qemu/scripts/device-crash-test
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   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"""
  23Run QEMU with all combinations of -machine and -device types,
  24check for crashes and unexpected errors.
  25"""
  26
  27import os
  28import sys
  29import glob
  30import logging
  31import traceback
  32import re
  33import random
  34import argparse
  35from itertools import chain
  36
  37sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'python'))
  38from qemu.machine import QEMUMachine
  39from qemu.aqmp import ConnectError
  40
  41logger = logging.getLogger('device-crash-test')
  42dbg = logger.debug
  43
  44
  45# Purposes of the following rule list:
  46# * Avoiding verbose log messages when we find known non-fatal
  47#   (exitcode=1) errors
  48# * Avoiding fatal errors when we find known crashes
  49# * Skipping machines/devices that are known not to work out of
  50#   the box, when running in --quick mode
  51#
  52# Keeping the rule list updated is desirable, but not required,
  53# because unexpected cases where QEMU exits with exitcode=1 will
  54# just trigger a INFO message.
  55
  56# Valid error rule keys:
  57# * accel: regexp, full match only
  58# * machine: regexp, full match only
  59# * device: regexp, full match only
  60# * log: regexp, partial match allowed
  61# * exitcode: if not present, defaults to 1. If None, matches any exitcode
  62# * warn: if True, matching failures will be logged as warnings
  63# * expected: if True, QEMU is expected to always fail every time
  64#   when testing the corresponding test case
  65# * loglevel: log level of log output when there's a match.
  66ERROR_RULE_LIST = [
  67    # Machines that won't work out of the box:
  68    #             MACHINE                         | ERROR MESSAGE
  69    {'machine':'niagara', 'expected':True},       # Unable to load a firmware for -M niagara
  70    {'machine':'boston', 'expected':True},        # Please provide either a -kernel or -bios argument
  71    {'machine':'leon3_generic', 'expected':True}, # Can't read bios image (null)
  72
  73    # devices that don't work out of the box because they require extra options to "-device DEV":
  74    #            DEVICE                                    | ERROR MESSAGE
  75    {'device':'.*-(i386|x86_64)-cpu', 'expected':True},    # CPU socket-id is not set
  76    {'device':'icp', 'expected':True},                     # icp_realize: required link 'xics' not found: Property '.xics' not found
  77    {'device':'ics', 'expected':True},                     # ics_base_realize: required link 'xics' not found: Property '.xics' not found
  78    # "-device ide-cd" does work on more recent QEMU versions, so it doesn't have expected=True
  79    {'device':'ide-cd'},                                 # 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-generic', 'expected':True},            # drive property not set
  98    {'device':'scsi-hd', 'expected':True},                 # drive property not set
  99    {'device':'spapr-pci-host-bridge', 'expected':True},   # BUID not specified for PHB
 100    {'device':'spapr-rng', 'expected':True},               # spapr-rng needs an RNG backend!
 101    {'device':'spapr-vty', 'expected':True},               # chardev property not set
 102    {'device':'tpm-tis', 'expected':True},                 # tpm_tis: backend driver with id (null) could not be found
 103    {'device':'unimplemented-device', 'expected':True},    # property 'size' not specified or zero
 104    {'device':'usb-braille', 'expected':True},             # Property chardev is required
 105    {'device':'usb-mtp', 'expected':True},                 # rootdir property must be configured
 106    {'device':'usb-redir', 'expected':True},               # Parameter 'chardev' is missing
