C / C++ / MFC

5-Mar-10 18:07

Hi all,

i m working on Dialog based application,

here diffreant types of controls placed over the dialog box like,Edit box,static box,button,list elc.
some dialog boxes popup on button clicked.

after some time using of application its becomes so slow,even if i restore it from minimize state its take some time to display the controls of dialog box.

and the memory usage of application increase and increase.

please tell me how can i reduce the memory usage of application,and make it stable wheather its use or long time,

please tell me how can i resolve the problem of slow responding or not responding.

thanks in advance.

Stephen Hewitt5-Mar-10 22:18

Stephen Hewitt

5-Mar-10 22:18

Try Googling "memory leaks".

Steve

CPallini6-Mar-10 0:42

CPallini

6-Mar-10 0:42

As Steve suggested, your application probably doesn't perform well the necessary cleanup, i.e. keeps allocating new objects without calling delete on the 'dead' ones.
Correct handling of dynamic memory is one of the major duties of the C/C++ developer.
Smile | :)

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-- Alfonso the Wise, 13th Century King of Castile.

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Eugen Podsypalnikov6-Mar-10 9:01

6-Mar-10 9:01

Try to analyze debuggers output lines after the applications exit Smile | :)

Check your definition of Irrationality[^] Smile | :)

1 - Avicenna
5 - Hubbard
3 - Own definition

Le@rner8-Mar-10 0:03

8-Mar-10 0:03

Eugen Podsypalnikov wrote:
Try to analyze debuggers output lines after the applications exit

i dont know how to use this?
please tell me how can i do this.

Eugen Podsypalnikov8-Mar-10 3:01

8-Mar-10 3:01

Build a debug version, start its debugging (F5),
then close the app and observe the output window in VS.

Usually you can even jump to the source, like ... = new ...,
just by a double click at a "memory leak" line there Smile | :)

Check your definition of Irrationality[^] Smile | :)

1 - Avicenna
5 - Hubbard
3 - Own definition

Le@rner8-Mar-10 17:06

8-Mar-10 17:06

Its looks like this.

'Test.exe': Loaded 'C:\Windows\System32\ntdll.dll'
'Test.exe': Loaded 'C:\Windows\System32\kernel32.dll'
'Test.exe': Loaded 'C:\Windows\System32\user32.dll'
'Test.exe': Loaded 'C:\Windows\System32\gdi32.dll'
'Test.exe': Loaded 'C:\Windows\System32\advapi32.dll'
'Test.exe': Loaded 'C:\Windows\System32\rpcrt4.dll'
'Test.exe': Loaded 'C:\Windows\System32\msimg32.dll'
'Test.exe': Loaded 'C:\Windows\System32\comdlg32.dll'
'Test.exe': Loaded 'C:\Windows\System32\msvcrt.dll'
'Test.exe': Loaded 'C:\Windows\System32\shlwapi.dll'
'Test.exe': Loaded 'C:\Windows\winsxs\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.6002.18005_none_5cb72f96088b0de0\comctl32.dll'
'Test.exe': Loaded 'C:\Windows\System32\shell32.dll'
'Test.exe': Loaded 'C:\Windows\System32\winspool.drv'
'Test.exe': Loaded 'C:\Windows\System32\oledlg.dll'
'Test.exe': Loaded 'C:\Windows\System32\ole32.dll'
'Test.exe': Loaded 'C:\Windows\System32\oleaut32.dll'
'Test.exe': Loaded 'C:\Windows\System32\winmm.dll'
'Test.exe': Loaded 'C:\Windows\System32\oleacc.dll'
'Test.exe': Loaded 'C:\Windows\System32\imm32.dll'
'Test.exe': Loaded 'C:\Windows\System32\msctf.dll'
'Test.exe': Loaded 'C:\Windows\winsxs\x86_microsoft.windows.gdiplus_6595b64144ccf1df_1.0.6002.18005_none_9e50b396ca17ae07\GdiPlus.dll'
'Test.exe': Loaded 'C:\Windows\System32\lpk.dll'
'Test.exe': Loaded 'C:\Windows\System32\usp10.dll'
'Test.exe': Loaded 'C:\Windows\System32\uxtheme.dll'
'Test.exe': Loaded 'C:\Windows\System32\dwmapi.dll'
'Test.exe': Loaded 'C:\Windows\System32\clbcatq.dll'
'Test.exe': Loaded 'C:\Windows\System32\wbem\wbemprox.dll'
'Test.exe': Loaded 'C:\Windows\System32\wbemcomn.dll'
'Test.exe': Loaded 'C:\Windows\System32\ws2_32.dll'
'Test.exe': Loaded 'C:\Windows\System32\nsi.dll'
'Test.exe': Loaded 'C:\Windows\System32\rsaenh.dll'
'Test.exe': Loaded 'C:\Windows\System32\wbem\wbemsvc.dll'
'Test.exe': Loaded 'C:\Windows\System32\wbem\fastprox.dll'
'Test.exe': Loaded 'C:\Windows\System32\ntdsapi.dll'
'Test.exe': Loaded 'C:\Windows\System32\dnsapi.dll'
'Test.exe': Loaded 'C:\Windows\System32\Wldap32.dll'
'Test.exe': Loaded 'C:\Windows\System32\psapi.dll'
'Test.exe': Loaded 'C:\Windows\System32\netapi32.dll'
'Test.exe': Loaded 'C:\Windows\System32\secur32.dll'
The thread 'Win32 Thread' (0xaac) has exited with code 0 (0x0).
'Test.exe': Unloaded 'C:\Windows\System32\dwmapi.dll'
The thread 'Win32 Thread' (0xeb4) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0x3a8) has exited with code 0 (0x0).
The program '[3476] Test.exe: Native' has exited with code 0 (0x0).

