A tool for mapping runtime addresses to symbol names.

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())