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.OptionalTaskDescriptor;
  12 import Analysis.TaskStateAnalysis.Predicate;
  13
  14 public class BuildCode {
  15     State state;
  16     Hashtable temptovar;
  17     Hashtable paramstable;
  18     Hashtable tempstable;
  19     Hashtable fieldorder;
  20     Hashtable flagorder;
  21     int tag=0;
  22     String localsprefix="___locals___";
  23     String paramsprefix="___params___";
  24     public static boolean GENERATEPRECISEGC=false;
  25     public static String PREFIX="";
  26     public static String arraytype="ArrayObject";
  27     Virtual virtualcalls;
  28     TypeUtil typeutil;
  29     private int maxtaskparams=0;
  30     private int maxcount=0;
  31     ClassDescriptor[] cdarray;
  32     TypeDescriptor[] arraytable;
  33
  34     public BuildCode(State st, Hashtable temptovar, TypeUtil typeutil) {
  35         state=st;
  36         this.temptovar=temptovar;
  37         paramstable=new Hashtable();
  38         tempstable=new Hashtable();
  39         fieldorder=new Hashtable();
  40         flagorder=new Hashtable();
  41         this.typeutil=typeutil;
  42         virtualcalls=new Virtual(state);
  43     }
  44
  45     /** The buildCode method outputs C code for all the methods.  The Flat
  46      * versions of the methods must already be generated and stored in
  47      * the State object. */
  48
  49     public void buildCode() {
  50         /* Create output streams to write to */
  51         PrintWriter outclassdefs=null;
  52         PrintWriter outstructs=null;
  53         PrintWriter outrepairstructs=null;
  54         PrintWriter outmethodheader=null;
  55         PrintWriter outmethod=null;
  56         PrintWriter outvirtual=null;
  57         PrintWriter outtask=null;
  58         PrintWriter outtaskdefs=null;
  59         PrintWriter outoptionalarrays=null;
  60         PrintWriter optionalheaders=null;
  61
  62         try {
  63             outstructs=new PrintWriter(new FileOutputStream(PREFIX+"structdefs.h"), true);
  64             outmethodheader=new PrintWriter(new FileOutputStream(PREFIX+"methodheaders.h"), true);
  65             outclassdefs=new PrintWriter(new FileOutputStream(PREFIX+"classdefs.h"), true);
  66             outmethod=new PrintWriter(new FileOutputStream(PREFIX+"methods.c"), true);
  67             outvirtual=new PrintWriter(new FileOutputStream(PREFIX+"virtualtable.h"), true);
  68             if (state.TASK) {
  69                 outtask=new PrintWriter(new FileOutputStream(PREFIX+"task.h"), true);
  70                 outtaskdefs=new PrintWriter(new FileOutputStream(PREFIX+"taskdefs.c"), true);
  71                 if (state.OPTIONAL){
  72                     outoptionalarrays=new PrintWriter(new FileOutputStream(PREFIX+"optionalarrays.c"), true);
  73                     optionalheaders=new PrintWriter(new FileOutputStream(PREFIX+"optionalstruct.h"), true);
  74                 }
  75             }
  76             if (state.structfile!=null) {
  77                 outrepairstructs=new PrintWriter(new FileOutputStream(PREFIX+state.structfile+".struct"), true);
  78             }
  79         } catch (Exception e) {
  80             e.printStackTrace();
  81             System.exit(-1);
  82         }
  83
  84         /* Build the virtual dispatch tables */
  85         buildVirtualTables(outvirtual);
  86
  87         /* Output includes */
  88         outmethodheader.println("#ifndef METHODHEADERS_H");
  89         outmethodheader.println("#define METHODHEADERS_H");
  90         outmethodheader.println("#include \"structdefs.h\"");
  91
  92         /* Output Structures */
  93         outputStructs(outstructs);
  94
  95         // Output the C class declarations
  96         // These could mutually reference each other
  97         outputClassDeclarations(outclassdefs);
  98
  99         /* Outputs task structures if this is a task program */
 100         if (state.TASK)
 101             outputTaskTypes(outtask);
 102
 103         // Output function prototypes and structures for parameters
 104         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 105         while(it.hasNext()) {
 106             ClassDescriptor cn=(ClassDescriptor)it.next();
 107             generateCallStructs(cn, outclassdefs, outstructs, outmethodheader);
 108         }
 109         outclassdefs.close();
 110
 111         if (state.TASK) {
 112             /* Map flags to integers */
 113             /* The runtime keeps track of flags using these integers */
 114             it=state.getClassSymbolTable().getDescriptorsIterator();
 115             while(it.hasNext()) {
 116                 ClassDescriptor cn=(ClassDescriptor)it.next();
 117                 mapFlags(cn);
 118             }
 119             /* Generate Tasks */
 120             generateTaskStructs(outstructs, outmethodheader);
 121         }
 122
 123         /* Build the actual methods */
 124         outputMethods(outmethod);
 125
 126         if (state.TASK) {
 127             outputTaskCode(outtaskdefs, outmethod);
 128             outtaskdefs.close();
 129         } else if (state.main!=null) {
 130             /* Generate main method */
 131             outputMainMethod(outmethod);
 132         }
 133         outmethodheader.println("#endif");
 134         outmethodheader.close();
 135         outmethod.close();
 136
 137         if (state.TASK)
 138             outstructs.println("#define MAXTASKPARAMS "+maxtaskparams);
 139         outstructs.println("#endif");
 140         outstructs.close();
 141
 142         /* Generate information for task with optional parameters */
 143         if (state.TASK&&state.OPTIONAL){
 144             generateOptionalArrays(outoptionalarrays, optionalheaders, state.getAnalysisResult(), state.getOptionalTaskDescriptors());
 145             outoptionalarrays.close();
 146         }
 147
 148         /* Output structure definitions for repair tool */
 149         if (state.structfile!=null) {
 150             buildRepairStructs(outrepairstructs);
 151             outrepairstructs.close();
 152         }
 153     }
 154
 155     private void outputMainMethod(PrintWriter outmethod) {
 156         outmethod.println("int main(int argc, const char *argv[]) {");
 157         outmethod.println("  int i;");
 158         if (GENERATEPRECISEGC) {
 159             outmethod.println("  struct ArrayObject * stringarray=allocate_newarray(NULL, STRINGARRAYTYPE, argc-1);");
 160         } else {
 161             outmethod.println("  struct ArrayObject * stringarray=allocate_newarray(STRINGARRAYTYPE, argc-1);");
 162         }
 163         if (state.THREAD) {
 164             outmethod.println("initializethreads();");
 165         }
 166         outmethod.println("  for(i=1;i<argc;i++) {");
 167         outmethod.println("    int length=strlen(argv[i]);");
 168         if (GENERATEPRECISEGC) {
 169             outmethod.println("    struct ___String___ *newstring=NewString(NULL, argv[i], length);");
 170         } else {
 171             outmethod.println("    struct ___String___ *newstring=NewString(argv[i], length);");
 172         }
 173         outmethod.println("    ((void **)(((char *)& stringarray->___length___)+sizeof(int)))[i-1]=newstring;");
 174         outmethod.println("  }");
 175
 176
 177         MethodDescriptor md=typeutil.getMain();
 178         ClassDescriptor cd=typeutil.getMainClass();
 179
 180         outmethod.println("   {");
 181         if (GENERATEPRECISEGC) {
 182             outmethod.print("       struct "+cd.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params __parameterlist__={");
 183             outmethod.println("1, NULL,"+"stringarray};");
 184             outmethod.println("     "+cd.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(& __parameterlist__);");
 185         } else
 186             outmethod.println("     "+cd.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(stringarray);");
 187         outmethod.println("   }");
 188
 189         if (state.THREAD) {
 190             outmethod.println("pthread_mutex_lock(&gclistlock);");
 191             outmethod.println("threadcount--;");
 192             outmethod.println("pthread_cond_signal(&gccond);");
 193             outmethod.println("pthread_mutex_unlock(&gclistlock);");
 194             outmethod.println("pthread_exit(NULL);");
 195         }
 196         outmethod.println("}");
 197     }
 198
 199     private void outputTaskCode(PrintWriter outtaskdefs, PrintWriter outmethod) {
 200         /* Compile task based program */
 201         outtaskdefs.println("#include \"task.h\"");
 202         outtaskdefs.println("#include \"methodheaders.h\"");
 203         Iterator taskit=state.getTaskSymbolTable().getDescriptorsIterator();
 204         while(taskit.hasNext()) {
 205             TaskDescriptor td=(TaskDescriptor)taskit.next();
 206             FlatMethod fm=state.getMethodFlat(td);
 207             generateFlatMethod(fm, outmethod);
 208             generateTaskDescriptor(outtaskdefs, fm, td);
 209         }
 210
 211         //Output task descriptors
 212         taskit=state.getTaskSymbolTable().getDescriptorsIterator();
 213         outtaskdefs.println("struct taskdescriptor * taskarray[]= {");
 214         boolean first=true;
 215         while(taskit.hasNext()) {
 216             TaskDescriptor td=(TaskDescriptor)taskit.next();
 217             if (first)
 218                 first=false;
 219             else
 220                 outtaskdefs.println(",");
 221             outtaskdefs.print("&task_"+td.getSafeSymbol());
 222         }
 223         outtaskdefs.println("};");
 224
 225         outtaskdefs.println("int numtasks="+state.getTaskSymbolTable().getValueSet().size()+";");
 226     }
 227
 228     private void outputMethods(PrintWriter outmethod) {
 229         outmethod.println("#include \"methodheaders.h\"");
 230         outmethod.println("#include \"virtualtable.h\"");
 231         outmethod.println("#include <runtime.h>");
 232         if (state.THREAD)
 233             outmethod.println("#include <thread.h>");
 234         if (state.main!=null) {
 235             outmethod.println("#include <string.h>");
 236         }
 237         if (state.CONSCHECK) {
 238             outmethod.println("#include \"checkers.h\"");
 239         }
 240         //Store the sizes of classes & array elements
 241         generateSizeArray(outmethod);
 242
 243         //Store table of supertypes
 244         generateSuperTypeTable(outmethod);
 245
 246         //Store the layout of classes
 247         generateLayoutStructs(outmethod);
 248
 249         /* Generate code for methods */
 250         Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
 251         while(classit.hasNext()) {
 252             ClassDescriptor cn=(ClassDescriptor)classit.next();
 253             Iterator methodit=cn.getMethods();
 254             while(methodit.hasNext()) {
 255                 /* Classify parameters */
 256                 MethodDescriptor md=(MethodDescriptor)methodit.next();
 257                 FlatMethod fm=state.getMethodFlat(md);
 258                 if (!md.getModifiers().isNative())
 259                     generateFlatMethod(fm,outmethod);
 260             }
 261         }
 262     }
 263
 264     private void outputStructs(PrintWriter outstructs) {
 265         outstructs.println("#ifndef STRUCTDEFS_H");
 266         outstructs.println("#define STRUCTDEFS_H");
 267         outstructs.println("#include \"classdefs.h\"");
 268
 269         /* Output #defines that the runtime uses to determine type
 270          * numbers for various objects it needs */
 271
 272         outstructs.println("#define STRINGARRAYTYPE "+
 273                            (state.getArrayNumber(
 274                                                  (new TypeDescriptor(typeutil.getClass(TypeUtil.StringClass))).makeArray(state))+state.numClasses()));
 275
 276         outstructs.println("#define OBJECTARRAYTYPE "+
 277                            (state.getArrayNumber(
 278                                                  (new TypeDescriptor(typeutil.getClass(TypeUtil.ObjectClass))).makeArray(state))+state.numClasses()));
