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config.py
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config.py
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#===----------------------------------------------------------------------===##
#
# The LLVM Compiler Infrastructure
#
# This file is dual licensed under the MIT and the University of Illinois Open
# Source Licenses. See LICENSE.TXT for details.
#
#===----------------------------------------------------------------------===##
import locale
import os
import platform
import pkgutil
import pipes
import re
import shlex
import shutil
import sys
from libcxx.compiler import CXXCompiler
from libcxx.test.target_info import make_target_info
from libcxx.test.executor import *
from libcxx.test.tracing import *
import libcxx.util
def loadSiteConfig(lit_config, config, param_name, env_name):
# We haven't loaded the site specific configuration (the user is
# probably trying to run on a test file directly, and either the site
# configuration hasn't been created by the build system, or we are in an
# out-of-tree build situation).
site_cfg = lit_config.params.get(param_name,
os.environ.get(env_name))
if not site_cfg:
lit_config.warning('No site specific configuration file found!'
' Running the tests in the default configuration.')
elif not os.path.isfile(site_cfg):
lit_config.fatal(
"Specified site configuration file does not exist: '%s'" %
site_cfg)
else:
lit_config.note('using site specific configuration at %s' % site_cfg)
ld_fn = lit_config.load_config
# Null out the load_config function so that lit.site.cfg doesn't
# recursively load a config even if it tries.
# TODO: This is one hell of a hack. Fix it.
def prevent_reload_fn(*args, **kwargs):
pass
lit_config.load_config = prevent_reload_fn
ld_fn(config, site_cfg)
lit_config.load_config = ld_fn
class Configuration(object):
# pylint: disable=redefined-outer-name
def __init__(self, lit_config, config):
self.lit_config = lit_config
self.config = config
self.is_windows = platform.system() == 'Windows'
self.cxx = None
self.cxx_is_clang_cl = None
self.cxx_stdlib_under_test = None
self.project_obj_root = None
self.libcxx_src_root = None
self.libcxx_obj_root = None
self.cxx_library_root = None
self.cxx_runtime_root = None
self.abi_library_root = None
self.link_shared = self.get_lit_bool('enable_shared', default=True)
self.debug_build = self.get_lit_bool('debug_build', default=False)
self.exec_env = dict(os.environ)
self.use_target = False
self.use_system_cxx_lib = False
self.use_clang_verify = False
self.long_tests = None
self.execute_external = False
def get_lit_conf(self, name, default=None):
val = self.lit_config.params.get(name, None)
if val is None:
val = getattr(self.config, name, None)
if val is None:
val = default
return val
def get_lit_bool(self, name, default=None, env_var=None):
def check_value(value, var_name):
if value is None:
return default
if isinstance(value, bool):
return value
if not isinstance(value, str):
raise TypeError('expected bool or string')
if value.lower() in ('1', 'true'):
return True
if value.lower() in ('', '0', 'false'):
return False
self.lit_config.fatal(
"parameter '{}' should be true or false".format(var_name))
conf_val = self.get_lit_conf(name)
if env_var is not None and env_var in os.environ and \
os.environ[env_var] is not None:
val = os.environ[env_var]
if conf_val is not None:
self.lit_config.warning(
'Environment variable %s=%s is overriding explicit '
'--param=%s=%s' % (env_var, val, name, conf_val))
return check_value(val, env_var)
return check_value(conf_val, name)
def get_modules_enabled(self):
return self.get_lit_bool('enable_modules',
default=False,
env_var='LIBCXX_ENABLE_MODULES')
def make_static_lib_name(self, name):
"""Return the full filename for the specified library name"""
if self.is_windows:
assert name == 'c++' # Only allow libc++ to use this function for now.
return 'lib' + name + '.lib'
else:
return 'lib' + name + '.a'
def configure(self):
self.configure_executor()
self.configure_use_system_cxx_lib()
self.configure_target_info()
self.configure_cxx()
self.configure_triple()
self.configure_deployment()
self.configure_availability()
self.configure_src_root()
self.configure_obj_root()
self.configure_cxx_stdlib_under_test()
self.configure_cxx_library_root()
self.configure_use_clang_verify()
self.configure_use_thread_safety()
self.configure_execute_external()
self.configure_ccache()
self.configure_compile_flags()
self.configure_filesystem_compile_flags()
self.configure_link_flags()
self.configure_env()
self.configure_color_diagnostics()
self.configure_debug_mode()
self.configure_warnings()
self.configure_sanitizer()
self.configure_coverage()
self.configure_modules()
self.configure_coroutines()
self.configure_substitutions()
self.configure_features()
def print_config_info(self):
# Print the final compile and link flags.
self.lit_config.note('Using compiler: %s' % self.cxx.path)
self.lit_config.note('Using flags: %s' % self.cxx.flags)
if self.cxx.use_modules:
self.lit_config.note('Using modules flags: %s' %
self.cxx.modules_flags)
self.lit_config.note('Using compile flags: %s'
% self.cxx.compile_flags)
if len(self.cxx.warning_flags):
self.lit_config.note('Using warnings: %s' % self.cxx.warning_flags)
self.lit_config.note('Using link flags: %s' % self.cxx.link_flags)
