iwd/tools/run-tests

#!/usr/bin/python3

import os
import shutil
import sys
import subprocess
import atexit
import time
import unittest
import importlib
from unittest.result import TestResult
import multiprocessing
import re
import traceback

from configparser import ConfigParser
from prettytable import PrettyTable
from termcolor import colored
from glob import glob
from collections import namedtuple
import dbus.mainloop.glib
from gi.repository import GLib

from runner import Runner
from utils import Process, Namespace, BarChart

config = None
intf_id = 0

dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)

def dbg(*s, **kwargs):
	'''
		Allows prints if stdout has been re-directed
	'''
	print(*s, **kwargs, file=sys.__stdout__)

def write_results(file, results):
	with open(file, 'w') as f:
		for test, results in results.items():
			if results.failures != 0 or results.errors != 0:
				f.write('%s:FAIL\n' % test)
			else:
				f.write('%s:PASS\n' % test)

def exit_vm():
	if config:
		for p in Process.get_all():
			print("Process %s still running!" % p.args[0])
			p.kill()

		if config.ctx and config.ctx.results:
			success = print_results(config.ctx.results, int(config.ctx.args.timeout))

			if config.ctx.args.result:
				write_results(config.ctx.args.result, config.ctx.results)

	os.sync()

	runner.stop()

class Interface:
	def __init__(self, name, config, ns):
		self.name = name
		self.ctrl_interface = '/var/run/hostapd/' + name
		self.config = config
		self.ns = ns

	def __del__(self):
		Process(['iw', 'dev', self.name, 'del'], namespace=self.ns.name).wait()

	def set_interface_state(self, state):
		Process(['ip', 'link', 'set', self.name, state], namespace=self.ns.name).wait()

class Radio:
	def __init__(self, name, default_ns, used_by='iwd'):
		self.name = name
		# hostapd will reset this if this radio is used by it
		self.use = used_by
		self.interface = None
		self.ns = default_ns

	def __del__(self):
		print("Removing radio %s" % self.name)
		self.interface = None

	def set_namespace(self, ns):
		self.ns = ns
		Process(['iw', 'phy', self.name, 'set', 'netns', 'name', ns.name]).wait()

	def create_interface(self, config, use):
		global intf_id

		ifname = 'wln%s' % intf_id

		intf_id += 1

		self.interface = Interface(ifname, config, self.ns)
		self.use = use

		Process(['iw', 'phy', self.name, 'interface', 'add', ifname,
				'type', 'managed'], namespace=self.ns.name).wait()

		return self.interface

	def __str__(self):
		ret = self.name + ':\n'
		ret += '\tUsed By: %s' % self.use
		if self.interface:
			ret += ' (%s)' % self.interface.name
		if self.ns is not None:
			ret += ' (ns=%s)' % self.ns.name

		ret += '\n'

		return ret

class VirtualRadio(Radio):
	'''
		A subclass of 'Radio' specific to mac80211_hwsim radios.

		TODO: Using D-Bus to create and destroy radios is more desirable
		than the command line.
	'''

	def __init__(self, name, default_ns, cfg=None):
		global config

		self.disable_cipher = None
		self.disable_iftype = None

		self.hwsim = config.hwsim.Hwsim()

		used_by = 'iwd'

		if cfg:
			self.disable_iftype = cfg.get('iftype_disable', None)
			self.disable_cipher = cfg.get('cipher_disable', None)
			used_by = cfg.get('reserve', 'iwd')

		self._radio = self.hwsim.radios.create(name, p2p_device=True,
					iftype_disable=self.disable_iftype,
					cipher_disable=self.disable_cipher)

		super().__init__(self._radio.name, default_ns, used_by)

	def __del__(self):
		super().__del__()

