1 | #include <dlfcn.h> |
2 | #include <libintl.h> |
3 | #include <link.h> |
4 | #include <stdio.h> |
5 | #include <stdlib.h> |
6 | #include <string.h> |
7 | |
8 | #define MAPS ((struct link_map *) _r_debug.r_map) |
9 | |
10 | static int |
11 | check_loaded_objects (const char **loaded) |
12 | { |
13 | struct link_map *lm; |
14 | int n; |
15 | int *found = NULL; |
16 | int errors = 0; |
17 | |
18 | for (n = 0; loaded[n]; n++) |
19 | /* NOTHING */; |
20 | |
21 | if (n) |
22 | { |
23 | found = (int *) alloca (sizeof (int) * n); |
24 | memset (s: found, c: 0, n: sizeof (int) * n); |
25 | } |
26 | |
27 | printf(format: " Name\n" ); |
28 | printf(format: " --------------------------------------------------------\n" ); |
29 | for (lm = MAPS; lm; lm = lm->l_next) |
30 | { |
31 | if (lm->l_name && lm->l_name[0]) |
32 | printf(format: " %s, count = %d\n" , lm->l_name, (int) lm->l_direct_opencount); |
33 | if (lm->l_type == lt_loaded && lm->l_name) |
34 | { |
35 | int match = 0; |
36 | for (n = 0; loaded[n] != NULL; n++) |
37 | { |
38 | if (strcmp (s1: basename (filename: loaded[n]), s2: basename (filename: lm->l_name)) == 0) |
39 | { |
40 | found[n] = 1; |
41 | match = 1; |
42 | break; |
43 | } |
44 | } |
45 | |
46 | if (match == 0) |
47 | { |
48 | ++errors; |
49 | printf (format: "ERRORS: %s is not unloaded\n" , lm->l_name); |
50 | } |
51 | } |
52 | } |
53 | |
54 | for (n = 0; loaded[n] != NULL; n++) |
55 | { |
56 | if (found[n] == 0) |
57 | { |
58 | ++errors; |
59 | printf (format: "ERRORS: %s is not loaded\n" , loaded[n]); |
60 | } |
61 | } |
62 | |
63 | return errors; |
64 | } |
65 | |
66 | int |
67 | main (void) |
68 | { |
69 | void *obj2; |
70 | void *obj3[2]; |
71 | const char *loaded[] = { NULL, NULL, NULL, NULL }; |
72 | int errors = 0; |
73 | |
74 | printf (format: "\nThis is what is in memory now:\n" ); |
75 | errors += check_loaded_objects (loaded); |
76 | printf (format: "\nLoading shared object neededobj2.so\n" ); |
77 | obj2 = dlopen (file: "neededobj2.so" , RTLD_LAZY); |
78 | if (obj2 == NULL) |
79 | { |
80 | printf (format: "%s\n" , dlerror ()); |
81 | exit (status: 1); |
82 | } |
83 | loaded[0] = "neededobj1.so" ; |
84 | loaded[1] = "neededobj2.so" ; |
85 | errors += check_loaded_objects (loaded); |
86 | printf (format: "\nLoading shared object neededobj3.so\n" ); |
87 | obj3[0] = dlopen( file: "neededobj3.so" , RTLD_LAZY); |
88 | if (obj3[0] == NULL) |
89 | { |
90 | printf (format: "%s\n" , dlerror ()); |
91 | exit (status: 1); |
92 | } |
93 | loaded[2] = "neededobj3.so" ; |
94 | errors += check_loaded_objects (loaded); |
95 | printf (format: "\nNow loading shared object neededobj3.so again\n" ); |
96 | obj3[1] = dlopen (file: "neededobj3.so" , RTLD_LAZY); |
97 | if (obj3[1] == NULL) |
98 | { |
99 | printf (format: "%s\n" , dlerror ()); |
100 | exit (status: 1); |
101 | } |
102 | errors += check_loaded_objects (loaded); |
103 | printf (format: "\nClosing neededobj3.so once\n" ); |
104 | dlclose (handle: obj3[0]); |
105 | errors += check_loaded_objects (loaded); |
106 | printf (format: "\nClosing neededobj2.so\n" ); |
107 | dlclose (handle: obj2); |
108 | errors += check_loaded_objects (loaded); |
109 | printf (format: "\nClosing neededobj3.so for the second time\n" ); |
110 | dlclose (handle: obj3[1]); |
111 | loaded[0] = NULL; |
112 | loaded[1] = NULL; |
113 | loaded[2] = NULL; |
114 | errors += check_loaded_objects (loaded); |
115 | if (errors != 0) |
116 | printf (format: "%d errors found\n" , errors); |
117 | return errors; |
118 | } |
119 | |