elf/tst-tls-dlinfo.c

   1 #include <dlfcn.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4
   5 #include <tls.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 (*fp) (int, int *);
  16   void *h;
  17
  18   h = dlopen (modname, RTLD_LAZY);
  19   if (h == NULL)
  20     {
  21       printf ("cannot open '%s': %s\n", modname, dlerror ());
  22       exit (1);
  23     }
  24
  25   fp = dlsym (h, "in_dso");
  26   if (fp == NULL)
  27     {
  28       printf ("cannot get symbol 'in_dso': %s\n", dlerror ());
  29       exit (1);
  30     }
  31
  32   size_t modid = -1;
  33   if (dlinfo (h, RTLD_DI_TLS_MODID, &modid))
  34     {
  35       printf ("dlinfo RTLD_DI_TLS_MODID failed: %s\n", dlerror ());
  36       result = 1;
  37     }
  38   else
  39     printf ("dlinfo says TLS module ID %Zu\n", modid);
  40
  41   void *block;
  42   if (dlinfo (h, RTLD_DI_TLS_DATA, &block))
  43     {
  44       printf ("dlinfo RTLD_DI_TLS_DATA failed: %s\n", dlerror ());
  45       result = 1;
  46     }
  47   else if (block != NULL)
  48     {
  49       printf ("dlinfo RTLD_DI_TLS_DATA says %p but should be unallocated\n",
  50               block);
  51       result = 1;
  52     }
  53
  54   result |= fp (0, NULL);
  55
  56   foop = dlsym (h, "foo");
  57   if (foop == NULL)
  58     {
  59       printf ("cannot get symbol 'foo' the second time: %s\n", dlerror ());
  60       exit (1);
  61     }
  62   if (*foop != 16)
  63     {
  64       puts ("foo != 16");
  65       result = 1;
  66     }
  67
  68   /* Now the module's TLS block has been used and should appear.  */
  69   if (dlinfo (h, RTLD_DI_TLS_DATA, &block))
  70     {
  71       printf ("dlinfo RTLD_DI_TLS_DATA failed the second time: %s\n",
  72               dlerror ());
  73       result = 1;
  74     }
  75   else if (block != foop)
  76     {
  77       printf ("dlinfo RTLD_DI_TLS_DATA says %p but should be %p\n",
  78               block, foop);
  79       result = 1;
  80     }
  81
  82   dlclose (h);
  83
  84   return result;
  85 }
  86
  87
  88 #include "../test-skeleton.c"