Robust/src/IR/Flat/BuildCode.java

   1 package IR.Flat;
   2 import IR.Tree.FlagExpressionNode;
   3 import IR.Tree.DNFFlag;
   4 import IR.Tree.DNFFlagAtom;
   5 import IR.*;
   6 import java.util.*;
   7 import java.io.*;
   8
   9 public class BuildCode {
  10     State state;
  11     Hashtable temptovar;
  12     Hashtable paramstable;
  13     Hashtable tempstable;
  14     Hashtable fieldorder;
  15     Hashtable flagorder;
  16     int tag=0;
  17     String localsprefix="___locals___";
  18     String paramsprefix="___params___";
  19     public static boolean GENERATEPRECISEGC=false;
  20     public static String PREFIX="";
  21     public static String arraytype="ArrayObject";
  22     Virtual virtualcalls;
  23     TypeUtil typeutil;
  24     private int maxtaskparams=0;
  25     ClassDescriptor[] cdarray;
  26     TypeDescriptor[] arraytable;
  27
  28     public BuildCode(State st, Hashtable temptovar, TypeUtil typeutil) {
  29         state=st;
  30         this.temptovar=temptovar;
  31         paramstable=new Hashtable();
  32         tempstable=new Hashtable();
  33         fieldorder=new Hashtable();
  34         flagorder=new Hashtable();
  35         this.typeutil=typeutil;
  36         virtualcalls=new Virtual(state);
  37     }
  38
  39     /** The buildCode method outputs C code for all the methods.  The Flat
  40      * versions of the methods must already be generated and stored in
  41      * the State object. */
  42
  43     public void buildCode() {
  44         /* Create output streams to write to */
  45         PrintWriter outclassdefs=null;
  46         PrintWriter outstructs=null;
  47         PrintWriter outrepairstructs=null;
  48         PrintWriter outmethodheader=null;
  49         PrintWriter outmethod=null;
  50         PrintWriter outvirtual=null;
  51         PrintWriter outtask=null;
  52         PrintWriter outtaskdefs=null;
  53
  54         try {
  55             OutputStream str=new FileOutputStream(PREFIX+"structdefs.h");
  56             outstructs=new java.io.PrintWriter(str, true);
  57             str=new FileOutputStream(PREFIX+"methodheaders.h");
  58             outmethodheader=new java.io.PrintWriter(str, true);
  59             str=new FileOutputStream(PREFIX+"classdefs.h");
  60             outclassdefs=new java.io.PrintWriter(str, true);
  61             str=new FileOutputStream(PREFIX+"methods.c");
  62             outmethod=new java.io.PrintWriter(str, true);
  63             str=new FileOutputStream(PREFIX+"virtualtable.h");
  64             outvirtual=new java.io.PrintWriter(str, true);
  65             if (state.TASK) {
  66                 str=new FileOutputStream(PREFIX+"task.h");
  67                 outtask=new java.io.PrintWriter(str, true);
  68                 str=new FileOutputStream(PREFIX+"taskdefs.c");
  69                 outtaskdefs=new java.io.PrintWriter(str, true);
  70             }
  71             if (state.structfile!=null) {
  72                 str=new FileOutputStream(PREFIX+state.structfile+".struct");
  73                 outrepairstructs=new java.io.PrintWriter(str, true);
  74             }
  75         } catch (Exception e) {
  76             e.printStackTrace();
  77             System.exit(-1);
  78         }
  79
  80         /* Build the virtual dispatch tables */
  81         buildVirtualTables(outvirtual);
  82
  83         /* Output includes */
  84         outstructs.println("#include \"classdefs.h\"");
  85         outmethodheader.println("#include \"structdefs.h\"");
  86
  87         /* Output types for short array and string */
  88         outstructs.println("#define STRINGARRAYTYPE "+
  89                            (state.getArrayNumber(
  90                                                  (new TypeDescriptor(typeutil.getClass(TypeUtil.StringClass))).makeArray(state))+state.numClasses()));
  91
  92         outstructs.println("#define STRINGTYPE "+typeutil.getClass(TypeUtil.StringClass).getId());
  93         outstructs.println("#define CHARARRAYTYPE "+
  94                            (state.getArrayNumber((new TypeDescriptor(TypeDescriptor.CHAR)).makeArray(state))+state.numClasses()));
  95         outstructs.println("#define NUMCLASSES "+state.numClasses());
  96         if (state.TASK)
  97             outstructs.println("#define STARTUPTYPE "+typeutil.getClass(TypeUtil.StartupClass).getId());
  98
  99         // Output the C class declarations
 100         // These could mutually reference each other
 101         outclassdefs.println("struct "+arraytype+";");
 102
 103         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 104         while(it.hasNext()) {
 105             ClassDescriptor cn=(ClassDescriptor)it.next();
 106             outclassdefs.println("struct "+cn.getSafeSymbol()+";");
 107         }
 108         outclassdefs.println("");
 109         {
 110             //Print out definition for array type
 111             outclassdefs.println("struct "+arraytype+" {");
 112             outclassdefs.println("  int type;");
 113             outclassdefs.println("  int flag;");
 114
 115             if (state.TASK) {
 116                 outclassdefs.println("  void * flagptr;");
 117             }
 118             printClassStruct(typeutil.getClass(TypeUtil.ObjectClass), outclassdefs);
 119             outclassdefs.println("  int ___length___;");
 120             outclassdefs.println("};\n");
 121
 122             if (state.TASK) {
 123             //Print out definitions for task types
 124                 outtask.println("struct parameterdescriptor {");
 125                 outtask.println("int type;");
 126                 outtask.println("int numberterms;");
 127                 outtask.println("int *intarray;");
 128                 outtask.println("void * queue;");
 129                 outtask.println("};");
 130
 131                 outtask.println("struct taskdescriptor {");
 132                 outtask.println("void * taskptr;");
 133                 outtask.println("int numParameters;");
 134                 outtask.println("struct parameterdescriptor **descriptorarray;");
 135                 outtask.println("char * name;");
 136                 outtask.println("};");
 137                 outtask.println("extern struct taskdescriptor * taskarray[];");
 138                 outtask.println("extern numtasks;");
 139             }
 140         }
 141
 142         // Output function prototypes and structures for parameters
 143         it=state.getClassSymbolTable().getDescriptorsIterator();
 144         while(it.hasNext()) {
 145             ClassDescriptor cn=(ClassDescriptor)it.next();
 146             generateCallStructs(cn, outclassdefs, outstructs, outmethodheader);
 147         }
 148
 149
 150         if (state.TASK) {
 151             /* Map flags to integers */
 152             it=state.getClassSymbolTable().getDescriptorsIterator();
 153             while(it.hasNext()) {
 154                 ClassDescriptor cn=(ClassDescriptor)it.next();
 155                 mapFlags(cn);
 156             }
 157             /* Generate Tasks */
 158             generateTaskStructs(outstructs, outmethodheader);
 159         }
 160
 161         outmethodheader.close();
 162
 163         /* Build the actual methods */
 164         outmethod.println("#include \"methodheaders.h\"");
 165         outmethod.println("#include \"virtualtable.h\"");
 166         outmethod.println("#include <runtime.h>");
 167         if (state.main!=null) {
 168             outmethod.println("#include <string.h>");
 169         }
 170
 171         if (state.CONSCHECK) {
 172             outmethod.println("#include \"checkers.h\"");
 173         }
 174         outclassdefs.println("extern int classsize[];");
 175         outclassdefs.println("extern int hasflags[];");
