strace/tests/rt_sigpending.c
Dmitry V. Levin 11656206ff Fix corner cases of rt_sigpending syscall decoder
* signal (print_sigset_addr_len_limit): New function, cloned from
print_sigset_addr_len with added minimal length argument.
Treat length less than minimal length or greater than NSIG/8 as invalid.
Do not align length to 4-byte boundary.  Align destination buffer
to 4-byte boundary and initialize it with zeroes so that subsequent
call to sprintsigmask_n will not access uninitialized data.
(print_sigset_addr_len): Turn into a wrapper around
print_sigset_addr_len_limit with current_wordsize
as a minimal length argument.
(SYS_FUNC(rt_sigpending)): Call print_sigset_addr_len_limit
instead of print_sigset_addr_len with 1 as a minimal length argument.
* tests/rt_sigpending.c: New file.
* tests/rt_sigpending.test: New test.
* tests/.gitignore: Add rt_sigpending.
* tests/Makefile.am (check_PROGRAMS): Likewise.
(TESTS): Add rt_sigpending.test.
2016-02-19 01:44:33 +00:00

126 lines
3.6 KiB
C

/*
* This file is part of rt_sigpending strace test.
*
* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "tests.h"
#include <sys/syscall.h>
#ifdef __NR_rt_sigpending
# include <assert.h>
# include <signal.h>
# include <stdio.h>
# include <string.h>
# include <unistd.h>
static long
k_sigpending(void *const set, const unsigned long size)
{
return syscall(__NR_rt_sigpending, set, size);
}
static void
iterate(const char *const text, unsigned int size, void *set)
{
for (;;) {
if (k_sigpending(set, size))
perror_msg_and_fail("rt_sigpending");
if (size) {
#if WORDS_BIGENDIAN
if (size < sizeof(long))
tprintf("rt_sigpending(%s, %u) = 0\n",
"[]", size);
else
#endif
tprintf("rt_sigpending(%s, %u) = 0\n",
text, size);
} else {
tprintf("rt_sigpending(%p, %u) = 0\n", set, size);
break;
}
size >>= 1;
set += size;
}
}
int
main(void)
{
tprintf("%s", "");
const unsigned int big_size = 1024 / 8;
void *k_set = tail_alloc(big_size);
sigset_t *const libc_set = tail_alloc(sizeof(sigset_t));
sigemptyset(libc_set);
if (sigprocmask(SIG_SETMASK, libc_set, NULL))
perror_msg_and_fail("sigprocmask");
memset(k_set, 0, big_size);
unsigned int set_size = big_size;
for (; set_size; set_size >>= 1, k_set += set_size) {
if (!k_sigpending(k_set, set_size))
break;
tprintf("rt_sigpending(%p, %u) = -1 EINVAL (%m)\n",
k_set, set_size);
}
if (!set_size)
perror_msg_and_fail("rt_sigpending");
tprintf("rt_sigpending(%s, %u) = 0\n", "[]", set_size);
iterate("[]", set_size >> 1, k_set + (set_size >> 1));
void *const efault = k_set + (set_size >> 1);
assert(k_sigpending(efault, set_size) == -1);
tprintf("rt_sigpending(%p, %u) = -1 EFAULT (%m)\n",
efault, set_size);
sigaddset(libc_set, SIGHUP);
if (sigprocmask(SIG_SETMASK, libc_set, NULL))
perror_msg_and_fail("sigprocmask");
raise(SIGHUP);
iterate("[HUP]", set_size, k_set);
sigaddset(libc_set, SIGINT);
if (sigprocmask(SIG_SETMASK, libc_set, NULL))
perror_msg_and_fail("sigprocmask");
raise(SIGINT);
iterate("[HUP INT]", set_size, k_set);
tprintf("+++ exited with 0 +++\n");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_rt_sigpending")
#endif