[mirror_ubuntu-focal-kernel.git] / tools / testing / selftests / futex / functional / futex_wait_wouldblock.c

// SPDX-License-Identifier: GPL-2.0-or-later
/******************************************************************************
 *
 *   Copyright © International Business Machines  Corp., 2009
 *
 * DESCRIPTION
 *      Test if FUTEX_WAIT op returns -EWOULDBLOCK if the futex value differs
 *      from the expected one.
 *
 * AUTHOR
 *      Gowrishankar <gowrishankar.m@in.ibm.com>
 *
 * HISTORY
 *      2009-Nov-14: Initial version by Gowrishankar <gowrishankar.m@in.ibm.com>
 *
 *****************************************************************************/

#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "futextest.h"
#include "logging.h"

#define TEST_NAME "futex-wait-wouldblock"
#define timeout_ns 100000

void usage(char *prog)
{
	printf("Usage: %s\n", prog);
	printf("  -c	Use color\n");
	printf("  -h	Display this help message\n");
	printf("  -v L	Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
	       VQUIET, VCRITICAL, VINFO);
}

int main(int argc, char *argv[])
{
	struct timespec to = {.tv_sec = 0, .tv_nsec = timeout_ns};
	futex_t f1 = FUTEX_INITIALIZER;
	int res, ret = RET_PASS;
	int c;

	while ((c = getopt(argc, argv, "cht:v:")) != -1) {
		switch (c) {
		case 'c':
			log_color(1);
			break;
		case 'h':
			usage(basename(argv[0]));
			exit(0);
		case 'v':
			log_verbosity(atoi(optarg));
			break;
		default:
			usage(basename(argv[0]));
			exit(1);
		}
	}

	ksft_print_header();
	ksft_set_plan(1);
	ksft_print_msg("%s: Test the unexpected futex value in FUTEX_WAIT\n",
	       basename(argv[0]));

	info("Calling futex_wait on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
	res = futex_wait(&f1, f1+1, &to, FUTEX_PRIVATE_FLAG);
	if (!res || errno != EWOULDBLOCK) {
		fail("futex_wait returned: %d %s\n",
		     res ? errno : res, res ? strerror(errno) : "");
		ret = RET_FAIL;
	}

	print_result(TEST_NAME, ret);
	return ret;
}
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
2aa8470f DH	2	/******************************************************************************
	3	*
	4	* Copyright © International Business Machines Corp., 2009
	5	*
2aa8470f DH	6	* DESCRIPTION
	7	* Test if FUTEX_WAIT op returns -EWOULDBLOCK if the futex value differs
	8	* from the expected one.
	9	*
	10	* AUTHOR
	11	* Gowrishankar <gowrishankar.m@in.ibm.com>
	12	*
	13	* HISTORY
	14	* 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 "logging.h"
	26
1f666e52	27	#define TEST_NAME "futex-wait-wouldblock"
2aa8470f DH	28	#define timeout_ns 100000
	29
	30	void usage(char *prog)
	31	{
	32	printf("Usage: %s\n", prog);
	33	printf(" -c Use color\n");
	34	printf(" -h Display this help message\n");
	35	printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
	36	VQUIET, VCRITICAL, VINFO);
	37	}
	38
	39	int main(int argc, char *argv[])
	40	{
	41	struct timespec to = {.tv_sec = 0, .tv_nsec = timeout_ns};
	42	futex_t f1 = FUTEX_INITIALIZER;
	43	int res, ret = RET_PASS;
	44	int c;
	45
	46	while ((c = getopt(argc, argv, "cht:v:")) != -1) {
	47	switch (c) {
	48	case 'c':
	49	log_color(1);
	50	break;
	51	case 'h':
	52	usage(basename(argv[0]));
	53	exit(0);
	54	case 'v':
	55	log_verbosity(atoi(optarg));
	56	break;
	57	default:
	58	usage(basename(argv[0]));
	59	exit(1);
	60	}
	61	}
	62
b274e75c	63	ksft_print_header();
5821ba96	64	ksft_set_plan(1);
b274e75c	65	ksft_print_msg("%s: Test the unexpected futex value in FUTEX_WAIT\n",
2aa8470f DH	66	basename(argv[0]));
	67
	68	info("Calling futex_wait on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
	69	res = futex_wait(&f1, f1+1, &to, FUTEX_PRIVATE_FLAG);
	70	if (!res \|\| errno != EWOULDBLOCK) {
	71	fail("futex_wait returned: %d %s\n",
	72	res ? errno : res, res ? strerror(errno) : "");
	73	ret = RET_FAIL;
	74	}
	75
1f666e52	76	print_result(TEST_NAME, ret);
2aa8470f DH	77	return ret;
2aa8470f DH	78	}