scripts/device-crash-test

   1 #!/usr/bin/env python3
   2 #
   3 #  Copyright (c) 2017 Red Hat Inc
   4 #
   5 # Author:
   6 #  Eduardo Habkost <ehabkost@redhat.com>
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 2 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License along
  19 # with this program; if not, write to the Free Software Foundation, Inc.,
  20 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21
  22 """
  23 Run QEMU with all combinations of -machine and -device types,
  24 check for crashes and unexpected errors.
  25 """
  26
  27 import os
  28 import sys
  29 import glob
  30 import logging
  31 import traceback
  32 import re
  33 import random
  34 import argparse
  35 from itertools import chain
  36
  37 sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'python'))
  38 from qemu.machine import QEMUMachine
  39
  40 logger = logging.getLogger('device-crash-test')
  41 dbg = logger.debug
  42
  43
  44 # Purposes of the following whitelist:
  45 # * Avoiding verbose log messages when we find known non-fatal
  46 #   (exitcode=1) errors
  47 # * Avoiding fatal errors when we find known crashes
  48 # * Skipping machines/devices that are known not to work out of
  49 #   the box, when running in --quick mode
  50 #
  51 # Keeping the whitelist updated is desirable, but not required,
  52 # because unexpected cases where QEMU exits with exitcode=1 will
  53 # just trigger a INFO message.
  54
  55 # Valid whitelist entry keys:
  56 # * accel: regexp, full match only
  57 # * machine: regexp, full match only
  58 # * device: regexp, full match only
  59 # * log: regexp, partial match allowed
  60 # * exitcode: if not present, defaults to 1. If None, matches any exitcode
  61 # * warn: if True, matching failures will be logged as warnings
  62 # * expected: if True, QEMU is expected to always fail every time
  63 #   when testing the corresponding test case
  64 # * loglevel: log level of log output when there's a match.
  65 ERROR_WHITELIST = [
  66     # Machines that won't work out of the box:
  67     #             MACHINE                         | ERROR MESSAGE
  68     {'machine':'niagara', 'expected':True},       # Unable to load a firmware for -M niagara
  69     {'machine':'boston', 'expected':True},        # Please provide either a -kernel or -bios argument
  70     {'machine':'leon3_generic', 'expected':True}, # Can't read bios image (null)
  71
  72     # devices that don't work out of the box because they require extra options to "-device DEV":
  73     #            DEVICE                                    | ERROR MESSAGE
  74     {'device':'.*-(i386|x86_64)-cpu', 'expected':True},    # CPU socket-id is not set
  75     {'device':'icp', 'expected':True},                     # icp_realize: required link 'xics' not found: Property '.xics' not found
  76     {'device':'ics', 'expected':True},                     # ics_base_realize: required link 'xics' not found: Property '.xics' not found
  77     # "-device ide-cd" does work on more recent QEMU versions, so it doesn't have expected=True
  78     {'device':'ide-cd'},                                 # No drive specified
  79     {'device':'ide-drive', 'expected':True},               # No drive specified
  80     {'device':'ide-hd', 'expected':True},                  # No drive specified
  81     {'device':'ipmi-bmc-extern', 'expected':True},         # IPMI external bmc requires chardev attribute
  82     {'device':'isa-debugcon', 'expected':True},            # Can't create serial device, empty char device
  83     {'device':'isa-ipmi-bt', 'expected':True},             # IPMI device requires a bmc attribute to be set
  84     {'device':'isa-ipmi-kcs', 'expected':True},            # IPMI device requires a bmc attribute to be set
  85     {'device':'isa-parallel', 'expected':True},            # Can't create serial device, empty char device
  86     {'device':'ivshmem-doorbell', 'expected':True},        # You must specify a 'chardev'
  87     {'device':'ivshmem-plain', 'expected':True},           # You must specify a 'memdev'
  88     {'device':'loader', 'expected':True},                  # please include valid arguments
  89     {'device':'nand', 'expected':True},                    # Unsupported NAND block size 0x1
  90     {'device':'nvdimm', 'expected':True},                  # 'memdev' property is not set
  91     {'device':'nvme', 'expected':True},                    # Device initialization failed
  92     {'device':'pc-dimm', 'expected':True},                 # 'memdev' property is not set
  93     {'device':'pci-bridge', 'expected':True},              # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
  94     {'device':'pci-bridge-seat', 'expected':True},         # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
  95     {'device':'pxb', 'expected':True},                     # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
  96     {'device':'scsi-block', 'expected':True},              # drive property not set
  97     {'device':'scsi-disk', 'expected':True},               # drive property not set
  98     {'device':'scsi-generic', 'expected':True},            # drive property not set
  99     {'device':'scsi-hd', 'expected':True},                 # drive property not set
 100     {'device':'spapr-pci-host-bridge', 'expected':True},   # BUID not specified for PHB
 101     {'device':'spapr-rng', 'expected':True},               # spapr-rng needs an RNG backend!
