395 lines
15 KiB
Makefile
395 lines
15 KiB
Makefile
##############################################
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## Perform configuration steps for sanitizers.
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##############################################
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my_sanitize := $(strip $(LOCAL_SANITIZE))
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my_sanitize_diag := $(strip $(LOCAL_SANITIZE_DIAG))
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# SANITIZE_HOST is only in effect if the module is already using clang (host
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# modules that haven't set `LOCAL_CLANG := false` and device modules that
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# have set `LOCAL_CLANG := true`.
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my_global_sanitize :=
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my_global_sanitize_diag :=
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ifeq ($(my_clang),true)
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ifdef LOCAL_IS_HOST_MODULE
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ifneq ($($(my_prefix)OS),windows)
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my_global_sanitize := $(strip $(SANITIZE_HOST))
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# SANITIZE_HOST=true is a deprecated way to say SANITIZE_HOST=address.
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my_global_sanitize := $(subst true,address,$(my_global_sanitize))
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endif
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else
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my_global_sanitize := $(strip $(SANITIZE_TARGET))
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my_global_sanitize_diag := $(strip $(SANITIZE_TARGET_DIAG))
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endif
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endif
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# Disable global integer_overflow in excluded paths.
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ifneq ($(filter integer_overflow, $(my_global_sanitize)),)
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combined_exclude_paths := $(INTEGER_OVERFLOW_EXCLUDE_PATHS) \
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$(PRODUCT_INTEGER_OVERFLOW_EXCLUDE_PATHS)
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ifneq ($(strip $(foreach dir,$(subst $(comma),$(space),$(combined_exclude_paths)),\
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$(filter $(dir)%,$(LOCAL_PATH)))),)
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my_global_sanitize := $(filter-out integer_overflow,$(my_global_sanitize))
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my_global_sanitize_diag := $(filter-out integer_overflow,$(my_global_sanitize_diag))
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endif
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endif
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# Global integer sanitization doesn't support static modules.
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ifeq ($(filter SHARED_LIBRARIES EXECUTABLES,$(LOCAL_MODULE_CLASS)),)
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my_global_sanitize := $(filter-out integer_overflow,$(my_global_sanitize))
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my_global_sanitize_diag := $(filter-out integer_overflow,$(my_global_sanitize_diag))
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endif
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ifeq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
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my_global_sanitize := $(filter-out integer_overflow,$(my_global_sanitize))
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my_global_sanitize_diag := $(filter-out integer_overflow,$(my_global_sanitize_diag))
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endif
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# Disable global CFI in excluded paths
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ifneq ($(filter cfi, $(my_global_sanitize)),)
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combined_exclude_paths := $(CFI_EXCLUDE_PATHS) \
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$(PRODUCT_CFI_EXCLUDE_PATHS)
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ifneq ($(strip $(foreach dir,$(subst $(comma),$(space),$(combined_exclude_paths)),\
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$(filter $(dir)%,$(LOCAL_PATH)))),)
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my_global_sanitize := $(filter-out cfi,$(my_global_sanitize))
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my_global_sanitize_diag := $(filter-out cfi,$(my_global_sanitize_diag))
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endif
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endif
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ifneq ($(my_global_sanitize),)
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my_sanitize := $(my_global_sanitize) $(my_sanitize)
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endif
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ifneq ($(my_global_sanitize_diag),)
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my_sanitize_diag := $(my_global_sanitize_diag) $(my_sanitize_diag)
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endif
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# The sanitizer specified in the product configuration wins over the previous.
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ifneq ($(SANITIZER.$(TARGET_PRODUCT).$(LOCAL_MODULE).CONFIG),)
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my_sanitize := $(SANITIZER.$(TARGET_PRODUCT).$(LOCAL_MODULE).CONFIG)
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ifeq ($(my_sanitize),never)
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my_sanitize :=
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my_sanitize_diag :=
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endif
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endif
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ifndef LOCAL_IS_HOST_MODULE
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# Add a filter point for 32-bit vs 64-bit sanitization (to lighten the burden)
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SANITIZE_TARGET_ARCH ?= $(TARGET_ARCH) $(TARGET_2ND_ARCH)
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ifeq ($(filter $(SANITIZE_TARGET_ARCH),$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)),)
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my_sanitize :=
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my_sanitize_diag :=
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endif
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endif
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# Add a filter point based on module owner (to lighten the burden). The format is a space- or
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# colon-separated list of owner names.
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ifneq (,$(SANITIZE_NEVER_BY_OWNER))
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ifneq (,$(LOCAL_MODULE_OWNER))
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ifneq (,$(filter $(LOCAL_MODULE_OWNER),$(subst :, ,$(SANITIZE_NEVER_BY_OWNER))))
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$(warning Not sanitizing $(LOCAL_MODULE) based on module owner.)
