# SPDX-License-Identifier: GPL-2.0## Runs UML kernel, collects output, and handles errors.## Copyright (C) 2019, Google LLC.# Author: Felix Guo <felixguoxiuping@gmail.com># Author: Brendan Higgins <brendanhiggins@google.com> import loggingimport subprocessimport osimport shutilimport signal from contextlib import ExitStack import kunit_configimport kunit_parser KCONFIG_PATH = '.config'KUNITCONFIG_PATH = '.kunitconfig'DEFAULT_KUNITCONFIG_PATH = 'arch/um/configs/kunit_defconfig'BROKEN_ALLCONFIG_PATH = 'tools/testing/kunit/configs/broken_on_uml.config'OUTFILE_PATH = 'test.log' def get_file_path(build_dir, default): if build_dir: default = os.path.join(build_dir, default) return default class ConfigError(Exception): """Represents an error trying to configure the Linux kernel.""" class BuildError(Exception): """Represents an error trying to build the Linux kernel.""" class LinuxSourceTreeOperations(object): """An abstraction over command line operations performed on a source tree.""" def make_mrproper(self): try: subprocess.check_output(['make', 'mrproper'], stderr=subprocess.STDOUT) except OSError as e: raise ConfigError('Could not call make command: ' + str(e)) except subprocess.CalledProcessError as e: raise ConfigError(e.output.decode()) def make_olddefconfig(self, build_dir, make_options): command = ['make', 'ARCH=um', 'olddefconfig'] if make_options: command.extend(make_options) if build_dir: command += ['O=' + build_dir] try: subprocess.check_output(command, stderr=subprocess.STDOUT) except OSError as e: raise ConfigError('Could not call make command: ' + str(e)) except subprocess.CalledProcessError as e: raise ConfigError(e.output.decode()) def make_allyesconfig(self, build_dir, make_options): kunit_parser.print_with_timestamp( 'Enabling all CONFIGs for UML...') command = ['make', 'ARCH=um', 'allyesconfig'] if make_options: command.extend(make_options) if build_dir: command += ['O=' + build_dir] process = subprocess.Popen( command, stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT) process.wait() kunit_parser.print_with_timestamp( 'Disabling broken configs to run KUnit tests...') with ExitStack() as es: config = open(get_kconfig_path(build_dir), 'a') disable = open(BROKEN_ALLCONFIG_PATH, 'r').read() config.write(disable) kunit_parser.print_with_timestamp( 'Starting Kernel with all configs takes a few minutes...') def make(self, jobs, build_dir, make_options): command = ['make', 'ARCH=um', '--jobs=' + str(jobs)] if make_options: command.extend(make_options) if build_dir: command += ['O=' + build_dir] try: proc = subprocess.Popen(command, stderr=subprocess.PIPE, stdout=subprocess.DEVNULL) except OSError as e: raise BuildError('Could not call make command: ' + str(e)) _, stderr = proc.communicate() if proc.returncode != 0: raise BuildError(stderr.decode()) if stderr: # likely only due to build warnings print(stderr.decode()) def linux_bin(self, params, timeout, build_dir): """Runs the Linux UML binary. Must be named 'linux'.""" linux_bin = get_file_path(build_dir, 'linux') outfile = get_outfile_path(build_dir) with open(outfile, 'w') as output: process = subprocess.Popen([linux_bin] + params, stdout=output, stderr=subprocess.STDOUT) process.wait(timeout) def get_kconfig_path(build_dir): return get_file_path(build_dir, KCONFIG_PATH) def get_kunitconfig_path(build_dir): return get_file_path(build_dir, KUNITCONFIG_PATH) def get_outfile_path(build_dir): return get_file_path(build_dir, OUTFILE_PATH) class LinuxSourceTree(object): """Represents a Linux kernel source tree with KUnit tests.""" def __init__(self): self._ops = LinuxSourceTreeOperations() signal.signal(signal.SIGINT, self.signal_handler) def clean(self): try: self._ops.make_mrproper() except ConfigError as e: logging.error(e) return False return True def create_kunitconfig(self, build_dir, defconfig=DEFAULT_KUNITCONFIG_PATH): kunitconfig_path = get_kunitconfig_path(build_dir) if not os.path.exists(kunitconfig_path): shutil.copyfile(defconfig, kunitconfig_path) def read_kunitconfig(self, build_dir): kunitconfig_path = get_kunitconfig_path(build_dir) self._kconfig = kunit_config.Kconfig() self._kconfig.read_from_file(kunitconfig_path) def validate_config(self, build_dir): kconfig_path = get_kconfig_path(build_dir) validated_kconfig = kunit_config.Kconfig() validated_kconfig.read_from_file(kconfig_path) if not self._kconfig.is_subset_of(validated_kconfig): invalid = self._kconfig.entries() - validated_kconfig.entries() message = 'Provided Kconfig is not contained in validated .config. Following fields found in kunitconfig, ' \ 'but not in .config: %s' % ( ', '.join([str(e) for e in invalid]) ) logging.error(message) return False return True def build_config(self, build_dir, make_options): kconfig_path = get_kconfig_path(build_dir) if build_dir and not os.path.exists(build_dir): os.mkdir(build_dir) self._kconfig.write_to_file(kconfig_path) try: self._ops.make_olddefconfig(build_dir, make_options) except ConfigError as e: logging.error(e) return False return self.validate_config(build_dir) def build_reconfig(self, build_dir, make_options): """Creates a new .config if it is not a subset of the .kunitconfig.""" kconfig_path = get_kconfig_path(build_dir) if os.path.exists(kconfig_path): existing_kconfig = kunit_config.Kconfig() existing_kconfig.read_from_file(kconfig_path) if not self._kconfig.is_subset_of(existing_kconfig): print('Regenerating .config ...') os.remove(kconfig_path) return self.build_config(build_dir, make_options) else: return True else: print('Generating .config ...') return self.build_config(build_dir, make_options) def build_um_kernel(self, alltests, jobs, build_dir, make_options): try: if alltests: self._ops.make_allyesconfig(build_dir, make_options) self._ops.make_olddefconfig(build_dir, make_options) self._ops.make(jobs, build_dir, make_options) except (ConfigError, BuildError) as e: logging.error(e) return False return self.validate_config(build_dir) def run_kernel(self, args=[], build_dir='', timeout=None): args.extend(['mem=1G']) self._ops.linux_bin(args, timeout, build_dir) outfile = get_outfile_path(build_dir) subprocess.call(['stty', 'sane']) with open(outfile, 'r') as file: for line in file: yield line def signal_handler(self, sig, frame): logging.error('Build interruption occurred. Cleaning console.') subprocess.call(['stty', 'sane'])
# SPDX-License-Identifier: GPL-2.0
#
# Runs UML kernel, collects output, and handles errors.
#
# Copyright (C) 2019, Google LLC.
# Author: Felix Guo <felixguoxiuping@gmail.com>
# Author: Brendan Higgins <brendanhiggins@google.com>
import logging
import subprocess
import os
import shutil
import signal
from contextlib import ExitStack
import kunit_config
import kunit_parser
KCONFIG_PATH = '.config'
KUNITCONFIG_PATH = '.kunitconfig'
DEFAULT_KUNITCONFIG_PATH = 'arch/um/configs/kunit_defconfig'
BROKEN_ALLCONFIG_PATH = 'tools/testing/kunit/configs/broken_on_uml.config'
OUTFILE_PATH = 'test.log'
def get_file_path(build_dir, default):
if build_dir:
default = os.path.join(build_dir, default)
return default
class ConfigError(Exception):
"""Represents an error trying to configure the Linux kernel."""
class BuildError(Exception):
"""Represents an error trying to build the Linux kernel."""
class LinuxSourceTreeOperations(object):
"""An abstraction over command line operations performed on a source tree."""
def make_mrproper(self):
try:
subprocess.check_output(['make', 'mrproper'], stderr=subprocess.STDOUT)
except OSError as e:
raise ConfigError('Could not call make command: ' + str(e))
except subprocess.CalledProcessError as e:
raise ConfigError(e.output.decode())
def make_olddefconfig(self, build_dir, make_options):
command = ['make', 'ARCH=um', 'olddefconfig']
if make_options:
command.extend(make_options)
if build_dir:
command += ['O=' + build_dir]
try:
subprocess.check_output(command, stderr=subprocess.STDOUT)
except OSError as e:
raise ConfigError('Could not call make command: ' + str(e))
except subprocess.CalledProcessError as e:
raise ConfigError(e.output.decode())
def make_allyesconfig(self, build_dir, make_options):
kunit_parser.print_with_timestamp(
'Enabling all CONFIGs for UML...')
command = ['make', 'ARCH=um', 'allyesconfig']
if make_options:
command.extend(make_options)
if build_dir:
command += ['O=' + build_dir]
process = subprocess.Popen(
command,
stdout=subprocess.DEVNULL,
stderr=subprocess.STDOUT)
process.wait()
kunit_parser.print_with_timestamp(
'Disabling broken configs to run KUnit tests...')
