double freeing of freed memory


最近在客户那里改用klockwork分析出的问题，遇到了这个问题：Double freeing of freed memory may be in class 'DriverInfo'. copy constructor and operator= is not defined。

自己写了个例子

#include <iostream>

class MyData

{

 public:

 MyData()

 {

  myData = new int;

  printf("Created data: 0x%08X\n", myData);

 }

 ~MyData()

 {

  printf("Destroying data: 0x%08X\n", myData);

  delete myData;

 }

 private:

 int* myData;

};

int main(int argc, char* argv[])

{

 MyData test1;

 MyData test2;

 test2 = test1;

 MyData test3(test1);

}

----------------------------------------------------------------------------------------------------------------

输出结果：

Created data: 0x00551d30

Created data: 0x00551d70

Destroying data: 0x00551D30

Destroying data: 0x00551D30

挂了。。。

这里有内存泄漏（0x00551d70）和多次释放资源。这个问题本质上应该是深拷贝和浅拷贝的问题。