tree 9a5797679ec99b4c125526ac3e05c871f4d6c930
parent af15fbf9aa6bb991a6abe8b2b72acc1a9405eff9
author Ryan Prichard <rprichard@google.com> 1523497598 -0700
committer Ryan Prichard <rprichard@google.com> 1523567726 -0700

init: use signalfd to catch SIGCHLD

Previously, if init received too many SIGCHLD signals, then the write to
signal_write_fd could fail with EAGAIN. The handler tried to log the
EAGAIN error, and init deadlocked if the interrupted init process had
already acquired a logging-related lock.

Bug: b/77867680
Test: manual
Change-Id: Ief0b5e94d8517827a5a7d03773391ba3ba9447c4