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List: mozilla-qt
Subject: Re: qtMozilla build seg fault
From: "John C. Griggs" <jcgriggs () sympatico ! ca>
Date: 2001-07-13 14:54:14
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Christopher,
I appreciate the effort you are putting into figuring this out! Please let me know \
if you need any help building Qt Mozilla. AFAIK, there should be no problem with any \
recent (last month or so) version of the source. The key is using the correct \
options for configure and making sure that Mozilla finds the Qt stuff in the right \
place. In particular it is important that the version of the moc preprocessor (which \
Qt uses to extend C++ and implement its signal/slot mechanism) match the library \
version - this will only be a problem if you have more than one version of Qt \
installed.
In any case, don't hesitate to email me or to post here if you have any questions or \
run into any problems.
Regards,
John Griggs
"Christopher H. Gleba" wrote:
> Hello John,
>
> I appreciate the response and your help. . .I've downloaded the mozilla source
> and am attemting to build it (it is a monster :)). It will take me a while,
> however I will get back to you with any status.
>
> Thanks again!
>
> "John C. Griggs" wrote:
> >
> > "Christopher H. Gleba" wrote:
> >
> > > Hello,
> > >
> > > Sorry about that -- I'm a sys admin with some light programming experience as
> > > shown by my post. . .
> >
> > No sweat. I didn't mean to embarrass you or anything, just to correct you about \
> > what a stack trace was (as opposed to the output from strace et al) and give you \
> > some pointers on how to create one. I apologize if my tone was harsh - Monday \
> > morning, don't ya know 8^).
> > > I think this is what you are looking for. . .if it is not I will not waste your
> > > time in having you teach me how to use gdb. . .I don't know if having the
> > > symbold stripped from Dimi Shahbaz's builds makes it tougher to debug. . .
> >
> > I don't consider any bug report that at least attempts to provide information a \
> > waste of time and I appreciate that you took the time to report your problem. If \
> > I really thought you were wasting my time I would not have responded at all, \
> > rather than try to get more information to try to get to the bottom of it! I'm \
> > willing to try to help anyone who has problems with Qt Mozilla as long as they \
> > are willing to meet me halfway to try to get to the root cause.
> > You are correct though, the lack of debugging symbols does reduce the usefulness \
> > of the stack trace - I had forgotten that Dimi's builds were stripped.
> >
> > > mozilla --debug --debugger=gdb:
> > >
> > > bash-2.04$ ./mozilla --debug --debugger=gdb
> > > ./run-mozilla.sh -g ./mozilla-bin --debugger=gdb
> > > MOZILLA_FIVE_HOME=/home/cgleba/tmp/mozilla
> > >
> > > LD_LIBRARY_PATH=/home/cgleba/tmp/mozilla:/home/cgleba/tmp/mozilla/plugins:.:./plugins:/usr/lib:/home/cgleba/tmp/mozilla
> > >
> > > LIBRARY_PATH=/home/cgleba/tmp/mozilla:/home/cgleba/tmp/mozilla/components:.:./components
> > > SHLIB_PATH=/home/cgleba/tmp/mozilla:.
> > > LIBPATH=/home/cgleba/tmp/mozilla:.
> > > ADDON_PATH=/home/cgleba/tmp/mozilla:.
> > > MOZ_PROGRAM=./mozilla-bin
> > > MOZ_TOOLKIT=
> > > moz_debug=1
> > > moz_debugger=
> > > which: no ddd in
> > > (/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/usr/games:/home/cgleba/bin)
> > > /usr/bin/gdb ./mozilla-bin -x /tmp/mozargs5489
> > > GNU gdb 5.0mdk-11mdk Linux-Mandrake 8.0
> > > Copyright 2001 Free Software Foundation, Inc.
> > > GDB is free software, covered by the GNU General Public License, and you are
> > > welcome to change it and/or distribute copies of it under certain conditions.
> > > Type "show copying" to see the conditions.
> > > There is absolutely no warranty for GDB. Type "show warranty" for details.
> > > This GDB was configured as "i386-mandrake-linux"...(no debugging symbols
> > > found)...
> > > (gdb) run
> > > Starting program: /home/cgleba/tmp/mozilla/./mozilla-bin --debugger=gdb
> > > (no debugging symbols found)...(no debugging symbols found)...(no debugging
> > > symbols found)...(no debugging symbols found)...
