src/org/ibex/arenaj/Main.java

   1 package org.ibex.arenaj;
   2 import soot.*;
   3 import soot.jimple.*;
   4 import soot.util.*;
   5 import java.io.*;
   6 import java.util.*;
   7
   8 public class Main extends SceneTransformer {
   9
  10     public static final int initialSize = 1000;
  11
  12     private static Main instance = new Main();
  13     private Main() { }
  14     public static Main v() { return instance; }
  15
  16     public static void main(String[] args) throws Exception {
  17         if(args.length == 0) {
  18             System.out.println("Syntax: java " + v().getClass().getName() + " [soot options]");
  19             System.exit(0);
  20         }
  21         PackManager.v().getPack("wjtp").add(new Transform("wjtp.tx", Main.v()));
  22         String[] args2 = new String[args.length + 14];
  23         System.arraycopy(args, 0, args2, 0, args.length-1);
  24         String sootcp =
  25             System.getProperty("java.class.path") +
  26             File.pathSeparator +
  27             System.getProperty("sun.boot.class.path");
  28         String extDirs = System.getProperty("java.ext.dirs");
  29         if (extDirs != null) {
  30             StringTokenizer st = new StringTokenizer(extDirs, File.pathSeparatorChar+"");
  31             while(st.hasMoreTokens()) {
  32                 String goo = st.nextToken();
  33                 System.out.println("goo " + goo);
  34                 File f = new File(goo);
  35                 if (!f.exists() || !f.isDirectory()) continue;
  36                 String[] jars = f.list();
  37                 for(int i=0; i<jars.length; i++)
  38                     sootcp += File.pathSeparator + f.getPath() + File.separatorChar + jars[i];
  39             }
  40         }
  41         args2[args.length - 1] = "-w";
  42         args2[args.length + 0] = "-p";
  43         args2[args.length + 1] = "cg";
  44         args2[args.length + 2] = "enabled:false";
  45         args2[args.length + 3] = "-p";
  46         args2[args.length + 4] = "wjap";
  47         args2[args.length + 5] = "enabled:false";
  48         args2[args.length + 6] = "-p";
  49         args2[args.length + 7] = "jtp";
  50         args2[args.length + 8] = "enabled:false";
  51         args2[args.length + 9] = "-allow-phantom-refs";
  52         args2[args.length + 10] = "-allow-phantom-refs";
  53         args2[args.length + 11] = "-cp";
  54         args2[args.length + 12] = sootcp;
  55         System.out.println("sootcp => " + sootcp);
  56         args2[args.length + 13] = args[args.length-1];
  57         for(int i=0; i<args2.length; i++) System.out.println("args2["+i+"] = " + args2[i]);
  58         soot.Main.main(args2);
  59     }
  60
  61     // The main loop //////////////////////////////////////////////////////////////////////////////
  62
  63     public void internalTransform(String phaseName, Map options) {
  64         init();
  65         List ac = new LinkedList();
  66         for(Iterator it = Scene.v().getClasses().iterator(); it.hasNext();) {
  67             SootClass sc = (SootClass)it.next();
  68             sc.setLibraryClass();
  69         }
  70         for(Iterator it = Scene.v().getClasses().iterator(); it.hasNext();) {
  71             SootClass sc = (SootClass)it.next();
  72             if (!implementsGladiator(sc)) continue;
  73             System.out.println("  application class: " + sc.getName());
  74             System.out.println("  application class: " + getArenaForGladiator(sc).getName());
  75             sc.setApplicationClass();
  76             getArenaForGladiator(sc).setApplicationClass();
  77             ac.add(sc);
  78             ac.add(getArenaForGladiator(sc));
  79         }
  80         for(Iterator it = ac.iterator(); it.hasNext();) {
  81             SootClass sc = (SootClass)it.next();
  82             if (sc.isInterface() || !implementsGladiator(sc)) continue;
  83             processGladiatorClass(sc);
  84         }
  85         for(Iterator it = ac.iterator(); it.hasNext();) {
  86             SootClass sc = (SootClass)it.next();
  87             if (sc.isInterface()) continue;
  88             processClass(sc);
  89         }
  90     }
  91
  92     // Initializers //////////////////////////////////////////////////////////////////////////////
  93
  94     public Type objectType;
  95     public List arrayCopyTypes = new LinkedList();
