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.Tree.TagExpressionList;
   6 import IR.*;
   7 import java.util.*;
   8 import java.io.*;
   9 import Util.Relation;
  10
  11 public class BuildCode {
  12     State state;
  13     Hashtable temptovar;
  14     Hashtable paramstable;
  15     Hashtable tempstable;
  16     Hashtable fieldorder;
  17     Hashtable flagorder;
  18     int tag=0;
  19     String localsprefix="___locals___";
  20     String paramsprefix="___params___";
  21     public static boolean GENERATEPRECISEGC=false;
  22     public static String PREFIX="";
  23     public static String arraytype="ArrayObject";
  24     Virtual virtualcalls;
  25     TypeUtil typeutil;
  26     private int maxtaskparams=0;
  27     ClassDescriptor[] cdarray;
  28     TypeDescriptor[] arraytable;
  29
  30     public BuildCode(State st, Hashtable temptovar, TypeUtil typeutil) {
  31         state=st;
  32         this.temptovar=temptovar;
  33         paramstable=new Hashtable();
  34         tempstable=new Hashtable();
  35         fieldorder=new Hashtable();
  36         flagorder=new Hashtable();
  37         this.typeutil=typeutil;
  38         virtualcalls=new Virtual(state);
  39     }
  40
  41     /** The buildCode method outputs C code for all the methods.  The Flat
  42      * versions of the methods must already be generated and stored in
  43      * the State object. */
  44
  45     public void buildCode() {
  46         /* Create output streams to write to */
  47         PrintWriter outclassdefs=null;
  48         PrintWriter outstructs=null;
  49         PrintWriter outrepairstructs=null;
  50         PrintWriter outmethodheader=null;
  51         PrintWriter outmethod=null;
  52         PrintWriter outvirtual=null;
  53         PrintWriter outtask=null;
  54         PrintWriter outtaskdefs=null;
  55
  56         try {
  57             OutputStream str=new FileOutputStream(PREFIX+"structdefs.h");
  58             outstructs=new java.io.PrintWriter(str, true);
  59             str=new FileOutputStream(PREFIX+"methodheaders.h");
  60             outmethodheader=new java.io.PrintWriter(str, true);
  61             str=new FileOutputStream(PREFIX+"classdefs.h");
  62             outclassdefs=new java.io.PrintWriter(str, true);
  63             str=new FileOutputStream(PREFIX+"methods.c");
  64             outmethod=new java.io.PrintWriter(str, true);
  65             str=new FileOutputStream(PREFIX+"virtualtable.h");
  66             outvirtual=new java.io.PrintWriter(str, true);
  67             if (state.TASK) {
  68                 str=new FileOutputStream(PREFIX+"task.h");
  69                 outtask=new java.io.PrintWriter(str, true);
  70                 str=new FileOutputStream(PREFIX+"taskdefs.c");
  71                 outtaskdefs=new java.io.PrintWriter(str, true);
  72             }
  73             if (state.structfile!=null) {
  74                 str=new FileOutputStream(PREFIX+state.structfile+".struct");
  75                 outrepairstructs=new java.io.PrintWriter(str, true);
  76             }
  77         } catch (Exception e) {
  78             e.printStackTrace();
  79             System.exit(-1);
  80         }
  81
  82         /* Build the virtual dispatch tables */
  83         buildVirtualTables(outvirtual);
  84
  85
  86         /* Output includes */
  87
  88         outmethodheader.println("#ifndef METHODHEADERS_H");
  89         outmethodheader.println("#define METHODHEADERS_H");
  90         outmethodheader.println("#include \"structdefs.h\"");
  91
  92         outstructs.println("#ifndef STRUCTDEFS_H");
  93         outstructs.println("#define STRUCTDEFS_H");
  94         outstructs.println("#include \"classdefs.h\"");
  95
  96
  97
  98         /* Output types for short array and string */
  99         outstructs.println("#define STRINGARRAYTYPE "+
 100                            (state.getArrayNumber(
 101                                                  (new TypeDescriptor(typeutil.getClass(TypeUtil.StringClass))).makeArray(state))+state.numClasses()));
 102
 103         outstructs.println("#define OBJECTARRAYTYPE "+
 104                            (state.getArrayNumber(
 105                                                  (new TypeDescriptor(typeutil.getClass(TypeUtil.ObjectClass))).makeArray(state))+state.numClasses()));
 106
 107
 108         outstructs.println("#define STRINGTYPE "+typeutil.getClass(TypeUtil.StringClass).getId());
 109         outstructs.println("#define CHARARRAYTYPE "+
 110                            (state.getArrayNumber((new TypeDescriptor(TypeDescriptor.CHAR)).makeArray(state))+state.numClasses()));
 111
 112         outstructs.println("#define BYTEARRAYTYPE "+
 113                            (state.getArrayNumber((new TypeDescriptor(TypeDescriptor.BYTE)).makeArray(state))+state.numClasses()));
 114
 115         outstructs.println("#define BYTEARRAYARRAYTYPE "+
 116                            (state.getArrayNumber((new TypeDescriptor(TypeDescriptor.BYTE)).makeArray(state).makeArray(state))+state.numClasses()));
 117
 118         outstructs.println("#define NUMCLASSES "+state.numClasses());
 119         if (state.TASK) {
 120             outstructs.println("#define STARTUPTYPE "+typeutil.getClass(TypeUtil.StartupClass).getId());
 121             outstructs.println("#define TAGTYPE "+typeutil.getClass(TypeUtil.TagClass).getId());
 122             outstructs.println("#define TAGARRAYTYPE "+
 123                                (state.getArrayNumber(new TypeDescriptor(typeutil.getClass(TypeUtil.TagClass)).makeArray(state))+state.numClasses()));
 124         }
 125
 126         // Output the C class declarations
 127         // These could mutually reference each other
 128         if (state.THREAD)
 129             outclassdefs.println("#include <pthread.h>");
 130
 131         outclassdefs.println("struct "+arraytype+";");
 132
 133         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 134         while(it.hasNext()) {
 135             ClassDescriptor cn=(ClassDescriptor)it.next();
 136             outclassdefs.println("struct "+cn.getSafeSymbol()+";");
 137         }
 138         outclassdefs.println("");
 139         {
 140             //Print out definition for array type
 141             outclassdefs.println("struct "+arraytype+" {");
 142             outclassdefs.println("  int type;");
 143             if (state.THREAD) {
 144                 outclassdefs.println("  pthread_t tid;");
 145                 outclassdefs.println("  void * lockentry;");
 146                 outclassdefs.println("  int lockcount;");
 147             }
 148
 149             if (state.TASK) {
 150                 outclassdefs.println("  int flag;");
 151                 outclassdefs.println("  void * flagptr;");
 152             }
 153             printClassStruct(typeutil.getClass(TypeUtil.ObjectClass), outclassdefs);
 154             outclassdefs.println("  int ___length___;");
 155             outclassdefs.println("};\n");
 156
 157             if (state.TASK) {
 158             //Print out definitions for task types
 159                 outtask.println("struct parameterdescriptor {");
 160                 outtask.println("int type;");
 161                 outtask.println("int numberterms;");
 162                 outtask.println("int *intarray;");
 163                 outtask.println("void * queue;");
 164                 outtask.println("int numbertags;");
 165                 outtask.println("int *tagarray;");
 166                 outtask.println("};");
 167
 168                 outtask.println("struct taskdescriptor {");
 169                 outtask.println("void * taskptr;");
 170                 outtask.println("int numParameters;");
 171                 outtask.println("int numTotal;");
 172                 outtask.println("struct parameterdescriptor **descriptorarray;");
 173                 outtask.println("char * name;");
 174                 outtask.println("};");
 175                 outtask.println("extern struct taskdescriptor * taskarray[];");
 176                 outtask.println("extern numtasks;");
 177             }
 178         }
 179
 180         // Output function prototypes and structures for parameters
 181         it=state.getClassSymbolTable().getDescriptorsIterator();
 182         while(it.hasNext()) {
 183             ClassDescriptor cn=(ClassDescriptor)it.next();
 184             generateCallStructs(cn, outclassdefs, outstructs, outmethodheader);
 185         }
 186
 187         if (state.TASK) {
 188             /* Map flags to integers */
 189             it=state.getClassSymbolTable().getDescriptorsIterator();
 190             while(it.hasNext()) {
 191                 ClassDescriptor cn=(ClassDescriptor)it.next();
 192                 mapFlags(cn);
 193             }
 194             /* Generate Tasks */
 195             generateTaskStructs(outstructs, outmethodheader);
 196         }
 197
 198         outmethodheader.println("#endif");
 199
 200         outmethodheader.close();
 201
 202         /* Build the actual methods */
 203         outmethod.println("#include \"methodheaders.h\"");
 204         outmethod.println("#include \"virtualtable.h\"");
 205         outmethod.println("#include <runtime.h>");
 206         if (state.THREAD)
 207             outmethod.println("#include <thread.h>");
