Robust/src/Analysis/TaskStateAnalysis/TaskAnalysis.java

   1 package Analysis.TaskStateAnalysis;
   2 import Analysis.TaskStateAnalysis.*;
   3 import IR.*;
   4 import IR.Tree.*;
   5 import IR.Flat.*;
   6 import java.util.*;
   7 import java.io.File;
   8 import java.io.FileWriter;
   9
  10 public class TaskAnalysis {
  11     State state;
  12     Hashtable Adj_List;
  13     Hashtable flags;
  14     Hashtable extern_flags;
  15     Queue<TriggerState> q_main;
  16
  17     /**
  18      * Class Constructor
  19      *
  20      * @param state a flattened State object
  21      * @see State
  22      */
  23     public TaskAnalysis(State state)
  24     {
  25         this.state=state;
  26     }
  27
  28     /** This function returns the number of external flags, etc */
  29
  30     private void getFlagsfromClasses() {
  31         flags=new Hashtable();
  32         extern_flags = new Hashtable();
  33
  34         for(Iterator it_classes=state.getClassSymbolTable().getDescriptorsIterator();it_classes.hasNext();) {
  35
  36             ClassDescriptor cd = (ClassDescriptor)it_classes.next();
  37             System.out.println(cd.getSymbol());
  38             Vector vFlags=new Vector();
  39             FlagDescriptor flag[];
  40             int ctr=0;
  41
  42
  43             /* Adding the flags of the super class */
  44             if (cd.getSuper()!=null) {
  45                 ClassDescriptor superdesc=cd.getSuperDesc();
  46
  47                 for(Iterator it_cflags=superdesc.getFlags();it_cflags.hasNext();) {
  48                     FlagDescriptor fd = (FlagDescriptor)it_cflags.next();
  49                     System.out.println(fd.toString());
  50                     vFlags.add(fd);
  51                 }
  52             }
  53
  54             for(Iterator it_cflags=cd.getFlags();it_cflags.hasNext();) {
  55                 FlagDescriptor fd = (FlagDescriptor)it_cflags.next();
  56                 System.out.println(fd.toString());
  57                 vFlags.add(fd);
  58             }
  59
  60             if (vFlags.size()!=0) {
  61                 flag=new FlagDescriptor[vFlags.size()];
  62
  63                 for(int i=0;i < vFlags.size() ; i++) {
  64                     if (((FlagDescriptor)vFlags.get(i)).getExternal()) {
  65                         flag[ctr]=(FlagDescriptor)vFlags.get(i);
  66                         vFlags.remove(flag[ctr]);
  67                         ctr++;
  68                     }
  69                 }
  70                 for(int i=0;i < vFlags.size() ; i++) {
  71                     flag[i+ctr]=(FlagDescriptor)vFlags.get(i);
  72                 }
  73                 extern_flags.put(cd,new Integer(ctr));
  74                 flags.put(cd,flag);
  75
  76             }
  77         }
  78     }
  79
  80     public void taskAnalysis() throws java.io.IOException {
  81         Adj_List=new Hashtable();
  82
  83         getFlagsfromClasses();
  84
  85         int externs;
  86         q_main=new LinkedList<TriggerState>();
  87
  88         for(Iterator it_classes=(Iterator)flags.keys();it_classes.hasNext();) {
  89             ClassDescriptor cd=(ClassDescriptor)it_classes.next();
  90
  91             externs=((Integer)extern_flags.get(cd)).intValue();
  92
  93             FlagDescriptor[] fd=(FlagDescriptor[])flags.get(cd);
  94             //Debug block
  95             System.out.println("Inside taskAnalysis;\n Class:"+ cd.getSymbol());
  96             System.out.println("No of externs " + externs);
  97             System.out.println("No of flags: "+fd.length);
  98             //Debug block
  99             if (fd.length == externs) {
 100                 System.out.println("extern called");
 101                 boolean onlyExterns=true;
 102             } else {
 103                 if ((fd.length == 1)
 104                     && (fd[0].getSymbol().compareTo("initialstate")==0)) {
 105                     FlagState fstemp=new FlagState(fd, cd);
 106                     Hashtable Adj_List_temp=new Hashtable();
 107
 108                     fstemp.put(fd[0],new Boolean(true));
 109                     Vector vtemp=new Vector();
 110                     vtemp.add(new Edge(fstemp,"Runtime"));
 111                     Adj_List_temp.put(new FlagState(fd,cd),vtemp);
