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/*
* Check decoding of rt_sigsuspend syscall.
*
* Copyright (c) 2016 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2016-2023 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#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 *const set, unsigned int size)
{
for (const void *mask = set;; size >>= 1, mask += size) {
raise(sig);
assert(k_sigsuspend(mask, 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)"
RVAL_EINVAL,
mask, size);
else
tprintf("rt_sigsuspend(%s, %u)"
RVAL_EINVAL,
set == mask ? text : "~[]", size);
}
if (!size)
break;
}
}
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);
TAIL_ALLOC_OBJECT_CONST_PTR(sigset_t, libc_set);
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)" RVAL_EINVAL,
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)" RVAL_EINVAL,
k_set - set_size, set_size << 1);
iterate("~[USR1]", SIGUSR1, k_set, set_size >> 1);
tprintf("+++ exited with 0 +++\n");
return 0;
}
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