testing/mochitest/runtests.py
author Ted Mielczarek <ted@mielczarek.org>
Fri, 15 May 2015 13:48:16 -0400
changeset 201211 b585afd5db9316c897ca3377588f4b8b7a89f7b0
parent 198148 4c6a0f776c320699597fd82c556a8742cfcda9e5
permissions -rw-r--r--
Bug 1165347 - Use retries for symbol uploads. r=gps, a=NPOTB

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

"""
Runs the Mochitest test harness.
"""

from __future__ import with_statement
import os
import sys
SCRIPT_DIR = os.path.abspath(os.path.realpath(os.path.dirname(__file__)))
sys.path.insert(0, SCRIPT_DIR);

import glob
import json
import mozcrash
import mozinfo
import mozprocess
import mozrunner
import optparse
import re
import shutil
import signal
import subprocess
import tempfile
import time
import traceback
import urllib2
import zipfile

from automationutils import environment, getDebuggerInfo, isURL, KeyValueParseError, parseKeyValue, processLeakLog, systemMemory, dumpScreen, ShutdownLeaks, printstatus
from datetime import datetime
from manifestparser import TestManifest
from mochitest_options import MochitestOptions
from mozprofile import Profile, Preferences
from mozprofile.permissions import ServerLocations
from urllib import quote_plus as encodeURIComponent

# This should use the `which` module already in tree, but it is
# not yet present in the mozharness environment
from mozrunner.utils import findInPath as which

# set up logging handler a la automation.py.in for compatability
import logging
log = logging.getLogger()
def resetGlobalLog():
  while log.handlers:
    log.removeHandler(log.handlers[0])
  handler = logging.StreamHandler(sys.stdout)
  log.setLevel(logging.INFO)
  log.addHandler(handler)
resetGlobalLog()

###########################
# Option for NSPR logging #
###########################

# Set the desired log modules you want an NSPR log be produced by a try run for, or leave blank to disable the feature.
# This will be passed to NSPR_LOG_MODULES environment variable. Try run will then put a download link for the log file
# on tbpl.mozilla.org.

NSPR_LOG_MODULES = ""

####################
# PROCESS HANDLING #
####################

def call(*args, **kwargs):
  """front-end function to mozprocess.ProcessHandler"""
  # TODO: upstream -> mozprocess
  # https://bugzilla.mozilla.org/show_bug.cgi?id=791383
  process = mozprocess.ProcessHandler(*args, **kwargs)
  process.run()
  return process.wait()

def killPid(pid):
  # see also https://bugzilla.mozilla.org/show_bug.cgi?id=911249#c58
  try:
    os.kill(pid, getattr(signal, "SIGKILL", signal.SIGTERM))
  except Exception, e:
    log.info("Failed to kill process %d: %s", pid, str(e))

if mozinfo.isWin:
  import ctypes, ctypes.wintypes, time, msvcrt

  def isPidAlive(pid):
    STILL_ACTIVE = 259
    PROCESS_QUERY_LIMITED_INFORMATION = 0x1000
    pHandle = ctypes.windll.kernel32.OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, 0, pid)
    if not pHandle:
      return False
    pExitCode = ctypes.wintypes.DWORD()
    ctypes.windll.kernel32.GetExitCodeProcess(pHandle, ctypes.byref(pExitCode))
    ctypes.windll.kernel32.CloseHandle(pHandle)
    return pExitCode.value == STILL_ACTIVE

else:
  import errno

  def isPidAlive(pid):
    try:
      # kill(pid, 0) checks for a valid PID without actually sending a signal
      # The method throws OSError if the PID is invalid, which we catch below.
      os.kill(pid, 0)

      # Wait on it to see if it's a zombie. This can throw OSError.ECHILD if
      # the process terminates before we get to this point.
      wpid, wstatus = os.waitpid(pid, os.WNOHANG)
      return wpid == 0
    except OSError, err:
      # Catch the errors we might expect from os.kill/os.waitpid,
      # and re-raise any others
      if err.errno == errno.ESRCH or err.errno == errno.ECHILD:
        return False
      raise
# TODO: ^ upstream isPidAlive to mozprocess

#######################
# HTTP SERVER SUPPORT #
#######################

class MochitestServer(object):
  "Web server used to serve Mochitests, for closer fidelity to the real web."

  def __init__(self, options):
    if isinstance(options, optparse.Values):
      options = vars(options)
    self._closeWhenDone = options['closeWhenDone']
    self._utilityPath = options['utilityPath']
    self._xrePath = options['xrePath']
    self._profileDir = options['profilePath']
    self.webServer = options['webServer']
    self.httpPort = options['httpPort']
    self.shutdownURL = "http://%(server)s:%(port)s/server/shutdown" % { "server" : self.webServer, "port" : self.httpPort }
    self.testPrefix = "'webapprt_'" if options.get('webapprtContent') else "undefined"

    if options.get('httpdPath'):
        self._httpdPath = options['httpdPath']
    else:
        self._httpdPath = SCRIPT_DIR
    self._httpdPath = os.path.abspath(self._httpdPath)

  def start(self):
    "Run the Mochitest server, returning the process ID of the server."

    # get testing environment
    env = environment(xrePath=self._xrePath)
    env["XPCOM_DEBUG_BREAK"] = "warn"

    # When running with an ASan build, our xpcshell server will also be ASan-enabled,
    # thus consuming too much resources when running together with the browser on
    # the test slaves. Try to limit the amount of resources by disabling certain
    # features.
    env["ASAN_OPTIONS"] = "quarantine_size=1:redzone=32:malloc_context_size=5"

    if mozinfo.isWin:
      env["PATH"] = env["PATH"] + ";" + str(self._xrePath)

    args = ["-g", self._xrePath,
            "-v", "170",
            "-f", os.path.join(self._httpdPath, "httpd.js"),
            "-e", """const _PROFILE_PATH = '%(profile)s'; const _SERVER_PORT = '%(port)s'; const _SERVER_ADDR = '%(server)s'; const _TEST_PREFIX = %(testPrefix)s; const _DISPLAY_RESULTS = %(displayResults)s;""" %
                   {"profile" : self._profileDir.replace('\\', '\\\\'), "port" : self.httpPort, "server" : self.webServer,
                    "testPrefix" : self.testPrefix, "displayResults" : str(not self._closeWhenDone).lower() },
            "-f", os.path.join(SCRIPT_DIR, "server.js")]

    xpcshell = os.path.join(self._utilityPath,
                            "xpcshell" + mozinfo.info['bin_suffix'])
    command = [xpcshell] + args
    self._process = mozprocess.ProcessHandler(command, cwd=SCRIPT_DIR, env=env)
    self._process.run()
    log.info("%s : launching %s", self.__class__.__name__, command)
    pid = self._process.pid
    log.info("runtests.py | Server pid: %d", pid)

  def ensureReady(self, timeout):
    assert timeout >= 0

    aliveFile = os.path.join(self._profileDir, "server_alive.txt")
    i = 0
    while i < timeout:
      if os.path.exists(aliveFile):
        break
      time.sleep(1)
      i += 1
    else:
      log.error("TEST-UNEXPECTED-FAIL | runtests.py | Timed out while waiting for server startup.")
      self.stop()
      sys.exit(1)

  def stop(self):
    try:
      with urllib2.urlopen(self.shutdownURL) as c:
        c.read()

