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Posted to apreq-dev@httpd.apache.org by Sven Geisler <sg...@aeccom.com> on 2002/12/19 14:45:18 UTC
segfaults with libaprep1.1 and perl 5.8
Hi,
my company develop a web application using mod_perl (1.27) and apache
(1.3.27). We use RH 7.3 with self compiled perl 5.6.1 as SOE.
One of my targets are the handlers. We use 11 diferent perl handlers
currently.
We use libapreq 1.0 (Apache::Request) to handle file uploads and html
form data. libapreq does a great job.
We try to use perl 5.8. So we use libapreq 1.1. With this configuration
we got from time to time a segfault.
It looks like
I want to find the problem. What information are needed. What can I do?
Regards
Sven.
Re: segfaults with libaprep1.1 and perl 5.8
Posted by Stas Bekman <st...@stason.org>.
Sven Geisler wrote:
> Hi Joe,
>
> I try to get core dumps. But I didn't find core dumps after a segfault.
> Has anyone a idea?
This should help:
http://perl.apache.org/docs/2.0/devel/debug/c.html#Getting_the_core_File_Dumped
__________________________________________________________________
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Re: segfaults with libaprep1.1 and perl 5.8
Posted by Sven Geisler <sg...@aeccom.com>.
Hi Joe,
I try to get core dumps. But I didn't find core dumps after a segfault.
Has anyone a idea?
Sven.
Am Don, 2002-12-19 um 18.11 schrieb Joe Schaefer:
> Sven Geisler <sg...@aeccom.com> writes:
>
> > Hi Joe,
> >
> > I would like to support you and fix the problem.
> > "What can I do?" means also how can I find the bug, are there hidden
> > information to this kind of segfault?
>
> It's tricky- search the mod_perl list's archive (~8 months ago?) for
> a conversation between Doug MacEachern and Andrew Koenig
> regarding these segfaults. Their discussion is also on
> the perl5.porters list (IIRC, the p5p discussion has more info
> than the mod_perl archives). This segfault was affecting
> PAUSE; I don't know how Mr. Koenig resolved it.
>
> Doug put together a few patches, and I applied one of them to apreq
> last month, but I don't know if it was the correct fix.
>
> Please keep the apreq-dev list informed regarding your progress.
> It'd really help if you posted the particulars of your situation
> to apreq-dev, so at least we'd have a detailed record. If you've
> compiled perl5.8.0 with ithread support, you might try disabling
> that and see if the segfaults disappear.
>
> Good luck, and thanks for the help!
>
> --
> Joe Schaefer
>
Re: segfaults with libaprep1.1 and perl 5.8
Posted by Joe Schaefer <jo...@sunstarsys.com>.
Sven Geisler <sg...@aeccom.com> writes:
> Hi Joe,
>
> I would like to support you and fix the problem.
> "What can I do?" means also how can I find the bug, are there hidden
> information to this kind of segfault?
It's tricky- search the mod_perl list's archive (~8 months ago?) for
a conversation between Doug MacEachern and Andrew Koenig
regarding these segfaults. Their discussion is also on
the perl5.porters list (IIRC, the p5p discussion has more info
than the mod_perl archives). This segfault was affecting
PAUSE; I don't know how Mr. Koenig resolved it.
Doug put together a few patches, and I applied one of them to apreq
last month, but I don't know if it was the correct fix.
Please keep the apreq-dev list informed regarding your progress.
It'd really help if you posted the particulars of your situation
to apreq-dev, so at least we'd have a detailed record. If you've
compiled perl5.8.0 with ithread support, you might try disabling
that and see if the segfaults disappear.
Good luck, and thanks for the help!
--
Joe Schaefer
Re: segfaults with libaprep1.1 and perl 5.8
Posted by Sven Geisler <sg...@aeccom.com>.
Hi Joe,
I would like to support you and fix the problem.
"What can I do?" means also how can I find the bug, are there hidden
information to this kind of segfault?
Our application - a project communication management system with
integrated document management - has a lot of uploads.
What we see, the segfault is mostly not during the same request. GDB
tells us the segfault is in the glibc.
Any ideas?
Sven.
Am Don, 2002-12-19 um 15.12 schrieb Joe Schaefer:
> Sven Geisler <sg...@aeccom.com> writes:
>
> [...]
>
> > We try to use perl 5.8. So we use libapreq 1.1. With this configuration
> > we got from time to time a segfault.
> > It looks like
> >
> > I want to find the problem. What information are needed. What can I do?
>
> Thanks for the feedback. The segfault is likely tickled by
> the file-upload code in Apache::Request. A backtrace
> of the core file would help; so would the server's error
> log, as well as the output of "perl -V".
>
> See
>
> http://perl.apache.org/docs/1.0/guide/help.html#How_to_Report_Problems
>
> for more detailed instructions.
>
> --
> Joe Schaefer
>
Re: segfaults with libaprep1.1 and perl 5.8
Posted by Joe Schaefer <jo...@sunstarsys.com>.
Sven Geisler <sg...@aeccom.com> writes:
[...]
> We try to use perl 5.8. So we use libapreq 1.1. With this configuration
> we got from time to time a segfault.
> It looks like
>
> I want to find the problem. What information are needed. What can I do?
Thanks for the feedback. The segfault is likely tickled by
the file-upload code in Apache::Request. A backtrace
of the core file would help; so would the server's error
log, as well as the output of "perl -V".
See
http://perl.apache.org/docs/1.0/guide/help.html#How_to_Report_Problems
for more detailed instructions.
--
Joe Schaefer