soot.dexpler.instructions.CmpInstruction 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.ThreeRegisterInstruction;
import org.jf.dexlib2.iface.instruction.formats.Instruction23x;
import soot.DoubleType;
import soot.FloatType;
import soot.IntType;
import soot.Local;
import soot.LongType;
import soot.Type;
import soot.dexpler.DexBody;
import soot.dexpler.IDalvikTyper;
import soot.dexpler.tags.DoubleOpTag;
import soot.dexpler.tags.FloatOpTag;
import soot.dexpler.tags.LongOpTag;
import soot.dexpler.typing.DalvikTyper;
import soot.jimple.AssignStmt;
import soot.jimple.BinopExpr;
import soot.jimple.Expr;
import soot.jimple.Jimple;
import soot.jimple.internal.JAssignStmt;
public class CmpInstruction extends TaggedInstruction {
public CmpInstruction(Instruction instruction, int codeAdress) {
super(instruction, codeAdress);
}
@Override
public void jimplify(DexBody body) {
if (!(instruction instanceof Instruction23x)) {
throw new IllegalArgumentException("Expected Instruction23x but got: " + instruction.getClass());
}
Instruction23x cmpInstr = (Instruction23x) instruction;
int dest = cmpInstr.getRegisterA();
Local first = body.getRegisterLocal(cmpInstr.getRegisterB());
Local second = body.getRegisterLocal(cmpInstr.getRegisterC());
// Expr cmpExpr;
// Type type = null
Opcode opcode = instruction.getOpcode();
Expr cmpExpr = null;
Type type = null;
switch (opcode) {
case CMPL_DOUBLE:
setTag(new DoubleOpTag());
type = DoubleType.v();
cmpExpr = Jimple.v().newCmplExpr(first, second);
break;
case CMPL_FLOAT:
setTag(new FloatOpTag());
type = FloatType.v();
cmpExpr = Jimple.v().newCmplExpr(first, second);
break;
case CMPG_DOUBLE:
setTag(new DoubleOpTag());
type = DoubleType.v();
cmpExpr = Jimple.v().newCmpgExpr(first, second);
break;
case CMPG_FLOAT:
setTag(new FloatOpTag());
type = FloatType.v();
cmpExpr = Jimple.v().newCmpgExpr(first, second);
break;
case CMP_LONG:
setTag(new LongOpTag());
type = LongType.v();
cmpExpr = Jimple.v().newCmpExpr(first, second);
break;
default:
throw new RuntimeException("no opcode for CMP: " + opcode);
}
AssignStmt assign = Jimple.v().newAssignStmt(body.getRegisterLocal(dest), cmpExpr);
assign.addTag(getTag());
setUnit(assign);
addTags(assign);
body.add(assign);
if (IDalvikTyper.ENABLE_DVKTYPER) {
getTag().getName();
BinopExpr bexpr = (BinopExpr) cmpExpr;
DalvikTyper.v().setType(bexpr.getOp1Box(), type, true);
DalvikTyper.v().setType(bexpr.getOp2Box(), type, true);
DalvikTyper.v().setType(((JAssignStmt) assign).leftBox, IntType.v(), false);
}
}
@Override
boolean overridesRegister(int register) {
ThreeRegisterInstruction i = (ThreeRegisterInstruction) instruction;
int dest = i.getRegisterA();
return register == dest;
}
}