		# If the radio was moved into a namespace this will fail
		try:
			self._radio.remove()
		except:
			pass

		self._radio = None

	def __str__(self):
		ret = super().__str__()

		if self.disable_iftype:
			ret += '\tDisabled interface types: %s\n' % self.disable_iftype

		if self.disable_cipher:
			ret += '\tDisabled ciphers: %s\n' % self.disable_cipher

		ret += '\tPath: %s' % self._radio.path

		ret += '\n'

		return ret

class HostapdInstance:
	'''
		A single instance of hostapd. In reality all hostapd instances
		are started as a single process. This class just makes things
		convenient for communicating with one of the hostapd APs.
	'''
	def __init__(self, config, radio):
		self.radio = radio
		self.config = config
		self.cli = None

		self.intf = radio.create_interface(self.config, 'hostapd')
		self.intf.set_interface_state('up')

	def __del__(self):
		print("Removing HostapdInstance %s" % self.config)
		self.intf.set_interface_state('down')
		self.radio = None
		self.intf = None

	def __str__(self):
		ret = 'Hostapd (%s)\n' % self.intf.name
		ret += '\tConfig: %s\n' % self.config

		return ret

class Hostapd:
	'''
		A set of running hostapd instances. This is really just a single
		process since hostapd can be started with multiple config files.
	'''
	def __init__(self, ns, radios, configs, radius):
		if len(configs) != len(radios):
			raise Exception("Config (%d) and radio (%d) list length not equal" % \
						(len(configs), len(radios)))

		print("Initializing hostapd instances")

		Process(['ip', 'link', 'set', 'eth0', 'up']).wait()
		Process(['ip', 'link', 'set', 'eth1', 'up']).wait()

		self.ns = ns
		self.global_ctrl_iface = '/var/run/hostapd/ctrl' + (str(ns.name) if ns.name else 'main')
		self.instances = [HostapdInstance(c, r) for c, r in zip(configs, radios)]

		ifaces = [rad.interface.name for rad in radios]
		ifaces = ','.join(ifaces)

		args = ['hostapd', '-g', self.global_ctrl_iface]

		if ifaces:
			args.extend(['-i', ifaces])

		#
		# Config files should already be present in /tmp. This appends
		# ctrl_interface and does any variable replacement. Currently
		# this is just any $ifaceN occurrences.
		#
		for c in configs:
			full_path = '/tmp/%s' % c
			args.append(full_path)

			self._rewrite_config(full_path)

		if radius:
			args.append(radius)

		if Process.is_verbose('hostapd'):
			args.append('-d')

		self.process = Process(args, namespace=ns.name)

		self.process.wait_for_socket(self.global_ctrl_iface, 30)

		for hapd in self.instances:
			self.process.wait_for_socket(hapd.intf.ctrl_interface, 30)

	def attach_cli(self):
		global config

		for hapd in self.instances:
			hapd.cli = config.hostapd.HostapdCLI(config=hapd.config)

	def _rewrite_config(self, config):
		'''
			Replaces any $ifaceN values with the correct interface
			names as well as appends the ctrl_interface path to
			the config file.
		'''
		with open(config, 'r+') as f:
			data = f.read()
			to_replace = []
			for match in re.finditer(r'\$iface[0-9]+', data):
				tag = data[match.start():match.end()]
				idx = tag.split('iface')[1]

				to_replace.append((tag, self.instances[int(idx)].intf.name))

			for r in to_replace:
				data = data.replace(r[0], r[1], 1)

			data += '\nctrl_interface=/var/run/hostapd\n'

			f.write(data)

	def __getitem__(self, config):
		if not config:
			return self.instances[0]

		for hapd in self.instances:
			if hapd.config == config:
				return hapd

		return None

	def __del__(self):
		print("Removing Hostapd")
		try:
			os.remove(self.global_ctrl_iface)
		except:
			print("Failed to remove %s" % self.global_ctrl_iface)

		for hapd in self.instances:
			GLib.source_remove(hapd.cli.io_watch)

		# Hostapd may have already been stopped
		if self.process:
			self.process.kill()

		# Hostapd creates simdb sockets for EAP-SIM/AKA tests but does not
		# clean them up.
		for f in glob("/tmp/eap_sim_db*"):
			os.remove(f)

class TestContext(Namespace):
	'''
		Contains all information for a given set of tests being run
		such as processes, radios, interfaces and test results.
	'''
	def __init__(self, args):
		self.name = None
		self.args = args
		self.hw_config = None
		self.hostapd = None
		self.wpas_interfaces = None
		self.radios = []
		self.results = {}
		self.namespaces = []
		self._last_mem_available = 0
		self._mem_chart = BarChart()

	def start_dbus_monitor(self):
		if not Process.is_verbose('dbus-monitor'):
			return

		self.start_process(['dbus-monitor', '--address', self.dbus_address])

	def start_haveged(self):
		self.start_process(['haveged', '-F'])

	def create_radios(self):
		setup = self.hw_config['SETUP']
		nradios = int(setup['num_radios'])
		args = ['hwsim']