# Print as list to prevent "set([...])" from being printed.
self.lit_config.note('Using available_features: %s' %
list(self.config.available_features))
show_env_vars = {}
for k,v in self.exec_env.items():
if k not in os.environ or os.environ[k] != v:
show_env_vars[k] = v
self.lit_config.note('Adding environment variables: %r' % show_env_vars)
sys.stderr.flush() # Force flushing to avoid broken output on Windows
def get_test_format(self):
from libcxx.test.format import LibcxxTestFormat
return LibcxxTestFormat(
self.cxx,
self.use_clang_verify,
self.execute_external,
self.executor,
exec_env=self.exec_env)
def configure_executor(self):
exec_str = self.get_lit_conf('executor', "None")
te = eval(exec_str)
if te:
self.lit_config.note("Using executor: %r" % exec_str)
if self.lit_config.useValgrind:
# We have no way of knowing where in the chain the
# ValgrindExecutor is supposed to go. It is likely
# that the user wants it at the end, but we have no
# way of getting at that easily.
selt.lit_config.fatal("Cannot infer how to create a Valgrind "
" executor.")
else:
te = LocalExecutor()
if self.lit_config.useValgrind:
te = ValgrindExecutor(self.lit_config.valgrindArgs, te)
self.executor = te
def configure_target_info(self):
self.target_info = make_target_info(self)
def configure_cxx(self):
# Gather various compiler parameters.
cxx = self.get_lit_conf('cxx_under_test')
self.cxx_is_clang_cl = cxx is not None and \
os.path.basename(cxx) == 'clang-cl.exe'
# If no specific cxx_under_test was given, attempt to infer it as
# clang++.
if cxx is None or self.cxx_is_clang_cl:
search_paths = self.config.environment['PATH']
if cxx is not None and os.path.isabs(cxx):
search_paths = os.path.dirname(cxx)
clangxx = libcxx.util.which('clang++', search_paths)
if clangxx:
cxx = clangxx
self.lit_config.note(
"inferred cxx_under_test as: %r" % cxx)
elif self.cxx_is_clang_cl:
self.lit_config.fatal('Failed to find clang++ substitution for'
' clang-cl')
if not cxx:
self.lit_config.fatal('must specify user parameter cxx_under_test '
'(e.g., --param=cxx_under_test=clang++)')
self.cxx = CXXCompiler(cxx) if not self.cxx_is_clang_cl else \
self._configure_clang_cl(cxx)
cxx_type = self.cxx.type
if cxx_type is not None:
assert self.cxx.version is not None
maj_v, min_v, _ = self.cxx.version
self.config.available_features.add(cxx_type)
self.config.available_features.add('%s-%s' % (cxx_type, maj_v))
self.config.available_features.add('%s-%s.%s' % (
cxx_type, maj_v, min_v))
self.cxx.compile_env = dict(os.environ)
# 'CCACHE_CPP2' prevents ccache from stripping comments while
# preprocessing. This is required to prevent stripping of '-verify'
# comments.
self.cxx.compile_env['CCACHE_CPP2'] = '1'
def _configure_clang_cl(self, clang_path):
def _split_env_var(var):
return [p.strip() for p in os.environ.get(var, '').split(';') if p.strip()]
def _prefixed_env_list(var, prefix):
from itertools import chain
return list(chain.from_iterable((prefix, path) for path in _split_env_var(var)))
assert self.cxx_is_clang_cl
flags = []
compile_flags = _prefixed_env_list('INCLUDE', '-isystem')
link_flags = _prefixed_env_list('LIB', '-L')
for path in _split_env_var('LIB'):
self.add_path(self.exec_env, path)
return CXXCompiler(clang_path, flags=flags,
compile_flags=compile_flags,
link_flags=link_flags)
def _dump_macros_verbose(self, *args, **kwargs):
macros_or_error = self.cxx.dumpMacros(*args, **kwargs)
if isinstance(macros_or_error, tuple):
cmd, out, err, rc = macros_or_error
report = libcxx.util.makeReport(cmd, out, err, rc)
report += "Compiler failed unexpectedly when dumping macros!"
self.lit_config.fatal(report)
return None
assert isinstance(macros_or_error, dict)
return macros_or_error
def configure_src_root(self):
self.libcxx_src_root = self.get_lit_conf(
'libcxx_src_root', os.path.dirname(self.config.test_source_root))
def configure_obj_root(self):
self.project_obj_root = self.get_lit_conf('project_obj_root')
self.libcxx_obj_root = self.get_lit_conf('libcxx_obj_root')
if not self.libcxx_obj_root and self.project_obj_root is not None:
possible_root = os.path.join(self.project_obj_root, 'projects', 'libcxx')
if os.path.isdir(possible_root):
self.libcxx_obj_root = possible_root
else:
self.libcxx_obj_root = self.project_obj_root
def configure_cxx_library_root(self):
self.cxx_library_root = self.get_lit_conf('cxx_library_root',
self.libcxx_obj_root)
self.cxx_runtime_root = self.get_lit_conf('cxx_runtime_root',
self.cxx_library_root)
def configure_use_system_cxx_lib(self):