 112                     Adj_List.put(cd,Adj_List_temp);
 113
 114                     Queue<TriggerState> q_temp=analyseTasks(new TriggerState(cd,fstemp));
 115
 116
 117                     if ( q_temp != null) {
 118                         q_main.addAll(q_temp);
 119                     }
 120
 121                 }
 122             }
 123         }
 124         while (q_main.size() > 0) {
 125             // ****debug block********
 126
 127             System.out.println("/***********contents of main q**********/");
 128             for (Iterator it_qm=q_main.iterator();it_qm.hasNext();)
 129                 {
 130                     TriggerState ts_qm=(TriggerState)it_qm.next();
 131                     FlagState fs_qm=ts_qm.getState();
 132
 133                     System.out.println("FS : "+fs_qm.toString((FlagDescriptor [])flags.get(ts_qm.getClassDescriptor())));
 134                 }
 135             System.out.println("/*********************************/");
 136             // ****debug block********
 137             Queue<TriggerState> q_temp=analyseTasks(q_main.poll());
 138             if ( q_temp != null) {
 139                 q_main.addAll(q_temp);
 140             }
 141         }
 142
 143         //Creating DOT files
 144         Enumeration e=Adj_List.keys();
 145
 146         while (e.hasMoreElements()) {
 147             System.out.println("creating dot file");
 148             ClassDescriptor cdtemp=(ClassDescriptor)e.nextElement();
 149             System.out.println((cdtemp.getSymbol()));
 150             createDOTfile(cdtemp);
 151         }
 152
 153     }
 154
 155
 156     public Queue<TriggerState> analyseTasks(TriggerState ts) throws java.io.IOException {
 157         Queue<FlagState> q;
 158         Queue<FlagState> qft;
 159
 160         Hashtable Adj_List_temp;
 161         Queue<TriggerState> q_retval;
 162
 163         ClassDescriptor cd=ts.getClassDescriptor();
 164
 165         if (Adj_List.containsKey(cd)) {
 166             //Debug block
 167             System.out.println("Inside analyseTasks;\n Checking if adj_list contains the class desc:"+ cd.getSymbol());
 168             //Debug block
 169
 170             Adj_List_temp=(Hashtable)Adj_List.get(cd);
 171         } else {
 172             Adj_List_temp=new Hashtable();
 173             Adj_List.put(cd,Adj_List_temp);
 174         }
 175
 176
 177         int externs=((Integer)extern_flags.get(cd)).intValue();
 178         FlagDescriptor[] fd=(FlagDescriptor[])flags.get(cd);
 179
 180         q = new LinkedList<FlagState>();
 181         q_retval=new LinkedList<TriggerState>();
 182         q.offer(ts.getState());
 183
 184         //***Debug Block***
 185
 186         while (q.size() != 0) {
 187             System.out.println("inside while loop in analysetasks \n");
 188
 189             FlagState fsworking=q.poll();
 190
 191             //***Debug Block***
 192             FlagDescriptor[] ftemp=(FlagDescriptor[])flags.get(cd);
 193             System.out.println("Processing state: "+cd.getSymbol()+" " + fsworking.toString(ftemp));
 194             //***Debug Block***
 195
 196
 197             for(Iterator it_tasks=state.getTaskSymbolTable().getDescriptorsIterator();it_tasks.hasNext();) {
 198                 TaskDescriptor td = (TaskDescriptor)it_tasks.next();
 199                 boolean taskistriggered=false;
 200                 int ctr=0;
 201                 String taskname=getTaskName(td);
 202
 203
 204
 205                 //***Debug Block***
 206
 207                 System.out.println();
 208                 System.out.println("Method: AnalyseTasks");
 209                 System.out.println(taskname);
 210                 System.out.println();
 211
 212                 //***Debug Block***
 213
 214
 215                 for(int i=0; i < td.numParameters(); i++) {
 216                     FlagExpressionNode fen=td.getFlag(td.getParameter(i));
 217                     if (isTaskTrigger(fen,fsworking))
 218                         taskistriggered = true;
 219                 }
 220
 221                 if (taskistriggered) {
 222                     //***Debug Block***
 223                     //
 224                     System.out.println("inside taskistriggered");
 225
 226                     //***Debug Block***
 227                     if (wasFlagStateProcessed(Adj_List_temp,fsworking)) {
