tree 613818ffe74f64a3b017ae7c811451e67fce83a0
parent 6eed2e505e8c939e01ea139e20bf7f587d564516
author Christopher Ferris <cferris@google.com> 1522796608 -0700
committer Christopher Ferris <cferris@google.com> 1522870165 -0700

Add a MemoryOfflineBuffer object.

Use this for offline stack data so that it's not necessary to
copy any data around.

Add unit tests for the new object.

Bug: 77258731
Bug: 74354410

Test: Ran libunwindstack/libbacktrace unit tests.
Change-Id: I9b0f25d9520c96e64aedef5f295423c60ddb3488
(cherry picked from commit 6633b0ca090dd3da45b8936d587a1316401e46ba)