In <[EMAIL PROTECTED]>, on
11/29/2006
at 04:31 PM, "Craddock, Chris" <[EMAIL PROTECTED]> said:
>As far as MVS (Binder and Contents) is concerned, "reentrant" only
>means that the code does not modify itself. Period.
No; you've been around long enough to know better than that. It goes
into SP252 if the library is authorized, but it is *not* made write
protected. IBM has delivered self modifying code linked as RENT.
Further, putting the code into SP252 is *NOT* the only difference in
the behavior of Program Management (née Contents Supervision.)
>Yes of course it is possible for smart-asses to produce contrived
>examples where a program can modify itself AND exhibit correct
>behavior when used concurrently by more than one task,
But why bother, since IBM has already done the work for us?
>Now can we give this poor ex-equine a decent burial?
Not while it's eating.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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