8331298: avoid alignment checks in UBSAN enabled build

MBaesken · MBaesken · commit 6e66ee15b13c · 2024-05-17T06:37:54.000Z
Backport-of: 60b61e588c1252b4b1fbc64d0f818a85670f7146
diff --git a/make/autoconf/jdk-options.m4 b/make/autoconf/jdk-options.m4
@@ -502,7 +502,7 @@ AC_DEFUN_ONCE([JDKOPT_SETUP_UNDEFINED_BEHAVIOR_SANITIZER],
 [
   # 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"
+  UBSAN_CHECKS="-fsanitize=undefined -fsanitize=float-divide-by-zero -fno-sanitize=shift-base -fno-sanitize=alignment"
   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,

Original file line number	Diff line number	Diff line change
`@@ -502,7 +502,7 @@ AC_DEFUN_ONCE([JDKOPT_SETUP_UNDEFINED_BEHAVIOR_SANITIZER],`
`502`	`502`	`[`
`503`	`503`	`# GCC reports lots of likely false positives for stringop-truncation and format-overflow.`
`504`	`504`	`# Silence them for now.`
`505`		`- UBSAN_CHECKS="-fsanitize=undefined -fsanitize=float-divide-by-zero -fno-sanitize=shift-base"`
	`505`	`+ UBSAN_CHECKS="-fsanitize=undefined -fsanitize=float-divide-by-zero -fno-sanitize=shift-base -fno-sanitize=alignment"`
`506`	`506`	`UBSAN_CFLAGS="$UBSAN_CHECKS -Wno-stringop-truncation -Wno-format-overflow -fno-omit-frame-pointer -DUNDEFINED_BEHAVIOR_SANITIZER"`
`507`	`507`	`UBSAN_LDFLAGS="$UBSAN_CHECKS"`
`508`	`508`	`UTIL_ARG_ENABLE(NAME: ubsan, DEFAULT: false, RESULT: UBSAN_ENABLED,`