1#include <dlfcn.h>
2#include <stdio.h>
3#include <stdlib.h>
4
5#include <link.h>
6
7
8static int
9do_test (void)
10{
11 static const char modname[] = "tst-tlsmod2.so";
12 int result = 0;
13 int *foop;
14 int *foop2;
15 int (*fp) (int, int *);
16 void *h;
17 int i;
18 int modid = -1;
19
20 for (i = 0; i < 10; ++i)
21 {
22 h = dlopen (file: modname, RTLD_LAZY);
23 if (h == NULL)
24 {
25 printf (format: "cannot open '%s': %s\n", modname, dlerror ());
26 exit (status: 1);
27 }
28
29 /* Dirty test code here: we peek into a private data structure.
30 We make sure that the module gets assigned the same ID every
31 time. The value of the first round is used. */
32 if (modid == -1)
33 modid = ((struct link_map *) h)->l_tls_modid;
34 else if (((struct link_map *) h)->l_tls_modid != modid)
35 {
36 printf (format: "round %d: modid now %zd, initially %d\n",
37 i, ((struct link_map *) h)->l_tls_modid, modid);
38 result = 1;
39 }
40
41 foop = dlsym (handle: h, name: "foo");
42 if (foop == NULL)
43 {
44 printf (format: "cannot get symbol 'foo': %s\n", dlerror ());
45 exit (status: 1);
46 }
47
48 *foop = 42 + i;
49
50 fp = dlsym (handle: h, name: "in_dso");
51 if (fp == NULL)
52 {
53 printf (format: "cannot get symbol 'in_dso': %s\n", dlerror ());
54 exit (status: 1);
55 }
56
57 result |= fp (42 + i, foop);
58
59 foop2 = dlsym (handle: h, name: "foo");
60 if (foop2 == NULL)
61 {
62 printf (format: "cannot get symbol 'foo' the second time: %s\n", dlerror ());
63 exit (status: 1);
64 }
65
66 if (foop != foop2)
67 {
68 puts (s: "address of 'foo' different the second time");
69 result = 1;
70 }
71 else if (*foop != 16)
72 {
73 puts (s: "foo != 16");
74 result = 1;
75 }
76
77 dlclose (handle: h);
78 }
79
80 return result;
81}
82
83
84#include <support/test-driver.c>
85

source code of glibc/elf/tst-tls6.c