elf/tst-tls6.c

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