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The Diff 'twix SYSDUMP & CEEDUMP

 
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Miraj Ali Salabudeen

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PostPosted: Tue Mar 09, 2010 11:23 am    Post subject: The Diff 'twix SYSDUMP & CEEDUMP
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What is the defference between SYSDUMP and CEEDUMP? What is an offset value? To where it is used and how?
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Gnanas N

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PostPosted: Tue Mar 09, 2010 11:33 am    Post subject: Re: SYSBUMP & CEEDUMP
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Hi,

Robert Sample wrote:
CEEDUMP is used by Language Environment for a formatted dump when an abend occurs. If the problem is related to an LE condition, this dump can be helpful in debugging the cause of the failure. If the problem is not related to LE, this dump may be misleading.

SYSDUMP is used by the system for dumping when an abend occurs that causes a system dump (hence the DD name). This dump can be very long but will usually identify the cause of the problem -- although it may require an expert in dump reading to identify the cause.

What is SYSBUMP in the title?
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Gnanas N

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PostPosted: Tue Mar 09, 2010 11:59 am    Post subject: Reply to: The Diff 'twix SYSDUMP & CEEDUMP
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Hi,
Quote:
What is an offset value? To where it is used and how
This link (from LE Debugging Guide) explains how to debug COBOL programs (three examples) - Debugging COBOL programs

And there are examples for PL/I and other languages too.
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mmwife

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PostPosted: Sat Mar 13, 2010 9:01 pm    Post subject:
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Hi Miraj,

In the context of dump reading, "offset" is the number of bytes from the beginning of the module to the assembler instruction that caused the abend.

This allows you to go to your compiler listing (provided you selected the compiler options "LIST,NOOFF") and find the offending instruction in the pgm.

The above applies to modules executed directly from the JCL EXEC stmt and dynamically CALLed modules.

If the abend occurred in a "statically" CALLed module the process is a little more complicated, but we'll leave that discussion for another time.
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Kjeld

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PostPosted: Tue Mar 16, 2010 6:19 pm    Post subject:
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What is an offset value? To where it is used and how?

Offset is more generally the displacement from a base address in storage where a given position of executable code, or piece af data is located.

The working storage of your modules is also organised this way, with Base Locator (BL) cells that specify the origin, and each variable is mapped with an offset to the BL address value. Dump routines will sometimes list absolute adresses, and sometimes list the base value, and storage with offset addresses, depending on configuration of dump tools.

To get the absolute address, you should add the base locator value and the offset value. Here a calculator with hexadecimal capability come in handy.
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PeterHolland

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PostPosted: Tue Mar 16, 2010 7:20 pm    Post subject:
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SYSDUMP is unknown to me, or it has to be used in an ABEND exit routine.
SYSUDUMP/SYSABEND were the ones i was confronted with in this life.
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dick scherrer

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PostPosted: Tue Mar 16, 2010 9:06 pm    Post subject:
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Hello,

Quote:
Here a calculator with hexadecimal capability come in handy.
The good news is that one no longer needs a TI (Texas Instruments) Programmer. . . icon_smile.gif

A hex calculator is built into Windows Accessories icon_cool.gif
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PeterHolland

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PostPosted: Tue Mar 16, 2010 9:11 pm    Post subject:
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Quote:

The good news is that one no longer needs a TI (Texas Instruments) Programmer. . .

A hex calculator is built into Windows Accessories


All those gadgets, a real man still does the hex/dec (etc)
conversions manually.
Takes some time, but then you know you have accomplished
something.
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Kjeld

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PostPosted: Wed Mar 17, 2010 1:31 pm    Post subject:
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Time to pull out the S/370 Reference Summary Card to decipher which instruction triggered the exception.... icon_cool.gif
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PeterHolland

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PostPosted: Wed Mar 17, 2010 1:47 pm    Post subject:
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As we speak im just reading again that wonderfull CE Handbook :

OS/VS2 System Programming Library : Debugging Handbook

Last update : September 30, 1974

A real collectors item
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Terry Heinze

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PostPosted: Wed Mar 17, 2010 8:20 pm    Post subject:
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Kjeld wrote:
Time to pull out the S/370 Reference Summary Card to decipher which instruction triggered the exception.... icon_cool.gif
Would that be the yellow booklet or the green card? icon_lol.gif
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dick scherrer

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PostPosted: Wed Mar 17, 2010 9:43 pm    Post subject:
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Hello,

As i recall, the s/360 reference was the "green card". . .

Before the s/370 booklet, there was a "yellow card" as well. . . Then the "stuff" to be included outgrew "the card".
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PeterHolland

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PostPosted: Wed Mar 17, 2010 10:16 pm    Post subject:
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Quote:

"green card"


Thats for getting a permit to stay in the America's?

There is a nice movie about that :

http://www.imdb.com/title/tt0099699/
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Terry Heinze

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PostPosted: Thu Mar 18, 2010 3:35 am    Post subject:
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Nope; I was referring to the one Dick mentioned. icon_smile.gif
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Kjeld

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PostPosted: Thu Mar 18, 2010 2:28 pm    Post subject:
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Terry Heinze wrote:
Kjeld wrote:
Time to pull out the S/370 Reference Summary Card to decipher which instruction triggered the exception.... icon_cool.gif
Would that be the yellow booklet or the green card? icon_lol.gif

I have a yellow card 4th edition Nov. 1976 (form GX20-1850-3) and a yellow booklet, 7th edition July 1986 (form GX20-1850-6). 5th edition, Oct. 1981 is also a yellow booklet. The green cards were earlier then, that is the S/360 cards, as Dick stated. icon_smile.gif

I found a collection here.
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