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 import java.io.FileOutputStream;
  10
  11
  12 public class TaskAnalysis {
  13     State state;
  14     Hashtable flagstates;
  15     Hashtable flags;
  16     Hashtable extern_flags;
  17     Queue<FlagState> q_main;
  18     Hashtable map;
  19     TempDescriptor temp;
  20     TypeUtil typeutil;
  21
  22     /**
  23      * Class Constructor
  24      *
  25      * @param state a flattened State object
  26      * @see State
  27      * @param map Hashtable containing the temp to var mapping
  28      */
  29     public TaskAnalysis(State state,Hashtable map)
  30     {
  31         this.state=state;
  32         this.map=map;
  33         this.typeutil=new TypeUtil(state);
  34     }
  35
  36     /** This function builds a table of flags for each class **/
  37
  38     private void getFlagsfromClasses() {
  39         flags=new Hashtable();
  40         extern_flags = new Hashtable();
  41
  42         for(Iterator it_classes=state.getClassSymbolTable().getDescriptorsIterator();it_classes.hasNext();) {
  43
  44             ClassDescriptor cd = (ClassDescriptor)it_classes.next();
  45             System.out.println(cd.getSymbol());
  46             Vector vFlags=new Vector();
  47             FlagDescriptor flag[];
  48             int ctr=0;
  49
  50
  51             /* Adding the flags of the super class */
  52             if (cd.getSuper()!=null) {
  53                 ClassDescriptor superdesc=cd.getSuperDesc();
  54
  55                 for(Iterator it_cflags=superdesc.getFlags();it_cflags.hasNext();) {
  56                     FlagDescriptor fd = (FlagDescriptor)it_cflags.next();
  57                     System.out.println(fd.toString());
  58                     vFlags.add(fd);
  59                 }
  60             }
  61
  62             for(Iterator it_cflags=cd.getFlags();it_cflags.hasNext();) {
  63                 FlagDescriptor fd = (FlagDescriptor)it_cflags.next();
  64                 System.out.println(fd.toString());
  65                 vFlags.add(fd);
  66             }
  67
  68             if (vFlags.size()!=0) {
  69                 flag=new FlagDescriptor[vFlags.size()];
  70
  71                 for(int i=0;i < vFlags.size() ; i++) {
  72                     if (((FlagDescriptor)vFlags.get(i)).getExternal()) {
  73                         flag[ctr]=(FlagDescriptor)vFlags.get(i);
  74                         vFlags.remove(flag[ctr]);
  75                         ctr++;
  76                     }
  77                 }
  78                 for(int i=0;i < vFlags.size() ; i++) {
  79                     flag[i+ctr]=(FlagDescriptor)vFlags.get(i);
  80                 }
  81                 extern_flags.put(cd,new Integer(ctr));
  82                 flags.put(cd,flag);
  83
  84             }
  85         }
  86     }
  87
  88     public void taskAnalysis() throws java.io.IOException {
  89         flagstates=new Hashtable();
  90         Hashtable<FlagState,FlagState> sourcenodes;
  91
  92         getFlagsfromClasses();
  93
  94         int externs;
  95         q_main=new LinkedList<FlagState>();
  96
  97         for(Iterator it_classes=(Iterator)flags.keys();it_classes.hasNext();) {
  98             ClassDescriptor cd=(ClassDescriptor)it_classes.next();
  99             externs=((Integer)extern_flags.get(cd)).intValue();
 100             FlagDescriptor[] fd=(FlagDescriptor[])flags.get(cd);
 101
 102             //Debug block
 103             System.out.println("Inside taskAnalysis;\n Class:"+ cd.getSymbol());
 104             System.out.println("No of externs " + externs);
 105             System.out.println("No of flags: "+fd.length);
 106             //Debug block
 107
 108            flagstates.put(cd,new Hashtable<FlagState,FlagState>());
 109         }
 110
 111
 112         ClassDescriptor startupobject=typeutil.getClass(TypeUtil.StartupClass);
 113
 114         sourcenodes=(Hashtable<FlagState,FlagState>)flagstates.get(startupobject);
 115
 116         FlagState fsstartup=new FlagState(startupobject);
 117         FlagDescriptor[] fd=(FlagDescriptor[])flags.get(startupobject);
 118
 119         fsstartup=fsstartup.setFlag(fd[0],true);
 120
 121         sourcenodes.put(fsstartup,fsstartup);
 122
 123         Queue<FlagState> q_temp=analyseTasks(fsstartup);
 124
 125         if ( q_temp != null) {
 126                 q_main.addAll(q_temp);
