mono/metadata/class.c

   1 /*
   2  * class.c: Class management for the Mono runtime
   3  *
   4  * Author:
   5  *   Miguel de Icaza (miguel@ximian.com)
   6  *
   7  * (C) 2001 Ximian, Inc.
   8  *
   9  * Possible Optimizations:
  10  *     in mono_class_create, do not allocate the class right away,
  11  *     but wait until you know the size of the FieldMap, so that
  12  *     the class embeds directly the FieldMap after the vtable.
  13  *
  14  *
  15  */
  16 #include <config.h>
  17 #include <glib.h>
  18 #include <stdio.h>
  19 #include <string.h>
  20 #include <stdlib.h>
  21 #include <signal.h>
  22 #include <mono/metadata/image.h>
  23 #include <mono/metadata/cil-coff.h>
  24 #include <mono/metadata/metadata.h>
  25 #include <mono/metadata/tabledefs.h>
  26 #include <mono/metadata/tokentype.h>
  27 #include <mono/metadata/class.h>
  28 #include <mono/metadata/object.h>
  29 #include <mono/metadata/appdomain.h>
  30 #include <mono/metadata/mono-endian.h>
  31 #include <mono/metadata/debug-helpers.h>
  32 #if HAVE_BOEHM_GC
  33 #include <gc/gc.h>
  34 #endif
  35
  36 #define CSIZE(x) (sizeof (x) / 4)
  37
  38 MonoStats mono_stats;
  39
  40 gboolean mono_print_vtable = FALSE;
  41
  42 static MonoClass * mono_class_create_from_typedef (MonoImage *image, guint32 type_token);
  43
  44 MonoClass *
  45 mono_class_from_typeref (MonoImage *image, guint32 type_token)
  46 {
  47         guint32 cols [MONO_TYPEREF_SIZE];
  48         MonoTableInfo  *t = &image->tables [MONO_TABLE_TYPEREF];
  49         guint32 idx;
  50         const char *name, *nspace;
  51         MonoClass *res;
  52
  53         mono_metadata_decode_row (t, (type_token&0xffffff)-1, cols, MONO_TYPEREF_SIZE);
  54
  55         name = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAME]);
  56         nspace = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAMESPACE]);
  57
  58         idx = cols [MONO_TYPEREF_SCOPE] >> RESOLTION_SCOPE_BITS;
  59         switch (cols [MONO_TYPEREF_SCOPE] & RESOLTION_SCOPE_MASK) {
  60         case RESOLTION_SCOPE_MODULE:
  61                 if (!idx)
  62                         g_error ("null ResolutionScope not yet handled");
  63                 /* a typedef in disguise */
  64                 return mono_class_from_name (image, nspace, name);
  65         case RESOLTION_SCOPE_MODULEREF:
  66                 return mono_class_from_name (image->assembly->modules [idx - 1], nspace, name);
  67         case RESOLTION_SCOPE_TYPEREF: {
  68                 MonoClass *enclosing = mono_class_from_typeref (image, MONO_TOKEN_TYPE_REF | idx);
  69                 GList *tmp;
  70                 mono_class_init (enclosing);
  71                 for (tmp = enclosing->nested_classes; tmp; tmp = tmp->next) {
  72                         res = tmp->data;
  73                         if (strcmp (res->name, name) == 0)
  74                                 return res;
  75                 }
  76                 g_warning ("TypeRef ResolutionScope not yet handled (%d)", idx);
  77                 return NULL;
  78         }
  79         case RESOLTION_SCOPE_ASSEMBLYREF:
  80                 break;
  81         }
  82
  83         if (!image->references ||  !image->references [idx-1]) {
  84                 /*
  85                  * detected a reference to mscorlib, we simply return a reference to a dummy
  86                  * until we have a better solution.
  87                  */
  88                 fprintf(stderr, "Sending dummy where %s.%s expected\n", mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAMESPACE]), mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAME]));
  89
  90                 res = mono_class_from_name (image, "System", "MonoDummy");
  91                 /* prevent method loading */
  92                 res->dummy = 1;
  93                 /* some storage if the type is used  - very ugly hack */
  94                 res->instance_size = 2*sizeof (gpointer);
  95                 return res;
  96         }
  97
  98         /* load referenced assembly */
  99         image = image->references [idx-1]->image;
 100
 101         return mono_class_from_name (image, nspace, name);
 102 }
 103
 104 /**
 105  * class_compute_field_layout:
 106  * @m: pointer to the metadata.
 107  * @class: The class to initialize
 108  * @pack: the value from the .pack directive (or 0)
 109  *
 110  * Initializes the class->fields.
 111  *
 112  * Currently we only support AUTO_LAYOUT, and do not even try to do
 113  * a good job at it.  This is temporary to get the code for Paolo.
 114  */
 115 static void
 116 class_compute_field_layout (MonoClass *class, int pack)
 117 {
 118         MonoImage *m = class->image;
 119         const int top = class->field.count;
 120         guint32 layout = class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK;
 121         MonoTableInfo *t = &m->tables [MONO_TABLE_FIELD];
 122         int i;
 123         guint32 rva;
 124
 125         /*
 126          * Fetch all the field information.
