Getting a back trace

We are trying to debug an issue with one of our servers and I am not sure we are getting enough information in the core dump. Right now our back trace doesn’t seem to have enough information to properly track down what is locking the threads.

They all look like this with the message no symbol information.

Thread 458 (Thread 0x7fea35c24700 (LWP 21156)):
#0 0x00007feb62ad8a5e in [email protected]@GLIBC_2.3.2 () from /lib64/libpthread.so.0
No symbol table info available.
#1 0x000000000053ee8e in __ast_cond_timedwait ()
No symbol table info available.
#2 0x000000000046731e in ast_audiohook_trigger_wait ()
No symbol table info available.
#3 0x00007feabc79bdf2 in ?? () from /usr/lib64/asterisk/modules/app_mixmonitor.so
No symbol table info available.
#4 0x0000000000607c84 in ?? ()
No symbol table info available.
#5 0x00007feb62ad4aa1 in start_thread () from /lib64/libpthread.so.0
No symbol table info available.
#6 0x00007feb61e5c93d in clone () from /lib64/libc.so.6
No symbol table info available.

Is there a way to get additional information from the core dump?

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