 176         outclassdefs.println("extern int * pointerarray[];");
 177         outclassdefs.println("extern int supertypes[];");
 178
 179         //Store the sizes of classes & array elements
 180         generateSizeArray(outmethod);
 181
 182         //Store table of supertypes
 183         generateSuperTypeTable(outmethod);
 184
 185         //Store the layout of classes
 186         generateLayoutStructs(outmethod);
 187
 188         /* Generate code for methods */
 189         Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
 190         while(classit.hasNext()) {
 191             ClassDescriptor cn=(ClassDescriptor)classit.next();
 192             Iterator methodit=cn.getMethods();
 193             while(methodit.hasNext()) {
 194                 /* Classify parameters */
 195                 MethodDescriptor md=(MethodDescriptor)methodit.next();
 196                 FlatMethod fm=state.getMethodFlat(md);
 197                 if (!md.getModifiers().isNative())
 198                     generateFlatMethod(fm,outmethod);
 199             }
 200         }
 201
 202         if (state.TASK) {
 203             /* Compile task based program */
 204             outtaskdefs.println("#include \"task.h\"");
 205             outtaskdefs.println("#include \"methodheaders.h\"");
 206             Iterator taskit=state.getTaskSymbolTable().getDescriptorsIterator();
 207             while(taskit.hasNext()) {
 208                 TaskDescriptor td=(TaskDescriptor)taskit.next();
 209                 FlatMethod fm=state.getMethodFlat(td);
 210                 generateFlatMethod(fm, outmethod);
 211                 generateTaskDescriptor(outtaskdefs, td);
 212             }
 213
 214             {
 215                 //Output task descriptors
 216                 taskit=state.getTaskSymbolTable().getDescriptorsIterator();
 217                 outtaskdefs.println("struct taskdescriptor * taskarray[]= {");
 218                 boolean first=true;
 219                 while(taskit.hasNext()) {
 220                     TaskDescriptor td=(TaskDescriptor)taskit.next();
 221                     if (first)
 222                         first=false;
 223                     else
 224                         outtaskdefs.println(",");
 225                     outtaskdefs.print("&task_"+td.getSafeSymbol());
 226                 }
 227                 outtaskdefs.println("};");
 228             }
 229
 230             outtaskdefs.println("int numtasks="+state.getTaskSymbolTable().getValueSet().size()+";");
 231
 232         } else if (state.main!=null) {
 233             /* Generate main method */
 234             outmethod.println("int main(int argc, const char *argv[]) {");
 235             outmethod.println("  int i;");
 236             if (GENERATEPRECISEGC) {
 237                 outmethod.println("  struct ArrayObject * stringarray=allocate_newarray(NULL, STRINGARRAYTYPE, argc-1);");
 238             } else {
 239                 outmethod.println("  struct ArrayObject * stringarray=allocate_newarray(STRINGARRAYTYPE, argc-1);");
 240             }
 241             outmethod.println("  for(i=1;i<argc;i++) {");
 242             outmethod.println("    int length=strlen(argv[i]);");
 243             if (GENERATEPRECISEGC) {
 244                 outmethod.println("    struct ___String___ *newstring=NewString(NULL, argv[i], length);");
 245             } else {
 246                 outmethod.println("    struct ___String___ *newstring=NewString(argv[i], length);");
 247             }
 248             outmethod.println("    ((void **)(((char *)& stringarray->___length___)+sizeof(int)))[i-1]=newstring;");
 249             outmethod.println("  }");
 250
 251
 252             ClassDescriptor cd=typeutil.getClass(state.main);
 253             Set mainset=cd.getMethodTable().getSet("main");
 254             for(Iterator mainit=mainset.iterator();mainit.hasNext();) {
 255                 MethodDescriptor md=(MethodDescriptor)mainit.next();
 256                 if (md.numParameters()!=1)
 257                     continue;
 258                 if (md.getParameter(0).getType().getArrayCount()!=1)
 259                     continue;
 260                 if (!md.getParameter(0).getType().getSymbol().equals("String"))
 261                     continue;
 262
 263                 if (!md.getModifiers().isStatic())
 264                     throw new Error("Error: Non static main");
 265                 outmethod.println("   {");
 266                 if (GENERATEPRECISEGC) {
 267                     outmethod.print("       struct "+cd.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params __parameterlist__={");
 268                     outmethod.println("1, NULL,"+"stringarray};");
 269                     outmethod.println("     "+cd.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(& __parameterlist__);");
 270                 } else
 271                     outmethod.println("     "+cd.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(stringarray);");
 272                 outmethod.println("   }");
 273                 break;
 274             }
 275             outmethod.println("}");
 276         }
 277         if (state.TASK)
 278             outstructs.println("#define MAXTASKPARAMS "+maxtaskparams);
 279
 280
 281         /* Output structure definitions for repair tool */
 282         if (state.structfile!=null) {
 283             buildRepairStructs(outrepairstructs);
 284             outrepairstructs.close();
 285         }
 286
 287         outstructs.close();
 288         outmethod.close();
 289     }
 290
 291     private int maxcount=0;
 292
 293     private void buildRepairStructs(PrintWriter outrepairstructs) {
 294         Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
 295         while(classit.hasNext()) {
 296             ClassDescriptor cn=(ClassDescriptor)classit.next();
 297             outrepairstructs.println("structure "+cn.getSymbol()+" {");
 298             outrepairstructs.println("  int __type__;");
 299             if (state.TASK) {
 300                 outrepairstructs.println("  int __flag__;");
 301                 outrepairstructs.println("  int __flagptr__;");
 302             }
 303             printRepairStruct(cn, outrepairstructs);
 304             outrepairstructs.println("}\n");
 305         }
 306
 307         for(int i=0;i<state.numArrays();i++) {
 308             TypeDescriptor tdarray=arraytable[i];
 309             TypeDescriptor tdelement=tdarray.dereference();
 310             outrepairstructs.println("structure "+arraytype+"_"+state.getArrayNumber(tdarray)+" {");
 311             outrepairstructs.println("  int __type__;");
 312             printRepairStruct(typeutil.getClass(TypeUtil.ObjectClass), outrepairstructs);
 313             outrepairstructs.println("  int length;");
 314             /*
 315               // Need to add support to repair tool for this
 316               if (tdelement.isClass()||tdelement.isArray())
 317                 outrepairstructs.println("  "+tdelement.getRepairSymbol()+" * elem[this.length];");
 318             else
 319                 outrepairstructs.println("  "+tdelement.getRepairSymbol()+" elem[this.length];");
 320             */
 321             outrepairstructs.println("}\n");
 322         }
 323
 324     }
 325
 326     private void printRepairStruct(ClassDescriptor cn, PrintWriter output) {
 327         ClassDescriptor sp=cn.getSuperDesc();
 328         if (sp!=null)
 329             printRepairStruct(sp, output);
 330
 331         Vector fields=(Vector)fieldorder.get(cn);
 332
 333         for(int i=0;i<fields.size();i++) {
 334             FieldDescriptor fd=(FieldDescriptor)fields.get(i);
 335             if (fd.getType().isArray()) {
