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 import Analysis.TaskStateAnalysis.FlagState;
  11 import Analysis.TaskStateAnalysis.FlagComparator;
  12 import Analysis.TaskStateAnalysis.OptionalTaskDescriptor;
  13 import Analysis.TaskStateAnalysis.Predicate;
  14 import Analysis.TaskStateAnalysis.SafetyAnalysis;
  15 import Analysis.TaskStateAnalysis.TaskIndex;
  16 import Analysis.Locality.LocalityAnalysis;
  17 import Analysis.Locality.LocalityBinding;
  18 import Analysis.Prefetch.*;
  19
  20 public class BuildCode {
  21     State state;
  22     Hashtable temptovar;
  23     Hashtable paramstable;
  24     Hashtable tempstable;
  25     Hashtable fieldorder;
  26     Hashtable flagorder;
  27     int tag=0;
  28     String localsprefix="___locals___";
  29     String paramsprefix="___params___";
  30     String oidstr="___nextobject___";
  31     String nextobjstr="___nextobject___";
  32     String localcopystr="___localcopy___";
  33     public static boolean GENERATEPRECISEGC=false;
  34     public static String PREFIX="";
  35     public static String arraytype="ArrayObject";
  36     Virtual virtualcalls;
  37     TypeUtil typeutil;
  38     private int maxtaskparams=0;
  39     private int maxcount=0;
  40     ClassDescriptor[] cdarray;
  41     TypeDescriptor[] arraytable;
  42     LocalityAnalysis locality;
  43     Hashtable<TempDescriptor, TempDescriptor> backuptable;
  44     Hashtable<LocalityBinding, TempDescriptor> reverttable;
  45     SafetyAnalysis sa;
  46
  47     public BuildCode(State st, Hashtable temptovar, TypeUtil typeutil, SafetyAnalysis sa) {
  48         this(st, temptovar, typeutil, null, sa);
  49     }
  50
  51     public BuildCode(State st, Hashtable temptovar, TypeUtil typeutil, LocalityAnalysis locality) {
  52         this(st, temptovar, typeutil, locality, null);
  53     }
  54
  55     public BuildCode(State st, Hashtable temptovar, TypeUtil typeutil, LocalityAnalysis locality, SafetyAnalysis sa) {
  56         this.sa=sa;
  57         state=st;
  58         this.temptovar=temptovar;
  59         paramstable=new Hashtable();
  60         tempstable=new Hashtable();
  61         fieldorder=new Hashtable();
  62         flagorder=new Hashtable();
  63         this.typeutil=typeutil;
  64         virtualcalls=new Virtual(state,locality);
  65         if (locality!=null) {
  66             this.locality=locality;
  67             this.backuptable=new Hashtable<TempDescriptor, TempDescriptor>();
  68             this.reverttable=new Hashtable<LocalityBinding, TempDescriptor>();
  69         }
  70     }
  71
  72     /** The buildCode method outputs C code for all the methods.  The Flat
  73      * versions of the methods must already be generated and stored in
  74      * the State object. */
  75
  76     public void buildCode() {
  77         /* Create output streams to write to */
  78         PrintWriter outclassdefs=null;
  79         PrintWriter outstructs=null;
  80         PrintWriter outrepairstructs=null;
  81         PrintWriter outmethodheader=null;
  82         PrintWriter outmethod=null;
  83         PrintWriter outvirtual=null;
  84         PrintWriter outtask=null;
  85         PrintWriter outtaskdefs=null;
  86         PrintWriter outoptionalarrays=null;
  87         PrintWriter optionalheaders=null;
  88
  89         try {
  90             outstructs=new PrintWriter(new FileOutputStream(PREFIX+"structdefs.h"), true);
  91             outmethodheader=new PrintWriter(new FileOutputStream(PREFIX+"methodheaders.h"), true);
  92             outclassdefs=new PrintWriter(new FileOutputStream(PREFIX+"classdefs.h"), true);
  93             outmethod=new PrintWriter(new FileOutputStream(PREFIX+"methods.c"), true);
  94             outvirtual=new PrintWriter(new FileOutputStream(PREFIX+"virtualtable.h"), true);
  95             if (state.TASK) {
  96                 outtask=new PrintWriter(new FileOutputStream(PREFIX+"task.h"), true);
  97                 outtaskdefs=new PrintWriter(new FileOutputStream(PREFIX+"taskdefs.c"), true);
  98                 if (state.OPTIONAL){
  99                     outoptionalarrays=new PrintWriter(new FileOutputStream(PREFIX+"optionalarrays.c"), true);
 100                     optionalheaders=new PrintWriter(new FileOutputStream(PREFIX+"optionalstruct.h"), true);
 101                 }
 102             }
 103             if (state.structfile!=null) {
 104                 outrepairstructs=new PrintWriter(new FileOutputStream(PREFIX+state.structfile+".struct"), true);
 105             }
 106         } catch (Exception e) {
 107             e.printStackTrace();
 108             System.exit(-1);
 109         }
 110
 111         /* Build the virtual dispatch tables */
 112         buildVirtualTables(outvirtual);
 113
 114         /* Output includes */
 115         outmethodheader.println("#ifndef METHODHEADERS_H");
 116         outmethodheader.println("#define METHODHEADERS_H");
 117         outmethodheader.println("#include \"structdefs.h\"");
 118         if (state.DSM)
 119             outmethodheader.println("#include \"dstm.h\"");
 120
 121         /* Output Structures */
 122         outputStructs(outstructs);
 123
 124         // Output the C class declarations
 125         // These could mutually reference each other
 126         outputClassDeclarations(outclassdefs);
 127
 128         // Output function prototypes and structures for parameters
 129         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 130         while(it.hasNext()) {
 131             ClassDescriptor cn=(ClassDescriptor)it.next();
 132             generateCallStructs(cn, outclassdefs, outstructs, outmethodheader);
 133         }
 134         outclassdefs.close();
 135
 136         if (state.TASK) {
 137             /* Map flags to integers */
 138             /* The runtime keeps track of flags using these integers */
 139             it=state.getClassSymbolTable().getDescriptorsIterator();
 140             while(it.hasNext()) {
 141                 ClassDescriptor cn=(ClassDescriptor)it.next();
 142                 mapFlags(cn);
 143             }
 144             /* Generate Tasks */
 145             generateTaskStructs(outstructs, outmethodheader);
 146
 147             /* Outputs generic task structures if this is a task
 148                program */
 149             outputTaskTypes(outtask);
 150         }
 151
 152         /* Build the actual methods */
 153         outputMethods(outmethod);
 154
 155         if (state.TASK) {
 156             /* Output code for tasks */
 157             outputTaskCode(outtaskdefs, outmethod);
 158             outtaskdefs.close();
 159             /* Record maximum number of task parameters */
 160             outstructs.println("#define MAXTASKPARAMS "+maxtaskparams);
 161         } else if (state.main!=null) {
 162             /* Generate main method */
 163             outputMainMethod(outmethod);
 164         }
 165
 166         /* Generate information for task with optional parameters */
 167         if (state.TASK&&state.OPTIONAL){
 168             generateOptionalArrays(outoptionalarrays, optionalheaders, state.getAnalysisResult(), state.getOptionalTaskDescriptors());
 169             outoptionalarrays.close();
 170         }
 171
 172         /* Output structure definitions for repair tool */
 173         if (state.structfile!=null) {
 174             buildRepairStructs(outrepairstructs);
 175             outrepairstructs.close();
 176         }
 177
 178         /* Close files */
 179         outmethodheader.println("#endif");
 180         outmethodheader.close();
 181         outmethod.close();
 182         outstructs.println("#endif");
 183         outstructs.close();
 184     }
 185
 186     /* This code just generates the main C method for java programs.
 187      * The main C method packs up the arguments into a string array
 188      * and passes it to the java main method. */
 189
 190     private void outputMainMethod(PrintWriter outmethod) {
 191         outmethod.println("int main(int argc, const char *argv[]) {");
 192         outmethod.println("  int i;");
 193         if (state.DSM) {
 194             outmethod.println("if (dstmStartup(argv[1])) {");
 195             if (GENERATEPRECISEGC) {
 196                 outmethod.println("  struct ArrayObject * stringarray=allocate_newarray(NULL, STRINGARRAYTYPE, argc-2);");
 197             } else {
 198                 outmethod.println("  struct ArrayObject * stringarray=allocate_newarray(STRINGARRAYTYPE, argc-2);");
 199             }
 200         } else {
 201             if (GENERATEPRECISEGC) {
 202                 outmethod.println("  struct ArrayObject * stringarray=allocate_newarray(NULL, STRINGARRAYTYPE, argc-1);");
 203             } else {
 204                 outmethod.println("  struct ArrayObject * stringarray=allocate_newarray(STRINGARRAYTYPE, argc-1);");
 205             }
 206         }
 207         if (state.THREAD) {
 208             outmethod.println("initializethreads();");
 209         }
 210         if (state.DSM) {
 211             outmethod.println("  for(i=2;i<argc;i++) {");
 212         } else
 213             outmethod.println("  for(i=1;i<argc;i++) {");
 214         outmethod.println("    int length=strlen(argv[i]);");
 215         if (GENERATEPRECISEGC) {
 216             outmethod.println("    struct ___String___ *newstring=NewString(NULL, argv[i], length);");
 217         } else {
 218             outmethod.println("    struct ___String___ *newstring=NewString(argv[i], length);");
 219         }
 220         if (state.DSM)
 221             outmethod.println("    ((void **)(((char *)& stringarray->___length___)+sizeof(int)))[i-2]=newstring;");
 222         else
 223             outmethod.println("    ((void **)(((char *)& stringarray->___length___)+sizeof(int)))[i-1]=newstring;");
 224         outmethod.println("  }");
 225
 226
 227         MethodDescriptor md=typeutil.getMain();
 228         ClassDescriptor cd=typeutil.getMainClass();
 229
 230         outmethod.println("   {");
 231         if (GENERATEPRECISEGC) {
 232             if (state.DSM) {
 233                 outmethod.print("       struct "+cd.getSafeSymbol()+locality.getMain().getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params __parameterlist__={");
 234             } else
 235                 outmethod.print("       struct "+cd.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params __parameterlist__={");
 236             outmethod.println("1, NULL,"+"stringarray};");
 237             if (state.DSM)
 238                 outmethod.println("     "+cd.getSafeSymbol()+locality.getMain().getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(& __parameterlist__);");
 239             else
 240                 outmethod.println("     "+cd.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(& __parameterlist__);");
 241         } else {
 242             if (state.DSM)
 243                 outmethod.println("     "+cd.getSafeSymbol()+locality.getMain().getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(stringarray);");
 244             else
 245                 outmethod.println("     "+cd.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(stringarray);");
 246         }
 247         outmethod.println("   }");
 248
 249         if (state.DSM) {
 250             outmethod.println("}");
 251         }
 252
 253         if (state.THREAD) {
 254             outmethod.println("pthread_mutex_lock(&gclistlock);");
 255             outmethod.println("threadcount--;");
 256             outmethod.println("pthread_cond_signal(&gccond);");
 257             outmethod.println("pthread_mutex_unlock(&gclistlock);");
 258             outmethod.println("pthread_exit(NULL);");
 259         }
 260
 261
 262         outmethod.println("}");
 263     }
 264
 265     /* This method outputs code for each task. */
 266
 267     private void outputTaskCode(PrintWriter outtaskdefs, PrintWriter outmethod) {
 268         /* Compile task based program */
 269         outtaskdefs.println("#include \"task.h\"");
 270         outtaskdefs.println("#include \"methodheaders.h\"");
 271         Iterator taskit=state.getTaskSymbolTable().getDescriptorsIterator();
 272         while(taskit.hasNext()) {
 273             TaskDescriptor td=(TaskDescriptor)taskit.next();
 274             FlatMethod fm=state.getMethodFlat(td);
 275             generateFlatMethod(fm, null, outmethod);
 276             generateTaskDescriptor(outtaskdefs, fm, td);
 277         }
 278
 279         //Output task descriptors
 280         taskit=state.getTaskSymbolTable().getDescriptorsIterator();
 281         outtaskdefs.println("struct taskdescriptor * taskarray[]= {");
 282         boolean first=true;
 283         while(taskit.hasNext()) {
 284             TaskDescriptor td=(TaskDescriptor)taskit.next();
 285             if (first)
 286                 first=false;
 287             else
 288                 outtaskdefs.println(",");
 289             outtaskdefs.print("&task_"+td.getSafeSymbol());
 290         }
 291         outtaskdefs.println("};");
 292
 293         outtaskdefs.println("int numtasks="+state.getTaskSymbolTable().getValueSet().size()+";");
 294     }
 295
 296     /* This method outputs most of the methods.c file.  This includes
 297      * some standard includes and then an array with the sizes of
 298      * objets and array that stores supertype and then the code for
 299      * the Java methods.. */
 300
 301     private void outputMethods(PrintWriter outmethod) {
 302         outmethod.println("#include \"methodheaders.h\"");
 303         outmethod.println("#include \"virtualtable.h\"");
 304         outmethod.println("#include <runtime.h>");
 305         if (state.DSM) {
 306             outmethod.println("#include \"localobjects.h\"");
 307         }
 308         if (state.THREAD)
 309             outmethod.println("#include <thread.h>");
 310         if (state.main!=null) {
 311             outmethod.println("#include <string.h>");
 312         }
 313         if (state.CONSCHECK) {
 314             outmethod.println("#include \"checkers.h\"");
 315         }
 316         //Store the sizes of classes & array elements
 317         generateSizeArray(outmethod);
 318
 319         //Store table of supertypes
 320         generateSuperTypeTable(outmethod);
 321
 322         //Store the layout of classes
 323         generateLayoutStructs(outmethod);
 324
 325         /* Generate code for methods */
 326         if (state.DSM) {
 327             for(Iterator<LocalityBinding> lbit=locality.getLocalityBindings().iterator();lbit.hasNext();) {
 328                 LocalityBinding lb=lbit.next();
 329                 MethodDescriptor md=lb.getMethod();
 330                 FlatMethod fm=state.getMethodFlat(md);
 331                 if (!md.getModifiers().isNative()) {
 332                         generateFlatMethod(fm, lb, outmethod);
 333                 }
 334             }
 335         } else {
 336             Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
 337             while(classit.hasNext()) {
 338                 ClassDescriptor cn=(ClassDescriptor)classit.next();
 339                 Iterator methodit=cn.getMethods();
 340                 while(methodit.hasNext()) {
 341                     /* Classify parameters */
 342                     MethodDescriptor md=(MethodDescriptor)methodit.next();
 343                     FlatMethod fm=state.getMethodFlat(md);
 344                     if (!md.getModifiers().isNative()) {
 345                         generateFlatMethod(fm, null, outmethod);
 346                     }
 347                 }
 348             }
 349         }
 350     }
 351
 352     private void outputStructs(PrintWriter outstructs) {
 353         outstructs.println("#ifndef STRUCTDEFS_H");
 354         outstructs.println("#define STRUCTDEFS_H");
 355         outstructs.println("#include \"classdefs.h\"");
 356
 357         /* Output #defines that the runtime uses to determine type
 358          * numbers for various objects it needs */
 359         outstructs.println("#define MAXCOUNT "+maxcount);
 360         if (state.DSM) {
 361             LocalityBinding lb=new LocalityBinding(typeutil.getRun(), false);
 362             lb.setGlobalThis(LocalityAnalysis.GLOBAL);
 363             outstructs.println("#define RUNMETHOD "+virtualcalls.getLocalityNumber(lb));
 364         }
 365
 366         outstructs.println("#define STRINGARRAYTYPE "+
 367                            (state.getArrayNumber(
 368                                                  (new TypeDescriptor(typeutil.getClass(TypeUtil.StringClass))).makeArray(state))+state.numClasses()));
 369
 370         outstructs.println("#define OBJECTARRAYTYPE "+
 371                            (state.getArrayNumber(
 372                                                  (new TypeDescriptor(typeutil.getClass(TypeUtil.ObjectClass))).makeArray(state))+state.numClasses()));
 373
 374
 375         outstructs.println("#define STRINGTYPE "+typeutil.getClass(TypeUtil.StringClass).getId());
 376         outstructs.println("#define CHARARRAYTYPE "+
 377                            (state.getArrayNumber((new TypeDescriptor(TypeDescriptor.CHAR)).makeArray(state))+state.numClasses()));
 378
 379         outstructs.println("#define BYTEARRAYTYPE "+
 380                            (state.getArrayNumber((new TypeDescriptor(TypeDescriptor.BYTE)).makeArray(state))+state.numClasses()));
 381
 382         outstructs.println("#define BYTEARRAYARRAYTYPE "+