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my_sanitize :=
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my_sanitize_diag :=
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endif
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endif
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endif
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# Don't apply sanitizers to NDK code.
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ifdef LOCAL_SDK_VERSION
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my_sanitize :=
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my_global_sanitize :=
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my_sanitize_diag :=
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endif
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# Never always wins.
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ifeq ($(LOCAL_SANITIZE),never)
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my_sanitize :=
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my_sanitize_diag :=
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endif
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# Enable CFI in included paths (for Arm64 only).
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ifeq ($(filter cfi, $(my_sanitize)),)
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ifneq ($(filter arm64,$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)),)
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combined_include_paths := $(CFI_INCLUDE_PATHS) \
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$(PRODUCT_CFI_INCLUDE_PATHS)
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ifneq ($(strip $(foreach dir,$(subst $(comma),$(space),$(combined_include_paths)),\
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$(filter $(dir)%,$(LOCAL_PATH)))),)
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my_sanitize := cfi $(my_sanitize)
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my_sanitize_diag := cfi $(my_sanitize_diag)
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endif
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endif
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endif
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# If CFI is disabled globally, remove it from my_sanitize.
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ifeq ($(strip $(ENABLE_CFI)),false)
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my_sanitize := $(filter-out cfi,$(my_sanitize))
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my_sanitize_diag := $(filter-out cfi,$(my_sanitize_diag))
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endif
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# Disable CFI for arm32 (b/35157333).
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ifneq ($(filter arm,$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)),)
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my_sanitize := $(filter-out cfi,$(my_sanitize))
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my_sanitize_diag := $(filter-out cfi,$(my_sanitize_diag))
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endif
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# Also disable CFI if ASAN is enabled.
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ifneq ($(filter address,$(my_sanitize)),)
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my_sanitize := $(filter-out cfi,$(my_sanitize))
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my_sanitize_diag := $(filter-out cfi,$(my_sanitize_diag))
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endif
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# CFI needs gold linker, and mips toolchain does not have one.
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ifneq ($(filter mips mips64,$(TARGET_$(LOCAL_2ND_ARCH_VAR_PREFIX)ARCH)),)
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my_sanitize := $(filter-out cfi,$(my_sanitize))
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my_sanitize_diag := $(filter-out cfi,$(my_sanitize_diag))
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endif
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# Disable sanitizers which need the UBSan runtime for host targets.
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ifdef LOCAL_IS_HOST_MODULE
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my_sanitize := $(filter-out cfi,$(my_sanitize))
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my_sanitize_diag := $(filter-out cfi,$(my_sanitize_diag))
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my_sanitize := $(filter-out signed-integer-overflow unsigned-integer-overflow integer_overflow,$(my_sanitize))
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my_sanitize_diag := $(filter-out signed-integer-overflow unsigned-integer-overflow integer_overflow,$(my_sanitize_diag))
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endif
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# Support for local sanitize blacklist paths.
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ifneq ($(my_sanitize)$(my_global_sanitize),)
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ifneq ($(LOCAL_SANITIZE_BLACKLIST),)
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my_cflags += -fsanitize-blacklist=$(LOCAL_PATH)/$(LOCAL_SANITIZE_BLACKLIST)
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endif
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endif
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# Disable integer_overflow if LOCAL_NOSANITIZE=integer.
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ifneq ($(filter integer_overflow, $(my_global_sanitize) $(my_sanitize)),)
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ifneq ($(filter integer, $(strip $(LOCAL_NOSANITIZE))),)
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my_sanitize := $(filter-out integer_overflow,$(my_sanitize))
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my_sanitize_diag := $(filter-out integer_overflow,$(my_sanitize_diag))
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endif
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endif
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my_nosanitize = $(strip $(LOCAL_NOSANITIZE))
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ifneq ($(my_nosanitize),)
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my_sanitize := $(filter-out $(my_nosanitize),$(my_sanitize))
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endif
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# TSAN is not supported on 32-bit architectures. For non-multilib cases, make
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# its use an error. For multilib cases, don't use it for the 32-bit case.
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ifneq ($(filter thread,$(my_sanitize)),)
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ifeq ($(my_32_64_bit_suffix),32)
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ifeq ($(my_module_multilib),both)
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my_sanitize := $(filter-out thread,$(my_sanitize))
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else
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$(error $(LOCAL_PATH): $(LOCAL_MODULE): TSAN cannot be used for 32-bit modules.)
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endif
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else
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my_shared_libraries += $(TSAN_RUNTIME_LIBRARY)
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endif
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endif
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ifneq ($(filter safe-stack,$(my_sanitize)),)
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ifeq ($(my_32_64_bit_suffix),32)
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my_sanitize := $(filter-out safe-stack,$(my_sanitize))
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endif
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endif
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# Disable Scudo if ASan or TSan is enabled.
