Bug 171982

Summary:	sys-libs/glibc-2.5-r1 - nptl fails an assertion with VMSPLIT_3G
Product:	Gentoo Linux	Reporter:	Matteo Sasso <matteo.sasso>
Component:	[OLD] Core system	Assignee:	Gentoo Toolchain Maintainers <toolchain>
Status:	RESOLVED NEEDINFO
Severity:	normal
Priority:	High
Version:	2006.1
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	emerge --info kernel .config gdb output

Description Matteo Sasso 2007-03-23 23:56:10 UTC

I just recompiled my kernel in order to make use of all my RAM. This is the only change I made. Trying to launch Kopete, yields:

kopete: tpp.c:63: __pthread_tpp_change_priority: Assertion `new_prio == -1 || (new_prio >= __sched_fifo_min_prio && new_prio <= __sched_fifo_max_prio)' failed.

Probabily a bug upstream. I'll try recompiling glibc without nptl support.

Comment 1 SpanKY gentoo-dev

2007-03-24 07:40:55 UTC

no real information here ... you need to post things like:
 - `emerge --info`
 - what version of kopete you're using
 - build a debug version of kopete and run it through gdb
 - your kernel .config

rebuilding glibc without nptl support is not a useful test

Comment 2 Matteo Sasso 2007-03-24 10:28:40 UTC

Ok, sorry.
Kopete is v3.5.6. I'm attaching emerge --info and .config.
I'm building the debug version, it'll take some minutes.

Comment 3 Matteo Sasso 2007-03-24 10:29:20 UTC

Created attachment 114213 [details]
emerge --info

Comment 4 Matteo Sasso 2007-03-24 10:29:51 UTC

Created attachment 114215 [details]
kernel .config

Comment 5 Matteo Sasso 2007-03-24 11:42:37 UTC

Running kopete under gdb doesn't yield much information. It just prints some (seemingly) unrelated info and then crashes. Even with the crash handler disabled, kopete just quits gracefully and I'm left without a backtrace ("No stack.")

Can anyone help me with this? Would it be useful to recompile kdelibs with the debug flag?

Comment 6 SpanKY gentoo-dev

2007-03-24 22:03:18 UTC

http://www.gentoo.org/doc/en/bugzilla-howto.xml

Comment 7 Matteo Sasso 2007-03-27 19:49:47 UTC

Thanks for the link, it was somehow helpful and I understood some things about the debugging process which weren't clear before.

I applied the suggestions in the howto to both glibc and kopete but I still get the message "Program exited normally." from gdb.
I tried to place a breakpoint on __pthread_tpp_change_priority, to no avail:
"Function "__pthread_tpp_change_priority" not defined.
Make breakpoint pending on future shared library load? (y or [n])"
I say "yes", but the break just doesn't happen.

I compiled both packages with the debug USE flag, nostrip FEATURE, "-g -ggdb" CFLAGS and CXXFLAGS. Then I run "gdb --args kopete --nocrashhandler".

Could you give me some more specific suggestions? It looks like I'm missing something about how gdb works.

I'm attaching gdb output.

Comment 8 Matteo Sasso 2007-03-27 19:52:01 UTC

Created attachment 114672 [details]
gdb output