 127          */
 128         for (i = 0; i < top; i++){
 129                 const char *sig;
 130                 guint32 cols [MONO_FIELD_SIZE];
 131                 int idx = class->field.first + i;
 132
 133                 mono_metadata_decode_row (t, idx, cols, CSIZE (cols));
 134                 /* The name is needed for fieldrefs */
 135                 class->fields [i].name = mono_metadata_string_heap (m, cols [MONO_FIELD_NAME]);
 136                 sig = mono_metadata_blob_heap (m, cols [MONO_FIELD_SIGNATURE]);
 137                 mono_metadata_decode_value (sig, &sig);
 138                 /* FIELD signature == 0x06 */
 139                 g_assert (*sig == 0x06);
 140                 class->fields [i].type = mono_metadata_parse_field_type (
 141                         m, cols [MONO_FIELD_FLAGS], sig + 1, &sig);
 142                 if (cols [MONO_FIELD_FLAGS] & FIELD_ATTRIBUTE_HAS_FIELD_RVA) {
 143                         mono_metadata_field_info (m, idx, NULL, &rva, NULL);
 144                         if (!rva)
 145                                 g_warning ("field %s in %s should have RVA data, but hasn't", class->fields [i].name, class->name);
 146                         class->fields [i].data = mono_cli_rva_map (class->image->image_info, rva);
 147                 }
 148                 if (class->enumtype && !(cols [MONO_FIELD_FLAGS] & FIELD_ATTRIBUTE_STATIC)) {
 149                         class->enum_basetype = class->fields [i].type;
 150                         class->element_class = mono_class_from_mono_type (class->enum_basetype);
 151                 }
 152         }
 153         if (class->enumtype && !class->enum_basetype) {
 154                 if (!((strcmp (class->name, "Enum") == 0) && (strcmp (class->name_space, "System") == 0)))
 155                         G_BREAKPOINT ();
 156         }
 157         /*
 158          * Compute field layout and total size (not considering static fields)
 159          */
 160         switch (layout) {
 161         case TYPE_ATTRIBUTE_AUTO_LAYOUT:
 162         case TYPE_ATTRIBUTE_SEQUENTIAL_LAYOUT:
 163                 for (i = 0; i < top; i++){
 164                         int size, align;
 165
 166                         if (class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC)
 167                                 continue;
 168
 169                         size = mono_type_size (class->fields [i].type, &align);
 170
 171                         /* FIXME (LAMESPEC): should we also change the min alignment according to pack? */
 172                         align = pack? MIN (pack, align): align;
 173                         class->min_align = MAX (align, class->min_align);
 174                         class->fields [i].offset = class->instance_size;
 175                         class->fields [i].offset += align - 1;
 176                         class->fields [i].offset &= ~(align - 1);
 177                         class->instance_size = class->fields [i].offset + size;
 178                 }
 179
 180                 if (class->instance_size & (class->min_align - 1)) {
 181                         class->instance_size += class->min_align - 1;
 182                         class->instance_size &= ~(class->min_align - 1);
 183                 }
 184                 break;
 185         case TYPE_ATTRIBUTE_EXPLICIT_LAYOUT:
 186                 for (i = 0; i < top; i++) {
 187                         int size, align;
 188                         int idx = class->field.first + i;
 189
 190                         /*
 191                          * There must be info about all the fields in a type if it
 192                          * uses explicit layout.
 193                          */
 194
 195                         if (class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC)
 196                                 continue;
 197
 198                         size = mono_type_size (class->fields [i].type, &align);
 199
 200                         mono_metadata_field_info (m, idx, &class->fields [i].offset, NULL, NULL);
 201                         if (class->fields [i].offset == (guint32)-1)
 202                                 g_warning ("%s not initialized correctly (missing field layout info for %s)", class->name, class->fields [i].name);
 203                         /*
 204                          * The offset is from the start of the object: this works for both
 205                          * classes and valuetypes.
 206                          */
 207                         class->fields [i].offset += sizeof (MonoObject);
 208                         /*
 209                          * Calc max size.
 210                          */
 211                         size += class->fields [i].offset;
 212                         class->instance_size = MAX (class->instance_size, size);
 213                 }
 214                 break;
 215         }
 216
 217         class->size_inited = 1;
 218
 219         /*
 220          * Compute static field layout and size
 221          */
 222         switch (layout) {
 223         case TYPE_ATTRIBUTE_AUTO_LAYOUT:
 224         case TYPE_ATTRIBUTE_SEQUENTIAL_LAYOUT:
 225                 for (i = 0; i < top; i++){
 226                         int size, align;
 227
 228                         if (!(class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC))
 229                                 continue;
 230
 231                         size = mono_type_size (class->fields [i].type, &align);
 232                         class->fields [i].offset = class->class_size;
 233                         class->fields [i].offset += align - 1;
 234                         class->fields [i].offset &= ~(align - 1);
 235                         class->class_size = class->fields [i].offset + size;
 236                 }
 237                 break;
 238         case TYPE_ATTRIBUTE_EXPLICIT_LAYOUT:
 239                 for (i = 0; i < top; i++){
 240                         int size, align;
 241
 242                         /*
 243                          * There must be info about all the fields in a type if it
 244                          * uses explicit layout.
 245                          */
 246
 247
 248                         if (!(class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC))
 249                                 continue;
 250
 251                         size = mono_type_size (class->fields [i].type, &align);
 252                         class->fields [i].offset = class->class_size;
 253                         class->fields [i].offset += align - 1;
 254                         class->fields [i].offset &= ~(align - 1);
 255                         class->class_size = class->fields [i].offset + size;
 256                 }
 257                 break;
 258         }
 259 }
 260
 261 static void
 262 init_properties (MonoClass *class)
 263 {
 264         guint startm, endm, i, j;
 265         guint32 cols [MONO_PROPERTY_SIZE];
 266         MonoTableInfo *pt = &class->image->tables [MONO_TABLE_PROPERTY];
 267         MonoTableInfo *msemt = &class->image->tables [MONO_TABLE_METHODSEMANTICS];
 268
 269         class->property.first = mono_metadata_properties_from_typedef (class->image, mono_metadata_token_index (class->type_token) - 1, &class->property.last);
 270         class->property.count = class->property.last - class->property.first;
 271
 272         class->properties = g_new0 (MonoProperty, class->property.count);
 273         for (i = class->property.first; i < class->property.last; ++i) {
 274                 mono_metadata_decode_row (pt, i, cols, MONO_PROPERTY_SIZE);
 275                 class->properties [i - class->property.first].attrs = cols [MONO_PROPERTY_FLAGS];
 276                 class->properties [i - class->property.first].name = mono_metadata_string_heap (class->image, cols [MONO_PROPERTY_NAME]);
 277
 278                 startm = mono_metadata_methods_from_property (class->image, i, &endm);
 279                 for (j = startm; j < endm; ++j) {
 280                         mono_metadata_decode_row (msemt, j, cols, MONO_METHOD_SEMA_SIZE);