 383                            (state.getArrayNumber((new TypeDescriptor(TypeDescriptor.BYTE)).makeArray(state).makeArray(state))+state.numClasses()));
 384
 385         outstructs.println("#define NUMCLASSES "+state.numClasses());
 386         if (state.TASK) {
 387             outstructs.println("#define STARTUPTYPE "+typeutil.getClass(TypeUtil.StartupClass).getId());
 388             outstructs.println("#define TAGTYPE "+typeutil.getClass(TypeUtil.TagClass).getId());
 389             outstructs.println("#define TAGARRAYTYPE "+
 390                                (state.getArrayNumber(new TypeDescriptor(typeutil.getClass(TypeUtil.TagClass)).makeArray(state))+state.numClasses()));
 391         }
 392     }
 393
 394     private void outputClassDeclarations(PrintWriter outclassdefs) {
 395         if (state.THREAD)
 396             outclassdefs.println("#include <pthread.h>");
 397         if(state.OPTIONAL)
 398             outclassdefs.println("#include \"optionalstruct.h\"");
 399         outclassdefs.println("struct "+arraytype+";");
 400         /* Start by declaring all structs */
 401         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 402         while(it.hasNext()) {
 403             ClassDescriptor cn=(ClassDescriptor)it.next();
 404             outclassdefs.println("struct "+cn.getSafeSymbol()+";");
 405         }
 406         outclassdefs.println("");
 407         //Print out definition for array type
 408         outclassdefs.println("struct "+arraytype+" {");
 409         outclassdefs.println("  int type;");
 410         if (state.THREAD) {
 411             outclassdefs.println("  pthread_t tid;");
 412             outclassdefs.println("  void * lockentry;");
 413             outclassdefs.println("  int lockcount;");
 414         }
 415         if (state.TASK) {
 416             outclassdefs.println("  int flag;");
 417             outclassdefs.println("  void * flagptr;");
 418             if(state.OPTIONAL){
 419                 outclassdefs.println("  int numfses;");
 420                 outclassdefs.println("  int * fses;");
 421             }
 422         }
 423         printClassStruct(typeutil.getClass(TypeUtil.ObjectClass), outclassdefs);
 424
 425         outclassdefs.println("  int ___length___;");
 426         outclassdefs.println("};\n");
 427         outclassdefs.println("extern int classsize[];");
 428         outclassdefs.println("extern int hasflags[];");
 429         outclassdefs.println("extern unsigned int * pointerarray[];");
 430         outclassdefs.println("extern int supertypes[];");
 431     }
 432
 433     /** Prints out definitions for generic task structures */
 434
 435     private void outputTaskTypes(PrintWriter outtask) {
 436         outtask.println("#ifndef _TASK_H");
 437         outtask.println("#define _TASK_H");
 438         outtask.println("struct parameterdescriptor {");
 439         outtask.println("int type;");
 440         outtask.println("int numberterms;");
 441         outtask.println("int *intarray;");
 442         outtask.println("void * queue;");
 443         outtask.println("int numbertags;");
 444         outtask.println("int *tagarray;");
 445         outtask.println("};");
 446
 447         outtask.println("struct taskdescriptor {");
 448         outtask.println("void * taskptr;");
 449         outtask.println("int numParameters;");
 450         outtask.println("int numTotal;");
 451         outtask.println("struct parameterdescriptor **descriptorarray;");
 452         outtask.println("char * name;");
 453         outtask.println("};");
 454         outtask.println("extern struct taskdescriptor * taskarray[];");
 455         outtask.println("extern numtasks;");
 456         outtask.println("#endif");
 457     }
 458
 459
 460     private void buildRepairStructs(PrintWriter outrepairstructs) {
 461         Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
 462         while(classit.hasNext()) {
 463             ClassDescriptor cn=(ClassDescriptor)classit.next();
 464             outrepairstructs.println("structure "+cn.getSymbol()+" {");
 465             outrepairstructs.println("  int __type__;");
 466             if (state.TASK) {
 467                 outrepairstructs.println("  int __flag__;");
 468                 outrepairstructs.println("  int __flagptr__;");
 469             }
 470             printRepairStruct(cn, outrepairstructs);
 471             outrepairstructs.println("}\n");
 472         }
 473
 474         for(int i=0;i<state.numArrays();i++) {
 475             TypeDescriptor tdarray=arraytable[i];
 476             TypeDescriptor tdelement=tdarray.dereference();
 477             outrepairstructs.println("structure "+arraytype+"_"+state.getArrayNumber(tdarray)+" {");
 478             outrepairstructs.println("  int __type__;");
 479             printRepairStruct(typeutil.getClass(TypeUtil.ObjectClass), outrepairstructs);
 480             outrepairstructs.println("  int length;");
 481             /*
 482               // Need to add support to repair tool for this
 483               if (tdelement.isClass()||tdelement.isArray())
 484                 outrepairstructs.println("  "+tdelement.getRepairSymbol()+" * elem[this.length];");
 485             else
 486                 outrepairstructs.println("  "+tdelement.getRepairSymbol()+" elem[this.length];");
 487             */
 488             outrepairstructs.println("}\n");
 489         }
 490     }
 491
 492     private void printRepairStruct(ClassDescriptor cn, PrintWriter output) {
 493         ClassDescriptor sp=cn.getSuperDesc();
 494         if (sp!=null)
 495             printRepairStruct(sp, output);
 496
 497         Vector fields=(Vector)fieldorder.get(cn);
 498
 499         for(int i=0;i<fields.size();i++) {
 500             FieldDescriptor fd=(FieldDescriptor)fields.get(i);
 501             if (fd.getType().isArray()) {
 502                 output.println("  "+arraytype+"_"+ state.getArrayNumber(fd.getType()) +" * "+fd.getSymbol()+";");
 503             } else if (fd.getType().isClass())
 504                 output.println("  "+fd.getType().getRepairSymbol()+" * "+fd.getSymbol()+";");
 505             else if (fd.getType().isFloat())
 506                 output.println("  int "+fd.getSymbol()+"; /* really float */");
 507             else
 508                 output.println("  "+fd.getType().getRepairSymbol()+" "+fd.getSymbol()+";");
 509         }
 510     }
 511
 512     /** This method outputs TaskDescriptor information */
 513     void generateTaskDescriptor(PrintWriter output, FlatMethod fm, TaskDescriptor task) {
 514         for (int i=0;i<task.numParameters();i++) {
 515             VarDescriptor param_var=task.getParameter(i);
 516             TypeDescriptor param_type=task.getParamType(i);
 517             FlagExpressionNode param_flag=task.getFlag(param_var);
 518             TagExpressionList param_tag=task.getTag(param_var);
 519
 520             int dnfterms;
 521             if (param_flag==null) {
 522                 output.println("int parameterdnf_"+i+"_"+task.getSafeSymbol()+"[]={");
 523                 output.println("0x0, 0x0 };");
 524                 dnfterms=1;
 525             } else {
 526                 DNFFlag dflag=param_flag.getDNF();
 527                 dnfterms=dflag.size();
 528
 529                 Hashtable flags=(Hashtable)flagorder.get(param_type.getClassDesc());
 530                 output.println("int parameterdnf_"+i+"_"+task.getSafeSymbol()+"[]={");
 531                 for(int j=0;j<dflag.size();j++) {
 532                     if (j!=0)
 533                         output.println(",");
 534                     Vector term=dflag.get(j);
 535                     int andmask=0;
 536                     int checkmask=0;
 537                     for(int k=0;k<term.size();k++) {
 538                         DNFFlagAtom dfa=(DNFFlagAtom)term.get(k);
 539                         FlagDescriptor fd=dfa.getFlag();
 540                         boolean negated=dfa.getNegated();
 541                         int flagid=1<<((Integer)flags.get(fd)).intValue();
 542                         andmask|=flagid;
 543                         if (!negated)
 544                             checkmask|=flagid;
 545                     }
 546                     output.print("0x"+Integer.toHexString(andmask)+", 0x"+Integer.toHexString(checkmask));
 547                 }
 548                 output.println("};");
 549             }
 550
 551             output.println("int parametertag_"+i+"_"+task.getSafeSymbol()+"[]={");
 552             //BUG...added next line to fix, test with any task program
 553             if (param_tag!=null)
 554                 for(int j=0;j<param_tag.numTags();j++) {
 555                     if (j!=0)
 556                         output.println(",");
 557                     /* for each tag we need */
 558                     /* which slot it is */
 559                     /* what type it is */
 560                     TagVarDescriptor tvd=(TagVarDescriptor)task.getParameterTable().get(param_tag.getName(j));
 561                     TempDescriptor tmp=param_tag.getTemp(j);
 562                     int slot=fm.getTagInt(tmp);
 563                     output.println(slot+", "+state.getTagId(tvd.getTag()));
 564                 }
 565             output.println("};");
 566
 567             output.println("struct parameterdescriptor parameter_"+i+"_"+task.getSafeSymbol()+"={");
 568             output.println("/* type */"+param_type.getClassDesc().getId()+",");
 569             output.println("/* number of DNF terms */"+dnfterms+",");
 570             output.println("parameterdnf_"+i+"_"+task.getSafeSymbol()+",");
 571             output.println("0,");
 572             //BUG, added next line to fix and else statement...test
 573             //with any task program
 574             if (param_tag!=null)
 575                 output.println("/* number of tags */"+param_tag.numTags()+",");
 576             else
 577                 output.println("/* number of tags */ 0,");
 578             output.println("parametertag_"+i+"_"+task.getSafeSymbol());
 579             output.println("};");
 580         }
 581
 582
 583         output.println("struct parameterdescriptor * parameterdescriptors_"+task.getSafeSymbol()+"[] = {");
 584         for (int i=0;i<task.numParameters();i++) {
 585             if (i!=0)
 586                 output.println(",");
 587             output.print("&parameter_"+i+"_"+task.getSafeSymbol());
 588         }
 589         output.println("};");
 590
 591         output.println("struct taskdescriptor task_"+task.getSafeSymbol()+"={");
 592         output.println("&"+task.getSafeSymbol()+",");
 593         output.println("/* number of parameters */" +task.numParameters() + ",");
 594         int numtotal=task.numParameters()+fm.numTags();
 595         output.println("/* number total parameters */" +numtotal + ",");
 596         output.println("parameterdescriptors_"+task.getSafeSymbol()+",");
 597         output.println("\""+task.getSymbol()+"\"");
 598         output.println("};");
 599     }
 600
 601
 602     /** The buildVirtualTables method outputs the virtual dispatch
 603      * tables for methods. */
 604
 605     private void buildVirtualTables(PrintWriter outvirtual) {
 606         Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
 607         while(classit.hasNext()) {
 608             ClassDescriptor cd=(ClassDescriptor)classit.next();
 609             if (virtualcalls.getMethodCount(cd)>maxcount)
 610                 maxcount=virtualcalls.getMethodCount(cd);
 611         }
 612         MethodDescriptor[][] virtualtable=null;
 613         LocalityBinding[][] lbvirtualtable=null;
 614         if (state.DSM)
 615             lbvirtualtable=new LocalityBinding[state.numClasses()+state.numArrays()][maxcount];
 616         else
 617             virtualtable=new MethodDescriptor[state.numClasses()+state.numArrays()][maxcount];
 618
 619         /* Fill in virtual table */
 620         classit=state.getClassSymbolTable().getDescriptorsIterator();
 621         while(classit.hasNext()) {
 622             ClassDescriptor cd=(ClassDescriptor)classit.next();
 623             if (state.DSM)
 624                 fillinRow(cd, lbvirtualtable, cd.getId());
 625             else
 626                 fillinRow(cd, virtualtable, cd.getId());
 627         }
 628
 629         ClassDescriptor objectcd=typeutil.getClass(TypeUtil.ObjectClass);
 630         Iterator arrayit=state.getArrayIterator();
 631         while(arrayit.hasNext()) {
 632             TypeDescriptor td=(TypeDescriptor)arrayit.next();
 633             int id=state.getArrayNumber(td);
 634             if (state.DSM)
 635                 fillinRow(objectcd, lbvirtualtable, id+state.numClasses());
 636             else
 637                 fillinRow(objectcd, virtualtable, id+state.numClasses());
 638         }
 639
 640         outvirtual.print("void * virtualtable[]={");
 641         boolean needcomma=false;
 642         for(int i=0;i<state.numClasses()+state.numArrays();i++) {
 643             for(int j=0;j<maxcount;j++) {
 644                 if (needcomma)
 645                     outvirtual.print(", ");
 646                 if (state.DSM&&lbvirtualtable[i][j]!=null) {
 647                     LocalityBinding lb=lbvirtualtable[i][j];
 648                     MethodDescriptor md=lb.getMethod();
 649                     outvirtual.print("& "+md.getClassDesc().getSafeSymbol()+lb.getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor());
 650                 } else if (!state.DSM&&virtualtable[i][j]!=null) {
 651                     MethodDescriptor md=virtualtable[i][j];
 652                     outvirtual.print("& "+md.getClassDesc().getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor());
 653                 } else {
 654                     outvirtual.print("0");
 655                 }
 656                 needcomma=true;
 657             }
 658             outvirtual.println("");
 659         }
 660         outvirtual.println("};");
 661         outvirtual.close();
 662     }
 663
 664     private void fillinRow(ClassDescriptor cd, MethodDescriptor[][] virtualtable, int rownum) {
 665         /* Get inherited methods */
 666         if (cd.getSuperDesc()!=null)
 667             fillinRow(cd.getSuperDesc(), virtualtable, rownum);
 668         /* Override them with our methods */
 669         for(Iterator it=cd.getMethods();it.hasNext();) {
 670             MethodDescriptor md=(MethodDescriptor)it.next();
 671             if (md.isStatic()||md.getReturnType()==null)
 672                 continue;
 673             int methodnum=virtualcalls.getMethodNumber(md);
 674             virtualtable[rownum][methodnum]=md;
 675         }
 676     }
 677
 678     private void fillinRow(ClassDescriptor cd, LocalityBinding[][] virtualtable, int rownum) {
 679         /* Get inherited methods */
 680         if (cd.getSuperDesc()!=null)
 681             fillinRow(cd.getSuperDesc(), virtualtable, rownum);
 682         /* Override them with our methods */
 683         if (locality.getClassBindings(cd)!=null)
 684             for(Iterator<LocalityBinding> lbit=locality.getClassBindings(cd).iterator();lbit.hasNext();) {
 685                 LocalityBinding lb=lbit.next();
 686                 MethodDescriptor md=lb.getMethod();
 687                 //Is the method static or a constructor
 688                 if (md.isStatic()||md.getReturnType()==null)
 689                     continue;
 690                 int methodnum=virtualcalls.getLocalityNumber(lb);
 691                 virtualtable[rownum][methodnum]=lb;
 692             }
 693     }
 694
 695
 696     /** Generate array that contains the sizes of class objects.  The
 697      * object allocation functions in the runtime use this
 698      * information. */
 699
 700     private void generateSizeArray(PrintWriter outclassdefs) {
 701         outclassdefs.print("int classsize[]={");
 702         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 703         cdarray=new ClassDescriptor[state.numClasses()];
 704         while(it.hasNext()) {
 705             ClassDescriptor cd=(ClassDescriptor)it.next();
 706             cdarray[cd.getId()]=cd;
 707         }
 708         boolean needcomma=false;
 709         for(int i=0;i<state.numClasses();i++) {
 710             if (needcomma)
 711                 outclassdefs.print(", ");
 712             outclassdefs.print("sizeof(struct "+cdarray[i].getSafeSymbol()+")");
 713             needcomma=true;
 714         }
 715
 716         arraytable=new TypeDescriptor[state.numArrays()];
 717
 718         Iterator arrayit=state.getArrayIterator();
 719         while(arrayit.hasNext()) {
 720             TypeDescriptor td=(TypeDescriptor)arrayit.next();
 721             int id=state.getArrayNumber(td);
 722             arraytable[id]=td;
 723         }
 724
 725         for(int i=0;i<state.numArrays();i++) {
 726             if (needcomma)
 727                 outclassdefs.print(", ");
 728             TypeDescriptor tdelement=arraytable[i].dereference();
 729             if (tdelement.isArray()||tdelement.isClass())
 730                 outclassdefs.print("sizeof(void *)");
 731             else
 732                 outclassdefs.print("sizeof("+tdelement.getSafeSymbol()+")");
 733             needcomma=true;
 734         }
 735
 736         outclassdefs.println("};");
 737     }
 738
 739     /** Constructs params and temp objects for each method or task.
