[maemo-developers] Segmentation fault with the latest microb-engine

[From: josh.soref at nokia.com]

Zhihai Wang wrote:
> I have checked out the latest source code from the repository
> https://garage.maemo.org/svn/browser/mozilla/trunk/microb-engine
> and compiled in scratchbox under CHINOOK_X86, everything went
> smoothly. 
> 
> After installing the built debian packages, I started
> "run-standalone.sh /usr/lib/microb-engine/TestGtkEmbed",
> and try to access some website such as "www.google.com" or
> "about:blank", I got a "Segmentation fault".
...
> /usr/bin/run-standalone.sh: line 11: 21205 Segmentation fault     
> (core dumped) "$@" 
> 
> Anyone knows what might have happened?

Anything.

Before sending messages like this about *any* software to any list you
should:

1. build everything with debugging symbols

For gecko, this means adding: --disable-strip
--enable-debugger-info-modules
(or --enable-debug) to your mozconfig
(it also means doing something to prevent debugging symbols from being
stripped by debian)

2. get a stack trace

For gecko, this means:
./run-mozilla.sh -g -d gdb ./TestGtkEmbed

In maemo this means:

/usr/bin/run-standalone.sh /bin/sh
cd /usr/lib/microb-engine/
./run-mozilla.sh -g -d gdb ./TestGtkEmbed

If you were actually dealing with a device instead of a scratchbox then
gdbserver would probably be your friend (-d gdbserver).
Note that you want to build an install the latest version of gdb (6.8 or
something) instead of using whichever version your system has.

You should also read any debugging guides for your platform.

Google: debugging maemo 4
http://maemo.org/development/documentation/how-tos/4-x/maemo_debugging_g
uide.html

Google: debugging unix faq
http://developer.mozilla.org/en/docs/Debugging_Mozilla_on_Linux_FAQ

Google: maemo-debug
http://maemo.org/development/tools/doc/chinook/maemo-debug-scripts/

You'll want to use debug-dep-install to grab symbols for the system
libraries.