 281                         switch (cols [MONO_METHOD_SEMA_SEMANTICS]) {
 282                         case METHOD_SEMANTIC_SETTER:
 283                                 class->properties [i - class->property.first].set = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 284                                 break;
 285                         case METHOD_SEMANTIC_GETTER:
 286                                 class->properties [i - class->property.first].get = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 287                                 break;
 288                         default:
 289                                 break;
 290                         }
 291                 }
 292         }
 293 }
 294
 295 static void
 296 init_events (MonoClass *class)
 297 {
 298         guint startm, endm, i, j;
 299         guint32 cols [MONO_EVENT_SIZE];
 300         MonoTableInfo *pt = &class->image->tables [MONO_TABLE_EVENT];
 301         MonoTableInfo *msemt = &class->image->tables [MONO_TABLE_METHODSEMANTICS];
 302
 303         class->event.first = mono_metadata_events_from_typedef (class->image, mono_metadata_token_index (class->type_token) - 1, &class->event.last);
 304         class->event.count = class->event.last - class->event.first;
 305
 306         class->events = g_new0 (MonoEvent, class->event.count);
 307         for (i = class->event.first; i < class->event.last; ++i) {
 308                 mono_metadata_decode_row (pt, i, cols, MONO_EVENT_SIZE);
 309                 class->events [i - class->event.first].attrs = cols [MONO_EVENT_FLAGS];
 310                 class->events [i - class->event.first].name = mono_metadata_string_heap (class->image, cols [MONO_EVENT_NAME]);
 311
 312                 startm = mono_metadata_methods_from_event (class->image, i, &endm);
 313                 for (j = startm; j < endm; ++j) {
 314                         mono_metadata_decode_row (msemt, j, cols, MONO_METHOD_SEMA_SIZE);
 315                         switch (cols [MONO_METHOD_SEMA_SEMANTICS]) {
 316                         case METHOD_SEMANTIC_ADD_ON:
 317                                 class->events [i - class->event.first].add = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 318                                 break;
 319                         case METHOD_SEMANTIC_REMOVE_ON:
 320                                 class->events [i - class->event.first].remove = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 321                                 break;
 322                         case METHOD_SEMANTIC_FIRE:
 323                                 class->events [i - class->event.first].raise = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 324                                 break;
 325                         case METHOD_SEMANTIC_OTHER: /* don't care for now */
 326                         default:
 327                                 break;
 328                         }
 329                 }
 330         }
 331 }
 332
 333 static guint
 334 mono_get_unique_iid (MonoClass *class)
 335 {
 336         static GHashTable *iid_hash = NULL;
 337         static guint iid = 0;
 338
 339         char *str;
 340         gpointer value;
 341
 342         g_assert (class->flags & TYPE_ATTRIBUTE_INTERFACE);
 343
 344         if (!iid_hash)
 345                 iid_hash = g_hash_table_new (g_str_hash, g_str_equal);
 346
 347         str = g_strdup_printf ("%s|%s.%s\n", class->image->name, class->name_space, class->name);
 348
 349         if (g_hash_table_lookup_extended (iid_hash, str, NULL, &value)) {
 350                 g_free (str);
 351                 return (guint)value;
 352         } else {
 353                 g_hash_table_insert (iid_hash, str, (gpointer)iid);
 354                 ++iid;
 355         }
 356
 357         return iid - 1;
 358 }
 359
 360 /**
 361  * mono_class_init:
 362  * @class: the class to initialize
 363  *
 364  * compute the instance_size, class_size and other infos that cannot be
 365  * computed at mono_class_get() time. Also compute a generic vtable and
 366  * the method slot numbers. We use this infos later to create a domain
 367  * specific vtable.
 368  */
 369 void
 370 mono_class_init (MonoClass *class)
 371 {
 372         MonoClass *k, *ic;
 373         MonoMethod **vtable;
 374         int i, max_vtsize = 0, max_iid, cur_slot = 0;
 375         static MonoMethod *default_ghc = NULL;
 376         static MonoMethod *default_finalize = NULL;
 377         static int finalize_slot = -1;
 378         static int ghc_slot = -1;
 379         guint32 packing_size = 0;
 380
 381         g_assert (class);
 382
 383         if (class->inited)
 384                 return;
 385
 386         if (class->init_pending) {
 387                 /* this indicates a cyclic dependency */
 388                 g_error ("pending init %s.%s\n", class->name_space, class->name);
 389         }
 390
 391         class->init_pending = 1;
 392
 393         mono_stats.initialized_class_count++;
 394
 395         if (class->parent) {
 396                 if (!class->parent->inited)
 397                         mono_class_init (class->parent);
 398                 class->instance_size += class->parent->instance_size;
 399                 class->class_size += class->parent->class_size;
 400                 class->min_align = class->parent->min_align;
 401                 cur_slot = class->parent->vtable_size;
 402         } else
 403                 class->min_align = 1;
 404
 405         if (mono_metadata_packing_from_typedef (class->image, class->type_token, &packing_size, &class->instance_size))
 406                 class->instance_size += sizeof (MonoObject);
 407         /* use packing_size in field layout */
 408
 409         /*
 410          * Computes the size used by the fields, and their locations
 411          */
 412         if (!class->size_inited && class->field.count > 0){
 413                 class->fields = g_new0 (MonoClassField, class->field.count);
 414                 class_compute_field_layout (class, packing_size);
 415         }
 416
 417         if (!(class->flags & TYPE_ATTRIBUTE_INTERFACE)) {
 418                 for (i = 0; i < class->interface_count; i++)
 419                         max_vtsize += class->interfaces [i]->method.count;
 420
 421                 if (class->parent)
 422                         max_vtsize += class->parent->vtable_size;
 423
 424                 max_vtsize += class->method.count;
 425         }
 426
 427         vtable = alloca (sizeof (gpointer) * max_vtsize);
 428         memset (vtable, 0, sizeof (gpointer) * max_vtsize);
 429
 430         /* initialize method pointers */
 431         class->methods = g_new (MonoMethod*, class->method.count);
 432         for (i = 0; i < class->method.count; ++i)
 433                 class->methods [i] = mono_get_method (class->image,
 434                         MONO_TOKEN_METHOD_DEF | (i + class->method.first + 1), class);
 435
 436         init_properties (class);
 437         init_events (class);
 438
 439         i = mono_metadata_nesting_typedef (class->image, class->type_token);
 440         while (i) {
 441                 MonoClass* nclass;
 442                 guint32 cols [MONO_NESTED_CLASS_SIZE];
 443                 mono_metadata_decode_row (&class->image->tables [MONO_TABLE_NESTEDCLASS], i - 1, cols, MONO_NESTED_CLASS_SIZE);
 444                 if (cols [MONO_NESTED_CLASS_ENCLOSING] != mono_metadata_token_index (class->type_token))
 445                         break;
 446                 nclass = mono_class_create_from_typedef (class->image, MONO_TOKEN_TYPE_DEF | cols [MONO_NESTED_CLASS_NESTED]);
 447                 class->nested_classes = g_list_prepend (class->nested_classes, nclass);
 448                 ++i;
 449         }
 450
 451         if (class->flags & TYPE_ATTRIBUTE_INTERFACE) {
 452                 for (i = 0; i < class->method.count; ++i)
 453                         class->methods [i]->slot = i;
 454                 class->init_pending = 0;
 455                 class->inited = 1;
