aboutsummaryrefslogtreecommitdiff
path: root/scripts/device-crash-test
blob: 043b24a4aa8c6b8391d8b4b2706d6c5aea1ee5d1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
#!/usr/bin/env python2.7
#
#  Copyright (c) 2017 Red Hat Inc
#
# Author:
#  Eduardo Habkost <ehabkost@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

"""
Run QEMU with all combinations of -machine and -device types,
check for crashes and unexpected errors.
"""

import sys
import os
import glob
import logging
import traceback
import re
import random
import argparse
from itertools import chain

sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'scripts'))
from qemu import QEMUMachine

logger = logging.getLogger('device-crash-test')
dbg = logger.debug


# Purposes of the following whitelist:
# * Avoiding verbose log messages when we find known non-fatal
#   (exitcode=1) errors
# * Avoiding fatal errors when we find known crashes
# * Skipping machines/devices that are known not to work out of
#   the box, when running in --quick mode
#
# Keeping the whitelist updated is desirable, but not required,
# because unexpected cases where QEMU exits with exitcode=1 will
# just trigger a INFO message.

# Valid whitelist entry keys:
# * accel: regexp, full match only
# * machine: regexp, full match only
# * device: regexp, full match only
# * log: regexp, partial match allowed
# * exitcode: if not present, defaults to 1. If None, matches any exitcode
# * warn: if True, matching failures will be logged as warnings
# * expected: if True, QEMU is expected to always fail every time
#   when testing the corresponding test case
# * loglevel: log level of log output when there's a match.
ERROR_WHITELIST = [
    # Machines that won't work out of the box:
    #             MACHINE                         | ERROR MESSAGE
    {'machine':'niagara', 'expected':True},       # Unable to load a firmware for -M niagara
    {'machine':'boston', 'expected':True},        # Please provide either a -kernel or -bios argument
    {'machine':'leon3_generic', 'expected':True}, # Can't read bios image (null)