 279
 280
 281         outstructs.println("#define STRINGTYPE "+typeutil.getClass(TypeUtil.StringClass).getId());
 282         outstructs.println("#define CHARARRAYTYPE "+
 283                            (state.getArrayNumber((new TypeDescriptor(TypeDescriptor.CHAR)).makeArray(state))+state.numClasses()));
 284
 285         outstructs.println("#define BYTEARRAYTYPE "+
 286                            (state.getArrayNumber((new TypeDescriptor(TypeDescriptor.BYTE)).makeArray(state))+state.numClasses()));
 287
 288         outstructs.println("#define BYTEARRAYARRAYTYPE "+
 289                            (state.getArrayNumber((new TypeDescriptor(TypeDescriptor.BYTE)).makeArray(state).makeArray(state))+state.numClasses()));
 290
 291         outstructs.println("#define NUMCLASSES "+state.numClasses());
 292         if (state.TASK) {
 293             outstructs.println("#define STARTUPTYPE "+typeutil.getClass(TypeUtil.StartupClass).getId());
 294             outstructs.println("#define TAGTYPE "+typeutil.getClass(TypeUtil.TagClass).getId());
 295             outstructs.println("#define TAGARRAYTYPE "+
 296                                (state.getArrayNumber(new TypeDescriptor(typeutil.getClass(TypeUtil.TagClass)).makeArray(state))+state.numClasses()));
 297         }
 298     }
 299
 300     private void outputClassDeclarations(PrintWriter outclassdefs) {
 301         if (state.THREAD)
 302             outclassdefs.println("#include <pthread.h>");
 303         outclassdefs.println("struct "+arraytype+";");
 304         /* Start by declaring all structs */
 305         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 306         while(it.hasNext()) {
 307             ClassDescriptor cn=(ClassDescriptor)it.next();
 308             outclassdefs.println("struct "+cn.getSafeSymbol()+";");
 309         }
 310         outclassdefs.println("");
 311         //Print out definition for array type
 312         outclassdefs.println("struct "+arraytype+" {");
 313         outclassdefs.println("  int type;");
 314         if (state.THREAD) {
 315             outclassdefs.println("  pthread_t tid;");
 316             outclassdefs.println("  void * lockentry;");
 317             outclassdefs.println("  int lockcount;");
 318         }
 319         if (state.TASK) {
 320             outclassdefs.println("  int flag;");
 321             outclassdefs.println("  void * flagptr;");
 322             if(state.OPTIONAL) outclassdefs.println("  int failedstatus;");
 323         }
 324         printClassStruct(typeutil.getClass(TypeUtil.ObjectClass), outclassdefs);
 325
 326         outclassdefs.println("  int ___length___;");
 327         outclassdefs.println("};\n");
 328         outclassdefs.println("extern int classsize[];");
 329         outclassdefs.println("extern int hasflags[];");
 330         outclassdefs.println("extern int * pointerarray[];");
 331         outclassdefs.println("extern int supertypes[];");
 332     }
 333
 334     private void outputTaskTypes(PrintWriter outtask) {
 335         //Print out definitions for task types
 336         outtask.println("#ifndef _TASK_H");
 337         outtask.println("#define _TASK_H");
 338         outtask.println("struct parameterdescriptor {");
 339         outtask.println("int type;");
 340         outtask.println("int numberterms;");
 341         outtask.println("int *intarray;");
 342         outtask.println("void * queue;");
 343         outtask.println("int numbertags;");
 344         outtask.println("int *tagarray;");
 345         outtask.println("};");
 346
 347         outtask.println("struct taskdescriptor {");
 348         outtask.println("void * taskptr;");
 349         outtask.println("int numParameters;");
 350         outtask.println("int numTotal;");
 351         outtask.println("struct parameterdescriptor **descriptorarray;");
 352         outtask.println("char * name;");
 353         outtask.println("};");
 354         outtask.println("extern struct taskdescriptor * taskarray[];");
 355         outtask.println("extern numtasks;");
 356         outtask.println("#endif");
 357     }
 358
 359     private void buildRepairStructs(PrintWriter outrepairstructs) {
 360         Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
 361         while(classit.hasNext()) {
 362             ClassDescriptor cn=(ClassDescriptor)classit.next();
 363             outrepairstructs.println("structure "+cn.getSymbol()+" {");
 364             outrepairstructs.println("  int __type__;");
 365             if (state.TASK) {
 366                 outrepairstructs.println("  int __flag__;");
 367                 outrepairstructs.println("  int __flagptr__;");
 368             }
 369             printRepairStruct(cn, outrepairstructs);
 370             outrepairstructs.println("}\n");
 371         }
 372
 373         for(int i=0;i<state.numArrays();i++) {
 374             TypeDescriptor tdarray=arraytable[i];
 375             TypeDescriptor tdelement=tdarray.dereference();
 376             outrepairstructs.println("structure "+arraytype+"_"+state.getArrayNumber(tdarray)+" {");
 377             outrepairstructs.println("  int __type__;");
 378             printRepairStruct(typeutil.getClass(TypeUtil.ObjectClass), outrepairstructs);
 379             outrepairstructs.println("  int length;");
 380             /*
 381               // Need to add support to repair tool for this
 382               if (tdelement.isClass()||tdelement.isArray())
 383                 outrepairstructs.println("  "+tdelement.getRepairSymbol()+" * elem[this.length];");
 384             else
 385                 outrepairstructs.println("  "+tdelement.getRepairSymbol()+" elem[this.length];");
 386             */
 387             outrepairstructs.println("}\n");
 388         }
 389
 390     }
 391
 392     private void printRepairStruct(ClassDescriptor cn, PrintWriter output) {
 393         ClassDescriptor sp=cn.getSuperDesc();
 394         if (sp!=null)
 395             printRepairStruct(sp, output);
 396
 397         Vector fields=(Vector)fieldorder.get(cn);
 398
 399         for(int i=0;i<fields.size();i++) {
 400             FieldDescriptor fd=(FieldDescriptor)fields.get(i);
 401             if (fd.getType().isArray()) {
 402                 output.println("  "+arraytype+"_"+ state.getArrayNumber(fd.getType()) +" * "+fd.getSymbol()+";");
 403             } else if (fd.getType().isClass())
 404                 output.println("  "+fd.getType().getRepairSymbol()+" * "+fd.getSymbol()+";");
 405             else if (fd.getType().isFloat())
 406                 output.println("  int "+fd.getSymbol()+"; /* really float */");
 407             else
 408                 output.println("  "+fd.getType().getRepairSymbol()+" "+fd.getSymbol()+";");
 409         }
 410     }
 411
 412     /** This method outputs TaskDescriptor information */
 413     void generateTaskDescriptor(PrintWriter output, FlatMethod fm, TaskDescriptor task) {
 414         for (int i=0;i<task.numParameters();i++) {
 415             VarDescriptor param_var=task.getParameter(i);
 416             TypeDescriptor param_type=task.getParamType(i);
 417             FlagExpressionNode param_flag=task.getFlag(param_var);
 418             TagExpressionList param_tag=task.getTag(param_var);
 419
 420             int dnfterms;
 421             if (param_flag==null) {
 422                 output.println("int parameterdnf_"+i+"_"+task.getSafeSymbol()+"[]={");
 423                 output.println("0x0, 0x0 };");
 424                 dnfterms=1;
 425             } else {
 426
 427                 DNFFlag dflag=param_flag.getDNF();
 428                 dnfterms=dflag.size();
 429
 430                 Hashtable flags=(Hashtable)flagorder.get(param_type.getClassDesc());
 431                 output.println("int parameterdnf_"+i+"_"+task.getSafeSymbol()+"[]={");
 432                 for(int j=0;j<dflag.size();j++) {
 433                     if (j!=0)
 434                         output.println(",");
 435                     Vector term=dflag.get(j);
 436                     int andmask=0;
 437                     int checkmask=0;
 438                     for(int k=0;k<term.size();k++) {
 439                         DNFFlagAtom dfa=(DNFFlagAtom)term.get(k);
 440                         FlagDescriptor fd=dfa.getFlag();
 441                         boolean negated=dfa.getNegated();
 442                         int flagid=1<<((Integer)flags.get(fd)).intValue();
 443                         andmask|=flagid;
 444                         if (!negated)
 445                             checkmask|=flagid;
 446                     }
 447                     output.print("0x"+Integer.toHexString(andmask)+", 0x"+Integer.toHexString(checkmask));
 448                 }
 449                 output.println("};");
 450             }
 451
 452             output.println("int parametertag_"+i+"_"+task.getSafeSymbol()+"[]={");
 453             //BUG...added next line to fix, test with any task program
 454             if (param_tag!=null)
 455                 for(int j=0;j<param_tag.numTags();j++) {
 456                     if (j!=0)
 457                         output.println(",");
 458                     /* for each tag we need */
 459                     /* which slot it is */
 460                     /* what type it is */
 461                     TagVarDescriptor tvd=(TagVarDescriptor)task.getParameterTable().get(param_tag.getName(j));
 462                     TempDescriptor tmp=param_tag.getTemp(j);
 463                     int slot=fm.getTagInt(tmp);
 464                     output.println(slot+", "+state.getTagId(tvd.getTag()));
 465                 }
 466             output.println("};");
 467
 468             output.println("struct parameterdescriptor parameter_"+i+"_"+task.getSafeSymbol()+"={");
 469             output.println("/* type */"+param_type.getClassDesc().getId()+",");
 470             output.println("/* number of DNF terms */"+dnfterms+",");
 471             output.println("parameterdnf_"+i+"_"+task.getSafeSymbol()+",");
 472             output.println("0,");
 473             //BUG, added next line to fix and else statement...test
 474             //with any task program
 475             if (param_tag!=null)
 476                 output.println("/* number of tags */"+param_tag.numTags()+",");
 477             else
 478                 output.println("/* number of tags */ 0,");
 479             output.println("parametertag_"+i+"_"+task.getSafeSymbol());
 480             output.println("};");
 481         }
 482
 483
 484         output.println("struct parameterdescriptor * parameterdescriptors_"+task.getSafeSymbol()+"[] = {");
 485         for (int i=0;i<task.numParameters();i++) {
 486             if (i!=0)
 487                 output.println(",");
 488             output.print("&parameter_"+i+"_"+task.getSafeSymbol());
 489         }
 490         output.println("};");
 491
 492         output.println("struct taskdescriptor task_"+task.getSafeSymbol()+"={");
 493         output.println("&"+task.getSafeSymbol()+",");
 494         output.println("/* number of parameters */" +task.numParameters() + ",");
 495         int numtotal=task.numParameters()+fm.numTags();
 496         output.println("/* number total parameters */" +numtotal + ",");
 497         output.println("parameterdescriptors_"+task.getSafeSymbol()+",");
 498         output.println("\""+task.getSymbol()+"\"");
 499         output.println("};");
 500     }
 501
 502
 503     /** The buildVirtualTables method outputs the virtual dispatch
 504      * tables for methods. */
 505
 506     private void buildVirtualTables(PrintWriter outvirtual) {
 507         Iterator classit=state.getClassSymbolTable().getDescriptorsIterator();
 508         while(classit.hasNext()) {
 509             ClassDescriptor cd=(ClassDescriptor)classit.next();
 510             if (virtualcalls.getMethodCount(cd)>maxcount)
 511                 maxcount=virtualcalls.getMethodCount(cd);
 512         }
 513         MethodDescriptor[][] virtualtable=new MethodDescriptor[state.numClasses()+state.numArrays()][maxcount];
 514
 515         /* Fill in virtual table */
