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 * @build com.oracle.java.testlibrary.* 30 * @run main/othervm CdsSameObjectAlignment 31 */ 32 33 import com.oracle.java.testlibrary.*; 34 35 public class CdsSameObjectAlignment { 36 public static void main(String[] args) throws Exception { 37 String nativeWordSize = System.getProperty("sun.arch.data.model"); 38 if (!Platform.is64bit()) { 39 System.out.println("ObjectAlignmentInBytes for CDS is only " + 40 "supported on 64bit platforms; this plaform is " + 41 nativeWordSize); 42 System.out.println("Skipping the test"); 43 } else { 44 dumpAndLoadSharedArchive(8); 45 dumpAndLoadSharedArchive(16); 46 dumpAndLoadSharedArchive(32); 47 dumpAndLoadSharedArchive(64); 48 } 49 } 50 51 private static void 52 dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception { 53 String objectAlignmentArg = "-XX:ObjectAlignmentInBytes=" 54 + objectAlignmentInBytes; 55 System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = " 56 + objectAlignmentInBytes); 57 58 // create shared archive 59 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 60 "-XX:+UnlockDiagnosticVMOptions", 61 "-XX:SharedArchiveFile=./sample.jsa", 62 "-Xshare:dump", 63 objectAlignmentArg); 64 65 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 66 output.shouldContain("Loading classes to share"); 67 output.shouldHaveExitValue(0); 68 69 70 // run using the shared archive 71 pb = ProcessTools.createJavaProcessBuilder( 72 "-XX:+UnlockDiagnosticVMOptions", 73 "-XX:SharedArchiveFile=./sample.jsa", 74 "-Xshare:on", 75 objectAlignmentArg, 76 "-version"); 77 78 output = new OutputAnalyzer(pb.start()); 79 80 try { 81 output.shouldContain("sharing"); 82 output.shouldHaveExitValue(0); 83 } catch (RuntimeException e) { 84 // CDS uses absolute addresses for performance. 85 // It will try to reserve memory at a specific address; 86 // there is a chance such reservation will fail 87 // If it does, it is NOT considered a failure of the feature, 88 // rather a possible expected outcome, though not likely 89 output.shouldContain("Unable to use shared archive"); 90 output.shouldHaveExitValue(1); 91 } 92 } 93 }