1 /* 2 * Copyright (c) 2018, 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 Default CDS archive 26 * @summary Sharing should be enabled by default on supported platform/binaries. 27 * No -Xshare:dump is needed. No -Xshare:auto or -Xshare:on in needed. 28 * Verify a set of well-known shared classes. 29 * @requires vm.cds 30 * @library /test/lib 31 * @modules java.base/jdk.internal.misc 32 * java.management 33 * @build sun.hotspot.WhiteBox 34 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 35 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 36 * -XX:+WhiteBoxAPI CheckSharingWithDefaultArchive -showversion 37 */ 38 import jdk.test.lib.Platform; 39 import jtreg.SkippedException; 40 import sun.hotspot.WhiteBox; 41 42 public class CheckSharingWithDefaultArchive { 43 public static void main(String[] args) throws Exception { 44 if (!Platform.isDefaultCDSArchiveSupported()) { 45 throw new SkippedException("Supported platform"); 46 } 47 48 WhiteBox wb = WhiteBox.getWhiteBox(); 49 String classes[] = {"java.lang.Object", 50 "java.lang.String", 51 "java.lang.Class"}; 52 // If maping fails, sharing is disabled 53 if (wb.isSharingEnabled()) { 54 for (int i = 0; i < classes.length; i++) { 55 Class c = Class.forName(classes[i]); 56 if (wb.isSharedClass(c)) { 57 System.out.println(classes[i] + " is shared."); 58 } else { 59 throw new RuntimeException(classes[i] + " is not shared"); 60 } 61 } 62 } else { 63 throw new SkippedException("Sharing is not enabled."); 64 } 65 } 66 }