  96     public SootMethodRef arrayCopy;
  97     public void init() {
  98         objectType = Scene.v().getSootClass("java.lang.Object").getType();
  99         arrayCopyTypes.add(objectType);
 100         arrayCopyTypes.add(IntType.v());
 101         arrayCopyTypes.add(objectType);
 102         arrayCopyTypes.add(IntType.v());
 103         arrayCopyTypes.add(IntType.v());
 104         arrayCopy =
 105             Scene.v().makeMethodRef(Scene.v().getSootClass("java.lang.System"),
 106                                     "arraycopy",
 107                                     arrayCopyTypes,
 108                                     VoidType.v(),
 109                                     true);
 110     }
 111
 112     // Helpers //////////////////////////////////////////////////////////////////////////////
 113
 114     private int tfr = 0;
 115     public Local newLocal(Body b, Type t) {
 116         Local l = Jimple.v().newLocal("tmpRef" + (tfr++), t);
 117         b.getLocals().add(l);
 118         return l;
 119     }
 120
 121     public Local viaLocal(Value v, Body b, Unit u) {
 122         Local l = newLocal(b, v.getType());
 123         if (v instanceof IdentityRef) b.getUnits().insertBefore(Jimple.v().newIdentityStmt(l, v), u);
 124         else b.getUnits().insertBefore(Jimple.v().newAssignStmt(l, v), u);
 125         return l;
 126     }
 127
 128     boolean          implementsGladiator(SootClass c)  { return c.implementsInterface("org.ibex.arenaj.Gladiator"); }
 129     boolean          implementsGladiator(Type t) {return (t instanceof RefType)&&implementsGladiator(((RefType)t).getSootClass());}
 130     String           getArenaName(SootClass sc) { return sc.getName().substring(0, sc.getName().lastIndexOf('$')); }
 131     String           getGladiatorName(SootClass sc) { return sc.getName().substring(sc.getName().lastIndexOf('$')+1); }
 132     SootClass        getArenaForGladiator(SootClass sc) { return Scene.v().getSootClass(getArenaName(sc)); }
 133     InstanceFieldRef newIFR(Body b, SootFieldRef fr) { return Jimple.v().newInstanceFieldRef(b.getThisLocal(), fr); }
 134     void             assign(Body b, Value left, Value right) { b.getUnits().add(Jimple.v().newAssignStmt(left, right)); }
 135     void             assign(Body b, Value l, Value r, Stmt w) { b.getUnits().insertBefore(Jimple.v().newAssignStmt(l, r), w); }
 136     Type             getSliceElementType(Type t) { return implementsGladiator(t) ? IntType.v() : t; }
 137     SootFieldRef     getSliceForField(SootField f)    { return getSliceForField(f.makeRef()); }
 138     SootFieldRef     getSliceForField(SootFieldRef f) {
 139         return Scene.v().makeFieldRef(getArenaForGladiator(f.declaringClass()),
 140                                       getGladiatorName(f.declaringClass())+"$$"+f.name(),
 141                                       getSliceElementType(f.type()).makeArrayType(),
 142                                       false);
 143     }
 144
 145
 146     // Operations performed on the Gladiator class //////////////////////////////////////////////////////////////////////////
 147
 148     public SootMethod createIncMethod(SootClass sc) {
 149         String incFuncName = getGladiatorName(sc) + "$$inc";
 150         SootClass arena = getArenaForGladiator(sc);
 151         SootMethod method = new SootMethod(incFuncName, new LinkedList(), IntType.v(), Modifier.PRIVATE, new LinkedList());
 152         arena.addMethod(method);
 153         Body incBody = Jimple.v().newBody(method);
 154         method.setActiveBody(incBody);
 155         ((JimpleBody)incBody).insertIdentityStmts();
 156         return method;
 157     }
 158
 159     public void processGladiatorClass(SootClass sc) {
 160
 161         // Set up the Arena zero-arg constructor
 162
 163         SootClass            arena = getArenaForGladiator(sc);
 164         SootMethod arenaInitMethod = arena.getMethod("<init>", new LinkedList());
 165         JimpleBody   arenaInitBody = (JimpleBody)arenaInitMethod.getActiveBody();
 166
 167         SootField maxField = new SootField(getGladiatorName(sc) + "$$max", IntType.v());
 168         arena.addField(maxField);
 169         assign(arenaInitBody, newIFR(arenaInitBody, maxField.makeRef()), IntConstant.v(initialSize),
 170                arenaInitBody.getFirstNonIdentityStmt());
 171
 172         SootField sfr = new SootField(getGladiatorName(sc) + "$$size", IntType.v());
