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/*
* Check decoding of poll syscall.
*
* Copyright (c) 2016-2018 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"
#ifdef __NR_poll
# include <assert.h>
# include <errno.h>
# include <poll.h>
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include <unistd.h>
# define PRINT_EVENT(flag, member) \
do { \
if (member & flag) { \
if (member != pfd->member) \
tprintf("|"); \
tprintf(#flag); \
member &= ~flag; \
} \
} while (0)
static void
print_pollfd_entering(const struct pollfd *const pfd)
{
tprintf("{fd=%d", pfd->fd);
if (pfd->fd >= 0) {
tprintf(", events=");
short events = pfd->events;
if (pfd->events) {
PRINT_EVENT(POLLIN, events);
PRINT_EVENT(POLLPRI, events);
PRINT_EVENT(POLLOUT, events);
# ifdef POLLRDNORM
PRINT_EVENT(POLLRDNORM, events);
# endif
# ifdef POLLWRNORM
PRINT_EVENT(POLLWRNORM, events);
# endif
# ifdef POLLRDBAND
PRINT_EVENT(POLLRDBAND, events);
# endif
# ifdef POLLWRBAND
PRINT_EVENT(POLLWRBAND, events);
# endif
PRINT_EVENT(POLLERR, events);
PRINT_EVENT(POLLHUP, events);
PRINT_EVENT(POLLNVAL, events);
} else
tprintf("0");
}
tprintf("}");
}
static void
print_pollfd_array_entering(const struct pollfd *const pfd,
const unsigned int size,
const unsigned int valid,
const unsigned int abbrev)
{
tprintf("[");
for (unsigned int i = 0; i < size; ++i) {
if (i)
tprintf(", ");
if (i >= valid) {
tprintf("... /* %p */", &pfd[i]);
break;
}
if (i >= abbrev) {
tprintf("...");
break;
}
print_pollfd_entering(&pfd[i]);
}
tprintf("]");
}
static void
print_pollfd_exiting(const struct pollfd *const pfd,
unsigned int *const seen,
const unsigned int abbrev)
{
if (!pfd->revents || pfd->fd < 0 || *seen > abbrev)
return;
if (*seen)
tprintf(", ");
++(*seen);
if (*seen > abbrev) {
tprintf("...");
return;
}
tprintf("{fd=%d, revents=", pfd->fd);
short revents = pfd->revents;
PRINT_EVENT(POLLIN, revents);
PRINT_EVENT(POLLPRI, revents);
PRINT_EVENT(POLLOUT, revents);
# ifdef POLLRDNORM
PRINT_EVENT(POLLRDNORM, revents);
# endif
# ifdef POLLWRNORM
PRINT_EVENT(POLLWRNORM, revents);
# endif
# ifdef POLLRDBAND
PRINT_EVENT(POLLRDBAND, revents);
# endif
# ifdef POLLWRBAND
PRINT_EVENT(POLLWRBAND, revents);
# endif
PRINT_EVENT(POLLERR, revents);
PRINT_EVENT(POLLHUP, revents);
PRINT_EVENT(POLLNVAL, revents);
tprintf("}");
}
static void
print_pollfd_array_exiting(const struct pollfd *const pfd,
const unsigned int size,
const unsigned int abbrev)
{
tprintf("[");
unsigned int seen = 0;
for (unsigned int i = 0; i < size; ++i)
print_pollfd_exiting(&pfd[i], &seen, abbrev);
tprintf("]");
}
int
main(int ac, char **av)
{
# ifdef PATH_TRACING_FD
skip_if_unavailable("/proc/self/fd/");
# endif
tprintf("%s", "");
assert(syscall(__NR_poll, NULL, 42, 0) == -1);
if (ENOSYS == errno)
perror_msg_and_skip("poll");
# ifndef PATH_TRACING_FD
tprintf("poll(NULL, 42, 0)" RVAL_EFAULT);
# endif
int fds[2];
if (pipe(fds) || pipe(fds))
perror_msg_and_fail("pipe");
const unsigned int abbrev = (ac > 1) ? atoi(av[1]) : -1;
const struct pollfd pfds0[] = {
{ .fd = 0, .events = POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND },
{ .fd = 1, .events = POLLOUT | POLLWRNORM | POLLWRBAND },
{ .fd = fds[0], .events = POLLIN | POLLPRI },
{ .fd = fds[1], .events = POLLOUT },
{ .fd = 2, .events = POLLOUT | POLLWRBAND }
};
struct pollfd *const tail_fds0 = tail_memdup(pfds0, sizeof(pfds0));
const int timeout = 42;
int rc = syscall(__NR_poll, tail_fds0, 0, timeout);