 107    {'device':'usb-serial', 'expected':True},              # Property chardev is required
 108    {'device':'usb-storage', 'expected':True},             # drive property not set
 109    {'device':'vfio-amd-xgbe', 'expected':True},           # -device vfio-amd-xgbe: vfio error: wrong host device name
 110    {'device':'vfio-calxeda-xgmac', 'expected':True},      # -device vfio-calxeda-xgmac: vfio error: wrong host device name
 111    {'device':'vfio-pci', 'expected':True},                # No provided host device
 112    {'device':'vfio-pci-igd-lpc-bridge', 'expected':True}, # VFIO dummy ISA/LPC bridge must have address 1f.0
 113    {'device':'vhost-scsi.*', 'expected':True},            # vhost-scsi: missing wwpn
 114    {'device':'vhost-vsock-device', 'expected':True},      # guest-cid property must be greater than 2
 115    {'device':'vhost-vsock-pci', 'expected':True},         # guest-cid property must be greater than 2
 116    {'device':'virtio-9p-ccw', 'expected':True},           # 9pfs device couldn't find fsdev with the id = NULL
 117    {'device':'virtio-9p-device', 'expected':True},        # 9pfs device couldn't find fsdev with the id = NULL
 118    {'device':'virtio-9p-pci', 'expected':True},           # 9pfs device couldn't find fsdev with the id = NULL
 119    {'device':'virtio-blk-ccw', 'expected':True},          # drive property not set
 120    {'device':'virtio-blk-device', 'expected':True},       # drive property not set
 121    {'device':'virtio-blk-device', 'expected':True},       # drive property not set
 122    {'device':'virtio-blk-pci', 'expected':True},          # drive property not set
 123    {'device':'virtio-crypto-ccw', 'expected':True},       # 'cryptodev' parameter expects a valid object
 124    {'device':'virtio-crypto-device', 'expected':True},    # 'cryptodev' parameter expects a valid object
 125    {'device':'virtio-crypto-pci', 'expected':True},       # 'cryptodev' parameter expects a valid object
 126    {'device':'virtio-input-host-device', 'expected':True}, # evdev property is required
 127    {'device':'virtio-input-host-pci', 'expected':True},   # evdev property is required
 128    {'device':'xen-pvdevice', 'expected':True},            # Device ID invalid, it must always be supplied
 129    {'device':'vhost-vsock-ccw', 'expected':True},         # guest-cid property must be greater than 2
 130    {'device':'zpci', 'expected':True},                    # target must be defined
 131    {'device':'pnv-(occ|icp|lpc)', 'expected':True},       # required link 'xics' not found: Property '.xics' not found
 132    {'device':'powernv-cpu-.*', 'expected':True},          # pnv_core_realize: required link 'xics' not found: Property '.xics' not found
 133
 134    # ioapic devices are already created by pc and will fail:
 135    {'machine':'q35|pc.*', 'device':'kvm-ioapic', 'expected':True}, # Only 1 ioapics allowed
 136    {'machine':'q35|pc.*', 'device':'ioapic', 'expected':True},     # Only 1 ioapics allowed
 137
 138    # "spapr-cpu-core needs a pseries machine"
 139    {'machine':'(?!pseries).*', 'device':'.*-spapr-cpu-core', 'expected':True},
 140
 141    # KVM-specific devices shouldn't be tried without accel=kvm:
 142    {'accel':'(?!kvm).*', 'device':'kvmclock', 'expected':True},
 143
 144    # xen-specific machines and devices:
 145    {'accel':'(?!xen).*', 'machine':'xen.*', 'expected':True},
 146    {'accel':'(?!xen).*', 'device':'xen-.*', 'expected':True},
 147
 148    # this fails on some machine-types, but not all, so they don't have expected=True:
 149    {'device':'vmgenid'}, # vmgenid requires DMA write support in fw_cfg, which this machine type does not provide
 150
 151    # Silence INFO messages for errors that are common on multiple
 152    # devices/machines:
 153    {'log':r"No '[\w-]+' bus found for device '[\w-]+'"},
 154    {'log':r"images* must be given with the 'pflash' parameter"},