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ifneq ($(filter address thread,$(my_sanitize)),)
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my_sanitize := $(filter-out scudo,$(my_sanitize))
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endif
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ifneq ($(filter scudo,$(my_sanitize)),)
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my_shared_libraries += $($(LOCAL_2ND_ARCH_VAR_PREFIX)SCUDO_RUNTIME_LIBRARY)
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endif
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# Undefined symbols can occur if a non-sanitized library links
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# sanitized static libraries. That's OK, because the executable
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# always depends on the ASan runtime library, which defines these
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# symbols.
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ifneq ($(filter address thread,$(strip $(SANITIZE_TARGET))),)
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ifndef LOCAL_IS_HOST_MODULE
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ifeq ($(LOCAL_MODULE_CLASS),SHARED_LIBRARIES)
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ifeq ($(my_sanitize),)
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my_allow_undefined_symbols := true
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endif
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endif
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endif
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endif
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# Sanitizers can only be used with clang.
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ifneq ($(my_clang),true)
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ifneq ($(my_sanitize),)
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$(error $(LOCAL_PATH): $(LOCAL_MODULE): Use of sanitizers requires LOCAL_CLANG := true)
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endif
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endif
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ifneq ($(filter default-ub,$(my_sanitize)),)
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my_sanitize := $(CLANG_DEFAULT_UB_CHECKS)
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endif
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ifneq ($(filter coverage,$(my_sanitize)),)
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ifeq ($(filter address,$(my_sanitize)),)
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$(error $(LOCAL_PATH): $(LOCAL_MODULE): Use of 'coverage' also requires 'address')
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endif
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my_cflags += -fsanitize-coverage=trace-pc-guard,indirect-calls,trace-cmp
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my_sanitize := $(filter-out coverage,$(my_sanitize))
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endif
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ifneq ($(filter integer_overflow,$(my_sanitize)),)
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# Respect LOCAL_NOSANITIZE for integer-overflow flags.
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ifeq ($(filter signed-integer-overflow, $(strip $(LOCAL_NOSANITIZE))),)
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my_sanitize += signed-integer-overflow
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endif
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ifeq ($(filter unsigned-integer-overflow, $(strip $(LOCAL_NOSANITIZE))),)
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my_sanitize += unsigned-integer-overflow
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endif
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my_cflags += $(INTEGER_OVERFLOW_EXTRA_CFLAGS)
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# Check for diagnostics mode.
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ifneq ($(filter integer_overflow,$(my_sanitize_diag)),)
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ifneq ($(filter SHARED_LIBRARIES EXECUTABLES,$(LOCAL_MODULE_CLASS)),)
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ifneq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
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my_sanitize_diag += signed-integer-overflow
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my_sanitize_diag += unsigned-integer-overflow
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else
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$(call pretty-error,Make cannot apply integer overflow diagnostics to static binary.)
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endif
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else
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$(call pretty-error,Make cannot apply integer overflow diagnostics to static library.)
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endif
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endif
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my_sanitize := $(filter-out integer_overflow,$(my_sanitize))
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endif
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# Makes sure integer_overflow diagnostics is removed from the diagnostics list
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# even if integer_overflow is not set for some reason.
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ifneq ($(filter integer_overflow,$(my_sanitize_diag)),)
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my_sanitize_diag := $(filter-out integer_overflow,$(my_sanitize_diag))
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endif
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ifneq ($(my_sanitize),)
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fsanitize_arg := $(subst $(space),$(comma),$(my_sanitize))
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my_cflags += -fsanitize=$(fsanitize_arg)
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ifdef LOCAL_IS_HOST_MODULE
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my_cflags += -fno-sanitize-recover=all
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my_ldflags += -fsanitize=$(fsanitize_arg)
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else
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my_cflags += -fsanitize-trap=all
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my_cflags += -ftrap-function=abort
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ifneq ($(filter address thread,$(my_sanitize)),)
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my_cflags += -fno-sanitize-trap=address,thread
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my_shared_libraries += libdl
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endif
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endif
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endif
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ifneq ($(filter cfi,$(my_sanitize)),)
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# __cfi_check needs to be built as Thumb (see the code in linker_cfi.cpp).
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# LLVM is not set up to do this on a function basis, so force Thumb on the
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# entire module.
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LOCAL_ARM_MODE := thumb
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my_cflags += $(CFI_EXTRA_CFLAGS)
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# Only append the default visibility flag if -fvisibility has not already been
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# set to hidden.
