145 lines
5.2 KiB
Java
145 lines
5.2 KiB
Java
/*******************************************************************************
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* Copyright (c) 2002 - 2006, 2011 IBM Corporation and others.
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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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* Adam Fuchs, Avik Chaudhur, Steve Suh - Modified ShrikeIRFactory to work with Dalvik
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*******************************************************************************/
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package com.ibm.wala.dalvik.classLoader;
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import com.ibm.wala.cfg.ControlFlowGraph;
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import com.ibm.wala.classLoader.IMethod;
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import com.ibm.wala.dalvik.ssa.DexSSABuilder;
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import com.ibm.wala.ipa.callgraph.Context;
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import com.ibm.wala.shrikeCT.InvalidClassFileException;
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import com.ibm.wala.ssa.DefaultIRFactory;
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import com.ibm.wala.ssa.IR;
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import com.ibm.wala.ssa.SSACFG;
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import com.ibm.wala.ssa.SSAInstruction;
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import com.ibm.wala.ssa.SSAOptions;
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import com.ibm.wala.ssa.ShrikeIndirectionData;
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import com.ibm.wala.ssa.SymbolTable;
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import com.ibm.wala.ssa.analysis.DeadAssignmentElimination;
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public class DexIRFactory extends DefaultIRFactory {
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public final static boolean buildLocalMap = false;
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@SuppressWarnings("rawtypes")
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@Override
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public ControlFlowGraph makeCFG(IMethod method, Context C) throws IllegalArgumentException {
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if (method == null) {
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throw new IllegalArgumentException("null method");
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}
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if (method instanceof DexIMethod)
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return new DexCFG((DexIMethod)method, C);
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return super.makeCFG(method,C);
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}
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@Override
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public IR makeIR(IMethod _method, Context C, final SSAOptions options) throws IllegalArgumentException {
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if (_method == null) {
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throw new IllegalArgumentException("null method");
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}
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if (!(_method instanceof DexIMethod))
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return super.makeIR(_method, C, options);
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final DexIMethod method = (DexIMethod)_method;
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// com.ibm.wala.shrikeBT.IInstruction[] instructions = null;
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// try {
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// instructions = method.getInstructions();
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// } catch (InvalidClassFileException e) {
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// e.printStackTrace();
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// Assertions.UNREACHABLE();
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// }
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final DexCFG cfg = (DexCFG)makeCFG(method, C);
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// calculate the SSA registers from the given cfg
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//TODO: check this
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final SymbolTable symbolTable = new SymbolTable(method.getNumberOfParameters());
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// final SymbolTable symbolTable = new SymbolTable(method.getNumberOfParameterRegisters());
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final SSAInstruction[] newInstrs = new SSAInstruction[method.getDexInstructions().length];
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final SSACFG newCfg = new SSACFG(method, cfg, newInstrs);
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return new IR(method, newInstrs, symbolTable, newCfg, options) {
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private final SSA2LocalMap localMap;
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private final ShrikeIndirectionData indirectionData;
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/**
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* Remove any phis that are dead assignments.
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*
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* TODO: move this elsewhere?
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*/
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private void eliminateDeadPhis() {
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DeadAssignmentElimination.perform(this);
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}
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@Override
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protected String instructionPosition(int instructionIndex) {
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try {
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int bcIndex = method.getBytecodeIndex(instructionIndex);
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int lineNumber = method.getLineNumber(bcIndex);
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if (lineNumber == -1) {
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return "";
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} else {
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return "(line " + lineNumber + ")";
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}
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} catch (InvalidClassFileException e) {
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return "";
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}
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}
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@Override
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public SSA2LocalMap getLocalMap() {
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return localMap;
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}
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{
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DexSSABuilder builder = DexSSABuilder.make(method, newCfg, cfg, newInstrs, symbolTable, buildLocalMap, options.getPiNodePolicy());
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builder.build();
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if (buildLocalMap)
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localMap = builder.getLocalMap();
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else
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localMap = null;
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indirectionData = builder.getIndirectionData();
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eliminateDeadPhis();
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setupLocationMap();
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//System.out.println("Successfully built a Dex IR!");
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//for(SSAInstruction ssaInst:newInstrs)
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//{
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// System.out.println("\t"+ssaInst);
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//}
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}
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@SuppressWarnings("unchecked")
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@Override
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protected ShrikeIndirectionData getIndirectionData() {
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return indirectionData;
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}
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};
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}
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@Override
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public boolean contextIsIrrelevant(IMethod method) {
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if (method == null) {
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throw new IllegalArgumentException("null method");
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}
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if (method instanceof DexIMethod)
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return true;
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return super.contextIsIrrelevant(method);
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}
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}
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