dlfcn/tststatic4.c

   1 /* Global object symbol access tests with a static executable (BZ #15022).
   2    Copyright (C) 2013-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <dlfcn.h>
  20 #include <stddef.h>
  21 #include <stdio.h>
  22
  23 #define MAGIC0 0
  24 #define MAGIC1 0x5500ffaa
  25 #define MAGIC2 0xaaff0055
  26 #define MAGIC3 0xff55aa00
  27
  28 /* Check the ability to access the global symbol object and then
  29    global-scope symbol access consistency via different mappings
  30    requested from a static executable.  */
  31 static int
  32 do_test (void)
  33 {
  34   unsigned int (*initial_getfoo) (void);
  35   void (*initial_setfoo) (unsigned int);
  36   unsigned int (*global_getfoo) (void);
  37   void (*global_setfoo) (unsigned int);
  38   unsigned int (*local_getfoo) (void);
  39   void (*local_setfoo) (unsigned int);
  40   unsigned int *initial_foop;
  41   unsigned int *global_foop;
  42   unsigned int *local_foop;
  43   void *initial_handle;
  44   void *global_handle;
  45   void *local_handle;
  46   unsigned int foo;
  47
  48   /* Try to map self.  */
  49   initial_handle = dlopen (NULL, RTLD_LAZY | RTLD_GLOBAL);
  50   if (initial_handle == NULL)
  51     {
  52       printf ("dlopen [initial] (NULL): %s\n", dlerror ());
  53       return 1;
  54     }
  55
  56   /* Make sure symbol lookups fail gracefully.  */
  57   initial_foop = dlsym (initial_handle, "foo");
  58   if (initial_foop != NULL)
  59     {
  60       printf ("dlsym [initial] (foo): got %p, expected NULL\n", initial_foop);
  61       return 1;
  62     }
  63
  64   initial_getfoo = dlsym (initial_handle, "getfoo");
  65   if (initial_getfoo != NULL)
  66     {
  67       printf ("dlsym [initial] (getfoo): got %p, expected NULL\n",
  68               initial_getfoo);
  69       return 1;
  70     }
  71
  72   initial_setfoo = dlsym (initial_handle, "setfoo");
  73   if (initial_setfoo != NULL)
  74     {
  75       printf ("dlsym [initial] (setfoo): got %p, expected NULL\n",
  76               initial_setfoo);
  77       return 1;
  78     }
  79
  80   /* Try to map a module into the global scope.  */
  81   global_handle = dlopen ("modstatic3.so", RTLD_LAZY | RTLD_GLOBAL);
  82   if (global_handle == NULL)
  83     {
  84       printf ("dlopen [global] (modstatic3.so): %s\n", dlerror ());
  85       return 1;
  86     }
  87
  88   /* Get at its symbols.  */
  89   global_foop = dlsym (global_handle, "foo");
  90   if (global_foop == NULL)
  91     {
  92       printf ("dlsym [global] (foo): %s\n", dlerror ());
  93       return 1;
  94     }
  95
  96   global_getfoo = dlsym (global_handle, "getfoo");
  97   if (global_getfoo == NULL)
  98     {
  99       printf ("dlsym [global] (getfoo): %s\n", dlerror ());
 100       return 1;
 101     }
 102
 103   global_setfoo = dlsym (global_handle, "setfoo");
 104   if (global_setfoo == NULL)
 105     {
 106       printf ("dlsym [global] (setfoo): %s\n", dlerror ());
 107       return 1;
 108     }
 109
 110   /* Try to map self again now.  */
 111   local_handle = dlopen (NULL, RTLD_LAZY | RTLD_LOCAL);
 112   if (local_handle == NULL)
 113     {
 114       printf ("dlopen [local] (NULL): %s\n", dlerror ());
 115       return 1;
 116     }
 117
 118   /* Make sure we can get at the previously loaded module's symbols