      # TODO: need ProcessHandler.poll()
      # https://bugzilla.mozilla.org/show_bug.cgi?id=912285
      #      rtncode = self._process.poll()
      rtncode = self._process.proc.poll()
      if rtncode is None:
        # TODO: need ProcessHandler.terminate() and/or .send_signal()
        # https://bugzilla.mozilla.org/show_bug.cgi?id=912285
        # self._process.terminate()
        self._process.proc.terminate()
    except:
      self._process.kill()

class WebSocketServer(object):
  "Class which encapsulates the mod_pywebsocket server"

  def __init__(self, options, scriptdir, debuggerInfo=None):
    self.port = options.webSocketPort
    self._scriptdir = scriptdir
    self.debuggerInfo = debuggerInfo

  def start(self):
    # Invoke pywebsocket through a wrapper which adds special SIGINT handling.
    #
    # If we're in an interactive debugger, the wrapper causes the server to
    # ignore SIGINT so the server doesn't capture a ctrl+c meant for the
    # debugger.
    #
    # If we're not in an interactive debugger, the wrapper causes the server to
    # die silently upon receiving a SIGINT.
    scriptPath = 'pywebsocket_wrapper.py'
    script = os.path.join(self._scriptdir, scriptPath)

    cmd = [sys.executable, script]
    if self.debuggerInfo and self.debuggerInfo['interactive']:
        cmd += ['--interactive']
    cmd += ['-p', str(self.port), '-w', self._scriptdir, '-l',      \
           os.path.join(self._scriptdir, "websock.log"),            \
           '--log-level=debug', '--allow-handlers-outside-root-dir']
    # start the process
    self._process = mozprocess.ProcessHandler(cmd, cwd=SCRIPT_DIR)
    self._process.run()
    pid = self._process.pid
    log.info("runtests.py | Websocket server pid: %d", pid)

  def stop(self):
    self._process.kill()

class MochitestUtilsMixin(object):
  """
  Class containing some utility functions common to both local and remote
  mochitest runners
  """

  # TODO Utility classes are a code smell. This class is temporary
  #      and should be removed when desktop mochitests are refactored
  #      on top of mozbase. Each of the functions in here should
  #      probably live somewhere in mozbase

  oldcwd = os.getcwd()
  jarDir = 'mochijar'

  # Path to the test script on the server
  TEST_PATH = "tests"
  CHROME_PATH = "redirect.html"
  urlOpts = []

  def __init__(self):
    self.update_mozinfo()
    self.server = None
    self.wsserver = None
    self.sslTunnel = None
    self._locations = None

  def update_mozinfo(self):
    """walk up directories to find mozinfo.json update the info"""
    # TODO: This should go in a more generic place, e.g. mozinfo

    path = SCRIPT_DIR
    dirs = set()
    while path != os.path.expanduser('~'):
        if path in dirs:
            break
        dirs.add(path)
        path = os.path.split(path)[0]

    mozinfo.find_and_update_from_json(*dirs)

  def getFullPath(self, path):
    " Get an absolute path relative to self.oldcwd."
    return os.path.normpath(os.path.join(self.oldcwd, os.path.expanduser(path)))

  def getLogFilePath(self, logFile):
    """ return the log file path relative to the device we are testing on, in most cases
        it will be the full path on the local system
    """
    return self.getFullPath(logFile)

  @property
  def locations(self):
    if self._locations is not None:
      return self._locations
    locations_file = os.path.join(SCRIPT_DIR, 'server-locations.txt')
    self._locations = ServerLocations(locations_file)
    return self._locations

  def buildURLOptions(self, options, env):
    """ Add test control options from the command line to the url

        URL parameters to test URL:

        autorun -- kick off tests automatically
        closeWhenDone -- closes the browser after the tests
        hideResultsTable -- hides the table of individual test results
        logFile -- logs test run to an absolute path
        totalChunks -- how many chunks to split tests into
        thisChunk -- which chunk to run
        startAt -- name of test to start at
        endAt -- name of test to end at
        timeout -- per-test timeout in seconds
        repeat -- How many times to repeat the test, ie: repeat=1 will run the test twice.
    """

    # allow relative paths for logFile
    if options.logFile:
      options.logFile = self.getLogFilePath(options.logFile)

    # Note that all tests under options.subsuite need to be browser chrome tests.
    if options.browserChrome or options.chrome or options.subsuite or \
       options.a11y or options.webapprtChrome:
      self.makeTestConfig(options)
    else:
      if options.autorun:
        self.urlOpts.append("autorun=1")
      if options.timeout:
        self.urlOpts.append("timeout=%d" % options.timeout)
      if options.closeWhenDone:
        self.urlOpts.append("closeWhenDone=1")
      if options.logFile:
        self.urlOpts.append("logFile=" + encodeURIComponent(options.logFile))
        self.urlOpts.append("fileLevel=" + encodeURIComponent(options.fileLevel))
      if options.consoleLevel:
        self.urlOpts.append("consoleLevel=" + encodeURIComponent(options.consoleLevel))
      if options.totalChunks:
        self.urlOpts.append("totalChunks=%d" % options.totalChunks)
        self.urlOpts.append("thisChunk=%d" % options.thisChunk)
      if options.chunkByDir:
        self.urlOpts.append("chunkByDir=%d" % options.chunkByDir)
      if options.startAt:
        self.urlOpts.append("startAt=%s" % options.startAt)
      if options.endAt:
        self.urlOpts.append("endAt=%s" % options.endAt)
      if options.shuffle:
        self.urlOpts.append("shuffle=1")
      if "MOZ_HIDE_RESULTS_TABLE" in env and env["MOZ_HIDE_RESULTS_TABLE"] == "1":
        self.urlOpts.append("hideResultsTable=1")
      if options.runUntilFailure:
        self.urlOpts.append("runUntilFailure=1")
      if options.repeat:
        self.urlOpts.append("repeat=%d" % options.repeat)
      if os.path.isfile(os.path.join(self.oldcwd, os.path.dirname(__file__), self.TEST_PATH, options.testPath)) and options.repeat > 0:
        self.urlOpts.append("testname=%s" % ("/").join([self.TEST_PATH, options.testPath]))
      if options.testManifest:
        self.urlOpts.append("testManifest=%s" % options.testManifest)
        if hasattr(options, 'runOnly') and options.runOnly:
          self.urlOpts.append("runOnly=true")
        else:
          self.urlOpts.append("runOnly=false")
      if options.manifestFile:
        self.urlOpts.append("manifestFile=%s" % options.manifestFile)
      if options.failureFile:
        self.urlOpts.append("failureFile=%s" % self.getFullPath(options.failureFile))
      if options.runSlower:
        self.urlOpts.append("runSlower=true")
      if options.debugOnFailure:
        self.urlOpts.append("debugOnFailure=true")
      if options.dumpOutputDirectory:
        self.urlOpts.append("dumpOutputDirectory=%s" % encodeURIComponent(options.dumpOutputDirectory))
      if options.dumpAboutMemoryAfterTest:
        self.urlOpts.append("dumpAboutMemoryAfterTest=true")
      if options.dumpDMDAfterTest:
        self.urlOpts.append("dumpDMDAfterTest=true")
      if options.quiet:
        self.urlOpts.append("quiet=true")

  def getTestFlavor(self, options):
    if options.browserChrome:
      return "browser-chrome"
    elif options.chrome:
      return "chrome"
    elif options.a11y:
      return "a11y"
    elif options.webapprtChrome:
      return "webapprt-chrome"
    else:
      return "mochitest"

