1 files changed, 27 insertions, 0 deletions
diff --git a/lldb/source/Target/Thread.cpp b/lldb/source/Target/Thread.cpp
index 288694bfffd..b1a3c15b6b3 100644
--- a/lldb/source/Target/Thread.cpp
+++ b/lldb/source/Target/Thread.cpp
@@ -1156,7 +1156,34 @@ Thread::GetStackFrameStatus (Stream& strm,
                                           source_lines_after);
 }
 
+bool
+Thread::SaveFrameZeroState (RegisterCheckpoint &checkpoint)
+{
+    lldb::StackFrameSP frame_sp(GetStackFrameAtIndex (0));
+    if (frame_sp)
+    {
+        checkpoint.SetStackID(frame_sp->GetStackID());
+        return frame_sp->GetRegisterContext()->ReadAllRegisterValues (checkpoint.GetData());
+    }
+    return false;
+}
+
+bool
+Thread::RestoreSaveFrameZero (const RegisterCheckpoint &checkpoint)
+{
+    lldb::StackFrameSP frame_sp(GetStackFrameAtIndex (0));
+    if (frame_sp)
+    {
+        bool ret = frame_sp->GetRegisterContext()->WriteAllRegisterValues (checkpoint.GetData());
+
+        // Clear out all stack frames as our world just changed.
+        ClearStackFrames();
+        frame_sp->GetRegisterContext()->InvalidateIfNeeded(true);
 
+        return ret;
+    }
+    return false;
+}
 
 #pragma mark "Thread::SettingsController"
 //--------------------------------------------------------------