Date: Thu, 15 Jan 1998 10:04:01 +0900 (JST) From: Michael Hancock <michaelh@cet.co.jp> To: Joel Ray Holveck <joelh@gnu.org> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: sharable static arrays? Message-ID: <Pine.SV4.3.95.980115095903.22515A-100000@parkplace.cet.co.jp> In-Reply-To: <199801140430.WAA03884@detlev.UUCP>
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On Tue, 13 Jan 1998, Joel Ray Holveck wrote:
> Are arrays declared const shared across multiple invocations of a
> program?
>
> That is, if I have an array
> const int foo[8192] = {...};
> then will each instance of the invocation separately allocate 16k for
> an array that's never going to change, and exists as it is in the
> executable?
It depends on how it's defined and scoped.
Try different combinations of defining "const int foo" and move them
around your foo.c file. Try these:
Module scope
Function scope
Function scope and defined static
Then run nm on the a.out and look for foo. If there's a big T or little t
in front of it then the storage is in text which is mapped read-only and
shared.
Regards,
Mike Hancock
> Cheers,
> joelh
>
> --
> Joel Ray Holveck - joelh@gnu.org - http://www.wp.com/piquan
> Fourth law of programming:
> Anything that can go wrong wi
> sendmail: segmentation violation - core dumped
>
--
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