2019-09-23 17:02:43 +08:00
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# SPDX-License-Identifier: GPL-2.0
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#
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# Runs UML kernel, collects output, and handles errors.
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#
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# Copyright (C) 2019, Google LLC.
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# Author: Felix Guo <felixguoxiuping@gmail.com>
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# Author: Brendan Higgins <brendanhiggins@google.com>
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2021-05-27 05:24:06 +08:00
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import importlib.util
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2019-09-23 17:02:43 +08:00
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import logging
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import subprocess
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import os
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2020-10-27 00:59:25 +08:00
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import shutil
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2020-03-17 04:21:25 +08:00
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import signal
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2021-06-24 03:09:19 +08:00
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from typing import Iterator, Optional, Tuple
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2020-03-17 04:21:25 +08:00
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from contextlib import ExitStack
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2019-09-23 17:02:43 +08:00
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2021-05-27 05:24:06 +08:00
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from collections import namedtuple
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2019-09-23 17:02:43 +08:00
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import kunit_config
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2020-03-17 04:21:25 +08:00
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import kunit_parser
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2021-05-27 05:24:06 +08:00
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import qemu_config
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2019-09-23 17:02:43 +08:00
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KCONFIG_PATH = '.config'
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2020-10-27 00:59:25 +08:00
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KUNITCONFIG_PATH = '.kunitconfig'
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2021-05-22 12:42:40 +08:00
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DEFAULT_KUNITCONFIG_PATH = 'tools/testing/kunit/configs/default.config'
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2020-03-17 04:21:25 +08:00
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BROKEN_ALLCONFIG_PATH = 'tools/testing/kunit/configs/broken_on_uml.config'
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2020-10-27 00:59:26 +08:00
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OUTFILE_PATH = 'test.log'
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2021-05-27 05:24:06 +08:00
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ABS_TOOL_PATH = os.path.abspath(os.path.dirname(__file__))
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QEMU_CONFIGS_DIR = os.path.join(ABS_TOOL_PATH, 'qemu_configs')
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2019-09-23 17:02:43 +08:00
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2020-10-27 00:59:27 +08:00
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def get_file_path(build_dir, default):
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if build_dir:
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default = os.path.join(build_dir, default)
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return default
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2019-09-23 17:02:43 +08:00
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class ConfigError(Exception):
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"""Represents an error trying to configure the Linux kernel."""
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class BuildError(Exception):
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"""Represents an error trying to build the Linux kernel."""
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class LinuxSourceTreeOperations(object):
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"""An abstraction over command line operations performed on a source tree."""
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2021-05-27 05:24:06 +08:00
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def __init__(self, linux_arch: str, cross_compile: Optional[str]):
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self._linux_arch = linux_arch
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self._cross_compile = cross_compile
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def make_mrproper(self) -> None:
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2019-09-23 17:02:43 +08:00
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try:
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2020-07-09 05:35:43 +08:00
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subprocess.check_output(['make', 'mrproper'], stderr=subprocess.STDOUT)
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2019-09-23 17:02:43 +08:00
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except OSError as e:
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2020-10-01 02:31:51 +08:00
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raise ConfigError('Could not call make command: ' + str(e))
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2019-09-23 17:02:43 +08:00
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except subprocess.CalledProcessError as e:
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raise ConfigError(e.output.decode())
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2019-09-23 17:02:43 +08:00
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2021-05-27 05:24:06 +08:00
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def make_arch_qemuconfig(self, kconfig: kunit_config.Kconfig) -> None:
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pass
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def make_allyesconfig(self, build_dir, make_options) -> None:
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raise ConfigError('Only the "um" arch is supported for alltests')
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def make_olddefconfig(self, build_dir, make_options) -> None:
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command = ['make', 'ARCH=' + self._linux_arch, 'olddefconfig']
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if self._cross_compile:
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command += ['CROSS_COMPILE=' + self._cross_compile]
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2020-03-24 03:04:59 +08:00
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if make_options:
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command.extend(make_options)
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2019-09-23 17:02:43 +08:00
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if build_dir:
