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From: jonathan <johnscpg@googlemail.com>
Newsgroups: comp.lang.ada
Subject: Re: segfault with large-ish array with GNAT
Date: Wed, 17 Mar 2010 12:57:12 -0700 (PDT)
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Date: 2010-03-17T12:57:12-07:00
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On Mar 17, 7:21=A0pm, 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
> =A0 =A0 type Float_Array_Type is array (Integer range <>) of Long_Float;
> =A0 =A0 -- 1_048_343 causes segmentation fault, 1_048_342 =A0does not.
> =A0 =A0 x : Float_Array_Type(1 .. 1_048_343);
> begin
> =A0 =A0 x(1) :=3D 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