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Ralf Mardorf schrieb:
> I opened Shell No. 2 for Konsole and went on.
>
> spinymouse@suse11:~> ulimit -c 10240
> spinymouse@suse11:~> ulimit -c 10240

> Qsynth1

> Audio were fine, but before I could take care of this,
> QSynth crashed and jackd was killed.

> I opened Konqueror file browser. In the users home there is a file qtractor.log,
> but it includes no messages for today and there also is no core file. Without a
> core file, I can't go on with gdb,

maybe the limit for core files was still to small? Core files can be really
huge. Remember it's an image of the program's memory (+registers etc).
Maybe you should try the setting "ulimit -c unlimited"

hope that helps,
Hermann



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Ichthyostega wrote:
> Ralf Mardorf schrieb:
> > I opened Shell No. 2 for Konsole and went on.
>
> > spinymouse@suse11:~> ulimit -c 10240
> > spinymouse@suse11:~> ulimit -c 10240
>
> > Qsynth1
>
> > Audio were fine, but before I could take care of this,
> > QSynth crashed and jackd was killed.
>
> > I opened Konqueror file browser. In the users home there is a file
> qtractor.log,
> > but it includes no messages for today and there also is no core
> file. Without a
> > core file, I can't go on with gdb,
>
> maybe the limit for core files was still to small? Core files can be
> really
> huge. Remember it's an image of the program's memory (+registers etc).
> Maybe you should try the setting "ulimit -c unlimited"
>
> hope that helps,
> Hermann
Thank you

I'll try it again with the value "unlimted", depending to the web page I
read a value of "1" should be 1024 bytes = 1 KB, so a value of "1024"
would be for 1 MB and a value of 10240 for 1 GB, another side said, a
value of "1024" is for 1 GB, so a value of "10240" would be for 10 GB.
As far as I remember you wrote, that a value of "1" is for 1 byte, than
"10240" would be for 1 MB.

Okay, 1 MB and 1 GB might be not enough, but I hope 10 GB will be
enough. If I'll use the partition with the most free space, "unlimited"
would mean less than 54.73 GB, "unlimited" shouldn't be more than around
50 GB. I hope this will be enough.

Cheers,
Ralf

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Ralf Mardorf schrieb:
> I'll try it again with the value "unlimted", depending to the web page I
> read a value of "1" should be 1024 bytes = 1 KB,

I just tried it out ... you are right, the value seems to be something in kB,
and obviously it gets rounded to even page numbers. But anyway, even if the
size is too small, you should at least see a core file, albeit truncated.
At least that's how my system behaves.

Let's just try it out in a dry run!

Enter the following in a text file called "broken.c"

int
main (int argc, char* argv[])
{
int * weh = 0;
int oh = *weh;

return 0;
}

This should segfault, right? :-P
Now compile it with

gcc broken.c -o broken

...giving you an executable called "broken" in the current directory.
Run it with

./broken

and you should get an segfault (but no core dump).
Then re-try it after issuing "ulimit -c unlimited"
Note, when creating a core, the program also says on stderr:

"Speicherzugriffsfehler (core dumped)"

or similar in english.
Does this test "work" for you?

Cheers
Hermann



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