diff --git a/README.md b/README.md
index 1d80f818340fc067be33f5d269071efd990edd83..563f5d4fc2dfef6e0489cb75aba6406a714b7e84 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@
 基于`cpp-stub`的功能扩展模块，提供更加丰富，方便的功能。
 更加高效地在单元测试中打桩。
 
+基于`Linux` 系统与 `gcc/g++`编译器开发（其他平台与编译器未做测试）
+
 # 安装教程
 1.  在[Github](https://github.com/coolxv/cpp-stub)或者[Gitee](https://gitee.com/coolxv/cpp-stub)下载`cpp-stub`；
 2.  将`cpp-stub-ext`与`cpp-stub`一起导入工程；
@@ -11,6 +13,8 @@
 
 # 特性
 - 支持使用`lamda`函数打桩
+- 便捷地获取虚函数地址
+1. 支持`gcc/g++`
 - 更多特性开发中...
 
 # 使用说明
@@ -76,7 +80,7 @@ class Test
 {
 public:
     int test(){return m;}
-    int ret_test(int a){return m + a;}
+    int ret_test(int a) const {return m + a;}
     int add_test(int a ,int b) {return m + a + b;}
 private:
     int m = 1;
@@ -106,7 +110,7 @@ class Test
 {
 public:
     int test(){return m;}
-    int ret_test(int a){return m + a;}
+    int ret_test(int a) const {return m + a;}
     int add_test(int a ,int b) {return m + a + b;}
 private:
     int m = 1;
@@ -173,6 +177,45 @@ int main(int argc, char *argv[])
     return 0;
 }
 ```
+## 虚函数地址
+使用`VDDR()`便捷地获取虚函数地址。
+由于功能实现采用的`gcc/g++`的转换方法，目前应该只支持`gcc/g++`编译器
+### 示例
+```c++
+#include "stubext.h"
+using namespace stub_ext;
+
+class Test
+{
+public:
+    virtual int test() {return 0;}
+};
+class TestB : public Test
+{
+public:
+    virtual int test() {return 1;}
+};
+static int foo_stub()
+{
+	return 9;
+}
+
+int main(int argc, char *argv[])
+{
+    int dd = -1;
+    StubExt st;
+    st.set_lamda(VADDR(Test,test),[&dd](){dd = 5; return dd;});
+    st.set(VADDR(TestB,test),&foo_stub);
+    
+    Test *t1 = new Test;
+    Test *t2 = new TestB;
+    int r1 = t1->test();
+    int r2 = t2->test();
+    delete t1;
+    delete t2;
+    return 0;
+}
+```
 # 参与贡献
 1.  Fork 本仓库
 2.  新建 Feat_xxx 分支
diff --git a/stub-ext/stub-shadow.h b/stub-ext/stub-shadow.h
index 063ab890c277eff7be5404f577e6346c2ab7cdc3..f2fa03a38732c5014feaebfca6f8a9ff0c07f73d 100644
--- a/stub-ext/stub-shadow.h
+++ b/stub-ext/stub-shadow.h
@@ -50,6 +50,23 @@ public:
     Lamda _func;
 };
 
+template <typename Func>
+struct VFLocator
+{
+
+};
+
+template <class Obj, typename Ret, typename... Args>
+struct VFLocator<Ret (Obj::*)(Args...)>
+{
+    typedef Ret (*Func)(Obj*, Args...);
+};
+
+template <class Obj, typename Ret, typename... Args>
+struct VFLocator<Ret (Obj::*)(Args...) const>
+{
+    typedef Ret (*Func)(Obj*, Args...);
+};
 
 template <typename Func>
 struct LamdaCaller
@@ -119,6 +136,7 @@ struct FuncShadow<Ret (Obj::*)(Args...), Lamda>
     }
 };
 
+
 template<typename Ret, class Obj,typename... Args, class Lamda>
 struct FuncShadow<Ret (Obj::*)(Args...) const, Lamda>
 {
diff --git a/stub-ext/stubext.h b/stub-ext/stubext.h
index 808c6a8621d40c12c5fafe7dd5427e0fe7d49b7e..d4fae6f99041670578ed4d9ab497e6049debec01 100644
--- a/stub-ext/stubext.h
+++ b/stub-ext/stubext.h
@@ -33,6 +33,8 @@
 #include "stub-shadow.h"
 namespace stub_ext {
 
+#define VADDR(CLASS_NAME,MEMBER_NAME) (typename VFLocator<decltype(&CLASS_NAME::MEMBER_NAME)>::Func)(&CLASS_NAME::MEMBER_NAME)
+
 class StubExt : public Stub
 {
 public: