3 # Copyright (c) 2017 Red Hat Inc
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.
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.
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.
23 Run QEMU with all combinations of -machine and -device types,
24 check for crashes and unexpected errors.
26 from __future__ import print_function
36 from itertools import chain
38 from qemu import QEMUMachine
40 logger = logging.getLogger('device-crash-test')
44 # Purposes of the following whitelist:
45 # * Avoiding verbose log messages when we find known non-fatal
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
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.
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.
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)
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':'ARM,bitband-memory', 'expected':True}, # source-memory property not set
76 {'device':'arm.cortex-a9-global-timer', 'expected':True}, # a9_gtimer_realize: num-cpu must be between 1 and 4
77 {'device':'arm_mptimer', 'expected':True}, # num-cpu must be between 1 and 4
78 {'device':'armv7m', 'expected':True}, # memory property was not set
79 {'device':'aspeed.scu', 'expected':True}, # Unknown silicon revision: 0x0
80 {'device':'aspeed.sdmc', 'expected':True}, # Unknown silicon revision: 0x0
81 {'device':'bcm2835-dma', 'expected':True}, # bcm2835_dma_realize: required dma-mr link not found: Property '.dma-mr' not found
82 {'device':'bcm2835-fb', 'expected':True}, # bcm2835_fb_realize: required vcram-base property not set
83 {'device':'bcm2835-mbox', 'expected':True}, # bcm2835_mbox_realize: required mbox-mr link not found: Property '.mbox-mr' not found
84 {'device':'bcm2835-peripherals', 'expected':True}, # bcm2835_peripherals_realize: required ram link not found: Property '.ram' not found
85 {'device':'bcm2835-property', 'expected':True}, # bcm2835_property_realize: required fb link not found: Property '.fb' not found
86 {'device':'bcm2835_gpio', 'expected':True}, # bcm2835_gpio_realize: required sdhci link not found: Property '.sdbus-sdhci' not found
87 {'device':'bcm2836', 'expected':True}, # bcm2836_realize: required ram link not found: Property '.ram' not found
88 {'device':'cfi.pflash01', 'expected':True}, # attribute "sector-length" not specified or zero.
89 {'device':'cfi.pflash02', 'expected':True}, # attribute "sector-length" not specified or zero.
90 {'device':'icp', 'expected':True}, # icp_realize: required link 'xics' not found: Property '.xics' not found
91 {'device':'ics', 'expected':True}, # ics_base_realize: required link 'xics' not found: Property '.xics' not found
92 # "-device ide-cd" does work on more recent QEMU versions, so it doesn't have expected=True
93 {'device':'ide-cd'}, # No drive specified
94 {'device':'ide-drive', 'expected':True}, # No drive specified
95 {'device':'ide-hd', 'expected':True}, # No drive specified
96 {'device':'ipmi-bmc-extern', 'expected':True}, # IPMI external bmc requires chardev attribute
97 {'device':'isa-debugcon', 'expected':True}, # Can't create serial device, empty char device
98 {'device':'isa-ipmi-bt', 'expected':True}, # IPMI device requires a bmc attribute to be set
99 {'device':'isa-ipmi-kcs', 'expected':True}, # IPMI device requires a bmc attribute to be set
100 {'device':'isa-parallel', 'expected':True}, # Can't create serial device, empty char device
101 {'device':'ivshmem', 'expected':True}, # You must specify either 'shm' or 'chardev'
102 {'device':'ivshmem-doorbell', 'expected':True}, # You must specify a 'chardev'
103 {'device':'ivshmem-plain', 'expected':True}, # You must specify a 'memdev'
104 {'device':'loader', 'expected':True}, # please include valid arguments
105 {'device':'nand', 'expected':True}, # Unsupported NAND block size 0x1
106 {'device':'nvdimm', 'expected':True}, # 'memdev' property is not set
107 {'device':'nvme', 'expected':True}, # Device initialization failed
108 {'device':'pc-dimm', 'expected':True}, # 'memdev' property is not set
109 {'device':'pci-bridge', 'expected':True}, # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
110 {'device':'pci-bridge-seat', 'expected':True}, # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
111 {'device':'pxa2xx-dma', 'expected':True}, # channels value invalid
112 {'device':'pxb', 'expected':True}, # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
113 {'device':'scsi-block', 'expected':True}, # drive property not set
114 {'device':'scsi-disk', 'expected':True}, # drive property not set
115 {'device':'scsi-generic', 'expected':True}, # drive property not set
116 {'device':'scsi-hd', 'expected':True}, # drive property not set
117 {'device':'spapr-pci-host-bridge', 'expected':True}, # BUID not specified for PHB
118 {'device':'spapr-rng', 'expected':True}, # spapr-rng needs an RNG backend!