 228                         if (! (fd.length == externs))
 229                             continue;
 230                     } else
 231                         Adj_List_temp.put(fsworking,new Vector());
 232
 233                     FlatMethod fm = state.getMethodFlat(td);
 234                     FlatNode fn=fm.methodEntryNode();
 235
 236                     HashSet tovisit= new HashSet();
 237                     HashSet visited= new HashSet();
 238
 239                     tovisit.add(fn);
 240                     while(!tovisit.isEmpty()) {
 241                         FlatNode fn1 = (FlatNode)tovisit.iterator().next();
 242                         tovisit.remove(fn1);
 243                         visited.add(fn1);
 244                         for(int i = 0; i < fn1.numNext(); i++) {
 245                             FlatNode nn=fn1.getNext(i);
 246                             if (nn.kind()==13) {
 247                                 //***Debug Block***
 248                                 if (((FlatFlagActionNode)nn).getFFANType() == FlatFlagActionNode.PRE) {
 249                                     throw new Error("PRE FlagActions not supported");
 250                                 } else if (((FlatFlagActionNode)nn).getFFANType() == FlatFlagActionNode.NEWOBJECT) {
 251                                     //***Debug Block***
 252                                     System.out.println("NEWObject");
 253                                     //***Debug Block***
 254
 255
 256                                     TempDescriptor[] tdArray = ((FlatFlagActionNode)nn).readsTemps();
 257
 258                                     //Under the safe assumption that all the temps in FFAN.NewObject node are of the same type(class)
 259                                     ClassDescriptor cd_new=tdArray[0].getType().getClassDesc();
 260
 261                                     System.out.println("Class: "+cd_new.getSymbol());
 262
 263                                     FlagState fstemp=new FlagState((FlagDescriptor[])flags.get(cd_new), cd_new);
 264
 265                                     for(Iterator it_tfp=((FlatFlagActionNode)nn).getTempFlagPairs();it_tfp.hasNext();) {
 266                                         TempFlagPair tfp=(TempFlagPair)it_tfp.next();
 267                                         if (tfp.getFlag()==null) {
 268                                             System.out.println("test1");
 269                                             q_retval.addAll(createPossibleRuntimeStates(new TriggerState(cd_new,new FlagState((FlagDescriptor[])flags.get(cd_new), cd_new))));
 270                                             // ****debug block********
 271                                             System.out.println("/***********contents of q ret**********/");
 272                                             for (Iterator it_qret=q_retval.iterator();it_qret.hasNext();) {
 273                                                 TriggerState ts_qret=(TriggerState)it_qret.next();
 274                                                 FlagState fs_qret=ts_qret.getState();
 275
 276                                                 System.out.println("FS : "+fs_qret.toString((FlagDescriptor [])flags.get(ts_qret.getClassDescriptor())));
 277                                             }
 278                                             System.out.println("/*********************************/");
 279                                             // ****debug block********
 280                                         } else
 281                                             fstemp.put(tfp.getFlag(),new Boolean(((FlatFlagActionNode)nn).getFlagChange(tfp)));
 282
 283
 284                                     }
 285
 286                                     //***Debug Block***
 287                                     System.out.println("test2");
 288                                     System.out.println("Newobj fsworking "+fsworking.toString((FlagDescriptor [])flags.get(cd_new)));
 289                                     System.out.println("Newobj fstemp "+fstemp.toString((FlagDescriptor [])flags.get(cd_new)));
 290
 291                                     //***Debug Block***
 292
 293                                     q_retval.offer(new TriggerState(cd_new,fstemp));
 294
