思路就是覆蓋原有的malloc和free函數，并記錄內存申請和釋放情況

struct MEM_INFO {int m_addr;int m_size;char m_strFile[1024];int m_nLine; };hash_map<int, MEM_INFO> hstbl;void* xmalloc(unsigned int size, const char* strFile, int nLine) {void* pRet = malloc(size);MEM_INFO info;info.m_addr = (int)pRet;info.m_size = size;strcpy(info.m_strFile, strFile);info.m_nLine = nLine;hstbl[info.m_addr] = info;return pRet; }void xfree(void* p) {hash_map<int, MEM_INFO>::iterator it = hstbl.find((int)p);if(it == hstbl.end()) return;free(p);hstbl.erase(it); }#define malloc(x) xmalloc(x, __FILE__, __LINE__)//調用malloc的文件以及對應的行 #define free(x) xfree(x)void PrintLeak() {hash_map<int, MEM_INFO>::iterator it = hstbl.begin();for (; it != hstbl.end(); it++){cout<<"Memory leak at File: "<<it->second.m_strFile<<" line: "<<it->second.m_nLine<<" address: "<<it->second.m_nLine<<" size: "<<it->second.m_size<<endl;cout<<"******************************************************************"<<endl;} }void test() {void* p = malloc(sizeof(int));void* q = malloc(sizeof(int));free(p);PrintLeak(); }

總結

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