1 /* 2 * Copyright (c) 2015, 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 java.net.URI; 25 import java.nio.file.FileSystem; 26 import java.nio.file.FileSystems; 27 import java.nio.file.Files; 28 import java.nio.file.Path; 29 import java.util.List; 30 import java.util.stream.Collectors; 31 import java.util.stream.Stream; 32 33 /* 34 * @test 35 * @summary Test to see if thread interrupt handling interferes with other threads. 36 * @run main/othervm -Djdk.image.map.all=false JImageOpenTest 37 */ 38 public class JImageOpenTest { 39 private static final int NTHREADS = 10; 40 41 public static void main(String[] args) throws Exception { 42 43 final FileSystem fs = FileSystems.getFileSystem(URI.create("jrt:/")); 44 final Path root = fs.getPath("/modules"); 45 46 final List<String> names = Files.walk(root) 47 .filter(p -> p.getNameCount() > 2) 48 .filter(p -> ModuleLayer.boot().findModule(p.getName(1).toString()).isPresent()) 49 .map(p -> p.subpath(2, p.getNameCount())) 50 .map(p -> p.toString()) 51 .filter(s -> s.endsWith(".class") && !s.endsWith("module-info.class")) 52 .collect(Collectors.toList()); 53 54 Runnable r = new Runnable() { 55 @Override 56 public void run() { 57 names.forEach(name -> { 58 String cn = name.substring(0, name.length() - 6).replace('/', '.'); 59 try { 60 Class.forName(cn, false, ClassLoader.getSystemClassLoader()); 61 } catch (Exception ex) { 62 System.err.println(Thread.currentThread() + " " + ex.getClass()); 63 } 64 }); 65 } 66 }; 67 68 Thread[] threads = new Thread[NTHREADS]; 69 70 for (int i = 0; i < NTHREADS; i++) { 71 Thread thread = new Thread(r); 72 threads[i] = thread; 73 thread.start(); 74 } 75 76 Thread.sleep(1); 77 78 for (int i = 0; i < NTHREADS; i++) { 79 Thread thread = threads[i]; 80 81 if (thread.isAlive()) { 82 thread.interrupt(); 83 break; 84 } 85 } 86 87 for (int i = 0; i < NTHREADS; i++) { 88 Thread thread = threads[i]; 89 thread.join(); 90 } 91 } 92 }