 102     {'device':'spapr-vty', 'expected':True},               # chardev property not set
 103     {'device':'tpm-tis', 'expected':True},                 # tpm_tis: backend driver with id (null) could not be found
 104     {'device':'unimplemented-device', 'expected':True},    # property 'size' not specified or zero
 105     {'device':'usb-braille', 'expected':True},             # Property chardev is required
 106     {'device':'usb-mtp', 'expected':True},                 # rootdir property must be configured
 107     {'device':'usb-redir', 'expected':True},               # Parameter 'chardev' is missing
 108     {'device':'usb-serial', 'expected':True},              # Property chardev is required
 109     {'device':'usb-storage', 'expected':True},             # drive property not set
 110     {'device':'vfio-amd-xgbe', 'expected':True},           # -device vfio-amd-xgbe: vfio error: wrong host device name
 111     {'device':'vfio-calxeda-xgmac', 'expected':True},      # -device vfio-calxeda-xgmac: vfio error: wrong host device name
 112     {'device':'vfio-pci', 'expected':True},                # No provided host device
 113     {'device':'vfio-pci-igd-lpc-bridge', 'expected':True}, # VFIO dummy ISA/LPC bridge must have address 1f.0
 114     {'device':'vhost-scsi.*', 'expected':True},            # vhost-scsi: missing wwpn
 115     {'device':'vhost-vsock-device', 'expected':True},      # guest-cid property must be greater than 2
 116     {'device':'vhost-vsock-pci', 'expected':True},         # guest-cid property must be greater than 2
 117     {'device':'virtio-9p-ccw', 'expected':True},           # 9pfs device couldn't find fsdev with the id = NULL
 118     {'device':'virtio-9p-device', 'expected':True},        # 9pfs device couldn't find fsdev with the id = NULL
 119     {'device':'virtio-9p-pci', 'expected':True},           # 9pfs device couldn't find fsdev with the id = NULL
 120     {'device':'virtio-blk-ccw', 'expected':True},          # drive property not set
 121     {'device':'virtio-blk-device', 'expected':True},       # drive property not set
 122     {'device':'virtio-blk-device', 'expected':True},       # drive property not set
 123     {'device':'virtio-blk-pci', 'expected':True},          # drive property not set
 124     {'device':'virtio-crypto-ccw', 'expected':True},       # 'cryptodev' parameter expects a valid object
 125     {'device':'virtio-crypto-device', 'expected':True},    # 'cryptodev' parameter expects a valid object
 126     {'device':'virtio-crypto-pci', 'expected':True},       # 'cryptodev' parameter expects a valid object
 127     {'device':'virtio-input-host-device', 'expected':True}, # evdev property is required
 128     {'device':'virtio-input-host-pci', 'expected':True},   # evdev property is required
 129     {'device':'xen-pvdevice', 'expected':True},            # Device ID invalid, it must always be supplied
 130     {'device':'vhost-vsock-ccw', 'expected':True},         # guest-cid property must be greater than 2
 131     {'device':'zpci', 'expected':True},                    # target must be defined
 132     {'device':'pnv-(occ|icp|lpc)', 'expected':True},       # required link 'xics' not found: Property '.xics' not found
 133     {'device':'powernv-cpu-.*', 'expected':True},          # pnv_core_realize: required link 'xics' not found: Property '.xics' not found
 134
 135     # ioapic devices are already created by pc and will fail:
 136     {'machine':'q35|pc.*', 'device':'kvm-ioapic', 'expected':True}, # Only 1 ioapics allowed
 137     {'machine':'q35|pc.*', 'device':'ioapic', 'expected':True},     # Only 1 ioapics allowed
 138
 139     # "spapr-cpu-core needs a pseries machine"
 140     {'machine':'(?!pseries).*', 'device':'.*-spapr-cpu-core', 'expected':True},
 141