    # devices that don't work out of the box because they require extra options to "-device DEV":
    #            DEVICE                                    | ERROR MESSAGE
    {'device':'.*-(i386|x86_64)-cpu', 'expected':True},    # CPU socket-id is not set
    {'device':'ARM,bitband-memory', 'expected':True},      # source-memory property not set
    {'device':'arm.cortex-a9-global-timer', 'expected':True}, # a9_gtimer_realize: num-cpu must be between 1 and 4
    {'device':'arm_mptimer', 'expected':True},             # num-cpu must be between 1 and 4
    {'device':'armv7m', 'expected':True},                  # memory property was not set
    {'device':'aspeed.scu', 'expected':True},              # Unknown silicon revision: 0x0
    {'device':'aspeed.sdmc', 'expected':True},             # Unknown silicon revision: 0x0
    {'device':'bcm2835-dma', 'expected':True},             # bcm2835_dma_realize: required dma-mr link not found: Property '.dma-mr' not found
    {'device':'bcm2835-fb', 'expected':True},              # bcm2835_fb_realize: required vcram-base property not set
    {'device':'bcm2835-mbox', 'expected':True},            # bcm2835_mbox_realize: required mbox-mr link not found: Property '.mbox-mr' not found
    {'device':'bcm2835-peripherals', 'expected':True},     # bcm2835_peripherals_realize: required ram link not found: Property '.ram' not found
    {'device':'bcm2835-property', 'expected':True},        # bcm2835_property_realize: required fb link not found: Property '.fb' not found
    {'device':'bcm2835_gpio', 'expected':True},            # bcm2835_gpio_realize: required sdhci link not found: Property '.sdbus-sdhci' not found
    {'device':'bcm2836', 'expected':True},                 # bcm2836_realize: required ram link not found: Property '.ram' not found
    {'device':'cfi.pflash01', 'expected':True},            # attribute "sector-length" not specified or zero.
    {'device':'cfi.pflash02', 'expected':True},            # attribute "sector-length" not specified or zero.
    {'device':'icp', 'expected':True},                     # icp_realize: required link 'xics' not found: Property '.xics' not found
    {'device':'ics', 'expected':True},                     # ics_base_realize: required link 'xics' not found: Property '.xics' not found
    # "-device ide-cd" does work on more recent QEMU versions, so it doesn't have expected=True
    {'device':'ide-cd'},                                 # No drive specified
    {'device':'ide-drive', 'expected':True},               # No drive specified
    {'device':'ide-hd', 'expected':True},                  # No drive specified
    {'device':'ipmi-bmc-extern', 'expected':True},         # IPMI external bmc requires chardev attribute
    {'device':'isa-debugcon', 'expected':True},            # Can't create serial device, empty char device
    {'device':'isa-ipmi-bt', 'expected':True},             # IPMI device requires a bmc attribute to be set
    {'device':'isa-ipmi-kcs', 'expected':True},            # IPMI device requires a bmc attribute to be set
    {'device':'isa-parallel', 'expected':True},            # Can't create serial device, empty char device
    {'device':'isa-serial', 'expected':True},              # Can't create serial device, empty char device
    {'device':'ivshmem', 'expected':True},                 # You must specify either 'shm' or 'chardev'
    {'device':'ivshmem-doorbell', 'expected':True},        # You must specify a 'chardev'
    {'device':'ivshmem-plain', 'expected':True},           # You must specify a 'memdev'
    {'device':'kvm-pci-assign', 'expected':True},          # no host device specified
    {'device':'loader', 'expected':True},                  # please include valid arguments
    {'device':'nand', 'expected':True},                    # Unsupported NAND block size 0x1
    {'device':'nvdimm', 'expected':True},                  # 'memdev' property is not set
    {'device':'nvme', 'expected':True},                    # Device initialization failed
    {'device':'pc-dimm', 'expected':True},                 # 'memdev' property is not set
    {'device':'pci-bridge', 'expected':True},              # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
    {'device':'pci-bridge-seat', 'expected':True},         # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
    {'device':'pci-serial', 'expected':True},              # Can't create serial device, empty char device
    {'device':'pci-serial-2x', 'expected':True},           # Can't create serial device, empty char device
    {'device':'pci-serial-4x', 'expected':True},           # Can't create serial device, empty char device
    {'device':'pxa2xx-dma', 'expected':True},              # channels value invalid
    {'device':'pxb', 'expected':True},                     # Bridge chassis not specified. Each bridge is required to be assigned a unique chassis id > 0.
    {'device':'scsi-block', 'expected':True},              # drive property not set
    {'device':'scsi-disk', 'expected':True},               # drive property not set
    {'device':'scsi-generic', 'expected':True},            # drive property not set
    {'device':'scsi-hd', 'expected':True},                 # drive property not set
    {'device':'spapr-pci-host-bridge', 'expected':True},   # BUID not specified for PHB
    {'device':'spapr-pci-vfio-host-bridge', 'expected':True}, # BUID not specified for PHB
    {'device':'spapr-rng', 'expected':True},               # spapr-rng needs an RNG backend!
    {'device':'spapr-vty', 'expected':True},               # chardev property not set
    {'device':'tpm-tis', 'expected':True},                 # tpm_tis: backend driver with id (null) could not be found
    {'device':'unimplemented-device', 'expected':True},    # property 'size' not specified or zero
    {'device':'usb-braille', 'expected':True},             # Property chardev is required
    {'device':'usb-mtp', 'expected':True},                 # x-root property must be configured
    {'device':'usb-redir', 'expected':True},               # Parameter 'chardev' is missing
    {'device':'usb-serial', 'expected':True},              # Property chardev is required
    {'device':'usb-storage', 'expected':True},             # drive property not set
    {'device':'vfio-amd-xgbe', 'expected':True},           # -device vfio-amd-xgbe: vfio error: wrong host device name
    {'device':'vfio-calxeda-xgmac', 'expected':True},      # -device vfio-calxeda-xgmac: vfio error: wrong host device name
    {'device':'vfio-pci', 'expected':True},                # No provided host device
    {'device':'vfio-pci-igd-lpc-bridge', 'expected':True}, # VFIO dummy ISA/LPC bridge must have address 1f.0
    {'device':'vhost-scsi.*', 'expected':True},            # vhost-scsi: missing wwpn
    {'device':'vhost-vsock-device', 'expected':True},      # guest-cid property must be greater than 2
    {'device':'vhost-vsock-pci', 'expected':True},         # guest-cid property must be greater than 2
    {'device':'virtio-9p-ccw', 'expected':True},           # 9pfs device couldn't find fsdev with the id = NULL
    {'device':'virtio-9p-device', 'expected':True},        # 9pfs device couldn't find fsdev with the id = NULL
    {'device':'virtio-9p-pci', 'expected':True},           # 9pfs device couldn't find fsdev with the id = NULL
    {'device':'virtio-blk-ccw', 'expected':True},          # drive property not set
    {'device':'virtio-blk-device', 'expected':True},       # drive property not set
    {'device':'virtio-blk-device', 'expected':True},       # drive property not set
    {'device':'virtio-blk-pci', 'expected':True},          # drive property not set
    {'device':'virtio-crypto-ccw', 'expected':True},       # 'cryptodev' parameter expects a valid object
    {'device':'virtio-crypto-device', 'expected':True},    # 'cryptodev' parameter expects a valid object
    {'device':'virtio-crypto-pci', 'expected':True},       # 'cryptodev' parameter expects a valid object
    {'device':'virtio-input-host-device', 'expected':True}, # evdev property is required
    {'device':'virtio-input-host-pci', 'expected':True},   # evdev property is required
    {'device':'xen-pvdevice', 'expected':True},            # Device ID invalid, it must always be supplied
    {'device':'vhost-vsock-ccw', 'expected':True},         # guest-cid property must be greater than 2
    {'device':'ALTR.timer', 'expected':True},              # "clock-frequency" property must be provided
    {'device':'zpci', 'expected':True},                    # target must be defined
    {'device':'pnv-(occ|icp|lpc)', 'expected':True},       # required link 'xics' not found: Property '.xics' not found
    {'device':'powernv-cpu-.*', 'expected':True},          # pnv_core_realize: required link 'xics' not found: Property '.xics' not found

