DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (5350524bb654)

VCS Links

Line Code
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501
#!/usr/bin/env python
#
# 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/.

import copy
import importlib
import json
import math
import mozdebug
import mozinfo
import os
import os.path
import random
import re
import shutil
import signal
import subprocess
import sys
import tempfile
import time
import traceback

from collections import deque, namedtuple
from distutils import dir_util
from distutils.version import LooseVersion
from multiprocessing import cpu_count
from argparse import ArgumentParser
from subprocess import Popen, PIPE, STDOUT
from tempfile import mkdtemp, gettempdir
from threading import (
    Timer,
    Thread,
    Event,
    current_thread,
)

try:
    import psutil
    HAVE_PSUTIL = True
except Exception:
    HAVE_PSUTIL = False

from automation import Automation
from xpcshellcommandline import parser_desktop

SCRIPT_DIR = os.path.abspath(os.path.realpath(os.path.dirname(__file__)))

HARNESS_TIMEOUT = 5 * 60

# benchmarking on tbpl revealed that this works best for now
NUM_THREADS = int(cpu_count() * 4)

EXPECTED_LOG_ACTIONS = set([
    "test_status",
    "log",
])

# --------------------------------------------------------------
# TODO: this is a hack for mozbase without virtualenv, remove with bug 849900
#
here = os.path.dirname(__file__)
mozbase = os.path.realpath(os.path.join(os.path.dirname(here), 'mozbase'))

if os.path.isdir(mozbase):
    for package in os.listdir(mozbase):
        sys.path.append(os.path.join(mozbase, package))

from manifestparser import TestManifest
from manifestparser.filters import chunk_by_slice, tags, pathprefix
from mozlog import commandline
import mozcrash
import mozinfo
from mozrunner.utils import get_stack_fixer_function

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

# TODO: perhaps this should be in a more generally shared location?
# This regex matches all of the C0 and C1 control characters
# (U+0000 through U+001F; U+007F; U+0080 through U+009F),
# except TAB (U+0009), CR (U+000D), LF (U+000A) and backslash (U+005C).
# A raw string is deliberately not used.
_cleanup_encoding_re = re.compile(u'[\x00-\x08\x0b\x0c\x0e-\x1f\x7f-\x9f\\\\]')
def _cleanup_encoding_repl(m):
    c = m.group(0)
    return '\\\\' if c == '\\' else '\\x{0:02X}'.format(ord(c))
def cleanup_encoding(s):
    """S is either a byte or unicode string.  Either way it may
       contain control characters, unpaired surrogates, reserved code
       points, etc.  If it is a byte string, it is assumed to be
       UTF-8, but it may not be *correct* UTF-8.  Return a
       sanitized unicode object."""
    if not isinstance(s, basestring):
        return unicode(s)
    if not isinstance(s, unicode):
        s = s.decode('utf-8', 'replace')
    # Replace all C0 and C1 control characters with \xNN escapes.
    return _cleanup_encoding_re.sub(_cleanup_encoding_repl, s)

""" Control-C handling """
gotSIGINT = False
def markGotSIGINT(signum, stackFrame):
    global gotSIGINT
    gotSIGINT = True

class XPCShellTestThread(Thread):
    def __init__(self, test_object, event, cleanup_dir_list, retry=True,
            app_dir_key=None, interactive=False,
            verbose=False, pStdout=None, pStderr=None, keep_going=False,
            log=None, usingTSan=False, **kwargs):
        Thread.__init__(self)
        self.daemon = True

        self.test_object = test_object
        self.cleanup_dir_list = cleanup_dir_list
        self.retry = retry

        self.appPath = kwargs.get('appPath')
        self.xrePath = kwargs.get('xrePath')
        self.testingModulesDir = kwargs.get('testingModulesDir')
        self.debuggerInfo = kwargs.get('debuggerInfo')
        self.jsDebuggerInfo = kwargs.get('jsDebuggerInfo')
        self.pluginsPath = kwargs.get('pluginsPath')
        self.httpdManifest = kwargs.get('httpdManifest')
        self.httpdJSPath = kwargs.get('httpdJSPath')
        self.headJSPath = kwargs.get('headJSPath')
        self.testharnessdir = kwargs.get('testharnessdir')
        self.profileName = kwargs.get('profileName')
        self.singleFile = kwargs.get('singleFile')
        self.env = copy.deepcopy(kwargs.get('env'))
        self.symbolsPath = kwargs.get('symbolsPath')
        self.logfiles = kwargs.get('logfiles')
        self.xpcshell = kwargs.get('xpcshell')
        self.xpcsRunArgs = kwargs.get('xpcsRunArgs')
        self.failureManifest = kwargs.get('failureManifest')
        self.jscovdir = kwargs.get('jscovdir')
        self.stack_fixer_function = kwargs.get('stack_fixer_function')
        self._rootTempDir = kwargs.get('tempDir')

        self.app_dir_key = app_dir_key
        self.interactive = interactive
        self.verbose = verbose
        self.pStdout = pStdout
        self.pStderr = pStderr
        self.keep_going = keep_going
        self.log = log
        self.usingTSan = usingTSan

        # only one of these will be set to 1. adding them to the totals in
        # the harness
        self.passCount = 0
        self.todoCount = 0
        self.failCount = 0

        # Context for output processing
        self.output_lines = []
        self.has_failure_output = False
        self.saw_proc_start = False
        self.saw_proc_end = False
        self.complete_command = None
        self.harness_timeout = kwargs.get('harness_timeout')
        self.timedout = False

        # event from main thread to signal work done
        self.event = event
        self.done = False # explicitly set flag so we don't rely on thread.isAlive

    def run(self):
        try:
            self.run_test()
        except Exception as e:
            self.exception = e
            self.traceback = traceback.format_exc()
        else:
            self.exception = None
            self.traceback = None
        if self.retry:
            self.log.info("%s failed or timed out, will retry." %
                          self.test_object['id'])
        self.done = True
        self.event.set()

    def kill(self, proc):
        """
          Simple wrapper to kill a process.
          On a remote system, this is overloaded to handle remote process communication.
        """
        return proc.kill()

    def removeDir(self, dirname):
        """
          Simple wrapper to remove (recursively) a given directory.
          On a remote system, we need to overload this to work on the remote filesystem.
        """
        shutil.rmtree(dirname)

    def poll(self, proc):
        """
          Simple wrapper to check if a process has terminated.
          On a remote system, this is overloaded to handle remote process communication.
        """
        return proc.poll()

    def createLogFile(self, test_file, stdout):
        """
          For a given test file and stdout buffer, create a log file.
          On a remote system we have to fix the test name since it can contain directories.
        """
        with open(test_file + ".log", "w") as f:
            f.write(stdout)

