tree be7406b5ef9a9ebbf01e74f913c79a9a4f8083a5
parent cedd3f387b49d3060a4c8cbc72c41a134638d19e
author Veerendranath Jakkam <quic_vjakkam@quicinc.com> 1586882079 +0530
committer Sunil Ravi <sunilravi@google.com> 1587012828 -0700

Synchronize on_ring_buffer_data_callback and writeRingbufferFiles

on_ring_buffer_data_callback callback is invoked on getting the
corresponding driver/firmware ringbuffer logs. This callback further
stores the ringbuffer data locally in cur_buffer. While the data is
getting updated through this callback, writeRingbufferFilesInternal
can get triggered from a different context which accesses the same buffer
-cur_buffer.
Synchronization is missing between these two contexts while accessing the
buffer and this commit attempts the same.

Bug: 153970986
Test: Manual - collect the bugreport and check the ring buffer logs.
Change-Id: Id99a517f4d72872b84b48c3df75dd29743f3e9b2