Platforms/ADK/Thread/adk-mem-parse.py

   1 #!/usr/bin/env python3
   2 # Copyright (c) 2020 Apple Inc. All rights reserved.
   3 #
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at
   7 #
   8 #     http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15 #
  16
  17 # This code parses an ADK log with MALLOC_DEBUG_LOGGING and eliminates matching alloc/free pairs.
  18 # It then prints a list of all allocations that have not yet been freed, and the file and line
  19 # number where they were allocated.  This can be useful for detecting leaks, although not everything
  20 # printed will be a leak: it could just be live data.
  21
  22 import sys
  23 import re
  24
  25 allocations = {}
  26
  27 alloc_re = re.compile(r"^([0-9][0-9]*\.[0-9][0-9]*)\s+[A-Za-z][A-Za-z]*\s+(0x[0-9a-f][0-9a-f]*): (malloc|strdup|calloc)\((.*)\) at (.*)$")
  28 free_re = re.compile(r"^([0-9][0-9]*\.[0-9][0-9]*)\s+[A-Za-z][A-Za-z]*\s+(0x[0-9a-f][0-9a-f]*): (free)\((.*)\) at (.*)$")
  29
  30 for line in sys.stdin:
  31     line = line.strip()
  32     matches = alloc_re.match(line)
  33     if matches != None:
  34         allocations[matches.group(2)] = matches
  35     else:
  36         matches = free_re.match(line)
  37         if matches != None:
  38             if matches.group(2) in allocations:
  39                 del allocations[matches.group(2)]
  40             else:
  41                 print("mismatched free: ", line);
  42
  43 leaks = {}
  44 for key, value in allocations.items():
  45     if value.group(5) in leaks:
  46         leaks[value.group(5)].append(value)
  47     else:
  48         leaks[value.group(5)] = [value]
  49
  50 for key in sorted(leaks.keys()):
  51     print("\nPossible leaks at: ", key)
  52     for match in leaks[key]:
  53         print("  ", match.group(2), " ", match.group(3), " ", match.group(4))