    def getReturnCode(self, proc):
        """
          Simple wrapper to get the return code for a given process.
          On a remote system we overload this to work with the remote process management.
        """
        return proc.returncode

    def communicate(self, proc):
        """
          Simple wrapper to communicate with a process.
          On a remote system, this is overloaded to handle remote process communication.
        """
        # Processing of incremental output put here to
        # sidestep issues on remote platforms, where what we know
        # as proc is a file pulled off of a device.
        if proc.stdout:
            while True:
                line = proc.stdout.readline()
                if not line:
                    break
                self.process_line(line)

            if self.saw_proc_start and not self.saw_proc_end:
                self.has_failure_output = True

        return proc.communicate()

    def launchProcess(self, cmd, stdout, stderr, env, cwd, timeout=None):
        """
          Simple wrapper to launch a process.
          On a remote system, this is more complex and we need to overload this function.
        """
        # timeout is needed by remote xpcshell to extend the
        # devicemanager.shell() timeout. It is not used in this function.
        if HAVE_PSUTIL:
            popen_func = psutil.Popen
        else:
            popen_func = Popen
        proc = popen_func(cmd, stdout=stdout, stderr=stderr,
                    env=env, cwd=cwd)
        return proc

    def checkForCrashes(self,
                        dump_directory,
                        symbols_path,
                        test_name=None):
        """
          Simple wrapper to check for crashes.
          On a remote system, this is more complex and we need to overload this function.
        """
        return mozcrash.check_for_crashes(dump_directory, symbols_path, test_name=test_name)

    def logCommand(self, name, completeCmd, testdir):
        self.log.info("%s | full command: %r" % (name, completeCmd))
        self.log.info("%s | current directory: %r" % (name, testdir))
        # Show only those environment variables that are changed from
        # the ambient environment.
        changedEnv = (set("%s=%s" % i for i in self.env.iteritems())
                      - set("%s=%s" % i for i in os.environ.iteritems()))
        self.log.info("%s | environment: %s" % (name, list(changedEnv)))

    def killTimeout(self, proc):
        Automation().killAndGetStackNoScreenshot(proc.pid,
                                                 self.appPath,
                                                 self.debuggerInfo)

    def postCheck(self, proc):
        """Checks for a still-running test process, kills it and fails the test if found.
        We can sometimes get here before the process has terminated, which would
        cause removeDir() to fail - so check for the process and kill it if needed.
        """
        if proc and self.poll(proc) is None:
            self.kill(proc)
            message = "%s | Process still running after test!" % self.test_object['id']
            if self.retry:
                self.log.info(message)
                return

            self.log.error(message)
            self.log_full_output()
            self.failCount = 1

    def testTimeout(self, proc):
        if self.test_object['expected'] == 'pass':
            expected = 'PASS'
        else:
            expected = 'FAIL'

        if self.retry:
            self.log.test_end(self.test_object['id'], 'TIMEOUT',
                              expected='TIMEOUT',
                              message="Test timed out")
        else:
            self.failCount = 1
            self.log.test_end(self.test_object['id'], 'TIMEOUT',
                              expected=expected,
                              message="Test timed out")
            self.log_full_output()

        self.done = True
        self.timedout = True
        self.killTimeout(proc)
        self.log.info("xpcshell return code: %s" % self.getReturnCode(proc))
        self.postCheck(proc)
        self.clean_temp_dirs(self.test_object['path'])

    def buildCmdTestFile(self, name):
        """
          Build the command line arguments for the test file.
          On a remote system, this may be overloaded to use a remote path structure.
        """
        return ['-e', 'const _TEST_FILE = ["%s"];' %
                  name.replace('\\', '/')]

    def setupTempDir(self):
        tempDir = mkdtemp(prefix='xpc-other-', dir=self._rootTempDir)
        self.env["XPCSHELL_TEST_TEMP_DIR"] = tempDir
        if self.interactive:
            self.log.info("temp dir is %s" % tempDir)
        return tempDir

    def setupPluginsDir(self):
        if not os.path.isdir(self.pluginsPath):
            return None

        pluginsDir = mkdtemp(prefix='xpc-plugins-', dir=self._rootTempDir)
        # shutil.copytree requires dst to not exist. Deleting the tempdir
        # would make a race condition possible in a concurrent environment,
        # so we are using dir_utils.copy_tree which accepts an existing dst
        dir_util.copy_tree(self.pluginsPath, pluginsDir)
        if self.interactive:
            self.log.info("plugins dir is %s" % pluginsDir)
        return pluginsDir

    def setupProfileDir(self):
        """
          Create a temporary folder for the profile and set appropriate environment variables.
          When running check-interactive and check-one, the directory is well-defined and
          retained for inspection once the tests complete.

          On a remote system, this may be overloaded to use a remote path structure.
        """
        if self.interactive or self.singleFile:
            profileDir = os.path.join(gettempdir(), self.profileName, "xpcshellprofile")
            try:
                # This could be left over from previous runs
                self.removeDir(profileDir)
            except:
                pass
            os.makedirs(profileDir)
        else:
            profileDir = mkdtemp(prefix='xpc-profile-', dir=self._rootTempDir)
        self.env["XPCSHELL_TEST_PROFILE_DIR"] = profileDir
        if self.interactive or self.singleFile:
            self.log.info("profile dir is %s" % profileDir)
        return profileDir

    def setupMozinfoJS(self):
        mozInfoJSPath = os.path.join(self.profileDir, 'mozinfo.json')
        mozInfoJSPath = mozInfoJSPath.replace('\\', '\\\\')
        mozinfo.output_to_file(mozInfoJSPath)
        return mozInfoJSPath

    def buildCmdHead(self, headfiles, tailfiles, xpcscmd):
        """
          Build the command line arguments for the head and tail files,
          along with the address of the webserver which some tests require.

