/* * Copyright (c) 2023, Oracle and/or its affiliates. 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. */ /** * @test * @bug 8310126 * @summary Test that the Reference::get intrinsic works with a null argument. * @run main/othervm -XX:TieredStopAtLevel=1 -XX:CompileCommand=compileonly,*TestReferenceGetWithNull::test -Xbatch * compiler.intrinsics.TestReferenceGetWithNull */ package compiler.intrinsics; import java.lang.ref.WeakReference; public class TestReferenceGetWithNull { // Declare final such that static binding at the call site is possible static final class MyReference extends WeakReference { public MyReference(T referent) { super(referent); } } static void test(MyReference r) { try { r.get(); } catch (Exception e) { // Ignore } } public static void main(String[] args) { // Make sure MyReference is loaded MyReference obj = new MyReference<>(args); // Trigger compilation for (int i = 0; i < 50_000; ++i) { test(null); } } }