tests/coredump-options: test core dump generation

The needed changes in the base are now in edge and beta core24
channels: make sure we are generating the core dumps.

tests/core/coredump-options/task.yaml

@@ -6,16 +6,21 @@ details: |
 
 systems: [-ubuntu-core-1*, -ubuntu-core-20*, -ubuntu-core-22*]
 
+restore: |
+  rm -f /var/lib/systemd/coredump/*
+
 execute: |
   cfg_path=/etc/systemd/coredump.conf.d/ubuntu-core.conf
 
   # coredumps should be initially disabled
   expect=$(printf "[Coredump]\nStorage=none\nProcessSizeMax=0\n")
   test "$expect" = "$(cat $cfg_path)"
 
-  # TODO no coredumps are dropped, but we get a journal entry. Depends
-  # on https://github.com/snapcore/core-base/pull/227 being in the
-  # installed core24 channel already.
+  # try to generate dump
+  sleep 5 & pkill -ABRT sleep; wait $! || true
+  coredumpctl | MATCH 'none */usr/bin/sleep'
+  # This cleans-up the coredumctl list
+  sudo journalctl --rotate; sudo journalctl --vacuum-time=1ms
 
   # enable coredump with a max use size
   max_use=10M
@@ -25,13 +30,16 @@ execute: |
   expect=$(printf "[Coredump]\nStorage=external\nMaxUse=%s\n" "$max_use")
   test "$expect" = "$(cat $cfg_path)"
 
-  # TODO Generate a core dump. Depends on
-  # https://github.com/snapcore/core-base/pull/227 too.
+  # Force generation of core dump and check it is present
+  sleep 5 & pkill -ABRT sleep; wait $! || true
+  coredumpctl | MATCH 'present */usr/bin/sleep'
+  coredumpctl dump --output=core
+  test -s core
+  # This cleans-up the coredumctl list and the core dump
+  sudo journalctl --rotate; sudo journalctl --vacuum-time=1ms
+  rm /var/lib/systemd/coredump/*
 
   # Finally, disable again
-  snap set system system.coredump.enable=false
+  snap set system system.coredump.enable=true
   expect=$(printf "[Coredump]\nStorage=none\nProcessSizeMax=0\n")
   test "$expect" = "$(cat $cfg_path)"
-
-  # TODO no coredumps are dropped, but we get a journal entry
-  # Depends on https://github.com/snapcore/core-base/pull/227 too.