          On a remote system, this is overloaded to resolve quoting issues over a secondary command line.
        """
        cmdH = ", ".join(['"' + f.replace('\\', '/') + '"'
                       for f in headfiles])
        cmdT = ", ".join(['"' + f.replace('\\', '/') + '"'
                       for f in tailfiles])

        dbgport = 0 if self.jsDebuggerInfo is None else self.jsDebuggerInfo.port

        return xpcscmd + \
                ['-e', 'const _SERVER_ADDR = "localhost"',
                 '-e', 'const _HEAD_FILES = [%s];' % cmdH,
                 '-e', 'const _TAIL_FILES = [%s];' % cmdT,
                 '-e', 'const _JSDEBUGGER_PORT = %d;' % dbgport,
                ]

    def getHeadAndTailFiles(self, test):
        """Obtain lists of head- and tail files.  Returns a tuple
        containing a list of head files and a list of tail files.
        """
        def sanitize_list(s, kind):
            for f in s.strip().split(' '):
                f = f.strip()
                if len(f) < 1:
                    continue

                path = os.path.normpath(os.path.join(test['here'], f))
                if not os.path.exists(path):
                    raise Exception('%s file does not exist: %s' % (kind, path))

                if not os.path.isfile(path):
                    raise Exception('%s file is not a file: %s' % (kind, path))

                yield path

        headlist = test.get('head', '')
        taillist = test.get('tail', '')
        return (list(sanitize_list(headlist, 'head')),
                list(sanitize_list(taillist, 'tail')))

    def buildXpcsCmd(self):
        """
          Load the root head.js file as the first file in our test path, before other head, test, and tail files.
          On a remote system, we overload this to add additional command line arguments, so this gets overloaded.
        """
        # - NOTE: if you rename/add any of the constants set here, update
        #   do_load_child_test_harness() in head.js
        if not self.appPath:
            self.appPath = self.xrePath

        self.xpcsCmd = [
            self.xpcshell,
            '-g', self.xrePath,
            '-a', self.appPath,
            '-r', self.httpdManifest,
            '-m',
            '-s',
            '-e', 'const _HEAD_JS_PATH = "%s";' % self.headJSPath,
            '-e', 'const _MOZINFO_JS_PATH = "%s";' % self.mozInfoJSPath,
        ]

        if self.testingModulesDir:
            # Escape backslashes in string literal.
            sanitized = self.testingModulesDir.replace('\\', '\\\\')
            self.xpcsCmd.extend([
                '-e',
                'const _TESTING_MODULES_DIR = "%s";' % sanitized
            ])

        self.xpcsCmd.extend(['-f', os.path.join(self.testharnessdir, 'head.js')])

        if self.debuggerInfo:
            self.xpcsCmd = [self.debuggerInfo.path] + self.debuggerInfo.args + self.xpcsCmd

        # Automation doesn't specify a pluginsPath and xpcshell defaults to
        # $APPDIR/plugins. We do the same here so we can carry on with
        # setting up every test with its own plugins directory.
        if not self.pluginsPath:
            self.pluginsPath = os.path.join(self.appPath, 'plugins')

        self.pluginsDir = self.setupPluginsDir()
        if self.pluginsDir:
            self.xpcsCmd.extend(['-p', self.pluginsDir])

    def cleanupDir(self, directory, name):
        if not os.path.exists(directory):
            return

        TRY_LIMIT = 25 # up to TRY_LIMIT attempts (one every second), because
                       # the Windows filesystem is slow to react to the changes
        try_count = 0
        while try_count < TRY_LIMIT:
            try:
                self.removeDir(directory)
            except OSError:
                self.log.info("Failed to remove directory: %s. Waiting." % directory)
                # We suspect the filesystem may still be making changes. Wait a
                # little bit and try again.
                time.sleep(1)
                try_count += 1
            else:
                # removed fine
                return

        # we try cleaning up again later at the end of the run
        self.cleanup_dir_list.append(directory)

    def clean_temp_dirs(self, name):
        # We don't want to delete the profile when running check-interactive
        # or check-one.
        if self.profileDir and not self.interactive and not self.singleFile:
            self.cleanupDir(self.profileDir, name)

        self.cleanupDir(self.tempDir, name)

        if self.pluginsDir:
            self.cleanupDir(self.pluginsDir, name)

    def parse_output(self, output):
        """Parses process output for structured messages and saves output as it is
        read. Sets self.has_failure_output in case of evidence of a failure"""
        for line_string in output.splitlines():
            self.process_line(line_string)

        if self.saw_proc_start and not self.saw_proc_end:
            self.has_failure_output = True

    def fix_text_output(self, line):
        line = cleanup_encoding(line)
        if self.stack_fixer_function is not None:
            return self.stack_fixer_function(line)
        return line

    def log_line(self, line):
        """Log a line of output (either a parser json object or text output from
        the test process"""
        if isinstance(line, basestring):
            line = self.fix_text_output(line).rstrip('\r\n')
            self.log.process_output(self.proc_ident,
                                    line,
                                    command=self.complete_command)
        else:
            if 'message' in line:
                line['message'] = self.fix_text_output(line['message'])
            if 'xpcshell_process' in line:
                line['thread'] =  ' '.join([current_thread().name, line['xpcshell_process']])
            else:
                line['thread'] = current_thread().name
            self.log.log_raw(line)

    def log_full_output(self):
        """Logs any buffered output from the test process, and clears the buffer."""
        if not self.output_lines:
            return
        self.log.info(">>>>>>>")
        for line in self.output_lines:
            self.log_line(line)
        self.log.info("<<<<<<<")
        self.output_lines = []

    def report_message(self, message):
        """Stores or logs a json log message in mozlog format."""
        if self.verbose:
            self.log_line(message)
        else:
            self.output_lines.append(message)

    def process_line(self, line_string):
        """ Parses a single line of output, determining its significance and
        reporting a message.
        """
        if not line_string.strip():
            return

        try:
            line_object = json.loads(line_string)
            if not isinstance(line_object, dict):
                self.report_message(line_string)
                return
        except ValueError:
            self.report_message(line_string)
            return

        if ('action' not in line_object or
            line_object['action'] not in EXPECTED_LOG_ACTIONS):
            # The test process output JSON.
            self.report_message(line_string)
            return

        action = line_object['action']

        self.has_failure_output = (self.has_failure_output or
                                   'expected' in line_object or
                                   action == 'log' and line_object['level'] == 'ERROR')

        self.report_message(line_object)

        if action == 'log' and line_object['message'] == 'CHILD-TEST-STARTED':
             self.saw_proc_start = True
        elif action == 'log' and line_object['message'] == 'CHILD-TEST-COMPLETED':
            self.saw_proc_end = True

    def run_test(self):
        """Run an individual xpcshell test."""
        global gotSIGINT

        name = self.test_object['id']
        path = self.test_object['path']

        # Check for skipped tests
        if 'disabled' in self.test_object:
            message = self.test_object['disabled']
            if not message:
                message = 'disabled from xpcshell manifest'
            self.log.test_start(name)
            self.log.test_end(name, 'SKIP', message=message)

            self.retry = False
            self.keep_going = True
            return

        # Check for known-fail tests
        expect_pass = self.test_object['expected'] == 'pass'

        # By default self.appPath will equal the gre dir. If specified in the
        # xpcshell.ini file, set a different app dir for this test.
        if self.app_dir_key and self.app_dir_key in self.test_object:
            rel_app_dir = self.test_object[self.app_dir_key]
            rel_app_dir = os.path.join(self.xrePath, rel_app_dir)
            self.appPath = os.path.abspath(rel_app_dir)
        else:
            self.appPath = None

        test_dir = os.path.dirname(path)