Eugen Podsypalnikov8-Mar-10 19:41

8-Mar-10 19:41

Was it an output of the Debug vesrsion (configuration) of your application ?
When yes - there are no direct references to the classical memory leaks (by new).

However it would be possible (for example),
that you do not release other kinds of the resources,
such as HPEN, HFILE, HXXX... ,
or you initialize something twice without releasing... Smile | :)

You could try to analyze the code (subject: symmetry of allocation/deallocation),
or use the special tools (when your code is to big for you to analyze)... Smile | :)

Check your definition of Irrationality[^] Smile | :)

1 - Avicenna
5 - Hubbard
3 - Own definition

Le@rner8-Mar-10 20:01

8-Mar-10 20:01

Output window is like this

‘Test.exe’: Loaded 'C:\Windows\System32\ntdll.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\kernel32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\user32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\gdi32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\advapi32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\rpcrt4.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\msimg32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\comdlg32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\msvcrt.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\shlwapi.dll'
‘Test.exe’: Loaded 'C:\Windows\winsxs\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.6002.18005_none_5cb72f96088b0de0\comctl32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\shell32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\winspool.drv'
‘Test.exe’: Loaded 'C:\Windows\System32\oledlg.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\ole32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\oleaut32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\winmm.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\oleacc.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\imm32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\msctf.dll'
‘Test.exe’: Loaded 'C:\Windows\winsxs\x86_microsoft.windows.gdiplus_6595b64144ccf1df_1.0.6002.18005_none_9e50b396ca17ae07\GdiPlus.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\lpk.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\usp10.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\uxtheme.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\dwmapi.dll'
Detected memory leaks!

here i found Detected memory leaks!,but i dont know how can get the location of this memory leak,
how can get at which porint or on wich function memory leaks.

please help me for this.

thanks.

Eugen Podsypalnikov8-Mar-10 20:47

8-Mar-10 20:47

Usually the line "Detected memory leaks!" is not last... Smile | :)

Check your definition of Irrationality[^] Smile | :)

1 - Avicenna
5 - Hubbard
3 - Own definition

Le@rner8-Mar-10 22:08

8-Mar-10 22:08

like this.

‘Test.exe’: Loaded 'C:\Windows\System32\ntdll.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\kernel32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\user32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\gdi32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\advapi32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\rpcrt4.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\msimg32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\comdlg32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\msvcrt.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\shlwapi.dll'
‘Test.exe’: Loaded 'C:\Windows\winsxs\x86_microsoft.windows.common-controls_6595b64144ccf1df_6.0.6002.18005_none_5cb72f96088b0de0\comctl32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\shell32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\winspool.drv'
‘Test.exe’: Loaded 'C:\Windows\System32\oledlg.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\ole32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\oleaut32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\winmm.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\oleacc.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\imm32.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\msctf.dll'
‘Test.exe’: Loaded 'C:\Windows\winsxs\x86_microsoft.windows.gdiplus_6595b64144ccf1df_1.0.6002.18005_none_9e50b396ca17ae07\GdiPlus.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\lpk.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\usp10.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\uxtheme.dll'
‘Test.exe’: Loaded 'C:\Windows\System32\dwmapi.dll'
‘Test.exe’: Unloaded 'C:\Windows\System32\dwmapi.dll'
The thread 'Win32 Thread' (0x16fc) has exited with code 1 (0x1).
Detected memory leaks!
Dumping objects ->
{235} normal block at 0x00F66728, 145 bytes long.
 Data: <    d           > C0 15 9D 01 64 00 00 00 80 00 00 00 01 00 00 00 
{227} normal block at 0x00F666D8, 20 bytes long.
 Data: <                > C0 15 9D 01 03 00 00 00 03 00 00 00 01 00 00 00 
{226} normal block at 0x00F66640, 85 bytes long.
 Data: <    D   D       > C0 15 9D 01 44 00 00 00 44 00 00 00 01 00 00 00 
{225} normal block at 0x00F66598, 103 bytes long.
 Data: <    V   V       > C0 15 9D 01 56 00 00 00 56 00 00 00 01 00 00 00 
Object dump complete.
The program '[4540] Test.exe: Native' has exited with code 0 (0x0).

Eugen Podsypalnikov8-Mar-10 22:11

8-Mar-10 22:11

Just double click at {XXX} Smile | :)

Check your definition of Irrationality[^] Smile | :)

1 - Avicenna
5 - Hubbard
3 - Own definition

Le@rner8-Mar-10 22:16