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Re: [cdt-dev] Possible to use the qtc-debugging-helper (Either DSF/CDI)
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The EDC/TCF/Linux agent talks to gdbserver. The reference TCF agent on Linux and Mac debug directly using the ptrace system call to poke at the target process being debugged, no gdb at all.
On Fri, Apr 9, 2010 at 2:31 PM, Marc-Andre Laperle
<malaperle@xxxxxxxxxxxxx> wrote:
It's a modified GDB 6.3, wouldn't it be possible to create an agent for it? Of course, it wouldn't support fancy features such as pretty printers. I thought EDC on Linux talked with GDB? I don't know much about TCF/EDC...
On 10-04-09 1:45 PM,
Warren.Paul@xxxxxxxxx wrote:
Maybe I'm misunderstanding the main issue, probably because I'm mostly Mac-ignorant. Michael's comment was
"I forgot to mention that I am on "that troublesome platform, OS X", where the only GDB that seems to work is the one from Apple which is like version 6.3 or something like that so using the Python Pretty Printers will not work for this particular platform."
I took this to mean you can't use GDB 7.0 (DSF or CDI) on Mac.
+1 on your call for end-user feedback.
Thanks,
Warren
-----Original Message-----
From: cdt-dev-bounces@xxxxxxxxxxx
[mailto:cdt-dev-bounces@xxxxxxxxxxx] On Behalf Of ext
Marc-Andre Laperle
Sent: Friday, April 09, 2010 12:23 PM
To: CDT General developers list.
Subject: Re: [cdt-dev] Possible to use the
qtc-debugging-helper (Either DSF/CDI)
I could give the TCF agent a shot for 7.1/8.0, but I feel that
contributing to a third debugger will be counter productive. I
want to help with what's best for the users. DSF-GDB works
well on Mac with version 7.0 and CDI is also pretty good so I
think it's tempting to maintain it for a while. What's the
plan for EDC? Would it replace DSF-GDB as the primary debugger
some day? Would a Mac agent benefit a product outside CDT ?
I'm trying to prioritize here.
Speaking of prioritizing, I think CDT 7.1/8.0 needs a clear
plan early on. If CDT wants to be an end-user IDE, it has to
bring back a balance between the what the companies and
end-users want. The summit will be great for CDT as a platform
but there should be more input from end-users. A mailing list
and bugzilla are hardly a good place for user input. I think a
poll on the CDT site would be a good start. It could be
advertised on Doug's blog (Planet Eclipse exposure) and Twitter, etc.
It could be something like this:
"What would you like to be the focus in the next major CDT release?
Select up to 3 items.
-Improvements to the UI, usability and user documentation
-Integration with other build systems -Integration with other
compilers and debuggers -More Refactorings and Source
generation -More debugging features -Improvements to the build
system -Improvements to the editor and source navigation
-General bug fixes -More code analysis -Better APIs for CDT
vendors -Better documentation in CDT code -Better performance
-Better stability
Please add some details to what you selected. For example, if
you selected 'Integration with other build systems', please
specify which build systems.
<a text area>"
What do you think?
Marc-Andre
On 10-04-09 11:37 AM, Warren.Paul@xxxxxxxxx wrote:
As I said, our team will add Qt support to the EDC
formatter, so the only missing piece for you then would be the
Mac TCF agent. I'm not sure if anyone has considered writing
such an agent yet or not, but this is probably the right forum
to ask the question. :) I'm not a Mac guy so I can't say how
much work that would be, but if the OS has any debug support
(run control, memory/register access, breakpoints, etc), it
shouldn't be too much effort.
Thanks,
Warren
-----Original Message-----
From: cdt-dev-bounces@xxxxxxxxxxx
[mailto:cdt-dev-bounces@xxxxxxxxxxx] On Behalf Of ext
Michael Jackson
Sent: Friday, April 09, 2010 10:06 AM
To: CDT General developers list.
Subject: Re: [cdt-dev] Possible to use the qtc-debugging-helper
(Either DSF/CDI)
Thanks for the info. At _some_ level it would seem to be
possible to
add the functionality (even if it is a plugin of some
kind). It would
seem that the qtc-debugging-helper library sends back a
response to a
gdb request for the "value"
or maybe the QtCreator gdb wrapper figures out that the
user wants to
look at a QString and then asks the library to dump the values and
such based on the pointer? Dunno. Can't really follow along. I may
inquire on the QtCreator Mailing list garner some more info.