        # Create a profile and a temp dir that the JS harness can stick
        # a profile and temporary data in
        self.profileDir = self.setupProfileDir()
        self.tempDir = self.setupTempDir()
        self.mozInfoJSPath = self.setupMozinfoJS()

        self.buildXpcsCmd()
        head_files, tail_files = self.getHeadAndTailFiles(self.test_object)
        cmdH = self.buildCmdHead(head_files, tail_files, self.xpcsCmd)

        # The test file will have to be loaded after the head files.
        cmdT = self.buildCmdTestFile(path)

        args = self.xpcsRunArgs[:]
        if 'debug' in self.test_object:
            args.insert(0, '-d')

        # The test name to log
        cmdI = ['-e', 'const _TEST_NAME = "%s"' % name]

        # Directory for javascript code coverage output, null by default.
        cmdC = ['-e', 'const _JSCOV_DIR = null']
        if self.jscovdir:
            cmdC = ['-e', 'const _JSCOV_DIR = "%s"' % self.jscovdir.replace('\\', '/')]
            self.complete_command = cmdH + cmdT + cmdI + cmdC + args
        else:
            self.complete_command = cmdH + cmdT + cmdI + args

        if self.test_object.get('dmd') == 'true':
            if sys.platform.startswith('linux'):
                preloadEnvVar = 'LD_PRELOAD'
                libdmd = os.path.join(self.xrePath, 'libdmd.so')
            elif sys.platform == 'osx' or sys.platform == 'darwin':
                preloadEnvVar = 'DYLD_INSERT_LIBRARIES'
                # self.xrePath is <prefix>/Contents/Resources.
                # We need <prefix>/Contents/MacOS/libdmd.dylib.
                contents_dir = os.path.dirname(self.xrePath)
                libdmd = os.path.join(contents_dir, 'MacOS', 'libdmd.dylib')
            elif sys.platform == 'win32':
                preloadEnvVar = 'MOZ_REPLACE_MALLOC_LIB'
                libdmd = os.path.join(self.xrePath, 'dmd.dll')

            self.env['PYTHON'] = sys.executable
            self.env['BREAKPAD_SYMBOLS_PATH'] = self.symbolsPath
            self.env['DMD_PRELOAD_VAR'] = preloadEnvVar
            self.env['DMD_PRELOAD_VALUE'] = libdmd

        if self.test_object.get('subprocess') == 'true':
            self.env['PYTHON'] = sys.executable

        testTimeoutInterval = self.harness_timeout
        # Allow a test to request a multiple of the timeout if it is expected to take long
        if 'requesttimeoutfactor' in self.test_object:
            testTimeoutInterval *= int(self.test_object['requesttimeoutfactor'])

        testTimer = None
        if not self.interactive and not self.debuggerInfo and not self.jsDebuggerInfo:
            testTimer = Timer(testTimeoutInterval, lambda: self.testTimeout(proc))
            testTimer.start()

        proc = None
        process_output = None

        try:
            self.log.test_start(name)
            if self.verbose:
                self.logCommand(name, self.complete_command, test_dir)

            proc = self.launchProcess(self.complete_command,
                stdout=self.pStdout, stderr=self.pStderr, env=self.env, cwd=test_dir, timeout=testTimeoutInterval)

            if hasattr(proc, "pid"):
                self.proc_ident = proc.pid
            else:
                # On mobile, "proc" is just a file.
                self.proc_ident = name

            if self.interactive:
                self.log.info("%s | Process ID: %d" % (name, self.proc_ident))

            # Communicate returns a tuple of (stdout, stderr), however we always
            # redirect stderr to stdout, so the second element is ignored.
            process_output, _ = self.communicate(proc)

            if self.interactive:
                # Not sure what else to do here...
                self.keep_going = True
                return

            if testTimer:
                testTimer.cancel()

            if process_output:
                # For the remote case, stdout is not yet depleted, so we parse
                # it here all at once.
                self.parse_output(process_output)

            return_code = self.getReturnCode(proc)

            # TSan'd processes return 66 if races are detected.  This isn't
            # good in the sense that there's no way to distinguish between
            # a process that would normally have returned zero but has races,
            # and a race-free process that returns 66.  But I don't see how
            # to do better.  This ambiguity is at least constrained to the
            # with-TSan case.  It doesn't affect normal builds.
            #
            # This also assumes that the magic value 66 isn't overridden by
            # a TSAN_OPTIONS=exitcode=<number> environment variable setting.
            #
            TSAN_EXIT_CODE_WITH_RACES = 66

            return_code_ok = (return_code == 0 or
                              (self.usingTSan and
                               return_code == TSAN_EXIT_CODE_WITH_RACES))
            passed = (not self.has_failure_output) and return_code_ok

            status = 'PASS' if passed else 'FAIL'
            expected = 'PASS' if expect_pass else 'FAIL'
            message = 'xpcshell return code: %d' % return_code

            if self.timedout:
                return

            if status != expected:
                if self.retry:
                    self.log.test_end(name, status, expected=status,
                                      message="Test failed or timed out, will retry")
                    self.clean_temp_dirs(path)
                    return

                self.log.test_end(name, status, expected=expected, message=message)
                self.log_full_output()

                self.failCount += 1

                if self.failureManifest:
                    with open(self.failureManifest, 'a') as f:
                        f.write('[%s]\n' % self.test_object['path'])
                        for k, v in self.test_object.items():
                            f.write('%s = %s\n' % (k, v))

            else:
                # If TSan reports a race, dump the output, else we can't
                # diagnose what the problem was.  See comments above about
                # the significance of TSAN_EXIT_CODE_WITH_RACES.
                if self.usingTSan and return_code == TSAN_EXIT_CODE_WITH_RACES:
                    self.log_full_output()

                self.log.test_end(name, status, expected=expected, message=message)
                if self.verbose:
                    self.log_full_output()

                self.retry = False

                if expect_pass:
                    self.passCount = 1
                else:
                    self.todoCount = 1

            if self.checkForCrashes(self.tempDir, self.symbolsPath, test_name=name):
                if self.retry:
                    self.clean_temp_dirs(path)
                    return

