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461 lines
14 KiB
461 lines
14 KiB
#!/usr/bin/env python
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# Copyright 2017 Google Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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################################################################################
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from __future__ import print_function
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import argparse
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import imp
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import os
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import multiprocessing
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import resource
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import shutil
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import subprocess
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import tempfile
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import apt
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from apt import debfile
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from packages import package
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import wrapper_utils
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SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
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PACKAGES_DIR = os.path.join(SCRIPT_DIR, 'packages')
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TRACK_ORIGINS_ARG = '-fsanitize-memory-track-origins='
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INJECTED_ARGS = [
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'-fsanitize=memory',
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'-fsanitize-recover=memory',
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'-fPIC',
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'-fno-omit-frame-pointer',
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]
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class MSanBuildException(Exception):
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"""Base exception."""
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def GetTrackOriginsFlag():
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"""Get the track origins flag."""
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if os.getenv('MSAN_NO_TRACK_ORIGINS'):
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return TRACK_ORIGINS_ARG + '0'
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return TRACK_ORIGINS_ARG + '2'
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def GetInjectedFlags():
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return INJECTED_ARGS + [GetTrackOriginsFlag()]
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def SetUpEnvironment(work_dir):
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"""Set up build environment."""
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env = {}
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env['REAL_CLANG_PATH'] = subprocess.check_output(['which', 'clang']).strip()
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print('Real clang at', env['REAL_CLANG_PATH'])
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compiler_wrapper_path = os.path.join(SCRIPT_DIR, 'compiler_wrapper.py')
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# Symlink binaries into TMP/bin
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bin_dir = os.path.join(work_dir, 'bin')
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os.mkdir(bin_dir)
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dpkg_host_architecture = wrapper_utils.DpkgHostArchitecture()
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wrapper_utils.CreateSymlinks(
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compiler_wrapper_path,
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bin_dir,
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[
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'clang',
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'clang++',
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# Not all build rules respect $CC/$CXX, so make additional symlinks.
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'gcc',
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'g++',
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'cc',
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'c++',
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dpkg_host_architecture + '-gcc',
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dpkg_host_architecture + '-g++',
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])
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env['CC'] = os.path.join(bin_dir, 'clang')
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env['CXX'] = os.path.join(bin_dir, 'clang++')
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MSAN_OPTIONS = ' '.join(GetInjectedFlags())
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# We don't use nostrip because some build rules incorrectly break when it is
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# passed. Instead we install our own no-op strip binaries.
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env['DEB_BUILD_OPTIONS'] = ('nocheck parallel=%d' %
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multiprocessing.cpu_count())
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env['DEB_CFLAGS_APPEND'] = MSAN_OPTIONS
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env['DEB_CXXFLAGS_APPEND'] = MSAN_OPTIONS + ' -stdlib=libc++'
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env['DEB_CPPFLAGS_APPEND'] = MSAN_OPTIONS
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env['DEB_LDFLAGS_APPEND'] = MSAN_OPTIONS
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env['DPKG_GENSYMBOLS_CHECK_LEVEL'] = '0'
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# debian/rules can set DPKG_GENSYMBOLS_CHECK_LEVEL explicitly, so override it.
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gen_symbols_wrapper = ('#!/bin/sh\n'
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'export DPKG_GENSYMBOLS_CHECK_LEVEL=0\n'
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'/usr/bin/dpkg-gensymbols "$@"\n')
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wrapper_utils.InstallWrapper(bin_dir, 'dpkg-gensymbols', gen_symbols_wrapper)
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# Install no-op strip binaries.
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no_op_strip = ('#!/bin/sh\n' 'exit 0\n')
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wrapper_utils.InstallWrapper(bin_dir, 'strip', no_op_strip,
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[dpkg_host_architecture + '-strip'])
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env['PATH'] = bin_dir + ':' + os.environ['PATH']
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# nocheck doesn't disable override_dh_auto_test. So we have this hack to try
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# to disable "make check" or "make test" invocations.
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make_wrapper = ('#!/bin/bash\n'
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'if [ "$1" = "test" ] || [ "$1" = "check" ]; then\n'
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' exit 0\n'
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'fi\n'
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'/usr/bin/make "$@"\n')
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wrapper_utils.InstallWrapper(bin_dir, 'make', make_wrapper)
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# Prevent entire build from failing because of bugs/uninstrumented in tools
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# that are part of the build.
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msan_log_dir = os.path.join(work_dir, 'msan')
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os.mkdir(msan_log_dir)
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msan_log_path = os.path.join(msan_log_dir, 'log')
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env['MSAN_OPTIONS'] = ('halt_on_error=0:exitcode=0:report_umrs=0:log_path=' +
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msan_log_path)
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# Increase maximum stack size to prevent tests from failing.
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limit = 128 * 1024 * 1024
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resource.setrlimit(resource.RLIMIT_STACK, (limit, limit))
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return env
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def FindPackageDebs(package_name, work_directory):
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"""Find package debs."""
