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[2]; |
70 | void *obj3; |
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 | |
77 | printf( format: "Loading shared object neededobj3.so\n" ); |
78 | obj3 = dlopen( file: "neededobj3.so" , RTLD_LAZY); |
79 | if (obj3 == NULL) |
80 | { |
81 | printf (format: "%s\n" , dlerror ()); |
82 | exit (status: 1); |
83 | } |
84 | loaded[0] = "neededobj1.so" ; |
85 | loaded[1] = "neededobj2.so" ; |
86 | loaded[2] = "neededobj3.so" ; |
87 | errors += check_loaded_objects (loaded); |
88 | |
89 | printf (format: "Now loading shared object neededobj2.so\n" ); |
90 | obj2[0] = dlopen (file: "neededobj2.so" , RTLD_LAZY); |
91 | if (obj2[0] == NULL) |
92 | { |
93 | printf (format: "%s\n" , dlerror ()); |
94 | exit (status: 1); |
95 | } |
96 | errors += check_loaded_objects (loaded); |
97 | |
98 | printf (format: "And loading shared object neededobj2.so again\n" ); |
99 | obj2[1] = dlopen (file: "neededobj2.so" , RTLD_LAZY); |
100 | if (obj2[1] == NULL) |
101 | { |
102 | printf (format: "%s\n" , dlerror ()); |
103 | exit (status: 1); |
104 | } |
105 | errors += check_loaded_objects (loaded); |
106 | |
107 | printf (format: "Closing neededobj2.so for the first time\n" ); |
108 | dlclose (handle: obj2[0]); |
109 | errors += check_loaded_objects (loaded); |
110 | |
111 | printf (format: "Closing neededobj3.so\n" ); |
112 | dlclose (handle: obj3); |
113 | loaded[2] = NULL; |
114 | errors += check_loaded_objects (loaded); |
115 | |
116 | printf (format: "Closing neededobj2.so for the second time\n" ); |
117 | dlclose (handle: obj2[1]); |
118 | loaded[0] = NULL; |
119 | loaded[1] = NULL; |
120 | errors += check_loaded_objects (loaded); |
121 | |
122 | if (errors != 0) |
123 | printf (format: "%d errors found\n" , errors); |
124 | return errors; |
125 | } |
126 | |