core from a running process

[Patrick R. McManus]

gdb 5.2 and up has a "gcore" command.. you can attach to a running
process, type gcore <optional filename for corefile> (which will drop
a corefile), and then detach - all without killing the process.

if interactive gdb scares the customer send them a little file
(cmdfile) that contains 2 lines:

gcore /tmp/mycore
quit

and run it as "gdb -x cmdfile binary pid"




[FRamsay at castelhq.com: Sep 03 09:09]
> Does anyone know of a way to get a core from a running process without
> crashing the process?  I have a process
> that occasionally stops responding but doesn't actually crash.  Worse this
> only happens at one client site and
> I can't reproduce it in the office, so I can't attach dbg to it.  To
> complicate matters the application spawns several
> other processes so I don't know which one is causing the problem :(     So
> does anyone know a very simple way I
> can get core file, and it has to be _very_ simple because I have to talk
> the client through it over the phone.
> 
>                          -fjr
> 
> 
> Frank Ramsay
> Systems Programmer
> Castel, Inc
> 14 Summer St, 3rd Floor
> Malden, MA 02148
> (781) 324-0140 (voice)
> (781) 324-0277 (fax)
> Emal: framsay at castel.com
> 
> 
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