 127         }
 128
 129         while (q_main.size() > 0) {
 130             // ****debug block********
 131
 132             System.out.println("/***********contents of main q before pop**********/");
 133             for (Iterator it_qm=q_main.iterator();it_qm.hasNext();)
 134                 {
 135
 136                     FlagState fs_qm=(FlagState)it_qm.next();
 137
 138                     System.out.println("FS : "+fs_qm.getClassDescriptor().toString()+" : "+fs_qm.toString((FlagDescriptor [])flags.get(fs_qm.getClassDescriptor())));
 139                 }
 140             System.out.println("/*********************************/");
 141             // ****debug block********
 142             FlagState trigger=q_main.poll();
 143
 144
 145             q_temp=createPossibleRuntimeStates(trigger);
 146
 147             if ( q_temp != null){
 148                     q_main.addAll(q_temp);
 149
 150                 // ****debug block********
 151
 152             System.out.println("/***********contents of main q**********/");
 153             for (Iterator it_qm=q_main.iterator();it_qm.hasNext();)
 154                 {
 155
 156                     FlagState fs_qm=(FlagState)it_qm.next();
 157
 158                     System.out.println("FS : "+fs_qm.getClassDescriptor().toString()+" : "+fs_qm.toString((FlagDescriptor [])flags.get(fs_qm.getClassDescriptor())));
 159                 }
 160             System.out.println("/*********************************/");
 161             // ****debug block********
 162
 163             q_temp=analyseTasks(trigger);
 164
 165             if ( q_temp != null)
 166                         q_main.addAll(q_temp);
 167
 168                 // ****debug block********
 169
 170             System.out.println("/***********contents of main q after analyse tasks**********/");
 171             for (Iterator it_qm=q_main.iterator();it_qm.hasNext();)
 172                 {
 173
 174                     FlagState fs_qm=(FlagState)it_qm.next();
 175
 176                     System.out.println("FS : "+fs_qm.getClassDescriptor().toString()+" : "+fs_qm.toString((FlagDescriptor [])flags.get(fs_qm.getClassDescriptor())));
 177                 }
 178             System.out.println("/*********************************/");
 179             // ****debug block********
 180
 181         }
 182         }
 183
 184         //Creating DOT files
 185         Enumeration e=flagstates.keys();
 186
 187         while (e.hasMoreElements()) {
 188             System.out.println("creating dot file");
 189             ClassDescriptor cdtemp=(ClassDescriptor)e.nextElement();
 190             System.out.println((cdtemp.getSymbol()));
 191             createDOTfile(cdtemp);
 192         }
 193
 194
 195         }
 196
 197
 198     public Queue<FlagState> analyseTasks(FlagState fs) throws java.io.IOException {
 199
 200
 201         Hashtable<FlagState,FlagState> sourcenodes;
 202         Queue<FlagState> q_retval;
 203
 204
 205
 206         ClassDescriptor cd=fs.getClassDescriptor();
 207
 208         sourcenodes=(Hashtable<FlagState,FlagState>)flagstates.get(cd);
 209
 210         int externs=((Integer)extern_flags.get(cd)).intValue();
 211         FlagDescriptor[] fd=(FlagDescriptor[])flags.get(cd);
 212
 213         q_retval=new LinkedList<FlagState>();
 214         //***Debug Block***
 215
 216         //while (q.size() != 0) {
 217             System.out.println("inside while loop in analysetasks \n");
 218
 219             //***Debug Block***
 220             //FlagDescriptor[] ftemp=(FlagDescriptor[])flags.get(cd);
 221             //System.out.println("Processing state: "+cd.getSymbol()+" " + fsworking.toString(ftemp));
 222             //***Debug Block***
 223
 224
 225             for(Iterator it_tasks=state.getTaskSymbolTable().getDescriptorsIterator();it_tasks.hasNext();) {
 226                 TaskDescriptor td = (TaskDescriptor)it_tasks.next();
 227                 boolean taskistriggered=false;
 228                 int trigger_ctr=0;
 229                 String taskname=getTaskName(td);
 230
 231
 232
 233                 //***Debug Block***
 234
 235                 System.out.println("Method: AnalyseTasks");
 236                 System.out.println(taskname);
 237                 System.out.println();
 238
 239                 //***Debug Block***
 240
 241
 242
 243                 for(int i=0; i < td.numParameters(); i++) {
