說明，我使用的ide是vs2008 1. 工程設置為debug 內存洩露的檢測一般在debug模式下進行 2.在需要檢查內存洩露的cpp頭部加上 [cpp] #ifdef _DEBUG #define _CRTDBG_MAP_ALLOC #include <stdlib.h> #include <crtdbg.h> #define new new(_NORMAL_BLOCK, __FILE__, __LINE__) #endif 3.代碼中插入這麼一句話 EnableMemLeakCheck(); [cpp] inline void EnableMemLeakCheck() { _CrtSetDbgFlag(_CrtSetDbgFlag(_CRTDBG_REPORT_FLAG) | _CRTDBG_LEAK_CHECK_DF); } 4.然後就可以在輸出中看洩露情況了 舉個例子，例子中我用newEx表示的上述宏定義中的new [cpp] int _tmain(int argc, _TCHAR* argv[]) { EnableMemLeakCheck(); int num = 10; byte **p = newEx byte *[num]; for (int i = 0; i < num; i ++) { Sleep(1); *p = newEx byte[i]; } long *pl = newEx long[100]; while(1) { Sleep(100); } return 0; } 輸出中顯示的內容（debug下運行程序，然後點叉叉關閉程序） memory leaks! Dumping objects -> e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(101) : {124} normal block at 0x00295CB8, 400 bytes long. Data: < > CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : {122} normal block at 0x00294C30, 9 bytes long. Data: < > CD CD CD CD CD CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : {121} normal block at 0x00294BE8, 8 bytes long. Data: < > CD CD CD CD CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : {120} normal block at 0x00299F88, 7 bytes long. Data: < > CD CD CD CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : {119} normal block at 0x00299F40, 6 bytes long. Data: < > CD CD CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : {118} normal block at 0x00299EF8, 5 bytes long. Data: < > CD CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : {117} normal block at 0x00299EB8, 4 bytes long. Data: < > CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : {116} normal block at 0x00299E78, 3 bytes long. Data: < > CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : {115} normal block at 0x00299E38, 2 bytes long. Data: < > CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : {114} normal block at 0x00299DF8, 1 bytes long. Data: < > CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : {113} normal block at 0x00299DB8, 0 bytes long. Data: <> 勵p e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(88) : {112} normal block at 0x00299D50, 40 bytes long. Data: <0L) > 30 4C 29 00 CD CD CD CD CD CD CD CD CD CD CD CD Object dump complete. 有文件名和行號，先申請的後釋放。 擴展： 實際上是使用了另外的new，在dbgnew.cpp中，列一個例子說明： [cpp] void *__CRTDECL operator new[]( size_t cb, int nBlockUse, const char * szFileName, int nLine ) _THROW1(_STD bad_alloc) { void *res = operator new(cb, nBlockUse, szFileName, nLine ); RTCCALLBACK(_RTC_Allocate_hook, (res, cb, 0)); return res; } 注意，const char *szFileName可以使用__file__也可以使用自定義的類，經過重載為char*（感謝老馬提供代碼） 例如： [cpp] char new_index_recorder_file_name[1024 * 1024][256]; class new_index_recorder{ public: new_index_recorder(char* file, int line) : file(file), line(line){ } operator char*(){ static unsigned int index; sprintf(new_index_recorder_file_name[index], "%s(%d) : %d ", file, line, index++); return new_index_recorder_file_name[index]; } private: char* file; int line; }; 當然，也可以用函數來返回char*指針 [cpp] int g_count = 0; class OperNew { public: OperNew() { g_count ++; pC = new char[20]; memset(pC, 0, 10); sprintf(pC, "No.%d", g_count); } char* GetChar() { return pC; } private: char * pC ; }; 這樣就能返回自定義的內容了。本次的返回加上了一個構造時候的序號，當然也可以添加時間等。結果如下： e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(95) : 11 (95) : {123} normal block at 0x002B4C78, 400 bytes long. Data: < > CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : 10 (92) : {122} normal block at 0x002B4C30, 9 bytes long. Data: < > CD CD CD CD CD CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : 9 (92) : {121} normal block at 0x002B4BE8, 8 bytes long. Data: < > CD CD CD CD CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : 8 (92) : {120} normal block at 0x002B9F88, 7 bytes long. Data: < > CD CD CD CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : 7 (92) : {119} normal block at 0x002B9F40, 6 bytes long. Data: < > CD CD CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : 6 (92) : {118} normal block at 0x002B9EF8, 5 bytes long. Data: < > CD CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : 5 (92) : {117} normal block at 0x002B9EB8, 4 bytes long. Data: < > CD CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : 4 (92) : {116} normal block at 0x002B9E78, 3 bytes long. Data: < > CD CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : 3 (92) : {115} normal block at 0x002B9E38, 2 bytes long. Data: < > CD CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : 2 (92) : {114} normal block at 0x002B9DF8, 1 bytes long. Data: < > CD e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(92) : 1 (92) : {113} normal block at 0x002B9DB8, 0 bytes long. Data: <> h鴌 e:\project\test\test_mem_leak\test_mem_leak\test_mem_leak.cpp(88) : 0 (88) : {112} normal block at 0x002B9D50, 40 bytes long. Data: <0L+ > 30 4C 2B 00 CD CD CD CD CD CD CD CD CD CD CD CD Object dump complete. 程序“[8796] test_MEM_LEAK.exe: 本機”已退出，返回值為 -1073741510 (0xc000013a)。 小提示： 將輸出文件拷貝到UE中，然後查找洩露行號出現的次數，可以計算出洩露的數目。
