1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/compiler/profiling/spectrapredefineclass/Agent.java Tue Apr 08 09:51:25 2014 +0200
1.3 @@ -0,0 +1,142 @@
1.4 +/*
1.5 + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +import java.security.*;
1.28 +import java.lang.instrument.*;
1.29 +import java.lang.reflect.*;
1.30 +import java.lang.management.ManagementFactory;
1.31 +import com.sun.tools.attach.VirtualMachine;
1.32 +
1.33 +class A {
1.34 + void m() {
1.35 + }
1.36 +}
1.37 +
1.38 +class B extends A {
1.39 + void m() {
1.40 + }
1.41 +}
1.42 +
1.43 +class C extends A {
1.44 + void m() {
1.45 + }
1.46 +}
1.47 +
1.48 +class Test {
1.49 +
1.50 + static public void m() throws Exception {
1.51 + for (int i = 0; i < 20000; i++) {
1.52 + m1(a);
1.53 + }
1.54 + for (int i = 0; i < 4; i++) {
1.55 + m1(b);
1.56 + }
1.57 + }
1.58 +
1.59 + static boolean m1(A a) {
1.60 + boolean res = Agent.m2(a);
1.61 + return res;
1.62 + }
1.63 +
1.64 + static public A a = new A();
1.65 + static public B b = new B();
1.66 + static public C c = new C();
1.67 +}
1.68 +
1.69 +public class Agent implements ClassFileTransformer {
1.70 +
1.71 +
1.72 + static class MemoryChunk {
1.73 + MemoryChunk other;
1.74 + long[] array;
1.75 + MemoryChunk(MemoryChunk other) {
1.76 + other = other;
1.77 + array = new long[1024 * 1024 * 1024];
1.78 + }
1.79 + }
1.80 +
1.81 + static public boolean m2(A a) {
1.82 + boolean res = false;
1.83 + if (a.getClass() == B.class) {
1.84 + a.m();
1.85 + } else {
1.86 + res = true;
1.87 + }
1.88 + return res;
1.89 + }
1.90 +
1.91 + static public void main(String[] args) throws Exception {
1.92 + // Create speculative trap entries
1.93 + Test.m();
1.94 +
1.95 + String nameOfRunningVM = ManagementFactory.getRuntimeMXBean().getName();
1.96 + int p = nameOfRunningVM.indexOf('@');
1.97 + String pid = nameOfRunningVM.substring(0, p);
1.98 +
1.99 + // Make the nmethod go away
1.100 + for (int i = 0; i < 10; i++) {
1.101 + System.gc();
1.102 + }
1.103 +
1.104 + // Redefine class
1.105 + try {
1.106 + VirtualMachine vm = VirtualMachine.attach(pid);
1.107 + vm.loadAgent(System.getProperty("test.classes",".") + "/agent.jar", "");
1.108 + vm.detach();
1.109 + } catch (Exception e) {
1.110 + throw new RuntimeException(e);
1.111 + }
1.112 +
1.113 + Test.m();
1.114 + // GC will hit dead method pointer
1.115 + for (int i = 0; i < 10; i++) {
1.116 + System.gc();
1.117 + }
1.118 + }
1.119 +
1.120 + public synchronized byte[] transform(final ClassLoader classLoader,
1.121 + final String className,
1.122 + Class<?> classBeingRedefined,
1.123 + ProtectionDomain protectionDomain,
1.124 + byte[] classfileBuffer) {
1.125 + System.out.println("Transforming class " + className);
1.126 + return classfileBuffer;
1.127 + }
1.128 +
1.129 + public static void redefine(String agentArgs, Instrumentation instrumentation, Class to_redefine) {
1.130 +
1.131 + try {
1.132 + instrumentation.retransformClasses(to_redefine);
1.133 + } catch (Exception e) {
1.134 + e.printStackTrace();
1.135 + }
1.136 +
1.137 + }
1.138 +
1.139 + public static void agentmain(String agentArgs, Instrumentation instrumentation) throws Exception {
1.140 + Agent transformer = new Agent();
1.141 + instrumentation.addTransformer(transformer, true);
1.142 +
1.143 + redefine(agentArgs, instrumentation, Test.class);
1.144 + }
1.145 +}
