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From: Brendan Higgins <brendanhiggins-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
To: gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org,
	keescook-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org,
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Cc: brakmo-b10kYP2dOMg@public.gmane.org,
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	kieran.bingham-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org,
	Felix Guo
	<felixguoxiuping-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	joel-U3u1mxZcP9KHXe+LvDLADg@public.gmane.org,
	khilman-rdvid1DuHRBWk0Htik3J/w@public.gmane.org,
	Brendan Higgins
	<brendanhiggins-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	Tim.Bird-7U/KSKJipcs@public.gmane.org,
	linux-um-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
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	julia.lawall-L2FTfq7BK8M@public.gmane.org,
	kunit-dev-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
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	mpe-Gsx/Oe8HsFggBc27wqDAHg@public.gmane.org,
	joe-6d6DIl74uiNBDgjK7y7TUQ@public.gmane.org
Subject: [RFC v3 11/19] kunit: add Python libraries for handing KUnit config and kernel
Date: Wed, 28 Nov 2018 11:36:28 -0800
Message-ID: <20181128193636.254378-12-brendanhiggins@google.com> (raw)
In-Reply-To: <20181128193636.254378-1-brendanhiggins-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>

The ultimate goal is to create minimal isolated test binaries; in the
meantime we are using UML to provide the infrastructure to run tests, so
define an abstract way to configure and run tests that allow us to
change the context in which tests are built without affecting the user.
This also makes pretty and dynamic error reporting, and a lot of other
nice features easier.

kunit_config.py:
  - parse .config and Kconfig files.

kunit_kernel.py: provides helper functions to:
  - configure the kernel using kunitconfig.
  - build the kernel with the appropriate configuration.
  - provide function to invoke the kernel and stream the output back.

Signed-off-by: Felix Guo <felixguoxiuping-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Signed-off-by: Brendan Higgins <brendanhiggins-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
---
 tools/testing/kunit/.gitignore      |   3 +
 tools/testing/kunit/kunit_config.py |  60 +++++++++++++
 tools/testing/kunit/kunit_kernel.py | 126 ++++++++++++++++++++++++++++
 3 files changed, 189 insertions(+)
 create mode 100644 tools/testing/kunit/.gitignore
 create mode 100644 tools/testing/kunit/kunit_config.py
 create mode 100644 tools/testing/kunit/kunit_kernel.py

