CChild child；

CChild* pChild = &child;

const char* pname1 = typeid(child).name();

const char* pname2 = typeid(pChild).name();

 

pname1 : "class CChild"

pname2 : "class CChild*"

 

 

 

 

【干净的class，内存布局】

    COffsetTest oftest;
    COffsetTest* pclass = &oftest;
    int* px = &oftest.x;
    int* py = &oftest.y;

 

pclass = 0x0012f45c

px = 0x0012f45c

py = 0x0012f460

 

【有虚函数表且多继承的class，内存布局】

CChild child;

    CChild* pChild = &child;
    CParent* pParent1 = (CParent*)pChild;
    CParent2* pParent2 = (CParent2*)pChild;
    int *pChildX = &child.x;
    int *pParentX1 = &pParent1->param1;
    int *pParentX2 = &pParent2->param2;

 

pChild = 0x0012f5a0

pParent1 = 0x0012f5a0

pParent2 = 0x0012f5a8

pChildX = 0x0012f5b4

pParentX1 = 0x0012f5a4

pParentX2 = 0x0012f5ac

 

内存布局

[基类1虚函数表指针]

[基类1成员变量]

[基类2虚函数表指针]

[基类2成员变量]

[自身类虚函数表指针（如果有）]

[自身类成员变量]

 

【rtti信息】

存储在虚函数表的第一个位置

- pParent1 0x0012f5a0 {_fun1=0x0041173a CChild::callfunc(int) x=-858993460 } CParent *

+ [CChild] {_fun1=0x0041173a CChild::callfunc(int) x=-858993460 } CChild

- __vfptr 0x004259dc const CChild::`vftable'{for `CParent'} *
 [0] 0x004111ef CChild::`vector deleting destructor'(unsigned int) *
 [1] 0x00411d89 CParent::parent1(void) *