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
|
# 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 signal
from contextlib import ExitStack
import kunit_config
import kunit_parser
KCONFIG_PATH = '.config'
kunitconfig_path = '.kunitconfig'
BROKEN_ALLCONFIG_PATH = 'tools/testing/kunit/configs/broken_on_uml.config'
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'])
except OSError as e:
raise ConfigError('Could not call make command: ' + e)
except subprocess.CalledProcessError as e:
raise ConfigError(e.output)
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.PIPE)
except OSError as e:
raise ConfigError('Could not call make command: ' + e)
except subprocess.CalledProcessError as e:
raise ConfigError(e.output)
def make_allyesconfig(self):
kunit_parser.print_with_timestamp(
'Enabling all CONFIGs for UML...')
process = subprocess.Popen(
['make', 'ARCH=um', 'allyesconfig'],
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(KCONFIG_PATH, '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:
subprocess.check_output(command)
except OSError as e:
raise BuildError('Could not call execute make: ' + e)
except subprocess.CalledProcessError as e:
raise BuildError(e.output)
def linux_bin(self, params, timeout, build_dir, outfile):
"""Runs the Linux UML binary. Must be named 'linux'."""
linux_bin = './linux'
if build_dir:
linux_bin = os.path.join(build_dir, 'linux')
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):
kconfig_path = KCONFIG_PATH
if build_dir:
kconfig_path = os.path.join(build_dir, KCONFIG_PATH)
return kconfig_path
class LinuxSourceTree(object):
"""Represents a Linux kernel source tree with KUnit tests."""
def __init__(self):
self._kconfig = kunit_config.Kconfig()
self._kconfig.read_from_file(kunitconfig_path)
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 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):
if alltests:
self._ops.make_allyesconfig()
try:
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'])
outfile = 'test.log'
self._ops.linux_bin(args, timeout, build_dir, outfile)
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'])
|
