadmod.so", RTLD_NOW | RTLD_GLOBAL); |
41 | if (sohandle == NULL) |
42 | { |
43 | printf (format: "*** first dlopen failed: %s\n", dlerror ()); |
44 | exit (status: 1); |
45 | } |
46 | |
47 | puts (s: "\nAfter loading unloadmod.so"); |
48 | OUT; |
49 | |
50 | testdat = dlsym (handle: sohandle, name: "testdat"); |
51 | testdat->next = (void *) -1; |
52 | |
53 | ret = dlclose (handle: sohandle); |
54 | if (ret != 0) |
55 | { |
56 | puts (s: "*** first dlclose failed"); |
57 | result = 1; |
58 | } |
59 | |
60 | puts (s: "\nAfter closing unloadmod.so"); |
61 | OUT; |
62 | |
63 | sohandle = dlopen (file: "unloadmod.so", RTLD_NOW | RTLD_GLOBAL); |
64 | if (sohandle == NULL) |
65 | { |
66 | printf (format: "*** second dlopen failed: %s\n", dlerror ()); |
67 | exit (status: 1); |
68 | } |
69 | |
70 | puts (s: "\nAfter loading unloadmod.so the second time"); |
71 | OUT; |
72 | |
73 | testdat = dlsym (handle: sohandle, name: "testdat"); |
74 | if (testdat->next == (void *) -1) |
75 | { |
76 | puts (s: "*** testdat->next == (void *) -1"); |
77 | result = 1; |
78 | } |
79 | |
80 | ret = dlclose (handle: sohandle); |
81 | if (ret != 0) |
82 | { |
83 | puts (s: "*** second dlclose failed"); |
84 | result = 1; |
85 | } |
86 | |
87 | puts (s: "\nAfter closing unloadmod.so again"); |
88 | OUT; |
89 | |
90 | return result; |
91 | } |
92 |