Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!wuarchive!decwrl!ucbvax!CS.BU.EDU!encore!jcallen
From: encore!jcallen@CS.BU.EDU (Jerry Callen)
Newsgroups: comp.lang.asm370
Subject: Macro to dump a piece of core and the registers MVS/XA
Message-ID: <8912142300.AA02524@brazos.rice.edu>
Date: 14 Dec 89 22:07:45 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: IBM 370 Assembly Programming Discussion List <ASM370%UCF1VM.BITNET@ricevm1.rice.edu>
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>Under VSE there is a macro called JDUMP which is used to dump a piece of
>core between two specified locations and dump the registers.  It is a
>handy debugger for batch assembler programs.  Now that I'm working on
>MVS/XA I have been pouring over the macro books and have not found an
>equivalent.  Can anybody point me in the right direction?

Look at the SNAP macro. It is, unfortunately, somewhat cumbersome to
use; you also have to set up a DCB for the SNAP to use to write the
dump. The manuals you need are:

        Supervisor Services and Macros (for the SNAP macro)
        Data Administration Macro Reference (for DCB/OPEN/CLOSE macros)

If you are going to be doing any extensive assembler work on MVS/XA you
should get to know the TSO "TEST" command. TEST is an interactive debugger,
and it's actually pretty good (if somewhat limited). It's biggest problem
is that you can't simultaneously be debugging a program and looking at the
source code (unless you either print out the program or use a session
manager). Ugh.

-- Jerry Callen
   jcallen@encore.encore.com