Path: utzoo!attcan!uunet!cs.utexas.edu!usc!apple!portal!cup.portal.com!pgl
From: pgl@cup.portal.com (Peter G Ludemann)
Newsgroups: comp.lang.prolog
Subject: Re: GC triggering and stack limit checking by MMU hardware
Message-ID: <31903@cup.portal.com>
Date: 20 Jul 90 01:38:54 GMT
References: <1990Jul19.151524.22544@diku.dk>
Organization: The Portal System (TM)
Lines: 10

IBM-Prolog has used the memory-trap technique for local and
global stack overflow since 1985 or so.  An addressing exception
triggers garbage collection.

The scheme is completely general; the error-catch mechanism
can even catch stack overflow errors and do something reasonable
with them (for example, I use this as a way of trapping left
recursion in a grammar-rule interpreter).

- peter ludemann	(usual disclaimer)