109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2015 Cyril Hrubis <chrubis@suse.cz>
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*
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* 1. Block on a bitset futex and wait for timeout, the difference between
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* normal futex and bitset futex is that that the later have absolute timeout.
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* 2. Check that the futex waited for expected time.
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*/
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#include "tst_test.h"
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#include "tst_timer.h"
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#include "futextest.h"
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#define THRESHOLD_US 100000
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#define DEFAULT_TIMEOUT_US 100010
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static struct test_case_t {
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clockid_t clk_id;
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} tcases[] = {
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{ CLOCK_MONOTONIC },
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{ CLOCK_REALTIME }
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};
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static struct futex_test_variants variants[] = {
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#if (__NR_futex != __LTP__NR_INVALID_SYSCALL)
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{ .fntype = FUTEX_FN_FUTEX, .tstype = TST_KERN_OLD_TIMESPEC, .gettime = sys_clock_gettime, .desc = "syscall with old kernel spec"},
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#endif
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#if (__NR_futex_time64 != __LTP__NR_INVALID_SYSCALL)
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{ .fntype = FUTEX_FN_FUTEX64, .tstype = TST_KERN_TIMESPEC, .gettime = sys_clock_gettime64, .desc = "syscall time64 with kernel spec"},
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#endif
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};
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static void verify_futex_wait_bitset(long long wait_us, clock_t clk_id)
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{
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struct futex_test_variants *tv = &variants[tst_variant];
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struct tst_ts start, to, end;
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futex_t futex = FUTEX_INITIALIZER;
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u_int32_t bitset = 0xffffffff;
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int flags = clk_id == CLOCK_REALTIME ? FUTEX_CLOCK_REALTIME : 0;
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start.type = end.type = to.type = tv->tstype;
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tst_res(TINFO, "testing futex_wait_bitset() timeout with %s",
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clk_id == CLOCK_REALTIME ? "CLOCK_REALTIME" : "CLOCK_MONOTONIC");
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tv->gettime(clk_id, tst_ts_get(&start));
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to = tst_ts_add_us(start, wait_us);
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TEST(futex_wait_bitset(tv->fntype, &futex, futex, &to, bitset, flags));
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tv->gettime(clk_id, tst_ts_get(&end));
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if (TST_RET != -1) {
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tst_res(TFAIL, "futex_wait_bitset() returned %li, expected -1",
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TST_RET);
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return;
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}
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if (TST_ERR == ENOSYS) {
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tst_res(TCONF,
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"In this kernel, futex() does not support FUTEX_WAIT_BITSET operation");
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return;
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}
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if (TST_ERR != ETIMEDOUT) {
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tst_res(TFAIL | TTERRNO, "expected %s",
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tst_strerrno(ETIMEDOUT));
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return;
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}
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if (tst_ts_lt(end, to)) {
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tst_res(TFAIL,
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"futex_wait_bitset() woken up prematurely %llius, expected %llius",
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tst_ts_diff_us(end, start), wait_us);
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return;
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}
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if (tst_ts_diff_us(end, to) > THRESHOLD_US) {
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tst_res(TFAIL,
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"futex_wait_bitset() waited too long %llius, expected %llius",
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tst_ts_diff_us(end, start), wait_us);
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return;
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}
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tst_res(TPASS, "futex_wait_bitset() waited %llius, expected %llius",
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tst_ts_diff_us(end, start), wait_us);
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}
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static void run(unsigned int n)
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{
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verify_futex_wait_bitset(DEFAULT_TIMEOUT_US, tcases[n].clk_id);
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}
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static void setup(void)
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{
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struct futex_test_variants *tv = &variants[tst_variant];
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tst_res(TINFO, "Testing variant: %s", tv->desc);
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futex_supported_by_kernel(tv->fntype);
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}
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static struct tst_test test = {
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.setup = setup,
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.test = run,
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.tcnt = ARRAY_SIZE(tcases),
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.test_variants = ARRAY_SIZE(variants),
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};
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