From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,8a4455177648cb9e X-Google-Attributes: gid103376,public From: Stuart Palin Subject: Re: Idea: Array Boundary Checks on Write Access Only Date: 1998/06/18 Message-ID: <3588DE63.A3F@gecm.com>#1/1 X-Deja-AN: 363805742 Content-Transfer-Encoding: 7bit References: <35851B64.5BF271C4@cl.cam.ac.uk> <6m8v02$r2l$1@xenon.inbe.net> <3588D738.4BB32E5A@cl.cam.ac.uk> Content-Type: text/plain; charset=us-ascii Organization: GEC-Marconi Avionics Mime-Version: 1.0 Newsgroups: comp.lang.ada Date: 1998-06-18T00:00:00+00:00 List-Id: Markus Kuhn wrote: > > Lieven Marchand wrote: > > About the only commonly used case that most compilers don't handle is > > where you put in the check yourself. > > It would be really neat if Ada compilers would keep track not only of > the declared range of a subtype, but also of the effectively possible > range of Integer variables inside a certain program fragment as part > of the flow analysis. The Praxis Critical Systems work with SPARK has recognised this need for 'shallow-proofs' and they have some very interesting ideas and the tool support to back it up. Try looking at http://www.praxis-cs.co.uk/ -- Stuart Palin Consultant Engineer Flight Systems Division (Rochester) GEC-Marconi Avionics Ltd