 295                                     //make this a function containsExterns()
 296                                     int extrns=((Integer)extern_flags.get(cd_new)).intValue();
 297
 298                                     if ((extrns >0) && (extrns!=((FlagDescriptor[])flags.get(cd_new)).length))
 299                                         q_retval.addAll(createPossibleRuntimeStates(new TriggerState(cd_new,fstemp)));
 300
 301                                     fstemp=null;
 302                                     // ****debug block********
 303                                     System.out.println("/***********contents of q ret 1**********/");
 304                                     for (Iterator it_qret=q_retval.iterator();it_qret.hasNext();) {
 305                                         TriggerState ts_qret=(TriggerState)it_qret.next();
 306                                         FlagState fs_qret=ts_qret.getState();
 307
 308                                         System.out.println("FS : "+fs_qret.toString((FlagDescriptor [])flags.get(ts_qret.getClassDescriptor())));
 309                                     }
 310                                     System.out.println("/*********************************/");
 311                                     // ****debug block********
 312
 313                                 }
 314                                 if (((FlatFlagActionNode)nn).getFFANType() == FlatFlagActionNode.TASKEXIT) {
 315                                     //***Debug Block***
 316                                     //
 317                                     System.out.println("TaskExit");
 318                                     //***Debug Block***
 319
 320                                     FlagState fstemp=new FlagState(fsworking.getStateTable(), null); //WHAT CLASS IS THIS
 321
 322                                     for(Iterator it_tfp=((FlatFlagActionNode)nn).getTempFlagPairs();it_tfp.hasNext();) {
 323                                         TempFlagPair tfp=(TempFlagPair)it_tfp.next();
 324                                         fstemp.put(tfp.getFlag(),new Boolean(((FlatFlagActionNode)nn).getFlagChange(tfp)));
 325                                     }
 326                                     //***Debug Block***
 327                                     System.out.println();
 328                                     System.out.println(fstemp.toString((FlagDescriptor [])flags.get(cd)));
 329                                     System.out.println();
 330                                     System.out.println("taskexit fsworking "+fsworking.toString((FlagDescriptor [])flags.get(cd)));
 331                                     System.out.println("taskexit fstemp "+fstemp.toString((FlagDescriptor [])flags.get(cd)));
 332
 333                                     //***Debug Block***
 334                                     if (!edgeexists(Adj_List_temp,fsworking,fstemp,taskname)) {
 335                                         ((Vector)Adj_List_temp.get(fsworking)).add(new Edge(fstemp,taskname));
 336                                     }
 337                                     if (!wasFlagStateProcessed(Adj_List_temp,fstemp)) {
 338                                         q.offer(fstemp);
 339                                     }
 340                                     fstemp=null;
 341
 342                                 }
 343                             }
 344
 345                             if (!visited.contains(nn) && !tovisit.contains(nn)) {
 346                                 tovisit.add(nn);
 347                             }
 348                         }
 349                     }
 350                 }
 351             }
 352         }
 353         if (q_retval.size()==0)
 354             return null;
 355         else
 356             return q_retval;
 357     }
 358
 359     private boolean isTaskTrigger(FlagExpressionNode fen,FlagState fs) {
 360         if (fen instanceof FlagNode)
 361             return fs.get(((FlagNode)fen).getFlag());
 362         else
 363             switch (((FlagOpNode)fen).getOp().getOp()) {
 364             case Operation.LOGIC_AND:
 365                 return ((isTaskTrigger(((FlagOpNode)fen).getLeft(),fs)) && (isTaskTrigger(((FlagOpNode)fen).getRight(),fs)));
 366             case Operation.LOGIC_OR:
