# -*- Python -*-

import os


def get_required_attr(config, attr_name):
    attr_value = getattr(config, attr_name, None)
    if attr_value is None:
        lit_config.fatal(
            "No attribute %r in test configuration! You may need to run "
            "tests from your build directory or add this attribute "
            "to lit.site.cfg.py " % attr_name
        )
    return attr_value


# Setup source root.
config.test_source_root = os.path.dirname(__file__)
config.name = "UBSan-Minimal" + config.name_suffix


def build_invocation(compile_flags):
    return " " + " ".join([config.clang] + compile_flags) + " "


target_cflags = [get_required_attr(config, "target_cflags")]
clang_ubsan_cflags = ["-fsanitize-minimal-runtime"] + target_cflags
clang_ubsan_cxxflags = config.cxx_mode_flags + clang_ubsan_cflags

# Define %clang and %clangxx substitutions to use in test RUN lines.
config.substitutions.append(("%clang ", build_invocation(clang_ubsan_cflags)))
config.substitutions.append(("%clangxx ", build_invocation(clang_ubsan_cxxflags)))

# Default test suffixes.
config.suffixes = [".c", ".cpp"]

# Check that the host supports UndefinedBehaviorSanitizerMinimal tests
if config.host_os not in [
    "Linux",
    "FreeBSD",
    "NetBSD",
    "Darwin",
    "OpenBSD",
    "SunOS",
]:  # TODO: Windows
    config.unsupported = True

if config.test_cfi:
    config.available_features.add("cfi")

# Don't target x86_64h if the test machine can't execute x86_64h binaries.
if "-arch x86_64h" in target_cflags and "x86_64h" not in config.available_features:
    config.unsupported = True
