summaryrefslogtreecommitdiffstats
path: root/build/automation.py.in
blob: 83e71803764eb1419480405d1b34269a26787792 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
#
# 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/.

from __future__ import with_statement
import logging
import os
import re
import select
import signal
import subprocess
import sys
import tempfile
from datetime import datetime, timedelta

SCRIPT_DIR = os.path.abspath(os.path.realpath(os.path.dirname(sys.argv[0])))
sys.path.insert(0, SCRIPT_DIR)

# --------------------------------------------------------------
# TODO: this is a hack for mozbase without virtualenv, remove with bug 849900
# These paths refer to relative locations to test.zip, not the OBJDIR or SRCDIR
here = os.path.dirname(os.path.realpath(__file__))
mozbase = os.path.realpath(os.path.join(os.path.dirname(here), 'mozbase'))

if os.path.isdir(mozbase):
    for package in os.listdir(mozbase):
        package_path = os.path.join(mozbase, package)
        if package_path not in sys.path:
            sys.path.append(package_path)

import mozcrash
from mozscreenshot import printstatus, dump_screen


# ---------------------------------------------------------------

_DEFAULT_PREFERENCE_FILE = os.path.join(SCRIPT_DIR, 'prefs_general.js')
_DEFAULT_APPS_FILE = os.path.join(SCRIPT_DIR, 'webapps_mochitest.json')

_DEFAULT_WEB_SERVER = "127.0.0.1"
_DEFAULT_HTTP_PORT = 8888
_DEFAULT_SSL_PORT = 4443
_DEFAULT_WEBSOCKET_PORT = 9988

# from nsIPrincipal.idl
_APP_STATUS_NOT_INSTALLED = 0
_APP_STATUS_INSTALLED     = 1
_APP_STATUS_PRIVILEGED    = 2
_APP_STATUS_CERTIFIED     = 3

#expand _DIST_BIN = __XPC_BIN_PATH__
#expand _IS_WIN32 = len("__WIN32__") != 0
#expand _IS_MAC = __IS_MAC__ != 0
#expand _IS_LINUX = __IS_LINUX__ != 0
#ifdef IS_CYGWIN
#expand _IS_CYGWIN = __IS_CYGWIN__ == 1
#else
_IS_CYGWIN = False
#endif
#expand _BIN_SUFFIX = __BIN_SUFFIX__

#expand _DEFAULT_APP = "./" + __BROWSER_PATH__
#expand _CERTS_SRC_DIR = __CERTS_SRC_DIR__
#expand _IS_TEST_BUILD = __IS_TEST_BUILD__
#expand _IS_DEBUG_BUILD = __IS_DEBUG_BUILD__
#expand _CRASHREPORTER = __CRASHREPORTER__ == 1
#expand _IS_ASAN = __IS_ASAN__ == 1


if _IS_WIN32:
  import ctypes, ctypes.wintypes, time, msvcrt
else:
  import errno

def resetGlobalLog(log):
  while _log.handlers:
    _log.removeHandler(_log.handlers[0])
  handler = logging.StreamHandler(log)
  _log.setLevel(logging.INFO)
  _log.addHandler(handler)

# We use the logging system here primarily because it'll handle multiple
# threads, which is needed to process the output of the server and application
# processes simultaneously.
_log = logging.getLogger()
resetGlobalLog(sys.stdout)


#################
# PROFILE SETUP #
#################

class Automation(object):
  """
  Runs the browser from a script, and provides useful utilities
  for setting up the browser environment.
  """

  DIST_BIN = _DIST_BIN
  IS_WIN32 = _IS_WIN32
  IS_MAC = _IS_MAC
  IS_LINUX = _IS_LINUX
  IS_CYGWIN = _IS_CYGWIN
  BIN_SUFFIX = _BIN_SUFFIX

  UNIXISH = not IS_WIN32 and not IS_MAC

  DEFAULT_APP = _DEFAULT_APP
  CERTS_SRC_DIR = _CERTS_SRC_DIR
  IS_TEST_BUILD = _IS_TEST_BUILD
  IS_DEBUG_BUILD = _IS_DEBUG_BUILD
  CRASHREPORTER = _CRASHREPORTER
  IS_ASAN = _IS_ASAN

