1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2015 Cyril Hrubis <chrubis@suse.cz>
4 */
5
6 #define TRESHOLD_US 100000
7 #define DEFAULT_TIMEOUT_US 100010
8
verify_futex_wait_bitset(long long wait_us,clock_t clk_id)9 static void verify_futex_wait_bitset(long long wait_us, clock_t clk_id)
10 {
11 struct timespec start, to, end;
12 futex_t futex = FUTEX_INITIALIZER;
13 u_int32_t bitset = 0xffffffff;
14 int flags = clk_id == CLOCK_REALTIME ? FUTEX_CLOCK_REALTIME : 0;
15
16 tst_res(TINFO, "testing futex_wait_bitset() timeout with %s",
17 clk_id == CLOCK_REALTIME ? "CLOCK_REALTIME" : "CLOCK_MONOTONIC");
18
19 clock_gettime(clk_id, &start);
20 to = tst_timespec_add_us(start, wait_us);
21
22 TEST(futex_wait_bitset(&futex, futex, &to, bitset, flags));
23
24 clock_gettime(clk_id, &end);
25
26 if (TST_RET != -1) {
27 tst_res(TFAIL, "futex_wait_bitset() returned %li, expected -1",
28 TST_RET);
29 return;
30 }
31
32 if (TST_ERR == ENOSYS) {
33 tst_res(TCONF,
34 "In this kernel, futex() does not support FUTEX_WAIT_BITSET operation");
35 return;
36 }
37
38 if (TST_ERR != ETIMEDOUT) {
39 tst_res(TFAIL | TTERRNO, "expected %s",
40 tst_strerrno(ETIMEDOUT));
41 return;
42 }
43
44 if (tst_timespec_lt(end, to)) {
45 tst_res(TFAIL,
46 "futex_wait_bitset() woken up prematurely %llius, expected %llius",
47 tst_timespec_diff_us(end, start), wait_us);
48 return;
49 }
50
51 if (tst_timespec_diff_us(end, to) > TRESHOLD_US) {
52 tst_res(TFAIL,
53 "futex_wait_bitset() waited too long %llius, expected %llius",
54 tst_timespec_diff_us(end, start), wait_us);
55 return;
56 }
57
58 tst_res(TPASS, "futex_wait_bitset() waited %llius, expected %llius",
59 tst_timespec_diff_us(end, start), wait_us);
60 }
61
setup(void)62 static void setup(void)
63 {
64 tst_timer_check(USE_CLOCK);
65 }
66
run(void)67 static void run(void)
68 {
69 verify_futex_wait_bitset(DEFAULT_TIMEOUT_US, USE_CLOCK);
70 }
71
72 static struct tst_test test = {
73 .setup = setup,
74 .test_all = run,
75 };
76