1 /* 2 * Copyright (c) 2013, 2016, 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 /test/lib 32 * @bug 8025642 33 * @modules java.base/jdk.internal.misc 34 * java.management 35 */ 36 37 import jdk.test.lib.process.ProcessTools; 38 import jdk.test.lib.process.OutputAnalyzer; 39 import jdk.test.lib.Platform; 40 41 public class CdsDifferentObjectAlignment { 42 public static void main(String[] args) throws Exception { 43 String nativeWordSize = System.getProperty("sun.arch.data.model"); 44 if (!Platform.is64bit()) { 45 System.out.println("ObjectAlignmentInBytes for CDS is only " + 46 "supported on 64bit platforms; this plaform is " + 47 nativeWordSize); 48 System.out.println("Skipping the test"); 49 } else { 50 createAndLoadSharedArchive(16, 64); 51 createAndLoadSharedArchive(64, 32); 52 } 53 } 54 55 56 // Parameters are object alignment expressed in bytes 57 private static void 58 createAndLoadSharedArchive(int createAlignment, int loadAlignment) 59 throws Exception { 60 String createAlignmentArgument = "-XX:ObjectAlignmentInBytes=" + 61 createAlignment; 62 String loadAlignmentArgument = "-XX:ObjectAlignmentInBytes=" + 63 loadAlignment; 64 String filename = "./CdsDifferentObjectAlignment" + createAlignment + ".jsa"; 65 66 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 67 "-XX:+UnlockDiagnosticVMOptions", 68 "-XX:SharedArchiveFile=" + filename, 69 "-Xshare:dump", 70 createAlignmentArgument); 71 72 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 73 output.shouldContain("Loading classes to share"); 74 output.shouldHaveExitValue(0); 75 76 pb = ProcessTools.createJavaProcessBuilder( 77 "-XX:+UnlockDiagnosticVMOptions", 78 "-XX:SharedArchiveFile=" + filename, 79 "-Xshare:on", 80 loadAlignmentArgument, 81 "-version"); 82 83 output = new OutputAnalyzer(pb.start()); 84 String expectedErrorMsg = 85 String.format( 86 "The shared archive file's ObjectAlignmentInBytes of %d " + 87 "does not equal the current ObjectAlignmentInBytes of %d", 88 createAlignment, 89 loadAlignment); 90 91 try { 92 output.shouldContain(expectedErrorMsg); 93 } catch (RuntimeException e) { 94 output.shouldContain("Unable to use shared archive"); 95 } 96 output.shouldHaveExitValue(1); 97 } 98 }