author mats.palmgren@bredband.net
Fri, 27 Apr 2007 04:06:22 -0700
changeset 867 77a55fdcc9291735905f4dd17bb506badd4daeb2
parent 1 9b2a99adc05e53cd4010de512f50118594756650
permissions -rwxr-xr-x
Crash [@ nsPresContext::GetContainerInternal]. b=378682 r+sr=bzbarsky

# Version: MPL 1.1/GPL 2.0/LGPL 2.1
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
# The Original Code is standalone Firefox Windows performance test.
# The Initial Developer of the Original Code is Google Inc.
# Portions created by the Initial Developer are Copyright (C) 2006
# the Initial Developer. All Rights Reserved.
# Contributor(s):
#   Annie Sullivan <annie.sullivan@gmail.com> (original author)
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
# ***** END LICENSE BLOCK *****

"""A set of functions for process management on Windows.

__author__ = 'annie.sullivan@gmail.com (Annie Sullivan)'

import msvcrt
import os
import re
import time
import win32api
import win32file
import win32pdhutil
import win32pipe

import paths

def GetCygwinPath(dos_path):
  """Helper function to get the Cygwin path from a dos path.
     Used to generate a Firefox command line piped through the
     Cygwin bash shell

    dos_path: String containing the dos path

    String containing the cygwin path

  # Convert the path to a cygwin path. Assumes the path starts with
  # /cygdrive/driveletter
  cygwin_path = '/' + dos_path[3:]                       # Remove 'C:\'
  cygwin_path = cygwin_path.replace('\\', '/')           # Backslashes->slashes
  cygwin_path = cygwin_path.replace(' ', '\\ ')          # Escape spaces
  cygwin_path = '/cygdrive/' + dos_path[0] + cygwin_path # Add drive letter
  return cygwin_path

def GenerateFirefoxCommandLine(firefox_path, profile_dir, url):
  """Generates the command line for a process to run Firefox, wrapped
     by cygwin so that we can read the output from dump() statements.

    firefox_path: String containing the path to the firefox exe to use
    profile_dir: String containing the directory of the profile to run Firefox in
    url: String containing url to start with.

  profile_arg = ''
  if profile_dir:
    profile_dir = profile_dir.replace('\\', '\\\\\\')
    profile_arg = '-profile %s' % profile_dir

  url_arg = ''
  if url:
    url_arg = '-url %s' % url

  cmd = '%s "%s %s %s"' % (paths.CYGWIN,
  return cmd

def SyncAndSleep():
  """Runs sync and sleeps for a few seconds between Firefox runs.
     Otherwise "Firefox is already running.." errors occur

  os.spawnl(os.P_WAIT, paths.SYNC)

def TerminateProcess(pid):
  """Helper function to terminate a process, given the pid

    pid: integer process id of the process to terminate.

  handle = win32api.OpenProcess(PROCESS_TERMINATE, False, pid)
  win32api.TerminateProcess(handle, -1)

def ProcessesWithNameExist(process_name):
  """Returns true if there are any processes running with the
     given name.  Useful to check whether a Firefox process is still running

    process_name: String containing the process name, i.e. "firefox"

    True if any processes with that name are running, False otherwise.

    pids = win32pdhutil.FindPerformanceAttributesByName(process_name, counter="ID Process")
    return len(pids) > 0
    # Might get an exception if there are no instances of the process running.
    return False

def TerminateAllProcesses(process_name):
  """Helper function to terminate all processes with the given process name

    process_name: String containing the process name, i.e. "firefox"

  # Get all the process ids of running instances of this process, and terminate them.
    pids = win32pdhutil.FindPerformanceAttributesByName(process_name, counter="ID Process")
    for pid in pids:
    # Might get an exception if there are no instances of the process running.

def NonBlockingReadProcessOutput(handle):
  """Does a non-blocking read from the output of the process
     with the given handle.

    handle: The process handle returned from os.popen()

    A tuple (bytes, output) containing the number of output
    bytes read, and the actual output.

  output = ""

    osfhandle = msvcrt.get_osfhandle(handle.fileno())
    (read, num_avail, num_message) = win32pipe.PeekNamedPipe(osfhandle, 0)
    if num_avail > 0:
      (error_code, output) = win32file.ReadFile(osfhandle, num_avail, None)

    return (num_avail, output)
    return (0, output)

def RunProcessAndWaitForOutput(command, process_name, output_regex, timeout):
  """Runs the given process and waits for the output that matches the given
     regular expression.  Stops if the process exits early or times out.

    command: String containing command to run
    process_name: Name of the process to run, in case it has to be killed
    output_regex: Regular expression to check against each output line.
                  If the output matches, the process is terminated and 
                  the function returns.
    timeout: Time to wait before terminating the process and returning

    A tuple (match, timedout) where match is the match of the regular 
    expression, and timed out is true if the process timed out and 
    false otherwise.

  # Start the process
  handle = os.popen(command)

  # Wait for it to print output, terminate, or time out.
  time_elapsed = 0
  output = ''
  interval = 2 # Wait 2 seconds in between checks

  while time_elapsed < timeout:
    time_elapsed += interval

    (bytes, current_output) = NonBlockingReadProcessOutput(handle)
    output += current_output

    result = output_regex.search(output)
    if result:
        return_val = result.group(1)
        return (return_val, False)
      except IndexError:
        # Didn't really match

  # Timed out.
  return (None, True)