		if self.hw_config['SETUP'].get('hwsim_medium', 'no') in ['no', '0', 'false']:
			# register hwsim as medium
			args.extend(['--no-register'])

		proc = self.start_process(args)
		proc.wait_for_service(self, 'net.connman.hwsim', 20)

		for i in range(nradios):
			name = 'rad%u' % i

			# Get any [radX] sections. These are for configuring
			# any special radios. This no longer requires a
			# radio_conf list, we just assume radios start rad0
			# and increment.
			rad_config = None
			if self.hw_config.has_section(name):
				rad_config = self.hw_config[name]

			self.radios.append(VirtualRadio(name, self, rad_config))

	def discover_radios(self):
		import pyroute2

		phys = []

		try:
			iw = pyroute2.iwutil.IW()
		except:
			iw = pyroute2.IW()

		attrs = [phy['attrs'] for phy in iw.list_wiphy()]

		for attr in attrs:
			for key, value in attr:
				if key == 'NL80211_ATTR_WIPHY_NAME':
					if value not in phys:
						phys.append(value)
					break

		print('Discovered radios: %s' % str(phys))
		self.radios = [Radio(name, self) for name in phys]

	def start_radios(self):
		reg_domain = self.hw_config['SETUP'].get('reg_domain', None)
		if reg_domain:
			Process(['iw', 'reg', 'set', reg_domain]).wait()

		if self.args.hw:
			self.discover_radios()
		else:
			self.create_radios()

	def start_hostapd(self):
		if not 'HOSTAPD' in self.hw_config:
			return

		settings = self.hw_config['HOSTAPD']

		if self.args.hw:
			# Just grab the first N radios. It gets rather
			# complicated trying to map radX radios specified in
			# hw.conf so any passed through physical adapters are
			# just given to hostapd/IWD as they appear during
			# discovery.
			#
			# TODO: It may be desirable to map PCI/USB adapters to
			#       specific radX radios specified in the config but
			#       there are really 2 separate use cases here.
			#       1. You want to test a *specific* radio with IWD
			#          or hostapd. For this you would want radX
			#          to map to a specific radio
			#       2. You have many adapters in use to run multiple
			#          tests. In this case you would not care what
			#          was using each radio, just that there was
			#          enough to run all tests.
			hapd_configs = [conf for rad, conf in settings.items() if rad != 'radius_server']
			hapd_processes = [(self, self.radios[:len(hapd_configs)], hapd_configs)]
		else:
			hapd_processes = []
			for ns in [self] + self.namespaces:
				ns_radios = [rad for rad in ns.radios if rad.name in settings]
				if len(ns_radios):
					ns_configs = [settings[rad.name] for rad in ns_radios]
					hapd_processes.append((ns, ns_radios, ns_configs))
			if not hapd_processes:
				hapd_processes.append((self, [], []))

		radius_config = settings.get('radius_server', None)

		self.hostapd = [Hostapd(ns, radios, configs, radius_config)
				for ns, radios, configs in hapd_processes]

		for hapd in self.hostapd:
			hapd.attach_cli()

	def get_frequencies(self):
		frequencies = []

		for hapd in self.hostapd:
			frequencies += [instance.cli.frequency for instance in hapd.instances]

		return frequencies

	def get_hapd_instance(self, config=None):
		instances = [i for hapd in self.hostapd for i in hapd.instances]

		if config is None:
			return instances[0]

		for hapd in instances:
			if hapd.config == config:
				return hapd

	def start_wpas_interfaces(self):
		if 'WPA_SUPPLICANT' not in self.hw_config:
			return

		if not shutil.which('wpa_supplicant'):
			print('wpa_supplicant not found, dependent tests will be skipped')
			return

		settings = self.hw_config['WPA_SUPPLICANT']

		if self.args.hw:
			nradios = len(settings.items())

			wpas_radios = self.radios[:nradios]
			self.wpas_interfaces = []

