kernel_BootMessagesServer: initial add of new test

client/bin/site_utils.py

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import logging, os, platform, time
 from autotest_lib.client.common_lib import error
 
 
 class TimeoutError(error.TestError):
     """Error raised when we time out when waiting on a condition."""
@@ skipping 43 matching lines @@
     """
     # The QEMU monitor has been redirected to the guest serial port located at
     # /dev/ttyUSB0. To save the state of the VM, we just send the 'savevm'
     # command to the serial port.
     proc = platform.processor()
     if 'QEMU' in proc and os.path.exists('/dev/ttyUSB0'):
         logging.info('Saving VM state "%s"' % checkpoint)
         serial = open('/dev/ttyUSB0', 'w')
         serial.write("savevm %s\r\n" % checkpoint)
         logging.info('Done saving VM state "%s"' % checkpoint)
+
+
+def check_raw_dmesg(dmesg, message_level, whitelist):
+    """Checks dmesg for unexpected warnings.
+
+    This function parses dmesg for message with message_level <= message_level
+    which do not appear in the whitelist.
+
+    Arguments:
+      dmesg - string containing raw dmesg buffer
+      message_level - minimum message priority to check
+      whitelist - messages to ignore
+
+    Returns:
+      List of unexpected warnings
+    """
+
+    unexpected = []
+    for line in dmesg.splitlines():
+        if int(line[1]) <= message_level:
+            if not 'used greatest stack depth' in line:
+                stripped_line = line.split('] ', 1)[1]
+                if not stripped_line in whitelist:
+                    unexpected.append(stripped_line)
+    return unexpected