/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2008 Yahoo!, Inc.
* All rights reserved.
* Written by: John Baldwin <jhb@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/_semaphore.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <sys/user.h>
#include <sys/wait.h>
#include <errno.h>
#include <fcntl.h>
#include <kvm.h>
#include <limits.h>
#include <semaphore.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "test.h"
#define TEST_PATH "/tmp/posixsem_regression_test"
#define ELAPSED(elapsed, limit) (abs((elapsed) - (limit)) < 100)
/* Macros for passing child status to parent over a pipe. */
#define CSTAT(class, error) ((class) << 16 | (error))
#define CSTAT_CLASS(stat) ((stat) >> 16)
#define CSTAT_ERROR(stat) ((stat) & 0xffff)
/*
* Helper routine for tests that use a child process. This routine
* creates a pipe and forks a child process. The child process runs
* the 'func' routine which returns a status integer. The status
* integer gets written over the pipe to the parent and returned in
* '*stat'. If there is an error in pipe(), fork(), or wait() this
* returns -1 and fails the test.
*/
static int
child_worker(int (*func)(void *arg), void *arg, int *stat)
{
pid_t pid;
int pfd[2], cstat;
if (pipe(pfd) < 0) {
fail_errno("pipe");
return (-1);
}
pid = fork();
switch (pid) {
case -1:
/* Error. */
fail_errno("fork");
close(pfd[0]);
close(pfd[1]);
return (-1);
case 0:
/* Child. */
cstat = func(arg);
write(pfd[1], &cstat, sizeof(cstat));
exit(0);
}
if (read(pfd[0], stat, sizeof(*stat)) < 0) {
fail_errno("read(pipe)");
close(pfd[0]);
close(pfd[1]);
return (-1);
}
if (waitpid(pid, NULL, 0) < 0) {
fail_errno("wait");
close(pfd[0]);
close(pfd[1]);
return (-1);
}
close(pfd[0]);
close(pfd[1]);
return (0);
}
/*
* Attempt a ksem_open() that should fail with an expected error of
* 'error'.
*/
static void
ksem_open_should_fail(const char *path, int flags, mode_t mode, unsigned int
value, int error)
{
semid_t id;
if (ksem_open(&id, path, flags, mode, value) >= 0) {
fail_err("ksem_open() didn't fail");
ksem_close(id);
return;
}
if (errno != error) {
fail_errno("ksem_open");
return;
}
pass();
}
/*
* Attempt a ksem_unlink() that should fail with an expected error of
* 'error'.
*/
static void
ksem_unlink_should_fail(const char *path, int error)
{
if (ksem_unlink(path) >= 0) {
fail_err("ksem_unlink() didn't fail");
return;
}
if (errno != error) {
fail_errno("ksem_unlink");
return;
}
pass();
}
/*
* Attempt a ksem_close() that should fail with an expected error of
* 'error'.
*/
static void
ksem_close_should_fail(semid_t id, int error)
{
if (ksem_close(id) >= 0) {
fail_err("ksem_close() didn't fail");
return;
}
if (errno != error) {
fail_errno("ksem_close");
return;
}
pass();
}
/*
* Attempt a ksem_init() that should fail with an expected error of
* 'error'.
*/
static void
ksem_init_should_fail(unsigned int value, int error)
{
semid_t id;
if (ksem_init(&id, value) >= 0) {
fail_err("ksem_init() didn't fail");
ksem_destroy(id);
return;
}
if (errno != error) {
fail_errno("ksem_init");
return;
}
pass();
}
/*
* Attempt a ksem_destroy() that should fail with an expected error of
* 'error'.
*/
static void
ksem_destroy_should_fail(semid_t id, int error)
{
if (ksem_destroy(id) >= 0) {
fail_err("ksem_destroy() didn't fail");
return;
}
if (errno != error) {
fail_errno("ksem_destroy");
return;
}
pass();
}
/*
* Attempt a ksem_post() that should fail with an expected error of
* 'error'.