 367                 return ((isTaskTrigger(((FlagOpNode)fen).getLeft(),fs)) || (isTaskTrigger(((FlagOpNode)fen).getRight(),fs)));
 368             case Operation.LOGIC_NOT:
 369                 return !(isTaskTrigger(((FlagOpNode)fen).getLeft(),fs));
 370             default:
 371                 return false;
 372             }
 373     }
 374
 375     private boolean wasFlagStateProcessed(Hashtable Adj_List,FlagState fs) {
 376         Enumeration e=Adj_List.keys();
 377
 378         while(e.hasMoreElements()) {
 379             FlagState fsv = (FlagState)(e.nextElement());
 380
 381             if (fsv.isEqual(fs))
 382                 return true;
 383         }
 384         return false;
 385     }
 386
 387     private boolean existsInQueue(TriggerState ts) {
 388         throw new Error("Use hashcode/contains of set method to find...no linear search allowed");
 389     }
 390
 391     private boolean existsInFSQueue(Queue q,FlagState fs) {
 392         throw new Error("Use hashcode/contains of set method to find...no linear search allowed");
 393     }
 394
 395     public void printAdjList(ClassDescriptor cd) {
 396         Enumeration e=((Hashtable)Adj_List.get(cd)).keys();
 397         while(e.hasMoreElements()) {
 398             FlagState fsv = (FlagState)(e.nextElement());
 399             System.out.println(fsv.toString((FlagDescriptor [])flags.get(cd)));
 400         }
 401     }
 402
 403     public void createDOTfile(ClassDescriptor cd) throws java.io.IOException {
 404         File dotfile= new File("graph"+cd.getSymbol()+".dot");
 405
 406         FileWriter dotwriter=new FileWriter(dotfile,true);
 407
 408         dotwriter.write("digraph G{ \n");
 409         dotwriter.write("center=true;\norientation=landscape;\n");
 410
 411         Enumeration e=((Hashtable)Adj_List.get(cd)).keys();
 412         while(e.hasMoreElements()) {
 413             FlagState fsv = (FlagState)(e.nextElement());
 414             System.out.println(fsv.toString());
 415             Hashtable test=(Hashtable)Adj_List.get(cd);
 416             Vector edges=(Vector)test.get(fsv);
 417             for(int i=0;i < edges.size();i++) {
 418                 dotwriter.write(fsv.toString((FlagDescriptor [])flags.get(cd))+" -> "+((Edge)edges.get(i)).getState().toString((FlagDescriptor [])flags.get(cd))+"[label=\""+((Edge)edges.get(i)).getName()+"\"];\n");
 419             }
 420
 421         }
 422         dotwriter.write("}\n");
 423         dotwriter.flush();
 424         dotwriter.close();
 425     }
 426
 427     private String getTaskName(TaskDescriptor td) {
 428         StringTokenizer st = new StringTokenizer(td.toString(),"(");
 429         return st.nextToken();
 430     }
 431
 432     private boolean edgeexists(Hashtable Adj_List_local,FlagState v1, FlagState v2,String name) {
 433         Vector edges=(Vector)Adj_List_local.get(v1);
 434
 435         if (edges == null) {
 436             System.out.println("no edges");
 437         } else {
 438             for(int i=0;i < edges.size();i++) {
 439                 FlagState fs=((Edge)edges.get(i)).getState();
 440                 if (fs.isEqual(v2) && (name.compareTo(((Edge)edges.get(i)).getName())==0))
 441                     return true;
 442             }
 443         }
 444         return false;
 445     }
 446
 447     private void processExterns(boolean onlyExterns,ClassDescriptor cd) throws java.io.IOException {
 448         int noOfIterations;
 449         Hashtable Adj_List_temp;
 450         if (Adj_List.containsKey(cd)) {
 451             Adj_List_temp=(Hashtable)Adj_List.get(cd);
 452         } else {
 453             Adj_List_temp=new Hashtable();
 454             Adj_List.put(cd,Adj_List_temp);
 455         }
 456
 457
 458         if (onlyExterns) {
 459             FlagDescriptor [] fd=(FlagDescriptor [])flags.get(cd);
 460             System.out.println("onlyExterns"+fd.length);
 461             noOfIterations=1<<fd.length;
 462             boolean BoolValTable[]=new boolean[fd.length];
 463
 464             for(int i=0; i < fd.length ; i++) {
 465                 System.out.println(fd[i].getSymbol());
 466                 BoolValTable[i]=false;
 467             }
 468             Adj_List_temp.put(new FlagState(fd,cd),new Vector());
 469
 470             for(int k=1; k<noOfIterations; k++) {
