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 32 TEST(futex_wait_wouldblock) 33 { 34 struct timespec to = {.tv_sec = 0, .tv_nsec = timeout_ns}; 35 futex_t f1 = FUTEX_INITIALIZER; 36 int res; 37 38 TH_LOG("Calling futex_wait on f1: %u @ %p with val=%u", f1, &f1, f1+1); 39 res = futex_wait(&f1, f1+1, &to, FUTEX_PRIVATE_FLAG); 40 EXPECT_EQ(res, -1) 41 TH_LOG("futex_wait returned unexpected result: %d", res); 42 if (res == -1) { 43 EXPECT_EQ(errno, EWOULDBLOCK) 44 TH_LOG("futex_wait returned unexpected errno: %d", errno); 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 (!is_futex_waitv_supported()) 61 SKIP(return, "futex_waitv syscall not supported"); 62 63 ASSERT_EQ(clock_gettime(CLOCK_MONOTONIC, &to), 0) 64 TH_LOG("clock_gettime failed"); 65 66 to.tv_nsec += timeout_ns; 67 68 if (to.tv_nsec >= 1000000000) { 69 to.tv_sec++; 70 to.tv_nsec -= 1000000000; 71 } 72 73 TH_LOG("Calling futex_waitv on f1: %u @ %p with val=%u", f1, &f1, f1+1); 74 res = futex_waitv(&waitv, 1, 0, &to, CLOCK_MONOTONIC); 75 EXPECT_EQ(res, -1) 76 TH_LOG("futex_waitv returned unexpected result: %d", res); 77 if (res == -1) { 78 EXPECT_EQ(errno, EWOULDBLOCK) 79 TH_LOG("futex_waitv returned unexpected errno: %d", errno); 80 } 81 } 82 83 TEST_HARNESS_MAIN 84