 119      via this handle too.  */
 120   local_foop = dlsym (local_handle, "foo");
 121   if (local_foop == NULL)
 122     {
 123       printf ("dlsym [local] (foo): %s\n", dlerror ());
 124       return 1;
 125     }
 126
 127   local_getfoo = dlsym (local_handle, "getfoo");
 128   if (local_getfoo == NULL)
 129     {
 130       printf ("dlsym [local] (getfoo): %s\n", dlerror ());
 131       return 1;
 132     }
 133
 134   local_setfoo = dlsym (local_handle, "setfoo");
 135   if (local_setfoo == NULL)
 136     {
 137       printf ("dlsym [local] (setfoo): %s\n", dlerror ());
 138       return 1;
 139     }
 140
 141   /* Make sure we can get at the previously loaded module's symbols
 142      via a handle that was obtained before the module was loaded too.  */
 143   initial_foop = dlsym (initial_handle, "foo");
 144   if (initial_foop == NULL)
 145     {
 146       printf ("dlsym [initial] (foo): %s\n", dlerror ());
 147       return 1;
 148     }
 149
 150   initial_getfoo = dlsym (initial_handle, "getfoo");
 151   if (initial_getfoo == NULL)
 152     {
 153       printf ("dlsym [initial] (getfoo): %s\n", dlerror ());
 154       return 1;
 155     }
 156
 157   initial_setfoo = dlsym (initial_handle, "setfoo");
 158   if (initial_setfoo == NULL)
 159     {
 160       printf ("dlsym [initial] (setfoo): %s\n", dlerror ());
 161       return 1;
 162     }
 163
 164   /* Make sure the view of the initial state is consistent.  */
 165   foo = *initial_foop;
 166   if (foo != MAGIC0)
 167     {
 168       printf ("*foop [initial]: got %#x, expected %#x\n", foo, MAGIC0);
 169       return 1;
 170     }
 171
 172   foo = *global_foop;
 173   if (foo != MAGIC0)
 174     {
 175       printf ("*foop [global]: got %#x, expected %#x\n", foo, MAGIC0);
 176       return 1;
 177     }
 178
 179   foo = *local_foop;
 180   if (foo != MAGIC0)
 181     {
 182       printf ("*foop [local]: got %#x, expected %#x\n", foo, MAGIC0);
 183       return 1;
 184     }
 185
 186   foo = initial_getfoo ();
 187   if (foo != MAGIC0)
 188     {
 189       printf ("getfoo [initial]: got %#x, expected %#x\n", foo, MAGIC0);
 190       return 1;
 191     }
 192
 193   foo = global_getfoo ();
 194   if (foo != MAGIC0)
 195     {
 196       printf ("getfoo [global]: got %#x, expected %#x\n", foo, MAGIC0);
 197       return 1;
 198     }
 199
 200   foo = local_getfoo ();
 201   if (foo != MAGIC0)
 202     {
 203       printf ("getfoo [local]: got %#x, expected %#x\n", foo, MAGIC0);
 204       return 1;
 205     }
 206
 207   /* Likewise with a change to its state made through the first handle.  */
 208   initial_setfoo (MAGIC1);
 209
 210   foo = *initial_foop;
 211   if (foo != MAGIC1)
 212     {
 213       printf ("*foop [initial]: got %#x, expected %#x\n", foo, MAGIC1);
 214       return 1;
 215     }
 216
 217   foo = *global_foop;
 218   if (foo != MAGIC1)
 219     {
 220       printf ("*foop [global]: got %#x, expected %#x\n", foo, MAGIC1);
 221       return 1;
 222     }
 223
 224   foo = *local_foop;
 225   if (foo != MAGIC1)
 226     {
 227       printf ("*foop [local]: got %#x, expected %#x\n", foo, MAGIC1);
 228       return 1;
 229     }
 230
 231   foo = initial_getfoo ();
 232   if (foo != MAGIC1)
 233     {
 234       printf ("getfoo [initial]: got %#x, expected %#x\n", foo, MAGIC1);
