soot.dexpler.instructions.AgetInstruction 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 org.jf.dexlib2.Opcode;
import org.jf.dexlib2.iface.instruction.Instruction;
import org.jf.dexlib2.iface.instruction.OneRegisterInstruction;
import org.jf.dexlib2.iface.instruction.formats.Instruction23x;
import soot.IntType;
import soot.Local;
import soot.dexpler.DexBody;
import soot.dexpler.IDalvikTyper;
import soot.dexpler.InvalidDalvikBytecodeException;
import soot.dexpler.tags.ObjectOpTag;
import soot.dexpler.typing.DalvikTyper;
import soot.jimple.ArrayRef;
import soot.jimple.AssignStmt;
import soot.jimple.Jimple;
public class AgetInstruction extends DexlibAbstractInstruction {
public AgetInstruction(Instruction instruction, int codeAdress) {
super(instruction, codeAdress);
}
@Override
public void jimplify(DexBody body) throws InvalidDalvikBytecodeException {
if (!(instruction instanceof Instruction23x)) {
throw new IllegalArgumentException("Expected Instruction23x but got: " + instruction.getClass());
}
Instruction23x aGetInstr = (Instruction23x) instruction;
int dest = aGetInstr.getRegisterA();
Local arrayBase = body.getRegisterLocal(aGetInstr.getRegisterB());
Local index = body.getRegisterLocal(aGetInstr.getRegisterC());
ArrayRef arrayRef = Jimple.v().newArrayRef(arrayBase, index);
Local l = body.getRegisterLocal(dest);
AssignStmt assign = Jimple.v().newAssignStmt(l, arrayRef);
if (aGetInstr.getOpcode() == Opcode.AGET_OBJECT) {
assign.addTag(new ObjectOpTag());
}
setUnit(assign);
addTags(assign);
body.add(assign);
if (IDalvikTyper.ENABLE_DVKTYPER) {
DalvikTyper.v().addConstraint(assign.getLeftOpBox(), assign.getRightOpBox());
DalvikTyper.v().setType(arrayRef.getIndexBox(), IntType.v(), true);
}
}
@Override
boolean overridesRegister(int register) {
OneRegisterInstruction i = (OneRegisterInstruction) instruction;
int dest = i.getRegisterA();
return register == dest;
}
}