Conference hydra::axp-developer

3706.0. "Macneal Schwendler - Point 29639" by KZIN::ASAP () Wed Jun 04 1997 05:41

    Company Name :  Macneal Schwendler - Point 29639
    Contact Name :  martin lees
    Phone        :  +31-182-536444
    Fax          :  +31-182-538418
    Email        :  [email protected]
    Date/Time in :   4-JUN-1997 09:40:54
    Entered by   :  Helen Pratt
    SPE center   :  REO

    Category     :  unix
    OS Version   :  v4
    System H/W   :  


    Brief Description of Problem:
    -----------------------------

From:	RDGENG::MRGATE::"RDGMTS::PMDF::mail.dec.com::Omuiric" 30-MAY-1997 13:35:47.82
To:	RDGENG::ASAP
CC:	
Subj:	ESCALATION: POINT  , Company  TO ASAP READING:      29639

From:	NAME: Ciaran OMuiri <[email protected]@PMDF@INTERNET>
To:	NAME: '[email protected]' <IMCEAX400-c=US+3Ba=+20+3Bp=DIGITAL+3Bo=SBUEURMFG+3Bdda+3ASMTP=asap+40reo+2Emts+2Edec+2Ecom+3B@mail.dec.com@PMDF@INTERNET>

Hello - 

POINT Log Number	29639 
Company Name 
Macneal Schwendler EDC B.V., Groningenweg 6, 2803PV Gouda, The
Netherlands
	
Engineers name	martin lees
Telephone Number : +31-182-536444, 

		
Fax Number	+31-182-538418	
E-mail Address [email protected] 	

Operating System, Version	UNIX V4.0 
Platform Alpha 500/500 			

Problem Statement	
FYI

----------
From: 	Martin Lees[SMTP:[email protected]]
Sent: 	30 May 1997 20:39
To: 	asap_euro
Cc: 	iemke; arthur; peter; annemiek
Subject: 	Decladebug crashes DEc Alpha 500/500

Hello,
We have just purchased an Alpha 500/500 with UNIX V4.0 for porting
purposes
under the ASAP program (membership number A71098).

When using the DECLADEBUG debugger on our program, the entire system
crashes as soon as the RUN command is issued. The problem is repeatable.

This is extermely inconvenient, can you please let me know how we
can prevent the problem from re-occuring.

Regards
martin lees

-- 
Martin Lees, [email protected] Tel: +31-182-536444, Fax:
+31-182-538418
Macneal Schwendler EDC B.V., Groningenweg 6, 2803PV Gouda, The
Netherlands

	






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To:[email protected]
cc:[email protected]
Subject:DECLADEBUG Crashing
--------
Martin,

This is a known problem on Digital UNIX 4.0b.  It occurs when the kernel is
built with KDEBUG setup in the kernel config file, /sys/conf/XXXX where XXXX is
the uppercase system name.

The problem has to do with the kernel variable db_enable.  This is a relatively
new kernel variable, and gets set to 1 when KDEBUG is configured.  You can
resolve the crashes by going into ladebug or dbx as superuser and doing the
following:

dbx -k /vmunix          /* or whatever you are running as the OS */
assign db_enable = 0

and then quit.  This will take care of the current session, but db_enable will
be reset if you have to reboot.  To take care of that:

dbx /vmunix          /* no -k this time, we want the disk version...
patch db_enable = 0

and you'll be set until you need to rebuild the kernel.

If the debugger is functional after this, then the patch you require for a
permanent fix is OSF410-053.  It can be obtained from 

http://www.service.digital.com/html/patch_public.html

Use the search and download utility to locate the proper patch.  Your search
string will be "OSF410-053".

Good luck.
Pat Bryant