    # ioapic devices are already created by pc and will fail:
    {'machine':'q35|pc.*', 'device':'kvm-ioapic', 'expected':True}, # Only 1 ioapics allowed
    {'machine':'q35|pc.*', 'device':'ioapic', 'expected':True},     # Only 1 ioapics allowed

    # "spapr-cpu-core needs a pseries machine"
    {'machine':'(?!pseries).*', 'device':'.*-spapr-cpu-core', 'expected':True},

    # KVM-specific devices shouldn't be tried without accel=kvm:
    {'accel':'(?!kvm).*', 'device':'kvmclock', 'expected':True},
    {'accel':'(?!kvm).*', 'device':'kvm-pci-assign', 'expected':True},

    # xen-specific machines and devices:
    {'accel':'(?!xen).*', 'machine':'xen.*', 'expected':True},
    {'accel':'(?!xen).*', 'device':'xen-.*', 'expected':True},

    # this fails on some machine-types, but not all, so they don't have expected=True:
    {'device':'vmgenid'}, # vmgenid requires DMA write support in fw_cfg, which this machine type does not provide

    # Silence INFO messages for errors that are common on multiple
    # devices/machines:
    {'log':r"No '[\w-]+' bus found for device '[\w-]+'"},
    {'log':r"images* must be given with the 'pflash' parameter"},
    {'log':r"(Guest|ROM|Flash|Kernel) image must be specified"},
    {'log':r"[cC]ould not load [\w ]+ (BIOS|bios) '[\w-]+\.bin'"},
    {'log':r"Couldn't find rom image '[\w-]+\.bin'"},
    {'log':r"speed mismatch trying to attach usb device"},
    {'log':r"Can't create a second ISA bus"},
    {'log':r"duplicate fw_cfg file name"},
    # sysbus-related error messages: most machines reject most dynamic sysbus devices:
    {'log':r"Option '-device [\w.,-]+' cannot be handled by this machine"},
    {'log':r"Device [\w.,-]+ is not supported by this machine yet"},
    {'log':r"Device [\w.,-]+ can not be dynamically instantiated"},
    {'log':r"Platform Bus: Can not fit MMIO region of size "},
    # other more specific errors we will ignore:
    {'device':'.*-spapr-cpu-core', 'log':r"CPU core type should be"},
    {'log':r"MSI(-X)? is not supported by interrupt controller"},
    {'log':r"pxb-pcie? devices cannot reside on a PCIe? bus"},
    {'log':r"Ignoring smp_cpus value"},
    {'log':r"sd_init failed: Drive 'sd0' is already in use because it has been automatically connected to another device"},
    {'log':r"This CPU requires a smaller page size than the system is using"},
    {'log':r"MSI-X support is mandatory in the S390 architecture"},
    {'log':r"rom check and register reset failed"},
    {'log':r"Unable to initialize GIC, CPUState for CPU#0 not valid"},
    {'log':r"Multiple VT220 operator consoles are not supported"},
    {'log':r"core 0 already populated"},
    {'log':r"could not find stage1 bootloader"},

