1##############################################
2## Perform configuration steps for sanitizers.
3##############################################
4
5my_sanitize := $(strip $(LOCAL_SANITIZE))
6
7# Keep compatibility for LOCAL_ADDRESS_SANITIZER until all targets have moved to
8# `LOCAL_SANITIZE := address`.
9ifeq ($(strip $(LOCAL_ADDRESS_SANITIZER)),true)
10  my_sanitize += address
11endif
12
13# And `LOCAL_SANITIZE := never`.
14ifeq ($(strip $(LOCAL_ADDRESS_SANITIZER)),false)
15  my_sanitize := never
16endif
17
18# Don't apply sanitizers to NDK code.
19ifdef LOCAL_SDK_VERSION
20  my_sanitize := never
21endif
22
23# Configure SANITIZE_HOST.
24ifdef LOCAL_IS_HOST_MODULE
25  ifeq ($(my_sanitize),)
26    my_sanitize := $(strip $(SANITIZE_HOST))
27
28    # SANTIZIZE_HOST=true is a deprecated way to say SANITIZE_HOST=address.
29    ifeq ($(my_sanitize),true)
30      my_sanitize := address
31    endif
32
33    # SANITIZE_HOST is only in effect if the module is already using clang (host
34    # modules that haven't set `LOCAL_CLANG := false` and device modules that
35    # have set `LOCAL_CLANG := true`.
36    ifneq ($(my_clang),true)
37      my_sanitize :=
38    endif
39  endif
40endif
41
42ifeq ($(my_sanitize),never)
43  my_sanitize :=
44endif
45
46# Sanitizers can only be used with clang.
47ifneq ($(my_clang),true)
48  ifneq ($(my_sanitize),)
49    $(error $(LOCAL_PATH): $(LOCAL_MODULE): Use of sanitizers requires LOCAL_CLANG := true)
50  endif
51endif
52
53ifneq ($(filter default-ub,$(my_sanitize)),)
54  my_sanitize := $(CLANG_DEFAULT_UB_CHECKS)
55  my_ldlibs += -ldl
56
57  ifdef LOCAL_IS_HOST_MODULE
58    my_cflags += -fno-sanitize-recover=all
59  else
60    my_cflags += -fsanitize-undefined-trap-on-error
61  endif
62endif
63
64ifneq ($(my_sanitize),)
65  fsanitize_arg := $(subst $(space),$(comma),$(my_sanitize)),
66  my_cflags += -fsanitize=$(fsanitize_arg)
67
68  ifdef LOCAL_IS_HOST_MODULE
69    my_ldflags += -fsanitize=$(fsanitize_arg)
70  endif
71endif
72
73ifneq ($(filter address,$(my_sanitize)),)
74  # Frame pointer based unwinder in ASan requires ARM frame setup.
75  LOCAL_ARM_MODE := arm
76  my_cflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS)
77  my_ldflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS)
78  ifdef LOCAL_IS_HOST_MODULE
79    # -nodefaultlibs (provided with libc++) prevents the driver from linking
80    # libraries needed with -fsanitize=address. http://b/18650275 (WAI)
81    my_ldlibs += -lm -ldl -lpthread
82    my_ldflags += -Wl,--no-as-needed
83  else
84    # ASan runtime library must be the first in the link order.
85    my_shared_libraries := $($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_RUNTIME_LIBRARY) \
86                           $(my_shared_libraries) \
87                           $(ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES)
88    my_static_libraries += $(ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES)
89    my_ldflags += -Wl,-rpath,$($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_RPATH)
90  endif
91endif
92
93ifneq ($(filter undefined,$(my_sanitize)),)
94  ifdef LOCAL_IS_HOST_MODULE
95    my_ldlibs += -ldl
96  else
97    $(error ubsan is not yet supported on the target)
98  endif
99endif
100