  # This check can be removed when bug 983867 is fixed.
  def isTest(self, options, filename):
    allow_js_css = False
    if options.browserChrome:
      allow_js_css = True
      testPattern = re.compile(r"browser_.+\.js")
    elif options.chrome or options.a11y:
      testPattern = re.compile(r"(browser|test)_.+\.(xul|html|js|xhtml)")
    elif options.webapprtContent:
      testPattern = re.compile(r"webapprt_")
    elif options.webapprtChrome:
      allow_js_css = True
      testPattern = re.compile(r"browser_")
    else:
      testPattern = re.compile(r"test_")

    if not allow_js_css and (".js" in filename or ".css" in filename):
      return False

    pathPieces = filename.split("/")

    return (testPattern.match(pathPieces[-1]) and
            not re.search(r'\^headers\^$', filename))

  def getTestPath(self, options):
    if options.ipcplugins:
      return "dom/plugins/test"
    else:
      return options.testPath

  def getTestRoot(self, options):
    if options.browserChrome:
      if options.immersiveMode:
        return 'metro'
      return 'browser'
    elif options.a11y:
      return 'a11y'
    elif options.webapprtChrome:
      return 'webapprtChrome'
    elif options.chrome:
      return 'chrome'
    return self.TEST_PATH

  def buildTestURL(self, options):
    testHost = "http://mochi.test:8888"
    testPath = self.getTestPath(options)
    testURL = "/".join([testHost, self.TEST_PATH, testPath])
    if os.path.isfile(os.path.join(self.oldcwd, os.path.dirname(__file__), self.TEST_PATH, testPath)) and options.repeat > 0:
      testURL = "/".join([testHost, self.TEST_PATH, os.path.dirname(testPath)])
    if options.chrome or options.a11y:
      testURL = "/".join([testHost, self.CHROME_PATH])
    elif options.browserChrome:
      testURL = "about:blank"
    return testURL

  def buildTestPath(self, options):
    """ Build the url path to the specific test harness and test file or directory
        Build a manifest of tests to run and write out a json file for the harness to read
    """
    manifest = None

    testRoot = self.getTestRoot(options)
    # testdir refers to 'mochitest' here.
    testdir = SCRIPT_DIR.split(os.getcwd())[-1]
    testdir = testdir.strip(os.sep)
    testRootAbs = os.path.abspath(os.path.join(testdir, testRoot))
    if isinstance(options.manifestFile, TestManifest):
        manifest = options.manifestFile
    elif options.manifestFile and os.path.isfile(options.manifestFile):
      manifestFileAbs = os.path.abspath(options.manifestFile)
      assert manifestFileAbs.startswith(testRootAbs)
      manifest = TestManifest([options.manifestFile], strict=False)
    else:
      masterName = self.getTestFlavor(options) + '.ini'
      masterPath = os.path.join(testdir, testRoot, masterName)

      if os.path.exists(masterPath):
        manifest = TestManifest([masterPath], strict=False)

    if manifest:
      # Python 2.6 doesn't allow unicode keys to be used for keyword
      # arguments. This gross hack works around the problem until we
      # rid ourselves of 2.6.
      info = {}
      for k, v in mozinfo.info.items():
        if isinstance(k, unicode):
          k = k.encode('ascii')
        info[k] = v

      # Bug 883858 - return all tests including disabled tests
      tests = manifest.active_tests(disabled=True, options=options, **info)
      paths = []
      testPath = self.getTestPath(options)

      for test in tests:
        pathAbs = os.path.abspath(test['path'])
        assert pathAbs.startswith(testRootAbs)
        tp = pathAbs[len(testRootAbs):].replace('\\', '/').strip('/')

        # Filter out tests if we are using --test-path
        if testPath and not tp.startswith(testPath):
          continue

        if not self.isTest(options, tp):
          print 'Warning: %s from manifest %s is not a valid test' % (test['name'], test['manifest'])
          continue

        testob = {'path': tp}
        if test.has_key('disabled'):
          testob['disabled'] = test['disabled']
        paths.append(testob)

      # Sort tests so they are run in a deterministic order.
      def path_sort(ob1, ob2):
        path1 = ob1['path'].split('/')
        path2 = ob2['path'].split('/')
        return cmp(path1, path2)

      paths.sort(path_sort)

      # Bug 883865 - add this functionality into manifestDestiny
      with open(os.path.join(testdir, 'tests.json'), 'w') as manifestFile:
        manifestFile.write(json.dumps({'tests': paths}))
      options.manifestFile = 'tests.json'

    return self.buildTestURL(options)

  def startWebSocketServer(self, options, debuggerInfo):
    """ Launch the websocket server """
    self.wsserver = WebSocketServer(options, SCRIPT_DIR, debuggerInfo)
    self.wsserver.start()

  def startWebServer(self, options):
    """Create the webserver and start it up"""

    self.server = MochitestServer(options)
    self.server.start()

    if options.pidFile != "":
      with open(options.pidFile + ".xpcshell.pid", 'w') as f:
        f.write("%s" % self.server._process.pid)

  def startServers(self, options, debuggerInfo):
    # start servers and set ports
    # TODO: pass these values, don't set on `self`
    self.webServer = options.webServer
    self.httpPort = options.httpPort
    self.sslPort = options.sslPort
    self.webSocketPort = options.webSocketPort

    # httpd-path is specified by standard makefile targets and may be specified
    # on the command line to select a particular version of httpd.js. If not
    # specified, try to select the one from hostutils.zip, as required in bug 882932.
    if not options.httpdPath:
      options.httpdPath = os.path.join(options.utilityPath, "components")

    self.startWebServer(options)
    self.startWebSocketServer(options, debuggerInfo)

    # start SSL pipe
    self.sslTunnel = SSLTunnel(options)
    self.sslTunnel.buildConfig(self.locations)
    self.sslTunnel.start()

    # If we're lucky, the server has fully started by now, and all paths are
    # ready, etc.  However, xpcshell cold start times suck, at least for debug
    # builds.  We'll try to connect to the server for awhile, and if we fail,
    # we'll try to kill the server and exit with an error.
    if self.server is not None:
      self.server.ensureReady(self.SERVER_STARTUP_TIMEOUT)

  def stopServers(self):
    """Servers are no longer needed, and perhaps more importantly, anything they
        might spew to console might confuse things."""
    if self.server is not None:
      try:
        log.info('Stopping web server')
        self.server.stop()
      except Exception:
        log.exception('Exception when stopping web server')

    if self.wsserver is not None:
      try:
        log.info('Stopping web socket server')
        self.wsserver.stop()
      except Exception:
        log.exception('Exception when stopping web socket server');

    if self.sslTunnel is not None:
      try:
        log.info('Stopping ssltunnel')
        self.sslTunnel.stop()
      except Exception:
        log.exception('Exception stopping ssltunnel');

  def copyExtraFilesToProfile(self, options):
    "Copy extra files or dirs specified on the command line to the testing profile."
    for f in options.extraProfileFiles:
      abspath = self.getFullPath(f)
      if os.path.isfile(abspath):
        shutil.copy2(abspath, options.profilePath)
      elif os.path.isdir(abspath):
        dest = os.path.join(options.profilePath, os.path.basename(abspath))
        shutil.copytree(abspath, dest)
      else:
        log.warning("runtests.py | Failed to copy %s to profile", abspath)

  def installChromeJar(self, chrome, options):
    """
      copy mochijar directory to profile as an extension so we have chrome://mochikit for all harness code
    """
    # Write chrome.manifest.
    with open(os.path.join(options.profilePath, "extensions", "staged", "mochikit@mozilla.org", "chrome.manifest"), "a") as mfile:
      mfile.write(chrome)

  def addChromeToProfile(self, options):
    "Adds MochiKit chrome tests to the profile."

