oeqa/runtime/ptest: Ensure OOM errors are logged

Currently processed being killed by the OOM killer may not be spotted by
ptest-runner. After we complete the tests, check the logs and report if there
were any. This ensures the user is aware of OOM conditions affecting the
ptest results.

(From OE-Core rev: 20a441d53817f80e0ce1597e77f6e794422ac49a)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/runtime/cases/ptest.py

@@ -70,5 +70,13 @@ class PtestRunnerTest(OERuntimeTestCase):
             if failed_testcases:
                 failed_tests[section] = failed_testcases
 
+        failmsg = ""
+        status, output = self.target.run('dmesg | grep "Killed process"', 0)
+        if output:
+            failmsg = "ERROR: Processes were killed by the OOM Killer:\n%s\n" % output
+
         if failed_tests:
-            self.fail("Failed ptests:\n%s" % pprint.pformat(failed_tests))
+            failmsg = failmsg + "Failed ptests:\n%s" % pprint.pformat(failed_tests)
+
+        if failmsg:
+            self.fail(failmsg)