*/
static void
ksem_post_should_fail(semid_t id, int error)
{
if (ksem_post(id) >= 0) {
fail_err("ksem_post() didn't fail");
return;
}
if (errno != error) {
fail_errno("ksem_post");
return;
}
pass();
}
static void
open_after_unlink(void)
{
semid_t id;
if (ksem_open(&id, TEST_PATH, O_CREAT, 0777, 1) < 0) {
fail_errno("ksem_open(1)");
return;
}
ksem_close(id);
if (ksem_unlink(TEST_PATH) < 0) {
fail_errno("ksem_unlink");
return;
}
ksem_open_should_fail(TEST_PATH, O_RDONLY, 0777, 1, ENOENT);
}
TEST(open_after_unlink, "open after unlink");
static void
open_invalid_path(void)
{
ksem_open_should_fail("blah", 0, 0777, 1, EINVAL);
}
TEST(open_invalid_path, "open invalid path");
static void
open_extra_flags(void)
{
ksem_open_should_fail(TEST_PATH, O_RDONLY | O_DIRECT, 0777, 1, EINVAL);
}
TEST(open_extra_flags, "open with extra flags");
static void
open_bad_value(void)
{
(void)ksem_unlink(TEST_PATH);
ksem_open_should_fail(TEST_PATH, O_CREAT, 0777, UINT_MAX, EINVAL);
}
TEST(open_bad_value, "open with invalid initial value");
static void
open_bad_path_pointer(void)
{
ksem_open_should_fail((char *)1024, O_RDONLY, 0777, 1, EFAULT);
}
TEST(open_bad_path_pointer, "open bad path pointer");
static void
open_path_too_long(void)
{
char *page;
page = malloc(MAXPATHLEN + 1);
memset(page, 'a', MAXPATHLEN);
page[MAXPATHLEN] = '\0';
ksem_open_should_fail(page, O_RDONLY, 0777, 1, ENAMETOOLONG);
free(page);
}
TEST(open_path_too_long, "open pathname too long");
static void
open_nonexisting_semaphore(void)
{
ksem_open_should_fail("/notreallythere", 0, 0777, 1, ENOENT);
}
TEST(open_nonexisting_semaphore, "open nonexistent semaphore");
static void
exclusive_create_existing_semaphore(void)
{
semid_t id;
if (ksem_open(&id, TEST_PATH, O_CREAT, 0777, 1) < 0) {
fail_errno("ksem_open(O_CREAT)");
return;
}
ksem_close(id);
ksem_open_should_fail(TEST_PATH, O_CREAT | O_EXCL, 0777, 1, EEXIST);
ksem_unlink(TEST_PATH);
}
TEST(exclusive_create_existing_semaphore, "O_EXCL of existing semaphore");
static void
init_bad_value(void)
{
ksem_init_should_fail(UINT_MAX, EINVAL);
}
TEST(init_bad_value, "init with invalid initial value");
static void
unlink_bad_path_pointer(void)
{
ksem_unlink_should_fail((char *)1024, EFAULT);
}
TEST(unlink_bad_path_pointer, "unlink bad path pointer");
static void
unlink_path_too_long(void)
{
char *page;
page = malloc(MAXPATHLEN + 1);
memset(page, 'a', MAXPATHLEN);
page[MAXPATHLEN] = '\0';
ksem_unlink_should_fail(page, ENAMETOOLONG);
free(page);
}
TEST(unlink_path_too_long, "unlink pathname too long");
static void
destroy_named_semaphore(void)
{
semid_t id;
if (ksem_open(&id, TEST_PATH, O_CREAT, 0777, 1) < 0) {
fail_errno("ksem_open(O_CREAT)");
return;
}
ksem_destroy_should_fail(id, EINVAL);
ksem_close(id);
ksem_unlink(TEST_PATH);
}
TEST(destroy_named_semaphore, "destroy named semaphore");
static void
close_unnamed_semaphore(void)
{
semid_t id;
if (ksem_init(&id, 1) < 0) {
fail_errno("ksem_init");
return;
}
ksem_close_should_fail(id, EINVAL);
ksem_destroy(id);
}
TEST(close_unnamed_semaphore, "close unnamed semaphore");
