tools/testing/kunit/kunit.py
#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
#
# A thin wrapper on top of the KUnit Kernel
#
# Copyright (C) 2019, Google LLC.
# Author: Felix Guo <felixguoxiuping@gmail.com>
# Author: Brendan Higgins <brendanhiggins@google.com>
import argparse
import os
import re
import shlex
import sys
import time
assert sys.version_info >= (3, 7), "Python version is too old"
from dataclasses import dataclass
from enum import Enum, auto
from typing import Iterable, List, Optional, Sequence, Tuple
import kunit_json
import kunit_kernel
import kunit_parser
from kunit_printer import stdout
class KunitStatus(Enum):
SUCCESS = auto()
CONFIG_FAILURE = auto()
BUILD_FAILURE = auto()
TEST_FAILURE = auto()
@dataclass
class KunitResult:
status: KunitStatus
elapsed_time: float
@dataclass
class KunitConfigRequest:
build_dir: str
make_options: Optional[List[str]]
@dataclass
class KunitBuildRequest(KunitConfigRequest):
jobs: int
@dataclass
class KunitParseRequest:
raw_output: Optional[str]
json: Optional[str]
@dataclass
class KunitExecRequest(KunitParseRequest):
build_dir: str
timeout: int
filter_glob: str
filter: str
filter_action: Optional[str]
kernel_args: Optional[List[str]]
run_isolated: Optional[str]
list_tests: bool
list_tests_attr: bool
@dataclass
class KunitRequest(KunitExecRequest, KunitBuildRequest):
pass
def get_kernel_root_path() -> str:
path = sys.argv[0] if not __file__ else __file__
parts = os.path.realpath(path).split('tools/testing/kunit')
if len(parts) != 2:
sys.exit(1)
return parts[0]
def config_tests(linux: kunit_kernel.LinuxSourceTree,
request: KunitConfigRequest) -> KunitResult:
stdout.print_with_timestamp('Configuring KUnit Kernel ...')
config_start = time.time()
success = linux.build_reconfig(request.build_dir, request.make_options)
config_end = time.time()
status = KunitStatus.SUCCESS if success else KunitStatus.CONFIG_FAILURE
return KunitResult(status, config_end - config_start)
def build_tests(linux: kunit_kernel.LinuxSourceTree,
request: KunitBuildRequest) -> KunitResult:
stdout.print_with_timestamp('Building KUnit Kernel ...')
build_start = time.time()
success = linux.build_kernel(request.jobs,
request.build_dir,
request.make_options)
build_end = time.time()
status = KunitStatus.SUCCESS if success else KunitStatus.BUILD_FAILURE
return KunitResult(status, build_end - build_start)
def config_and_build_tests(linux: kunit_kernel.LinuxSourceTree,
request: KunitBuildRequest) -> KunitResult:
config_result = config_tests(linux, request)
if config_result.status != KunitStatus.SUCCESS:
return config_result
return build_tests(linux, request)
def _list_tests(linux: kunit_kernel.LinuxSourceTree, request: KunitExecRequest) -> List[str]:
args = ['kunit.action=list']
if request.kernel_args:
args.extend(request.kernel_args)
output = linux.run_kernel(args=args,
timeout=request.timeout,
filter_glob=request.filter_glob,
filter=request.filter,
filter_action=request.filter_action,
build_dir=request.build_dir)
lines = kunit_parser.extract_tap_lines(output)
# Hack! Drop the dummy TAP version header that the executor prints out.
lines.pop()
# Filter out any extraneous non-test output that might have gotten mixed in.
return [l for l in output if re.match(r'^[^\s.]+\.[^\s.]+$', l)]
def _list_tests_attr(linux: kunit_kernel.LinuxSourceTree, request: KunitExecRequest) -> Iterable[str]:
args = ['kunit.action=list_attr']
if request.kernel_args:
args.extend(request.kernel_args)
output = linux.run_kernel(args=args,
timeout=request.timeout,
filter_glob=request.filter_glob,
filter=request.filter,
filter_action=request.filter_action,
build_dir=request.build_dir)
lines = kunit_parser.extract_tap_lines(output)
# Hack! Drop the dummy TAP version header that the executor prints out.
lines.pop()
# Filter out any extraneous non-test output that might have gotten mixed in.
return lines
def _suites_from_test_list(tests: List[str]) -> List[str]:
"""Extracts all the suites from an ordered list of tests."""
