[developers] itsdb problems

Stephan Oepen oe at csli.Stanford.EDU
Sat Aug 6 01:37:50 CEST 2005

hi frederik,

> I am trying to connect my version of cheap with tsdb, but I end
> up with a message about a segmentation violation in the Lisp
> buffer in Emacs briefly after I start processing sentences.  How
> can I debug it?  (From the command line, the sentences work
> fine, and the grammar seems to load correctly as well.)

here are some debugging techniques for [incr tsdb()] clients that have
been useful for me at times:

  - setting *pvm-debug-p* to t, so as to make the PVM layer log large
    parts of the communication; possibly also trace _process_item, so
    as to see what gets passed off to cheap.  then you could confirm
    that those exact inputs work well interactive.

  - attaching strace(1) or gdb(1) to the cheap process.  then at the
    time the SEGV occurs, you should be able to work out where things

the gdb(1) --pid option can be incredibly useful on background jobs.

                                                    good luck  -  oe

+++ Universitetet i Oslo (ILN); Boks 1102 Blindern; 0317 Oslo; (+47) 2285 7989
+++     CSLI Stanford; Ventura Hall; Stanford, CA 94305; (+1 650) 723 0515
+++       --- oe at csli.stanford.edu; oe at hf.uio.no; stephan at oepen.net ---

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