  # timeout, in seconds
  DEFAULT_TIMEOUT = 60.0
  DEFAULT_WEB_SERVER = _DEFAULT_WEB_SERVER
  DEFAULT_HTTP_PORT = _DEFAULT_HTTP_PORT
  DEFAULT_SSL_PORT = _DEFAULT_SSL_PORT
  DEFAULT_WEBSOCKET_PORT = _DEFAULT_WEBSOCKET_PORT

  def __init__(self):
    self.log = _log
    self.lastTestSeen = "automation.py"
    self.haveDumpedScreen = False

  def setServerInfo(self, 
                    webServer = _DEFAULT_WEB_SERVER, 
                    httpPort = _DEFAULT_HTTP_PORT, 
                    sslPort = _DEFAULT_SSL_PORT,
                    webSocketPort = _DEFAULT_WEBSOCKET_PORT):
    self.webServer = webServer
    self.httpPort = httpPort
    self.sslPort = sslPort
    self.webSocketPort = webSocketPort

  @property
  def __all__(self):
    return [
           "UNIXISH",
           "IS_WIN32",
           "IS_MAC",
           "log",
           "runApp",
           "Process",
           "DIST_BIN",
           "DEFAULT_APP",
           "CERTS_SRC_DIR",
           "environment",
           "IS_TEST_BUILD",
           "IS_DEBUG_BUILD",
           "DEFAULT_TIMEOUT",
          ]

  class Process(subprocess.Popen):
    """
    Represents our view of a subprocess.
    It adds a kill() method which allows it to be stopped explicitly.
    """

    def __init__(self,
                 args,
                 bufsize=0,
                 executable=None,
                 stdin=None,
                 stdout=None,
                 stderr=None,
                 preexec_fn=None,
                 close_fds=False,
                 shell=False,
                 cwd=None,
                 env=None,
                 universal_newlines=False,
                 startupinfo=None,
                 creationflags=0):
      _log.info("INFO | automation.py | Launching: %s", subprocess.list2cmdline(args))
      subprocess.Popen.__init__(self, args, bufsize, executable,
                                stdin, stdout, stderr,
                                preexec_fn, close_fds,
                                shell, cwd, env,
                                universal_newlines, startupinfo, creationflags)
      self.log = _log

    def kill(self):
      if Automation().IS_WIN32:
        import platform
        pid = "%i" % self.pid
        if platform.release() == "2000":
          # Windows 2000 needs 'kill.exe' from the 
          #'Windows 2000 Resource Kit tools'. (See bug 475455.)
          try:
            subprocess.Popen(["kill", "-f", pid]).wait()
          except:
            self.log.info("TEST-UNEXPECTED-FAIL | automation.py | Missing 'kill' utility to kill process with pid=%s. Kill it manually!", pid)
        else:
          # Windows XP and later.
          subprocess.Popen(["taskkill", "/F", "/PID", pid]).wait()
      else:
        os.kill(self.pid, signal.SIGKILL)

  def environment(self, env=None, xrePath=None, crashreporter=True, debugger=False, dmdPath=None, lsanPath=None):
    if xrePath == None:
      xrePath = self.DIST_BIN
    if env == None:
      env = dict(os.environ)

    ldLibraryPath = os.path.abspath(os.path.join(SCRIPT_DIR, xrePath))
    dmdLibrary = None
    preloadEnvVar = None
    if self.UNIXISH or self.IS_MAC:
      envVar = "LD_LIBRARY_PATH"
      preloadEnvVar = "LD_PRELOAD"
      if self.IS_MAC:
        envVar = "DYLD_LIBRARY_PATH"
        dmdLibrary = "libdmd.dylib"
      else: # unixish
        env['MOZILLA_FIVE_HOME'] = xrePath
        dmdLibrary = "libdmd.so"
      if envVar in env:
        ldLibraryPath = ldLibraryPath + ":" + env[envVar]
      env[envVar] = ldLibraryPath
    elif self.IS_WIN32:
      env["PATH"] = env["PATH"] + ";" + str(ldLibraryPath)
      dmdLibrary = "dmd.dll"
      preloadEnvVar = "MOZ_REPLACE_MALLOC_LIB"

    if dmdPath and dmdLibrary and preloadEnvVar:
      env[preloadEnvVar] = os.path.join(dmdPath, dmdLibrary)

    if crashreporter and not debugger:
      env['MOZ_CRASHREPORTER_NO_REPORT'] = '1'
    else:
      env['MOZ_CRASHREPORTER_DISABLE'] = '1'

