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boundary="===============3970562429210643862==" Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" --===============3970562429210643862== Content-Language: en-GB Content-Type: multipart/alternative; boundary="_000_MW3PR12MB4555EFAAF7F86C5EFA8DB849D9E8AMW3PR12MB4555namp_" --_000_MW3PR12MB4555EFAAF7F86C5EFA8DB849D9E8AMW3PR12MB4555namp_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi All, I am observing lttng crash while trying to interface LTTNG for one of my py= thon3 application. I just tried the following things, Added "import lttngust " in the code. # lttng create clagd Session clagd created. Traces will be written in /root/lttng-traces/clagd-20230905-062210 # lttng enable-event --python clagd #lttng start #service clagd start cumulus-core: Running cl-support for core files "clagd-ust.95410.1693895062= .core" #0 0x00007f134fb938eb in raise () from /lib/x86_64-linux-gnu/libc.so.6 #1 0x00007f134fb7e535 in abort () from /lib/x86_64-linux-gnu/libc.so.6 #2 0x00007f134fb7e40f in ?? () from /lib/x86_64-linux-gnu/libc.so.6 #3 0x00007f134fb8c1a2 in __assert_fail () from /lib/x86_64-linux-gnu/libc.= so.6 #4 0x00007f134f1a9677 in lttng_ust_add_fd_to_tracker () from /lib/x86_64-l= inux-gnu/liblttng-ust.so.0 #5 0x00007f134f1bdcf4 in lttng_ust_elf_create () from /lib/x86_64-linux-gn= u/liblttng-ust.so.0 #6 0x00007f134f1bf8de in ?? () from /lib/x86_64-linux-gnu/liblttng-ust.so.= 0 #7 0x00007f134fc8f957 in dl_iterate_phdr () from /lib/x86_64-linux-gnu/lib= c.so.6 #8 0x00007f134f1bff6b in lttng_ust_dl_update () from /lib/x86_64-linux-gnu= /liblttng-ust.so.0 #9 0x00007f134f1c061a in do_lttng_ust_statedump () from /lib/x86_64-linux-= gnu/liblttng-ust.so.0 #10 0x00007f134f1b5ca9 in lttng_handle_pending_statedump () from /lib/x86_6= 4-linux-gnu/liblttng-ust.so.0 #11 0x00007f134f1ab6d1 in ?? () from /lib/x86_64-linux-gnu/liblttng-ust.so.= 0 #12 0x00007f134f1ad7eb in ?? () from /lib/x86_64-linux-gnu/liblttng-ust.so.= 0 #13 0x00007f134ff0dfa3 in start_thread () from /lib/x86_64-linux-gnu/libpth= read.so.0 #14 0x00007f134fc5506f in clone () from /lib/x86_64-linux-gnu/libc.so.6 When I stop the lttng session, I see another core #0 0x00007fad951988eb in raise () from /lib/x86_64-linux-gnu/libc.so.6 [Current thread is 1 (Thread 0x7fad9331f700 (LWP 2221103))] (gdb) bt #0 0x00007fad951988eb in raise () from /lib/x86_64-linux-gnu/libc.so.6 #1 0x00007fad95183535 in abort () from /lib/x86_64-linux-gnu/libc.so.6 #2 0x00007fad9518340f in ?? () from /lib/x86_64-linux-gnu/libc.so.6 #3 0x00007fad951911a2 in __assert_fail () from /lib/x86_64-linux-gnu/libc.= so.6 #4 0x00007fad947e8d9f in ?? () from /lib/x86_64-linux-gnu/liblttng-ust.so.= 0 #5 0x00007fad947e98e3 in shm_object_table_destroy () from /lib/x86_64-linu= x-gnu/liblttng-ust.so.0 #6 0x00007fad947e4d9a in channel_destroy () from /lib/x86_64-linux-gnu/lib= lttng-ust.so.0 #7 0x00007fad947ba6b5 in lttng_session_destroy () from /lib/x86_64-linux-g= nu/liblttng-ust.so.0 #8 0x00007fad947b47c6 in ?? () from /lib/x86_64-linux-gnu/liblttng-ust.so.= 0 #9 0x00007fad947b4bac in lttng_ust_objd_unref () from /lib/x86_64-linux-gn= u/liblttng-ust.so.0 #10 0x00007fad947b4bac in lttng_ust_objd_unref () from /lib/x86_64-linux-gn= u/liblttng-ust.so.0 #11 0x00007fad947b4bac in lttng_ust_objd_unref () from /lib/x86_64-linux-gn= u/liblttng-ust.so.0 #12 0x00007fad947b5304 in lttng_ust_objd_table_owner_cleanup () from /lib/x= 86_64-linux-gnu/liblttng-ust.so.0 #13 0x00007fad947b2b75 in ?? () from /lib/x86_64-linux-gnu/liblttng-ust.so.= 0 #14 0x00007fad95512fa3 in start_thread () from /lib/x86_64-linux-gnu/libpth= read.so.0 #15 0x00007fad9525a06f in clone () from /lib/x86_64-linux-gnu/libc.so.6 Can you please help here if I'm missing something. This is a critical task = item for us but are currently stuck with multiple lttng crashes. Regards, Lakshmi --_000_MW3PR12MB4555EFAAF7F86C5EFA8DB849D9E8AMW3PR12MB4555namp_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi All, 

I am observing lttng crash while trying to interface LTTNG for one of my py= thon3 application. 
I just tried the following things, 

Added "import lttngust " in the code. 