 173         arena.addField(sfr);
 174         assign(arenaInitBody, newIFR(arenaInitBody, sfr.makeRef()), IntConstant.v(0),
 175                arenaInitBody.getFirstNonIdentityStmt());
 176
 177         SootMethod incMethod = createIncMethod(sc);
 178         Body         incBody = incMethod.getActiveBody();
 179
 180
 181         // Now build the $$inc method
 182
 183         Local l  =  newLocal(incBody, IntType.v());
 184         Local l2 =  newLocal(incBody, IntType.v());
 185         Local l3 =  newLocal(incBody, IntType.v());
 186         Local l4 =  newLocal(incBody, IntType.v());
 187
 188         assign(incBody, l,                                 newIFR(incBody, sfr.makeRef()));
 189         assign(incBody, l2,                                Jimple.v().newAddExpr(l, IntConstant.v(1)));
 190         assign(incBody, newIFR(incBody, sfr.makeRef()),       l2);
 191         assign(incBody, l3,                                newIFR(incBody, maxField.makeRef()));
 192
 193         Stmt returnStmt = Jimple.v().newReturnStmt(l2);
 194         incBody.getUnits().add(Jimple.v().newIfStmt(Jimple.v().newLtExpr(l2, l3), returnStmt));
 195
 196         assign(incBody,  l4,                               Jimple.v().newShlExpr(l3, IntConstant.v(1)));
 197         assign(incBody,  newIFR(incBody, maxField.makeRef()), l4);
 198
 199
 200         // Finally, iterate over the Gladiator's fields, updating the $$inc method and Arena's zero-arg constructor as we go
 201
 202         for(Iterator it = sc.getFields().iterator(); it.hasNext();) {
 203             SootField f = (SootField)it.next();
 204             Type t      = getSliceElementType(f.getType());
 205             arena.addField(f = new SootField(getGladiatorName(sc) + "$$" + f.getName(), t.makeArrayType(), 0));
 206
 207             Expr newArr = Jimple.v().newNewArrayExpr(t, IntConstant.v(initialSize));
 208             Local newArrLocal = newLocal(arenaInitBody, f.getType());
 209             arenaInitBody.getUnits().addFirst(Jimple.v().newAssignStmt(newIFR(arenaInitBody, f.makeRef()), newArrLocal));
 210             arenaInitBody.getUnits().addFirst(Jimple.v().newAssignStmt(newArrLocal, newArr));
 211
 212             Local ll0 = newLocal(incBody, f.getType());
 213             Local ll = newLocal(incBody, f.getType());
 214             assign(incBody, ll0, newIFR(incBody,  f.makeRef()));
 215             assign(incBody, ll,  Jimple.v().newNewArrayExpr(t, l4));
 216
 217             List args = new LinkedList();
 218             args.add(ll0);
 219             args.add(IntConstant.v(0));
 220             args.add(ll);
 221             args.add(IntConstant.v(0));
 222             args.add(l3);
 223             incBody.getUnits().add(Jimple.v().newInvokeStmt(Jimple.v().newStaticInvokeExpr(arrayCopy, args)));
 224             assign(incBody, newIFR(incBody,  f.makeRef()), ll);
 225         }
 226
 227         for(Iterator it = sc.getMethods().iterator(); it.hasNext();) {
 228             SootMethod m = (SootMethod)it.next();
 229             if (!m.isConcrete()) continue;
 230             boolean doremove = true;
 231             Body mincBody = m.getActiveBody();
 232             if (implementsGladiator(m.getDeclaringClass()) && m.getName().equals("<init>")) {
 233                 doremove = false;
 234                 SootClass c = m.getDeclaringClass();
 235                 String name = /*c.getShortName().substring(c.getShortName().lastIndexOf('$')+1) + */"$init";
 236                 List li = m.getParameterTypes();
 237                 c.removeMethod(m);
 238                 SootMethod nm = new SootMethod(name, li, implementsGladiator(m.getReturnType()) ? IntType.v() : m.getReturnType());
 239                 JimpleBody bod = Jimple.v().newBody(nm);
 240                 bod.importBodyContentsFrom(m.getActiveBody());
 241                 nm.setActiveBody(bod);
 242                 m = nm;
 243                 mincBody = bod;
 244                 mincBody.getUnits().remove(((JimpleBody)mincBody).getFirstNonIdentityStmt());
 245                 mincBody.getUnits().remove(((JimpleBody)mincBody).getFirstNonIdentityStmt());
 246             } else {
 247                 System.out.println("examining " + sc.getName() + "." + m.getSignature());
 248                 m.retrieveActiveBody();
 249             }
 250             if (m.isStatic()) continue;
 251
