[GRASS-dev] [GRASS GIS] #2036: Failed watershed analysis on Grass

[GRASS GIS]

#2036: Failed watershed analysis on Grass
--------------------------+-------------------------------------------------
  Reporter:  mehmeto      |       Owner:  grass-dev@…              
      Type:  defect       |      Status:  closed                   
  Priority:  normal       |   Milestone:  6.4.4                    
 Component:  Raster       |     Version:  6.4.2                    
Resolution:  fixed        |    Keywords:  LFS, r.watershed         
  Platform:  MSWindows 7  |         Cpu:  x86-64                   
--------------------------+-------------------------------------------------

Comment(by glynn):

 Replying to [comment:7 hamish]:

 > > ERROR: G_calloc: unable to allocate 4 * 60175190 bytes at main.c:91
 >
 > (devs: should we strip the wingrass binaries in the stable release
 builds? or keep the line number code there for better debugging?)

 Stripping just removes debug symbols; it won't affect the error message,
 which relies upon the G_calloc() etc macros passing `__FILE__` and
 `__LINE__` to the underlying function.

 > > If you calculate 4 * 60175190 bytes = 240700760 which is > 2^31.
 >
 > missed a 0, actually it's 9 times smaller than 2^31. It only wants to
 allocate 241mb RAM

 That's the allocation that fails. But main() allocates 2 such arrays, and
 before that it calls init_vars(), which allocates 2 or 3 CELL arrays and
 between 1 and 4 DCELL arrays. So the actual requirements are N*241 MB
 where N is between 6 and 13. The upper bound comes out at over 3 GB.

 And that's only the allocations which use size_array().

-- 
Ticket URL: <http://trac.osgeo.org/grass/ticket/2036#comment:9>
GRASS GIS <http://grass.osgeo.org>