    # Crash on non-local network connections by default.
    # MOZ_DISABLE_NONLOCAL_CONNECTIONS can be set to "0" to temporarily
    # enable non-local connections for the purposes of local testing.  Don't
    # override the user's choice here.  See bug 1049688.
    env.setdefault('MOZ_DISABLE_NONLOCAL_CONNECTIONS', '1')

    env['GNOME_DISABLE_CRASH_DIALOG'] = '1'
    env['XRE_NO_WINDOWS_CRASH_DIALOG'] = '1'

    # Set WebRTC logging in case it is not set yet
    env.setdefault('MOZ_LOG', 'signaling:3,mtransport:4,DataChannel:4,jsep:4,MediaPipelineFactory:4')
    env.setdefault('R_LOG_LEVEL', '6')
    env.setdefault('R_LOG_DESTINATION', 'stderr')
    env.setdefault('R_LOG_VERBOSE', '1')

    # ASan specific environment stuff
    if self.IS_ASAN and (self.IS_LINUX or self.IS_MAC):
      # Symbolizer support
      llvmsym = os.path.join(xrePath, "llvm-symbolizer")
      if os.path.isfile(llvmsym):
        env["ASAN_SYMBOLIZER_PATH"] = llvmsym
        self.log.info("INFO | automation.py | ASan using symbolizer at %s", llvmsym)
      else:
        self.log.info("TEST-UNEXPECTED-FAIL | automation.py | Failed to find ASan symbolizer at %s", llvmsym)

      try:
        totalMemory = int(os.popen("free").readlines()[1].split()[1])

        # Only 4 GB RAM or less available? Use custom ASan options to reduce
        # the amount of resources required to do the tests. Standard options 
        # will otherwise lead to OOM conditions on the current test slaves.
        if totalMemory <= 1024 * 1024 * 4:
          self.log.info("INFO | automation.py | ASan running in low-memory configuration")
          env["ASAN_OPTIONS"] = "quarantine_size=50331648:malloc_context_size=5"
        else:
          self.log.info("INFO | automation.py | ASan running in default memory configuration")
      except OSError,err:
        self.log.info("Failed determine available memory, disabling ASan low-memory configuration: %s", err.strerror)
      except:
        self.log.info("Failed determine available memory, disabling ASan low-memory configuration")

    return env

  def killPid(self, pid):
    try:
      os.kill(pid, getattr(signal, "SIGKILL", signal.SIGTERM))
    except WindowsError:
      self.log.info("Failed to kill process %d." % pid)

  if IS_WIN32:
    PeekNamedPipe = ctypes.windll.kernel32.PeekNamedPipe
    GetLastError = ctypes.windll.kernel32.GetLastError

    def readWithTimeout(self, f, timeout):
      """
      Try to read a line of output from the file object |f|. |f| must be a
      pipe, like the |stdout| member of a subprocess.Popen object created
      with stdout=PIPE. Returns a tuple (line, did_timeout), where |did_timeout|
      is True if the read timed out, and False otherwise. If no output is
      received within |timeout| seconds, returns a blank line.
      """

      if timeout is None:
        timeout = 0

      x = msvcrt.get_osfhandle(f.fileno())
      l = ctypes.c_long()
      done = time.time() + timeout

      buffer = ""
      while timeout == 0 or time.time() < done:
        if self.PeekNamedPipe(x, None, 0, None, ctypes.byref(l), None) == 0:
          err = self.GetLastError()
          if err == 38 or err == 109: # ERROR_HANDLE_EOF || ERROR_BROKEN_PIPE
            return ('', False)
          else:
            self.log.error("readWithTimeout got error: %d", err)
        # read a character at a time, checking for eol. Return once we get there.
        index = 0
        while index < l.value:
          char = f.read(1)
          buffer += char
          if char == '\n':
            return (buffer, False)
          index = index + 1
        time.sleep(0.01)
      return (buffer, True)

    def isPidAlive(self, 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:

    def readWithTimeout(self, f, timeout):
      """Try to read a line of output from the file object |f|. If no output
      is received within |timeout| seconds, return a blank line.
      Returns a tuple (line, did_timeout), where |did_timeout| is True
      if the read timed out, and False otherwise."""
      (r, w, e) = select.select([f], [], [], timeout)
      if len(r) == 0:
        return ('', True)
      return (f.readline(), False)