                # If we assert during shutdown there's a chance the test has passed
                # but we haven't logged full output, so do so here.
                self.log_full_output()
                self.failCount = 1

            if self.logfiles and process_output:
                self.createLogFile(name, process_output)

        finally:
            self.postCheck(proc)
            self.clean_temp_dirs(path)

        if gotSIGINT:
            self.log.error("Received SIGINT (control-C) during test execution")
            if self.keep_going:
                gotSIGINT = False
            else:
                self.keep_going = False
                return

        self.keep_going = True

class XPCShellTests(object):

    def __init__(self, log=None):
        """ Initializes node status and logger. """
        self.log = log
        self.harness_timeout = HARNESS_TIMEOUT
        self.nodeProc = {}

    def getTestManifest(self, manifest):
        if isinstance(manifest, TestManifest):
            return manifest
        elif manifest is not None:
            manifest = os.path.normpath(os.path.abspath(manifest))
            if os.path.isfile(manifest):
                return TestManifest([manifest], strict=True)
            else:
                ini_path = os.path.join(manifest, "xpcshell.ini")
        else:
            ini_path = os.path.join(SCRIPT_DIR, "tests", "xpcshell.ini")

        if os.path.exists(ini_path):
            return TestManifest([ini_path], strict=True)
        else:
            print >> sys.stderr, ("Failed to find manifest at %s; use --manifest "
                                  "to set path explicitly." % (ini_path,))
            sys.exit(1)

    def buildTestList(self, test_tags=None, test_paths=None):
        """
          read the xpcshell.ini manifest and set self.alltests to be
          an array of test objects.

          if we are chunking tests, it will be done here as well
        """

        if test_paths is None:
            test_paths = []

        if len(test_paths) == 1 and test_paths[0].endswith(".js"):
            self.singleFile = os.path.basename(test_paths[0])
        else:
            self.singleFile = None

        mp = self.getTestManifest(self.manifest)

        filters = []
        if test_tags:
            filters.append(tags(test_tags))

        if test_paths:
            filters.append(pathprefix(test_paths))

        if self.singleFile is None and self.totalChunks > 1:
            filters.append(chunk_by_slice(self.thisChunk, self.totalChunks))
        try:
            self.alltests = mp.active_tests(filters=filters, **mozinfo.info)
        except TypeError:
            sys.stderr.write("*** offending mozinfo.info: %s\n" % repr(mozinfo.info))
            raise

        if len(self.alltests) == 0:
            self.log.error("no tests to run using specified "
                           "combination of filters: {}".format(
                                mp.fmt_filters()))

        if self.dump_tests:
            self.dump_tests = os.path.expanduser(self.dump_tests)
            assert os.path.exists(os.path.dirname(self.dump_tests))
            with open(self.dump_tests, 'w') as dumpFile:
                dumpFile.write(json.dumps({'active_tests': self.alltests}))

            self.log.info("Dumping active_tests to %s file." % self.dump_tests)
            sys.exit()

    def setAbsPath(self):
        """
          Set the absolute path for xpcshell, httpdjspath and xrepath.
          These 3 variables depend on input from the command line and we need to allow for absolute paths.
          This function is overloaded for a remote solution as os.path* won't work remotely.
        """
        self.testharnessdir = os.path.dirname(os.path.abspath(__file__))
        self.headJSPath = self.testharnessdir.replace("\\", "/") + "/head.js"
        self.xpcshell = os.path.abspath(self.xpcshell)

        if self.xrePath is None:
            self.xrePath = os.path.dirname(self.xpcshell)
            if mozinfo.isMac:
                # Check if we're run from an OSX app bundle and override
                # self.xrePath if we are.
                appBundlePath = os.path.join(os.path.dirname(os.path.dirname(self.xpcshell)), 'Resources')
                if os.path.exists(os.path.join(appBundlePath, 'application.ini')):
                    self.xrePath = appBundlePath
        else:
            self.xrePath = os.path.abspath(self.xrePath)

        # httpd.js belongs in xrePath/components, which is Contents/Resources on mac
        self.httpdJSPath = os.path.join(self.xrePath, 'components', 'httpd.js')
        self.httpdJSPath = self.httpdJSPath.replace('\\', '/')

        self.httpdManifest = os.path.join(self.xrePath, 'components', 'httpd.manifest')
        self.httpdManifest = self.httpdManifest.replace('\\', '/')

        if self.mozInfo is None:
            self.mozInfo = os.path.join(self.testharnessdir, "mozinfo.json")

    def buildCoreEnvironment(self):
        """
          Add environment variables likely to be used across all platforms, including remote systems.
        """
        # Make assertions fatal
        self.env["XPCOM_DEBUG_BREAK"] = "stack-and-abort"
        # Crash reporting interferes with debugging
        if not self.debuggerInfo:
            self.env["MOZ_CRASHREPORTER"] = "1"
        # Don't launch the crash reporter client
        self.env["MOZ_CRASHREPORTER_NO_REPORT"] = "1"
        # Don't permit remote 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.
        self.env.setdefault('MOZ_DISABLE_NONLOCAL_CONNECTIONS', '1')

    def buildEnvironment(self):
        """
          Create and returns a dictionary of self.env to include all the appropriate env variables and values.
          On a remote system, we overload this to set different values and are missing things like os.environ and PATH.
        """
        self.env = dict(os.environ)
        self.buildCoreEnvironment()
        if sys.platform == 'win32':
            self.env["PATH"] = self.env["PATH"] + ";" + self.xrePath
        elif sys.platform in ('os2emx', 'os2knix'):
            os.environ["BEGINLIBPATH"] = self.xrePath + ";" + self.env["BEGINLIBPATH"]
            os.environ["LIBPATHSTRICT"] = "T"
        elif sys.platform == 'osx' or sys.platform == "darwin":
            self.env["DYLD_LIBRARY_PATH"] = os.path.join(os.path.dirname(self.xrePath), 'MacOS')
        else: # unix or linux?
            if not "LD_LIBRARY_PATH" in self.env or self.env["LD_LIBRARY_PATH"] is None:
                self.env["LD_LIBRARY_PATH"] = self.xrePath
            else:
                self.env["LD_LIBRARY_PATH"] = ":".join([self.xrePath, self.env["LD_LIBRARY_PATH"]])

        usingASan = "asan" in self.mozInfo and self.mozInfo["asan"]
        usingTSan = "tsan" in self.mozInfo and self.mozInfo["tsan"]
        if usingASan or usingTSan:
            # symbolizer support
            llvmsym = os.path.join(self.xrePath, "llvm-symbolizer")
            if os.path.isfile(llvmsym):
                if usingASan:
                    self.env["ASAN_SYMBOLIZER_PATH"] = llvmsym
                else:
                    oldTSanOptions = self.env.get("TSAN_OPTIONS", "")
                    self.env["TSAN_OPTIONS"] = "external_symbolizer_path={} {}".format(llvmsym, oldTSanOptions)
                self.log.info("runxpcshelltests.py | using symbolizer at %s" % llvmsym)
            else:
                self.log.error("TEST-UNEXPECTED-FAIL | runxpcshelltests.py | Failed to find symbolizer at %s" % llvmsym)

