Method to avoid skipping frames for local unwinds.

In cases where there might be a crash in the unwind library itself,
we need a method to avoid skipping these frames or we won't be able
to see the actual crash.

Added unit test for this behavior.

Bug: 74121887

Test: Ran unit tests on host and target.
Change-Id: I45825020c174016af39dd8ffdc67acb72a24ad4d

1 files changed, 6 insertions, 0 deletions

diff --git a/libbacktrace/include/backtrace/Backtrace.h b/libbacktrace/include/backtrace/Backtrace.h
index a0882079e..735a2f36e 100644
--- a/libbacktrace/include/backtrace/Backtrace.h
+++ b/libbacktrace/include/backtrace/Backtrace.h
@@ -204,6 +204,9 @@ class Backtrace {
 
   std::string GetErrorString(BacktraceUnwindError error);
 
+  // Set whether to skip frames in libbacktrace/libunwindstack when doing a local unwind.
+  void SetSkipFrames(bool skip_frames) { skip_frames_ = skip_frames; }
+
  protected:
   Backtrace(pid_t pid, pid_t tid, BacktraceMap* map);
 
@@ -223,6 +226,9 @@ class Backtrace {
 
   std::vector<backtrace_frame_data_t> frames_;
 
+  // Skip frames in libbacktrace/libunwindstack when doing a local unwind.
+  bool skip_frames_ = true;
+
   BacktraceUnwindError error_;
 };