static void
destroy_invalid_fd(void)
{
ksem_destroy_should_fail(STDERR_FILENO, EINVAL);
}
TEST(destroy_invalid_fd, "destroy non-semaphore file descriptor");
static void
close_invalid_fd(void)
{
ksem_close_should_fail(STDERR_FILENO, EINVAL);
}
TEST(close_invalid_fd, "close non-semaphore file descriptor");
static void
create_unnamed_semaphore(void)
{
semid_t id;
if (ksem_init(&id, 1) < 0) {
fail_errno("ksem_init");
return;
}
if (ksem_destroy(id) < 0) {
fail_errno("ksem_destroy");
return;
}
pass();
}
TEST(create_unnamed_semaphore, "create unnamed semaphore");
static void
open_named_semaphore(void)
{
semid_t id;
if (ksem_open(&id, TEST_PATH, O_CREAT, 0777, 1) < 0) {
fail_errno("ksem_open(O_CREAT)");
return;
}
if (ksem_close(id) < 0) {
fail_errno("ksem_close");
return;
}
if (ksem_unlink(TEST_PATH) < 0) {
fail_errno("ksem_unlink");
return;
}
pass();
}
TEST(open_named_semaphore, "create named semaphore");
static void
getvalue_invalid_semaphore(void)
{
int val;
if (ksem_getvalue(STDERR_FILENO, &val) >= 0) {
fail_err("ksem_getvalue() didn't fail");
return;
}
if (errno != EINVAL) {
fail_errno("ksem_getvalue");
return;
}
pass();
}
TEST(getvalue_invalid_semaphore, "get value of invalid semaphore");
static void
post_invalid_semaphore(void)
{
ksem_post_should_fail(STDERR_FILENO, EINVAL);
}
TEST(post_invalid_semaphore, "post of invalid semaphore");
static void
wait_invalid_semaphore(void)
{
if (ksem_wait(STDERR_FILENO) >= 0) {
fail_err("ksem_wait() didn't fail");
return;
}
if (errno != EINVAL) {
fail_errno("ksem_wait");
return;
}
pass();
}
TEST(wait_invalid_semaphore, "wait for invalid semaphore");
static void
trywait_invalid_semaphore(void)
{
if (ksem_trywait(STDERR_FILENO) >= 0) {
fail_err("ksem_trywait() didn't fail");
return;
}
if (errno != EINVAL) {
fail_errno("ksem_trywait");
return;
}
pass();
}
TEST(trywait_invalid_semaphore, "try wait for invalid semaphore");
static void
timedwait_invalid_semaphore(void)
{
if (ksem_timedwait(STDERR_FILENO, NULL) >= 0) {
fail_err("ksem_timedwait() didn't fail");
return;
}
if (errno != EINVAL) {
fail_errno("ksem_timedwait");
return;
}
pass();
}
TEST(timedwait_invalid_semaphore, "timed wait for invalid semaphore");
static int
checkvalue(semid_t id, int expected)
{
int val;
if (ksem_getvalue(id, &val) < 0) {
fail_errno("ksem_getvalue");
return (-1);
}
if (val != expected) {
fail_err("sem value should be %d instead of %d", expected, val);
return (-1);
}
return (0);
}
static void
post_test(void)
{
semid_t id;
if (ksem_init(&id, 1) < 0) {
fail_errno("ksem_init");
return;
}
if (checkvalue(id, 1) < 0) {
ksem_destroy(id);
return;
}
if (ksem_post(id) < 0) {
fail_errno("ksem_post");
ksem_destroy(id);
return;
}
if (checkvalue(id, 2) < 0) {
ksem_destroy(id);
return;
}
if (ksem_destroy(id) < 0) {
fail_errno("ksem_destroy");
return;
}
pass();
}
TEST(post_test, "simple post");
static void
use_after_unlink_test(void)
{
semid_t id;
/*
* Create named semaphore with value of 1 and then unlink it
* while still retaining the initial reference.