 235       return 1;
 236     }
 237
 238   foo = global_getfoo ();
 239   if (foo != MAGIC1)
 240     {
 241       printf ("getfoo [global]: got %#x, expected %#x\n", foo, MAGIC1);
 242       return 1;
 243     }
 244
 245   foo = local_getfoo ();
 246   if (foo != MAGIC1)
 247     {
 248       printf ("getfoo [local]: got %#x, expected %#x\n", foo, MAGIC1);
 249       return 1;
 250     }
 251
 252   /* Likewise with a change to its state made through the second handle.  */
 253   global_setfoo (MAGIC2);
 254
 255   foo = *initial_foop;
 256   if (foo != MAGIC2)
 257     {
 258       printf ("*foop [initial]: got %#x, expected %#x\n", foo, MAGIC2);
 259       return 1;
 260     }
 261
 262   foo = *global_foop;
 263   if (foo != MAGIC2)
 264     {
 265       printf ("*foop [global]: got %#x, expected %#x\n", foo, MAGIC2);
 266       return 1;
 267     }
 268
 269   foo = *local_foop;
 270   if (foo != MAGIC2)
 271     {
 272       printf ("*foop [local]: got %#x, expected %#x\n", foo, MAGIC2);
 273       return 1;
 274     }
 275
 276   foo = initial_getfoo ();
 277   if (foo != MAGIC2)
 278     {
 279       printf ("getfoo [initial]: got %#x, expected %#x\n", foo, MAGIC2);
 280       return 1;
 281     }
 282
 283   foo = global_getfoo ();
 284   if (foo != MAGIC2)
 285     {
 286       printf ("getfoo [global]: got %#x, expected %#x\n", foo, MAGIC2);
 287       return 1;
 288     }
 289
 290   foo = local_getfoo ();
 291   if (foo != MAGIC2)
 292     {
 293       printf ("getfoo [local]: got %#x, expected %#x\n", foo, MAGIC2);
 294       return 1;
 295     }
 296
 297   /* Likewise with a change to its state made through the third handle.  */
 298   local_setfoo (MAGIC3);
 299
 300   foo = *initial_foop;
 301   if (foo != MAGIC3)
 302     {
 303       printf ("*foop [initial]: got %#x, expected %#x\n", foo, MAGIC3);
 304       return 1;
 305     }
 306
 307   foo = *global_foop;
 308   if (foo != MAGIC3)
 309     {
 310       printf ("*foop [global]: got %#x, expected %#x\n", foo, MAGIC3);
 311       return 1;
 312     }
 313
 314   foo = *local_foop;
 315   if (foo != MAGIC3)
 316     {
 317       printf ("*foop [local]: got %#x, expected %#x\n", foo, MAGIC3);
 318       return 1;
 319     }
 320
 321   foo = initial_getfoo ();
 322   if (foo != MAGIC3)
 323     {
 324       printf ("getfoo [initial]: got %#x, expected %#x\n", foo, MAGIC3);
 325       return 1;
 326     }
 327
 328   foo = global_getfoo ();
 329   if (foo != MAGIC3)
 330     {
 331       printf ("getfoo [global]: got %#x, expected %#x\n", foo, MAGIC3);
 332       return 1;
 333     }
 334
 335   foo = local_getfoo ();
 336   if (foo != MAGIC3)
 337     {
 338       printf ("getfoo [local]: got %#x, expected %#x\n", foo, MAGIC3);
 339       return 1;
 340     }
 341
 342   /* All done, clean up.  */
 343   initial_getfoo = NULL;
 344   initial_setfoo = NULL;
 345   initial_foop = NULL;
 346
 347   local_getfoo = NULL;
 348   local_setfoo = NULL;
 349   local_foop = NULL;
 350   dlclose (local_handle);
 351
 352   global_getfoo = NULL;
 353   global_setfoo = NULL;
 354   global_foop = NULL;
 355   dlclose (global_handle);
 356
 357   dlclose (initial_handle);
 358
 359   return 0;
 360 }
 361
 362 #define TEST_FUNCTION do_test ()
 363 #include "../test-skeleton.c"