commit e0b37bd1861eb1cec62b0e118a2e64903c6b81a5
author Yifan Hong <elsk@google.com> Thu Sep 23 17:23:02 2021 -0700
committer Yifan Hong <elsk@google.com> Fri Sep 24 10:23:51 2021 -0700
tree 8e7ec747209e716498cf2a11053407f9b45a7329
parent f24415a9aa42e334d8d4650eaafbc89788977fab

binder: FdTrigger ensure POLLERR / POLLNVAL is checked

... by aborting if incoming events is 0, so that
it returns DEAD_OBJECT when POLLERR / POLLNVAL
is hit on one of the FDs. Otherwise, if
incoming events is 0, trigerrablePoll() may
block forever.

Also abort if poll() with infinite timeout returns 0. This
way we can remove the while loop, making the code clearer.

Also add a test on triggerablePoll.

Test: binderRpcTest
Fixes: 200999583
Change-Id: I2ae6c4ef2ee825e77e20b43e859df192238be724