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ifeq ($(filter -fvisibility=hidden,$(LOCAL_CFLAGS)),)
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my_cflags += -fvisibility=default
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endif
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my_ldflags += $(CFI_EXTRA_LDFLAGS)
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my_arflags += --plugin $(LLVM_PREBUILTS_PATH)/../lib64/LLVMgold.so
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ifeq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
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my_ldflags := $(filter-out -fsanitize-cfi-cross-dso,$(my_ldflags))
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my_cflags := $(filter-out -fsanitize-cfi-cross-dso,$(my_cflags))
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else
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# Apply the version script to non-static executables
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my_ldflags += -Wl,--version-script,build/soong/cc/config/cfi_exports.map
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LOCAL_ADDITIONAL_DEPENDENCIES += build/soong/cc/config/cfi_exports.map
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endif
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endif
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# If local or global modules need ASAN, add linker flags.
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ifneq ($(filter address,$(my_global_sanitize) $(my_sanitize)),)
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my_ldflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS)
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ifdef LOCAL_IS_HOST_MODULE
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# -nodefaultlibs (provided with libc++) prevents the driver from linking
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# libraries needed with -fsanitize=address. http://b/18650275 (WAI)
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my_ldflags += -Wl,--no-as-needed
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else
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# Add asan libraries unless LOCAL_MODULE is the asan library.
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# ASan runtime library must be the first in the link order.
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ifeq (,$(filter $(LOCAL_MODULE),$($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_RUNTIME_LIBRARY)))
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my_shared_libraries := $($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_RUNTIME_LIBRARY) \
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$(my_shared_libraries)
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endif
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ifeq (,$(filter $(LOCAL_MODULE),$(ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES)))
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my_static_libraries += $(ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES)
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endif
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# Do not add unnecessary dependency in shared libraries.
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ifeq ($(LOCAL_MODULE_CLASS),SHARED_LIBRARIES)
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my_ldflags += -Wl,--as-needed
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endif
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ifeq ($(LOCAL_MODULE_CLASS),EXECUTABLES)
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ifneq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
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my_linker := $($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_LINKER)
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# Make sure linker_asan get installed.
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$(LOCAL_INSTALLED_MODULE) : | $(PRODUCT_OUT)$($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_LINKER)
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endif
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endif
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endif
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endif
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# If local module needs ASAN, add compiler flags.
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ifneq ($(filter address,$(my_sanitize)),)
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# Frame pointer based unwinder in ASan requires ARM frame setup.
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LOCAL_ARM_MODE := arm
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my_cflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS)
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ifndef LOCAL_IS_HOST_MODULE
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my_cflags += -mllvm -asan-globals=0
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endif
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endif
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# Use minimal diagnostics when integer overflow is enabled; never do it for HOST or AUX modules
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ifeq ($(LOCAL_IS_HOST_MODULE)$(LOCAL_IS_AUX_MODULE),)
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# Pre-emptively add UBSAN minimal runtime incase a static library dependency requires it
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ifeq ($(filter STATIC_LIBRARIES,$(LOCAL_MODULE_CLASS)),)
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ifndef LOCAL_SDK_VERSION
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my_static_libraries += $($(LOCAL_2ND_ARCH_VAR_PREFIX)UBSAN_MINIMAL_RUNTIME_LIBRARY)
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my_ldflags += -Wl,--exclude-libs,$($(LOCAL_2ND_ARCH_VAR_PREFIX)UBSAN_MINIMAL_RUNTIME_LIBRARY).a
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endif
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endif
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ifneq ($(filter unsigned-integer-overflow signed-integer-overflow integer,$(my_sanitize)),)
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ifeq ($(filter unsigned-integer-overflow signed-integer overflow integer,$(my_sanitize_diag)),)
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ifeq ($(filter cfi,$(my_sanitize_diag)),)
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ifeq ($(filter address,$(my_sanitize)),)
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my_cflags += -fsanitize-minimal-runtime
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my_cflags += -fno-sanitize-trap=integer
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my_cflags += -fno-sanitize-recover=integer
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endif
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endif
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endif
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endif
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endif
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ifneq ($(strip $(LOCAL_SANITIZE_RECOVER)),)
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recover_arg := $(subst $(space),$(comma),$(LOCAL_SANITIZE_RECOVER)),
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my_cflags += -fsanitize-recover=$(recover_arg)
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endif
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ifneq ($(my_sanitize_diag),)
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# TODO(vishwath): Add diagnostic support for static executables once
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# we switch to clang-4393122 (which adds the static ubsan runtime
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# that this depends on)
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ifneq ($(LOCAL_FORCE_STATIC_EXECUTABLE),true)
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notrap_arg := $(subst $(space),$(comma),$(my_sanitize_diag)),
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my_cflags += -fno-sanitize-trap=$(notrap_arg)
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# Diagnostic requires a runtime library, unless ASan or TSan are also enabled.
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ifeq ($(filter address thread scudo,$(my_sanitize)),)
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# Does not have to be the first DT_NEEDED unlike ASan.
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my_shared_libraries += $($(LOCAL_2ND_ARCH_VAR_PREFIX)UBSAN_RUNTIME_LIBRARY)
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endif
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endif
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endif
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