commit f22c7efb613209efdb956035316db75df17efbd1
author Eric Aleshire <ericale@google.com> Mon Feb 04 23:41:26 2019
committer Commit Bot <commit-bot@chromium.org> Mon Feb 04 23:41:26 2019
tree f46c04bf764cb658c4e113fd92f4138afd5d41ef
parent 6d6703d2785e2725ff9c3ade731be583645b754e

Attempt to avoid timing out after successful iOS test runs by catching SIGTERM.

The test runner is sent SIGTERM typically 30s before the hard timeout
of a test run; knowing that, this CL attempts to catch that SIGTERM
and force kill a hung test process, allowing it to exit more gracefully.
(See:
https://cs.chromium.org/chromium/infra/luci/appengine/swarming/swarming_bot/bot_code/bot_main.py?l=891&rcl=599029f4b1abebfa812f3b2b9df9a5c6c7acbca4)

This should not affect the success/failure of a run, as that is
determined by "TEST EXECUTION SUCCEEDED" appearing in the stdout
for a test run. Return code is noted but not used for success.

I also add some minor logging in this CL for clarity.

Change-Id: I5ec882862db6693f09f69f6e191261f2c6ba43f9
Bug: 898549
Reviewed-on: https://chromium-review.googlesource.com/c/1448684
Commit-Queue: ericale <ericale@chromium.org>
Reviewed-by: Sergey Berezin <sergeyberezin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#628935}