内存泄漏查找c++ new delete

来源：互联网发布：米思米软件pan 编辑：程序博客网时间：2024/05/06 10:23

#include <iostream>#include <stdlib.h>struct MemIns{    void *pMem;    int m_nSize;    char m_szFileName[256];    int m_nLine;    MemIns *pNext;};class MemManager{public:        MemManager();        ~MemManager();private:        MemIns *m_pMemInsHead;        int m_nTotal;public:        static MemManager* GetInstance();        void Append(MemIns *pMemIns);        void Remove(void *ptr);        void Dump(); };void *operator new(size_t size, const char*szFile, int nLine);void operator delete(void*ptr, const char*szFile, int nLine);void operator delete(void*ptr);void *operator new[] (size_t size, const char*szFile, int nLine);void operator delete[](void*ptr, const char*szFile, int nLine);void operator delete[](void *ptr);

#include"memchecker.h"#include<stdio.h>#include<malloc.h>#include<string.h>MemManager::MemManager(){    m_pMemInsHead=NULL;    m_nTotal=NULL;}MemManager::~MemManager(){}void MemManager::Append(MemIns *pMemIns){    pMemIns->pNext=m_pMemInsHead;    m_pMemInsHead = pMemIns;    m_nTotal+= m_pMemInsHead->m_nSize;}void MemManager::Remove(void *ptr){    MemIns * pCur = m_pMemInsHead;    MemIns * pPrev = NULL;    while(pCur)    {        if(pCur->pMem ==ptr)        {            if(pPrev)            {                pPrev->pNext =pCur->pNext;            }            else            {                m_pMemInsHead =pCur->pNext;            }            m_nTotal-=pCur->m_nSize;            free(pCur);            break;        }        pPrev = pCur;        pCur = pCur->pNext;    }}void MemManager::Dump(){    MemIns *pp = m_pMemInsHead;    while(pp)    {        printf( "File is %s\n", pp->m_szFileName );        printf( "Size is %d\n", pp->m_nSize );        printf( "Line is %d\n", pp->m_nLine );        pp = pp->pNext;    }}void PutEntry(void *ptr,int size,const char*szFile, int nLine){    MemIns * p = (MemIns *)(malloc(sizeof(MemIns)));    if(p)    {        strcpy(p->m_szFileName,szFile);        p->m_nLine = nLine;        p->pMem = ptr;        p->m_nSize = size;        MemManager::GetInstance()->Append(p);    }}void RemoveEntry(void *ptr){    MemManager::GetInstance()->Remove(ptr);}void *operator new(size_t size,const char*szFile, int nLine){    void *ptr = malloc(size);    PutEntry(ptr,size,szFile,nLine);    return ptr;}void operator delete(void *ptr){    RemoveEntry(ptr);    free(ptr);}void operator delete(void*ptr,const char *file, int line){    RemoveEntry(ptr);    free(ptr);}void*operator new[] (size_t size,const char* szFile,int nLine){    void * ptr = malloc(size);    PutEntry(ptr,size,szFile,nLine);    return ptr;}void operator delete[](void *ptr){    RemoveEntry(ptr);    free(ptr);}void operator delete[](void*ptr,const char*szFile,int nLine){    RemoveEntry(ptr);    free(ptr);}#define new new(__FILE__,__LINE__)MemManager m_memTracer;MemManager*MemManager::GetInstance(){    return &m_memTracer;} int main(void){    int *plen =new int ;    *plen=10;    delete plen;    char *pstr=new char[35];    strcpy(pstr,"hello memory leak");    m_memTracer.Dump();    return 0;}

运行结果

[root@test memcheck]# ./memcheck File is memchecker.cppSize is 35Line is 148

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