访问虚函数表

在x64下使用longlong类型保存虚函数指针，在x86下使用int保存指针，如果是x86，把long long vTable改成int vTable，后面的依次修改

#include <iostream>
#include <cstdio>
#include <iomanip>
#include <string>
#include <cstdlib>
#include <cstring>
#include <queue>
#include <set>
#include <vector>
#include <map>
#include <algorithm>
#include <cmath>

#define INF 0x3f3f3f3f
#define LINF 0x3f3f3f3f3f3f3f3f
#define ll long long
#define ull unsigned long long
#define uint unsigned int
#define l(x) x<<1
#define r(x) x<<1|1
#define ms(a,b) memset(a,b,sizeof(a))

using namespace std;

class A{
public:
	virtual void f() { cout << "A1::f" << endl; }
	virtual void g() { cout << "A1::g" << endl; }
	virtual void h() { cout << "A1::h" << endl; }
};

class B : public A{
public:
	virtual void f() { cout << "B::f" << endl; }
	virtual void g() { cout << "B::g" << endl; }
	virtual void h() { cout << "B::h" << endl; }
};

typedef void(*FUNC)();
void PrintVTable(A* demo)  
{
	long long *vTable = (long long *)(*(long long*)demo);
	if (vTable == NULL)
	{
		return;
	}
	cout << "vtbl:" << vTable << endl;

	int  i = 0;
	for (; vTable[i] != 0; ++i)
	{
		printf("function : %d :0X%x->", i, vTable[i]);
		FUNC f = (FUNC)vTable[i];
		f();
	}
	cout << endl;
}

int main() {
	B *b = new B();
	PrintVTable(b);

	return 0;
}