diff --git a/.gitignore b/.gitignore
index 026ea24..9baa34a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,4 +34,5 @@ vs_qrcode.png
 wintun/
 wintun.dll
 *.aar
-*.jar
\ No newline at end of file
+*.jar
+*.pprof
\ No newline at end of file
diff --git a/cmd/verysimple/main.go b/cmd/verysimple/main.go
index 5f15297..a094fe2 100644
--- a/cmd/verysimple/main.go
+++ b/cmd/verysimple/main.go
@@ -332,6 +332,7 @@ func stopMachineAndExit(m *machine.M) {
 
 }
 
+// print close info and call stopMachineAndExit
 func exitBySignal() {
 	utils.Info("Program got close signal.")