 336                 output.println("  "+arraytype+"_"+ state.getArrayNumber(fd.getType()) +" * "+fd.getSymbol()+";");
 337             } else if (fd.getType().isClass())
 338                 output.println("  "+fd.getType().getRepairSymbol()+" * "+fd.getSymbol()+";");
 339             else
 340                 output.println("  "+fd.getType().getRepairSymbol()+" "+fd.getSymbol()+";");
 341         }
 342     }
 343
 344     /** This method outputs TaskDescriptor information */
 345     void generateTaskDescriptor(PrintWriter output, TaskDescriptor task) {
 346         for (int i=0;i<task.numParameters();i++) {
 347             VarDescriptor param_var=task.getParameter(i);
 348             TypeDescriptor param_type=task.getParamType(i);
 349             FlagExpressionNode param_flag=task.getFlag(param_var);
 350             DNFFlag dflag=param_flag.getDNF();
 351
 352             Hashtable flags=(Hashtable)flagorder.get(param_type.getClassDesc());
 353
 354             output.println("int parameterdnf_"+i+"_"+task.getSafeSymbol()+"[]={");
 355             for(int j=0;j<dflag.size();j++) {
 356                 if (j!=0)
 357                     output.println(",");
 358                 Vector term=dflag.get(j);
 359                 int andmask=0;
 360                 int checkmask=0;
 361                 for(int k=0;k<term.size();k++) {
 362                     DNFFlagAtom dfa=(DNFFlagAtom)term.get(k);
 363                     FlagDescriptor fd=dfa.getFlag();
 364                     boolean negated=dfa.getNegated();
 365                     int flagid=1<<((Integer)flags.get(fd)).intValue();
 366                     andmask|=flagid;
 367                     if (!negated)
 368                         checkmask|=flagid;
 369                 }
 370                 output.print("0x"+Integer.toHexString(andmask)+", 0x"+Integer.toHexString(checkmask));
 371             }
 372             output.println("};");
 373
 374             output.println("struct parameterdescriptor parameter_"+i+"_"+task.getSafeSymbol()+"={");
 375             output.println("/* type */"+param_type.getClassDesc().getId()+",");
 376             output.println("/* number of DNF terms */"+dflag.size()+",");
 377             output.println("parameterdnf_"+i+"_"+task.getSafeSymbol()+",");
 378             output.println("0");
 379             output.println("};");
 380         }
 381
 382
 383         output.println("struct parameterdescriptor * parameterdescriptors_"+task.getSafeSymbol()+"[] = {");
 384         for (int i=0;i<task.numParameters();i++) {
 385             if (i!=0)
 386                 output.println(",");
 387             output.print("&parameter_"+i+"_"+task.getSafeSymbol());
 388         }
 389         output.println("};");
 390
 391         output.println("struct taskdescriptor task_"+task.getSafeSymbol()+"={");
 392         output.println("&"+task.getSafeSymbol()+",");
 393         output.println("/* number of parameters */" +task.numParameters() + ",");
 394         output.println("parameterdescriptors_"+task.getSafeSymbol()+",");
 395         output.println("\""+task.getSymbol()+"\"");
 396         output.println("};");
 397     }
 398
 399
 400     /** The buildVirtualTables method outputs the virtual dispatch
 401      * tables for methods. */
 402
 403     private void buildVirtualTables(PrintWriter outvirtual) {
 404         Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
 405         while(classit.hasNext()) {
 406             ClassDescriptor cd=(ClassDescriptor)classit.next();
 407             if (virtualcalls.getMethodCount(cd)>maxcount)
 408                 maxcount=virtualcalls.getMethodCount(cd);
 409         }
 410         MethodDescriptor[][] virtualtable=new MethodDescriptor[state.numClasses()+state.numArrays()][maxcount];
 411
 412         /* Fill in virtual table */
 413         classit=state.getClassSymbolTable().getDescriptorsIterator();
 414         while(classit.hasNext()) {
 415             ClassDescriptor cd=(ClassDescriptor)classit.next();
 416             fillinRow(cd, virtualtable, cd.getId());
 417         }
 418
 419         ClassDescriptor objectcd=typeutil.getClass(TypeUtil.ObjectClass);
 420         Iterator arrayit=state.getArrayIterator();
 421         while(arrayit.hasNext()) {
 422             TypeDescriptor td=(TypeDescriptor)arrayit.next();
 423             int id=state.getArrayNumber(td);
 424             fillinRow(objectcd, virtualtable, id+state.numClasses());
 425         }
 426
 427         outvirtual.print("void * virtualtable[]={");
 428         boolean needcomma=false;
 429         for(int i=0;i<state.numClasses()+state.numArrays();i++) {
 430             for(int j=0;j<maxcount;j++) {
 431                 if (needcomma)
 432                     outvirtual.print(", ");
 433                 if (virtualtable[i][j]!=null) {
 434                     MethodDescriptor md=virtualtable[i][j];
 435                     outvirtual.print("& "+md.getClassDesc().getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor());
 436                 } else {
 437                     outvirtual.print("0");
 438                 }
 439                 needcomma=true;
 440             }
 441             outvirtual.println("");
 442         }
 443         outvirtual.println("};");
 444         outvirtual.close();
 445     }
 446
 447     private void fillinRow(ClassDescriptor cd, MethodDescriptor[][] virtualtable, int rownum) {
 448         /* Get inherited methods */
 449         if (cd.getSuperDesc()!=null)
 450             fillinRow(cd.getSuperDesc(), virtualtable, rownum);
 451         /* Override them with our methods */
 452         for(Iterator it=cd.getMethods();it.hasNext();) {
 453             MethodDescriptor md=(MethodDescriptor)it.next();
 454             if (md.isStatic()||md.getReturnType()==null)
 455                 continue;
 456             int methodnum=virtualcalls.getMethodNumber(md);
 457             virtualtable[rownum][methodnum]=md;
 458         }
 459     }
 460
 461     /** Generate array that contains the sizes of class objects.  The
 462      * object allocation functions in the runtime use this
 463      * information. */
 464
 465     private void generateSizeArray(PrintWriter outclassdefs) {
 466         outclassdefs.print("int classsize[]={");
 467         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 468         cdarray=new ClassDescriptor[state.numClasses()];
 469         while(it.hasNext()) {
 470             ClassDescriptor cd=(ClassDescriptor)it.next();
 471             cdarray[cd.getId()]=cd;
 472         }
 473         boolean needcomma=false;
 474         for(int i=0;i<state.numClasses();i++) {
 475             if (needcomma)
 476                 outclassdefs.print(", ");
 477             outclassdefs.print("sizeof(struct "+cdarray[i].getSafeSymbol()+")");
 478             needcomma=true;
 479         }
 480
 481         arraytable=new TypeDescriptor[state.numArrays()];
 482
 483         Iterator arrayit=state.getArrayIterator();
 484         while(arrayit.hasNext()) {
 485             TypeDescriptor td=(TypeDescriptor)arrayit.next();
 486             int id=state.getArrayNumber(td);
 487             arraytable[id]=td;
 488         }
 489
 490         for(int i=0;i<state.numArrays();i++) {
 491             if (needcomma)
 492                 outclassdefs.print(", ");
 493             TypeDescriptor tdelement=arraytable[i].dereference();
 494             if (tdelement.isArray()||tdelement.isClass())
 495                 outclassdefs.print("sizeof(void *)");
 496             else
 497                 outclassdefs.print("sizeof("+tdelement.getSafeSymbol()+")");
 498             needcomma=true;
 499         }
 500
 501         outclassdefs.println("};");
 502     }
 503
 504     /** Constructs params and temp objects for each method or task.
