tree ebd87d81e268189c860d8de5f1f11fd38dcd9e8b
parent 1776fa33f1ed0b853e3f3dde979597d1674cdf29
author Yao Chen <yaochen@google.com> 1516660612 -0800
committer Yao Chen <yaochen@google.com> 1516661077 -0800

Handle return value 0 from android_logger_list_read

This fixes the bug that sometimes statsd is running at 99% cpu.
Connection to logd can be reset for various reasons, and android_logger_list_read
will return 0 when that happens. We didn't handle 0 before, and that leads to reading
empty logs and processing them in a infinite loop.

Bug: 71833883
Test: manual test by killing logd, forcing return 0.
Change-Id: I5a9c89fc58959d6593028a14f70a8fe8d10b40f1