 142     # KVM-specific devices shouldn't be tried without accel=kvm:
 143     {'accel':'(?!kvm).*', 'device':'kvmclock', 'expected':True},
 144
 145     # xen-specific machines and devices:
 146     {'accel':'(?!xen).*', 'machine':'xen.*', 'expected':True},
 147     {'accel':'(?!xen).*', 'device':'xen-.*', 'expected':True},
 148
 149     # this fails on some machine-types, but not all, so they don't have expected=True:
 150     {'device':'vmgenid'}, # vmgenid requires DMA write support in fw_cfg, which this machine type does not provide
 151
 152     # Silence INFO messages for errors that are common on multiple
 153     # devices/machines:
 154     {'log':r"No '[\w-]+' bus found for device '[\w-]+'"},
 155     {'log':r"images* must be given with the 'pflash' parameter"},
 156     {'log':r"(Guest|ROM|Flash|Kernel) image must be specified"},
 157     {'log':r"[cC]ould not load [\w ]+ (BIOS|bios) '[\w-]+\.bin'"},
 158     {'log':r"Couldn't find rom image '[\w-]+\.bin'"},
 159     {'log':r"speed mismatch trying to attach usb device"},
 160     {'log':r"Can't create a second ISA bus"},
 161     {'log':r"duplicate fw_cfg file name"},
 162     # sysbus-related error messages: most machines reject most dynamic sysbus devices:
 163     {'log':r"Option '-device [\w.,-]+' cannot be handled by this machine"},
 164     {'log':r"Device [\w.,-]+ is not supported by this machine yet"},
 165     {'log':r"Device [\w.,-]+ can not be dynamically instantiated"},
 166     {'log':r"Platform Bus: Can not fit MMIO region of size "},
 167     # other more specific errors we will ignore:
 168     {'device':'.*-spapr-cpu-core', 'log':r"CPU core type should be"},
 169     {'log':r"MSI(-X)? is not supported by interrupt controller"},
 170     {'log':r"pxb-pcie? devices cannot reside on a PCIe? bus"},
 171     {'log':r"Ignoring smp_cpus value"},
 172     {'log':r"sd_init failed: Drive 'sd0' is already in use because it has been automatically connected to another device"},
 173     {'log':r"This CPU requires a smaller page size than the system is using"},
 174     {'log':r"MSI-X support is mandatory in the S390 architecture"},
 175     {'log':r"rom check and register reset failed"},
 176     {'log':r"Unable to initialize GIC, CPUState for CPU#0 not valid"},
 177     {'log':r"Multiple VT220 operator consoles are not supported"},
 178     {'log':r"core 0 already populated"},
 179     {'log':r"could not find stage1 bootloader"},
 180
 181     # other exitcode=1 failures not listed above will just generate INFO messages:
 182     {'exitcode':1, 'loglevel':logging.INFO},
 183
 184     # everything else (including SIGABRT and SIGSEGV) will be a fatal error:
 185     {'exitcode':None, 'fatal':True, 'loglevel':logging.FATAL},
 186 ]
 187
 188
 189 def whitelistTestCaseMatch(wl, t):
 190     """Check if a test case specification can match a whitelist entry
 191
 192     This only checks if a whitelist entry is a candidate match
 193     for a given test case, it won't check if the test case
 194     results/output match the entry.  See whitelistResultMatch().
 195     """
 196     return (('machine' not in wl or
 197              'machine' not in t or
 198              re.match(wl['machine'] + '$', t['machine'])) and
 199             ('accel' not in wl or
 200              'accel' not in t or
 201              re.match(wl['accel'] + '$', t['accel'])) and
 202             ('device' not in wl or
 203              'device' not in t or
 204              re.match(wl['device'] + '$', t['device'])))
 205
 206
 207 def whitelistCandidates(t):
 208     """Generate the list of candidates that can match a test case"""
 209     for i, wl in enumerate(ERROR_WHITELIST):
 210         if whitelistTestCaseMatch(wl, t):
 211             yield (i, wl)
 212
 213
 214 def findExpectedResult(t):
