supersize: Track symbol aliases and shared symbols

tools/binary_size/libsupersize/helpers.py

 # Copyright 2017 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.
 
 """Utility methods."""
 
-import atexit
-import multiprocessing
 import os
-import threading
 
 
 SRC_ROOT = os.path.dirname(
     os.path.dirname(os.path.dirname(os.path.dirname(__file__))))
-
-
-def MakeProcessPool(*args):
-  """Wrapper for multiprocessing.Pool, with fix to terminate on exit."""
-  ret = multiprocessing.Pool(*args)
-  def close_pool():
-    ret.terminate()
-
-  def on_exit():
-    thread = threading.Thread(target=close_pool)
-    thread.daemon = True
-    thread.start()
-
-  # Without calling terminate() on a separate thread, the call can block
-  # forever.
-  atexit.register(on_exit)
-  return ret
-
-
-def ForkAndCall(func, *args, **kwargs):
-  """Uses multiprocessing to run the given function in a fork'ed process.
-
-  Returns:
-    A Result object (call .get() to get the return value)
-  """
-  pool_of_one = MakeProcessPool(1)
-  result = pool_of_one.apply_async(func, args=args, kwds=kwargs)
-  pool_of_one.close()
-  return result