 155    {'log':r"(Guest|ROM|Flash|Kernel) image must be specified"},
 156    {'log':r"[cC]ould not load [\w ]+ (BIOS|bios) '[\w-]+\.bin'"},
 157    {'log':r"Couldn't find rom image '[\w-]+\.bin'"},
 158    {'log':r"speed mismatch trying to attach usb device"},
 159    {'log':r"Can't create a second ISA bus"},
 160    {'log':r"duplicate fw_cfg file name"},
 161    # sysbus-related error messages: most machines reject most dynamic sysbus devices:
 162    {'log':r"Option '-device [\w.,-]+' cannot be handled by this machine"},
 163    {'log':r"Device [\w.,-]+ is not supported by this machine yet"},
 164    {'log':r"Device [\w.,-]+ can not be dynamically instantiated"},
 165    {'log':r"Platform Bus: Can not fit MMIO region of size "},
 166    # other more specific errors we will ignore:
 167    {'device':'.*-spapr-cpu-core', 'log':r"CPU core type should be"},
 168    {'log':r"MSI(-X)? is not supported by interrupt controller"},
 169    {'log':r"pxb-pcie? devices cannot reside on a PCIe? bus"},
 170    {'log':r"Ignoring smp_cpus value"},
 171    {'log':r"sd_init failed: Drive 'sd0' is already in use because it has been automatically connected to another device"},
 172    {'log':r"This CPU requires a smaller page size than the system is using"},
 173    {'log':r"MSI-X support is mandatory in the S390 architecture"},
 174    {'log':r"rom check and register reset failed"},
 175    {'log':r"Unable to initialize GIC, CPUState for CPU#0 not valid"},
 176    {'log':r"Multiple VT220 operator consoles are not supported"},
 177    {'log':r"core 0 already populated"},
 178    {'log':r"could not find stage1 bootloader"},
 179
 180    # other exitcode=1 failures not listed above will just generate INFO messages:
 181    {'exitcode':1, 'loglevel':logging.INFO},
 182
 183    # everything else (including SIGABRT and SIGSEGV) will be a fatal error:
 184    {'exitcode':None, 'fatal':True, 'loglevel':logging.FATAL},
 185]
 186
 187
 188def errorRuleTestCaseMatch(rule, t):
 189    """Check if a test case specification can match a error rule
 190
 191    This only checks if a error rule is a candidate match
 192    for a given test case, it won't check if the test case
 193    results/output match the rule.  See ruleListResultMatch().
 194    """
 195    return (('machine' not in rule or
 196             'machine' not in t or
 197             re.match(rule['machine'] + '$', t['machine'])) and
 198            ('accel' not in rule or
 199             'accel' not in t or
 200             re.match(rule['accel'] + '$', t['accel'])) and
 201            ('device' not in rule or
 202             'device' not in t or
 203             re.match(rule['device'] + '$', t['device'])))
 204
 205
 206def ruleListCandidates(t):
 207    """Generate the list of candidates that can match a test case"""
 208    for i, rule in enumerate(ERROR_RULE_LIST):
 209        if errorRuleTestCaseMatch(rule, t):
 210            yield (i, rule)
 211
 212
 213def findExpectedResult(t):
 214    """Check if there's an expected=True error rule for a test case
 215
 216    Returns (i, rule) tuple, where i is the index in
 217    ERROR_RULE_LIST and rule is the error rule itself.
 218    """
 219    for i, rule in ruleListCandidates(t):
 220        if rule.get('expected'):
 221            return (i, rule)
 222
 223
 224def ruleListResultMatch(rule, r):
 225    """Check if test case results/output match a error rule
 226
 227    It is valid to call this function only if
 228    errorRuleTestCaseMatch() is True for the rule (e.g. on
 229    rules returned by ruleListCandidates())
 230    """
 231    assert errorRuleTestCaseMatch(rule, r['testcase'])
 232    return ((rule.get('exitcode', 1) is None or
 233             r['exitcode'] == rule.get('exitcode', 1)) and
 234            ('log' not in rule or
 235             re.search(rule['log'], r['log'], re.MULTILINE)))
 236
 237
 238def checkResultRuleList(r):