119 {'device':'spapr-vty', 'expected':True}, # chardev property not set
120 {'device':'tpm-tis', 'expected':True}, # tpm_tis: backend driver with id (null) could not be found
121 {'device':'unimplemented-device', 'expected':True}, # property 'size' not specified or zero
122 {'device':'usb-braille', 'expected':True}, # Property chardev is required
123 {'device':'usb-mtp', 'expected':True}, # rootdir property must be configured
124 {'device':'usb-redir', 'expected':True}, # Parameter 'chardev' is missing
125 {'device':'usb-serial', 'expected':True}, # Property chardev is required
126 {'device':'usb-storage', 'expected':True}, # drive property not set
127 {'device':'vfio-amd-xgbe', 'expected':True}, # -device vfio-amd-xgbe: vfio error: wrong host device name
128 {'device':'vfio-calxeda-xgmac', 'expected':True}, # -device vfio-calxeda-xgmac: vfio error: wrong host device name
129 {'device':'vfio-pci', 'expected':True}, # No provided host device
130 {'device':'vfio-pci-igd-lpc-bridge', 'expected':True}, # VFIO dummy ISA/LPC bridge must have address 1f.0
131 {'device':'vhost-scsi.*', 'expected':True}, # vhost-scsi: missing wwpn
132 {'device':'vhost-vsock-device', 'expected':True}, # guest-cid property must be greater than 2
133 {'device':'vhost-vsock-pci', 'expected':True}, # guest-cid property must be greater than 2
134 {'device':'virtio-9p-ccw', 'expected':True}, # 9pfs device couldn't find fsdev with the id = NULL
135 {'device':'virtio-9p-device', 'expected':True}, # 9pfs device couldn't find fsdev with the id = NULL
136 {'device':'virtio-9p-pci', 'expected':True}, # 9pfs device couldn't find fsdev with the id = NULL
137 {'device':'virtio-blk-ccw', 'expected':True}, # drive property not set
138 {'device':'virtio-blk-device', 'expected':True}, # drive property not set
139 {'device':'virtio-blk-device', 'expected':True}, # drive property not set
140 {'device':'virtio-blk-pci', 'expected':True}, # drive property not set
141 {'device':'virtio-crypto-ccw', 'expected':True}, # 'cryptodev' parameter expects a valid object
142 {'device':'virtio-crypto-device', 'expected':True}, # 'cryptodev' parameter expects a valid object
143 {'device':'virtio-crypto-pci', 'expected':True}, # 'cryptodev' parameter expects a valid object
144 {'device':'virtio-input-host-device', 'expected':True}, # evdev property is required
145 {'device':'virtio-input-host-pci', 'expected':True}, # evdev property is required
146 {'device':'xen-pvdevice', 'expected':True}, # Device ID invalid, it must always be supplied
147 {'device':'vhost-vsock-ccw', 'expected':True}, # guest-cid property must be greater than 2
148 {'device':'ALTR.timer', 'expected':True}, # "clock-frequency" property must be provided
149 {'device':'zpci', 'expected':True}, # target must be defined
150 {'device':'pnv-(occ|icp|lpc)', 'expected':True}, # required link 'xics' not found: Property '.xics' not found
