Reading DUMP.

Mainframe Application Testing, Offline testing and Tools. Xpediter, IBM Debugger.
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RyanFox
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Reading DUMP.

Post by RyanFox » Tue Mar 25, 2014 9:12 pm

Hi,

If I need to learn the reading a "raw" dump - where to start with? (I meant not a formatted dump or so)




William Collins
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Re: Reading DUMP.

Post by William Collins » Tue Mar 25, 2014 9:22 pm

You have the PSW, you have the registers, you have the dump. Everything you need to get started. Application program? System program? Vendor program?




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RyanFox
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Re: Reading DUMP.

Post by RyanFox » Sat Mar 29, 2014 11:30 am

Thanks William.

I know there is Process status word and that will have the address to last instruction but than that is all I know. What to do next? The IBM Documentation is more or less, helpful when you "know" a bit already. I'm just starting with it.

I'd like to start with Application Programs first.



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Robert Sample
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Re: Reading DUMP.

Post by Robert Sample » Sat Mar 29, 2014 5:27 pm

Dump reading is more of an art than a science -- there is no cookbook, step-by-step, approach that anybody can give you to learn how to read a dump. The wide variety of system abends that cause dumps means that a generic approach doesn't work. Your best bet is to get some dumps and figure out what the problem is from the dump.




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RyanFox
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Re: Reading DUMP.

Post by RyanFox » Wed May 21, 2014 2:37 pm

Thanks. This indeed is an art. I'm still stuggling to get a good start on this.



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Anuj Dhawan
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Re: Reading DUMP.

Post by Anuj Dhawan » Wed May 21, 2014 3:04 pm

http://publibz.boulder.ibm.com/cgi-bin/ ... s/ez2dgz50 - The z/OS Diagnosis Bookshelf is a good site to bookmark. If you need to get into the task control blocks, those are mainly in the 6-Volume "MVS Data Areas" books (GA32-0853 through GA32-0858).

On System Trace, you can find out more about it from Jerry Ng’s excellent presentation at the August 2011 SHARE conference:
Share_Anaheim_Systrace.pdf
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Thanks,
Anuj

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RyanFox
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Re: Reading DUMP.

Post by RyanFox » Sun Sep 13, 2015 10:35 am

Thanks.



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