 456                 return;
 457         }
 458
 459         /* printf ("METAINIT %s.%s\n", class->name_space, class->name); */
 460
 461         /* compute maximum number of slots and maximum interface id */
 462         max_iid = 0;
 463         for (k = class; k ; k = k->parent) {
 464                 for (i = 0; i < k->interface_count; i++) {
 465                         ic = k->interfaces [i];
 466
 467                         if (!ic->inited)
 468                                 mono_class_init (ic);
 469
 470                         if (max_iid < ic->interface_id)
 471                                 max_iid = ic->interface_id;
 472                 }
 473         }
 474
 475         class->max_interface_id = max_iid;
 476         /* compute vtable offset for interfaces */
 477         class->interface_offsets = g_malloc (sizeof (gpointer) * (max_iid + 1));
 478
 479         for (i = 0; i <= max_iid; i++)
 480                 class->interface_offsets [i] = -1;
 481
 482         for (i = 0; i < class->interface_count; i++) {
 483                 ic = class->interfaces [i];
 484                 class->interface_offsets [ic->interface_id] = cur_slot;
 485                 cur_slot += ic->method.count;
 486         }
 487
 488         for (k = class->parent; k ; k = k->parent) {
 489                 for (i = 0; i < k->interface_count; i++) {
 490                         ic = k->interfaces [i];
 491                         if (class->interface_offsets [ic->interface_id] == -1) {
 492                                 int io = k->interface_offsets [ic->interface_id];
 493
 494                                 g_assert (io >= 0);
 495                                 g_assert (io <= max_vtsize);
 496
 497                                 class->interface_offsets [ic->interface_id] = io;
 498                         }
 499                 }
 500         }
 501
 502         if (class->parent && class->parent->vtable_size)
 503                 memcpy (vtable, class->parent->vtable,  sizeof (gpointer) * class->parent->vtable_size);
 504
 505         for (k = class; k ; k = k->parent) {
 506                 for (i = 0; i < k->interface_count; i++) {
 507                         int j, l, io;
 508
 509                         ic = k->interfaces [i];
 510                         io = k->interface_offsets [ic->interface_id];
 511
 512                         g_assert (io >= 0);
 513                         g_assert (io <= max_vtsize);
 514
 515                         if (k == class) {
 516                                 for (l = 0; l < ic->method.count; l++) {
 517                                         MonoMethod *im = ic->methods [l];
 518                                         for (j = 0; j < class->method.count; ++j) {
 519                                                 MonoMethod *cm = class->methods [j];
 520                                                 if (!(cm->flags & METHOD_ATTRIBUTE_VIRTUAL) ||
 521                                                     !(cm->flags & METHOD_ATTRIBUTE_PUBLIC) ||
 522                                                     !(cm->flags & METHOD_ATTRIBUTE_NEW_SLOT))
 523                                                         continue;
 524                                                 if (!strcmp(cm->name, im->name) &&
 525                                                     mono_metadata_signature_equal (cm->signature, im->signature)) {
 526                                                         g_assert (io + l <= max_vtsize);
 527                                                         vtable [io + l] = cm;
 528                                                 }
 529                                         }
 530                                 }
 531                         } else {
 532                                 /* already implemented */
 533                                 if (io >= k->vtable_size)
 534                                         continue;
 535                         }
 536
 537                         for (l = 0; l < ic->method.count; l++) {
 538                                 MonoMethod *im = ic->methods [l];
 539                                 MonoClass *k1;
 540
 541                                 g_assert (io + l <= max_vtsize);
 542
 543                                 if (vtable [io + l])
 544                                         continue;
 545
 546                                 for (k1 = class; k1; k1 = k1->parent) {
 547                                         for (j = 0; j < k1->method.count; ++j) {
 548                                                 MonoMethod *cm = k1->methods [j];
 549
 550                                                 if (!(cm->flags & METHOD_ATTRIBUTE_VIRTUAL) ||
 551                                                     !(cm->flags & METHOD_ATTRIBUTE_PUBLIC))
 552                                                         continue;
 553
 554                                                 if (!strcmp(cm->name, im->name) &&
 555                                                     mono_metadata_signature_equal (cm->signature, im->signature)) {
 556                                                         g_assert (io + l <= max_vtsize);
 557                                                         vtable [io + l] = cm;
 558                                                         break;
 559                                                 }
 560
 561                                         }
 562                                         g_assert (io + l <= max_vtsize);
 563                                         if (vtable [io + l])
 564                                                 break;
 565                                 }
 566                         }
 567
 568                         for (l = 0; l < ic->method.count; l++) {
 569                                 MonoMethod *im = ic->methods [l];
 570                                 char *qname, *fqname;
 571
 572                                 qname = g_strconcat (ic->name, ".", im->name, NULL);
 573                                 if (ic->name_space && ic->name_space [0])
 574                                         fqname = g_strconcat (ic->name_space, ".", ic->name, ".", im->name, NULL);
 575                                 else
 576                                         fqname = NULL;
 577
 578                                 for (j = 0; j < class->method.count; ++j) {
 579                                         MonoMethod *cm = class->methods [j];
 580
 581                                         if (!(cm->flags & METHOD_ATTRIBUTE_VIRTUAL))
 582                                                 continue;
 583
 584                                         if (((fqname && !strcmp (cm->name, fqname)) || !strcmp (cm->name, qname)) &&
 585                                             mono_metadata_signature_equal (cm->signature, im->signature)) {
 586                                                 g_assert (io + l <= max_vtsize);
 587                                                 vtable [io + l] = cm;
 588                                                 break;
 589                                         }
 590                                 }
 591                                 g_free (qname);
 592                                 g_free (fqname);
 593                         }
 594
 595
 596                         if (!(class->flags & TYPE_ATTRIBUTE_ABSTRACT)) {
 597                                 for (l = 0; l < ic->method.count; l++) {
 598                                         char *msig;
 599                                         MonoMethod *im = ic->methods [l];
 600                                         g_assert (io + l <= max_vtsize);
 601                                         if (!(vtable [io + l])) {
 602                                                 msig = mono_signature_get_desc (im->signature, FALSE);
 603                                                 printf ("no implementation for interface method %s.%s::%s(%s) in class %s.%s\n",