 740      * These objects tell the compiler which temps need to be
 741      * allocated.  */
 742
 743     private void generateTempStructs(FlatMethod fm, LocalityBinding lb) {
 744         MethodDescriptor md=fm.getMethod();
 745         TaskDescriptor task=fm.getTask();
 746         Set<TempDescriptor> saveset=lb!=null?locality.getTempSet(lb):null;
 747         ParamsObject objectparams=md!=null?new ParamsObject(md,tag++):new ParamsObject(task, tag++);
 748
 749         if (lb!=null)
 750             paramstable.put(lb, objectparams);
 751         else if (md!=null)
 752             paramstable.put(md, objectparams);
 753         else
 754             paramstable.put(task, objectparams);
 755
 756         for(int i=0;i<fm.numParameters();i++) {
 757             TempDescriptor temp=fm.getParameter(i);
 758             TypeDescriptor type=temp.getType();
 759             if (type.isPtr()&&GENERATEPRECISEGC)
 760                 objectparams.addPtr(temp);
 761             else
 762                 objectparams.addPrim(temp);
 763             if(lb!=null&&saveset.contains(temp)) {
 764                 backuptable.put(temp, temp.createNew());
 765             }
 766         }
 767
 768         for(int i=0;i<fm.numTags();i++) {
 769             TempDescriptor temp=fm.getTag(i);
 770             if (GENERATEPRECISEGC)
 771                 objectparams.addPtr(temp);
 772             else
 773                 objectparams.addPrim(temp);
 774         }
 775
 776         TempObject objecttemps=md!=null?new TempObject(objectparams,md,tag++):new TempObject(objectparams, task, tag++);
 777         if (lb!=null)
 778             tempstable.put(lb, objecttemps);
 779         else if (md!=null)
 780             tempstable.put(md, objecttemps);
 781         else
 782             tempstable.put(task, objecttemps);
 783
 784         for(Iterator nodeit=fm.getNodeSet().iterator();nodeit.hasNext();) {
 785             FlatNode fn=(FlatNode)nodeit.next();
 786             TempDescriptor[] writes=fn.writesTemps();
 787             for(int i=0;i<writes.length;i++) {
 788                 TempDescriptor temp=writes[i];
 789                 TypeDescriptor type=temp.getType();
 790                 if (type.isPtr()&&GENERATEPRECISEGC)
 791                     objecttemps.addPtr(temp);
 792                 else
 793                     objecttemps.addPrim(temp);
 794                 if(lb!=null&&saveset.contains(temp)&&
 795                    !backuptable.containsKey(temp))
 796                     backuptable.put(temp, temp.createNew());
 797             }
 798         }
 799
 800         /* Create backup temps */
 801         if (lb!=null) {
 802             for(Iterator<TempDescriptor> tmpit=backuptable.values().iterator();tmpit.hasNext();) {
 803                 TempDescriptor tmp=tmpit.next();
 804                 TypeDescriptor type=tmp.getType();
 805                 if (type.isPtr()&&GENERATEPRECISEGC)
 806                     objecttemps.addPtr(tmp);
 807                 else
 808                     objecttemps.addPrim(tmp);
 809             }
 810             /* Create temp to hold revert table */
 811             if (lb.getHasAtomic()) {
 812                 TempDescriptor reverttmp=new TempDescriptor("revertlist", typeutil.getClass(TypeUtil.ObjectClass));
 813                 if (GENERATEPRECISEGC)
 814                     objecttemps.addPtr(reverttmp);
 815                 else
 816                     objecttemps.addPrim(reverttmp);
 817                 reverttable.put(lb, reverttmp);
 818             }
 819         }
 820     }
 821
 822     /** This method outputs the following information about classes
 823      * and arrays:
 824      * (1) For classes, what are the locations of pointers.
 825      * (2) For arrays, does the array contain pointers or primitives.
 826      * (3) For classes, does the class contain flags.
 827      */
 828
 829     private void generateLayoutStructs(PrintWriter output) {
 830         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 831         while(it.hasNext()) {
 832             ClassDescriptor cn=(ClassDescriptor)it.next();
 833             output.println("unsigned int "+cn.getSafeSymbol()+"_pointers[]={");
 834             Iterator allit=cn.getFieldTable().getAllDescriptorsIterator();
 835             int count=0;
 836             while(allit.hasNext()) {
 837                 FieldDescriptor fd=(FieldDescriptor)allit.next();
 838                 TypeDescriptor type=fd.getType();
 839                 if (state.DSM&&fd.isGlobal()) //Don't GC the global objects for now
 840                     continue;
 841                 if (type.isPtr())
 842                     count++;
 843             }
 844             output.print(count);
 845             allit=cn.getFieldTable().getAllDescriptorsIterator();
 846             while(allit.hasNext()) {
 847                 FieldDescriptor fd=(FieldDescriptor)allit.next();
 848                 TypeDescriptor type=fd.getType();
 849                 if (state.DSM&&fd.isGlobal()) //Don't GC the global objects for now
 850                     continue;
 851                 if (type.isPtr()) {
 852                     output.println(",");
 853                     output.print("((unsigned int)&(((struct "+cn.getSafeSymbol() +" *)0)->"+fd.getSafeSymbol()+"))");
 854                 }
 855             }
 856             output.println("};");
 857         }
 858         output.println("unsigned int * pointerarray[]={");
 859         boolean needcomma=false;
 860         for(int i=0;i<state.numClasses();i++) {
 861             ClassDescriptor cn=cdarray[i];
 862             if (needcomma)
 863                 output.println(",");
 864             needcomma=true;
 865             output.print(cn.getSafeSymbol()+"_pointers");
 866         }
 867
 868         for(int i=0;i<state.numArrays();i++) {
 869             if (needcomma)
 870                 output.println(", ");
 871             TypeDescriptor tdelement=arraytable[i].dereference();
 872             if (tdelement.isArray()||tdelement.isClass())
 873                 output.print("((unsigned int *)1)");
 874             else
 875                 output.print("0");
 876             needcomma=true;
 877         }
 878
 879         output.println("};");
 880         needcomma=false;
 881         output.println("int hasflags[]={");
 882         for(int i=0;i<state.numClasses();i++) {
 883             ClassDescriptor cn=cdarray[i];
 884             if (needcomma)
 885                 output.println(", ");
 886             needcomma=true;
 887             if (cn.hasFlags())
 888                 output.print("1");
 889             else
 890                 output.print("0");
 891         }
 892         output.println("};");
 893     }
 894
 895     /** Print out table to give us supertypes */
 896     private void generateSuperTypeTable(PrintWriter output) {
 897         output.println("int supertypes[]={");
 898         boolean needcomma=false;
 899         for(int i=0;i<state.numClasses();i++) {
 900             ClassDescriptor cn=cdarray[i];
 901             if (needcomma)
 902                 output.println(",");
 903             needcomma=true;
 904             if (cn.getSuperDesc()!=null) {
 905                 ClassDescriptor cdsuper=cn.getSuperDesc();
 906                 output.print(cdsuper.getId());
 907             } else
 908                 output.print("-1");
 909         }
 910         output.println("};");
 911     }
 912
 913     /** Force consistent field ordering between inherited classes. */
 914
 915     private void printClassStruct(ClassDescriptor cn, PrintWriter classdefout) {
 916
 917         ClassDescriptor sp=cn.getSuperDesc();
 918         if (sp!=null)
 919             printClassStruct(sp, classdefout);
 920
 921         if (!fieldorder.containsKey(cn)) {
 922             Vector fields=new Vector();
 923             fieldorder.put(cn,fields);
 924             Iterator fieldit=cn.getFields();
 925             while(fieldit.hasNext()) {
 926                 FieldDescriptor fd=(FieldDescriptor)fieldit.next();
 927                 if (sp==null||!sp.getFieldTable().contains(fd.getSymbol()))
 928                     fields.add(fd);
 929             }
 930         }
 931         Vector fields=(Vector)fieldorder.get(cn);
 932
 933         for(int i=0;i<fields.size();i++) {
 934             FieldDescriptor fd=(FieldDescriptor)fields.get(i);
 935             if (fd.getType().isClass()||fd.getType().isArray())
 936                 classdefout.println("  struct "+fd.getType().getSafeSymbol()+" * "+fd.getSafeSymbol()+";");
 937             else
 938                 classdefout.println("  "+fd.getType().getSafeSymbol()+" "+fd.getSafeSymbol()+";");
 939         }
 940     }
 941
 942
 943     /* Map flags to integers consistently between inherited
 944      * classes. */
 945
 946     private void mapFlags(ClassDescriptor cn) {
 947         ClassDescriptor sp=cn.getSuperDesc();
 948         if (sp!=null)
 949             mapFlags(sp);
 950         int max=0;
 951         if (!flagorder.containsKey(cn)) {
 952             Hashtable flags=new Hashtable();
 953             flagorder.put(cn,flags);
 954             if (sp!=null) {
 955                 Hashtable superflags=(Hashtable)flagorder.get(sp);
 956                 Iterator superflagit=superflags.keySet().iterator();
 957                 while(superflagit.hasNext()) {
 958                     FlagDescriptor fd=(FlagDescriptor)superflagit.next();
 959                     Integer number=(Integer)superflags.get(fd);
 960                     flags.put(fd, number);
 961                     if ((number.intValue()+1)>max)
 962                         max=number.intValue()+1;
 963                 }
 964             }
 965
 966             Iterator flagit=cn.getFlags();
 967             while(flagit.hasNext()) {
 968                 FlagDescriptor fd=(FlagDescriptor)flagit.next();
 969                 if (sp==null||!sp.getFlagTable().contains(fd.getSymbol()))
 970                     flags.put(fd, new Integer(max++));
 971             }
 972         }
 973     }
 974
 975
 976     /** This function outputs (1) structures that parameters are
 977      * passed in (when PRECISE GC is enabled) and (2) function
 978      * prototypes for the methods */
 979
 980     private void generateCallStructs(ClassDescriptor cn, PrintWriter classdefout, PrintWriter output, PrintWriter headersout) {
 981         /* Output class structure */
 982         classdefout.println("struct "+cn.getSafeSymbol()+" {");
 983         classdefout.println("  int type;");
 984         if (state.THREAD) {
 985             classdefout.println("  pthread_t tid;");
 986             classdefout.println("  void * lockentry;");
 987             classdefout.println("  int lockcount;");
 988         }
 989
 990         if (state.TASK) {
 991             classdefout.println("  int flag;");
 992             classdefout.println("  void * flagptr;");
 993             if (state.OPTIONAL){
 994                 classdefout.println("  int numfses;");
 995                 classdefout.println("  int * fses;");
 996             }
 997         }
 998         printClassStruct(cn, classdefout);
 999         classdefout.println("};\n");
1000
1001         if (state.DSM) {
1002             /* Cycle through LocalityBindings */
1003             HashSet<MethodDescriptor> nativemethods=new HashSet<MethodDescriptor>();
1004             Set<LocalityBinding> lbset=locality.getClassBindings(cn);
1005             if (lbset!=null) {
1006                 for(Iterator<LocalityBinding> lbit=lbset.iterator();lbit.hasNext();) {
1007                     LocalityBinding lb=lbit.next();
1008                     MethodDescriptor md=lb.getMethod();
1009                     if (md.getModifiers().isNative()) {
1010                         //make sure we only print a native method once
1011                         if (nativemethods.contains(md)) {
1012                             FlatMethod fm=state.getMethodFlat(md);
1013                             generateTempStructs(fm, lb);
1014                             continue;
1015                         } else
1016                             nativemethods.add(md);
1017                     }
1018                     generateMethod(cn, md, lb, headersout, output);
1019                 }
1020             }
1021             for(Iterator methodit=cn.getMethods();methodit.hasNext();) {
1022                 MethodDescriptor md=(MethodDescriptor)methodit.next();
1023                 if (md.getModifiers().isNative()&&!nativemethods.contains(md)) {
1024                     //Need to build param structure for library code
1025                     FlatMethod fm=state.getMethodFlat(md);
1026                     generateTempStructs(fm, null);
1027                     generateMethodParam(cn, md, null, output);
1028                 }
1029             }
1030
1031         } else
1032             for(Iterator methodit=cn.getMethods();methodit.hasNext();) {
1033                 MethodDescriptor md=(MethodDescriptor)methodit.next();
1034                 generateMethod(cn, md, null, headersout, output);
1035             }
1036     }
1037
1038     private void generateMethodParam(ClassDescriptor cn, MethodDescriptor md, LocalityBinding lb, PrintWriter output) {
1039         /* Output parameter structure */
1040         if (GENERATEPRECISEGC) {
1041             ParamsObject objectparams=(ParamsObject) paramstable.get(lb!=null?lb:md);
1042             if (state.DSM&&lb!=null)
1043                 output.println("struct "+cn.getSafeSymbol()+lb.getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params {");
1044             else
1045                 output.println("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params {");
1046             output.println("  int size;");
1047             output.println("  void * next;");
1048             for(int i=0;i<objectparams.numPointers();i++) {
1049                 TempDescriptor temp=objectparams.getPointer(i);
1050                 output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
1051             }
1052             output.println("};\n");
1053         }
1054     }
1055
1056
1057     private void generateMethod(ClassDescriptor cn, MethodDescriptor md, LocalityBinding lb, PrintWriter headersout, PrintWriter output) {
1058         FlatMethod fm=state.getMethodFlat(md);
1059         generateTempStructs(fm, lb);
1060
1061         ParamsObject objectparams=(ParamsObject) paramstable.get(lb!=null?lb:md);
1062         TempObject objecttemps=(TempObject) tempstable.get(lb!=null?lb:md);
1063
1064         generateMethodParam(cn, md, lb, output);
1065
1066         /* Output temp structure */
1067         if (GENERATEPRECISEGC) {
1068             if (state.DSM)
1069                 output.println("struct "+cn.getSafeSymbol()+lb.getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_locals {");
1070             else
1071                 output.println("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_locals {");
1072             output.println("  int size;");
1073             output.println("  void * next;");
1074             for(int i=0;i<objecttemps.numPointers();i++) {
1075                 TempDescriptor temp=objecttemps.getPointer(i);
1076                 if (temp.getType().isNull())
1077                     output.println("  void * "+temp.getSafeSymbol()+";");
1078                 else
1079                     output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
1080             }
1081             output.println("};\n");
1082         }
1083
1084         /********* Output method declaration ***********/
1085
1086         /* First the return type */
1087         if (md.getReturnType()!=null) {
1088             if (md.getReturnType().isClass()||md.getReturnType().isArray())
1089                 headersout.print("struct " + md.getReturnType().getSafeSymbol()+" * ");
