elf/unload4.c

   1 #include <dlfcn.h>
   2 #include <stdio.h>
   3 #include <malloc.h>
   4
   5 int
   6 main (void)
   7 {
   8 #ifdef M_PERTURB
   9   mallopt (M_PERTURB, 0xaa);
  10 #endif
  11
  12   void *h;
  13   int (*fn) (int);
  14   h = dlopen ("unload4mod1.so", RTLD_LAZY);
  15   if (h == NULL)
  16     {
  17       puts ("1st dlopen failed");
  18       return 1;
  19     }
  20   fn = dlsym (h, "foo");
  21   if (fn == NULL)
  22     {
  23       puts ("dlsym failed");
  24       return 1;
  25     }
  26   int n = fn (10);
  27   if (n != 28)
  28     {
  29       printf ("foo (10) returned %d != 28\n", n);
  30       return 1;
  31     }
  32   dlclose (h);
  33   h = dlopen ("unload4mod3.so", RTLD_LAZY);
  34   fn = dlsym (h, "mod3fn2");
  35   if (fn == NULL)
  36     {
  37       puts ("second dlsym failed");
  38       return 1;
  39     }
  40   n = fn (10);
  41   if (n != 22)
  42     {
  43       printf ("mod3fn2 (10) returned %d != 22\n", n);
  44       return 1;
  45     }
  46   dlclose (h);
  47   return 0;
  48 }