elf/noload.c

   1 #include <dlfcn.h>
   2 #include <stdio.h>
   3 #include <mcheck.h>
   4
   5 int
   6 main (void)
   7 {
   8   int result = 0;
   9   void *p;
  10
  11   mtrace ();
  12
  13   /* First try to load an object which is a dependency.  This should
  14      succeed.  */
  15   p = dlopen ("testobj1.so", RTLD_LAZY | RTLD_NOLOAD);
  16   if (p == NULL)
  17     {
  18       printf ("cannot open \"testobj1.so\": %s\n", dlerror ());
  19       result = 1;
  20     }
  21   else
  22     {
  23       puts ("loading \"testobj1.so\" succeeded, OK");
  24       dlclose (p);
  25     }
  26
  27   /* Now try loading an object which is not already loaded.  */
  28   if (dlopen ("testobj5.so", RTLD_LAZY | RTLD_NOLOAD) != NULL)
  29     {
  30       puts ("succeeded in loading \"testobj5.so\"");
  31       result = 1;
  32     }
  33   else
  34     {
  35       /* Load the object and run the same test again.  */
  36       puts ("\"testobj5.so\" wasn't loaded and RTLD_NOLOAD prevented it, OK");
  37
  38       p = dlopen ("testobj5.so", RTLD_LAZY);
  39
  40       if (p == NULL)
  41         {
  42           printf ("cannot open \"testobj5.so\" without RTLD_NOLOAD: %s\n",
  43                   dlerror ());
  44           result = 1;
  45         }
  46       else
  47         {
  48           puts ("loading \"testobj5.so\" succeeded, OK");
  49
  50           void *q = dlopen ("testobj5.so", RTLD_LAZY | RTLD_NOLOAD);
  51           if (q == NULL)
  52             {
  53               printf ("cannot open \"testobj5.so\": %s\n", dlerror ());
  54               result = 1;
  55             }
  56           else
  57             {
  58               puts ("loading \"testobj5.so\" with RTLD_NOLOAD succeeded, OK");
  59               dlclose (q);
  60             }
  61
  62           if (dlclose (p) != 0)
  63             {
  64               printf ("cannot close \"testobj5.so\": %s\n", dlerror ());
  65               result = 1;
  66             }
  67           else
  68             puts ("closing \"testobj5.so\" succeeded, OK");
  69         }
  70     }
  71
  72   return result;
  73 }
  74
  75
  76 extern int foo (int a);
  77 int
  78 foo (int a)
  79 {
  80   return 42 + a;
  81 }