libcxx: Disable dynamic type checking when enabling libcxxabi

It results in a recursive call, cxxabiv1::__dynamic_case -> is_equal -> __ubsan::checkDynamic -> cxxabiv1::__dynamic_case

Signed-off-by: yinshengkai <[email protected]>

Author: Gary-Hobson

libs/libxx/libcxxabi.cmake

@@ -96,6 +96,10 @@ endforeach()
 # RTTI is required for building the libcxxabi library
 target_compile_options(libcxxabi PRIVATE -frtti)
 
+if(CONFIG_SIM_UBSAN OR CONFIG_MM_UBSAN)
+  target_compile_options(libcxxabi PRIVATE -fno-sanitize=vptr)
+endif()
+
 target_sources(libcxxabi PRIVATE ${TARGET_SRCS})
 target_compile_options(libcxxabi PRIVATE -frtti)
 target_include_directories(

libs/libxx/libcxxabi.defs

@@ -47,6 +47,14 @@ endif
 ifeq ($(CONFIG_LIBCXXABI), y)
 CXXFLAGS += ${DEFINE_PREFIX}LIBCXX_BUILDING_LIBCXXABI
 CXXFLAGS += -I $(TOPDIR)/libs/libxx/libcxxabi/include
+
+# Disable dynamic type checking when enabling libcxxabi
+# It results in a recursive call:
+# cxxabiv1::__dynamic_case -> is_equal -> __ubsan::checkDynamic -> cxxabiv1::__dynamic_case
+
+ifneq ($(CONFIG_SIM_UBSAN)${CONFIG_MM_UBSAN},)
+CXXFLAGS += -fno-sanitize=vptr
+endif
 endif
 
 # C++ABI files