Robust/src/Analysis/FlatIRGraph/FlatIRGraph.java

   1 package Analysis.FlatIRGraph;
   2
   3 import IR.*;
   4 import IR.Flat.*;
   5 import java.util.*;
   6 import java.io.*;
   7
   8 public class FlatIRGraph {
   9
  10     private State state;
  11
  12     private BufferedWriter flatbw;
  13
  14     private HashSet<FlatNode> visited;
  15     private HashSet<FlatNode> toVisit;
  16
  17     private int labelindex;
  18     private Hashtable<FlatNode, Integer> flatnodetolabel;
  19
  20     public FlatIRGraph(State state, boolean tasks, boolean usermethods, boolean libmethods) throws java.io.IOException {
  21         this.state=state;
  22
  23         if( tasks )
  24             graphTasks();
  25
  26         if( usermethods || libmethods )
  27             graphMethods();
  28     }
  29
  30     private void graphTasks() throws java.io.IOException {
  31         for(Iterator it_tasks=state.getTaskSymbolTable().getDescriptorsIterator();it_tasks.hasNext();) {
  32             TaskDescriptor td = (TaskDescriptor)it_tasks.next();
  33             FlatMethod fm = state.getMethodFlat(td);
  34             writeFlatIRGraph(fm,"task"+td.getSymbol());
  35         }
  36     }
  37
  38     private void graphMethods() throws java.io.IOException {
  39         for(Iterator it_classes=state.getClassSymbolTable().getDescriptorsIterator();it_classes.hasNext();) {
  40             ClassDescriptor cd = (ClassDescriptor)it_classes.next();
  41             for(Iterator it_methods=cd.getMethods();it_methods.hasNext();) {
  42                 MethodDescriptor md = (MethodDescriptor)it_methods.next();
  43                 FlatMethod fm = state.getMethodFlat(md);
  44                 writeFlatIRGraph(fm,cd.getSymbol()+"."+md.getSymbol());
  45             }
  46         }
  47     }
  48
  49     private void writeFlatIRGraph( FlatMethod fm, String graphname ) throws java.io.IOException {
  50         // give every node in the flat IR graph a unique label
  51         // so a human being can inspect the graph and verify
  52         // correctness
  53         flatnodetolabel=new Hashtable<FlatNode, Integer>();
  54         visited=new HashSet<FlatNode>();
  55         labelindex=0;
  56         labelFlatNodes( fm );
  57
  58         flatbw=new BufferedWriter( new FileWriter( graphname+"_flatIRGraph.dot" ) );
  59         flatbw.write("digraph "+graphname+" {\n");
  60
  61         visited=new HashSet<FlatNode>();
  62         toVisit=new HashSet<FlatNode>();
  63         toVisit.add(fm);
  64
  65         while( !toVisit.isEmpty() ) {
  66             FlatNode fn=(FlatNode)toVisit.iterator().next();
  67             toVisit.remove(fn);
  68             visited.add(fn);
  69
  70             if( fn.kind() == FKind.FlatMethod ) {
  71                 // FlatMethod does not have toString
  72                 flatbw.write( makeDotNodeDec( graphname, flatnodetolabel.get(fn), fn.getClass().getName(), "FlatMethod" ) );
  73             } else {
  74                 flatbw.write( makeDotNodeDec( graphname, flatnodetolabel.get(fn), fn.getClass().getName(), fn.toString() ) );
  75             }
  76
  77             for(int i=0;i<fn.numNext();i++) {
  78                 FlatNode nn=fn.getNext(i);
  79                 flatbw.write( "  node"+flatnodetolabel.get(fn)+" -> node"+flatnodetolabel.get(nn)+";\n" );
  80
  81                 if( !visited.contains( nn ) ) {
  82                     toVisit.add( nn );
  83                 }
  84             }
  85         }
  86
  87         flatbw.write( "}\n" );
  88         flatbw.close();
  89     }
  90
  91     private void labelFlatNodes(FlatNode fn) {
  92         visited.add(fn);
  93         flatnodetolabel.put(fn,new Integer(labelindex++));
  94         for(int i=0;i<fn.numNext();i++) {
  95             FlatNode nn=fn.getNext(i);
  96             if(!visited.contains(nn)) {
  97                 labelFlatNodes(nn);
  98             }
  99         }
 100     }
 101
 102     private String makeNodeName( String graphname, Integer id, String type ) {
 103         String s = String.format( "%05d", id );
 104         return "FN"+s+"_"+type;
 105     }
 106
 107     private String makeDotNodeDec( String graphname, Integer id, String type, String details ) {
 108         if( details == null ) {
 109             return "  node"+id+"[label=\""+makeNodeName(graphname,id,type)+"\"];\n";
 110         } else {
 111             return "  node"+id+"[label=\""+makeNodeName(graphname,id,type)+"\\n"+details+"\"];\n";
 112         }
 113     }
 114 }