elf/unload3.c

   1 #include <dlfcn.h>
   2 #include <stdio.h>
   3
   4 int
   5 main (void)
   6 {
   7   void *g = dlopen ("unload3mod1.so", RTLD_GLOBAL | RTLD_NOW);
   8   void *h = dlopen ("unload3mod2.so", RTLD_GLOBAL | RTLD_NOW);
   9   if (g == NULL || h == NULL)
  10     {
  11       printf ("dlopen unload3mod{1,2}.so failed: %p %p\n", g, h);
  12       return 1;
  13     }
  14   dlclose (h);
  15   dlclose (g);
  16
  17   g = dlopen ("unload3mod3.so", RTLD_GLOBAL | RTLD_NOW);
  18   h = dlopen ("unload3mod4.so", RTLD_GLOBAL | RTLD_NOW);
  19   if (g == NULL || h == NULL)
  20     {
  21       printf ("dlopen unload3mod{3,4}.so failed: %p %p\n", g, h);
  22       return 1;
  23     }
  24
  25   int (*fn) (int);
  26   fn = dlsym (h, "bar");
  27   if (fn == NULL)
  28     {
  29       puts ("dlsym failed");
  30       return 1;
  31     }
  32
  33   int val = fn (16);
  34   if (val != 24)
  35     {
  36       printf ("bar returned %d != 24\n", val);
  37       return 1;
  38     }
  39
  40   return 0;
  41 }