214 lines
7.8 KiB
Java
214 lines
7.8 KiB
Java
/*******************************************************************************
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* Copyright (c) 2002,2006 IBM Corporation.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package com.ibm.wala.shrike.bench;
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import java.io.BufferedWriter;
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import java.io.File;
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import java.io.FileWriter;
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import java.io.Writer;
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import java.util.Random;
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import com.ibm.wala.shrikeBT.ConditionalBranchInstruction;
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import com.ibm.wala.shrikeBT.ConstantInstruction;
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import com.ibm.wala.shrikeBT.Constants;
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import com.ibm.wala.shrikeBT.Disassembler;
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import com.ibm.wala.shrikeBT.DupInstruction;
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import com.ibm.wala.shrikeBT.IArrayStoreInstruction;
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import com.ibm.wala.shrikeBT.IGetInstruction;
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import com.ibm.wala.shrikeBT.IPutInstruction;
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import com.ibm.wala.shrikeBT.LoadInstruction;
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import com.ibm.wala.shrikeBT.MethodData;
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import com.ibm.wala.shrikeBT.MethodEditor;
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import com.ibm.wala.shrikeBT.MethodEditor.Output;
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import com.ibm.wala.shrikeBT.StoreInstruction;
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import com.ibm.wala.shrikeBT.SwapInstruction;
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import com.ibm.wala.shrikeBT.Util;
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import com.ibm.wala.shrikeBT.analysis.Verifier;
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import com.ibm.wala.shrikeBT.info.LocalAllocator;
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import com.ibm.wala.shrikeBT.shrikeCT.ClassInstrumenter;
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import com.ibm.wala.shrikeBT.shrikeCT.OfflineInstrumenter;
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import com.ibm.wala.shrikeCT.ClassWriter;
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/**
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* This is a demo class.
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*
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* Class files are taken as input arguments (or if there are none, from standard input). The methods in those files are
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* instrumented: we insert a System.err.println() at ever method call, and a System.err.println() at every method entry.
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*
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* In Unix, I run it like this: java -cp ~/dev/shrike/shrike com.ibm.wala.shrikeBT.shrikeCT.tools.Bench test.jar -o output.jar
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*
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* The instrumented classes are placed in the directory "output" under the current directory. Disassembled code is written to the
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* file "report" under the current directory.
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*/
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public class Mangler {
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private static OfflineInstrumenter instrumenter;
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private static final boolean verify = true;
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private static final boolean disasm = true;
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public static void main(String[] args) throws Exception {
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for (int i = 0; i < 1; i++) {
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instrumenter = new OfflineInstrumenter();
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Writer w = new BufferedWriter(new FileWriter("report", false));
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args = instrumenter.parseStandardArgs(args);
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int seed;
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try {
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seed = Integer.parseInt(args[0]);
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} catch (NumberFormatException ex) {
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System.err.println("Invalid number: " + args[0]);
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w.close();
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return;
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}
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Random r = new Random(seed);
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instrumenter.setPassUnmodifiedClasses(true);
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instrumenter.beginTraversal();
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instrumenter.setOutputJar(new File("output.jar"));
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ClassInstrumenter ci;
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while ((ci = instrumenter.nextClass()) != null) {
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doClass(ci, w, r);
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}
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instrumenter.close();
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}
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}
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private static void doClass(final ClassInstrumenter ci, Writer w, final Random r) throws Exception {
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final String className = ci.getReader().getName();
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w.write("Class: " + className + "\n");
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w.flush();
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for (int m = 0; m < ci.getReader().getMethodCount(); m++) {
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MethodData d = ci.visitMethod(m);
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// d could be null, e.g., if the method is abstract or native
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if (d != null) {
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w.write("Instrumenting " + ci.getReader().getMethodName(m) + " " + ci.getReader().getMethodType(m) + ":\n");
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w.flush();
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if (disasm) {
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w.write("Initial ShrikeBT code:\n");
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(new Disassembler(d)).disassembleTo(w);
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w.flush();
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}
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if (verify) {
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Verifier v = new Verifier(d);
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v.verify();
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}
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final int passes = r.nextInt(4) + 1;
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for (int i = 0; i < passes; i++) {
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final boolean doGet = true; // r.nextBoolean();
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final boolean doPut = true; // r.nextBoolean();
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final boolean doArrayStore = true; // r.nextBoolean();
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final int tmpInt = LocalAllocator.allocate(d, "I");
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final int tmpAny = LocalAllocator.allocate(d);
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final MethodEditor me = new MethodEditor(d);
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me.beginPass();
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me.visitInstructions(new MethodEditor.Visitor() {
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@Override
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public void visitGet(IGetInstruction instruction) {
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if (doGet && !instruction.isStatic()) {
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insertBefore(new MethodEditor.Patch() {
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@Override
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public void emitTo(Output w) {
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w.emit(DupInstruction.make(0));
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}
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});
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insertAfter(new MethodEditor.Patch() {
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@Override
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public void emitTo(Output w) {
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w.emit(SwapInstruction.make());
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w.emit(Util.makePut(Slots.class, "o"));
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}
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});
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}
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}
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@Override
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public void visitPut(IPutInstruction instruction) {
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if (doPut && !instruction.isStatic()) {
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insertBefore(new MethodEditor.Patch() {
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@Override
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public void emitTo(Output w) {
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w.emit(SwapInstruction.make());
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w.emit(DupInstruction.make(1));
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w.emit(SwapInstruction.make());
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}
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});
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insertAfter(new MethodEditor.Patch() {
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@Override
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public void emitTo(Output w) {
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w.emit(Util.makePut(Slots.class, "o"));
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}
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});
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}
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}
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@Override
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public void visitArrayStore(final IArrayStoreInstruction instruction) {
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if (doArrayStore) {
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final int label = me.allocateLabel();
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insertBefore(new MethodEditor.Patch() {
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@Override
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public void emitTo(Output w) {
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String t = Util.getStackType(instruction.getType());
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w.emit(StoreInstruction.make(t, tmpAny));
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w.emit(StoreInstruction.make(Constants.TYPE_int, tmpInt));
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w.emit(DupInstruction.make(0));
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w.emit(LoadInstruction.make(Constants.TYPE_int, tmpInt));
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w.emit(LoadInstruction.make(t, tmpAny));
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if (t.equals(Constants.TYPE_int)) {
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w.emit(DupInstruction.make(0));
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w.emit(ConstantInstruction.make(0));
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w.emit(ConditionalBranchInstruction.make(t, ConditionalBranchInstruction.Operator.EQ, label));
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w.emit(DupInstruction.make(0));
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w.emit(Util.makePut(Slots.class, "i"));
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w.emitLabel(label);
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}
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}
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});
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insertAfter(new MethodEditor.Patch() {
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@Override
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public void emitTo(Output w) {
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w.emit(Util.makePut(Slots.class, "o"));
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w.emit(LoadInstruction.make(Constants.TYPE_int, tmpInt));
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w.emit(Util.makePut(Slots.class, "i"));
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}
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});
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}
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}
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});
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// this updates the data d
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me.applyPatches();
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}
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if (disasm) {
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w.write("Final ShrikeBT code:\n");
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(new Disassembler(d)).disassembleTo(w);
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w.flush();
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}
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}
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}
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if (ci.isChanged()) {
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ClassWriter cw = ci.emitClass();
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instrumenter.outputModifiedClass(ci, cw);
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}
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}
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} |