--
Mike Jackson<www.bluequartz.net>
On Apr 9, 2010, at 10:36 AM,<Warren.Paul@xxxxxxxxx> wrote:
We've designed a powerful variable formatter in EDC which does the
basics like being able to change the display in the details
pain, but
also optionally allowing the children of the variable to be
changed as
well. It also will allow (not fully implemented yet)
modifying the
value in formatted form. We will have support for Qt
types in this
solution (also not yet implemented).
Unfortunately I don't think this does much to help you out
since EDC
doesn't currently work on Mac, only Windows and Linux. It
would be
great to have someone do a TCF debug agent on Mac though.
:) Maybe
you can focus your time on that and we'll provide the Qt
formatting
aspect?
I should mention that we really wanted to and tried to make this
feature non-EDC specific, but there were some technically
reasons why
it wouldn't work that I can't recall right now. :) It may be that
only some of it is EDC specific, I'm not sure. David Dubrow might
chime in if he's listening.
Thanks,
Warren
-----Original Message-----
From: cdt-dev-bounces@xxxxxxxxxxx
[mailto:cdt-dev-bounces@xxxxxxxxxxx] On Behalf Of ext
Michael Jackson
Sent: Friday, April 09, 2010 9:20 AM
To: CDT General developers list.
Subject: Re: [cdt-dev] Possible to use the qtc-debugging-helper
(Either DSF/CDI)
I forgot to mention that I am on "that troublesome platform, OS X"
where the only GDB that seems to work is the one from Apple
which is
like version 6.3 or something like that so using the
Python Pretty
Printers will not work for this particular platform.
Now obviously since QtCreator does this sort of thing DSF
GDB should
be able to be made to do it also. I just have absolutely NO idea
where I would start looking. Even a hacked together proof
of concept
would motivate me to spend some late nights getting something
together.
--
Mike Jackson<www.bluequartz.net>
On Apr 9, 2010, at 10:13 AM, Elmenthaler, Jens wrote:
If you use gdb, you might want to check the python
pretty printers
being supported by gdb 7.0 and later.
It effectively means to translate your qtc-debugging-helper
library to
python pretty printers, but this might be valuable anyway.
Both gdb integrations (DSF GDB would require the
upcoming CDT 7.0)
have basic support for the pretty printers. Basic support
means the
info provided by the pretty printers appears in the
details pane of
variables and expressions view. But the children and
variables are not
the ones provided by the pretty printers.
I'm working on fully enabling them in the variables and
expressions
view (bug302121). That, however, will only work in DSF GDB.
Jens.
-----Original Message-----
From: cdt-dev-bounces@xxxxxxxxxxx [mailto:cdt-dev-
bounces@xxxxxxxxxxx] On Behalf Of Michael Jackson
Sent: Freitag, 9. April 2010 16:04
To: CDT General developers list.
Subject: [cdt-dev] Possible to use the
qtc-debugging-helper (Either
DSF/CDI)
I do a bunch of Qt programming and I prefer to use
Eclipse CDT to
do my programming. The major hurdle that I have currently
is trying
to
debug Qt based code. Due to the design of the Qt classes when
trying to get the "value" of things like a QString gdb will just
send back a
pointer address that isn't really helpful. With Qt-Creator the
engineers at Nokia have implemented the qtc-debugging-helper
library which your project can link against.
What I was wondering would be what type of code
updates to CDT
(Either in CDI or DSF) would have to go into place in oder to
effectively use the code contained in the qtc-debugging-helper
library? Looking through the qtc-debugging-helper library
it seems
there are "pretty-printers" for the Qt Classes which
can then be
piped back to the IDE making the request to display
more helpful
values of a class rather then the internal pointer.
I am motivated enough to start hacking in CDT to at least
figure out if this type of thing is even possible. Even better
would be some
help from Nokia to point me in the right direction ;-) ***
Thanks
___________________________________________________________
Mike Jackson www.bluequartz.net
Principal Software Engineer mike.jackson@xxxxxxxxxxxxxx
BlueQuartz Software Dayton, Ohio
*** I know this is basically helping out a rival product
(QtCreator
vs
Eclipse CDT) but I think would still be seen as a
Win-Win for all
parties.
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