 471                 for(int j=0; j< fd.length ;j++) {
 472                     if ((k% (1<<j)) == 0)
 473                         BoolValTable[j]=(!BoolValTable[j]);
 474                 }
 475
 476                 FlagState fstemp=new FlagState(fd,cd);
 477                 int i=0;
 478                 for(Enumeration e=fstemp.getStateTable().keys(); e.hasMoreElements() && i < fd.length;i++) {
 479                     fstemp.put((FlagDescriptor)e.nextElement(),new Boolean(BoolValTable[i]));
 480                 }
 481                 Adj_List_temp.put(fstemp,new Vector());
 482             }
 483
 484             Enumeration e=Adj_List_temp.keys();
 485             while(e.hasMoreElements()) {
 486                 FlagState fstemp=(FlagState)e.nextElement();
 487                 Enumeration en=Adj_List_temp.keys();
 488                 while (en.hasMoreElements()) {
 489                     FlagState fs=(FlagState)en.nextElement();
 490                     if(fstemp == fs) {
 491                         continue;
 492                     } else {
 493                         ((Vector)Adj_List_temp.get(fstemp)).add(new Edge(fs,"Runtime"));
 494                     }
 495                 }
 496             }
 497         }
 498     }
 499
 500     private Queue createPossibleRuntimeStates(TriggerState ts) throws java.io.IOException {
 501         int noOfIterations, externs;
 502         Hashtable Adj_List_temp;
 503         boolean onlyExterns;
 504
 505         System.out.println("Inside CreatePossible runtime states");
 506
 507         ClassDescriptor cd = ts.getClassDescriptor();
 508         FlagState fs= ts.getState();
 509         if (Adj_List.containsKey(cd)) {
 510             Adj_List_temp=(Hashtable)Adj_List.get(cd);
 511         } else {
 512             Adj_List_temp=new Hashtable();
 513             Adj_List.put(cd,Adj_List_temp);
 514         }
 515
 516         externs=((Integer)extern_flags.get(cd)).intValue();
 517
 518         FlagDescriptor[] fd=(FlagDescriptor[])flags.get(cd);
 519
 520         onlyExterns= (fd.length==externs);
 521
 522         Queue  q_ret=new LinkedList();
 523
 524         if (onlyExterns) {
 525             noOfIterations=1<<fd.length;
 526             boolean BoolValTable[]=new boolean[fd.length];
 527
 528             for(int i=0; i < fd.length ; i++) {
 529                 System.out.println(fd[i].getSymbol());
 530                 BoolValTable[i]=false;
 531             }
 532
 533             if (! wasFlagStateProcessed(Adj_List_temp,fs)) {
 534                 TriggerState ts_local=new TriggerState(cd,fs);
 535                 if (!existsInQueue(ts_local)) {
 536                     q_ret.offer(ts_local);
 537                 }
 538                 Adj_List_temp.put(fs,new Vector());
 539             }
 540
 541             for(int k=1; k<noOfIterations; k++) {
 542                 for(int j=0; j< fd.length ;j++) {
 543                     if ((k% (1<<j))==0)
 544                         BoolValTable[j]=(!BoolValTable[j]);
 545                 }
 546
 547                 FlagState fstemp=new FlagState(fs.getStateTable(),cd);
 548                 int i=0;
 549                 for(Enumeration e=fstemp.getStateTable().keys(); e.hasMoreElements() && i < fd.length;i++) {
 550                     fstemp.put((FlagDescriptor)e.nextElement(),new Boolean(BoolValTable[i]));
 551                 }
 552
 553                 if (wasFlagStateProcessed(Adj_List_temp,fstemp)) {
 554                     continue;
 555                 } else {
 556                     TriggerState ts_local=new TriggerState(cd,fstemp);
 557                     if (!existsInQueue(ts_local)) {
 558                         q_ret.offer(ts_local);
 559                     }
 560
 561
 562                     Adj_List_temp.put(fstemp,new Vector());
 563                 }
 564
 565             }
 566
 567             Enumeration e=Adj_List_temp.keys();
 568             while(e.hasMoreElements()) {
 569                 FlagState fstemp=(FlagState)e.nextElement();
 570                 Enumeration en=Adj_List_temp.keys();
 571                 while (en.hasMoreElements()) {
 572                     FlagState fs_local=(FlagState)en.nextElement();
 573                     if(fstemp == fs_local)
 574                         continue;
 575                     else