 516         classit=state.getClassSymbolTable().getDescriptorsIterator();
 517         while(classit.hasNext()) {
 518             ClassDescriptor cd=(ClassDescriptor)classit.next();
 519             fillinRow(cd, virtualtable, cd.getId());
 520         }
 521
 522         ClassDescriptor objectcd=typeutil.getClass(TypeUtil.ObjectClass);
 523         Iterator arrayit=state.getArrayIterator();
 524         while(arrayit.hasNext()) {
 525             TypeDescriptor td=(TypeDescriptor)arrayit.next();
 526             int id=state.getArrayNumber(td);
 527             fillinRow(objectcd, virtualtable, id+state.numClasses());
 528         }
 529
 530         outvirtual.print("void * virtualtable[]={");
 531         boolean needcomma=false;
 532         for(int i=0;i<state.numClasses()+state.numArrays();i++) {
 533             for(int j=0;j<maxcount;j++) {
 534                 if (needcomma)
 535                     outvirtual.print(", ");
 536                 if (virtualtable[i][j]!=null) {
 537                     MethodDescriptor md=virtualtable[i][j];
 538                     outvirtual.print("& "+md.getClassDesc().getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor());
 539                 } else {
 540                     outvirtual.print("0");
 541                 }
 542                 needcomma=true;
 543             }
 544             outvirtual.println("");
 545         }
 546         outvirtual.println("};");
 547         outvirtual.close();
 548     }
 549
 550     private void fillinRow(ClassDescriptor cd, MethodDescriptor[][] virtualtable, int rownum) {
 551         /* Get inherited methods */
 552         if (cd.getSuperDesc()!=null)
 553             fillinRow(cd.getSuperDesc(), virtualtable, rownum);
 554         /* Override them with our methods */
 555         for(Iterator it=cd.getMethods();it.hasNext();) {
 556             MethodDescriptor md=(MethodDescriptor)it.next();
 557             if (md.isStatic()||md.getReturnType()==null)
 558                 continue;
 559             int methodnum=virtualcalls.getMethodNumber(md);
 560             virtualtable[rownum][methodnum]=md;
 561         }
 562     }
 563
 564     /** Generate array that contains the sizes of class objects.  The
 565      * object allocation functions in the runtime use this
 566      * information. */
 567
 568     private void generateSizeArray(PrintWriter outclassdefs) {
 569         outclassdefs.print("int classsize[]={");
 570         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 571         cdarray=new ClassDescriptor[state.numClasses()];
 572         while(it.hasNext()) {
 573             ClassDescriptor cd=(ClassDescriptor)it.next();
 574             cdarray[cd.getId()]=cd;
 575         }
 576         boolean needcomma=false;
 577         for(int i=0;i<state.numClasses();i++) {
 578             if (needcomma)
 579                 outclassdefs.print(", ");
 580             outclassdefs.print("sizeof(struct "+cdarray[i].getSafeSymbol()+")");
 581             needcomma=true;
 582         }
 583
 584         arraytable=new TypeDescriptor[state.numArrays()];
 585
 586         Iterator arrayit=state.getArrayIterator();
 587         while(arrayit.hasNext()) {
 588             TypeDescriptor td=(TypeDescriptor)arrayit.next();
 589             int id=state.getArrayNumber(td);
 590             arraytable[id]=td;
 591         }
 592
 593         for(int i=0;i<state.numArrays();i++) {
 594             if (needcomma)
 595                 outclassdefs.print(", ");
 596             TypeDescriptor tdelement=arraytable[i].dereference();
 597             if (tdelement.isArray()||tdelement.isClass())
 598                 outclassdefs.print("sizeof(void *)");
 599             else
 600                 outclassdefs.print("sizeof("+tdelement.getSafeSymbol()+")");
 601             needcomma=true;
 602         }
 603
 604         outclassdefs.println("};");
 605     }
 606
 607     /** Constructs params and temp objects for each method or task.
 608      * These objects tell the compiler which temps need to be
 609      * allocated.  */
 610
 611     private void generateTempStructs(FlatMethod fm) {
 612         MethodDescriptor md=fm.getMethod();
 613         TaskDescriptor task=fm.getTask();
 614
 615         ParamsObject objectparams=md!=null?new ParamsObject(md,tag++):new ParamsObject(task, tag++);
 616         if (md!=null)
 617             paramstable.put(md, objectparams);
 618         else
 619             paramstable.put(task, objectparams);
 620
 621         for(int i=0;i<fm.numParameters();i++) {
 622             TempDescriptor temp=fm.getParameter(i);
 623             TypeDescriptor type=temp.getType();
 624             if ((type.isPtr()||type.isArray())&&GENERATEPRECISEGC)
 625                 objectparams.addPtr(temp);
 626             else
 627                 objectparams.addPrim(temp);
 628         }
 629
 630         for(int i=0;i<fm.numTags();i++) {
 631             TempDescriptor temp=fm.getTag(i);
 632             if (GENERATEPRECISEGC)
 633                 objectparams.addPtr(temp);
 634             else
 635                 objectparams.addPrim(temp);
 636         }
 637
 638         TempObject objecttemps=md!=null?new TempObject(objectparams,md,tag++):new TempObject(objectparams, task, tag++);
 639         if (md!=null)
 640             tempstable.put(md, objecttemps);
 641         else
 642             tempstable.put(task, objecttemps);
 643
 644         for(Iterator nodeit=fm.getNodeSet().iterator();nodeit.hasNext();) {
 645             FlatNode fn=(FlatNode)nodeit.next();
 646             TempDescriptor[] writes=fn.writesTemps();
 647             for(int i=0;i<writes.length;i++) {
 648                 TempDescriptor temp=writes[i];
 649                 TypeDescriptor type=temp.getType();
 650                 if ((type.isPtr()||type.isArray())&&GENERATEPRECISEGC)
 651                     objecttemps.addPtr(temp);
 652                 else
 653                     objecttemps.addPrim(temp);
 654             }
 655         }
 656     }
 657
 658     /** This method outputs the following information about classes
 659      * and arrays:
 660      * (1) For classes, what are the locations of pointers.
 661      * (2) For arrays, does the array contain pointers or primitives.
 662      * (3) For classes, does the class contain flags.
 663      */
 664
 665     private void generateLayoutStructs(PrintWriter output) {
 666         Iterator it=state.getClassSymbolTable().getDescriptorsIterator();
 667         while(it.hasNext()) {
 668             ClassDescriptor cn=(ClassDescriptor)it.next();
 669             output.println("int "+cn.getSafeSymbol()+"_pointers[]={");
 670             Iterator allit=cn.getFieldTable().getAllDescriptorsIterator();
 671             int count=0;
 672             while(allit.hasNext()) {
 673                 FieldDescriptor fd=(FieldDescriptor)allit.next();
 674                 TypeDescriptor type=fd.getType();
 675                 if (type.isPtr()||type.isArray())
 676                     count++;
 677             }
 678             output.print(count);
 679             allit=cn.getFieldTable().getAllDescriptorsIterator();
 680             while(allit.hasNext()) {
 681                 FieldDescriptor fd=(FieldDescriptor)allit.next();
 682                 TypeDescriptor type=fd.getType();
 683                 if (type.isPtr()||type.isArray()) {
 684                     output.println(",");
 685                     output.print("((int)&(((struct "+cn.getSafeSymbol() +" *)0)->"+fd.getSafeSymbol()+"))");
 686                 }
 687             }
 688             output.println("};");
 689         }
 690         output.println("int * pointerarray[]={");
 691         boolean needcomma=false;
 692         for(int i=0;i<state.numClasses();i++) {
 693             ClassDescriptor cn=cdarray[i];
 694             if (needcomma)
 695                 output.println(",");
 696             needcomma=true;
 697             output.print(cn.getSafeSymbol()+"_pointers");
 698         }
 699
 700         for(int i=0;i<state.numArrays();i++) {
 701             if (needcomma)
 702                 output.println(", ");
 703             TypeDescriptor tdelement=arraytable[i].dereference();
 704             if (tdelement.isArray()||tdelement.isClass())
 705                 output.print("((int *)1)");
 706             else
 707                 output.print("0");
 708             needcomma=true;
 709         }
 710
 711         output.println("};");
 712         needcomma=false;
 713         output.println("int hasflags[]={");
 714         for(int i=0;i<state.numClasses();i++) {
 715             ClassDescriptor cn=cdarray[i];
 716             if (needcomma)
 717                 output.println(", ");
 718             needcomma=true;
 719             if (cn.hasFlags())
 720                 output.print("1");
 721             else
 722                 output.print("0");
 723         }
 724         output.println("};");
 725     }
 726
 727     /** Print out table to give us supertypes */
 728     private void generateSuperTypeTable(PrintWriter output) {
 729         output.println("int supertypes[]={");
 730         boolean needcomma=false;
 731         for(int i=0;i<state.numClasses();i++) {
 732             ClassDescriptor cn=cdarray[i];
 733             if (needcomma)
 734                 output.println(",");
 735             needcomma=true;
 736             if (cn.getSuperDesc()!=null) {
 737                 ClassDescriptor cdsuper=cn.getSuperDesc();
 738                 output.print(cdsuper.getId());
 739             } else
 740                 output.print("-1");
 741         }
 742         output.println("};");
 743     }
 744
 745     /** Force consistent field ordering between inherited classes. */
 746
 747     private void printClassStruct(ClassDescriptor cn, PrintWriter classdefout) {
 748         ClassDescriptor sp=cn.getSuperDesc();
 749         if (sp!=null)
 750             printClassStruct(sp, classdefout);
 751
 752         if (!fieldorder.containsKey(cn)) {
 753             Vector fields=new Vector();
 754             fieldorder.put(cn,fields);
 755             Iterator fieldit=cn.getFields();
 756             while(fieldit.hasNext()) {
 757                 FieldDescriptor fd=(FieldDescriptor)fieldit.next();
 758                 if (sp==null||!sp.getFieldTable().contains(fd.getSymbol()))
 759                     fields.add(fd);
 760             }
 761         }
 762         Vector fields=(Vector)fieldorder.get(cn);
 763
 764         for(int i=0;i<fields.size();i++) {
 765             FieldDescriptor fd=(FieldDescriptor)fields.get(i);
 766             if (fd.getType().isClass()||fd.getType().isArray())
 767                 classdefout.println("  struct "+fd.getType().getSafeSymbol()+" * "+fd.getSafeSymbol()+";");
 768             else
 769                 classdefout.println("  "+fd.getType().getSafeSymbol()+" "+fd.getSafeSymbol()+";");
 770         }
 771     }
 772
 773
 774     /* Map flags to integers consistently between inherited
 775      * classes. */
 776
 777     private void mapFlags(ClassDescriptor cn) {
 778         ClassDescriptor sp=cn.getSuperDesc();
 779         if (sp!=null)
 780             mapFlags(sp);
 781         int max=0;
 782         if (!flagorder.containsKey(cn)) {
 783             Hashtable flags=new Hashtable();
 784             flagorder.put(cn,flags);
 785             if (sp!=null) {
 786                 Hashtable superflags=(Hashtable)flagorder.get(sp);
 787                 Iterator superflagit=superflags.keySet().iterator();
 788                 while(superflagit.hasNext()) {
 789                     FlagDescriptor fd=(FlagDescriptor)superflagit.next();
 790                     Integer number=(Integer)superflags.get(fd);
 791                     flags.put(fd, number);
 792                     if ((number.intValue()+1)>max)
 793                         max=number.intValue()+1;
 794                 }
 795             }
 796
 797             Iterator flagit=cn.getFlags();
 798             while(flagit.hasNext()) {
 799                 FlagDescriptor fd=(FlagDescriptor)flagit.next();
 800                 if (sp==null||!sp.getFlagTable().contains(fd.getSymbol()))