 239    """Look up error rule for a given test case result
 240
 241    Returns (i, rule) tuple, where i is the index in
 242    ERROR_RULE_LIST and rule is the error rule itself.
 243    """
 244    for i, rule in ruleListCandidates(r['testcase']):
 245        if ruleListResultMatch(rule, r):
 246            return i, rule
 247
 248    raise Exception("this should never happen")
 249
 250
 251def qemuOptsEscape(s):
 252    """Escape option value QemuOpts"""
 253    return s.replace(",", ",,")
 254
 255
 256def formatTestCase(t):
 257    """Format test case info as "key=value key=value" for prettier logging output"""
 258    return ' '.join('%s=%s' % (k, v) for k, v in t.items())
 259
 260
 261def qomListTypeNames(vm, **kwargs):
 262    """Run qom-list-types QMP command, return type names"""
 263    types = vm.command('qom-list-types', **kwargs)
 264    return [t['name'] for t in types]
 265
 266
 267def infoQDM(vm):
 268    """Parse 'info qdm' output"""
 269    args = {'command-line': 'info qdm'}
 270    devhelp = vm.command('human-monitor-command', **args)
 271    for l in devhelp.split('\n'):
 272        l = l.strip()
 273        if l == '' or l.endswith(':'):
 274            continue
 275        d = {'name': re.search(r'name "([^"]+)"', l).group(1),
 276             'no-user': (re.search(', no-user', l) is not None)}
 277        yield d
 278
 279
 280class QemuBinaryInfo(object):
 281    def __init__(self, binary, devtype):
 282        if devtype is None:
 283            devtype = 'device'
 284
 285        self.binary = binary
 286        self._machine_info = {}
 287
 288        dbg("devtype: %r", devtype)
 289        args = ['-S', '-machine', 'none,accel=kvm:tcg']
 290        dbg("querying info for QEMU binary: %s", binary)
 291        vm = QEMUMachine(binary=binary, args=args)
 292        vm.launch()
 293        try:
 294            self.alldevs = set(qomListTypeNames(vm, implements=devtype, abstract=False))
 295            # there's no way to query DeviceClass::user_creatable using QMP,
 296            # so use 'info qdm':
 297            self.no_user_devs = set([d['name'] for d in infoQDM(vm, ) if d['no-user']])
 298            self.machines = list(m['name'] for m in vm.command('query-machines'))
 299            self.user_devs = self.alldevs.difference(self.no_user_devs)
 300            self.kvm_available = vm.command('query-kvm')['enabled']
 301        finally:
 302            vm.shutdown()
 303
 304    def machineInfo(self, machine):
 305        """Query for information on a specific machine-type
 306
 307        Results are cached internally, in case the same machine-
 308        type is queried multiple times.
 309        """
 310        if machine in self._machine_info:
 311            return self._machine_info[machine]
 312
 313        mi = {}
 314        args = ['-S', '-machine', '%s' % (machine)]
 315        dbg("querying machine info for binary=%s machine=%s", self.binary, machine)
 316        vm = QEMUMachine(binary=self.binary, args=args)
 317        try:
 318            vm.launch()
 319            mi['runnable'] = True
 320        except Exception:
 321            dbg("exception trying to run binary=%s machine=%s", self.binary, machine, exc_info=sys.exc_info())
 322            dbg("log: %r", vm.get_log())
 323            mi['runnable'] = False
 324
 325        vm.shutdown()
 326        self._machine_info[machine] = mi
 327        return mi
 328
 329
 330BINARY_INFO = {}
 331
 332
 333def getBinaryInfo(args, binary):
 334    if binary not in BINARY_INFO:
 335        BINARY_INFO[binary] = QemuBinaryInfo(binary, args.devtype)
 336    return BINARY_INFO[binary]
 337
 338
 339def checkOneCase(args, testcase):
 340    """Check one specific case
 341
 342    Returns a dictionary containing failure information on error,
 343    or None on success
 344    """
 345    binary = testcase['binary']
 346    accel = testcase['accel']
 347    machine = testcase['machine']
 348    device = testcase['device']
 349
 350    dbg("will test: %r", testcase)
 351
 352    args = ['-S', '-machine', '%s,accel=%s' % (machine, accel),
 353            '-device', qemuOptsEscape(device)]
 354    cmdline = ' '.join([binary] + args)
 355    dbg("will launch QEMU: %s", cmdline)
 356    vm = QEMUMachine(binary=binary, args=args, qmp_timer=15)
 357
 358    exc = None
 359    exc_traceback = None
 360    try:
 361        vm.launch()
 362    except Exception as this_exc:
 363        exc = this_exc
 364        exc_traceback = traceback.format_exc()
 365        dbg("Exception while running test case")
 366    finally:
 367        vm.shutdown()
 368        ec = vm.exitcode()
 369        log = vm.get_log()
 370
 371    if exc is not None or ec != 0:
 372        return {'exc': exc,
 373                'exc_traceback':exc_traceback,
 374                'exitcode':ec,
 375                'log':log,
 376                'testcase':testcase,
 377                'cmdline':cmdline}
 378
 379
 380def binariesToTest(args, testcase):
 381    if args.qemu:
 382        r = args.qemu
 383    else:
 384        r = [f.path for f in os.scandir('.')
