Re: segfault with large-ish array with GNAT

[jonathan <johnscpg@googlemail.com>]

On Mar 17, 7:21 pm, Jerry <lancebo...@qwest.net> wrote:
> The following program produces a segmentation fault when run with the
> array size set to 1_048_343 but not when it is set to 1_048_342.
> What's going on and how do I fix it? If I put in a bit of text IO the
> allowed array size is some what smaller.
>
> GNATMAKE 4.4.0 20080314 (experimental) [trunk revision 133226]
> OS X 10.5.8
> 4 GB RAM
>
> procedure bomb is
>     type Float_Array_Type is array (Integer range <>) of Long_Float;
>     -- 1_048_343 causes segmentation fault, 1_048_342  does not.
>     x : Float_Array_Type(1 .. 1_048_343);
> begin
>     x(1) := 1.0;
> end bomb;
>
> Jerry

Have you tried setting the stacksize in your shell.  In bash the
command is

ulimit -s unlimited

in csh, (I seem to recall):

limit stacksize unlimited

Type ulimit or limit to see what the defaults are.
When I do it on Debian Linux, your program I get arrays up to
2 Gigabyte in size.

HTH ...

Jonathan