151 {'device':'powernv-cpu-.*', 'expected':True}, # pnv_core_realize: required link 'xics' not found: Property '.xics' not found
153 # ioapic devices are already created by pc and will fail:
154 {'machine':'q35|pc.*', 'device':'kvm-ioapic', 'expected':True}, # Only 1 ioapics allowed
155 {'machine':'q35|pc.*', 'device':'ioapic', 'expected':True}, # Only 1 ioapics allowed
157 # "spapr-cpu-core needs a pseries machine"
158 {'machine':'(?!pseries).*', 'device':'.*-spapr-cpu-core', 'expected':True},
160 # KVM-specific devices shouldn't be tried without accel=kvm:
161 {'accel':'(?!kvm).*', 'device':'kvmclock', 'expected':True},
163 # xen-specific machines and devices:
164 {'accel':'(?!xen).*', 'machine':'xen.*', 'expected':True},
165 {'accel':'(?!xen).*', 'device':'xen-.*', 'expected':True},
167 # this fails on some machine-types, but not all, so they don't have expected=True:
168 {'device':'vmgenid'}, # vmgenid requires DMA write support in fw_cfg, which this machine type does not provide
170 # Silence INFO messages for errors that are common on multiple
172 {'log':r"No '[\w-]+' bus found for device '[\w-]+'"},
173 {'log':r"images* must be given with the 'pflash' parameter"},
174 {'log':r"(Guest|ROM|Flash|Kernel) image must be specified"},
175 {'log':r"[cC]ould not load [\w ]+ (BIOS|bios) '[\w-]+\.bin'"},
176 {'log':r"Couldn't find rom image '[\w-]+\.bin'"},
177 {'log':r"speed mismatch trying to attach usb device"},
178 {'log':r"Can't create a second ISA bus"},
179 {'log':r"duplicate fw_cfg file name"},
180 # sysbus-related error messages: most machines reject most dynamic sysbus devices:
181 {'log':r"Option '-device [\w.,-]+' cannot be handled by this machine"},
182 {'log':r"Device [\w.,-]+ is not supported by this machine yet"},
183 {'log':r"Device [\w.,-]+ can not be dynamically instantiated"},
184 {'log':r"Platform Bus: Can not fit MMIO region of size "},
185 # other more specific errors we will ignore:
186 {'device':'.*-spapr-cpu-core', 'log':r"CPU core type should be"},
187 {'log':r"MSI(-X)? is not supported by interrupt controller"},
188 {'log':r"pxb-pcie? devices cannot reside on a PCIe? bus"},
189 {'log':r"Ignoring smp_cpus value"},
190 {'log':r"sd_init failed: Drive 'sd0' is already in use because it has been automatically connected to another device"},
191 {'log':r"This CPU requires a smaller page size than the system is using"},
192 {'log':r"MSI-X support is mandatory in the S390 architecture"},
193 {'log':r"rom check and register reset failed"},
194 {'log':r"Unable to initialize GIC, CPUState for CPU#0 not valid"},
195 {'log':r"Multiple VT220 operator consoles are not supported"},
196 {'log':r"core 0 already populated"},
197 {'log':r"could not find stage1 bootloader"},
199 # other exitcode=1 failures not listed above will just generate INFO messages:
200 {'exitcode':1, 'loglevel':logging.INFO},
203 # Known crashes will generate error messages, but won't be fatal.
204 # Those entries must be removed once we fix the crashes.
