tree 2b933b06b8d6b48dd0172577e75595590c5a8f27
parent 8b32c30b92be6914da2dca23089473c4f37adfb9
author Christopher Ferris <cferris@google.com> 1430955394 -0700
committer Christopher Ferris <cferris@google.com> 1430955557 -0700

Fix small ptrace reads.

The BacktracePtrace::Read function crashes if the number of bytes to
read is less than the number of bytes needed to align the read to
a word_t boundary.

Fix this and add a test for this case.

Change-Id: I50808849ece44928f65dba1d25309e3885c829a2