suites = [] # type: List[str]
for t in tests:
parts = t.split('.', maxsplit=2)
if len(parts) != 2:
raise ValueError(f'internal KUnit error, test name should be of the form "<suite>.<test>", got "{t}"')
suite, _ = parts
if not suites or suites[-1] != suite:
suites.append(suite)
return suites
def exec_tests(linux: kunit_kernel.LinuxSourceTree, request: KunitExecRequest) -> KunitResult:
filter_globs = [request.filter_glob]
if request.list_tests:
output = _list_tests(linux, request)
for line in output:
print(line.rstrip())
return KunitResult(status=KunitStatus.SUCCESS, elapsed_time=0.0)
if request.list_tests_attr:
attr_output = _list_tests_attr(linux, request)
for line in attr_output:
print(line.rstrip())
return KunitResult(status=KunitStatus.SUCCESS, elapsed_time=0.0)
if request.run_isolated:
tests = _list_tests(linux, request)
if request.run_isolated == 'test':
filter_globs = tests
elif request.run_isolated == 'suite':
filter_globs = _suites_from_test_list(tests)
# Apply the test-part of the user's glob, if present.
if '.' in request.filter_glob:
test_glob = request.filter_glob.split('.', maxsplit=2)[1]
filter_globs = [g + '.'+ test_glob for g in filter_globs]
metadata = kunit_json.Metadata(arch=linux.arch(), build_dir=request.build_dir, def_config='kunit_defconfig')
test_counts = kunit_parser.TestCounts()
exec_time = 0.0
for i, filter_glob in enumerate(filter_globs):
stdout.print_with_timestamp('Starting KUnit Kernel ({}/{})...'.format(i+1, len(filter_globs)))
test_start = time.time()
run_result = linux.run_kernel(
args=request.kernel_args,
timeout=request.timeout,
filter_glob=filter_glob,
filter=request.filter,
filter_action=request.filter_action,
build_dir=request.build_dir)
_, test_result = parse_tests(request, metadata, run_result)
# run_kernel() doesn't block on the kernel exiting.
# That only happens after we get the last line of output from `run_result`.
# So exec_time here actually contains parsing + execution time, which is fine.
test_end = time.time()
exec_time += test_end - test_start
test_counts.add_subtest_counts(test_result.counts)
if len(filter_globs) == 1 and test_counts.crashed > 0:
bd = request.build_dir
print('The kernel seems to have crashed; you can decode the stack traces with:')
print('$ scripts/decode_stacktrace.sh {}/vmlinux {} < {} | tee {}/decoded.log | {} parse'.format(
bd, bd, kunit_kernel.get_outfile_path(bd), bd, sys.argv[0]))
kunit_status = _map_to_overall_status(test_counts.get_status())
return KunitResult(status=kunit_status, elapsed_time=exec_time)
def _map_to_overall_status(test_status: kunit_parser.TestStatus) -> KunitStatus:
if test_status in (kunit_parser.TestStatus.SUCCESS, kunit_parser.TestStatus.SKIPPED):
return KunitStatus.SUCCESS
return KunitStatus.TEST_FAILURE
def parse_tests(request: KunitParseRequest, metadata: kunit_json.Metadata, input_data: Iterable[str]) -> Tuple[KunitResult, kunit_parser.Test]:
parse_start = time.time()
if request.raw_output:
# Treat unparsed results as one passing test.
fake_test = kunit_parser.Test()
fake_test.status = kunit_parser.TestStatus.SUCCESS
fake_test.counts.passed = 1
output: Iterable[str] = input_data
if request.raw_output == 'all':
pass
elif request.raw_output == 'kunit':
output = kunit_parser.extract_tap_lines(output)
for line in output:
print(line.rstrip())