    # Create (empty) chrome directory.
    chromedir = os.path.join(options.profilePath, "chrome")
    os.mkdir(chromedir)

    # Write userChrome.css.
    chrome = """
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* set default namespace to XUL */
toolbar,
toolbarpalette {
  background-color: rgb(235, 235, 235) !important;
}
toolbar#nav-bar {
  background-image: none !important;
}
"""
    with open(os.path.join(options.profilePath, "userChrome.css"), "a") as chromeFile:
      chromeFile.write(chrome)

    manifest = os.path.join(options.profilePath, "tests.manifest")
    with open(manifest, "w") as manifestFile:
      # Register chrome directory.
      chrometestDir = os.path.join(os.path.abspath("."), SCRIPT_DIR) + "/"
      if mozinfo.isWin:
        chrometestDir = "file:///" + chrometestDir.replace("\\", "/")
      manifestFile.write("content mochitests %s contentaccessible=yes\n" % chrometestDir)

      if options.testingModulesDir is not None:
        manifestFile.write("resource testing-common file:///%s\n" %
          options.testingModulesDir)

    # Call installChromeJar().
    if not os.path.isdir(os.path.join(SCRIPT_DIR, self.jarDir)):
      log.testFail("invalid setup: missing mochikit extension")
      return None

    # Support Firefox (browser), B2G (shell), SeaMonkey (navigator), and Webapp
    # Runtime (webapp).
    chrome = ""
    if options.browserChrome or options.chrome or options.a11y or options.webapprtChrome:
      chrome += """
overlay chrome://browser/content/browser.xul chrome://mochikit/content/browser-test-overlay.xul
overlay chrome://browser/content/shell.xhtml chrome://mochikit/content/browser-test-overlay.xul
overlay chrome://navigator/content/navigator.xul chrome://mochikit/content/browser-test-overlay.xul
overlay chrome://webapprt/content/webapp.xul chrome://mochikit/content/browser-test-overlay.xul
"""

    self.installChromeJar(chrome, options)
    return manifest

  def getExtensionsToInstall(self, options):
    "Return a list of extensions to install in the profile"
    extensions = options.extensionsToInstall or []
    appDir = options.app[:options.app.rfind(os.sep)] if options.app else options.utilityPath

    extensionDirs = [
      # Extensions distributed with the test harness.
      os.path.normpath(os.path.join(SCRIPT_DIR, "extensions")),
    ]
    if appDir:
      # Extensions distributed with the application.
      extensionDirs.append(os.path.join(appDir, "distribution", "extensions"))

    for extensionDir in extensionDirs:
      if os.path.isdir(extensionDir):
        for dirEntry in os.listdir(extensionDir):
          if dirEntry not in options.extensionsToExclude:
            path = os.path.join(extensionDir, dirEntry)
            if os.path.isdir(path) or (os.path.isfile(path) and path.endswith(".xpi")):
              extensions.append(path)

    # append mochikit
    extensions.append(os.path.join(SCRIPT_DIR, self.jarDir))
    return extensions

class SSLTunnel:
  def __init__(self, options):
    self.process = None
    self.utilityPath = options.utilityPath
    self.xrePath = options.xrePath
    self.certPath = options.certPath
    self.sslPort = options.sslPort
    self.httpPort = options.httpPort
    self.webServer = options.webServer
    self.webSocketPort = options.webSocketPort

    self.customCertRE = re.compile("^cert=(?P<nickname>[0-9a-zA-Z_ ]+)")
    self.clientAuthRE = re.compile("^clientauth=(?P<clientauth>[a-z]+)")
    self.redirRE      = re.compile("^redir=(?P<redirhost>[0-9a-zA-Z_ .]+)")

  def writeLocation(self, config, loc):
    for option in loc.options:
      match = self.customCertRE.match(option)
      if match:
        customcert = match.group("nickname");
        config.write("listen:%s:%s:%s:%s\n" %
                     (loc.host, loc.port, self.sslPort, customcert))

      match = self.clientAuthRE.match(option)
      if match:
        clientauth = match.group("clientauth");
        config.write("clientauth:%s:%s:%s:%s\n" %
                     (loc.host, loc.port, self.sslPort, clientauth))

      match = self.redirRE.match(option)
      if match:
        redirhost = match.group("redirhost")
        config.write("redirhost:%s:%s:%s:%s\n" %
                     (loc.host, loc.port, self.sslPort, redirhost))

  def buildConfig(self, locations):
    """Create the ssltunnel configuration file"""
    configFd, self.configFile = tempfile.mkstemp(prefix="ssltunnel", suffix=".cfg")
    with os.fdopen(configFd, "w") as config:
      config.write("httpproxy:1\n")
      config.write("certdbdir:%s\n" % self.certPath)
      config.write("forward:127.0.0.1:%s\n" % self.httpPort)
      config.write("websocketserver:%s:%s\n" % (self.webServer, self.webSocketPort))
      config.write("listen:*:%s:pgo server certificate\n" % self.sslPort)

      for loc in locations:
        if loc.scheme == "https" and "nocert" not in loc.options:
          self.writeLocation(config, loc)

  def start(self):
    """ Starts the SSL Tunnel """

    # start ssltunnel to provide https:// URLs capability
    bin_suffix = mozinfo.info.get('bin_suffix', '')
    ssltunnel = os.path.join(self.utilityPath, "ssltunnel" + bin_suffix)
    if not os.path.exists(ssltunnel):
      log.error("INFO | runtests.py | expected to find ssltunnel at %s", ssltunnel)
      exit(1)

    env = environment(xrePath=self.xrePath)
    self.process = mozprocess.ProcessHandler([ssltunnel, self.configFile],
                                               env=env)
    self.process.run()
    log.info("INFO | runtests.py | SSL tunnel pid: %d", self.process.pid)

  def stop(self):
    """ Stops the SSL Tunnel and cleans up """
    if self.process is not None:
      self.process.kill()
    if os.path.exists(self.configFile):
      os.remove(self.configFile)

class Mochitest(MochitestUtilsMixin):
  certdbNew = False
  sslTunnel = None
  vmwareHelper = None
  DEFAULT_TIMEOUT = 60.0

