elf/neededtest4.c

   1 #include <dlfcn.h>
   2 #include <libintl.h>
   3 #include <link.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7
   8 static int
   9 check_loaded_objects (const char **loaded)
  10 {
  11   struct link_map *lm;
  12   int n;
  13   int *found = NULL;
  14   int errors = 0;
  15
  16   for (n = 0; loaded[n]; n++)
  17     /* NOTHING */;
  18
  19   if (n)
  20     {
  21       found = (int *) alloca (sizeof (int) * n);
  22       memset (found, 0, sizeof (int) * n);
  23     }
  24
  25   printf("   Name\n");
  26   printf(" --------------------------------------------------------\n");
  27   for (lm = _r_debug.r_map; lm; lm = lm->l_next)
  28     {
  29       if (lm->l_name && lm->l_name[0])
  30         printf(" %s, count = %d\n", lm->l_name, (int) lm->l_direct_opencount);
  31       if (lm->l_type == lt_loaded && lm->l_name)
  32         {
  33           int match = 0;
  34           for (n = 0; loaded[n] != NULL; n++)
  35             {
  36               if (strcmp (basename (loaded[n]), basename (lm->l_name)) == 0)
  37                 {
  38                   found[n] = 1;
  39                   match = 1;
  40                   break;
  41                 }
  42             }
  43
  44           if (match == 0)
  45             {
  46               ++errors;
  47               printf ("ERRORS: %s is not unloaded\n", lm->l_name);
  48             }
  49         }
  50     }
  51
  52   for (n = 0; loaded[n] != NULL; n++)
  53     {
  54       if (found[n] == 0)
  55         {
  56           ++errors;
  57           printf ("ERRORS: %s is not loaded\n", loaded[n]);
  58         }
  59     }
  60
  61   return errors;
  62 }
  63
  64 extern void c_function (void);
  65 extern char *dirname (__const char *__filename);
  66
  67 int
  68 main (int argc, char **argv)
  69 {
  70   void *obj;
  71   const char *loaded[] = { NULL, NULL, NULL};
  72   int errors = 0;
  73   void (*f) (void);
  74   const char *dir = dirname (argv [0]);
  75   char *oldfilename;
  76   char *newfilename;
  77
  78   c_function ();
  79
  80   printf ("\nThis is what is in memory now:\n");
  81   errors += check_loaded_objects (loaded);
  82
  83   printf( "Loading shared object neededobj6.so\n");
  84   obj = dlopen( "neededobj6.so", RTLD_LAZY);
  85   if (obj == NULL)
  86     {
  87       printf ("%s\n", dlerror ());
  88       exit (1);
  89     }
  90   f = dlsym (obj, "a2_function");
  91   if (f == NULL)
  92     {
  93       printf ("%s\n", dlerror ());
  94       exit (1);
  95     }
  96   f ();
  97   loaded[0] = "neededobj5.so";
  98   loaded[1] = "neededobj6.so";
  99   errors += check_loaded_objects (loaded);
 100
 101   printf ("Closing neededobj6.so\n");
 102   dlclose (obj);
 103   loaded[0] = NULL;
 104   errors += check_loaded_objects (loaded);
 105
 106   printf ("Rename neededobj5.so\n");
 107   oldfilename = alloca (strlen (dir) + 1 + sizeof ("neededobj5.so"));
 108   strcpy (oldfilename, dir);
 109   strcat (oldfilename, "/");
 110   strcat (oldfilename, "neededobj5.so");
 111   newfilename = alloca (strlen (oldfilename) + sizeof (".renamed"));
 112   strcpy (newfilename, oldfilename);
 113   strcat (newfilename, ".renamed");
 114   if (rename (oldfilename, newfilename))
 115     {
 116       perror ("rename");
 117       exit (1);
 118     }
 119
 120   printf( "Loading shared object neededobj6.so\n");
 121   obj = dlopen( "neededobj6.so", RTLD_LAZY);
 122   if (obj == NULL)
 123     printf ("%s\n", dlerror ());
 124   else
 125     {
 126       printf ("neededobj6.so should fail to load\n");
 127       exit (1);
 128     }
 129
 130   printf( "Loading shared object neededobj1.so\n");
 131   obj = dlopen( "neededobj1.so", RTLD_LAZY);
 132   if (obj == NULL)
 133     {
 134       printf ("%s\n", dlerror ());
 135       exit (1);
 136     }
 137   errors += check_loaded_objects (loaded);
 138   f = dlsym (obj, "c_function");
 139   if (f == NULL)
 140     {
 141       printf ("%s\n", dlerror ());
 142       exit (1);
 143     }
 144   f ();
 145
 146   printf ("Restore neededobj5.so\n");
 147   if (rename (newfilename, oldfilename))
 148     {
 149       perror ("rename");
 150       exit (1);
 151     }
 152
 153   if (errors != 0)
 154     printf ("%d errors found\n", errors);
 155   return errors;
 156 }