1 /* 2 * Copyright (c) 2013, 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 CdsSameObjectAlignment 26 * @summary Testing CDS (class data sharing) using varying object alignment. 27 * Using same object alignment for each dump/load pair 28 * @library /testlibrary 29 */ 30 31 import com.oracle.java.testlibrary.*; 32 33 public class CdsSameObjectAlignment { 34 public static void main(String[] args) throws Exception { 35 String nativeWordSize = System.getProperty("sun.arch.data.model"); 36 if (!Platform.is64bit()) { 37 System.out.println("ObjectAlignmentInBytes for CDS is only " + 38 "supported on 64bit platforms; this plaform is " + 39 nativeWordSize); 40 System.out.println("Skipping the test"); 41 } else { 42 dumpAndLoadSharedArchive(8); 43 dumpAndLoadSharedArchive(16); 44 dumpAndLoadSharedArchive(32); 45 dumpAndLoadSharedArchive(64); 46 } 47 } 48 49 private static void 50 dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception { 51 String objectAlignmentArg = "-XX:ObjectAlignmentInBytes=" 52 + objectAlignmentInBytes; 53 System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = " 54 + objectAlignmentInBytes); 55 56 // create shared archive 57 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 58 "-XX:+UnlockDiagnosticVMOptions", 59 "-XX:SharedArchiveFile=./sample.jsa", 60 "-Xshare:dump", 61 objectAlignmentArg); 62 63 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 64 output.shouldContain("Loading classes to share"); 65 output.shouldHaveExitValue(0); 66 67 68 // run using the shared archive 69 pb = ProcessTools.createJavaProcessBuilder( 70 "-XX:+UnlockDiagnosticVMOptions", 71 "-XX:SharedArchiveFile=./sample.jsa", 72 "-Xshare:on", 73 objectAlignmentArg, 74 "-version"); 75 76 output = new OutputAnalyzer(pb.start()); 77 78 try { 79 output.shouldContain("sharing"); 80 output.shouldHaveExitValue(0); 81 } catch (RuntimeException e) { 82 // CDS uses absolute addresses for performance. 83 // It will try to reserve memory at a specific address; 84 // there is a chance such reservation will fail 85 // If it does, it is NOT considered a failure of the feature, 86 // rather a possible expected outcome, though not likely 87 output.shouldContain("Unable to use shared archive"); 88 output.shouldHaveExitValue(1); 89 } 90 } 91 }