add register name to UnwindLog error message

llvm-svn: 189062

1 files changed, 2 insertions, 1 deletions

diff --git a/lldb/source/Plugins/Process/Utility/RegisterContextLLDB.cpp b/lldb/source/Plugins/Process/Utility/RegisterContextLLDB.cpp
index 1ffc30da576..0e4bca0f063 100644
--- a/lldb/source/Plugins/Process/Utility/RegisterContextLLDB.cpp
+++ b/lldb/source/Plugins/Process/Utility/RegisterContextLLDB.cpp
@@ -1101,7 +1101,8 @@ RegisterContextLLDB::SavedLocationForRegister (uint32_t lldb_regnum, lldb_privat
             const RegisterInfo *reg_info = GetRegisterInfoAtIndex(lldb_regnum);
             if (reg_info && abi->RegisterIsVolatile (reg_info))
             {
-                UnwindLogMsg ("did not supply reg location for %d because it is volatile", lldb_regnum);
+                UnwindLogMsg ("did not supply reg location for %d (%s) because it is volatile",
+                    lldb_regnum, reg_info->name ? reg_info->name : "??");
                 return UnwindLLDB::RegisterSearchResult::eRegisterIsVolatile;
             }
         }