commit e39c7656521940ec3985571523aaa725d2cdafcf
author Jiyong Park <jiyong@google.com> Fri Sep 02 16:45:57 2022 +0900
committer Jiyong Park <jiyong@google.com> Fri Sep 02 16:51:53 2022 +0900
tree cce80f2fd036eb1e5afd9d515a8f41e90642ddea
parent 21c2cfcd356df2486889fe77ec5c411bb5555fbc

Don't print output on the binder thread

So far, the vm tool has been printing the output from the VM on the
binder thread executing the callback. This prevented it from receiving
other callback events from the virtualization service before the console
output is closed.

Fixing this by spawning a new thread and outputting there.

Bug: N/A
Test: run microdroid using the vm tool, do a force crash using `echo c >
/proc/sysrq-trigger`. The `vm` tool exits in a finite amount of time.
(previously it kept saying "error reading from virtual machine:
Connection reset by peer (os error 104)")

Change-Id: I043fd051198f1a923f98b868cd7d3480c21677ee