 505      * These objects tell the compiler which temps need to be
 506      * allocated.  */
 507
 508     private void generateTempStructs(FlatMethod fm) {
 509         MethodDescriptor md=fm.getMethod();
 510         TaskDescriptor task=fm.getTask();
 511
 512         ParamsObject objectparams=md!=null?new ParamsObject(md,tag++):new ParamsObject(task, tag++);
 513         if (md!=null)
 514             paramstable.put(md, objectparams);
 515         else
 516             paramstable.put(task, objectparams);
 517
 518         for(int i=0;i<fm.numParameters();i++) {
 519             TempDescriptor temp=fm.getParameter(i);
 520             TypeDescriptor type=temp.getType();
 521             if ((type.isPtr()||type.isArray())&&GENERATEPRECISEGC)
 522                 objectparams.addPtr(temp);
 523             else
 524                 objectparams.addPrim(temp);
 525         }
 526
 527         TempObject objecttemps=md!=null?new TempObject(objectparams,md,tag++):new TempObject(objectparams, task, tag++);
 528         if (md!=null)
 529             tempstable.put(md, objecttemps);
 530         else
 531             tempstable.put(task, objecttemps);
 532
 533         for(Iterator nodeit=fm.getNodeSet().iterator();nodeit.hasNext();) {
 534             FlatNode fn=(FlatNode)nodeit.next();
 535             TempDescriptor[] writes=fn.writesTemps();
 536             for(int i=0;i<writes.length;i++) {
 537                 TempDescriptor temp=writes[i];
 538                 TypeDescriptor type=temp.getType();
 539                 if ((type.isPtr()||type.isArray())&&GENERATEPRECISEGC)
 540                     objecttemps.addPtr(temp);
 541                 else
 542                     objecttemps.addPrim(temp);
 543             }
 544         }
 545     }
 546
 547     private void generateLayoutStructs(PrintWriter output) {
 548         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 549         while(it.hasNext()) {
 550             ClassDescriptor cn=(ClassDescriptor)it.next();
 551             output.println("int "+cn.getSafeSymbol()+"_pointers[]={");
 552             Iterator allit=cn.getFieldTable().getAllDescriptorsIterator();
 553             int count=0;
 554             while(allit.hasNext()) {
 555                 FieldDescriptor fd=(FieldDescriptor)allit.next();
 556                 TypeDescriptor type=fd.getType();
 557                 if (type.isPtr()||type.isArray())
 558                     count++;
 559             }
 560             output.print(count);
 561             allit=cn.getFieldTable().getAllDescriptorsIterator();
 562             while(allit.hasNext()) {
 563                 FieldDescriptor fd=(FieldDescriptor)allit.next();
 564                 TypeDescriptor type=fd.getType();
 565                 if (type.isPtr()||type.isArray()) {
 566                     output.println(",");
 567                     output.print("((int)&(((struct "+cn.getSafeSymbol() +" *)0)->"+fd.getSafeSymbol()+"))");
 568                 }
 569             }
 570             output.println("};");
 571         }
 572         output.println("int * pointerarray[]={");
 573         boolean needcomma=false;
 574         for(int i=0;i<state.numClasses();i++) {
 575             ClassDescriptor cn=cdarray[i];
 576             if (needcomma)
 577                 output.println(",");
 578             needcomma=true;
 579             output.print(cn.getSafeSymbol()+"_pointers");
 580         }
 581
 582         for(int i=0;i<state.numArrays();i++) {
 583             if (needcomma)
 584                 output.println(", ");
 585             TypeDescriptor tdelement=arraytable[i].dereference();
 586             if (tdelement.isArray()||tdelement.isClass())
 587                 output.print("((int *)1)");
 588             else
 589                 output.print("0");
 590             needcomma=true;
 591         }
 592
 593         output.println("};");
 594         needcomma=false;
 595         output.println("int hasflags[]={");
 596         for(int i=0;i<state.numClasses();i++) {
 597             ClassDescriptor cn=cdarray[i];
 598             if (needcomma)
 599                 output.println(", ");
 600             needcomma=true;
 601             if (cn.hasFlags())
 602                 output.print("1");
 603             else
 604                 output.print("0");
 605         }
 606         output.println("};");
 607     }
 608
 609     /** Print out table to give us supertypes */
 610     private void generateSuperTypeTable(PrintWriter output) {
 611         output.println("int supertypes[]={");
 612         boolean needcomma=false;
 613         for(int i=0;i<state.numClasses();i++) {
 614             ClassDescriptor cn=cdarray[i];
 615             if (needcomma)
 616                 output.println(",");
 617             needcomma=true;
 618             if (cn.getSuperDesc()!=null) {
 619                 ClassDescriptor cdsuper=cn.getSuperDesc();
 620                 output.print(cdsuper.getId());
 621             } else
 622                 output.print("-1");
 623         }
 624         output.println("};");
 625     }
 626
 627     /** Force consistent field ordering between inherited classes. */
 628
 629     private void printClassStruct(ClassDescriptor cn, PrintWriter classdefout) {
 630         ClassDescriptor sp=cn.getSuperDesc();
 631         if (sp!=null)
 632             printClassStruct(sp, classdefout);
 633
 634         if (!fieldorder.containsKey(cn)) {
 635             Vector fields=new Vector();
 636             fieldorder.put(cn,fields);
 637             Iterator fieldit=cn.getFields();
 638             while(fieldit.hasNext()) {
 639                 FieldDescriptor fd=(FieldDescriptor)fieldit.next();
 640                 if (sp==null||!sp.getFieldTable().contains(fd.getSymbol()))
 641                     fields.add(fd);
 642             }
 643         }
 644         Vector fields=(Vector)fieldorder.get(cn);
 645
 646         for(int i=0;i<fields.size();i++) {
 647             FieldDescriptor fd=(FieldDescriptor)fields.get(i);
 648             if (fd.getType().isClass()||fd.getType().isArray())
 649                 classdefout.println("  struct "+fd.getType().getSafeSymbol()+" * "+fd.getSafeSymbol()+";");
 650             else
 651                 classdefout.println("  "+fd.getType().getSafeSymbol()+" "+fd.getSafeSymbol()+";");
 652         }
 653     }
 654
 655
 656     /* Map flags to integers consistently between inherited
 657      * classes. */
 658
 659     private void mapFlags(ClassDescriptor cn) {
 660         ClassDescriptor sp=cn.getSuperDesc();
 661         if (sp!=null)
 662             mapFlags(sp);
 663         int max=0;
 664         if (!flagorder.containsKey(cn)) {
 665             Hashtable flags=new Hashtable();
 666             flagorder.put(cn,flags);
 667             if (sp!=null) {
 668                 Hashtable superflags=(Hashtable)flagorder.get(sp);
 669                 Iterator superflagit=superflags.keySet().iterator();
 670                 while(superflagit.hasNext()) {
 671                     FlagDescriptor fd=(FlagDescriptor)superflagit.next();
 672                     Integer number=(Integer)superflags.get(fd);
 673                     flags.put(fd, number);
 674                     if ((number.intValue()+1)>max)
 675                         max=number.intValue()+1;
 676                 }
 677             }
 678
 679             Iterator flagit=cn.getFlags();
 680             while(flagit.hasNext()) {
 681                 FlagDescriptor fd=(FlagDescriptor)flagit.next();
 682                 if (sp==null||!sp.getFlagTable().contains(fd.getSymbol()))
 683                     flags.put(fd, new Integer(max++));
 684             }
 685         }
 686     }
 687
 688
 689     /** This function outputs (1) structures that parameters are
 690      * passed in (when PRECISE GC is enabled) and (2) function
 691      * prototypes for the methods */
 692
 693     private void generateCallStructs(ClassDescriptor cn, PrintWriter classdefout, PrintWriter output, PrintWriter headersout) {
 694         /* Output class structure */
 695         classdefout.println("struct "+cn.getSafeSymbol()+" {");
 696         classdefout.println("  int type;");
 697         classdefout.println("  int flag;");
 698
 699         if (state.TASK) {
 700             classdefout.println("  void * flagptr;");
