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import lit.formats
import sys
import os
config.name = "libFuzzer" + config.name_suffix
config.test_format = lit.formats.ShTest(True)
config.suffixes = ['.test']
config.test_source_root = os.path.dirname(__file__)
config.available_features.add(config.target_arch)
lit_config.note(f'arch feature "{config.target_arch}" available')
# 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 an override.
use_lit_shell = os.environ.get("LIT_USE_INTERNAL_SHELL")
if use_lit_shell:
# 0 is external, "" is default, and everything else is internal.
execute_external = (use_lit_shell == "0")
else:
# Otherwise we default to internal on Windows and external elsewhere, as
# bash on Windows is usually very slow.
execute_external = (not sys.platform in ['win32'])
# testFormat: The test format to use to interpret tests.
#
# For now we require '&&' between commands, until they get globally killed and
# the test runner updated.
config.test_format = lit.formats.ShTest(execute_external)
# LeakSanitizer is not supported on OSX or Windows right now.
if (sys.platform.startswith('darwin') or
sys.platform.startswith('freebsd') or
sys.platform.startswith('win')):
lit_config.note('lsan feature unavailable')
else:
lit_config.note('lsan feature available')
config.available_features.add('lsan')
# MemorySanitizer is not supported on OSX or Windows right now
if (sys.platform.startswith('darwin') or sys.platform.startswith('win') or
config.target_arch == 'i386'):
lit_config.note('msan feature unavailable')
assert 'msan' not in config.available_features
else:
lit_config.note('msan feature available')
config.available_features.add('msan')
if sys.platform.startswith('win') or sys.platform.startswith('cygwin'):
config.available_features.add('windows')
if sys.platform.startswith('darwin'):
config.available_features.add('darwin')
if sys.platform.startswith('linux'):
# Note the value of ``sys.platform`` is not consistent
# between python 2 and 3, hence the use of ``.startswith()``.
lit_config.note('linux feature available')
config.available_features.add('linux')
else:
lit_config.note('linux feature unavailable')
if config.arm_thumb:
config.available_features.add('thumb')
config.substitutions.append(('%build_dir', config.cmake_binary_dir))
libfuzzer_src_root = os.path.join(config.compiler_rt_src_root, "lib", "fuzzer")
config.substitutions.append(('%libfuzzer_src', libfuzzer_src_root))
config.substitutions.append(('%python', '"%s"' % (sys.executable)))
def generate_compiler_cmd(is_cpp=True, fuzzer_enabled=True, msan_enabled=False):
compiler_cmd = config.clang
extra_cmd = config.target_flags
if is_cpp:
std_cmd = '--driver-mode=g++'
else:
std_cmd = ''
if msan_enabled:
sanitizers = ['memory']
else:
sanitizers = ['address']
if fuzzer_enabled:
sanitizers.append('fuzzer')
sanitizers_cmd = ('-fsanitize=%s' % ','.join(sanitizers))
return " ".join([
compiler_cmd,
std_cmd,
"-O2 -gline-tables-only",
sanitizers_cmd,
"-I%s" % libfuzzer_src_root,
extra_cmd
])
config.substitutions.append(('%cpp_compiler',
generate_compiler_cmd(is_cpp=True, fuzzer_enabled=True)
))
config.substitutions.append(('%c_compiler',
generate_compiler_cmd(is_cpp=False, fuzzer_enabled=True)
))
config.substitutions.append(('%no_fuzzer_cpp_compiler',
generate_compiler_cmd(is_cpp=True, fuzzer_enabled=False)
))
config.substitutions.append(('%no_fuzzer_c_compiler',
generate_compiler_cmd(is_cpp=False, fuzzer_enabled=False)
))
config.substitutions.append(('%msan_compiler',
generate_compiler_cmd(is_cpp=True, fuzzer_enabled=True, msan_enabled=True)
))
default_asan_opts_str = ':'.join(config.default_sanitizer_opts)
if default_asan_opts_str:
config.environment['ASAN_OPTIONS'] = default_asan_opts_str
default_asan_opts_str += ':'
config.substitutions.append(('%env_asan_opts=',
'env ASAN_OPTIONS=' + default_asan_opts_str))
if not config.parallelism_group:
config.parallelism_group = 'shadow-memory'
if config.host_os == 'NetBSD':
config.substitutions.insert(0, ('%run', config.netbsd_noaslr_prefix))
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