 208         if (state.main!=null) {
 209             outmethod.println("#include <string.h>");
 210         }
 211
 212         if (state.CONSCHECK) {
 213             outmethod.println("#include \"checkers.h\"");
 214         }
 215         outclassdefs.println("extern int classsize[];");
 216         outclassdefs.println("extern int hasflags[];");
 217         outclassdefs.println("extern int * pointerarray[];");
 218         outclassdefs.println("extern int supertypes[];");
 219
 220         //Store the sizes of classes & array elements
 221         generateSizeArray(outmethod);
 222
 223         //Store table of supertypes
 224         generateSuperTypeTable(outmethod);
 225
 226         //Store the layout of classes
 227         generateLayoutStructs(outmethod);
 228
 229         /* Generate code for methods */
 230         Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
 231         while(classit.hasNext()) {
 232             ClassDescriptor cn=(ClassDescriptor)classit.next();
 233             Iterator methodit=cn.getMethods();
 234             while(methodit.hasNext()) {
 235                 /* Classify parameters */
 236                 MethodDescriptor md=(MethodDescriptor)methodit.next();
 237                 FlatMethod fm=state.getMethodFlat(md);
 238                 if (!md.getModifiers().isNative())
 239                     generateFlatMethod(fm,outmethod);
 240             }
 241         }
 242
 243         if (state.TASK) {
 244             /* Compile task based program */
 245             outtaskdefs.println("#include \"task.h\"");
 246             outtaskdefs.println("#include \"methodheaders.h\"");
 247             Iterator taskit=state.getTaskSymbolTable().getDescriptorsIterator();
 248             while(taskit.hasNext()) {
 249                 TaskDescriptor td=(TaskDescriptor)taskit.next();
 250                 FlatMethod fm=state.getMethodFlat(td);
 251                 generateFlatMethod(fm, outmethod);
 252                 generateTaskDescriptor(outtaskdefs, fm, td);
 253             }
 254
 255             {
 256                 //Output task descriptors
 257                 taskit=state.getTaskSymbolTable().getDescriptorsIterator();
 258                 outtaskdefs.println("struct taskdescriptor * taskarray[]= {");
 259                 boolean first=true;
 260                 while(taskit.hasNext()) {
 261                     TaskDescriptor td=(TaskDescriptor)taskit.next();
 262                     if (first)
 263                         first=false;
 264                     else
 265                         outtaskdefs.println(",");
 266                     outtaskdefs.print("&task_"+td.getSafeSymbol());
 267                 }
 268                 outtaskdefs.println("};");
 269             }
 270
 271             outtaskdefs.println("int numtasks="+state.getTaskSymbolTable().getValueSet().size()+";");
 272
 273         } else if (state.main!=null) {
 274             /* Generate main method */
 275             outmethod.println("int main(int argc, const char *argv[]) {");
 276             outmethod.println("  int i;");
 277             if (GENERATEPRECISEGC) {
 278                 outmethod.println("  struct ArrayObject * stringarray=allocate_newarray(NULL, STRINGARRAYTYPE, argc-1);");
 279             } else {
 280                 outmethod.println("  struct ArrayObject * stringarray=allocate_newarray(STRINGARRAYTYPE, argc-1);");
 281             }
 282             if (state.THREAD) {
 283                 outmethod.println("initializethreads();");
 284             }
 285             outmethod.println("  for(i=1;i<argc;i++) {");
 286             outmethod.println("    int length=strlen(argv[i]);");
 287             if (GENERATEPRECISEGC) {
 288                 outmethod.println("    struct ___String___ *newstring=NewString(NULL, argv[i], length);");
 289             } else {
 290                 outmethod.println("    struct ___String___ *newstring=NewString(argv[i], length);");
 291             }
 292             outmethod.println("    ((void **)(((char *)& stringarray->___length___)+sizeof(int)))[i-1]=newstring;");
 293             outmethod.println("  }");
 294
 295
 296             ClassDescriptor cd=typeutil.getClass(state.main);
 297             Set mainset=cd.getMethodTable().getSet("main");
 298             for(Iterator mainit=mainset.iterator();mainit.hasNext();) {
 299                 MethodDescriptor md=(MethodDescriptor)mainit.next();
 300                 if (md.numParameters()!=1)
 301                     continue;
 302                 Descriptor pd=md.getParameter(0);
 303                 TypeDescriptor tpd=(pd instanceof TagVarDescriptor)?((TagVarDescriptor)pd).getType():((VarDescriptor)pd).getType();
 304                 if (tpd.getArrayCount()!=1)
 305                     continue;
 306                 if (!tpd.getSymbol().equals("String"))
 307                     continue;
 308
 309                 if (!md.getModifiers().isStatic())
 310                     throw new Error("Error: Non static main");
 311                 outmethod.println("   {");
 312                 if (GENERATEPRECISEGC) {
 313                     outmethod.print("       struct "+cd.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params __parameterlist__={");
 314                     outmethod.println("1, NULL,"+"stringarray};");
 315                     outmethod.println("     "+cd.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(& __parameterlist__);");
 316                 } else
 317                     outmethod.println("     "+cd.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(stringarray);");
 318                 outmethod.println("   }");
 319                 break;
 320             }
 321             if (state.THREAD) {
 322                 outmethod.println("pthread_mutex_lock(&gclistlock);");
 323                 outmethod.println("threadcount--;");
 324                 outmethod.println("pthread_cond_signal(&gccond);");
 325                 outmethod.println("pthread_mutex_unlock(&gclistlock);");
 326                 outmethod.println("pthread_exit(NULL);");
 327             }
 328             outmethod.println("}");
 329         }
 330         if (state.TASK)
 331             outstructs.println("#define MAXTASKPARAMS "+maxtaskparams);
 332
 333
 334         /* Output structure definitions for repair tool */
 335         if (state.structfile!=null) {
 336             buildRepairStructs(outrepairstructs);
 337             outrepairstructs.close();
 338         }
 339         outstructs.println("#endif");
 340
 341         outstructs.close();
 342         outmethod.close();
 343     }
 344
 345     private int maxcount=0;
 346
 347     private void buildRepairStructs(PrintWriter outrepairstructs) {
 348         Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
 349         while(classit.hasNext()) {
 350             ClassDescriptor cn=(ClassDescriptor)classit.next();
 351             outrepairstructs.println("structure "+cn.getSymbol()+" {");
 352             outrepairstructs.println("  int __type__;");
 353             if (state.TASK) {
 354                 outrepairstructs.println("  int __flag__;");
 355                 outrepairstructs.println("  int __flagptr__;");
 356             }
 357             printRepairStruct(cn, outrepairstructs);
 358             outrepairstructs.println("}\n");
 359         }
 360
 361         for(int i=0;i<state.numArrays();i++) {
 362             TypeDescriptor tdarray=arraytable[i];
 363             TypeDescriptor tdelement=tdarray.dereference();
 364             outrepairstructs.println("structure "+arraytype+"_"+state.getArrayNumber(tdarray)+" {");
 365             outrepairstructs.println("  int __type__;");
 366             printRepairStruct(typeutil.getClass(TypeUtil.ObjectClass), outrepairstructs);
 367             outrepairstructs.println("  int length;");
 368             /*
 369               // Need to add support to repair tool for this
 370               if (tdelement.isClass()||tdelement.isArray())
 371                 outrepairstructs.println("  "+tdelement.getRepairSymbol()+" * elem[this.length];");
 372             else
 373                 outrepairstructs.println("  "+tdelement.getRepairSymbol()+" elem[this.length];");
 374             */
 375             outrepairstructs.println("}\n");
 376         }
 377
 378     }
 379
 380     private void printRepairStruct(ClassDescriptor cn, PrintWriter output) {
 381         ClassDescriptor sp=cn.getSuperDesc();
 382         if (sp!=null)
 383             printRepairStruct(sp, output);
 384
 385         Vector fields=(Vector)fieldorder.get(cn);
 386
 387         for(int i=0;i<fields.size();i++) {
 388             FieldDescriptor fd=(FieldDescriptor)fields.get(i);
 389             if (fd.getType().isArray()) {
 390                 output.println("  "+arraytype+"_"+ state.getArrayNumber(fd.getType()) +" * "+fd.getSymbol()+";");
 391             } else if (fd.getType().isClass())
 392                 output.println("  "+fd.getType().getRepairSymbol()+" * "+fd.getSymbol()+";");
 393             else if (fd.getType().isFloat())
 394                 output.println("  int "+fd.getSymbol()+"; /* really float */");
 395             else
 396                 output.println("  "+fd.getType().getRepairSymbol()+" "+fd.getSymbol()+";");
 397         }
