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 31 TEST(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 48 TEST(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 81 TEST_HARNESS_MAIN 82