			#
			# Physical radios most likely will use a different name
			# than 'rad#' but the config file is referenced by these
			# 'rad#' names. Iterate through both the settings and
			# physical radios to create interfaces associated with
			# each config file.
			#
			for vrad, hwrad in zip(settings.items(), wpas_radios):
				self.wpas_interfaces.append(hwrad.create_interface(vrad[1], 'wpas'))

		else:
			wpas_radios = [rad for rad in self.radios if rad.name in settings]
			self.wpas_interfaces = [rad.create_interface(settings[rad.name], 'wpas') \
						for rad in wpas_radios]

	def start_ofono(self):
		sim_keys = self.hw_config['SETUP'].get('sim_keys', None)
		if not sim_keys:
			print("Ofono not required")
			return
		elif sim_keys != 'ofono':
			os.environ['IWD_SIM_KEYS'] = sim_keys
			return

		if not shutil.which('ofonod') or not shutil.which('phonesim'):
			print("Ofono or Phonesim not found, skipping test")
			return

		os.environ['OFONO_PHONESIM_CONFIG'] = '/tmp/phonesim.conf'

		phonesim_args = ['phonesim', '-p', '12345', '/usr/share/phonesim/default.xml']

		self.start_process(phonesim_args)

		#
		# TODO:
		# Is there something to wait for? Without this phonesim rejects
		# connections on all but the fist test.
		#
		time.sleep(3)

		ofono_args = ['ofonod', '-n', '--plugin=atmodem,phonesim']
		if Process.is_verbose('ofonod'):
			ofono_args.append('-d')

		self.start_process(ofono_args)

		print("Ofono started")

	def create_namespaces(self):
		if not self.hw_config.has_section('NameSpaces'):
			return

		for key, value in self.hw_config.items('NameSpaces'):
			radio_names = value.split(',')
			# Gather up radio objects for this namespace
			radios = [rad for rad in self.radios if rad.name in radio_names]

			# Remove radios from 'root' namespace
			self.radios = list(set(self.radios) - set(radios))

			self.namespaces.append(Namespace(self.args, key, radios))

	def get_namespace(self, ns):
		for n in self.namespaces:
			if n.name == ns:
				return n

		return None

	def stop_test_processes(self):
		for n in self.namespaces:
			n.reset()

		self.namespaces = []
		self.hostapd = None
		self.wpas_interfaces = None

		self.reset()

	def meminfo_to_dict(self):
		def removesuffix(string, suffix):
			if string.endswith(suffix):
				return string[:-len(suffix)]
			return string

		ret = {}

		with open('/proc/meminfo', 'r') as f:
			data = f.read().strip().split('\n')

		for l in data:
			entry = l.split(':')
			ret[entry[0]] = int(removesuffix(entry[1], 'kB'))

		return ret

	def __str__(self):
		ret = 'Arguments:\n'
		for arg in vars(self.args):
			ret += '\t --%s %s\n' % (arg, str(getattr(self.args, arg)))

		if self.hostapd:
			for hapd in self.hostapd:
				ret += 'Hostapd (ns=%s):\n' % (hapd.ns.name,)
				for h in hapd.instances:
					ret += '\t%s\n' % (str(h),)
		else:
			ret += 'Hostapd:\n'
			ret += '\tNo Hostapd instances\n'

		info = self.meminfo_to_dict()
		self._mem_chart.add_value(info['MemAvailable'])

		ret += 'Available Memory: %u kB\n' % info['MemAvailable']
		ret += 'Last Test Delta: %+d kB\n' % (info['MemAvailable'] - self._last_mem_available)
		ret += 'Per-test Usage:\n'
		ret += str(self._mem_chart)

		self._last_mem_available = info['MemAvailable']

		ret += super().__str__()

		for n in self.namespaces:
			ret += n.__str__()

		return ret

def build_unit_list(args):
	'''
		Build list of unit tests based on passed arguments. This first
		checks for literal names provided in the arguments, then if
		no matches were found, checks for a glob match.
	'''
	tests = []
	test_root = args.testhome + '/unit'

	for unit in args.unit_tests.split(','):
		path = '%s/%s' % (test_root, unit)
		if os.access(unit, os.X_OK):
			tests.append(unit)
		elif os.access(path, os.X_OK):
			tests.append(path)
		else:
			# Full list or glob, first build up valid list of tests
			matches = glob(path)
			if matches == []:
				raise Exception("Could not find test %s" % unit)

			matches = [exe for exe in matches if os.access(exe, os.X_OK)]

			tests.extend(matches)

	return sorted(tests)

def build_test_list(args):
	'''
		Build list of auto test directories based on passed arguments.
		First check for absolute paths, then look in <iwd>/autotests,
		then glob match.
	'''
	tests = []
	test_root = args.testhome + '/autotests'

