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 MONITORENTER extends Instruction {
00010 public Instruction execute(SystemState ss, KernelState ks, ThreadInfo th) {
00011 int objref = th.pop();
00012
00013 ks.da.get(objref).lock(th);
00014
00015 return th.getPC().getNext();
00016 }
00017 public boolean isExecutable(SystemState ss, KernelState ks, ThreadInfo th) {
00018 return ks.da.get(th.peek()).canLock(th);
00019 }
00020 public void setPeer(de.fub.bytecode.generic.Instruction i, ConstantPool cp) {
00021 }
00022 }
