tree 2e5d901771563dded16721f694530b3ddc53e8ed
parent 3607fe672a1aa0fa775df01b60d18d287e7f8686
author Yabin Cui <yabinc@google.com> 1525997952 -0700
committer Yabin Cui <yabinc@google.com> 1526331618 -0700

libprocinfo: add functions reading process map file.

Add test and benchmark.
Also switch libbacktrace, libunwindstack, libmemunreachable
to use libprocinfo for map file reading.
The benchmark shows using libprocinfo speeds up map file reading
in libbacktrace and libunwindstack 18% - 36% on walleye.

Bug: http://b/79118393
Test: run procinfo_test.
Test: run libunwindstack_test.
Test: run libbacktrace_test.
Test: run memunreachable_test.

Change-Id: Icf281c352f4103fc8d4ba6732c5c07b943330ca1