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deb_paths = []
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cache = apt.Cache()
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for filename in os.listdir(work_directory):
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file_path = os.path.join(work_directory, filename)
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if not file_path.endswith('.deb'):
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continue
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# Matching package name.
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deb = debfile.DebPackage(file_path)
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if deb.pkgname == package_name:
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deb_paths.append(file_path)
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continue
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# Also include -dev packages that depend on the runtime package.
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pkg = cache[deb.pkgname]
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if pkg.section != 'libdevel' and pkg.section != 'universe/libdevel':
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continue
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# But ignore -dbg packages.
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if deb.pkgname.endswith('-dbg'):
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continue
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for dependency in deb.depends:
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if any(dep[0] == package_name for dep in dependency):
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deb_paths.append(file_path)
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break
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return deb_paths
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def ExtractLibraries(deb_paths, work_directory, output_directory):
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"""Extract libraries from .deb packages."""
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extract_directory = os.path.join(work_directory, 'extracted')
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if os.path.exists(extract_directory):
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shutil.rmtree(extract_directory, ignore_errors=True)
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os.mkdir(extract_directory)
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for deb_path in deb_paths:
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subprocess.check_call(['dpkg-deb', '-x', deb_path, extract_directory])
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extracted = []
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for root, _, filenames in os.walk(extract_directory):
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if 'libx32' in root or 'lib32' in root:
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continue
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for filename in filenames:
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if (not filename.endswith('.so') and '.so.' not in filename and
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not filename.endswith('.a') and '.a' not in filename):
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continue
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file_path = os.path.join(root, filename)
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rel_file_path = os.path.relpath(file_path, extract_directory)
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rel_directory = os.path.dirname(rel_file_path)
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target_dir = os.path.join(output_directory, rel_directory)
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if not os.path.exists(target_dir):
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os.makedirs(target_dir)
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target_file_path = os.path.join(output_directory, rel_file_path)
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extracted.append(target_file_path)
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if os.path.lexists(target_file_path):
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os.remove(target_file_path)
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if os.path.islink(file_path):
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link_path = os.readlink(file_path)
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if os.path.isabs(link_path):
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# Make absolute links relative.
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link_path = os.path.relpath(link_path,
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os.path.join('/', rel_directory))
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os.symlink(link_path, target_file_path)
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else:
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shutil.copy2(file_path, target_file_path)
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return extracted
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def GetPackage(package_name):
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apt_cache = apt.Cache()
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version = apt_cache[package_name].candidate
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source_name = version.source_name
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local_source_name = source_name.replace('.', '_')
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custom_package_path = os.path.join(PACKAGES_DIR, local_source_name) + '.py'
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if not os.path.exists(custom_package_path):
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print('Using default package build steps.')
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return package.Package(source_name, version)
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print('Using custom package build steps.')
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module = imp.load_source('packages.' + local_source_name, custom_package_path)
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return module.Package(version)
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def PatchRpath(path, output_directory):
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"""Patch rpath to be relative to $ORIGIN."""
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try:
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rpaths = subprocess.check_output(['patchelf', '--print-rpath',
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path]).strip()
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except subprocess.CalledProcessError:
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return
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if not rpaths:
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return
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processed_rpath = []
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rel_directory = os.path.join(
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'/', os.path.dirname(os.path.relpath(path, output_directory)))
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for rpath in rpaths.split(':'):
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if '$ORIGIN' in rpath:
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# Already relative.
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processed_rpath.append(rpath)
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continue
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processed_rpath.append(
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os.path.join('$ORIGIN', os.path.relpath(rpath, rel_directory)))
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processed_rpath = ':'.join(processed_rpath)
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print('Patching rpath for', path, 'to', processed_rpath)
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subprocess.check_call(
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['patchelf', '--force-rpath', '--set-rpath', processed_rpath, path])
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def _CollectDependencies(apt_cache, pkg, cache, dependencies):
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"""Collect dependencies that need to be built."""
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C_OR_CXX_DEPS = [
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'libc++1',
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'libc6',
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'libc++abi1',
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'libgcc1',
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'libstdc++6',
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]
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BLACKLISTED_PACKAGES = [
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'libcapnp-0.5.3', # fails to compile on newer clang.
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'libllvm5.0',
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'libmircore1',
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'libmircommon7',
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'libmirclient9',
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'libmirprotobuf3',
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'multiarch-support',
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]
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if pkg.name in BLACKLISTED_PACKAGES:
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return False
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if pkg.section != 'libs' and pkg.section != 'universe/libs':
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return False
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if pkg.name in C_OR_CXX_DEPS:
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return True
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is_c_or_cxx = False
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for dependency in pkg.candidate.dependencies:
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dependency = dependency[0]
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if dependency.name in cache:
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is_c_or_cxx |= cache[dependency.name]
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else:
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is_c_or_cxx |= _CollectDependencies(apt_cache, apt_cache[dependency.name],
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cache, dependencies)
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if is_c_or_cxx:
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dependencies.append(pkg.name)
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cache[pkg.name] = is_c_or_cxx
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return is_c_or_cxx
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def GetBuildList(package_name):
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"""Get list of packages that need to be built including dependencies."""
