Using GDB for coredump

Revision as of 16:48, 22 September 2020

Enabling core dump

ulimit -c unlimited

Repeat the error to get the core file. Using the core dump. You need the executable (with debug symbol enabled) and the core file

gdb ./rhd core

Then the message could be:

GNU gdb (Ubuntu 8.1-0ubuntu3.2) 8.1.0.20180409-git
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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Reading symbols from ./rhd...done.
[New LWP 1425]
[New LWP 1421]
[New LWP 1423]
[New LWP 1426]
[New LWP 1420]
[New LWP 1427]
[New LWP 1424]
[New LWP 1422]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `./rhd'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f0db0a68c4d in log_task (not_used=0x0) at rhdlog.c:463        <-------------- this is the interesting part that might help
463               symsCnt = getSymtableSize(c);
[Current thread is 1 (Thread 0x7f0daea61700 (LWP 1425))]