elf/tst-dlopen-pie.c

   1 /* dlopen test for PIE objects.
   2    Copyright (C) 2019-2022 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 /* This test attempts to open the (otherwise unrelated) PIE test
  20    program elf/tst-pie1 and expects the attempt to fail.  */
  21
  22 #include <dlfcn.h>
  23 #include <stddef.h>
  24 #include <string.h>
  25 #include <support/check.h>
  26 #include <support/support.h>
  27
  28 static void
  29 test_mode (int mode)
  30 {
  31   char *pie_path = xasprintf ("%s/elf/tst-pie1", support_objdir_root);
  32   if (dlopen (pie_path, mode) != NULL)
  33     FAIL_EXIT1 ("dlopen succeeded unexpectedly (%d)", mode);
  34   const char *message = dlerror ();
  35   const char *expected
  36     = "cannot dynamically load position-independent executable";
  37   if (strstr (message, expected) == NULL)
  38     FAIL_EXIT1 ("unexpected error message (mode %d): %s", mode, message);
  39 }
  40
  41 static int
  42 do_test (void)
  43 {
  44   test_mode (RTLD_LAZY);
  45   test_mode (RTLD_NOW);
  46   return 0;
  47 }
  48
  49 #include <support/test-driver.c>