summaryrefslogtreecommitdiffstats
path: root/tools/testing/kunit/kunit.py
blob: 9274c63558098daa1d9af8fd1e07775b2c552292 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
#!/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 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

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
	alltests: bool

@dataclass
class KunitParseRequest:
	raw_output: Optional[str]
	build_dir: str
	json: Optional[str]

@dataclass
class KunitExecRequest(KunitParseRequest):
	timeout: int
	alltests: bool
	filter_glob: str
	kernel_args: Optional[List[str]]
	run_isolated: Optional[str]

@dataclass
class KunitRequest(KunitExecRequest, KunitBuildRequest):
	pass


KernelDirectoryPath = sys.argv[0].split('tools/testing/kunit/')[0]

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:
	kunit_parser.print_with_timestamp('Configuring KUnit Kernel ...')

	config_start = time.time()
	success = linux.build_reconfig(request.build_dir, request.make_options)
	config_end = time.time()
	if not success:
		return KunitResult(KunitStatus.CONFIG_FAILURE,
				   config_end - config_start)
	return KunitResult(KunitStatus.SUCCESS,
			   config_end - config_start)

def build_tests(linux: kunit_kernel.LinuxSourceTree,
		request: KunitBuildRequest) -> KunitResult:
	kunit_parser.print_with_timestamp('Building KUnit Kernel ...')

	build_start = time.time()
	success = linux.build_kernel(request.alltests,
				     request.jobs,
				     request.build_dir,
				     request.make_options)
	build_end = time.time()
	if not success:
		return KunitResult(KunitStatus.BUILD_FAILURE,
				   build_end - build_start)
	if not success:
		return KunitResult(KunitStatus.BUILD_FAILURE,
				   build_end - build_start)
	return KunitResult(KunitStatus.SUCCESS,
			   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=None if request.alltests else request.timeout,
			   filter_glob=request.filter_glob,
			   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 lines if re.match('^[^\s.]+\.[^\s.]+$', l)]

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, case = 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.run_isolated:
		tests = _list_tests(linux, request)
		if request.run_isolated == 'test':
			filter_globs = tests
		if 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]

	test_counts = kunit_parser.TestCounts()
	exec_time = 0.0
	for i, filter_glob in enumerate(filter_globs):
		kunit_parser.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=None if request.alltests else request.timeout,
			filter_glob=filter_glob,
			build_dir=request.build_dir)

		_, test_result = parse_tests(request, 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
	else:
		return KunitStatus.TEST_FAILURE

def parse_tests(request: KunitParseRequest, input_data: Iterable[str]) -> Tuple[KunitResult, kunit_parser.Test]:
	parse_start = time.time()

	test_result = kunit_parser.Test()

	if request.raw_output:
		# Treat unparsed results as one passing test.
		test_result.status = kunit_parser.TestStatus.SUCCESS
		test_result.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)
		else:
			print(f'Unknown --raw_output option "{request.raw_output}"', file=sys.stderr)
		for line in output:
			print(line.rstrip())

	else:
		test_result = kunit_parser.parse_run_tests(input_data)
	parse_end = time.time()

	if request.json:
		json_obj = kunit_json.get_json_result(
					test=test_result,
					def_config='kunit_defconfig',
					build_dir=request.build_dir,
					json_path=request.json)
		if request.json == 'stdout':
			print(json_obj)

	if test_result.status != kunit_parser.TestStatus.SUCCESS:
		return KunitResult(KunitStatus.TEST_FAILURE, parse_end - parse_start), test_result

	return KunitResult(KunitStatus.SUCCESS, parse_end - parse_start), test_result

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()

	kunit_parser.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) -> None:
	parser.add_argument('--build_dir',
			    help='As in the make command, it specifies the build '
			    'directory.',
			    type=str, default='.kunit', metavar='build_dir')
	parser.add_argument('--make_options',
			    help='X=Y make option, can be repeated.',
			    action='append')
	parser.add_argument('--alltests',
			    help='Run all KUnit tests through allyesconfig',
			    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.',
			     metavar='kunitconfig')
	parser.add_argument('--kconfig_add',
			     help='Additional Kconfig options to append to the '
			     '.kunitconfig, e.g. CONFIG_KASAN=y. Can be repeated.',
			    action='append')