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command += ['O=' + build_dir]
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print('Populating config with:\n$', ' '.join(command))
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try:
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2020-07-09 05:35:43 +08:00
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subprocess.check_output(command, stderr=subprocess.STDOUT)
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2019-09-23 17:02:43 +08:00
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except OSError as e:
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2020-10-01 02:31:51 +08:00
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raise ConfigError('Could not call make command: ' + str(e))
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2019-09-23 17:02:43 +08:00
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except subprocess.CalledProcessError as e:
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2020-10-01 02:31:51 +08:00
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raise ConfigError(e.output.decode())
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2019-09-23 17:02:43 +08:00
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def make(self, jobs, build_dir, make_options) -> None:
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command = ['make', 'ARCH=' + self._linux_arch, '--jobs=' + str(jobs)]
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if make_options:
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command.extend(make_options)
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if self._cross_compile:
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command += ['CROSS_COMPILE=' + self._cross_compile]
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if build_dir:
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command += ['O=' + build_dir]
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print('Building with:\n$', ' '.join(command))
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try:
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proc = subprocess.Popen(command,
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stderr=subprocess.PIPE,
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stdout=subprocess.DEVNULL)
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except OSError as e:
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raise BuildError('Could not call execute make: ' + str(e))
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except subprocess.CalledProcessError as e:
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raise BuildError(e.output)
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_, stderr = proc.communicate()
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if proc.returncode != 0:
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raise BuildError(stderr.decode())
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if stderr: # likely only due to build warnings
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print(stderr.decode())
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def run(self, params, timeout, build_dir, outfile) -> None:
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pass
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class LinuxSourceTreeOperationsQemu(LinuxSourceTreeOperations):
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def __init__(self, qemu_arch_params: qemu_config.QemuArchParams, cross_compile: Optional[str]):
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super().__init__(linux_arch=qemu_arch_params.linux_arch,
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cross_compile=cross_compile)
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self._kconfig = qemu_arch_params.kconfig
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self._qemu_arch = qemu_arch_params.qemu_arch
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self._kernel_path = qemu_arch_params.kernel_path
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self._kernel_command_line = qemu_arch_params.kernel_command_line + ' kunit_shutdown=reboot'
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self._extra_qemu_params = qemu_arch_params.extra_qemu_params
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def make_arch_qemuconfig(self, base_kunitconfig: kunit_config.Kconfig) -> None:
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kconfig = kunit_config.Kconfig()
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kconfig.parse_from_string(self._kconfig)
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base_kunitconfig.merge_in_entries(kconfig)
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def run(self, params, timeout, build_dir, outfile):
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kernel_path = os.path.join(build_dir, self._kernel_path)
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qemu_command = ['qemu-system-' + self._qemu_arch,
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'-nodefaults',
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'-m', '1024',
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'-kernel', kernel_path,
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'-append', '\'' + ' '.join(params + [self._kernel_command_line]) + '\'',
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'-no-reboot',
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'-nographic',
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'-serial stdio'] + self._extra_qemu_params
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print('Running tests with:\n$', ' '.join(qemu_command))
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with open(outfile, 'w') as output:
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process = subprocess.Popen(' '.join(qemu_command),
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stdin=subprocess.PIPE,
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stdout=output,
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stderr=subprocess.STDOUT,
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text=True, shell=True)
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try:
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process.wait(timeout=timeout)
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except Exception as e:
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print(e)
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process.terminate()
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return process
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class LinuxSourceTreeOperationsUml(LinuxSourceTreeOperations):
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"""An abstraction over command line operations performed on a source tree."""
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def __init__(self, cross_compile=None):
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super().__init__(linux_arch='um', cross_compile=cross_compile)
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2021-01-15 08:39:11 +08:00
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def make_allyesconfig(self, build_dir, make_options) -> None:
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2020-03-17 04:21:25 +08:00
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kunit_parser.print_with_timestamp(
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'Enabling all CONFIGs for UML...')
