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 #include "futextest.h"
25 #include "futex2test.h"
26 #include "logging.h"
27
28 #define TEST_NAME "futex-wait-wouldblock"
29 #define timeout_ns 100000
30
31 void 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
40 int 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 = 0
51 };
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
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