  # XXX use automation.py for test name to avoid breaking legacy
  # TODO: replace this with 'runtests.py' or 'mochitest' or the like
  test_name = 'automation.py'

  def __init__(self):
    super(Mochitest, self).__init__()

    # environment function for browserEnv
    self.environment = environment

    # Max time in seconds to wait for server startup before tests will fail -- if
    # this seems big, it's mostly for debug machines where cold startup
    # (particularly after a build) takes forever.
    self.SERVER_STARTUP_TIMEOUT = 180 if mozinfo.info.get('debug') else 90

    # metro browser sub process id
    self.browserProcessId = None


    self.haveDumpedScreen = False

  def extraPrefs(self, extraPrefs):
    """interpolate extra preferences from option strings"""

    try:
      return dict(parseKeyValue(extraPrefs, context='--setpref='))
    except KeyValueParseError, e:
      print str(e)
      sys.exit(1)

  def fillCertificateDB(self, options):
    # TODO: move -> mozprofile:
    # https://bugzilla.mozilla.org/show_bug.cgi?id=746243#c35

    pwfilePath = os.path.join(options.profilePath, ".crtdbpw")
    with open(pwfilePath, "w") as pwfile:
      pwfile.write("\n")

    # Pre-create the certification database for the profile
    env = self.environment(xrePath=options.xrePath)
    bin_suffix = mozinfo.info.get('bin_suffix', '')
    certutil = os.path.join(options.utilityPath, "certutil" + bin_suffix)
    pk12util = os.path.join(options.utilityPath, "pk12util" + bin_suffix)

    if self.certdbNew:
      # android and b2g use the new DB formats exclusively
      certdbPath = "sql:" + options.profilePath
    else:
      # desktop seems to use the old
      certdbPath = options.profilePath

    status = call([certutil, "-N", "-d", certdbPath, "-f", pwfilePath], env=env)
    if status:
      return status

    # Walk the cert directory and add custom CAs and client certs
    files = os.listdir(options.certPath)
    for item in files:
      root, ext = os.path.splitext(item)
      if ext == ".ca":
        trustBits = "CT,,"
        if root.endswith("-object"):
          trustBits = "CT,,CT"
        call([certutil, "-A", "-i", os.path.join(options.certPath, item),
              "-d", certdbPath, "-f", pwfilePath, "-n", root, "-t", trustBits],
              env=env)
      elif ext == ".client":
        call([pk12util, "-i", os.path.join(options.certPath, item),
              "-w", pwfilePath, "-d", certdbPath],
              env=env)

    os.unlink(pwfilePath)
    return 0

  def buildProfile(self, options):
    """ create the profile and add optional chrome bits and files if requested """
    if options.browserChrome and options.timeout:
      options.extraPrefs.append("testing.browserTestHarness.timeout=%d" % options.timeout)
    options.extraPrefs.append("browser.tabs.remote=%s" % ('true' if options.e10s else 'false'))
    options.extraPrefs.append("browser.tabs.remote.autostart=%s" % ('true' if options.e10s else 'false'))

    # get extensions to install
    extensions = self.getExtensionsToInstall(options)

    # web apps
    appsPath = os.path.join(SCRIPT_DIR, 'profile_data', 'webapps_mochitest.json')
    if os.path.exists(appsPath):
      with open(appsPath) as apps_file:
        apps = json.load(apps_file)
    else:
      apps = None

    # preferences
    prefsPath = os.path.join(SCRIPT_DIR, 'profile_data', 'prefs_general.js')
    prefs = dict(Preferences.read_prefs(prefsPath))
    prefs.update(self.extraPrefs(options.extraPrefs))

    # interpolate preferences
    interpolation = {"server": "%s:%s" % (options.webServer, options.httpPort)}
    prefs = json.loads(json.dumps(prefs) % interpolation)
    for pref in prefs:
      prefs[pref] = Preferences.cast(prefs[pref])
    # TODO: make this less hacky
    # https://bugzilla.mozilla.org/show_bug.cgi?id=913152

    # proxy
    proxy = {'remote': options.webServer,
             'http': options.httpPort,
             'https': options.sslPort,
    # use SSL port for legacy compatibility; see
    # - https://bugzilla.mozilla.org/show_bug.cgi?id=688667#c66
    # - https://bugzilla.mozilla.org/show_bug.cgi?id=899221
    # - https://github.com/mozilla/mozbase/commit/43f9510e3d58bfed32790c82a57edac5f928474d
    #             'ws': str(self.webSocketPort)
             'ws': options.sslPort
             }


    # create a profile
    self.profile = Profile(profile=options.profilePath,
                           addons=extensions,
                           locations=self.locations,
                           preferences=prefs,
                           apps=apps,
                           proxy=proxy
                           )

    # Fix options.profilePath for legacy consumers.
    options.profilePath = self.profile.profile

    manifest = self.addChromeToProfile(options)
    self.copyExtraFilesToProfile(options)

    # create certificate database for the profile
    # TODO: this should really be upstreamed somewhere, maybe mozprofile
    certificateStatus = self.fillCertificateDB(options)
    if certificateStatus:
      log.info("TEST-UNEXPECTED-FAIL | runtests.py | Certificate integration failed")
      return None

    return manifest

  def buildBrowserEnv(self, options, debugger=False):
    """build the environment variables for the specific test and operating system"""
    browserEnv = self.environment(xrePath=options.xrePath, debugger=debugger,
                                  dmdPath=options.dmdPath)

    # These variables are necessary for correct application startup; change
    # via the commandline at your own risk.
    browserEnv["XPCOM_DEBUG_BREAK"] = "stack"

    # interpolate environment passed with options
    try:
      browserEnv.update(dict(parseKeyValue(options.environment, context='--setenv')))
    except KeyValueParseError, e:
      log.error(str(e))
      return

    browserEnv["XPCOM_MEM_BLOAT_LOG"] = self.leak_report_file

    if options.fatalAssertions:
      browserEnv["XPCOM_DEBUG_BREAK"] = "stack-and-abort"

    # Produce an NSPR log, is setup (see NSPR_LOG_MODULES global at the top of
    # this script).
    self.nsprLogs = NSPR_LOG_MODULES and "MOZ_UPLOAD_DIR" in os.environ
    if self.nsprLogs:
      browserEnv["NSPR_LOG_MODULES"] = NSPR_LOG_MODULES

      browserEnv["NSPR_LOG_FILE"] = "%s/nspr.log" % tempfile.gettempdir()
      browserEnv["GECKO_SEPARATE_NSPR_LOGS"] = "1"

    if debugger and not options.slowscript:
      browserEnv["JS_DISABLE_SLOW_SCRIPT_SIGNALS"] = "1"

    return browserEnv

  def cleanup(self, manifest, options):
    """ remove temporary files and profile """
    os.remove(manifest)
    del self.profile
    if options.pidFile != "":
      try:
        os.remove(options.pidFile)
        if os.path.exists(options.pidFile + ".xpcshell.pid"):
          os.remove(options.pidFile + ".xpcshell.pid")
      except:
        log.warn("cleaning up pidfile '%s' was unsuccessful from the test harness", options.pidFile)

  def dumpScreen(self, utilityPath):
    if self.haveDumpedScreen:
      log.info("Not taking screenshot here: see the one that was previously logged")
      return
    self.haveDumpedScreen = True
    dumpScreen(utilityPath)

