build/android/adb_logcat_printer.py - cobalt - Git at Google

 #!/usr/bin/env python3
 #
 # Copyright 2012 The Chromium Authors
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

 """Shutdown adb_logcat_monitor and print accumulated logs.

 To test, call './adb_logcat_printer.py <base_dir>' where
 <base_dir> contains 'adb logcat -v threadtime' files named as
 logcat_<deviceID>_<sequenceNum>

 The script will print the files to out, and will combine multiple
 logcats from a single device if there is overlap.

 Additionally, if a <base_dir>/LOGCAT_MONITOR_PID exists, the script
 will attempt to terminate the contained PID by sending a SIGINT and
 monitoring for the deletion of the aforementioned file.
 """
 # pylint: disable=W0702

 import argparse
 import io
 import logging
 import os
 import re
 import signal
 import sys
 import time


 # Set this to debug for more verbose output
 LOG_LEVEL = logging.INFO


 def CombineLogFiles(list_of_lists, logger):
   """Splices together multiple logcats from the same device.

   Args:
     list_of_lists: list of pairs (filename, list of timestamped lines)
     logger: handler to log events

   Returns:
     list of lines with duplicates removed
   """
   cur_device_log = ['']
   for cur_file, cur_file_lines in list_of_lists:
     # Ignore files with just the logcat header
     if len(cur_file_lines) < 2:
       continue
     common_index = 0
     # Skip this step if list just has empty string
     if len(cur_device_log) > 1:
       try:
         line = cur_device_log[-1]
         # Used to make sure we only splice on a timestamped line
         if re.match(r'^\d{2}-\d{2} \d{2}:\d{2}:\d{2}.\d{3} ', line):
           common_index = cur_file_lines.index(line)
         else:
           logger.warning('splice error - no timestamp in "%s"?', line.strip())
       except ValueError:
         # The last line was valid but wasn't found in the next file
         cur_device_log += ['***** POSSIBLE INCOMPLETE LOGCAT *****']
         logger.info('Unable to splice %s. Incomplete logcat?', cur_file)

     cur_device_log += ['*'*30 + '  %s' % cur_file]
     cur_device_log.extend(cur_file_lines[common_index:])

   return cur_device_log


 def FindLogFiles(base_dir):
   """Search a directory for logcat files.

   Args:
     base_dir: directory to search

   Returns:
     Mapping of device_id to a sorted list of file paths for a given device
   """
   logcat_filter = re.compile(r'^logcat_(\S+)_(\d+)$')
   # list of tuples (<device_id>, <seq num>, <full file path>)
   filtered_list = []
   for cur_file in os.listdir(base_dir):
     matcher = logcat_filter.match(cur_file)
     if matcher:
       filtered_list += [(matcher.group(1), int(matcher.group(2)),
                          os.path.join(base_dir, cur_file))]
   filtered_list.sort()
   file_map = {}
   for device_id, _, cur_file in filtered_list:
     if device_id not in file_map:
       file_map[device_id] = []

     file_map[device_id] += [cur_file]
   return file_map


 def GetDeviceLogs(log_filenames, logger):
   """Read log files, combine and format.

   Args:
     log_filenames: mapping of device_id to sorted list of file paths
     logger: logger handle for logging events

   Returns:
     list of formatted device logs, one for each device.
   """
   device_logs = []

   for device, device_files in log_filenames.items():
     logger.debug('%s: %s', device, str(device_files))
     device_file_lines = []
     for cur_file in device_files:
       with open(cur_file) as f:
         device_file_lines += [(cur_file, f.read().splitlines())]
     combined_lines = CombineLogFiles(device_file_lines, logger)
     # Prepend each line with a short unique ID so it's easy to see
     # when the device changes.  We don't use the start of the device
     # ID because it can be the same among devices.  Example lines:
     # AB324:  foo
     # AB324:  blah
     device_logs += [('\n' + device[-5:] + ':  ').join(combined_lines)]
   return device_logs


 def ShutdownLogcatMonitor(base_dir, logger):
   """Attempts to shutdown adb_logcat_monitor and blocks while waiting."""
   try:
     monitor_pid_path = os.path.join(base_dir, 'LOGCAT_MONITOR_PID')
     with open(monitor_pid_path) as f:
       monitor_pid = int(f.readline())

     logger.info('Sending SIGTERM to %d', monitor_pid)
     os.kill(monitor_pid, signal.SIGTERM)
     i = 0
     while True:
       time.sleep(.2)
       if not os.path.exists(monitor_pid_path):
         return
       if not os.path.exists('/proc/%d' % monitor_pid):
         logger.warning('Monitor (pid %d) terminated uncleanly?', monitor_pid)
         return
       logger.info('Waiting for logcat process to terminate.')
       i += 1
       if i >= 10:
         logger.warning('Monitor pid did not terminate. Continuing anyway.')
         return

   except (ValueError, IOError, OSError):
     logger.exception('Error signaling logcat monitor - continuing')


 def main(argv):
   parser = argparse.ArgumentParser()
   parser.add_argument(
       '--output-path',
       help='Output file path (if unspecified, prints to stdout)')
   parser.add_argument('log_dir')
   args = parser.parse_args(argv)
   base_dir = args.log_dir