 215     """Check if there's an expected=True whitelist entry for a test case
 216
 217     Returns (i, wl) tuple, where i is the index in
 218     ERROR_WHITELIST and wl is the whitelist entry itself.
 219     """
 220     for i, wl in whitelistCandidates(t):
 221         if wl.get('expected'):
 222             return (i, wl)
 223
 224
 225 def whitelistResultMatch(wl, r):
 226     """Check if test case results/output match a whitelist entry
 227
 228     It is valid to call this function only if
 229     whitelistTestCaseMatch() is True for the entry (e.g. on
 230     entries returned by whitelistCandidates())
 231     """
 232     assert whitelistTestCaseMatch(wl, r['testcase'])
 233     return ((wl.get('exitcode', 1) is None or
 234              r['exitcode'] == wl.get('exitcode', 1)) and
 235             ('log' not in wl or
 236              re.search(wl['log'], r['log'], re.MULTILINE)))
 237
 238
 239 def checkResultWhitelist(r):
 240     """Look up whitelist entry for a given test case result
 241
 242     Returns (i, wl) tuple, where i is the index in
 243     ERROR_WHITELIST and wl is the whitelist entry itself.
 244     """
 245     for i, wl in whitelistCandidates(r['testcase']):
 246         if whitelistResultMatch(wl, r):
 247             return i, wl
 248
 249     raise Exception("this should never happen")
 250
 251
 252 def qemuOptsEscape(s):
 253     """Escape option value QemuOpts"""
 254     return s.replace(",", ",,")
 255
 256
 257 def formatTestCase(t):
 258     """Format test case info as "key=value key=value" for prettier logging output"""
 259     return ' '.join('%s=%s' % (k, v) for k, v in t.items())
 260
 261
 262 def qomListTypeNames(vm, **kwargs):
 263     """Run qom-list-types QMP command, return type names"""
 264     types = vm.command('qom-list-types', **kwargs)
 265     return [t['name'] for t in types]
 266
 267
 268 def infoQDM(vm):
 269     """Parse 'info qdm' output"""
 270     args = {'command-line': 'info qdm'}
 271     devhelp = vm.command('human-monitor-command', **args)
 272     for l in devhelp.split('\n'):
 273         l = l.strip()
 274         if l == '' or l.endswith(':'):
 275             continue
 276         d = {'name': re.search(r'name "([^"]+)"', l).group(1),
 277              'no-user': (re.search(', no-user', l) is not None)}
 278         yield d
 279
 280
 281 class QemuBinaryInfo(object):
 282     def __init__(self, binary, devtype):
 283         if devtype is None:
 284             devtype = 'device'
 285
 286         self.binary = binary
 287         self._machine_info = {}
 288
 289         dbg("devtype: %r", devtype)
 290         args = ['-S', '-machine', 'none,accel=kvm:tcg']
 291         dbg("querying info for QEMU binary: %s", binary)
 292         vm = QEMUMachine(binary=binary, args=args)
 293         vm.launch()
 294         try:
 295             self.alldevs = set(qomListTypeNames(vm, implements=devtype, abstract=False))
 296             # there's no way to query DeviceClass::user_creatable using QMP,
 297             # so use 'info qdm':
 298             self.no_user_devs = set([d['name'] for d in infoQDM(vm, ) if d['no-user']])
 299             self.machines = list(m['name'] for m in vm.command('query-machines'))
 300             self.user_devs = self.alldevs.difference(self.no_user_devs)
 301             self.kvm_available = vm.command('query-kvm')['enabled']
 302         finally:
 303             vm.shutdown()
 304
 305     def machineInfo(self, machine):
 306         """Query for information on a specific machine-type
 307
 308         Results are cached internally, in case the same machine-
 309         type is queried multiple times.
