platform_build/core/config_sanitizers.mk

##############################################
## Perform configuration steps for sanitizers.
##############################################

# Configure SANITIZE_HOST.
ifdef LOCAL_IS_HOST_MODULE
  my_sanitize_host := $(strip $(SANITIZE_HOST))
endif

# SANTIZIZE_HOST=true is a deprecated way to say SANITIZE_HOST=address.
ifeq ($(my_sanitize_host),true)
  my_sanitize_host := address
endif

# SANITIZE_HOST is only in effect if the module is already using clang (host
# modules that haven't set `LOCAL_CLANG := false` and device modules that have
# set `LOCAL_CLANG := true`.
ifneq ($(my_clang),true)
  my_sanitize_host :=
endif

my_sanitize := $(strip $(LOCAL_SANITIZE))

# Keep compatibility for LOCAL_ADDRESS_SANITIZER until all targets have moved to
# `LOCAL_SANITIZE := address`.
ifeq ($(strip $(LOCAL_ADDRESS_SANITIZER)),true)
  my_sanitize += address
endif

# And `LOCAL_SANITIZE := never`.
ifeq ($(strip $(LOCAL_ADDRESS_SANITIZER)),false)
  my_sanitize := never
endif

# Don't apply sanitizers to NDK code.
ifdef LOCAL_SDK_VERSION
  my_sanitize := never
endif

ifeq ($(my_sanitize),)
  my_sanitize := $(my_sanitize_host)
endif

ifeq ($(my_sanitize),never)
  my_sanitize :=
endif

# Sanitizers can only be used with clang.
ifneq ($(my_clang),true)
  ifneq ($(my_sanitize),)
    $(error $(LOCAL_PATH): $(LOCAL_MODULE): Use of sanitizers requires LOCAL_CLANG := true)
  endif
endif

unknown_sanitizers := $(filter-out address, \
                      $(filter-out undefined,$(my_sanitize)))

ifneq ($(unknown_sanitizers),)
  $(error Unknown sanitizers: $(unknown_sanitizers))
endif

ifneq ($(my_sanitize),)
  fsanitize_arg := $(subst $(space),$(comma),$(my_sanitize)),
  my_cflags += -fsanitize=$(fsanitize_arg)

  ifdef LOCAL_IS_HOST_MODULE
    my_ldflags += -fsanitize=$(fsanitize_arg)
  endif
endif

ifneq ($(filter address,$(my_sanitize)),)
  # Frame pointer based unwinder in ASan requires ARM frame setup.
  LOCAL_ARM_MODE := arm
  my_cflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS)
  my_ldflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS)
  ifdef LOCAL_IS_HOST_MODULE
    # -nodefaultlibs (provided with libc++) prevents the driver from linking
    # libraries needed with -fsanitize=address. http://b/18650275 (WAI)
    my_ldlibs += -ldl -lpthread
  else
    my_shared_libraries += $(ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES)
    my_static_libraries += $(ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES)
  endif
endif

ifneq ($(filter undefined,$(my_sanitize)),)
  ifdef LOCAL_IS_HOST_MODULE
    my_ldlibs += -ldl
  else
    $(error ubsan is not yet supported on the target)
  endif
endif