*/
if (ksem_open(&id, TEST_PATH, O_CREAT | O_EXCL, 0777, 1) < 0) {
fail_errno("ksem_open(O_CREAT | O_EXCL)");
return;
}
if (ksem_unlink(TEST_PATH) < 0) {
fail_errno("ksem_unlink");
ksem_close(id);
return;
}
if (checkvalue(id, 1) < 0) {
ksem_close(id);
return;
}
/* Post the semaphore to set its value to 2. */
if (ksem_post(id) < 0) {
fail_errno("ksem_post");
ksem_close(id);
return;
}
if (checkvalue(id, 2) < 0) {
ksem_close(id);
return;
}
/* Wait on the semaphore which should set its value to 1. */
if (ksem_wait(id) < 0) {
fail_errno("ksem_wait");
ksem_close(id);
return;
}
if (checkvalue(id, 1) < 0) {
ksem_close(id);
return;
}
if (ksem_close(id) < 0) {
fail_errno("ksem_close");
return;
}
pass();
}
TEST(use_after_unlink_test, "use named semaphore after unlink");
static void
unlocked_trywait(void)
{
semid_t id;
if (ksem_init(&id, 1) < 0) {
fail_errno("ksem_init");
return;
}
/* This should succeed and decrement the value to 0. */
if (ksem_trywait(id) < 0) {
fail_errno("ksem_trywait()");
ksem_destroy(id);
return;
}
if (checkvalue(id, 0) < 0) {
ksem_destroy(id);
return;
}
if (ksem_destroy(id) < 0) {
fail_errno("ksem_destroy");
return;
}
pass();
}
TEST(unlocked_trywait, "unlocked trywait");
static void
locked_trywait(void)
{
semid_t id;
if (ksem_init(&id, 0) < 0) {
fail_errno("ksem_init");
return;
}
/* This should fail with EAGAIN and leave the value at 0. */
if (ksem_trywait(id) >= 0) {
fail_err("ksem_trywait() didn't fail");
ksem_destroy(id);
return;
}
if (errno != EAGAIN) {
fail_errno("wrong error from ksem_trywait()");
ksem_destroy(id);
return;
}
if (checkvalue(id, 0) < 0) {
ksem_destroy(id);
return;
}
if (ksem_destroy(id) < 0) {
fail_errno("ksem_destroy");
return;
}
pass();
}
TEST(locked_trywait, "locked trywait");
/*
* Use a timer to post a specific semaphore after a timeout. A timer
* is scheduled via schedule_post(). check_alarm() must be called
* afterwards to clean up and check for errors.
*/
static semid_t alarm_id = -1;
static int alarm_errno;
static int alarm_handler_installed;
static void
alarm_handler(int signo)
{
if (ksem_post(alarm_id) < 0)
alarm_errno = errno;
}
static int
check_alarm(int just_clear)
{
struct itimerval it;
bzero(&it, sizeof(it));
if (just_clear) {
setitimer(ITIMER_REAL, &it, NULL);
alarm_errno = 0;
alarm_id = -1;
return (0);
}
if (setitimer(ITIMER_REAL, &it, NULL) < 0) {
fail_errno("setitimer");
return (-1);
}
if (alarm_errno != 0 && !just_clear) {
errno = alarm_errno;
fail_errno("ksem_post() (via timeout)");
alarm_errno = 0;
return (-1);
}
alarm_id = -1;
return (0);
}
static int
schedule_post(semid_t id, u_int msec)
{