1090             else
1091                 headersout.print(md.getReturnType().getSafeSymbol()+" ");
1092         } else
1093             //catch the constructor case
1094             headersout.print("void ");
1095
1096         /* Next the method name */
1097         if (state.DSM) {
1098             headersout.print(cn.getSafeSymbol()+lb.getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(");
1099         } else
1100             headersout.print(cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(");
1101
1102         boolean printcomma=false;
1103         if (GENERATEPRECISEGC) {
1104             if (state.DSM) {
1105                 headersout.print("struct "+cn.getSafeSymbol()+lb.getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * "+paramsprefix);
1106             } else
1107                 headersout.print("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * "+paramsprefix);
1108             printcomma=true;
1109         }
1110
1111         if (state.DSM&&lb.isAtomic()) {
1112             if (printcomma)
1113                 headersout.print(", ");
1114             headersout.print("transrecord_t * trans");
1115             printcomma=true;
1116         }
1117
1118         /*  Output parameter list*/
1119         for(int i=0;i<objectparams.numPrimitives();i++) {
1120             TempDescriptor temp=objectparams.getPrimitive(i);
1121             if (printcomma)
1122                 headersout.print(", ");
1123             printcomma=true;
1124             if (temp.getType().isClass()||temp.getType().isArray())
1125                 headersout.print("struct " + temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol());
1126             else
1127                 headersout.print(temp.getType().getSafeSymbol()+" "+temp.getSafeSymbol());
1128         }
1129         headersout.println(");\n");
1130     }
1131
1132
1133     /** This function outputs (1) structures that parameters are
1134      * passed in (when PRECISE GC is enabled) and (2) function
1135      * prototypes for the tasks */
1136
1137     private void generateTaskStructs(PrintWriter output, PrintWriter headersout) {
1138         /* Cycle through tasks */
1139         Iterator taskit=state.getTaskSymbolTable().getDescriptorsIterator();
1140
1141         while(taskit.hasNext()) {
1142             /* Classify parameters */
1143             TaskDescriptor task=(TaskDescriptor)taskit.next();
1144             FlatMethod fm=state.getMethodFlat(task);
1145             generateTempStructs(fm, null);
1146
1147             ParamsObject objectparams=(ParamsObject) paramstable.get(task);
1148             TempObject objecttemps=(TempObject) tempstable.get(task);
1149
1150             /* Output parameter structure */
1151             if (GENERATEPRECISEGC) {
1152                 output.println("struct "+task.getSafeSymbol()+"_params {");
1153
1154                 output.println("  int size;");
1155                 output.println("  void * next;");
1156                 for(int i=0;i<objectparams.numPointers();i++) {
1157                     TempDescriptor temp=objectparams.getPointer(i);
1158                     output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
1159                 }
1160
1161                 output.println("};\n");
1162                 if ((objectparams.numPointers()+fm.numTags())>maxtaskparams) {
1163                     maxtaskparams=objectparams.numPointers()+fm.numTags();
1164                 }
1165             }
1166
1167             /* Output temp structure */
1168             if (GENERATEPRECISEGC) {
1169                 output.println("struct "+task.getSafeSymbol()+"_locals {");
1170                 output.println("  int size;");
1171                 output.println("  void * next;");
1172                 for(int i=0;i<objecttemps.numPointers();i++) {
1173                     TempDescriptor temp=objecttemps.getPointer(i);
1174                     if (temp.getType().isNull())
1175                         output.println("  void * "+temp.getSafeSymbol()+";");
1176                     else if(temp.getType().isTag())
1177                         output.println("  struct "+
1178                                        (new TypeDescriptor(typeutil.getClass(TypeUtil.TagClass))).getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
1179                     else
1180                         output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
1181                 }
1182                 output.println("};\n");
1183             }
1184
1185             /* Output task declaration */
1186             headersout.print("void " + task.getSafeSymbol()+"(");
1187
1188             boolean printcomma=false;
1189             if (GENERATEPRECISEGC) {
1190                 headersout.print("struct "+task.getSafeSymbol()+"_params * "+paramsprefix);
1191             } else
1192                 headersout.print("void * parameterarray[]");
1193             headersout.println(");\n");
1194         }
1195     }
1196
1197     /***** Generate code for FlatMethod fm. *****/
1198
1199     private void generateFlatMethod(FlatMethod fm, LocalityBinding lb, PrintWriter output) {
1200         MethodDescriptor md=fm.getMethod();
1201
1202         TaskDescriptor task=fm.getTask();
1203
1204         ClassDescriptor cn=md!=null?md.getClassDesc():null;
1205
1206         ParamsObject objectparams=(ParamsObject)paramstable.get(lb!=null?lb:md!=null?md:task);
1207         generateHeader(fm, lb, md!=null?md:task,output);
1208         TempObject objecttemp=(TempObject) tempstable.get(lb!=null?lb:md!=null?md:task);
1209         if (state.DSM&&lb.getHasAtomic()) {
1210             output.println("transrecord_t * trans;");
1211         }
1212
1213         if (GENERATEPRECISEGC) {
1214             if (md!=null&&state.DSM)
1215                 output.print("   struct "+cn.getSafeSymbol()+lb.getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_locals "+localsprefix+"={");
1216             else if (md!=null&&!state.DSM)
1217                 output.print("   struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_locals "+localsprefix+"={");
1218             else
1219                 output.print("   struct "+task.getSafeSymbol()+"_locals "+localsprefix+"={");
1220
1221             output.print(objecttemp.numPointers()+",");
1222             output.print(paramsprefix);
1223             for(int j=0;j<objecttemp.numPointers();j++)
1224                 output.print(", NULL");
1225             output.println("};");
1226         }
1227
1228         for(int i=0;i<objecttemp.numPrimitives();i++) {
1229             TempDescriptor td=objecttemp.getPrimitive(i);
1230             TypeDescriptor type=td.getType();
1231             if (type.isNull())
1232                 output.println("   void * "+td.getSafeSymbol()+";");
1233             else if (type.isClass()||type.isArray())
1234                 output.println("   struct "+type.getSafeSymbol()+" * "+td.getSafeSymbol()+";");
1235             else
1236                 output.println("   "+type.getSafeSymbol()+" "+td.getSafeSymbol()+";");
1237         }
1238
1239         /* Assign labels to FlatNode's if necessary.*/
1240
1241         Hashtable<FlatNode, Integer> nodetolabel=assignLabels(fm);
1242
1243         /* Check to see if we need to do a GC if this is a
1244          * multi-threaded program...*/
1245
1246         if (state.THREAD&&GENERATEPRECISEGC) {
1247             output.println("checkcollect(&"+localsprefix+");");
1248         }
1249
1250         /* Do the actual code generation */
1251         FlatNode current_node=null;
1252         HashSet tovisit=new HashSet();
1253         HashSet visited=new HashSet();
1254         tovisit.add(fm.getNext(0));
1255         while(current_node!=null||!tovisit.isEmpty()) {
1256             if (current_node==null) {
1257                 current_node=(FlatNode)tovisit.iterator().next();
1258                 tovisit.remove(current_node);
1259             }
1260             visited.add(current_node);
1261             if (nodetolabel.containsKey(current_node))
1262                 output.println("L"+nodetolabel.get(current_node)+":");
1263             if (state.INSTRUCTIONFAILURE) {
1264                 if (state.THREAD) {
1265                     output.println("if ((++instructioncount)>failurecount) {instructioncount=0;injectinstructionfailure();}");
1266                 }
1267                 else
1268                     output.println("if ((--instructioncount)==0) injectinstructionfailure();");
1269             }
1270             if (current_node.numNext()==0) {
1271                 output.print("   ");
1272                 generateFlatNode(fm, lb, current_node, output);
1273                 if (current_node.kind()!=FKind.FlatReturnNode) {
1274                     output.println("   return;");
1275                 }
1276                 current_node=null;
1277             } else if(current_node.numNext()==1) {
1278                 output.print("   ");
1279                 generateFlatNode(fm, lb, current_node, output);
1280                 FlatNode nextnode=current_node.getNext(0);
1281                 if (visited.contains(nextnode)) {
1282                     output.println("goto L"+nodetolabel.get(nextnode)+";");
1283                     current_node=null;
1284                 } else
1285                     current_node=nextnode;
1286             } else if (current_node.numNext()==2) {
1287                 /* Branch */
1288                 output.print("   ");
1289                 generateFlatCondBranch(fm, lb, (FlatCondBranch)current_node, "L"+nodetolabel.get(current_node.getNext(1)), output);
1290                 if (!visited.contains(current_node.getNext(1)))
1291                     tovisit.add(current_node.getNext(1));
1292                 if (visited.contains(current_node.getNext(0))) {
1293                     output.println("goto L"+nodetolabel.get(current_node.getNext(0))+";");
1294                     current_node=null;
1295                 } else
1296                     current_node=current_node.getNext(0);
1297             } else throw new Error();
1298         }
1299
1300         output.println("}\n\n");
1301     }
1302
1303     /** This method assigns labels to FlatNodes */
1304
1305     private Hashtable<FlatNode, Integer> assignLabels(FlatMethod fm) {
1306         HashSet tovisit=new HashSet();
1307         HashSet visited=new HashSet();
1308         int labelindex=0;
1309         Hashtable<FlatNode, Integer> nodetolabel=new Hashtable<FlatNode, Integer>();
1310         tovisit.add(fm.getNext(0));
1311
1312         /*Assign labels first.  A node needs a label if the previous
1313          * node has two exits or this node is a join point. */
1314
1315         while(!tovisit.isEmpty()) {
1316             FlatNode fn=(FlatNode)tovisit.iterator().next();
1317             tovisit.remove(fn);
1318             visited.add(fn);
1319             for(int i=0;i<fn.numNext();i++) {
1320                 FlatNode nn=fn.getNext(i);
1321                 if(i>0) {
1322                     //1) Edge >1 of node
1323                     nodetolabel.put(nn,new Integer(labelindex++));
1324                 }
1325                 if (!visited.contains(nn)&&!tovisit.contains(nn)) {
1326                     tovisit.add(nn);
1327                 } else {
1328                     //2) Join point
1329                     nodetolabel.put(nn,new Integer(labelindex++));
1330                 }
1331             }
1332         }
1333         return nodetolabel;
1334     }
1335
1336
1337     /** Generate text string that corresponds to the TempDescriptor td. */
1338     private String generateTemp(FlatMethod fm, TempDescriptor td, LocalityBinding lb) {
1339         MethodDescriptor md=fm.getMethod();
1340         TaskDescriptor task=fm.getTask();
1341         TempObject objecttemps=(TempObject) tempstable.get(lb!=null?lb:md!=null?md:task);
1342
1343         if (objecttemps.isLocalPrim(td)||objecttemps.isParamPrim(td)) {
1344             return td.getSafeSymbol();
1345         }
1346
1347         if (objecttemps.isLocalPtr(td)) {
1348             return localsprefix+"."+td.getSafeSymbol();
1349         }
1350
1351         if (objecttemps.isParamPtr(td)) {
1352             return paramsprefix+"->"+td.getSafeSymbol();
1353         }
1354         throw new Error();
1355     }
1356
1357     private void generateFlatNode(FlatMethod fm, LocalityBinding lb, FlatNode fn, PrintWriter output) {
1358         switch(fn.kind()) {
1359         case FKind.FlatAtomicEnterNode:
1360             generateFlatAtomicEnterNode(fm, lb, (FlatAtomicEnterNode) fn, output);
1361             return;
1362         case FKind.FlatAtomicExitNode:
1363             generateFlatAtomicExitNode(fm, lb, (FlatAtomicExitNode) fn, output);
1364             return;
1365         case FKind.FlatGlobalConvNode:
1366             generateFlatGlobalConvNode(fm, lb, (FlatGlobalConvNode) fn, output);
1367             return;
1368         case FKind.FlatTagDeclaration:
1369             generateFlatTagDeclaration(fm, lb, (FlatTagDeclaration) fn,output);
1370             return;
1371         case FKind.FlatCall:
1372             generateFlatCall(fm, lb, (FlatCall) fn,output);
1373             return;
1374         case FKind.FlatFieldNode:
1375             generateFlatFieldNode(fm, lb, (FlatFieldNode) fn,output);
1376             return;
1377         case FKind.FlatElementNode:
1378             generateFlatElementNode(fm, lb, (FlatElementNode) fn,output);
1379             return;
1380         case FKind.FlatSetElementNode:
1381             generateFlatSetElementNode(fm, lb, (FlatSetElementNode) fn,output);
1382             return;
1383         case FKind.FlatSetFieldNode:
1384             generateFlatSetFieldNode(fm, lb, (FlatSetFieldNode) fn,output);
1385             return;
1386         case FKind.FlatNew:
1387             generateFlatNew(fm, lb, (FlatNew) fn,output);
1388             return;
1389         case FKind.FlatOpNode:
1390             generateFlatOpNode(fm, lb, (FlatOpNode) fn,output);
1391             return;
1392         case FKind.FlatCastNode:
1393             generateFlatCastNode(fm, lb, (FlatCastNode) fn,output);
1394             return;
1395         case FKind.FlatLiteralNode:
1396             generateFlatLiteralNode(fm, lb, (FlatLiteralNode) fn,output);
1397             return;
1398         case FKind.FlatReturnNode:
1399             generateFlatReturnNode(fm, lb, (FlatReturnNode) fn,output);
1400             return;
1401         case FKind.FlatNop:
1402             output.println("/* nop */");
1403             return;
1404         case FKind.FlatBackEdge:
1405             if ((state.THREAD||state.DSM)&&GENERATEPRECISEGC) {
1406                 output.println("checkcollect(&"+localsprefix+");");
1407             } else
1408                 output.println("/* nop */");
1409             return;
1410         case FKind.FlatCheckNode:
1411             generateFlatCheckNode(fm, lb, (FlatCheckNode) fn, output);
1412             return;
1413         case FKind.FlatFlagActionNode:
1414             generateFlatFlagActionNode(fm, lb, (FlatFlagActionNode) fn, output);
1415             return;
1416         case FKind.FlatPrefetchNode:
1417             generateFlatPrefetchNode(fm,lb, (FlatPrefetchNode) fn, output);
1418             return;
1419         }
1420         throw new Error();
1421     }
1422
1423     public void generateFlatPrefetchNode(FlatMethod fm, LocalityBinding lb, FlatPrefetchNode fpn, PrintWriter output) {
1424         System.out.println("Inside generateFlatPrefetchNode()");
1425         if (state.PREFETCH) {
1426             System.out.println("The Prefetch pairs to be fetched are "+ fpn.hspp);
1427             Iterator it = fpn.hspp.iterator();
1428             for(;it.hasNext();) {
1429                  PrefetchPair pp = (PrefetchPair) it.next();
1430                  //TODO handle arrays in prefetch tuples, currently only handle fields
1431                  Integer statusbase = locality.getNodePreTempInfo(lb,fpn).get(pp.base);
1432                  System.out.println("DEBUG-> generateFlatPrefetchNode()" + statusbase);
1433                  if(statusbase == LocalityAnalysis.GLOBAL) {
1434                      // Generate oid for base
1435                  } else {
1436                      for(int i = 0; i<pp.desc.size(); i++) {
1437                         Object o = pp.desc.get(i);
1438                         if(!(o instanceof IndexDescriptor)) {
1439                                 FieldDescriptor fd = (FieldDescriptor) o;
1440                                 Integer statusfd = locality.getNodePreTempInfo(lb,fpn).get(fd);
1441                                 System.out.println("DEBUG-> generateFlatPrefetchNode() fd" + statusfd);
1442                                 //find out the locality of the fieldDescriptor
1443                                 if(statusfd == LocalityAnalysis.GLOBAL) {
1444                                         //generate oid for it
1445                                 }
1446                         }
1447                      }
1448                  }
1449              }
1450              //Each temp descriptor can be an oid
1451              //Find locality of each prefetch tuple in the FLatPrefetchNode
1452              //Separate them as Local or Global
1453              //generate oids and offset value for prefetch tuple
1454         }
1455     }
1456
1457     public void generateFlatGlobalConvNode(FlatMethod fm, LocalityBinding lb, FlatGlobalConvNode fgcn, PrintWriter output) {
1458         if (lb!=fgcn.getLocality())
1459             return;
1460         /* Have to generate flat globalconv */
1461         if (fgcn.getMakePtr()) {
1462             output.println(generateTemp(fm, fgcn.getSrc(),lb)+"=(void *)transRead(trans, (unsigned int) "+generateTemp(fm, fgcn.getSrc(),lb)+");");
1463         } else {
1464             /* Need to convert to OID */
1465             output.println(generateTemp(fm, fgcn.getSrc(),lb)+"=(void *)COMPOID("+generateTemp(fm, fgcn.getSrc(),lb)+");");
1466         }
1467     }
1468
1469     public void generateFlatAtomicEnterNode(FlatMethod fm,  LocalityBinding lb, FlatAtomicEnterNode faen, PrintWriter output) {
1470         /* Check to see if we need to generate code for this atomic */
1471         if (locality.getAtomic(lb).get(faen.getPrev(0)).intValue()>0)
1472             return;
1473         /* Backup the temps. */
1474         for(Iterator<TempDescriptor> tmpit=locality.getTemps(lb).get(faen).iterator();tmpit.hasNext();) {
1475             TempDescriptor tmp=tmpit.next();
1476             output.println(generateTemp(fm, backuptable.get(tmp),lb)+"="+generateTemp(fm,tmp,lb)+";");
1477         }
1478         output.println("goto transstart"+faen.getIdentifier()+";");
1479
1480         /******* Print code to retry aborted transaction *******/
1481         output.println("transretry"+faen.getIdentifier()+":");
1482
1483         /* Restore temps */
1484         for(Iterator<TempDescriptor> tmpit=locality.getTemps(lb).get(faen).iterator();tmpit.hasNext();) {
1485             TempDescriptor tmp=tmpit.next();
1486             output.println(generateTemp(fm, tmp,lb)+"="+generateTemp(fm,backuptable.get(tmp),lb)+";");
1487         }
1488
1489         /********* Need to revert local object store ********/
1490         String revertptr=generateTemp(fm, reverttable.get(lb),lb);
1491
1492         output.println("while ("+revertptr+") {");
1493         output.println("struct ___Object___ * tmpptr;");
1494         output.println("tmpptr="+revertptr+"->"+nextobjstr+";");
1495         output.println("REVERT_OBJ("+revertptr+");");
1496         output.println(revertptr+"=tmpptr;");
1497         output.println("}");
1498
1499         /******* Tell the runtime to start the transaction *******/
1500
1501         output.println("transstart"+faen.getIdentifier()+":");
1502         output.println("trans=transStart();");
1503     }
1504
1505     public void generateFlatAtomicExitNode(FlatMethod fm,  LocalityBinding lb, FlatAtomicExitNode faen, PrintWriter output) {
1506         /* Check to see if we need to generate code for this atomic */
1507         if (locality.getAtomic(lb).get(faen).intValue()>0)
1508             return;
1509         //store the revert list before we lose the transaction object
1510         String revertptr=generateTemp(fm, reverttable.get(lb),lb);
1511         output.println(revertptr+"=trans->revertlist;");
1512         output.println("if (transCommit(trans)) {");
1513         /* Transaction aborts if it returns true */
1514         output.println("goto transretry"+faen.getAtomicEnter().getIdentifier()+";");
1515         output.println("} else {");
1516         /* Need to commit local object store */
1517         output.println("while ("+revertptr+") {");
1518         output.println("struct ___Object___ * tmpptr;");
1519         output.println("tmpptr="+revertptr+"->"+nextobjstr+";");
1520         output.println("COMMIT_OBJ("+revertptr+");");
1521         output.println(revertptr+"=tmpptr;");
1522         output.println("}");
1523         output.println("}");
1524     }
1525
1526     private void generateFlatCheckNode(FlatMethod fm,  LocalityBinding lb, FlatCheckNode fcn, PrintWriter output) {
1527         if (state.CONSCHECK) {
1528             String specname=fcn.getSpec();
1529             String varname="repairstate___";
1530             output.println("{");
1531             output.println("struct "+specname+"_state * "+varname+"=allocate"+specname+"_state();");
1532
1533             TempDescriptor[] temps=fcn.getTemps();
1534             String[] vars=fcn.getVars();
1535             for(int i=0;i<temps.length;i++) {
1536                 output.println(varname+"->"+vars[i]+"=(unsigned int)"+generateTemp(fm, temps[i],lb)+";");
1537             }
1538
1539             output.println("if (doanalysis"+specname+"("+varname+")) {");
1540             output.println("free"+specname+"_state("+varname+");");
1541             output.println("} else {");
1542             output.println("/* Bad invariant */");
1543             output.println("free"+specname+"_state("+varname+");");
1544             output.println("abort_task();");
1545             output.println("}");
1546             output.println("}");
1547         }
1548     }
1549
1550     private void generateFlatCall(FlatMethod fm, LocalityBinding lb, FlatCall fc, PrintWriter output) {
1551         MethodDescriptor md=fc.getMethod();
1552         ParamsObject objectparams=(ParamsObject)paramstable.get(state.DSM?locality.getBinding(lb, fc):md);
1553         ClassDescriptor cn=md.getClassDesc();
1554         output.println("{");
1555         if (GENERATEPRECISEGC) {
1556             if (state.DSM) {
1557                 LocalityBinding fclb=locality.getBinding(lb, fc);
1558                 output.print("       struct "+cn.getSafeSymbol()+fclb.getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params __parameterlist__={");
1559             } else
1560                 output.print("       struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params __parameterlist__={");
1561
1562             output.print(objectparams.numPointers());
1563             output.print(", & "+localsprefix);
1564             if (fc.getThis()!=null) {
1565                 output.print(", ");
1566                 output.print("(struct "+md.getThis().getType().getSafeSymbol() +" *)"+ generateTemp(fm,fc.getThis(),lb));
1567             }
1568             for(int i=0;i<fc.numArgs();i++) {
1569                 Descriptor var=md.getParameter(i);
1570                 TempDescriptor paramtemp=(TempDescriptor)temptovar.get(var);
1571                 if (objectparams.isParamPtr(paramtemp)) {
1572                     TempDescriptor targ=fc.getArg(i);
1573                     output.print(", ");
1574                     TypeDescriptor td=md.getParamType(i);
1575                     if (td.isTag())
1576                         output.print("(struct "+(new TypeDescriptor(typeutil.getClass(TypeUtil.TagClass))).getSafeSymbol()  +" *)"+generateTemp(fm, targ,lb));
1577                     else
1578                         output.print("(struct "+md.getParamType(i).getSafeSymbol()  +" *)"+generateTemp(fm, targ,lb));
1579                 }
1580             }
1581             output.println("};");
1582         }
1583         output.print("       ");
1584
1585
1586         if (fc.getReturnTemp()!=null)
1587             output.print(generateTemp(fm,fc.getReturnTemp(),lb)+"=");
1588
1589         /* Do we need to do virtual dispatch? */
1590         if (md.isStatic()||md.getReturnType()==null||singleCall(fc.getThis().getType().getClassDesc(),md)) {
1591             //no
1592             if (state.DSM) {
1593                 LocalityBinding fclb=locality.getBinding(lb, fc);
1594                 output.print(cn.getSafeSymbol()+fclb.getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor());
1595             } else {
1596                 output.print(cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor());
1597             }
1598         } else {
1599             //yes
1600             output.print("((");
1601             if (md.getReturnType().isClass()||md.getReturnType().isArray())
1602                 output.print("struct " + md.getReturnType().getSafeSymbol()+" * ");
1603             else
1604                 output.print(md.getReturnType().getSafeSymbol()+" ");
1605             output.print("(*)(");
1606
1607             boolean printcomma=false;
1608             if (GENERATEPRECISEGC) {
1609                 if (state.DSM) {
1610                     LocalityBinding fclb=locality.getBinding(lb, fc);
1611                     output.print("struct "+cn.getSafeSymbol()+fclb.getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * ");
1612                 } else
1613                     output.print("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * ");
1614                 printcomma=true;
1615             }
1616
1617             for(int i=0;i<objectparams.numPrimitives();i++) {
1618                 TempDescriptor temp=objectparams.getPrimitive(i);
1619                 if (printcomma)
1620                     output.print(", ");
1621                 printcomma=true;
1622                 if (temp.getType().isClass()||temp.getType().isArray())
1623                     output.print("struct " + temp.getType().getSafeSymbol()+" * ");
1624                 else
1625                     output.print(temp.getType().getSafeSymbol());
1626             }
1627
1628             if (state.DSM) {
1629                 LocalityBinding fclb=locality.getBinding(lb, fc);
1630                 output.print("))virtualtable["+generateTemp(fm,fc.getThis(),lb)+"->type*"+maxcount+"+"+virtualcalls.getLocalityNumber(fclb)+"])");
1631             } else
1632                 output.print("))virtualtable["+generateTemp(fm,fc.getThis(),lb)+"->type*"+maxcount+"+"+virtualcalls.getMethodNumber(md)+"])");
1633         }
1634
1635         output.print("(");
1636         boolean needcomma=false;
1637         if (GENERATEPRECISEGC) {
1638             output.print("&__parameterlist__");
1639             needcomma=true;
1640         }
1641
1642         if (state.DSM&&locality.getBinding(lb,fc).isAtomic()) {
1643             if (needcomma)
1644                 output.print(",");
1645             output.print("trans");
1646             needcomma=true;
1647         }
1648
1649         if (!GENERATEPRECISEGC) {
1650             if (fc.getThis()!=null) {
1651                 TypeDescriptor ptd=md.getThis().getType();
1652                 if (needcomma)
1653                     output.print(",");
1654                 if (ptd.isClass()&&!ptd.isArray())
1655                     output.print("(struct "+ptd.getSafeSymbol()+" *) ");
1656                 output.print(generateTemp(fm,fc.getThis(),lb));
1657                 needcomma=true;
1658             }
1659         }
1660
1661         for(int i=0;i<fc.numArgs();i++) {
1662             Descriptor var=md.getParameter(i);
1663             TempDescriptor paramtemp=(TempDescriptor)temptovar.get(var);
1664             if (objectparams.isParamPrim(paramtemp)) {
1665                 TempDescriptor targ=fc.getArg(i);
1666                 if (needcomma)
1667                     output.print(", ");
1668
1669                 TypeDescriptor ptd=md.getParamType(i);
1670                 if (ptd.isClass()&&!ptd.isArray())
1671                     output.print("(struct "+ptd.getSafeSymbol()+" *) ");
1672                 output.print(generateTemp(fm, targ,lb));
1673                 needcomma=true;
1674             }
1675         }
1676         output.println(");");
1677         output.println("   }");
1678     }
1679
1680     private boolean singleCall(ClassDescriptor thiscd, MethodDescriptor md) {
1681         Set subclasses=typeutil.getSubClasses(thiscd);
1682         if (subclasses==null)
1683             return true;
1684         for(Iterator classit=subclasses.iterator();classit.hasNext();) {
1685             ClassDescriptor cd=(ClassDescriptor)classit.next();
1686             Set possiblematches=cd.getMethodTable().getSet(md.getSymbol());
1687             for(Iterator matchit=possiblematches.iterator();matchit.hasNext();) {
1688                 MethodDescriptor matchmd=(MethodDescriptor)matchit.next();
1689                 if (md.matches(matchmd))
1690                     return false;
1691             }
1692         }
1693         return true;
1694     }
1695
1696     private void generateFlatFieldNode(FlatMethod fm, LocalityBinding lb, FlatFieldNode ffn, PrintWriter output) {
1697         if (state.DSM) {
1698             Integer status=locality.getNodePreTempInfo(lb,ffn).get(ffn.getSrc());
1699             if (status==LocalityAnalysis.GLOBAL) {
1700                 String field=ffn.getField().getSafeSymbol();
1701                 String src=generateTemp(fm, ffn.getSrc(),lb);
1702                 String dst=generateTemp(fm, ffn.getDst(),lb);
1703
1704                 if (ffn.getField().getType().isPtr()) {
1705
1706                     //TODO: Uncomment this when we have runtime support
1707                     //if (ffn.getSrc()==ffn.getDst()) {
1708                     //output.println("{");
1709                     //output.println("void * temp="+src+";");
1710                     //output.println("if (temp&0x1) {");
1711                     //output.println("temp=(void *) transRead(trans, (unsigned int) temp);");
1712                     //output.println(src+"->"+field+"="+temp+";");
1713                     //output.println("}");
1714                     //output.println(dst+"=temp;");
1715                     //output.println("}");
1716                     //} else {
1717                     output.println(dst+"="+ src +"->"+field+ ";");
1718                     //output.println("if ("+dst+"&0x1) {");
1719                     output.println(dst+"=(void *) transRead(trans, (unsigned int) "+dst+");");
1720                     //output.println(src+"->"+field+"="+src+"->"+field+";");
1721                     //output.println("}");
1722                     //}
1723                 } else {
1724                     output.println(dst+"="+ src+"->"+field+";");
1725                 }
1726             } else if (status==LocalityAnalysis.LOCAL) {
1727                 output.println(generateTemp(fm, ffn.getDst(),lb)+"="+ generateTemp(fm,ffn.getSrc(),lb)+"->"+ ffn.getField().getSafeSymbol()+";");
1728             } else if (status==LocalityAnalysis.EITHER) {
1729                 //Code is reading from a null pointer
1730                 output.println("if ("+generateTemp(fm, ffn.getSrc(),lb)+") {");
1731                 output.println("printf(\"BIG ERROR\n\");exit(-1);}");
