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authorLukasz Majewski <lukma@denx.de>2021-01-25 13:48:13 +0100
committerLukasz Majewski <lukma@denx.de>2021-02-16 20:41:45 +0100
commit7b15dabfdd49a2dcb6d25285f3bcdf880c1dbda5 (patch)
treea2b2f7fb3e76b2fccb1fae63d7df2f65b3879a21 /time
parent13c0b30b24b1f7c6853cb8a3317568cb960efe99 (diff)
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tst: time: Provide Y2038 tests for mktime (tst-mktime4.c)
This change adds new test to assess mktime's functionality. To be more specific - following use cases are checked: - Pass struct tm as epoch time - Pass struct tm as value just before Y2038 threshold (returned value shall be 0x7FFFFFFF) - Pass struct tm as the first value after Y2038 threshold (expected value - 0x80000000) Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'time')
-rw-r--r--time/Makefile2
-rw-r--r--time/tst-mktime4.c109
2 files changed, 110 insertions, 1 deletions
diff --git a/time/Makefile b/time/Makefile
index 7caec2b..a52b6b9 100644
--- a/time/Makefile
+++ b/time/Makefile
@@ -48,7 +48,7 @@ tests := test_time clocktest tst-posixtz tst-strptime tst_wcsftime \
tst-strptime3 bug-getdate1 tst-strptime-whitespace tst-ftime \
tst-tzname tst-y2039 bug-mktime4 tst-strftime2 tst-strftime3 \
tst-clock tst-clock2 tst-clock_nanosleep tst-cpuclock1 \
- tst-adjtime tst-ctime tst-difftime
+ tst-adjtime tst-ctime tst-difftime tst-mktime4
include ../Rules
diff --git a/time/tst-mktime4.c b/time/tst-mktime4.c
new file mode 100644
index 0000000..d3516f4
--- /dev/null
+++ b/time/tst-mktime4.c
@@ -0,0 +1,109 @@
+/* Test for mktime (4)
+ Copyright (C) 2021 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <time.h>
+#include <stdlib.h>
+#include <support/check.h>
+
+const struct tm tm0 =
+ {
+ .tm_year = 70,
+ .tm_mon = 0,
+ .tm_mday = 1,
+ .tm_hour = 0,
+ .tm_min = 0,
+ .tm_sec = 0,
+ .tm_wday = 4,
+ .tm_yday = 0,
+ };
+
+const struct tm tmY2038 =
+ {
+ .tm_year = 138,
+ .tm_mon = 0,
+ .tm_mday = 19,
+ .tm_hour = 3,
+ .tm_min = 14,
+ .tm_sec = 7,
+ };
+
+const struct tm tm32bitmax =
+ {
+ .tm_year = 206,
+ .tm_mon = 1,
+ .tm_mday = 7,
+ .tm_hour = 6,
+ .tm_min = 28,
+ .tm_sec = 15,
+ };
+
+static
+int test_mktime_helper (struct tm *tm, long long int exp_val, int line)
+{
+ time_t result, t;
+
+ /* Check if we run on port with 32 bit time_t size. */
+ if (__builtin_add_overflow (exp_val, 0, &t))
+ return 0;
+
+ result = mktime (tm);
+ if (result == (time_t) -1)
+ FAIL_RET ("*** mktime failed: %m in line: %d", line);
+
+ if ((long long int) result != exp_val)
+ FAIL_RET ("*** Result different than expected (%lld != %lld) in %d\n",
+ (long long int) result, exp_val, line);
+
+ return 0;
+}
+
+static int
+do_test (void)
+{
+ struct tm t;
+ /* Use glibc time zone extension "TZ=:" to to guarantee that UTC
+ without leap seconds is used for the test. */
+ TEST_VERIFY_EXIT (setenv ("TZ", ":", 1) == 0);
+
+ /* Check that mktime (1970-01-01 00:00:00) returns 0. */
+ t = tm0;
+ test_mktime_helper (&t, 0, __LINE__);
+
+ /* Check that mktime (2038-01-19 03:14:07) returns 0x7FFFFFFF. */
+ t = tmY2038;
+ test_mktime_helper (&t, 0x7fffffff, __LINE__);
+
+ /* Check that mktime (2038-01-19 03:14:08) returns 0x80000000
+ (time_t overflow). */
+ t = tmY2038;
+ t.tm_sec++;
+ test_mktime_helper (&t, 0x80000000, __LINE__);
+
+ /* Check that mktime (2106-02-07 06:28:15) returns 0xFFFFFFFF. */
+ t = tm32bitmax;
+ test_mktime_helper (&t, 0xFFFFFFFF, __LINE__);
+
+ /* Check that mktime (2106-02-07 06:28:16) returns 0x100000000. */
+ t = tm32bitmax;
+ t.tm_sec++;
+ test_mktime_helper (&t, 0x100000000, __LINE__);
+
+ return 0;
+}
+
+#include <support/test-driver.c>