 252             String name = sc.getShortName().substring(sc.getShortName().lastIndexOf('$')+1) + "$$" + m.getName();
 253             List list = new LinkedList();
 254             list.addAll(m.getParameterTypes());
 255             list.add(IntType.v());
 256             for(Iterator i = list.iterator(); i.hasNext();) System.out.println(i.next());
 257             SootMethod m2 = new SootMethod(name, list, m.getReturnType());
 258             getArenaForGladiator(sc).addMethod(m2);
 259
 260             JimpleBody ab = (JimpleBody)Jimple.v().newBody(m2);
 261             ab.importBodyContentsFrom(mincBody);
 262             m2.setActiveBody(ab);
 263             Local loc = Jimple.v().newLocal("tmpRef" + (tfr++), getArenaForGladiator(sc).getType());
 264             ab.getLocals().add(loc);
 265             // FIXME: insert assignment to this
 266
 267             for(Iterator z = ab.getLocals().iterator(); z.hasNext();) {
 268                 Local loc2 = (Local)z.next();
 269                 if (implementsGladiator(loc2.getType())) {
 270                     loc2.setType(IntType.v());
 271                 }
 272             }
 273
 274             Chain units = ab.getUnits();
 275             boolean touched = false;
 276             Local loc0 = Jimple.v().newLocal("tmpRef" + (tfr++), getArenaForGladiator(sc).getType());
 277             ab.getLocals().add(loc0);
 278             for(Iterator stmtIt = units.snapshotIterator(); stmtIt.hasNext();) {
 279                 Stmt s = (Stmt) stmtIt.next();
 280                 if (s instanceof IdentityStmt) {
 281                     IdentityStmt is = (IdentityStmt)s;
 282                     Local left = (Local)is.getLeftOp();
 283                     if (is.getRightOp() instanceof ThisRef) {
 284                         left.setType(IntType.v());
 285                         is.getRightOpBox().setValue(Jimple.v().newParameterRef(IntType.v(), m.getParameterCount()));
 286                         if (!touched) {
 287                             units.addFirst(Jimple.v().newIdentityStmt(loc0, Jimple.v().newThisRef(getArenaForGladiator(sc).getType())));
 288                             touched = true;
 289                         }
 290                     }
 291                 }
 292
 293                 for(Iterator i = s.getUseAndDefBoxes().iterator(); i.hasNext();) {
 294                     Object o = i.next();
 295                     if (o instanceof ValueBox) {
 296                         ValueBox vb = (ValueBox)o;
 297                         o = vb.getValue();
 298                         /*
 299                         if (o instanceof Local && implementsGladiator(((Local)o).getType())) {
 300                             System.out.println("thunking");
 301                             vb.setValue(loc0);
 302                         }
 303                         */
 304                         if (vb.getValue() instanceof ThisRef) {
 305                             System.out.println(s);
 306                             vb.setValue(loc);
 307                         }
 308                     }
 309                 }
 310
 311             }
 312
 313             if (doremove) sc.removeMethod(m);
 314
 315         }
 316         incBody.getUnits().add(returnStmt);
 317     }
 318
 319     // Operations performed on all classes ////////////////////////////////////////////////////////////////////////////
 320
 321     public void processClass(SootClass c) {
 322         for(Iterator it = c.getFields().iterator(); it.hasNext();) {
 323             SootField f = (SootField)it.next();
 324             Type t = f.getType();
 325             if (t instanceof RefType) {
 326                 RefType rt = (RefType)t;
 327                 SootClass sc = rt.getSootClass();
 328                 if (implementsGladiator(sc)) f.setType(IntType.v());
 329             } else if (t instanceof ArrayType) {
 330                 ArrayType at = (ArrayType)t;
 331                 t = at.getElementType();
 332                 if (!(t instanceof RefType)) continue;
 333                 RefType rt = (RefType)t;
 334                 SootClass sc = rt.getSootClass();
 335                 if (implementsGladiator(sc)) f.setType(IntType.v().makeArrayType());
 336             }
 337         }
 338
 339         List list = new LinkedList(); list.addAll(c.getMethods());
 340         for(Iterator it = list.iterator(); it.hasNext();) {