 701         }
 702         printClassStruct(cn, classdefout);
 703         classdefout.println("};\n");
 704
 705         /* Cycle through methods */
 706         Iterator methodit=cn.getMethods();
 707         while(methodit.hasNext()) {
 708             /* Classify parameters */
 709             MethodDescriptor md=(MethodDescriptor)methodit.next();
 710             FlatMethod fm=state.getMethodFlat(md);
 711             generateTempStructs(fm);
 712
 713             ParamsObject objectparams=(ParamsObject) paramstable.get(md);
 714             TempObject objecttemps=(TempObject) tempstable.get(md);
 715
 716             /* Output parameter structure */
 717             if (GENERATEPRECISEGC) {
 718                 output.println("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params {");
 719                 output.println("  int size;");
 720                 output.println("  void * next;");
 721                 for(int i=0;i<objectparams.numPointers();i++) {
 722                     TempDescriptor temp=objectparams.getPointer(i);
 723                     output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 724                 }
 725                 output.println("};\n");
 726             }
 727
 728             /* Output temp structure */
 729             if (GENERATEPRECISEGC) {
 730                 output.println("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_locals {");
 731                 output.println("  int size;");
 732                 output.println("  void * next;");
 733                 for(int i=0;i<objecttemps.numPointers();i++) {
 734                     TempDescriptor temp=objecttemps.getPointer(i);
 735                     if (temp.getType().isNull())
 736                         output.println("  void * "+temp.getSafeSymbol()+";");
 737                     else
 738                         output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 739                 }
 740                 output.println("};\n");
 741             }
 742
 743             /* Output method declaration */
 744             if (md.getReturnType()!=null) {
 745                 if (md.getReturnType().isClass()||md.getReturnType().isArray())
 746                     headersout.print("struct " + md.getReturnType().getSafeSymbol()+" * ");
 747                 else
 748                     headersout.print(md.getReturnType().getSafeSymbol()+" ");
 749             } else
 750                 //catch the constructor case
 751                 headersout.print("void ");
 752             headersout.print(cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(");
 753
 754             boolean printcomma=false;
 755             if (GENERATEPRECISEGC) {
 756                 headersout.print("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * "+paramsprefix);
 757                 printcomma=true;
 758             }
 759
 760             //output parameter list
 761             for(int i=0;i<objectparams.numPrimitives();i++) {
 762                 TempDescriptor temp=objectparams.getPrimitive(i);
 763                 if (printcomma)
 764                     headersout.print(", ");
 765                 printcomma=true;
 766                 if (temp.getType().isClass()||temp.getType().isArray())
 767                     headersout.print("struct " + temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol());
 768                 else
 769                     headersout.print(temp.getType().getSafeSymbol()+" "+temp.getSafeSymbol());
 770             }
 771             headersout.println(");\n");
 772         }
 773     }
 774
 775
 776     /** This function outputs (1) structures that parameters are
 777      * passed in (when PRECISE GC is enabled) and (2) function
 778      * prototypes for the tasks */
 779
 780     private void generateTaskStructs(PrintWriter output, PrintWriter headersout) {
 781         /* Cycle through tasks */
 782         Iterator taskit=state.getTaskSymbolTable().getDescriptorsIterator();
 783
 784         while(taskit.hasNext()) {
 785             /* Classify parameters */
 786             TaskDescriptor task=(TaskDescriptor)taskit.next();
 787             FlatMethod fm=state.getMethodFlat(task);
 788             generateTempStructs(fm);
 789
 790             ParamsObject objectparams=(ParamsObject) paramstable.get(task);
 791             TempObject objecttemps=(TempObject) tempstable.get(task);
 792
 793             /* Output parameter structure */
 794             if (GENERATEPRECISEGC) {
 795                 output.println("struct "+task.getSafeSymbol()+"_params {");
 796
 797                 output.println("  int size;");
 798                 output.println("  void * next;");
 799                 for(int i=0;i<objectparams.numPointers();i++) {
 800                     TempDescriptor temp=objectparams.getPointer(i);
 801                     output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 802                 }
 803                 output.println("};\n");
 804                 if (objectparams.numPointers()>maxtaskparams)
 805                     maxtaskparams=objectparams.numPointers();
 806             }
 807
 808             /* Output temp structure */
 809             if (GENERATEPRECISEGC) {
 810                 output.println("struct "+task.getSafeSymbol()+"_locals {");
 811                 output.println("  int size;");
 812                 output.println("  void * next;");
 813                 for(int i=0;i<objecttemps.numPointers();i++) {
 814                     TempDescriptor temp=objecttemps.getPointer(i);
 815                     if (temp.getType().isNull())
 816                         output.println("  void * "+temp.getSafeSymbol()+";");
 817                     else
 818                         output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 819                 }
 820                 output.println("};\n");
 821             }
 822
 823             /* Output task declaration */
 824             headersout.print("void " + task.getSafeSymbol()+"(");
 825
 826             boolean printcomma=false;
 827             if (GENERATEPRECISEGC) {
 828                 headersout.print("struct "+task.getSafeSymbol()+"_params * "+paramsprefix);
 829             } else
 830                 headersout.print("void * parameterarray[]");
 831             headersout.println(");\n");
 832         }
 833     }
 834
 835     /** Generate code for flatmethod fm. */
 836
 837     private void generateFlatMethod(FlatMethod fm, PrintWriter output) {
 838         MethodDescriptor md=fm.getMethod();
 839         TaskDescriptor task=fm.getTask();
 840
 841         ClassDescriptor cn=md!=null?md.getClassDesc():null;
 842
 843         ParamsObject objectparams=(ParamsObject)paramstable.get(md!=null?md:task);
 844
 845         generateHeader(md!=null?md:task,output);
 846
 847         TempObject objecttemp=(TempObject) tempstable.get(md!=null?md:task);
 848
 849         /* Print code */
 850         if (GENERATEPRECISEGC) {
 851             if (md!=null)
 852                 output.print("   struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_locals "+localsprefix+"={");
 853             else
 854                 output.print("   struct "+task.getSafeSymbol()+"_locals "+localsprefix+"={");
 855
 856             output.print(objecttemp.numPointers()+",");
 857             output.print(paramsprefix);
 858             for(int j=0;j<objecttemp.numPointers();j++)
 859                 output.print(", NULL");
 860             output.println("};");
 861         }
 862
 863         for(int i=0;i<objecttemp.numPrimitives();i++) {
 864             TempDescriptor td=objecttemp.getPrimitive(i);
 865             TypeDescriptor type=td.getType();
 866             if (type.isNull())
 867                 output.println("   void * "+td.getSafeSymbol()+";");
 868             else if (type.isClass()||type.isArray())
 869                 output.println("   struct "+type.getSafeSymbol()+" * "+td.getSafeSymbol()+";");
 870             else
 871                 output.println("   "+type.getSafeSymbol()+" "+td.getSafeSymbol()+";");
 872         }
 873
 874         /* Generate labels first */
 875         HashSet tovisit=new HashSet();
 876         HashSet visited=new HashSet();
 877         int labelindex=0;
 878         Hashtable nodetolabel=new Hashtable();
