assert/__libc_assert_fail.c

   1 /* libc-internal assert that calls __libc_message.
   2    Copyright (C) 2022-2024 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 <_itoa.h>
  20 #include <array_length.h>
  21 #include <intprops.h>
  22 #include <stdio.h>
  23
  24 void
  25 __libc_assert_fail (const char *assertion, const char *file, unsigned int line,
  26                     const char *function)
  27 {
  28   char linebuf[INT_BUFSIZE_BOUND (unsigned int)];
  29   array_end (linebuf)[-1] = '\0';
  30   char *linestr = _itoa_word (line, array_end (linebuf) - 1, 10, 0);
  31   __libc_message ("Fatal glibc error: %s:%s (%s): assertion failed: %s\n",
  32                   file, linestr, function, assertion);
  33 }