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Linux kernel mirror (for testing)
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1// SPDX-License-Identifier: GPL-2.0-or-later
2/******************************************************************************
3 *
4 * Copyright © International Business Machines Corp., 2009
5 *
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
25#include "futextest.h"
26#include "futex2test.h"
27#include "../../kselftest_harness.h"
28
29#define timeout_ns 100000
30
31TEST(futex_wait_wouldblock)
32{
33 struct timespec to = {.tv_sec = 0, .tv_nsec = timeout_ns};
34 futex_t f1 = FUTEX_INITIALIZER;
35 int res;
36
37 ksft_print_dbg_msg("Calling futex_wait on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
38 res = futex_wait(&f1, f1+1, &to, FUTEX_PRIVATE_FLAG);
39 if (!res || errno != EWOULDBLOCK) {
40 ksft_test_result_fail("futex_wait returned: %d %s\n",
41 res ? errno : res,
42 res ? strerror(errno) : "");
43 } else {
44 ksft_test_result_pass("futex_wait\n");
45 }
46}
47
48TEST(futex_waitv_wouldblock)
49{
50 struct timespec to = {.tv_sec = 0, .tv_nsec = timeout_ns};
51 futex_t f1 = FUTEX_INITIALIZER;
52 struct futex_waitv waitv = {
53 .uaddr = (uintptr_t)&f1,
54 .val = f1 + 1,
55 .flags = FUTEX_32,
56 .__reserved = 0,
57 };
58 int res;
59
60 if (clock_gettime(CLOCK_MONOTONIC, &to))
61 ksft_exit_fail_msg("clock_gettime failed %d\n", errno);
62
63 to.tv_nsec += timeout_ns;
64
65 if (to.tv_nsec >= 1000000000) {
66 to.tv_sec++;
67 to.tv_nsec -= 1000000000;
68 }
69
70 ksft_print_dbg_msg("Calling futex_waitv on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
71 res = futex_waitv(&waitv, 1, 0, &to, CLOCK_MONOTONIC);
72 if (!res || errno != EWOULDBLOCK) {
73 ksft_test_result_fail("futex_waitv returned: %d %s\n",
74 res ? errno : res,
75 res ? strerror(errno) : "");
76 } else {
77 ksft_test_result_pass("futex_waitv\n");
78 }
79}
80
81TEST_HARNESS_MAIN