# This test suite supports testing against either the system library or
# the locally built one; the former mode is useful for testing ABI
# compatibility between the current headers and a shipping dynamic
# library.
# Default to testing against the locally built libc++ library.
self.use_system_cxx_lib = self.get_lit_conf('use_system_cxx_lib')
if self.use_system_cxx_lib == 'true':
self.use_system_cxx_lib = True
elif self.use_system_cxx_lib == 'false':
self.use_system_cxx_lib = False
elif self.use_system_cxx_lib:
assert os.path.isdir(self.use_system_cxx_lib)
self.lit_config.note(
"inferred use_system_cxx_lib as: %r" % self.use_system_cxx_lib)
def configure_availability(self):
# See http://llvm.org/docs/AvailabilityMarkup.html
self.with_availability = self.get_lit_bool('with_availability', False)
self.lit_config.note(
"inferred with_availability as: %r" % self.with_availability)
def configure_cxx_stdlib_under_test(self):
self.cxx_stdlib_under_test = self.get_lit_conf(
'cxx_stdlib_under_test', 'libc++')
if self.cxx_stdlib_under_test not in \
['libc++', 'libstdc++', 'msvc', 'cxx_default']:
self.lit_config.fatal(
'unsupported value for "cxx_stdlib_under_test": %s'
% self.cxx_stdlib_under_test)
self.config.available_features.add(self.cxx_stdlib_under_test)
if self.cxx_stdlib_under_test == 'libstdc++':
self.config.available_features.add('libstdc++')
# Manually enable the experimental and filesystem tests for libstdc++
# if the options aren't present.
# FIXME this is a hack.
if self.get_lit_conf('enable_experimental') is None:
self.config.enable_experimental = 'true'
if self.get_lit_conf('enable_filesystem') is None:
self.config.enable_filesystem = 'true'
def configure_use_clang_verify(self):
'''If set, run clang with -verify on failing tests.'''
if self.with_availability:
self.use_clang_verify = False
return
self.use_clang_verify = self.get_lit_bool('use_clang_verify')
if self.use_clang_verify is None:
# NOTE: We do not test for the -verify flag directly because
# -verify will always exit with non-zero on an empty file.
self.use_clang_verify = self.cxx.isVerifySupported()
self.lit_config.note(
"inferred use_clang_verify as: %r" % self.use_clang_verify)
if self.use_clang_verify:
self.config.available_features.add('verify-support')
def configure_use_thread_safety(self):
'''If set, run clang with -verify on failing tests.'''
has_thread_safety = self.cxx.hasCompileFlag('-Werror=thread-safety')
if has_thread_safety:
self.cxx.compile_flags += ['-Werror=thread-safety']
self.config.available_features.add('thread-safety')
self.lit_config.note("enabling thread-safety annotations")
def configure_execute_external(self):
# Choose between lit's internal shell pipeline runner and a real shell.
# If LIT_USE_INTERNAL_SHELL is in the environment, we use that as the
# default value. Otherwise we ask the target_info.
use_lit_shell_default = os.environ.get('LIT_USE_INTERNAL_SHELL')
if use_lit_shell_default is not None:
use_lit_shell_default = use_lit_shell_default != '0'
else:
use_lit_shell_default = self.target_info.use_lit_shell_default()
# Check for the command line parameter using the default value if it is
# not present.
use_lit_shell = self.get_lit_bool('use_lit_shell',
use_lit_shell_default)
self.execute_external = not use_lit_shell
def configure_ccache(self):
use_ccache_default = os.environ.get('LIBCXX_USE_CCACHE') is not None
use_ccache = self.get_lit_bool('use_ccache', use_ccache_default)
if use_ccache:
self.cxx.use_ccache = True
self.lit_config.note('enabling ccache')
def add_deployment_feature(self, feature):
(arch, name, version) = self.config.deployment
self.config.available_features.add('%s=%s-%s' % (feature, arch, name))
self.config.available_features.add('%s=%s' % (feature, name))
self.config.available_features.add('%s=%s%s' % (feature, name, version))
def configure_features(self):
additional_features = self.get_lit_conf('additional_features')
if additional_features:
for f in additional_features.split(','):
self.config.available_features.add(f.strip())
self.target_info.add_locale_features(self.config.available_features)
target_platform = self.target_info.platform()
# Write an "available feature" that combines the triple when
# use_system_cxx_lib is enabled. This is so that we can easily write
# XFAIL markers for tests that are known to fail with versions of
# libc++ as were shipped with a particular triple.
if self.use_system_cxx_lib:
self.config.available_features.add('with_system_cxx_lib')
self.config.available_features.add(
'with_system_cxx_lib=%s' % self.config.target_triple)
# Add subcomponents individually.
target_components = self.config.target_triple.split('-')
for component in target_components:
self.config.available_features.add(
'with_system_cxx_lib=%s' % component)
# Add available features for more generic versions of the target
# triple attached to with_system_cxx_lib.
if self.use_deployment:
self.add_deployment_feature('with_system_cxx_lib')
# Configure the availability markup checks features.
if self.with_availability:
self.config.available_features.add('availability_markup')
self.add_deployment_feature('availability_markup')
if self.use_system_cxx_lib or self.with_availability:
self.config.available_features.add('availability')
self.add_deployment_feature('availability')
if platform.system() == 'Darwin':
self.config.available_features.add('apple-darwin')