 244                     FlagExpressionNode fen=td.getFlag(td.getParameter(i));
 245                     //if ( (td.getParamType(i).equals(cd))&&(isTaskTrigger(fen,fs))){
 246                         if ((isParamOfSameClass(td.getParamType(i),cd)) && (isTaskTrigger(fen,fs))){
 247                                 taskistriggered = true;
 248                                 System.out.println(td.getParamType(i).toString()+"   "+cd.toString());
 249                                 temp=(TempDescriptor)map.get(td.getParameter(i));
 250                                 trigger_ctr++;
 251                         }
 252                 }
 253
 254                 if (trigger_ctr>1)
 255                         throw new Error("Illegal Operation: A single flagstate cannot satisfy more than one parameter of a task.");
 256
 257                 if (taskistriggered) {
 258                     //***Debug Block***
 259                     //
 260                     System.out.println("inside taskistriggered");
 261
 262                     //***Debug Block***
 263
 264                     taskistriggered=false;
 265                     if (!wasFlagStateProcessed(sourcenodes,fs)){
 266                                 sourcenodes.put(fs,fs);
 267                         }
 268                         else{
 269                                 fs=sourcenodes.get(fs);
 270                         }
 271
 272                         //Iterating through the nodes
 273                     FlatMethod fm = state.getMethodFlat(td);
 274                     FlatNode fn=fm.methodEntryNode();
 275
 276                     HashSet tovisit= new HashSet();
 277                     HashSet visited= new HashSet();
 278
 279                     tovisit.add(fn);
 280                     while(!tovisit.isEmpty()) {
 281                         FlatNode fn1 = (FlatNode)tovisit.iterator().next();
 282                         tovisit.remove(fn1);
 283                         visited.add(fn1);
 284                         for(int i = 0; i < fn1.numNext(); i++) {
 285                             FlatNode nn=fn1.getNext(i);
 286                             if (nn.kind()==FKind.FlatFlagActionNode) {
 287                                 //***Debug Block***
 288                                 if (((FlatFlagActionNode)nn).getTaskType() == FlatFlagActionNode.PRE) {
 289                                     throw new Error("PRE FlagActions not supported");
 290
 291                                 } else if (((FlatFlagActionNode)nn).getTaskType() == FlatFlagActionNode.NEWOBJECT) {
 292                                     //***Debug Block***
 293                                     System.out.println("NEWObject");
 294                                     //***Debug Block***
 295
 296                                     q_retval.offer(evalNewObjNode(nn));
 297                                 }
 298                                 if (((FlatFlagActionNode)nn).getTaskType() == FlatFlagActionNode.TASKEXIT) {
 299                                     //***Debug Block***
 300                                         System.out.println("TaskExit");
 301                                     //***Debug Block***
 302                                     FlagState fs_taskexit=evalTaskExitNode(nn,cd,fs);
 303
 304                                     Edge newedge=new Edge(fs_taskexit,taskname);
 305                                     if (!edgeexists(fs,newedge)) {
 306                                                 fs.addEdge(newedge);
 307                                     }
 308                                     if ((!wasFlagStateProcessed(sourcenodes,fs_taskexit)) && (!existsInQMain(fs_taskexit)) && (!existsInQ(q_retval,fs_taskexit))){
 309                                         q_retval.offer(fs_taskexit);
 310                                     }
 311                                 }
 312                             }
 313
 314                             if (!visited.contains(nn) && !tovisit.contains(nn)) {
 315                                 tovisit.add(nn);
 316                             }
 317                         }
 318
 319                         }
 320             }
 321         }
 322         if (q_retval.size()==0)
 323             return null;
 324         else
 325             return q_retval;
 326     }
 327
 328     private boolean isTaskTrigger(FlagExpressionNode fen,FlagState fs) {
