scripts: Test script to look for -device crashes

Test code to check if we can crash QEMU using -device. It will
test all accel/machine/device combinations by default, which may
take a few hours (it's more than 90k test cases). There's a "-r"
option that makes it test a random sample of combinations.

The scripts contains a whitelist for: 1) known error messages
that make QEMU exit cleanly; 2) known QEMU crashes.

This is the behavior when the script finds a failure:

* Known clean (exitcode=1) errors generate DEBUG messages
  (hidden by default)
* Unknown clean (exitcode=1) errors will generate INFO messages
  (visible by default)
* Known crashes generate error messages, but are not fatal
  (unless --strict mode is used)
* Unknown crashes generate fatal error messages

Having an updated whitelist of known clean errors is useful to make the
script less verbose and run faster when in --quick mode, but the
whitelist doesn't need to be always up to date.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20170526181200.17227-4-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

1 files changed, 624 insertions, 0 deletions

diff --git a/scripts/device-crash-test b/scripts/device-crash-test
new file mode 100755
index 0000000..5f90e9b
--- /dev/null
+++ b/scripts/device-crash-test
@@ -0,0 +1,624 @@
+#!/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
+
+    # 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':'allwinner-a10', 'log':"Unsupported NIC model:"},
+    {'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())