Re: dspam problem

[Paul Goyette <paul%whooppee.com@localhost>]

On Thu, 26 Mar 2009, Andrew Doran wrote:

> - With SA, processes were by and large single threaded from the perspective
>  of the ptrace() interface, and so ptrace() lacks real thread support.
>
> - Our in-tree gdb was upgraded and lost its NetBSD thread support.
>
> The only way to debug threaded programs is to get a core dump from the
> program. gdb does understand the thread info in ELF core files.

Any hints on how to force it to give a core dump?

Also, would a ktrace on the process be of any value?  It seems to always 
end with:

  2607      2 dspam    CALL  close(7)
  2607      2 dspam    RET   close -1 errno 9 Bad file descriptor
  2607      2 dspam    CALL  close(7)
  2607      2 dspam    RET   close -1 errno 9 Bad file descriptor
  2607      2 dspam    CALL  open(0x7f7ffd5fdc10,0,0x1b6)
  2607      2 dspam    NAMI 
"/var/dspam/data/paul%whooppee.com@localhost/paul%whooppee.com.blocklist@localhost"
  2607      2 dspam    RET   open -1 errno 2 No such file or directory
  2607      2 dspam    PSIG  SIGBUS SIG_DFL: code=SI_USER sent by 
pid=-264183808, uid=32639)
  2607      1 dspam    CSW   stop kernel
  2607      1 dspam    CSW   resume kernel
  2607      1 dspam    RET   __select50 -1 errno 4 Interrupted system 
call
  2607      2 dspam    CSW   stop kernel
  2607      2 dspam    CSW   resume kernel
  2607      2 dspam    CSW   stop kernel
  2607      2 dspam    CSW   resume kernel

The value of the "sent by pid" changes but is always < 0.  A couple of 
the values in hex are 0xFFFFFFFFF000E000 and 0xFFFFFFFFF040E000.


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