with ExitStack() as es:
config = open(get_kconfig_path(build_dir), 'a')
disable = open(BROKEN_ALLCONFIG_PATH, 'r').read()
config.write(disable)
kunit_parser.print_with_timestamp(
'Starting Kernel with all configs takes a few minutes...')
def make(self, jobs, build_dir, make_options):
command = ['make', 'ARCH=um', '--jobs=' + str(jobs)]
if make_options:
command.extend(make_options)
if build_dir:
command += ['O=' + build_dir]
try:
proc = subprocess.Popen(command,
stderr=subprocess.PIPE,
stdout=subprocess.DEVNULL)
except OSError as e:
raise BuildError('Could not call make command: ' + str(e))
_, stderr = proc.communicate()
if proc.returncode != 0:
raise BuildError(stderr.decode())
if stderr: # likely only due to build warnings
print(stderr.decode())
def linux_bin(self, params, timeout, build_dir):
"""Runs the Linux UML binary. Must be named 'linux'."""
linux_bin = get_file_path(build_dir, 'linux')
outfile = get_outfile_path(build_dir)
with open(outfile, 'w') as output:
process = subprocess.Popen([linux_bin] + params,
stdout=output,
stderr=subprocess.STDOUT)
process.wait(timeout)
def get_kconfig_path(build_dir):
return get_file_path(build_dir, KCONFIG_PATH)
def get_kunitconfig_path(build_dir):
return get_file_path(build_dir, KUNITCONFIG_PATH)
def get_outfile_path(build_dir):
return get_file_path(build_dir, OUTFILE_PATH)
class LinuxSourceTree(object):
"""Represents a Linux kernel source tree with KUnit tests."""
def __init__(self):
self._ops = LinuxSourceTreeOperations()
signal.signal(signal.SIGINT, self.signal_handler)
def clean(self):
try:
self._ops.make_mrproper()
except ConfigError as e:
logging.error(e)
return False
return True
def create_kunitconfig(self, build_dir, defconfig=DEFAULT_KUNITCONFIG_PATH):
kunitconfig_path = get_kunitconfig_path(build_dir)
if not os.path.exists(kunitconfig_path):
shutil.copyfile(defconfig, kunitconfig_path)
def read_kunitconfig(self, build_dir):
kunitconfig_path = get_kunitconfig_path(build_dir)
self._kconfig = kunit_config.Kconfig()
self._kconfig.read_from_file(kunitconfig_path)
def validate_config(self, build_dir):
kconfig_path = get_kconfig_path(build_dir)
validated_kconfig = kunit_config.Kconfig()
validated_kconfig.read_from_file(kconfig_path)
if not self._kconfig.is_subset_of(validated_kconfig):
invalid = self._kconfig.entries() - validated_kconfig.entries()
message = 'Provided Kconfig is not contained in validated .config. Following fields found in kunitconfig, ' \
'but not in .config: %s' % (
', '.join([str(e) for e in invalid])
)
logging.error(message)
return False
return True
def build_config(self, build_dir, make_options):
kconfig_path = get_kconfig_path(build_dir)
if build_dir and not os.path.exists(build_dir):
os.mkdir(build_dir)
self._kconfig.write_to_file(kconfig_path)
try:
self._ops.make_olddefconfig(build_dir, make_options)
except ConfigError as e:
logging.error(e)
return False
return self.validate_config(build_dir)
def build_reconfig(self, build_dir, make_options):
"""Creates a new .config if it is not a subset of the .kunitconfig."""
kconfig_path = get_kconfig_path(build_dir)
if os.path.exists(kconfig_path):
existing_kconfig = kunit_config.Kconfig()
existing_kconfig.read_from_file(kconfig_path)
if not self._kconfig.is_subset_of(existing_kconfig):
print('Regenerating .config ...')
os.remove(kconfig_path)
return self.build_config(build_dir, make_options)
else:
return True
else:
print('Generating .config ...')
return self.build_config(build_dir, make_options)
def build_um_kernel(self, alltests, jobs, build_dir, make_options):
try:
if alltests:
self._ops.make_allyesconfig(build_dir, make_options)
self._ops.make_olddefconfig(build_dir, make_options)
self._ops.make(jobs, build_dir, make_options)
except (ConfigError, BuildError) as e:
logging.error(e)
return False
return self.validate_config(build_dir)
def run_kernel(self, args=[], build_dir='', timeout=None):
args.extend(['mem=1G'])
self._ops.linux_bin(args, timeout, build_dir)
outfile = get_outfile_path(build_dir)
subprocess.call(['stty', 'sane'])
with open(outfile, 'r') as file:
for line in file:
yield line
def signal_handler(self, sig, frame):
logging.error('Build interruption occurred. Cleaning console.')
subprocess.call(['stty', 'sane'])