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/*
* This file is part of rt_sigsuspend 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_sigsuspend
# include <assert.h>
# include <errno.h>
# include <signal.h>
# include <stdio.h>
# include <stdint.h>
# include <string.h>
# include <unistd.h>
static long
k_sigsuspend(const sigset_t *const set, const unsigned long size)
{
return syscall(__NR_rt_sigsuspend, set, size);
}
static void
iterate(const char *const text, const int sig,
const void *set, unsigned int size)
{
for (;;) {
raise(sig);
assert(k_sigsuspend(set, size) == -1);
if (EINTR == errno) {
tprintf("rt_sigsuspend(%s, %u) = ? ERESTARTNOHAND"
" (To be restarted if no handler)\n",
text, size);
} else {
if (size < sizeof(long))
tprintf("rt_sigsuspend(%p, %u)"
" = -1 EINVAL (%m)\n",
set, size);
else
tprintf("rt_sigsuspend(%s, %u)"
" = -1 EINVAL (%m)\n",
text, size);
}
if (!size)
break;
size >>= 1;
set += size;
}
}
static void
handler(int signo)
{
}
int
main(void)
{
tprintf("%s", "");
const unsigned int big_size = 1024 / 8;
void *k_set = tail_alloc(big_size);
memset(k_set, 0, big_size);
sigset_t *const libc_set = tail_alloc(sizeof(sigset_t));
sigemptyset(libc_set);
sigaddset(libc_set, SIGUSR1);
if (sigprocmask(SIG_SETMASK, libc_set, NULL))
perror_msg_and_fail("sigprocmask");
const struct sigaction sa = {
.sa_handler = handler
};
if (sigaction(SIGUSR1, &sa, NULL))
perror_msg_and_fail("sigaction");
raise(SIGUSR1);
unsigned int set_size = big_size;
for (; set_size; set_size >>= 1, k_set += set_size) {
assert(k_sigsuspend(k_set, set_size) == -1);
if (EINTR == errno)
break;
tprintf("rt_sigsuspend(%p, %u) = -1 EINVAL (%m)\n",
k_set, set_size);
}
if (!set_size)
perror_msg_and_fail("rt_sigsuspend");
tprintf("rt_sigsuspend([], %u) = ? ERESTARTNOHAND"
" (To be restarted if no handler)\n", set_size);
sigemptyset(libc_set);
sigaddset(libc_set, SIGUSR2);
memcpy(k_set, libc_set, set_size);
raise(SIGUSR1);
assert(k_sigsuspend(k_set, set_size) == -1);
assert(EINTR == errno);
tprintf("rt_sigsuspend([USR2], %u) = ? ERESTARTNOHAND"
" (To be restarted if no handler)\n", set_size);
sigaddset(libc_set, SIGHUP);
memcpy(k_set, libc_set, set_size);
raise(SIGUSR1);
assert(k_sigsuspend(k_set, set_size) == -1);
assert(EINTR == errno);
tprintf("rt_sigsuspend([HUP USR2], %u) = ? ERESTARTNOHAND"
" (To be restarted if no handler)\n", set_size);
sigaddset(libc_set, SIGINT);
memcpy(k_set, libc_set, set_size);
raise(SIGUSR1);
assert(k_sigsuspend(k_set, set_size) == -1);
assert(EINTR == errno);
tprintf("rt_sigsuspend([HUP INT USR2], %u) = ? ERESTARTNOHAND"
" (To be restarted if no handler)\n", set_size);
memset(libc_set, -1, sizeof(*libc_set));
sigdelset(libc_set, SIGUSR1);
memcpy(k_set, libc_set, set_size);
raise(SIGUSR1);
assert(k_sigsuspend(k_set, set_size) == -1);
assert(EINTR == errno);
tprintf("rt_sigsuspend(~[USR1], %u) = ? ERESTARTNOHAND"
" (To be restarted if no handler)\n", set_size);
assert(k_sigsuspend(k_set - set_size, set_size << 1) == -1);
tprintf("rt_sigsuspend(%p, %u) = -1 EINVAL (%m)\n",
k_set - set_size, set_size << 1);
iterate("~[USR1]", SIGUSR1, k_set, set_size >> 1);
tprintf("+++ exited with 0 +++\n");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_rt_sigsuspend")
#endif