 801                     flags.put(fd, new Integer(max++));
 802             }
 803         }
 804     }
 805
 806
 807     /** This function outputs (1) structures that parameters are
 808      * passed in (when PRECISE GC is enabled) and (2) function
 809      * prototypes for the methods */
 810
 811     private void generateCallStructs(ClassDescriptor cn, PrintWriter classdefout, PrintWriter output, PrintWriter headersout) {
 812         /* Output class structure */
 813         classdefout.println("struct "+cn.getSafeSymbol()+" {");
 814         classdefout.println("  int type;");
 815         if (state.THREAD) {
 816             classdefout.println("  pthread_t tid;");
 817             classdefout.println("  void * lockentry;");
 818             classdefout.println("  int lockcount;");
 819         }
 820
 821         if (state.TASK) {
 822             classdefout.println("  int flag;");
 823             classdefout.println("  void * flagptr;");
 824             if (state.OPTIONAL) classdefout.println("  int failedstatus;");
 825         }
 826         printClassStruct(cn, classdefout);
 827         classdefout.println("};\n");
 828
 829         /* Cycle through methods */
 830         Iterator methodit=cn.getMethods();
 831         while(methodit.hasNext()) {
 832             /* Classify parameters */
 833             MethodDescriptor md=(MethodDescriptor)methodit.next();
 834             FlatMethod fm=state.getMethodFlat(md);
 835             generateTempStructs(fm);
 836
 837             ParamsObject objectparams=(ParamsObject) paramstable.get(md);
 838             TempObject objecttemps=(TempObject) tempstable.get(md);
 839
 840             /* Output parameter structure */
 841             if (GENERATEPRECISEGC) {
 842                 output.println("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params {");
 843                 output.println("  int size;");
 844                 output.println("  void * next;");
 845                 for(int i=0;i<objectparams.numPointers();i++) {
 846                     TempDescriptor temp=objectparams.getPointer(i);
 847                     output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 848                 }
 849                 output.println("};\n");
 850             }
 851
 852             /* Output temp structure */
 853             if (GENERATEPRECISEGC) {
 854                 output.println("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_locals {");
 855                 output.println("  int size;");
 856                 output.println("  void * next;");
 857                 for(int i=0;i<objecttemps.numPointers();i++) {
 858                     TempDescriptor temp=objecttemps.getPointer(i);
 859                     if (temp.getType().isNull())
 860                         output.println("  void * "+temp.getSafeSymbol()+";");
 861                     else
 862                         output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 863                 }
 864                 output.println("};\n");
 865             }
 866
 867             /* Output method declaration */
 868             if (md.getReturnType()!=null) {
 869                 if (md.getReturnType().isClass()||md.getReturnType().isArray())
 870                     headersout.print("struct " + md.getReturnType().getSafeSymbol()+" * ");
 871                 else
 872                     headersout.print(md.getReturnType().getSafeSymbol()+" ");
 873             } else
 874                 //catch the constructor case
 875                 headersout.print("void ");
 876             headersout.print(cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(");
 877
 878             boolean printcomma=false;
 879             if (GENERATEPRECISEGC) {
 880                 headersout.print("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * "+paramsprefix);
 881                 printcomma=true;
 882             }
 883
 884             //output parameter list
 885             for(int i=0;i<objectparams.numPrimitives();i++) {
 886                 TempDescriptor temp=objectparams.getPrimitive(i);
 887                 if (printcomma)
 888                     headersout.print(", ");
 889                 printcomma=true;
 890                 if (temp.getType().isClass()||temp.getType().isArray())
 891                     headersout.print("struct " + temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol());
 892                 else
 893                     headersout.print(temp.getType().getSafeSymbol()+" "+temp.getSafeSymbol());
 894             }
 895             headersout.println(");\n");
 896         }
 897     }
 898
 899
 900     /** This function outputs (1) structures that parameters are
 901      * passed in (when PRECISE GC is enabled) and (2) function
 902      * prototypes for the tasks */
 903
 904     private void generateTaskStructs(PrintWriter output, PrintWriter headersout) {
 905         /* Cycle through tasks */
 906         Iterator taskit=state.getTaskSymbolTable().getDescriptorsIterator();
 907
 908         while(taskit.hasNext()) {
 909             /* Classify parameters */
 910             TaskDescriptor task=(TaskDescriptor)taskit.next();
 911             FlatMethod fm=state.getMethodFlat(task);
 912             generateTempStructs(fm);
 913
 914             ParamsObject objectparams=(ParamsObject) paramstable.get(task);
 915             TempObject objecttemps=(TempObject) tempstable.get(task);
 916
 917             /* Output parameter structure */
 918             if (GENERATEPRECISEGC) {
 919                 output.println("struct "+task.getSafeSymbol()+"_params {");
 920
 921                 output.println("  int size;");
 922                 output.println("  void * next;");
 923                 for(int i=0;i<objectparams.numPointers();i++) {
 924                     TempDescriptor temp=objectparams.getPointer(i);
 925                     output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 926                 }
 927
 928                 output.println("};\n");
 929                 if ((objectparams.numPointers()+fm.numTags())>maxtaskparams) {
 930                     maxtaskparams=objectparams.numPointers()+fm.numTags();
 931                 }
 932             }
 933
 934             /* Output temp structure */
 935             if (GENERATEPRECISEGC) {
 936                 output.println("struct "+task.getSafeSymbol()+"_locals {");
 937                 output.println("  int size;");
 938                 output.println("  void * next;");
 939                 for(int i=0;i<objecttemps.numPointers();i++) {
 940                     TempDescriptor temp=objecttemps.getPointer(i);
 941                     if (temp.getType().isNull())
 942                         output.println("  void * "+temp.getSafeSymbol()+";");
 943                     else if(temp.getType().isTag())
 944                         output.println("  struct "+
 945                                        (new TypeDescriptor(typeutil.getClass(TypeUtil.TagClass))).getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 946                     else
 947                         output.println("  struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+";");
 948                 }
 949                 output.println("};\n");
 950             }
 951
 952             /* Output task declaration */
 953             headersout.print("void " + task.getSafeSymbol()+"(");
 954
 955             boolean printcomma=false;
 956             if (GENERATEPRECISEGC) {
 957                 headersout.print("struct "+task.getSafeSymbol()+"_params * "+paramsprefix);
 958             } else
 959                 headersout.print("void * parameterarray[]");
 960             headersout.println(");\n");
 961         }
 962     }
 963
 964     /** Generate code for FlatMethod fm. */
 965
 966     private void generateFlatMethod(FlatMethod fm, PrintWriter output) {
 967         MethodDescriptor md=fm.getMethod();
 968         TaskDescriptor task=fm.getTask();
 969
 970         ClassDescriptor cn=md!=null?md.getClassDesc():null;
 971
 972         ParamsObject objectparams=(ParamsObject)paramstable.get(md!=null?md:task);
 973
 974         generateHeader(fm, md!=null?md:task,output);
 975
 976         TempObject objecttemp=(TempObject) tempstable.get(md!=null?md:task);
 977
 978         /* Print code */
 979         if (GENERATEPRECISEGC) {
 980             if (md!=null)
 981                 output.print("   struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_locals "+localsprefix+"={");
 982             else
 983                 output.print("   struct "+task.getSafeSymbol()+"_locals "+localsprefix+"={");
 984
 985             output.print(objecttemp.numPointers()+",");
 986             output.print(paramsprefix);
 987             for(int j=0;j<objecttemp.numPointers();j++)
 988                 output.print(", NULL");
 989             output.println("};");
 990         }
 991
 992         for(int i=0;i<objecttemp.numPrimitives();i++) {
 993             TempDescriptor td=objecttemp.getPrimitive(i);
 994             TypeDescriptor type=td.getType();
 995             if (type.isNull())
 996                 output.println("   void * "+td.getSafeSymbol()+";");
 997             else if (type.isClass()||type.isArray())
 998                 output.println("   struct "+type.getSafeSymbol()+" * "+td.getSafeSymbol()+";");
 999             else
1000                 output.println("   "+type.getSafeSymbol()+" "+td.getSafeSymbol()+";");
1001         }
1002
1003         /* Generate labels first */
1004         HashSet tovisit=new HashSet();
1005         HashSet visited=new HashSet();
1006         int labelindex=0;
1007         Hashtable nodetolabel=new Hashtable();
1008         tovisit.add(fm.getNext(0));
1009         FlatNode current_node=null;
1010
1011         //Assign labels 1st
1012         //Node needs a label if it is
1013         while(!tovisit.isEmpty()) {
1014             FlatNode fn=(FlatNode)tovisit.iterator().next();
1015             tovisit.remove(fn);
1016             visited.add(fn);
1017             for(int i=0;i<fn.numNext();i++) {
1018                 FlatNode nn=fn.getNext(i);
1019                 if(i>0) {
1020                     //1) Edge >1 of node
1021                     nodetolabel.put(nn,new Integer(labelindex++));
1022                 }
1023                 if (!visited.contains(nn)&&!tovisit.contains(nn)) {
1024                     tovisit.add(nn);
1025                 } else {
1026                     //2) Join point
1027                     nodetolabel.put(nn,new Integer(labelindex++));
1028                 }
1029             }
1030         }
1031
1032         if (state.THREAD&&GENERATEPRECISEGC) {
1033             output.println("checkcollect(&"+localsprefix+");");
1034         }
1035
1036         //Do the actual code generation
1037         tovisit=new HashSet();
1038         visited=new HashSet();
1039         tovisit.add(fm.getNext(0));
1040         while(current_node!=null||!tovisit.isEmpty()) {
1041             if (current_node==null) {
1042                 current_node=(FlatNode)tovisit.iterator().next();
1043                 tovisit.remove(current_node);
1044             }
1045             visited.add(current_node);
1046             if (nodetolabel.containsKey(current_node))
1047                 output.println("L"+nodetolabel.get(current_node)+":");
1048             if (state.INSTRUCTIONFAILURE) {
1049                 if (state.THREAD) {
1050                     output.println("if ((++instructioncount)>failurecount) {instructioncount=0;injectinstructionfailure();}");
1051                 }
1052                 else
1053                     output.println("if ((--instructioncount)==0) injectinstructionfailure();");
1054             }
1055             if (current_node.numNext()==0) {
1056                 output.print("   ");
1057                 generateFlatNode(fm, current_node, output);
1058                 if (current_node.kind()!=FKind.FlatReturnNode) {
1059                     output.println("   return;");
1060                 }
1061                 current_node=null;
1062             } else if(current_node.numNext()==1) {