# Insert the platform name into the available features as a lower case.
self.config.available_features.add(target_platform)
# Simulator testing can take a really long time for some of these tests
# so add a feature check so we can REQUIRES: long_tests in them
self.long_tests = self.get_lit_bool('long_tests')
if self.long_tests is None:
# Default to running long tests.
self.long_tests = True
self.lit_config.note(
"inferred long_tests as: %r" % self.long_tests)
if self.long_tests:
self.config.available_features.add('long_tests')
# Run a compile test for the -fsized-deallocation flag. This is needed
# in test/std/language.support/support.dynamic/new.delete
if self.cxx.hasCompileFlag('-fsized-deallocation'):
self.config.available_features.add('fsized-deallocation')
if self.cxx.hasCompileFlag('-faligned-allocation'):
self.config.available_features.add('-faligned-allocation')
else:
# FIXME remove this once more than just clang-4.0 support
# C++17 aligned allocation.
self.config.available_features.add('no-aligned-allocation')
if self.cxx.hasCompileFlag('-fdelayed-template-parsing'):
self.config.available_features.add('fdelayed-template-parsing')
if self.get_lit_bool('has_libatomic', False):
self.config.available_features.add('libatomic')
macros = self._dump_macros_verbose()
if '__cpp_if_constexpr' not in macros:
self.config.available_features.add('libcpp-no-if-constexpr')
if '__cpp_structured_bindings' not in macros:
self.config.available_features.add('libcpp-no-structured-bindings')
if '__cpp_deduction_guides' not in macros or \
int(macros['__cpp_deduction_guides']) < 201611:
self.config.available_features.add('libcpp-no-deduction-guides')
if self.is_windows:
self.config.available_features.add('windows')
if self.cxx_stdlib_under_test == 'libc++':
# LIBCXX-WINDOWS-FIXME is the feature name used to XFAIL the
# initial Windows failures until they can be properly diagnosed
# and fixed. This allows easier detection of new test failures
# and regressions. Note: New failures should not be suppressed
# using this feature. (Also see llvm.org/PR32730)
self.config.available_features.add('LIBCXX-WINDOWS-FIXME')
# Attempt to detect the glibc version by querying for __GLIBC__
# in 'features.h'.
macros = self.cxx.dumpMacros(flags=['-include', 'features.h'])
if isinstance(macros, dict) and '__GLIBC__' in macros:
maj_v, min_v = (macros['__GLIBC__'], macros['__GLIBC_MINOR__'])
self.config.available_features.add('glibc')
self.config.available_features.add('glibc-%s' % maj_v)
self.config.available_features.add('glibc-%s.%s' % (maj_v, min_v))
# Support Objective-C++ only on MacOS and if the compiler supports it.
if self.target_info.platform() == "darwin" and \
self.target_info.is_host_macosx() and \
self.cxx.hasCompileFlag(["-x", "objective-c++", "-fobjc-arc"]):
self.config.available_features.add("objective-c++")
def configure_compile_flags(self):
no_default_flags = self.get_lit_bool('no_default_flags', False)
if not no_default_flags:
self.configure_default_compile_flags()
# This include is always needed so add so add it regardless of
# 'no_default_flags'.
support_path = os.path.join(self.libcxx_src_root, 'test/support')
self.cxx.compile_flags += ['-I' + support_path]
# Configure extra flags
compile_flags_str = self.get_lit_conf('compile_flags', '')
self.cxx.compile_flags += shlex.split(compile_flags_str)
if self.is_windows:
# FIXME: Can we remove this?
self.cxx.compile_flags += ['-D_CRT_SECURE_NO_WARNINGS']
# Required so that tests using min/max don't fail on Windows,
# and so that those tests don't have to be changed to tolerate
# this insanity.
self.cxx.compile_flags += ['-DNOMINMAX']
additional_flags = self.get_lit_conf('test_compiler_flags')
if additional_flags:
self.cxx.compile_flags += shlex.split(additional_flags)
def configure_default_compile_flags(self):
# Try and get the std version from the command line. Fall back to
# default given in lit.site.cfg is not present. If default is not
# present then force c++11.
std = self.get_lit_conf('std')
if not std:
# Choose the newest possible language dialect if none is given.
possible_stds = ['c++2a', 'c++17', 'c++1z', 'c++14', 'c++11',
'c++03']
if self.cxx.type == 'gcc':
maj_v, _, _ = self.cxx.version
maj_v = int(maj_v)
if maj_v < 7:
possible_stds.remove('c++1z')
