elf/tst-dlopen-self.c

   1 /* Check that dlopen'ing the executable itself fails (bug 24900).
   2    Copyright (C) 2014-2021 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 <stdlib.h>
  21 #include <string.h>
  22 #include <support/check.h>
  23
  24 /* Call dlopen and check that fails with an error message indicating
  25    an attempt to open an ET_EXEC or PIE object.  */
  26 static void
  27 check_dlopen_failure (const char *path)
  28 {
  29   void *handle = dlopen (path, RTLD_LAZY);
  30   if (handle != NULL)
  31     FAIL_EXIT1 ("dlopen succeeded unexpectedly: %s", path);
  32
  33   const char *message = dlerror ();
  34   TEST_VERIFY_EXIT (message != NULL);
  35   if ((strstr (message,
  36                "cannot dynamically load position-independent executable")
  37        == NULL)
  38       && strstr (message, "cannot dynamically load executable") == NULL)
  39     FAIL_EXIT1 ("invalid dlopen error message: \"%s\"", message);
  40 }
  41
  42 static int
  43 do_test (int argc, char *argv[])
  44 {
  45   check_dlopen_failure (argv[0]);
  46
  47   char *full_path = realpath (argv[0], NULL);
  48   check_dlopen_failure  (full_path);
  49   free (full_path);
  50
  51   return 0;
  52 }
  53
  54 #define TEST_FUNCTION_ARGV do_test
  55 #include <support/test-driver.c>