Purge unpinned ashmem before parsing /proc/$pid/smaps.

tools/telemetry/telemetry/core/backends/adb_commands.py

 # Copyright 2013 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.
 """Brings in Chrome Android's android_commands module, which itself is a
 thin(ish) wrapper around adb."""
 
 import logging
 import os
 import shutil
 import stat
@@ skipping 170 matching lines @@
     has_prebuilt = abi and abi[0].startswith('armeabi')
   if not has_prebuilt:
     logging.error('Prebuilt tools only available for ARM.')
     return False
 
   prebuilt_tools = [
       'forwarder_dist/device_forwarder',
       'host_forwarder',
       'md5sum_dist/md5sum_bin',
       'md5sum_bin_host',
+      'purge_ashmem',
   ]
   for t in prebuilt_tools:
     src = os.path.basename(t)
     android_prebuilt_profiler_helper.GetIfChanged(src)
     dest = os.path.join(constants.GetOutDirectory(), t)
     if not os.path.exists(dest):
       logging.warning('Setting up prebuilt %s', dest)
       if not os.path.exists(os.path.dirname(dest)):
         os.makedirs(os.path.dirname(dest))
       shutil.copyfile(android_prebuilt_profiler_helper.GetHostPath(src), dest)
@@ skipping 29 matching lines @@
       raise Exception('Build forwarder2')
     forwarder.Forwarder.Map(new_port_pairs, self._adb)
 
   @property
   def url(self):
     return 'http://127.0.0.1:%i' % self._host_port
 
   def Close(self):
     for (device_port, _) in self._port_pairs:
       forwarder.Forwarder.UnmapDevicePort(device_port, self._adb)