# FIXME: How many C++14 tests actually fail under GCC 5 and 6?
# Should we XFAIL them individually instead?
if maj_v <= 6:
possible_stds.remove('c++14')
for s in possible_stds:
if self.cxx.hasCompileFlag('-std=%s' % s):
std = s
self.lit_config.note(
'inferred language dialect as: %s' % std)
break
if not std:
self.lit_config.fatal(
'Failed to infer a supported language dialect from one of %r'
% possible_stds)
self.cxx.compile_flags += ['-std={0}'.format(std)]
std_feature = std.replace('gnu++', 'c++')
std_feature = std.replace('1z', '17')
self.config.available_features.add(std_feature)
# Configure include paths
self.configure_compile_flags_header_includes()
self.target_info.add_cxx_compile_flags(self.cxx.compile_flags)
# Configure feature flags.
self.configure_compile_flags_exceptions()
self.configure_compile_flags_rtti()
self.configure_compile_flags_abi_version()
enable_32bit = self.get_lit_bool('enable_32bit', False)
if enable_32bit:
self.cxx.flags += ['-m32']
# Use verbose output for better errors
self.cxx.flags += ['-v']
sysroot = self.get_lit_conf('sysroot')
if sysroot:
self.cxx.flags += ['--sysroot', sysroot]
gcc_toolchain = self.get_lit_conf('gcc_toolchain')
if gcc_toolchain:
self.cxx.flags += ['-gcc-toolchain', gcc_toolchain]
# NOTE: the _DEBUG definition must preceed the triple check because for
# the Windows build of libc++, the forced inclusion of a header requires
# that _DEBUG is defined. Incorrect ordering will result in -target
# being elided.
if self.is_windows and self.debug_build:
self.cxx.compile_flags += ['-D_DEBUG']
if self.use_target:
if not self.cxx.addFlagIfSupported(
['-target', self.config.target_triple]):
self.lit_config.warning('use_target is true but -target is '\
'not supported by the compiler')
if self.use_deployment:
arch, name, version = self.config.deployment
self.cxx.flags += ['-arch', arch]
self.cxx.flags += ['-m' + name + '-version-min=' + version]
# Disable availability unless explicitely requested
if not self.with_availability:
self.cxx.flags += ['-D_LIBCPP_DISABLE_AVAILABILITY']
# FIXME(EricWF): variant_size.pass.cpp requires a slightly larger
# template depth with older Clang versions.
self.cxx.addFlagIfSupported('-ftemplate-depth=270')
def configure_compile_flags_header_includes(self):
support_path = os.path.join(self.libcxx_src_root, 'test', 'support')
self.configure_config_site_header()
if self.cxx_stdlib_under_test != 'libstdc++' and \
not self.is_windows:
self.cxx.compile_flags += [
'-include', os.path.join(support_path, 'nasty_macros.hpp')]
if self.cxx_stdlib_under_test == 'msvc':
self.cxx.compile_flags += [
'-include', os.path.join(support_path,
'msvc_stdlib_force_include.hpp')]
pass
if self.is_windows and self.debug_build and \
self.cxx_stdlib_under_test != 'msvc':
self.cxx.compile_flags += [
'-include', os.path.join(support_path,
'set_windows_crt_report_mode.h')
]
cxx_headers = self.get_lit_conf('cxx_headers')
if cxx_headers == '' or (cxx_headers is None
and self.cxx_stdlib_under_test != 'libc++'):
self.lit_config.note('using the system cxx headers')
return
self.cxx.compile_flags += ['-nostdinc++']
if cxx_headers is None:
cxx_headers = os.path.join(self.libcxx_src_root, 'include')
if not os.path.isdir(cxx_headers):
self.lit_config.fatal("cxx_headers='%s' is not a directory."
% cxx_headers)
self.cxx.compile_flags += ['-I' + cxx_headers]
if self.libcxx_obj_root is not None:
cxxabi_headers = os.path.join(self.libcxx_obj_root, 'include',
'c++build')
if os.path.isdir(cxxabi_headers):
self.cxx.compile_flags += ['-I' + cxxabi_headers]
def configure_config_site_header(self):
# Check for a possible __config_site in the build directory. We
# use this if it exists.
if self.libcxx_obj_root is None:
return
config_site_header = os.path.join(self.libcxx_obj_root, '__config_site')
if not os.path.isfile(config_site_header):
return
contained_macros = self.parse_config_site_and_add_features(
config_site_header)
self.lit_config.note('Using __config_site header %s with macros: %r'
% (config_site_header, contained_macros))
# FIXME: This must come after the call to
# 'parse_config_site_and_add_features(...)' in order for it to work.
self.cxx.compile_flags += ['-include', config_site_header]
def parse_config_site_and_add_features(self, header):
""" parse_config_site_and_add_features - Deduce and add the test
features that that are implied by the #define's in the __config_site
header. Return a dictionary containing the macros found in the
'__config_site' header.
"""
# Parse the macro contents of __config_site by dumping the macros
# using 'c++ -dM -E' and filtering the predefines.
predefines = self._dump_macros_verbose()
macros = self._dump_macros_verbose(header)
feature_macros_keys = set(macros.keys()) - set(predefines.keys())
feature_macros = {}
for k in feature_macros_keys:
feature_macros[k] = macros[k]
# We expect the header guard to be one of the definitions
assert '_LIBCPP_CONFIG_SITE' in feature_macros
del feature_macros['_LIBCPP_CONFIG_SITE']
# The __config_site header should be non-empty. Otherwise it should
# have never been emitted by CMake.
assert len(feature_macros) > 0
# FIXME: This is a hack that should be fixed using module maps (or something)
# If modules are enabled then we have to lift all of the definitions
# in __config_site onto the command line.
modules_enabled = self.get_modules_enabled()
self.cxx.compile_flags += ['-Wno-macro-redefined']
