[ET Trac] [Einstein Toolkit] #1423: CarpetIOHDF5 corrupts memory when readingi compressed grid structure strings

[Einstein Toolkit]

#1423: CarpetIOHDF5 corrupts memory when readingi compressed grid structure
strings
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 Reporter:  rhaas   |       Owner:  eschnett           
     Type:  defect  |      Status:  new                
 Priority:  major   |   Milestone:                     
Component:  Carpet  |     Version:  development version
 Keywords:          |  
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 Input.cc uses H5Dget_storage_size to determine how much memory to allocate
 for the large string attributes (Paramters and grid structure). However
 this function literally returns the space used on disk which differs from
 the space in memory when compression is used (or when the dataset is
 sparse, or when the datatype on disk is different from that in memory eg
 float vs double).

 The attached patch instead queries the dataspace for the number of points.

 Ok to apply? Is there a preferred way of getting this size othewise?

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1423>
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