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Re: [cdt-dev] DSF gdb: Unresolved breakpoint freezes application
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Hi Marc,
I don't want to ruin your day but I have found another bug in the DSF
implementation that causes an application freeze during debugging. I have
opened bug #316060 https://bugs.eclipse.org/bugs/show_bug.cgi?id=316060 about
this. You need the Qt library source code to reproduce the bug. Unfortunately,
I was not able to get a simpler test case. I f you need any help for testing
then please contact me.
Axel
> Most credit for Pawel, who suggested a much nicer solution
> using DSF's Sequence RollBack feature.
>
> Axel, I'm glad you found this before the release!
>
> Thanks
>
> > -----Original Message-----
> > From: cdt-dev-bounces@xxxxxxxxxxx
> > [mailto:cdt-dev-bounces@xxxxxxxxxxx] On Behalf Of Axel Müller
> > Sent: Friday, May 28, 2010 3:12 PM
> > To: CDT General developers list.
> > Subject: Re: [cdt-dev] DSF gdb: Unresolved breakpoint freezes
> > application
> >
> > Wow, you're really fast Marc. I just wanted to apply your
> > first patch but then
> > my CVS update was faster! And the best thing: the bug is
> > fixed. I just tried.
> > Thanks a lot.
> >
> > Axel
> > >
> > > I've posted a prototype fix to the bug. If you want to
> >
> > give it a spin.
> >
> > > But I do have to run more tests on it.
> > >
> > > > The bug is much worse. It seems that whenever gdb gives
> >
> > an error DSF-GDB
> >
> > > > does not recover. I just stumbled across this while
> >
> > stepping through
> >
> > > > some code with Qt: 354,429 49-data-evaluate-expression --thread 1
> > > > --frame 0 QString 354,431 49^error,msg="cannot resolve
> >
> > overloaded method
> >
> > > > `QString': no arguments supplied"
> > >
> > > If you can still see the above with the patch I posted,
> >
> > pleasepost the full
> >
> > > traces to the bug and how you got there. It must be that
> >
> > DSF-GDB was in a
> >
> > > bad state because of the breakpoint problem, so the patch
> >
> > should fix this
> >
> > > too.
> > >
> > > Thanks
> > >
> > > Marc
> > > ________________________________________
> > > From: cdt-dev-bounces@xxxxxxxxxxx
> >
> > [cdt-dev-bounces@xxxxxxxxxxx] On Behalf
> >
> > > Of Axel Müller [aegges@xxxxxx] Sent: May 28, 2010 5:58 AM
> > > To: CDT General developers list.
> > > Subject: RE: [cdt-dev] DSF gdb: Unresolved breakpoint
> >
> > freezes application
> >
> > > The bug is much worse. It seems that whenever gdb gives an
> >
> > error DSF-GDB
> >
> > > does not recover. I just stumbled across this while
> >
> > stepping through some
> >
> > > code with Qt: 354,429 49-data-evaluate-expression --thread
> >
> > 1 --frame 0
> >
> > > QString
> > > 354,431 49^error,msg="cannot resolve overloaded method `QString': no
> > > arguments supplied"
> > >
> > >
> > > After this nothing works anymore.
> > >
> > > Axel
> > > >
> > > >My fault. When adding support for setting a breakpoint
> >
> > while the target
> >
> > > >is running https://bugs.eclipse.org/bugs/show_bug.cgi?id=242943
> > > >
> > > >I forgot the fact that the breakpoint installation can
> >
> > 'fail' in cases
> >
> > > >where the file is not part of the program, so DSF-GDB does
> >
> > not recover
> >
> > > >well.
> > > >
> > > >
> > > >
> > > >I'll post a fix to the bug you opened.
> > > >
> > > >
> > > >
> > > >Thanks for finding this.
> > > >
> > > >
> > > >
> > > >Marc
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >________________________________________
> > > >
> > > >From: cdt-dev-bounces@xxxxxxxxxxx
> >
> > [cdt-dev-bounces@xxxxxxxxxxx] On Behalf
> >
> > > >Of Axel Müller [aegges@xxxxxx]
> > > >
> > > >Sent: May 28, 2010 3:40 AM
> > > >
> > > >To: cdt-dev@xxxxxxxxxxx
> > > >
> > > >Subject: [cdt-dev] DSF gdb: Unresolved breakpoint freezes
> >
> > application
> >
> > > >Hi,
> > > >
> > > >
> > > >
> > > >I found IMHO a serious bug in the gdb backend of DSF (see
> > > >https://bugs.eclipse.org/bugs/show_bug.cgi?id=314628).
> >
> > When I create a
> >
> > > >breakpoint in a source file that does not belong to the
> >
> > application that
> >
> > > >is currently debugged gdb will report an error and remain
> >
> > in some kind of
> >
> > > >freeze state. The application freezes as well.
> > > >
> > > >
> > > >
> > > >I have attached a simple test case projectto the bug report to
> > > >demonstrate the bug. I would be happy if someone could
> >
> > have a look at it.
> >
> > > >In my opinion this bug makes it impossible to debug more than one
> > > >application at once. A not uncommon scenario in Makefile projects.
> > > >
> > > > Axel
> > > >
> > > >___________________________________________________________
> > > >
> > > >NEU: WEB.DE DSL für 19,99 EUR/mtl. und ohne Mindest-Laufzeit!
> > > >
> > > >http://produkte.web.de/go/02/
> > > >
> > > >_______________________________________________
> > > >
> > > >cdt-dev mailing list
> > > >
> > > >cdt-dev@xxxxxxxxxxx
> > >
> > >https://dev.eclipse.org/mailman/listinfo/cdt-dev_____________
> >
> > _____________
> >
> > > >_____________________
> > > >
> > > >cdt-dev mailing list
> > > >
> > > >cdt-dev@xxxxxxxxxxx
> > > >
> > > >https://dev.eclipse.org/mailman/listinfo/cdt-dev354,429
> > > >49-data-evaluate-expression --thread 1 --frame 0 QString
> > >
> > > 354,431 49^error,msg="cannot resolve overloaded method `QString': no
> > > arguments supplied"354,429 49-data-evaluate-expression
> >
> > --thread 1 --frame
> >
> > > 0 QString 354,431 49^error,msg="cannot resolve overloaded method
> > > `QString': no arguments supplied" 354,429
> >
> > 49-data-evaluate-expression
> >
> > > --thread 1 --frame 0 QString
> > > 354,431 49^error,msg="cannot resolve overloaded method `QString': no
> > > arguments supplied"
> > > ___________________________________________________________
> > > GRATIS für alle WEB.DE Nutzer: Die maxdome Movie-FLAT!
> > > Jetzt freischalten unter http://movieflat.web.de
> > > _______________________________________________
> > > cdt-dev mailing list
> > > cdt-dev@xxxxxxxxxxx
> >
> > https://dev.eclipse.org/mailman/listinfo/cdt-dev______________
> > _____________
> >
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> >
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>
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