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1// SPDX-License-Identifier: GPL-2.0-or-later2/******************************************************************************3 *4 * Copyright © International Business Machines Corp., 20095 *6 * DESCRIPTION7 * Test if FUTEX_WAIT op returns -EWOULDBLOCK if the futex value differs8 * from the expected one.9 *10 * AUTHOR11 * Gowrishankar <gowrishankar.m@in.ibm.com>12 *13 * HISTORY14 * 2009-Nov-14: Initial version by Gowrishankar <gowrishankar.m@in.ibm.com>15 *16 *****************************************************************************/17 18#include <errno.h>19#include <getopt.h>20#include <stdio.h>21#include <stdlib.h>22#include <string.h>23#include <time.h>24#include "futextest.h"25#include "futex2test.h"26#include "logging.h"27 28#define TEST_NAME "futex-wait-wouldblock"29#define timeout_ns 10000030 31void usage(char *prog)32{33 printf("Usage: %s\n", prog);34 printf(" -c Use color\n");35 printf(" -h Display this help message\n");36 printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",37 VQUIET, VCRITICAL, VINFO);38}39 40int main(int argc, char *argv[])41{42 struct timespec to = {.tv_sec = 0, .tv_nsec = timeout_ns};43 futex_t f1 = FUTEX_INITIALIZER;44 int res, ret = RET_PASS;45 int c;46 struct futex_waitv waitv = {47 .uaddr = (uintptr_t)&f1,48 .val = f1+1,49 .flags = FUTEX_32,50 .__reserved = 051 };52 53 while ((c = getopt(argc, argv, "cht:v:")) != -1) {54 switch (c) {55 case 'c':56 log_color(1);57 break;58 case 'h':59 usage(basename(argv[0]));60 exit(0);61 case 'v':62 log_verbosity(atoi(optarg));63 break;64 default:65 usage(basename(argv[0]));66 exit(1);67 }68 }69 70 ksft_print_header();71 ksft_set_plan(2);72 ksft_print_msg("%s: Test the unexpected futex value in FUTEX_WAIT\n",73 basename(argv[0]));74 75 info("Calling futex_wait on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);76 res = futex_wait(&f1, f1+1, &to, FUTEX_PRIVATE_FLAG);77 if (!res || errno != EWOULDBLOCK) {78 ksft_test_result_fail("futex_wait returned: %d %s\n",79 res ? errno : res,80 res ? strerror(errno) : "");81 ret = RET_FAIL;82 } else {83 ksft_test_result_pass("futex_wait\n");84 }85 86 if (clock_gettime(CLOCK_MONOTONIC, &to)) {87 error("clock_gettime failed\n", errno);88 return errno;89 }90 91 to.tv_nsec += timeout_ns;92 93 if (to.tv_nsec >= 1000000000) {94 to.tv_sec++;95 to.tv_nsec -= 1000000000;96 }97 98 info("Calling futex_waitv on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);99 res = futex_waitv(&waitv, 1, 0, &to, CLOCK_MONOTONIC);100 if (!res || errno != EWOULDBLOCK) {101 ksft_test_result_pass("futex_waitv returned: %d %s\n",102 res ? errno : res,103 res ? strerror(errno) : "");104 ret = RET_FAIL;105 } else {106 ksft_test_result_pass("futex_waitv\n");107 }108 109 ksft_print_cnts();110 return ret;111}112