diff --git a/tools/testing/kunit/.gitignore b/tools/testing/kunit/.gitignore
new file mode 100644
index 0000000000000..c791ff59a37a9
--- /dev/null
+++ b/tools/testing/kunit/.gitignore
@@ -0,0 +1,3 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
\ No newline at end of file
diff --git a/tools/testing/kunit/kunit_config.py b/tools/testing/kunit/kunit_config.py
new file mode 100644
index 0000000000000..183bd5e758762
--- /dev/null
+++ b/tools/testing/kunit/kunit_config.py
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: GPL-2.0
+
+import collections
+import re
+
+CONFIG_IS_NOT_SET_PATTERN = r'^# CONFIG_\w+ is not set$'
+CONFIG_PATTERN = r'^CONFIG_\w+=\S+$'
+
+KconfigEntryBase = collections.namedtuple('KconfigEntry', ['raw_entry'])
+
+
+class KconfigEntry(KconfigEntryBase):
+
+	def __str__(self) -> str:
+		return self.raw_entry
+
+
+class KconfigParseError(Exception):
+	"""Error parsing Kconfig defconfig or .config."""
+
+
+class Kconfig(object):
+	"""Represents defconfig or .config specified using the Kconfig language."""
+
+	def __init__(self):
+		self._entries = []
+
+	def entries(self):
+		return set(self._entries)
+
+	def add_entry(self, entry: KconfigEntry) -> None:
+		self._entries.append(entry)
+
+	def is_subset_of(self, other: "Kconfig") -> bool:
+		return self.entries().issubset(other.entries())
+
+	def write_to_file(self, path: str) -> None:
+		with open(path, 'w') as f:
+			for entry in self.entries():
+				f.write(str(entry) + '\n')
+
+	def parse_from_string(self, blob: str) -> None:
+		"""Parses a string containing KconfigEntrys and populates this Kconfig."""
+		self._entries = []
+		is_not_set_matcher = re.compile(CONFIG_IS_NOT_SET_PATTERN)
+		config_matcher = re.compile(CONFIG_PATTERN)
+		for line in blob.split('\n'):
+			line = line.strip()
+			if not line:
+				continue
+			elif config_matcher.match(line) or is_not_set_matcher.match(line):
+				self._entries.append(KconfigEntry(line))
+			elif line[0] == '#':
+				continue
+			else:
+				raise KconfigParseError('Failed to parse: ' + line)
+
+	def read_from_file(self, path: str) -> None:
+		with open(path, 'r') as f:
+			self.parse_from_string(f.read())
diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py
new file mode 100644
index 0000000000000..bba7ea7ca1869
--- /dev/null
+++ b/tools/testing/kunit/kunit_kernel.py
@@ -0,0 +1,126 @@
+# SPDX-License-Identifier: GPL-2.0
+
+import logging
+import subprocess
+import os
+
+import kunit_config
+
+KCONFIG_PATH = '.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):
+		try:
+			subprocess.check_output(['make', 'ARCH=um', 'olddefconfig'])
+		except OSError as e:
+			raise ConfigError('Could not call make command: ' + e)
+		except subprocess.CalledProcessError as e:
+			raise ConfigError(e.output)
+
+	def make(self, jobs):
+		try:
+			subprocess.check_output([
+					'make',
+					'ARCH=um',
+					'--jobs=' + str(jobs)])
+		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):
+		"""Runs the Linux UML binary. Must be named 'linux'."""
+		process = subprocess.Popen(
+			['./linux'] + params,
+			stdin=subprocess.PIPE,
+			stdout=subprocess.PIPE,
+			stderr=subprocess.PIPE)
+		process.wait(timeout=timeout)
+		return process
+
+
+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')
+		self._ops = LinuxSourceTreeOperations()
+
+	def clean(self):
+		try:
+			self._ops.make_mrproper()
+		except ConfigError as e:
+			logging.error(e)
+			return False
+		return True
+
+	def build_config(self):
+		self._kconfig.write_to_file(KCONFIG_PATH)
+		try:
+			self._ops.make_olddefconfig()
+		except ConfigError as e:
+			logging.error(e)
+			return False
+		validated_kconfig = kunit_config.Kconfig()
+		validated_kconfig.read_from_file(KCONFIG_PATH)
+		if not self._kconfig.is_subset_of(validated_kconfig):
+			logging.error('Provided Kconfig is not contained in validated .config!')
+			return False
+		return True
+
+	def build_reconfig(self):
+		"""Creates a new .config if it is not a subset of the kunitconfig."""
+		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()
+			else:
+				return True
+		else:
+			print('Generating .config ...')
+			return self.build_config()
+
+	def build_um_kernel(self, jobs):
+		try:
+			self._ops.make_olddefconfig()
+			self._ops.make(jobs)
+		except (ConfigError, BuildError) as e:
+			logging.error(e)
+			return False
+		used_kconfig = kunit_config.Kconfig()
+		used_kconfig.read_from_file(KCONFIG_PATH)
+		if not self._kconfig.is_subset_of(used_kconfig):
+			logging.error('Provided Kconfig is not contained in final config!')
+			return False
+		return True
+
+	def run_kernel(self, args=[]):
+		timeout = None
+		args.extend(['mem=256M'])
+		process = self._ops.linux_bin(args, timeout)
+		with open('test.log', 'w') as f:
+			for line in process.stdout:
+				f.write(line.rstrip().decode('ascii') + '\n')
+				yield line.rstrip().decode('ascii')
-- 
2.20.0.rc0.387.gc7a69e6b6c-goog

