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Dan Albert4ae5d4b2014-10-31 16:23:08 -07001##############################################
2## Perform configuration steps for sanitizers.
3##############################################
4
Dan Albert27ccb752015-04-16 16:21:02 -07005my_sanitize := $(strip $(LOCAL_SANITIZE))
Dan Albert08cca282014-12-11 18:56:26 -08006
Dan Albert4c401412015-08-19 20:13:33 -07007# SANITIZE_HOST is only in effect if the module is already using clang (host
8# modules that haven't set `LOCAL_CLANG := false` and device modules that
9# have set `LOCAL_CLANG := true`.
10my_global_sanitize :=
11ifeq ($(my_clang),true)
12 ifdef LOCAL_IS_HOST_MODULE
13 my_global_sanitize := $(strip $(SANITIZE_HOST))
14
15 # SANITIZE_HOST=true is a deprecated way to say SANITIZE_HOST=address.
16 my_global_sanitize := $(subst true,address,$(my_global_sanitize))
17 else
18 my_global_sanitize := $(strip $(SANITIZE_TARGET))
19 endif
20endif
21
22# The sanitizer specified by the environment wins over the module.
23ifneq ($(my_global_sanitize),)
24 my_sanitize := $(my_global_sanitize)
25endif
26
Dan Albert08cca282014-12-11 18:56:26 -080027# Don't apply sanitizers to NDK code.
28ifdef LOCAL_SDK_VERSION
Dan Albert4c401412015-08-19 20:13:33 -070029 my_sanitize :=
Dan Albert27ccb752015-04-16 16:21:02 -070030endif
31
Dan Albert4c401412015-08-19 20:13:33 -070032# Never always wins.
33ifeq ($(LOCAL_SANITIZE),never)
Dan Albert08cca282014-12-11 18:56:26 -080034 my_sanitize :=
35endif
36
Evgenii Stepanov42823662016-05-12 13:07:17 -070037my_nosanitize = $(strip $(LOCAL_NOSANITIZE))
38ifneq ($(my_nosanitize),)
39 my_sanitize := $(filter-out $(my_nosanitize),$(my_sanitize))
40endif
41
Dan Alberta6311b72015-07-30 10:17:33 -070042# TSAN is not supported on 32-bit architectures. For non-multilib cases, make
43# its use an error. For multilib cases, don't use it for the 32-bit case.
44ifneq ($(filter thread,$(my_sanitize)),)
45 ifeq ($(my_32_64_bit_suffix),32)
46 ifeq ($(my_module_multilib),both)
47 my_sanitize := $(filter-out thread,$(my_sanitize))
48 else
49 $(error $(LOCAL_PATH): $(LOCAL_MODULE): TSAN cannot be used for 32-bit modules.)
50 endif
51 endif
52endif
53
Evgenii Stepanov5adfcb12015-06-25 16:38:25 -070054# Undefined symbols can occur if a non-sanitized library links
55# sanitized static libraries. That's OK, because the executable
56# always depends on the ASan runtime library, which defines these
57# symbols.
58ifneq ($(strip $(SANITIZE_TARGET)),)
59 ifndef LOCAL_IS_HOST_MODULE
60 ifeq ($(LOCAL_MODULE_CLASS),SHARED_LIBRARIES)
61 ifeq ($(my_sanitize),)
62 my_allow_undefined_symbols := true
63 endif
64 endif
Evgenii Stepanov4b396e42015-07-20 16:32:53 -070065 # Workaround for a bug in AddressSanitizer that breaks stack unwinding.
66 # https://code.google.com/p/address-sanitizer/issues/detail?id=387
67 # Revert when external/compiler-rt is updated past r236014.
68 LOCAL_PACK_MODULE_RELOCATIONS := false
Evgenii Stepanov5adfcb12015-06-25 16:38:25 -070069 endif
70endif
71
Dan Albert94b57912015-04-17 09:48:33 -070072# Sanitizers can only be used with clang.