 576                         ((Vector)Adj_List_temp.get(fstemp)).add(new Edge(fs_local,"Runtime"));
 577                 }
 578             }
 579
 580             return q_ret;
 581         } else {
 582             System.out.println("inside else part");
 583             noOfIterations=1<<externs;
 584             boolean BoolValTable[]=new boolean[externs];
 585             Hashtable Adj_List_local;
 586
 587
 588             Adj_List_local=new Hashtable();
 589
 590             for(int i=0; i < externs ; i++) {
 591                 System.out.println(fd[i].getSymbol());
 592                 BoolValTable[i]=fs.get(fd[i]);
 593             }
 594
 595             for(int k=1; k<noOfIterations; k++) {
 596                 for(int j=0; j< fd.length ;j++) {
 597                     if ((k% (1<<j))==0)
 598                         BoolValTable[j]=(!BoolValTable[j]);
 599                 }
 600
 601                 FlagState fstemp=new FlagState(fs.getStateTable(),cd);
 602                 FlagDescriptor fdtemp[]=(FlagDescriptor [])flags.get(cd);
 603
 604                 for(int i=0; i < externs;i++)
 605                     {
 606                         fstemp.put(fdtemp[i],new Boolean(BoolValTable[i]));
 607                     }
 608
 609                 q_ret.offer(new TriggerState(cd,fstemp));
 610             }
 611
 612             return q_ret;
 613
 614         }
 615     }
 616
 617     private Queue createPossibleRuntimeStates(ClassDescriptor cd,FlagState fs) throws java.io.IOException {
 618         int noOfIterations, externs;
 619         Hashtable Adj_List_temp;
 620         boolean onlyExterns;
 621
 622         System.out.println("Inside CreatePossible runtime states(flagstates)");
 623
 624         if (Adj_List.containsKey(cd))
 625             Adj_List_temp=(Hashtable)Adj_List.get(cd);
 626         else {
 627             Adj_List_temp=new Hashtable();
 628             Adj_List.put(cd,Adj_List_temp);
 629         }
 630
 631         externs=((Integer)extern_flags.get(cd)).intValue();
 632
 633         FlagDescriptor[] fd=(FlagDescriptor[])flags.get(cd);
 634
 635         onlyExterns=fd.length==externs;
 636
 637         Queue  q_ret;
 638
 639         q_ret=new LinkedList();
 640
 641         if (onlyExterns) {
 642             noOfIterations=1<<fd.length;
 643             boolean BoolValTable[]=new boolean[fd.length];
 644
 645             for(int i=0; i < fd.length ; i++) {
 646                 System.out.println(fd[i].getSymbol());
 647                 BoolValTable[i]=false;
 648             }
 649
 650             return q_ret;
 651         } else {
 652             System.out.println("inside else part(fs)");
 653             noOfIterations=1<<externs;
 654             boolean BoolValTable[]=new boolean[externs];
 655             Hashtable Adj_List_local;
 656
 657
 658             Adj_List_local=new Hashtable();
 659
 660             for(int i=0; i < externs ; i++) {
 661                 System.out.println(fd[i].getSymbol());
 662                 BoolValTable[i]=fs.get(fd[i]);
 663             }
 664
 665             if (! wasFlagStateProcessed(Adj_List_temp,fs)) {
 666                 Adj_List_temp.put(fs,new Vector());
 667             }
 668             for(int k=1; k<noOfIterations; k++) {
 669                 for(int j=0; j< fd.length ;j++) {
 670                     if ((k% (1<<j))==0)
 671                         BoolValTable[j]=(!BoolValTable[j]);
 672                 }
 673
 674                 FlagState fstemp=new FlagState(fs.getStateTable(),cd);
 675                 FlagDescriptor fdtemp[]=(FlagDescriptor [])flags.get(cd);
 676
 677                 for(int i=0; i < externs;i++) {
 678                     fstemp.put(fdtemp[i],new Boolean(BoolValTable[i]));
 679                 }
 680
 681                 q_ret.offer(fstemp);
 682                 ((Vector)(Adj_List_temp.get(fs))).add(new Edge(fstemp,"Runtime"));
 683
 684             }
 685             return q_ret;
 686
 687         }
 688     }
 689
 690
 691     private void processTasksWithPost(ClassDescriptor cd, Hashtable pre) {
 692     }
 693
 694     private ClassDescriptor processFlatNew(FlatNode fn) {
 695         if (! (fn.getNext(0).kind() == 13)) {
 696             return (((FlatNew)fn).getType().getClassDesc());
 697         }
 698         return null;
 699     }
 700
 701 }