00001 package gov.nasa.arc.ase.jpf.jvm.bytecode;
00002
00003 import de.fub.bytecode.classfile.ConstantPool;
00004 import gov.nasa.arc.ase.jpf.jvm.SystemState;
00005 import gov.nasa.arc.ase.jpf.jvm.KernelState;
00006 import gov.nasa.arc.ase.jpf.jvm.ThreadInfo;
00007 import gov.nasa.arc.ase.util.Debug;
00008
00009 public class INSTANCEOF extends Instruction {
00010 private String type;
00011
00012 public Instruction execute(SystemState ss, KernelState ks, ThreadInfo th) {
00013 int objref = th.pop();
00014
00015 if(objref == -1)
00016 th.push(1, false);
00017 else if(ks.da.get(objref).instanceOf(type))
00018 th.push(1, false);
00019 else
00020 th.push(0, false);
00021
00022 return th.getPC().getNext();
00023 }
00024 public void setPeer(de.fub.bytecode.generic.Instruction i, ConstantPool cp) {
00025 type = cp.constantToString(cp.getConstant(((de.fub.bytecode.generic.INSTANCEOF)i).getIndex())).replace('.', '/');
00026 if(!type.startsWith("[")) type = "L" + type + ";";
00027 }
00028 }