# lttng create clagd
Session clagd created.
Traces will be written in /root/lttng-traces/clagd-20230905-062210

# lttng enable-event --python clagd
#lttng start

#service clagd start

cumulus-core: Running cl-support for core = files "clagd-ust.95410.1693895062.core"

#0  0x00007f134fb938eb in raise () from = /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f134fb7e535 in abort () from = /lib/x86_64-linux-gnu/libc.so.6
#2  0x00007f134fb7e40f in ?? () from /li= b/x86_64-linux-gnu/libc.so.6
#3  0x00007f134fb8c1a2 in __assert_fail = () from /lib/x86_64-linux-gnu/libc.so.6
#4  0x00007f134f1a9677 in lttng_ust_add_= fd_to_tracker () from /lib/x86_64-linux-gnu/liblttng-ust.so.0
#5  0x00007f134f1bdcf4 in lttng_ust_elf_= create () from /lib/x86_64-linux-gnu/liblttng-ust.so.0
#6  0x00007f134f1bf8de in ?? () from /li= b/x86_64-linux-gnu/liblttng-ust.so.0
#7  0x00007f134fc8f957 in dl_iterate_phd= r () from /lib/x86_64-linux-gnu/libc.so.6
#8  0x00007f134f1bff6b in lttng_ust_dl_u= pdate () from /lib/x86_64-linux-gnu/liblttng-ust.so.0
#9  0x00007f134f1c061a in do_lttng_ust_s= tatedump () from /lib/x86_64-linux-gnu/liblttng-ust.so.0
#10 0x00007f134f1b5ca9 in lttng_handle_pendin= g_statedump () from /lib/x86_64-linux-gnu/liblttng-ust.so.0
#11 0x00007f134f1ab6d1 in ?? () from /lib/x86= _64-linux-gnu/liblttng-ust.so.0
#12 0x00007f134f1ad7eb in ?? () from /lib/x86= _64-linux-gnu/liblttng-ust.so.0
#13 0x00007f134ff0dfa3 in start_thread () fro= m /lib/x86_64-linux-gnu/libpthread.so.0
#14 0x00007f134fc5506f in clone () from /lib/= x86_64-linux-gnu/libc.so.6


When I stop the lttng session, I see another core 

#0  0x00007fad951988eb in raise () from /lib/x86_64-linux-gnu/libc.so.= 6
[Current thread is 1 (Thread 0x7fad9331f700 (= LWP 2221103))]
(gdb) bt
#0  0x00007fad951988eb in raise () from = /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007fad95183535 in abort () from = /lib/x86_64-linux-gnu/libc.so.6
#2  0x00007fad9518340f in ?? () from /li= b/x86_64-linux-gnu/libc.so.6
#3  0x00007fad951911a2 in __assert_fail = () from /lib/x86_64-linux-gnu/libc.so.6
#4  0x00007fad947e8d9f in ?? () from /li= b/x86_64-linux-gnu/liblttng-ust.so.0
#5  0x00007fad947e98e3 in shm_object_tab= le_destroy () from /lib/x86_64-linux-gnu/liblttng-ust.so.0
#6  0x00007fad947e4d9a in channel_destro= y () from /lib/x86_64-linux-gnu/liblttng-ust.so.0
#7  0x00007fad947ba6b5 in lttng_session_= destroy () from /lib/x86_64-linux-gnu/liblttng-ust.so.0
#8  0x00007fad947b47c6 in ?? () from /li= b/x86_64-linux-gnu/liblttng-ust.so.0
#9  0x00007fad947b4bac in lttng_ust_objd= _unref () from /lib/x86_64-linux-gnu/liblttng-ust.so.0
#10 0x00007fad947b4bac in lttng_ust_objd_unre= f () from /lib/x86_64-linux-gnu/liblttng-ust.so.0
#11 0x00007fad947b4bac in lttng_ust_objd_unre= f () from /lib/x86_64-linux-gnu/liblttng-ust.so.0
#12 0x00007fad947b5304 in lttng_ust_objd_tabl= e_owner_cleanup () from /lib/x86_64-linux-gnu/liblttng-ust.so.0
#13 0x00007fad947b2b75 in ?? () from /lib/x86= _64-linux-gnu/liblttng-ust.so.0
#14 0x00007fad95512fa3 in start_thread () fro= m /lib/x86_64-linux-gnu/libpthread.so.0
#15 0x00007fad9525a06f in clone () from /lib/= x86_64-linux-gnu/libc.so.6


Can you please help here if I'm missing something. This is a critical task = item for us but are currently stuck with multiple lttng crashes. 

Regards,
Lakshmi
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