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 * 34 * @run build ManyMethodsBenchmarkApp ManyMethodsBenchmarkAgent 35 * @run shell MakeJAR3.sh ManyMethodsBenchmarkAgent 'Can-Retransform-Classes: true' 36 * @run main/othervm -javaagent:ManyMethodsBenchmarkAgent.jar ManyMethodsBenchmarkApp 37 */ 38 import java.lang.instrument.*; 39 40 public class ManyMethodsBenchmarkAgent 41 { 42 public static boolean fail = false; 43 public static boolean completed = false; 44 private static Instrumentation instrumentation; 45 46 public static void 47 premain( String agentArgs, 48 Instrumentation instrumentation) { 49 System.out.println("ManyMethodsBenchmarkAgent started"); 50 ManyMethodsBenchmarkAgent.instrumentation = instrumentation; 51 System.out.println("ManyMethodsBenchmarkAgent finished"); 52 } 53 54 static void instr() { 55 System.out.println("ManyMethodsBenchmarkAgent.instr started"); 56 57 Class[] allClasses = instrumentation.getAllLoadedClasses(); 58 59 for (int i = 0; i < allClasses.length; i++) { 60 Class klass = allClasses[i]; 61 String name = klass.getName(); 62 if (!name.equals("Base")) { 63 continue; 64 } 65 System.err.println("Instrumenting the class: " + klass); 66 67 try { 68 instrumentation.retransformClasses(klass); 69 } catch (Throwable e) { 70 System.err.println("Error: bad return from retransform: " + klass); 71 System.err.println(" ERROR: " + e); 72 fail = true; 73 } 74 } 75 completed = true; 76 System.out.println("ManyMethodsBenchmarkAgent.instr finished"); 77 } 78 79 }