diff --git a/api/api.go b/api/api.go
index b86d863d..f611d9d7 100644
--- a/api/api.go
+++ b/api/api.go
@@ -18,6 +18,12 @@ type CallContext interface {
 	SetData(interface{})
 	// Get the data field, can be used to pass information between OnEnter&OnExit
 	GetData() interface{}
+	// Get the map data field by key
+	GetKeyData(key string) interface{}
+	// Set the map data field by key
+	SetKeyData(key string, val interface{})
+	// Has the map data field by key
+	HasKeyData(key string) bool
 	// Get the original function parameter at index idx
 	GetParam(idx int) interface{}
 	// Change the original function parameter at index idx
diff --git a/tool/instrument/template.go b/tool/instrument/template.go
index a47727cf..78bf7f31 100644
--- a/tool/instrument/template.go
+++ b/tool/instrument/template.go
@@ -17,6 +17,27 @@ func (c *CallContextImpl) SetSkipCall(skip bool)    { c.SkipCall = skip }
 func (c *CallContextImpl) IsSkipCall() bool         { return c.SkipCall }
 func (c *CallContextImpl) SetData(data interface{}) { c.Data = data }
 func (c *CallContextImpl) GetData() interface{}     { return c.Data }
+func (c *CallContextImpl) GetKeyData(key string) interface{} {
+	if data == nil {
+		return nil
+	}
+	return data.(map[string]interface{})[key]
+}
+func (c *CallContextImpl) SetKeyData(key string, val interface{}) {
+	if data == nil {
+		data = make(map[string]interface{})
+	}
+	data.(map[string]interface{})[key] = val
+}
+
+func (c *CallContextImpl) HasKeyData(key string) bool {
+	if data == nil {
+		return false
+	}
+	_, ok := data.(map[string]interface{})[key]
+	return ok
+}
+
 func (c *CallContextImpl) GetParam(idx int) interface{} {
 	switch idx {
 	}