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 import java.net.URI; 26 import java.nio.file.DirectoryStream; 27 import java.nio.file.Files; 28 import java.nio.file.FileSystem; 29 import java.nio.file.FileSystems; 30 import java.nio.file.Path; 31 import java.util.ArrayList; 32 import java.util.regex.Matcher; 33 import java.util.regex.Pattern; 34 35 import jdk.test.lib.cds.CDSTestUtils; 36 import jdk.test.lib.cds.CDSOptions; 37 import jdk.test.lib.process.OutputAnalyzer; 38 39 /* 40 * @test 41 * @summary Try to archive lots of classes by searching for classes from the jrt:/ file system. With JDK 12 42 * this will produce an archive with over 30,000 classes. 43 * @requires vm.cds 44 * @library /test/lib 45 * @run driver LotsOfClasses 46 */ 47 48 public class LotsOfClasses { 49 static Pattern pattern; 50 51 public static void main(String[] args) throws Throwable { 52 ArrayList<String> list = new ArrayList<>(); 53 findAllClasses(list); 54 55 CDSOptions opts = new CDSOptions(); 56 opts.setClassList(list); 57 opts.addSuffix("--add-modules"); 58 opts.addSuffix("ALL-SYSTEM"); 59 opts.addSuffix("-Xlog:hashtables"); 60 61 OutputAnalyzer out = CDSTestUtils.createArchive(opts); 62 CDSTestUtils.checkDump(out); 63 } 64 65 static void findAllClasses(ArrayList<String> list) throws Throwable { 66 // Find all the classes in the jrt file system 67 pattern = Pattern.compile("/modules/[a-z.]*[a-z]+/([^-]*)[.]class"); 68 FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/")); 69 Path base = fs.getPath("/modules/"); 70 find(base, list); 71 } 72 73 static void find(Path p, ArrayList<String> list) throws Throwable { 74 try (DirectoryStream<Path> stream = Files.newDirectoryStream(p)) { 75 for (Path entry: stream) { 76 Matcher matcher = pattern.matcher(entry.toString()); 77 if (matcher.find()) { 78 String className = matcher.group(1); 79 list.add(className); 80 //System.out.println(className); 81 } 82 try { 83 find(entry, list); 84 } catch (Throwable t) {} 85 } 86 } 87 } 88 }