1 /* 2 * Copyright (c) 2015, 2016, 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 8046246 27 * @summary Tests and benchmarks the JVMTI RedefineClasses when a 28 * single class (and its parent) contains many methods. 29 * 30 * @modules jdk.compiler 31 * java.instrument 32 * jdk.zipfs 33 * @run build ManyMethodsBenchmarkApp ManyMethodsBenchmarkAgent 34 * @run shell MakeJAR3.sh ManyMethodsBenchmarkAgent 'Can-Retransform-Classes: true' 35 * @run main/othervm -javaagent:ManyMethodsBenchmarkAgent.jar ManyMethodsBenchmarkApp 36 */ 37 import java.lang.instrument.*; 38 39 public class ManyMethodsBenchmarkAgent 40 { 41 public static boolean fail = false; 42 public static boolean completed = false; 43 private static Instrumentation instrumentation; 44 45 public static void 46 premain( String agentArgs, 47 Instrumentation instrumentation) { 48 System.out.println("ManyMethodsBenchmarkAgent started"); 49 ManyMethodsBenchmarkAgent.instrumentation = instrumentation; 50 System.out.println("ManyMethodsBenchmarkAgent finished"); 51 } 52 53 static void instr() { 54 System.out.println("ManyMethodsBenchmarkAgent.instr started"); 55 56 Class[] allClasses = instrumentation.getAllLoadedClasses(); 57 58 for (int i = 0; i < allClasses.length; i++) { 59 Class klass = allClasses[i]; 60 String name = klass.getName(); 61 if (!name.equals("Base")) { 62 continue; 63 } 64 System.err.println("Instrumenting the class: " + klass); 65 66 try { 67 instrumentation.retransformClasses(klass); 68 } catch (Throwable e) { 69 System.err.println("Error: bad return from retransform: " + klass); 70 System.err.println(" ERROR: " + e); 71 fail = true; 72 } 73 } 74 completed = true; 75 System.out.println("ManyMethodsBenchmarkAgent.instr finished"); 76 } 77 78 }