mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-05 03:01:05 +00:00
5f3a7ebc35
It is similar to epoll_wait, with the difference the timeout has nanosecond resoluting by using struct timespec instead of int. Although Linux interface only provides 64 bit time_t support, old 32 bit interface is also provided (so keep in sync with current practice and to no force opt-in on 64 bit time_t). Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Florian Weimer <fweimer@redhat.com>
212 lines
5.2 KiB
C
212 lines
5.2 KiB
C
/* Basic tests for Linux epoll_* wrappers.
|
|
Copyright (C) 2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <intprops.h>
|
|
#include <support/check.h>
|
|
#include <support/support.h>
|
|
#include <support/xsignal.h>
|
|
#include <support/xunistd.h>
|
|
#include <support/xtime.h>
|
|
#include <stdlib.h>
|
|
#include <sys/epoll.h>
|
|
|
|
/* The test focus on checking if the timeout argument is correctly handled
|
|
by glibc wrappers. */
|
|
|
|
static void
|
|
handler (int sig)
|
|
{
|
|
}
|
|
|
|
typedef int (*epoll_wait_check_t) (int, struct epoll_event *, int,
|
|
int, const sigset_t *);
|
|
|
|
static void
|
|
test_epoll_basic (epoll_wait_check_t epoll_wait_check)
|
|
{
|
|
{
|
|
sigset_t ss_usr1;
|
|
sigemptyset (&ss_usr1);
|
|
sigaddset (&ss_usr1, SIGUSR1);
|
|
TEST_COMPARE (sigprocmask (SIG_BLOCK, &ss_usr1, NULL), 0);
|
|
}
|
|
|
|
int fds[2][2];
|
|
xpipe (fds[0]);
|
|
xpipe (fds[1]);
|
|
|
|
sigset_t ss;
|
|
TEST_COMPARE (sigprocmask (SIG_SETMASK, NULL, &ss), 0);
|
|
sigdelset (&ss, SIGUSR1);
|
|
|
|
int efd = epoll_create1 (0);
|
|
TEST_VERIFY_EXIT (efd != -1);
|
|
|
|
struct epoll_event event;
|
|
|
|
event.data.fd = fds[1][0];
|
|
event.events = EPOLLIN | EPOLLET;
|
|
TEST_COMPARE (epoll_ctl (efd, EPOLL_CTL_ADD, fds[1][0], &event), 0);
|
|
|
|
pid_t parent = getpid ();
|
|
pid_t p = xfork ();
|
|
if (p == 0)
|
|
{
|
|
xclose (fds[0][1]);
|
|
xclose (fds[1][0]);
|
|
|
|
event.data.fd = fds[0][0];
|
|
event.events = EPOLLIN | EPOLLET;
|
|
TEST_COMPARE (epoll_ctl (efd, EPOLL_CTL_ADD, fds[0][0], &event), 0);
|
|
|
|
int e;
|
|
do
|
|
{
|
|
if (getppid () != parent)
|
|
FAIL_EXIT1 ("getppid()=%d != parent=%d", getppid(), parent);
|
|
|
|
errno = 0;
|
|
e = epoll_wait_check (efd, &event, 1, 500, &ss);
|
|
}
|
|
while (e == 0);
|
|
|
|
TEST_COMPARE (e, -1);
|
|
TEST_COMPARE (errno, EINTR);
|
|
|
|
TEMP_FAILURE_RETRY (write (fds[1][1], "foo", 3));
|
|
|
|
exit (0);
|
|
}
|
|
|
|
xclose (fds[0][0]);
|
|
xclose (fds[1][1]);
|
|
|
|
/* Wait some time so child is blocked on the syscall. */
|
|
nanosleep (&(struct timespec) {0, 10000000}, NULL);
|
|
TEST_COMPARE (kill (p, SIGUSR1), 0);
|
|
|
|
int e = epoll_wait_check (efd, &event, 1, 500000000, &ss);
|
|
TEST_COMPARE (e, 1);
|
|
