[Lldb/Lua] Persist Lua state across script interpreter calls.

Don't create a new lua state on every operation. Share a single state
across the lifetime of the script interpreter. Add simple locking to
prevent two threads from modifying the state concurrently.

1 files changed, 6 insertions, 1 deletions

diff --git a/lldb/source/Plugins/ScriptInterpreter/Lua/ScriptInterpreterLua.h b/lldb/source/Plugins/ScriptInterpreter/Lua/ScriptInterpreterLua.h
index 7f69a73..b34c7d0 100644
--- a/lldb/source/Plugins/ScriptInterpreter/Lua/ScriptInterpreterLua.h
+++ b/lldb/source/Plugins/ScriptInterpreter/Lua/ScriptInterpreterLua.h
@@ -12,7 +12,7 @@
 #include "lldb/Interpreter/ScriptInterpreter.h"
 
 namespace lldb_private {
-
+class Lua;
 class ScriptInterpreterLua : public ScriptInterpreter {
 public:
   ScriptInterpreterLua(Debugger &debugger);
@@ -40,6 +40,11 @@ public:
   lldb_private::ConstString GetPluginName() override;
 
   uint32_t GetPluginVersion() override;
+
+  Lua &GetLua();
+
+private:
+  std::unique_ptr<Lua> m_lua;
 };
 
 } // namespace lldb_private