Re: Segmentation Fault

[geert@gonzo.sun3.iaf.nl (Charlie Root)]

William Paul Berriss (W.P.Berriss@reading.ac.uk) wrote:
   When I change the 64X64X64 to a 128X128X128 they both crash at
   run-time giving Segmentation Fault.

   Thus I cannot ask for a 6 megabyte chunk of memory on
   a Sun.  
   	Is this correct?  Why?

It may be that you do not allocate the memory dynamically
using "new", but implicitly declaring a local variable 
for example. In that case it typically is allocated on the
stack, which should be large enough. 

Use the Storage_Size pragma for the task that allocates
these large chunks of memory, setting the size to 30 MB
for example. On most modern systems having a large stack
doesn't hurt as long as you do not touch it. So the memory
is only actually needed when you *use* the whole stack.

I do think however that Ada compilers should provide
larger stacks by default on platforms as described above.
Bob Duff recently described a good approach for this,
without requiring too much virtual address space.

Regards,
   Geert