1 /* 2 * Copyright (c) 2019, 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 import sun.hotspot.WhiteBox; 25 26 /** 27 * This is a generic test app for testing if classes are loaded from the CDS archive 28 * or not (without having to parse -Xlog:class+load, or writing your own WhiteBox apps). 29 * Usage: 30 * [1] Create an archive with WhiteBox enabled. 31 * [2] Run this app with arguments such as 32 * "assertShared:java.lang.Object" 33 * "assertNotShared:NotSharedClassName" 34 * 35 * We can probably add other kinds of simple tests as well .... 36 * 37 * FIXME: enhance WB API to check if a particular archive has failed. So you can say 38 * assertShared:0,java.lang.Object 39 * to assert that java.lang.Object is shared from archive #0 (i.e., base archive). 40 */ 41 public class GenericTestApp { 42 private static final WhiteBox wb = WhiteBox.getWhiteBox(); 43 44 public static void main(String args[]) throws Exception { 45 System.out.println("GenericTestApp started. WhiteBox = " + wb); 46 System.out.println("cdsMemoryMappingFailed() = " + cdsMemoryMappingFailed()); 47 48 for (String s : args) { 49 Class c; 50 if ((c = getClass(s, "assertShared:")) != null) { 51 assertShared(c); 52 } 53 else if ((c = getClass(s, "assertNotShared:")) != null) { 54 assertNotShared(c); 55 } 56 else { 57 throw new RuntimeException("Unknown option: " + s); 58 } 59 System.out.println("passed: " + s); 60 } 61 } 62 63 private static Class getClass(String s, String prefix) throws Exception { 64 if (s.startsWith(prefix)) { 65 return Class.forName(s.substring(prefix.length())); 66 } else { 67 return null; 68 } 69 } 70 71 private static boolean cdsMemoryMappingFailed() { 72 return wb.cdsMemoryMappingFailed(); 73 } 74 75 private static void assertShared(Class klass) { 76 if (!cdsMemoryMappingFailed()) { 77 if (!wb.isSharedClass(klass)) { 78 throw new RuntimeException("Class should be shared but is not: " + klass); 79 } 80 } else { 81 // FIXME -- need to throw jtreg.SkippedException 82 System.out.println("Cannot test for wb.isSharedClass(" + klass + ") because CDS mapping has failed"); 83 } 84 } 85 86 private static void assertNotShared(Class klass) { 87 if (wb.isSharedClass(klass)) { 88 throw new RuntimeException("Class should be shared but is not: " + klass); 89 } 90 } 91 }