8340801: Disable ubsan checks in some awt/2d coding

Reviewed-by: ihse, lucy, goetz, jwaters

src/java.base/share/native/libjava/ub.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2024 SAP SE. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef _UB_H_
+#define _UB_H_
+
+/* ATTRIBUTE_NO_UBSAN - Function attribute which informs the compiler to disable UBSan checks in the
+ * following function or method.
+ */
+#ifdef UNDEFINED_BEHAVIOR_SANITIZER
+#if defined(__clang__) || defined(__GNUC__)
+#define ATTRIBUTE_NO_UBSAN __attribute__((no_sanitize("undefined")))
+#endif
+#endif
+
+#ifndef ATTRIBUTE_NO_UBSAN
+#define ATTRIBUTE_NO_UBSAN
+#endif
+
+#endif