205 {'exitcode':-6, 'log':r"Device 'serial0' is in use", 'loglevel':logging.ERROR},
206 {'exitcode':-6, 'log':r"qemu_net_client_setup: Assertion `!peer->peer' failed", 'loglevel':logging.ERROR},
207 {'exitcode':-6, 'log':r'RAMBlock "[\w.-]+" already registered', 'loglevel':logging.ERROR},
208 {'exitcode':-6, 'log':r"find_ram_offset: Assertion `size != 0' failed.", 'loglevel':logging.ERROR},
209 {'exitcode':-6, 'log':r"add_cpreg_to_hashtable: code should not be reached", 'loglevel':logging.ERROR},
210 {'exitcode':-6, 'log':r"qemu_alloc_display: Assertion `surface->image != NULL' failed", 'loglevel':logging.ERROR},
211 {'exitcode':-6, 'log':r"Unexpected error in error_set_from_qdev_prop_error", 'loglevel':logging.ERROR},
212 {'exitcode':-6, 'log':r"Object .* is not an instance of type spapr-machine", 'loglevel':logging.ERROR},
213 {'exitcode':-6, 'log':r"Object .* is not an instance of type generic-pc-machine", 'loglevel':logging.ERROR},
214 {'exitcode':-6, 'log':r"Object .* is not an instance of type e500-ccsr", 'loglevel':logging.ERROR},
215 {'exitcode':-6, 'log':r"vmstate_register_with_alias_id: Assertion `!se->compat \|\| se->instance_id == 0' failed", 'loglevel':logging.ERROR},
217 # everything else (including SIGABRT and SIGSEGV) will be a fatal error:
218 {'exitcode':None, 'fatal':True, 'loglevel':logging.FATAL},
222 def whitelistTestCaseMatch(wl, t):
223 """Check if a test case specification can match a whitelist entry
225 This only checks if a whitelist entry is a candidate match
226 for a given test case, it won't check if the test case
227 results/output match the entry. See whitelistResultMatch().
229 return (('machine' not in wl or
230 'machine' not in t or
231 re.match(wl['machine'] + '$', t['machine'])) and
232 ('accel' not in wl or
234 re.match(wl['accel'] + '$', t['accel'])) and
235 ('device' not in wl or
237 re.match(wl['device'] + '$', t['device'])))
240 def whitelistCandidates(t):
241 """Generate the list of candidates that can match a test case"""
242 for i, wl in enumerate(ERROR_WHITELIST):
243 if whitelistTestCaseMatch(wl, t):
247 def findExpectedResult(t):
248 """Check if there's an expected=True whitelist entry for a test case
250 Returns (i, wl) tuple, where i is the index in
251 ERROR_WHITELIST and wl is the whitelist entry itself.
253 for i, wl in whitelistCandidates(t):
254 if wl.get('expected'):
258 def whitelistResultMatch(wl, r):
259 """Check if test case results/output match a whitelist entry
261 It is valid to call this function only if
262 whitelistTestCaseMatch() is True for the entry (e.g. on
263 entries returned by whitelistCandidates())
265 assert whitelistTestCaseMatch(wl, r['testcase'])
266 return ((wl.get('exitcode', 1) is None or
267 r['exitcode'] == wl.get('exitcode', 1)) and
269 re.search(wl['log'], r['log'], re.MULTILINE)))
272 def checkResultWhitelist(r):
