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