1063                 output.print("   ");
1064                 generateFlatNode(fm, current_node, output);
1065                 FlatNode nextnode=current_node.getNext(0);
1066                 if (visited.contains(nextnode)) {
1067                     output.println("goto L"+nodetolabel.get(nextnode)+";");
1068                     current_node=null;
1069                 } else
1070                     current_node=nextnode;
1071             } else if (current_node.numNext()==2) {
1072                 /* Branch */
1073                 output.print("   ");
1074                 generateFlatCondBranch(fm, (FlatCondBranch)current_node, "L"+nodetolabel.get(current_node.getNext(1)), output);
1075                 if (!visited.contains(current_node.getNext(1)))
1076                     tovisit.add(current_node.getNext(1));
1077                 if (visited.contains(current_node.getNext(0))) {
1078                     output.println("goto L"+nodetolabel.get(current_node.getNext(0))+";");
1079                     current_node=null;
1080                 } else
1081                     current_node=current_node.getNext(0);
1082             } else throw new Error();
1083         }
1084
1085
1086         output.println("}\n\n");
1087     }
1088
1089     /** Generate text string that corresponds to the Temp td. */
1090     private String generateTemp(FlatMethod fm, TempDescriptor td) {
1091         MethodDescriptor md=fm.getMethod();
1092         TaskDescriptor task=fm.getTask();
1093         TempObject objecttemps=(TempObject) tempstable.get(md!=null?md:task);
1094
1095         if (objecttemps.isLocalPrim(td)||objecttemps.isParamPrim(td)) {
1096             return td.getSafeSymbol();
1097         }
1098
1099         if (objecttemps.isLocalPtr(td)) {
1100             return localsprefix+"."+td.getSafeSymbol();
1101         }
1102
1103         if (objecttemps.isParamPtr(td)) {
1104             return paramsprefix+"->"+td.getSafeSymbol();
1105         }
1106         throw new Error();
1107     }
1108
1109     private void generateFlatNode(FlatMethod fm, FlatNode fn, PrintWriter output) {
1110         switch(fn.kind()) {
1111         case FKind.FlatAtomicEnterNode:
1112             generateFlatAtomicEnterNode(fm, (FlatAtomicEnterNode) fn, output);
1113             return;
1114         case FKind.FlatAtomicExitNode:
1115             generateFlatAtomicExitNode(fm, (FlatAtomicExitNode) fn, output);
1116             return;
1117         case FKind.FlatTagDeclaration:
1118             generateFlatTagDeclaration(fm, (FlatTagDeclaration) fn,output);
1119             return;
1120         case FKind.FlatCall:
1121             generateFlatCall(fm, (FlatCall) fn,output);
1122             return;
1123         case FKind.FlatFieldNode:
1124             generateFlatFieldNode(fm, (FlatFieldNode) fn,output);
1125             return;
1126         case FKind.FlatElementNode:
1127             generateFlatElementNode(fm, (FlatElementNode) fn,output);
1128             return;
1129         case FKind.FlatSetElementNode:
1130             generateFlatSetElementNode(fm, (FlatSetElementNode) fn,output);
1131             return;
1132         case FKind.FlatSetFieldNode:
1133             generateFlatSetFieldNode(fm, (FlatSetFieldNode) fn,output);
1134             return;
1135         case FKind.FlatNew:
1136             generateFlatNew(fm, (FlatNew) fn,output);
1137             return;
1138         case FKind.FlatOpNode:
1139             generateFlatOpNode(fm, (FlatOpNode) fn,output);
1140             return;
1141         case FKind.FlatCastNode:
1142             generateFlatCastNode(fm, (FlatCastNode) fn,output);
1143             return;
1144         case FKind.FlatLiteralNode:
1145             generateFlatLiteralNode(fm, (FlatLiteralNode) fn,output);
1146             return;
1147         case FKind.FlatReturnNode:
1148             generateFlatReturnNode(fm, (FlatReturnNode) fn,output);
1149             return;
1150         case FKind.FlatNop:
1151             output.println("/* nop */");
1152             return;
1153         case FKind.FlatBackEdge:
1154             if (state.THREAD&&GENERATEPRECISEGC) {
1155                 output.println("checkcollect(&"+localsprefix+");");
1156             } else
1157                 output.println("/* nop */");
1158             return;
1159         case FKind.FlatCheckNode:
1160             generateFlatCheckNode(fm, (FlatCheckNode) fn, output);
1161             return;
1162         case FKind.FlatFlagActionNode:
1163             generateFlatFlagActionNode(fm, (FlatFlagActionNode) fn, output);
1164             return;
1165         }
1166         throw new Error();
1167
1168     }
1169
1170     public void generateFlatAtomicEnterNode(FlatMethod fm,  FlatAtomicEnterNode faen, PrintWriter output) {
1171     }
1172
1173     public void generateFlatAtomicExitNode(FlatMethod fm,  FlatAtomicExitNode faen, PrintWriter output) {
1174     }
1175
1176     private void generateFlatCheckNode(FlatMethod fm,  FlatCheckNode fcn, PrintWriter output) {
1177         if (state.CONSCHECK) {
1178             String specname=fcn.getSpec();
1179             String varname="repairstate___";
1180             output.println("{");
1181             output.println("struct "+specname+"_state * "+varname+"=allocate"+specname+"_state();");
1182
1183             TempDescriptor[] temps=fcn.getTemps();
1184             String[] vars=fcn.getVars();
1185             for(int i=0;i<temps.length;i++) {
1186                 output.println(varname+"->"+vars[i]+"=(int)"+generateTemp(fm, temps[i])+";");
1187             }
1188
1189             output.println("if (doanalysis"+specname+"("+varname+")) {");
1190             output.println("free"+specname+"_state("+varname+");");
1191             output.println("} else {");
1192             output.println("/* Bad invariant */");
1193             output.println("free"+specname+"_state("+varname+");");
1194             output.println("abort_task();");
1195             output.println("}");
1196             output.println("}");
1197         }
1198     }
1199
1200     private void generateFlatCall(FlatMethod fm, FlatCall fc, PrintWriter output) {
1201         MethodDescriptor md=fc.getMethod();
1202         ParamsObject objectparams=(ParamsObject) paramstable.get(md);
1203         ClassDescriptor cn=md.getClassDesc();
1204         output.println("{");
1205         if (GENERATEPRECISEGC) {
1206             output.print("       struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params __parameterlist__={");
1207
1208             output.print(objectparams.numPointers());
1209             //      output.print(objectparams.getUID());
1210             output.print(", & "+localsprefix);
1211             if (fc.getThis()!=null) {
1212                 output.print(", ");
1213                 output.print("(struct "+md.getThis().getType().getSafeSymbol() +" *)"+ generateTemp(fm,fc.getThis()));
1214             }
1215             for(int i=0;i<fc.numArgs();i++) {
1216                 Descriptor var=md.getParameter(i);
1217                 TempDescriptor paramtemp=(TempDescriptor)temptovar.get(var);
1218                 if (objectparams.isParamPtr(paramtemp)) {
1219                     TempDescriptor targ=fc.getArg(i);
1220                     output.print(", ");
1221                     TypeDescriptor td=md.getParamType(i);
1222                     if (td.isTag())
1223                         output.print("(struct "+(new TypeDescriptor(typeutil.getClass(TypeUtil.TagClass))).getSafeSymbol()  +" *)"+generateTemp(fm, targ));
1224                     else
1225                         output.print("(struct "+md.getParamType(i).getSafeSymbol()  +" *)"+generateTemp(fm, targ));
1226                 }
1227             }
1228             output.println("};");
1229         }
1230         output.print("       ");
1231
1232
1233         if (fc.getReturnTemp()!=null)
1234             output.print(generateTemp(fm,fc.getReturnTemp())+"=");
1235
1236         /* Do we need to do virtual dispatch? */
1237         if (md.isStatic()||md.getReturnType()==null||singleCall(fc.getThis().getType().getClassDesc(),md)) {
1238             output.print(cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor());
1239         } else {
1240
1241             output.print("((");
1242             if (md.getReturnType().isClass()||md.getReturnType().isArray())
1243                 output.print("struct " + md.getReturnType().getSafeSymbol()+" * ");
1244             else
1245                 output.print(md.getReturnType().getSafeSymbol()+" ");
1246             output.print("(*)(");
1247
1248             boolean printcomma=false;
1249             if (GENERATEPRECISEGC) {
1250                 output.print("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * ");
1251                 printcomma=true;
1252             }
1253
1254
1255             for(int i=0;i<objectparams.numPrimitives();i++) {
1256                 TempDescriptor temp=objectparams.getPrimitive(i);
1257                 if (printcomma)
1258                     output.print(", ");
1259                 printcomma=true;
1260                 if (temp.getType().isClass()||temp.getType().isArray())
1261                     output.print("struct " + temp.getType().getSafeSymbol()+" * ");
1262                 else
1263                     output.print(temp.getType().getSafeSymbol());
1264             }
1265
1266             output.print("))virtualtable["+generateTemp(fm,fc.getThis())+"->type*"+maxcount+"+"+virtualcalls.getMethodNumber(md)+"])");
1267         }
1268
1269         output.print("(");
1270         boolean needcomma=false;
1271         if (GENERATEPRECISEGC) {
1272             output.print("&__parameterlist__");
1273             needcomma=true;
1274         } else {
1275             if (fc.getThis()!=null) {
1276                 TypeDescriptor ptd=md.getThis().getType();
1277                 if (ptd.isClass()&&!ptd.isArray())
1278                     output.print("(struct "+ptd.getSafeSymbol()+" *) ");
1279                 output.print(generateTemp(fm,fc.getThis()));
1280                 needcomma=true;
1281             }
1282         }
1283         for(int i=0;i<fc.numArgs();i++) {
1284             Descriptor var=md.getParameter(i);
1285             TempDescriptor paramtemp=(TempDescriptor)temptovar.get(var);
1286             if (objectparams.isParamPrim(paramtemp)) {
1287                 TempDescriptor targ=fc.getArg(i);
1288                 if (needcomma)
1289                     output.print(", ");
1290
1291                 TypeDescriptor ptd=md.getParamType(i);
1292                 if (ptd.isClass()&&!ptd.isArray())
1293                     output.print("(struct "+ptd.getSafeSymbol()+" *) ");
1294                 output.print(generateTemp(fm, targ));
1295                 needcomma=true;
1296             }
1297         }
1298         output.println(");");
1299         output.println("   }");
1300     }
1301
1302     private boolean singleCall(ClassDescriptor thiscd, MethodDescriptor md) {
1303         Set subclasses=typeutil.getSubClasses(thiscd);
1304         if (subclasses==null)
1305             return true;
1306         for(Iterator classit=subclasses.iterator();classit.hasNext();) {
1307             ClassDescriptor cd=(ClassDescriptor)classit.next();
1308             Set possiblematches=cd.getMethodTable().getSet(md.getSymbol());
1309             for(Iterator matchit=possiblematches.iterator();matchit.hasNext();) {
1310                 MethodDescriptor matchmd=(MethodDescriptor)matchit.next();
1311                 if (md.matches(matchmd))
1312                     return false;
1313             }
1314         }
1315         return true;
1316     }
1317
1318     private void generateFlatFieldNode(FlatMethod fm, FlatFieldNode ffn, PrintWriter output) {
1319         output.println(generateTemp(fm, ffn.getDst())+"="+ generateTemp(fm,ffn.getSrc())+"->"+ ffn.getField().getSafeSymbol()+";");
1320     }
1321
1322     private void generateFlatSetFieldNode(FlatMethod fm, FlatSetFieldNode fsfn, PrintWriter output) {
1323         if (fsfn.getField().getSymbol().equals("length")&&fsfn.getDst().getType().isArray())
1324             throw new Error("Can't set array length");
