Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
John Stultz | 393 | 99.49% | 1 | 50.00% |
Nathan Chancellor | 2 | 0.51% | 1 | 50.00% |
Total | 395 | 2 |
/* 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> #include "../kselftest.h" #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) ksft_exit_fail(); ksft_exit_pass(); }
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