 310         """
 311         if machine in self._machine_info:
 312             return self._machine_info[machine]
 313
 314         mi = {}
 315         args = ['-S', '-machine', '%s' % (machine)]
 316         dbg("querying machine info for binary=%s machine=%s", self.binary, machine)
 317         vm = QEMUMachine(binary=self.binary, args=args)
 318         try:
 319             vm.launch()
 320             mi['runnable'] = True
 321         except KeyboardInterrupt:
 322             raise
 323         except:
 324             dbg("exception trying to run binary=%s machine=%s", self.binary, machine, exc_info=sys.exc_info())
 325             dbg("log: %r", vm.get_log())
 326             mi['runnable'] = False
 327
 328         vm.shutdown()
 329         self._machine_info[machine] = mi
 330         return mi
 331
 332
 333 BINARY_INFO = {}
 334
 335
 336 def getBinaryInfo(args, binary):
 337     if binary not in BINARY_INFO:
 338         BINARY_INFO[binary] = QemuBinaryInfo(binary, args.devtype)
 339     return BINARY_INFO[binary]
 340
 341
 342 def checkOneCase(args, testcase):
 343     """Check one specific case
 344
 345     Returns a dictionary containing failure information on error,
 346     or None on success
 347     """
 348     binary = testcase['binary']
 349     accel = testcase['accel']
 350     machine = testcase['machine']
 351     device = testcase['device']
 352
 353     dbg("will test: %r", testcase)
 354
 355     args = ['-S', '-machine', '%s,accel=%s' % (machine, accel),
 356             '-device', qemuOptsEscape(device)]
 357     cmdline = ' '.join([binary] + args)
 358     dbg("will launch QEMU: %s", cmdline)
 359     vm = QEMUMachine(binary=binary, args=args)
 360
 361     exc_traceback = None
 362     try:
 363         vm.launch()
 364     except KeyboardInterrupt:
 365         raise
 366     except:
 367         exc_traceback = traceback.format_exc()
 368         dbg("Exception while running test case")
 369     finally:
 370         vm.shutdown()
 371         ec = vm.exitcode()
 372         log = vm.get_log()
 373
 374     if exc_traceback is not None or ec != 0:
 375         return {'exc_traceback':exc_traceback,
 376                 'exitcode':ec,
 377                 'log':log,
 378                 'testcase':testcase,
 379                 'cmdline':cmdline}
 380
 381
 382 def binariesToTest(args, testcase):
 383     if args.qemu:
 384         r = args.qemu
 385     else:
 386         r = [f.path for f in os.scandir('.')
 387              if f.name.startswith('qemu-system-') and
 388                 f.is_file() and os.access(f, os.X_OK)]
 389     return r
 390
 391
 392 def accelsToTest(args, testcase):
 393     if getBinaryInfo(args, testcase['binary']).kvm_available:
 394         yield 'kvm'
 395     yield 'tcg'
 396
 397
 398 def machinesToTest(args, testcase):
 399     return getBinaryInfo(args, testcase['binary']).machines
 400
 401
 402 def devicesToTest(args, testcase):
 403     return getBinaryInfo(args, testcase['binary']).user_devs
 404
 405
 406 TESTCASE_VARIABLES = [
 407     ('binary', binariesToTest),
 408     ('accel', accelsToTest),
 409     ('machine', machinesToTest),
 410     ('device', devicesToTest),
 411 ]
 412
 413
 414 def genCases1(args, testcases, var, fn):
 415     """Generate new testcases for one variable
 416
 417     If an existing item already has a variable set, don't
 418     generate new items and just return it directly. This
 419     allows the "-t" command-line option to be used to choose
 420     a specific test case.
 421     """
 422     for testcase in testcases:
 423         if var in testcase:
 424             yield testcase.copy()
 425         else:
 426             for i in fn(args, testcase):
 427                 t = testcase.copy()
 428                 t[var] = i
 429                 yield t
 430
 431
 432 def genCases(args, testcase):
 433     """Generate test cases for all variables
 434     """
 435     cases = [testcase.copy()]
 436     for var, fn in TESTCASE_VARIABLES:
 437         dbg("var: %r, fn: %r", var, fn)
 438         cases = genCases1(args, cases, var, fn)
 439     return cases
 440
 441
 442 def casesToTest(args, testcase):
 443     cases = genCases(args, testcase)
 444     if args.random:
 445         cases = list(cases)
 446         cases = random.sample(cases, min(args.random, len(cases)))
 447     if args.debug:
 448         cases = list(cases)
 449         dbg("%d test cases to test", len(cases))
 450     if args.shuffle:
 451         cases = list(cases)
 452         random.shuffle(cases)
 453     return cases
 454
 455
 456 def logFailure(f, level):
 457     t = f['testcase']
 458     logger.log(level, "failed: %s", formatTestCase(t))
 459     logger.log(level, "cmdline: %s", f['cmdline'])
 460     for l in f['log'].strip().split('\n'):
 461         logger.log(level, "log: %s", l)
 462     logger.log(level, "exit code: %r", f['exitcode'])
 463     if f['exc_traceback']:
