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 CdsDifferentObjectAlignment 26 * @summary Testing CDS (class data sharing) using varying object alignment. 27 * Using different object alignment for each dump/load pair. 28 * This is a negative test; using object alignment for loading that 29 * is different from object alignment for creating a CDS file 30 * should fail when loading. 31 * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true) 32 * @library /test/lib 33 * @bug 8025642 34 * @modules java.base/jdk.internal.misc 35 * java.management 36 */ 37 38 import jdk.test.lib.cds.CDSTestUtils; 39 import jdk.test.lib.process.OutputAnalyzer; 40 import jdk.test.lib.Platform; 41 42 public class CdsDifferentObjectAlignment { 43 public static void main(String[] args) throws Exception { 44 String nativeWordSize = System.getProperty("sun.arch.data.model"); 45 if (!Platform.is64bit()) { 46 System.out.println("ObjectAlignmentInBytes for CDS is only " + 47 "supported on 64bit platforms; this plaform is " + 48 nativeWordSize); 49 System.out.println("Skipping the test"); 50 } else { 51 createAndLoadSharedArchive(16, 64); 52 createAndLoadSharedArchive(64, 32); 53 } 54 } 55 56 57 // Parameters are object alignment expressed in bytes 58 private static void 59 createAndLoadSharedArchive(int createAlignment, int loadAlignment) 60 throws Exception { 61 String createAlignmentArgument = "-XX:ObjectAlignmentInBytes=" + 62 createAlignment; 63 String loadAlignmentArgument = "-XX:ObjectAlignmentInBytes=" + 64 loadAlignment; 65 String expectedErrorMsg = 66 String.format( 67 "The shared archive file's ObjectAlignmentInBytes of %d " + 68 "does not equal the current ObjectAlignmentInBytes of %d", 69 createAlignment, 70 loadAlignment); 71 72 CDSTestUtils.createArchiveAndCheck(createAlignmentArgument); 73 74 OutputAnalyzer out = CDSTestUtils.runWithArchive(loadAlignmentArgument); 75 CDSTestUtils.checkExecExpectError(out, 1, expectedErrorMsg); 76 } 77 }