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64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/* Copyright (C) 2003-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Bao Duong <bduong@progress.com>, 2003.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <setjmp.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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static sigjmp_buf jmpbuf;
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static void
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sig_handler (int signo)
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{
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siglongjmp (jmpbuf, 1);
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}
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static int
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do_test (void)
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{
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char *p = NULL;
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/* gcc can overwrite the success written value by scheduling instructions
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around sprintf. It is allowed to do this since according to C99 the first
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argument of sprintf is a character array and NULL is not a valid character
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array. Mark the return value as volatile so that it gets reloaded on
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return. */
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volatile int ret = 0;
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if (signal (SIGSEGV, &sig_handler) == SIG_ERR)
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{
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perror ("installing SIGSEGV handler");
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return 1;
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}
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puts ("Attempting to sprintf to null ptr");
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if (setjmp (jmpbuf))
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{
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puts ("Exiting main...");
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return ret;
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}
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sprintf (p, "This should segv\n");
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return 1;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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