Re: What's wrong with alloca() ?

wjw@eb.ele.tue.nl (Willem Jan Withagen)
Mon, 23 Dec 91 10:38:27 +0100

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Related articles
What's wrong with alloca() ? preston@dawn.cs.rice.edu (1991-12-19)
Re: What's wrong with alloca() ? apang@mindlink.bc.ca (1991-12-15)
Re: What's wrong with alloca() ? pardo@cs.washington.edu (1991-12-21)
Re: What's wrong with alloca() ? preston@dawn.cs.rice.edu (1991-12-22)
Re: What's wrong with alloca() ? wjw@eb.ele.tue.nl (1991-12-23)
Re: What's wrong with alloca() ? David.Chase@Eng.Sun.COM (1991-12-23)
Re: What's wrong with alloca() ? pcg@aber.ac.uk (1991-12-26)
Re: What's wrong with alloca() ? wicklund@intellistor.com (1991-12-30)
Re: What's wrong with alloca() ? wws@renaissance.cray.com (1991-12-30)
Re: What's wrong with alloca() ? jfc@athena.mit.edu (1991-12-31)
Re: What's wrong with alloca() ? GORMAN_B@prime1.lancashire-poly.ac.uk (Barry Gorman) (1992-01-03)
[3 later articles]
| List of all articles for this month |

Newsgroups: comp.compilers
From: wjw@eb.ele.tue.nl (Willem Jan Withagen)
Keywords: C, storage
Organization: Compilers Central
References: 91-12-075
Date: Mon, 23 Dec 91 10:38:27 +0100

In article 91-12-075 you write:
[alloca is useful but has a bad reputation]


I like the call very much, but like John suggests it's a sort of a
nuisance when you need to port to a system where it is not supported.


One should not talk about MessyDos perhaps, since we're all grownups,:-)
but none the less:
Lots of the GNU stuff uses BISON, which uses this method to enlarge it's
pushdown stacks. Now as most off us have experienced is DOS limitted to
64k per item (give or take a compiler), and then BISON gets into trouble.
This because there is already lots and lots on the stack. So I hacked it
to use regular malloc for each of its stacks, giving it a little more
space to breath. And it's not even that difficult. People interested can
email me.


Regards,
Willem Jan Withagen.
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Eindhoven University of Technology DomainName: wjw@eb.ele.tue.nl
Digital Systems Group, Room EH 10.10
P.O. 513 Tel: +31-40-473401
5600 MB Eindhoven The Netherlands
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