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