 398     }
 399
 400     /** This method outputs TaskDescriptor information */
 401     void generateTaskDescriptor(PrintWriter output, FlatMethod fm, TaskDescriptor task) {
 402         for (int i=0;i<task.numParameters();i++) {
 403             VarDescriptor param_var=task.getParameter(i);
 404             TypeDescriptor param_type=task.getParamType(i);
 405             FlagExpressionNode param_flag=task.getFlag(param_var);
 406             TagExpressionList param_tag=task.getTag(param_var);
 407
 408             int dnfterms;
 409             if (param_flag==null) {
 410                 output.println("int parameterdnf_"+i+"_"+task.getSafeSymbol()+"[]={");
 411                 output.println("0x0, 0x0 };");
 412                 dnfterms=1;
 413             } else {
 414
 415                 DNFFlag dflag=param_flag.getDNF();
 416                 dnfterms=dflag.size();
 417
 418                 Hashtable flags=(Hashtable)flagorder.get(param_type.getClassDesc());
 419                 output.println("int parameterdnf_"+i+"_"+task.getSafeSymbol()+"[]={");
 420                 for(int j=0;j<dflag.size();j++) {
 421                     if (j!=0)
 422                         output.println(",");
 423                     Vector term=dflag.get(j);
 424                     int andmask=0;
 425                     int checkmask=0;
 426                     for(int k=0;k<term.size();k++) {
 427                         DNFFlagAtom dfa=(DNFFlagAtom)term.get(k);
 428                         FlagDescriptor fd=dfa.getFlag();
 429                         boolean negated=dfa.getNegated();
 430                         int flagid=1<<((Integer)flags.get(fd)).intValue();
 431                         andmask|=flagid;
 432                         if (!negated)
 433                             checkmask|=flagid;
 434                     }
 435                     output.print("0x"+Integer.toHexString(andmask)+", 0x"+Integer.toHexString(checkmask));
 436                 }
 437                 output.println("};");
 438             }
 439
 440             output.println("int parametertag_"+i+"_"+task.getSafeSymbol()+"[]={");
 441             //BUG...added next line to fix, test with any task program
 442             if (param_tag!=null)
 443                 for(int j=0;j<param_tag.numTags();j++) {
 444                     if (j!=0)
 445                         output.println(",");
 446                     /* for each tag we need */
 447                     /* which slot it is */
 448                     /* what type it is */
 449                     TagVarDescriptor tvd=(TagVarDescriptor)task.getParameterTable().get(param_tag.getName(j));
 450                     TempDescriptor tmp=param_tag.getTemp(j);
 451                     int slot=fm.getTagInt(tmp);
 452                     output.println(slot+", "+state.getTagId(tvd.getTag()));
 453                 }
 454             output.println("};");
 455
 456             output.println("struct parameterdescriptor parameter_"+i+"_"+task.getSafeSymbol()+"={");
 457             output.println("/* type */"+param_type.getClassDesc().getId()+",");
 458             output.println("/* number of DNF terms */"+dnfterms+",");
 459             output.println("parameterdnf_"+i+"_"+task.getSafeSymbol()+",");
 460             output.println("0,");
 461             //BUG, added next line to fix and else statement...test
 462             //with any task program
 463             if (param_tag!=null)
 464                 output.println("/* number of tags */"+param_tag.numTags()+",");
 465             else
 466                 output.println("/* number of tags */ 0,");
 467             output.println("parametertag_"+i+"_"+task.getSafeSymbol());
 468             output.println("};");
 469         }
 470
 471
 472         output.println("struct parameterdescriptor * parameterdescriptors_"+task.getSafeSymbol()+"[] = {");
 473         for (int i=0;i<task.numParameters();i++) {
 474             if (i!=0)
 475                 output.println(",");
 476             output.print("&parameter_"+i+"_"+task.getSafeSymbol());
 477         }
 478         output.println("};");
 479
 480         output.println("struct taskdescriptor task_"+task.getSafeSymbol()+"={");
 481         output.println("&"+task.getSafeSymbol()+",");
 482         output.println("/* number of parameters */" +task.numParameters() + ",");
 483         int numtotal=task.numParameters()+fm.numTags();
 484         output.println("/* number total parameters */" +numtotal + ",");
 485         output.println("parameterdescriptors_"+task.getSafeSymbol()+",");
 486         output.println("\""+task.getSymbol()+"\"");
 487         output.println("};");
 488     }
 489
 490
 491     /** The buildVirtualTables method outputs the virtual dispatch
 492      * tables for methods. */
 493
 494     private void buildVirtualTables(PrintWriter outvirtual) {
 495         Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
 496         while(classit.hasNext()) {
 497             ClassDescriptor cd=(ClassDescriptor)classit.next();
 498             if (virtualcalls.getMethodCount(cd)>maxcount)
 499                 maxcount=virtualcalls.getMethodCount(cd);
 500         }
 501         MethodDescriptor[][] virtualtable=new MethodDescriptor[state.numClasses()+state.numArrays()][maxcount];
 502
 503         /* Fill in virtual table */
 504         classit=state.getClassSymbolTable().getDescriptorsIterator();
 505         while(classit.hasNext()) {
 506             ClassDescriptor cd=(ClassDescriptor)classit.next();
 507             fillinRow(cd, virtualtable, cd.getId());
 508         }
 509
 510         ClassDescriptor objectcd=typeutil.getClass(TypeUtil.ObjectClass);
 511         Iterator arrayit=state.getArrayIterator();
 512         while(arrayit.hasNext()) {
 513             TypeDescriptor td=(TypeDescriptor)arrayit.next();
 514             int id=state.getArrayNumber(td);
 515             fillinRow(objectcd, virtualtable, id+state.numClasses());
 516         }
 517
 518         outvirtual.print("void * virtualtable[]={");
 519         boolean needcomma=false;
 520         for(int i=0;i<state.numClasses()+state.numArrays();i++) {
 521             for(int j=0;j<maxcount;j++) {
 522                 if (needcomma)
 523                     outvirtual.print(", ");
 524                 if (virtualtable[i][j]!=null) {
 525                     MethodDescriptor md=virtualtable[i][j];
 526                     outvirtual.print("& "+md.getClassDesc().getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor());
 527                 } else {
 528                     outvirtual.print("0");
 529                 }
 530                 needcomma=true;
 531             }
 532             outvirtual.println("");
 533         }
 534         outvirtual.println("};");
 535         outvirtual.close();
 536     }
 537
 538     private void fillinRow(ClassDescriptor cd, MethodDescriptor[][] virtualtable, int rownum) {
 539         /* Get inherited methods */
 540         if (cd.getSuperDesc()!=null)
 541             fillinRow(cd.getSuperDesc(), virtualtable, rownum);
 542         /* Override them with our methods */
 543         for(Iterator it=cd.getMethods();it.hasNext();) {
 544             MethodDescriptor md=(MethodDescriptor)it.next();
 545             if (md.isStatic()||md.getReturnType()==null)
 546                 continue;
 547             int methodnum=virtualcalls.getMethodNumber(md);
 548             virtualtable[rownum][methodnum]=md;
 549         }
 550     }
 551
 552     /** Generate array that contains the sizes of class objects.  The
 553      * object allocation functions in the runtime use this
 554      * information. */
 555
 556     private void generateSizeArray(PrintWriter outclassdefs) {
 557         outclassdefs.print("int classsize[]={");
 558         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 559         cdarray=new ClassDescriptor[state.numClasses()];
 560         while(it.hasNext()) {
 561             ClassDescriptor cd=(ClassDescriptor)it.next();
 562             cdarray[cd.getId()]=cd;
 563         }
 564         boolean needcomma=false;
 565         for(int i=0;i<state.numClasses();i++) {
 566             if (needcomma)
 567                 outclassdefs.print(", ");
 568             outclassdefs.print("sizeof(struct "+cdarray[i].getSafeSymbol()+")");
 569             needcomma=true;
 570         }
 571
 572         arraytable=new TypeDescriptor[state.numArrays()];
 573
 574         Iterator arrayit=state.getArrayIterator();
 575         while(arrayit.hasNext()) {
 576             TypeDescriptor td=(TypeDescriptor)arrayit.next();
 577             int id=state.getArrayNumber(td);
 578             arraytable[id]=td;
 579         }
 580
 581         for(int i=0;i<state.numArrays();i++) {
 582             if (needcomma)
 583                 outclassdefs.print(", ");
 584             TypeDescriptor tdelement=arraytable[i].dereference();
 585             if (tdelement.isArray()||tdelement.isClass())
 586                 outclassdefs.print("sizeof(void *)");
 587             else
 588                 outclassdefs.print("sizeof("+tdelement.getSafeSymbol()+")");
 589             needcomma=true;
 590         }
 591
 592         outclassdefs.println("};");
 593     }
 594
 595     /** Constructs params and temp objects for each method or task.