struct itimerval it;
if (!alarm_handler_installed) {
if (signal(SIGALRM, alarm_handler) == SIG_ERR) {
fail_errno("signal(SIGALRM)");
return (-1);
}
alarm_handler_installed = 1;
}
if (alarm_id != -1) {
fail_err("ksem_post() already scheduled");
return (-1);
}
alarm_id = id;
bzero(&it, sizeof(it));
it.it_value.tv_sec = msec / 1000;
it.it_value.tv_usec = (msec % 1000) * 1000;
if (setitimer(ITIMER_REAL, &it, NULL) < 0) {
fail_errno("setitimer");
return (-1);
}
return (0);
}
static int
timedwait(semid_t id, u_int msec, u_int *delta, int error)
{
struct timespec start, end;
if (clock_gettime(CLOCK_REALTIME, &start) < 0) {
fail_errno("clock_gettime(CLOCK_REALTIME)");
return (-1);
}
end.tv_sec = msec / 1000;
end.tv_nsec = msec % 1000 * 1000000;
timespecadd(&end, &start, &end);
if (ksem_timedwait(id, &end) < 0) {
if (errno != error) {
fail_errno("ksem_timedwait");
return (-1);
}
} else if (error != 0) {
fail_err("ksem_timedwait() didn't fail");
return (-1);
}
if (clock_gettime(CLOCK_REALTIME, &end) < 0) {
fail_errno("clock_gettime(CLOCK_REALTIME)");
return (-1);
}
timespecsub(&end, &start, &end);
*delta = end.tv_nsec / 1000000;
*delta += end.tv_sec * 1000;
return (0);
}
static void
unlocked_timedwait(void)
{
semid_t id;
u_int elapsed;
if (ksem_init(&id, 1) < 0) {
fail_errno("ksem_init");
return;
}
/* This should succeed right away and set the value to 0. */
if (timedwait(id, 5000, &elapsed, 0) < 0) {
ksem_destroy(id);
return;
}
if (!ELAPSED(elapsed, 0)) {
fail_err("ksem_timedwait() of unlocked sem took %ums", elapsed);
ksem_destroy(id);
return;
}
if (checkvalue(id, 0) < 0) {
ksem_destroy(id);
return;
}
if (ksem_destroy(id) < 0) {
fail_errno("ksem_destroy");
return;
}
pass();
}
TEST(unlocked_timedwait, "unlocked timedwait");
static void
expired_timedwait(void)
{
semid_t id;
u_int elapsed;
if (ksem_init(&id, 0) < 0) {
fail_errno("ksem_init");
return;
}
/* This should fail with a timeout and leave the value at 0. */
if (timedwait(id, 2500, &elapsed, ETIMEDOUT) < 0) {
ksem_destroy(id);
return;
}
if (!ELAPSED(elapsed, 2500)) {
fail_err(
"ksem_timedwait() of locked sem took %ums instead of 2500ms",
elapsed);
ksem_destroy(id);
return;
}
if (checkvalue(id, 0) < 0) {
ksem_destroy(id);
return;
}
if (ksem_destroy(id) < 0) {
fail_errno("ksem_destroy");
return;
}
pass();
}
TEST(expired_timedwait, "locked timedwait timeout");
static void
locked_timedwait(void)
{
semid_t id;
u_int elapsed;
if (ksem_init(&id, 0) < 0) {
fail_errno("ksem_init");
return;
}
/*
* Schedule a post to trigger after 1000 ms. The subsequent
* timedwait should succeed after 1000 ms as a result w/o
* timing out.
