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238 lines
8.2 KiB
238 lines
8.2 KiB
#!/usr/bin/env python
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"""Process a ref debug log
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This file will process a log file created by the REF_DEBUG
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build option in Asterisk.
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See http://www.asterisk.org for more information about
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the Asterisk project. Please do not directly contact
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any of the maintainers of this project for assistance;
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the project provides a web site, mailing lists and IRC
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channels for your use.
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This program is free software, distributed under the terms of
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the GNU General Public License Version 2. See the LICENSE file
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at the top of the source tree.
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Copyright (C) 2014, Digium, Inc.
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Matt Jordan <mjordan@digium.com>
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"""
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import sys
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import os
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from optparse import OptionParser
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def parse_line(line):
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"""Parse out a line into its constituent parts.
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Keyword Arguments:
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line The line from a ref debug log to parse out
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Returns:
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A dictionary containing the options, or None
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"""
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tokens = line.strip().split(',', 7)
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if len(tokens) < 8:
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print "ERROR: ref debug line '%s' contains fewer tokens than " \
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"expected: %d" % (line.strip(), len(tokens))
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return None
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processed_line = {'addr': tokens[0],
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'delta': tokens[1],
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'thread_id': tokens[2],
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'file': tokens[3],
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'line': tokens[4],
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'function': tokens[5],
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'state': tokens[6],
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'tag': tokens[7],
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}
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return processed_line
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def process_file(options):
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"""The routine that kicks off processing a ref file
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Keyword Arguments:
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filename The full path to the file to process
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Returns:
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A tuple containing:
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- A list of objects whose lifetimes were completed
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(i.e., finished objects)
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- A list of objects referenced after destruction
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(i.e., invalid objects)
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- A list of objects whose lifetimes were not completed
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(i.e., leaked objects)
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- A list of objects whose lifetimes are skewed
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(i.e., Object history starting with an unusual ref count)
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"""
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finished_objects = []
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invalid_objects = []
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leaked_objects = []
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skewed_objects = []
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current_objects = {}
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filename = options.filepath
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with open(filename, 'r') as ref_file:
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for line in ref_file:
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parsed_line = parse_line(line)
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if not parsed_line:
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continue
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invalid = False
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obj = parsed_line['addr']
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if obj not in current_objects:
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current_objects[obj] = {'log': [], 'curcount': 1}
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if 'constructor' in parsed_line['state']:
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# This is the normal expected case
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pass
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elif 'invalid' in parsed_line['state']:
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invalid = True
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current_objects[obj]['curcount'] = 0
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if options.invalid:
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invalid_objects.append((obj, current_objects[obj]))
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elif 'destructor' in parsed_line['state']:
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current_objects[obj]['curcount'] = 0
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if options.skewed:
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skewed_objects.append((obj, current_objects[obj]))
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else:
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current_objects[obj]['curcount'] = int(
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parsed_line['state'])
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if options.skewed:
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skewed_objects.append((obj, current_objects[obj]))
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else:
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current_objects[obj]['curcount'] += int(parsed_line['delta'])
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current_objects[obj]['log'].append(
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"[%s] %s:%s %s: %s %s - [%s]" % (
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parsed_line['thread_id'],
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parsed_line['file'],
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parsed_line['line'],
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parsed_line['function'],
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parsed_line['delta'],
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parsed_line['tag'],
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parsed_line['state']))
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# It is possible for curcount to go below zero if someone
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# unrefs an object by two or more when there aren't that
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# many refs remaining. This condition abnormally finishes
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# the object.
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if current_objects[obj]['curcount'] <= 0:
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if current_objects[obj]['curcount'] < 0:
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current_objects[obj]['log'].append(
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"[%s] %s:%s %s: %s %s - [%s]" % (
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parsed_line['thread_id'],
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parsed_line['file'],
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parsed_line['line'],
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parsed_line['function'],
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"+0",
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"Object abnormally finalized",
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"**implied destructor**"))
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# Highlight the abnormally finished object in the
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# invalid section as well as reporting it in the normal
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# finished section.
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if options.invalid:
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invalid_objects.append((obj, current_objects[obj]))
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if not invalid and options.normal:
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finished_objects.append((obj, current_objects[obj]))
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del current_objects[obj]
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if options.leaks:
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for key, lines in current_objects.iteritems():
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leaked_objects.append((key, lines))
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return (finished_objects, invalid_objects, leaked_objects, skewed_objects)
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def print_objects(objects, prefix=""):
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"""Prints out the objects that were processed
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Keyword Arguments:
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objects A list of objects to print
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prefix A prefix to print that specifies something about
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this object
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"""
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print "======== %s Objects ========" % prefix
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print "\n"
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for obj in objects:
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print "==== %s Object %s history ====" % (prefix, obj[0])
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for line in obj[1]['log']:
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print line
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print "\n"
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def main(argv=None):
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"""Main entry point for the script"""
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ret_code = 0
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if argv is None:
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argv = sys.argv
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parser = OptionParser()
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parser.add_option("-f", "--file", action="store", type="string",
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dest="filepath", default="/var/log/asterisk/refs",
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help="The full path to the refs file to process")
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parser.add_option("-i", "--suppress-invalid", action="store_false",
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dest="invalid", default=True,
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help="If specified, don't output invalid object "
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"references")
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parser.add_option("-l", "--suppress-leaks", action="store_false",
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dest="leaks", default=True,
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help="If specified, don't output leaked objects")
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parser.add_option("-n", "--suppress-normal", action="store_false",
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dest="normal", default=True,
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help="If specified, don't output objects with a "
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"complete lifetime")
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parser.add_option("-s", "--suppress-skewed", action="store_false",
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dest="skewed", default=True,
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help="If specified, don't output objects with a "
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"skewed lifetime")
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(options, args) = parser.parse_args(argv)
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if not options.invalid and not options.leaks and not options.normal \
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and not options.skewed:
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print >>sys.stderr, "All options disabled"
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return -1
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if not os.path.isfile(options.filepath):
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print >>sys.stderr, "File not found: %s" % options.filepath
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return -1
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try:
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(finished_objects,
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invalid_objects,
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leaked_objects,
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skewed_objects) = process_file(options)
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if options.invalid and len(invalid_objects):
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print_objects(invalid_objects, "Invalid Referenced")
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ret_code |= 4
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if options.leaks and len(leaked_objects):
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print_objects(leaked_objects, "Leaked")
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ret_code |= 1
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if options.skewed and len(skewed_objects):
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print_objects(skewed_objects, "Skewed")
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ret_code |= 2
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if options.normal:
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print_objects(finished_objects, "Finalized")
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except (KeyboardInterrupt, SystemExit, IOError):
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print >>sys.stderr, "File processing cancelled"
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return -1
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return ret_code
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if __name__ == "__main__":
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sys.exit(main(sys.argv))
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