1325         output.println(generateTemp(fm, fsfn.getDst())+"->"+ fsfn.getField().getSafeSymbol()+"="+ generateTemp(fm,fsfn.getSrc())+";");
1326     }
1327
1328     private void generateFlatElementNode(FlatMethod fm, FlatElementNode fen, PrintWriter output) {
1329         TypeDescriptor elementtype=fen.getSrc().getType().dereference();
1330         String type="";
1331
1332         if (elementtype.isArray()||elementtype.isClass())
1333             type="void *";
1334         else
1335             type=elementtype.getSafeSymbol()+" ";
1336
1337         if (fen.needsBoundsCheck()) {
1338             output.println("if ("+generateTemp(fm, fen.getIndex())+"< 0 || "+generateTemp(fm, fen.getIndex())+" >= "+generateTemp(fm,fen.getSrc()) + "->___length___)");
1339             output.println("failedboundschk();");
1340         }
1341
1342         output.println(generateTemp(fm, fen.getDst())+"=(("+ type+"*)(((char *) &("+ generateTemp(fm,fen.getSrc())+"->___length___))+sizeof(int)))["+generateTemp(fm, fen.getIndex())+"];");
1343     }
1344
1345     private void generateFlatSetElementNode(FlatMethod fm, FlatSetElementNode fsen, PrintWriter output) {
1346         //TODO: need dynamic check to make sure this assignment is actually legal
1347         //Because Object[] could actually be something more specific...ie. Integer[]
1348
1349         TypeDescriptor elementtype=fsen.getDst().getType().dereference();
1350         String type="";
1351
1352         if (elementtype.isArray()||elementtype.isClass())
1353             type="void *";
1354         else
1355             type=elementtype.getSafeSymbol()+" ";
1356
1357         if (fsen.needsBoundsCheck()) {
1358             output.println("if ("+generateTemp(fm, fsen.getIndex())+"< 0 || "+generateTemp(fm, fsen.getIndex())+" >= "+generateTemp(fm,fsen.getDst()) + "->___length___)");
1359             output.println("failedboundschk();");
1360         }
1361
1362         output.println("(("+type +"*)(((char *) &("+ generateTemp(fm,fsen.getDst())+"->___length___))+sizeof(int)))["+generateTemp(fm, fsen.getIndex())+"]="+generateTemp(fm,fsen.getSrc())+";");
1363     }
1364
1365     private void generateFlatNew(FlatMethod fm, FlatNew fn, PrintWriter output) {
1366         if (fn.getType().isArray()) {
1367             int arrayid=state.getArrayNumber(fn.getType())+state.numClasses();
1368             if (GENERATEPRECISEGC) {
1369                 output.println(generateTemp(fm,fn.getDst())+"=allocate_newarray(&"+localsprefix+", "+arrayid+", "+generateTemp(fm, fn.getSize())+");");
1370             } else {
1371                 output.println(generateTemp(fm,fn.getDst())+"=allocate_newarray("+arrayid+", "+generateTemp(fm, fn.getSize())+");");
1372             }
1373         } else {
1374             if (GENERATEPRECISEGC) {
1375                 output.println(generateTemp(fm,fn.getDst())+"=allocate_new(&"+localsprefix+", "+fn.getType().getClassDesc().getId()+");");
1376             } else {
1377                 output.println(generateTemp(fm,fn.getDst())+"=allocate_new("+fn.getType().getClassDesc().getId()+");");
1378             }
1379         }
1380     }
1381
1382
1383     private void generateFlatTagDeclaration(FlatMethod fm, FlatTagDeclaration fn, PrintWriter output) {
1384         if (GENERATEPRECISEGC) {
1385             output.println(generateTemp(fm,fn.getDst())+"=allocate_tag(&"+localsprefix+", "+state.getTagId(fn.getType())+");");
1386         } else {
1387             output.println(generateTemp(fm,fn.getDst())+"=allocate_tag("+state.getTagId(fn.getType())+");");
1388         }
1389     }
1390
1391     private void generateFlatOpNode(FlatMethod fm, FlatOpNode fon, PrintWriter output) {
1392
1393         if (fon.getRight()!=null)
1394             output.println(generateTemp(fm, fon.getDest())+" = "+generateTemp(fm, fon.getLeft())+fon.getOp().toString()+generateTemp(fm,fon.getRight())+";");
1395         else if (fon.getOp().getOp()==Operation.ASSIGN)
1396             output.println(generateTemp(fm, fon.getDest())+" = "+generateTemp(fm, fon.getLeft())+";");
1397         else if (fon.getOp().getOp()==Operation.UNARYPLUS)
1398             output.println(generateTemp(fm, fon.getDest())+" = "+generateTemp(fm, fon.getLeft())+";");
1399         else if (fon.getOp().getOp()==Operation.UNARYMINUS)
1400             output.println(generateTemp(fm, fon.getDest())+" = -"+generateTemp(fm, fon.getLeft())+";");
1401         else if (fon.getOp().getOp()==Operation.LOGIC_NOT)
1402             output.println(generateTemp(fm, fon.getDest())+" = !"+generateTemp(fm, fon.getLeft())+";");
1403         else
1404             output.println(generateTemp(fm, fon.getDest())+fon.getOp().toString()+generateTemp(fm, fon.getLeft())+";");
1405     }
1406
1407     private void generateFlatCastNode(FlatMethod fm, FlatCastNode fcn, PrintWriter output) {
1408         /* TODO: Do type check here */
1409         if (fcn.getType().isArray()) {
1410             throw new Error();
1411         } else if (fcn.getType().isClass())
1412             output.println(generateTemp(fm,fcn.getDst())+"=(struct "+fcn.getType().getSafeSymbol()+" *)"+generateTemp(fm,fcn.getSrc())+";");
1413         else
1414             output.println(generateTemp(fm,fcn.getDst())+"=("+fcn.getType().getSafeSymbol()+")"+generateTemp(fm,fcn.getSrc())+";");
1415     }
1416
1417     private void generateFlatLiteralNode(FlatMethod fm, FlatLiteralNode fln, PrintWriter output) {
1418         if (fln.getValue()==null)
1419             output.println(generateTemp(fm, fln.getDst())+"=0;");
1420         else if (fln.getType().getSymbol().equals(TypeUtil.StringClass)) {
1421             if (GENERATEPRECISEGC) {
1422                 output.println(generateTemp(fm, fln.getDst())+"=NewString(&"+localsprefix+", \""+FlatLiteralNode.escapeString((String)fln.getValue())+"\","+((String)fln.getValue()).length()+");");
1423             } else {
1424                 output.println(generateTemp(fm, fln.getDst())+"=NewString(\""+FlatLiteralNode.escapeString((String)fln.getValue())+"\","+((String)fln.getValue()).length()+");");
1425             }
1426         } else if (fln.getType().isBoolean()) {
1427             if (((Boolean)fln.getValue()).booleanValue())
1428                 output.println(generateTemp(fm, fln.getDst())+"=1;");
1429             else
1430                 output.println(generateTemp(fm, fln.getDst())+"=0;");
1431         } else if (fln.getType().isChar()) {
1432             String st=FlatLiteralNode.escapeString(fln.getValue().toString());
1433             output.println(generateTemp(fm, fln.getDst())+"='"+st+"';");
1434         } else
1435             output.println(generateTemp(fm, fln.getDst())+"="+fln.getValue()+";");
1436     }
1437
1438     private void generateFlatReturnNode(FlatMethod fm, FlatReturnNode frn, PrintWriter output) {
1439         if (frn.getReturnTemp()!=null)
1440             output.println("return "+generateTemp(fm, frn.getReturnTemp())+";");
1441         else
1442             output.println("return;");
1443     }
1444
1445     private void generateFlatCondBranch(FlatMethod fm, FlatCondBranch fcb, String label, PrintWriter output) {
1446         output.println("if (!"+generateTemp(fm, fcb.getTest())+") goto "+label+";");
1447     }
1448
1449     /** This method generates header information for the method or
1450      * task referenced by the Descriptor des. */
1451
1452     private void generateHeader(FlatMethod fm, Descriptor des, PrintWriter output) {
1453         /* Print header */
1454         ParamsObject objectparams=(ParamsObject)paramstable.get(des);
1455         MethodDescriptor md=null;
1456         TaskDescriptor task=null;
1457         if (des instanceof MethodDescriptor)
1458             md=(MethodDescriptor) des;
1459         else
1460             task=(TaskDescriptor) des;
1461
1462         ClassDescriptor cn=md!=null?md.getClassDesc():null;
1463
1464         if (md!=null&&md.getReturnType()!=null) {
1465             if (md.getReturnType().isClass()||md.getReturnType().isArray())
1466                 output.print("struct " + md.getReturnType().getSafeSymbol()+" * ");
1467             else
1468                 output.print(md.getReturnType().getSafeSymbol()+" ");
1469         } else
1470             //catch the constructor case
1471             output.print("void ");
1472         if (md!=null)
1473             output.print(cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"(");
1474         else
1475             output.print(task.getSafeSymbol()+"(");
1476
1477         boolean printcomma=false;
1478         if (GENERATEPRECISEGC) {
1479             if (md!=null)
1480                 output.print("struct "+cn.getSafeSymbol()+md.getSafeSymbol()+"_"+md.getSafeMethodDescriptor()+"_params * "+paramsprefix);
1481             else
1482                 output.print("struct "+task.getSafeSymbol()+"_params * "+paramsprefix);
1483             printcomma=true;
1484         }
1485
1486         if (md!=null) {
1487             /* Method */
1488             for(int i=0;i<objectparams.numPrimitives();i++) {
1489                 TempDescriptor temp=objectparams.getPrimitive(i);
1490                 if (printcomma)
1491                     output.print(", ");
1492                 printcomma=true;
1493                 if (temp.getType().isClass()||temp.getType().isArray())
1494                     output.print("struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol());
1495                 else
1496                     output.print(temp.getType().getSafeSymbol()+" "+temp.getSafeSymbol());
1497             }
1498             output.println(") {");
1499         } else if (!GENERATEPRECISEGC) {
1500             /* Imprecise Task */
1501             output.println("void * parameterarray[]) {");
1502             /* Unpack variables */
1503             for(int i=0;i<objectparams.numPrimitives();i++) {
1504                 TempDescriptor temp=objectparams.getPrimitive(i);
1505                 output.println("struct "+temp.getType().getSafeSymbol()+" * "+temp.getSafeSymbol()+"=parameterarray["+i+"];");
1506             }
1507             for(int i=0;i<fm.numTags();i++) {
1508                 TempDescriptor temp=fm.getTag(i);
1509                 int offset=i+objectparams.numPrimitives();
1510                 output.println("struct ___TagDescriptor___ * "+temp.getSafeSymbol()+"=parameterarray["+offset+"];");
1511             }
1512
1513             if ((objectparams.numPrimitives()+fm.numTags())>maxtaskparams)
1514                 maxtaskparams=objectparams.numPrimitives()+fm.numTags();
1515         } else output.println(") {");
1516     }
1517
1518     public void generateFlatFlagActionNode(FlatMethod fm, FlatFlagActionNode ffan, PrintWriter output) {
1519         output.println("/* FlatFlagActionNode */");
1520
1521
1522         /* Process tag changes */
1523         Relation tagsettable=new Relation();
1524         Relation tagcleartable=new Relation();
1525
1526         Iterator tagsit=ffan.getTempTagPairs();
1527         while (tagsit.hasNext()) {
1528             TempTagPair ttp=(TempTagPair) tagsit.next();
1529             TempDescriptor objtmp=ttp.getTemp();
1530             TagDescriptor tag=ttp.getTag();
1531             TempDescriptor tagtmp=ttp.getTagTemp();
1532             boolean tagstatus=ffan.getTagChange(ttp);
1533             if (tagstatus) {
1534                 tagsettable.put(objtmp, tagtmp);
1535             } else {
1536                 tagcleartable.put(objtmp, tagtmp);
1537             }
1538         }
1539
1540
1541         Hashtable flagandtable=new Hashtable();
1542         Hashtable flagortable=new Hashtable();
1543
1544         /* Process flag changes */
1545         Iterator flagsit=ffan.getTempFlagPairs();
1546         while(flagsit.hasNext()) {
1547             TempFlagPair tfp=(TempFlagPair)flagsit.next();
1548             TempDescriptor temp=tfp.getTemp();
1549             Hashtable flagtable=(Hashtable)flagorder.get(temp.getType().getClassDesc());
1550             FlagDescriptor flag=tfp.getFlag();
1551             if (flag==null) {
1552                 //Newly allocate objects that don't set any flags case
1553                 if (flagortable.containsKey(temp)) {