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2020-09-24 05:19:38 +08:00
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command = ['make', 'ARCH=um', 'allyesconfig']
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if make_options:
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command.extend(make_options)
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if build_dir:
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command += ['O=' + build_dir]
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2020-03-17 04:21:25 +08:00
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process = subprocess.Popen(
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2020-09-24 05:19:38 +08:00
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command,
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stdout=subprocess.DEVNULL,
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stderr=subprocess.STDOUT)
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process.wait()
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kunit_parser.print_with_timestamp(
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'Disabling broken configs to run KUnit tests...')
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with ExitStack() as es:
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2020-09-24 05:19:38 +08:00
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config = open(get_kconfig_path(build_dir), 'a')
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2020-03-17 04:21:25 +08:00
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disable = open(BROKEN_ALLCONFIG_PATH, 'r').read()
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config.write(disable)
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kunit_parser.print_with_timestamp(
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'Starting Kernel with all configs takes a few minutes...')
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2021-05-27 05:24:06 +08:00
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def run(self, params, timeout, build_dir, outfile):
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"""Runs the Linux UML binary. Must be named 'linux'."""
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2020-10-27 00:59:27 +08:00
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linux_bin = get_file_path(build_dir, 'linux')
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2020-10-27 00:59:26 +08:00
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outfile = get_outfile_path(build_dir)
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2020-03-17 04:21:25 +08:00
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with open(outfile, 'w') as output:
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process = subprocess.Popen([linux_bin] + params,
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stdin=subprocess.PIPE,
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stdout=output,
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stderr=subprocess.STDOUT,
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text=True)
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2020-03-17 04:21:25 +08:00
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process.wait(timeout)
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2019-09-23 17:02:43 +08:00
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2021-01-15 08:39:11 +08:00
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def get_kconfig_path(build_dir) -> str:
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2020-10-27 00:59:27 +08:00
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return get_file_path(build_dir, KCONFIG_PATH)
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2019-09-23 17:02:43 +08:00
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def get_kunitconfig_path(build_dir) -> str:
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2020-10-27 00:59:27 +08:00
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return get_file_path(build_dir, KUNITCONFIG_PATH)
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2020-10-27 00:59:25 +08:00
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2021-01-15 08:39:11 +08:00
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def get_outfile_path(build_dir) -> str:
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2020-10-27 00:59:27 +08:00
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return get_file_path(build_dir, OUTFILE_PATH)
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2020-10-27 00:59:26 +08:00
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2021-05-27 05:24:06 +08:00
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def get_source_tree_ops(arch: str, cross_compile: Optional[str]) -> LinuxSourceTreeOperations:
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config_path = os.path.join(QEMU_CONFIGS_DIR, arch + '.py')
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if arch == 'um':
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return LinuxSourceTreeOperationsUml(cross_compile=cross_compile)
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elif os.path.isfile(config_path):
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return get_source_tree_ops_from_qemu_config(config_path, cross_compile)[1]
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else:
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raise ConfigError(arch + ' is not a valid arch')
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def get_source_tree_ops_from_qemu_config(config_path: str,
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cross_compile: Optional[str]) -> Tuple[
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str, LinuxSourceTreeOperations]:
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# The module name/path has very little to do with where the actual file
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# exists (I learned this through experimentation and could not find it
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# anywhere in the Python documentation).
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#
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# Bascially, we completely ignore the actual file location of the config
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# we are loading and just tell Python that the module lives in the
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# QEMU_CONFIGS_DIR for import purposes regardless of where it actually
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# exists as a file.
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module_path = '.' + os.path.join(os.path.basename(QEMU_CONFIGS_DIR), os.path.basename(config_path))
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spec = importlib.util.spec_from_file_location(module_path, config_path)
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config = importlib.util.module_from_spec(spec)
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# TODO(brendanhiggins@google.com): I looked this up and apparently other
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# Python projects have noted that pytype complains that "No attribute
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# 'exec_module' on _importlib_modulespec._Loader". Disabling for now.
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spec.loader.exec_module(config) # pytype: disable=attribute-error
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return config.QEMU_ARCH.linux_arch, LinuxSourceTreeOperationsQemu(
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config.QEMU_ARCH, cross_compile=cross_compile)
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2019-09-23 17:02:43 +08:00
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class LinuxSourceTree(object):
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"""Represents a Linux kernel source tree with KUnit tests."""