 329         if (fen instanceof FlagNode)
 330             return fs.get(((FlagNode)fen).getFlag());
 331         else
 332             switch (((FlagOpNode)fen).getOp().getOp()) {
 333             case Operation.LOGIC_AND:
 334                 return ((isTaskTrigger(((FlagOpNode)fen).getLeft(),fs)) && (isTaskTrigger(((FlagOpNode)fen).getRight(),fs)));
 335             case Operation.LOGIC_OR:
 336                 return ((isTaskTrigger(((FlagOpNode)fen).getLeft(),fs)) || (isTaskTrigger(((FlagOpNode)fen).getRight(),fs)));
 337             case Operation.LOGIC_NOT:
 338                 return !(isTaskTrigger(((FlagOpNode)fen).getLeft(),fs));
 339             default:
 340                 return false;
 341             }
 342     }
 343
 344     private boolean isParamOfSameClass(TypeDescriptor typedesc, ClassDescriptor classdesc){
 345            /* Set subclasses=typeutil.getSubClasses(classdesc);
 346             if (subclasses!=null){
 347                         if (subclasses.contains(typedesc.getClassDesc()) || typedesc.getClassDesc().equals(classdesc))
 348                                 return true;
 349                         else
 350                                 return false;
 351                 }
 352                 else{
 353                         if (typedesc.getClassDesc().equals(classdesc))
 354                                 return true;
 355                         else
 356                                 return false;
 357                 }*/
 358
 359                  return typeutil.isSuperorType(classdesc,typedesc.getClassDesc());
 360
 361
 362         }
 363
 364
 365     private FlagState evalNewObjNode(FlatNode nn){
 366             TempDescriptor[] tdArray = ((FlatFlagActionNode)nn).readsTemps();
 367
 368                 //Under the safe assumption that all the temps in FFAN.NewObject node are of the same type(class)
 369                 ClassDescriptor cd_new=tdArray[0].getType().getClassDesc();
 370
 371                 FlagState fstemp=new FlagState(cd_new);
 372
 373                 for(Iterator it_tfp=((FlatFlagActionNode)nn).getTempFlagPairs();it_tfp.hasNext();) {
 374                         TempFlagPair tfp=(TempFlagPair)it_tfp.next();
 375                         if (! (tfp.getFlag()==null))// condition checks if the new object was created without any flag setting
 376                         {
 377                                 fstemp=fstemp.setFlag(tfp.getFlag(),((FlatFlagActionNode)nn).getFlagChange(tfp));
 378                         }
 379                         else
 380                                 break;
 381                 }
 382                 return fstemp;
 383         }
 384
 385         private FlagState evalTaskExitNode(FlatNode nn,ClassDescriptor cd,FlagState fs){
 386                 FlagState fstemp=fs;
 387
 388                 for(Iterator it_tfp=((FlatFlagActionNode)nn).getTempFlagPairs();it_tfp.hasNext();) {
 389                         TempFlagPair tfp=(TempFlagPair)it_tfp.next();
 390                         if (temp.toString().equals(tfp.getTemp().toString()))
 391                                 fstemp=fstemp.setFlag(tfp.getFlag(),((FlatFlagActionNode)nn).getFlagChange(tfp));
 392                 }
 393                 return fstemp;
 394         }
 395
 396
 397     private boolean wasFlagStateProcessed(Hashtable sourcenodes,FlagState fs) {
 398                 if (sourcenodes.containsKey(fs))
 399                         return true;
 400                 else
 401                         return false;
 402     }
 403
 404    /* private boolean existsInQueue(TriggerState ts) {
 405         throw new Error("Use hashcode/contains of set method to find...no linear search allowed");
 406     }*/
 407
 408     private boolean existsInQMain(FlagState fs) {
 409                 if (q_main.contains(fs))
 410                         return true;
 411                 else
 412                         return false;
 413     }
 414
 415     private boolean existsInQ(Queue q,FlagState fs) {
 416                 if (q.contains(fs))
 417                         return true;
 418                 else
 419                         return false;
 420     }
 421
 422
 423    /* public void printAdjList(ClassDescriptor cd) {
 424         Enumeration e=((Hashtable)Adj_List.get(cd)).keys();
 425         while(e.hasMoreElements()) {
