misc/49342: [test] lib/libc/gen/t_time.c is non-deterministic; compares set time vs current time (and can vary by a second under rare circumstances)

[yaneurabeya%gmail.com@localhost]

>Number:         49342
>Category:       misc
>Synopsis:       [test] lib/libc/gen/t_time.c is non-deterministic; compares set time vs current time (and can vary by a second under rare circumstances)
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    misc-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Oct 30 22:05:00 +0000 2014
>Originator:     Garrett Cooper
>Release:        n/a
>Organization:
EMC / Isilon Storage Division
>Environment:
n/a
>Description:
The lib/libc/gen/t_time:time_timeofday testcase works in most cases, but
if the clock rolls over between when time and gettimeofday are called, the value returned from time and the tv_sec value can vary between, as noted in one of our Kyua runs on FreeBSD:

Test case: lib/libc/gen/t_time:time_timeofday

    Test program: /var/crash/lib/libc/gen/t_time
    Result: failed: time(3) and gettimeofday(2) differ
    Duration: 0.093s
    Execution context

Metadata

    allowed_architectures =
    allowed_platforms =
    description = Test time(3) vs. gettimeofday(2)
    has_cleanup = false
    required_configs =
    required_files =
    required_memory = 0
    required_programs =
    required_user =
    timeout = 300

Standard output
Test case did not write anything to stdout.
Standard error

1414695298 vs. 1414695299

The testcase should have "fuzzing" built in so it allows for a maximum of 1 second difference between the two compared values.
>How-To-Repeat:

>Fix: