mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/* Copyright (C) 2003-2015 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
|
|
<http://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;
|
|
struct sigaction sa;
|
|
|
|
sa.sa_handler = sig_handler;
|
|
sigemptyset (&sa.sa_mask);
|
|
sa.sa_flags = SA_SIGINFO;
|
|
|
|
if (sigaction (SIGSEGV, &sa, 0))
|
|
{
|
|
perror ("installing SIGSEGV handler\n");
|
|
exit (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"
|