  def killAndGetStack(self, processPID, utilityPath, debuggerInfo, dump_screen=False):
    """
    Kill the process, preferrably in a way that gets us a stack trace.
    Also attempts to obtain a screenshot before killing the process
    if specified.
    """

    if dump_screen:
      self.dumpScreen(utilityPath)

    if mozinfo.info.get('crashreporter', True) and not debuggerInfo:
      if mozinfo.isWin:
        # We should have a "crashinject" program in our utility path
        crashinject = os.path.normpath(os.path.join(utilityPath, "crashinject.exe"))
        if os.path.exists(crashinject):
          status = subprocess.Popen([crashinject, str(processPID)]).wait()
          printstatus(status, "crashinject")
          if status == 0:
            return
      else:
        try:
          os.kill(processPID, signal.SIGABRT)
        except OSError:
          # https://bugzilla.mozilla.org/show_bug.cgi?id=921509
          log.info("Can't trigger Breakpad, process no longer exists")
        return
    log.info("Can't trigger Breakpad, just killing process")
    killPid(processPID)

  def checkForZombies(self, processLog, utilityPath, debuggerInfo):
    """Look for hung processes"""

    if not os.path.exists(processLog):
      log.info('Automation Error: PID log not found: %s', processLog)
      # Whilst no hung process was found, the run should still display as a failure
      return True

    # scan processLog for zombies
    log.info('INFO | zombiecheck | Reading PID log: %s', processLog)
    processList = []
    pidRE = re.compile(r'launched child process (\d+)$')
    with open(processLog) as processLogFD:
      for line in processLogFD:
        log.info(line.rstrip())
        m = pidRE.search(line)
        if m:
          processList.append(int(m.group(1)))

    # kill zombies
    foundZombie = False
    for processPID in processList:
      log.info("INFO | zombiecheck | Checking for orphan process with PID: %d", processPID)
      if isPidAlive(processPID):
        foundZombie = True
        log.info("TEST-UNEXPECTED-FAIL | zombiecheck | child process %d still alive after shutdown", processPID)
        self.killAndGetStack(processPID, utilityPath, debuggerInfo, dump_screen=not debuggerInfo)

    return foundZombie

  def startVMwareRecording(self, options):
    """ starts recording inside VMware VM using the recording helper dll """
    assert mozinfo.isWin
    from ctypes import cdll
    self.vmwareHelper = cdll.LoadLibrary(self.vmwareHelperPath)
    if self.vmwareHelper is None:
      log.warning("runtests.py | Failed to load "
                   "VMware recording helper")
      return
    log.info("runtests.py | Starting VMware recording.")
    try:
      self.vmwareHelper.StartRecording()
    except Exception, e:
      log.warning("runtests.py | Failed to start "
                  "VMware recording: (%s)" % str(e))
      self.vmwareHelper = None

  def stopVMwareRecording(self):
    """ stops recording inside VMware VM using the recording helper dll """
    try:
      assert mozinfo.isWin
      if self.vmwareHelper is not None:
        log.info("runtests.py | Stopping VMware recording.")
        self.vmwareHelper.StopRecording()
    except Exception, e:
      log.warning("runtests.py | Failed to stop "
                  "VMware recording: (%s)" % str(e))
      log.exception('Error stopping VMWare recording')

    self.vmwareHelper = None

  def runApp(self,
             testUrl,
             env,
             app,
             profile,
             extraArgs,
             utilityPath,
             debuggerInfo=None,
             symbolsPath=None,
             timeout=-1,
             onLaunch=None,
             webapprtChrome=False,
             hide_subtests=False,
             screenshotOnFail=False):
    """
    Run the app, log the duration it took to execute, return the status code.
    Kills the app if it runs for longer than |maxTime| seconds, or outputs nothing for |timeout| seconds.
    """

    # debugger information
    interactive = False
    debug_args = None
    if debuggerInfo:
        interactive = debuggerInfo['interactive']
        debug_args = [debuggerInfo['path']] + debuggerInfo['args']

    # fix default timeout
    if timeout == -1:
      timeout = self.DEFAULT_TIMEOUT

    # build parameters
    is_test_build = mozinfo.info.get('tests_enabled', True)
    bin_suffix = mozinfo.info.get('bin_suffix', '')

    # copy env so we don't munge the caller's environment
    env = env.copy()

    # make sure we clean up after ourselves.
    try:
      # set process log environment variable
      tmpfd, processLog = tempfile.mkstemp(suffix='pidlog')
      os.close(tmpfd)
      env["MOZ_PROCESS_LOG"] = processLog

      if interactive:
        # If an interactive debugger is attached,
        # don't use timeouts, and don't capture ctrl-c.
        timeout = None
        signal.signal(signal.SIGINT, lambda sigid, frame: None)

      # build command line
      cmd = os.path.abspath(app)
      args = list(extraArgs)
      # TODO: mozrunner should use -foreground at least for mac
      # https://bugzilla.mozilla.org/show_bug.cgi?id=916512
      args.append('-foreground')
      if testUrl:
        if debuggerInfo and debuggerInfo['requiresEscapedArgs']:
          testUrl = testUrl.replace("&", "\\&")
        args.append(testUrl)

      if mozinfo.info["debug"] and not webapprtChrome:
        shutdownLeaks = ShutdownLeaks(log.info)
      else:
        shutdownLeaks = None

      # create an instance to process the output
      outputHandler = self.OutputHandler(harness=self,
                                         utilityPath=utilityPath,
                                         symbolsPath=symbolsPath,
                                         dump_screen_on_timeout=not debuggerInfo,
                                         dump_screen_on_fail=screenshotOnFail,
                                         hide_subtests=hide_subtests,
                                         shutdownLeaks=shutdownLeaks,
        )

      def timeoutHandler():
        outputHandler.log_output_buffer()
        browserProcessId = outputHandler.browserProcessId
        self.handleTimeout(timeout, proc, utilityPath, debuggerInfo, browserProcessId)
      kp_kwargs = {'kill_on_timeout': False,
                   'cwd': SCRIPT_DIR,
                   'onTimeout': [timeoutHandler]}
      kp_kwargs['processOutputLine'] = [outputHandler]

      # create mozrunner instance and start the system under test process
      self.lastTestSeen = self.test_name
      startTime = datetime.now()

      # b2g desktop requires FirefoxRunner even though appname is b2g
      if mozinfo.info.get('appname') == 'b2g' and mozinfo.info.get('toolkit') != 'gonk':
          runner_cls = mozrunner.FirefoxRunner
      else:
          runner_cls = mozrunner.runners.get(mozinfo.info.get('appname', 'firefox'),
                                             mozrunner.Runner)
      runner = runner_cls(profile=self.profile,
                          binary=cmd,
                          cmdargs=args,
                          env=env,
                          process_class=mozprocess.ProcessHandlerMixin,
                          kp_kwargs=kp_kwargs,
                          )

      # XXX work around bug 898379 until mozrunner is updated for m-c; see
      # https://bugzilla.mozilla.org/show_bug.cgi?id=746243#c49
      runner.kp_kwargs = kp_kwargs