	# Run all tests
	if not args.autotests:
		# Get list of all autotests (committed in git)
		Process(['git', 'config', '--system', '--add', 'safe.directory',
					os.path.normpath(args.testhome)]).wait()
		tests = os.popen('git -C %s ls-files autotests/ | cut -f2 -d"/" \
					| grep "^test" | uniq' % args.testhome).read() \
					.strip().split('\n')
		tests = [test_root + '/' + t for t in tests]
	else:
		print("Generating partial test list")

		full_list = sorted(os.listdir(test_root))

		for t in args.autotests.split(','):
			path = '%s/%s' % (test_root, t)
			if t.endswith('+'):
				t = t.split('+')[0]
				i = full_list.index(t)

				tests = [test_root + '/' + x for x in full_list[i:] \
							if x.startswith('test')]
			elif os.path.exists(t):
				if t not in tests:
					tests.append(t)
			elif os.path.exists(path):
				if path not in tests:
					tests.append(path)
			else:
				matches = glob(path)
				if matches == []:
					raise Exception("Could not find test %s" % t)

				tests.extend(list(set(matches) - set(tests)))

	return sorted(tests)

SimpleResult = namedtuple('SimpleResult', 'run failures errors skipped time')

def start_test(ctx, subtests, rqueue):
	'''
		Run an individual test. 'subtests' are parsed prior to calling
		but these effectively make up a single test. 'rqueue' is the
		results queue which is required since this is using
		multiprocessing.
	'''
	run = 0
	errors = 0
	failures = 0
	skipped = 0

	start = time.time()
	#
	# Iterate through each individual python test.
	#
	for s in subtests:
		loader = unittest.TestLoader()
		try:
			module = importlib.import_module(os.path.splitext(s)[0])
		except OSError as e:
			dbg(subprocess.check_output("cat /proc/buddyinfo", shell=True).decode('utf-8'))
			dbg(subprocess.check_output("dmesg | tail -80", shell=True).decode('utf-8'))
			print(ctx)
			raise e

		subtest = loader.loadTestsFromModule(module)

		# The test suite is being (ab)used to get a bit more granularity
		# with individual tests. The 'normal' way to use unittest is to
		# just create a test suite and run them. The problem here is that
		# test results are queued and printed at the very end so its
		# difficult to know *where* a test failed (python gives a stack
		# trace but printing the exception/failure immediately shows
		# where in the debug logs something failed). More so if there are
		# several test functions inside a single python file they run
		# as a single test and it is difficult (again) to know where
		# something failed.

		# Iterating through each python test file
		for test in subtest:
			limit_funcs = []

			if ctx.args.sub_tests:
				for i in ctx.args.sub_tests:
					if len(i.split('.')) == 2:
						limit_funcs.append(i.split('.')[1])

			# Iterating through individual test functions inside a
			# Test() class. Due to the nature of unittest we have
			# to jump through some hoops to set up the test class
			# only once by turning the enumeration into a list, then
			# enumerating (again) to keep track of the index (just
			# enumerating the test class doesn't allow len() because
			# it is not a list).
			tlist = list(enumerate(test))
			for index, t in enumerate(tlist):
				# enumerate is returning a tuple, index 1 is our
				# actual object.
				t = t[1]

				func, file = str(t).split(' ')
				#
				# TODO: There may be a better way of doing this
				# but stringifying the test class gives us a string:
				# <function> (<file>.<class>)
				#
				file = file.strip('()').split('.')[0] + '.py'

				# Create an empty result here in case the test fails
				result = TestResult()

				try:
					skip = len(limit_funcs) > 0 and func not in limit_funcs

					# Set up class only on first test
					if index == 0:
						if not skip:
							dbg("%s\n\t%s RUNNING" % (file, str(func)), end='')
						t.setUpClass()
					else:
						if not skip:
							dbg("\t%s RUNNING" % str(func), end='')

					sys.__stdout__.flush()

					name = os.path.basename(os.getcwd())

					Process.write_separators(name, "\n====== %s:%s:%s ======\n\n" %
									(name, file, func))

					if not skip:
						# Run test (setUp/tearDown run automatically)
						result = t()

