tree e5f7ac0da39234bcfe84371196dc89dffb3b43de
parent 94d8f4e9c8c8757aa7ab7c1a7c3e9afb34039127
author Julio Merino <jmmv@google.com> 1488898653 +0000
committer Vladimir Moskva <vladmos@google.com> 1488900400 +0000

Initialize the mutex in JNIEventsDiffAwareness 

pthread mutexes must be initialized with pthread_mutex_init and cleaned
up with pthread_mutex_destroy.

This seems to fix a race where poll() would access invalid array indexes
on an array constructed based on the size of a shared list protected by
the mutex.  This is understandable because the mutex may not have been
doing anything due to the lack of its proper initialization -- and, if
so, I'm surprised the consequences were not more catastrophic.

As with any race condition, it is hard to confirm that this fixes the
observed problem, but I could trivially reproduce this issue earlier
and now I cannot with this fix after tens of runs.  See reproduction
code in the referenced bug for details on how to expose the issue.

Fixes #1676.

--
Change-Id: Ia5a4a8f12da7c3780f33266b9922eeba7645b3a4
Reviewed-on: https://cr.bazel.build/9230
PiperOrigin-RevId: 149414125
MOS_MIGRATED_REVID=149414125