1 package Analysis.TaskStateAnalysis;
2 import Analysis.TaskStateAnalysis.*;
8 import java.io.FileOutputStream;
10 public class TaskAnalysis {
14 Hashtable extern_flags;
15 Queue<FlagState> q_main;
23 * @param state a flattened State object
25 * @param map Hashtable containing the temp to var mapping
27 public TaskAnalysis(State state,Hashtable map)
31 this.typeutil=new TypeUtil(state);
34 /** This function builds a table of flags for each class **/
36 private void getFlagsfromClasses() {
37 flags=new Hashtable();
38 extern_flags = new Hashtable();
40 for(Iterator it_classes=state.getClassSymbolTable().getDescriptorsIterator();it_classes.hasNext();) {
42 ClassDescriptor cd = (ClassDescriptor)it_classes.next();
43 System.out.println(cd.getSymbol());
44 Vector vFlags=new Vector();
45 FlagDescriptor flag[];
49 /* Adding the flags of the super class */
50 if (cd.getSuper()!=null) {
51 ClassDescriptor superdesc=cd.getSuperDesc();
53 for(Iterator it_cflags=superdesc.getFlags();it_cflags.hasNext();) {
54 FlagDescriptor fd = (FlagDescriptor)it_cflags.next();
55 System.out.println(fd.toString());
60 for(Iterator it_cflags=cd.getFlags();it_cflags.hasNext();) {
61 FlagDescriptor fd = (FlagDescriptor)it_cflags.next();
62 System.out.println(fd.toString());
66 if (vFlags.size()!=0) {
67 flag=new FlagDescriptor[vFlags.size()];
69 for(int i=0;i < vFlags.size() ; i++) {
70 if (((FlagDescriptor)vFlags.get(i)).getExternal()) {
71 flag[ctr]=(FlagDescriptor)vFlags.get(i);
72 vFlags.remove(flag[ctr]);
76 for(int i=0;i < vFlags.size() ; i++) {
77 flag[i+ctr]=(FlagDescriptor)vFlags.get(i);
79 extern_flags.put(cd,new Integer(ctr));
86 public void taskAnalysis() throws java.io.IOException {
87 flagstates=new Hashtable();
88 Hashtable<FlagState,FlagState> sourcenodes;
90 getFlagsfromClasses();
93 q_main=new LinkedList<FlagState>();
95 for(Iterator it_classes=(Iterator)flags.keys();it_classes.hasNext();) {
96 ClassDescriptor cd=(ClassDescriptor)it_classes.next();
97 externs=((Integer)extern_flags.get(cd)).intValue();
98 FlagDescriptor[] fd=(FlagDescriptor[])flags.get(cd);
101 System.out.println("Inside taskAnalysis;\n Class:"+ cd.getSymbol());
102 System.out.println("No of externs " + externs);
103 System.out.println("No of flags: "+fd.length);
106 flagstates.put(cd,new Hashtable<FlagState,FlagState>());
110 ClassDescriptor startupobject=typeutil.getClass(TypeUtil.StartupClass);
112 sourcenodes=(Hashtable<FlagState,FlagState>)flagstates.get(startupobject);
114 FlagState fsstartup=new FlagState(startupobject);
115 FlagDescriptor[] fd=(FlagDescriptor[])flags.get(startupobject);
117 fsstartup=fsstartup.setFlag(fd[0],true);
119 sourcenodes.put(fsstartup,fsstartup);
121 Queue<FlagState> q_temp=analyseTasks(fsstartup);
123 if ( q_temp != null) {
124 q_main.addAll(q_temp);
127 while (q_main.size() > 0) {
128 // ****debug block********
130 System.out.println("/***********contents of main q before pop**********/");
131 for (Iterator it_qm=q_main.iterator();it_qm.hasNext();)
134 FlagState fs_qm=(FlagState)it_qm.next();
136 System.out.println("FS : "+fs_qm.getClassDescriptor().toString()+" : "+fs_qm.toString((FlagDescriptor [])flags.get(fs_qm.getClassDescriptor())));