*/
if (schedule_post(id, 1000) < 0) {
ksem_destroy(id);
return;
}
if (timedwait(id, 2000, &elapsed, 0) < 0) {
check_alarm(1);
ksem_destroy(id);
return;
}
if (!ELAPSED(elapsed, 1000)) {
fail_err(
"ksem_timedwait() with delayed post took %ums instead of 1000ms",
elapsed);
check_alarm(1);
ksem_destroy(id);
return;
}
if (check_alarm(0) < 0) {
ksem_destroy(id);
return;
}
if (ksem_destroy(id) < 0) {
fail_errno("ksem_destroy");
return;
}
pass();
}
TEST(locked_timedwait, "locked timedwait");
static int
testwait(semid_t id, u_int *delta)
{
struct timespec start, end;
if (clock_gettime(CLOCK_REALTIME, &start) < 0) {
fail_errno("clock_gettime(CLOCK_REALTIME)");
return (-1);
}
if (ksem_wait(id) < 0) {
fail_errno("ksem_wait");
return (-1);
}
if (clock_gettime(CLOCK_REALTIME, &end) < 0) {
fail_errno("clock_gettime(CLOCK_REALTIME)");
return (-1);
}
timespecsub(&end, &start, &end);
*delta = end.tv_nsec / 1000000;
*delta += end.tv_sec * 1000;
return (0);
}
static void
unlocked_wait(void)
{
semid_t id;
u_int elapsed;
if (ksem_init(&id, 1) < 0) {
fail_errno("ksem_init");
return;
}
/* This should succeed right away and set the value to 0. */
if (testwait(id, &elapsed) < 0) {
ksem_destroy(id);
return;
}
if (!ELAPSED(elapsed, 0)) {
fail_err("ksem_wait() of unlocked sem took %ums", elapsed);
ksem_destroy(id);
return;
}
if (checkvalue(id, 0) < 0) {
ksem_destroy(id);
return;
}
if (ksem_destroy(id) < 0) {
fail_errno("ksem_destroy");
return;
}
pass();
}
TEST(unlocked_wait, "unlocked wait");
static void
locked_wait(void)
{
semid_t id;
u_int elapsed;
if (ksem_init(&id, 0) < 0) {
fail_errno("ksem_init");
return;
}
/*
* Schedule a post to trigger after 1000 ms. The subsequent
* wait should succeed after 1000 ms as a result.
*/
if (schedule_post(id, 1000) < 0) {
ksem_destroy(id);
return;
}
if (testwait(id, &elapsed) < 0) {
check_alarm(1);
ksem_destroy(id);
return;
}
if (!ELAPSED(elapsed, 1000)) {
fail_err(
"ksem_wait() with delayed post took %ums instead of 1000ms",
elapsed);
check_alarm(1);
ksem_destroy(id);
return;
}
if (check_alarm(0) < 0) {
ksem_destroy(id);
return;
}
if (ksem_destroy(id) < 0) {
fail_errno("ksem_destroy");
return;
}
pass();
}
TEST(locked_wait, "locked wait");
/*
* Fork off a child process. The child will open the semaphore via
* the same name. The child will then block on the semaphore waiting
* for the parent to post it.
*/
static int
wait_twoproc_child(void *arg)
{
semid_t id;
if (ksem_open(&id, TEST_PATH, 0, 0, 0) < 0)
return (CSTAT(1, errno));
if (ksem_wait(id) < 0)
return (CSTAT(2, errno));
if (ksem_close(id) < 0)
return (CSTAT(3, errno));
return (CSTAT(0, 0));
}
static void
wait_twoproc_test(void)
{
semid_t id;
int stat;
if (ksem_open(&id, TEST_PATH, O_CREAT, 0777, 0)) {
fail_errno("ksem_open");
return;
}
if (schedule_post(id, 500) < 0) {
ksem_close(id);
ksem_unlink(TEST_PATH);
return;
}
if (child_worker(wait_twoproc_child, NULL, &stat) < 0) {
check_alarm(1);
ksem_close(id);
ksem_unlink(TEST_PATH);
return;
}
errno = CSTAT_ERROR(stat);
switch (CSTAT_CLASS(stat)) {
case 0:
pass();
break;
case 1:
fail_errno("child ksem_open()");
break;