					# Tear down class only on last test
					if index == len(tlist) - 1:
						t.tearDownClass()

					if skip:
						continue
				except unittest.SkipTest as e:
					result.skipped.append(t)
				except Exception as e:
					dbg('\n%s threw an uncaught exception:' % func)
					traceback.print_exc(file=sys.__stdout__)

				run += result.testsRun
				errors += len(result.errors)
				failures += len(result.failures)
				skipped += len(result.skipped)

				if len(result.skipped) > 0:
					dbg(colored(" SKIPPED", "cyan"))
				elif run == 0 or len(result.errors) > 0 or len(result.failures) > 0:
					dbg(colored(" FAILED", "red"))
					for e in result.errors:
						dbg(e[1])
					for f in result.failures:
						dbg(f[1])
				else:
					dbg(colored(" PASSED", "green"))

		# Prevents future test modules with the same name (e.g.
		# connection_test.py) from being loaded from the cache
		sys.modules.pop(module.__name__)

	#
	# The multiprocessing queue is picky with what objects it will serialize
	# and send between processes. Because of this we put the important bits
	# of the result into our own 'SimpleResult' tuple.
	#
	sresult = SimpleResult(run=run, failures=failures, errors=errors,
				skipped=skipped, time=time.time() - start)
	rqueue.put(sresult)

	# This may not be required since we are manually popping sys.modules
	importlib.invalidate_caches()

def pre_test(ctx, test, copied):
	'''
		Copy test files, start processes, and any other pre test work.
	'''
	os.chdir(test)

	dbg("\nStarting %s" % colored(os.path.basename(test), "white", attrs=['bold']))
	if not os.path.exists(test + '/hw.conf'):
		raise Exception("No hw.conf found for %s" % test)

	ctx.hw_config = ConfigParser()
	ctx.hw_config.read(test + '/hw.conf')
	#
	# We have two types of test files: tests and everything else. Rather
	# than require each test to specify the files needing to be copied to
	# /tmp (previously 'tmpfs_extra_stuff'), we just copy everything which
	# isn't a test. There is really no reason not to do this as any file
	# present in a test directory should be needed by the test.
	#
	# All files
	files = os.listdir(test)
	# Tests (starts or ends with 'test')
	subtests = [f for f in files if f.startswith('test') or \
			os.path.splitext(f)[0].endswith('test')]
	# Everything else (except .py files)
	to_copy = [f for f in list(set(files) - set(subtests)) if not f.endswith('.py') \
								and f != '__pycache__']
	for f in to_copy:
		if os.path.isdir(f):
			shutil.copytree(f, '/tmp/' + f)
		else:
			shutil.copy(f, '/tmp')
		copied.append(f)

	# Prune down any subtests if needed
	if ctx.args.sub_tests:
		ctx.args.sub_tests = ctx.args.sub_tests.split(',')

		to_run = [x.split('.')[0] for x in ctx.args.sub_tests]
		pruned = []

		for s in subtests:
			no_ext = s
			# Handle <file>.<test function> format
			if '.' in s:
				no_ext = s.split('.')[0]

			if no_ext in to_run:
				pruned.append(no_ext + '.py')

		subtests = pruned

	if ctx.args.log:
		ctx.start_process(['iwmon', '--nowiphy'])
	elif ctx.args.monitor:
		ctx.start_process(['iwmon'], outfile=ctx.args.monitor)

	ctx.start_dbus()
	ctx.start_haveged()
	ctx.start_dbus_monitor()
	ctx.start_radios()
	ctx.create_namespaces()
	ctx.start_hostapd()
	ctx.start_wpas_interfaces()
	ctx.start_ofono()

	if ctx.hw_config.getboolean('SETUP', 'start_iwd', fallback=True):
		ctx.start_iwd()

	print(ctx)

	sys.path.insert(1, test)

	return sorted(subtests)

def post_test(ctx, to_copy):
	'''
		Remove copied files, and stop test processes.
	'''
	try:
		for f in to_copy:
			if os.path.isdir('/tmp/' + f):
				shutil.rmtree('/tmp/' + f)
			elif os.path.exists('/tmp/' + f):
				os.remove('/tmp/' + f)

	except Exception as e:
		print("Exception thrown in post_test")
	finally:
		ctx.stop_test_processes()

	if ctx.args.valgrind:
		for f in os.listdir('/tmp'):
			if not f.startswith("valgrind.log."):
				continue

			with open('/tmp/' + f, 'r') as v:
				result = v.read()

