1 files changed, 8 insertions, 0 deletions

diff --git a/lstate.c b/lstate.c
index 8e7c8b86..d6b9c90f 100644
--- a/lstate.c
+++ b/lstate.c
@@ -257,6 +257,14 @@ static void preinit_thread (lua_State *L, global_State *g) {
 }
 
 
+size_t luaE_statesize (lua_State *L) {
+  size_t sz = sizeof(LG) + cast_uint(L->nci) * sizeof(CallInfo);
+  if (L->stack.p != NULL)
+    sz += cast_uint(stacksize(L) + EXTRA_STACK) * sizeof(StackValue);
+  return sz;
+}
+
+
 static void close_state (lua_State *L) {
   global_State *g = G(L);
   if (!completestate(g))  /* closing a partially built state? */