    # other exitcode=1 failures not listed above will just generate INFO messages:
    {'exitcode':1, 'loglevel':logging.INFO},

    # KNOWN CRASHES:
    # Known crashes will generate error messages, but won't be fatal.
    # Those entries must be removed once we fix the crashes.
    {'exitcode':-6, 'log':r"Device 'serial0' is in use", 'loglevel':logging.ERROR},
    {'exitcode':-6, 'log':r"spapr_rtas_register: Assertion .*rtas_table\[token\]\.name.* failed", 'loglevel':logging.ERROR},
    {'exitcode':-6, 'log':r"qemu_net_client_setup: Assertion `!peer->peer' failed", 'loglevel':logging.ERROR},
    {'exitcode':-6, 'log':r'RAMBlock "[\w.-]+" already registered', 'loglevel':logging.ERROR},
    {'exitcode':-6, 'log':r"find_ram_offset: Assertion `size != 0' failed.", 'loglevel':logging.ERROR},
    {'exitcode':-6, 'log':r"puv3_load_kernel: Assertion `kernel_filename != NULL' failed", 'loglevel':logging.ERROR},
    {'exitcode':-6, 'log':r"add_cpreg_to_hashtable: code should not be reached", 'loglevel':logging.ERROR},
    {'exitcode':-6, 'log':r"qemu_alloc_display: Assertion `surface->image != NULL' failed", 'loglevel':logging.ERROR},
    {'exitcode':-6, 'log':r"Unexpected error in error_set_from_qdev_prop_error", 'loglevel':logging.ERROR},
    {'exitcode':-6, 'log':r"Object .* is not an instance of type spapr-machine", 'loglevel':logging.ERROR},
    {'exitcode':-6, 'log':r"Object .* is not an instance of type generic-pc-machine", 'loglevel':logging.ERROR},
    {'exitcode':-6, 'log':r"Object .* is not an instance of type e500-ccsr", 'loglevel':logging.ERROR},
    {'exitcode':-6, 'log':r"vmstate_register_with_alias_id: Assertion `!se->compat \|\| se->instance_id == 0' failed", 'loglevel':logging.ERROR},
    {'exitcode':-11, 'device':'stm32f205-soc', 'loglevel':logging.ERROR, 'expected':True},
    {'exitcode':-11, 'device':'xlnx,zynqmp', 'loglevel':logging.ERROR, 'expected':True},
    {'exitcode':-11, 'device':'mips-cps', 'loglevel':logging.ERROR, 'expected':True},
    {'exitcode':-11, 'device':'gus', 'loglevel':logging.ERROR, 'expected':True},
    {'exitcode':-11, 'device':'a9mpcore_priv', 'loglevel':logging.ERROR, 'expected':True},
    {'exitcode':-11, 'device':'a15mpcore_priv', 'loglevel':logging.ERROR, 'expected':True},
    {'exitcode':-11, 'device':'isa-serial', 'loglevel':logging.ERROR, 'expected':True},
    {'exitcode':-11, 'device':'sb16', 'loglevel':logging.ERROR, 'expected':True},
    {'exitcode':-11, 'device':'cs4231a', 'loglevel':logging.ERROR, 'expected':True},
    {'exitcode':-11, 'device':'arm-gicv3', 'loglevel':logging.ERROR, 'expected':True},
    {'exitcode':-11, 'machine':'isapc', 'device':'.*-iommu', 'loglevel':logging.ERROR, 'expected':True},

