tree be6afb856b4ba79b829fef11593b77973946bb76
parent 3d57dfedbefb9f4846a6bd29e6e31f3030fc5541
author Daniel Erat <derat@chromium.org> 1509676312 -0700
committer chrome-bot <chrome-bot@chromium.org> 1510105940 -0800

tast: Enforce timeouts when reading control messages.

Make the tast executable enforce timeouts when reading
control messages sent by the local_tests (or remote_tests,
although it runs on the same machine) executable.

By default, a one-minute timeout is used, but this is
lengthened based on per-test timeouts while tests are
running.

BUG=chromium:778389
TEST=added unit tests; also pulled the plug on a device
     mid-test and checked that the tast command timed out
     after two minutes

Change-Id: Ia60c06d408692e3d5f9bfabec7059002d581fdfd
Reviewed-on: https://chromium-review.googlesource.com/757163
Commit-Ready: Dan Erat <derat@chromium.org>
Tested-by: Dan Erat <derat@chromium.org>
Reviewed-by: Jason Clinton <jclinton@chromium.org>