[Buildroot] WebKit - Random-crashes ?

[Will Wagner]

On 20/03/2012 12:48, Sagaert Johan wrote:
>
> Hi
>
> Libsoup again ....
> Hmm remember a few weeks ago a got a problem to with libsoup and the networking used from libglib2
>
> The issue i had was :
>
> Run a function from main() ->  function works
> Run the same function from a thread (either pthread or gthread) functions failed : could not connect..
> I traced it down to gsocket.c and then gave up searching...,i have a target date to get the soft ready.
>
> The socket connect() returned with -1 but errno did not contain the error...
> If i had set errno=1234 BEFORE the connect, then after the connect() failed it still contained 1234 ...
> In reality errno should of been set to EINPROGRESS (115)...
> Strange things that i could not explain...

Hi Johan,

This sounds a lot like a linuxthreads errno bug in uClibc. There is an 
open bug report in uClibc somewhere on the issue. If you built your 
toolchain using buildroot then a patch should have been applied 
(uClibc-0.9.32-linuxthreads-errno-fix.patch) but if you built it using 
crosstools-ng then this issue will remain.

Regards
Will

>
> Johan
>
> -----Oorspronkelijk bericht-----
> Van: buildroot-bounces at busybox.net [mailto:buildroot-bounces at busybox.net] Namens Thomas Petazzoni
> Verzonden: dinsdag 20 maart 2012 11:18
> Aan: buildroot at busybox.net
> Onderwerp: Re: [Buildroot] WebKit - Random-crashes ?
>
> Le Tue, 20 Mar 2012 10:50:13 +0100,
> "Vellemans, Noel"<Noel.Vellemans at visionBMS.com>  a écrit :
>
>> Finally got 'something' running, that is not crashing all the time.
>> What Did I do?
>> A) Reverted back to older-WebKit 1.2.7. : DID NOT HELP (i.o.w
>> WebKit/GtkLauncher still crashes 'random')
>> A) Reverted back to Uclibc 0.9.32.x     : DID NOT HELP.
>> B) Reverted back to glib-2.28.8         : DID NOT HELP.
>> C) reverted to an older version of GTK (2.24.4): DID NOT HELP.
>> D) Reverted back to libsoup-2.32.2 (had to remove glib-networking
>> depends): SEEMS to be STABLE!
>
> Ah, interesting. Then maybe contacting the libsoup developers will be a good idea.
>
> Another option is to try to upgrade libsoup. We have 2.36.1 in Buildroot, the latest one is
> http://ftp.gnome.org/pub/GNOME/sources/libsoup/2.37/libsoup-2.37.92.tar.xz.
>
>> Compiling WebKit (and his depends) takes some time, even on
>> fast-build-machine (some hours in my case).
>> In order to be sure that everything is recompiled/linked correctly, I
>> always wipe the complete 'output' directory.
>> Is there a faster way to do this?
>> {if I do not wipe the output directory I always have leftovers (in
>> /lib, /usr/lib ..... ) ... from previous compile cycle(s).}
>
> If you want to just rebuild *one* component, you can do:
>
> 	rm -rf output/build/<component>-<version>
>
> and do 'make'. But note that it doesn't remove the previous installation from the target directory, the installation of the new
> component version will overwrite the old one, unless the installed files are different, of course.
>
> Another way of speeding up the build is to use an external toolchain if you're not already using. You can also enable the ccache
> feature (be sure to have the latest ccache fixes, otherwise ccache is basically unused).
>
>> I run Gtklauncher in Val grind as suggested, but I get a Lot of
>> 'console'-output from everywhere.
>> For example.... "== Invalid write of size 4" and/or "Address 0x97b6e14
>> is not stack'd, malloc'd or (recently) free'd"
>> Don't know exactly, how valuable this output is ( i.o.w. did not look
>> into the details yet...)
>
> valgrind is a big, big hammer, and for any given large software stack, the number of errors is so huge that it's difficult to find
> out what's going on.
>
> Thomas
> --
> Thomas Petazzoni, Free Electrons
> Kernel, drivers, real-time and embedded Linux development, consulting, training and support.
> http://free-electrons.com
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-- 
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Will Wagner                                     will_wagner at carallon.com
Development Manager                      Office Tel: +44 (0)20 7371 2032
Carallon Ltd, Studio G20, Shepherds Building, Rockley Rd, London W14 0DA
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