config_sanitizers.mk revision abf4bc916ab136eb1d5658632c63f950890f3eed 
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 := $(CLANG_DEFAULT_UB_CHECKS)
44endif
45
46ifneq ($(my_sanitize),)
47  fsanitize_arg := $(subst $(space),$(comma),$(my_sanitize)),
48  my_cflags += -fsanitize=$(fsanitize_arg)
49
50  ifdef LOCAL_IS_HOST_MODULE
51    my_cflags += -fno-sanitize-recover=all
52    my_ldflags += -fsanitize=$(fsanitize_arg)
53    my_ldlibs += -ldl
54  else
55    my_cflags += -fsanitize-undefined-trap-on-error
56    my_cflags += -ftrap-function=abort
57    my_shared_libraries += libdl
58  endif
59endif
60
61ifneq ($(filter address,$(my_sanitize)),)
62  # Frame pointer based unwinder in ASan requires ARM frame setup.
63  LOCAL_ARM_MODE := arm
64  my_cflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS)
65  my_ldflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS)
66  ifdef LOCAL_IS_HOST_MODULE
67    # -nodefaultlibs (provided with libc++) prevents the driver from linking
68    # libraries needed with -fsanitize=address. http://b/18650275 (WAI)
69    my_ldlibs += -lm -lpthread
70    my_ldflags += -Wl,--no-as-needed
71  else
72    # ASan runtime library must be the first in the link order.
73    my_shared_libraries := $($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_RUNTIME_LIBRARY) \
74                           $(my_shared_libraries) \
75                           $(ADDRESS_SANITIZER_CONFIG_EXTRA_SHARED_LIBRARIES)
76    my_static_libraries += $(ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES)
77    my_ldflags += -Wl,-rpath,$($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_RPATH)
78  endif
79endif
80
81ifneq ($(filter undefined,$(my_sanitize)),)
82  ifndef LOCAL_IS_HOST_MODULE
83    $(error ubsan is not yet supported on the target)
84  endif
85endif
86
87ifneq ($(strip $(LOCAL_SANITIZE_RECOVER)),)
88  recover_arg := $(subst $(space),$(comma),$(LOCAL_SANITIZE_RECOVER)),
89  my_cflags += -fsanitize-recover=$(recover_arg)
90endif
91