You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
261 lines
8.2 KiB
261 lines
8.2 KiB
# -*- coding: utf-8 -*-
|
|
# The LLVM Compiler Infrastructure
|
|
#
|
|
# This file is distributed under the University of Illinois Open Source
|
|
# License. See LICENSE.TXT for details.
|
|
""" This module compiles the intercept library. """
|
|
|
|
import sys
|
|
import os
|
|
import os.path
|
|
import re
|
|
import tempfile
|
|
import shutil
|
|
import contextlib
|
|
import logging
|
|
|
|
__all__ = ['build_libear']
|
|
|
|
|
|
def build_libear(compiler, dst_dir):
|
|
""" Returns the full path to the 'libear' library. """
|
|
|
|
try:
|
|
src_dir = os.path.dirname(os.path.realpath(__file__))
|
|
toolset = make_toolset(src_dir)
|
|
toolset.set_compiler(compiler)
|
|
toolset.set_language_standard('c99')
|
|
toolset.add_definitions(['-D_GNU_SOURCE'])
|
|
|
|
configure = do_configure(toolset)
|
|
configure.check_function_exists('execve', 'HAVE_EXECVE')
|
|
configure.check_function_exists('execv', 'HAVE_EXECV')
|
|
configure.check_function_exists('execvpe', 'HAVE_EXECVPE')
|
|
configure.check_function_exists('execvp', 'HAVE_EXECVP')
|
|
configure.check_function_exists('execvP', 'HAVE_EXECVP2')
|
|
configure.check_function_exists('exect', 'HAVE_EXECT')
|
|
configure.check_function_exists('execl', 'HAVE_EXECL')
|
|
configure.check_function_exists('execlp', 'HAVE_EXECLP')
|
|
configure.check_function_exists('execle', 'HAVE_EXECLE')
|
|
configure.check_function_exists('posix_spawn', 'HAVE_POSIX_SPAWN')
|
|
configure.check_function_exists('posix_spawnp', 'HAVE_POSIX_SPAWNP')
|
|
configure.check_symbol_exists('_NSGetEnviron', 'crt_externs.h',
|
|
'HAVE_NSGETENVIRON')
|
|
configure.write_by_template(
|
|
os.path.join(src_dir, 'config.h.in'),
|
|
os.path.join(dst_dir, 'config.h'))
|
|
|
|
target = create_shared_library('ear', toolset)
|
|
target.add_include(dst_dir)
|
|
target.add_sources('ear.c')
|
|
target.link_against(toolset.dl_libraries())
|
|
target.link_against(['pthread'])
|
|
target.build_release(dst_dir)
|
|
|
|
return os.path.join(dst_dir, target.name)
|
|
|
|
except Exception:
|
|
logging.info("Could not build interception library.", exc_info=True)
|
|
return None
|
|
|
|
|
|
def execute(cmd, *args, **kwargs):
|
|
""" Make subprocess execution silent. """
|
|
|
|
import subprocess
|
|
kwargs.update({'stdout': subprocess.PIPE, 'stderr': subprocess.STDOUT})
|
|
return subprocess.check_call(cmd, *args, **kwargs)
|
|
|
|
|
|
@contextlib.contextmanager
|
|
def TemporaryDirectory(**kwargs):
|
|
name = tempfile.mkdtemp(**kwargs)
|
|
try:
|
|
yield name
|
|
finally:
|
|
shutil.rmtree(name)
|
|
|
|
|
|
class Toolset(object):
|
|
""" Abstract class to represent different toolset. """
|
|
|
|
def __init__(self, src_dir):
|
|
self.src_dir = src_dir
|
|
self.compiler = None
|
|
self.c_flags = []
|
|
|
|
def set_compiler(self, compiler):
|
|
""" part of public interface """
|
|
self.compiler = compiler
|
|
|
|
def set_language_standard(self, standard):
|
|
""" part of public interface """
|
|
self.c_flags.append('-std=' + standard)
|
|
|
|
def add_definitions(self, defines):
|
|
""" part of public interface """
|
|
self.c_flags.extend(defines)
|
|
|
|
def dl_libraries(self):
|
|
raise NotImplementedError()
|
|
|
|
def shared_library_name(self, name):
|
|
raise NotImplementedError()
|
|
|
|
def shared_library_c_flags(self, release):
|
|
extra = ['-DNDEBUG', '-O3'] if release else []
|
|
return extra + ['-fPIC'] + self.c_flags
|
|
|
|
def shared_library_ld_flags(self, release, name):
|
|
raise NotImplementedError()
|
|
|
|
|
|
class DarwinToolset(Toolset):
|
|
def __init__(self, src_dir):
|
|
Toolset.__init__(self, src_dir)
|
|
|
|
def dl_libraries(self):
|
|
return []
|
|
|
|
def shared_library_name(self, name):
|
|
return 'lib' + name + '.dylib'
|
|
|
|
def shared_library_ld_flags(self, release, name):
|
|
extra = ['-dead_strip'] if release else []
|
|
return extra + ['-dynamiclib', '-install_name', '@rpath/' + name]
|
|
|
|
|