 464         logger.log(level, "exception:")
 465         for l in f['exc_traceback'].split('\n'):
 466             logger.log(level, "  %s", l.rstrip('\n'))
 467
 468
 469 def main():
 470     parser = argparse.ArgumentParser(description="QEMU -device crash test")
 471     parser.add_argument('-t', metavar='KEY=VALUE', nargs='*',
 472                         help="Limit test cases to KEY=VALUE",
 473                         action='append', dest='testcases', default=[])
 474     parser.add_argument('-d', '--debug', action='store_true',
 475                         help='debug output')
 476     parser.add_argument('-v', '--verbose', action='store_true', default=True,
 477                         help='verbose output')
 478     parser.add_argument('-q', '--quiet', dest='verbose', action='store_false',
 479                         help='non-verbose output')
 480     parser.add_argument('-r', '--random', type=int, metavar='COUNT',
 481                         help='run a random sample of COUNT test cases',
 482                         default=0)
 483     parser.add_argument('--shuffle', action='store_true',
 484                         help='Run test cases in random order')
 485     parser.add_argument('--dry-run', action='store_true',
 486                         help="Don't run any tests, just generate list")
 487     parser.add_argument('-D', '--devtype', metavar='TYPE',
 488                         help="Test only device types that implement TYPE")
 489     parser.add_argument('-Q', '--quick', action='store_true', default=True,
 490                         help="Quick mode: skip test cases that are expected to fail")
 491     parser.add_argument('-F', '--full', action='store_false', dest='quick',
 492                         help="Full mode: test cases that are expected to fail")
 493     parser.add_argument('--strict', action='store_true', dest='strict',
 494                         help="Treat all warnings as fatal")
 495     parser.add_argument('qemu', nargs='*', metavar='QEMU',
 496                         help='QEMU binary to run')
 497     args = parser.parse_args()
 498
 499     if args.debug:
 500         lvl = logging.DEBUG
 501     elif args.verbose:
 502         lvl = logging.INFO
 503     else:
 504         lvl = logging.WARN
 505     logging.basicConfig(stream=sys.stdout, level=lvl, format='%(levelname)s: %(message)s')
 506
 507     fatal_failures = []
 508     wl_stats = {}
 509     skipped = 0
 510     total = 0
 511
 512     tc = {}
 513     dbg("testcases: %r", args.testcases)
 514     if args.testcases:
 515         for t in chain(*args.testcases):
 516             for kv in t.split():
 517                 k, v = kv.split('=', 1)
 518                 tc[k] = v
 519
 520     if len(binariesToTest(args, tc)) == 0:
 521         print("No QEMU binary found", file=sys.stderr)
 522         parser.print_usage(sys.stderr)
 523         return 1
 524
 525     for t in casesToTest(args, tc):
 526         logger.info("running test case: %s", formatTestCase(t))
 527         total += 1
 528
 529         expected_match = findExpectedResult(t)
 530         if (args.quick and
 531                 (expected_match or
 532                  not getBinaryInfo(args, t['binary']).machineInfo(t['machine'])['runnable'])):
 533             dbg("skipped: %s", formatTestCase(t))
 534             skipped += 1
 535             continue
 536
 537         if args.dry_run:
 538             continue
 539
 540         try:
 541             f = checkOneCase(args, t)
 542         except KeyboardInterrupt:
 543             break
 544
 545         if f:
 546             i, wl = checkResultWhitelist(f)
 547             dbg("testcase: %r, whitelist match: %r", t, wl)
 548             wl_stats.setdefault(i, []).append(f)
 549             level = wl.get('loglevel', logging.DEBUG)
 550             logFailure(f, level)
 551             if wl.get('fatal') or (args.strict and level >= logging.WARN):
 552                 fatal_failures.append(f)
 553         else:
 554             dbg("success: %s", formatTestCase(t))
 555             if expected_match:
 556                 logger.warn("Didn't fail as expected: %s", formatTestCase(t))
 557
 558     logger.info("Total: %d test cases", total)
 559     if skipped:
 560         logger.info("Skipped %d test cases", skipped)
 561
 562     if args.debug:
 563         stats = sorted([(len(wl_stats.get(i, [])), wl) for i, wl in
 564                          enumerate(ERROR_WHITELIST)], key=lambda x: x[0])
 565         for count, wl in stats:
 566             dbg("whitelist entry stats: %d: %r", count, wl)
 567
 568     if fatal_failures:
 569         for f in fatal_failures:
 570             t = f['testcase']
 571             logger.error("Fatal failure: %s", formatTestCase(t))
 572         logger.error("Fatal failures on some machine/device combinations")
 573         return 1
 574
 575 if __name__ == '__main__':
 576     sys.exit(main())