        return self.env

    def getPipes(self):
        """
          Determine the value of the stdout and stderr for the test.
          Return value is a list (pStdout, pStderr).
        """
        if self.interactive:
            pStdout = None
            pStderr = None
        else:
            if (self.debuggerInfo and self.debuggerInfo.interactive):
                pStdout = None
                pStderr = None
            else:
                if sys.platform == 'os2emx':
                    pStdout = None
                else:
                    pStdout = PIPE
                pStderr = STDOUT
        return pStdout, pStderr

    def verifyDirPath(self, dirname):
        """
          Simple wrapper to get the absolute path for a given directory name.
          On a remote system, we need to overload this to work on the remote filesystem.
        """
        return os.path.abspath(dirname)

    def trySetupNode(self):
        """
          Run node for HTTP/2 tests, if available, and updates mozinfo as appropriate.
        """
        nodeMozInfo = {'hasNode': False} # Assume the worst
        nodeBin = None

        # We try to find the node executable in the path given to us by the user in
        # the MOZ_NODE_PATH environment variable
        localPath = os.getenv('MOZ_NODE_PATH', None)
        if localPath and os.path.exists(localPath) and os.path.isfile(localPath):
            try:
                version_str = subprocess.check_output([localPath, "--version"],
                                                      stderr=subprocess.STDOUT)
                # nodejs prefixes its version strings with "v"
                version = LooseVersion(version_str.lstrip('v'))
                # Use node only if node version is >=5.0.0 because
                # node did not support ALPN until this version.
                if version >= LooseVersion("5.0.0"):
                    nodeBin = localPath
            except (subprocess.CalledProcessError, OSError), e:
                self.log.error('Could not retrieve node version: %s' % str(e))

        if os.getenv('MOZ_ASSUME_NODE_RUNNING', None):
            self.log.info('Assuming required node servers are already running')
            nodeMozInfo['hasNode'] = True
        elif nodeBin:
            self.log.info('Found node at %s' % (nodeBin,))

            def startServer(name, serverJs):
                if os.path.exists(serverJs):
                    # OK, we found our server, let's try to get it running
                    self.log.info('Found %s at %s' % (name, serverJs))
                    try:
                        # We pipe stdin to node because the server will exit when its
                        # stdin reaches EOF
                        process = Popen([nodeBin, serverJs], stdin=PIPE, stdout=PIPE,
                                stderr=PIPE, env=self.env, cwd=os.getcwd())
                        self.nodeProc[name] = process

                        # Check to make sure the server starts properly by waiting for it to
                        # tell us it's started
                        msg = process.stdout.readline()
                        if 'server listening' in msg:
                            nodeMozInfo['hasNode'] = True
                            searchObj = re.search( r'HTTP2 server listening on port (.*)', msg, 0)
                            if searchObj:
                              self.env["MOZHTTP2_PORT"] = searchObj.group(1)
                    except OSError, e:
                        # This occurs if the subprocess couldn't be started
                        self.log.error('Could not run %s server: %s' % (name, str(e)))

            myDir = os.path.split(os.path.abspath(__file__))[0]
            startServer('moz-http2', os.path.join(myDir, 'moz-http2', 'moz-http2.js'))

        mozinfo.update(nodeMozInfo)

    def shutdownNode(self):
        """
          Shut down our node process, if it exists
        """
        for name, proc in self.nodeProc.iteritems():
            self.log.info('Node %s server shutting down ...' % name)
            if proc.poll() is not None:
                self.log.info('Node server %s already dead %s' % (name, proc.poll()))
            else:
                proc.terminate()
            def dumpOutput(fd, label):
                firstTime = True
                for msg in fd:
                    if firstTime:
                        firstTime = False;
                        self.log.info('Process %s' % label)
                    self.log.info(msg)
            dumpOutput(proc.stdout, "stdout")
            dumpOutput(proc.stderr, "stderr")

    def buildXpcsRunArgs(self):
        """
          Add arguments to run the test or make it interactive.
        """
        if self.interactive:
            self.xpcsRunArgs = [
            '-e', 'print("To start the test, type |_execute_test();|.");',
            '-i']
        else:
            self.xpcsRunArgs = ['-e', '_execute_test(); quit(0);']

    def addTestResults(self, test):
        self.passCount += test.passCount
        self.failCount += test.failCount
        self.todoCount += test.todoCount

    def makeTestId(self, test_object):
        """Calculate an identifier for a test based on its path or a combination of
        its path and the source manifest."""

        relpath_key = 'file_relpath' if 'file_relpath' in test_object else 'relpath'
        path = test_object[relpath_key].replace('\\', '/');
        if 'dupe-manifest' in test_object and 'ancestor-manifest' in test_object:
            return '%s:%s' % (os.path.basename(test_object['ancestor-manifest']), path)
        return path

    def runTests(self, xpcshell=None, xrePath=None, appPath=None, symbolsPath=None,
                 manifest=None, testPaths=None, mobileArgs=None, tempDir=None,
                 interactive=False, verbose=False, keepGoing=False, logfiles=True,
                 thisChunk=1, totalChunks=1, debugger=None,
                 debuggerArgs=None, debuggerInteractive=False,
                 profileName=None, mozInfo=None, sequential=False, shuffle=False,
                 testingModulesDir=None, pluginsPath=None,
                 testClass=XPCShellTestThread, failureManifest=None,
                 log=None, stream=None, jsDebugger=False, jsDebuggerPort=0,
                 test_tags=None, dump_tests=None, utility_path=None,
                 rerun_failures=False, failure_manifest=None, jscovdir=None, **otherOptions):
        """Run xpcshell tests.

