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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | // 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 "futex2test.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; struct futex_waitv waitv = { .uaddr = (uintptr_t)&f1, .val = f1+1, .flags = FUTEX_32, .__reserved = 0 }; 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(2); 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) { ksft_test_result_fail("futex_wait returned: %d %s\n", res ? errno : res, res ? strerror(errno) : ""); ret = RET_FAIL; } else { ksft_test_result_pass("futex_wait\n"); } if (clock_gettime(CLOCK_MONOTONIC, &to)) { error("clock_gettime failed\n", errno); return errno; } to.tv_nsec += timeout_ns; if (to.tv_nsec >= 1000000000) { to.tv_sec++; to.tv_nsec -= 1000000000; } info("Calling futex_waitv on f1: %u @ %p with val=%u\n", f1, &f1, f1+1); res = futex_waitv(&waitv, 1, 0, &to, CLOCK_MONOTONIC); if (!res || errno != EWOULDBLOCK) { ksft_test_result_pass("futex_waitv returned: %d %s\n", res ? errno : res, res ? strerror(errno) : ""); ret = RET_FAIL; } else { ksft_test_result_pass("futex_waitv\n"); } ksft_print_cnts(); return ret; } |