parse_time = time.time() - parse_start
return KunitResult(KunitStatus.SUCCESS, parse_time), fake_test
# Actually parse the test results.
test = kunit_parser.parse_run_tests(input_data)
parse_time = time.time() - parse_start
if request.json:
json_str = kunit_json.get_json_result(
test=test,
metadata=metadata)
if request.json == 'stdout':
print(json_str)
else:
with open(request.json, 'w') as f:
f.write(json_str)
stdout.print_with_timestamp("Test results stored in %s" %
os.path.abspath(request.json))
if test.status != kunit_parser.TestStatus.SUCCESS:
return KunitResult(KunitStatus.TEST_FAILURE, parse_time), test
return KunitResult(KunitStatus.SUCCESS, parse_time), test
def run_tests(linux: kunit_kernel.LinuxSourceTree,
request: KunitRequest) -> KunitResult:
run_start = time.time()
config_result = config_tests(linux, request)
if config_result.status != KunitStatus.SUCCESS:
return config_result
build_result = build_tests(linux, request)
if build_result.status != KunitStatus.SUCCESS:
return build_result
exec_result = exec_tests(linux, request)
run_end = time.time()
stdout.print_with_timestamp((
'Elapsed time: %.3fs total, %.3fs configuring, %.3fs ' +
'building, %.3fs running\n') % (
run_end - run_start,
config_result.elapsed_time,
build_result.elapsed_time,
exec_result.elapsed_time))
return exec_result
# Problem:
# $ kunit.py run --json
# works as one would expect and prints the parsed test results as JSON.
# $ kunit.py run --json suite_name
# would *not* pass suite_name as the filter_glob and print as json.
# argparse will consider it to be another way of writing
# $ kunit.py run --json=suite_name
# i.e. it would run all tests, and dump the json to a `suite_name` file.
# So we hackily automatically rewrite --json => --json=stdout
pseudo_bool_flag_defaults = {
'--json': 'stdout',
'--raw_output': 'kunit',
}
def massage_argv(argv: Sequence[str]) -> Sequence[str]:
def massage_arg(arg: str) -> str:
if arg not in pseudo_bool_flag_defaults:
return arg
return f'{arg}={pseudo_bool_flag_defaults[arg]}'
return list(map(massage_arg, argv))
def get_default_jobs() -> int:
return len(os.sched_getaffinity(0))
def add_common_opts(parser: argparse.ArgumentParser) -> None:
parser.add_argument('--build_dir',
help='As in the make command, it specifies the build '
'directory.',
type=str, default='.kunit', metavar='DIR')
parser.add_argument('--make_options',
help='X=Y make option, can be repeated.',
action='append', metavar='X=Y')
parser.add_argument('--alltests',
help='Run all KUnit tests via tools/testing/kunit/configs/all_tests.config',
action='store_true')
parser.add_argument('--kunitconfig',
help='Path to Kconfig fragment that enables KUnit tests.'
' If given a directory, (e.g. lib/kunit), "/.kunitconfig" '
'will get automatically appended. If repeated, the files '
'blindly concatenated, which might not work in all cases.',
action='append', metavar='PATHS')
parser.add_argument('--kconfig_add',
help='Additional Kconfig options to append to the '
'.kunitconfig, e.g. CONFIG_KASAN=y. Can be repeated.',
action='append', metavar='CONFIG_X=Y')
parser.add_argument('--arch',
help=('Specifies the architecture to run tests under. '
'The architecture specified here must match the '
'string passed to the ARCH make param, '
'e.g. i386, x86_64, arm, um, etc. Non-UML '
'architectures run on QEMU.'),
type=str, default='um', metavar='ARCH')
parser.add_argument('--cross_compile',
help=('Sets make\'s CROSS_COMPILE variable; it should '
'be set to a toolchain path prefix (the prefix '
'of gcc and other tools in your toolchain, for '
'example `sparc64-linux-gnu-` if you have the '
'sparc toolchain installed on your system, or '
'`$HOME/toolchains/microblaze/gcc-9.2.0-nolibc/microblaze-linux/bin/microblaze-linux-` '
'if you have downloaded the microblaze toolchain '
'from the 0-day website to a directory in your '
'home directory called `toolchains`).'),
metavar='PREFIX')