TEST_VERIFY (event.events & EPOLLIN);
|
|
|
|
xclose (fds[0][1]);
|
|
xclose (fds[1][0]);
|
|
xclose (efd);
|
|
}
|
|
|
|
|
|
static void
|
|
test_epoll_large_timeout (epoll_wait_check_t epoll_wait_check)
|
|
{
|
|
timer_t t = support_create_timer (0, 100000000, true, NULL);
|
|
|
|
int fds[2];
|
|
xpipe (fds);
|
|
|
|
fd_set rfds;
|
|
FD_ZERO (&rfds);
|
|
FD_SET (fds[0], &rfds);
|
|
|
|
sigset_t ss;
|
|
TEST_COMPARE (sigprocmask (SIG_SETMASK, NULL, &ss), 0);
|
|
sigdelset (&ss, SIGALRM);
|
|
|
|
int efd = epoll_create1 (0);
|
|
TEST_VERIFY_EXIT (efd != -1);
|
|
|
|
struct epoll_event event;
|
|
event.data.fd = fds[0];
|
|
event.events = EPOLLIN | EPOLLET;
|
|
TEST_COMPARE (epoll_ctl (efd, EPOLL_CTL_ADD, fds[0], &event), 0);
|
|
|
|
int tmo = TYPE_MAXIMUM (int);
|
|
TEST_COMPARE (epoll_wait_check (efd, &event, 1, tmo, &ss), -1);
|
|
TEST_VERIFY (errno == EINTR || errno == EOVERFLOW);
|
|
|
|
TEST_COMPARE (epoll_wait_check (efd, &event, 1, -1, &ss), -1);
|
|
TEST_VERIFY (errno == EINTR || errno == EOVERFLOW);
|
|
|
|
support_delete_timer (t);
|
|
|
|
xclose (fds[0]);
|
|
xclose (fds[1]);
|
|
xclose (efd);
|
|
}
|
|
|
|
|
|
static int
|
|
epoll_wait_check (int epfd, struct epoll_event *ev, int maxev, int tmo,
|
|
const sigset_t *ss)
|
|
{
|
|
sigset_t orig;
|
|
TEST_COMPARE (sigprocmask (SIG_SETMASK, ss, &orig), 0);
|
|
int r = epoll_wait (epfd, ev, maxev, tmo);
|
|
TEST_COMPARE (sigprocmask (SIG_SETMASK, &orig, NULL), 0);
|
|
return r;
|
|
}
|
|
|
|
static int
|
|
epoll_pwait_check (int epfd, struct epoll_event *ev, int maxev, int tmo,
|
|
const sigset_t *ss)
|
|
{
|
|
return epoll_pwait (epfd, ev, maxev, tmo, ss);
|
|
}
|
|
|
|
static int
|
|
epoll_pwait2_check (int epfd, struct epoll_event *ev, int maxev, int tmo,
|
|
const sigset_t *ss)
|
|
{
|
|
time_t s = tmo == -1 ? TYPE_MAXIMUM (time_t) : tmo / 1000;
|
|
long int ns = tmo == -1 ? 0 : (tmo % 1000) * 1000000;
|
|
return epoll_pwait2 (epfd, ev, maxev, &(struct timespec) { s, ns }, ss);
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
{
|
|
struct sigaction sa;
|
|
sa.sa_handler = handler;
|
|
sa.sa_flags = 0;
|
|
sigemptyset (&sa.sa_mask);
|
|
xsigaction (SIGUSR1, &sa, NULL);
|
|
|
|
sa.sa_handler = SIG_IGN;
|
|
xsigaction (SIGCHLD, &sa, NULL);
|
|
}
|
|
|
|
int r = epoll_pwait2 (-1, NULL, 0, NULL, NULL);
|
|
TEST_COMPARE (r, -1);
|
|
bool pwait2_supported = errno != ENOSYS;
|
|
|
|
test_epoll_basic (epoll_wait_check);
|
|
test_epoll_basic (epoll_pwait_check);
|
|
if (pwait2_supported)
|
|
test_epoll_basic (epoll_pwait2_check);
|
|
|
|
test_epoll_large_timeout (epoll_wait_check);
|
|
test_epoll_large_timeout (epoll_pwait_check);
|
|
if (pwait2_supported)
|
|
test_epoll_large_timeout (epoll_pwait2_check);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|