1732                 //This should throw a suitable null pointer error
1733                 output.println(generateTemp(fm, ffn.getDst(),lb)+"="+ generateTemp(fm,ffn.getSrc(),lb)+"->"+ ffn.getField().getSafeSymbol()+";");
1734             } else
1735                 throw new Error("Read from non-global/non-local in:"+lb.getExplanation());
1736         } else
1737             output.println(generateTemp(fm, ffn.getDst(),lb)+"="+ generateTemp(fm,ffn.getSrc(),lb)+"->"+ ffn.getField().getSafeSymbol()+";");
1738     }
1739
1740
1741     private void generateFlatSetFieldNode(FlatMethod fm, LocalityBinding lb, FlatSetFieldNode fsfn, PrintWriter output) {
1742         if (fsfn.getField().getSymbol().equals("length")&&fsfn.getDst().getType().isArray())
1743             throw new Error("Can't set array length");
1744         if (state.DSM && locality.getAtomic(lb).get(fsfn).intValue()>0) {
1745             Integer statussrc=locality.getNodePreTempInfo(lb,fsfn).get(fsfn.getSrc());
1746             Integer statusdst=locality.getNodeTempInfo(lb).get(fsfn).get(fsfn.getDst());
1747             boolean srcglobal=statussrc==LocalityAnalysis.GLOBAL;
1748
1749             String src=generateTemp(fm,fsfn.getSrc(),lb);
1750             String dst=generateTemp(fm,fsfn.getDst(),lb);
1751             if (srcglobal) {
1752                 output.println("{");
1753                 output.println("int srcoid=(int)"+src+"->"+oidstr+";");
1754             }
1755             if (statusdst.equals(LocalityAnalysis.GLOBAL)) {
1756                 String glbdst=dst;
1757                 //mark it dirty
1758                 output.println("*((unsigned int *)&("+dst+"->___localcopy___))|=DIRTY;");
1759                 if (srcglobal) {
1760                     output.println("*((unsigned int *)&("+glbdst+"->"+ fsfn.getField().getSafeSymbol()+"))=srcoid;");
1761                 } else
1762                     output.println(glbdst+"->"+ fsfn.getField().getSafeSymbol()+"="+ src+";");
1763             } else if (statusdst.equals(LocalityAnalysis.LOCAL)) {
1764                 /** Check if we need to copy */
1765                 output.println("if(!"+dst+"->"+localcopystr+") {");
1766                 /* Link object into list */
1767                 output.println(dst+"->"+nextobjstr+"=trans->revertlist;");
1768                 output.println("trans->revertlist=(struct ___Object___ *)"+dst+";");
1769                 if (GENERATEPRECISEGC)
1770                     output.println("COPY_OBJ((struct garbagelist *)&"+localsprefix+",(struct ___Object___ *)"+dst+");");
1771                 else
1772                     output.println("COPY_OBJ("+dst+");");
1773                 output.println("}");
1774                 if (srcglobal)
1775                     output.println(dst+"->"+ fsfn.getField().getSafeSymbol()+"=srcoid;");
1776                 else
1777                     output.println(dst+"->"+ fsfn.getField().getSafeSymbol()+"="+ src+";");
1778             } else if (statusdst.equals(LocalityAnalysis.EITHER)) {
1779                 //writing to a null...bad
1780                 output.println("if ("+dst+") {");
1781                 output.println("printf(\"BIG ERROR 2\n\");exit(-1);}");
1782                 if (srcglobal)
1783                     output.println(dst+"->"+ fsfn.getField().getSafeSymbol()+"=srcoid;");
1784                 else
1785                     output.println(dst+"->"+ fsfn.getField().getSafeSymbol()+"="+ src+";");
1786             }
1787             if (srcglobal) {
1788                 output.println("}");
1789             }
1790         } else {
1791             output.println(generateTemp(fm, fsfn.getDst(),lb)+"->"+ fsfn.getField().getSafeSymbol()+"="+ generateTemp(fm,fsfn.getSrc(),lb)+";");
1792         }
1793     }
1794
1795     private void generateFlatElementNode(FlatMethod fm, LocalityBinding lb, FlatElementNode fen, PrintWriter output) {
1796         TypeDescriptor elementtype=fen.getSrc().getType().dereference();
1797         String type="";
1798
1799         if (elementtype.isArray()||elementtype.isClass())
1800             type="void *";
1801         else
1802             type=elementtype.getSafeSymbol()+" ";
1803
1804         if (fen.needsBoundsCheck()) {
1805             output.println("if ("+generateTemp(fm, fen.getIndex(),lb)+"< 0 || "+generateTemp(fm, fen.getIndex(),lb)+" >= "+generateTemp(fm,fen.getSrc(),lb) + "->___length___)");
1806             output.println("failedboundschk();");
1807         }
1808
1809         output.println(generateTemp(fm, fen.getDst(),lb)+"=(("+ type+"*)(((char *) &("+ generateTemp(fm,fen.getSrc(),lb)+"->___length___))+sizeof(int)))["+generateTemp(fm, fen.getIndex(),lb)+"];");
1810     }
1811
1812     private void generateFlatSetElementNode(FlatMethod fm, LocalityBinding lb, FlatSetElementNode fsen, PrintWriter output) {
1813         //TODO: need dynamic check to make sure this assignment is actually legal
1814         //Because Object[] could actually be something more specific...ie. Integer[]
1815
1816         TypeDescriptor elementtype=fsen.getDst().getType().dereference();
1817         String type="";
1818
1819         if (elementtype.isArray()||elementtype.isClass())
1820             type="void *";
1821         else
1822             type=elementtype.getSafeSymbol()+" ";
1823
1824         if (fsen.needsBoundsCheck()) {
1825             output.println("if ("+generateTemp(fm, fsen.getIndex(),lb)+"< 0 || "+generateTemp(fm, fsen.getIndex(),lb)+" >= "+generateTemp(fm,fsen.getDst(),lb) + "->___length___)");
1826             output.println("failedboundschk();");
1827         }
1828
1829         output.println("(("+type +"*)(((char *) &("+ generateTemp(fm,fsen.getDst(),lb)+"->___length___))+sizeof(int)))["+generateTemp(fm, fsen.getIndex(),lb)+"]="+generateTemp(fm,fsen.getSrc(),lb)+";");
1830     }
1831
1832     private void generateFlatNew(FlatMethod fm, LocalityBinding lb, FlatNew fn, PrintWriter output) {
1833         if (fn.getType().isArray()) {
1834             int arrayid=state.getArrayNumber(fn.getType())+state.numClasses();
1835             if (fn.isGlobal()) {
1836                 output.println(generateTemp(fm,fn.getDst(),lb)+"=allocate_newarrayglobal(trans, "+arrayid+", "+generateTemp(fm, fn.getSize(),lb)+");");
1837             } else if (GENERATEPRECISEGC) {
1838                 output.println(generateTemp(fm,fn.getDst(),lb)+"=allocate_newarray(&"+localsprefix+", "+arrayid+", "+generateTemp(fm, fn.getSize(),lb)+");");
1839             } else {
1840                 output.println(generateTemp(fm,fn.getDst(),lb)+"=allocate_newarray("+arrayid+", "+generateTemp(fm, fn.getSize(),lb)+");");
1841             }
1842         } else {
1843             if (fn.isGlobal()) {
1844                 output.println(generateTemp(fm,fn.getDst(),lb)+"=allocate_newglobal(trans, "+fn.getType().getClassDesc().getId()+");");
1845             } else if (GENERATEPRECISEGC) {
1846                 output.println(generateTemp(fm,fn.getDst(),lb)+"=allocate_new(&"+localsprefix+", "+fn.getType().getClassDesc().getId()+");");
1847             } else {
1848                 output.println(generateTemp(fm,fn.getDst(),lb)+"=allocate_new("+fn.getType().getClassDesc().getId()+");");
1849             }
1850         }
1851     }
1852
1853     private void generateFlatTagDeclaration(FlatMethod fm, LocalityBinding lb, FlatTagDeclaration fn, PrintWriter output) {
1854         if (GENERATEPRECISEGC) {
1855             output.println(generateTemp(fm,fn.getDst(),lb)+"=allocate_tag(&"+localsprefix+", "+state.getTagId(fn.getType())+");");
1856         } else {
1857             output.println(generateTemp(fm,fn.getDst(),lb)+"=allocate_tag("+state.getTagId(fn.getType())+");");
1858         }
1859     }
1860
1861     private void generateFlatOpNode(FlatMethod fm, LocalityBinding lb, FlatOpNode fon, PrintWriter output) {
1862         if (fon.getRight()!=null)
1863             output.println(generateTemp(fm, fon.getDest(),lb)+" = "+generateTemp(fm, fon.getLeft(),lb)+fon.getOp().toString()+generateTemp(fm,fon.getRight(),lb)+";");
1864         else if (fon.getOp().getOp()==Operation.ASSIGN)
1865             output.println(generateTemp(fm, fon.getDest(),lb)+" = "+generateTemp(fm, fon.getLeft(),lb)+";");
1866         else if (fon.getOp().getOp()==Operation.UNARYPLUS)
1867             output.println(generateTemp(fm, fon.getDest(),lb)+" = "+generateTemp(fm, fon.getLeft(),lb)+";");
1868         else if (fon.getOp().getOp()==Operation.UNARYMINUS)
1869             output.println(generateTemp(fm, fon.getDest(),lb)+" = -"+generateTemp(fm, fon.getLeft(),lb)+";");
1870         else if (fon.getOp().getOp()==Operation.LOGIC_NOT)
1871             output.println(generateTemp(fm, fon.getDest(),lb)+" = !"+generateTemp(fm, fon.getLeft(),lb)+";");
1872         else if (fon.getOp().getOp()==Operation.ISAVAILABLE) {
1873             output.println(generateTemp(fm, fon.getDest(),lb)+" = "+generateTemp(fm, fon.getLeft(),lb)+"->fses==NULL;");
1874         } else
1875             output.println(generateTemp(fm, fon.getDest(),lb)+fon.getOp().toString()+generateTemp(fm, fon.getLeft(),lb)+";");
1876     }
1877
1878     private void generateFlatCastNode(FlatMethod fm, LocalityBinding lb, FlatCastNode fcn, PrintWriter output) {
1879         /* TODO: Do type check here */
1880         if (fcn.getType().isArray()) {
1881             throw new Error();
1882         } else if (fcn.getType().isClass())
1883             output.println(generateTemp(fm,fcn.getDst(),lb)+"=(struct "+fcn.getType().getSafeSymbol()+" *)"+generateTemp(fm,fcn.getSrc(),lb)+";");
1884         else
1885             output.println(generateTemp(fm,fcn.getDst(),lb)+"=("+fcn.getType().getSafeSymbol()+")"+generateTemp(fm,fcn.getSrc(),lb)+";");
1886     }
1887
1888     private void generateFlatLiteralNode(FlatMethod fm, LocalityBinding lb, FlatLiteralNode fln, PrintWriter output) {
1889         if (fln.getValue()==null)
1890             output.println(generateTemp(fm, fln.getDst(),lb)+"=0;");
1891         else if (fln.getType().getSymbol().equals(TypeUtil.StringClass)) {
1892             if (GENERATEPRECISEGC) {
1893                 output.println(generateTemp(fm, fln.getDst(),lb)+"=NewString(&"+localsprefix+", \""+FlatLiteralNode.escapeString((String)fln.getValue())+"\","+((String)fln.getValue()).length()+");");
1894             } else {
1895                 output.println(generateTemp(fm, fln.getDst(),lb)+"=NewString(\""+FlatLiteralNode.escapeString((String)fln.getValue())+"\","+((String)fln.getValue()).length()+");");
1896             }
1897         } else if (fln.getType().isBoolean()) {
1898             if (((Boolean)fln.getValue()).booleanValue())
1899                 output.println(generateTemp(fm, fln.getDst(),lb)+"=1;");
1900             else
1901                 output.println(generateTemp(fm, fln.getDst(),lb)+"=0;");
1902         } else if (fln.getType().isChar()) {
1903             String st=FlatLiteralNode.escapeString(fln.getValue().toString());
1904             output.println(generateTemp(fm, fln.getDst(),lb)+"='"+st+"';");
1905         } else
1906             output.println(generateTemp(fm, fln.getDst(),lb)+"="+fln.getValue()+";");
1907     }
1908
1909     private void generateFlatReturnNode(FlatMethod fm, LocalityBinding lb, FlatReturnNode frn, PrintWriter output) {
1910         if (frn.getReturnTemp()!=null) {
1911             if (frn.getReturnTemp().getType().isPtr())
1912                 output.println("return (struct "+fm.getMethod().getReturnType().getSafeSymbol()+"*)"+generateTemp(fm, frn.getReturnTemp(), lb)+";");
1913             else
1914                 output.println("return "+generateTemp(fm, frn.getReturnTemp(), lb)+";");
1915         } else
1916             output.println("return;");
1917     }
1918
1919     private void generateFlatCondBranch(FlatMethod fm, LocalityBinding lb, FlatCondBranch fcb, String label, PrintWriter output) {
1920         output.println("if (!"+generateTemp(fm, fcb.getTest(),lb)+") goto "+label+";");
1921     }
1922
1923     /** This method generates header information for the method or
1924      * task referenced by the Descriptor des. */
1925
1926     private void generateHeader(FlatMethod fm, LocalityBinding lb, Descriptor des, PrintWriter output) {
1927         /* Print header */
1928         ParamsObject objectparams=(ParamsObject)paramstable.get(lb!=null?lb:des);
1929         MethodDescriptor md=null;
1930         TaskDescriptor task=null;
1931         if (des instanceof MethodDescriptor)
1932             md=(MethodDescriptor) des;
1933         else
1934             task=(TaskDescriptor) des;
1935
1936         ClassDescriptor cn=md!=null?md.getClassDesc():null;
1937
1938         if (md!=null&&md.getReturnType()!=null) {
1939             if (md.getReturnType().isClass()||md.getReturnType().isArray())
1940                 output.print("struct " + md.getReturnType().getSafeSymbol()+" * ");
1941             else
1942                 output.print(md.getReturnType().getSafeSymbol()+" ");
1943         } else
1944             //catch the constructor case
1945             output.print("void ");
1946         if (md!=null) {
1947             if (state.DSM) {
1948                 output.print(cn.getSafeSymbol()+lb.getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(");
1949             } else
1950                 output.print(cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(");
1951         } else
1952             output.print(task.getSafeSymbol()+"(");
1953
1954         boolean printcomma=false;
1955         if (GENERATEPRECISEGC) {
1956             if (md!=null) {
1957                 if (state.DSM) {
1958                     output.print("struct "+cn.getSafeSymbol()+lb.getSignature()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * "+paramsprefix);
1959                 } else
1960                     output.print("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * "+paramsprefix);
1961             } else
1962                 output.print("struct "+task.getSafeSymbol()+"_params * "+paramsprefix);
1963             printcomma=true;
1964         }
1965
1966         if (state.DSM&&lb.isAtomic()) {
1967             if (printcomma)
1968                 output.print(", ");
1969             output.print("transrecord_t * trans");
1970             printcomma=true;
1971         }
1972
1973         if (md!=null) {
1974             /* Method */
1975             for(int i=0;i<objectparams.numPrimitives();i++) {
1976                 TempDescriptor temp=objectparams.getPrimitive(i);
1977                 if (printcomma)
1978                     output.print(", ");
1979                 printcomma=true;
1980                 if (temp.getType().isClass()||temp.getType().isArray())
1981                     output.print("struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol());
1982                 else
1983                     output.print(temp.getType().getSafeSymbol()+" "+temp.getSafeSymbol());
1984             }
1985             output.println(") {");
1986         } else if (!GENERATEPRECISEGC) {
1987             /* Imprecise Task */
1988             output.println("void * parameterarray[]) {");
1989             /* Unpack variables */
1990             for(int i=0;i<objectparams.numPrimitives();i++) {
1991                 TempDescriptor temp=objectparams.getPrimitive(i);
1992                 output.println("struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+"=parameterarray["+i+"];");
1993             }
1994             for(int i=0;i<fm.numTags();i++) {
1995                 TempDescriptor temp=fm.getTag(i);
1996                 int offset=i+objectparams.numPrimitives();
1997                 output.println("struct ___TagDescriptor___ * "+temp.getSafeSymbol()+"=parameterarray["+offset+"];");
1998             }
1999
2000             if ((objectparams.numPrimitives()+fm.numTags())>maxtaskparams)
2001                 maxtaskparams=objectparams.numPrimitives()+fm.numTags();
