_CRTDBG_MAP_ALLOC not showing file name
c++, crtdbg.h, debugging, memory-leaks
Solution
It seems the line of the leak only is displayed if the CRT is turned on in that cpp file.
Problem
I am trying to detect memory leak, and I am using make _CRTDBG_MAP_ALLOC macro to locate where the leaks area. So I am defining MACRO like following: ``` #ifdef _DEBUG #define _CRTDBG_MAP_ALLOC #include <stdlib.h> #include <crtdbg.h> #define DEBUG_NEW new(_NORMAL_BLOCK, __FILE__, __LINE__) #define new DEBUG_NEW #endif ``` In my code, I have: ``` UINT SomeFunThread( LPVOID pParam ) { _CrtMemState crtMemStateStart; _CrtMemState crtMemStateFinish; _CrtMemCheckpoint(&crtMemStateStart); // My suspisious code _CrtMemCheckpoint(&crtMemStateFinish); int nDifference(0); _CrtMemState crtMemStateDifference; nDifference = _CrtMemDifference(&crtMemStateDifference, &crtMemStateStart, &crtMemStateFinish); if(nDifference > 0) _CrtDumpMemoryLeaks(); return 0; } ``` (Thanks to Tushar Jadhav: Memory consumption increases quickly, then drops very slowly; memory leak?) But the output shows something like: ``` Detected memory leaks! Dumping objects -> {124058} normal block at 0x0000000031DED080, 24 bytes long. Data: < 0 ` $ > C8 30 F7 EF FE 07 00 00 60 D2 24 1D 00 00 00 00 ``` instead of something like this: ``` Detected memory leaks! Dumping objects -> C:\PROGRAM FILES\VISUAL STUDIO\MyProjects\leaktest\leaktest.cpp(20) : {18} normal block at 0x00780E80, 64 bytes long. Data: < > CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD Object dump complete. ``` So how can I make this show the file name and location of the leak?