Don't cache the public stop reason, since it can change as plan completion gets processed.  That means GetStopReason needs to return a shared pointer, not a pointer to the thread's cached version.  Also allow the thread plans to get and set the thread private stop reason - that is usually more appropriate for the logic the thread plans need to do.

git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@116892 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Target/ThreadPlanStepOut.cpp b/source/Target/ThreadPlanStepOut.cpp
index 5d29134..b37c4a5 100644
--- a/source/Target/ThreadPlanStepOut.cpp
+++ b/source/Target/ThreadPlanStepOut.cpp
@@ -104,16 +104,16 @@
 {
     // We don't explain signals or breakpoints (breakpoints that handle stepping in or
     // out will be handled by a child plan.
-    StopInfo *stop_info = m_thread.GetStopInfo();
-    if (stop_info)
+    StopInfoSP stop_info_sp = GetPrivateStopReason();
+    if (stop_info_sp)
     {
-        StopReason reason = stop_info->GetStopReason();
+        StopReason reason = stop_info_sp->GetStopReason();
         switch (reason)
         {
         case eStopReasonBreakpoint:
         {
             // If this is OUR breakpoint, we're fine, otherwise we don't know why this happened...
-            BreakpointSiteSP site_sp (m_thread.GetProcess().GetBreakpointSiteList().FindByID (stop_info->GetValue()));
+            BreakpointSiteSP site_sp (m_thread.GetProcess().GetBreakpointSiteList().FindByID (stop_info_sp->GetValue()));
             if (site_sp && site_sp->IsBreakpointAtThisSite (m_return_bp_id))
             {
                 // If there was only one owner, then we're done.  But if we also hit some