   log_stringio = io.StringIO()
   logger = logging.getLogger('LogcatPrinter')
   logger.setLevel(LOG_LEVEL)
   sh = logging.StreamHandler(log_stringio)
   sh.setFormatter(logging.Formatter('%(asctime)-2s %(levelname)-8s'
                                     ' %(message)s'))
   logger.addHandler(sh)

   if args.output_path:
     if not os.path.exists(os.path.dirname(args.output_path)):
       logger.warning('Output dir %s doesn\'t exist. Creating it.',
                      os.path.dirname(args.output_path))
       os.makedirs(os.path.dirname(args.output_path))
     output_file = open(args.output_path, 'w')
     logger.info(
         'Dumping logcat to local file %s. If running in a build, '
         'this file will likely will be uploaded to google storage '
         'in a later step. It can be downloaded from there.', args.output_path)
   else:
     output_file = sys.stdout

   try:
     # Wait at least 5 seconds after base_dir is created before printing.
     #
     # The idea is that 'adb logcat > file' output consists of 2 phases:
     #  1 Dump all the saved logs to the file
     #  2 Stream log messages as they are generated
     #
     # We want to give enough time for phase 1 to complete.  There's no
     # good method to tell how long to wait, but it usually only takes a
     # second.  On most bots, this code path won't occur at all, since
     # adb_logcat_monitor.py command will have spawned more than 5 seconds
     # prior to called this shell script.
     try:
       sleep_time = 5 - (time.time() - os.path.getctime(base_dir))
     except OSError:
       sleep_time = 5
     if sleep_time > 0:
       logger.warning('Monitor just started? Sleeping %.1fs', sleep_time)
       time.sleep(sleep_time)

     assert os.path.exists(base_dir), '%s does not exist' % base_dir
     ShutdownLogcatMonitor(base_dir, logger)
     separator = '\n' + '*' * 80 + '\n\n'
     for log in GetDeviceLogs(FindLogFiles(base_dir), logger):
       output_file.write(log)
       output_file.write(separator)
     with open(os.path.join(base_dir, 'eventlog')) as f:
       output_file.write('\nLogcat Monitor Event Log\n')
       output_file.write(f.read())
   except:
     logger.exception('Unexpected exception')

   logger.info('Done.')
   sh.flush()
   output_file.write('\nLogcat Printer Event Log\n')
   output_file.write(log_stringio.getvalue())

 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))
	#!/usr/bin/env python3
	#
	# Copyright 2012 The Chromium Authors
	# Use of this source code is governed by a BSD-style license that can be
	# found in the LICENSE file.

	"""Shutdown adb_logcat_monitor and print accumulated logs.

	To test, call './adb_logcat_printer.py <base_dir>' where
	<base_dir> contains 'adb logcat -v threadtime' files named as
	logcat_<deviceID>_<sequenceNum>

	The script will print the files to out, and will combine multiple
	logcats from a single device if there is overlap.

	Additionally, if a <base_dir>/LOGCAT_MONITOR_PID exists, the script
	will attempt to terminate the contained PID by sending a SIGINT and
	monitoring for the deletion of the aforementioned file.
	"""
	# pylint: disable=W0702

	import argparse
	import io
	import logging
	import os
	import re
	import signal
	import sys
	import time


	# Set this to debug for more verbose output
	LOG_LEVEL = logging.INFO


	def CombineLogFiles(list_of_lists, logger):
	"""Splices together multiple logcats from the same device.

	Args:
	list_of_lists: list of pairs (filename, list of timestamped lines)
	logger: handler to log events

	Returns:
	list of lines with duplicates removed
	"""
	cur_device_log = ['']
	for cur_file, cur_file_lines in list_of_lists:
	# Ignore files with just the logcat header
	if len(cur_file_lines) < 2:
	continue
	common_index = 0
	# Skip this step if list just has empty string
	if len(cur_device_log) > 1:
	try:
	line = cur_device_log[-1]
	# Used to make sure we only splice on a timestamped line
	if re.match(r'^\d{2}-\d{2} \d{2}:\d{2}:\d{2}.\d{3} ', line):
	common_index = cur_file_lines.index(line)
	else:
	logger.warning('splice error - no timestamp in "%s"?', line.strip())
	except ValueError:
	# The last line was valid but wasn't found in the next file
	cur_device_log += ['*** POSSIBLE INCOMPLETE LOGCAT ***']
	logger.info('Unable to splice %s. Incomplete logcat?', cur_file)

	cur_device_log += [''30 + ' %s' % cur_file]
	cur_device_log.extend(cur_file_lines[common_index:])

	return cur_device_log


	def FindLogFiles(base_dir):
	"""Search a directory for logcat files.

