91 lines · python
1# -*- Python -*-2 3import os4 5from lit.llvm import llvm_config6from lit.llvm.subst import ToolSubst, FindTool7 8# Setup config name.9config.name = "HWAddressSanitizer" + getattr(config, "name_suffix", "default")10 11# Setup source root.12config.test_source_root = os.path.dirname(__file__)13 14# Setup default compiler flags used with -fsanitize=memory option.15clang_cflags = [config.target_cflags] + config.debug_info_flags16clang_cxxflags = config.cxx_mode_flags + clang_cflags17clang_hwasan_common_cflags = clang_cflags + ["-fsanitize=hwaddress", "-fuse-ld=lld"]18 19if config.target_arch == "x86_64" and config.enable_aliases != "0":20 clang_hwasan_common_cflags += ["-fsanitize-hwaddress-experimental-aliasing"]21else:22 config.available_features.add("pointer-tagging")23if config.target_arch == "x86_64":24 # The callback instrumentation used on x86_64 has a 1/64 chance of choosing a25 # stack tag of 0. This causes stack tests to become flaky, so we force tags26 # to be generated via calls to __hwasan_generate_tag, which never returns 0.27 # TODO: See if we can remove this once we use the outlined instrumentation.28 clang_hwasan_common_cflags += ["-mllvm", "-hwasan-generate-tags-with-calls=1"]29clang_hwasan_cflags = clang_hwasan_common_cflags + [30 "-mllvm",31 "-hwasan-globals",32 "-mllvm",33 "-hwasan-use-short-granules",34 "-mllvm",35 "-hwasan-instrument-landing-pads=0",36 "-mllvm",37 "-hwasan-instrument-personality-functions",38]39clang_hwasan_oldrt_cflags = clang_hwasan_common_cflags + [40 "-mllvm",41 "-hwasan-use-short-granules=0",42 "-mllvm",43 "-hwasan-instrument-landing-pads=1",44 "-mllvm",45 "-hwasan-instrument-personality-functions=0",46]47 48clang_hwasan_cxxflags = config.cxx_mode_flags + clang_hwasan_cflags49clang_hwasan_oldrt_cxxflags = config.cxx_mode_flags + clang_hwasan_oldrt_cflags50 51 52def build_invocation(compile_flags):53 return " " + " ".join([config.clang] + compile_flags) + " "54 55 56config.substitutions.append(("%clangxx ", build_invocation(clang_cxxflags)))57config.substitutions.append(("%clang_hwasan ", build_invocation(clang_hwasan_cflags)))58config.substitutions.append(59 ("%clang_hwasan_oldrt ", build_invocation(clang_hwasan_oldrt_cflags))60)61config.substitutions.append(62 ("%clangxx_hwasan ", build_invocation(clang_hwasan_cxxflags))63)64config.substitutions.append(65 ("%clangxx_hwasan_oldrt ", build_invocation(clang_hwasan_oldrt_cxxflags))66)67config.substitutions.append(("%compiler_rt_libdir", config.compiler_rt_libdir))68 69default_hwasan_opts_str = ":".join(70 ["disable_allocator_tagging=1", "random_tags=0", "fail_without_syscall_abi=0"]71 + config.default_sanitizer_opts72)73if default_hwasan_opts_str:74 config.environment["HWASAN_OPTIONS"] = default_hwasan_opts_str75 default_hwasan_opts_str += ":"76config.substitutions.append(77 ("%env_hwasan_opts=", "env HWASAN_OPTIONS=" + default_hwasan_opts_str)78)79 80# Ensure that we can use hwasan_symbolize from the expected location81llvm_config.add_tool_substitutions(82 [ToolSubst("hwasan_symbolize", unresolved="fatal")],83 search_dirs=[config.compiler_rt_bindir],84)85 86# Default test suffixes.87config.suffixes = [".c", ".cpp"]88 89if config.target_os not in ["Linux", "Android"] or not config.has_lld:90 config.unsupported = True91