elf/lateglobal.c

   1 #include <dlfcn.h>
   2 #include <mcheck.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5
   6 int
   7 main (void)
   8 {
   9   void *h[2];
  10   int fail;
  11   int (*fp) (void);
  12
  13   mtrace ();
  14
  15   h[0] = dlopen ("ltglobmod1.so", RTLD_LAZY);
  16   if (h[0] == NULL)
  17     {
  18       printf ("%s: cannot open %s: %s\n",
  19               __FUNCTION__, "ltglobmod1.so", dlerror ());
  20       exit (EXIT_FAILURE);
  21     }
  22   h[1] = dlopen ("ltglobmod2.so", RTLD_LAZY);
  23   if (h[1] == NULL)
  24     {
  25       printf ("%s: cannot open %s: %s\n",
  26               __FUNCTION__, "ltglobmod2.so", dlerror ());
  27       exit (EXIT_FAILURE);
  28     }
  29
  30   puts ("loaded \"ltglobmod1.so\" without RTLD_GLOBAL");
  31
  32   fp = dlsym (h[1], "foo");
  33   if (fp == NULL)
  34     {
  35       printf ("cannot get address of `foo': %s\n", dlerror ());
  36       exit (EXIT_FAILURE);
  37     }
  38
  39   fail = fp ();
  40
  41   puts ("back in main");
  42
  43   dlclose (h[1]);
  44   dlclose (h[0]);
  45
  46   return fail;
  47 }