    # everything else (including SIGABRT and SIGSEGV) will be a fatal error:
    {'exitcode':None, 'fatal':True, 'loglevel':logging.FATAL},
]


def whitelistTestCaseMatch(wl, t):
    """Check if a test case specification can match a whitelist entry

    This only checks if a whitelist entry is a candidate match
    for a given test case, it won't check if the test case
    results/output match the entry.  See whitelistResultMatch().
    """
    return (('machine' not in wl or
             'machine' not in t or
             re.match(wl['machine'] + '$', t['machine'])) and
            ('accel' not in wl or
             'accel' not in t or
             re.match(wl['accel'] + '$', t['accel'])) and
            ('device' not in wl or
             'device' not in t or
             re.match(wl['device'] + '$', t['device'])))


def whitelistCandidates(t):
    """Generate the list of candidates that can match a test case"""
    for i, wl in enumerate(ERROR_WHITELIST):
        if whitelistTestCaseMatch(wl, t):
            yield (i, wl)


def findExpectedResult(t):
    """Check if there's an expected=True whitelist entry for a test case

    Returns (i, wl) tuple, where i is the index in
    ERROR_WHITELIST and wl is the whitelist entry itself.
    """
    for i, wl in whitelistCandidates(t):
        if wl.get('expected'):
            return (i, wl)


def whitelistResultMatch(wl, r):
    """Check if test case results/output match a whitelist entry

    It is valid to call this function only if
    whitelistTestCaseMatch() is True for the entry (e.g. on
    entries returned by whitelistCandidates())
    """
    assert whitelistTestCaseMatch(wl, r['testcase'])
    return ((wl.get('exitcode', 1) is None or
             r['exitcode'] == wl.get('exitcode', 1)) and
            ('log' not in wl or
             re.search(wl['log'], r['log'], re.MULTILINE)))


def checkResultWhitelist(r):
    """Look up whitelist entry for a given test case result

    Returns (i, wl) tuple, where i is the index in
    ERROR_WHITELIST and wl is the whitelist entry itself.
    """
    for i, wl in whitelistCandidates(r['testcase']):
        if whitelistResultMatch(wl, r):
            return i, wl

    raise Exception("this should never happen")


def qemuOptsEscape(s):
    """Escape option value QemuOpts"""
    return s.replace(",", ",,")


def formatTestCase(t):
    """Format test case info as "key=value key=value" for prettier logging output"""
    return ' '.join('%s=%s' % (k, v) for k, v in t.items())


def qomListTypeNames(vm, **kwargs):
    """Run qom-list-types QMP command, return type names"""
    types = vm.command('qom-list-types', **kwargs)
    return [t['name'] for t in types]


def infoQDM(vm):
    """Parse 'info qdm' output"""
    args = {'command-line': 'info qdm'}
    devhelp = vm.command('human-monitor-command', **args)
    for l in devhelp.split('\n'):
        l = l.strip()
        if l == '' or l.endswith(':'):
            continue
        d = {'name': re.search(r'name "([^"]+)"', l).group(1),
             'no-user': (re.search(', no-user', l) is not None)}
        yield d


class QemuBinaryInfo(object):
    def __init__(self, binary, devtype):
        if devtype is None:
            devtype = 'device'

        self.binary = binary
        self._machine_info = {}

        dbg("devtype: %r", devtype)
        args = ['-S', '-machine', 'none,accel=kvm:tcg']
        dbg("querying info for QEMU binary: %s", binary)
        vm = QEMUMachine(binary=binary, args=args)
        vm.launch()
        try:
            self.alldevs = set(qomListTypeNames(vm, implements=devtype, abstract=False))
            # there's no way to query DeviceClass::user_creatable using QMP,
            # so use 'info qdm':
            self.no_user_devs = set([d['name'] for d in infoQDM(vm, ) if d['no-user']])
            self.machines = list(m['name'] for m in vm.command('query-machines'))
            self.user_devs = self.alldevs.difference(self.no_user_devs)
            self.kvm_available = vm.command('query-kvm')['enabled']
        finally:
            vm.shutdown()

    def machineInfo(self, machine):
        """Query for information on a specific machine-type