case 2:
fail_errno("child ksem_wait()");
break;
case 3:
fail_errno("child ksem_close()");
break;
default:
fail_err("bad child state %#x", stat);
break;
}
check_alarm(1);
ksem_close(id);
ksem_unlink(TEST_PATH);
}
TEST(wait_twoproc_test, "two proc wait");
static void
maxvalue_test(void)
{
semid_t id;
int val;
if (ksem_init(&id, SEM_VALUE_MAX) < 0) {
fail_errno("ksem_init");
return;
}
if (ksem_getvalue(id, &val) < 0) {
fail_errno("ksem_getvalue");
ksem_destroy(id);
return;
}
if (val != SEM_VALUE_MAX) {
fail_err("value %d != SEM_VALUE_MAX");
ksem_destroy(id);
return;
}
if (val < 0) {
fail_err("value < 0");
ksem_destroy(id);
return;
}
if (ksem_destroy(id) < 0) {
fail_errno("ksem_destroy");
return;
}
pass();
}
TEST(maxvalue_test, "get value of SEM_VALUE_MAX semaphore");
static void
maxvalue_post_test(void)
{
semid_t id;
if (ksem_init(&id, SEM_VALUE_MAX) < 0) {
fail_errno("ksem_init");
return;
}
ksem_post_should_fail(id, EOVERFLOW);
ksem_destroy(id);
}
TEST(maxvalue_post_test, "post SEM_VALUE_MAX semaphore");
static void
busy_destroy_test(void)
{
char errbuf[_POSIX2_LINE_MAX];
struct kinfo_proc *kp;
semid_t id;
pid_t pid;
kvm_t *kd;
int count;
kd = kvm_openfiles(NULL, "/dev/null", NULL, O_RDONLY, errbuf);
if (kd == NULL) {
fail_err("kvm_openfiles: %s", errbuf);
return;
}
if (ksem_init(&id, 0) < 0) {
fail_errno("ksem_init");
kvm_close(kd);
return;
}
pid = fork();
switch (pid) {
case -1:
/* Error. */
fail_errno("fork");
ksem_destroy(id);
kvm_close(kd);
return;
case 0:
/* Child. */
ksem_wait(id);
exit(0);
}
/*
* Wait for the child process to block on the semaphore. This
* is a bit gross.
*/
for (;;) {
kp = kvm_getprocs(kd, KERN_PROC_PID, pid, &count);
if (kp == NULL) {
fail_err("kvm_getprocs: %s", kvm_geterr(kd));
kvm_close(kd);
ksem_destroy(id);
return;
}
if (kp->ki_stat == SSLEEP &&
(strcmp(kp->ki_wmesg, "sem") == 0 ||
strcmp(kp->ki_wmesg, "ksem") == 0))
break;
usleep(1000);
}
kvm_close(kd);
ksem_destroy_should_fail(id, EBUSY);
/* Cleanup. */
ksem_post(id);
waitpid(pid, NULL, 0);
ksem_destroy(id);
}
TEST(busy_destroy_test, "destroy unnamed semaphore with waiter");
static int
exhaust_unnamed_child(void *arg)
{
semid_t id;
int i, max;
max = (intptr_t)arg;
for (i = 0; i < max + 1; i++) {
if (ksem_init(&id, 1) < 0) {
if (errno == ENOSPC)
return (CSTAT(0, 0));
return (CSTAT(1, errno));
}
}
return (CSTAT(2, 0));
}
static void
exhaust_unnamed_sems(void)
{
size_t len;
int nsems_max, stat;
len = sizeof(nsems_max);
if (sysctlbyname("p1003_1b.sem_nsems_max", &nsems_max, &len, NULL, 0) <
0) {
fail_errno("sysctl(p1003_1b.sem_nsems_max)");
return;
}
if (child_worker(exhaust_unnamed_child, (void *)(uintptr_t)nsems_max,
&stat))
return;
errno = CSTAT_ERROR(stat);
switch (CSTAT_CLASS(stat)) {
case 0:
pass();
break;
case 1:
fail_errno("ksem_init");
break;
case 2:
fail_err("Limit of %d semaphores not enforced", nsems_max);
break;
default:
fail_err("bad child state %#x", stat);
break;
}
}
TEST(exhaust_unnamed_sems, "exhaust unnamed semaphores (1)");
static int
exhaust_named_child(void *arg)
{
char buffer[64];
semid_t id;
int i, max;
max = (intptr_t)arg;