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def __init__(
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self,
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build_dir: str,
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load_config=True,
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kunitconfig_path='',
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arch=None,
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cross_compile=None,
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qemu_config_path=None) -> None:
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2020-03-17 04:21:25 +08:00
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signal.signal(signal.SIGINT, self.signal_handler)
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if qemu_config_path:
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self._arch, self._ops = get_source_tree_ops_from_qemu_config(
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qemu_config_path, cross_compile)
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else:
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self._arch = 'um' if arch is None else arch
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self._ops = get_source_tree_ops(self._arch, cross_compile)
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2021-01-15 08:39:13 +08:00
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if not load_config:
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return
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2019-09-23 17:02:43 +08:00
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2021-02-02 04:55:14 +08:00
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if kunitconfig_path:
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2021-02-23 06:52:41 +08:00
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if os.path.isdir(kunitconfig_path):
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kunitconfig_path = os.path.join(kunitconfig_path, KUNITCONFIG_PATH)
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2021-02-02 04:55:14 +08:00
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if not os.path.exists(kunitconfig_path):
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raise ConfigError(f'Specified kunitconfig ({kunitconfig_path}) does not exist')
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else:
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kunitconfig_path = get_kunitconfig_path(build_dir)
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if not os.path.exists(kunitconfig_path):
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shutil.copyfile(DEFAULT_KUNITCONFIG_PATH, kunitconfig_path)
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2020-10-27 00:59:25 +08:00
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self._kconfig = kunit_config.Kconfig()
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self._kconfig.read_from_file(kunitconfig_path)
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def clean(self) -> bool:
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try:
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self._ops.make_mrproper()
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except ConfigError as e:
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logging.error(e)
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return False
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return True
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2021-01-15 08:39:11 +08:00
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def validate_config(self, build_dir) -> bool:
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2019-11-27 06:36:16 +08:00
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kconfig_path = get_kconfig_path(build_dir)
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validated_kconfig = kunit_config.Kconfig()
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validated_kconfig.read_from_file(kconfig_path)
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if not self._kconfig.is_subset_of(validated_kconfig):
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invalid = self._kconfig.entries() - validated_kconfig.entries()
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message = 'Provided Kconfig is not contained in validated .config. Following fields found in kunitconfig, ' \
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'but not in .config: %s' % (
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', '.join([str(e) for e in invalid])
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)
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logging.error(message)
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return False
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return True
|
|
|
|
|
2021-01-15 08:39:11 +08:00
|
|
|
def build_config(self, build_dir, make_options) -> bool:
|
2019-09-23 17:02:43 +08:00
|
|
|
kconfig_path = get_kconfig_path(build_dir)
|
|
|
|
if build_dir and not os.path.exists(build_dir):
|
|
|
|
os.mkdir(build_dir)
|
|
|
|
try:
|
2021-05-27 05:24:06 +08:00
|
|
|
self._ops.make_arch_qemuconfig(self._kconfig)
|
|
|
|
self._kconfig.write_to_file(kconfig_path)
|
2020-03-24 03:04:59 +08:00
|
|
|
self._ops.make_olddefconfig(build_dir, make_options)
|
2019-09-23 17:02:43 +08:00
|
|
|
except ConfigError as e:
|
|
|
|
logging.error(e)
|
|
|
|
return False
|
2019-11-27 06:36:16 +08:00
|
|
|
return self.validate_config(build_dir)
|
2019-09-23 17:02:43 +08:00
|
|
|
|
2021-01-15 08:39:11 +08:00
|
|
|
def build_reconfig(self, build_dir, make_options) -> bool:
|
2019-12-20 13:14:07 +08:00
|
|
|
"""Creates a new .config if it is not a subset of the .kunitconfig."""
|
2019-09-23 17:02:43 +08:00
|
|
|
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)
|
2021-05-27 05:24:06 +08:00
|
|
|
self._ops.make_arch_qemuconfig(self._kconfig)
|
2019-09-23 17:02:43 +08:00
|
|
|
if not self._kconfig.is_subset_of(existing_kconfig):
|
|
|
|
print('Regenerating .config ...')