 341             SootMethod m = (SootMethod)it.next();
 342             Body b = null;
 343             if (m.getName().endsWith("$$inc")) continue;
 344             if (m.hasActiveBody()) b = processBody(m.getActiveBody(), c, m);
 345             List l2 = new LinkedList();
 346             List l = m.getParameterTypes();
 347             for(Iterator it2 = l.iterator(); it2.hasNext();) {
 348                 Type t = (Type)it2.next();
 349                 l2.add(implementsGladiator(t) ? IntType.v() : t);
 350             }
 351             Type t = m.getReturnType();
 352             if (implementsGladiator(t)) {
 353                 t = IntType.v();
 354                 if (m.hasActiveBody()) {
 355                     Body bod = m.getActiveBody();
 356                     for(Iterator stmtIt = bod.getUnits().snapshotIterator(); stmtIt.hasNext();) {
 357                         Stmt s = (Stmt) stmtIt.next();
 358                         if (s instanceof ReturnStmt) {
 359                             if (((ReturnStmt)s).getOp().getType() instanceof NullType) {
 360                                 ((ReturnStmt)s).getOpBox().setValue(IntConstant.v(-1));
 361                             }
 362                         }
 363                     }
 364                 }
 365             }
 366             String name = m.getName();
 367             SootMethod meth = new SootMethod(name, l2, implementsGladiator(t) ? IntType.v() : t, m.getModifiers());
 368             if (b != null) {
 369                 JimpleBody b2 = Jimple.v().newBody(meth);
 370                 b2.importBodyContentsFrom(b);
 371                 meth.setActiveBody(b2);
 372             }
 373             c.removeMethod(m);
 374             c.addMethod(meth);
 375         }
 376
 377     }
 378
 379     protected Body processBody(Body body, SootClass ownerClass, SootMethod smeth) {
 380         if (body instanceof JimpleBody) {
 381             JimpleBody b2 = Jimple.v().newBody(smeth);
 382             b2.importBodyContentsFrom(body);
 383             body = b2;
 384         }
 385         Chain units = body.getUnits();
 386         System.out.println("processBody("+body.getMethod()+")");
 387         for(Iterator it = body.getLocals().snapshotIterator(); it.hasNext();) {
 388             Local l = (Local)it.next();
 389             if (implementsGladiator(l.getType())) l.setType(IntType.v());
 390         }
 391         for(int qq=0; qq<2; qq++) for(Iterator stmtIt = units.snapshotIterator(); stmtIt.hasNext();) {
 392             Stmt s = (Stmt) stmtIt.next();
 393             if (s instanceof DefinitionStmt) {
 394                 DefinitionStmt ds = (DefinitionStmt)s;
 395                 if (ds.getLeftOp().getType() instanceof PrimType && ds.getRightOp().getType() instanceof NullType) {
 396                     ds.getRightOpBox().setValue(IntConstant.v(-1));
 397                 }
 398             }
 399             if (implementsGladiator(smeth.getReturnType()) && s instanceof ReturnStmt)
 400                 if (((ReturnStmt)s).getOp().getType() instanceof NullType)
 401                     ((ReturnStmt)s).getOpBox().setValue(IntConstant.v(-1));
 402             List l = s.getUseAndDefBoxes();
 403             for(Iterator it = l.iterator(); it.hasNext();) {
 404                 Object o = it.next();
 405                 if (o instanceof ValueBox) {
 406                     ValueBox vb = (ValueBox)o;
 407                     Value v = vb.getValue();
 408
 409                     if (v instanceof BinopExpr) {
 410                         BinopExpr boe = (BinopExpr)v;
 411                         Type t1 = boe.getOp1().getType();
 412                         Type t2 = boe.getOp2().getType();
 413                         if (t1 instanceof PrimType && t2 instanceof NullType) boe.setOp2(IntConstant.v(-1));
 414                         if (t2 instanceof PrimType && t1 instanceof NullType) boe.setOp1(IntConstant.v(-1));
 415                     }
 416
 417                     if (v instanceof NewExpr) {
 418                         NewExpr ne = (NewExpr)v;
 419                         if (implementsGladiator(ne.getBaseType())) {
 420                             SootClass sc = ((RefType)ne.getBaseType()).getSootClass();
 421                             SootClass arena = getArenaForGladiator(sc);