parser.add_argument('--qemu_config',
help=('Takes a path to a path to a file containing '
'a QemuArchParams object.'),
type=str, metavar='FILE')
parser.add_argument('--qemu_args',
help='Additional QEMU arguments, e.g. "-smp 8"',
action='append', metavar='')
def add_build_opts(parser: argparse.ArgumentParser) -> None:
parser.add_argument('--jobs',
help='As in the make command, "Specifies the number of '
'jobs (commands) to run simultaneously."',
type=int, default=get_default_jobs(), metavar='N')
def add_exec_opts(parser: argparse.ArgumentParser) -> None:
parser.add_argument('--timeout',
help='maximum number of seconds to allow for all tests '
'to run. This does not include time taken to build the '
'tests.',
type=int,
default=300,
metavar='SECONDS')
parser.add_argument('filter_glob',
help='Filter which KUnit test suites/tests run at '
'boot-time, e.g. list* or list*.*del_test',
type=str,
nargs='?',
default='',
metavar='filter_glob')
parser.add_argument('--filter',
help='Filter KUnit tests with attributes, '
'e.g. module=example or speed>slow',
type=str,
default='')
parser.add_argument('--filter_action',
help='If set to skip, filtered tests will be skipped, '
'e.g. --filter_action=skip. Otherwise they will not run.',
type=str,
choices=['skip'])
parser.add_argument('--kernel_args',
help='Kernel command-line parameters. Maybe be repeated',
action='append', metavar='')
parser.add_argument('--run_isolated', help='If set, boot the kernel for each '
'individual suite/test. This is can be useful for debugging '
'a non-hermetic test, one that might pass/fail based on '
'what ran before it.',
type=str,
choices=['suite', 'test'])
parser.add_argument('--list_tests', help='If set, list all tests that will be '
'run.',
action='store_true')
parser.add_argument('--list_tests_attr', help='If set, list all tests and test '
'attributes.',
action='store_true')
def add_parse_opts(parser: argparse.ArgumentParser) -> None:
parser.add_argument('--raw_output', help='If set don\'t parse output from kernel. '
'By default, filters to just KUnit output. Use '
'--raw_output=all to show everything',
type=str, nargs='?', const='all', default=None, choices=['all', 'kunit'])
parser.add_argument('--json',
nargs='?',
help='Prints parsed test results as JSON to stdout or a file if '
'a filename is specified. Does nothing if --raw_output is set.',
type=str, const='stdout', default=None, metavar='FILE')
def tree_from_args(cli_args: argparse.Namespace) -> kunit_kernel.LinuxSourceTree:
"""Returns a LinuxSourceTree based on the user's arguments."""
# Allow users to specify multiple arguments in one string, e.g. '-smp 8'
qemu_args: List[str] = []
if cli_args.qemu_args:
for arg in cli_args.qemu_args:
qemu_args.extend(shlex.split(arg))
kunitconfigs = cli_args.kunitconfig if cli_args.kunitconfig else []
if cli_args.alltests:
# Prepend so user-specified options take prio if we ever allow
# --kunitconfig options to have differing options.
kunitconfigs = [kunit_kernel.ALL_TESTS_CONFIG_PATH] + kunitconfigs
return kunit_kernel.LinuxSourceTree(cli_args.build_dir,
kunitconfig_paths=kunitconfigs,
kconfig_add=cli_args.kconfig_add,
arch=cli_args.arch,
cross_compile=cli_args.cross_compile,
qemu_config_path=cli_args.qemu_config,
extra_qemu_args=qemu_args)
def run_handler(cli_args: argparse.Namespace) -> None:
if not os.path.exists(cli_args.build_dir):
os.mkdir(cli_args.build_dir)
linux = tree_from_args(cli_args)
request = KunitRequest(build_dir=cli_args.build_dir,
make_options=cli_args.make_options,
jobs=cli_args.jobs,
raw_output=cli_args.raw_output,
json=cli_args.json,
timeout=cli_args.timeout,
filter_glob=cli_args.filter_glob,
filter=cli_args.filter,
filter_action=cli_args.filter_action,
kernel_args=cli_args.kernel_args,
run_isolated=cli_args.run_isolated,
list_tests=cli_args.list_tests,
list_tests_attr=cli_args.list_tests_attr)
result = run_tests(linux, request)
if result.status != KunitStatus.SUCCESS:
sys.exit(1)
