1 /* 2 * Copyright (c) 2013, 2015, 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 * @library /testlibrary 32 * @bug 8025642 33 * @modules java.base/sun.misc 34 * java.management 35 */ 36 37 import jdk.test.lib.*; 38 39 public class CdsDifferentObjectAlignment { 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 createAndLoadSharedArchive(16, 64); 49 createAndLoadSharedArchive(64, 32); 50 } 51 } 52 53 54 // Parameters are object alignment expressed in bytes 55 private static void 56 createAndLoadSharedArchive(int createAlignment, int loadAlignment) 57 throws Exception { 58 String createAlignmentArgument = "-XX:ObjectAlignmentInBytes=" + 59 createAlignment; 60 String loadAlignmentArgument = "-XX:ObjectAlignmentInBytes=" + 61 loadAlignment; 62 String filename = "./CdsDifferentObjectAlignment" + createAlignment + ".jsa"; 63 64 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 65 "-XX:+UnlockDiagnosticVMOptions", 66 "-XX:SharedArchiveFile=" + filename, 67 "-Xshare:dump", 68 createAlignmentArgument); 69 70 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 71 output.shouldContain("Loading classes to share"); 72 output.shouldHaveExitValue(0); 73 74 pb = ProcessTools.createJavaProcessBuilder( 75 "-XX:+UnlockDiagnosticVMOptions", 76 "-XX:SharedArchiveFile=" + filename, 77 "-Xshare:on", 78 loadAlignmentArgument, 79 "-version"); 80 81 output = new OutputAnalyzer(pb.start()); 82 String expectedErrorMsg = 83 String.format( 84 "The shared archive file's ObjectAlignmentInBytes of %d " + 85 "does not equal the current ObjectAlignmentInBytes of %d", 86 createAlignment, 87 loadAlignment); 88 89 try { 90 output.shouldContain(expectedErrorMsg); 91 } catch (RuntimeException e) { 92 output.shouldContain("Unable to use shared archive"); 93 } 94 output.shouldHaveExitValue(1); 95 } 96 }