mirror of https://gitee.com/openkylin/linux.git
145 lines
3.0 KiB
C
145 lines
3.0 KiB
C
/* Time bounds setting test
|
|
* by: john stultz (johnstul@us.ibm.com)
|
|
* (C) Copyright IBM 2012
|
|
* Licensed under the GPLv2
|
|
*
|
|
* NOTE: This is a meta-test which sets the time to edge cases then
|
|
* uses other tests to detect problems. Thus this test requires that
|
|
* the inconsistency-check and nanosleep tests be present in the same
|
|
* directory it is run from.
|
|
*
|
|
* To build:
|
|
* $ gcc set-2038.c -o set-2038 -lrt
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <time.h>
|
|
#include <sys/time.h>
|
|
#ifdef KTEST
|
|
#include "../kselftest.h"
|
|
#else
|
|
static inline int ksft_exit_pass(void)
|
|
{
|
|
exit(0);
|
|
}
|
|
static inline int ksft_exit_fail(void)
|
|
{
|
|
exit(1);
|
|
}
|
|
#endif
|
|
|
|
#define NSEC_PER_SEC 1000000000LL
|
|
|
|
#define KTIME_MAX ((long long)~((unsigned long long)1 << 63))
|
|
#define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
|
|
|
|
#define YEAR_1901 (-0x7fffffffL)
|
|
#define YEAR_1970 1
|
|
#define YEAR_2038 0x7fffffffL /*overflows 32bit time_t */
|
|
#define YEAR_2262 KTIME_SEC_MAX /*overflows 64bit ktime_t */
|
|
#define YEAR_MAX ((long long)((1ULL<<63)-1)) /*overflows 64bit time_t */
|
|
|
|
int is32bits(void)
|
|
{
|
|
return (sizeof(long) == 4);
|
|
}
|
|
|
|
int settime(long long time)
|
|
{
|
|
struct timeval now;
|
|
int ret;
|
|
|
|
now.tv_sec = (time_t)time;
|
|
now.tv_usec = 0;
|
|
|
|
ret = settimeofday(&now, NULL);
|
|
|
|
printf("Setting time to 0x%lx: %d\n", (long)time, ret);
|
|
return ret;
|
|
}
|
|
|
|
int do_tests(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = system("date");
|
|
ret = system("./inconsistency-check -c 0 -t 20");
|
|
ret |= system("./nanosleep");
|
|
ret |= system("./nsleep-lat");
|
|
return ret;
|
|
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
int ret = 0;
|
|
int opt, dangerous = 0;
|
|
time_t start;
|
|
|
|
/* Process arguments */
|
|
while ((opt = getopt(argc, argv, "d")) != -1) {
|
|
switch (opt) {
|
|
case 'd':
|
|
dangerous = 1;
|
|
}
|
|
}
|
|
|
|
start = time(0);
|
|
|
|
/* First test that crazy values don't work */
|
|
if (!settime(YEAR_1901)) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
if (!settime(YEAR_MAX)) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
if (!is32bits() && !settime(YEAR_2262)) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/* Now test behavior near edges */
|
|
settime(YEAR_1970);
|
|
ret = do_tests();
|
|
if (ret)
|
|
goto out;
|
|
|
|
settime(YEAR_2038 - 600);
|
|
ret = do_tests();
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* The rest of the tests can blowup on 32bit systems */
|
|
if (is32bits() && !dangerous)
|
|
goto out;
|
|
/* Test rollover behavior 32bit edge */
|
|
settime(YEAR_2038 - 10);
|
|
ret = do_tests();
|
|
if (ret)
|
|
goto out;
|
|
|
|
settime(YEAR_2262 - 600);
|
|
ret = do_tests();
|
|
|
|
out:
|
|
/* restore clock */
|
|
settime(start);
|
|
if (ret)
|
|
return ksft_exit_fail();
|
|
return ksft_exit_pass();
|
|
}
|