1 /* Copyright (C) 1991,1994-1996,1998,2001,2002,2005,2009,2011
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
31 extern const char *__progname;
34 #include <libio/iolibio.h>
35 #define fflush(s) INTUSE(_IO_fflush) (s)
37 /* This function, when passed a string containing an asserted
38 expression, a filename, and a line number, prints a message
39 on the standard error stream of the form:
40 a.c:10: foobar: Assertion `a == b' failed.
41 It then aborts program execution via a call to `abort'. */
43 #ifdef FATAL_PREPARE_INCLUDE
44 # include FATAL_PREPARE_INCLUDE
49 __assert_fail_base (const char *fmt, const char *assertion, const char *file,
50 unsigned int line, const char *function)
59 if (__asprintf (&str, fmt,
60 __progname, __progname[0] ? ": " : "",
62 function ? function : "", function ? ": " : "",
63 assertion, &total) >= 0)
65 /* Print the message. */
66 (void) __fxprintf (NULL, "%s", str);
67 (void) fflush (stderr);
69 total = (total + 1 + GLRO(dl_pagesize) - 1) & ~(GLRO(dl_pagesize) - 1);
70 struct abort_msg_s *buf = __mmap (NULL, total, PROT_READ | PROT_WRITE,
71 MAP_ANON | MAP_PRIVATE, -1, 0);
72 if (__builtin_expect (buf != MAP_FAILED, 1))
75 strcpy (buf->msg, str);
77 /* We have to free the old buffer since the application might
78 catch the SIGABRT signal. */
79 struct abort_msg_s *old = atomic_exchange_acq (&__abort_msg, buf);
82 __munmap (old, old->size);
89 /* At least print a minimal message. */
90 static const char errstr[] = "Unexpected error.\n";
91 __libc_write (STDERR_FILENO, errstr, sizeof (errstr) - 1);
100 __assert_fail (const char *assertion, const char *file, unsigned int line,
101 const char *function)
103 __assert_fail_base (_("%s%s%s:%u: %s%sAssertion `%s' failed.\n%n"),
104 assertion, file, line, function);
106 hidden_def(__assert_fail)