/******************************************************************************
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*
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* Copyright FUJITSU LIMITED 2010
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* Copyright KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* DESCRIPTION
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* Internally, Futex has two handling mode, anon and file. The private file
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* mapping is special. At first it behave as file, but after write anything
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* it behave as anon. This test is intent to test such case.
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*
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* AUTHOR
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* KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
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*
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* HISTORY
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* 2010-Jan-6: Initial version by KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
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*
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*****************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <syscall.h>
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#include <unistd.h>
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#include <errno.h>
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#include <linux/futex.h>
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#include <pthread.h>
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#include <libgen.h>
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#include <signal.h>
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#include "logging.h"
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#include "futextest.h"
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#define TEST_NAME "futex-wait-private-mapped-file"
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#define PAGE_SZ 4096
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char pad[PAGE_SZ] = {1};
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futex_t val = 1;
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char pad2[PAGE_SZ] = {1};
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#define WAKE_WAIT_US 3000000
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struct timespec wait_timeout = { .tv_sec = 5, .tv_nsec = 0};
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void usage(char *prog)
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{
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printf("Usage: %s\n", prog);
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printf(" -c Use color\n");
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printf(" -h Display this help message\n");
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printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
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VQUIET, VCRITICAL, VINFO);
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}
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void *thr_futex_wait(void *arg)
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{
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int ret;
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info("futex wait\n");
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ret = futex_wait(&val, 1, &wait_timeout, 0);
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if (ret && errno != EWOULDBLOCK && errno != ETIMEDOUT) {
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error("futex error.\n", errno);
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print_result(TEST_NAME, RET_ERROR);
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exit(RET_ERROR);
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}
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if (ret && errno == ETIMEDOUT)
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fail("waiter timedout\n");
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info("futex_wait: ret = %d, errno = %d\n", ret, errno);
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return NULL;
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}
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int main(int argc, char **argv)
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{
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pthread_t thr;
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int ret = RET_PASS;
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int res;
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int c;
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while ((c = getopt(argc, argv, "chv:")) != -1) {
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switch (c) {
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case 'c':
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log_color(1);
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break;
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case 'h':
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usage(basename(argv[0]));
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exit(0);
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case 'v':
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log_verbosity(atoi(optarg));
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break;
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default:
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usage(basename(argv[0]));
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exit(1);
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}
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}
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ksft_print_header();
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ksft_print_msg(
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"%s: Test the futex value of private file mappings in FUTEX_WAIT\n",
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basename(argv[0]));
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ret = pthread_create(&thr, NULL, thr_futex_wait, NULL);
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if (ret < 0) {
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fprintf(stderr, "pthread_create error\n");
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ret = RET_ERROR;
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goto out;
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}
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info("wait a while\n");
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usleep(WAKE_WAIT_US);
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val = 2;
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res = futex_wake(&val, 1, 0);
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info("futex_wake %d\n", res);
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if (res != 1) {
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fail("FUTEX_WAKE didn't find the waiting thread.\n");
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ret = RET_FAIL;
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}
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info("join\n");
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pthread_join(thr, NULL);
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out:
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print_result(TEST_NAME, ret);
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return ret;
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}
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