Classify memory usage by allocated type in Deep Memory Profiler.

tools/find_runtime_symbols/parse_proc_maps.py

-#!/usr/bin/env python
-# Copyright (c) 2012 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-import re
-import sys
-
-
-_MAPS_PATTERN = re.compile(
-    '^([a-f0-9]+)-([a-f0-9]+)\s+(.)(.)(.)(.)\s+([a-f0-9]+)\s+(\S+):(\S+)\s+'
-    '(\d+)\s+(\S+)$', re.IGNORECASE)
-
-
-class ProcMapsEntry(object):
-  """A class representing one line in /proc/.../maps."""
-
-  def __init__(
-      self, begin, end, readable, writable, executable, private, offset,
-      major, minor, inode, name):
-    self.begin = begin
-    self.end = end
-    self.readable = readable
-    self.writable = writable
-    self.executable = executable
-    self.private = private
-    self.offset = offset
-    self.major = major
-    self.minor = minor
-    self.inode = inode
-    self.name = name
-
-
-class ProcMaps(object):
-  """A class representing contents in /proc/.../maps."""
-
-  def __init__(self):
-    self._sorted_indexes = []
-    self._dictionary = {}
-    self._sorted = True
-
-  def append(self, entry):
-    if self._sorted_indexes and self._sorted_indexes[-1] > entry.begin:
-      self._sorted = False
-    self._sorted_indexes.append(entry.begin)
-    self._dictionary[entry.begin] = entry
-
-  def iter(self, condition):
-    if not self._sorted:
-      self._sorted_indexes.sort()
-      self._sorted = True
-    for index in self._sorted_indexes:
-      if not condition or condition(self._dictionary[index]):
-        yield self._dictionary[index]
-
-  def __iter__(self):
-    if not self._sorted:
-      self._sorted_indexes.sort()
-      self._sorted = True
-    for index in self._sorted_indexes:
-      yield self._dictionary[index]
-
-
-def parse_proc_maps(f):
-  table = ProcMaps()
-  for line in f:
-    matched = _MAPS_PATTERN.match(line)
-    if matched:
-      table.append(ProcMapsEntry(
-          int(matched.group(1), 16),  # begin
-          int(matched.group(2), 16),  # end
-          matched.group(3),           # readable
-          matched.group(4),           # writable
-          matched.group(5),           # executable
-          matched.group(6),           # private
-          int(matched.group(7), 16),  # offset
-          matched.group(8),           # major
-          matched.group(9),           # minor
-          int(matched.group(10), 10), # inode
-          matched.group(11)           # name
-          ))
-
-  return table
-
-
-def main():
-  if len(sys.argv) < 2:
-    sys.stderr.write("""Usage:
-%s /path/to/maps
-""" % sys.argv[0])
-    return 1
-
-  with open(sys.argv[1], mode='r') as f:
-    maps = parse_proc_maps(f)
-
-  for entry in maps:
-    print "%016x-%016x +%06x %s" % (
-        entry.begin, entry.end, entry.offset, entry.name)
-
-  return 0
-
-
-if __name__ == '__main__':
-  sys.exit(main())