> > > (no debugging symbols found)...(no debugging symbols found)...(no debugging
> > > symbols found)...[New Thread 1024 (LWP 5500)]
> > > [New Thread 2049 (LWP 5502)]
> > > Delayed SIGSTOP caught for LWP 5502.
> > > [New Thread 1026 (LWP 5503)]
> > > Delayed SIGSTOP caught for LWP 5503.
> > > [New Thread 2051 (LWP 5504)]
> > > Delayed SIGSTOP caught for LWP 5504.
> > > Qt: gdb: -nograb added to command-line options.
> > > Use the -dograb option to enforce grabbing.
> > >
> > > Program received signal SIGSEGV, Segmentation fault.
> > > [Switching to Thread 1024 (LWP 5500)]
> > > 0x35303039 in ?? ()
> > > (gdb) bt
> > > #0 0x35303039 in ?? ()
> > > #1 0x40627dae in NSGetModule () from
> > > /home/cgleba/tmp/mozilla/components/libwidget_qt.so
> > > #2 0x40627c6b in NSGetModule () from
> > > /home/cgleba/tmp/mozilla/components/libwidget_qt.so
> > > #3 0x406284c4 in NSGetModule () from
> > > /home/cgleba/tmp/mozilla/components/libwidget_qt.so
> > > #4 0x404b4ca4 in NSGetModule () from
> > > /home/cgleba/tmp/mozilla/components/libnsappshell.so
> > > #5 0x0804ec38 in strcpy ()
> > > #6 0x0804f7bc in strcpy ()
> > > #7 0x4021a0de in __libc_start_main () from /lib/libc.so.6
> > > (gdb)
> >
> > It looks like some kind of error loading the libwidget_qt.so shared library or \
> > one of the libraries it depends on. Are you sure that the run-time linker \
> > (ld.so) on your system is configured to locate the Qt shared libraries? The \
> > locattion of these libraries must either be in the LD_LIBRARY_PATH environment \
> > variable or in /etc/ld.so.conf (if you add them to this file, you must run \
> > ldconfig to build the /etc/ld.so.cache file that the linker actually reads the \
> > info from).
> > Even if this isn't the case, I'm pretty sure that the problem is some kind of \
> > issue with Qt Mozilla in your particular environment. From the stack trace, the \
> > seg fault appears to be happening outside of any Qt-specific code, in code that \
> > is common to every Unix/Linux toolkit. If the problem was actually in the code \
> > itself, I'd expect to see this problem reported by many people, with Qt Mozilla \
> > and the other ports as well. This doesn't mean that I'm not interested in \
> > figuring out what is going on, just that I think we'll get more mileage from \
> > looking at the demands Mozilla is making on your environment than at the code - \
> > at least at this point.
> > In either case, if you have the time, bandwidth and willingness, I'd suggest \
> > pulling the source code and building Qt Mozilla locally, with debugging included. \
> > This will not only allow a more detailed stack trace, it will also cause Mozilla \
> > itself to output some status messages that may help us determine what is causing \
> > the load failure. If you are willing to do this, feel free to email me directly \
> > and I'll help you through acquiring the code as well as configuring and building \
> > it.
> > > My main objective is to attempt to aide in ironing out bugs in the build as a
> > > tester. . .I don't know if these posts are more of a help or a hinderence. . .
> >
> > I do appreciate that you took the time to report this problem and I think that, \
> > at this point anyway, it is better here than as a Bugzilla report (although, if \
> > the problem does turn out to be in the code, I'd open a Bugzilla ticket, if only \
> > to track any patches that are required). Again, I apologize if my previous \
> > response gave the wrong impression and I thank you for reporting the problem...
> >
> > Regards,
> > John Griggs
>
> --
> --Chris
>
> .-.
> (, )O()
> ( )O.( ')o. _____________________________________________
> > XXXXXXXX|O ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> __|//\\//\\|o cgleba@soma.978.org (primary) ||||
> /.-|\\//\\//| cgleba@photomachining.com (secondary) c ..
> > > > //\\//\\| cgleba@hotmail.com (rarely checked) \ 7
> \'-|\\//\\//| \_~
> '"|//\\//\\| _____________________________________________
> > XXXXXXXX| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> `""`""`""`
> "I'm surrounded by Assholes. Keep firing Assholes."
> -- Dark Helmut, Spaceballs
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