Add LOCAL_SANITIZE_RECOVER.

This is needed for projects that have known ubsan issues that we can't
fix right away (perhaps because it's an upstream project that we're
diligent about keeping in sync with upsteam).

Also make the normal ubsan use -fno-sanitize-recover=all by default.

Change-Id: I1b0f3309792f32dbd08c18816d7306e76c8d7c30

core/clear_vars.mk

@@ -173,6 +173,7 @@ LOCAL_NATIVE_COVERAGE :=
 LOCAL_DPI_VARIANTS:=
 LOCAL_DPI_FILE_STEM:=
 LOCAL_SANITIZE:=
+LOCAL_SANITIZE_RECOVER:=
 
 # arch specific variables
 LOCAL_SRC_FILES_$(TARGET_ARCH):=

core/config_sanitizers.mk

@@ -86,9 +86,17 @@ ifneq ($(filter address,$(my_sanitize)),)
 endif
 
 ifneq ($(filter undefined,$(my_sanitize)),)
+  my_cflags += -fno-sanitize-recover=all
+
   ifdef LOCAL_IS_HOST_MODULE
     my_ldlibs += -ldl
   else
     $(error ubsan is not yet supported on the target)
   endif
 endif
+
+
+ifeq ($(strip $(LOCAL_SANITIZE_RECOVER)),true)
+  recover_arg := $(subst $(space),$(comma),$(my_sanitize)),
+  my_cflags += -fsanitize-recover=$(recover_arg)
+endif