121 lines
3.0 KiB
C
121 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2001
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* 03/2001 - Written by Wayne Boyer
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* Copyright (c) 2022 SUSE LLC Avinesh Kumar <avinesh.kumar@suse.com>
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*/
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/*\
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* [Description]
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*
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* Check that a correct call to getitimer() succeeds.
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*/
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#include "tst_test.h"
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#include "tst_safe_clocks.h"
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#define SEC 100
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#define USEC 10000
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static struct timeval tv;
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static struct itimerval *value;
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static long jiffy;
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static struct tcase {
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int which;
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char *des;
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} tcases[] = {
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{ITIMER_REAL, "ITIMER_REAL"},
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{ITIMER_VIRTUAL, "ITIMER_VIRTUAL"},
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{ITIMER_PROF, "ITIMER_PROF"},
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};
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static void set_setitimer_value(int sec, int usec)
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{
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value->it_value.tv_sec = sec;
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value->it_value.tv_usec = usec;
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value->it_interval.tv_sec = sec;
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value->it_interval.tv_usec = usec;
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}
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static void verify_getitimer(unsigned int i)
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{
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struct tcase *tc = &tcases[i];
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tst_res(TINFO, "tc->which = %s", tc->des);
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if (tc->which == ITIMER_REAL) {
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if (gettimeofday(&tv, NULL) == -1)
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tst_brk(TBROK | TERRNO, "gettimeofday(&tv1, NULL) failed");
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else
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tst_res(TINFO, "Test begin time: %ld.%lds", tv.tv_sec, tv.tv_usec);
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}
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TST_EXP_PASS(getitimer(tc->which, value));
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TST_EXP_EQ_LI(value->it_value.tv_sec, 0);
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TST_EXP_EQ_LI(value->it_value.tv_usec, 0);
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TST_EXP_EQ_LI(value->it_interval.tv_sec, 0);
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TST_EXP_EQ_LI(value->it_interval.tv_usec, 0);
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set_setitimer_value(SEC, USEC);
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TST_EXP_PASS(setitimer(tc->which, value, NULL));
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set_setitimer_value(0, 0);
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TST_EXP_PASS(getitimer(tc->which, value));
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TST_EXP_EQ_LI(value->it_interval.tv_sec, SEC);
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TST_EXP_EQ_LI(value->it_interval.tv_usec, USEC);
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tst_res(TINFO, "value->it_value.tv_sec=%ld, value->it_value.tv_usec=%ld",
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value->it_value.tv_sec, value->it_value.tv_usec);
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/*
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* ITIMER_VIRTUAL and ITIMER_PROF timers always expire a
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* TICK_NSEC (jiffy) afterward the elapsed time to make
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* sure that at least time counters take effect.
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*/
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long margin = (tc->which == ITIMER_REAL) ? 0 : jiffy;
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if (value->it_value.tv_sec == SEC) {
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if (value->it_value.tv_usec < 0 ||
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value->it_value.tv_usec > USEC + margin)
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tst_brk(TFAIL, "value->it_value.tv_usec is out of range: %ld",
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value->it_value.tv_usec);
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} else {
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if (value->it_value.tv_sec < 0 ||
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value->it_value.tv_sec > SEC)
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tst_brk(TFAIL, "value->it_value.tv_sec is out of range: %ld",
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value->it_value.tv_sec);
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}
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tst_res(TPASS, "timer value is within the expected range");
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if (tc->which == ITIMER_REAL) {
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if (gettimeofday(&tv, NULL) == -1)
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tst_brk(TBROK | TERRNO, "gettimeofday(&tv1, NULL) failed");
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else
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tst_res(TINFO, "Test end time: %ld.%lds", tv.tv_sec, tv.tv_usec);
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}
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set_setitimer_value(0, 0);
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TST_EXP_PASS_SILENT(setitimer(tc->which, value, NULL));
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}
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static void setup(void)
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{
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struct timespec time_res;
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SAFE_CLOCK_GETRES(CLOCK_MONOTONIC_COARSE, &time_res);
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jiffy = (time_res.tv_nsec + 999) / 1000;
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tcases),
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.setup = setup,
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.test = verify_getitimer,
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.bufs = (struct tst_buffers[]) {
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{&value, .size = sizeof(struct itimerval)},
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{}
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}
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};
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