Keep the user data for compile units up to date since we often create lldb_private::CompileUnit objects without creating the DWARFCompileUnit objects when we do DWARF in .o files.

Now we make sure to update our DWARFCompileUnit -> lldb_private::CompileUnit user data when it isn't set to ensure quick transitions between the two.

<rdar://problem/18371367>

llvm-svn: 228264

1 files changed, 11 insertions, 2 deletions

diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
index e2aefd13fee..7ba4f52ac29 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -893,13 +893,22 @@ SymbolFileDWARF::GetDWARFCompileUnit(lldb_private::CompileUnit *comp_unit)
             // only 1 compile unit which is at offset zero in the DWARF.
             // TODO: modify to support LTO .o files where each .o file might
             // have multiple DW_TAG_compile_unit tags.
-            return info->GetCompileUnit(0).get();
+            
+            DWARFCompileUnit *dwarf_cu = info->GetCompileUnit(0).get();
+            if (dwarf_cu && dwarf_cu->GetUserData() == NULL)
+                dwarf_cu->SetUserData(comp_unit);
+            return dwarf_cu;
         }
         else
         {
             // Just a normal DWARF file whose user ID for the compile unit is
             // the DWARF offset itself
-            return info->GetCompileUnit((dw_offset_t)comp_unit->GetID()).get();
+
+            DWARFCompileUnit *dwarf_cu = info->GetCompileUnit((dw_offset_t)comp_unit->GetID()).get();
+            if (dwarf_cu && dwarf_cu->GetUserData() == NULL)
+                dwarf_cu->SetUserData(comp_unit);
+            return dwarf_cu;
+
         }
     }
     return NULL;