elf/tst-tls6.c

   1 #include <dlfcn.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4
   5 #include <link.h>
   6
   7
   8 static int
   9 do_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 (modname, RTLD_LAZY);
  23       if (h == NULL)
  24         {
  25           printf ("cannot open '%s': %s\n", modname, dlerror ());
  26           exit (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 ("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 (h, "foo");
  42       if (foop == NULL)
  43         {
  44           printf ("cannot get symbol 'foo': %s\n", dlerror ());
  45           exit (1);
  46         }
  47
  48       *foop = 42 + i;
  49
  50       fp = dlsym (h, "in_dso");
  51       if (fp == NULL)
  52         {
  53           printf ("cannot get symbol 'in_dso': %s\n", dlerror ());
  54           exit (1);
  55         }
  56
  57       result |= fp (42 + i, foop);
  58
  59       foop2 = dlsym (h, "foo");
  60       if (foop2 == NULL)
  61         {
  62           printf ("cannot get symbol 'foo' the second time: %s\n", dlerror ());
  63           exit (1);
  64         }
  65
  66       if (foop != foop2)
  67         {
  68           puts ("address of 'foo' different the second time");
  69           result = 1;
  70         }
  71       else if (*foop != 16)
  72         {
  73           puts ("foo != 16");
  74           result = 1;
  75         }
  76
  77       dlclose (h);
  78     }
  79
  80   return result;
  81 }
  82
  83
  84 #include <support/test-driver.c>