You can use the heap profiling options in GHC to find out what is using all the memory.  You'll want to compile with -prof and -rtsopts, and then invoke the program with +RTS -h<x>, where <x> is one of 'c', 'y', or a few others.  Then run hp2ps on the resulting .hp file to get a graph of what's using all the memory.

--
Chris Smith

On Jul 4, 2011 9:46 AM, "Logo Logo" <saraslogo@gmail.com> wrote:
> Hi,
>
> For the following error:
>
> Stack space overflow: current size 8388608 bytes.
> Use `+RTS -Ksize -RTS' to increase it.
>
> I want to find out the culprit function and rewrite it tail-recursively. Is
> there a way to find out which function is causing this error other
> than reviewing the code manually?
>
> Thanks,
> Loganathan