elf/tst-tls6.c

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