]>
Commit | Line | Data |
---|---|---|
2b7238dd UD |
1 | #include <dlfcn.h> |
2 | #include <mcheck.h> | |
3 | #include <stdio.h> | |
4 | #include <stdlib.h> | |
5 | ||
6 | int | |
7 | main (void) | |
8 | { | |
9 | void *h1; | |
10 | void *h2; | |
11 | int (*fp) (void); | |
12 | int *vp; | |
13 | ||
14 | mtrace (); | |
15 | ||
16 | /* Open the two objects. */ | |
17 | h1 = dlopen ("reldepmod1.so", RTLD_LAZY | RTLD_GLOBAL); | |
18 | if (h1 == NULL) | |
19 | { | |
20 | printf ("cannot open reldepmod1.so: %s\n", dlerror ()); | |
21 | exit (1); | |
22 | } | |
23 | h2 = dlopen ("reldepmod4.so", RTLD_LAZY); | |
24 | if (h2 == NULL) | |
25 | { | |
26 | printf ("cannot open reldepmod4.so: %s\n", dlerror ()); | |
27 | exit (1); | |
28 | } | |
29 | ||
30 | /* Get the address of the variable in reldepmod1.so. */ | |
31 | vp = dlsym (h1, "some_var"); | |
32 | if (vp == NULL) | |
33 | { | |
34 | printf ("cannot get address of \"some_var\": %s\n", dlerror ()); | |
35 | exit (1); | |
36 | } | |
37 | ||
38 | *vp = 42; | |
39 | ||
40 | /* Get the function `call_me' in the second object. This has a | |
41 | dependency which is resolved by a definition in reldepmod1.so. */ | |
42 | fp = dlsym (h2, "call_me"); | |
43 | if (fp == NULL) | |
44 | { | |
45 | printf ("cannot get address of \"call_me\": %s\n", dlerror ()); | |
46 | exit (1); | |
47 | } | |
48 | ||
49 | /* Call the function. */ | |
50 | if (fp () != 0) | |
51 | { | |
52 | puts ("function \"call_me\" returned wrong result"); | |
53 | exit (1); | |
54 | } | |
55 | ||
56 | /* Now close the first object. If must still be around since we have | |
c0c3f78a | 57 | an implicit dependency. */ |
2b7238dd UD |
58 | if (dlclose (h1) != 0) |
59 | { | |
60 | printf ("closing h1 failed: %s\n", dlerror ()); | |
61 | exit (1); | |
62 | } | |
63 | ||
64 | /* Open the first object again. */ | |
65 | h1 = dlopen ("reldepmod1.so", RTLD_LAZY | RTLD_GLOBAL); | |
66 | if (h1 == NULL) | |
67 | { | |
68 | printf ("cannot open reldepmod1.so the second time: %s\n", dlerror ()); | |
69 | exit (1); | |
70 | } | |
71 | ||
72 | /* Get the variable address again. */ | |
73 | vp = dlsym (h1, "some_var"); | |
74 | if (vp == NULL) | |
75 | { | |
76 | printf ("cannot get address of \"some_var\" the second time: %s\n", | |
77 | dlerror ()); | |
78 | exit (1); | |
79 | } | |
80 | ||
81 | /* The variable now must have its originial value. */ | |
82 | if (*vp != 0) | |
83 | { | |
84 | puts ("variable \"some_var\" not reset"); | |
85 | exit (1); | |
86 | } | |
87 | ||
88 | /* Close the first object again, we are done. */ | |
89 | if (dlclose (h1) != 0) | |
90 | { | |
91 | printf ("closing h1 failed: %s\n", dlerror ()); | |
92 | exit (1); | |
93 | } | |
94 | if (dlclose (h2) != 0) | |
95 | { | |
96 | printf ("closing h2 failed: %s\n", dlerror ()); | |
97 | exit (1); | |
98 | } | |
99 | ||
100 | return 0; | |
101 | } |