 879         tovisit.add(fm.methodEntryNode());
 880         FlatNode current_node=null;
 881
 882         //Assign labels 1st
 883         //Node needs a label if it is
 884         while(!tovisit.isEmpty()) {
 885             FlatNode fn=(FlatNode)tovisit.iterator().next();
 886             tovisit.remove(fn);
 887             visited.add(fn);
 888             for(int i=0;i<fn.numNext();i++) {
 889                 FlatNode nn=fn.getNext(i);
 890                 if(i>0) {
 891                     //1) Edge >1 of node
 892                     nodetolabel.put(nn,new Integer(labelindex++));
 893                 }
 894                 if (!visited.contains(nn)&&!tovisit.contains(nn)) {
 895                     tovisit.add(nn);
 896                 } else {
 897                     //2) Join point
 898                     nodetolabel.put(nn,new Integer(labelindex++));
 899                 }
 900             }
 901         }
 902
 903         //Do the actual code generation
 904         tovisit=new HashSet();
 905         visited=new HashSet();
 906         tovisit.add(fm.methodEntryNode());
 907         while(current_node!=null||!tovisit.isEmpty()) {
 908             if (current_node==null) {
 909                 current_node=(FlatNode)tovisit.iterator().next();
 910                 tovisit.remove(current_node);
 911             }
 912             visited.add(current_node);
 913             if (nodetolabel.containsKey(current_node))
 914                 output.println("L"+nodetolabel.get(current_node)+":");
 915             if (state.INSTRUCTIONFAILURE) {
 916                 output.println("if ((--instructioncount)==0) injectinstructionfailure();");
 917             }
 918             if (current_node.numNext()==0) {
 919                 output.print("   ");
 920                 generateFlatNode(fm, current_node, output);
 921                 if (current_node.kind()!=FKind.FlatReturnNode) {
 922                     output.println("   return;");
 923                 }
 924                 current_node=null;
 925             } else if(current_node.numNext()==1) {
 926                 output.print("   ");
 927                 generateFlatNode(fm, current_node, output);
 928                 FlatNode nextnode=current_node.getNext(0);
 929                 if (visited.contains(nextnode)) {
 930                     output.println("goto L"+nodetolabel.get(nextnode)+";");
 931                     current_node=null;
 932                 } else
 933                     current_node=nextnode;
 934             } else if (current_node.numNext()==2) {
 935                 /* Branch */
 936                 output.print("   ");
 937                 generateFlatCondBranch(fm, (FlatCondBranch)current_node, "L"+nodetolabel.get(current_node.getNext(1)), output);
 938                 if (!visited.contains(current_node.getNext(1)))
 939                     tovisit.add(current_node.getNext(1));
 940                 if (visited.contains(current_node.getNext(0))) {
 941                     output.println("goto L"+nodetolabel.get(current_node.getNext(0))+";");
 942                     current_node=null;
 943                 } else
 944                     current_node=current_node.getNext(0);
 945             } else throw new Error();
 946         }
 947
 948
 949         output.println("}\n\n");
 950     }
 951
 952     /** Generate text string that corresponds to the Temp td. */
 953     private String generateTemp(FlatMethod fm, TempDescriptor td) {
 954         MethodDescriptor md=fm.getMethod();
 955         TaskDescriptor task=fm.getTask();
 956         TempObject objecttemps=(TempObject) tempstable.get(md!=null?md:task);
 957
 958         if (objecttemps.isLocalPrim(td)||objecttemps.isParamPrim(td)) {
 959             return td.getSafeSymbol();
 960         }
 961
 962         if (objecttemps.isLocalPtr(td)) {
 963             return localsprefix+"."+td.getSafeSymbol();
 964         }
 965
 966         if (objecttemps.isParamPtr(td)) {
 967             return paramsprefix+"->"+td.getSafeSymbol();
 968         }
 969         throw new Error();
 970     }
 971
 972     private void generateFlatNode(FlatMethod fm, FlatNode fn, PrintWriter output) {
 973         switch(fn.kind()) {
 974         case FKind.FlatCall:
 975             generateFlatCall(fm, (FlatCall) fn,output);
 976             return;
 977         case FKind.FlatFieldNode:
 978             generateFlatFieldNode(fm, (FlatFieldNode) fn,output);
 979             return;
 980         case FKind.FlatElementNode:
 981             generateFlatElementNode(fm, (FlatElementNode) fn,output);
 982             return;
 983         case FKind.FlatSetElementNode:
 984             generateFlatSetElementNode(fm, (FlatSetElementNode) fn,output);
 985             return;
 986         case FKind.FlatSetFieldNode:
 987             generateFlatSetFieldNode(fm, (FlatSetFieldNode) fn,output);
 988             return;
 989         case FKind.FlatNew:
 990             generateFlatNew(fm, (FlatNew) fn,output);
 991             return;
 992         case FKind.FlatOpNode:
 993             generateFlatOpNode(fm, (FlatOpNode) fn,output);
 994             return;
 995         case FKind.FlatCastNode:
 996             generateFlatCastNode(fm, (FlatCastNode) fn,output);
 997             return;
 998         case FKind.FlatLiteralNode:
 999             generateFlatLiteralNode(fm, (FlatLiteralNode) fn,output);
1000             return;
1001         case FKind.FlatReturnNode:
1002             generateFlatReturnNode(fm, (FlatReturnNode) fn,output);
1003             return;
1004         case FKind.FlatNop:
1005             output.println("/* nop */");
1006             return;
1007         case FKind.FlatCheckNode:
1008             generateFlatCheckNode(fm, (FlatCheckNode) fn, output);
1009             return;
1010         case FKind.FlatFlagActionNode:
1011             generateFlatFlagActionNode(fm, (FlatFlagActionNode) fn, output);
1012             return;
1013         }
1014         throw new Error();
1015
1016     }
1017
1018     private void generateFlatCheckNode(FlatMethod fm,  FlatCheckNode fcn, PrintWriter output) {
1019
1020         if (state.CONSCHECK) {
1021             String specname=fcn.getSpec();
1022             String varname="repairstate___";
1023             output.println("{");
1024             output.println("struct "+specname+"_state * "+varname+"=allocate"+specname+"_state();");
1025
1026             TempDescriptor[] temps=fcn.getTemps();
1027             String[] vars=fcn.getVars();
1028             for(int i=0;i<temps.length;i++) {
1029                 output.println(varname+"->"+vars[i]+"=(int)"+generateTemp(fm, temps[i])+";");
1030             }
1031
1032             output.println("if (doanalysis"+specname+"("+varname+")) {");
1033             output.println("free"+specname+"_state("+varname+");");
1034             output.println("} else {");
1035             output.println("/* Bad invariant */");
1036             output.println("free"+specname+"_state("+varname+");");
1037             output.println("abort_task();");
1038             output.println("}");
1039
1040             output.println("}");
1041         }
1042     }
1043
1044     private void generateFlatCall(FlatMethod fm, FlatCall fc, PrintWriter output) {
1045         MethodDescriptor md=fc.getMethod();
1046         ParamsObject objectparams=(ParamsObject) paramstable.get(md);
1047         ClassDescriptor cn=md.getClassDesc();
1048         output.println("{");
1049         if (GENERATEPRECISEGC) {
1050             output.print("       struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params __parameterlist__={");
1051
1052             output.print(objectparams.numPointers());
1053             //      output.print(objectparams.getUID());
1054             output.print(", & "+localsprefix);
1055             if (fc.getThis()!=null) {
1056                 output.print(", ");
1057                 output.print("(struct "+md.getThis().getType().getSafeSymbol() +" *)"+ generateTemp(fm,fc.getThis()));
1058             }
1059             for(int i=0;i<fc.numArgs();i++) {
1060                 VarDescriptor var=md.getParameter(i);
1061                 TempDescriptor paramtemp=(TempDescriptor)temptovar.get(var);
1062                 if (objectparams.isParamPtr(paramtemp)) {
1063                     TempDescriptor targ=fc.getArg(i);
