tree f71813c776c516b955f4d8548fe7d9bb320f0eb8
parent ed2edc7a8e044e31a6c9db638c97f9c21fb1d946
author Jeff Sharkey <jsharkey@android.com> 1460407210 -0600
committer Jeff Sharkey <jsharkey@android.com> 1460407234 -0600

Rate-limit how often we collect wtf() logs.

We've seen that aggressive Log.wtf() calls can DoS the system
process, since we fork and collect recent logcat output for each
call.  After this CL, we rate-limit to only perform this heavy
lifting 5 times during any given 10 second window of time.

We still log the wtf() message to the binary event log.

Bug: 28117774, 28052546, 27994717, 27381069
Change-Id: Ic91b23fe7ee26818083a8d40fd4850fcb9d93643