	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='cross_compile')

	parser.add_argument('--qemu_config',
			    help=('Takes a path to a path to a file containing '
				  'a QemuArchParams object.'),
			    type=str, metavar='qemu_config')

def add_build_opts(parser) -> 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='jobs')

def add_exec_opts(parser) -> 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='timeout')
	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('--kernel_args',
			    help='Kernel command-line parameters. Maybe be repeated',
			     action='append')
	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']),

def add_parse_opts(parser) -> None:
	parser.add_argument('--raw_output', help='If set don\'t format output from kernel. '
			    'If set to --raw_output=kunit, filters to just KUnit output.',
			    type=str, nargs='?', const='all', default=None)
	parser.add_argument('--json',
			    nargs='?',
			    help='Stores test results in a JSON, and either '
			    'prints to stdout or saves to file if a '
			    'filename is specified',
			    type=str, const='stdout', default=None)

def main(argv, linux=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())

	if cli_args.subcommand == 'run':
		if not os.path.exists(cli_args.build_dir):
			os.mkdir(cli_args.build_dir)

		if not linux:
			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
					kunitconfig_path=cli_args.kunitconfig,
					kconfig_add=cli_args.kconfig_add,
					arch=cli_args.arch,
					cross_compile=cli_args.cross_compile,
					qemu_config_path=cli_args.qemu_config)

		request = KunitRequest(build_dir=cli_args.build_dir,
				       make_options=cli_args.make_options,
				       jobs=cli_args.jobs,
				       alltests=cli_args.alltests,
				       raw_output=cli_args.raw_output,
				       json=cli_args.json,
				       timeout=cli_args.timeout,
				       filter_glob=cli_args.filter_glob,
				       kernel_args=cli_args.kernel_args,
				       run_isolated=cli_args.run_isolated)
		result = run_tests(linux, request)
		if result.status != KunitStatus.SUCCESS:
			sys.exit(1)
	elif cli_args.subcommand == 'config':
		if cli_args.build_dir and (
				not os.path.exists(cli_args.build_dir)):
			os.mkdir(cli_args.build_dir)

		if not linux:
			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
					kunitconfig_path=cli_args.kunitconfig,
					kconfig_add=cli_args.kconfig_add,
					arch=cli_args.arch,
					cross_compile=cli_args.cross_compile,
					qemu_config_path=cli_args.qemu_config)

		request = KunitConfigRequest(build_dir=cli_args.build_dir,
					     make_options=cli_args.make_options)
		result = config_tests(linux, request)
		kunit_parser.print_with_timestamp((
			'Elapsed time: %.3fs\n') % (
				result.elapsed_time))
		if result.status != KunitStatus.SUCCESS:
			sys.exit(1)
	elif cli_args.subcommand == 'build':
		if not linux:
			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
					kunitconfig_path=cli_args.kunitconfig,
					kconfig_add=cli_args.kconfig_add,
					arch=cli_args.arch,
					cross_compile=cli_args.cross_compile,
					qemu_config_path=cli_args.qemu_config)

		request = KunitBuildRequest(build_dir=cli_args.build_dir,
					    make_options=cli_args.make_options,
					    jobs=cli_args.jobs,
					    alltests=cli_args.alltests)
		result = config_and_build_tests(linux, request)
		kunit_parser.print_with_timestamp((
			'Elapsed time: %.3fs\n') % (
				result.elapsed_time))
		if result.status != KunitStatus.SUCCESS:
			sys.exit(1)
	elif cli_args.subcommand == 'exec':
		if not linux:
			linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
					kunitconfig_path=cli_args.kunitconfig,
					kconfig_add=cli_args.kconfig_add,
					arch=cli_args.arch,
					cross_compile=cli_args.cross_compile,
					qemu_config_path=cli_args.qemu_config)

		exec_request = KunitExecRequest(raw_output=cli_args.raw_output,
						build_dir=cli_args.build_dir,
						json=cli_args.json,
						timeout=cli_args.timeout,
						alltests=cli_args.alltests,
						filter_glob=cli_args.filter_glob,
						kernel_args=cli_args.kernel_args,
						run_isolated=cli_args.run_isolated)
		result = exec_tests(linux, exec_request)
		kunit_parser.print_with_timestamp((
			'Elapsed time: %.3fs\n') % (result.elapsed_time))
		if result.status != KunitStatus.SUCCESS:
			sys.exit(1)
	elif cli_args.subcommand == 'parse':
		if cli_args.file == None:
			sys.stdin.reconfigure(errors='backslashreplace')  # pytype: disable=attribute-error
			kunit_output = sys.stdin
		else:
			with open(cli_args.file, 'r', errors='backslashreplace') as f:
				kunit_output = f.read().splitlines()
		request = KunitParseRequest(raw_output=cli_args.raw_output,
					    build_dir='',
					    json=cli_args.json)
		result, _ = parse_tests(request, kunit_output)
		if result.status != KunitStatus.SUCCESS:
			sys.exit(1)
	else:
		parser.print_help()

if __name__ == '__main__':
	main(sys.argv[1:])