soot.dexpler.instructions.ConstClassInstruction Maven / Gradle / Ivy
package soot.dexpler.instructions;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 2012 Michael Markert, Frank Hartmann
*
* (c) 2012 University of Luxembourg - Interdisciplinary Centre for
* Security Reliability and Trust (SnT) - All rights reserved
* Alexandre Bartel
*
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of the
* License, or (at your option) any later version.
*
* This program 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 Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
import java.util.HashSet;
import java.util.Set;
import org.jf.dexlib2.iface.instruction.Instruction;
import org.jf.dexlib2.iface.instruction.OneRegisterInstruction;
import org.jf.dexlib2.iface.instruction.ReferenceInstruction;
import org.jf.dexlib2.iface.instruction.formats.Instruction21c;
import org.jf.dexlib2.iface.reference.TypeReference;
import soot.Type;
import soot.dexpler.DexBody;
import soot.dexpler.DexType;
import soot.dexpler.IDalvikTyper;
import soot.dexpler.typing.DalvikTyper;
import soot.jimple.AssignStmt;
import soot.jimple.ClassConstant;
import soot.jimple.Constant;
import soot.jimple.Jimple;
public class ConstClassInstruction extends DexlibAbstractInstruction {
public ConstClassInstruction(Instruction instruction, int codeAdress) {
super(instruction, codeAdress);
}
@Override
public void jimplify(DexBody body) {
if (!(instruction instanceof Instruction21c)) {
throw new IllegalArgumentException("Expected Instruction21c but got: " + instruction.getClass());
}
ReferenceInstruction constClass = (ReferenceInstruction) this.instruction;
TypeReference tidi = (TypeReference) (constClass.getReference());
Constant cst = ClassConstant.v(tidi.getType());
int dest = ((OneRegisterInstruction) instruction).getRegisterA();
AssignStmt assign = Jimple.v().newAssignStmt(body.getRegisterLocal(dest), cst);
setUnit(assign);
addTags(assign);
body.add(assign);
if (IDalvikTyper.ENABLE_DVKTYPER) {
// DalvikTyper.v().captureAssign((JAssignStmt)assign, op); //TODO:
// classtype could be null!
DalvikTyper.v().setType(assign.getLeftOpBox(), cst.getType(), false);
}
}
@Override
boolean overridesRegister(int register) {
OneRegisterInstruction i = (OneRegisterInstruction) instruction;
int dest = i.getRegisterA();
return register == dest;
}
@Override
public Set introducedTypes() {
ReferenceInstruction i = (ReferenceInstruction) instruction;
Set types = new HashSet();
types.add(DexType.toSoot((TypeReference) i.getReference()));
return types;
}
}