1554                     throw new Error();
1555                 }
1556                 int mask=0;
1557                 flagortable.put(temp,new Integer(mask));
1558             } else {
1559                 int flagid=1<<((Integer)flagtable.get(flag)).intValue();
1560                 boolean flagstatus=ffan.getFlagChange(tfp);
1561                 if (flagstatus) {
1562                     int mask=0;
1563                     if (flagortable.containsKey(temp)) {
1564                         mask=((Integer)flagortable.get(temp)).intValue();
1565                     }
1566                     mask|=flagid;
1567                     flagortable.put(temp,new Integer(mask));
1568                 } else {
1569                     int mask=0xFFFFFFFF;
1570                     if (flagandtable.containsKey(temp)) {
1571                         mask=((Integer)flagandtable.get(temp)).intValue();
1572                     }
1573                     mask&=(0xFFFFFFFF^flagid);
1574                     flagandtable.put(temp,new Integer(mask));
1575                 }
1576             }
1577         }
1578
1579
1580         HashSet flagtagset=new HashSet();
1581         flagtagset.addAll(flagortable.keySet());
1582         flagtagset.addAll(flagandtable.keySet());
1583         flagtagset.addAll(tagsettable.keySet());
1584         flagtagset.addAll(tagcleartable.keySet());
1585
1586         Iterator ftit=flagtagset.iterator();
1587         while(ftit.hasNext()) {
1588             TempDescriptor temp=(TempDescriptor)ftit.next();
1589
1590
1591             Set tagtmps=tagcleartable.get(temp);
1592             if (tagtmps!=null) {
1593                 Iterator tagit=tagtmps.iterator();
1594                 while(tagit.hasNext()) {
1595                     TempDescriptor tagtmp=(TempDescriptor)tagit.next();
1596                     if (GENERATEPRECISEGC)
1597                         output.println("tagclear(&"+localsprefix+", (struct ___Object___ *)"+generateTemp(fm, temp)+", "+generateTemp(fm,tagtmp)+");");
1598                     else
1599                         output.println("tagclear((struct ___Object___ *)"+generateTemp(fm, temp)+", "+generateTemp(fm,tagtmp)+");");
1600                 }
1601             }
1602
1603             tagtmps=tagsettable.get(temp);
1604             if (tagtmps!=null) {
1605                 Iterator tagit=tagtmps.iterator();
1606                 while(tagit.hasNext()) {
1607                     TempDescriptor tagtmp=(TempDescriptor)tagit.next();
1608                     if (GENERATEPRECISEGC)
1609                         output.println("tagset(&"+localsprefix+", (struct ___Object___ *)"+generateTemp(fm, temp)+", "+generateTemp(fm,tagtmp)+");");
1610                     else
1611                         output.println("tagset((struct ___Object___ *)"+generateTemp(fm, temp)+", "+generateTemp(fm,tagtmp)+");");
1612                 }
1613             }
1614
1615             int ormask=0;
1616             int andmask=0xFFFFFFF;
1617
1618             if (flagortable.containsKey(temp))
1619                 ormask=((Integer)flagortable.get(temp)).intValue();
1620             if (flagandtable.containsKey(temp))
1621                 andmask=((Integer)flagandtable.get(temp)).intValue();
1622             if (ffan.getTaskType()==FlatFlagActionNode.NEWOBJECT) {
1623                 output.println("flagorandinit("+generateTemp(fm, temp)+", 0x"+Integer.toHexString(ormask)+", 0x"+Integer.toHexString(andmask)+");");
1624             } else {
1625                 output.println("flagorand("+generateTemp(fm, temp)+", 0x"+Integer.toHexString(ormask)+", 0x"+Integer.toHexString(andmask)+");");
1626             }
1627         }
1628     }
1629
1630      void generateOptionalArrays(PrintWriter output, PrintWriter headers, Hashtable<ClassDescriptor, Hashtable<FlagState, HashSet>> safeexecution, Hashtable optionaltaskdescriptors) {
1631
1632          //GENERATE HEADERS
1633          headers.println("#include \"task.h\"\n\n");
1634
1635
1636
1637          //STRUCT PREDICATEMEMBER
1638          headers.println("struct predicatemember{");
1639          headers.println("int type;");
1640          headers.println("int numdnfterms;");
1641          headers.println("int * flags;");
1642          headers.println("int numtags;");
1643          headers.println("int * tags;\n};\n\n");
1644
1645          //STRUCT EXITFLAGSTATE
1646          headers.println("struct exitflagstate{");
1647          headers.println("int numflags;");
1648          headers.println("int * flags;");
1649          /*
1650            headers.println("int numtags;");
1651            headers.println("int * tags;");
1652          */
1653          headers.println("\n};\n\n");
1654
1655          //STRUCT EXITSTATES
1656          headers.println("struct exitstates{");
1657          headers.println("int numexitflagstates;");
1658          headers.println("struct exitflagstate * exitflagstatearray;\n};\n\n");
1659
1660          //STRUCT OPTIONALTASKDESCRIPTOR
1661          headers.println("struct optionaltaskdescriptor{");
1662          headers.println("struct taskdescriptor * task;");
1663          headers.println("int numpredicatemembers;");
1664          headers.println("struct predicatemember * predicatememberarray;");
1665          headers.println("int numexitstates;");
1666          headers.println("struct existates * exitstatesarray;\n};\n\n");
1667
1668          //STRUCT FSANALYSISWRAPPER
1669          headers.println("struct fsanalysiswrapper{");
1670          headers.println("int numflags;");
1671          headers.println("int * flags;");
1672          headers.println("int numtags;");
1673          headers.println("int * tags;");
1674          headers.println("int numoptionaltaskdescriptors;");
1675          headers.println("struct optionaltaskdescriptor * optionaltaskdescriptorarray;\n};\n\n");
1676
1677          //STRUCT CLASSANALYSISWRAPPER
1678          headers.println("struct classanalyiswrapper{");
1679          headers.println("int type;");
1680          headers.println("int numfsanalysiswrappers;");
1681          headers.println("struct fsanalysiswrapper * fsanalysiswrapperarray;\n};\n\n");
1682
1683          Iterator taskit=state.getTaskSymbolTable().getDescriptorsIterator();
1684          while(taskit.hasNext()) {
1685              TaskDescriptor td=(TaskDescriptor)taskit.next();
1686              headers.println("extern struct taskdescriptor task_"+td.getSafeSymbol()+";");
1687          }
1688
1689
1690
1691          //GENERATE STRUCTS
1692          output.println("#include \"optionalstruct.h\"\n\n");
1693          HashSet processedcd = new HashSet();
1694
1695
1696          Enumeration e = safeexecution.keys();
1697          while (e.hasMoreElements()) {
1698
1699              //get the class
1700              ClassDescriptor cdtemp=(ClassDescriptor)e.nextElement();
1701              Hashtable flaginfo=(Hashtable)flagorder.get(cdtemp);//will be used several times
1702
1703              //Generate the struct of optionals
1704              if((Hashtable)optionaltaskdescriptors.get(cdtemp)==null) System.out.println("Was in cd :"+cdtemp.getSymbol());
1705              Collection c_otd = ((Hashtable)optionaltaskdescriptors.get(cdtemp)).values();
1706              if( !c_otd.isEmpty() ){
1707                  for(Iterator otd_it = c_otd.iterator(); otd_it.hasNext();){
1708                      OptionalTaskDescriptor otd = (OptionalTaskDescriptor)otd_it.next();
1709
1710                      //generate the int arrays for the predicate
1711                      Predicate predicate = otd.predicate;
1712                      int predicateindex = 0;
1713                      //iterate through the classes concerned by the predicate
1714                      Collection c_vard = predicate.vardescriptors.values();
1715                      for(Iterator vard_it = c_vard.iterator(); vard_it.hasNext();){
1716                          VarDescriptor vard = (VarDescriptor)vard_it.next();
1717                          TypeDescriptor typed = vard.getType();
1718
1719                          //generate for flags
1720                          HashSet fen_hashset = predicate.flags.get(vard.getSymbol());
1721                          output.println("int predicateflags_"+predicateindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"[]={");
1722                          int numberterms=0;
1723                          if (fen_hashset!=null){
1724                              for (Iterator fen_it = fen_hashset.iterator(); fen_it.hasNext();){
1725                                  FlagExpressionNode fen = (FlagExpressionNode)fen_it.next();
1726                                  if (fen==null) {
1727                                      //output.println("0x0, 0x0 };");
1728                                      //numberterms+=1;
1729                                  }
1730                                  else {
1731
1732                                      DNFFlag dflag=fen.getDNF();
1733                                      numberterms+=dflag.size();
1734
1735                                      Hashtable flags=(Hashtable)flagorder.get(typed.getClassDesc());
1736
1737                                      for(int j=0;j<dflag.size();j++) {
1738                                          if (j!=0)
1739                                              output.println(",");
1740                                          Vector term=dflag.get(j);
1741                                          int andmask=0;
1742                                          int checkmask=0;
1743                                          for(int k=0;k<term.size();k++) {
1744                                              DNFFlagAtom dfa=(DNFFlagAtom)term.get(k);
1745                                              FlagDescriptor fd=dfa.getFlag();
1746                                              boolean negated=dfa.getNegated();
1747                                              int flagid=1<<((Integer)flags.get(fd)).intValue();
1748                                              andmask|=flagid;
1749                                              if (!negated)
1750                                                  checkmask|=flagid;
1751                                          }
1752                                          output.print("/*andmask*/0x"+Integer.toHexString(andmask)+", /*checkmask*/0x"+Integer.toHexString(checkmask));
1753                                      }
1754                                  }
1755                              }
1756                          }
1757                          output.println("};\n");
1758
1759                          //generate for tags
1760                          TagExpressionList tagel = predicate.tags.get(vard.getSymbol());
1761                          output.println("int predicatetags_"+predicateindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"[]={");
1762                          //BUG...added next line to fix, test with any task program
1763                          int numtags = 0;
1764                          if (tagel!=null){
1765                              for(int j=0;j<tagel.numTags();j++) {
1766                                  if (j!=0)
1767                                      output.println(",");
1768                                  /* for each tag we need */
1769                                  /* which slot it is */
1770                                  /* what type it is */
1771                                  //TagVarDescriptor tvd=(TagVarDescriptor)task.getParameterTable().get(tagel.getName(j));
1772                                  TempDescriptor tmp=tagel.getTemp(j);
1773                                  //got rid of slot
1774                                  output.println("/*tagid*/"+state.getTagId(tmp.getTag()));
1775                              }
1776                              numtags = tagel.numTags();
1777                          }
1778                          output.println("};");
1779
1780                          //store the result into a predicatemember struct
1781                          output.println("struct predicatemember predicatemember_"+predicateindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"={");
