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/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Bao Duong <bduong@progress.com>, 2003.
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 <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
static sigjmp_buf jmpbuf;
static void
sig_handler (int signo)
{
siglongjmp (jmpbuf, 1);
}
static int
do_test (void)
{
char *p = NULL;
/* gcc can overwrite the success written value by scheduling instructions
around sprintf. It is allowed to do this since according to C99 the first
argument of sprintf is a character array and NULL is not a valid character
array. Mark the return value as volatile so that it gets reloaded on
return. */
volatile int ret = 0;
if (signal (SIGSEGV, &sig_handler) == SIG_ERR)
{
perror ("installing SIGSEGV handler");
return 1;
}
puts ("Attempting to sprintf to null ptr");
if (setjmp (jmpbuf))
{
puts ("Exiting main...");
return ret;
}
sprintf (p, "This should segv\n");
return 1;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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