tree 29c18a6c1cf5e761a0ec45616e0204a2f2ffa3d6
parent b58c9fa94cd59bf492e0bfd364e3f1dafc134b2f
author Yabin Cui <yabinc@google.com> 1517609920 -0800
committer Yabin Cui <yabinc@google.com> 1517876006 -0800

simpleperf: add debug-unwind cmd.

Currently, we use --log debug option in record cmd to debug offline unwinding.
However, it has below disadvantages:
1. It adds extra complexity in record cmd.
2. It doesn't keep reg/stack data of samples.
3. It isn't convenient to reproduce samples in problem. Because each time
   recording gets different samples.
4. It isn't very suitable for performance test of unwinding, for the same
   reason as item 3.

So instead, this CL adds debug-unwind cmd focusing on debugging and testing
offline unwinding. It solves problems mentioned above.

Also change unwinding_result_reporter.py to make it work with perf.data
generated by debug-unwind cmd.

Bug: http://b/72556486
Test: run simpleperf_unit_test.
Test: run unwinding_result_reporter.py manually.
Change-Id: I11cdf1eba993f48d61ef9891ad1be54d29679fdb