8334618: ubsan: support setting additional ubsan check options

Reviewed-by: stuefe, lucy

Author: MBaesken

make/autoconf/jdk-options.m4

@@ -496,9 +496,15 @@ AC_DEFUN_ONCE([JDKOPT_SETUP_LEAK_SANITIZER],
 #
 AC_DEFUN_ONCE([JDKOPT_SETUP_UNDEFINED_BEHAVIOR_SANITIZER],
 [
+  UTIL_ARG_WITH(NAME: additional-ubsan-checks, TYPE: string,
+      DEFAULT: [],
+      DESC: [Customizes the ubsan checks],
+      OPTIONAL: true)
+
   # GCC reports lots of likely false positives for stringop-truncation and format-overflow.
   # Silence them for now.
-  UBSAN_CHECKS="-fsanitize=undefined -fsanitize=float-divide-by-zero -fno-sanitize=shift-base -fno-sanitize=alignment"
+  UBSAN_CHECKS="-fsanitize=undefined -fsanitize=float-divide-by-zero -fno-sanitize=shift-base -fno-sanitize=alignment \
+      $ADDITIONAL_UBSAN_CHECKS"
   UBSAN_CFLAGS="$UBSAN_CHECKS -Wno-stringop-truncation -Wno-format-overflow -fno-omit-frame-pointer -DUNDEFINED_BEHAVIOR_SANITIZER"
   UBSAN_LDFLAGS="$UBSAN_CHECKS"
   UTIL_ARG_ENABLE(NAME: ubsan, DEFAULT: false, RESULT: UBSAN_ENABLED,