1 /* 2 * Copyright (c) 2016, 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 25 package gc.stress.gcbasher; 26 27 import java.io.IOException; 28 import java.net.URI; 29 import java.nio.file.FileSystems; 30 import java.nio.file.FileSystem; 31 import java.nio.file.Files; 32 import java.nio.file.Path; 33 import java.util.HashMap; 34 import java.util.stream.Stream; 35 36 public class TestGCBasher { 37 private static void parseClassFiles() throws IOException { 38 HashMap<String, ClassInfo> deps = new HashMap<>(); 39 40 FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/")); 41 Stream<Path> s = Files.walk(fs.getPath("/")); 42 for (Path p : (Iterable<Path>)s::iterator) { 43 if (p.toString().endsWith(".class") && 44 !p.getFileName().toString().equals("module-info.class")) { 45 byte[] data = Files.readAllBytes(p); 46 Decompiler d = new Decompiler(data); 47 ClassInfo ci = d.getClassInfo(); 48 deps.put(ci.getName(), ci); 49 } 50 } 51 } 52 53 public static void main(String[] args) throws IOException { 54 if (args.length != 1) { 55 System.err.println("Usage: TestGCBasher <duration-ms>"); 56 return; 57 } 58 59 long durationMillis = Long.valueOf(args[0]); 60 long start = System.currentTimeMillis(); 61 while (System.currentTimeMillis() - start < durationMillis) { 62 parseClassFiles(); 63 } 64 } 65 }