        Results are cached internally, in case the same machine-
        type is queried multiple times.
        """
        if machine in self._machine_info:
            return self._machine_info[machine]

        mi = {}
        args = ['-S', '-machine', '%s' % (machine)]
        dbg("querying machine info for binary=%s machine=%s", self.binary, machine)
        vm = QEMUMachine(binary=self.binary, args=args)
        try:
            vm.launch()
            mi['runnable'] = True
        except KeyboardInterrupt:
            raise
        except:
            dbg("exception trying to run binary=%s machine=%s", self.binary, machine, exc_info=sys.exc_info())
            dbg("log: %r", vm.get_log())
            mi['runnable'] = False

        vm.shutdown()
        self._machine_info[machine] = mi
        return mi


BINARY_INFO = {}


def getBinaryInfo(args, binary):
    if binary not in BINARY_INFO:
        BINARY_INFO[binary] = QemuBinaryInfo(binary, args.devtype)
    return BINARY_INFO[binary]


def checkOneCase(args, testcase):
    """Check one specific case

    Returns a dictionary containing failure information on error,
    or None on success
    """
    binary = testcase['binary']
    accel = testcase['accel']
    machine = testcase['machine']
    device = testcase['device']

    dbg("will test: %r", testcase)

    args = ['-S', '-machine', '%s,accel=%s' % (machine, accel),
            '-device', qemuOptsEscape(device)]
    cmdline = ' '.join([binary] + args)
    dbg("will launch QEMU: %s", cmdline)
    vm = QEMUMachine(binary=binary, args=args)

    exc_traceback = None
    try:
        vm.launch()
    except KeyboardInterrupt:
        raise
    except:
        exc_traceback = traceback.format_exc()
        dbg("Exception while running test case")
    finally:
        vm.shutdown()
        ec = vm.exitcode()
        log = vm.get_log()

    if exc_traceback is not None or ec != 0:
        return {'exc_traceback':exc_traceback,
                'exitcode':ec,
                'log':log,
                'testcase':testcase,
                'cmdline':cmdline}


def binariesToTest(args, testcase):
    if args.qemu:
        r = args.qemu
    else:
        r = glob.glob('./*-softmmu/qemu-system-*')
    return r


def accelsToTest(args, testcase):
    if getBinaryInfo(args, testcase['binary']).kvm_available:
        yield 'kvm'
    yield 'tcg'


def machinesToTest(args, testcase):
    return getBinaryInfo(args, testcase['binary']).machines


def devicesToTest(args, testcase):
    return getBinaryInfo(args, testcase['binary']).user_devs


TESTCASE_VARIABLES = [
    ('binary', binariesToTest),
    ('accel', accelsToTest),
    ('machine', machinesToTest),
    ('device', devicesToTest),
]


def genCases1(args, testcases, var, fn):
    """Generate new testcases for one variable

    If an existing item already has a variable set, don't
    generate new items and just return it directly. This
    allows the "-t" command-line option to be used to choose
    a specific test case.
    """
    for testcase in testcases:
        if var in testcase:
            yield testcase.copy()
        else:
            for i in fn(args, testcase):
                t = testcase.copy()
                t[var] = i
                yield t


def genCases(args, testcase):
    """Generate test cases for all variables
    """
    cases = [testcase.copy()]
    for var, fn in TESTCASE_VARIABLES:
        dbg("var: %r, fn: %r", var, fn)
        cases = genCases1(args, cases, var, fn)
    return cases


def casesToTest(args, testcase):
    cases = genCases(args, testcase)
    if args.random:
        cases = list(cases)
        cases = random.sample(cases, min(args.random, len(cases)))
    if args.debug:
        cases = list(cases)
        dbg("%d test cases to test", len(cases))
    if args.shuffle:
        cases = list(cases)
        random.shuffle(cases)
    return cases


def logFailure(f, level):
    t = f['testcase']
    logger.log(level, "failed: %s", formatTestCase(t))
    logger.log(level, "cmdline: %s", f['cmdline'])
    for l in f['log'].strip().split('\n'):
        logger.log(level, "log: %s", l)
    logger.log(level, "exit code: %r", f['exitcode'])
    if f['exc_traceback']:
        logger.log(level, "exception:")
        for l in f['exc_traceback'].split('\n'):
            logger.log(level, "  %s", l.rstrip('\n'))


