Hi All, I am observing lttng crash while trying to interface LTTNG for one of my python3 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-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 /lib/x86_64-linux-gnu/liblttng-ust.so.0 #7 0x00007f134fc8f957 in dl_iterate_phdr () from /lib/x86_64-linux-gnu/libc.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_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 () from /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 /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-linux-gnu/liblttng-ust.so.0 #6 0x00007fad947e4d9a in channel_destroy () 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 /lib/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_unref () from /lib/x86_64-linux-gnu/liblttng-ust.so.0 #11 0x00007fad947b4bac in lttng_ust_objd_unref () from /lib/x86_64-linux-gnu/liblttng-ust.so.0 #12 0x00007fad947b5304 in lttng_ust_objd_table_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 () from /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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