Wayne, I ran a test on both z/OS 1.9 and z/OS 1.10 using the following code and
on 1.9 the area was initialized to zeroes and on 1.10 it wasn't:
L R6,=F'1000'
GETMAIN R,LV=(6)
LTR R15,R15
BNZ GETERR
LR R4,R1 * PUT IN WORKREG
LA R5,100(R4)
********************* BEGIN SNAP ROUTINE
OPEN (SNAP,OUTPUT)
SNAP DCB=SNAP,PDATA=REGS,ALL,STORAGE=((R4),(R5))
Jon L. Veilleux
[EMAIL PROTECTED]
(860) 636-2683
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of
Wayne Driscoll
Sent: Friday, November 21, 2008 11:54 AM
To: [email protected]
Subject: Re: z/OS upgrade
GETMAIN has never cleared storage. STORAGE OBTAIN will clear storage to hex
ZEROS ONLY for a 8k or larger request, or a 4k or larger with BNDRY=PAGE.
This behavior has been constant for all releases of MVS/ESA, OS/390 and z/OS I
have worked with since STORAGE was introduced.
Wayne Driscoll
Product Developer
NOTE: All opinions are strictly my own.
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of
Veilleux, Jon L
Sent: Friday, November 21, 2008 9:26 AM
To: [email protected]
Subject: Re: z/OS upgrade
Just a warning.
We just had a problem with some vendor's assembler code running on z/OS 1.10.
In short, GETMAIN no longer initializes the GETMAINed area to hex zeroes. There
will be residual data in the GETMAINed area, so, if someone was a lazy coder
and didn't initialize their fields you could have some 'interesting' abends.
Jon
Jon L. Veilleux
[EMAIL PROTECTED]
(860) 636-2683
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Kurt
Eastwood
Sent: Friday, November 21, 2008 10:12 AM
To: [email protected]
Subject: z/OS upgrade
Hello,
Thanks to everyone in advance for your help.
We are running z/OS 1.8 and considering upgrading to z/OS 1.10 by skipping z/OS
1.9 and I have a few questions for the group.
1. Are many people going from 1.8 to 1.10 skipping 1.9?
2. If so, are you finding there are problems skipping 1.9 you wouldn't have had
if you went from 1.8 to 1.9 to 1.10?
3. For those who upgraded from 1.8 to 1.9 did you have many problems?
Any information at all concerning upgrading from 1.8 to either 1.9 or 1.10
would be beneficial so don't hesitate to respond with any comments.
Thanks,
Kurt
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