_CRTDBG_MAP_ALLOC 不显示文件名

我正在尝试检测内存泄漏，并且使用 make _CRTDBG_MAP_ALLOC 宏来定位泄漏区域。所以我定义 MACRO 如下：

#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

在我的代码中，我有：

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;
}

（感谢 Tushar Jadhav：内存消耗快速增加，然后缓慢下降；内存泄漏？ https://stackoverflow.com/questions/19577638/memory-consumption-increases-quickly-then-drops-very-slowly-memory-leak)

但输出显示类似：

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 

而不是这样的：

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.

那么如何才能显示泄漏的文件名和位置呢？

似乎只有在该 cpp 文件中打开 CRT 时才会显示泄漏行。