C++博客-shaojingliuhttp://www.cppblog.com/shaojingliu/shaojingliuzh-cnThu, 23 Apr 2026 10:09:42 GMTThu, 23 Apr 2026 10:09:42 GMT60vtable示意图http://www.cppblog.com/shaojingliu/archive/2013/03/04/198201.htmlshaojingliushaojingliuMon, 04 Mar 2013 07:29:00 GMThttp://www.cppblog.com/shaojingliu/archive/2013/03/04/198201.htmlhttp://www.cppblog.com/shaojingliu/comments/198201.htmlhttp://www.cppblog.com/shaojingliu/archive/2013/03/04/198201.html#Feedback0http://www.cppblog.com/shaojingliu/comments/commentRss/198201.htmlhttp://www.cppblog.com/shaojingliu/services/trackbacks/198201.html

shaojingliu 2013-03-04 15:29 发表评论
]]>vtable测试http://www.cppblog.com/shaojingliu/archive/2013/03/04/198200.htmlshaojingliushaojingliuMon, 04 Mar 2013 07:03:00 GMThttp://www.cppblog.com/shaojingliu/archive/2013/03/04/198200.htmlhttp://www.cppblog.com/shaojingliu/comments/198200.htmlhttp://www.cppblog.com/shaojingliu/archive/2013/03/04/198200.html#Feedback0http://www.cppblog.com/shaojingliu/comments/commentRss/198200.htmlhttp://www.cppblog.com/shaojingliu/services/trackbacks/198200.html 1 typedef unsigned int uint;
 2 typedef void (*callPtr)();
 3 
 4 class CBaseClass
 5 {
 6 public:
 7     CBaseClass(){}
 8     ~CBaseClass(){}
 9     virtual void Print()
10     {
11         printf("Call: CBaseClass Print\n");
12     }
13 };
14 
15 class CDeriveClass: public CBaseClass
16 {
17 public:
18     CDeriveClass(){}
19     ~CDeriveClass(){}
20     virtual void Print()
21     {
22         printf("Call: CDeriveClass Print\n");
23     }
24 };
25 
26 int main()
27 {
28     // 创建对象 pDeriveA
29     CBaseClass* pDeriveA= new CDeriveClass();
30     // 获得对象A的vtable
31     uint* pVTableA= (uint*)*((uint*)pDeriveA);
32     // 取得vtable中第0个function
33     callPtr funcA= (callPtr)pVTableA[0];
34     // 调用Print
35     funcA();
36 
37     // 创建对象 pDeriveB
38     CBaseClass* pDeriveB= new CDeriveClass();
39     // 获得对象B的vtable
40     uint* pVTableB= (uint*)*((uint*)pDeriveB);
41     // 2个对象的VTable应该相等
42     printf("vtable %s\n", (pVTableA== pVTableB) ? "Equal!" : "Not Equal!");
43 
44     return 0;
45 }
46 

shaojingliu 2013-03-04 15:03 发表评论
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