 604                                                         ic->name_space, ic->name, im->name, msig, class->name_space, class->name);
 605                                                 g_free (msig);
 606                                                 for (j = 0; j < class->method.count; ++j) {
 607                                                         MonoMethod *cm = class->methods [j];
 608                                                         msig = mono_signature_get_desc (cm->signature, FALSE);
 609
 610                                                         printf ("METHOD %s(%s)\n", cm->name, msig);
 611                                                         g_free (msig);
 612                                                 }
 613                                                 g_assert_not_reached ();
 614                                         }
 615                                 }
 616                         }
 617
 618                         for (l = 0; l < ic->method.count; l++) {
 619                                 MonoMethod *im = vtable [io + l];
 620
 621                                 if (im) {
 622                                         g_assert (io + l <= max_vtsize);
 623                                         if (im->slot < 0) {
 624                                                 /* FIXME: why do we need this ? */
 625                                                 im->slot = io + l;
 626                                                 /* g_assert_not_reached (); */
 627                                         }
 628                                 }
 629                         }
 630                 }
 631         }
 632
 633         for (i = 0; i < class->method.count; ++i) {
 634                 MonoMethod *cm;
 635
 636                 cm = class->methods [i];
 637
 638
 639 #if 0
 640                 if (!(cm->flags & METHOD_ATTRIBUTE_VIRTUAL) ||
 641                     (cm->slot >= 0))
 642                         continue;
 643 #else  /* EXT_VTABLE_HACK */
 644                 if (cm->slot >= 0)
 645                         continue;
 646 #endif
 647
 648                 if (!(cm->flags & METHOD_ATTRIBUTE_NEW_SLOT) && (cm->flags & METHOD_ATTRIBUTE_VIRTUAL)) {
 649                         for (k = class->parent; k ; k = k->parent) {
 650                                 int j;
 651                                 for (j = 0; j < k->method.count; ++j) {
 652                                         MonoMethod *m1 = k->methods [j];
 653                                         if (!(m1->flags & METHOD_ATTRIBUTE_VIRTUAL))
 654                                                 continue;
 655                                         if (!strcmp(cm->name, m1->name) &&
 656                                             mono_metadata_signature_equal (cm->signature, m1->signature)) {
 657                                                 cm->slot = k->methods [j]->slot;
 658                                                 g_assert (cm->slot < max_vtsize);
 659                                                 break;
 660                                         }
 661                                 }
 662                                 if (cm->slot >= 0)
 663                                         break;
 664                         }
 665                 }
 666
 667                 if (cm->slot < 0)
 668                         cm->slot = cur_slot++;
 669
 670                 if (!(cm->flags & METHOD_ATTRIBUTE_ABSTRACT))
 671                         vtable [cm->slot] = cm;
 672         }
 673
 674
 675         class->vtable_size = cur_slot;
 676         class->vtable = g_malloc0 (sizeof (gpointer) * class->vtable_size);
 677         memcpy (class->vtable, vtable,  sizeof (gpointer) * class->vtable_size);
 678
 679         class->inited = 1;
 680         class->init_pending = 0;
 681
 682         if (mono_print_vtable) {
 683                 int icount = 0;
 684
 685                 for (i = 0; i <= max_iid; i++)
 686                         if (class->interface_offsets [i] != -1)
 687                                 icount++;
 688
 689                 printf ("VTable %s.%s (size = %d, interfaces = %d)\n", class->name_space,
 690                         class->name, class->vtable_size, icount);
 691
 692                 for (i = 0; i < class->vtable_size; ++i) {
 693                         MonoMethod *cm;
 694
 695                         cm = vtable [i];
 696                         if (cm) {
 697                                 printf ("  slot %03d(%03d) %s.%s:%s\n", i, cm->slot,
 698                                         cm->klass->name_space, cm->klass->name,
 699                                         cm->name);
 700                         }
 701                 }
 702
 703
 704                 if (icount) {
 705                         printf ("Interfaces %s.%s (max_iid = %d)\n", class->name_space,
 706                                 class->name, max_iid);
 707
 708                         for (i = 0; i < class->interface_count; i++) {
 709                                 ic = class->interfaces [i];
 710                                 printf ("  slot %03d(%03d) %s.%s\n",
 711                                         class->interface_offsets [ic->interface_id],
 712                                         ic->method.count, ic->name_space, ic->name);
 713                         }
 714
 715                         for (k = class->parent; k ; k = k->parent) {
 716                                 for (i = 0; i < k->interface_count; i++) {
 717                                         ic = k->interfaces [i];
 718                                         printf ("  slot %03d(%03d) %s.%s\n",
 719                                                 class->interface_offsets [ic->interface_id],
 720                                                 ic->method.count, ic->name_space, ic->name);
 721                                 }
 722                         }
 723                 }
 724         }
 725
 726         if (!default_ghc) {
 727                 if (class == mono_defaults.object_class) {
 728
 729                         for (i = 0; i < class->vtable_size; ++i) {
 730                                 MonoMethod *cm = vtable [i];
 731
 732                                 if (!strcmp (cm->name, "GetHashCode")) {
 733                                         ghc_slot = i;
 734                                         break;
 735                                 }
 736                         }
 737
 738                         g_assert (ghc_slot > 0);
 739
 740                         default_ghc = vtable [ghc_slot];
 741                 }
 742         }
 743
 744         class->ghcimpl = 1;
 745         if (class != mono_defaults.object_class) {
 746
 747                 if (vtable [ghc_slot] == default_ghc) {
 748                         class->ghcimpl = 0;
 749                 }
 750         }
 751
 752         if (!default_finalize) {
 753                 if (class == mono_defaults.object_class) {
 754
 755                         for (i = 0; i < class->vtable_size; ++i) {
 756                                 MonoMethod *cm = vtable [i];
 757
 758                                 if (!strcmp (cm->name, "Finalize")) {
 759                                         finalize_slot = i;
 760                                         break;
 761                                 }
 762                         }
 763
 764                         g_assert (finalize_slot > 0);
 765
 766                         default_finalize = vtable [finalize_slot];
 767                 }
 768         }
 769
 770         /* Object::Finalize should have empty implemenatation */
 771         class->has_finalize = 0;
 772         if (class != mono_defaults.object_class) {
 773                 if (vtable [finalize_slot] != default_finalize)
 774                         class->has_finalize = 1;
 775         }
 776 }
 777
 778
 779 /*
 780  * Compute a relative numbering of the class hierarchy as described in
 781  * "Java for Large-Scale Scientific Computations?"