|
|
|
|
os.remove(kconfig_path)
|
2020-03-24 03:04:59 +08:00
|
|
|
return self.build_config(build_dir, make_options)
|
2019-09-23 17:02:43 +08:00
|
|
|
else:
|
|
|
|
return True
|
|
|
|
else:
|
|
|
|
print('Generating .config ...')
|
2020-03-24 03:04:59 +08:00
|
|
|
return self.build_config(build_dir, make_options)
|
2019-09-23 17:02:43 +08:00
|
|
|
|
2021-05-27 05:24:06 +08:00
|
|
|
def build_kernel(self, alltests, jobs, build_dir, make_options) -> bool:
|
2019-09-23 17:02:43 +08:00
|
|
|
try:
|
2020-09-24 05:19:38 +08:00
|
|
|
if alltests:
|
|
|
|
self._ops.make_allyesconfig(build_dir, make_options)
|
2020-03-24 03:04:59 +08:00
|
|
|
self._ops.make_olddefconfig(build_dir, make_options)
|
|
|
|
self._ops.make(jobs, build_dir, make_options)
|
2019-09-23 17:02:43 +08:00
|
|
|
except (ConfigError, BuildError) as e:
|
|
|
|
logging.error(e)
|
|
|
|
return False
|
2019-11-27 06:36:16 +08:00
|
|
|
return self.validate_config(build_dir)
|
2019-09-23 17:02:43 +08:00
|
|
|
|
kunit: tool: fix unintentional statefulness in run_kernel()
This is a bug that has been present since the first version of this
code.
Using [] as a default parameter is dangerous, since it's mutable.
Example using the REPL:
>>> def bad(param = []):
... param.append(len(param))
... print(param)
...
>>> bad()
[0]
>>> bad()
[0, 1]
This wasn't a concern in the past since it would just keep appending the
same values to it.
E.g. before, `args` would just grow in size like:
[mem=1G', 'console=tty']
[mem=1G', 'console=tty', mem=1G', 'console=tty']
But with now filter_glob, this is more dangerous, e.g.
run_kernel(filter_glob='my-test*') # default modified here
run_kernel() # filter_glob still applies here!
That earlier `filter_glob` will affect all subsequent calls that don't
specify `args`.
Note: currently the kunit tool only calls run_kernel() at most once, so
it's not possible to trigger any negative side-effects right now.
Fixes: 6ebf5866f2e8 ("kunit: tool: add Python wrappers for running KUnit tests")
Signed-off-by: Daniel Latypov <dlatypov@google.com>
Reviewed-by: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2021-02-06 08:08:54 +08:00
|
|
|
def run_kernel(self, args=None, build_dir='', filter_glob='', timeout=None) -> Iterator[str]:
|
|
|
|
if not args:
|
|
|
|
args = []
|
2021-05-27 05:24:04 +08:00
|
|
|
args.extend(['mem=1G', 'console=tty', 'kunit_shutdown=halt'])
|
2021-02-06 08:08:53 +08:00
|
|
|
if filter_glob:
|
|
|
|
args.append('kunit.filter_glob='+filter_glob)
|
2020-10-27 00:59:26 +08:00
|
|
|
outfile = get_outfile_path(build_dir)
|
2021-05-27 05:24:06 +08:00
|
|
|
self._ops.run(args, timeout, build_dir, outfile)
|
2020-03-17 04:21:25 +08:00
|
|
|
subprocess.call(['stty', 'sane'])
|
|
|
|
with open(outfile, 'r') as file:
|
|
|
|
for line in file:
|
|
|
|
yield line
|
|
|
|
|
2021-01-15 08:39:11 +08:00
|
|
|
def signal_handler(self, sig, frame) -> None:
|
2020-03-17 04:21:25 +08:00
|
|
|
logging.error('Build interruption occurred. Cleaning console.')
|
|
|
|
subprocess.call(['stty', 'sane'])
|