1 /* 2 * Copyright (c) 2013, 2014, 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 */ 34 35 import com.oracle.java.testlibrary.*; 36 37 public class CdsDifferentObjectAlignment { 38 public static void main(String[] args) throws Exception { 39 String nativeWordSize = System.getProperty("sun.arch.data.model"); 40 if (!Platform.is64bit()) { 41 System.out.println("ObjectAlignmentInBytes for CDS is only " + 42 "supported on 64bit platforms; this plaform is " + 43 nativeWordSize); 44 System.out.println("Skipping the test"); 45 } else { 46 createAndLoadSharedArchive(16, 64); 47 createAndLoadSharedArchive(64, 32); 48 } 49 } 50 51 52 // Parameters are object alignment expressed in bytes 53 private static void 54 createAndLoadSharedArchive(int createAlignment, int loadAlignment) 55 throws Exception { 56 String createAlignmentArgument = "-XX:ObjectAlignmentInBytes=" + 57 createAlignment; 58 String loadAlignmentArgument = "-XX:ObjectAlignmentInBytes=" + 59 loadAlignment; 60 61 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 62 "-XX:+UnlockDiagnosticVMOptions", 63 "-XX:SharedArchiveFile=./sample.jsa", 64 "-Xshare:dump", 65 createAlignmentArgument); 66 67 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 68 output.shouldContain("Loading classes to share"); 69 output.shouldHaveExitValue(0); 70 71 pb = ProcessTools.createJavaProcessBuilder( 72 "-XX:+UnlockDiagnosticVMOptions", 73 "-XX:SharedArchiveFile=./sample.jsa", 74 "-Xshare:on", 75 loadAlignmentArgument, 76 "-version"); 77 78 output = new OutputAnalyzer(pb.start()); 79 String expectedErrorMsg = 80 String.format( 81 "The shared archive file's ObjectAlignmentInBytes of %d " + 82 "does not equal the current ObjectAlignmentInBytes of %d", 83 createAlignment, 84 loadAlignment); 85 86 try { 87 output.shouldContain(expectedErrorMsg); 88 } catch (RuntimeException e) { 89 output.shouldContain("Unable to use shared archive"); 90 } 91 output.shouldHaveExitValue(1); 92 } 93 }