 426             FlagState fsv = (FlagState)(e.nextElement());
 427             System.out.println(fsv.toString((FlagDescriptor [])flags.get(cd)));
 428         }
 429     }*/
 430
 431    public void createDOTfile(ClassDescriptor cd) throws java.io.IOException {
 432
 433         File dotfile= new File("graph"+cd.getSymbol()+".dot");
 434
 435         FileOutputStream dotstream=new FileOutputStream(dotfile,true);
 436
 437         FlagState.DOTVisitor.visit(dotstream,((Hashtable)flagstates.get(cd)).values());
 438    }
 439
 440
 441     private String getTaskName(TaskDescriptor td) {
 442         StringTokenizer st = new StringTokenizer(td.toString(),"(");
 443         return st.nextToken();
 444     }
 445
 446    /* private boolean edgeexists(Hashtable Adj_List_local,FlagState v1, FlagState v2,String label) {
 447         Vector edges=(Vector)Adj_List_local.get(v1);
 448
 449         if (edges != null) {
 450             for(int i=0;i < edges.size();i++) {
 451                 FlagState fs=((Edge)edges.get(i)).getTarget();
 452                 if (fs.equals(v2) && (label.compareTo(((Edge)edges.get(i)).getLabel())==0))
 453                     return true;
 454             }
 455         }
 456         return false;
 457     }*/
 458
 459     private boolean edgeexists(FlagState fs, Edge newedge){
 460                 for(Iterator it_edges=fs.edges();it_edges.hasNext();){
 461                                 Edge e=(Edge)it_edges.next();
 462                                 if (newedge.equals(e))
 463                                         return true;
 464                 }
 465                 return false;
 466         }
 467
 468     private Queue createPossibleRuntimeStates(FlagState fs) throws java.io.IOException {
 469
 470                 int noOfIterations, externs;
 471                 Hashtable<FlagState,FlagState> sourcenodes;
 472
 473
 474                 System.out.println("Inside CreatePossible runtime states");
 475
 476                 ClassDescriptor cd = fs.getClassDescriptor();
 477
 478                 sourcenodes=(Hashtable<FlagState,FlagState>)flagstates.get(cd);
 479                 FlagDescriptor[] fd=(FlagDescriptor[])flags.get(cd);
 480                 externs=((Integer)extern_flags.get(cd)).intValue();
 481                 //System.out.println("No of externs:"+externs);
 482
 483
 484                 Queue<FlagState>  q_ret=new LinkedList<FlagState>();
 485
 486
 487             noOfIterations=(1<<externs) - 1;
 488            // System.out.println("No of iterations: "+noOfIterations);
 489             boolean BoolValTable[]=new boolean[externs];
 490
 491             for(int i=0; i < externs ; i++) {
 492                 System.out.println(fd[i].getSymbol());
 493                 BoolValTable[i]=fs.get(fd[i]);
 494             }
 495
 496            /* if (! wasFlagStateProcessed(Adj_List_temp,fs)) {
 497                         Adj_List_temp.put(fs,new Vector());
 498             }
 499             */
 500             if (externs > 0){
 501                 sourcenodes.put(fs,fs);
 502
 503                         for(int k=0; k<noOfIterations; k++) {
 504                                 for(int j=0; j < externs ;j++) {
 505                                     if ((k% (1<<j)) == 0)
 506                                                 BoolValTable[j]=(!BoolValTable[j]);
 507                                 }
 508
 509                                 FlagState fstemp=fs;
 510
 511                                 for(int i=0; i < externs;i++) {
 512                                     fstemp=fstemp.setFlag(fd[i],BoolValTable[i]);
 513                                 }
 514                                 fs.addEdge(new Edge(fstemp,"Runtime"));
 515
 516                                 if (!existsInQMain(fstemp) && ! wasFlagStateProcessed(sourcenodes,fstemp)){
 517                                         q_ret.add(fstemp);
 518                                 }
 519
 520                         }
 521                 }
 522                 return q_ret;
 523         }
 524
 525
 526
 527
 528     private void processTasksWithPost(ClassDescriptor cd, Hashtable pre) {
 529     }
 530
 531     private ClassDescriptor processFlatNew(FlatNode fn) {
 532         if (! (fn.getNext(0).kind() == 13)) {
 533             return (((FlatNew)fn).getType().getClassDesc());
 534         }
 535         return null;
 536     }
 537
 538 }