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Full Discussion: Using gdb, ignore beginning segmentation fault until reproduce environment segmentation fault
Top Forums Programming Using gdb, ignore beginning segmentation fault until reproduce environment segmentation fault Post 302714765 by DGPickett on Friday 12th of October 2012 03:05:21 PM
Old 10-12-2012
Watchdog scripts should move the core file before restarting. I like compressing it into a file with the date-time in another directory, perhaps /tmp so they get cleaned up if they get too large.

Beyond that, I like to scan for core on prod and dev boxes, ls -l it, copy it to /tmp/core.YYYY-MMDD-HHMMSS so it is not overwritten, automatically locate the main code using 'file' and common PATHs, run gdb for a stack trace (where), sending an email to the group with as much info as I could get, so they know one side effect of their activities is this core dump, which might be missed otherwise. Then I compress it in the background and sleep a second to ensure unique naming. A marker file keeps track of my last scan time, so I do not pick up the same files over and over.

But then, I am more into diagnosis by post mortem than running in debug mode. I am not sure what the environment has to do the the SEGV, that is usually a programmer with too much trust of his inputs.
 

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LEARN ABOUT DEBIAN

gcore

gcore(1)							     GNU Tools								  gcore(1)

NAME

       gcore - Generate a core file for a running process

SYNOPSIS

       gcore [-o filename] pid

DESCRIPTION

       gcore generates a core file for the process specified by its process ID, pid. By default, the core file is written to core.pid, in the cur-
       rent directory.

       -o filename
	      write core file to filename instead of core.pid

COPYING

       Copyright (C) 2003, 2005, 2007, 2008 Free Software Foundation, Inc.

       Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this  permission  notice  are
       preserved on all copies.

       Permission is granted to copy and distribute modified versions of  this manual under the conditions for verbatim copying, provided that the
       entire resulting derived work is distributed under the terms of a permission notice identical to this one.

       Permission is granted to copy and distribute translations of this manual into another language, under the  above  conditions  for  modified
       versions,  except  that	this  permission notice may be included in translations approved by the Free Software Foundation instead of in the
       original English.

SEE ALSO

       gdb(1), core(5)

gdb 6.8 							     May 2007								  gcore(1)
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