tree a13b065f0515f12a21a9567eedc406670cb6e133
parent 961e3d3282a722a5aede3ee874edf10adec56249
author Stephen Nusko <nuskos@google.com> 1605726256 -0500
committer Stephen Nusko <nuskos@google.com> 1605726256 -0500

Prevent traced from blocking on a unresponsive producer.


Previously traced would block indefinitely if a producer
stop draining the IPC channel. This would result in eventually
the sendmsg call blocking and android's Watchdog killing traced
for being unresponsive, if some producer in a long trace was
unresponsive.

We add an integration test which exposed this issue to prevent
regressions, and set a timeout on the producer sockets and disconnect
the producer on timeouts.

We don't set the timeout on the consumer socket on the assumption
that the consumer is trusted and to minimize changes to our
behaviour as S is finalizing.

Bug: 169051440
Change-Id: I63988f79b63977ae27eedd126a2bbdcaaa520e78