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
check_loaded_objects(const char ** loaded)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 (found, 0, sizeof (int) * n);
25 }
26
27 printf(" Name\n");
28 printf(" --------------------------------------------------------\n");
29 for (lm = MAPS; lm; lm = lm->l_next)
30 {
31 if (lm->l_name && lm->l_name[0])
32 printf(" %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 (basename (loaded[n]), basename (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 ("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 ("ERRORS: %s is not loaded\n", loaded[n]);
60 }
61 }
62
63 return errors;
64 }
65
66 int
main(void)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 ("\nThis is what is in memory now:\n");
75 errors += check_loaded_objects (loaded);
76
77 printf( "Loading shared object neededobj3.so\n");
78 obj3 = dlopen( "neededobj3.so", RTLD_LAZY);
79 if (obj3 == NULL)
80 {
81 printf ("%s\n", dlerror ());
82 exit (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 ("Now loading shared object neededobj2.so\n");
90 obj2[0] = dlopen ("neededobj2.so", RTLD_LAZY);
91 if (obj2[0] == NULL)
92 {
93 printf ("%s\n", dlerror ());
94 exit (1);
95 }
96 errors += check_loaded_objects (loaded);
97
98 printf ("And loading shared object neededobj2.so again\n");
99 obj2[1] = dlopen ("neededobj2.so", RTLD_LAZY);
100 if (obj2[1] == NULL)
101 {
102 printf ("%s\n", dlerror ());
103 exit (1);
104 }
105 errors += check_loaded_objects (loaded);
106
107 printf ("Closing neededobj2.so for the first time\n");
108 dlclose (obj2[0]);
109 errors += check_loaded_objects (loaded);
110
111 printf ("Closing neededobj3.so\n");
112 dlclose (obj3);
113 loaded[2] = NULL;
114 errors += check_loaded_objects (loaded);
115
116 printf ("Closing neededobj2.so for the second time\n");
117 dlclose (obj2[1]);
118 loaded[0] = NULL;
119 loaded[1] = NULL;
120 errors += check_loaded_objects (loaded);
121
122 if (errors != 0)
123 printf ("%d errors found\n", errors);
124 return errors;
125 }
126