tree 29b2b4c79cb6886aef4ed80896db0e8b4b980834
parent 5f7314b7e1ee607a0aa703dcf3f8febd9123611c
author Tom Cherry <tomcherry@google.com> 1559063984 -0700
committer Tom Cherry <tomcherry@google.com> 1559145509 -0700

init: dump stack when aborting

Dump init stacks when aborting either due to LOG(FATAL) or in
userdebug/eng builds due to signals, including signals from
sanitizers.

Doesn't work for static first stage init yet, b/133450393 tracks
that.

Also, ensure that LOG(FATAL) in child processes calls abort() in all
stages of init, not just 2nd stage init.

Bug: 131747478
Test: abort init in various ways and see stacks
Test: hang or crash in backtrace handler and see child reboot
Change-Id: Ib53b5d3e7e814244203f875de016ada9900dfce8