 385             if f.name.startswith('qemu-system-') and
 386                f.is_file() and os.access(f, os.X_OK)]
 387    return r
 388
 389
 390def accelsToTest(args, testcase):
 391    if getBinaryInfo(args, testcase['binary']).kvm_available:
 392        yield 'kvm'
 393    yield 'tcg'
 394
 395
 396def machinesToTest(args, testcase):
 397    return getBinaryInfo(args, testcase['binary']).machines
 398
 399
 400def devicesToTest(args, testcase):
 401    return getBinaryInfo(args, testcase['binary']).user_devs
 402
 403
 404TESTCASE_VARIABLES = [
 405    ('binary', binariesToTest),
 406    ('accel', accelsToTest),
 407    ('machine', machinesToTest),
 408    ('device', devicesToTest),
 409]
 410
 411
 412def genCases1(args, testcases, var, fn):
 413    """Generate new testcases for one variable
 414
 415    If an existing item already has a variable set, don't
 416    generate new items and just return it directly. This
 417    allows the "-t" command-line option to be used to choose
 418    a specific test case.
 419    """
 420    for testcase in testcases:
 421        if var in testcase:
 422            yield testcase.copy()
 423        else:
 424            for i in fn(args, testcase):
 425                t = testcase.copy()
 426                t[var] = i
 427                yield t
 428
 429
 430def genCases(args, testcase):
 431    """Generate test cases for all variables
 432    """
 433    cases = [testcase.copy()]
 434    for var, fn in TESTCASE_VARIABLES:
 435        dbg("var: %r, fn: %r", var, fn)
 436        cases = genCases1(args, cases, var, fn)
 437    return cases
 438
 439
 440def casesToTest(args, testcase):
 441    cases = genCases(args, testcase)
 442    if args.random:
 443        cases = list(cases)
 444        cases = random.sample(cases, min(args.random, len(cases)))
 445    if args.debug:
 446        cases = list(cases)
 447        dbg("%d test cases to test", len(cases))
 448    if args.shuffle:
 449        cases = list(cases)
 450        random.shuffle(cases)
 451    return cases
 452
 453
 454def logFailure(f, level):
 455    t = f['testcase']
 456    logger.log(level, "failed: %s", formatTestCase(t))
 457    logger.log(level, "cmdline: %s", f['cmdline'])
 458    for l in f['log'].strip().split('\n'):
 459        logger.log(level, "log: %s", l)
 460    logger.log(level, "exit code: %r", f['exitcode'])
 461
 462    # If the Exception is merely a QMP connect error,
 463    # reduce the logging level for its traceback to
 464    # improve visual clarity.