 596      * These objects tell the compiler which temps need to be
 597      * allocated.  */
 598
 599     private void generateTempStructs(FlatMethod fm) {
 600         MethodDescriptor md=fm.getMethod();
 601         TaskDescriptor task=fm.getTask();
 602
 603         ParamsObject objectparams=md!=null?new ParamsObject(md,tag++):new ParamsObject(task, tag++);
 604         if (md!=null)
 605             paramstable.put(md, objectparams);
 606         else
 607             paramstable.put(task, objectparams);
 608
 609         for(int i=0;i<fm.numParameters();i++) {
 610             TempDescriptor temp=fm.getParameter(i);
 611             TypeDescriptor type=temp.getType();
 612             if ((type.isPtr()||type.isArray())&&GENERATEPRECISEGC)
 613                 objectparams.addPtr(temp);
 614             else
 615                 objectparams.addPrim(temp);
 616         }
 617
 618         for(int i=0;i<fm.numTags();i++) {
 619             TempDescriptor temp=fm.getTag(i);
 620             if (GENERATEPRECISEGC)
 621                 objectparams.addPtr(temp);
 622             else
 623                 objectparams.addPrim(temp);
 624         }
 625
 626         TempObject objecttemps=md!=null?new TempObject(objectparams,md,tag++):new TempObject(objectparams, task, tag++);
 627         if (md!=null)
 628             tempstable.put(md, objecttemps);
 629         else
 630             tempstable.put(task, objecttemps);
 631
 632         for(Iterator nodeit=fm.getNodeSet().iterator();nodeit.hasNext();) {
 633             FlatNode fn=(FlatNode)nodeit.next();
 634             TempDescriptor[] writes=fn.writesTemps();
 635             for(int i=0;i<writes.length;i++) {
 636                 TempDescriptor temp=writes[i];
 637                 TypeDescriptor type=temp.getType();
 638                 if ((type.isPtr()||type.isArray())&&GENERATEPRECISEGC)
 639                     objecttemps.addPtr(temp);
 640                 else
 641                     objecttemps.addPrim(temp);
 642             }
 643         }
 644     }
 645
 646     private void generateLayoutStructs(PrintWriter output) {
 647         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 648         while(it.hasNext()) {
 649             ClassDescriptor cn=(ClassDescriptor)it.next();
 650             output.println("int "+cn.getSafeSymbol()+"_pointers[]={");
 651             Iterator allit=cn.getFieldTable().getAllDescriptorsIterator();
 652             int count=0;
 653             while(allit.hasNext()) {
 654                 FieldDescriptor fd=(FieldDescriptor)allit.next();
 655                 TypeDescriptor type=fd.getType();
 656                 if (type.isPtr()||type.isArray())
 657                     count++;
 658             }
 659             output.print(count);
 660             allit=cn.getFieldTable().getAllDescriptorsIterator();
 661             while(allit.hasNext()) {
 662                 FieldDescriptor fd=(FieldDescriptor)allit.next();
 663                 TypeDescriptor type=fd.getType();
 664                 if (type.isPtr()||type.isArray()) {
 665                     output.println(",");
 666                     output.print("((int)&(((struct "+cn.getSafeSymbol() +" *)0)->"+fd.getSafeSymbol()+"))");
 667                 }
 668             }
 669             output.println("};");
 670         }
 671         output.println("int * pointerarray[]={");
 672         boolean needcomma=false;
 673         for(int i=0;i<state.numClasses();i++) {
 674             ClassDescriptor cn=cdarray[i];
 675             if (needcomma)
 676                 output.println(",");
 677             needcomma=true;
 678             output.print(cn.getSafeSymbol()+"_pointers");
 679         }
 680
 681         for(int i=0;i<state.numArrays();i++) {
 682             if (needcomma)
 683                 output.println(", ");
 684             TypeDescriptor tdelement=arraytable[i].dereference();
 685             if (tdelement.isArray()||tdelement.isClass())
 686                 output.print("((int *)1)");
 687             else
 688                 output.print("0");
 689             needcomma=true;
 690         }
 691
 692         output.println("};");
 693         needcomma=false;
 694         output.println("int hasflags[]={");
 695         for(int i=0;i<state.numClasses();i++) {
 696             ClassDescriptor cn=cdarray[i];
 697             if (needcomma)
 698                 output.println(", ");
 699             needcomma=true;
 700             if (cn.hasFlags())
 701                 output.print("1");
 702             else
 703                 output.print("0");
 704         }
 705         output.println("};");
 706     }
 707
 708     /** Print out table to give us supertypes */
 709     private void generateSuperTypeTable(PrintWriter output) {
 710         output.println("int supertypes[]={");
 711         boolean needcomma=false;
 712         for(int i=0;i<state.numClasses();i++) {
 713             ClassDescriptor cn=cdarray[i];
 714             if (needcomma)
 715                 output.println(",");
 716             needcomma=true;
 717             if (cn.getSuperDesc()!=null) {
 718                 ClassDescriptor cdsuper=cn.getSuperDesc();
 719                 output.print(cdsuper.getId());
 720             } else
 721                 output.print("-1");
 722         }
 723         output.println("};");
 724     }
 725
 726     /** Force consistent field ordering between inherited classes. */
 727
 728     private void printClassStruct(ClassDescriptor cn, PrintWriter classdefout) {
 729         ClassDescriptor sp=cn.getSuperDesc();
 730         if (sp!=null)
 731             printClassStruct(sp, classdefout);
 732
 733         if (!fieldorder.containsKey(cn)) {
 734             Vector fields=new Vector();
 735             fieldorder.put(cn,fields);
 736             Iterator fieldit=cn.getFields();
 737             while(fieldit.hasNext()) {
 738                 FieldDescriptor fd=(FieldDescriptor)fieldit.next();
 739                 if (sp==null||!sp.getFieldTable().contains(fd.getSymbol()))
 740                     fields.add(fd);
 741             }
 742         }
 743         Vector fields=(Vector)fieldorder.get(cn);
 744
 745         for(int i=0;i<fields.size();i++) {
 746             FieldDescriptor fd=(FieldDescriptor)fields.get(i);
 747             if (fd.getType().isClass()||fd.getType().isArray())
 748                 classdefout.println("  struct "+fd.getType().getSafeSymbol()+" * "+fd.getSafeSymbol()+";");
 749             else
 750                 classdefout.println("  "+fd.getType().getSafeSymbol()+" "+fd.getSafeSymbol()+";");
 751         }
 752     }
 753
 754
 755     /* Map flags to integers consistently between inherited
 756      * classes. */
 757
 758     private void mapFlags(ClassDescriptor cn) {
 759         ClassDescriptor sp=cn.getSuperDesc();
 760         if (sp!=null)
 761             mapFlags(sp);
 762         int max=0;
 763         if (!flagorder.containsKey(cn)) {
 764             Hashtable flags=new Hashtable();
 765             flagorder.put(cn,flags);
 766             if (sp!=null) {
 767                 Hashtable superflags=(Hashtable)flagorder.get(sp);
 768                 Iterator superflagit=superflags.keySet().iterator();
 769                 while(superflagit.hasNext()) {
 770                     FlagDescriptor fd=(FlagDescriptor)superflagit.next();
 771                     Integer number=(Integer)superflags.get(fd);
 772                     flags.put(fd, number);
 773                     if ((number.intValue()+1)>max)
 774                         max=number.intValue()+1;
 775                 }
 776             }
 777
 778             Iterator flagit=cn.getFlags();
 779             while(flagit.hasNext()) {
 780                 FlagDescriptor fd=(FlagDescriptor)flagit.next();
 781                 if (sp==null||!sp.getFlagTable().contains(fd.getSymbol()))
 782                     flags.put(fd, new Integer(max++));
 783             }
 784         }
 785     }
 786
 787
 788     /** This function outputs (1) structures that parameters are
 789      * passed in (when PRECISE GC is enabled) and (2) function
 790      * prototypes for the methods */
 791
 792     private void generateCallStructs(ClassDescriptor cn, PrintWriter classdefout, PrintWriter output, PrintWriter headersout) {
 793         /* Output class structure */
 794         classdefout.println("struct "+cn.getSafeSymbol()+" {");
 795         classdefout.println("  int type;");
 796         if (state.THREAD) {
 797             classdefout.println("  pthread_t tid;");
 798             classdefout.println("  void * lockentry;");
 799             classdefout.println("  int lockcount;");
 800         }
 801
 802         if (state.TASK) {
 803             classdefout.println("  int flag;");
 804             classdefout.println("  void * flagptr;");
 805         }
 806         printClassStruct(cn, classdefout);
 807         classdefout.println("};\n");
 808
 809         /* Cycle through methods */
 810         Iterator methodit=cn.getMethods();
 811         while(methodit.hasNext()) {
 812             /* Classify parameters */
 813             MethodDescriptor md=(MethodDescriptor)methodit.next();
 814             FlatMethod fm=state.getMethodFlat(md);
 815             generateTempStructs(fm);
 816
 817             ParamsObject objectparams=(ParamsObject) paramstable.get(md);
 818             TempObject objecttemps=(TempObject) tempstable.get(md);
