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 * @build com.oracle.java.testlibrary.* 33 * @run main/othervm CdsDifferentObjectAlignment 34 * @bug 8025642 35 */ 36 37 import com.oracle.java.testlibrary.*; 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 63 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 64 "-XX:+UnlockDiagnosticVMOptions", 65 "-XX:SharedArchiveFile=./sample.jsa", 66 "-Xshare:dump", 67 createAlignmentArgument); 68 69 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 70 output.shouldContain("Loading classes to share"); 71 output.shouldHaveExitValue(0); 72 73 pb = ProcessTools.createJavaProcessBuilder( 74 "-XX:+UnlockDiagnosticVMOptions", 75 "-XX:SharedArchiveFile=./sample.jsa", 76 "-Xshare:on", 77 loadAlignmentArgument, 78 "-version"); 79 80 output = new OutputAnalyzer(pb.start()); 81 String expectedErrorMsg = 82 String.format( 83 "The shared archive file's ObjectAlignmentInBytes of %d " + 84 "does not equal the current ObjectAlignmentInBytes of %d", 85 createAlignment, 86 loadAlignment); 87 88 try { 89 output.shouldContain(expectedErrorMsg); 90 } catch (RuntimeException e) { 91 output.shouldContain("Unable to use shared archive"); 92 } 93 output.shouldHaveExitValue(1); 94 } 95 }