GDI leakage and Memory leakage detection methods

GDI leak detection method:

1. Check whether getwindowdc () and releasedc () exist ()

2. cfont * poldfont = PDC-> SelectObject (& m_font );

Whether there is PDC-> SelectObject (poldfont );

3. cbitmap BMP;
BMP. createcompatiblebitmap (& DC, rcclient. Width (), rcclient. Height ());

Do you remember BMP. deleteobject ();

 

Memory leakage detection method

1. Check new, virtualalloc,HeapAlloc,malloc Is it not released?

2. _ crtmemstate S1, S2, S3;
_ Crtmemcheckpoint (& S1 );
// Memory allocations take place here
_ Crtmemcheckpoint (& S2 );
　　
If (_ crtmemdifference (& S3, & S1, & S2 ))
_ Crtmemdumpstatistics (& S3 );

 

Cmemorystate msold;

Msold. Checkpoint ();

 

Msold. dumpallobjectssince ();

 

3. _ crtsetbreakalloc (18 );

4. boundschecker Tool

5. F:/RTM/vctools/vc7libs/ship/atlmfc/src/mfc/strcore. cpp (141)
If the above output is displayed, use _ crtdumpmemoryleaks (); for debugging.

F:/sourcesafe fold/mccsclient/mccsclientdlg. cpp (1863): {63669} normal block at 0x02f21278, 8 bytes long.
Data: <x> E8 CC F1 02 F0 78 F1 02

 

Generally, this problem is caused by cstring. simply change it to the char pointer type.