1/* 2 * Copyright (c) 2013, 2017, 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 26 * @bug 7194897 27 * @summary JSR 292: Cannot create more than 16 instances of an anonymous class 28 * @modules java.base/jdk.internal.misc 29 * java.management 30 * @library /test/lib 31 * @author Robert Field 32 * @compile -XDignore.symbol.file ManyNewInstanceAnonTest.java 33 * @run main ClassFileInstaller ManyNewInstanceAnonTest 34 * @run main/othervm -Xbootclasspath/a:. -Xverify:all ManyNewInstanceAnonTest 35 * @run main/othervm -Xbootclasspath/a:. -Xverify:all -Dsun.reflection.noInflation=true ManyNewInstanceAnonTest 36 */ 37import java.io.ByteArrayOutputStream; 38import java.io.InputStream; 39import jdk.internal.misc.Unsafe; 40 41public class ManyNewInstanceAnonTest { 42 43 static final int REPS = 20; 44 static final Class<?> klass = ManyNewInstanceAnonTest.class; 45 46 public static void main(String[] args) throws Exception { 47 Class<?> c = Unsafe.getUnsafe().defineAnonymousClass(klass, readClassFile(), null); 48 for (int i = 0; i < REPS; ++i) { 49 System.out.printf("%d: %s\n", i, c.newInstance()); 50 } 51 System.out.println("Passed."); 52 } 53 54 private static byte[] readClassFile() throws Exception { 55 try (InputStream in = klass.getResourceAsStream(klass.getSimpleName() + ".class"); 56 ByteArrayOutputStream out = new ByteArrayOutputStream()) 57 { 58 int b; 59 while ((b = in.read()) != -1) { 60 out.write(b); 61 } 62 return out.toByteArray(); 63 } 64 } 65} 66