At 15:39 -0400 on 09/20/2010, Jim Mulder wrote about Re: FYI:
SYSEVENT REQFASD on z/OS 1.12 needs a larger work :
IBM Mainframe Assembler List <[email protected]> wrote on
09/19/2010 09:59:08 AM:
>:>As I understand it, APAR OA33666 changes the work area size
requirements in
>:>REQFASD back to the original size.
>
>One wonders why there isn't is a version field to control the output
and thus
>the work area length.
I was going to make the same comment. There are a number of other
macros which have such a version field to indicate the mapping of the
> parm fields etc. The code can thus do fall-back if it is presented
> with a "downlevel" parm. The problem is that there is no such field
in the parm list now so it would be hard to introduce it at this
point.
The length field (RASDLEN) has been used in prior releases to
compatibly extend the area in which data is returned to the requestor.
However, RASDLEN includes some internal working storage as well as
the area in which data is returned. If an increase in
internal working storage is required to process requests which
were formerly be processed with a smaller amount, this cannot
be done compatibly. About the best that could be done in that
case would be to fail the request with a return code of 8,
which is documented to mean
"The parameter list is too small."
That would be incompatible, but at least not destructive.
This would met my "The code can thus do fall-back if it is presented
with a "downlevel" parm." criteria. My question on your reply is how
would the code know that the RASDLEN is too small? It was my
impression that the issue was that a work area was being allocated
and was too short and thus there was an overlay beyond the end of the
short workarea and that there was no indication in the parms of the
length of that workarea.
Fortunately, it appears from the APAR text that some
method was found to avoid requiring the increase to
the internal working storage supplied by the user.
This of course solves the issue and makes the problem moot.
Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY
