1 /* 2 * Copyright (c) 2013, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test CdsSameObjectAlignment 26 * @summary Testing CDS (class data sharing) using varying object alignment. 27 * Using same object alignment for each dump/load pair 28 * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true) 29 * @library /test/lib 30 * @modules java.base/jdk.internal.misc 31 * java.management 32 */ 33 34 import jdk.test.lib.Platform; 35 import jdk.test.lib.cds.CDSTestUtils; 36 import jdk.test.lib.process.OutputAnalyzer; 37 38 public class CdsSameObjectAlignment { 39 public static void main(String[] args) throws Exception { 40 String nativeWordSize = System.getProperty("sun.arch.data.model"); 41 if (!Platform.is64bit()) { 42 System.out.println("ObjectAlignmentInBytes for CDS is only " + 43 "supported on 64bit platforms; this plaform is " + 44 nativeWordSize); 45 System.out.println("Skipping the test"); 46 } else { 47 dumpAndLoadSharedArchive(8); 48 dumpAndLoadSharedArchive(16); 49 dumpAndLoadSharedArchive(32); 50 dumpAndLoadSharedArchive(64); 51 } 52 } 53 54 private static void 55 dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception { 56 String objectAlignmentArg = "-XX:ObjectAlignmentInBytes=" 57 + objectAlignmentInBytes; 58 System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = " 59 + objectAlignmentInBytes); 60 61 CDSTestUtils.createArchiveAndCheck(objectAlignmentArg); 62 CDSTestUtils.runWithArchiveAndCheck(objectAlignmentArg); 63 } 64 }