1064                     output.print(", ");
1065                     output.print("(struct "+md.getParamType(i).getSafeSymbol()  +" *)"+generateTemp(fm, targ));
1066                 }
1067             }
1068             output.println("};");
1069         }
1070         output.print("       ");
1071
1072
1073         if (fc.getReturnTemp()!=null)
1074             output.print(generateTemp(fm,fc.getReturnTemp())+"=");
1075
1076         /* Do we need to do virtual dispatch? */
1077         if (md.isStatic()||md.getReturnType()==null||singleCall(fc.getThis().getType().getClassDesc(),md)) {
1078             output.print(cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor());
1079         } else {
1080
1081             output.print("((");
1082             if (md.getReturnType().isClass()||md.getReturnType().isArray())
1083                 output.print("struct " + md.getReturnType().getSafeSymbol()+" * ");
1084             else
1085                 output.print(md.getReturnType().getSafeSymbol()+" ");
1086             output.print("(*)(");
1087
1088             boolean printcomma=false;
1089             if (GENERATEPRECISEGC) {
1090                 output.print("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * ");
1091                 printcomma=true;
1092             }
1093
1094
1095             for(int i=0;i<objectparams.numPrimitives();i++) {
1096                 TempDescriptor temp=objectparams.getPrimitive(i);
1097                 if (printcomma)
1098                     output.print(", ");
1099                 printcomma=true;
1100                 if (temp.getType().isClass()||temp.getType().isArray())
1101                     output.print("struct " + temp.getType().getSafeSymbol()+" * ");
1102                 else
1103                     output.print(temp.getType().getSafeSymbol());
1104             }
1105
1106             output.print("))virtualtable["+generateTemp(fm,fc.getThis())+"->type*"+maxcount+"+"+virtualcalls.getMethodNumber(md)+"])");
1107         }
1108
1109         output.print("(");
1110         boolean needcomma=false;
1111         if (GENERATEPRECISEGC) {
1112             output.print("&__parameterlist__");
1113             needcomma=true;
1114         } else {
1115             if (fc.getThis()!=null) {
1116                 TypeDescriptor ptd=md.getThis().getType();
1117                 if (ptd.isClass()&&!ptd.isArray())
1118                     output.print("(struct "+ptd.getSafeSymbol()+" *) ");
1119                 output.print(generateTemp(fm,fc.getThis()));
1120                 needcomma=true;
1121             }
1122         }
1123         for(int i=0;i<fc.numArgs();i++) {
1124             VarDescriptor var=md.getParameter(i);
1125             TempDescriptor paramtemp=(TempDescriptor)temptovar.get(var);
1126             if (objectparams.isParamPrim(paramtemp)) {
1127                 TempDescriptor targ=fc.getArg(i);
1128                 if (needcomma)
1129                     output.print(", ");
1130
1131                 TypeDescriptor ptd=md.getParamType(i);
1132                 if (ptd.isClass()&&!ptd.isArray())
1133                     output.print("(struct "+ptd.getSafeSymbol()+" *) ");
1134                 output.print(generateTemp(fm, targ));
1135                 needcomma=true;
1136             }
1137         }
1138         output.println(");");
1139         output.println("   }");
1140     }
1141
1142     private boolean singleCall(ClassDescriptor thiscd, MethodDescriptor md) {
1143         Set subclasses=typeutil.getSubClasses(thiscd);
1144         if (subclasses==null)
1145             return true;
1146         for(Iterator classit=subclasses.iterator();classit.hasNext();) {
1147             ClassDescriptor cd=(ClassDescriptor)classit.next();
1148             Set possiblematches=cd.getMethodTable().getSet(md.getSymbol());
1149             for(Iterator matchit=possiblematches.iterator();matchit.hasNext();) {
1150                 MethodDescriptor matchmd=(MethodDescriptor)matchit.next();
1151                 if (md.matches(matchmd))
1152                     return false;
1153             }
1154         }
1155         return true;
1156     }
1157
1158     private void generateFlatFieldNode(FlatMethod fm, FlatFieldNode ffn, PrintWriter output) {
1159         output.println(generateTemp(fm, ffn.getDst())+"="+ generateTemp(fm,ffn.getSrc())+"->"+ ffn.getField().getSafeSymbol()+";");
1160     }
1161
1162     private void generateFlatSetFieldNode(FlatMethod fm, FlatSetFieldNode fsfn, PrintWriter output) {
1163         if (fsfn.getField().getSymbol().equals("length")&&fsfn.getDst().getType().isArray())
1164             throw new Error("Can't set array length");
1165         output.println(generateTemp(fm, fsfn.getDst())+"->"+ fsfn.getField().getSafeSymbol()+"="+ generateTemp(fm,fsfn.getSrc())+";");
1166     }
1167
1168     private void generateFlatElementNode(FlatMethod fm, FlatElementNode fen, PrintWriter output) {
1169         TypeDescriptor elementtype=fen.getSrc().getType().dereference();
1170         String type="";
1171
1172         if (elementtype.isArray()||elementtype.isClass())
1173             type="void *";
1174         else
1175             type=elementtype.getSafeSymbol()+" ";
1176
1177         if (fen.needsBoundsCheck()) {
1178             output.println("if ("+generateTemp(fm, fen.getIndex())+"< 0 || "+generateTemp(fm, fen.getIndex())+" >= "+generateTemp(fm,fen.getSrc()) + "->___length___)");
1179             output.println("failedboundschk();");
1180         }
1181
1182         output.println(generateTemp(fm, fen.getDst())+"=(("+ type+"*)(((char *) &("+ generateTemp(fm,fen.getSrc())+"->___length___))+sizeof(int)))["+generateTemp(fm, fen.getIndex())+"];");
1183     }
1184
1185     private void generateFlatSetElementNode(FlatMethod fm, FlatSetElementNode fsen, PrintWriter output) {
1186         //TODO: need dynamic check to make sure this assignment is actually legal
1187         //Because Object[] could actually be something more specific...ie. Integer[]
1188
1189         TypeDescriptor elementtype=fsen.getDst().getType().dereference();
1190         String type="";
1191
1192         if (elementtype.isArray()||elementtype.isClass())
1193             type="void *";
1194         else
1195             type=elementtype.getSafeSymbol()+" ";
1196
1197         if (fsen.needsBoundsCheck()) {
1198             output.println("if ("+generateTemp(fm, fsen.getIndex())+"< 0 || "+generateTemp(fm, fsen.getIndex())+" >= "+generateTemp(fm,fsen.getDst()) + "->___length___)");
1199             output.println("failedboundschk();");
1200         }
1201
1202         output.println("(("+type +"*)(((char *) &("+ generateTemp(fm,fsen.getDst())+"->___length___))+sizeof(int)))["+generateTemp(fm, fsen.getIndex())+"]="+generateTemp(fm,fsen.getSrc())+";");
1203     }
1204
1205     private void generateFlatNew(FlatMethod fm, FlatNew fn, PrintWriter output) {
1206         if (fn.getType().isArray()) {
1207             int arrayid=state.getArrayNumber(fn.getType())+state.numClasses();
1208             if (GENERATEPRECISEGC) {
1209                 output.println(generateTemp(fm,fn.getDst())+"=allocate_newarray(&"+localsprefix+", "+arrayid+", "+generateTemp(fm, fn.getSize())+");");
1210             } else {
1211                 output.println(generateTemp(fm,fn.getDst())+"=allocate_newarray("+arrayid+", "+generateTemp(fm, fn.getSize())+");");
1212             }
1213         } else {
1214             if (GENERATEPRECISEGC) {
1215                 output.println(generateTemp(fm,fn.getDst())+"=allocate_new(&"+localsprefix+", "+fn.getType().getClassDesc().getId()+");");
1216             } else {
1217                 output.println(generateTemp(fm,fn.getDst())+"=allocate_new("+fn.getType().getClassDesc().getId()+");");
1218             }
1219         }
1220     }
1221
1222     private void generateFlatOpNode(FlatMethod fm, FlatOpNode fon, PrintWriter output) {
1223
1224         if (fon.getRight()!=null)
1225             output.println(generateTemp(fm, fon.getDest())+" = "+generateTemp(fm, fon.getLeft())+fon.getOp().toString()+generateTemp(fm,fon.getRight())+";");
1226         else if (fon.getOp().getOp()==Operation.ASSIGN)
1227             output.println(generateTemp(fm, fon.getDest())+" = "+generateTemp(fm, fon.getLeft())+";");
1228         else if (fon.getOp().getOp()==Operation.UNARYPLUS)
