This mail is an automated notification from the bugs tracker
of the project: GNUstep.
/**************************************************************************/
[bugs #4068] Latest Modifications:
Changes by:
Richard Frith-Macdonald <[EMAIL PROTECTED]>
'Date:
Tue 08/24/04 at 08:27 (GMT)
What | Removed | Added
---------------------------------------------------------------------------
Assigned to | CaS | None
/**************************************************************************/
[bugs #4068] Full Item Snapshot:
URL: <http://savannah.gnu.org/bugs/?func=detailitem&item_id=4068>
Project: GNUstep
Submitted by: Stefan Urbanek
On: Sun 06/22/03 at 08:22
Category: Base/Foundation
Severity: 1 - None
Item Group: Change Request
Resolution: Fixed
Privacy: Public
Assigned to: None
Status: In Test
Summary: DO uses typed selector from local instead of distant object.
Original Submission: Distributed Objects in -base uses information about typed
selectors (for building method signatures and invocations) from local runtime instead
of distant object. This is ugly behaviour and causes, for example, segfaults due to
type mismatches or selector nonexistence.
Follow-up Comments
------------------
-------------------------------------------------------
Date: Fri 07/04/03 at 09:40 By: Richard Frith-Macdonald <CaS>
The GNUstep extension to use information from the remote system should now be working
for ffcall and ffi as well as the old mframe forwarding mechanism, at least inasmuch
as it ever makes sense ... if the types that the compiler was expecting in the client
do not match the types in the server then it is of course impossible for the two to
cooperate.
-------------------------------------------------------
Date: Fri 07/04/03 at 08:46 By: Richard Frith-Macdonald <CaS>
After more investigation, it seems it may be possible to work around this problem, so
the modification I suggested earlier to the runtime hook __objc_msg_forward is
probably not actually needed :-)
-------------------------------------------------------
Date: Fri 07/04/03 at 05:58 By: Richard Frith-Macdonald <CaS>
This is nothing to do with the DO system ... it's a feature of the message forwarding
mechanism used (this comes before any DO code can be called). The ffcall and ffi based
forwarding get type information from the local runtime. Turning these off and using
the old mframe code should do as a workaround.
I'm looking into trying to get ffcall and ffi to work, but this may require adding a
new feature to the objc runtime.
-------------------------------------------------------
Date: Sun 06/22/03 at 09:49 By: Stefan Urbanek <stefanu>
Problem is, that DO does not seem to fetch types from remote end, or fetches them and
uses only on one place and there are still places in -base where local selector info
is used.
I'm reffering to my previous email to the list:
http://mail.gnu.org/archive/html/gnustep-dev/2003-06/msg00018.html
Whole problem is described in that post.
If you would like to reproduce it, you have to get older version of StepTalk, because
I have created a workaround for this bug.
-------------------------------------------------------
Date: Sun 06/22/03 at 09:17 By: Richard Frith-Macdonald <CaS>
I'm not sure about this ... DO has to handle arguments both locally and remotely, so
the argument types on both ends of the connection must match
Where there is no type information at the local end, DO fetches it from the remote
end, so the simple assertion that DO uses the local runtime rather than the remote end
is not the case. I think we need more specific examples/testcases of exactly what the
problem is.
I seem to recall an email conversation about an objc-runtime problem with selector
types for forwarding. Is this the same problem in a different guise?
For detailed info, follow this link:
<http://savannah.gnu.org/bugs/?func=detailitem&item_id=4068>
_______________________________________________
Message sent via/by Savannah
http://savannah.gnu.org/
_______________________________________________
Bug-gnustep mailing list
[EMAIL PROTECTED]
http://lists.gnu.org/mailman/listinfo/bug-gnustep