2002         } else output.println(") {");
2003     }
2004
2005     public void generateFlatFlagActionNode(FlatMethod fm, LocalityBinding lb, FlatFlagActionNode ffan, PrintWriter output) {
2006         output.println("/* FlatFlagActionNode */");
2007
2008
2009         /* Process tag changes */
2010         Relation tagsettable=new Relation();
2011         Relation tagcleartable=new Relation();
2012
2013         Iterator tagsit=ffan.getTempTagPairs();
2014         while (tagsit.hasNext()) {
2015             TempTagPair ttp=(TempTagPair) tagsit.next();
2016             TempDescriptor objtmp=ttp.getTemp();
2017             TagDescriptor tag=ttp.getTag();
2018             TempDescriptor tagtmp=ttp.getTagTemp();
2019             boolean tagstatus=ffan.getTagChange(ttp);
2020             if (tagstatus) {
2021                 tagsettable.put(objtmp, tagtmp);
2022             } else {
2023                 tagcleartable.put(objtmp, tagtmp);
2024             }
2025         }
2026
2027
2028         Hashtable flagandtable=new Hashtable();
2029         Hashtable flagortable=new Hashtable();
2030
2031         /* Process flag changes */
2032         Iterator flagsit=ffan.getTempFlagPairs();
2033         while(flagsit.hasNext()) {
2034             TempFlagPair tfp=(TempFlagPair)flagsit.next();
2035             TempDescriptor temp=tfp.getTemp();
2036             Hashtable flagtable=(Hashtable)flagorder.get(temp.getType().getClassDesc());
2037             FlagDescriptor flag=tfp.getFlag();
2038             if (flag==null) {
2039                 //Newly allocate objects that don't set any flags case
2040                 if (flagortable.containsKey(temp)) {
2041                     throw new Error();
2042                 }
2043                 int mask=0;
2044                 flagortable.put(temp,new Integer(mask));
2045             } else {
2046                 int flagid=1<<((Integer)flagtable.get(flag)).intValue();
2047                 boolean flagstatus=ffan.getFlagChange(tfp);
2048                 if (flagstatus) {
2049                     int mask=0;
2050                     if (flagortable.containsKey(temp)) {
2051                         mask=((Integer)flagortable.get(temp)).intValue();
2052                     }
2053                     mask|=flagid;
2054                     flagortable.put(temp,new Integer(mask));
2055                 } else {
2056                     int mask=0xFFFFFFFF;
2057                     if (flagandtable.containsKey(temp)) {
2058                         mask=((Integer)flagandtable.get(temp)).intValue();
2059                     }
2060                     mask&=(0xFFFFFFFF^flagid);
2061                     flagandtable.put(temp,new Integer(mask));
2062                 }
2063             }
2064         }
2065
2066
2067         HashSet flagtagset=new HashSet();
2068         flagtagset.addAll(flagortable.keySet());
2069         flagtagset.addAll(flagandtable.keySet());
2070         flagtagset.addAll(tagsettable.keySet());
2071         flagtagset.addAll(tagcleartable.keySet());
2072
2073         Iterator ftit=flagtagset.iterator();
2074         while(ftit.hasNext()) {
2075             TempDescriptor temp=(TempDescriptor)ftit.next();
2076
2077
2078             Set tagtmps=tagcleartable.get(temp);
2079             if (tagtmps!=null) {
2080                 Iterator tagit=tagtmps.iterator();
2081                 while(tagit.hasNext()) {
2082                     TempDescriptor tagtmp=(TempDescriptor)tagit.next();
2083                     if (GENERATEPRECISEGC)
2084                         output.println("tagclear(&"+localsprefix+", (struct ___Object___ *)"+generateTemp(fm, temp,lb)+", "+generateTemp(fm,tagtmp,lb)+");");
2085                     else
2086                         output.println("tagclear((struct ___Object___ *)"+generateTemp(fm, temp,lb)+", "+generateTemp(fm,tagtmp,lb)+");");
2087                 }
2088             }
2089
2090             tagtmps=tagsettable.get(temp);
2091             if (tagtmps!=null) {
2092                 Iterator tagit=tagtmps.iterator();
2093                 while(tagit.hasNext()) {
2094                     TempDescriptor tagtmp=(TempDescriptor)tagit.next();
2095                     if (GENERATEPRECISEGC)
2096                         output.println("tagset(&"+localsprefix+", (struct ___Object___ *)"+generateTemp(fm, temp,lb)+", "+generateTemp(fm,tagtmp,lb)+");");
2097                     else
2098                         output.println("tagset((struct ___Object___ *)"+generateTemp(fm, temp, lb)+", "+generateTemp(fm,tagtmp, lb)+");");
2099                 }
2100             }
2101
2102             int ormask=0;
2103             int andmask=0xFFFFFFF;
2104
2105             if (flagortable.containsKey(temp))
2106                 ormask=((Integer)flagortable.get(temp)).intValue();
2107             if (flagandtable.containsKey(temp))
2108                 andmask=((Integer)flagandtable.get(temp)).intValue();
2109             if (ffan.getTaskType()==FlatFlagActionNode.NEWOBJECT) {
2110                 output.println("flagorandinit("+generateTemp(fm, temp, lb)+", 0x"+Integer.toHexString(ormask)+", 0x"+Integer.toHexString(andmask)+");");
2111             } else {
2112                 output.println("flagorand("+generateTemp(fm, temp, lb)+", 0x"+Integer.toHexString(ormask)+", 0x"+Integer.toHexString(andmask)+");");
2113             }
2114         }
2115     }
2116
2117     void generateOptionalHeader(PrintWriter headers) {
2118
2119          //GENERATE HEADERS
2120          headers.println("#include \"task.h\"\n\n");
2121          headers.println("#ifndef _OPTIONAL_STRUCT_");
2122          headers.println("#define _OPTIONAL_STRUCT_");
2123
2124          //STRUCT PREDICATEMEMBER
2125          headers.println("struct predicatemember{");
2126          headers.println("int type;");
2127          headers.println("int numdnfterms;");
2128          headers.println("int * flags;");
2129          headers.println("int numtags;");
2130          headers.println("int * tags;\n};\n\n");
2131
2132          //STRUCT OPTIONALTASKDESCRIPTOR
2133          headers.println("struct optionaltaskdescriptor{");
2134          headers.println("struct taskdescriptor * task;");
2135          headers.println("int index;");
2136          headers.println("int numenterflags;");
2137          headers.println("int * enterflags;");
2138          headers.println("int numpredicatemembers;");
2139          headers.println("struct predicatemember ** predicatememberarray;");
2140          headers.println("};\n\n");
2141
2142          //STRUCT TASKFAILURE
2143          headers.println("struct taskfailure {");
2144          headers.println("struct taskdescriptor * task;");
2145          headers.println("int index;");
2146          headers.println("int numoptionaltaskdescriptors;");
2147          headers.println("struct optionaltaskdescriptor ** optionaltaskdescriptorarray;\n};\n\n");
2148
2149          //STRUCT FSANALYSISWRAPPER
2150          headers.println("struct fsanalysiswrapper{");
2151          headers.println("int  flags;");
2152          headers.println("int numtags;");
2153          headers.println("int * tags;");
2154          headers.println("int numtaskfailures;");
2155          headers.println("struct taskfailure ** taskfailurearray;");
2156          headers.println("int numoptionaltaskdescriptors;");
2157          headers.println("struct optionaltaskdescriptor ** optionaltaskdescriptorarray;\n};\n\n");
2158
2159          //STRUCT CLASSANALYSISWRAPPER
2160          headers.println("struct classanalysiswrapper{");
2161          headers.println("int type;");
2162          headers.println("int numotd;");
2163          headers.println("struct optionaltaskdescriptor ** otdarray;");
2164          headers.println("int numfsanalysiswrappers;");
2165          headers.println("struct fsanalysiswrapper ** fsanalysiswrapperarray;\n};");
2166
2167          headers.println("extern struct classanalysiswrapper * classanalysiswrapperarray[];");
2168
2169          Iterator taskit=state.getTaskSymbolTable().getDescriptorsIterator();
2170          while(taskit.hasNext()) {
2171              TaskDescriptor td=(TaskDescriptor)taskit.next();
2172              headers.println("extern struct taskdescriptor task_"+td.getSafeSymbol()+";");
2173          }
2174
2175     }
2176
2177     //CHECK OVER THIS -- THERE COULD BE SOME ERRORS HERE
2178     int generateOptionalPredicate(Predicate predicate, OptionalTaskDescriptor otd, ClassDescriptor cdtemp, PrintWriter output) {
2179         int predicateindex = 0;
2180         //iterate through the classes concerned by the predicate
2181         Set c_vard = predicate.vardescriptors;
2182         Hashtable<TempDescriptor, Integer> slotnumber=new Hashtable<TempDescriptor, Integer>();
2183         int current_slot=0;
2184
2185         for(Iterator vard_it = c_vard.iterator(); vard_it.hasNext();){
2186             VarDescriptor vard = (VarDescriptor)vard_it.next();
2187             TypeDescriptor typed = vard.getType();
2188
2189             //generate for flags
2190             HashSet fen_hashset = predicate.flags.get(vard.getSymbol());
2191             output.println("int predicateflags_"+predicateindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"[]={");
2192             int numberterms=0;
2193             if (fen_hashset!=null){
2194                 for (Iterator fen_it = fen_hashset.iterator(); fen_it.hasNext();){
2195                     FlagExpressionNode fen = (FlagExpressionNode)fen_it.next();
2196                     if (fen!=null) {
2197                         DNFFlag dflag=fen.getDNF();
2198                         numberterms+=dflag.size();
2199
2200                         Hashtable flags=(Hashtable)flagorder.get(typed.getClassDesc());
2201
2202                         for(int j=0;j<dflag.size();j++) {
2203                             if (j!=0)
2204                                 output.println(",");
2205                             Vector term=dflag.get(j);
2206                             int andmask=0;
2207                             int checkmask=0;
2208                             for(int k=0;k<term.size();k++) {
2209                                 DNFFlagAtom dfa=(DNFFlagAtom)term.get(k);
2210                                 FlagDescriptor fd=dfa.getFlag();
2211                                 boolean negated=dfa.getNegated();
2212                                 int flagid=1<<((Integer)flags.get(fd)).intValue();
2213                                 andmask|=flagid;
2214                                 if (!negated)
2215                                     checkmask|=flagid;
2216                             }
2217                             output.print("/*andmask*/0x"+Integer.toHexString(andmask)+", /*checkmask*/0x"+Integer.toHexString(checkmask));
2218                         }
2219                     }
2220                 }
2221             }
2222             output.println("};\n");
2223
2224             //generate for tags
2225             TagExpressionList tagel = predicate.tags.get(vard.getSymbol());
2226             output.println("int predicatetags_"+predicateindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"[]={");
2227             int numtags = 0;
2228             if (tagel!=null){
2229                 for(int j=0;j<tagel.numTags();j++) {
2230                     if (j!=0)
2231                         output.println(",");
2232                     TempDescriptor tmp=tagel.getTemp(j);
2233                     if (!slotnumber.containsKey(tmp)) {
2234                         Integer slotint=new Integer(current_slot++);
2235                         slotnumber.put(tmp,slotint);
2236                     }
2237                     int slot=slotnumber.get(tmp).intValue();
2238                     output.println("/* slot */"+ slot+", /*tagid*/"+state.getTagId(tmp.getTag()));
2239                 }
2240                 numtags = tagel.numTags();
2241             }
2242             output.println("};");
2243
2244             //store the result into a predicatemember struct
2245             output.println("struct predicatemember predicatemember_"+predicateindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"={");
2246             output.println("/*type*/"+typed.getClassDesc().getId()+",");
2247             output.println("/* number of dnf terms */"+numberterms+",");
2248             output.println("predicateflags_"+predicateindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+",");
2249             output.println("/* number of tag */"+numtags+",");
2250             output.println("predicatetags_"+predicateindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+",");
2251             output.println("};\n");
2252             predicateindex++;
2253         }
2254
2255
2256         //generate an array that stores the entire predicate
2257         output.println("struct predicatemember * predicatememberarray_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"[]={");
2258         for( int j = 0; j<predicateindex; j++){
2259             if( j != predicateindex-1)output.println("&predicatemember_"+j+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+",");
2260             else output.println("&predicatemember_"+j+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol());
2261         }
2262         output.println("};\n");
2263         return predicateindex;
2264     }
2265
2266
2267      void generateOptionalArrays(PrintWriter output, PrintWriter headers, Hashtable<ClassDescriptor, Hashtable<FlagState, Set<OptionalTaskDescriptor>>> safeexecution, Hashtable optionaltaskdescriptors) {
2268          generateOptionalHeader(headers);
2269          //GENERATE STRUCTS
2270          output.println("#include \"optionalstruct.h\"\n\n");
2271          output.println("#include \"stdlib.h\"\n");
2272
2273          HashSet processedcd = new HashSet();
2274          int maxotd=0;
2275          Enumeration e = safeexecution.keys();
2276          while (e.hasMoreElements()) {
2277              int numotd=0;
2278              //get the class
2279              ClassDescriptor cdtemp=(ClassDescriptor)e.nextElement();
2280              Hashtable flaginfo=(Hashtable)flagorder.get(cdtemp);//will be used several times
2281
2282              //Generate the struct of optionals
2283              Collection c_otd = ((Hashtable)optionaltaskdescriptors.get(cdtemp)).values();
2284              numotd = c_otd.size();
2285              if(maxotd<numotd) maxotd = numotd;
2286              if( !c_otd.isEmpty() ){
2287                  for(Iterator otd_it = c_otd.iterator(); otd_it.hasNext();){
2288                      OptionalTaskDescriptor otd = (OptionalTaskDescriptor)otd_it.next();
2289
2290                      //generate the int arrays for the predicate
2291                      Predicate predicate = otd.predicate;
2292                      int predicateindex = generateOptionalPredicate(predicate, otd, cdtemp, output);
2293                      TreeSet<Integer> fsset=new TreeSet<Integer>();
2294                      //iterate through possible FSes corresponding to
2295                      //the state when entering
2296
2297                      for(Iterator fses = otd.enterflagstates.iterator(); fses.hasNext();){
2298                          FlagState fs = (FlagState)fses.next();
2299                          int flagid=0;
2300                          for(Iterator flags = fs.getFlags(); flags.hasNext();){
2301                              FlagDescriptor flagd = (FlagDescriptor)flags.next();
2302                              int id=1<<((Integer)flaginfo.get(flagd)).intValue();
2303                              flagid|=id;
2304                          }
2305                          fsset.add(new Integer(flagid));
2306                          //tag information not needed because tag
2307                          //changes are not tolerated.