			# Don't print out the result if there were no issues
			if "0 errors from 0 contexts" not in result:
				dbg(result)
				dbg("\n")

			os.remove('/tmp/' + f)

	# Special case for when logging is enabled
	if os.path.isfile('/tmp/iwd-tls-debug-server-cert.pem'):
		os.remove('/tmp/iwd-tls-debug-server-cert.pem')

	allowed = ['phonesim.conf', 'certs', 'secrets', 'iwd']
	for f in [f for f in os.listdir('/tmp') if f not in allowed]:
		dbg("File %s was not cleaned up!" % f)
		try:
			os.remove('/tmp/' + f)
		except:
			pass

def print_results(results, max_timeout):
	table = PrettyTable(['Test', colored('Passed', 'green'), colored('Failed', 'red'), \
				colored('Skipped', 'cyan'), colored('Time', 'yellow')])

	total_pass = 0
	total_fail = 0
	total_skip = 0
	total_time = 0

	for test, result in results.items():

		if result.time == max_timeout:
			failed = "Timed out"
			passed = "Timed out"
		elif result.time == 0:
			failed = "Exception"
			passed = "Exception"
		else:
			failed = result.failures + result.errors
			passed = result.run - failed

			total_pass += passed
			total_fail += failed
			total_skip += result.skipped

		total_time += result.time

		time = '%.2f' % result.time

		table.add_row([test, colored(passed, 'green'), colored(failed, 'red'), \
				colored(result.skipped, 'cyan'), colored(time, 'yellow')])

	total_time = '%.2f' % total_time

	table.add_row(['Total', colored(total_pass, 'green'), colored(total_fail, 'red'), \
			colored(total_skip, 'cyan'), colored(total_time, 'yellow')])

	dbg(table)

	return total_fail == 0

def run_auto_tests(ctx, args):
	tests = build_test_list(args)

	for test in tests:
		copied = []
		try:
			subtests = pre_test(ctx, test, copied)

			if len(subtests) < 1:
				dbg("No tests to run")
				sys.exit()

			rqueue = multiprocessing.Queue()
			p = multiprocessing.Process(target=start_test, args=(ctx, subtests, rqueue))
			p.start()
			# Rather than time each subtest we just time the total but
			# multiply the default time by the number of tests being run.
			p.join(int(args.timeout) * len(subtests))

			if p.is_alive():
				# Timeout
				p.terminate()

				ctx.results[os.path.basename(test)] = SimpleResult(run=0,
								failures=0, errors=0,
								skipped=0, time=int(args.timeout))
			else:
				ctx.results[os.path.basename(test)] = rqueue.get()

		except Exception as ex:
			dbg("%s threw an uncaught exception" % test)
			traceback.print_exc(file=sys.__stdout__)
			ctx.results[os.path.basename(test)] = SimpleResult(run=0, failures=0,
								errors=0, skipped=0, time=0)
		finally:
			post_test(ctx, copied)

def run_unit_tests(ctx, args):
	os.chdir(args.testhome + '/unit')
	units = build_unit_list(args)

	for u in units:
		p = ctx.start_process([u]).wait()
		if p.returncode != 0:
			dbg("Unit test %s failed" % os.path.basename(u))
		else:
			dbg("Unit test %s passed" % os.path.basename(u))

def run_tests(args):
	global config

	os.chdir(args.testhome)

	#
	# This allows all autotest utils (iwd/hostapd/etc) to access the
	# TestContext. Any other module or script (in the same interpreter) can
	# simply import config.ctx and access all live test information,
	# start/stop processes, see active radios etc.
	#
	config = importlib.import_module('config')
	config.ctx = TestContext(args)

	# Must import these after config so ctx gets set
	config.hwsim = importlib.import_module('hwsim')
	config.hostapd = importlib.import_module('hostapd')

	# Start writing out kernel log
	config.ctx.start_process(["dmesg", '--follow'])

	if args.unit_tests is None:
		run_auto_tests(config.ctx, args)
	else:
		run_unit_tests(config.ctx, args)

runner = Runner()

atexit.register(exit_vm)
runner.prepare_environment()

if runner.args.start:
	ctx = TestContext(runner.args)
	ctx.start_dbus()
	os.chdir(runner.args.testhome)
	os.environ['DBUS_SYSTEM_BUS_ADDRESS'] = ctx.dbus_address

	subprocess.run([runner.args.start])
else:
	run_tests(runner.args)

runner.cleanup_environment()