        |xpcshell|, is the xpcshell executable to use to run the tests.
        |xrePath|, if provided, is the path to the XRE to use.
        |appPath|, if provided, is the path to an application directory.
        |symbolsPath|, if provided is the path to a directory containing
          breakpad symbols for processing crashes in tests.
        |manifest|, if provided, is a file containing a list of
          test directories to run.
        |testPaths|, if provided, is a list of paths to files or directories containing
                     tests to run.
        |pluginsPath|, if provided, custom plugins directory to be returned from
          the xpcshell dir svc provider for NS_APP_PLUGINS_DIR_LIST.
        |interactive|, if set to True, indicates to provide an xpcshell prompt
          instead of automatically executing the test.
        |verbose|, if set to True, will cause stdout/stderr from tests to
          be printed always
        |logfiles|, if set to False, indicates not to save output to log files.
          Non-interactive only option.
        |debugger|, if set, specifies the name of the debugger that will be used
          to launch xpcshell.
        |debuggerArgs|, if set, specifies arguments to use with the debugger.
        |debuggerInteractive|, if set, allows the debugger to be run in interactive
          mode.
        |profileName|, if set, specifies the name of the application for the profile
          directory if running only a subset of tests.
        |mozInfo|, if set, specifies specifies build configuration information, either as a filename containing JSON, or a dict.
        |shuffle|, if True, execute tests in random order.
        |testingModulesDir|, if provided, specifies where JS modules reside.
          xpcshell will register a resource handler mapping this path.
        |tempDir|, if provided, specifies a temporary directory to use.
        |otherOptions| may be present for the convenience of subclasses
        """

        global gotSIGINT

        # Try to guess modules directory.
        # This somewhat grotesque hack allows the buildbot machines to find the
        # modules directory without having to configure the buildbot hosts. This
        # code path should never be executed in local runs because the build system
        # should always set this argument.
        if not testingModulesDir:
            possible = os.path.join(here, os.path.pardir, 'modules')

            if os.path.isdir(possible):
                testingModulesDir = possible

        if rerun_failures:
            if os.path.exists(failure_manifest):
                rerun_manifest = os.path.join(os.path.dirname(failure_manifest), "rerun.ini")
                shutil.copyfile(failure_manifest, rerun_manifest)
                os.remove(failure_manifest)
                manifest = rerun_manifest
            else:
                print >> sys.stderr, "No failures were found to re-run."
                sys.exit(1)

        if testingModulesDir:
            # The resource loader expects native paths. Depending on how we were
            # invoked, a UNIX style path may sneak in on Windows. We try to
            # normalize that.
            testingModulesDir = os.path.normpath(testingModulesDir)

            if not os.path.isabs(testingModulesDir):
                testingModulesDir = os.path.abspath(testingModulesDir)

            if not testingModulesDir.endswith(os.path.sep):
                testingModulesDir += os.path.sep

        self.debuggerInfo = None

        if debugger:
            self.debuggerInfo = mozdebug.get_debugger_info(debugger, debuggerArgs, debuggerInteractive)

        self.jsDebuggerInfo = None
        if jsDebugger:
            # A namedtuple let's us keep .port instead of ['port']
            JSDebuggerInfo = namedtuple('JSDebuggerInfo', ['port'])
            self.jsDebuggerInfo = JSDebuggerInfo(port=jsDebuggerPort)

        self.xpcshell = xpcshell
        self.xrePath = xrePath
        self.appPath = appPath
        self.symbolsPath = symbolsPath
        self.tempDir = os.path.normpath(tempDir or tempfile.gettempdir())
        self.manifest = manifest
        self.dump_tests = dump_tests
        self.interactive = interactive
        self.verbose = verbose
        self.keepGoing = keepGoing
        self.logfiles = logfiles
        self.totalChunks = totalChunks
        self.thisChunk = thisChunk
        self.profileName = profileName or "xpcshell"
        self.mozInfo = mozInfo
        self.testingModulesDir = testingModulesDir
        self.pluginsPath = pluginsPath
        self.sequential = sequential
        self.failure_manifest = failure_manifest
        self.jscovdir = jscovdir

        self.testCount = 0
        self.passCount = 0
        self.failCount = 0
        self.todoCount = 0

        self.setAbsPath()
        self.buildXpcsRunArgs()

        self.event = Event()

        # Handle filenames in mozInfo
        if not isinstance(self.mozInfo, dict):
            mozInfoFile = self.mozInfo
            if not os.path.isfile(mozInfoFile):
                self.log.error("Error: couldn't find mozinfo.json at '%s'. Perhaps you need to use --build-info-json?" % mozInfoFile)
                return False
            self.mozInfo = json.load(open(mozInfoFile))

        # mozinfo.info is used as kwargs.  Some builds are done with
        # an older Python that can't handle Unicode keys in kwargs.
        # All of the keys in question should be ASCII.
        fixedInfo = {}
        for k, v in self.mozInfo.items():
            if isinstance(k, unicode):
                k = k.encode('ascii')
            fixedInfo[k] = v
        self.mozInfo = fixedInfo

        mozinfo.update(self.mozInfo)

        self.stack_fixer_function = None
        if utility_path and os.path.exists(utility_path):
            self.stack_fixer_function = get_stack_fixer_function(utility_path, self.symbolsPath)

        # buildEnvironment() needs mozInfo, so we call it after mozInfo is initialized.
        self.buildEnvironment()

        # The appDirKey is a optional entry in either the default or individual test
        # sections that defines a relative application directory for test runs. If
        # defined we pass 'grePath/$appDirKey' for the -a parameter of the xpcshell
        # test harness.
        appDirKey = None
        if "appname" in self.mozInfo:
            appDirKey = self.mozInfo["appname"] + "-appdir"

        # We have to do this before we build the test list so we know whether or
        # not to run tests that depend on having the node http/2 server
        self.trySetupNode()

        pStdout, pStderr = self.getPipes()

        self.buildTestList(test_tags, testPaths)
        if self.singleFile:
            self.sequential = True

        if shuffle:
            random.shuffle(self.alltests)

        self.cleanup_dir_list = []
        self.try_again_list = []

        kwargs = {
            'appPath': self.appPath,
            'xrePath': self.xrePath,
            'testingModulesDir': self.testingModulesDir,
            'debuggerInfo': self.debuggerInfo,
            'jsDebuggerInfo': self.jsDebuggerInfo,
            'pluginsPath': self.pluginsPath,
            'httpdManifest': self.httpdManifest,
            'httpdJSPath': self.httpdJSPath,
            'headJSPath': self.headJSPath,
            'tempDir': self.tempDir,
            'testharnessdir': self.testharnessdir,
            'profileName': self.profileName,
            'singleFile': self.singleFile,
            'env': self.env, # making a copy of this in the testthreads
            'symbolsPath': self.symbolsPath,
            'logfiles': self.logfiles,
            'xpcshell': self.xpcshell,
            'xpcsRunArgs': self.xpcsRunArgs,
            'failureManifest': self.failure_manifest,
            'jscovdir': self.jscovdir,
            'harness_timeout': self.harness_timeout,
            'stack_fixer_function': self.stack_fixer_function,
        }

        if self.sequential:
            # Allow user to kill hung xpcshell subprocess with SIGINT
            # when we are only running tests sequentially.
            signal.signal(signal.SIGINT, markGotSIGINT)

        if self.debuggerInfo:
            # Force a sequential run
            self.sequential = True

