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Path: utzoo!yetti!geac!daveb
From: daveb@geac.UUCP
Newsgroups: comp.unix.questions
Subject: Re: debugging incremental loaded executables
Message-ID: <1626@geac.UUCP>
Date: Sat, 17-Oct-87 15:52:26 EDT
Article-I.D.: geac.1626
Posted: Sat Oct 17 15:52:26 1987
Date-Received: Sun, 18-Oct-87 13:40:00 EDT
References: <427@swivax.UUCP>
Reply-To: daveb@geac.UUCP (Dave Collier-Brown)
Organization: The little blue rock next to that twinkly star.
Lines: 31
Summary: Offer us a starting point, please.

In article <427@swivax.UUCP> jan@swivax.UUCP (Jan Wielemaker) writes:
>...dynamically add new classes to  the  object  oriented  part  by  writing
>C-code,  compiling  this  into object files and then load these into the
>running PCE process.   This  is  done  by  calling  'ld'  to  create  an
>incremental  executable  with  some base address, loading the executable
>and resolving the  entry  points.   This  feature  is  mainly  used  for
>prototyping classes.
>
>Problem is that on an error 'adb' doesn't understand the  core  file  as
>the  symbol  table  is  incomplete.   The  symbol  table  of the created
>executable is complete, but as the text of this file is  incomplete  adb
>still  refuses to produce a stack trace.  (The system is running on SUN,
>under SunUnix 3.2).

  I (and, I suspect, several other people) would be happy to munge
around in incremental loaded-programs if we could get incremental
loading to work properly....
  If memory serves, someone asked for experiences with ld in
creating incremental loadables about a week ago.

  Would you be so kind as to write us a paragraph or two on using
the incremental loading feature, and include an example?  I suspect
if others could get started, they might help with some of the
adb/dbx problems.

 --dave (GCOS is alive, well and living on the Riviera) c-b
-- 
 David Collier-Brown.                 {mnetor|yetti|utgpu}!geac!daveb
 Geac Computers International Inc.,   |  Computer Science loses its
 350 Steelcase Road,Markham, Ontario, |  memory (if not its mind)
 CANADA, L3R 1B3 (416) 475-0525 x3279 |  every 6 months.