| /* |
| * Copyright (c) 2023 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. |
| * |
| */ |
| |
| /* |
| * @test |
| * @bug 8316746 |
| * @summary During OSR, locks get transferred from interpreter frame. |
| * Check that unlocking 2 such locks works in the OSR compiled nmethod. |
| * Some platforms verify that the unlocking happens in the corrent order. |
| * |
| * @run main/othervm -Xbatch TestUnlockOSR |
| */ |
| |
| public class TestUnlockOSR { |
| static void test_method(Object a, Object b, int limit) { |
| synchronized(a) { // allocate space for monitors |
| synchronized(b) { |
| } |
| } // free space to test allocation in reused space |
| synchronized(a) { // reuse the space |
| synchronized(b) { |
| for (int i = 0; i < limit; i++) {} |
| } |
| } |
| } |
| |
| public static void main(String[] args) { |
| Object a = new TestUnlockOSR(), |
| b = new TestUnlockOSR(); |
| // avoid uncommon trap before last unlocks |
| for (int i = 0; i < 100; i++) { test_method(a, b, 0); } |
| // trigger OSR |
| test_method(a, b, 100000); |
| } |
| } |
