elf/tst-tls7.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-tlsmod3.so";
  12   int result = 0;
  13   int (*fp) (void);
  14   void *h;
  15   int i;
  16   int modid = -1;
  17
  18   for (i = 0; i < 10; ++i)
  19     {
  20       h = dlopen (modname, RTLD_LAZY);
  21       if (h == NULL)
  22         {
  23           printf ("cannot open '%s': %s\n", modname, dlerror ());
  24           exit (1);
  25         }
  26
  27       /* Dirty test code here: we peek into a private data structure.
  28          We make sure that the module gets assigned the same ID every
  29          time.  The value of the first round is used.  */
  30       if (modid == -1)
  31         modid = ((struct link_map *) h)->l_tls_modid;
  32       else if (((struct link_map *) h)->l_tls_modid != (size_t) modid)
  33         {
  34           printf ("round %d: modid now %zu, initially %d\n",
  35                   i, ((struct link_map *) h)->l_tls_modid, modid);
  36           result = 1;
  37         }
  38
  39       fp = dlsym (h, "in_dso2");
  40       if (fp == NULL)
  41         {
  42           printf ("cannot get symbol 'in_dso2': %s\n", dlerror ());
  43           exit (1);
  44         }
  45
  46       result |= fp ();
  47
  48       dlclose (h);
  49     }
  50
  51   return result;
  52 }
  53
  54
  55 #include <support/test-driver.c>