mutter/src/tests/mutter_dbusrunner.py
Jonas Ådahl bd2fa92c29 thread: Support making threads real time scheduled
Real time scheduling is needed for better control of when we commit
updates to the kernel, so add a property to MetaThread that, if the
thread implementation uses a kernel thread and not a user thread, RTKit
is asked to make the thread real time scheduled using the maximum
priority allowed.

Currently RTKit doesn't support the GetAll() D-Bus properties method, so
some fall back code is added, as GDBusProxy depends on GetAll() working
to make the cached properties up to date. Once
https://github.com/heftig/rtkit/pull/30 lands and becomes widely
available in distributions, the work around can be dropped.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2777>
2023-07-17 21:19:34 +02:00

221 lines
7.1 KiB
Python

#!/usr/bin/env python3
import dbus
import sys
import os
import fcntl
import subprocess
import getpass
import argparse
from collections import OrderedDict
from dbusmock import DBusTestCase
from dbus.mainloop.glib import DBusGMainLoop
from pathlib import Path
def get_subprocess_stdout():
if os.getenv('META_DBUS_RUNNER_VERBOSE') == '1':
return sys.stderr
else:
return subprocess.DEVNULL;
class MutterDBusRunner(DBusTestCase):
@classmethod
def __get_templates_dir(klass):
return os.path.join(os.path.dirname(__file__), 'dbusmock-templates')
@classmethod
def setUpClass(klass, enable_kvm, launch):
klass.templates_dirs = [klass.__get_templates_dir()]
klass.mocks = OrderedDict()
print('Starting D-Bus daemons (session & system)...', file=sys.stderr)
DBusTestCase.setUpClass()
klass.start_session_bus()
klass.start_system_bus()
print('Launching required services...', file=sys.stderr)
klass.service_processes = []
for service in launch:
klass.service_processes += [subprocess.Popen(service)]
print('Starting mocked services...', file=sys.stderr)
(klass.mocks_manager, klass.mock_obj) = klass.start_from_local_template(
'meta-mocks-manager', {'templates-dir': klass.__get_templates_dir()})
klass.start_from_local_template('localed')
klass.start_from_local_template('colord')
klass.start_from_local_template('gsd-color')
klass.start_from_local_template('rtkit')
klass.system_bus_con = klass.get_dbus(system_bus=True)
klass.session_bus_con = klass.get_dbus(system_bus=False)
klass.init_logind(enable_kvm)
if klass.session_bus_con.name_has_owner('org.gnome.Mutter.DisplayConfig'):
raise Exception(
'org.gnome.Mutter.DisplayConfig already has owner on the session bus, bailing')
@classmethod
def tearDownClass(klass):
klass.mock_obj.Cleanup()
for (mock_server, mock_obj) in reversed(klass.mocks.values()):
mock_server.terminate()
mock_server.wait()
for process in klass.service_processes:
process.terminate()
process.wait()
DBusTestCase.tearDownClass()
@classmethod
def start_from_template(klass, template, params={}, system_bus=None):
mock_server, mock_obj = \
klass.spawn_server_template(template,
params,
get_subprocess_stdout(),
system_bus=system_bus)
mocks = (mock_server, mock_obj)
return mocks
@classmethod
def start_from_local_template(klass, template_file_name, params={}, system_bus=None):
template = klass.find_template(template_file_name)
return klass.start_from_template(template, params, system_bus=system_bus)
@classmethod
def start_from_template_managed(klass, template):
klass.mock_obj.StartFromTemplate(template)
@classmethod
def start_from_local_template_managed(klass, template_file_name):
template = klass.find_template(template_file_name)
klass.mock_obj.StartFromLocalTemplate(template)
@classmethod
def start_from_class(klass, mock_class, params={}):
mock_server = \
klass.spawn_server(mock_class.BUS_NAME,
mock_class.MAIN_OBJ,
mock_class.MAIN_IFACE,
mock_class.SYSTEM_BUS,
stdout=get_subprocess_stdout())
bus = klass.get_dbus(system_bus=mock_class.SYSTEM_BUS)
mock_obj = bus.get_object(mock_class.BUS_NAME, mock_class.MAIN_OBJ)
mock_class.load(mock_obj, params)
mocks = (mock_server, mock_obj)
return mocks
@classmethod
def init_logind_kvm(klass, session_path):
session_obj = klass.system_bus_con.get_object('org.freedesktop.login1', session_path)
session_obj.AddMethod('org.freedesktop.login1.Session',
'TakeDevice',
'uu', 'hb',
'''
import re
major = args[0]
minor = args[1]
sysfs_uevent_path = '/sys/dev/char/{}:{}/uevent'.format(major, minor)
sysfs_uevent = open(sysfs_uevent_path, 'r')
devname = None
for line in sysfs_uevent.readlines():
match = re.match('DEVNAME=(.*)', line)
if match:
devname = match[1]
break
sysfs_uevent.close()
if not devname:
raise dbus.exceptions.DBusException(f'Device file {major}:{minor} doesn\\\'t exist',
major=major, minor=minor)
fd = os.open('/dev/' + devname, os.O_RDWR | os.O_CLOEXEC)
unix_fd = dbus.types.UnixFd(fd)
os.close(fd)
ret = (unix_fd, False)
''')
session_obj.AddMethods('org.freedesktop.login1.Session', [
('ReleaseDevice', 'uu', '', ''),
('TakeControl', 'b', '', ''),
])
@classmethod
def init_logind(klass, enable_kvm):
logind = klass.start_from_template('logind')
[p_mock, obj] = logind
mock_iface = 'org.freedesktop.DBus.Mock'
obj.AddSeat('seat0', dbus_interface=mock_iface)
session_path = obj.AddSession('dummy', 'seat0',
dbus.types.UInt32(os.getuid()),
getpass.getuser(),
True,
dbus_interface=mock_iface)
if enable_kvm:
klass.init_logind_kvm(session_path)
@classmethod
def add_template_dir(klass, templates_dir):
klass.templates_dirs += [templates_dir]
@classmethod
def find_template(klass, template_name):
for templates_dir in klass.templates_dirs:
template_path = os.path.join(templates_dir, template_name + '.py')
template_file = Path(template_path)
if template_file.is_file():
return template_path
raise FileNotFoundError(f'Couldnt find a {template_name} template')
def wrap_call(self, args):
env = {}
env.update(os.environ)
env['NO_AT_BRIDGE'] = '1'
env['GTK_A11Y'] = 'none'
env['GSETTINGS_BACKEND'] = 'memory'
wrapper = env.get('META_DBUS_RUNNER_WRAPPER')
if wrapper == 'gdb':
args = ['gdb', '-ex', 'r', '-ex', 'bt full', '--args'] + args
elif wrapper:
args = wrapper.split(' ') + args
p = subprocess.Popen(args, env=env)
return p.wait()
def meta_run(klass):
DBusGMainLoop(set_as_default=True)
parser = argparse.ArgumentParser()
parser.add_argument('--kvm', action='store_true', default=False)
parser.add_argument('--launch', action='append', default=[])
(args, rest) = parser.parse_known_args(sys.argv)
rest.pop(0)
if rest[0] == '--':
rest.pop(0)
klass.setUpClass(args.kvm, args.launch)
runner = klass()
runner.assertGreater(len(rest), 0)
result = 1
try:
print('Running test case...', file=sys.stderr)
result = runner.wrap_call(rest)
finally:
MutterDBusRunner.tearDownClass()
return result