c语言 localtime_r() 返回的时间不正确。

        if(time(&currentSecs) == (time_t)-1) {
            return;
        }
        if(localtime_r(&currentSecs, &currentTime) == NULL) {
            return;
        }

在GDB中为
(gdb) p currentTime
$16 = {tm_sec = 54, tm_min = 6, tm_hour = 16, tm_mday = 4, tm_mon = 7, tm_year = 121, tm_wday = 3, tm_yday = 215, tm_isdst = 0, tm_gmtoff = 0, tm_zone = 0x4280e20 "UTC"}

但是实际时间为
root@abc:/# date -R
Thu, 05 Aug 2021 00:00:56 +0800

这是为什么啊，请专家说说