 782  */
 783 static void
 784 mono_compute_relative_numbering (MonoClass *class, int *c)
 785 {
 786         GList *s;
 787
 788         (*c)++;
 789
 790         class->baseval = *c;
 791
 792         for (s = class->subclasses; s; s = s->next)
 793                 mono_compute_relative_numbering ((MonoClass *)s->data, c);
 794
 795         class->diffval = *c -  class->baseval;
 796 }
 797
 798 void
 799 mono_class_setup_mono_type (MonoClass *class)
 800 {
 801         const char *name = class->name;
 802         const char *nspace = class->name_space;
 803
 804         class->this_arg.byref = 1;
 805         class->this_arg.data.klass = class;
 806         class->this_arg.type = MONO_TYPE_CLASS;
 807         class->byval_arg.data.klass = class;
 808         class->byval_arg.type = MONO_TYPE_CLASS;
 809
 810         if (!strcmp (nspace, "System")) {
 811                 if (!strcmp (name, "ValueType")) {
 812                         /*
 813                          * do not set the valuetype bit for System.ValueType.
 814                          * class->valuetype = 1;
 815                          */
 816                 } else if (!strcmp (name, "Enum")) {
 817                         /*
 818                          * do not set the valuetype bit for System.Enum.
 819                          * class->valuetype = 1;
 820                          */
 821                         class->valuetype = 0;
 822                         class->enumtype = 0;
 823                 } else if (!strcmp (name, "Object")) {
 824                         class->this_arg.type = class->byval_arg.type = MONO_TYPE_OBJECT;
 825                 } else if (!strcmp (name, "String")) {
 826                         class->this_arg.type = class->byval_arg.type = MONO_TYPE_STRING;
 827                 }
 828         }
 829
 830         if (class->valuetype) {
 831                 int t = MONO_TYPE_VALUETYPE;
 832                 if (!strcmp (nspace, "System")) {
 833                         switch (*name) {
 834                         case 'B':
 835                                 if (!strcmp (name, "Boolean")) {
 836                                         t = MONO_TYPE_BOOLEAN;
 837                                 } else if (!strcmp(name, "Byte")) {
 838                                         t = MONO_TYPE_U1;
 839                                 }
 840                                 break;
 841                         case 'C':
 842                                 if (!strcmp (name, "Char")) {
 843                                         t = MONO_TYPE_CHAR;
 844                                 }
 845                                 break;
 846                         case 'D':
 847                                 if (!strcmp (name, "Double")) {
 848                                         t = MONO_TYPE_R8;
 849                                 }
 850                                 break;
 851                         case 'I':
 852                                 if (!strcmp (name, "Int32")) {
 853                                         t = MONO_TYPE_I4;
 854                                 } else if (!strcmp(name, "Int16")) {
 855                                         t = MONO_TYPE_I2;
 856                                 } else if (!strcmp(name, "Int64")) {
 857                                         t = MONO_TYPE_I8;
 858                                 } else if (!strcmp(name, "IntPtr")) {
 859                                         t = MONO_TYPE_I;
 860                                 }
 861                                 break;
 862                         case 'S':
 863                                 if (!strcmp (name, "Single")) {
 864                                         t = MONO_TYPE_R4;
 865                                 } else if (!strcmp(name, "SByte")) {
 866                                         t = MONO_TYPE_I1;
 867                                 }
 868                                 break;
 869                         case 'U':
 870                                 if (!strcmp (name, "UInt32")) {
 871                                         t = MONO_TYPE_U4;
 872                                 } else if (!strcmp(name, "UInt16")) {
 873                                         t = MONO_TYPE_U2;
 874                                 } else if (!strcmp(name, "UInt64")) {
 875                                         t = MONO_TYPE_U8;
 876                                 } else if (!strcmp(name, "UIntPtr")) {
 877                                         t = MONO_TYPE_U;
 878                                 }
 879                                 break;
 880                         case 'V':
 881                                 if (!strcmp (name, "Void")) {
 882                                         t = MONO_TYPE_VOID;
 883                                 }
 884                                 break;
 885                         default:
 886                                 break;
 887                         }
 888                 }
 889                 class->this_arg.type = class->byval_arg.type = t;
 890         }
 891 }
 892
 893 void
 894 mono_class_setup_parent (MonoClass *class, MonoClass *parent)
 895 {
 896         gboolean system_namespace;
 897
 898         system_namespace = !strcmp (class->name_space, "System");
 899
 900         /* if root of the hierarchy */
 901         if (system_namespace && !strcmp (class->name, "Object")) {
 902                 class->parent = NULL;
 903                 class->instance_size = sizeof (MonoObject);
 904                 return;
 905         }
 906         if (!strcmp (class->name, "<Module>")) {
 907                 class->parent = NULL;
 908                 class->instance_size = 0;
 909                 return;
 910         }
 911
 912         if (!(class->flags & TYPE_ATTRIBUTE_INTERFACE)) {
 913                 int rnum = 0;
 914                 class->parent = parent;
 915
 916                 if (!parent)
 917                         g_assert_not_reached (); /* FIXME */
 918
 919                 class->marshalbyref = parent->marshalbyref;
 920                 class->contextbound  = parent->contextbound;
 921                 class->delegate  = parent->delegate;
 922
 923                 if (system_namespace) {
 924                         if (*class->name == 'M' && !strcmp (class->name, "MarshalByRefObject"))