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apt_cache = apt.Cache()
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pkg = apt_cache[package_name]
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dependencies = []
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_CollectDependencies(apt_cache, pkg, {}, dependencies)
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return dependencies
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class MSanBuilder(object):
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"""MSan builder."""
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def __init__(self,
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debug=False,
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log_path=None,
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work_dir=None,
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no_track_origins=False):
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self.debug = debug
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self.log_path = log_path
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self.work_dir = work_dir
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self.no_track_origins = no_track_origins
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self.env = None
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def __enter__(self):
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if not self.work_dir:
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self.work_dir = tempfile.mkdtemp(dir=self.work_dir)
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if os.path.exists(self.work_dir):
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shutil.rmtree(self.work_dir, ignore_errors=True)
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os.makedirs(self.work_dir)
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self.env = SetUpEnvironment(self.work_dir)
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if self.debug and self.log_path:
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self.env['WRAPPER_DEBUG_LOG_PATH'] = self.log_path
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if self.no_track_origins:
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self.env['MSAN_NO_TRACK_ORIGINS'] = '1'
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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if not self.debug:
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shutil.rmtree(self.work_dir, ignore_errors=True)
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def Build(self, package_name, output_directory, create_subdirs=False):
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"""Build the package and write results into the output directory."""
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deb_paths = FindPackageDebs(package_name, self.work_dir)
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if deb_paths:
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print('Source package already built for', package_name)
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else:
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pkg = GetPackage(package_name)
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pkg.InstallBuildDeps()
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source_directory = pkg.DownloadSource(self.work_dir)
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print('Source downloaded to', source_directory)
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# custom bin directory for custom build scripts to write wrappers.
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custom_bin_dir = os.path.join(self.work_dir, package_name + '_bin')
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os.mkdir(custom_bin_dir)
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env = self.env.copy()
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env['PATH'] = custom_bin_dir + ':' + env['PATH']
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pkg.Build(source_directory, env, custom_bin_dir)
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shutil.rmtree(custom_bin_dir, ignore_errors=True)
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deb_paths = FindPackageDebs(package_name, self.work_dir)
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if not deb_paths:
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raise MSanBuildException('Failed to find .deb packages.')
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print('Extracting', ' '.join(deb_paths))
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if create_subdirs:
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extract_directory = os.path.join(output_directory, package_name)
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else:
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extract_directory = output_directory
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extracted_paths = ExtractLibraries(deb_paths, self.work_dir,
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extract_directory)
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for extracted_path in extracted_paths:
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if os.path.islink(extracted_path):
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continue
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if os.path.basename(extracted_path) == 'llvm-symbolizer':
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continue
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PatchRpath(extracted_path, extract_directory)
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def main():
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parser = argparse.ArgumentParser('msan_build.py', description='MSan builder.')
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parser.add_argument('package_names', nargs='+', help='Name of the packages.')
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parser.add_argument('output_dir', help='Output directory.')
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parser.add_argument('--create-subdirs',
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action='store_true',
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help=('Create subdirectories in the output '
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'directory for each package.'))
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parser.add_argument('--work-dir', help='Work directory.')
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parser.add_argument('--no-build-deps',
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action='store_true',
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help='Don\'t build dependencies.')
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parser.add_argument('--debug', action='store_true', help='Enable debug mode.')
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parser.add_argument('--log-path', help='Log path for debugging.')
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parser.add_argument('--no-track-origins',
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action='store_true',
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help='Build with -fsanitize-memory-track-origins=0.')
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args = parser.parse_args()
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if args.no_track_origins:
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os.environ['MSAN_NO_TRACK_ORIGINS'] = '1'
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if not os.path.exists(args.output_dir):
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os.makedirs(args.output_dir)
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if args.no_build_deps:
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package_names = args.package_names
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else:
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all_packages = set()
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package_names = []
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# Get list of packages to build, including all dependencies.
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for package_name in args.package_names:
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for dep in GetBuildList(package_name):
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if dep in all_packages:
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continue
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if args.create_subdirs:
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os.mkdir(os.path.join(args.output_dir, dep))
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all_packages.add(dep)
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package_names.append(dep)
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print('Going to build:')
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for package_name in package_names:
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print('\t', package_name)
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with MSanBuilder(debug=args.debug,
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log_path=args.log_path,
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work_dir=args.work_dir,
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no_track_origins=args.no_track_origins) as builder:
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for package_name in package_names:
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builder.Build(package_name, args.output_dir, args.create_subdirs)
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if __name__ == '__main__':
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main()
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