 819
 820             /* Output parameter structure */
 821             if (GENERATEPRECISEGC) {
 822                 output.println("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params {");
 823                 output.println("  int size;");
 824                 output.println("  void * next;");
 825                 for(int i=0;i<objectparams.numPointers();i++) {
 826                     TempDescriptor temp=objectparams.getPointer(i);
 827                     output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 828                 }
 829                 output.println("};\n");
 830             }
 831
 832             /* Output temp structure */
 833             if (GENERATEPRECISEGC) {
 834                 output.println("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_locals {");
 835                 output.println("  int size;");
 836                 output.println("  void * next;");
 837                 for(int i=0;i<objecttemps.numPointers();i++) {
 838                     TempDescriptor temp=objecttemps.getPointer(i);
 839                     if (temp.getType().isNull())
 840                         output.println("  void * "+temp.getSafeSymbol()+";");
 841                     else
 842                         output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 843                 }
 844                 output.println("};\n");
 845             }
 846
 847             /* Output method declaration */
 848             if (md.getReturnType()!=null) {
 849                 if (md.getReturnType().isClass()||md.getReturnType().isArray())
 850                     headersout.print("struct " + md.getReturnType().getSafeSymbol()+" * ");
 851                 else
 852                     headersout.print(md.getReturnType().getSafeSymbol()+" ");
 853             } else
 854                 //catch the constructor case
 855                 headersout.print("void ");
 856             headersout.print(cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(");
 857
 858             boolean printcomma=false;
 859             if (GENERATEPRECISEGC) {
 860                 headersout.print("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * "+paramsprefix);
 861                 printcomma=true;
 862             }
 863
 864             //output parameter list
 865             for(int i=0;i<objectparams.numPrimitives();i++) {
 866                 TempDescriptor temp=objectparams.getPrimitive(i);
 867                 if (printcomma)
 868                     headersout.print(", ");
 869                 printcomma=true;
 870                 if (temp.getType().isClass()||temp.getType().isArray())
 871                     headersout.print("struct " + temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol());
 872                 else
 873                     headersout.print(temp.getType().getSafeSymbol()+" "+temp.getSafeSymbol());
 874             }
 875             headersout.println(");\n");
 876         }
 877     }
 878
 879
 880     /** This function outputs (1) structures that parameters are
 881      * passed in (when PRECISE GC is enabled) and (2) function
 882      * prototypes for the tasks */
 883
 884     private void generateTaskStructs(PrintWriter output, PrintWriter headersout) {
 885         /* Cycle through tasks */
 886         Iterator taskit=state.getTaskSymbolTable().getDescriptorsIterator();
 887
 888         while(taskit.hasNext()) {
 889             /* Classify parameters */
 890             TaskDescriptor task=(TaskDescriptor)taskit.next();
 891             FlatMethod fm=state.getMethodFlat(task);
 892             generateTempStructs(fm);
 893
 894             ParamsObject objectparams=(ParamsObject) paramstable.get(task);
 895             TempObject objecttemps=(TempObject) tempstable.get(task);
 896
 897             /* Output parameter structure */
 898             if (GENERATEPRECISEGC) {
 899                 output.println("struct "+task.getSafeSymbol()+"_params {");
 900
 901                 output.println("  int size;");
 902                 output.println("  void * next;");
 903                 for(int i=0;i<objectparams.numPointers();i++) {
 904                     TempDescriptor temp=objectparams.getPointer(i);
 905                     output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 906                 }
 907
 908                 output.println("};\n");
 909                 if ((objectparams.numPointers()+fm.numTags())>maxtaskparams) {
 910                     maxtaskparams=objectparams.numPointers()+fm.numTags();
 911                 }
 912             }
 913
 914             /* Output temp structure */
 915             if (GENERATEPRECISEGC) {
 916                 output.println("struct "+task.getSafeSymbol()+"_locals {");
 917                 output.println("  int size;");
 918                 output.println("  void * next;");
 919                 for(int i=0;i<objecttemps.numPointers();i++) {
 920                     TempDescriptor temp=objecttemps.getPointer(i);
 921                     if (temp.getType().isNull())
 922                         output.println("  void * "+temp.getSafeSymbol()+";");
 923                     else if(temp.getType().isTag())
 924                         output.println("  struct "+
 925                                        (new TypeDescriptor(typeutil.getClass(TypeUtil.TagClass))).getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 926                     else
 927                         output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 928                 }
 929                 output.println("};\n");
 930             }
 931
 932             /* Output task declaration */
 933             headersout.print("void " + task.getSafeSymbol()+"(");
 934
 935             boolean printcomma=false;
 936             if (GENERATEPRECISEGC) {
 937                 headersout.print("struct "+task.getSafeSymbol()+"_params * "+paramsprefix);
 938             } else
 939                 headersout.print("void * parameterarray[]");
 940             headersout.println(");\n");
 941         }
 942     }
 943
 944     /** Generate code for flatmethod fm. */
 945
 946     private void generateFlatMethod(FlatMethod fm, PrintWriter output) {
 947         MethodDescriptor md=fm.getMethod();
 948         TaskDescriptor task=fm.getTask();
 949
 950         ClassDescriptor cn=md!=null?md.getClassDesc():null;
 951
 952         ParamsObject objectparams=(ParamsObject)paramstable.get(md!=null?md:task);
 953
 954         generateHeader(fm, md!=null?md:task,output);
 955
 956         TempObject objecttemp=(TempObject) tempstable.get(md!=null?md:task);
 957
 958         /* Print code */
 959         if (GENERATEPRECISEGC) {
 960             if (md!=null)
 961                 output.print("   struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_locals "+localsprefix+"={");
 962             else
 963                 output.print("   struct "+task.getSafeSymbol()+"_locals "+localsprefix+"={");
 964
 965             output.print(objecttemp.numPointers()+",");
 966             output.print(paramsprefix);
 967             for(int j=0;j<objecttemp.numPointers();j++)
 968                 output.print(", NULL");
 969             output.println("};");
 970         }
 971
 972         for(int i=0;i<objecttemp.numPrimitives();i++) {
 973             TempDescriptor td=objecttemp.getPrimitive(i);
 974             TypeDescriptor type=td.getType();
 975             if (type.isNull())
 976                 output.println("   void * "+td.getSafeSymbol()+";");
 977             else if (type.isClass()||type.isArray())
 978                 output.println("   struct "+type.getSafeSymbol()+" * "+td.getSafeSymbol()+";");
 979             else
 980                 output.println("   "+type.getSafeSymbol()+" "+td.getSafeSymbol()+";");
 981         }
 982
 983         /* Generate labels first */
 984         HashSet tovisit=new HashSet();
 985         HashSet visited=new HashSet();
 986         int labelindex=0;
 987         Hashtable nodetolabel=new Hashtable();
 988         tovisit.add(fm.getNext(0));
 989         FlatNode current_node=null;
 990
 991         //Assign labels 1st
 992         //Node needs a label if it is
 993         while(!tovisit.isEmpty()) {
 994             FlatNode fn=(FlatNode)tovisit.iterator().next();
 995             tovisit.remove(fn);
 996             visited.add(fn);
 997             for(int i=0;i<fn.numNext();i++) {
 998                 FlatNode nn=fn.getNext(i);
 999                 if(i>0) {
1000                     //1) Edge >1 of node
1001                     nodetolabel.put(nn,new Integer(labelindex++));
1002                 }
1003                 if (!visited.contains(nn)&&!tovisit.contains(nn)) {
1004                     tovisit.add(nn);
1005                 } else {
1006                     //2) Join point
1007                     nodetolabel.put(nn,new Integer(labelindex++));
1008                 }
1009             }
1010         }
1011
1012         if (state.THREAD&&GENERATEPRECISEGC) {
1013             output.println("checkcollect(&"+localsprefix+");");
1014         }
1015
1016         //Do the actual code generation
1017         tovisit=new HashSet();
1018         visited=new HashSet();
1019         tovisit.add(fm.getNext(0));
1020         while(current_node!=null||!tovisit.isEmpty()) {
1021             if (current_node==null) {
1022                 current_node=(FlatNode)tovisit.iterator().next();
