def _LogSystemStatistics(log_file_name):
statistics_log = runner_logs.FileStreamFor(log_file_name)
# Log the cpu load and process information.
subprocess.call(['top', '-b', '-n', '1'],
stdin=open(os.devnull),
stdout=statistics_log,
stderr=subprocess.STDOUT)
subprocess.call(['ps', '-ax'],
stdin=open(os.devnull),
stdout=statistics_log,
stderr=subprocess.STDOUT)
def _WaitUntilReady(self):
logging.info('Connecting to Fuchsia using SSH.')
host, port = self._GetEndpoint()
end_time = time.time() + _ATTACH_RETRY_SECONDS
ssh_diagnostic_log = runner_logs.FileStreamFor('ssh_diagnostic_log')
while time.time() < end_time:
runner = remote_cmd.CommandRunner(self._GetSshConfigPath(), host, port)
ssh_proc = runner.RunCommandPiped(['true'],
ssh_args=['-v'],
stdout=ssh_diagnostic_log,
stderr=subprocess.STDOUT)
if ssh_proc.wait() == 0:
logging.info('Connected!')
self._started = True
return True
time.sleep(_ATTACH_RETRY_INTERVAL)
logging.error('Timeout limit reached.')
raise FuchsiaTargetException('Couldn\'t connect using SSH.')
def Start(self):
emu_command = self._BuildCommand()
# We pass a separate stdin stream. Sharing stdin across processes
# leads to flakiness due to the OS prematurely killing the stream and the
# Python script panicking and aborting.
# The precise root cause is still nebulous, but this fix works.
# See crbug.com/741194.
logging.debug('Launching %s.' % (self._GetEmulatorName()))
logging.debug(' '.join(emu_command))
# Zircon sends debug logs to serial port (see kernel.serial=legacy flag
# above). Serial port is redirected to a file through emulator stdout.
# If runner_logs are not enabled, we output the kernel serial log
# to a temporary file, and print that out if we are unable to connect to
# the emulator guest, to make it easier to diagnose connectivity issues.
temporary_log_file = None
if runner_logs.IsEnabled():
stdout = runner_logs.FileStreamFor('serial_log')
else:
temporary_log_file = tempfile.NamedTemporaryFile('w')
stdout = temporary_log_file
# TODO(crbug.com/1100402): Delete when no longer needed for debug info.
# Log system statistics at the start of the emulator run.
_LogSystemStatistics('system_start_statistics_log')
self._emu_process = subprocess.Popen(emu_command,
stdin=open(os.devnull),
stdout=stdout,
stderr=subprocess.STDOUT,
env=self._SetEnv())
try:
self._WaitUntilReady()
except target.FuchsiaTargetException:
if temporary_log_file:
logging.info('Kernel logs:\n' +
open(temporary_log_file.name, 'r').read())
raise
def _LogProcessStatistics(log_file_name):
statistics_log = runner_logs.FileStreamFor(log_file_name)
subprocess.call(['cat', '/proc/stat'],
stdin=open(os.devnull),
stdout=statistics_log,
stderr=subprocess.STDOUT)
