[Insight-users] problem with running gdb on cygwin

[Luis Ibanez]

Hi Kris,

This seems to be a threading problem...
are you running in a dual processor machine ?


Please let us know,


  Thanks


    Luis



------------------------
Thielemans, Kris wrote:
> Hi
>  
>  
> I am trying to run gdb on Examples/Registration/DeformableRegistration7, 
> but gdb gets stuck quickly (even before reading any data). This happens 
> even on data for which the program runs fine if I don't use gdb.
>  
> My configuration:
> 
> ITK 2.2 on a fairly recent cygwin installation  (cygwin 1.5.18-1, gcc 
> 3.4.4-1, binutils 20050610-1, cmake 2.0.6-1,  gdb 6.3.50_2004-12-28-cvs; 
> none of which have any updates available via cygwin's setup) running  on 
> top of XP sp2. I've used ccmake to do the configuration with selecting 
> the Debug build-type.
> 
>  
> 
> What I do is:
> 
> break main
> run
> next a few times
> 
> gdb/the program then hangs in the line
> 
>  TransformType::Pointer  transform = TransformType::New();
> 
> If I single step through that one I end up in KERNEL32!IsBadWritePtr 
> (see reproducible debugging session below).
> 
> Ok, the program does seem to work fine, but this makes me feel 
> uncomfortable, and I'd like to be able to use gdb. It could of course be 
> a cygwin-gdb problem.
> 
>  
> 
> Any suggestions?
> 
>  
> 
> Kris Thielemans
> Hammersmith Imanet Ltd
> part of GE Healthcare
> London, UK
> 
>  
> 
> PS: debugging session:
> 
> (gdb) r
> Starting program: 
> /home/kris/MyDocuments/devel/ITK/ITK-bin-debug/bin/DeformableRegistration7.exe 
> largervox_atn_2.mha largervox_atn_1.mha largervox_atn_2_to_1.mha
> 
> Breakpoint 1, main (argc=4, argv=0x1332878)
>     at 
> /home/kris/MyDocuments/devel/ITK/InsightToolkit-2.2.0/Examples/Registration/DeformableRegistration7.cxx:119
> 119 {
> (gdb) n 12
> 195   TransformType::Pointer  transform = TransformType::New();
> (gdb) s 29
> itk::LightObject::operator new (n=272)
>     at 
> /home/kris/MyDocuments/devel/ITK/InsightToolkit-2.2.0/Code/Common/itkLightObject.cxx:78
> 78   return new char[n];
> (gdb) backtrace
> #0  itk::LightObject::operator new (n=272)
>     at 
> /home/kris/MyDocuments/devel/ITK/InsightToolkit-2.2.0/Code/Common/itkLightObject.cxx:78
> #1  0x00636fc9 in itk::BSplineDeformableTransform<double, 3u, 3u>::New ()
>     at 
> /home/kris/MyDocuments/devel/ITK/InsightToolkit-2.2.0/Code/Common/itkBSplineDeformableTransform.h:121
> #2  0x00401391 in main (argc=4, argv=0x1332878)
>     at 
> /home/kris/MyDocuments/devel/ITK/InsightToolkit-2.2.0/Examples/Registration/DeformableRegistration7.cxx:195
> (gdb) s
> 0x005bb3d6 in operator new[] ()
>     at /usr/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/iostream:77
> 77   static ios_base::Init __ioinit;
> (gdb)
> 0x6109dbe0 in pthread_getspecific () from /usr/bin/cygwin1.dll
> (gdb)
> Single stepping until exit from function pthread_getspecific,
> which has no line number information.
> 0x6109d010 in cygwin1!__getreent () from /usr/bin/cygwin1.dll
> (gdb)
> Single stepping until exit from function cygwin1!__getreent,
> which has no line number information.
> 0x610e0bb0 in cygwin1!_alloca () from /usr/bin/cygwin1.dll
> (gdb)
> Single stepping until exit from function cygwin1!_alloca,
> which has no line number information.
> 0x7c809f29 in KERNEL32!IsBadWritePtr () from 
> /c/WINDOWS/system32/kernel32.dll
> (gdb)
> Single stepping until exit from function KERNEL32!IsBadWritePtr,
> 
> (It never gets out of here).
> 
> 
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