  parent reply index

Thread overview: 118+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-28 19:36 [RFC v3 00/19] kunit: introduce KUnit, the Linux kernel unit testing framework Brendan Higgins
2018-11-28 19:36 ` [RFC v3 01/19] kunit: test: add KUnit test runner core Brendan Higgins
2018-11-30  3:14   ` Luis Chamberlain
2018-12-01  1:51     ` Brendan Higgins
2018-12-01  2:57       ` Luis Chamberlain
2018-12-05 13:15     ` Anton Ivanov
2018-12-05 14:45       ` Arnd Bergmann
2018-12-05 14:49         ` Anton Ivanov
2018-11-30  3:28   ` Luis Chamberlain
     [not found]     ` <20181130032802.GG18410-dAjH6bxAqesAS62YNPtMr3dQhYtBYE6JAL8bYrjMMd8@public.gmane.org>
2018-12-01  2:08       ` Brendan Higgins
2018-12-01  3:10         ` Luis Chamberlain
     [not found]           ` <20181201031049.GL28501-dAjH6bxAqesAS62YNPtMr3dQhYtBYE6JAL8bYrjMMd8@public.gmane.org>
2018-12-03 22:47             ` Brendan Higgins
2018-12-01  3:02   ` Luis Chamberlain
2018-11-28 19:36 ` [RFC v3 10/19] kunit: test: add test managed resource tests Brendan Higgins
     [not found] ` <20181128193636.254378-1-brendanhiggins-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2018-11-28 19:36   ` [RFC v3 02/19] kunit: test: add test resource management API Brendan Higgins
2018-11-28 19:36   ` [RFC v3 03/19] kunit: test: add string_stream a std::stream like string builder Brendan Higgins
2018-11-30  3:29     ` Luis Chamberlain
2018-12-01  2:14       ` Brendan Higgins
2018-12-01  3:12         ` Luis Chamberlain
2018-12-03 10:55       ` Petr Mladek
2018-12-04  0:35         ` Brendan Higgins
2018-11-28 19:36   ` [RFC v3 04/19] kunit: test: add test_stream a std::stream like logger Brendan Higgins
2018-11-28 19:36   ` [RFC v3 05/19] kunit: test: add the concept of expectations Brendan Higgins
2018-11-28 19:36   ` [RFC v3 06/19] arch: um: enable running kunit from User Mode Linux Brendan Higgins
2018-11-28 21:26     ` Rob Herring
2018-11-30  3:37       ` Luis Chamberlain
2018-11-30 14:05         ` Rob Herring
2018-11-30 18:22           ` Luis Chamberlain
     [not found]             ` <20181130182203.GS18410-dAjH6bxAqesAS62YNPtMr3dQhYtBYE6JAL8bYrjMMd8@public.gmane.org>
2018-12-03 23:22               ` Brendan Higgins
2018-11-30  3:30     ` Luis Chamberlain
2018-11-28 19:36   ` [RFC v3 07/19] kunit: test: add initial tests Brendan Higgins
2018-11-30  3:40     ` Luis Chamberlain
2018-12-03 23:26       ` Brendan Higgins
2018-12-03 23:43         ` Luis Chamberlain
2018-11-28 19:36   ` [RFC v3 08/19] arch: um: add shim to trap to allow installing a fault catcher for tests Brendan Higgins
2018-11-30  3:34     ` Luis Chamberlain
     [not found]       ` <20181130033429.GK18410-dAjH6bxAqesAS62YNPtMr3dQhYtBYE6JAL8bYrjMMd8@public.gmane.org>
2018-12-03 23:34         ` Brendan Higgins
     [not found]           ` <CAFd5g45+MAVaSW8HN9x57Y8Um=TV1Oa=-K8yExPBS-4KjLyciQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-12-03 23:46             ` Luis Chamberlain
     [not found]               ` <20181203234628.GR28501-dAjH6bxAqesAS62YNPtMr3dQhYtBYE6JAL8bYrjMMd8@public.gmane.org>
2018-12-04  0:44                 ` Brendan Higgins
2018-11-30  3:41     ` Luis Chamberlain
2018-12-03 23:37       ` Brendan Higgins
2018-11-28 19:36   ` [RFC v3 09/19] kunit: test: add the concept of assertions Brendan Higgins
2018-11-28 19:36   ` Brendan Higgins [this message]
2018-11-29 13:54     ` [RFC v3 11/19] kunit: add Python libraries for handing KUnit config and kernel Kieran Bingham
     [not found]       ` <841cf4ae-501b-05ae-5863-a51010709b67-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>
2018-12-03 23:48         ` Brendan Higgins
2018-12-04 20:47           ` Luis Chamberlain
2018-12-06 12:32             ` Kieran Bingham
2018-12-06 15:37               ` Matthew Wilcox
2018-12-07 11:30                 ` Kieran Bingham
2018-12-11 14:09                 ` Petr Mladek
2018-12-11 14:41                   ` Steven Rostedt
2018-12-11 17:01                     ` Anton Ivanov
2019-02-09  0:40                       ` Brendan Higgins
2018-12-07  1:05               ` Luis Chamberlain
2018-12-07 18:35               ` Kent Overstreet
2018-11-30  3:44     ` Luis Chamberlain
2018-12-03 23:50       ` Brendan Higgins
2018-12-04 20:48         ` Luis Chamberlain