            # If we have an interactive debugger, disable SIGINT entirely.
            if self.debuggerInfo.interactive:
                signal.signal(signal.SIGINT, lambda signum, frame: None)

            if "lldb" in self.debuggerInfo.path:
                # Ask people to start debugging using 'process launch', see bug 952211.
                self.log.info("It appears that you're using LLDB to debug this test.  " +
                              "Please use the 'process launch' command instead of the 'run' command to start xpcshell.")

        if self.jsDebuggerInfo:
            # The js debugger magic needs more work to do the right thing
            # if debugging multiple files.
            if len(self.alltests) != 1:
                self.log.error("Error: --jsdebugger can only be used with a single test!")
                return False

        # The test itself needs to know whether it is a tsan build, since
        # that has an effect on interpretation of the process return value.
        usingTSan = "tsan" in self.mozInfo and self.mozInfo["tsan"]

        # create a queue of all tests that will run
        tests_queue = deque()
        # also a list for the tests that need to be run sequentially
        sequential_tests = []
        for test_object in self.alltests:
            # Test identifiers are provided for the convenience of logging. These
            # start as path names but are rewritten in case tests from the same path
            # are re-run.

            path = test_object['path']
            test_object['id'] = self.makeTestId(test_object)

            if self.singleFile and not path.endswith(self.singleFile):
                continue

            self.testCount += 1

            test = testClass(test_object, self.event, self.cleanup_dir_list,
                    app_dir_key=appDirKey,
                    interactive=interactive,
                    verbose=verbose or test_object.get("verbose") == "true",
                    pStdout=pStdout, pStderr=pStderr,
                    keep_going=keepGoing, log=self.log, usingTSan=usingTSan,
                    mobileArgs=mobileArgs, **kwargs)
            if 'run-sequentially' in test_object or self.sequential:
                sequential_tests.append(test)
            else:
                tests_queue.append(test)

        if self.sequential:
            self.log.info("Running tests sequentially.")
        else:
            self.log.info("Using at most %d threads." % NUM_THREADS)

        # keep a set of NUM_THREADS running tests and start running the
        # tests in the queue at most NUM_THREADS at a time
        running_tests = set()
        keep_going = True
        exceptions = []
        tracebacks = []
        self.log.suite_start([t['id'] for t in self.alltests])

        while tests_queue or running_tests:
            # if we're not supposed to continue and all of the running tests
            # are done, stop
            if not keep_going and not running_tests:
                break

            # if there's room to run more tests, start running them
            while keep_going and tests_queue and (len(running_tests) < NUM_THREADS):
                test = tests_queue.popleft()
                running_tests.add(test)
                test.start()

            # queue is full (for now) or no more new tests,
            # process the finished tests so far

            # wait for at least one of the tests to finish
            self.event.wait(1)
            self.event.clear()

            # find what tests are done (might be more than 1)
            done_tests = set()
            for test in running_tests:
                if test.done:
                    done_tests.add(test)
                    test.join(1) # join with timeout so we don't hang on blocked threads
                    # if the test had trouble, we will try running it again
                    # at the end of the run
                    if test.retry or test.is_alive():
                        # if the join call timed out, test.is_alive => True
                        self.try_again_list.append(test.test_object)
                        continue
                    # did the test encounter any exception?
                    if test.exception:
                        exceptions.append(test.exception)
                        tracebacks.append(test.traceback)
                        # we won't add any more tests, will just wait for
                        # the currently running ones to finish
                        keep_going = False
                    keep_going = keep_going and test.keep_going
                    self.addTestResults(test)

            # make room for new tests to run
            running_tests.difference_update(done_tests)

        if keep_going:
            # run the other tests sequentially
            for test in sequential_tests:
                if not keep_going:
                    self.log.error("TEST-UNEXPECTED-FAIL | Received SIGINT (control-C), so stopped run. " \
                                   "(Use --keep-going to keep running tests after killing one with SIGINT)")
                    break
                # we don't want to retry these tests
                test.retry = False
                test.start()
                test.join()
                self.addTestResults(test)
                # did the test encounter any exception?
                if test.exception:
                    exceptions.append(test.exception)
                    tracebacks.append(test.traceback)
                    break
                keep_going = test.keep_going

        # retry tests that failed when run in parallel
        if self.try_again_list:
            self.log.info("Retrying tests that failed when run in parallel.")
        for test_object in self.try_again_list:
            test = testClass(test_object, self.event, self.cleanup_dir_list,
                    retry=False,
                    app_dir_key=appDirKey, interactive=interactive,
                    verbose=verbose, pStdout=pStdout, pStderr=pStderr,
                    keep_going=keepGoing, log=self.log, mobileArgs=mobileArgs,
                    **kwargs)
            test.start()
            test.join()
            self.addTestResults(test)
            # did the test encounter any exception?
            if test.exception:
                exceptions.append(test.exception)
                tracebacks.append(test.traceback)
                break
            keep_going = test.keep_going

        # restore default SIGINT behaviour
        signal.signal(signal.SIGINT, signal.SIG_DFL)

        self.shutdownNode()
        # Clean up any slacker directories that might be lying around
        # Some might fail because of windows taking too long to unlock them.
        # We don't do anything if this fails because the test slaves will have
        # their $TEMP dirs cleaned up on reboot anyway.
        for directory in self.cleanup_dir_list:
            try:
                shutil.rmtree(directory)
            except:
                self.log.info("%s could not be cleaned up." % directory)

        if exceptions:
            self.log.info("Following exceptions were raised:")
            for t in tracebacks:
                self.log.error(t)
            raise exceptions[0]

        if self.testCount == 0:
            self.log.error("No tests run. Did you pass an invalid --test-path?")
            self.failCount = 1

        self.log.info("INFO | Result summary:")
        self.log.info("INFO | Passed: %d" % self.passCount)
        self.log.info("INFO | Failed: %d" % self.failCount)
        self.log.info("INFO | Todo: %d" % self.todoCount)
        self.log.info("INFO | Retried: %d" % len(self.try_again_list))

        if gotSIGINT and not keepGoing:
            self.log.error("TEST-UNEXPECTED-FAIL | Received SIGINT (control-C), so stopped run. " \
                           "(Use --keep-going to keep running tests after killing one with SIGINT)")
            return False

        self.log.suite_end()
        return self.failCount == 0


def main():
    parser = parser_desktop()
    options = parser.parse_args()

    log = commandline.setup_logging("XPCShell", options, {"tbpl": sys.stdout})

    if options.xpcshell is None:
        print >> sys.stderr, """Must provide path to xpcshell using --xpcshell"""

    xpcsh = XPCShellTests(log)

    if options.interactive and not options.testPath:
        print >>sys.stderr, "Error: You must specify a test filename in interactive mode!"
        sys.exit(1)

    if not xpcsh.runTests(**vars(options)):
        sys.exit(1)

if __name__ == '__main__':
    main()