tools/deep_memory_profiler/subcommands/stacktrace.py

   1 # Copyright 2013 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 import sys
   6
   7 from lib.subcommand import SubCommand
   8
   9
  10 class StacktraceCommand(SubCommand):
  11   def __init__(self):
  12     super(StacktraceCommand, self).__init__(
  13         'Usage: %prog stacktrace <dump>')
  14
  15   def do(self, sys_argv):
  16     _, args = self._parse_args(sys_argv, 1)
  17     dump_path = args[1]
  18     (bucket_set, dump) = SubCommand.load_basic_files(dump_path, False)
  19
  20     StacktraceCommand._output(dump, bucket_set, sys.stdout)
  21     return 0
  22
  23   @staticmethod
  24   def _output(dump, bucket_set, out):
  25     """Outputs a given stacktrace.
  26
  27     Args:
  28         bucket_set: A BucketSet object.
  29         out: A file object to output.
  30     """
  31     for bucket_id, virtual, committed, allocs, frees in dump.iter_stacktrace:
  32       bucket = bucket_set.get(bucket_id)
  33       if not bucket:
  34         continue
  35       out.write('%d %d %d %d ' % (virtual, committed, allocs, frees))
  36       for frame in bucket.symbolized_stackfunction:
  37         out.write(frame + ' ')
  38       out.write('\n')