 422                             String incFuncName = sc.getShortName().substring(sc.getShortName().lastIndexOf('$')+1) + "$$inc";
 423                             SootMethodRef smr = Scene.v().makeMethodRef(arena, incFuncName, new LinkedList(), IntType.v(), false);
 424                             Expr invokeExpr = Jimple.v().newSpecialInvokeExpr(body.getThisLocal(), smr);
 425                             Local ll = viaLocal(invokeExpr, body, s);
 426                             vb.setValue(ll);
 427                             v = ll;
 428                             continue;
 429                         }
 430                     } else
 431
 432                     if (v instanceof InvokeExpr) {
 433                         InvokeExpr ie = (InvokeExpr)v;
 434                         SootMethodRef mr = ie.getMethodRef();
 435                         String name = mr.name();
 436                         if (v instanceof InstanceInvokeExpr && implementsGladiator(mr.declaringClass())) {
 437                             InstanceInvokeExpr iie = (InstanceInvokeExpr)v;
 438                             List li = new LinkedList();
 439                             li.addAll(iie.getArgs());
 440                             LinkedList pl = new LinkedList();
 441                             for(Iterator it2 = mr.parameterTypes().iterator(); it2.hasNext();) {
 442                                 Type t = (Type)it2.next();
 443                                 pl.add(implementsGladiator(t) ? IntType.v() : t);
 444                             }
 445                             if (mr.name().equals("<init>") && implementsGladiator(mr.declaringClass())) {
 446                                 name = "$init";
 447                                 //li.remove(0);
 448                                 //pl.remove(0);
 449                             }
 450                             pl.add(IntType.v());
 451                             li.add(viaLocal(iie.getBase(),body,s));
 452                             SootClass sc = mr.declaringClass();
 453                             name = sc.getShortName().substring(sc.getShortName().lastIndexOf('$')+1) + "$$" + name;
 454                             mr = Scene.v().makeMethodRef(getArenaForGladiator(sc),
 455                                                          name,
 456                                                          pl,
 457                                                          implementsGladiator(mr.returnType()) ? IntType.v() : mr.returnType(),
 458                                                          false);
 459                             ie = Jimple.v().newVirtualInvokeExpr(body.getThisLocal(), mr, li);
 460                             vb.setValue(v = ie);
 461
 462                         } else if (!(v instanceof StaticInvokeExpr)) {
 463                             List l0 = mr.parameterTypes();
 464                             List l2 = new LinkedList();
 465                             for(Iterator it2 = l0.iterator(); it2.hasNext();) {
 466                                 Type t = (Type)it2.next();
 467                                 l2.add(implementsGladiator(t) ? IntType.v() : t);
 468                             }
 469                             mr = Scene.v().makeMethodRef(mr.declaringClass(),
 470                                                          mr.name(),
 471                                                          l2,
 472                                                          implementsGladiator(mr.returnType()) ? IntType.v() : mr.returnType(),
 473                                                          mr.isStatic());
 474                             ie.setMethodRef(mr);
 475                             vb.setValue(v = ie);
 476                         }
 477
 478                         for(int i=0; i<ie.getArgCount(); i++) {
 479                             ValueBox b = ie.getArgBox(i);
 480                             Value val = b.getValue();
 481                             if (mr.parameterType(i) instanceof RefType && val.getType() instanceof PrimType) {
 482                                 SootClass intClass = Scene.v().getSootClass("java.lang.Integer");
 483                                 List typelist = new LinkedList();
 484                                 typelist.add(IntType.v());
 485                                 SootMethod intMethod = intClass.getMethod("<init>", typelist);