 925                                 class->marshalbyref = 1;
 926
 927                         if (*class->name == 'C' && !strcmp (class->name, "ContextBoundObject"))
 928                                 class->contextbound  = 1;
 929
 930                         if (*class->name == 'D' && !strcmp (class->name, "Delegate"))
 931                                 class->delegate  = 1;
 932                 }
 933
 934                 if (class->parent->enumtype || ((strcmp (class->parent->name, "ValueType") == 0) &&
 935                                                 (strcmp (class->parent->name_space, "System") == 0)))
 936                         class->valuetype = 1;
 937                 if (((strcmp (class->parent->name, "Enum") == 0) && (strcmp (class->parent->name_space, "System") == 0))) {
 938                         class->valuetype = class->enumtype = 1;
 939                 }
 940                 /*class->enumtype = class->parent->enumtype; */
 941                 class->parent->subclasses = g_list_prepend (class->parent->subclasses, class);
 942                 mono_compute_relative_numbering (mono_defaults.object_class, &rnum);
 943         } else {
 944                 class->parent = NULL;
 945         }
 946
 947 }
 948
 949 /**
 950  * @image: context where the image is created
 951  * @type_token:  typedef token
 952  */
 953 static MonoClass *
 954 mono_class_create_from_typedef (MonoImage *image, guint32 type_token)
 955 {
 956         MonoTableInfo *tt = &image->tables [MONO_TABLE_TYPEDEF];
 957         MonoClass *class, *parent = NULL;
 958         guint32 cols [MONO_TYPEDEF_SIZE];
 959         guint32 cols_next [MONO_TYPEDEF_SIZE];
 960         guint tidx = mono_metadata_token_index (type_token);
 961         const char *name, *nspace;
 962         guint icount = 0;
 963         MonoClass **interfaces;
 964
 965         if ((class = g_hash_table_lookup (image->class_cache, GUINT_TO_POINTER (type_token))))
 966                 return class;
 967
 968         g_assert (mono_metadata_token_table (type_token) == MONO_TABLE_TYPEDEF);
 969
 970         mono_metadata_decode_row (tt, tidx - 1, cols, MONO_TYPEDEF_SIZE);
 971
 972         name = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
 973         nspace = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);
 974
 975         if (cols [MONO_TYPEDEF_EXTENDS])
 976                 parent = mono_class_get (image, mono_metadata_token_from_dor (cols [MONO_TYPEDEF_EXTENDS]));
 977         interfaces = mono_metadata_interfaces_from_typedef (image, type_token, &icount);
 978
 979         class = g_malloc0 (sizeof (MonoClass));
 980
 981         g_hash_table_insert (image->class_cache, GUINT_TO_POINTER (type_token), class);
 982
 983         class->interfaces = interfaces;
 984         class->interface_count = icount;
 985
 986         class->name = name;
 987         class->name_space = nspace;
 988
 989         class->image = image;
 990         class->type_token = type_token;
 991         class->flags = cols [MONO_TYPEDEF_FLAGS];
 992
 993         class->element_class = class;
 994
 995         /*g_print ("Init class %s\n", name);*/
 996
 997         mono_class_setup_parent (class, parent);
 998
 999         mono_class_setup_mono_type (class);
1000
1001         /*
1002          * Compute the field and method lists
1003          */
1004         class->field.first  = cols [MONO_TYPEDEF_FIELD_LIST] - 1;
1005         class->method.first = cols [MONO_TYPEDEF_METHOD_LIST] - 1;
1006
1007         if (tt->rows > tidx){
1008                 mono_metadata_decode_row (tt, tidx, cols_next, CSIZE (cols_next));
1009                 class->field.last  = cols_next [MONO_TYPEDEF_FIELD_LIST] - 1;
1010                 class->method.last = cols_next [MONO_TYPEDEF_METHOD_LIST] - 1;
1011         } else {
1012                 class->field.last  = image->tables [MONO_TABLE_FIELD].rows;
1013                 class->method.last = image->tables [MONO_TABLE_METHOD].rows;
1014         }
1015
1016         if (cols [MONO_TYPEDEF_FIELD_LIST] &&
1017             cols [MONO_TYPEDEF_FIELD_LIST] <= image->tables [MONO_TABLE_FIELD].rows)
1018                 class->field.count = class->field.last - class->field.first;
1019         else
1020                 class->field.count = 0;
1021
1022         if (cols [MONO_TYPEDEF_METHOD_LIST] <= image->tables [MONO_TABLE_METHOD].rows)
1023                 class->method.count = class->method.last - class->method.first;
1024         else
1025                 class->method.count = 0;
1026
1027         /* reserve space to store vector pointer in arrays */
1028         if (!strcmp (nspace, "System") && !strcmp (name, "Array")) {
1029                 class->instance_size += 2 * sizeof (gpointer);
1030                 g_assert (class->field.count == 0);
1031         }
1032
1033         if (class->flags & TYPE_ATTRIBUTE_INTERFACE)
1034                 class->interface_id = mono_get_unique_iid (class);
1035
1036         /*class->interfaces = mono_metadata_interfaces_from_typedef (image, type_token, &class->interface_count); */
1037
1038         if (class->enumtype) {
1039                 class->fields = g_new0 (MonoClassField, class->field.count);
1040                 class_compute_field_layout (class, 0);
1041         }
1042
1043         if ((type_token = mono_metadata_nested_in_typedef (image, type_token)))
1044                 class->nested_in = mono_class_create_from_typedef (image, type_token);
1045         return class;
1046 }
1047
1048 MonoClass *
1049 mono_ptr_class_get (MonoType *type)
1050 {
1051         MonoClass *result;
1052         MonoClass *el_class;
1053         static GHashTable *ptr_hash = NULL;
1054
1055         if (!ptr_hash)
1056                 ptr_hash = g_hash_table_new (g_direct_hash, g_direct_equal);
1057         el_class = mono_class_from_mono_type (type);
1058         if ((result = g_hash_table_lookup (ptr_hash, el_class)))
1059                 return result;
1060         result = g_new0 (MonoClass, 1);
1061
1062         result->parent = NULL; /* no parent for PTR types */
1063         result->name = "System";
1064         result->name_space = "MonoPtrFakeClass";
1065         result->image = el_class->image;
1066         result->inited = TRUE;
1067         /* Can pointers get boxed? */
1068         result->instance_size = sizeof (gpointer);
1069         /*
1070          * baseval, diffval: need them to allow casting ?