 465    if isinstance(f.get('exc'), ConnectError):
 466        logger.log(level, "%s.%s: %s",
 467                   type(f['exc']).__module__,
 468                   type(f['exc']).__qualname__,
 469                   str(f['exc']))
 470        level = logging.DEBUG
 471
 472    if f['exc_traceback']:
 473        logger.log(level, "exception:")
 474        for l in f['exc_traceback'].split('\n'):
 475            logger.log(level, "  %s", l.rstrip('\n'))
 476
 477
 478def main():
 479    parser = argparse.ArgumentParser(description="QEMU -device crash test")
 480    parser.add_argument('-t', metavar='KEY=VALUE', nargs='*',
 481                        help="Limit test cases to KEY=VALUE",
 482                        action='append', dest='testcases', default=[])
 483    parser.add_argument('-d', '--debug', action='store_true',
 484                        help='debug output')
 485    parser.add_argument('-v', '--verbose', action='store_true', default=True,
 486                        help='verbose output')
 487    parser.add_argument('-q', '--quiet', dest='verbose', action='store_false',
 488                        help='non-verbose output')
 489    parser.add_argument('-r', '--random', type=int, metavar='COUNT',
 490                        help='run a random sample of COUNT test cases',
 491                        default=0)
 492    parser.add_argument('--shuffle', action='store_true',
 493                        help='Run test cases in random order')
 494    parser.add_argument('--dry-run', action='store_true',
 495                        help="Don't run any tests, just generate list")
 496    parser.add_argument('-D', '--devtype', metavar='TYPE',
 497                        help="Test only device types that implement TYPE")
 498    parser.add_argument('-Q', '--quick', action='store_true', default=True,
 499                        help="Quick mode: skip test cases that are expected to fail")
 500    parser.add_argument('-F', '--full', action='store_false', dest='quick',
 501                        help="Full mode: test cases that are expected to fail")
 502    parser.add_argument('--strict', action='store_true', dest='strict',
 503                        help="Treat all warnings as fatal")
 504    parser.add_argument('qemu', nargs='*', metavar='QEMU',
 505                        help='QEMU binary to run')
 506    args = parser.parse_args()
 507
 508    if args.debug:
 509        lvl = logging.DEBUG
 510    elif args.verbose:
 511        lvl = logging.INFO
 512    else:
 513        lvl = logging.WARN
 514    logging.basicConfig(stream=sys.stdout, level=lvl, format='%(levelname)s: %(message)s')
 515
 516    if not args.debug:
 517        # Async QMP, when in use, is chatty about connection failures.
 518        # This script knowingly generates a ton of connection errors.
 519        # Silence this logger.
 520        logging.getLogger('qemu.aqmp.qmp_client').setLevel(logging.CRITICAL)
 521
 522    fatal_failures = []
 523    wl_stats = {}
 524    skipped = 0
 525    total = 0
 526
 527    tc = {}
 528    dbg("testcases: %r", args.testcases)
 529    if args.testcases:
 530        for t in chain(*args.testcases):
 531            for kv in t.split():
 532                k, v = kv.split('=', 1)
 533                tc[k] = v
 534
 535    if len(binariesToTest(args, tc)) == 0:
 536        print("No QEMU binary found", file=sys.stderr)
 537        parser.print_usage(sys.stderr)
 538        return 1
 539
 540    for t in casesToTest(args, tc):
 541        logger.info("running test case: %s", formatTestCase(t))
 542        total += 1
 543
 544        expected_match = findExpectedResult(t)
 545        if (args.quick and
 546                (expected_match or
 547                 not getBinaryInfo(args, t['binary']).machineInfo(t['machine'])['runnable'])):
 548            dbg("skipped: %s", formatTestCase(t))
 549            skipped += 1
 550            continue
 551
 552        if args.dry_run:
 553            continue
 554
 555        try:
 556            f = checkOneCase(args, t)
 557        except KeyboardInterrupt:
 558            break
 559
 560        if f:
 561            i, rule = checkResultRuleList(f)
 562            dbg("testcase: %r, rule list match: %r", t, rule)
 563            wl_stats.setdefault(i, []).append(f)
 564            level = rule.get('loglevel', logging.DEBUG)
 565            logFailure(f, level)
 566            if rule.get('fatal') or (args.strict and level >= logging.WARN):
 567                fatal_failures.append(f)
 568        else:
 569            dbg("success: %s", formatTestCase(t))
 570            if expected_match:
 571                logger.warn("Didn't fail as expected: %s", formatTestCase(t))
 572
 573    logger.info("Total: %d test cases", total)
 574    if skipped:
 575        logger.info("Skipped %d test cases", skipped)
 576
 577    if args.debug:
 578        stats = sorted([(len(wl_stats.get(i, [])), rule) for i, rule in
 579                         enumerate(ERROR_RULE_LIST)], key=lambda x: x[0])
 580        for count, rule in stats:
 581            dbg("error rule stats: %d: %r", count, rule)
 582
 583    if fatal_failures:
 584        for f in fatal_failures:
 585            t = f['testcase']
 586            logger.error("Fatal failure: %s", formatTestCase(t))
 587        logger.error("Fatal failures on some machine/device combinations")
 588        return 1
 589
 590if __name__ == '__main__':
 591    sys.exit(main())
 592