Op dinsdag 30 juni 2015 11:49:09 schreef Alexander Graf:
> On 06/30/15 11:24, Freek de Kruijf wrote:
> > Op dinsdag 30 juni 2015 10:57:31 schreef Alexander Graf:
> >> On 06/30/15 10:55, Freek de Kruijf wrote:
> >>> Earlier a second boot of a system generated with this build for
> >>> Raspberry
> >>> Pi 1B did not work. Now I have a system that works and can be booted
> >>> again.
> >>> 
> >>> However trying to start a module with yast (ncurses), I tried network,
> >>> software repositories and software all end in the following error
> >>> message:
> >>> 
> >>> /sbin/yast: line 426: 19947 Segmentation fault         $ybindir/y2base
> >>> $module "$@" "$SELECTED_GUI" $Y2_GEOMETRY $Y2UI_ARGS
> >>> 
> >>> However 19947 in the above message differs with the type of module
> >>> called
> >>> and with the locale used.
> >>> 
> >>> The repository still does not contain the ruby 2.2 modules for
> >>> libstorage.
> >>> I build these modules, which went OK. I noticed gcc5 was used.
> >>> 
> >>> I will continue with this build to configure the applications I use.
> >> 
> >> Do you think you could gdb the y2base binary to figure out where exactly
> >> it segfaults?
> > 
> > Alex, I have no experience with gdb. I know it is used to debug and one
> > can
> > set breakpoints and step through the code, but that's all I know.
> 
> No worries, there's always a first time :). In this case, all we need is
> to attach to the program and then do 'bt' when we see the segfault.
> 
> > I tried to run yast in one console and did "gdb -p process-id" in another
> > after installing yast2-core-debugger. However it likes to have yast2-core-
> > debuginfo which is not available. After giving a c in gdb and selecting
> > software in the ncurses console, gdb continues with the following output:
> > 
> > (gdb) c
> > Continuing.
> > Detaching after fork from child process 20159.
> > [Thread 0xb601f450 (LWP 20077) exited]
> > [Thread 0xb631b450 (LWP 20076) exited]
> > [Inferior 1 (process 20075) exited normally]
> 
> This means that the process was doing just fine, no segfault. So maybe a
> different PID was the one broken? Which PID did you attach to? According
> to the log, "y2base" is the application that faults.
> 
> If you can't find it, try to attach strace -f to the yast binary to
> figure out which binary gets executed. The strace should also at least
> print out which PID segfaulted.

I did attach to the y2base process. I think the segfault is in the forked 
process shown above as 20159, which is not present when I start gdb.

-- 
fr.gr.

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Freek de Kruijf

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