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Diffstat (limited to 'sysdeps/pthread/tst-cleanup2.c')
-rw-r--r-- | sysdeps/pthread/tst-cleanup2.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/sysdeps/pthread/tst-cleanup2.c b/sysdeps/pthread/tst-cleanup2.c new file mode 100644 index 0000000..5936c24 --- /dev/null +++ b/sysdeps/pthread/tst-cleanup2.c @@ -0,0 +1,63 @@ +/* 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" |