	Args:
	base_dir: directory to search

	Returns:
	Mapping of device_id to a sorted list of file paths for a given device
	"""
	logcat_filter = re.compile(r'^logcat_(\S+)_(\d+)$')
	# list of tuples (<device_id>, <seq num>, <full file path>)
	filtered_list = []
	for cur_file in os.listdir(base_dir):
	matcher = logcat_filter.match(cur_file)
	if matcher:
	filtered_list += [(matcher.group(1), int(matcher.group(2)),
	os.path.join(base_dir, cur_file))]
	filtered_list.sort()
	file_map = {}
	for device_id, _, cur_file in filtered_list:
	if device_id not in file_map:
	file_map[device_id] = []

	file_map[device_id] += [cur_file]
	return file_map


	def GetDeviceLogs(log_filenames, logger):
	"""Read log files, combine and format.

	Args:
	log_filenames: mapping of device_id to sorted list of file paths
	logger: logger handle for logging events

	Returns:
	list of formatted device logs, one for each device.
	"""
	device_logs = []

	for device, device_files in log_filenames.items():
	logger.debug('%s: %s', device, str(device_files))
	device_file_lines = []
	for cur_file in device_files:
	with open(cur_file) as f:
	device_file_lines += [(cur_file, f.read().splitlines())]
	combined_lines = CombineLogFiles(device_file_lines, logger)
	# Prepend each line with a short unique ID so it's easy to see
	# when the device changes. We don't use the start of the device
	# ID because it can be the same among devices. Example lines:
	# AB324: foo
	# AB324: blah
	device_logs += [('\n' + device[-5:] + ': ').join(combined_lines)]
	return device_logs


	def ShutdownLogcatMonitor(base_dir, logger):
	"""Attempts to shutdown adb_logcat_monitor and blocks while waiting."""
	try:
	monitor_pid_path = os.path.join(base_dir, 'LOGCAT_MONITOR_PID')
	with open(monitor_pid_path) as f:
	monitor_pid = int(f.readline())

	logger.info('Sending SIGTERM to %d', monitor_pid)
	os.kill(monitor_pid, signal.SIGTERM)
	i = 0
	while True:
	time.sleep(.2)
	if not os.path.exists(monitor_pid_path):
	return
	if not os.path.exists('/proc/%d' % monitor_pid):
	logger.warning('Monitor (pid %d) terminated uncleanly?', monitor_pid)
	return
	logger.info('Waiting for logcat process to terminate.')
	i += 1
	if i >= 10:
	logger.warning('Monitor pid did not terminate. Continuing anyway.')
	return

	except (ValueError, IOError, OSError):
	logger.exception('Error signaling logcat monitor - continuing')


	def main(argv):
	parser = argparse.ArgumentParser()
	parser.add_argument(
	'--output-path',
	help='Output file path (if unspecified, prints to stdout)')
	parser.add_argument('log_dir')
	args = parser.parse_args(argv)
	base_dir = args.log_dir

	log_stringio = io.StringIO()
	logger = logging.getLogger('LogcatPrinter')
	logger.setLevel(LOG_LEVEL)
	sh = logging.StreamHandler(log_stringio)
	sh.setFormatter(logging.Formatter('%(asctime)-2s %(levelname)-8s'
	' %(message)s'))
	logger.addHandler(sh)

	if args.output_path:
	if not os.path.exists(os.path.dirname(args.output_path)):
	logger.warning('Output dir %s doesn\'t exist. Creating it.',
	os.path.dirname(args.output_path))
	os.makedirs(os.path.dirname(args.output_path))
	output_file = open(args.output_path, 'w')
	logger.info(
	'Dumping logcat to local file %s. If running in a build, '
	'this file will likely will be uploaded to google storage '
	'in a later step. It can be downloaded from there.', args.output_path)
	else:
	output_file = sys.stdout

	try:
	# Wait at least 5 seconds after base_dir is created before printing.
	#
	# The idea is that 'adb logcat > file' output consists of 2 phases:
	# 1 Dump all the saved logs to the file
	# 2 Stream log messages as they are generated
	#
	# We want to give enough time for phase 1 to complete. There's no
	# good method to tell how long to wait, but it usually only takes a
	# second. On most bots, this code path won't occur at all, since
	# adb_logcat_monitor.py command will have spawned more than 5 seconds
	# prior to called this shell script.
	try:
	sleep_time = 5 - (time.time() - os.path.getctime(base_dir))
	except OSError:
	sleep_time = 5
	if sleep_time > 0:
	logger.warning('Monitor just started? Sleeping %.1fs', sleep_time)
	time.sleep(sleep_time)

	assert os.path.exists(base_dir), '%s does not exist' % base_dir
	ShutdownLogcatMonitor(base_dir, logger)
	separator = '\n' + '' 80 + '\n\n'
	for log in GetDeviceLogs(FindLogFiles(base_dir), logger):
	output_file.write(log)
	output_file.write(separator)
	with open(os.path.join(base_dir, 'eventlog')) as f:
	output_file.write('\nLogcat Monitor Event Log\n')
	output_file.write(f.read())
	except:
	logger.exception('Unexpected exception')

	logger.info('Done.')
	sh.flush()
	output_file.write('\nLogcat Printer Event Log\n')
	output_file.write(log_stringio.getvalue())

	if __name__ == '__main__':
	sys.exit(main(sys.argv[1:]))