def config_handler(cli_args: argparse.Namespace) -> None:
if cli_args.build_dir and (
not os.path.exists(cli_args.build_dir)):
os.mkdir(cli_args.build_dir)
linux = tree_from_args(cli_args)
request = KunitConfigRequest(build_dir=cli_args.build_dir,
make_options=cli_args.make_options)
result = config_tests(linux, request)
stdout.print_with_timestamp((
'Elapsed time: %.3fs\n') % (
result.elapsed_time))
if result.status != KunitStatus.SUCCESS:
sys.exit(1)
def build_handler(cli_args: argparse.Namespace) -> None:
linux = tree_from_args(cli_args)
request = KunitBuildRequest(build_dir=cli_args.build_dir,
make_options=cli_args.make_options,
jobs=cli_args.jobs)
result = config_and_build_tests(linux, request)
stdout.print_with_timestamp((
'Elapsed time: %.3fs\n') % (
result.elapsed_time))
if result.status != KunitStatus.SUCCESS:
sys.exit(1)
def exec_handler(cli_args: argparse.Namespace) -> None:
linux = tree_from_args(cli_args)
exec_request = KunitExecRequest(raw_output=cli_args.raw_output,
build_dir=cli_args.build_dir,
json=cli_args.json,
timeout=cli_args.timeout,
filter_glob=cli_args.filter_glob,
filter=cli_args.filter,
filter_action=cli_args.filter_action,
kernel_args=cli_args.kernel_args,
run_isolated=cli_args.run_isolated,
list_tests=cli_args.list_tests,
list_tests_attr=cli_args.list_tests_attr)
result = exec_tests(linux, exec_request)
stdout.print_with_timestamp((
'Elapsed time: %.3fs\n') % (result.elapsed_time))
if result.status != KunitStatus.SUCCESS:
sys.exit(1)
def parse_handler(cli_args: argparse.Namespace) -> None:
if cli_args.file is None:
sys.stdin.reconfigure(errors='backslashreplace') # type: ignore
kunit_output = sys.stdin # type: Iterable[str]
else:
with open(cli_args.file, 'r', errors='backslashreplace') as f:
kunit_output = f.read().splitlines()
# We know nothing about how the result was created!
metadata = kunit_json.Metadata()
request = KunitParseRequest(raw_output=cli_args.raw_output,
json=cli_args.json)
result, _ = parse_tests(request, metadata, kunit_output)
if result.status != KunitStatus.SUCCESS:
sys.exit(1)
subcommand_handlers_map = {
'run': run_handler,
'config': config_handler,
'build': build_handler,
'exec': exec_handler,
'parse': parse_handler
}
def main(argv: Sequence[str]) -> None:
parser = argparse.ArgumentParser(
description='Helps writing and running KUnit tests.')
subparser = parser.add_subparsers(dest='subcommand')
# The 'run' command will config, build, exec, and parse in one go.
run_parser = subparser.add_parser('run', help='Runs KUnit tests.')
add_common_opts(run_parser)
add_build_opts(run_parser)
add_exec_opts(run_parser)
add_parse_opts(run_parser)
config_parser = subparser.add_parser('config',
help='Ensures that .config contains all of '
'the options in .kunitconfig')
add_common_opts(config_parser)
build_parser = subparser.add_parser('build', help='Builds a kernel with KUnit tests')
add_common_opts(build_parser)
add_build_opts(build_parser)
exec_parser = subparser.add_parser('exec', help='Run a kernel with KUnit tests')
add_common_opts(exec_parser)
add_exec_opts(exec_parser)
add_parse_opts(exec_parser)
# The 'parse' option is special, as it doesn't need the kernel source
# (therefore there is no need for a build_dir, hence no add_common_opts)
# and the '--file' argument is not relevant to 'run', so isn't in
# add_parse_opts()
parse_parser = subparser.add_parser('parse',
help='Parses KUnit results from a file, '
'and parses formatted results.')
add_parse_opts(parse_parser)
parse_parser.add_argument('file',
help='Specifies the file to read results from.',
type=str, nargs='?', metavar='input_file')
cli_args = parser.parse_args(massage_argv(argv))
if get_kernel_root_path():
os.chdir(get_kernel_root_path())
subcomand_handler = subcommand_handlers_map.get(cli_args.subcommand, None)
if subcomand_handler is None:
parser.print_help()
return
subcomand_handler(cli_args)
if __name__ == '__main__':
main(sys.argv[1:])