Exercise 24-3: No Dump File Produced

[dfhawthorne]

Running make test_3 doesn't produce a core dump. This applies to commit 07bfd96.

To find where core dumps are being routed, I ran the following command:

cat /proc/sys/kernel/core_pattern

returns

|/usr/share/apport/apport -p%p -s%s -c%c -d%d -P%P -u%u -g%g -F%F -- %E

This means Ubuntu is using Apport to manage core dumps. I checked the liveness of Apport using the following command:

systemctl status apport

returns:

● apport.service - automatic crash report generation
     Loaded: loaded (/usr/lib/systemd/system/apport.service; enabled; preset: enabled)
     Active: active (exited) since Sun 2026-06-21 19:21:34 AEST; 5h 8min ago
   Main PID: 1450 (code=exited, status=0/SUCCESS)
        CPU: 495ms

Jun 21 19:21:17 coogee systemd[1]: Starting apport.service - automatic crash report generation...
Jun 21 19:21:34 coogee systemd[1]: Finished apport.service - automatic crash report generation.

Normally, Apport writes core dumps as .crash files in /var/crash directory. I checked for existing core dumps:

ls -l /var/crash/*.crash

returns only two (2) core dumps, neither at the time the program ran:

-rw-r----- 1 douglas whoopsie 32338540 Jun 14 19:24 /var/crash/_usr_bin_gnome-shell.1000.crash
-rw-r----- 1 gdm     whoopsie 26489450 Jun 14 19:23 /var/crash/_usr_bin_gnome-shell.121.crash