# Transform each macro name into the feature name used in the tests.
# Ex. _LIBCPP_HAS_NO_THREADS -> libcpp-has-no-threads
for m in feature_macros:
if modules_enabled:
define = '-D%s' % m
if feature_macros[m]:
define += '=%s' % (feature_macros[m])
self.cxx.compile_flags += [define]
if m == '_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS':
continue
if m == '_LIBCPP_ABI_VERSION':
self.config.available_features.add('libcpp-abi-version-v%s'
% feature_macros[m])
continue
if m == '_LIBCPP_NO_VCRUNTIME':
self.config.available_features.add('libcpp-no-vcruntime')
continue
assert m.startswith('_LIBCPP_HAS_') or m.startswith('_LIBCPP_ABI_')
m = m.lower()[1:].replace('_', '-')
self.config.available_features.add(m)
return feature_macros
def configure_compile_flags_exceptions(self):
enable_exceptions = self.get_lit_bool('enable_exceptions', True)
if not enable_exceptions:
self.config.available_features.add('libcpp-no-exceptions')
self.cxx.compile_flags += ['-fno-exceptions']
def configure_compile_flags_rtti(self):
enable_rtti = self.get_lit_bool('enable_rtti', True)
if not enable_rtti:
self.config.available_features.add('libcpp-no-rtti')
self.cxx.compile_flags += ['-fno-rtti', '-D_LIBCPP_NO_RTTI']
def configure_compile_flags_abi_version(self):
abi_version = self.get_lit_conf('abi_version', '').strip()
abi_unstable = self.get_lit_bool('abi_unstable')
# Only add the ABI version when it is non-default.
# FIXME(EricWF): Get the ABI version from the "__config_site".
if abi_version and abi_version != '1':
self.cxx.compile_flags += ['-D_LIBCPP_ABI_VERSION=' + abi_version]
if abi_unstable:
self.config.available_features.add('libcpp-abi-unstable')
self.cxx.compile_flags += ['-D_LIBCPP_ABI_UNSTABLE']
def configure_filesystem_compile_flags(self):
enable_fs = self.get_lit_bool('enable_filesystem', default=False)
if not enable_fs:
return
enable_experimental = self.get_lit_bool('enable_experimental', default=False)
if not enable_experimental:
self.lit_config.fatal(
'filesystem is enabled but libc++experimental.a is not.')
self.config.available_features.add('c++filesystem')
static_env = os.path.join(self.libcxx_src_root, 'test', 'std',
'experimental', 'filesystem', 'Inputs', 'static_test_env')
static_env = os.path.realpath(static_env)
assert os.path.isdir(static_env)
self.cxx.compile_flags += ['-DLIBCXX_FILESYSTEM_STATIC_TEST_ROOT="%s"' % static_env]
dynamic_env = os.path.join(self.config.test_exec_root,
'filesystem', 'Output', 'dynamic_env')
dynamic_env = os.path.realpath(dynamic_env)
if not os.path.isdir(dynamic_env):
os.makedirs(dynamic_env)
self.cxx.compile_flags += ['-DLIBCXX_FILESYSTEM_DYNAMIC_TEST_ROOT="%s"' % dynamic_env]
self.exec_env['LIBCXX_FILESYSTEM_DYNAMIC_TEST_ROOT'] = ("%s" % dynamic_env)
dynamic_helper = os.path.join(self.libcxx_src_root, 'test', 'support',
'filesystem_dynamic_test_helper.py')
assert os.path.isfile(dynamic_helper)
self.cxx.compile_flags += ['-DLIBCXX_FILESYSTEM_DYNAMIC_TEST_HELPER="%s %s"'
% (sys.executable, dynamic_helper)]
def configure_link_flags(self):
no_default_flags = self.get_lit_bool('no_default_flags', False)
if not no_default_flags:
# Configure library path
self.configure_link_flags_cxx_library_path()
self.configure_link_flags_abi_library_path()
# Configure libraries
if self.cxx_stdlib_under_test == 'libc++':
self.cxx.link_flags += ['-nodefaultlibs']
# FIXME: Handle MSVCRT as part of the ABI library handling.
if self.is_windows:
self.cxx.link_flags += ['-nostdlib']
self.configure_link_flags_cxx_library()
self.configure_link_flags_abi_library()
self.configure_extra_library_flags()
elif self.cxx_stdlib_under_test == 'libstdc++':
enable_fs = self.get_lit_bool('enable_filesystem',
default=False)
if enable_fs:
self.config.available_features.add('c++experimental')
self.cxx.link_flags += ['-lstdc++fs']
self.cxx.link_flags += ['-lm', '-pthread']
elif self.cxx_stdlib_under_test == 'msvc':