    def isPidAlive(self, 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

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

    self.haveDumpedScreen = True;
    dump_screen(utilityPath, self.log)


  def killAndGetStack(self, processPID, utilityPath, debuggerInfo):
    """Kill the process, preferrably in a way that gets us a stack trace.
       Also attempts to obtain a screenshot before killing the process."""
    if not debuggerInfo:
      self.dumpScreen(utilityPath)
    self.killAndGetStackNoScreenshot(processPID, utilityPath, debuggerInfo)

  def killAndGetStackNoScreenshot(self, processPID, utilityPath, debuggerInfo):
    """Kill the process, preferrably in a way that gets us a stack trace."""
    if self.CRASHREPORTER and not debuggerInfo:
      if not self.IS_WIN32:
        # ABRT will get picked up by Breakpad's signal handler
        os.kill(processPID, signal.SIGABRT)
        return
      else:
        # 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("crashinject", status)
          if status == 0:
            return
    self.log.info("Can't trigger Breakpad, just killing process")
    self.killPid(processPID)

  def waitForFinish(self, proc, utilityPath, timeout, maxTime, startTime, debuggerInfo, symbolsPath, outputHandler=None):
    """ Look for timeout or crashes and return the status after the process terminates """
    stackFixerFunction = None
    didTimeout = False
    hitMaxTime = False
    if proc.stdout is None:
      self.log.info("TEST-INFO: Not logging stdout or stderr due to debugger connection")
    else:
      logsource = proc.stdout

      if self.IS_DEBUG_BUILD and symbolsPath and os.path.exists(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.
        sys.path.insert(0, utilityPath)
        import fix_stack_using_bpsyms as stackFixerModule
        stackFixerFunction = lambda line: stackFixerModule.fixSymbols(line, symbolsPath)
        del sys.path[0]
      elif self.IS_DEBUG_BUILD and self.IS_MAC:
        # Run each line through a function in fix_macosx_stack.py (uses atos)
        sys.path.insert(0, utilityPath)
        import fix_macosx_stack as stackFixerModule
        stackFixerFunction = lambda line: stackFixerModule.fixSymbols(line)
        del sys.path[0]
      elif self.IS_DEBUG_BUILD and self.IS_LINUX:
        # Run each line through a function in fix_linux_stack.py (uses addr2line)
        # This method is preferred for developer machines, so we don't have to run "make buildsymbols".
        sys.path.insert(0, utilityPath)
        import fix_linux_stack as stackFixerModule
        stackFixerFunction = lambda line: stackFixerModule.fixSymbols(line)
        del sys.path[0]

      # 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.
      browserProcessId = -1

      (line, didTimeout) = self.readWithTimeout(logsource, timeout)
      while line != "" and not didTimeout:
        if stackFixerFunction:
          line = stackFixerFunction(line)

        if outputHandler is None:
            self.log.info(line.rstrip().decode("UTF-8", "ignore"))
        else:
            outputHandler(line)

        if "TEST-START" in line and "|" in line:
          self.lastTestSeen = line.split("|")[1].strip()
        if not debuggerInfo and "TEST-UNEXPECTED-FAIL" in line and "Test timed out" in line:
          self.dumpScreen(utilityPath)

        (line, didTimeout) = self.readWithTimeout(logsource, timeout)

        if not hitMaxTime and maxTime and datetime.now() - startTime > timedelta(seconds = maxTime):
          # Kill the application.
          hitMaxTime = True
          self.log.info("TEST-UNEXPECTED-FAIL | %s | application ran for longer than allowed maximum time of %d seconds", self.lastTestSeen, int(maxTime))
          self.log.error("Force-terminating active process(es).");
          self.killAndGetStack(proc.pid, utilityPath, debuggerInfo)
      if didTimeout:
        if line:
          self.log.info(line.rstrip().decode("UTF-8", "ignore"))
        self.log.info("TEST-UNEXPECTED-FAIL | %s | application timed out after %d seconds with no output", self.lastTestSeen, int(timeout))
        self.log.error("Force-terminating active process(es).");
        if browserProcessId == -1:
          browserProcessId = proc.pid
        self.killAndGetStack(browserProcessId, utilityPath, debuggerInfo)

    status = proc.wait()
    printstatus("Main app process", status)
    if status == 0:
      self.lastTestSeen = "Main app process exited normally"
    if status != 0 and not didTimeout and not hitMaxTime:
      self.log.info("TEST-UNEXPECTED-FAIL | %s | Exited with code %d during test run", self.lastTestSeen, status)
    return status

