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 | extern void c_function (void); |
67 | extern char *dirname (const char *__filename); |
68 | |
69 | int |
70 | main (int argc, char **argv) |
71 | { |
72 | void *obj; |
73 | const char *loaded[] = { NULL, NULL, NULL}; |
74 | int errors = 0; |
75 | void (*f) (void); |
76 | const char *dir = dirname (filename: argv [0]); |
77 | char *oldfilename; |
78 | char *newfilename; |
79 | |
80 | c_function (); |
81 | |
82 | printf (format: "\nThis is what is in memory now:\n" ); |
83 | errors += check_loaded_objects (loaded); |
84 | |
85 | printf( format: "Loading shared object neededobj6.so\n" ); |
86 | obj = dlopen( file: "neededobj6.so" , RTLD_LAZY); |
87 | if (obj == NULL) |
88 | { |
89 | printf (format: "%s\n" , dlerror ()); |
90 | exit (status: 1); |
91 | } |
92 | f = dlsym (handle: obj, name: "a2_function" ); |
93 | if (f == NULL) |
94 | { |
95 | printf (format: "%s\n" , dlerror ()); |
96 | exit (status: 1); |
97 | } |
98 | f (); |
99 | loaded[0] = "neededobj5.so" ; |
100 | loaded[1] = "neededobj6.so" ; |
101 | errors += check_loaded_objects (loaded); |
102 | |
103 | printf (format: "Closing neededobj6.so\n" ); |
104 | dlclose (handle: obj); |
105 | loaded[0] = NULL; |
106 | errors += check_loaded_objects (loaded); |
107 | |
108 | printf (format: "Rename neededobj5.so\n" ); |
109 | oldfilename = alloca (strlen (dir) + 1 + sizeof ("neededobj5.so" )); |
110 | strcpy (dest: oldfilename, src: dir); |
111 | strcat (dest: oldfilename, src: "/" ); |
112 | strcat (dest: oldfilename, src: "neededobj5.so" ); |
113 | newfilename = alloca (strlen (oldfilename) + sizeof (".renamed" )); |
114 | strcpy (dest: newfilename, src: oldfilename); |
115 | strcat (dest: newfilename, src: ".renamed" ); |
116 | if (rename (old: oldfilename, new: newfilename)) |
117 | { |
118 | perror (s: "rename" ); |
119 | exit (status: 1); |
120 | } |
121 | |
122 | printf( format: "Loading shared object neededobj6.so\n" ); |
123 | obj = dlopen( file: "neededobj6.so" , RTLD_LAZY); |
124 | if (obj == NULL) |
125 | printf (format: "%s\n" , dlerror ()); |
126 | else |
127 | { |
128 | printf (format: "neededobj6.so should fail to load\n" ); |
129 | exit (status: 1); |
130 | } |
131 | |
132 | printf( format: "Loading shared object neededobj1.so\n" ); |
133 | obj = dlopen( file: "neededobj1.so" , RTLD_LAZY); |
134 | if (obj == NULL) |
135 | { |
136 | printf (format: "%s\n" , dlerror ()); |
137 | exit (status: 1); |
138 | } |
139 | errors += check_loaded_objects (loaded); |
140 | f = dlsym (handle: obj, name: "c_function" ); |
141 | if (f == NULL) |
142 | { |
143 | printf (format: "%s\n" , dlerror ()); |
144 | exit (status: 1); |
145 | } |
146 | f (); |
147 | |
148 | printf (format: "Restore neededobj5.so\n" ); |
149 | if (rename (old: newfilename, new: oldfilename)) |
150 | { |
151 | perror (s: "rename" ); |
152 | exit (status: 1); |
153 | } |
154 | |
155 | if (errors != 0) |
156 | printf (format: "%d errors found\n" , errors); |
157 | return errors; |
158 | } |
159 | |