IBM Mainframe Discussion List <[email protected]> wrote on 06/09/2015 07:26:21:
> From: "[email protected]" <[email protected]> > > Plus when you're displaying register contents or stack traces, the > > addresses are displayed as links. > IPCS has been doing that since I started working with it. Use %, ? > and (forgot the 64bit-address character) when displaying active > storage. Equate some address with a symbol, and you can list it > using the symbolic name. IPCS automatically gives you a lot of > symbols, generated when the dump is initialized. I know, but how do you go back to where you were? Say you're following a chain of linked addresses and you want to go back. Typing in stuff to remember the addresses would be a pain. Web browsers give you all that for free. > A tool to more easily read a java dump is a good thing. Back when we > had a lot of problems with our problem being queued from component > to component because nobody had a clue, I asked IBM for something to > help analyze a java dump from inside an sdump. Was told in no > uncertain terms that nothing like this exists. I don't think that > the tool described by David is much help when analyzing a system > problem, though. Knowledge of what goes on in z/OS and a good tool > (IPCS) to ask a dump good questions are what's required, IMO. > > Barbara Well that's odd because back in the days when I worked on Java for z/OS, I wrote the code to extract a java heapdump from an sdump. Way out of date but you can still find references to "java -cp svcdump.jar com.ibm.zebedee.commands.Convert" here: https://publib.boulder.ibm.com/httpserv/cookbook/Operating_Systems-zOS.html . The modern way to do that is using jdmpview, see https://www-01.ibm.com/support/knowledgecenter/SSYKE2_7.0.0/com.ibm.java.lnx.70.doc/diag/tools/dump_viewer_dtfjview/dump_viewer_commands.html . Oh, and besides not liking IPCS, the other reason I wrote sdump analysis software in Java was that about 15 years ago someone had written a Rexx script to extract useful info from a dump using IPCS but in some cases it would take about 24 hours to run! Cheers, Dave Griffiths IBM Operational Decision Manager z/OS Developer IBM United Kingdom Limited, Hursley Park, Winchester, SO21 2JN, UK Tel: +44 1962 816478 Mobile: 07590 195531 [email protected] Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