1023                 tovisit.remove(current_node);
1024             }
1025             visited.add(current_node);
1026             if (nodetolabel.containsKey(current_node))
1027                 output.println("L"+nodetolabel.get(current_node)+":");
1028             if (state.INSTRUCTIONFAILURE) {
1029                 if (state.THREAD) {
1030                     output.println("if ((++instructioncount)>failurecount) {instructioncount=0;injectinstructionfailure();}");
1031                 }
1032                 else
1033                     output.println("if ((--instructioncount)==0) injectinstructionfailure();");
1034             }
1035             if (current_node.numNext()==0) {
1036                 output.print("   ");
1037                 generateFlatNode(fm, current_node, output);
1038                 if (current_node.kind()!=FKind.FlatReturnNode) {
1039                     output.println("   return;");
1040                 }
1041                 current_node=null;
1042             } else if(current_node.numNext()==1) {
1043                 output.print("   ");
1044                 generateFlatNode(fm, current_node, output);
1045                 FlatNode nextnode=current_node.getNext(0);
1046                 if (visited.contains(nextnode)) {
1047                     output.println("goto L"+nodetolabel.get(nextnode)+";");
1048                     current_node=null;
1049                 } else
1050                     current_node=nextnode;
1051             } else if (current_node.numNext()==2) {
1052                 /* Branch */
1053                 output.print("   ");
1054                 generateFlatCondBranch(fm, (FlatCondBranch)current_node, "L"+nodetolabel.get(current_node.getNext(1)), output);
1055                 if (!visited.contains(current_node.getNext(1)))
1056                     tovisit.add(current_node.getNext(1));
1057                 if (visited.contains(current_node.getNext(0))) {
1058                     output.println("goto L"+nodetolabel.get(current_node.getNext(0))+";");
1059                     current_node=null;
1060                 } else
1061                     current_node=current_node.getNext(0);
1062             } else throw new Error();
1063         }
1064
1065
1066         output.println("}\n\n");
1067     }
1068
1069     /** Generate text string that corresponds to the Temp td. */
1070     private String generateTemp(FlatMethod fm, TempDescriptor td) {
1071         MethodDescriptor md=fm.getMethod();
1072         TaskDescriptor task=fm.getTask();
1073         TempObject objecttemps=(TempObject) tempstable.get(md!=null?md:task);
1074
1075         if (objecttemps.isLocalPrim(td)||objecttemps.isParamPrim(td)) {
1076             return td.getSafeSymbol();
1077         }
1078
1079         if (objecttemps.isLocalPtr(td)) {
1080             return localsprefix+"."+td.getSafeSymbol();
1081         }
1082
1083         if (objecttemps.isParamPtr(td)) {
1084             return paramsprefix+"->"+td.getSafeSymbol();
1085         }
1086         throw new Error();
1087     }
1088
1089     private void generateFlatNode(FlatMethod fm, FlatNode fn, PrintWriter output) {
1090         switch(fn.kind()) {
1091         case FKind.FlatTagDeclaration:
1092             generateFlatTagDeclaration(fm, (FlatTagDeclaration) fn,output);
1093             return;
1094         case FKind.FlatCall:
1095             generateFlatCall(fm, (FlatCall) fn,output);
1096             return;
1097         case FKind.FlatFieldNode:
1098             generateFlatFieldNode(fm, (FlatFieldNode) fn,output);
1099             return;
1100         case FKind.FlatElementNode:
1101             generateFlatElementNode(fm, (FlatElementNode) fn,output);
1102             return;
1103         case FKind.FlatSetElementNode:
1104             generateFlatSetElementNode(fm, (FlatSetElementNode) fn,output);
1105             return;
1106         case FKind.FlatSetFieldNode:
1107             generateFlatSetFieldNode(fm, (FlatSetFieldNode) fn,output);
1108             return;
1109         case FKind.FlatNew:
1110             generateFlatNew(fm, (FlatNew) fn,output);
1111             return;
1112         case FKind.FlatOpNode:
1113             generateFlatOpNode(fm, (FlatOpNode) fn,output);
1114             return;
1115         case FKind.FlatCastNode:
1116             generateFlatCastNode(fm, (FlatCastNode) fn,output);
1117             return;
1118         case FKind.FlatLiteralNode:
1119             generateFlatLiteralNode(fm, (FlatLiteralNode) fn,output);
1120             return;
1121         case FKind.FlatReturnNode:
1122             generateFlatReturnNode(fm, (FlatReturnNode) fn,output);
1123             return;
1124         case FKind.FlatNop:
1125             output.println("/* nop */");
1126             return;
1127         case FKind.FlatBackEdge:
1128             if (state.THREAD&&GENERATEPRECISEGC) {
1129                 output.println("checkcollect(&"+localsprefix+");");
1130             } else
1131                 output.println("/* nop */");
1132             return;
1133         case FKind.FlatCheckNode:
1134             generateFlatCheckNode(fm, (FlatCheckNode) fn, output);
1135             return;
1136         case FKind.FlatFlagActionNode:
1137             generateFlatFlagActionNode(fm, (FlatFlagActionNode) fn, output);
1138             return;
1139         }
1140         throw new Error();
1141
1142     }
1143
1144     private void generateFlatCheckNode(FlatMethod fm,  FlatCheckNode fcn, PrintWriter output) {
1145
1146         if (state.CONSCHECK) {
1147             String specname=fcn.getSpec();
1148             String varname="repairstate___";
1149             output.println("{");
1150             output.println("struct "+specname+"_state * "+varname+"=allocate"+specname+"_state();");
1151
1152             TempDescriptor[] temps=fcn.getTemps();
1153             String[] vars=fcn.getVars();
1154             for(int i=0;i<temps.length;i++) {
1155                 output.println(varname+"->"+vars[i]+"=(int)"+generateTemp(fm, temps[i])+";");
1156             }
1157
1158             output.println("if (doanalysis"+specname+"("+varname+")) {");
1159             output.println("free"+specname+"_state("+varname+");");
1160             output.println("} else {");
1161             output.println("/* Bad invariant */");
1162             output.println("free"+specname+"_state("+varname+");");
1163             output.println("abort_task();");
1164             output.println("}");
1165
1166             output.println("}");
1167         }
1168     }
1169
1170     private void generateFlatCall(FlatMethod fm, FlatCall fc, PrintWriter output) {
1171         MethodDescriptor md=fc.getMethod();
1172         ParamsObject objectparams=(ParamsObject) paramstable.get(md);
1173         ClassDescriptor cn=md.getClassDesc();
1174         output.println("{");
1175         if (GENERATEPRECISEGC) {
1176             output.print("       struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params __parameterlist__={");
1177
1178             output.print(objectparams.numPointers());
1179             //      output.print(objectparams.getUID());
1180             output.print(", & "+localsprefix);
1181             if (fc.getThis()!=null) {
1182                 output.print(", ");
1183                 output.print("(struct "+md.getThis().getType().getSafeSymbol() +" *)"+ generateTemp(fm,fc.getThis()));
1184             }
1185             for(int i=0;i<fc.numArgs();i++) {
1186                 Descriptor var=md.getParameter(i);
1187                 TempDescriptor paramtemp=(TempDescriptor)temptovar.get(var);
1188                 if (objectparams.isParamPtr(paramtemp)) {
1189                     TempDescriptor targ=fc.getArg(i);
1190                     output.print(", ");
1191                     TypeDescriptor td=md.getParamType(i);
1192                     if (td.isTag())
1193                         output.print("(struct "+(new TypeDescriptor(typeutil.getClass(TypeUtil.TagClass))).getSafeSymbol()  +" *)"+generateTemp(fm, targ));
1194                     else
1195                         output.print("(struct "+md.getParamType(i).getSafeSymbol()  +" *)"+generateTemp(fm, targ));
1196                 }
1197             }
1198             output.println("};");
1199         }
1200         output.print("       ");
1201
1202
1203         if (fc.getReturnTemp()!=null)
1204             output.print(generateTemp(fm,fc.getReturnTemp())+"=");
1205
1206         /* Do we need to do virtual dispatch? */
1207         if (md.isStatic()||md.getReturnType()==null||singleCall(fc.getThis().getType().getClassDesc(),md)) {
1208             output.print(cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor());
1209         } else {
1210
1211             output.print("((");
1212             if (md.getReturnType().isClass()||md.getReturnType().isArray())
1213                 output.print("struct " + md.getReturnType().getSafeSymbol()+" * ");
1214             else
1215                 output.print(md.getReturnType().getSafeSymbol()+" ");
1216             output.print("(*)(");
1217
1218             boolean printcomma=false;
1219             if (GENERATEPRECISEGC) {
1220                 output.print("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * ");
1221                 printcomma=true;
1222             }
1223
1224
1225             for(int i=0;i<objectparams.numPrimitives();i++) {
1226                 TempDescriptor temp=objectparams.getPrimitive(i);
