elf/loadtest.c

   1 #include <assert.h>
   2 #include <dlfcn.h>
   3 #include <errno.h>
   4 #include <error.h>
   5 #include <mcheck.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9
  10
  11 /* How many load/unload operations do we do.  */
  12 #define TEST_ROUNDS     1000
  13
  14
  15 static struct
  16 {
  17   /* Name of the module.  */
  18   const char *name;
  19   /* The handle.  */
  20   void *handle;
  21 } testobjs[] =
  22 {
  23   { "testobj1.so", NULL },
  24   { "testobj2.so", NULL },
  25   { "testobj3.so", NULL },
  26   { "testobj4.so", NULL },
  27   { "testobj5.so", NULL },
  28   { "testobj6.so", NULL },
  29 };
  30 #define NOBJS   (sizeof (testobjs) / sizeof (testobjs[0]))
  31
  32
  33 static const struct
  34 {
  35   /* Name of a function to call.  */
  36   const char *fname;
  37   /* Index in status and handle array.  */
  38   int index;
  39   /* Options while loading the module.  */
  40   int options;
  41 } tests[] =
  42 {
  43   { "obj1func2", 0, RTLD_LAZY },
  44   { "obj1func1", 0, RTLD_LAZY | RTLD_GLOBAL },
  45   { "obj1func1", 0, RTLD_NOW, },
  46   { "obj1func2", 0, RTLD_NOW | RTLD_GLOBAL },
  47   { "obj2func2", 1, RTLD_LAZY },
  48   { "obj2func1", 1, RTLD_LAZY | RTLD_GLOBAL, },
  49   { "obj2func1", 1, RTLD_NOW, },
  50   { "obj2func2", 1, RTLD_NOW | RTLD_GLOBAL },
  51   { "obj3func2", 2, RTLD_LAZY },
  52   { "obj3func1", 2, RTLD_LAZY | RTLD_GLOBAL },
  53   { "obj3func1", 2, RTLD_NOW },
  54   { "obj3func2", 2, RTLD_NOW | RTLD_GLOBAL },
  55   { "obj4func2", 3, RTLD_LAZY },
  56   { "obj4func1", 3, RTLD_LAZY | RTLD_GLOBAL },
  57   { "obj4func1", 3, RTLD_NOW },
  58   { "obj4func2", 3, RTLD_NOW | RTLD_GLOBAL },
  59   { "obj5func2", 4, RTLD_LAZY },
  60   { "obj5func1", 4, RTLD_LAZY | RTLD_GLOBAL },
  61   { "obj5func1", 4, RTLD_NOW },
  62   { "obj5func2", 4, RTLD_NOW | RTLD_GLOBAL },
  63   { "obj6func2", 5, RTLD_LAZY },
  64   { "obj6func1", 5, RTLD_LAZY | RTLD_GLOBAL },
  65   { "obj6func1", 5, RTLD_NOW },
  66   { "obj6func2", 5, RTLD_NOW | RTLD_GLOBAL },
  67 };
  68 #define NTESTS  (sizeof (tests) / sizeof (tests[0]))
  69
  70
  71 #include <include/link.h>
  72
  73 #define MAPS ((struct link_map *) _r_debug.r_map)
  74
  75 #define OUT \
  76   for (map = MAPS; map != NULL; map = map->l_next)                    \
  77     if (map->l_type == lt_loaded)                                             \
  78       printf ("name = \"%s\", direct_opencount = %d\n",                       \
  79               map->l_name, (int) map->l_direct_opencount);                    \
  80   fflush (stdout)
  81
  82
  83 int
  84 main (int argc, char *argv[])
  85 {
  86   int debug = argc > 1 && argv[1][0] != '\0';
  87   int count = TEST_ROUNDS;
  88   int result = 0;
  89   struct link_map *map;
  90
  91   mtrace ();
  92
  93   /* Just a seed.  */
  94   srandom (TEST_ROUNDS);
  95
  96   if (debug)
  97     {
  98       puts ("in the beginning");
  99       OUT;
 100     }
 101
 102   while (count--)
 103     {
 104       int nr = random () % NTESTS;
 105       int index = tests[nr].index;
 106
 107       printf ("%4d: %4d: ", count + 1, nr);
 108       fflush (stdout);
 109
 110       if (testobjs[index].handle == NULL)
 111         {
 112           int (*fct) (int);
 113
 114           /* Load the object.  */
 115           testobjs[index].handle = dlopen (testobjs[index].name,
 116                                            tests[nr].options);
 117           if (testobjs[index].handle == NULL)
 118             error (EXIT_FAILURE, 0, "cannot load `%s': %s",
 119                    testobjs[index].name, dlerror ());
 120
 121           /* Test the function call.  */
 122           fct = dlsym (testobjs[index].handle, tests[nr].fname);
 123           if (fct == NULL)
 124             error (EXIT_FAILURE, 0,
 125                    "cannot get function `%s' from shared object `%s': %s",
 126                    tests[nr].fname, testobjs[index].name, dlerror ());
 127
 128           fct (10);
 129
 130           printf ("successfully loaded `%s', handle %p\n",
 131                   testobjs[index].name, testobjs[index].handle);
 132         }
 133       else
 134         {
 135           if (dlclose (testobjs[index].handle) != 0)
 136             {
 137               printf ("failed to close %s\n", testobjs[index].name);
 138               result = 1;
 139             }
 140           else
 141             printf ("successfully unloaded `%s', handle %p\n",
 142                     testobjs[index].name, testobjs[index].handle);
 143
 144           testobjs[index].handle = NULL;
 145
 146           if (testobjs[0].handle == NULL
 147               && testobjs[1].handle == NULL
 148               && testobjs[5].handle == NULL)
 149             {
 150               /* In this case none of the objects above should be
 151                  present.  */
 152               for (map = MAPS; map != NULL; map = map->l_next)
 153                 if (map->l_type == lt_loaded
 154                     && (strstr (map->l_name, testobjs[0].name) != NULL
 155                         || strstr (map->l_name, testobjs[1].name) != NULL
 156                         || strstr (map->l_name, testobjs[5].name) != NULL))
 157                   {
 158                     printf ("`%s' is still loaded\n", map->l_name);
 159                     result = 1;
 160                   }
 161             }
 162         }
 163
 164       if (debug)
 165         OUT;
 166     }
 167
 168   /* Unload all loaded modules.  */
 169   for (count = 0; count < (int) NOBJS; ++count)
 170     if (testobjs[count].handle != NULL)
 171       {
 172         printf ("\nclose: %s: l_initfini = %p, l_versions = %p\n",
 173                 testobjs[count].name,
 174                 ((struct link_map *) testobjs[count].handle)->l_initfini,
 175                 ((struct link_map *) testobjs[count].handle)->l_versions);
 176
 177         if (dlclose (testobjs[count].handle) != 0)
 178           {
 179             printf ("failed to close %s\n", testobjs[count].name);
 180             result = 1;
 181           }
 182       }
 183
 184   /* Check whether all files are unloaded.  */
 185   for (map = MAPS; map != NULL; map = map->l_next)
 186     if (map->l_type == lt_loaded)
 187       {
 188         printf ("name = \"%s\", direct_opencount = %d\n",
 189                 map->l_name, (int) map->l_direct_opencount);
 190         result = 1;
 191       }
 192
 193   return result;
 194 }
 195
 196
 197 extern int foo (int a);
 198 int
 199 foo (int a)
 200 {
 201   return a - 1;
 202 }