1782                          output.println("/*type*/"+typed.getClassDesc().getId()+",");
1783                          output.println("/* number of dnf terms */"+numberterms+",");
1784                          output.println("predicateflags_"+predicateindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+",");
1785                          output.println("/* number of tag */"+numtags+",");
1786                          output.println("predicatetags_"+predicateindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+",");
1787                          output.println("};\n");
1788                          predicateindex++;
1789                      }
1790
1791
1792                      //generate an array that stores the entire predicate
1793                      output.println("struct predicatemember * predicatememberarray_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"[]={");
1794                      for( int j = 0; j<predicateindex; j++){
1795                          if( j != predicateindex-1)output.println("&predicatemember_"+j+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+",");
1796                          else output.println("&predicatemember_"+j+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"};\n");
1797                      }
1798
1799                      //generate the struct for possible exitfses
1800                      HashSet<HashSet> exitfses = otd.exitfses;
1801                      int exitindex = 0;
1802                      int nbexit = exitfses.size();
1803                      int fsnumber;
1804
1805                      //iterate through possible exits
1806                      for(Iterator exitfseshash = exitfses.iterator(); exitfseshash.hasNext();){
1807                          HashSet temp_hashset = (HashSet)exitfseshash.next();
1808                          fsnumber = 0 ;
1809
1810                          //iterate through possible FSes corresponding to the exit
1811                          for(Iterator exfses = temp_hashset.iterator(); exfses.hasNext();){
1812                             FlagState fs = (FlagState)exfses.next();
1813                             fsnumber++;
1814                             output.println("int flags"+fsnumber+"_EXIT"+exitindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"[]={");
1815                             int counterflag = 0;
1816                             for(Iterator flags = fs.getFlags(); flags.hasNext();){
1817                                 FlagDescriptor flagd = (FlagDescriptor)flags.next();
1818                                 int flagid=1<<((Integer)flaginfo.get(flagd)).intValue();
1819                                 if( flags.hasNext() ) output.print("0x"+Integer.toHexString(flagid)+" /*"+Integer.toBinaryString(flagid)+"*/,");
1820                                 else  output.print("0x"+Integer.toHexString(flagid)+" /*"+Integer.toBinaryString(flagid)+"*/");
1821                                 counterflag++;
1822                             }
1823                             output.println("};\n");
1824                             //do the same for tags;
1825                             //maybe not needed because no tag changes tolerated.
1826
1827                             //store the information into a struct
1828                             output.println("struct exitflagstate exitflagstate"+fsnumber+"_EXIT"+exitindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"={");
1829                             output.println("/*number of flags*/"+counterflag+",");
1830                             output.println("flags"+fsnumber+"_EXIT"+exitindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol());
1831                             output.println("};\n");
1832                          }
1833
1834                          //store fses corresponding to this exit into an array
1835                          output.println("struct exitflagstate * exitflagstatearray"+"_EXIT"+exitindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+" [] = {");
1836                          for( int j = 0; j<fsnumber; j++){
1837                              if( j != fsnumber-1)output.println("&exitflagstate"+(j+1)+"_EXIT"+exitindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"'");
1838                              else output.println("&exitflagstate"+(j+1)+"_EXIT"+exitindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"};\n");
1839                          }
1840
1841                          //store that information in a struct
1842                          output.println("struct exitstates exitstates"+exitindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"={");
1843                          output.println("/*number of exitflagstate*/"+fsnumber+",");
1844                          output.println("exitflagstatearray"+"_EXIT"+exitindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol());
1845                          output.println("};\n");
1846
1847                          exitindex++;
1848                      }
1849
1850                      //store the information concerning all exits into an array
1851                      output.println("struct exitstates * exitstatesarray_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"[]={");
1852                      for( int j = 0; j<nbexit; j++){
1853                          if( j != nbexit-1)output.println("&exitstates"+j+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+",");
1854                          else output.println("&exitstates"+j+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"};\n");
1855                      }
1856
1857
1858                      //generate optionaltaskdescriptor that actually includes exit fses, predicate and the task concerned
1859                      output.println("struct optionaltaskdescriptor optionaltaskdescriptor_"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"={");
1860                      output.println("task_"+otd.td.getSafeSymbol()+",");
1861                      output.println("/*number of members */"+predicateindex+",");
1862                      output.println("predicatememberarray_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+",");
1863                      output.println("/*number of exit fses */"+nbexit+",");
1864                      output.println("exitstatearray_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol());
1865                      output.println("};\n");
1866                  }
1867              }
1868              else continue; // if there is no optionals, there is no need to build the rest of the struct
1869
1870              //get all the possible falgstates reachable by an object
1871              Hashtable hashtbtemp = safeexecution.get(cdtemp);
1872              Enumeration fses = hashtbtemp.keys();
1873              int fscounter = 0;
1874              while(fses.hasMoreElements()){
1875                  FlagState fs = (FlagState)fses.nextElement();
1876                  fscounter++;
1877
1878                  //get the set of OptionalTaskDescriptors corresponding
1879                  HashSet availabletasks = (HashSet)hashtbtemp.get(fs);
1880                  //iterate through the OptionalTaskDescriptors and store the pointers to the optionals struct (see on top) into an array
1881
1882                  output.println("struct optionaltaskdescriptor * optionaltaskdescriptorarray_FS"+fscounter+"_"+cdtemp.getSafeSymbol()+"[] = {");
1883                  for(Iterator mos = availabletasks.iterator(); mos.hasNext();){
1884                      OptionalTaskDescriptor mm = (OptionalTaskDescriptor)mos.next();
1885                      if(!mos.hasNext()) output.println("&optionaltaskdescriptor_"+mm.getuid()+"_"+cdtemp.getSafeSymbol()+"};\n");
1886
1887                      else output.println("&optionaltaskdescriptor_"+mm.getuid()+"_"+cdtemp.getSafeSymbol()+",");
1888                  }
1889
1890                  //process flag information (what the flag after failure is) so we know what optionaltaskdescriptors to choose.
1891
1892                  output.println("int flags_FS"+fscounter+"_"+cdtemp.getSafeSymbol()+"[]={");
1893                  for(Iterator flags = fs.getFlags(); flags.hasNext();){
1894                      FlagDescriptor flagd = (FlagDescriptor)flags.next();
1895                      int flagid=1<<((Integer)flaginfo.get(flagd)).intValue();
1896                      if( flags.hasNext() ) output.print("0x"+Integer.toHexString(flagid)+" /*"+Integer.toBinaryString(flagid)+"*/,");
1897                      else  output.print("0x"+Integer.toHexString(flagid)+" /*"+Integer.toBinaryString(flagid)+"*/");
1898
1899                  }
1900                  //process tag information
1901
1902                  int tagcounter = 0;
1903                  //TagExpressionList tagel = fs.getTags();
1904                  //output.println("int predicatetags_"+predicateindex+"_OTD"+otd.getuid()+"_"+cdtemp.getSafeSymbol()+"[]={");
1905                  //BUG...added next line to fix, test with any task program
1906
1907                  //if (tagel!=null){
1908                  //    for(int j=0;j<tagel.numTags();j++) {
1909                  //      if (j!=0)
1910                  //          output.println(",");
1911                  //      TempDescriptor tmp=tagel.getTemp(j);
1912                  //      output.println("/*tagid*/"+state.getTagId(tmp.getTag()));
1913                  //   }
1914                  //  numtags = tagel.numTags();
1915                  //}
1916                  //output.println("};");
1917
1918
1919                  //Store the result in fsanalysiswrapper
1920                  output.println("};\n");
1921                  output.println("struct fsanalysiswrapper fsanalysiswrapper_FS"+fscounter+"_"+cdtemp.getSafeSymbol()+"={");
1922                  output.println("/* number of flags*/"+fs.numFlags()+",");
1923                  output.println("flags_FS"+fscounter+"_"+cdtemp.getSafeSymbol()+",");
1924                  output.println("/* number of tags*/"+tagcounter+",");
1925                  output.println("tags_FS"+fscounter+"_"+cdtemp.getSafeSymbol()+",");
1926                  output.println("/* number of optionaltaskdescriptors */"+availabletasks.size()+",");
1927                  output.println("optionaltaskdescriptorarray_FS"+fscounter+"_"+cdtemp.getSafeSymbol());
1928                  output.println("};\n");
1929
1930              }
1931
1932              //Build the array of fsanalysiswrappers
1933              output.println("struct fsanalysiswrapper * fsanalysiswrapperarray_"+cdtemp.getSafeSymbol()+"[] = {");
1934              for(int i = 0; i<fscounter; i++){
1935                  if(i==fscounter-1) output.println("&fsanalysiswrapper_FS"+(i+1)+"_"+cdtemp.getSafeSymbol()+"};\n");
1936
1937                      else output.println("&fsanalysiswrapper_FS"+(i+1)+"_"+cdtemp.getSafeSymbol()+",");
1938              }
1939
1940              //Build the classanalysiswrapper referring to the previous array
1941              output.println("struct classanalysiswrapper classanalysiswrapper_"+cdtemp.getSafeSymbol()+"={");
1942              output.println("/*type*/"+cdtemp.getId()+",");
1943              output.println("/* number of fsanalysiswrappers */"+fscounter+",");
1944              output.println("fsanalysiswrapperarray_"+cdtemp.getSafeSymbol()+"};\n");
1945              fscounter = 0;
1946              processedcd.add(cdtemp);
1947          }
1948
1949          //build an array containing every classes for which code has been build
1950          output.println("struct classanalysiswrapper * classanalysiswrapperarray[]={");
1951          for(Iterator classit = processedcd.iterator(); classit.hasNext();){
1952              ClassDescriptor cdtemp=(ClassDescriptor)classit.next();
1953              if(!classit.hasNext()) output.println("&classanalysiswrapper_"+cdtemp.getSafeSymbol()+"};\n");
1954              else output.println("&classanalysiswrapper_"+cdtemp.getSafeSymbol()+",");
1955          }
1956          output.println("int numclasses = "+processedcd.size()+";");
1957
1958      }
1959
1960 }
1961
1962
1963
1964
1965
1966