Re: [tor-bugs] #18025 [Tor]: test_util_touch_file is racy and *does* fail

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#18025: test_util_touch_file is racy and *does* fail
--------------------+------------------------------------
 Reporter:  weasel  |          Owner:  nickm
     Type:  defect  |         Status:  assigned
 Priority:  Medium  |      Milestone:  Tor: 0.2.8.x-final
Component:  Tor     |        Version:  Tor: 0.2.7.6
 Severity:  Normal  |     Resolution:
 Keywords:          |  Actual Points:
Parent ID:          |         Points:
  Sponsor:          |
--------------------+------------------------------------

Comment (by weasel):

 {{{
 <bwh> see
 https://sources.debian.net/src/linux/4.3.3-5/kernel/time/time.c/#L240
 <bwh> and that seems to end up reading cached time
 <bwh> whereas gettimeofday() goes here:
 https://sources.debian.net/src/linux/4.3.3-5/arch/x86/entry/vdso/vclock_gettime.c/#L218
 <bwh> and indeed can use the TSC or HPET to get high-res time
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18025#comment:12>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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