203 lines
6.6 KiB
Python
203 lines
6.6 KiB
Python
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#!/usr/bin/env python
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#
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# Copyright (c) 2012 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""Shutdown adb_logcat_monitor and print accumulated logs.
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To test, call './adb_logcat_printer.py <base_dir>' where
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<base_dir> contains 'adb logcat -v threadtime' files named as
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logcat_<deviceID>_<sequenceNum>
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The script will print the files to out, and will combine multiple
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logcats from a single device if there is overlap.
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Additionally, if a <base_dir>/LOGCAT_MONITOR_PID exists, the script
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will attempt to terminate the contained PID by sending a SIGINT and
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monitoring for the deletion of the aforementioned file.
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"""
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import cStringIO
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import logging
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import os
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import re
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import signal
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import sys
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import time
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# Set this to debug for more verbose output
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LOG_LEVEL = logging.INFO
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def CombineLogFiles(list_of_lists, logger):
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"""Splices together multiple logcats from the same device.
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Args:
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list_of_lists: list of pairs (filename, list of timestamped lines)
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logger: handler to log events
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Returns:
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list of lines with duplicates removed
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"""
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cur_device_log = ['']
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for cur_file, cur_file_lines in list_of_lists:
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# Ignore files with just the logcat header
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if len(cur_file_lines) < 2:
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continue
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common_index = 0
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# Skip this step if list just has empty string
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if len(cur_device_log) > 1:
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try:
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line = cur_device_log[-1]
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# Used to make sure we only splice on a timestamped line
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if re.match('^\d{2}-\d{2} \d{2}:\d{2}:\d{2}.\d{3} ', line):
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common_index = cur_file_lines.index(line)
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else:
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logger.warning('splice error - no timestamp in "%s"?', line.strip())
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except ValueError:
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# The last line was valid but wasn't found in the next file
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cur_device_log += ['***** POSSIBLE INCOMPLETE LOGCAT *****']
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logger.info('Unable to splice %s. Incomplete logcat?', cur_file)
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cur_device_log += ['*'*30 + ' %s' % cur_file]
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cur_device_log.extend(cur_file_lines[common_index:])
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return cur_device_log
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def FindLogFiles(base_dir):
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"""Search a directory for logcat files.
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Args:
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base_dir: directory to search
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Returns:
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Mapping of device_id to a sorted list of file paths for a given device
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"""
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logcat_filter = re.compile('^logcat_(\w+)_(\d+)$')
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# list of tuples (<device_id>, <seq num>, <full file path>)
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filtered_list = []
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for cur_file in os.listdir(base_dir):
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matcher = logcat_filter.match(cur_file)
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if matcher:
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filtered_list += [(matcher.group(1), int(matcher.group(2)),
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os.path.join(base_dir, cur_file))]
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filtered_list.sort()
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file_map = {}
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for device_id, _, cur_file in filtered_list:
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if not device_id in file_map:
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file_map[device_id] = []
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file_map[device_id] += [cur_file]
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return file_map
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def GetDeviceLogs(log_filenames, logger):
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"""Read log files, combine and format.
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Args:
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log_filenames: mapping of device_id to sorted list of file paths
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logger: logger handle for logging events
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Returns:
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list of formatted device logs, one for each device.
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"""
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device_logs = []
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for device, device_files in log_filenames.iteritems():
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logger.debug('%s: %s', device, str(device_files))
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device_file_lines = []
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for cur_file in device_files:
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with open(cur_file) as f:
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device_file_lines += [(cur_file, f.read().splitlines())]
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combined_lines = CombineLogFiles(device_file_lines, logger)
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# Prepend each line with a short unique ID so it's easy to see
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# when the device changes. We don't use the start of the device
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# ID because it can be the same among devices. Example lines:
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# AB324: foo
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# AB324: blah
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device_logs += [('\n' + device[-5:] + ': ').join(combined_lines)]
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return device_logs
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def ShutdownLogcatMonitor(base_dir, logger):
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"""Attempts to shutdown adb_logcat_monitor and blocks while waiting."""
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try:
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monitor_pid_path = os.path.join(base_dir, 'LOGCAT_MONITOR_PID')
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with open(monitor_pid_path) as f:
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monitor_pid = int(f.readline())
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logger.info('Sending SIGTERM to %d', monitor_pid)
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os.kill(monitor_pid, signal.SIGTERM)
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i = 0
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while True:
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time.sleep(.2)
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if not os.path.exists(monitor_pid_path):
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return
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if not os.path.exists('/proc/%d' % monitor_pid):
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logger.warning('Monitor (pid %d) terminated uncleanly?', monitor_pid)
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return
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logger.info('Waiting for logcat process to terminate.')
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i += 1
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if i >= 10:
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logger.warning('Monitor pid did not terminate. Continuing anyway.')
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return
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except (ValueError, IOError, OSError):
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logger.exception('Error signaling logcat monitor - continuing')
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def main(base_dir, output_file):
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log_stringio = cStringIO.StringIO()
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logger = logging.getLogger('LogcatPrinter')
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logger.setLevel(LOG_LEVEL)
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sh = logging.StreamHandler(log_stringio)
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sh.setFormatter(logging.Formatter('%(asctime)-2s %(levelname)-8s'
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' %(message)s'))
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logger.addHandler(sh)
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try:
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# Wait at least 5 seconds after base_dir is created before printing.
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#
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# The idea is that 'adb logcat > file' output consists of 2 phases:
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# 1 Dump all the saved logs to the file
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# 2 Stream log messages as they are generated
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#
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# We want to give enough time for phase 1 to complete. There's no
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# good method to tell how long to wait, but it usually only takes a
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# second. On most bots, this code path won't occur at all, since
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# adb_logcat_monitor.py command will have spawned more than 5 seconds
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# prior to called this shell script.
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try:
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sleep_time = 5 - (time.time() - os.path.getctime(base_dir))
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except OSError:
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sleep_time = 5
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if sleep_time > 0:
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logger.warning('Monitor just started? Sleeping %.1fs', sleep_time)
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time.sleep(sleep_time)
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assert os.path.exists(base_dir), '%s does not exist' % base_dir
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ShutdownLogcatMonitor(base_dir, logger)
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separator = '\n' + '*' * 80 + '\n\n'
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for log in GetDeviceLogs(FindLogFiles(base_dir), logger):
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output_file.write(log)
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output_file.write(separator)
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with open(os.path.join(base_dir, 'eventlog')) as f:
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output_file.write('\nLogcat Monitor Event Log\n')
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output_file.write(f.read())
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except:
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logger.exception('Unexpected exception')
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logger.info('Done.')
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sh.flush()
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output_file.write('\nLogcat Printer Event Log\n')
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output_file.write(log_stringio.getvalue())
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if __name__ == '__main__':
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if len(sys.argv) == 1:
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print 'Usage: %s <base_dir>' % sys.argv[0]
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sys.exit(1)
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sys.exit(main(sys.argv[1], sys.stdout))
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