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IDProjectCategoryView StatusDate SubmittedLast Update
0006771VTK(No Category)public2008-04-08 09:302016-08-12 09:54
ReporterLevap 
Assigned ToKitware Robot 
PrioritynormalSeveritycrashReproducibilityalways
StatusclosedResolutionmoved 
PlatformOSOS Version
Product Version 
Target VersionFixed in Version 
Summary0006771: Bug in vtkImageReader
DescriptionThe following code snippet leads to crash (null pointer access) on a Windows XP 32bit SP2, with 2 GB RAM.

Code snippet:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vtkImageData* img = vtkImageDate::New();

vtkImageReader* ir = vtkImageReader::New();
ir->SetFileName(“d:\\myvolume.raw”);
ir->SetFileDimensionality(3);
ir->SetDataByteOrderToLittleEndian();
ir->SetDataScalarType(VTK_FLOAT);
ir->SetDataExtent(0, 580, 0, 580, 0, 500);

ir->SetDataOrigin(0, 0, 0);
ir->SetDataSpacing(1, 1, 1);
ir->SetHeaderSize(0); // no header
ir->SetNumberOfScalarComponents(1);
ir->SwapBytesOff();
ir->SetFileLowerLeft(1);
ir->SetOutput(img);

ir->Update();

ir->Delete();
img->Delete();
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Explanation and approach to a problem:

I’m trying to load a large volume (> 640 MB), but operating system fails to allocate enough memory in the function vtkDataArrayTemplate<T>::Allocate(vtkIdType sz, vtkIdType) (file: vtkDataArrayTemplate.txx), so it leads to a following error massege:

ERROR: In d:\work\libs\vtk\5_1_0\source\common\vtkDataArrayTemplate.txx, line 133
vtkFloatArray (02736950): Unable to allocate 168200000 elements of size 4 bytes.

This behavior is OK! The problem is the next step: despite of the false allocation the vtkImageReader tries to load the volume and make an access to null pointer -> this leads to a crash.
Let us take a close look at the function vtkImageReader::ExecuteData(vtkDataObject *output) in the file vtkImageReader.cxx. The error message is produced during the call in the first line of the function:

vtkImageData *data = this->AllocateOutputData(output);

After this line I would place a check block for a successful memory allocation, something like this:

if (!data->GetScalarPointer())
{
  return;
}
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  Notes
(0036966)
Kitware Robot (administrator)
2016-08-12 09:54

 Resolving issue as `moved`.

This issue tracker is no longer used. Further discussion of this issue may take place in the current VTK Issues page linked in the banner at the top of this page.

 Issue History
Date Modified Username Field Change
2008-04-08 09:30 Levap New Issue
2011-06-16 13:11 Zack Galbreath Category => (No Category)
2016-08-12 09:54 Kitware Robot Note Added: 0036966
2016-08-12 09:54 Kitware Robot Status expired => closed
2016-08-12 09:54 Kitware Robot Resolution open => moved
2016-08-12 09:54 Kitware Robot Assigned To => Kitware Robot

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