#!/usr/bin/python # Copyright 2013 The Chromium Authors. All rights reserved. # Use of this source code is governed by a BSD-style license that can be # found in the LICENSE file. """Downloads, builds (with instrumentation) and installs shared libraries.""" import argparse import os import platform import shutil import subprocess import sys # Build parameters for different sanitizers. # We use XORIGIN as RPATH and after building library replace it to $ORIGIN # The reason: this flag goes through configure script and makefiles # differently for different libraries. So the dollar sign '$' should be # differently escaped. Instead of having problems with that it just # uses XORIGIN to build library and after that replaces it to $ORIGIN # directly in .so file. SUPPORTED_SANITIZERS = { 'asan': { 'compiler_flags': '-fsanitize=address -gline-tables-only -fPIC -w', 'linker_flags': '-fsanitize=address -Wl,-z,origin -Wl,-R,XORIGIN/.' }, 'msan': { 'compiler_flags': '-fsanitize=memory -fsanitize-memory-track-origins ' '-gline-tables-only -fPIC -w', 'linker_flags': '-fsanitize=memory -Wl,-z,origin -Wl,-R,XORIGIN/.' }, } class ScopedChangeDirectory(object): """Changes current working directory and restores it back automatically.""" def __init__(self, path): self.path = path self.old_path = '' def __enter__(self): self.old_path = os.getcwd() os.chdir(self.path) return self def __exit__(self, exc_type, exc_value, traceback): os.chdir(self.old_path) def get_script_absolute_path(): return os.path.dirname(os.path.abspath(__file__)) def get_library_build_dependencies(library): command = 'apt-get -s build-dep %s | grep Inst | cut -d " " -f 2' % library command_result = subprocess.Popen(command, stdout=subprocess.PIPE, shell=True) if command_result.wait(): raise Exception("Failed to determine build dependencies for %s" % library) build_dependencies = [l.strip() for l in command_result.stdout] return build_dependencies def check_library_build_dependencies(library): build_dependencies = get_library_build_dependencies(library) if len(build_dependencies): print >> sys.stderr, 'Please, install build-dependencies for %s' % library print >> sys.stderr, 'One-liner for APT:' print >> sys.stderr, 'sudo apt-get -y --no-remove build-dep %s' % library sys.exit(1) def shell_call(command, verbose=False, environment=None): """ Wrapper on subprocess.Popen Calls command with specific environment and verbosity using subprocess.Popen Args: command: Command to run in shell. verbose: If False, hides all stdout and stderr in case of successful build. Otherwise, always prints stdout and stderr. environment: Parameter 'env' for subprocess.Popen. Returns: None Raises: Exception: if return code after call is not zero. """ child = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, env=environment, shell=True) stdout, stderr = child.communicate() if verbose or child.returncode: print stdout if child.returncode: raise Exception("Failed to run: %s" % command) def configure_make_install(parsed_arguments, environment, install_prefix): configure_command = './configure %s --prefix=%s' % ( parsed_arguments.custom_configure_flags, install_prefix) shell_call(configure_command, parsed_arguments.verbose, environment) shell_call('make -j%s' % parsed_arguments.jobs, parsed_arguments.verbose, environment) shell_call('make -j%s install' % parsed_arguments.jobs, parsed_arguments.verbose, environment) def nss_make_and_copy(parsed_arguments, environment, install_prefix): # NSS uses a build system that's different from configure/make/install. All # flags must be passed as arguments to make. make_args = [] # Do an optimized build. make_args.append('BUILD_OPT=1') # Set USE_64=1 on x86_64 systems. if platform.architecture()[0] == '64bit': make_args.append('USE_64=1') # Passing C(XX)FLAGS overrides the defaults, and EXTRA_C(XX)FLAGS is not # supported. Append our extra flags to CC/CXX. make_args.append('CC="%s %s"' % (environment['CC'], environment['CFLAGS'])) make_args.append('CXX="%s %s"' % (environment['CXX'], environment['CXXFLAGS'])) # We need to override ZDEFS_FLAGS at least to prevent -Wl,-z,defs. # Might as well use this to pass the linker flags, since ZDEF_FLAGS is always # added during linking on Linux. make_args.append('ZDEFS_FLAG="-Wl,-z,nodefs %s"' % environment['LDFLAGS']) make_args.append('NSPR_INCLUDE_DIR=/usr/include/nspr') make_args.append('NSPR_LIB_DIR=%s/lib' % install_prefix) # -j is not supported shell_call('make %s' % ' '.join(make_args), parsed_arguments.verbose, environment) # 'make install' is not supported. Copy the DSOs manually. install_dir = '%s/lib/' % install_prefix for (dirpath, dirnames, filenames) in os.walk('./lib/'): for filename in filenames: if filename.endswith('.so'): full_path = os.path.join(dirpath, filename) if parsed_arguments.verbose: print "download_build_install.py: installing %s" % full_path shutil.copy(full_path, install_dir) def download_build_install(parsed_arguments): sanitizer_params = SUPPORTED_SANITIZERS[parsed_arguments.sanitizer_type] environment = os.environ.copy() # Usage of environment variables CC and CXX prefers usage flags --c-compiler # and --cxx-compiler if 'CC' not in environment and parsed_arguments.c_compiler: environment['CC'] = parsed_arguments.c_compiler if 'CXX' not in environment and parsed_arguments.cxx_compiler: environment['CXX'] = parsed_arguments.cxx_compiler environment['CFLAGS'] = '%s %s' % (sanitizer_params['compiler_flags'], parsed_arguments.custom_c_compiler_flags) environment['CXXFLAGS'] = '%s %s' % (sanitizer_params['compiler_flags'], parsed_arguments.custom_cxx_compiler_flags) install_prefix = '%s/%s/instrumented_libraries/%s' % ( get_script_absolute_path(), parsed_arguments.product_directory, parsed_arguments.sanitizer_type) # Make sure the linker searches the instrumented libraries dir for # library dependencies. environment['LDFLAGS'] = '%s -L%s/lib %s' % (sanitizer_params['linker_flags'], install_prefix, parsed_arguments.custom_linker_flags) library_directory = '%s/%s' % (parsed_arguments.intermediate_directory, parsed_arguments.library) if not os.path.exists(library_directory): os.makedirs(library_directory) with ScopedChangeDirectory(library_directory) as cd_library: shell_call('apt-get source %s' % parsed_arguments.library, parsed_arguments.verbose) # There should be exactly one subdirectory after downloading a package. subdirectories = [d for d in os.listdir('.') if os.path.isdir(d)] if len(subdirectories) != 1: raise (Exception('There was not one directory after downloading ' 'a package %s' % parsed_arguments.library)) with ScopedChangeDirectory(subdirectories[0]): # Here we are in the package directory. if parsed_arguments.run_before_build: shell_call('%s/%s' % (os.path.relpath(cd_library.old_path), parsed_arguments.run_before_build), parsed_arguments.verbose) try: if parsed_arguments.library == 'nss': with ScopedChangeDirectory('nss') as cd_nss: nss_make_and_copy(parsed_arguments, environment, install_prefix) else: configure_make_install(parsed_arguments, environment, install_prefix) except Exception as exception: print exception print "Failed to build library %s." % parsed_arguments.library print ("Probably, some of its dependencies are not installed: %s" % ' '.join(get_library_build_dependencies(parsed_arguments.library))) sys.exit(1) # Touch a txt file to indicate library is installed. open('%s/%s.txt' % (install_prefix, parsed_arguments.library), 'w').close() # Remove downloaded package and generated temporary build files. shutil.rmtree(library_directory) def main(): argument_parser = argparse.ArgumentParser( description = 'Download, build and install instrumented library') argument_parser.add_argument('-j', '--jobs', type=int, default=1) argument_parser.add_argument('-l', '--library', required=True) argument_parser.add_argument('-i', '--product-directory', default='.', help='Relative path to the directory with chrome binaries') argument_parser.add_argument('-m', '--intermediate-directory', default='.', help='Relative path to the directory for temporary build files') argument_parser.add_argument('--custom-configure-flags', default='') argument_parser.add_argument('--custom-c-compiler-flags', default='') argument_parser.add_argument('--custom-cxx-compiler-flags', default='') argument_parser.add_argument('--custom-linker-flags', default='') argument_parser.add_argument('-s', '--sanitizer-type', required=True, choices=SUPPORTED_SANITIZERS.keys()) argument_parser.add_argument('-v', '--verbose', action='store_true') argument_parser.add_argument('--check-build-deps', action='store_true') argument_parser.add_argument('--c-compiler') argument_parser.add_argument('--cxx-compiler') # This should be a shell script to run before building specific libraries # e.g. extracting archives with sources, patching makefiles, etc. argument_parser.add_argument('--run-before-build', default='') # Ignore all empty arguments because in several cases gyp passes them to the # script, but ArgumentParser treats them as positional arguments instead of # ignoring (and doesn't have such options). parsed_arguments = argument_parser.parse_args( [arg for arg in sys.argv[1:] if len(arg) != 0]) # Ensure current working directory is this script directory. os.chdir(get_script_absolute_path()) # Ensure all build dependencies are installed. if parsed_arguments.check_build_deps: check_library_build_dependencies(parsed_arguments.library) download_build_install(parsed_arguments) if __name__ == '__main__': main()