debug/fortify_fail.c

   1 /* Copyright (C) 2007-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <stdbool.h>
  21
  22
  23 extern char **__libc_argv attribute_hidden;
  24
  25 void
  26 __attribute__ ((noreturn))
  27 __fortify_fail_abort (_Bool need_backtrace, const char *msg)
  28 {
  29   /* The loop is added only to keep gcc happy.  Don't pass down
  30      __libc_argv[0] if we aren't doing backtrace since __libc_argv[0]
  31      may point to the corrupted stack.  */
  32   while (1)
  33     __libc_message (need_backtrace ? (do_abort | do_backtrace) : do_abort,
  34                     "*** %s ***: %s terminated\n",
  35                     msg,
  36                     (need_backtrace && __libc_argv[0] != NULL
  37                      ? __libc_argv[0] : "<unknown>"));
  38 }
  39
  40 void
  41 __attribute__ ((noreturn))
  42 __fortify_fail (const char *msg)
  43 {
  44   __fortify_fail_abort (true, msg);
  45 }
  46
  47 libc_hidden_def (__fortify_fail)
  48 libc_hidden_def (__fortify_fail_abort)