assert(rc == 0);
# ifndef PATH_TRACING_FD
tprintf("poll([], 0, %d) = %d (Timeout)\n", timeout, rc);
# endif
rc = syscall(__NR_poll, tail_fds0, ARRAY_SIZE(pfds0), timeout);
assert(rc == 3);
# ifndef PATH_TRACING_FD
tprintf("poll(");
print_pollfd_array_entering(tail_fds0, ARRAY_SIZE(pfds0),
ARRAY_SIZE(pfds0), abbrev);
tprintf(", %u, %d) = %d (",
(unsigned int) ARRAY_SIZE(pfds0), timeout, rc);
print_pollfd_array_exiting(tail_fds0, ARRAY_SIZE(pfds0), abbrev);
tprintf(")\n");
# endif /* !PATH_TRACING_FD */
tail_fds0[0].fd = -1;
tail_fds0[2].fd = -3;
tail_fds0[4].events = 0;
rc = syscall(__NR_poll, tail_fds0, ARRAY_SIZE(pfds0), timeout);
assert(rc == 2);
# ifndef PATH_TRACING_FD
tprintf("poll(");
print_pollfd_array_entering(tail_fds0, ARRAY_SIZE(pfds0),
ARRAY_SIZE(pfds0), abbrev);
tprintf(", %u, %d) = %d (",
(unsigned int) ARRAY_SIZE(pfds0), timeout, rc);
print_pollfd_array_exiting(tail_fds0, ARRAY_SIZE(pfds0), abbrev);
tprintf(")\n");
# endif /* !PATH_TRACING_FD */
tail_fds0[1].fd = -2;
tail_fds0[4].fd = -5;
rc = syscall(__NR_poll, tail_fds0, ARRAY_SIZE(pfds0), timeout);
assert(rc == 1);
# ifndef PATH_TRACING_FD
tprintf("poll(");
print_pollfd_array_entering(tail_fds0, ARRAY_SIZE(pfds0),
ARRAY_SIZE(pfds0), abbrev);
tprintf(", %u, %d) = %d (",
(unsigned int) ARRAY_SIZE(pfds0), timeout, rc);
print_pollfd_array_exiting(tail_fds0, ARRAY_SIZE(pfds0), abbrev);
tprintf(")\n");
# endif /* !PATH_TRACING_FD */
struct pollfd pfds1[] = {
{ .fd = 1, .events = POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND },
{ .fd = 0, .events = POLLOUT | POLLWRNORM | POLLWRBAND }
};
struct pollfd *const tail_fds1 = tail_memdup(pfds1, sizeof(pfds1));
rc = syscall(__NR_poll, tail_fds1, ARRAY_SIZE(pfds1), timeout);
assert(rc == 0);
# ifndef PATH_TRACING_FD
tprintf("poll(");
print_pollfd_array_entering(tail_fds1, ARRAY_SIZE(pfds1),
ARRAY_SIZE(pfds1), abbrev);
tprintf(", %u, %d) = %d (Timeout)\n",
(unsigned int) ARRAY_SIZE(pfds1), timeout, rc);
# endif /* !PATH_TRACING_FD */
const void *const efault = tail_fds0 + ARRAY_SIZE(pfds0);
rc = syscall(__NR_poll, efault, 1, 0);
assert(rc == -1);
# ifndef PATH_TRACING_FD
tprintf("poll(%p, 1, 0)" RVAL_EFAULT, efault);
# endif
const unsigned int valid = 1;
const void *const epfds = tail_fds0 + ARRAY_SIZE(pfds0) - valid;
rc = syscall(__NR_poll, epfds, valid + 1, 0);
assert(rc == -1);
# ifndef PATH_TRACING_FD
tprintf("poll(");
print_pollfd_array_entering(epfds, valid + 1, valid, abbrev);
errno = EFAULT;
tprintf(", %u, 0)" RVAL_EFAULT, valid + 1);
# endif /* !PATH_TRACING_FD */
# ifdef PATH_TRACING_FD
memcpy(tail_fds0, pfds0, sizeof(pfds0));
tail_fds0[4].fd = PATH_TRACING_FD;
rc = syscall(__NR_poll, tail_fds0, ARRAY_SIZE(pfds0), timeout);
assert(rc == 3);
tprintf("poll(");
print_pollfd_array_entering(tail_fds0, ARRAY_SIZE(pfds0),
ARRAY_SIZE(pfds0), abbrev);
tprintf(", %u, %d) = %d (",
(unsigned int) ARRAY_SIZE(pfds0), timeout, rc);
print_pollfd_array_exiting(tail_fds0, ARRAY_SIZE(pfds0), abbrev);
tprintf(")\n");
rc = syscall(__NR_poll, epfds, valid + 1, 0);
assert(rc == -1);
/* the 1st pollfd element is readable and contains PATH_TRACING_FD */
tprintf("poll(");
print_pollfd_array_entering(epfds, valid + 1, valid, abbrev);
errno = EFAULT;
tprintf(", %u, 0)" RVAL_EFAULT, valid + 1);
# endif /* PATH_TRACING_FD */
tprintf("+++ exited with 0 +++\n");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_poll")
#endif
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