273 """Look up whitelist entry for a given test case result
275 Returns (i, wl) tuple, where i is the index in
276 ERROR_WHITELIST and wl is the whitelist entry itself.
278 for i, wl in whitelistCandidates(r['testcase']):
279 if whitelistResultMatch(wl, r):
282 raise Exception("this should never happen")
285 def qemuOptsEscape(s):
286 """Escape option value QemuOpts"""
287 return s.replace(",", ",,")
290 def formatTestCase(t):
291 """Format test case info as "key=value key=value" for prettier logging output"""
292 return ' '.join('%s=%s' % (k, v) for k, v in t.items())
295 def qomListTypeNames(vm, **kwargs):
296 """Run qom-list-types QMP command, return type names"""
297 types = vm.command('qom-list-types', **kwargs)
298 return [t['name'] for t in types]
302 """Parse 'info qdm' output"""
303 args = {'command-line': 'info qdm'}
304 devhelp = vm.command('human-monitor-command', **args)
305 for l in devhelp.split('\n'):
307 if l == '' or l.endswith(':'):
309 d = {'name': re.search(r'name "([^"]+)"', l).group(1),
310 'no-user': (re.search(', no-user', l) is not None)}
314 class QemuBinaryInfo(object):
315 def __init__(self, binary, devtype):
320 self._machine_info = {}
322 dbg("devtype: %r", devtype)
323 args = ['-S', '-machine', 'none,accel=kvm:tcg']
324 dbg("querying info for QEMU binary: %s", binary)
325 vm = QEMUMachine(binary=binary, args=args)
328 self.alldevs = set(qomListTypeNames(vm, implements=devtype, abstract=False))
329 # there's no way to query DeviceClass::user_creatable using QMP,
331 self.no_user_devs = set([d['name'] for d in infoQDM(vm, ) if d['no-user']])
332 self.machines = list(m['name'] for m in vm.command('query-machines'))
333 self.user_devs = self.alldevs.difference(self.no_user_devs)
334 self.kvm_available = vm.command('query-kvm')['enabled']
338 def machineInfo(self, machine):
339 """Query for information on a specific machine-type
341 Results are cached internally, in case the same machine-
342 type is queried multiple times.
344 if machine in self._machine_info:
345 return self._machine_info[machine]
348 args = ['-S', '-machine', '%s' % (machine)]
349 dbg("querying machine info for binary=%s machine=%s", self.binary, machine)
350 vm = QEMUMachine(binary=self.binary, args=args)
353 mi['runnable'] = True
354 except KeyboardInterrupt:
357 dbg("exception trying to run binary=%s machine=%s", self.binary, machine, exc_info=sys.exc_info())
358 dbg("log: %r", vm.get_log())
359 mi['runnable'] = False
362 self._machine_info[machine] = mi
369 def getBinaryInfo(args, binary):
370 if binary not in BINARY_INFO:
371 BINARY_INFO[binary] = QemuBinaryInfo(binary, args.devtype)
372 return BINARY_INFO[binary]
375 def checkOneCase(args, testcase):
376 """Check one specific case
378 Returns a dictionary containing failure information on error,
381 binary = testcase['binary']
382 accel = testcase['accel']
383 machine = testcase['machine']
384 device = testcase['device']
386 dbg("will test: %r", testcase)
388 args = ['-S', '-machine', '%s,accel=%s' % (machine, accel),
389 '-device', qemuOptsEscape(device)]
390 cmdline = ' '.join([binary] + args)
391 dbg("will launch QEMU: %s", cmdline)
392 vm = QEMUMachine(binary=binary, args=args)
397 except KeyboardInterrupt:
400 exc_traceback = traceback.format_exc()
401 dbg("Exception while running test case")
407 if exc_traceback is not None or ec != 0:
408 return {'exc_traceback':exc_traceback,
415 def binariesToTest(args, testcase):
419 r = glob.glob('./*-softmmu/qemu-system-*')
423 def accelsToTest(args, testcase):
424 if getBinaryInfo(args, testcase['binary']).kvm_available:
429 def machinesToTest(args, testcase):
430 return getBinaryInfo(args, testcase['binary']).machines
433 def devicesToTest(args, testcase):
434 return getBinaryInfo(args, testcase['binary']).user_devs
437 TESTCASE_VARIABLES = [
438 ('binary', binariesToTest),
439 ('accel', accelsToTest),
440 ('machine', machinesToTest),
441 ('device', devicesToTest),
445 def genCases1(args, testcases, var, fn):
446 """Generate new testcases for one variable
448 If an existing item already has a variable set, don't
449 generate new items and just return it directly. This
450 allows the "-t" command-line option to be used to choose
451 a specific test case.
