forked from OSchip/llvm-project
66 lines
3.5 KiB
Python
66 lines
3.5 KiB
Python
# -*- Python -*-
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import os
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# Setup config name.
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config.name = 'HWAddressSanitizer' + getattr(config, 'name_suffix', 'default')
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# Setup source root.
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config.test_source_root = os.path.dirname(__file__)
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# Setup default compiler flags used with -fsanitize=memory option.
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clang_cflags = [config.target_cflags] + config.debug_info_flags
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clang_cxxflags = config.cxx_mode_flags + clang_cflags
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clang_hwasan_common_cflags = clang_cflags + ["-fsanitize=hwaddress", "-fuse-ld=lld"]
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if config.target_arch == 'x86_64' and config.enable_aliases == '1':
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clang_hwasan_common_cflags += ["-fsanitize-hwaddress-experimental-aliasing"]
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else:
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config.available_features.add('pointer-tagging')
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if config.target_arch == 'x86_64':
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# By default the assembler uses R_X86_64_REX_GOTPCRELX relocations, which can
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# be relaxed to direct references. When tagged globals are enabled, these
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# references fail to link since they have more than a 32-bit offset from RIP.
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# As a workaround, we disable the relaxation.
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# TODO: Implement a way to disable for the affected relocations only.
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clang_hwasan_common_cflags += ["-Wa,-mrelax-relocations=no"]
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# The callback instrumentation used on x86_64 has a 1/64 chance of choosing a
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# stack tag of 0. This causes stack tests to become flaky, so we force tags
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# to be generated via calls to __hwasan_generate_tag, which never returns 0.
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# TODO: See if we can remove this once we use the outlined instrumentation.
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clang_hwasan_common_cflags += ["-mllvm", "-hwasan-generate-tags-with-calls=1"]
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clang_hwasan_cflags = clang_hwasan_common_cflags + ["-mllvm", "-hwasan-globals",
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"-mllvm", "-hwasan-use-short-granules",
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"-mllvm", "-hwasan-instrument-landing-pads=0",
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"-mllvm", "-hwasan-instrument-personality-functions"]
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clang_hwasan_oldrt_cflags = clang_hwasan_common_cflags + ["-mllvm", "-hwasan-use-short-granules=0",
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"-mllvm", "-hwasan-instrument-landing-pads=1",
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"-mllvm", "-hwasan-instrument-personality-functions=0"]
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clang_hwasan_cxxflags = config.cxx_mode_flags + clang_hwasan_cflags
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clang_hwasan_oldrt_cxxflags = config.cxx_mode_flags + clang_hwasan_oldrt_cflags
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def build_invocation(compile_flags):
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return " " + " ".join([config.clang] + compile_flags) + " "
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config.substitutions.append( ("%clangxx ", build_invocation(clang_cxxflags)) )
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config.substitutions.append( ("%clang_hwasan ", build_invocation(clang_hwasan_cflags)) )
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config.substitutions.append( ("%clang_hwasan_oldrt ", build_invocation(clang_hwasan_oldrt_cflags)) )
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config.substitutions.append( ("%clangxx_hwasan ", build_invocation(clang_hwasan_cxxflags)) )
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config.substitutions.append( ("%clangxx_hwasan_oldrt ", build_invocation(clang_hwasan_oldrt_cxxflags)) )
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config.substitutions.append( ("%compiler_rt_libdir", config.compiler_rt_libdir) )
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default_hwasan_opts_str = ':'.join(['disable_allocator_tagging=1', 'random_tags=0', 'fail_without_syscall_abi=0'] + config.default_sanitizer_opts)
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if default_hwasan_opts_str:
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config.environment['HWASAN_OPTIONS'] = default_hwasan_opts_str
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default_hwasan_opts_str += ':'
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config.substitutions.append(('%env_hwasan_opts=',
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'env HWASAN_OPTIONS=' + default_hwasan_opts_str))
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# Default test suffixes.
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config.suffixes = ['.c', '.cpp']
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if config.host_os not in ['Linux', 'Android'] or not config.has_lld:
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config.unsupported = True
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