soot.dexpler.instructions.NewArrayInstruction 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.ReferenceInstruction;
import org.jf.dexlib2.iface.instruction.TwoRegisterInstruction;
import org.jf.dexlib2.iface.instruction.formats.Instruction22c;
import org.jf.dexlib2.iface.reference.TypeReference;
import soot.ArrayType;
import soot.IntType;
import soot.Local;
import soot.Type;
import soot.Value;
import soot.dexpler.DexBody;
import soot.dexpler.DexType;
import soot.dexpler.IDalvikTyper;
import soot.dexpler.typing.DalvikTyper;
import soot.jimple.AssignStmt;
import soot.jimple.Jimple;
import soot.jimple.NewArrayExpr;
public class NewArrayInstruction extends DexlibAbstractInstruction {
public NewArrayInstruction(Instruction instruction, int codeAdress) {
super(instruction, codeAdress);
}
@Override
public void jimplify(DexBody body) {
if (!(instruction instanceof Instruction22c)) {
throw new IllegalArgumentException("Expected Instruction22c but got: " + instruction.getClass());
}
Instruction22c newArray = (Instruction22c) instruction;
int dest = newArray.getRegisterA();
Value size = body.getRegisterLocal(newArray.getRegisterB());
Type t = DexType.toSoot((TypeReference) newArray.getReference());
// NewArrayExpr needs the ElementType as it increases the array dimension by 1
Type arrayType = ((ArrayType) t).getElementType();
NewArrayExpr newArrayExpr = Jimple.v().newNewArrayExpr(arrayType, size);
Local l = body.getRegisterLocal(dest);
AssignStmt assign = Jimple.v().newAssignStmt(l, newArrayExpr);
setUnit(assign);
addTags(assign);
body.add(assign);
if (IDalvikTyper.ENABLE_DVKTYPER) {
DalvikTyper.v().setType(newArrayExpr.getSizeBox(), IntType.v(), true);
DalvikTyper.v().setType(assign.getLeftOpBox(), newArrayExpr.getType(), false);
}
}
@Override
boolean overridesRegister(int register) {
TwoRegisterInstruction i = (TwoRegisterInstruction) 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;
}
}