config_sanitizers.mk revision b32c0009a30098efbfb59a533bf3b213a3bbfb24 
1##############################################
2## Perform configuration steps for sanitizers.
3##############################################
4
5my_sanitize := $(strip $(LOCAL_SANITIZE))
6
7# Don't apply sanitizers to NDK code.
8ifdef LOCAL_SDK_VERSION
9  my_sanitize := never
10endif
11
12# Configure SANITIZE_HOST.
13ifdef LOCAL_IS_HOST_MODULE
14  ifeq ($(my_sanitize),)
15    my_sanitize := $(strip $(SANITIZE_HOST))
16
17    # SANTIZIZE_HOST=true is a deprecated way to say SANITIZE_HOST=address.
18    ifeq ($(my_sanitize),true)
19      my_sanitize := address
20    endif
21
22    # SANITIZE_HOST is only in effect if the module is already using clang (host
23    # modules that haven't set `LOCAL_CLANG := false` and device modules that
24    # have set `LOCAL_CLANG := true`.
25    ifneq ($(my_clang),true)
26      my_sanitize :=
27    endif
28  endif
29endif
30
31ifeq ($(my_sanitize),never)
32  my_sanitize :=
33endif
34
35# Sanitizers can only be used with clang.
36ifneq ($(my_clang),true)
37  ifneq ($(my_sanitize),)
38    $(error $(LOCAL_PATH): $(LOCAL_MODULE): Use of sanitizers requires LOCAL_CLANG := true)
39  endif
40endif
41
42ifneq ($(filter default-ub,$(my_sanitize)),)
43  my_sanitize := $(CLANG_DEFAULT_UB_CHECKS)
44
45  ifdef LOCAL_IS_HOST_MODULE
46    my_cflags += -fno-sanitize-recover=all
47    my_ldlibs += -ldl
48  else
49    my_cflags += -fsanitize-undefined-trap-on-error
50    my_shared_libraries += libdl
51  endif
52endif
53
54ifneq ($(my_sanitize),)
55  fsanitize_arg := $(subst $(space),$(comma),$(my_sanitize)),
56  my_cflags += -fsanitize=$(fsanitize_arg)
57
58  ifdef LOCAL_IS_HOST_MODULE
59    my_ldflags += -fsanitize=$(fsanitize_arg)
60  endif
61endif
62
63ifneq ($(filter address,$(my_sanitize)),)
64  # Frame pointer based unwinder in ASan requires ARM frame setup.
65  LOCAL_ARM_MODE := arm
66  my_cflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS)
67  my_ldflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS)
68  ifdef LOCAL_IS_HOST_MODULE
69    # -nodefaultlibs (provided with libc++) prevents the driver from linking
70    # libraries needed with -fsanitize=address. http://b/18650275 (WAI)
71    my_ldlibs += -lm -ldl -lpthread
72    my_ldflags += -Wl,--no-as-needed
73  else
74    # ASan runtime library must be the first in the link order.
75    my_shared_libraries := $($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_RUNTIME_LIBRARY) \
76                           $(my_shared_libraries) \
77                           $(ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES)
78    my_static_libraries += $(ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES)
79    my_ldflags += -Wl,-rpath,$($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_RPATH)
80  endif
81endif
82
83ifneq ($(filter undefined,$(my_sanitize)),)
84  my_cflags += -fno-sanitize-recover=all
85
86  ifdef LOCAL_IS_HOST_MODULE
87    my_ldlibs += -ldl
88  else
89    $(error ubsan is not yet supported on the target)
90  endif
91endif
92
93
94ifneq ($(strip $(LOCAL_SANITIZE_RECOVER)),)
95  recover_arg := $(subst $(space),$(comma),$(LOCAL_SANITIZE_RECOVER)),
96  my_cflags += -fsanitize-recover=$(recover_arg)
97endif
98
99ifeq ($(strip $(LOCAL_DETECT_INTEGER_OVERFLOWS)),true)
100  ifeq ($(my_clang),true)
101    my_cflags += -fsanitize=signed-integer-overflow,unsigned-integer-overflow
102    my_cflags += -ftrap-function=abort
103    my_cflags += -fsanitize-undefined-trap-on-error
104  else
105    $(error $(LOCAL_MODULE): You must enable LOCAL_CLANG:=true to use LOCAL_DETECT_INTEGER_OVERFLOWS)
106  endif
107endif
108