453 for testcase in testcases:
455 yield testcase.copy()
457 for i in fn(args, testcase):
463 def genCases(args, testcase):
464 """Generate test cases for all variables
466 cases = [testcase.copy()]
467 for var, fn in TESTCASE_VARIABLES:
468 dbg("var: %r, fn: %r", var, fn)
469 cases = genCases1(args, cases, var, fn)
473 def casesToTest(args, testcase):
474 cases = genCases(args, testcase)
477 cases = random.sample(cases, min(args.random, len(cases)))
480 dbg("%d test cases to test", len(cases))
483 random.shuffle(cases)
487 def logFailure(f, level):
489 logger.log(level, "failed: %s", formatTestCase(t))
490 logger.log(level, "cmdline: %s", f['cmdline'])
491 for l in f['log'].strip().split('\n'):
492 logger.log(level, "log: %s", l)
493 logger.log(level, "exit code: %r", f['exitcode'])
494 if f['exc_traceback']:
495 logger.log(level, "exception:")
496 for l in f['exc_traceback'].split('\n'):
497 logger.log(level, " %s", l.rstrip('\n'))
501 parser = argparse.ArgumentParser(description="QEMU -device crash test")
502 parser.add_argument('-t', metavar='KEY=VALUE', nargs='*',
503 help="Limit test cases to KEY=VALUE",
504 action='append', dest='testcases', default=[])
505 parser.add_argument('-d', '--debug', action='store_true',
507 parser.add_argument('-v', '--verbose', action='store_true', default=True,
508 help='verbose output')
509 parser.add_argument('-q', '--quiet', dest='verbose', action='store_false',
510 help='non-verbose output')
511 parser.add_argument('-r', '--random', type=int, metavar='COUNT',
512 help='run a random sample of COUNT test cases',
514 parser.add_argument('--shuffle', action='store_true',
515 help='Run test cases in random order')
516 parser.add_argument('--dry-run', action='store_true',
517 help="Don't run any tests, just generate list")
518 parser.add_argument('-D', '--devtype', metavar='TYPE',
519 help="Test only device types that implement TYPE")
520 parser.add_argument('-Q', '--quick', action='store_true', default=True,
521 help="Quick mode: skip test cases that are expected to fail")
522 parser.add_argument('-F', '--full', action='store_false', dest='quick',
523 help="Full mode: test cases that are expected to fail")
524 parser.add_argument('--strict', action='store_true', dest='strict',
525 help="Treat all warnings as fatal")
526 parser.add_argument('qemu', nargs='*', metavar='QEMU',
527 help='QEMU binary to run')
528 args = parser.parse_args()
536 logging.basicConfig(stream=sys.stdout, level=lvl, format='%(levelname)s: %(message)s')
544 dbg("testcases: %r", args.testcases)
546 for t in chain(*args.testcases):
548 k, v = kv.split('=', 1)
551 if len(binariesToTest(args, tc)) == 0:
552 print("No QEMU binary found", file=sys.stderr)
553 parser.print_usage(sys.stderr)
556 for t in casesToTest(args, tc):
557 logger.info("running test case: %s", formatTestCase(t))
560 expected_match = findExpectedResult(t)
563 not getBinaryInfo(args, t['binary']).machineInfo(t['machine'])['runnable'])):
564 dbg("skipped: %s", formatTestCase(t))
572 f = checkOneCase(args, t)
573 except KeyboardInterrupt:
577 i, wl = checkResultWhitelist(f)
578 dbg("testcase: %r, whitelist match: %r", t, wl)
579 wl_stats.setdefault(i, []).append(f)
580 level = wl.get('loglevel', logging.DEBUG)
582 if wl.get('fatal') or (args.strict and level >= logging.WARN):
583 fatal_failures.append(f)
585 dbg("success: %s", formatTestCase(t))
587 logger.warn("Didn't fail as expected: %s", formatTestCase(t))
589 logger.info("Total: %d test cases", total)
591 logger.info("Skipped %d test cases", skipped)
594 stats = sorted([(len(wl_stats.get(i, [])), wl) for i, wl in enumerate(ERROR_WHITELIST)])
595 for count, wl in stats:
596 dbg("whitelist entry stats: %d: %r", count, wl)
599 for f in fatal_failures:
601 logger.error("Fatal failure: %s", formatTestCase(t))
602 logger.error("Fatal failures on some machine/device combinations")
605 if __name__ == '__main__':