1227                 if (printcomma)
1228                     output.print(", ");
1229                 printcomma=true;
1230                 if (temp.getType().isClass()||temp.getType().isArray())
1231                     output.print("struct " + temp.getType().getSafeSymbol()+" * ");
1232                 else
1233                     output.print(temp.getType().getSafeSymbol());
1234             }
1235
1236             output.print("))virtualtable["+generateTemp(fm,fc.getThis())+"->type*"+maxcount+"+"+virtualcalls.getMethodNumber(md)+"])");
1237         }
1238
1239         output.print("(");
1240         boolean needcomma=false;
1241         if (GENERATEPRECISEGC) {
1242             output.print("&__parameterlist__");
1243             needcomma=true;
1244         } else {
1245             if (fc.getThis()!=null) {
1246                 TypeDescriptor ptd=md.getThis().getType();
1247                 if (ptd.isClass()&&!ptd.isArray())
1248                     output.print("(struct "+ptd.getSafeSymbol()+" *) ");
1249                 output.print(generateTemp(fm,fc.getThis()));
1250                 needcomma=true;
1251             }
1252         }
1253         for(int i=0;i<fc.numArgs();i++) {
1254             Descriptor var=md.getParameter(i);
1255             TempDescriptor paramtemp=(TempDescriptor)temptovar.get(var);
1256             if (objectparams.isParamPrim(paramtemp)) {
1257                 TempDescriptor targ=fc.getArg(i);
1258                 if (needcomma)
1259                     output.print(", ");
1260
1261                 TypeDescriptor ptd=md.getParamType(i);
1262                 if (ptd.isClass()&&!ptd.isArray())
1263                     output.print("(struct "+ptd.getSafeSymbol()+" *) ");
1264                 output.print(generateTemp(fm, targ));
1265                 needcomma=true;
1266             }
1267         }
1268         output.println(");");
1269         output.println("   }");
1270     }
1271
1272     private boolean singleCall(ClassDescriptor thiscd, MethodDescriptor md) {
1273         Set subclasses=typeutil.getSubClasses(thiscd);
1274         if (subclasses==null)
1275             return true;
1276         for(Iterator classit=subclasses.iterator();classit.hasNext();) {
1277             ClassDescriptor cd=(ClassDescriptor)classit.next();
1278             Set possiblematches=cd.getMethodTable().getSet(md.getSymbol());
1279             for(Iterator matchit=possiblematches.iterator();matchit.hasNext();) {
1280                 MethodDescriptor matchmd=(MethodDescriptor)matchit.next();
1281                 if (md.matches(matchmd))
1282                     return false;
1283             }
1284         }
1285         return true;
1286     }
1287
1288     private void generateFlatFieldNode(FlatMethod fm, FlatFieldNode ffn, PrintWriter output) {
1289         output.println(generateTemp(fm, ffn.getDst())+"="+ generateTemp(fm,ffn.getSrc())+"->"+ ffn.getField().getSafeSymbol()+";");
1290     }
1291
1292     private void generateFlatSetFieldNode(FlatMethod fm, FlatSetFieldNode fsfn, PrintWriter output) {
1293         if (fsfn.getField().getSymbol().equals("length")&&fsfn.getDst().getType().isArray())
1294             throw new Error("Can't set array length");
1295         output.println(generateTemp(fm, fsfn.getDst())+"->"+ fsfn.getField().getSafeSymbol()+"="+ generateTemp(fm,fsfn.getSrc())+";");
1296     }
1297
1298     private void generateFlatElementNode(FlatMethod fm, FlatElementNode fen, PrintWriter output) {
1299         TypeDescriptor elementtype=fen.getSrc().getType().dereference();
1300         String type="";
1301
1302         if (elementtype.isArray()||elementtype.isClass())
1303             type="void *";
1304         else
1305             type=elementtype.getSafeSymbol()+" ";
1306
1307         if (fen.needsBoundsCheck()) {
1308             output.println("if ("+generateTemp(fm, fen.getIndex())+"< 0 || "+generateTemp(fm, fen.getIndex())+" >= "+generateTemp(fm,fen.getSrc()) + "->___length___)");
1309             output.println("failedboundschk();");
1310         }
1311
1312         output.println(generateTemp(fm, fen.getDst())+"=(("+ type+"*)(((char *) &("+ generateTemp(fm,fen.getSrc())+"->___length___))+sizeof(int)))["+generateTemp(fm, fen.getIndex())+"];");
1313     }
1314
1315     private void generateFlatSetElementNode(FlatMethod fm, FlatSetElementNode fsen, PrintWriter output) {
1316         //TODO: need dynamic check to make sure this assignment is actually legal
1317         //Because Object[] could actually be something more specific...ie. Integer[]
1318
1319         TypeDescriptor elementtype=fsen.getDst().getType().dereference();
1320         String type="";
1321
1322         if (elementtype.isArray()||elementtype.isClass())
1323             type="void *";
1324         else
1325             type=elementtype.getSafeSymbol()+" ";
1326
1327         if (fsen.needsBoundsCheck()) {
1328             output.println("if ("+generateTemp(fm, fsen.getIndex())+"< 0 || "+generateTemp(fm, fsen.getIndex())+" >= "+generateTemp(fm,fsen.getDst()) + "->___length___)");
1329             output.println("failedboundschk();");
1330         }
1331
1332         output.println("(("+type +"*)(((char *) &("+ generateTemp(fm,fsen.getDst())+"->___length___))+sizeof(int)))["+generateTemp(fm, fsen.getIndex())+"]="+generateTemp(fm,fsen.getSrc())+";");
1333     }
1334
1335     private void generateFlatNew(FlatMethod fm, FlatNew fn, PrintWriter output) {
1336         if (fn.getType().isArray()) {
1337             int arrayid=state.getArrayNumber(fn.getType())+state.numClasses();
1338             if (GENERATEPRECISEGC) {
1339                 output.println(generateTemp(fm,fn.getDst())+"=allocate_newarray(&"+localsprefix+", "+arrayid+", "+generateTemp(fm, fn.getSize())+");");
1340             } else {
1341                 output.println(generateTemp(fm,fn.getDst())+"=allocate_newarray("+arrayid+", "+generateTemp(fm, fn.getSize())+");");
1342             }
1343         } else {
1344             if (GENERATEPRECISEGC) {
1345                 output.println(generateTemp(fm,fn.getDst())+"=allocate_new(&"+localsprefix+", "+fn.getType().getClassDesc().getId()+");");
1346             } else {
1347                 output.println(generateTemp(fm,fn.getDst())+"=allocate_new("+fn.getType().getClassDesc().getId()+");");
1348             }
1349         }
1350     }
1351
1352
1353     private void generateFlatTagDeclaration(FlatMethod fm, FlatTagDeclaration fn, PrintWriter output) {
1354         if (GENERATEPRECISEGC) {
1355             output.println(generateTemp(fm,fn.getDst())+"=allocate_tag(&"+localsprefix+", "+state.getTagId(fn.getType())+");");
1356         } else {
1357             output.println(generateTemp(fm,fn.getDst())+"=allocate_tag("+state.getTagId(fn.getType())+");");
1358         }
1359     }
1360
1361     private void generateFlatOpNode(FlatMethod fm, FlatOpNode fon, PrintWriter output) {
1362
1363         if (fon.getRight()!=null)
1364             output.println(generateTemp(fm, fon.getDest())+" = "+generateTemp(fm, fon.getLeft())+fon.getOp().toString()+generateTemp(fm,fon.getRight())+";");
1365         else if (fon.getOp().getOp()==Operation.ASSIGN)
1366             output.println(generateTemp(fm, fon.getDest())+" = "+generateTemp(fm, fon.getLeft())+";");
1367         else if (fon.getOp().getOp()==Operation.UNARYPLUS)
1368             output.println(generateTemp(fm, fon.getDest())+" = "+generateTemp(fm, fon.getLeft())+";");
1369         else if (fon.getOp().getOp()==Operation.UNARYMINUS)
1370             output.println(generateTemp(fm, fon.getDest())+" = -"+generateTemp(fm, fon.getLeft())+";");
1371         else if (fon.getOp().getOp()==Operation.LOGIC_NOT)
1372             output.println(generateTemp(fm, fon.getDest())+" = !"+generateTemp(fm, fon.getLeft())+";");
1373         else
1374             output.println(generateTemp(fm, fon.getDest())+fon.getOp().toString()+generateTemp(fm, fon.getLeft())+";");
1375     }
1376
1377     private void generateFlatCastNode(FlatMethod fm, FlatCastNode fcn, PrintWriter output) {
1378         /* TODO: Do type check here */
1379         if (fcn.getType().isArray()) {
1380             throw new Error();
1381         } else if (fcn.getType().isClass())
1382             output.println(generateTemp(fm,fcn.getDst())+"=(struct "+fcn.getType().getSafeSymbol()+" *)"+generateTemp(fm,fcn.getSrc())+";");
1383         else
1384             output.println(generateTemp(fm,fcn.getDst())+"=("+fcn.getType().getSafeSymbol()+")"+generateTemp(fm,fcn.getSrc())+";");
1385     }
1386
1387     private void generateFlatLiteralNode(FlatMethod fm, FlatLiteralNode fln, PrintWriter output) {
1388         if (fln.getValue()==null)
1389             output.println(generateTemp(fm, fln.getDst())+"=0;");
1390         else if (fln.getType().getSymbol().equals(TypeUtil.StringClass)) {
1391             if (GENERATEPRECISEGC) {
1392                 output.println(generateTemp(fm, fln.getDst())+"=NewString(&"+localsprefix+", \""+FlatLiteralNode.escapeString((String)fln.getValue())+"\","+((String)fln.getValue()).length()+");");
1393             } else {
1394                 output.println(generateTemp(fm, fln.getDst())+"=NewString(\""+FlatLiteralNode.escapeString((String)fln.getValue())+"\","+((String)fln.getValue()).length()+");");
1395             }
1396         } else if (fln.getType().isBoolean()) {
1397             if (((Boolean)fln.getValue()).booleanValue())
1398                 output.println(generateTemp(fm, fln.getDst())+"=1;");
