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// SPDX-License-Identifier: GPL-2.0-or-later
/******************************************************************************
*
* Copyright FUJITSU LIMITED 2010
* Copyright KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
*
* DESCRIPTION
* Internally, Futex has two handling mode, anon and file. The private file
* mapping is special. At first it behave as file, but after write anything
* it behave as anon. This test is intent to test such case.
*
* AUTHOR
* KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
*
* HISTORY
* 2010-Jan-6: Initial version by KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
*
*****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <syscall.h>
#include <unistd.h>
#include <errno.h>
#include <linux/futex.h>
#include <pthread.h>
#include <libgen.h>
#include <signal.h>
#include "futextest.h"
#include "kselftest_harness.h"
#define PAGE_SZ 4096
char pad[PAGE_SZ] = {1};
futex_t val = 1;
char pad2[PAGE_SZ] = {1};
#define WAKE_WAIT_US 3000000
struct timespec wait_timeout = { .tv_sec = 5, .tv_nsec = 0};
void *thr_futex_wait(void *arg)
{
int ret;
ksft_print_dbg_msg("futex wait\n");
ret = futex_wait(&val, 1, &wait_timeout, 0);
if (ret && errno != EWOULDBLOCK && errno != ETIMEDOUT)
ksft_exit_fail_msg("futex error.\n");
if (ret && errno == ETIMEDOUT)
ksft_exit_fail_msg("waiter timedout\n");
ksft_print_dbg_msg("futex_wait: ret = %d, errno = %d\n", ret, errno);
return NULL;
}
TEST(wait_private_mapped_file)
{
pthread_t thr;
int res;
res = pthread_create(&thr, NULL, thr_futex_wait, NULL);
if (res < 0)
ksft_exit_fail_msg("pthread_create error\n");
ksft_print_dbg_msg("wait a while\n");
usleep(WAKE_WAIT_US);
val = 2;
res = futex_wake(&val, 1, 0);
ksft_print_dbg_msg("futex_wake %d\n", res);
if (res != 1)
ksft_exit_fail_msg("FUTEX_WAKE didn't find the waiting thread.\n");
ksft_print_dbg_msg("join\n");
pthread_join(thr, NULL);
ksft_test_result_pass("wait_private_mapped_file");
}
TEST_HARNESS_MAIN
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