      # start the runner
      runner.start(debug_args=debug_args,
                   interactive=interactive,
                   outputTimeout=timeout)
      proc = runner.process_handler
      log.info("INFO | runtests.py | Application pid: %d", proc.pid)

      if onLaunch is not None:
        # Allow callers to specify an onLaunch callback to be fired after the
        # app is launched.
        # We call onLaunch for b2g desktop mochitests so that we can
        # run a Marionette script after gecko has completed startup.
        onLaunch()

      # wait until app is finished
      # XXX copy functionality from
      # https://github.com/mozilla/mozbase/blob/master/mozrunner/mozrunner/runner.py#L61
      # until bug 913970 is fixed regarding mozrunner `wait` not returning status
      # see https://bugzilla.mozilla.org/show_bug.cgi?id=913970
      status = proc.wait()
      printstatus(status, "Main app process")
      runner.process_handler = None

      if timeout is None:
        didTimeout = False
      else:
        didTimeout = proc.didTimeout

      # finalize output handler
      outputHandler.finish(didTimeout)

      # record post-test information
      if status:
        log.info("TEST-UNEXPECTED-FAIL | %s | application terminated with exit code %s", self.lastTestSeen, status)
      else:
        self.lastTestSeen = 'Main app process exited normally'

      log.info("INFO | runtests.py | Application ran for: %s", str(datetime.now() - startTime))

      # Do a final check for zombie child processes.
      zombieProcesses = self.checkForZombies(processLog, utilityPath, debuggerInfo)

      # check for crashes
      minidump_path = os.path.join(self.profile.profile, "minidumps")
      crashed = mozcrash.check_for_crashes(minidump_path,
                                           symbolsPath,
                                           test_name=self.lastTestSeen)

      if crashed or zombieProcesses:
        status = 1

    finally:
      # cleanup
      if os.path.exists(processLog):
        os.remove(processLog)

    return status

  def runTests(self, options, onLaunch=None):
    """ Prepare, configure, run tests and cleanup """

    # get debugger info, a dict of:
    # {'path': path to the debugger (string),
    #  'interactive': whether the debugger is interactive or not (bool)
    #  'args': arguments to the debugger (list)
    # TODO: use mozrunner.local.debugger_arguments:
    # https://github.com/mozilla/mozbase/blob/master/mozrunner/mozrunner/local.py#L42
    debuggerInfo = getDebuggerInfo(self.oldcwd,
                                   options.debugger,
                                   options.debuggerArgs,
                                   options.debuggerInteractive)

    self.leak_report_file = os.path.join(options.profilePath, "runtests_leaks.log")

    browserEnv = self.buildBrowserEnv(options, debuggerInfo is not None)
    if browserEnv is None:
      return 1

    # buildProfile sets self.profile .
    # This relies on sideeffects and isn't very stateful:
    # https://bugzilla.mozilla.org/show_bug.cgi?id=919300
    manifest = self.buildProfile(options)
    if manifest is None:
      return 1

    try:
      self.startServers(options, debuggerInfo)

      testURL = self.buildTestPath(options)
      self.buildURLOptions(options, browserEnv)
      if self.urlOpts:
        testURL += "?" + "&".join(self.urlOpts)

      if options.webapprtContent:
        options.browserArgs.extend(('-test-mode', testURL))
        testURL = None

      if options.immersiveMode:
        options.browserArgs.extend(('-firefoxpath', options.app))
        options.app = self.immersiveHelperPath

      if options.jsdebugger:
        options.browserArgs.extend(['-jsdebugger'])

      # Remove the leak detection file so it can't "leak" to the tests run.
      # The file is not there if leak logging was not enabled in the application build.
      if os.path.exists(self.leak_report_file):
        os.remove(self.leak_report_file)

      # then again to actually run mochitest
      if options.timeout:
        timeout = options.timeout + 30
      elif options.debugger or not options.autorun:
        timeout = None
      else:
        timeout = 330.0 # default JS harness timeout is 300 seconds

      if options.vmwareRecording:
        self.startVMwareRecording(options);

      log.info("runtests.py | Running tests: start.\n")
      try:
        status = self.runApp(testURL,
                             browserEnv,
                             options.app,
                             profile=self.profile,
                             extraArgs=options.browserArgs,
                             utilityPath=options.utilityPath,
                             debuggerInfo=debuggerInfo,
                             symbolsPath=options.symbolsPath,
                             timeout=timeout,
                             onLaunch=onLaunch,
                             webapprtChrome=options.webapprtChrome,
                             hide_subtests=options.hide_subtests,
                             screenshotOnFail=options.screenshotOnFail
        )
      except KeyboardInterrupt:
        log.info("runtests.py | Received keyboard interrupt.\n");
        status = -1
      except:
        traceback.print_exc()
        log.error("Automation Error: Received unexpected exception while running application\n")
        status = 1

    finally:
      if options.vmwareRecording:
        self.stopVMwareRecording();
      self.stopServers()

    processLeakLog(self.leak_report_file, options.leakThreshold)

    if self.nsprLogs:
      with zipfile.ZipFile("%s/nsprlog.zip" % browserEnv["MOZ_UPLOAD_DIR"], "w", zipfile.ZIP_DEFLATED) as logzip:
        for logfile in glob.glob("%s/nspr*.log*" % tempfile.gettempdir()):
          logzip.write(logfile)
          os.remove(logfile)

    log.info("runtests.py | Running tests: end.")

    if manifest is not None:
      self.cleanup(manifest, options)

    return status

  def handleTimeout(self, timeout, proc, utilityPath, debuggerInfo, browserProcessId):
    """handle process output timeout"""
    # TODO: bug 913975 : _processOutput should call self.processOutputLine one more time one timeout (I think)
    log.info("TEST-UNEXPECTED-FAIL | %s | application timed out after %d seconds with no output", self.lastTestSeen, int(timeout))
    browserProcessId = browserProcessId or proc.pid
    self.killAndGetStack(browserProcessId, utilityPath, debuggerInfo, dump_screen=not debuggerInfo)

  ### output processing

  class OutputHandler(object):
    """line output handler for mozrunner"""
    def __init__(self, harness, utilityPath, symbolsPath=None, dump_screen_on_timeout=True, dump_screen_on_fail=False,
                 hide_subtests=False, shutdownLeaks=None):
      """
      harness -- harness instance
      dump_screen_on_timeout -- whether to dump the screen on timeout
      """
      self.harness = harness
      self.output_buffer = []
      self.running_test = False
      self.utilityPath = utilityPath
      self.symbolsPath = symbolsPath
      self.dump_screen_on_timeout = dump_screen_on_timeout
      self.dump_screen_on_fail = dump_screen_on_fail
      self.hide_subtests = hide_subtests
      self.shutdownLeaks = shutdownLeaks

      # perl binary to use
      self.perl = which('perl')

      # With metro browser runs this script launches the metro test harness which launches the browser.
      # The metro test harness hands back the real browser process id via log output which we need to
      # pick up on and parse out. This variable tracks the real browser process id if we find it.
      self.browserProcessId = None

