查询句柄引用计数源码

#include "stdafx.h"
#include <iostream> 
#include <windows.h> 
using namespace std;

typedef   struct   _SYSTEM_HANDLE_STATE   { 
	DWORD   r1; 
	DWORD   GrantedAccess; 
	DWORD   HandleCount;   //   减1为句柄计数 
	DWORD   ReferenceCount;   //   减1为指针引用计数 
	DWORD   r5; 
	DWORD   r6; 
	DWORD   r7; 
	DWORD   r8; 
	DWORD   r9; 
	DWORD   r10;   
	DWORD   r11;   
	DWORD   r12;   
	DWORD   r13;   
	DWORD   r14;   
}SYSTEM_HANDLE_STATE,   *PSYSTEM_HANDLE_STATE;

typedef long(__stdcall*PNtQueryObject)(HANDLE ObjectHandle,ULONG ObjectInformationClass,PVOID ObjectInformation,ULONG ObjectInformationLength,PULONG ReturnLength);

int main(){
	PNtQueryObject NtQueryObject(reinterpret_cast<PNtQueryObject>(GetProcAddress(GetModuleHandleW(L"ntdll.dll"),"NtQueryObject")));
	SYSTEM_HANDLE_STATE name,*pname;ULONG len;
	HANDLE hEvent1=CreateEvent(NULL, TRUE, FALSE, NULL);
	BOOL bRet = NtQueryObject(hEvent1,0,&name,sizeof name,&len);
	cout<<bRet<<endl;
	wcout<<name.HandleCount<<"  "<<name.ReferenceCount<<endl;
	CloseHandle(hEvent1);
	bRet = NtQueryObject(hEvent1,0,&name,sizeof name,&len);// 0为查询对象的当前状态，包括句柄计数，引用计数等等
	printf("%I32X\n", bRet);//返回0xC0000008,在windows内核中表示无效句柄，说明已经关闭句柄了
	
	return 0;
}

 

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