2308                      }
2309
2310                      output.println("int enterflag_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"[]={");
2311                      boolean needcomma=false;
2312                      for(Iterator<Integer> it=fsset.iterator();it.hasNext();) {
2313                          if(needcomma)
2314                              output.print(", ");
2315                          output.println(it.next());
2316                      }
2317
2318                      output.println("};\n");
2319
2320
2321                      //generate optionaltaskdescriptor that actually
2322                      //includes exit fses, predicate and the task
2323                      //concerned
2324                      output.println("struct optionaltaskdescriptor optionaltaskdescriptor_"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"={");
2325                      output.println("&task_"+otd.td.getSafeSymbol()+",");
2326                      output.println("/*index*/"+otd.getIndex()+",");
2327                      output.println("/*number of enter flags*/"+fsset.size()+",");
2328                      output.println("enterflag_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+",");
2329                      output.println("/*number of members */"+predicateindex+",");
2330                      output.println("predicatememberarray_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+",");
2331                      output.println("};\n");
2332                  }
2333              } else
2334                  continue;
2335              // if there are no optionals, there is no need to build the rest of the struct
2336
2337              output.println("struct optionaltaskdescriptor * otdarray"+cdtemp.getSafeSymbol()+"[]={");
2338              c_otd = ((Hashtable)optionaltaskdescriptors.get(cdtemp)).values();
2339              if( !c_otd.isEmpty() ){
2340                  boolean needcomma=false;
2341                  for(Iterator otd_it = c_otd.iterator(); otd_it.hasNext();){
2342                      OptionalTaskDescriptor otd = (OptionalTaskDescriptor)otd_it.next();
2343                      if(needcomma)
2344                          output.println(",");
2345                      needcomma=true;
2346                      output.println("&optionaltaskdescriptor_"+otd.getuid()+"_"+cdtemp.getSafeSymbol());
2347                  }
2348              }
2349              output.println("};\n");
2350
2351              //get all the possible flagstates reachable by an object
2352              Hashtable hashtbtemp = safeexecution.get(cdtemp);
2353              int fscounter = 0;
2354              TreeSet fsts=new TreeSet(new FlagComparator(flaginfo));
2355              fsts.addAll(hashtbtemp.keySet());
2356              for(Iterator fsit=fsts.iterator();fsit.hasNext();) {
2357                  FlagState fs = (FlagState)fsit.next();
2358                  fscounter++;
2359
2360                  //get the set of OptionalTaskDescriptors corresponding
2361                  HashSet<OptionalTaskDescriptor> availabletasks = (HashSet<OptionalTaskDescriptor>)hashtbtemp.get(fs);
2362                  //iterate through the OptionalTaskDescriptors and
2363                  //store the pointers to the optionals struct (see on
2364                  //top) into an array
2365
2366                  output.println("struct optionaltaskdescriptor * optionaltaskdescriptorarray_FS"+fscounter+"_"+cdtemp.getSafeSymbol()+"[] = {");
2367                  for(Iterator<OptionalTaskDescriptor> mos = ordertd(availabletasks).iterator(); mos.hasNext();){
2368                      OptionalTaskDescriptor mm = mos.next();
2369                      if(!mos.hasNext())
2370                          output.println("&optionaltaskdescriptor_"+mm.getuid()+"_"+cdtemp.getSafeSymbol());
2371                      else
2372                          output.println("&optionaltaskdescriptor_"+mm.getuid()+"_"+cdtemp.getSafeSymbol()+",");
2373                  }
2374
2375                  output.println("};\n");
2376
2377                  //process flag information (what the flag after failure is) so we know what optionaltaskdescriptors to choose.
2378
2379                  int flagid=0;
2380                  for(Iterator flags = fs.getFlags(); flags.hasNext();){
2381                      FlagDescriptor flagd = (FlagDescriptor)flags.next();
2382                      int id=1<<((Integer)flaginfo.get(flagd)).intValue();
2383                      flagid|=id;
2384                  }
2385
2386                  //process tag information
2387
2388                  int tagcounter = 0;
2389                  boolean first = true;
2390                  Enumeration tag_enum = fs.getTags();
2391                  output.println("int tags_FS"+fscounter+"_"+cdtemp.getSafeSymbol()+"[]={");
2392                  while(tag_enum.hasMoreElements()){
2393                      tagcounter++;
2394                      TagDescriptor tagd = (TagDescriptor)tag_enum.nextElement();
2395                      if(first==true)
2396                          first = false;
2397                      else
2398                          output.println(", ");
2399                      output.println("/*tagid*/"+state.getTagId(tagd));
2400                  }
2401                  output.println("};");
2402
2403                  Set<TaskIndex> tiset=sa.getTaskIndex(fs);
2404                  for(Iterator<TaskIndex> itti=tiset.iterator();itti.hasNext();) {
2405                      TaskIndex ti=itti.next();
2406                      if (ti.isRuntime())
2407                          continue;
2408
2409                      Set<OptionalTaskDescriptor> otdset=sa.getOptions(fs, ti);
2410
2411                      output.print("struct optionaltaskdescriptor * optionaltaskfailure_FS"+fscounter+"_"+ti.getTask().getSafeSymbol()+"_"+ti.getIndex()+"_array[] = {");
2412                      boolean needcomma=false;
2413                      for(Iterator<OptionalTaskDescriptor> otdit=ordertd(otdset).iterator();otdit.hasNext();) {
2414                          OptionalTaskDescriptor otd=otdit.next();
2415                          if(needcomma)
2416                              output.print(", ");
2417                          needcomma=true;
2418                          output.println("&optionaltaskdescriptor_"+otd.getuid()+"_"+cdtemp.getSafeSymbol());
2419                      }
2420                      output.println("};");
2421
2422                      output.print("struct taskfailure taskfailure_FS"+fscounter+"_"+ti.getTask().getSafeSymbol()+"_"+ti.getIndex()+" = {");
2423                      output.print("&task_"+ti.getTask().getSafeSymbol()+", ");
2424                      output.print(ti.getIndex()+", ");
2425                      output.print(otdset.size()+", ");
2426                      output.print("optionaltaskfailure_FS"+fscounter+"_"+ti.getTask().getSafeSymbol()+"_"+ti.getIndex()+"_array");
2427                      output.println("};");
2428                  }
2429
2430                  tiset=sa.getTaskIndex(fs);
2431                  boolean needcomma=false;
2432                  int runtimeti=0;
2433                  output.println("struct taskfailure * taskfailurearray"+fscounter+"_"+cdtemp.getSafeSymbol()+"[]={");
2434                  for(Iterator<TaskIndex> itti=tiset.iterator();itti.hasNext();) {
2435                      TaskIndex ti=itti.next();
2436                      if (ti.isRuntime()) {
2437                          runtimeti++;
2438                          continue;
2439                      }
2440                      if (needcomma)
2441                          output.print(", ");
2442                      needcomma=true;
2443                      output.print("&taskfailure_FS"+fscounter+"_"+ti.getTask().getSafeSymbol()+"_"+ti.getIndex());
2444                  }
2445                  output.println("};\n");
2446
2447                  //Store the result in fsanalysiswrapper
2448
2449                  output.println("struct fsanalysiswrapper fsanalysiswrapper_FS"+fscounter+"_"+cdtemp.getSafeSymbol()+"={");
2450                  output.println("/*flag*/"+flagid+",");
2451                  output.println("/* number of tags*/"+tagcounter+",");
2452                  output.println("tags_FS"+fscounter+"_"+cdtemp.getSafeSymbol()+",");
2453                  output.println("/* numtask failures */"+(tiset.size()-runtimeti)+",");
2454                  output.println("taskfailurearray"+fscounter+"_"+cdtemp.getSafeSymbol()+",");
2455                  output.println("/* number of optionaltaskdescriptors */"+availabletasks.size()+",");
2456                  output.println("optionaltaskdescriptorarray_FS"+fscounter+"_"+cdtemp.getSafeSymbol());
2457                  output.println("};\n");
2458
2459              }
2460
2461              //Build the array of fsanalysiswrappers
2462              output.println("struct fsanalysiswrapper * fsanalysiswrapperarray_"+cdtemp.getSafeSymbol()+"[] = {");
2463              boolean needcomma=false;
2464              for(int i = 0; i<fscounter; i++){
2465                  if (needcomma) output.print(",");
2466                  output.println("&fsanalysiswrapper_FS"+(i+1)+"_"+cdtemp.getSafeSymbol());
2467                  needcomma=true;
2468              }
2469              output.println("};");
2470
2471              //Build the classanalysiswrapper referring to the previous array
2472              output.println("struct classanalysiswrapper classanalysiswrapper_"+cdtemp.getSafeSymbol()+"={");
2473              output.println("/*type*/"+cdtemp.getId()+",");
2474              output.println("/*numotd*/"+numotd+",");
2475              output.println("otdarray"+cdtemp.getSafeSymbol()+",");
2476              output.println("/* number of fsanalysiswrappers */"+fscounter+",");
2477              output.println("fsanalysiswrapperarray_"+cdtemp.getSafeSymbol()+"};\n");
2478              processedcd.add(cdtemp);
2479          }
2480
2481          //build an array containing every classes for which code has been build
2482          output.println("struct classanalysiswrapper * classanalysiswrapperarray[]={");
2483          for(int i=0;i<state.numClasses();i++) {
2484              ClassDescriptor cn=cdarray[i];
2485              if (i>0)
2486                  output.print(", ");
2487              if (processedcd.contains(cn))
2488                  output.print("&classanalysiswrapper_"+cn.getSafeSymbol());
2489              else
2490                  output.print("NULL");
2491          }
2492          output.println("};");
2493
2494          output.println("#define MAXOTD "+maxotd);
2495          headers.println("#endif");
2496      }
2497
2498     public List<OptionalTaskDescriptor> ordertd(Set<OptionalTaskDescriptor> otdset) {
2499         Relation r=new Relation();
2500         for(Iterator<OptionalTaskDescriptor>otdit=otdset.iterator();otdit.hasNext();) {
2501             OptionalTaskDescriptor otd=otdit.next();
2502             TaskIndex ti=new TaskIndex(otd.td, otd.getIndex());
2503             r.put(ti, otd);
2504         }
2505
2506         LinkedList<OptionalTaskDescriptor> l=new LinkedList<OptionalTaskDescriptor>();
2507         for(Iterator it=r.keySet().iterator();it.hasNext();) {
2508             Set s=r.get(it.next());
2509             for(Iterator it2=s.iterator();it2.hasNext();) {
2510                 OptionalTaskDescriptor otd=(OptionalTaskDescriptor)it2.next();
2511                 l.add(otd);
2512             }
2513         }
2514
2515         return l;
2516     }
2517 }
2518
2519
2520
2521
2522
2523