# FIXME: Correctly setup debug/release flags here.
pass
elif self.cxx_stdlib_under_test == 'cxx_default':
self.cxx.link_flags += ['-pthread']
else:
self.lit_config.fatal(
'unsupported value for "use_stdlib_type": %s'
% use_stdlib_type)
link_flags_str = self.get_lit_conf('link_flags', '')
self.cxx.link_flags += shlex.split(link_flags_str)
def configure_link_flags_cxx_library_path(self):
if not self.use_system_cxx_lib:
if self.cxx_library_root:
self.cxx.link_flags += ['-L' + self.cxx_library_root]
if self.is_windows and self.link_shared:
self.add_path(self.cxx.compile_env, self.cxx_library_root)
if self.cxx_runtime_root:
if not self.is_windows:
self.cxx.link_flags += ['-Wl,-rpath,' +
self.cxx_runtime_root]
elif self.is_windows and self.link_shared:
self.add_path(self.exec_env, self.cxx_runtime_root)
elif os.path.isdir(str(self.use_system_cxx_lib)):
self.cxx.link_flags += ['-L' + self.use_system_cxx_lib]
if not self.is_windows:
self.cxx.link_flags += ['-Wl,-rpath,' +
self.use_system_cxx_lib]
if self.is_windows and self.link_shared:
self.add_path(self.cxx.compile_env, self.use_system_cxx_lib)
additional_flags = self.get_lit_conf('test_linker_flags')
if additional_flags:
self.cxx.link_flags += shlex.split(additional_flags)
def configure_link_flags_abi_library_path(self):
# Configure ABI library paths.
self.abi_library_root = self.get_lit_conf('abi_library_path')
if self.abi_library_root:
self.cxx.link_flags += ['-L' + self.abi_library_root]
if not self.is_windows:
self.cxx.link_flags += ['-Wl,-rpath,' + self.abi_library_root]
else:
self.add_path(self.exec_env, self.abi_library_root)
def configure_link_flags_cxx_library(self):
libcxx_experimental = self.get_lit_bool('enable_experimental', default=False)
if libcxx_experimental:
self.config.available_features.add('c++experimental')
self.cxx.link_flags += ['-lc++experimental']
if self.link_shared:
self.cxx.link_flags += ['-lc++']
else:
cxx_library_root = self.get_lit_conf('cxx_library_root')
if cxx_library_root:
libname = self.make_static_lib_name('c++')
abs_path = os.path.join(cxx_library_root, libname)
assert os.path.exists(abs_path) and \
"static libc++ library does not exist"
self.cxx.link_flags += [abs_path]
else:
self.cxx.link_flags += ['-lc++']
def configure_link_flags_abi_library(self):
cxx_abi = self.get_lit_conf('cxx_abi', 'libcxxabi')
if cxx_abi == 'libstdc++':
self.cxx.link_flags += ['-lstdc++']
elif cxx_abi == 'libsupc++':
self.cxx.link_flags += ['-lsupc++']
elif cxx_abi == 'libcxxabi':
if self.target_info.allow_cxxabi_link():
libcxxabi_shared = self.get_lit_bool('libcxxabi_shared', default=True)
if libcxxabi_shared:
self.cxx.link_flags += ['-lc++abi']
else:
cxxabi_library_root = self.get_lit_conf('abi_library_path')
if cxxabi_library_root:
libname = self.make_static_lib_name('c++abi')
abs_path = os.path.join(cxxabi_library_root, libname)
self.cxx.link_flags += [abs_path]
else:
self.cxx.link_flags += ['-lc++abi']
elif cxx_abi == 'libcxxrt':
self.cxx.link_flags += ['-lcxxrt']
elif cxx_abi == 'vcruntime':
debug_suffix = 'd' if self.debug_build else ''
self.cxx.link_flags += ['-l%s%s' % (lib, debug_suffix) for lib in
['vcruntime', 'ucrt', 'msvcrt']]
elif cxx_abi == 'none' or cxx_abi == 'default':
if self.is_windows:
debug_suffix = 'd' if self.debug_build else ''
self.cxx.link_flags += ['-lmsvcrt%s' % debug_suffix]
else:
self.lit_config.fatal(
'C++ ABI setting %s unsupported for tests' % cxx_abi)
def configure_extra_library_flags(self):
if self.get_lit_bool('cxx_ext_threads', default=False):
self.cxx.link_flags += ['-lc++external_threads']
self.target_info.add_cxx_link_flags(self.cxx.link_flags)
def configure_color_diagnostics(self):
use_color = self.get_lit_conf('color_diagnostics')
if use_color is None:
use_color = os.environ.get('LIBCXX_COLOR_DIAGNOSTICS')
if use_color is None:
return
if use_color != '':
self.lit_config.fatal('Invalid value for color_diagnostics "%s".'
% use_color)
color_flag = '-fdiagnostics-color=always'
# Check if the compiler supports the color diagnostics flag. Issue a
# warning if it does not since color diagnostics have been requested.
if not self.cxx.hasCompileFlag(color_flag):
self.lit_config.warning(
'color diagnostics have been requested but are not supported '
'by the compiler')
else:
self.cxx.flags += [color_flag]
def configure_debug_mode(self):
debug_level = self.get_lit_conf('debug_level', None)
if not debug_level:
return
if debug_level not in ['0', '1']:
self.lit_config.fatal('Invalid value for debug_level "%s".'
