commit 202c7a786c17cc8747c1aa2fed70de47aabfa227
author Evgenii Stepanov <eugenis@google.com> Thu Jul 07 10:56:39 2016 -0700
committer Evgenii Stepanov <eugenis@google.com> Mon Aug 29 15:06:57 2016 -0700
tree 748043ee168bbf02bdef7ed98617c419d7468070
parent ce4c49c2f2ea66892548d1ca004e9e9cc2045f29

Enable LOCAL_SANITIZE:=cfi and add LOCAL_SANITIZE_DIAG.

Bug: 22033465

Change-Id: Ie011f888f55a2cfb5c943070a3844cb541812afe

core/config_sanitizers.mk

diff --git a/core/config_sanitizers.mk b/core/config_sanitizers.mk
index ac3e4fc..2e14fef 100644
--- a/core/config_sanitizers.mk
+++ b/core/config_sanitizers.mk
@@ -133,6 +133,11 @@
   endif
 endif
 
+ifneq ($(filter cfi,$(my_sanitize)),)
+  my_cflags += -flto -fsanitize-cfi-cross-dso -fvisibility=default
+  my_ldflags += -flto -fsanitize-cfi-cross-dso -fsanitize=cfi -Wl,-plugin-opt,O1 -Wl,-export-dynamic-symbol=__cfi_check
+endif
+
 # If local or global modules need ASAN, add linker flags.
 ifneq ($(filter address,$(my_global_sanitize) $(my_sanitize)),)
   my_ldflags += $(ADDRESS_SANITIZER_CONFIG_EXTRA_LDFLAGS)
@@ -187,3 +192,13 @@
   recover_arg := $(subst $(space),$(comma),$(LOCAL_SANITIZE_RECOVER)),
   my_cflags += -fsanitize-recover=$(recover_arg)
 endif
+
+ifneq ($(strip $(LOCAL_SANITIZE_DIAG)),)
+  notrap_arg := $(subst $(space),$(comma),$(LOCAL_SANITIZE_DIAG)),
+  my_cflags += -fno-sanitize-trap=$(notrap_arg)
+  # Diagnostic requires a runtime library, unless ASan or TSan are also enabled.
+  ifeq ($(filter address thread,$(my_sanitize)),)
+    # Does not have to be the first DT_NEEDED unlike ASan.
+    my_shared_libraries += $($(LOCAL_2ND_ARCH_VAR_PREFIX)UBSAN_RUNTIME_LIBRARY)
+  endif
+endif