[Developers] memory error in src/main/Parameter.c's GetBaseName()

[David Rideout]

Thanks!  I think I have found the problem.  It is not that the grid
arrays are of size 0, but that I want distrib=constant grid
_functions_.  Cactus seems to just silently ignore my distrib=constant
request.  Shall we add a check for this to the interface.ccl parser?

Cheers,
David

On Fri, Feb 29, 2008 at 6:09 AM, Thomas Radke <tradke at aei.mpg.de> wrote:
>
> David Rideout wrote:
>  > Hi,
>  >
>  > I have a code which runs fine in serial, but seg faults while freeing
>  > grid arrays when run in parallel.  When I run it with memory checking
>  > in ddt, it shows an error at the malloc() call in GetBaseName()
>  > (src/main/Parameters.c line 2374):
>  >
>  > Processes 0-1:
>  > Memory error detected: "a previous write overwrote the reserved memory
>  > after the end of a memory allocation"
>  >
>  > This call to GetBaseName() arises from a call to CCTK_ParameterData()
>  > during BASEGRID, to get the size of an array parameter.
>  >
>  > Any ideas??
>
>  I can't see anything wrong in the calling stack CCTK_ParameterData() ->
>  ParameterFind() -> GetBaseName().
>
>  Like Erik, I would suspect a memory corruption earlier in the run. Do
>  your grid arrays maybe have a size of 0 on some processors, and there is
>  code not checking for that ?
>
>  --
>  Cheers, Thomas.
>
>
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