From patchwork Wed Nov 28 19:36:28 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brendan Higgins X-Patchwork-Id: 10703273 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0612916B1 for ; Wed, 28 Nov 2018 19:39:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EC1C12D722 for ; Wed, 28 Nov 2018 19:39:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DFFC52D762; Wed, 28 Nov 2018 19:39:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3BA782D722 for ; Wed, 28 Nov 2018 19:39:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729434AbeK2Gk5 (ORCPT ); Thu, 29 Nov 2018 01:40:57 -0500 Received: from mail-qt1-f201.google.com ([209.85.160.201]:35775 "EHLO mail-qt1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729117AbeK2Gk4 (ORCPT ); Thu, 29 Nov 2018 01:40:56 -0500 Received: by mail-qt1-f201.google.com with SMTP id p24so25042251qtl.2 for ; Wed, 28 Nov 2018 11:38:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=1xbhMNvec4B5xSL1oHl4qV1ywjoofQ6muA5OEf5mErs=; b=r5egsVPRtZM1HiSYPImpPHgaH/CRRTATj35KzJJyDHka55x2wrsE33cx+AjID9zNBs wDl7b+lgf5EXTzSL6dm3PZL1l2IHSLReffNuF9QESIRxzvyJ8YdjxFKR+9FpUx54h6QM p0zzWxOZQ4nGxJqiHkY6IQhw3/9mCvKkz8XPMhFCrQJetPWFAWoa4qL/phXTSdJ93o64 oYLhFcm/fQJNxeK3gh06IQxgJFWl3iyOZubW9VDx3tzfF+RZIac3DLldmaqpaQvgmOPI F44sZgceb68ovu2sBcpMLosRACXuUwStlhbR9a4u05NGltWhikJwTHtMC3pvlZfbvwtJ +4cQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=1xbhMNvec4B5xSL1oHl4qV1ywjoofQ6muA5OEf5mErs=; b=a4pOTS66u8HTOqaNKgVWSDc/mXZHoO8tyznJ81bus6dvPj3SVLXVehCJxOlXTV2Smf HqB/eKJcPMz04hF9mZ5d/fBzGLwqMaRQIPvkblpqUMZdMC6c8Tc8P+83nMAi2/LJ+nEV PmAWf/ckQManTrgag3cDVuLteqxI/3EJniYBd8GQ3P7c5SYeeINFxbA1Q+nYJzqe+glu iSzD+Xsn5Qvg+mWz7KIhqzBZNIs0ms6mChyvA0urphQqaFkzd2OViEC6JJPR8tUAg1vi RAk9uM66eSH29ddHS0xmL2YGo6zuGFZCVJEwbf4awHU+FhhEqDsdSaZcZlu4A+ETUH3W iUlA== X-Gm-Message-State: AA+aEWbXwhyOQIpjh8HDQatLE9S7Ukoq7h9D35bU0qRXwyB/yhbgoMv4 IZcLch2iJ0QDaVFDGIyzkiAmdtmEhcwW52cjCDrEQQ== X-Google-Smtp-Source: AFSGD/Vp+eB7mYlveEADB2/q7q2KIhbKFmASYVVYOI9B5oqatosjGn+i5nND9oFLxE3mJ+hoTvDPmtlDSUMyjBueDGCklw== X-Received: by 2002:a37:67d7:: with SMTP id b206mr4522605qkc.17.1543433891235; Wed, 28 Nov 2018 11:38:11 -0800 (PST) Date: Wed, 28 Nov 2018 11:36:28 -0800 In-Reply-To: <20181128193636.254378-1-brendanhiggins@google.com> Message-Id: <20181128193636.254378-12-brendanhiggins@google.com> Mime-Version: 1.0 References: <20181128193636.254378-1-brendanhiggins@google.com> X-Mailer: git-send-email 2.20.0.rc0.387.gc7a69e6b6c-goog Subject: [RFC v3 11/19] kunit: add Python libraries for handing KUnit config and kernel From: Brendan Higgins To: gregkh@linuxfoundation.org, keescook@google.com, mcgrof@kernel.org, shuah@kernel.org Cc: joel@jms.id.au, mpe@ellerman.id.au, joe@perches.com, brakmo@fb.com, rostedt@goodmis.org, Tim.Bird@sony.com, khilman@baylibre.com, julia.lawall@lip6.fr, linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, jdike@addtoit.com, richard@nod.at, linux-um@lists.infradead.org, daniel@ffwll.ch, dri-devel@lists.freedesktop.org, robh@kernel.org, dan.j.williams@intel.com, linux-nvdimm@lists.01.org, kieran.bingham@ideasonboard.com, frowand.list@gmail.com, knut.omang@oracle.com, Brendan Higgins , Felix Guo Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 Signed-off-by: Brendan Higgins --- 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')