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

1 files changed, 2 insertions, 0 deletions

diff --git a/simpleperf/command.cpp b/simpleperf/command.cpp
index 0d071ab4..3d6c2d2c 100644
--- a/simpleperf/command.cpp
+++ b/simpleperf/command.cpp
@@ -79,6 +79,7 @@ extern void RegisterRecordCommand();
 extern void RegisterReportCommand();
 extern void RegisterReportSampleCommand();
 extern void RegisterStatCommand();
+extern void RegisterDebugUnwindCommand();
 
 class CommandRegister {
  public:
@@ -92,6 +93,7 @@ class CommandRegister {
     RegisterListCommand();
     RegisterRecordCommand();
     RegisterStatCommand();
+    RegisterDebugUnwindCommand();
 #endif
   }
 };