tree 1733d9f440b2364e6a47a26ef3a59064f131ba61
parent 35eb324bf17e63a2e28c08484313d195e3f1e7f6
author Dan Sandler <dsandler@android.com> 1492129272 -0400
committer Dan Sandler <dsandler@android.com> 1493230695 -0400

Avoid ClassCastException in ArrayMap.

Only happens if you're put()ing and clear()ing the map from
different threads, and Dianne told you not to do that.

In addition to avoiding the cache poisoning that results
from concurrent access, ArrayMap now attempts to throw
ConcurrentModificationException if clear() or
ensureCapacity() or put() notices you've modified the map
elsewhere.

Bug: 32994281
Test: runtest -x frameworks/base/core/tests/coretests/src/android/util/ArrayMapTest.java
      runtest -x cts/tests/tests/util/src/android/util/cts/ArrayMapTest.java
Change-Id: Ia75970aa9e2b2b65692179f51243584b9773797f