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/*
* Check decoding of rt_sigpending 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 <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)) {
tprintf("rt_sigpending(%p, %u)" RVAL_EFAULT,
set, size);
break;
}
if (size) {
#ifdef 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);
TAIL_ALLOC_OBJECT_CONST_PTR(sigset_t, libc_set);
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)" RVAL_EINVAL,
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)" RVAL_EFAULT,
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;
}
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