def main():
    parser = argparse.ArgumentParser(description="QEMU -device crash test")
    parser.add_argument('-t', metavar='KEY=VALUE', nargs='*',
                        help="Limit test cases to KEY=VALUE",
                        action='append', dest='testcases', default=[])
    parser.add_argument('-d', '--debug', action='store_true',
                        help='debug output')
    parser.add_argument('-v', '--verbose', action='store_true', default=True,
                        help='verbose output')
    parser.add_argument('-q', '--quiet', dest='verbose', action='store_false',
                        help='non-verbose output')
    parser.add_argument('-r', '--random', type=int, metavar='COUNT',
                        help='run a random sample of COUNT test cases',
                        default=0)
    parser.add_argument('--shuffle', action='store_true',
                        help='Run test cases in random order')
    parser.add_argument('--dry-run', action='store_true',
                        help="Don't run any tests, just generate list")
    parser.add_argument('-D', '--devtype', metavar='TYPE',
                        help="Test only device types that implement TYPE")
    parser.add_argument('-Q', '--quick', action='store_true', default=True,
                        help="Quick mode: skip test cases that are expected to fail")
    parser.add_argument('-F', '--full', action='store_false', dest='quick',
                        help="Full mode: test cases that are expected to fail")
    parser.add_argument('--strict', action='store_true', dest='strict',
                        help="Treat all warnings as fatal")
    parser.add_argument('qemu', nargs='*', metavar='QEMU',
                        help='QEMU binary to run')
    args = parser.parse_args()

    if args.debug:
        lvl = logging.DEBUG
    elif args.verbose:
        lvl = logging.INFO
    else:
        lvl = logging.WARN
    logging.basicConfig(stream=sys.stdout, level=lvl, format='%(levelname)s: %(message)s')

    fatal_failures = []
    wl_stats = {}
    skipped = 0
    total = 0

    tc = {}
    dbg("testcases: %r", args.testcases)
    if args.testcases:
        for t in chain(*args.testcases):
            for kv in t.split():
                k, v = kv.split('=', 1)
                tc[k] = v

    if len(binariesToTest(args, tc)) == 0:
        print >>sys.stderr, "No QEMU binary found"
        parser.print_usage(sys.stderr)
        return 1

    for t in casesToTest(args, tc):
        logger.info("running test case: %s", formatTestCase(t))
        total += 1

        expected_match = findExpectedResult(t)
        if (args.quick and
                (expected_match or
                 not getBinaryInfo(args, t['binary']).machineInfo(t['machine'])['runnable'])):
            dbg("skipped: %s", formatTestCase(t))
            skipped += 1
            continue

        if args.dry_run:
            continue

        try:
            f = checkOneCase(args, t)
        except KeyboardInterrupt:
            break

        if f:
            i, wl = checkResultWhitelist(f)
            dbg("testcase: %r, whitelist match: %r", t, wl)
            wl_stats.setdefault(i, []).append(f)
            level = wl.get('loglevel', logging.DEBUG)
            logFailure(f, level)
            if wl.get('fatal') or (args.strict and level >= logging.WARN):
                fatal_failures.append(f)
        else:
            dbg("success: %s", formatTestCase(t))
            if expected_match:
                logger.warn("Didn't fail as expected: %s", formatTestCase(t))

    logger.info("Total: %d test cases", total)
    if skipped:
        logger.info("Skipped %d test cases", skipped)

    if args.debug:
        stats = sorted([(len(wl_stats.get(i, [])), wl) for i, wl in enumerate(ERROR_WHITELIST)])
        for count, wl in stats:
            dbg("whitelist entry stats: %d: %r", count, wl)

    if fatal_failures:
        for f in fatal_failures:
            t = f['testcase']
            logger.error("Fatal failure: %s", formatTestCase(t))
        logger.error("Fatal failures on some machine/device combinations")
        return 1

if __name__ == '__main__':
    sys.exit(main())