// SPDX-License-Identifier: GPL-2.0-or-later
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/******************************************************************************
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*
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* Copyright © International Business Machines Corp., 2009
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*
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* DESCRIPTION
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* Test if FUTEX_WAIT op returns -EWOULDBLOCK if the futex value differs
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* from the expected one.
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*
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* AUTHOR
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* Gowrishankar <gowrishankar.m@in.ibm.com>
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*
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* HISTORY
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* 2009-Nov-14: Initial version by Gowrishankar <gowrishankar.m@in.ibm.com>
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*
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*****************************************************************************/
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#include <errno.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "futextest.h"
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#include "logging.h"
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#define TEST_NAME "futex-wait-wouldblock"
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#define timeout_ns 100000
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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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int main(int argc, char *argv[])
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{
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struct timespec to = {.tv_sec = 0, .tv_nsec = timeout_ns};
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futex_t f1 = FUTEX_INITIALIZER;
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int res, ret = RET_PASS;
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int c;
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while ((c = getopt(argc, argv, "cht:v:")) != -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_set_plan(1);
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ksft_print_msg("%s: Test the unexpected futex value in FUTEX_WAIT\n",
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basename(argv[0]));
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info("Calling futex_wait on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
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res = futex_wait(&f1, f1+1, &to, FUTEX_PRIVATE_FLAG);
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if (!res || errno != EWOULDBLOCK) {
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fail("futex_wait returned: %d %s\n",
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res ? errno : res, res ? strerror(errno) : "");
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ret = RET_FAIL;
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}
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print_result(TEST_NAME, ret);
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return ret;
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}
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