oeqa/runtime: fix race-condition in minidebuginfo test

Fix this error where 'coredumpctl info' warns that the coredump is still being
processed:

```
AssertionError: 1 != 0 : MiniDebugInfo Test failed: No match found.
-- Notice: 1 systemd-coredump@.service unit is running, output may be incomplete.
```

(From OE-Core rev: ad1ce64f5c1f22a7b10025d8cba20dc74354ac81)

(From OE-Core rev: ed562345d5a5f2edb649028553199f3f7966e19e)

Signed-off-by: Etienne Cordonnier <ecordonnier@snap.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 13 insertions, 4 deletions

diff --git a/meta/lib/oeqa/runtime/cases/systemd.py b/meta/lib/oeqa/runtime/cases/systemd.py
index 80fdae240a..640f28abe9 100644
--- a/meta/lib/oeqa/runtime/cases/systemd.py
+++ b/meta/lib/oeqa/runtime/cases/systemd.py
@@ -150,12 +150,21 @@ class SystemdServiceTests(SystemdTest):
         t_thread.start()
         time.sleep(1)
 
-        status, output = self.target.run('pidof sleep')
+        status, sleep_pid = self.target.run('pidof sleep')
         # cause segfault on purpose
-        self.target.run('kill -SEGV %s' % output)
-        self.assertEqual(status, 0, msg = 'Not able to find process that runs sleep, output : %s' % output)
+        self.target.run('kill -SEGV %s' % sleep_pid)
+        self.assertEqual(status, 0, msg = 'Not able to find process that runs sleep, output : %s' % sleep_pid)
 
-        (status, output) = self.target.run('coredumpctl info')
+        # Give some time to systemd-coredump@.service to process the coredump
+        for x in range(20):
+            status, output = self.target.run('coredumpctl list %s' % sleep_pid)
+            if status == 0:
+                break
+            time.sleep(1)
+        else:
+            self.fail("Timed out waiting for coredump creation")
+
+        (status, output) = self.target.run('coredumpctl info %s' % sleep_pid)
         self.assertEqual(status, 0, msg='MiniDebugInfo Test failed: %s' % output)
         self.assertEqual('sleep_for_duration (busybox.nosuid' in output or 'xnanosleep (sleep.coreutils' in output,
                          True, msg='Call stack is missing minidebuginfo symbols (functions shown as "n/a"): %s' % output)