Chronological Thread 

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> > > Indeed, if you have time, it would be nice if you could have a look at
> > > the problem I am currently facing. Basically, I start OpenCell and go
> > > straight into the COR view. From there, I try to open one or several
> > > CellML files at once. Sometimes, by opening those files, OpenCell will
> > > just crash. No warning, no nothing. gdb seems to think that the
> > > problem is with:
> > >
> > I haven't been able to reproduce this; it could be that your build has
> > an out-of-date object file (dependencies between headers and objects are
> > not automatically generated in OpenCell, so we could be missing some).
> > Does a clean build experience the same problems?
>
> Ok, I have just build the CellML DOM API from scratch, and done the same
> with my COR view branch. From there, I did my usual testing which consists
> of starting OpenCell, switch into the COR view, and then open one or
> several CellML files at a time. From there, if OpenCell doesn't crash, I
> would just close it and start over again. Anyway, I did that several times
> and eventually, I did get OpenCell to crash, so though some object files
> might have been out of date, it would seem that it is not the (whole)
issue
> here.
>
> For information, here is what bt in gdb gives me:
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> (gdb) bt
> #0 0x00000000 in ?? ()
> #1 0xb36e2bbb in x2p::mathml_dom::MathMLApplyElement::QueryInterface
> (this=0xacd2eb8, aIID=@0xb3016290, aInstancePtr=0xbff00c38)
> at ./interfaces/x2pMathML_content_APISPEC.cpp:15722
> #2 0xb300f4c9 in nsCOMPtr_base::assign_from_qi () from
> /home/gry/COR/opencellStage/components/libDataCollector.so
> #3 0xb2fde5f5 in nsCOMPtr (this=0xbff00e78, qi={mRawPtr = 0xacd2ec4}) at
> /home/gry/XULRunner-SDK/include/xpcom/nsCOMPtr.h:645
> #4 0xb2fdfcf8 in RecursivelyAppendCode (aMathML=0xacd2ec4,
> aOutput=@0xbff00f30, aIndent=@0xa7cebe0, flags=1, contextPrec=UNAMBIG,
> aHighlight=0x0) at DataCollector/MathMLInputServices.cpp:769
> #5 0xb2fe3efe in MathMLInputServices::MathMLToInputFormat
(this=0xa7ce488,
> aMathML=0xacd2ec4, aHighlight=0x0, aIndent=@0xa7cebe0,
> aOutput=@0xbff00f30) at DataCollector/MathMLInputServices.cpp:960
> #6 0xb2fd9344 in CellMLInputServices::Math (this=0xa7cebd0,
> aCompName=@0xbff01100, aDOMElement=0xacd7cd4, aOutput=@0xacd2d30,
> aReaction=@0xbff0116a) at DataCollector/CellMLInputServices.cpp:866
> #7 0xb2fdd14f in CellMLInputServices::Component (this=0xa7cebd0,
> aDOMElement=0xacd9b6c, aOutput=@0xacd2d30)
> at DataCollector/CellMLInputServices.cpp:540
> #8 0xb2fdd9de in CellMLInputServices::CellMLToInputFormat
(this=0xa7cebd0,
> aCellML=0xacd2d24, aOutput=@0xacd2d30)
> at DataCollector/CellMLInputServices.cpp:192
> #9 0xb7bee2ed in NS_InvokeByIndex_P () from /home/gry/XULRunner-
> SDK/bin/libxul.so
> #10 0xb747feef in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #11 0xb74854fd in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #12 0xb7f68505 in js_Invoke () from
/home/gry/XULRunner-SDK/bin/libmozjs.so
> #13 0xb7f5cc7e in ?? () from /home/gry/XULRunner-SDK/bin/libmozjs.so
> #14 0xb7f68554 in js_Invoke () from
/home/gry/XULRunner-SDK/bin/libmozjs.so
> #15 0xb747d61d in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #16 0xb7478e1f in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #17 0xb7beee01 in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #18 0xb77302cb in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #19 0xb77307d2 in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #20 0xb77476e1 in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #21 0xb77478a1 in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #22 0xb77480d2 in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #23 0xb788ee5b in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #24 0xb788f93a in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #25 0xb7bee2ed in NS_InvokeByIndex_P () from /home/gry/XULRunner-
> SDK/bin/libxul.so
> #26 0xb747feef in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #27 0xb74854fd in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> #28 0xb7f68505 in js_Invoke () from
/home/gry/XULRunner-SDK/bin/libmozjs.so
> #29 0xb7f5cc7e in ?? () from /home/gry/XULRunner-SDK/bin/libmozjs.so
> #30 0xb7f68554 in js_Invoke () from
/home/gry/XULRunner-SDK/bin/libmozjs.so
> #31 0xb747d61d in ?? () from /home/gry/XULRunner-SDK/bin/libxul.so
> ---Type <return> to continue, or q <return> to quit---
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> This points to the line I mentioned in my previous message, i.e.
>
> nsCOMPtr<mathml_domIMathMLApplyElement> mma(do_QueryInterface(aMathML));