138 System.out.println("/*********************************/");
139 // ****debug block********
140 FlagState trigger=q_main.poll();
143 q_temp=createPossibleRuntimeStates(trigger);
145 if ( q_temp != null){
146 q_main.addAll(q_temp);
148 // ****debug block********
150 System.out.println("/***********contents of main q**********/");
151 for (Iterator it_qm=q_main.iterator();it_qm.hasNext();)
154 FlagState fs_qm=(FlagState)it_qm.next();
156 System.out.println("FS : "+fs_qm.getClassDescriptor().toString()+" : "+fs_qm.toString((FlagDescriptor [])flags.get(fs_qm.getClassDescriptor())));
158 System.out.println("/*********************************/");
159 // ****debug block********
161 q_temp=analyseTasks(trigger);
164 q_main.addAll(q_temp);
166 // ****debug block********
168 System.out.println("/***********contents of main q after analyse tasks**********/");
169 for (Iterator it_qm=q_main.iterator();it_qm.hasNext();)
172 FlagState fs_qm=(FlagState)it_qm.next();
174 System.out.println("FS : "+fs_qm.getClassDescriptor().toString()+" : "+fs_qm.toString((FlagDescriptor [])flags.get(fs_qm.getClassDescriptor())));
176 System.out.println("/*********************************/");
177 // ****debug block********
183 Enumeration e=flagstates.keys();
185 while (e.hasMoreElements()) {
186 System.out.println("creating dot file");
187 ClassDescriptor cdtemp=(ClassDescriptor)e.nextElement();
188 System.out.println((cdtemp.getSymbol()));
189 createDOTfile(cdtemp);
196 public Queue<FlagState> analyseTasks(FlagState fs) throws java.io.IOException {
199 Hashtable<FlagState,FlagState> sourcenodes;
200 Queue<FlagState> q_retval;
204 ClassDescriptor cd=fs.getClassDescriptor();
206 sourcenodes=(Hashtable<FlagState,FlagState>)flagstates.get(cd);
208 int externs=((Integer)extern_flags.get(cd)).intValue();
209 FlagDescriptor[] fd=(FlagDescriptor[])flags.get(cd);
211 q_retval=new LinkedList<FlagState>();
214 //while (q.size() != 0) {
215 System.out.println("inside while loop in analysetasks \n");
218 //FlagDescriptor[] ftemp=(FlagDescriptor[])flags.get(cd);
219 //System.out.println("Processing state: "+cd.getSymbol()+" " + fsworking.toString(ftemp));
223 for(Iterator it_tasks=state.getTaskSymbolTable().getDescriptorsIterator();it_tasks.hasNext();) {
224 TaskDescriptor td = (TaskDescriptor)it_tasks.next();
225 boolean taskistriggered=false;
227 String taskname=getTaskName(td);
233 System.out.println("Method: AnalyseTasks");
234 System.out.println(taskname);
235 System.out.println();
241 for(int i=0; i < td.numParameters(); i++) {
242 FlagExpressionNode fen=td.getFlag(td.getParameter(i));
243 //if ( (td.getParamType(i).equals(cd))&&(isTaskTrigger(fen,fs))){
244 if ((isParamOfSameClass(td.getParamType(i),cd)) && (isTaskTrigger(fen,fs))){
245 taskistriggered = true;
246 System.out.println(td.getParamType(i).toString()+" "+cd.toString());
247 temp=(TempDescriptor)map.get(td.getParameter(i));
253 throw new Error("Illegal Operation: A single flagstate cannot satisfy more than one parameter of a task.");
255 if (taskistriggered) {
258 System.out.println("inside taskistriggered");
262 taskistriggered=false;
263 if (!wasFlagStateProcessed(sourcenodes,fs)){
264 sourcenodes.put(fs,fs);
