How to generate a core dump in Linux on a segmentation fault?

Question

I have a process in Linux that\'s getting a segmentation fault. How can I tell it to generate a core dump when it fails?

Answer 1

For Ubuntu 14.04

1. Check core dump enabled:

   ulimit -a
   

2. One of the lines should be :

   core file size          (blocks, -c) unlimited
   

3. If not :

   gedit ~/.bashrc and add ulimit -c unlimited to end of file and save, re-run terminal.

4. Build your application with debug information :

   In Makefile -O0 -g

5. Run application that create core dump (core dump file with name ‘core’ should be created near application_name file):

   ./application_name
   

6. Run under gdb:

   gdb application_name core