elf/tst-preload-pthread-libc.c

   1 /* Test relocation ordering if the main executable is libc.so.6 (bug 20972).
   2    Copyright (C) 2020-2022 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 <gnu/lib-names.h>
  20 #include <stdio.h>
  21 #include <support/support.h>
  22 #include <unistd.h>
  23
  24 int
  25 main (void)
  26 {
  27   char *libc = xasprintf ("%s/%s", support_slibdir_prefix, LIBC_SO);
  28   char *argv[] = { libc, NULL };
  29   char *envp[] = { (char *) "LD_PRELOAD=" LIBPTHREAD_SO,
  30     /* Relocation ordering matters most without lazy binding.  */
  31     (char *) "LD_BIND_NOW=1",
  32     NULL };
  33   execve (libc, argv, envp);
  34   printf ("execve of %s failed: %m\n", libc);
  35   return 1;
  36 }