1 files changed, 33 insertions, 0 deletions
diff --git a/assert/__libc_assert_fail.c b/assert/__libc_assert_fail.c
new file mode 100644
index 0000000000..149d5feae1
--- /dev/null
+++ b/assert/__libc_assert_fail.c
@@ -0,0 +1,33 @@
+/* libc-internal assert that calls __libc_message.
+   Copyright (C) 2022 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <_itoa.h>
+#include <array_length.h>
+#include <intprops.h>
+#include <stdio.h>
+
+void
+__libc_assert_fail (const char *assertion, const char *file, unsigned int line,
+                    const char *function)
+{
+  char linebuf[INT_BUFSIZE_BOUND (unsigned int)];
+  array_end (linebuf)[-1] = '\0';
+  char *linestr = _itoa_word (line, array_end (linebuf) - 1, 10, 0);
+  __libc_message ("Fatal glibc error: %s:%s (%s): assertion failed: %s\n",
+                  file, linestr, function, assertion);
+}