crash in wxmsw30u_gcc48.dll with code: 0xc0000005

Do you have a typical platform dependent issue you're battling with ? Ask it here. Make sure you mention your platform, compiler, and wxWidgets version.
Post Reply
Rob'
Experienced Solver
Experienced Solver
Posts: 68
Joined: Mon Dec 08, 2008 10:10 pm

crash in wxmsw30u_gcc48.dll with code: 0xc0000005

Post by Rob' »

I have several applications, developed with wx 3.0.1. They all are working well alone or in different combinations. If I start the 5th application, this app crashes with this message:

Code: Select all

Name des fehlerhaften Moduls: wxmsw30u_gcc48.dll, Version: 3.0.1.0, Zeitstempel: 0x53c5f69f
Ausnahmecode: 0xc0000005
Fehleroffset: 0x005217d3
It does not depend on in which order I start the applications. Does anybody know the reason for this behavior?

Thanks in advance.
Rob'
User avatar
doublemax
Moderator
Moderator
Posts: 19116
Joined: Fri Apr 21, 2006 8:03 pm
Location: $FCE2

Re: crash in wxmsw30u_gcc48.dll with code: 0xc0000005

Post by doublemax »

Impossible to say with that little information. Use a debug build and get a stacktrace.
Use the source, Luke!
ONEEYEMAN
Part Of The Furniture
Part Of The Furniture
Posts: 7459
Joined: Sat Apr 16, 2005 7:22 am
Location: USA, Ukraine

Re: crash in wxmsw30u_gcc48.dll with code: 0xc0000005

Post by ONEEYEMAN »

Hi,
Are you using static or dynamic build of the library?
Did the crash occur during start-up?

Thank you.
Nunki
Filthy Rich wx Solver
Filthy Rich wx Solver
Posts: 235
Joined: Fri Sep 14, 2012 8:26 am
Location: Kontich, Belgium
Contact:

Re: crash in wxmsw30u_gcc48.dll with code: 0xc0000005

Post by Nunki »

Rob,

Usually that error code tells me I have a null pointer, or at least some uninitialised pointer. You also have to be aware that you may ignore warnings of your compiler, but they may point you to the fact that this may happen. It will compile your program into executable code, but you may run into runtime errors - like these. Also, I did at one time have a program that ran fine on Win7 and had such problems on Win10. Examining the application on a Win10 environment lead me to some uninitialised classes.

Happy hunting (bugs)
Regards
Nunki
Rob'
Experienced Solver
Experienced Solver
Posts: 68
Joined: Mon Dec 08, 2008 10:10 pm

Re: crash in wxmsw30u_gcc48.dll with code: 0xc0000005

Post by Rob' »

Thanks for your replies.

What I did:
I started 4 programs (in release build). Then I started a 5th program in debug build out of my IDE and got a segmentation fault:

Code: Select all

#0 63D8677C	wxRefCounter::IncRef(this=0xc)                                  (../../include/wx/object.h:248)
#1 63D13579	wxGrid::GetCellAttr(this=0x85b21d8, row=-1, col=-1)             (../../src/generic/grid.cpp:7727)
#2 63D0E28E	wxGrid::IsCellEditControlShown(this=0x85b21d8)                  (../../src/generic/grid.cpp:6319)
#3 63D008A0	wxGrid::CalcDimensions(this=0x85b21d8)                          (../../src/generic/grid.cpp:2606)
#4 63CFFC14	wxGrid::SetTable(this=0x85b21d8, table=0x85b2f90, takeOwnership=true, selmode=wxGrid::wxGridSelectCells) 	
                                                                 (../../src/generic/grid.cpp:2391)
#5 63CFF6B8	_fu873__wxTrapInAssert()                                        (../../src/generic/grid.cpp:2305)
#6 004A9A3B	_fu693__wxDefaultPosition()                                     (C:\dev\visuclasses\errors\errwindowbase.cpp:23)
#7 0046F786	_fu647__wxDefaultPosition()                                     (C:\dev\visuclasses\errors\errwindow.cpp:15)
#8 00446E93	_fu576__wxDefaultPosition()                                     (C:\...\main\mainframe.cpp:93)
#9 00448244	_fu1304__wxEmptyString()                                        (C:\...\main\visuapp.cpp:92)
#10 004FBEF6	wxAppConsoleBase::CallOnInit(this=0x79629b0)                   (C:/dev/wxWidgets3.0/include/wx/app.h:93)
#11 67B3208E	wxEntryReal(argc=@0x21c0564: 1, argv=0x7961bd8)                (../../src/common/init.cpp:479)
#12 67BEC94C	wxEntry(argc=@0x21c0564: 1, argv=0x7961bd8)                    (../../src/msw/main.cpp:197)
#13 01CA8B2B	wxEntry(hInstance=0x400000, nCmdShow=10)                       (../../src/msw/main.cpp:415)
#14 00447C6F	WinMain@16(hInstance=0x400000, hPrevInstance=0x0, nCmdShow=10) (C:\...\main\visuapp.cpp:36)
#15 0057005B	main ()                                                        (??:??)
[/size]
And this is the code:

Code: Select all

	ErrList = new wxGrid( this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxVSCROLL );
	
	// Grid
	ErrList->CreateGrid( 0, 3 );
The last line causes the crash. The file was created by wxFormBuilder.

Rob'
User avatar
doublemax
Moderator
Moderator
Posts: 19116
Joined: Fri Apr 21, 2006 8:03 pm
Location: $FCE2

Re: crash in wxmsw30u_gcc48.dll with code: 0xc0000005

Post by doublemax »

Can you try what happens when you link wxWidgets statically?

And the opposite test, can you build the "grid" sample that comes with wxWidgets with dynamic linking and then start 5 instances of the sample and see what happen?
Use the source, Luke!
Nunki
Filthy Rich wx Solver
Filthy Rich wx Solver
Posts: 235
Joined: Fri Sep 14, 2012 8:26 am
Location: Kontich, Belgium
Contact:

Re: crash in wxmsw30u_gcc48.dll with code: 0xc0000005

Post by Nunki »

Hi Rob,

Code: Select all

 ErrList->CreateGrid( 0, 3 );
So you create a grid with no rows and three columns, right ?

Now, if you do any action before you add a row with

Code: Select all

ErrList->InsertRows(1,ErrList->Count(),false);
You will get such an access violation error.

Regards
Nunki
Rob'
Experienced Solver
Experienced Solver
Posts: 68
Joined: Mon Dec 08, 2008 10:10 pm

Re: crash in wxmsw30u_gcc48.dll with code: 0xc0000005

Post by Rob' »

doublemax wrote:Can you try what happens when you link wxWidgets statically?
Sorry, that's above me. I get a lot of strange linker errors when I build my program. I'm using my own library, that is using wxGrid. This library links wxWidgets dynamically. I guess it is not possible to use a mix, isn't it?
And the opposite test, can you build the "grid" sample that comes with wxWidgets with dynamic linking and then start 5 instances of the sample and see what happen?
The compiler runs w/o errors or warnings. But if I start the programm, I get a wxWidgets debug alert:

Code: Select all

../..src/msw/window.cpp(3750): assert "wclass" failed in MSWCreate():
failed to register window class?
What is going wrong here?

@Nunki:
I do not operate with nonexistent rows. As a next step after creation I append the required number of rows. This is similar to the wxWidgets grid sample.
Nunki
Filthy Rich wx Solver
Filthy Rich wx Solver
Posts: 235
Joined: Fri Sep 14, 2012 8:26 am
Location: Kontich, Belgium
Contact:

Re: crash in wxmsw30u_gcc48.dll with code: 0xc0000005

Post by Nunki »

Hi Rob,
Am I correct that you have an application which uses your library (which is a dll) which uses the wx-dll. Now I don't know your program but what I would do for starters is to put everything into one big application, no dll's or static libraries. And see how that works out, just to rule out problems on the level of communication between these parts. e.g. you could have built your library in 32-bit an now created a new fifth application in 64bit by mistake, thus having strange behaviour between application an dll because of the differences between 32 and 64bit code. Just an example.

Now the fact that 4 of your applications are built in release build and this one in debug build, does not necessarily mean the 4 applications are bugfree. They may have a similar problem but pass unnoticed because release builds are stripped of all debugging code. I would also try and build those 4 in debug mode to see if they display the same or similar behaviour.

Regards,
Nunki
coderrc
Earned some good credits
Earned some good credits
Posts: 141
Joined: Tue Nov 01, 2016 2:46 pm

Re: crash in wxmsw30u_gcc48.dll with code: 0xc0000005

Post by coderrc »

does this occur on every computer or just 1?
Post Reply