73ifneq ($(my_clang),true)
74 ifneq ($(my_sanitize),)
75 $(error $(LOCAL_PATH): $(LOCAL_MODULE): Use of sanitizers requires LOCAL_CLANG := true)
76 endif
77endif
78
Dan Albertb5b2ffe2015-04-16 18:07:07 -070079ifneq ($(filter default-ub,$(my_sanitize)),)
80 my_sanitize := $(CLANG_DEFAULT_UB_CHECKS)
Dan Albert08cca282014-12-11 18:56:26 -080081endif
82
Ivan Krasin74b32b82015-09-18 11:54:43 -070083ifneq ($(filter coverage,$(my_sanitize)),)
84 ifeq ($(filter address,$(my_sanitize)),)
85 $(error $(LOCAL_PATH): $(LOCAL_MODULE): Use of 'coverage' also requires 'address')
86 endif
87 my_cflags += -fsanitize-coverage=edge,indirect-calls,8bit-counters,trace-cmp
88 my_sanitize := $(filter-out coverage,$(my_sanitize))
89endif
90
Dan Albert08cca282014-12-11 18:56:26 -080091ifneq ($(my_sanitize),)
Stephen Hinese8119e92015-11-09 16:32:11 -080092 fsanitize_arg := $(subst $(space),$(comma),$(my_sanitize))
Dan Albert08cca282014-12-11 18:56:26 -080093 my_cflags += -fsanitize=$(fsanitize_arg)
94
95 ifdef LOCAL_IS_HOST_MODULE
Dan Albertabf4bc92015-06-16 23:27:34 -070096 my_cflags += -fno-sanitize-recover=all
Dan Albert08cca282014-12-11 18:56:26 -080097 my_ldflags += -fsanitize=$(fsanitize_arg)
Dan Albert29224112015-08-13 17:25:10 -070098 my_ldlibs += -lrt -ldl
Dan Albertabf4bc92015-06-16 23:27:34 -070099 else
Stephen Hinese8119e92015-11-09 16:32:11 -0800100 ifeq ($(filter address,$(my_sanitize)),)
101 my_cflags += -fsanitize-trap=all
102 my_cflags += -ftrap-function=abort
103 endif
Evgenii Stepanov55f73e62016-05-12 13:07:36 -0700104 ifneq ($(filter address thread,$(my_sanitize)),)
105 my_shared_libraries += libdl
106 endif
Dan Albert08cca282014-12-11 18:56:26 -0800107 endif
108endif
109
Chih-Hung Hsiehad741e62016-03-09 14:54:55 -0800110# If local or global modules need ASAN, add linker flags.
111ifneq ($(filter address,$(my_global_sanitize) $(my_sanitize)),)
Dan Albert4ae5d4b2014-10-31 16:23:08 -0700112 my_ldflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS)
113 ifdef LOCAL_IS_HOST_MODULE
Dan Albert08cca282014-12-11 18:56:26 -0800114 # -nodefaultlibs (provided with libc++) prevents the driver from linking
115 # libraries needed with -fsanitize=address. http://b/18650275 (WAI)
Dan Albertabf4bc92015-06-16 23:27:34 -0700116 my_ldlibs += -lm -lpthread
Dan Albert1f0d5302015-04-28 14:55:50 -0700117 my_ldflags += -Wl,--no-as-needed
Dan Albert4ae5d4b2014-10-31 16:23:08 -0700118 else
Chih-Hung Hsiehad741e62016-03-09 14:54:55 -0800119 # Add asan libraries unless LOCAL_MODULE is the asan library.
Evgenii Stepanovf0b15e12015-04-24 16:34:47 -0700120 # ASan runtime library must be the first in the link order.
Chih-Hung Hsiehad741e62016-03-09 14:54:55 -0800121 ifeq (,$(filter $(LOCAL_MODULE),$($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_RUNTIME_LIBRARY)))
122 my_shared_libraries := $($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_RUNTIME_LIBRARY) \
123 $(my_shared_libraries)
124 endif
125 ifeq (,$(filter $(LOCAL_MODULE),$(ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES)))
126 my_static_libraries += $(ADDRESS_SANITIZER_CONFIG_EXTRA_STATIC_LIBRARIES)
127 endif
128
129 # Do not add unnecessary dependency in shared libraries.
130 ifeq ($(LOCAL_MODULE_CLASS),SHARED_LIBRARIES)
131 my_ldflags += -Wl,--as-needed
132 endif
Ying Wanga05e2222015-08-17 16:13:24 -0700133
Evgenii Stepanov8f5e67a2015-07-10 18:06:51 -0700134 my_linker := $($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_LINKER)
Ying Wanga05e2222015-08-17 16:13:24 -0700135 # Make sure linker_asan get installed.
136 $(LOCAL_INSTALLED_MODULE) : | $(PRODUCT_OUT)$($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_LINKER)
Dan Albert08cca282014-12-11 18:56:26 -0800137 endif
138endif
139
Chih-Hung Hsiehad741e62016-03-09 14:54:55 -0800140# If local module needs ASAN, add compiler flags.
141ifneq ($(filter address,$(my_sanitize)),)
142 # Frame pointer based unwinder in ASan requires ARM frame setup.
143 LOCAL_ARM_MODE := arm
144 my_cflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_CFLAGS)
145 ifndef LOCAL_IS_HOST_MODULE
146 my_cflags += -mllvm -asan-globals=0
147 endif
148endif
149
Dan Albert08cca282014-12-11 18:56:26 -0800150ifneq ($(filter undefined,$(my_sanitize)),)
Dan Albertabf4bc92015-06-16 23:27:34 -0700151 ifndef LOCAL_IS_HOST_MODULE
Dan Albert08cca282014-12-11 18:56:26 -0800152 $(error ubsan is not yet supported on the target)
Dan Albert4ae5d4b2014-10-31 16:23:08 -0700153 endif
154endif
Dan Albert4111d482015-04-16 18:08:44 -0700155
Dan Albert9f176552015-04-28 11:26:45 -0700156ifneq ($(strip $(LOCAL_SANITIZE_RECOVER)),)
157 recover_arg := $(subst $(space),$(comma),$(LOCAL_SANITIZE_RECOVER)),
Dan Albert4111d482015-04-16 18:08:44 -0700158 my_cflags += -fsanitize-recover=$(recover_arg)
159endif