elf/tst-tls-dlinfo.c

   1 #include <dlfcn.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4
   5
   6 #define TEST_FUNCTION do_test ()
   7 static int
   8 do_test (void)
   9 {
  10   static const char modname[] = "tst-tlsmod2.so";
  11   int result = 0;
  12   int *foop;
  13   int (*fp) (int, int *);
  14   void *h;
  15
  16   h = dlopen (modname, RTLD_LAZY);
  17   if (h == NULL)
  18     {
  19       printf ("cannot open '%s': %s\n", modname, dlerror ());
  20       exit (1);
  21     }
  22
  23   fp = dlsym (h, "in_dso");
  24   if (fp == NULL)
  25     {
  26       printf ("cannot get symbol 'in_dso': %s\n", dlerror ());
  27       exit (1);
  28     }
  29
  30   size_t modid = -1;
  31   if (dlinfo (h, RTLD_DI_TLS_MODID, &modid))
  32     {
  33       printf ("dlinfo RTLD_DI_TLS_MODID failed: %s\n", dlerror ());
  34       result = 1;
  35     }
  36   else
  37     printf ("dlinfo says TLS module ID %Zu\n", modid);
  38
  39   void *block;
  40   if (dlinfo (h, RTLD_DI_TLS_DATA, &block))
  41     {
  42       printf ("dlinfo RTLD_DI_TLS_DATA failed: %s\n", dlerror ());
  43       result = 1;
  44     }
  45   else if (block != NULL)
  46     {
  47       printf ("dlinfo RTLD_DI_TLS_DATA says %p but should be unallocated\n",
  48               block);
  49       result = 1;
  50     }
  51
  52   result |= fp (0, NULL);
  53
  54   foop = dlsym (h, "foo");
  55   if (foop == NULL)
  56     {
  57       printf ("cannot get symbol 'foo' the second time: %s\n", dlerror ());
  58       exit (1);
  59     }
  60   if (*foop != 16)
  61     {
  62       puts ("foo != 16");
  63       result = 1;
  64     }
  65
  66   /* Now the module's TLS block has been used and should appear.  */
  67   if (dlinfo (h, RTLD_DI_TLS_DATA, &block))
  68     {
  69       printf ("dlinfo RTLD_DI_TLS_DATA failed the second time: %s\n",
  70               dlerror ());
  71       result = 1;
  72     }
  73   else if (block != foop)
  74     {
  75       printf ("dlinfo RTLD_DI_TLS_DATA says %p but should be %p\n",
  76               block, foop);
  77       result = 1;
  78     }
  79
  80   dlclose (h);
  81
  82   return result;
  83 }
  84
  85
  86 #include "../test-skeleton.c"