ACONST_NULL.java Source File

00001 package gov.nasa.arc.ase.jpf.jvm.bytecode;
00002 
00003 import de.fub.bytecode.generic.InstructionHandle;
00004 import gov.nasa.arc.ase.jpf.*;
00005 import gov.nasa.arc.ase.jpf.jvm.*;
00006 import gov.nasa.arc.ase.util.Debug;
00007 
00008 public class ACONST_NULL extends AbstractInstruction {
00009   private de.fub.bytecode.generic.ACONST_NULL peer;
00010 
00011   public InstructionHandle execute(SystemState ss, KernelState ks, ThreadInfo th) {
00012     // pushes a null onto the stack
00013     th.push(-1);
00014 // ifdef MARK_N_SWEEP
00015     th.setOperandRef();
00016 //#endif MARK_N_SWEEP
00017 
00018     return th.getPC().getNext();
00019   }  
00020   public void setPeer(de.fub.bytecode.generic.Instruction i) {
00021     peer = (de.fub.bytecode.generic.ACONST_NULL)i;
00022   }  
00023 }