% debug_level)
self.cxx.compile_flags += ['-D_LIBCPP_DEBUG=%s' % debug_level]
def configure_warnings(self):
# Turn on warnings by default for Clang based compilers when C++ >= 11
default_enable_warnings = self.cxx.type in ['clang', 'apple-clang'] \
and len(self.config.available_features.intersection(
['c++11', 'c++14', 'c++17', 'c++2a'])) != 0
enable_warnings = self.get_lit_bool('enable_warnings',
default_enable_warnings)
self.cxx.useWarnings(enable_warnings)
self.cxx.warning_flags += [
'-D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER',
'-Wall', '-Wextra', '-Werror'
]
if self.cxx.hasWarningFlag('-Wuser-defined-warnings'):
self.cxx.warning_flags += ['-Wuser-defined-warnings']
self.config.available_features.add('diagnose-if-support')
self.cxx.addWarningFlagIfSupported('-Wshadow')
self.cxx.addWarningFlagIfSupported('-Wno-unused-command-line-argument')
self.cxx.addWarningFlagIfSupported('-Wno-attributes')
self.cxx.addWarningFlagIfSupported('-Wno-pessimizing-move')
self.cxx.addWarningFlagIfSupported('-Wno-c++11-extensions')
self.cxx.addWarningFlagIfSupported('-Wno-user-defined-literals')
self.cxx.addWarningFlagIfSupported('-Wno-noexcept-type')
self.cxx.addWarningFlagIfSupported('-Wno-aligned-allocation-unavailable')
# These warnings should be enabled in order to support the MSVC
# team using the test suite; They enable the warnings below and
# expect the test suite to be clean.
self.cxx.addWarningFlagIfSupported('-Wsign-compare')
self.cxx.addWarningFlagIfSupported('-Wunused-variable')
self.cxx.addWarningFlagIfSupported('-Wunused-parameter')
self.cxx.addWarningFlagIfSupported('-Wunreachable-code')
# FIXME: Enable the two warnings below.
self.cxx.addWarningFlagIfSupported('-Wno-conversion')
self.cxx.addWarningFlagIfSupported('-Wno-unused-local-typedef')
# FIXME: Remove this warning once the min/max handling patch lands
# See https://reviews.llvm.org/D33080
self.cxx.addWarningFlagIfSupported('-Wno-#warnings')
std = self.get_lit_conf('std', None)
if std in ['c++98', 'c++03']:
# The '#define static_assert' provided by libc++ in C++03 mode
# causes an unused local typedef whenever it is used.
self.cxx.addWarningFlagIfSupported('-Wno-unused-local-typedef')
def configure_sanitizer(self):
san = self.get_lit_conf('use_sanitizer', '').strip()
if san:
self.target_info.add_sanitizer_features(san, self.config.available_features)
# Search for llvm-symbolizer along the compiler path first
# and then along the PATH env variable.
symbolizer_search_paths = os.environ.get('PATH', '')
cxx_path = libcxx.util.which(self.cxx.path)
if cxx_path is not None:
symbolizer_search_paths = (
os.path.dirname(cxx_path) +
os.pathsep + symbolizer_search_paths)
llvm_symbolizer = libcxx.util.which('llvm-symbolizer',
symbolizer_search_paths)
def add_ubsan():
self.cxx.flags += ['-fsanitize=undefined',
'-fno-sanitize=vptr,function,float-divide-by-zero',
'-fno-sanitize-recover=all']
self.exec_env['UBSAN_OPTIONS'] = 'print_stacktrace=1'
self.config.available_features.add('ubsan')
# Setup the sanitizer compile flags
self.cxx.flags += ['-g', '-fno-omit-frame-pointer']
if san == 'Address' or san == 'Address;Undefined' or san == 'Undefined;Address':
self.cxx.flags += ['-fsanitize=address']
if llvm_symbolizer is not None:
self.exec_env['ASAN_SYMBOLIZER_PATH'] = llvm_symbolizer
# FIXME: Turn ODR violation back on after PR28391 is resolved
# https://bugs.llvm.org/show_bug.cgi?id=28391
self.exec_env['ASAN_OPTIONS'] = 'detect_odr_violation=0'
self.config.available_features.add('asan')
self.config.available_features.add('sanitizer-new-delete')
self.cxx.compile_flags += ['-O1']
if san == 'Address;Undefined' or san == 'Undefined;Address':
add_ubsan()
elif san == 'Memory' or san == 'MemoryWithOrigins':
self.cxx.flags += ['-fsanitize=memory']
if san == 'MemoryWithOrigins':
self.cxx.compile_flags += [
'-fsanitize-memory-track-origins']
if llvm_symbolizer is not None:
self.exec_env['MSAN_SYMBOLIZER_PATH'] = llvm_symbolizer
self.config.available_features.add('msan')
self.config.available_features.add('sanitizer-new-delete')
self.cxx.compile_flags += ['-O1']
elif san == 'Undefined':
add_ubsan()
self.cxx.compile_flags += ['-O2']
elif san == 'Thread':
self.cxx.flags += ['-fsanitize=thread']
self.config.available_features.add('tsan')
self.config.available_features.add('sanitizer-new-delete')
else:
self.lit_config.fatal('unsupported value for '
'use_sanitizer: {0}'.format(san))
san_lib = self.get_lit_conf('sanitizer_library')
if san_lib:
self.cxx.link_flags += [
san_lib, '-Wl,-rpath,%s' % os.path.dirname(san_lib)]