|
class UnixToolset(Toolset):
|
|
def __init__(self, src_dir):
|
|
Toolset.__init__(self, src_dir)
|
|
|
|
def dl_libraries(self):
|
|
return []
|
|
|
|
def shared_library_name(self, name):
|
|
return 'lib' + name + '.so'
|
|
|
|
def shared_library_ld_flags(self, release, name):
|
|
extra = [] if release else []
|
|
return extra + ['-shared', '-Wl,-soname,' + name]
|
|
|
|
|
|
class LinuxToolset(UnixToolset):
|
|
def __init__(self, src_dir):
|
|
UnixToolset.__init__(self, src_dir)
|
|
|
|
def dl_libraries(self):
|
|
return ['dl']
|
|
|
|
|
|
def make_toolset(src_dir):
|
|
platform = sys.platform
|
|
if platform in {'win32', 'cygwin'}:
|
|
raise RuntimeError('not implemented on this platform')
|
|
elif platform == 'darwin':
|
|
return DarwinToolset(src_dir)
|
|
elif platform in {'linux', 'linux2'}:
|
|
return LinuxToolset(src_dir)
|
|
else:
|
|
return UnixToolset(src_dir)
|
|
|
|
|
|
class Configure(object):
|
|
def __init__(self, toolset):
|
|
self.ctx = toolset
|
|
self.results = {'APPLE': sys.platform == 'darwin'}
|
|
|
|
def _try_to_compile_and_link(self, source):
|
|
try:
|
|
with TemporaryDirectory() as work_dir:
|
|
src_file = 'check.c'
|
|
with open(os.path.join(work_dir, src_file), 'w') as handle:
|
|
handle.write(source)
|
|
|
|
execute([self.ctx.compiler, src_file] + self.ctx.c_flags,
|
|
cwd=work_dir)
|
|
return True
|
|
except Exception:
|
|
return False
|
|
|
|
def check_function_exists(self, function, name):
|
|
template = "int FUNCTION(); int main() { return FUNCTION(); }"
|
|
source = template.replace("FUNCTION", function)
|
|
|
|
logging.debug('Checking function %s', function)
|
|
found = self._try_to_compile_and_link(source)
|
|
logging.debug('Checking function %s -- %s', function,
|
|
'found' if found else 'not found')
|
|
self.results.update({name: found})
|
|
|
|
def check_symbol_exists(self, symbol, include, name):
|
|
template = """#include <INCLUDE>
|
|
int main() { return ((int*)(&SYMBOL))[0]; }"""
|
|
source = template.replace('INCLUDE', include).replace("SYMBOL", symbol)
|
|
|
|
logging.debug('Checking symbol %s', symbol)
|
|
found = self._try_to_compile_and_link(source)
|
|
logging.debug('Checking symbol %s -- %s', symbol,
|
|
'found' if found else 'not found')
|
|
self.results.update({name: found})
|
|
|
|
def write_by_template(self, template, output):
|
|
def transform(line, definitions):
|
|
|
|
pattern = re.compile(r'^#cmakedefine\s+(\S+)')
|
|
m = pattern.match(line)
|
|
if m:
|
|
key = m.group(1)
|
|
if key not in definitions or not definitions[key]:
|
|
return '/* #undef {} */\n'.format(key)
|
|
else:
|
|
return '#define {}\n'.format(key)
|
|
return line
|
|
|
|
with open(template, 'r') as src_handle:
|
|
logging.debug('Writing config to %s', output)
|
|
with open(output, 'w') as dst_handle:
|
|
for line in src_handle:
|
|
dst_handle.write(transform(line, self.results))
|
|
|
|
|
|
def do_configure(toolset):
|
|
return Configure(toolset)
|
|
|
|
|
|
class SharedLibrary(object):
|
|
def __init__(self, name, toolset):
|
|
self.name = toolset.shared_library_name(name)
|
|
self.ctx = toolset
|
|
self.inc = []
|
|
self.src = []
|
|
self.lib = []
|
|
|
|
def add_include(self, directory):
|
|
self.inc.extend(['-I', directory])
|
|
|
|
def add_sources(self, source):
|
|
self.src.append(source)
|
|
|
|
def link_against(self, libraries):
|
|
self.lib.extend(['-l' + lib for lib in libraries])
|
|
|
|
def build_release(self, directory):
|
|
for src in self.src:
|
|
logging.debug('Compiling %s', src)
|
|
execute(
|
|
[self.ctx.compiler, '-c', os.path.join(self.ctx.src_dir, src),
|
|
'-o', src + '.o'] + self.inc +
|
|
self.ctx.shared_library_c_flags(True),
|
|
cwd=directory)
|
|
logging.debug('Linking %s', self.name)
|
|
execute(
|
|
[self.ctx.compiler] + [src + '.o' for src in self.src] +
|
|
['-o', self.name] + self.lib +
|
|
self.ctx.shared_library_ld_flags(True, self.name),
|
|
cwd=directory)
|
|
|
|
|
|
def create_shared_library(name, toolset):
|
|
return SharedLibrary(name, toolset)
|