Just for information, it would seem that the above was a red herring. See
http://cellml-opencell.hg.sourceforge.net/hgweb/cellml-opencell/rev/721316a4
1a1b for more information. I have tried several times the functional test I
mentioned earlier, and so far I haven't managed to get OpenCell to crash
while I would definitely have by now using the previous code. So, I am as
confident as I can be that the crash issue has now been fixed (and yes, the
crashes were due to a stupid mistake/oversight of mine!).

Now, I still have a 'problem', not critical in the sense that it doesn't
crash OpenCell, but annoying nonetheless: memory leak. Unfortunately, I am
not clear what could be the cause of those memory leaks. Here is a typical
trace that I got using Valgrind:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
==28349== 620 bytes in 31 blocks are possibly lost in loss record 438 of 716
==28349== at 0x40269EE: operator new(unsigned int)
(vg_replace_malloc.c:224)
==28349== by 0xAA48375:
X2PFactory_mathml_domIMathMLElement::MakeX2P(void*)
(x2pMathML_content_APISPEC.cpp:3170)
==28349== by 0xAA097EC:
x2p::mathml_dom::MathMLContainer::GetArgument(unsigned int,
mathml_domIMathMLElement**) (x2pMathML_content_APISPEC.cpp:3297)
==28349== by 0xB0374A0:
CellMLInputServices::InMemoryMathFromMathMLElements(cellml_apiIMathList*,
domIElement*, mathml_domIMathMLElement**) (CellMLInputServices.cpp:611)
==28349== by 0xB038210:
CellMLInputServices::InMemoryMathFromComponent(nsString_external const&,
domIElement*, bool const&, mathml_domIMathMLElement**)
(CellMLInputServices.cpp:777)
==28349== by 0xB03B384: CellMLInputServices::Math(nsString_external
const&, domIElement*, nsACString&, bool const&)
(CellMLInputServices.cpp:850)
==28349== by 0xB03F2AA: CellMLInputServices::Component(domIElement*,
nsACString&) (CellMLInputServices.cpp:538)
==28349== by 0xB03FB21:
CellMLInputServices::CellMLToInputFormat(cellml_apiIModel*, nsACString&)
(CellMLInputServices.cpp:190)
==28349== by 0x4A1C2EC: NS_InvokeByIndex_P (in
/home/gry/XULRunner-SDK/bin/libxul.so)
==28349== by 0x42ADEEE: (within /home/gry/XULRunner-SDK/bin/libxul.so)
==28349== by 0x42B34FC: (within /home/gry/XULRunner-SDK/bin/libxul.so)
==28349== by 0x4096504: js_Invoke (in
/home/gry/XULRunner-SDK/bin/libmozjs.so)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Any help on this would certainly be very much appreciated...

Cheers, Alan.

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• [cellml-dev] Alan Garny's branch, Andrew Miller, 06/18/2009
  • [cellml-dev] Alan Garny's branch, Alan Garny, 06/18/2009
  • [cellml-dev] Alan Garny's branch, Alan Garny, 06/19/2009

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