commit f4e3ff6619f34c1b9f1f71fb4050e6bea9f65ead
author Christopher Ferris <cferris@google.com> Tue Apr 03 16:03:28 2018 -0700
committer Christopher Ferris <cferris@google.com> Wed Apr 04 12:29:25 2018 -0700
tree 15366ea92ba923c339907e19f6b13c3de508200e
parent 0a5bc29353e17fd0c2561c6dceccaf9787e10e61

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)

libbacktrace/UnwindStackMap.h

diff --git a/libbacktrace/UnwindStackMap.h b/libbacktrace/UnwindStackMap.h
index ec0d9c1..039f4a2 100644
--- a/libbacktrace/UnwindStackMap.h
+++ b/libbacktrace/UnwindStackMap.h
@@ -79,6 +79,9 @@
   bool Build(const std::vector<backtrace_map_t>& maps);
 
   bool CreateProcessMemory(const backtrace_stackinfo_t& stack);
+
+ private:
+  unwindstack::MemoryOfflineBuffer* memory_ = nullptr;
 };
 
 #endif  // _LIBBACKTRACE_UNWINDSTACK_MAP_H