1229             output.println(generateTemp(fm, fon.getDest())+" = "+generateTemp(fm, fon.getLeft())+";");
1230         else if (fon.getOp().getOp()==Operation.UNARYMINUS)
1231             output.println(generateTemp(fm, fon.getDest())+" = -"+generateTemp(fm, fon.getLeft())+";");
1232         else if (fon.getOp().getOp()==Operation.LOGIC_NOT)
1233             output.println(generateTemp(fm, fon.getDest())+" = !"+generateTemp(fm, fon.getLeft())+";");
1234         else
1235             output.println(generateTemp(fm, fon.getDest())+fon.getOp().toString()+generateTemp(fm, fon.getLeft())+";");
1236     }
1237
1238     private void generateFlatCastNode(FlatMethod fm, FlatCastNode fcn, PrintWriter output) {
1239         /* TODO: Do type check here */
1240         if (fcn.getType().isArray()) {
1241             throw new Error();
1242         } else if (fcn.getType().isClass())
1243             output.println(generateTemp(fm,fcn.getDst())+"=(struct "+fcn.getType().getSafeSymbol()+" *)"+generateTemp(fm,fcn.getSrc())+";");
1244         else
1245             output.println(generateTemp(fm,fcn.getDst())+"=("+fcn.getType().getSafeSymbol()+")"+generateTemp(fm,fcn.getSrc())+";");
1246     }
1247
1248     private void generateFlatLiteralNode(FlatMethod fm, FlatLiteralNode fln, PrintWriter output) {
1249         if (fln.getValue()==null)
1250             output.println(generateTemp(fm, fln.getDst())+"=0;");
1251         else if (fln.getType().getSymbol().equals(TypeUtil.StringClass)) {
1252             if (GENERATEPRECISEGC) {
1253                 output.println(generateTemp(fm, fln.getDst())+"=NewString(&"+localsprefix+", \""+FlatLiteralNode.escapeString((String)fln.getValue())+"\","+((String)fln.getValue()).length()+");");
1254             } else {
1255                 output.println(generateTemp(fm, fln.getDst())+"=NewString(\""+FlatLiteralNode.escapeString((String)fln.getValue())+"\","+((String)fln.getValue()).length()+");");
1256             }
1257         } else if (fln.getType().isBoolean()) {
1258             if (((Boolean)fln.getValue()).booleanValue())
1259                 output.println(generateTemp(fm, fln.getDst())+"=1;");
1260             else
1261                 output.println(generateTemp(fm, fln.getDst())+"=0;");
1262         } else if (fln.getType().isChar()) {
1263             String st=FlatLiteralNode.escapeString(fln.getValue().toString());
1264             output.println(generateTemp(fm, fln.getDst())+"='"+st+"';");
1265         } else
1266             output.println(generateTemp(fm, fln.getDst())+"="+fln.getValue()+";");
1267     }
1268
1269     private void generateFlatReturnNode(FlatMethod fm, FlatReturnNode frn, PrintWriter output) {
1270
1271         if (frn.getReturnTemp()!=null)
1272             output.println("return "+generateTemp(fm, frn.getReturnTemp())+";");
1273         else
1274             output.println("return;");
1275     }
1276
1277     private void generateFlatCondBranch(FlatMethod fm, FlatCondBranch fcb, String label, PrintWriter output) {
1278         output.println("if (!"+generateTemp(fm, fcb.getTest())+") goto "+label+";");
1279     }
1280
1281     private void generateHeader(Descriptor des, PrintWriter output) {
1282         /* Print header */
1283         ParamsObject objectparams=(ParamsObject)paramstable.get(des);
1284         MethodDescriptor md=null;
1285         TaskDescriptor task=null;
1286         if (des instanceof MethodDescriptor)
1287             md=(MethodDescriptor) des;
1288         else
1289             task=(TaskDescriptor) des;
1290
1291         ClassDescriptor cn=md!=null?md.getClassDesc():null;
1292
1293         if (md!=null&&md.getReturnType()!=null) {
1294             if (md.getReturnType().isClass()||md.getReturnType().isArray())
1295                 output.print("struct " + md.getReturnType().getSafeSymbol()+" * ");
1296             else
1297                 output.print(md.getReturnType().getSafeSymbol()+" ");
1298         } else
1299             //catch the constructor case
1300             output.print("void ");
1301         if (md!=null)
1302             output.print(cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(");
1303         else
1304             output.print(task.getSafeSymbol()+"(");
1305
1306         boolean printcomma=false;
1307         if (GENERATEPRECISEGC) {
1308             if (md!=null)
1309                 output.print("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * "+paramsprefix);
1310             else
1311                 output.print("struct "+task.getSafeSymbol()+"_params * "+paramsprefix);
1312             printcomma=true;
1313         }
1314
1315         if (md!=null) {
1316             for(int i=0;i<objectparams.numPrimitives();i++) {
1317                 TempDescriptor temp=objectparams.getPrimitive(i);
1318                 if (printcomma)
1319                     output.print(", ");
1320                 printcomma=true;
1321                 if (temp.getType().isClass()||temp.getType().isArray())
1322                     output.print("struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol());
1323                 else
1324                     output.print(temp.getType().getSafeSymbol()+" "+temp.getSafeSymbol());
1325             }
1326             output.println(") {");
1327         } else if (!GENERATEPRECISEGC){
1328             output.println("void * parameterarray[]) {");
1329             for(int i=0;i<objectparams.numPrimitives();i++) {
1330                 TempDescriptor temp=objectparams.getPrimitive(i);
1331                 output.println("struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+"=parameterarray["+i+"];");
1332             }
1333             if (objectparams.numPrimitives()>maxtaskparams)
1334                 maxtaskparams=objectparams.numPrimitives();
1335         } else output.println(") {");
1336     }
1337
1338     public void generateFlatFlagActionNode(FlatMethod fm, FlatFlagActionNode ffan, PrintWriter output) {
1339         output.println("/* FlatFlagActionNode */");
1340         Hashtable flagandtable=new Hashtable();
1341         Hashtable flagortable=new Hashtable();
1342
1343
1344         Iterator flagsit=ffan.getTempFlagPairs();
1345         while(flagsit.hasNext()) {
1346             TempFlagPair tfp=(TempFlagPair)flagsit.next();
1347             TempDescriptor temp=tfp.getTemp();
1348             Hashtable flagtable=(Hashtable)flagorder.get(temp.getType().getClassDesc());
1349             FlagDescriptor flag=tfp.getFlag();
1350             int flagid=1<<((Integer)flagtable.get(flag)).intValue();
1351             boolean flagstatus=ffan.getFlagChange(tfp);
1352             if (flagstatus) {
1353                 int mask=0;
1354                 if (flagortable.containsKey(temp)) {
1355                     mask=((Integer)flagortable.get(temp)).intValue();
1356                 }
1357                 mask|=flagid;
1358                 flagortable.put(temp,new Integer(mask));
1359             } else {
1360                 int mask=0xFFFFFFFF;
1361                 if (flagandtable.containsKey(temp)) {
1362                     mask=((Integer)flagandtable.get(temp)).intValue();
1363                 }
1364                 mask&=(0xFFFFFFFF^flagid);
1365                 flagandtable.put(temp,new Integer(mask));
1366             }
1367         }
1368         Iterator orit=flagortable.keySet().iterator();
1369         while(orit.hasNext()) {
1370             TempDescriptor temp=(TempDescriptor)orit.next();
1371             int ormask=((Integer)flagortable.get(temp)).intValue();
1372             int andmask=0xFFFFFFF;
1373             if (flagandtable.containsKey(temp))
1374                 andmask=((Integer)flagandtable.get(temp)).intValue();
1375             output.println("flagorand("+generateTemp(fm, temp)+", 0x"+Integer.toHexString(ormask)+", 0x"+Integer.toHexString(andmask)+");");
1376         }
1377         Iterator andit=flagandtable.keySet().iterator();
1378         while(andit.hasNext()) {
1379             TempDescriptor temp=(TempDescriptor)andit.next();
1380             int andmask=((Integer)flagandtable.get(temp)).intValue();
1381             if (!flagortable.containsKey(temp))
1382                 output.println("flagorand("+generateTemp(fm, temp)+", 0, 0x"+Integer.toHexString(andmask)+");");
1383         }
1384     }
1385 }