2018-11-28 19:36   ` [RFC v3 12/19] kunit: add KUnit wrapper script and simple output parser Brendan Higgins
2018-11-28 19:36   ` [RFC v3 13/19] kunit: improve output from python wrapper Brendan Higgins
2018-11-28 19:36   ` [RFC v3 14/19] Documentation: kunit: add documentation for KUnit Brendan Higgins
2018-11-29 13:56     ` Kieran Bingham
2018-11-30  3:45       ` Luis Chamberlain
     [not found]         ` <20181130034525.GP18410-dAjH6bxAqesAS62YNPtMr3dQhYtBYE6JAL8bYrjMMd8@public.gmane.org>
2018-12-03 23:53           ` Brendan Higgins
2018-12-06 12:16             ` Kieran Bingham
2019-02-09  0:56               ` Brendan Higgins
2019-02-11 12:16                 ` Kieran Bingham
2019-02-12 22:10                   ` Brendan Higgins
2019-02-13 21:55                     ` Kieran Bingham
2019-02-14  0:17                       ` Brendan Higgins
2019-02-14 17:26                         ` Luis Chamberlain
2019-02-14 22:07                           ` Brendan Higgins
2018-11-28 19:36   ` [RFC v3 15/19] MAINTAINERS: add entry for KUnit the unit testing framework Brendan Higgins
2018-11-28 19:36   ` [RFC v3 17/19] of: unittest: migrate tests to run on KUnit Brendan Higgins
2018-11-28 20:56     ` Rob Herring
2018-11-30  0:39       ` Randy Dunlap
     [not found]         ` <18814973-8f0a-4647-a097-fcc3dc0b3cd3-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2018-12-04  0:13           ` Brendan Higgins
2018-12-04 13:40             ` Rob Herring
     [not found]               ` <CAL_JsqL_PivQbrJFEusdKAy-2EQtKL3OHbmyYSK9bzuTOQegqA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-12-05 23:42                 ` Brendan Higgins
2018-12-07  0:41                   ` Rob Herring
2018-12-04  0:08       ` Brendan Higgins
2019-02-13  1:44       ` Brendan Higgins
2019-02-14 20:10         ` Rob Herring
2019-02-14 21:52           ` Brendan Higgins
2019-02-18 22:56         ` Frank Rowand
2019-02-28  0:29           ` Brendan Higgins
2018-12-04 10:56     ` Frank Rowand
2018-11-28 19:36   ` [RFC v3 18/19] of: unittest: split out a couple of test cases from unittest Brendan Higgins
2018-12-04 10:58     ` Frank Rowand
2018-12-05 23:54       ` Brendan Higgins
2019-02-14 23:57         ` Frank Rowand
2019-02-15  0:56           ` Brendan Higgins
2019-02-15  2:05             ` Frank Rowand
2019-02-15 10:56               ` Brendan Higgins
2019-02-18 22:25                 ` Frank Rowand
2019-02-20 20:44                   ` Frank Rowand
2019-02-20 20:47                     ` Frank Rowand
2019-02-28  3:52                     ` Brendan Higgins
2019-03-22  0:22                       ` Frank Rowand
2019-03-22  1:30                         ` Brendan Higgins
2019-03-22  1:47                           ` Frank Rowand
2019-03-25 22:15                             ` Brendan Higgins
2019-09-20 16:57                           ` Rob Herring
2019-09-21 23:57                             ` Frank Rowand
2019-03-22  1:34                         ` Frank Rowand
2019-03-25 22:18                           ` Brendan Higgins
2018-11-28 19:36   ` [RFC v3 19/19] of: unittest: split up some super large test cases Brendan Higgins
2018-11-28 19:36 ` [RFC v3 16/19] arch: um: make UML unflatten device tree when testing Brendan Higgins
2018-11-28 21:16   ` Rob Herring
     [not found]     ` <CAL_JsqK5cG=QzMBFSZ31_-3ujnxqxv=jj3XYajbRLT7yWYZbfw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2018-12-04  0:00       ` Brendan Higgins
2018-11-30  3:46   ` Luis Chamberlain
2018-12-04  0:02     ` Brendan Higgins
2018-12-04 10:52 ` [RFC v3 00/19] kunit: introduce KUnit, the Linux kernel unit testing framework Frank Rowand
2018-12-04 11:40 ` Frank Rowand
2018-12-04 13:49   ` Rob Herring
2018-12-05 23:10     ` Brendan Higgins
2019-03-22  0:27       ` Frank Rowand
2019-03-25 22:04         ` Brendan Higgins

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    /path/to/YOUR_REPLY

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Linux-NVDIMM Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-nvdimm/0 linux-nvdimm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-nvdimm linux-nvdimm/ https://lore.kernel.org/linux-nvdimm \
		linux-nvdimm@lists.01.org
	public-inbox-index linux-nvdimm

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.01.lists.linux-nvdimm


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git