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c++内存泄漏处理（积累）

2024-07-16 14:04:08   223人阅读

写c++程序时，经常会出现内存泄漏的问题，这里从网上找了一种很麻烦的方法：如果想找到每个cpp文件的内存泄漏，都必须在每个cpp加上如下代码：

#include <crtdbg.h>
#ifdef _DEBUG
#define DEBUG_CLIENTBLOCK   new(_CLIENT_BLOCK, __FILE__, __LINE__)
#define new DEBUG_CLIENTBLOCK
#else
#define DEBUG_CLIENTBLOCK
#endif

下面给出一段测试的代码

test.h

#include <memory.h>

void funNew();
test.cpp

#include "text.h"

#include <crtdbg.h>
#ifdef _DEBUG
#define DEBUG_CLIENTBLOCK   new(_CLIENT_BLOCK, __FILE__, __LINE__)
#define new DEBUG_CLIENTBLOCK
#else
#define DEBUG_CLIENTBLOCK
#endif

void funNew()
{
	int *p = new int();
}
main.cpp

#include <iostream>
#include <assert.h>
#include "text.h"

#include <crtdbg.h>
#ifdef _DEBUG
#define DEBUG_CLIENTBLOCK   new(_CLIENT_BLOCK, __FILE__, __LINE__)
#define new DEBUG_CLIENTBLOCK
#else
#define DEBUG_CLIENTBLOCK
#endif

int main()
{
	_CrtSetDbgFlag (_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);

	int* p = new int();
	funNew();
	//delete p;
	return 0;
}

输出

Detected memory leaks!
Dumping objects ->
f:\project1\test.cpp(13) : {157} client block at 0x001E9180, subtype 0, 4 bytes long.
 Data: <    > 00 00 00 00 
f:\project1\main.cpp(17) : {156} client block at 0x001E9140, subtype 0, 4 bytes long.
 Data: <    > 00 00 00 00 
Object dump complete.


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