  def buildCommandLine(self, app, debuggerInfo, profileDir, testURL, extraArgs):
    """ build the application command line """

    cmd = os.path.abspath(app)
    if self.IS_MAC and os.path.exists(cmd + "-bin"):
      # Prefer 'app-bin' in case 'app' is a shell script.
      # We can remove this hack once bug 673899 etc are fixed.
      cmd += "-bin"

    args = []

    if debuggerInfo:
      args.extend(debuggerInfo.args)
      args.append(cmd)
      cmd = os.path.abspath(debuggerInfo.path)

    if self.IS_MAC:
      args.append("-foreground")

    if self.IS_CYGWIN:
      profileDirectory = commands.getoutput("cygpath -w \"" + profileDir + "/\"")
    else:
      profileDirectory = profileDir + "/"

    args.extend(("-no-remote", "-profile", profileDirectory))
    if testURL is not None:
      args.append((testURL))
    args.extend(extraArgs)
    return cmd, args

  def checkForZombies(self, processLog, utilityPath, debuggerInfo):
    """ Look for hung processes """
    if not os.path.exists(processLog):
      self.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

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

    for processPID in processList:
      self.log.info("INFO | zombiecheck | Checking for orphan process with PID: %d", processPID)
      if self.isPidAlive(processPID):
        foundZombie = True
        self.log.info("TEST-UNEXPECTED-FAIL | zombiecheck | child process %d still alive after shutdown", processPID)
        self.killAndGetStack(processPID, utilityPath, debuggerInfo)
    return foundZombie

  def checkForCrashes(self, minidumpDir, symbolsPath):
    return mozcrash.check_for_crashes(minidumpDir, symbolsPath, test_name=self.lastTestSeen)

  def runApp(self, testURL, env, app, profileDir, extraArgs, utilityPath = None,
             xrePath = None, certPath = None,
             debuggerInfo = None, symbolsPath = None,
             timeout = -1, maxTime = None, onLaunch = None,
             detectShutdownLeaks = False, screenshotOnFail=False, testPath=None, bisectChunk=None,
             valgrindPath=None, valgrindArgs=None, valgrindSuppFiles=None, outputHandler=None):
    """
    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.
    """

    if utilityPath == None:
      utilityPath = self.DIST_BIN
    if xrePath == None:
      xrePath = self.DIST_BIN
    if certPath == None:
      certPath = self.CERTS_SRC_DIR
    if timeout == -1:
      timeout = self.DEFAULT_TIMEOUT

    # copy env so we don't munge the caller's environment
    env = dict(env);
    env["NO_EM_RESTART"] = "1"
    tmpfd, processLog = tempfile.mkstemp(suffix='pidlog')
    os.close(tmpfd)
    env["MOZ_PROCESS_LOG"] = processLog


    cmd, args = self.buildCommandLine(app, debuggerInfo, profileDir, testURL, extraArgs)
    startTime = datetime.now()

    if debuggerInfo and debuggerInfo.interactive:
      # If an interactive debugger is attached, don't redirect output,
      # don't use timeouts, and don't capture ctrl-c.
      timeout = None
      maxTime = None
      outputPipe = None
      signal.signal(signal.SIGINT, lambda sigid, frame: None)
    else:
      outputPipe = subprocess.PIPE

    self.lastTestSeen = "automation.py"
    proc = self.Process([cmd] + args,
                 env = self.environment(env, xrePath = xrePath,
                                   crashreporter = not debuggerInfo),
                 stdout = outputPipe,
                 stderr = subprocess.STDOUT)
    self.log.info("INFO | automation.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.
      onLaunch()

    status = self.waitForFinish(proc, utilityPath, timeout, maxTime, startTime, debuggerInfo, symbolsPath,
                                outputHandler=outputHandler)
    self.log.info("INFO | automation.py | Application ran for: %s", str(datetime.now() - startTime))

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

    crashed = self.checkForCrashes(os.path.join(profileDir, "minidumps"), symbolsPath)

    if crashed or zombieProcesses:
      status = 1

    if os.path.exists(processLog):
      os.unlink(processLog)

    return status

  def elf_arm(self, filename):
    data = open(filename, 'rb').read(20)
    return data[:4] == "\x7fELF" and ord(data[18]) == 40 # EM_ARM