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 * @requires vm.cds 27 * @summary Testing CDS (class data sharing) using varying object alignment. 28 * Using same object alignment for each dump/load pair 29 * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true) 30 * @library /test/lib 31 * @modules java.base/jdk.internal.misc 32 * java.management 33 */ 34 35 import jdk.test.lib.Platform; 36 import jdk.test.lib.cds.CDSTestUtils; 37 import jdk.test.lib.process.OutputAnalyzer; 38 39 public class CdsSameObjectAlignment { 40 public static void main(String[] args) throws Exception { 41 String nativeWordSize = System.getProperty("sun.arch.data.model"); 42 if (!Platform.is64bit()) { 43 System.out.println("ObjectAlignmentInBytes for CDS is only " + 44 "supported on 64bit platforms; this plaform is " + 45 nativeWordSize); 46 System.out.println("Skipping the test"); 47 } else { 48 dumpAndLoadSharedArchive(8); 49 dumpAndLoadSharedArchive(16); 50 dumpAndLoadSharedArchive(32); 51 dumpAndLoadSharedArchive(64); 52 } 53 } 54 55 private static void 56 dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception { 57 String objectAlignmentArg = "-XX:ObjectAlignmentInBytes=" 58 + objectAlignmentInBytes; 59 System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = " 60 + objectAlignmentInBytes); 61 62 CDSTestUtils.createArchiveAndCheck(objectAlignmentArg); 63 CDSTestUtils.runWithArchiveAndCheck(objectAlignmentArg); 64 } 65 }