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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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GZEXE(1)						      General Commands Manual							  GZEXE(1)

NAME
gzexe - compress executable files in place SYNOPSIS
gzexe name ... DESCRIPTION
The gzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a penalty in performance). For example if you execute ``gzexe /usr/bin/gdb'' it will create the following two files: -rwxr-xr-x 1 root root 1026675 Jun 7 13:53 /usr/bin/gdb -rwxr-xr-x 1 root root 2304524 May 30 13:02 /usr/bin/gdb~ /usr/bin/gdb~ is the original file and /usr/bin/gdb is the self-uncompressing executable file. You can remove /usr/bin/gdb~ once you are sure that /usr/bin/gdb works properly. This utility is most useful on systems with very small disks. OPTIONS
-d Decompress the given executables instead of compressing them. SEE ALSO
gzip(1), znew(1), zmore(1), zcmp(1), zforce(1) CAVEATS
The compressed executable is a shell script. This may create some security holes. In particular, the compressed executable relies on the PATH environment variable to find gzip and some standard utilities (basename, chmod, ln, mkdir, mktemp, rm, sleep, and tail). BUGS
gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases, using chmod or chown. GZEXE(1)
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