267 fs=sourcenodes.get(fs);
270 //Iterating through the nodes
271 FlatMethod fm = state.getMethodFlat(td);
272 FlatNode fn=fm.methodEntryNode();
274 HashSet tovisit= new HashSet();
275 HashSet visited= new HashSet();
278 while(!tovisit.isEmpty()) {
279 FlatNode fn1 = (FlatNode)tovisit.iterator().next();
282 for(int i = 0; i < fn1.numNext(); i++) {
283 FlatNode nn=fn1.getNext(i);
284 if (nn.kind()==FKind.FlatFlagActionNode) {
286 if (((FlatFlagActionNode)nn).getTaskType() == FlatFlagActionNode.PRE) {
287 throw new Error("PRE FlagActions not supported");
289 } else if (((FlatFlagActionNode)nn).getTaskType() == FlatFlagActionNode.NEWOBJECT) {
291 System.out.println("NEWObject");
294 q_retval.offer(evalNewObjNode(nn));
296 if (((FlatFlagActionNode)nn).getTaskType() == FlatFlagActionNode.TASKEXIT) {
298 System.out.println("TaskExit");
300 FlagState fs_taskexit=evalTaskExitNode(nn,cd,fs);
302 Edge newedge=new Edge(fs_taskexit,taskname);
303 if (!edgeexists(fs,newedge)) {
306 if ((!wasFlagStateProcessed(sourcenodes,fs_taskexit)) && (!existsInQMain(fs_taskexit)) && (!existsInQ(q_retval,fs_taskexit))){
307 q_retval.offer(fs_taskexit);
312 if (!visited.contains(nn) && !tovisit.contains(nn)) {
320 if (q_retval.size()==0)
326 private boolean isTaskTrigger(FlagExpressionNode fen,FlagState fs) {
327 if (fen instanceof FlagNode)
328 return fs.get(((FlagNode)fen).getFlag());
330 switch (((FlagOpNode)fen).getOp().getOp()) {
331 case Operation.LOGIC_AND:
332 return ((isTaskTrigger(((FlagOpNode)fen).getLeft(),fs)) && (isTaskTrigger(((FlagOpNode)fen).getRight(),fs)));
333 case Operation.LOGIC_OR:
334 return ((isTaskTrigger(((FlagOpNode)fen).getLeft(),fs)) || (isTaskTrigger(((FlagOpNode)fen).getRight(),fs)));
335 case Operation.LOGIC_NOT:
336 return !(isTaskTrigger(((FlagOpNode)fen).getLeft(),fs));
342 private boolean isParamOfSameClass(TypeDescriptor typedesc, ClassDescriptor classdesc){
343 /* Set subclasses=typeutil.getSubClasses(classdesc);
344 if (subclasses!=null){
345 if (subclasses.contains(typedesc.getClassDesc()) || typedesc.getClassDesc().equals(classdesc))
351 if (typedesc.getClassDesc().equals(classdesc))
357 return typeutil.isSuperorType(classdesc,typedesc.getClassDesc());
363 private FlagState evalNewObjNode(FlatNode nn){
364 TempDescriptor[] tdArray = ((FlatFlagActionNode)nn).readsTemps();
366 //Under the safe assumption that all the temps in FFAN.NewObject node are of the same type(class)
367 ClassDescriptor cd_new=tdArray[0].getType().getClassDesc();
369 FlagState fstemp=new FlagState(cd_new);
371 for(Iterator it_tfp=((FlatFlagActionNode)nn).getTempFlagPairs();it_tfp.hasNext();) {
372 TempFlagPair tfp=(TempFlagPair)it_tfp.next();
373 if (! (tfp.getFlag()==null))// condition checks if the new object was created without any flag setting
375 fstemp=fstemp.setFlag(tfp.getFlag(),((FlatFlagActionNode)nn).getFlagChange(tfp));
383 private FlagState evalTaskExitNode(FlatNode nn,ClassDescriptor cd,FlagState fs){
386 for(Iterator it_tfp=((FlatFlagActionNode)nn).getTempFlagPairs();it_tfp.hasNext();) {
387 TempFlagPair tfp=(TempFlagPair)it_tfp.next();
388 if (temp.toString().equals(tfp.getTemp().toString()))
