topic Re: coredump at pthread_exit in Operating System - HP-UX

coredump at pthread_exit

Naveen Chandika — Tue, 31 Aug 2010 13:21:25 GMT

Hi,

I was getting coredump at pthread_exit. the following is the stack trace.

(gdb) thread 5
[Switching to thread 5 (system thread 1152548)]
#0 0x20000000614aa0f0:0 in real_free+0x7f0 () from /usr/lib/hpux32/libc.so.1
(gdb) bt
#0 0x20000000614aa0f0:0 in real_free+0x7f0 () from /usr/lib/hpux32/libc.so.1
#1 0x20000000614b6540:0 in free+0x180 () from /usr/lib/hpux32/libc.so.1
#2 0x2000000061388680:0 in __res_retrans_key_free+0xa0 ()
from /usr/lib/hpux32/libc.so.1
#3 0x20000000619b8be0:0 in __specific_data_thread_exit+0x4e0 ()
from /usr/lib/hpux32/libpthread.so.1
#4 0x20000000619dccb0:0 in pthread_exit+0x290 ()
from /usr/lib/hpux32/libpthread.so.1
#5 0x2000000061ace710:0 in PThread::Wrapper (ptrThis=0x4006a45c)
at /home03/users/pin102/testenv/exec/vpftst/G00R00C07/vpf/include/vpf_pthread.h:204
#6 0x20000000619da560:0 in __pthread_bound_body+0x190 ()
from /usr/lib/hpux32/libpthread.so.1

Can any one please tell me how to debug this further using gdb to know what its trying to free and failing?

Re: coredump at pthread_exit

Dennis Handly — Tue, 31 Aug 2010 15:44:20 GMT

pthread_exit is just the victim here. Someone has corrupted the heap. You should use gdb's heap corruption detecting tools and rerun:
set heap-check on

Re: coredump at pthread_exit

Naveen Chandika — Mon, 06 Sep 2010 06:23:09 GMT

Thank you.

Can you please let me know how to set heap corruption debug in gdb?
It would be great if you can send me some link for heap corruption debug in gdb.

Re: coredump at pthread_exit

Dennis Handly — Mon, 06 Sep 2010 17:47:54 GMT

>Can you please let me know how to set heap corruption debug in gdb?

This is the basic command: set heap-check on
Download the latest wdb a and documentation at:
http://www.hp.com/go/wdb

Off of the documentation link are whitepapers:
Debugging dynamic memory usage errors using HP WDB
http://h21007.www2.hp.com/portal/download/files/unprot/devresource/Tools/wdb/doc/011310/memdebug-updated.pdf

Re: coredump at pthread_exit

Naveen Chandika — Tue, 07 Sep 2010 13:06:40 GMT

Thank you very much