commit c5b4a3106a0845d1bd8fd2c1b1c724eeb719ec62
author Yabin Cui <yabinc@google.com> Mon Oct 24 13:38:38 2016 -0700
committer Yabin Cui <yabinc@google.com> Mon Oct 31 10:40:03 2016 -0700
tree 8d045224b547f708cadcd4c7c23476b0a78e262e
parent d2fcab88ef855a9a415159b669f7ea7e00f5a575

simpleperf: dump file feature section.

For `record --dump-symbols` option, change from dumping
DsoRecord and SymbolRecord to dumping file feature section.
It is to avoid reading symbols from elf files during recording,
which takes a lot of time. And we don't want to mix optional
data (the symbol tables) with necessary data (the profiling records).

Bug: http://b/32340274
Test: run simpleperf_unit_test.
Test: run simpleperf runtest.py.

Change-Id: I0a387de243afac93486fc885f223a58060ec07f4