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1// SPDX-License-Identifier: GPL-2.0-or-later2/******************************************************************************3 *4 * Copyright FUJITSU LIMITED 20105 * Copyright KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>6 *7 * DESCRIPTION8 * Internally, Futex has two handling mode, anon and file. The private file9 * mapping is special. At first it behave as file, but after write anything10 * it behave as anon. This test is intent to test such case.11 *12 * AUTHOR13 * KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>14 *15 * HISTORY16 * 2010-Jan-6: Initial version by KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>17 *18 *****************************************************************************/19 20#include <stdio.h>21#include <stdlib.h>22#include <syscall.h>23#include <unistd.h>24#include <errno.h>25#include <linux/futex.h>26#include <pthread.h>27#include <libgen.h>28#include <signal.h>29 30#include "logging.h"31#include "futextest.h"32 33#define TEST_NAME "futex-wait-private-mapped-file"34#define PAGE_SZ 409635 36char pad[PAGE_SZ] = {1};37futex_t val = 1;38char pad2[PAGE_SZ] = {1};39 40#define WAKE_WAIT_US 300000041struct timespec wait_timeout = { .tv_sec = 5, .tv_nsec = 0};42 43void usage(char *prog)44{45 printf("Usage: %s\n", prog);46 printf(" -c Use color\n");47 printf(" -h Display this help message\n");48 printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",49 VQUIET, VCRITICAL, VINFO);50}51 52void *thr_futex_wait(void *arg)53{54 int ret;55 56 info("futex wait\n");57 ret = futex_wait(&val, 1, &wait_timeout, 0);58 if (ret && errno != EWOULDBLOCK && errno != ETIMEDOUT) {59 error("futex error.\n", errno);60 print_result(TEST_NAME, RET_ERROR);61 exit(RET_ERROR);62 }63 64 if (ret && errno == ETIMEDOUT)65 fail("waiter timedout\n");66 67 info("futex_wait: ret = %d, errno = %d\n", ret, errno);68 69 return NULL;70}71 72int main(int argc, char **argv)73{74 pthread_t thr;75 int ret = RET_PASS;76 int res;77 int c;78 79 while ((c = getopt(argc, argv, "chv:")) != -1) {80 switch (c) {81 case 'c':82 log_color(1);83 break;84 case 'h':85 usage(basename(argv[0]));86 exit(0);87 case 'v':88 log_verbosity(atoi(optarg));89 break;90 default:91 usage(basename(argv[0]));92 exit(1);93 }94 }95 96 ksft_print_header();97 ksft_set_plan(1);98 ksft_print_msg(99 "%s: Test the futex value of private file mappings in FUTEX_WAIT\n",100 basename(argv[0]));101 102 ret = pthread_create(&thr, NULL, thr_futex_wait, NULL);103 if (ret < 0) {104 fprintf(stderr, "pthread_create error\n");105 ret = RET_ERROR;106 goto out;107 }108 109 info("wait a while\n");110 usleep(WAKE_WAIT_US);111 val = 2;112 res = futex_wake(&val, 1, 0);113 info("futex_wake %d\n", res);114 if (res != 1) {115 fail("FUTEX_WAKE didn't find the waiting thread.\n");116 ret = RET_FAIL;117 }118 119 info("join\n");120 pthread_join(thr, NULL);121 122 out:123 print_result(TEST_NAME, ret);124 return ret;125}126