elf/tst-dlmopen1mod.c

   1 #include <dlfcn.h>
   2 #include <stdio.h>
   3 #include <gnu/lib-names.h>
   4
   5
   6 static int cnt;
   7
   8 static void
   9 __attribute ((constructor))
  10 constr (void)
  11 {
  12   ++cnt;
  13 }
  14
  15
  16 int
  17 foo (Lmid_t ns2)
  18 {
  19   void *h = dlopen (LIBC_SO, RTLD_LAZY|RTLD_NOLOAD);
  20   if (h == NULL)
  21     {
  22       printf ("cannot get handle for %s: %s\n", LIBC_SO, dlerror ());
  23       return 1;
  24     }
  25
  26   Lmid_t ns = -10;
  27   if (dlinfo (h, RTLD_DI_LMID, &ns) != 0)
  28     {
  29       printf ("dlinfo for %s in %s failed: %s\n",
  30               LIBC_SO, __func__, dlerror ());
  31       return 1;
  32     }
  33
  34   if (ns != ns2)
  35     {
  36       printf ("namespace for %s not LM_ID_BASE\n", LIBC_SO);
  37       return 1;
  38     }
  39
  40   if (dlclose (h) != 0)
  41     {
  42       printf ("dlclose for %s in %s failed: %s\n",
  43               LIBC_SO, __func__, dlerror ());
  44       return 1;
  45     }
  46
  47   if (cnt == 0)
  48     {
  49       puts ("constructor did not run");
  50       return 1;
  51     }
  52   else if (cnt != 1)
  53     {
  54       puts ("constructor did not run exactly once");
  55       return 1;
  56     }
  57
  58   return 0;
  59 }