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      1 # Copyright 2016 The Chromium OS Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 import time
      6 import common
      7 from autotest_lib.client.common_lib import error
      8 from autotest_lib.server import test
      9 
     10 # Process to kill for log-generation purposes.
     11 TARGET_PROCESS = 'weaved'
     12 # Number of seconds to wait for host.run commands to timeout.
     13 COMMAND_TIMEOUT_SECONDS = 10
     14 # Number of times to retry the command the ls command to find logs.
     15 LOG_LIST_RETRIES = 5
     16 
     17 class brillo_CrashLogging(test.test):
     18     """Confirm that crash logs are generated for native crashes."""
     19     version = 1
     20 
     21 
     22     def run_once(self, host=None):
     23         """Confirm that crash logs are generated for native crashes.
     24 
     25         @param host: host object representing the device under test.
     26         """
     27         if host is None:
     28             raise error.TestFail('brillo_Crashlogging test executed without '
     29                                  'a host')
     30         self.host = host
     31 
     32         # Remove any existing crash logs.
     33         self.host.run('rm /data/misc/crash_reporter/crash/*',
     34                       timeout=COMMAND_TIMEOUT_SECONDS, ignore_status=True)
     35 
     36         # Find and kill a process.
     37         result = self.host.run('pgrep %s' % TARGET_PROCESS,
     38                                timeout=COMMAND_TIMEOUT_SECONDS)
     39         pid = result.stdout.strip()
     40         if not len(pid):
     41             raise error.TestFail('No %s process found to kill' % TARGET_PROCESS)
     42         self.host.run('kill -SIGSEGV %s' % pid, timeout=COMMAND_TIMEOUT_SECONDS)
     43         # If the process links against bionic, then the first kill will be
     44         # caught by bionic, so issue the command twice.
     45         self.host.run('kill -SIGSEGV %s' % pid, timeout=COMMAND_TIMEOUT_SECONDS,
     46                       ignore_status=True)
     47         logs = None
     48         for _ in xrange(LOG_LIST_RETRIES):
     49             try:
     50                 logs = self.host.run_output(
     51                         'ls /data/misc/crash_reporter/crash',
     52                         timeout=COMMAND_TIMEOUT_SECONDS).split()
     53             except (error.GenericHostRunError, error.AutoservSSHTimeout,
     54                     error.CmdTimeoutError):
     55                 raise error.TestFail('No crash logs were created because of a '
     56                                      'host error or because the directory '
     57                                      'where crash logs are written to does not '
     58                                      'exist on the DUT.')
     59             if logs:
     60                 break
     61             time.sleep(1)
     62 
     63         if not logs:
     64             raise error.TestFail('No crash logs were created.')
     65