389 fstemp=fstemp.setFlag(tfp.getFlag(),((FlatFlagActionNode)nn).getFlagChange(tfp));
395 private boolean wasFlagStateProcessed(Hashtable sourcenodes,FlagState fs) {
396 if (sourcenodes.containsKey(fs))
402 /* private boolean existsInQueue(TriggerState ts) {
403 throw new Error("Use hashcode/contains of set method to find...no linear search allowed");
406 private boolean existsInQMain(FlagState fs) {
407 if (q_main.contains(fs))
413 private boolean existsInQ(Queue q,FlagState fs) {
421 /* public void printAdjList(ClassDescriptor cd) {
422 Enumeration e=((Hashtable)Adj_List.get(cd)).keys();
423 while(e.hasMoreElements()) {
424 FlagState fsv = (FlagState)(e.nextElement());
425 System.out.println(fsv.toString((FlagDescriptor [])flags.get(cd)));
429 public void createDOTfile(ClassDescriptor cd) throws java.io.IOException {
431 File dotfile= new File("graph"+cd.getSymbol()+".dot");
433 FileOutputStream dotstream=new FileOutputStream(dotfile,true);
435 FlagState.DOTVisitor.visit(dotstream,((Hashtable)flagstates.get(cd)).values());
440 private String getTaskName(TaskDescriptor td) {
441 StringTokenizer st = new StringTokenizer(td.toString(),"(");
442 return st.nextToken();
445 /* private boolean edgeexists(Hashtable Adj_List_local,FlagState v1, FlagState v2,String label) {
446 Vector edges=(Vector)Adj_List_local.get(v1);
449 for(int i=0;i < edges.size();i++) {
450 FlagState fs=((Edge)edges.get(i)).getTarget();
451 if (fs.equals(v2) && (label.compareTo(((Edge)edges.get(i)).getLabel())==0))
458 private boolean edgeexists(FlagState fs, Edge newedge){
459 for(Iterator it_edges=fs.edges();it_edges.hasNext();){
460 Edge e=(Edge)it_edges.next();
461 if (newedge.equals(e))
467 private Queue createPossibleRuntimeStates(FlagState fs) throws java.io.IOException {
469 int noOfIterations, externs;
470 Hashtable<FlagState,FlagState> sourcenodes;
473 System.out.println("Inside CreatePossible runtime states");
475 ClassDescriptor cd = fs.getClassDescriptor();
477 sourcenodes=(Hashtable<FlagState,FlagState>)flagstates.get(cd);
478 FlagDescriptor[] fd=(FlagDescriptor[])flags.get(cd);
479 externs=((Integer)extern_flags.get(cd)).intValue();
480 //System.out.println("No of externs:"+externs);
483 Queue<FlagState> q_ret=new LinkedList<FlagState>();
486 noOfIterations=(1<<externs) - 1;
487 // System.out.println("No of iterations: "+noOfIterations);
488 boolean BoolValTable[]=new boolean[externs];
490 for(int i=0; i < externs ; i++) {
491 System.out.println(fd[i].getSymbol());
492 BoolValTable[i]=fs.get(fd[i]);
495 /* if (! wasFlagStateProcessed(Adj_List_temp,fs)) {
496 Adj_List_temp.put(fs,new Vector());
500 sourcenodes.put(fs,fs);
502 for(int k=0; k<noOfIterations; k++) {
503 for(int j=0; j < externs ;j++) {
504 if ((k% (1<<j)) == 0)
505 BoolValTable[j]=(!BoolValTable[j]);
510 for(int i=0; i < externs;i++) {
511 fstemp=fstemp.setFlag(fd[i],BoolValTable[i]);
513 fs.addEdge(new Edge(fstemp,"Runtime"));
515 if (!existsInQMain(fstemp) && ! wasFlagStateProcessed(sourcenodes,fstemp)){
527 private void processTasksWithPost(ClassDescriptor cd, Hashtable pre) {
530 private ClassDescriptor processFlatNew(FlatNode fn) {
531 if (! (fn.getNext(0).kind() == 13)) {
532 return (((FlatNew)fn).getType().getClassDesc());