[vtkusers] Memory leaks....

[이창원]

Hello

 

You have to delay load vtk dlls too. (such as vtkcommon, vtkrendering, etc)

 

regards

 

  _____  

From: vtkusers-bounces+bosscq=nexgeo.com at vtk.org [mailto:vtkusers-
bounces+bosscq=nexgeo.com at vtk.org] On Behalf Of echinococcus Multilocularis
Sent: Monday, October 30, 2006 6:37 AM
To: David Cole
Cc: vtkusers at vtk.org
Subject: Re: [vtkusers] Memory leaks....

 

Thank you for your response. I did what you suggested, to be precise, the
second option. I added the linker option /DELAYLOAD:vtkMFC.dll. (I use
vtkRendering.dll as well, should this one be delayed as well?) However, the
result was now that there was an unresolved symbol:

 

vtkMFC.lib(vtkMFC.dll) : error LNK2001: unresolved external symbol
___delayLoadHelper at 8
Debug/VTKStart.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

After a little googling, i noticed i should add the lib: Delayimp.lib. So i
added the lib, and the compilation went fine again. However, now, the
memory leaks returned. Is there something else wrong, or am i forgetting
something?

 

Secondly, if i were to go the other path, which files do I have to
download? Only the files that are in the GUISupport/MFC/ or others as well?

 

Thank you again for your response.

 

Sincerely,

Han

----- Original Message ----
From: David Cole <david.cole at kitware.com>
To: echinococcus Multilocularis <lintworm2 at yahoo.co.uk>
Cc: vtkusers at vtk.org
Sent: Sunday, 29 October, 2006 5:56:43 PM
Subject: Re: [vtkusers] Memory leaks....

The problem is that VTK dlls are loaded before the MFC dll, and at shutdown
time, the MFC dll is unloaded before the VTK dlls... And when the MFC dll
unloads, it does a memory leak check and incorrectly reports that all the
VTK objects still left are leaks. 

You can overcome this by updating VTK to the CVS version and rebuilding VTK
with VTK_USE_GUISUPPORT and VTK_USE_MFC  turned on. I recently added flags
to the CMakeLists to eliminate these false memory leak reports. 

Alternatively, you can use the /DELAYLOAD linker flag to force the VTK dlls
to be loaded after the MFC dll and then they will also be unloaded prior to
the MFC dll. Then any leak reports that you see will be for real... (This
is what I added in CVS VTK to fix the problem.) 

HTH,
David



On 10/29/06, echinococcus Multilocularis <lintworm2 at yahoo.co.uk> wrote: 

Hello all,

I finally got my M$ VC project working, using vtkMFCWindow. In this program
i read some geometrical data from disk using my own readerfunction. I then
display it using vtkMFCWindow. That all works fine, until i close the
program and clean up the memory. At the end of program i get a message that
memory leaks are detected. The problem is, that i really have no clue where
they are from. When i look at the data dumped by VC, i find references to
all kinds of objects i never have used. Can anybody tell me what i am doing
wrong, or give me any other clues? I have build my program mostly using the
examples given for vtkMFCWindow, however, also these examples give me the
same problems. 

Thanking in advance,

Han

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