b841065043
There is no need to keep timers tests in sync with external timers repo. Drop support for !KTEST to support for building and running timers tests without kselftest framework. Reference: https://lkml.org/lkml/2017/8/10/952 Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com> Acked-by: John Stultz <john.stultz@linaro.org>
133 lines
2.9 KiB
C
133 lines
2.9 KiB
C
/* Time bounds setting test
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* by: john stultz (johnstul@us.ibm.com)
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* (C) Copyright IBM 2012
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* Licensed under the GPLv2
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*
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* NOTE: This is a meta-test which sets the time to edge cases then
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* uses other tests to detect problems. Thus this test requires that
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* the inconsistency-check and nanosleep tests be present in the same
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* directory it is run from.
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*
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* To build:
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* $ gcc set-2038.c -o set-2038 -lrt
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <time.h>
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#include <sys/time.h>
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#include "../kselftest.h"
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#define NSEC_PER_SEC 1000000000LL
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#define KTIME_MAX ((long long)~((unsigned long long)1 << 63))
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#define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
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#define YEAR_1901 (-0x7fffffffL)
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#define YEAR_1970 1
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#define YEAR_2038 0x7fffffffL /*overflows 32bit time_t */
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#define YEAR_2262 KTIME_SEC_MAX /*overflows 64bit ktime_t */
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#define YEAR_MAX ((long long)((1ULL<<63)-1)) /*overflows 64bit time_t */
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int is32bits(void)
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{
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return (sizeof(long) == 4);
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}
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int settime(long long time)
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{
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struct timeval now;
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int ret;
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now.tv_sec = (time_t)time;
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now.tv_usec = 0;
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ret = settimeofday(&now, NULL);
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printf("Setting time to 0x%lx: %d\n", (long)time, ret);
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return ret;
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}
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int do_tests(void)
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{
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int ret;
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ret = system("date");
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ret = system("./inconsistency-check -c 0 -t 20");
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ret |= system("./nanosleep");
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ret |= system("./nsleep-lat");
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return ret;
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}
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int main(int argc, char *argv[])
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{
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int ret = 0;
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int opt, dangerous = 0;
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time_t start;
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/* Process arguments */
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while ((opt = getopt(argc, argv, "d")) != -1) {
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switch (opt) {
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case 'd':
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dangerous = 1;
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}
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}
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start = time(0);
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/* First test that crazy values don't work */
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if (!settime(YEAR_1901)) {
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ret = -1;
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goto out;
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}
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if (!settime(YEAR_MAX)) {
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ret = -1;
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goto out;
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}
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if (!is32bits() && !settime(YEAR_2262)) {
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ret = -1;
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goto out;
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}
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/* Now test behavior near edges */
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settime(YEAR_1970);
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ret = do_tests();
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if (ret)
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goto out;
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settime(YEAR_2038 - 600);
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ret = do_tests();
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if (ret)
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goto out;
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/* The rest of the tests can blowup on 32bit systems */
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if (is32bits() && !dangerous)
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goto out;
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/* Test rollover behavior 32bit edge */
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settime(YEAR_2038 - 10);
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ret = do_tests();
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if (ret)
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goto out;
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settime(YEAR_2262 - 600);
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ret = do_tests();
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out:
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/* restore clock */
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settime(start);
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if (ret)
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return ksft_exit_fail();
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return ksft_exit_pass();
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}
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