1399             else
1400                 output.println(generateTemp(fm, fln.getDst())+"=0;");
1401         } else if (fln.getType().isChar()) {
1402             String st=FlatLiteralNode.escapeString(fln.getValue().toString());
1403             output.println(generateTemp(fm, fln.getDst())+"='"+st+"';");
1404         } else
1405             output.println(generateTemp(fm, fln.getDst())+"="+fln.getValue()+";");
1406     }
1407
1408     private void generateFlatReturnNode(FlatMethod fm, FlatReturnNode frn, PrintWriter output) {
1409
1410         if (frn.getReturnTemp()!=null)
1411             output.println("return "+generateTemp(fm, frn.getReturnTemp())+";");
1412         else
1413             output.println("return;");
1414     }
1415
1416     private void generateFlatCondBranch(FlatMethod fm, FlatCondBranch fcb, String label, PrintWriter output) {
1417         output.println("if (!"+generateTemp(fm, fcb.getTest())+") goto "+label+";");
1418     }
1419
1420     private void generateHeader(FlatMethod fm, Descriptor des, PrintWriter output) {
1421         /* Print header */
1422         ParamsObject objectparams=(ParamsObject)paramstable.get(des);
1423         MethodDescriptor md=null;
1424         TaskDescriptor task=null;
1425         if (des instanceof MethodDescriptor)
1426             md=(MethodDescriptor) des;
1427         else
1428             task=(TaskDescriptor) des;
1429
1430         ClassDescriptor cn=md!=null?md.getClassDesc():null;
1431
1432         if (md!=null&&md.getReturnType()!=null) {
1433             if (md.getReturnType().isClass()||md.getReturnType().isArray())
1434                 output.print("struct " + md.getReturnType().getSafeSymbol()+" * ");
1435             else
1436                 output.print(md.getReturnType().getSafeSymbol()+" ");
1437         } else
1438             //catch the constructor case
1439             output.print("void ");
1440         if (md!=null)
1441             output.print(cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(");
1442         else
1443             output.print(task.getSafeSymbol()+"(");
1444
1445         boolean printcomma=false;
1446         if (GENERATEPRECISEGC) {
1447             if (md!=null)
1448                 output.print("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * "+paramsprefix);
1449             else
1450                 output.print("struct "+task.getSafeSymbol()+"_params * "+paramsprefix);
1451             printcomma=true;
1452         }
1453
1454         if (md!=null) {
1455             /* Method */
1456             for(int i=0;i<objectparams.numPrimitives();i++) {
1457                 TempDescriptor temp=objectparams.getPrimitive(i);
1458                 if (printcomma)
1459                     output.print(", ");
1460                 printcomma=true;
1461                 if (temp.getType().isClass()||temp.getType().isArray())
1462                     output.print("struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol());
1463                 else
1464                     output.print(temp.getType().getSafeSymbol()+" "+temp.getSafeSymbol());
1465             }
1466             output.println(") {");
1467         } else if (!GENERATEPRECISEGC) {
1468             /* Imprecise Task */
1469             output.println("void * parameterarray[]) {");
1470             /* Unpack variables */
1471             for(int i=0;i<objectparams.numPrimitives();i++) {
1472                 TempDescriptor temp=objectparams.getPrimitive(i);
1473                 output.println("struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+"=parameterarray["+i+"];");
1474             }
1475             for(int i=0;i<fm.numTags();i++) {
1476                 TempDescriptor temp=fm.getTag(i);
1477                 int offset=i+objectparams.numPrimitives();
1478                 output.println("struct ___TagDescriptor___ * "+temp.getSafeSymbol()+"=parameterarray["+offset+"];");
1479             }
1480
1481             if ((objectparams.numPrimitives()+fm.numTags())>maxtaskparams)
1482                 maxtaskparams=objectparams.numPrimitives()+fm.numTags();
1483         } else output.println(") {");
1484     }
1485
1486     public void generateFlatFlagActionNode(FlatMethod fm, FlatFlagActionNode ffan, PrintWriter output) {
1487         output.println("/* FlatFlagActionNode */");
1488
1489
1490         /* Process tag changes */
1491         Relation tagsettable=new Relation();
1492         Relation tagcleartable=new Relation();
1493
1494         Iterator tagsit=ffan.getTempTagPairs();
1495         while (tagsit.hasNext()) {
1496             TempTagPair ttp=(TempTagPair) tagsit.next();
1497             TempDescriptor objtmp=ttp.getTemp();
1498             TagDescriptor tag=ttp.getTag();
1499             TempDescriptor tagtmp=ttp.getTagTemp();
1500             boolean tagstatus=ffan.getTagChange(ttp);
1501             if (tagstatus) {
1502                 tagsettable.put(objtmp, tagtmp);
1503             } else {
1504                 tagcleartable.put(objtmp, tagtmp);
1505             }
1506         }
1507
1508
1509         Hashtable flagandtable=new Hashtable();
1510         Hashtable flagortable=new Hashtable();
1511
1512         /* Process flag changes */
1513         Iterator flagsit=ffan.getTempFlagPairs();
1514         while(flagsit.hasNext()) {
1515             TempFlagPair tfp=(TempFlagPair)flagsit.next();
1516             TempDescriptor temp=tfp.getTemp();
1517             Hashtable flagtable=(Hashtable)flagorder.get(temp.getType().getClassDesc());
1518             FlagDescriptor flag=tfp.getFlag();
1519             if (flag==null) {
1520                 //Newly allocate objects that don't set any flags case
1521                 if (flagortable.containsKey(temp)) {
1522                     throw new Error();
1523                 }
1524                 int mask=0;
1525                 flagortable.put(temp,new Integer(mask));
1526             } else {
1527                 int flagid=1<<((Integer)flagtable.get(flag)).intValue();
1528                 boolean flagstatus=ffan.getFlagChange(tfp);
1529                 if (flagstatus) {
1530                     int mask=0;
1531                     if (flagortable.containsKey(temp)) {
1532                         mask=((Integer)flagortable.get(temp)).intValue();
1533                     }
1534                     mask|=flagid;
1535                     flagortable.put(temp,new Integer(mask));
1536                 } else {
1537                     int mask=0xFFFFFFFF;
1538                     if (flagandtable.containsKey(temp)) {
1539                         mask=((Integer)flagandtable.get(temp)).intValue();
1540                     }
1541                     mask&=(0xFFFFFFFF^flagid);
1542                     flagandtable.put(temp,new Integer(mask));
1543                 }
1544             }
1545         }
1546
1547
1548         HashSet flagtagset=new HashSet();
1549         flagtagset.addAll(flagortable.keySet());
1550         flagtagset.addAll(flagandtable.keySet());
1551         flagtagset.addAll(tagsettable.keySet());
1552         flagtagset.addAll(tagcleartable.keySet());
1553
1554         Iterator ftit=flagtagset.iterator();
1555         while(ftit.hasNext()) {
1556             TempDescriptor temp=(TempDescriptor)ftit.next();
1557
1558
1559             Set tagtmps=tagcleartable.get(temp);
1560             if (tagtmps!=null) {
1561                 Iterator tagit=tagtmps.iterator();
1562                 while(tagit.hasNext()) {
1563                     TempDescriptor tagtmp=(TempDescriptor)tagit.next();
1564                     if (GENERATEPRECISEGC)
1565                         output.println("tagclear(&"+localsprefix+", (struct ___Object___ *)"+generateTemp(fm, temp)+", "+generateTemp(fm,tagtmp)+");");
1566                     else
1567                         output.println("tagclear((struct ___Object___ *)"+generateTemp(fm, temp)+", "+generateTemp(fm,tagtmp)+");");
1568                 }
1569             }
1570
1571             tagtmps=tagsettable.get(temp);
1572             if (tagtmps!=null) {
1573                 Iterator tagit=tagtmps.iterator();
1574                 while(tagit.hasNext()) {
1575                     TempDescriptor tagtmp=(TempDescriptor)tagit.next();
1576                     if (GENERATEPRECISEGC)
1577                         output.println("tagset(&"+localsprefix+", (struct ___Object___ *)"+generateTemp(fm, temp)+", "+generateTemp(fm,tagtmp)+");");
1578                     else
1579                         output.println("tagset((struct ___Object___ *)"+generateTemp(fm, temp)+", "+generateTemp(fm,tagtmp)+");");
1580                 }
1581             }
1582
1583             int ormask=0;
1584             int andmask=0xFFFFFFF;
1585
1586             if (flagortable.containsKey(temp))
1587                 ormask=((Integer)flagortable.get(temp)).intValue();
1588             if (flagandtable.containsKey(temp))
1589                 andmask=((Integer)flagandtable.get(temp)).intValue();
1590             if (ffan.getTaskType()==FlatFlagActionNode.NEWOBJECT) {
1591                 output.println("flagorandinit("+generateTemp(fm, temp)+", 0x"+Integer.toHexString(ormask)+", 0x"+Integer.toHexString(andmask)+");");
1592             } else {
1593                 output.println("flagorand("+generateTemp(fm, temp)+", 0x"+Integer.toHexString(ormask)+", 0x"+Integer.toHexString(andmask)+");");
1594             }
1595         }
1596     }
1597 }