| /* |
| * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 6274264 6274241 5070281 |
| * @summary test retransformClasses |
| * @author Robert Field, Sun Microsystems |
| * |
| * @modules java.base/jdk.internal.org.objectweb.asm |
| * java.instrument |
| * @run shell/timeout=240 MakeJAR2.sh RetransformAgent RetransformApp 'Can-Retransform-Classes: true' |
| * @run main/othervm -javaagent:RetransformAgent.jar RetransformApp |
| */ |
| |
| import java.lang.instrument.*; |
| import java.lang.reflect.Module; |
| import java.security.ProtectionDomain; |
| import java.io.*; |
| import asmlib.*; |
| |
| class RetransformAgent { |
| |
| static ClassFileTransformer t1, t2, t3, t4; |
| static Instrumentation inst; |
| static boolean succeeded = true; |
| static int markCount = 0; |
| static int[] markGolden = {30, 40, 20, 30, 40, 20, 30, 40, 20, 30, 40, 20, |
| 11, 40, 20, 11, 40, 20, 11, 40, 20, 11, 40, 20}; |
| |
| static class Tr implements ClassFileTransformer { |
| final String trname; |
| final boolean onLoad; |
| final int loadIndex; |
| final boolean onRedef; |
| final int redefIndex; |
| final String cname; |
| final String nname; |
| |
| Tr(String trname, boolean onLoad, int loadIndex, boolean onRedef, int redefIndex, |
| String cname, String nname) { |
| this.trname = trname; |
| this.onLoad = onLoad; |
| this.loadIndex = loadIndex; |
| this.onRedef = onRedef; |
| this.redefIndex = redefIndex; |
| this.cname = cname; |
| this.nname = nname; |
| } |
| |
| public byte[] transform(Module module, |
| String className, |
| Class<?> classBeingRedefined, |
| ProtectionDomain protectionDomain, |
| byte[] classfileBuffer) { |
| boolean redef = classBeingRedefined != null; |
| |
| // System.err.println("hook " + trname + ": " + className + |
| // (redef? " REDEF" : " LOAD")); |
| if ((redef? onRedef : onLoad) && className != null && className.equals(cname)) { |
| int fixedIndex = redef ? redefIndex : loadIndex; |
| try { |
| byte[] newcf = Instrumentor.instrFor(classfileBuffer) |
| .addMethodEntryInjection( |
| nname, |
| (h)->{ |
| h.push(fixedIndex); |
| h.invokeStatic("RetransformAgent", "callTracker", "(I)V", false); |
| }) |
| .apply(); |
| /*** debugging ... |
| if (newcf != null) { |
| String fname = trname + (redef?"_redef" : "") + "/" + className; |
| System.err.println("dumping to: " + fname); |
| write_buffer(fname + "_before.class", classfileBuffer); |
| write_buffer(fname + "_instr.class", newcf); |
| } |
| ***/ |
| System.err.println(trname + ": " + className + " index: " + fixedIndex + |
| (redef? " REDEF" : " LOAD") + |
| " len before: " + classfileBuffer.length + |
| " after: " + newcf.length); |
| return newcf; |
| } catch (Throwable ex) { |
| System.err.println("Injection failure: " + ex); |
| ex.printStackTrace(); |
| } |
| } |
| return null; |
| } |
| } |
| |
| static void write_buffer(String fname, byte[]buffer) { |
| try { |
| File f = new File(fname); |
| if (!f.getParentFile().exists()) { |
| f.getParentFile().mkdirs(); |
| } |
| try (FileOutputStream outStream = new FileOutputStream(f)) { |
| outStream.write(buffer, 0, buffer.length); |
| } |
| } catch (IOException ex) { |
| System.err.println("EXCEPTION in write_buffer: " + ex); |
| } |
| } |
| |
| public static void premain (String agentArgs, Instrumentation instArg) { |
| inst = instArg; |
| System.err.println("Premain"); |
| |
| t1 = new Tr("TR1", false, 10, true, 11, "RetransformApp", "foo"); |
| inst.addTransformer(t1, true); |
| t2 = new Tr("TN2", true, 20, true, 21, "RetransformApp", "foo"); |
| inst.addTransformer(t2, false); |
| t3 = new Tr("TR3", true, 30, true, 31, "RetransformApp", "foo"); |
| inst.addTransformer(t3, true); |
| t4 = new Tr("TN4", true, 40, true, 41, "RetransformApp", "foo"); |
| inst.addTransformer(t4, false); |
| } |
| |
| public static void undo() { |
| inst.removeTransformer(t3); |
| try { |
| System.err.println("RETRANSFORM"); |
| inst.retransformClasses(new RetransformApp().getClass()); |
| } catch (Exception ex) { |
| System.err.println("EXCEPTION on undo: " + ex); |
| } |
| } |
| |
| public static boolean succeeded() { |
| return succeeded && markCount == markGolden.length; |
| } |
| |
| public static void callTracker(int mark) { |
| System.err.println("got mark " + mark); |
| if (markCount >= markGolden.length || mark != markGolden[markCount++]) { |
| succeeded = false; |
| } |
| } |
| } |