      # stack fixer function and/or process
      self.stackFixerFunction, self.stackFixerProcess = self.stackFixer()

    def processOutputLine(self, line):
      """per line handler of output for mozprocess"""
      for handler in self.outputHandlers():
        line = handler(line)
    __call__ = processOutputLine

    def outputHandlers(self):
      """returns ordered list of output handlers"""
      return [self.fix_stack,
              self.format,
              self.dumpScreenOnTimeout,
              self.dumpScreenOnFail,
              self.metro_subprocess_id,
              self.trackShutdownLeaks,
              self.check_test_failure,
              self.log,
              self.record_last_test,
              ]

    def stackFixer(self):
      """
      return 2-tuple, (stackFixerFunction, StackFixerProcess),
      if any, to use on the output lines
      """

      if not mozinfo.info.get('debug'):
        return None, None

      stackFixerFunction = stackFixerProcess = None

      def import_stackFixerModule(module_name):
        sys.path.insert(0, self.utilityPath)
        module = __import__(module_name, globals(), locals(), [])
        sys.path.pop(0)
        return module

      if self.symbolsPath and os.path.exists(self.symbolsPath):
        # Run each line through a function in fix_stack_using_bpsyms.py (uses breakpad symbol files)
        # This method is preferred for Tinderbox builds, since native symbols may have been stripped.
        stackFixerModule = import_stackFixerModule('fix_stack_using_bpsyms')
        stackFixerFunction = lambda line: stackFixerModule.fixSymbols(line, self.symbolsPath)

      elif mozinfo.isLinux and self.perl:
        # Run logsource through fix-linux-stack.pl (uses addr2line)
        # This method is preferred for developer machines, so we don't have to run "make buildsymbols".
        stackFixerCommand = [self.perl, os.path.join(self.utilityPath, "fix-linux-stack.pl")]
        stackFixerProcess = subprocess.Popen(stackFixerCommand, stdin=subprocess.PIPE,
                                             stdout=subprocess.PIPE)
        def fixFunc(line):
          stackFixerProcess.stdin.write(line + '\n')
          return stackFixerProcess.stdout.readline().rstrip()

        stackFixerFunction = fixFunc

      return (stackFixerFunction, stackFixerProcess)

    def finish(self, didTimeout):
      if self.stackFixerProcess:
        self.stackFixerProcess.communicate()
        status = self.stackFixerProcess.returncode
        if status and not didTimeout:
          log.info("TEST-UNEXPECTED-FAIL | runtests.py | Stack fixer process exited with code %d during test run", status)

      if self.shutdownLeaks:
        self.shutdownLeaks.process()

    def log_output_buffer(self):
        if self.output_buffer:
            lines = ['  %s' % line for line in self.output_buffer]
            log.info("Buffered test output:\n%s" % '\n'.join(lines))

    # output line handlers:
    # these take a line and return a line

    def fix_stack(self, line):
      if self.stackFixerFunction:
        return self.stackFixerFunction(line)
      return line

    def format(self, line):
      """format the line"""
      return line.rstrip().decode("UTF-8", "ignore")

    def dumpScreenOnTimeout(self, line):
      if not self.dump_screen_on_fail and self.dump_screen_on_timeout and "TEST-UNEXPECTED-FAIL" in line and "Test timed out" in line:
        self.log_output_buffer()
        self.harness.dumpScreen(self.utilityPath)
      return line

    def dumpScreenOnFail(self, line):
      if self.dump_screen_on_fail and "TEST-UNEXPECTED-FAIL" in line:
        self.log_output_buffer()
        self.harness.dumpScreen(self.utilityPath)
      return line

    def metro_subprocess_id(self, line):
      """look for metro browser subprocess id"""
      if "METRO_BROWSER_PROCESS" in line:
        index = line.find("=")
        if index != -1:
          self.browserProcessId = line[index+1:].rstrip()
          log.info("INFO | runtests.py | metro browser sub process id detected: %s", self.browserProcessId)
      return line

    def trackShutdownLeaks(self, line):
      if self.shutdownLeaks:
        self.shutdownLeaks.log(line)
      return line

    def check_test_failure(self, line):
      if 'TEST-END' in line:
        self.running_test = False
        if any('TEST-UNEXPECTED' in l for l in self.output_buffer):
          self.log_output_buffer()
      return line

    def log(self, line):
      if self.hide_subtests and self.running_test:
        self.output_buffer.append(line)
      else:
        # hack to make separators align nicely, remove when we use mozlog
        if self.hide_subtests and 'TEST-END' in line:
            index = line.index('TEST-END') + len('TEST-END')
            line = line[:index] + ' ' * (len('TEST-START')-len('TEST-END')) + line[index:]
        log.info(line)
      return line

    def record_last_test(self, line):
      """record last test on harness"""
      if "TEST-START" in line and "|" in line:
        if not line.endswith('Shutdown'):
          self.output_buffer = []
          self.running_test = True
        self.harness.lastTestSeen = line.split("|")[1].strip()
      return line


  def makeTestConfig(self, options):
    "Creates a test configuration file for customizing test execution."
    options.logFile = options.logFile.replace("\\", "\\\\")
    options.testPath = options.testPath.replace("\\", "\\\\")
    testRoot = self.getTestRoot(options)

    if "MOZ_HIDE_RESULTS_TABLE" in os.environ and os.environ["MOZ_HIDE_RESULTS_TABLE"] == "1":
      options.hideResultsTable = True

    d = dict(options.__dict__)
    d['testRoot'] = testRoot
    content = json.dumps(d)

    with open(os.path.join(options.profilePath, "testConfig.js"), "w") as config:
      config.write(content)

  def installExtensionFromPath(self, options, path, extensionID = None):
    """install an extension to options.profilePath"""

    # TODO: currently extensionID is unused; see
    # https://bugzilla.mozilla.org/show_bug.cgi?id=914267
    # [mozprofile] make extensionID a parameter to install_from_path
    # https://github.com/mozilla/mozbase/blob/master/mozprofile/mozprofile/addons.py#L169

    extensionPath = self.getFullPath(path)

    log.info("runtests.py | Installing extension at %s to %s." %
                (extensionPath, options.profilePath))

    addons = AddonManager(options.profilePath)

    # XXX: del the __del__
    # hack can be removed when mozprofile is mirrored to m-c ; see
    # https://bugzilla.mozilla.org/show_bug.cgi?id=911218 :
    # [mozprofile] AddonManager should only cleanup on __del__ optionally:
    # https://github.com/mozilla/mozbase/blob/master/mozprofile/mozprofile/addons.py#L266
    if hasattr(addons, '__del__'):
      del addons.__del__

    addons.install_from_path(path)

  def installExtensionsToProfile(self, options):
    "Install special testing extensions, application distributed extensions, and specified on the command line ones to testing profile."
    for path in self.getExtensionsToInstall(options):
      self.installExtensionFromPath(options, path)


def main():

  # parse command line options
  mochitest = Mochitest()
  parser = MochitestOptions()
  options, args = parser.parse_args()
  options = parser.verifyOptions(options, mochitest)
  if options is None:
    # parsing error
    sys.exit(1)

  options.utilityPath = mochitest.getFullPath(options.utilityPath)
  options.certPath = mochitest.getFullPath(options.certPath)
  if options.symbolsPath and not isURL(options.symbolsPath):
    options.symbolsPath = mochitest.getFullPath(options.symbolsPath)

  sys.exit(mochitest.runTests(options))

if __name__ == "__main__":
  main()