 486                                 Local loc = viaLocal(Jimple.v().newNewExpr(RefType.v(intClass)), body, s);
 487                                 List list = new LinkedList();
 488                                 list.add(val);
 489                                 units.insertBefore(Jimple.v().newInvokeStmt(Jimple.v().newSpecialInvokeExpr(loc,
 490                                                                                                             intMethod.makeRef(),
 491                                                                                                             list)),
 492                                                    s);
 493                                 b.setValue(loc);
 494                             }
 495                             if (val != null && val.getType() instanceof NullType && mr.parameterType(i) instanceof IntType) {
 496                                 b.setValue(IntConstant.v(-1));
 497                             }
 498                         }
 499
 500
 501                     } else if (v instanceof CastExpr) {
 502                         CastExpr ce = (CastExpr)v;
 503                         if (implementsGladiator(ce.getCastType())) {
 504                             SootClass arena = getArenaForGladiator(((RefType)ce.getCastType()).getSootClass());
 505                             SootClass ic = Scene.v().getSootClass("java.lang.Integer");
 506                             ce.setCastType(ic.getType());
 507
 508                             Local l1 = Jimple.v().newLocal("tmpRef" + (tfr++), ic.getType()); body.getLocals().add(l1);
 509                             Local l2 = Jimple.v().newLocal("tmpRef" + (tfr++), IntType.v()); body.getLocals().add(l2);
 510
 511                             Stmt s2 = Jimple.v().newAssignStmt(l1, Jimple.v().newCastExpr(ce.getOp(), ic.getType()));
 512                             body.getUnits().insertBefore(s2, s);
 513
 514                             Stmt isNull = Jimple.v().newAssignStmt(l2, IntConstant.v(-1));
 515                             body.getUnits().insertAfter(isNull, s2);
 516
 517                             Stmt ifStmt = Jimple.v().newIfStmt(Jimple.v().newEqExpr(l1, NullConstant.v()), s);
 518                             body.getUnits().insertAfter(ifStmt, isNull);
 519
 520                             SootMethodRef mr = Scene.v().makeMethodRef(ic, "intValue", new LinkedList(), IntType.v(), false);
 521                             Stmt isNotNull =
 522                                 Jimple.v().newAssignStmt(l2, Jimple.v().newVirtualInvokeExpr(l1, mr, new LinkedList()));
 523                             body.getUnits().insertAfter(isNotNull, ifStmt);
 524
 525                             vb.setValue(l2);
 526                             qq = 0;  // ???
 527                             break;
 528                         }
 529
 530                     } else if (v instanceof InstanceFieldRef) {
 531                         InstanceFieldRef ifr = (InstanceFieldRef)v;
 532                         SootFieldRef fr = ifr.getFieldRef();
 533                         Type t = fr.type();
 534                         if (implementsGladiator(fr.declaringClass()) && fr.name().equals("this$0")) {
 535                             System.out.println("******************");
 536                             vb.setValue(body.getThisLocal());
 537                             System.out.println("s is " + s);
 538                         } else if (implementsGladiator(fr.declaringClass())) {
 539                             SootClass arena = getArenaForGladiator(fr.declaringClass());
 540                             InstanceFieldRef sfr = newIFR(body,  getSliceForField(fr));
 541                             vb.setValue(Jimple.v().newArrayRef(viaLocal(sfr, body, s), ifr.getBase()));
 542                         }
 543                         if ((t instanceof RefType) && implementsGladiator(((RefType)t).getSootClass())) {
 544                             SootClass tc = ((RefType)t).getSootClass();
 545                             SootClass arena = getArenaForGladiator(tc);
 546                             ifr.setFieldRef(Scene.v().makeFieldRef(arena, fr.name(), IntType.v(), false));
 547                         }
 548                     }
 549
 550                 }
 551             }
 552         }
 553         body.validate();
 554         return body;
 555     }
 556 }