diff --git a/lualib-src/lua-skynet.c b/lualib-src/lua-skynet.c
index eaf97b52..4999b5db 100644
--- a/lualib-src/lua-skynet.c
+++ b/lualib-src/lua-skynet.c
@@ -129,7 +129,7 @@ _callback(lua_State *L) {
 
 	lua_createtable(L,0,1);
 	lua_pushcfunction(L, _delete_stat);
-	lua_setfield(L,-1,"__gc");
+	lua_setfield(L,-2,"__gc");
 	lua_setmetatable(L, -2);
 
 	lua_rawsetp(L, LUA_REGISTRYINDEX, _stat);
diff --git a/lualib/skynet.lua b/lualib/skynet.lua
index f4467033..13ffea96 100644
--- a/lualib/skynet.lua
+++ b/lualib/skynet.lua
@@ -483,8 +483,11 @@ local function init_template(start)
     init_all()
 end
 
+local trace_handle
+
 function skynet.start(start_func)
 	c.callback(dispatch_message)
+	trace_handle = assert(c.stat "trace")
 	skynet.timeout(0, function()
         init_template(start_func)
 		skynet.send(".launcher","text", "")
@@ -495,10 +498,31 @@ function skynet.filter(f ,start_func)
 	c.callback(function(...)
 		dispatch_message(f(...))
 	end)
+	trace_handle = assert(c.stat "trace")
 	skynet.timeout(0, function()
         init_template(start_func)
 		skynet.send(".launcher","text", "")
 	end)
 end
 
+function skynet.trace_new()
+	return c.trace_new(trace_handle)
+end
+
+function skynet.trace_delete(info)
+	return c.trace_delete(info)
+end
+
+function skynet.trace_switch(session)
+	return c.trace_switch(trace_handle, session)
+end
+
+function skynet.trace_yield()
+	return c.trace_yield(trace_handle)
+end
+
+function skynet.trace_register(session)
+	return c.trace_register(trace_handle, session)
+end
+
 return skynet