for (i = 0; i < max + 1; i++) {
snprintf(buffer, sizeof(buffer), "%s%d", TEST_PATH, i);
if (ksem_open(&id, buffer, O_CREAT, 0777, 1) < 0) {
if (errno == ENOSPC || errno == EMFILE ||
errno == ENFILE)
return (CSTAT(0, 0));
return (CSTAT(1, errno));
}
}
return (CSTAT(2, errno));
}
static void
exhaust_named_sems(void)
{
char buffer[64];
size_t len;
int i, nsems_max, stat;
len = sizeof(nsems_max);
if (sysctlbyname("p1003_1b.sem_nsems_max", &nsems_max, &len, NULL, 0) <
0) {
fail_errno("sysctl(p1003_1b.sem_nsems_max)");
return;
}
if (child_worker(exhaust_named_child, (void *)(uintptr_t)nsems_max,
&stat) < 0)
return;
errno = CSTAT_ERROR(stat);
switch (CSTAT_CLASS(stat)) {
case 0:
pass();
break;
case 1:
fail_errno("ksem_open");
break;
case 2:
fail_err("Limit of %d semaphores not enforced", nsems_max);
break;
default:
fail_err("bad child state %#x", stat);
break;
}
/* Cleanup any semaphores created by the child. */
for (i = 0; i < nsems_max + 1; i++) {
snprintf(buffer, sizeof(buffer), "%s%d", TEST_PATH, i);
ksem_unlink(buffer);
}
}
TEST(exhaust_named_sems, "exhaust named semaphores (1)");
static int
fdlimit_set(void *arg)
{
struct rlimit rlim;
int max;
max = (intptr_t)arg;
if (getrlimit(RLIMIT_NOFILE, &rlim) < 0)
return (CSTAT(3, errno));
rlim.rlim_cur = max;
if (setrlimit(RLIMIT_NOFILE, &rlim) < 0)
return (CSTAT(4, errno));
return (0);
}
static int
fdlimit_unnamed_child(void *arg)
{
int stat;
stat = fdlimit_set(arg);
if (stat == 0)
stat = exhaust_unnamed_child(arg);
return (stat);
}
static void
fdlimit_unnamed_sems(void)
{
int nsems_max, stat;
nsems_max = 10;
if (child_worker(fdlimit_unnamed_child, (void *)(uintptr_t)nsems_max,
&stat))
return;
errno = CSTAT_ERROR(stat);
switch (CSTAT_CLASS(stat)) {
case 0:
pass();
break;
case 1:
fail_errno("ksem_init");
break;
case 2:
fail_err("Limit of %d semaphores not enforced", nsems_max);
break;
case 3:
fail_errno("getrlimit");
break;
case 4:
fail_errno("getrlimit");
break;
default:
fail_err("bad child state %#x", stat);
break;
}
}
TEST(fdlimit_unnamed_sems, "exhaust unnamed semaphores (2)");
static int
fdlimit_named_child(void *arg)
{
int stat;
stat = fdlimit_set(arg);
if (stat == 0)
stat = exhaust_named_child(arg);
return (stat);
}
static void
fdlimit_named_sems(void)
{
char buffer[64];
int i, nsems_max, stat;
nsems_max = 10;
if (child_worker(fdlimit_named_child, (void *)(uintptr_t)nsems_max,
&stat) < 0)
return;
errno = CSTAT_ERROR(stat);
switch (CSTAT_CLASS(stat)) {
case 0:
pass();
break;
case 1:
fail_errno("ksem_open");
break;
case 2:
fail_err("Limit of %d semaphores not enforced", nsems_max);
break;
case 3:
fail_errno("getrlimit");
break;
case 4:
fail_errno("getrlimit");
break;
default:
fail_err("bad child state %#x", stat);
break;
}
/* Cleanup any semaphores created by the child. */
for (i = 0; i < nsems_max + 1; i++) {
snprintf(buffer, sizeof(buffer), "%s%d", TEST_PATH, i);
ksem_unlink(buffer);
}
}
TEST(fdlimit_named_sems, "exhaust named semaphores (2)");
int
main(int argc, char *argv[])
{
signal(SIGSYS, SIG_IGN);
run_tests();
return (0);
}
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