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How to get a stack trace on a looping batch job


IBM Mainframe Forums -> ABENDS & Debugging
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txgai1

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Joined: 01 Dec 2023
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PostPosted: Mon Dec 04, 2023 7:53 pm
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Hi,
I have a complex C/C++ program(s) that is looping in batch mode.
If I cancel with dump(CD), I get a dump but it is worthless. It does not have a stack trace.
The question is how can I get CEEDUMP or IPCS dump so I can get the stack trace. (I know how to get a stack trace from a IPCS dump)
With CD a SYSMDUMP and SYSUDUMP both produce a useless text dump.
I do not get a CEEDUMP.

I can set a slip but not really sure where to set it.

Thanks for any help.
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Pedro

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Joined: 01 Sep 2006
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PostPosted: Tue Dec 05, 2023 7:38 pm
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re: produce a useless text dump

I do not know what a text dump is. But sysmdump should produce a binary file that you can look at with IPCS. Your JCL should have a DD statement for SYSMDUMP output file.

If I were in this situation I would add my own trace control blocks where I would store my own breadcrumb information - the starting and stopping of various routines and the like.

And if the dump does not show your trace information, then also add print statements to your program.
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Pedro

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PostPosted: Tue Dec 05, 2023 7:39 pm
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re: "that is looping in batch mode"

Does that mean it is working successfully in a different mode? Please explain.
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txgai1

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PostPosted: Wed Dec 06, 2023 1:52 am
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SYSMDUMP did work.
Thanks you
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Pete Wilson

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Joined: 31 Dec 2009
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PostPosted: Wed Dec 06, 2023 12:48 pm
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Maybe a GFT trace or SLIP trap?
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txgai1

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Joined: 01 Dec 2023
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PostPosted: Wed Dec 06, 2023 4:26 pm
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SYSMDUMP gave me a dump in IPCS format that I can use to get a stack trace.
Thanks you.
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