一、非MFC程序可以用以下方法检测内存泄露：
1.程序开始包含如下定义：
#ifdef _DEBUG #define DEBUG_CLIENTBLOCK new( _CLIENT_BLOCK, __FILE__, __LINE__) #else #define DEBUG_CLIENTBLOCK #endif // _DEBUG #define _CRTDBG_MAP_ALLOC #include <stdlib.h> #include <crtdbg.h> #ifdef _DEBUG #define new DEBUG_CLIENTBLOCK #endif // _DEBUG
2.程序中添加下面的函数：
_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF|_CRTDBG_LEAK_CHECK_DF);
Debug版本程序运行结束后如有内存泄漏，输出窗口中会显示类似信息：
Detected memory leaks!
Dumping objects ->
g:/programs/test/test.cpp(16) : {51} client block at 0x00385C58, subtype 0, 4 bytes long.
Data: < > CD CD CD CD
Object dump complete.
二、MFC程序内存泄漏检测方法：
1.在 CMyApp 中添加如下三个 CMemoryState 类的成员变量：
#ifdef _DEBUG protected: CMemoryState m_msOld, m_msNew, m_msDiff; #endif // _DEBUG
2.在 CMyApp::InitInstance() 中添加如下代码：
#ifdef _DEBUG m_msOld.Checkpoint(); #endif // _DEBUG
3.在 CMyApp::ExitInstance() 中添加如下代码：
#ifdef _DEBUG m_msNew.Checkpoint(); if (m_msDiff.Difference(m_msOld, m_msNew)) { afxDump<<"/nMemory Leaked :/n"; m_msDiff.DumpStatistics(); afxDump<<"Dump Complete !/n/n"; } #endif // _DEBUG
Debug版本程序运行结束后如有内存泄漏，输出窗口中会显示类似信息：
Memory Leaked : 0 bytes in 0 Free Blocks. 8 bytes in 1 Normal Blocks. 0 bytes in 0 CRT Blocks. 0 bytes in 0 Ignore Blocks. 0 bytes in 0 Client Blocks. Largest number used: 8825 bytes. Total allocations: 47506 bytes. Dump Complete ! Detected memory leaks! Dumping objects -> g:/programs/chat/chatdlg.cpp(120) : {118} normal block at 0x00D98150, 8 bytes long. Data: < > A8 7F D9 00 01 00 00 00 Object dump complete.
