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/*
* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2015-2018 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/*
* Based on test by Dr. David Alan Gilbert <dave@treblig.org>
*/
#include "tests.h"
#include "nsig.h"
#include <assert.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/select.h>
#include <asm/unistd.h>
#include <sys/time.h>
#ifdef __NR_pselect6
static fd_set set[3][0x1000000 / sizeof(fd_set)];
static void
handler(int signo)
{
}
int main(int ac, char **av)
{
int fds[2];
struct {
struct timespec ts;
int pad[2];
} tm_in = {
.ts = { .tv_sec = 0xc0de1, .tv_nsec = 0xc0de2 },
.pad = { 0xdeadbeef, 0xbadc0ded }
}, tm = tm_in;
sigset_t mask;
const struct sigaction act = { .sa_handler = handler };
const struct itimerval itv = { .it_value.tv_usec = 111111 };
sigemptyset(&mask);
sigaddset(&mask, SIGHUP);
sigaddset(&mask, SIGCHLD);
if (pipe(fds))
perror_msg_and_fail("pipe");
/*
* Start with a nice simple pselect.
*/
FD_SET(fds[0], set[0]);
FD_SET(fds[1], set[0]);
FD_SET(fds[0], set[1]);
FD_SET(fds[1], set[1]);
FD_SET(1, set[2]);
FD_SET(2, set[2]);
int rc = pselect(fds[1] + 1, set[0], set[1], set[2], NULL, NULL);
if (rc < 0)
perror_msg_and_skip("pselect");
assert(rc == 1);
printf("pselect6(%d, [%d %d], [%d %d], [1 2], NULL, {NULL, %u}) "
"= 1 (out [%d])\n",
fds[1] + 1, fds[0], fds[1],
fds[0], fds[1],
NSIG_BYTES, fds[1]);
/*
* Another simple one, with a timeout.
*/
FD_SET(1, set[1]);
FD_SET(2, set[1]);
FD_SET(fds[0], set[1]);
FD_SET(fds[1], set[1]);
assert(syscall(__NR_pselect6, fds[1] + 1, NULL, set[1], NULL, &tm.ts, NULL) == 3);
printf("pselect6(%d, NULL, [1 2 %d %d], NULL"
", {tv_sec=%lld, tv_nsec=%llu}, NULL) = 3 (out [1 2 %d]"
", left {tv_sec=%lld, tv_nsec=%llu})\n",
fds[1] + 1, fds[0], fds[1], (long long) tm_in.ts.tv_sec,
zero_extend_signed_to_ull(tm_in.ts.tv_nsec),
fds[1], (long long) tm.ts.tv_sec,
zero_extend_signed_to_ull(tm.ts.tv_nsec));
/*
* Now the crash case that trinity found, negative nfds
* but with a pointer to a large chunk of valid memory.
*/
FD_ZERO(set[0]);
FD_SET(fds[1], set[0]);
assert(pselect(-1, NULL, set[0], NULL, NULL, &mask) == -1);
printf("pselect6(-1, NULL, %p, NULL, NULL, {[HUP CHLD], %u}) "
"= -1 EINVAL (%m)\n", set[0], NSIG_BYTES);
/*
* Another variant, with nfds exceeding FD_SETSIZE limit.
*/
FD_ZERO(set[0]);
FD_SET(fds[0], set[0]);
FD_ZERO(set[1]);
tm.ts.tv_sec = 0;
tm.ts.tv_nsec = 123;
assert(pselect(FD_SETSIZE + 1, set[0], set[1], NULL, &tm.ts, &mask) == 0);
printf("pselect6(%d, [%d], [], NULL, {tv_sec=0, tv_nsec=123}"
", {[HUP CHLD], %u}) = 0 (Timeout)\n",
FD_SETSIZE + 1, fds[0], NSIG_BYTES);
/*
* See how timeouts are decoded.
*/
tm.ts.tv_sec = 0xdeadbeefU;
tm.ts.tv_nsec = 0xfacefeedU;
assert(pselect(0, NULL, NULL, NULL, &tm.ts, NULL) == -1);
printf("pselect6(0, NULL, NULL, NULL"
", {tv_sec=%lld, tv_nsec=%llu}, {NULL, %u}) = %s\n",
(long long) tm.ts.tv_sec,
zero_extend_signed_to_ull(tm.ts.tv_nsec),
NSIG_BYTES, sprintrc(-1));
tm.ts.tv_sec = (time_t) 0xcafef00ddeadbeefLL;
tm.ts.tv_nsec = (long) 0xbadc0dedfacefeedLL;
assert(pselect(0, NULL, NULL, NULL, &tm.ts, NULL) == -1);
printf("pselect6(0, NULL, NULL, NULL"
", {tv_sec=%lld, tv_nsec=%llu}, {NULL, %u}) = %s\n",
(long long) tm.ts.tv_sec,
zero_extend_signed_to_ull(tm.ts.tv_nsec),
NSIG_BYTES, sprintrc(-1));
assert(sigaction(SIGALRM, &act, NULL) == 0);
assert(setitimer(ITIMER_REAL, &itv, NULL) == 0);
tm.ts.tv_sec = 0;
tm.ts.tv_nsec = 222222222;
assert(pselect(0, NULL, NULL, NULL, &tm.ts, &mask) == -1);
printf("pselect6(0, NULL, NULL, NULL, {tv_sec=0, tv_nsec=222222222}"
", {[HUP CHLD], %u})"
" = ? ERESTARTNOHAND (To be restarted if no handler)\n",
NSIG_BYTES);
puts("--- SIGALRM {si_signo=SIGALRM, si_code=SI_KERNEL} ---");
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_pselect6")
#endif
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