1071          */
1072         result->element_class = el_class;
1073         result->enum_basetype = &result->element_class->byval_arg;
1074
1075         result->this_arg.type = result->byval_arg.type = MONO_TYPE_PTR;
1076         result->this_arg.data.type = result->byval_arg.data.type = result->enum_basetype;
1077         result->this_arg.byref = TRUE;
1078
1079         g_hash_table_insert (ptr_hash, el_class, result);
1080
1081         return result;
1082 }
1083
1084 MonoClass *
1085 mono_class_from_mono_type (MonoType *type)
1086 {
1087         switch (type->type) {
1088         case MONO_TYPE_OBJECT:
1089                 return mono_defaults.object_class;
1090         case MONO_TYPE_VOID:
1091                 return mono_defaults.void_class;
1092         case MONO_TYPE_BOOLEAN:
1093                 return mono_defaults.boolean_class;
1094         case MONO_TYPE_CHAR:
1095                 return mono_defaults.char_class;
1096         case MONO_TYPE_I1:
1097                 return mono_defaults.sbyte_class;
1098         case MONO_TYPE_U1:
1099                 return mono_defaults.byte_class;
1100         case MONO_TYPE_I2:
1101                 return mono_defaults.int16_class;
1102         case MONO_TYPE_U2:
1103                 return mono_defaults.uint16_class;
1104         case MONO_TYPE_I4:
1105                 return mono_defaults.int32_class;
1106         case MONO_TYPE_U4:
1107                 return mono_defaults.uint32_class;
1108         case MONO_TYPE_I:
1109                 return mono_defaults.int_class;
1110         case MONO_TYPE_U:
1111                 return mono_defaults.uint_class;
1112         case MONO_TYPE_I8:
1113                 return mono_defaults.int64_class;
1114         case MONO_TYPE_U8:
1115                 return mono_defaults.uint64_class;
1116         case MONO_TYPE_R4:
1117                 return mono_defaults.single_class;
1118         case MONO_TYPE_R8:
1119                 return mono_defaults.double_class;
1120         case MONO_TYPE_STRING:
1121                 return mono_defaults.string_class;
1122         case MONO_TYPE_ARRAY:
1123                 return mono_array_class_get (type->data.array->type, type->data.array->rank);
1124         case MONO_TYPE_PTR:
1125                 return mono_ptr_class_get (type->data.type);
1126         case MONO_TYPE_SZARRAY:
1127                 return mono_array_class_get (type->data.type, 1);
1128         case MONO_TYPE_CLASS:
1129         case MONO_TYPE_VALUETYPE:
1130                 return type->data.klass;
1131         default:
1132                 g_warning ("implement me %02x\n", type->type);
1133                 g_assert_not_reached ();
1134         }
1135
1136         return NULL;
1137 }
1138
1139 /**
1140  * @image: context where the image is created
1141  * @type_spec:  typespec token
1142  */
1143 static MonoClass *
1144 mono_class_create_from_typespec (MonoImage *image, guint32 type_spec)
1145 {
1146         MonoType *type;
1147         MonoClass *class;
1148
1149         type = mono_type_create_from_typespec (image, type_spec);
1150
1151         switch (type->type) {
1152         case MONO_TYPE_ARRAY:
1153                 class = mono_array_class_get (type->data.array->type, type->data.array->rank);
1154                 break;
1155         case MONO_TYPE_SZARRAY:
1156                 class = mono_array_class_get (type->data.type, 1);
1157                 break;
1158         case MONO_TYPE_PTR:
1159                 class = mono_class_from_mono_type (type->data.type);
1160                 break;
1161         default:
1162                 /* it seems any type can be stored in TypeSpec as well */
1163                 class = mono_class_from_mono_type (type);
1164                 break;
1165         }
1166
1167         mono_metadata_free_type (type);
1168
1169         return class;
1170 }
1171
1172 /**
1173  * mono_array_class_get:
1174  * @element_type: element type
1175  * @rank: the dimension of the array class
1176  *
1177  * Returns: a class object describing the array with element type @element_type and
1178  * dimension @rank.
1179  */
1180 MonoClass *
1181 mono_array_class_get (MonoType *element_type, guint32 rank)
1182 {
1183         MonoClass *eclass;
1184         MonoImage *image;
1185         MonoClass *class;
1186         MonoClass *parent = NULL;
1187         GSList *list;
1188         int rnum = 0;
1189
1190         eclass = mono_class_from_mono_type (element_type);
1191         g_assert (rank <= 255);
1192
1193         parent = mono_defaults.array_class;
1194
1195         if (!parent->inited)
1196                 mono_class_init (parent);
1197
1198         image = eclass->image;
1199
1200         if ((list = g_hash_table_lookup (image->array_cache, element_type))) {
1201                 for (; list; list = list->next) {
1202                         class = list->data;
1203                         if (class->rank == rank)
1204                                 return class;
1205                 }
1206         }
1207
1208         class = g_malloc0 (sizeof (MonoClass) + parent->vtable_size * sizeof (gpointer));
1209
1210         class->image = image;
1211         class->name_space = "System";
1212         class->name = "Array";
1213         class->type_token = 0;
1214         class->flags = TYPE_ATTRIBUTE_CLASS;
1215         class->parent = parent;
1216         class->instance_size = mono_class_instance_size (class->parent);
1217         class->class_size = 0;
1218         class->vtable_size = parent->vtable_size;
1219         class->parent->subclasses = g_list_prepend (class->parent->subclasses, class);
1220         mono_compute_relative_numbering (mono_defaults.object_class, &rnum);
1221
1222         class->rank = rank;
1223         class->element_class = eclass;
1224         if (rank > 1) {
1225                 MonoArrayType *at = g_new0 (MonoArrayType, 1);
1226                 class->byval_arg.type = MONO_TYPE_ARRAY;
1227                 class->byval_arg.data.array = at;
1228                 at->type = &eclass->byval_arg;
1229                 at->rank = rank;
1230                 /* FIXME: complete.... */
1231         } else {
1232                 /* FIXME: this is not correct. the lbound could be >0 */
1233                 class->byval_arg.type = MONO_TYPE_SZARRAY;
1234                 class->byval_arg.data.type = &eclass->byval_arg;
1235         }
1236         class->this_arg = class->byval_arg;
1237         class->this_arg.byref = 1;
1238
1239         list = g_slist_append (list, class);
1240         g_hash_table_insert (image->array_cache, &class->element_class->byval_arg, list);
1241         return class;
1242 }
1243
1244 /**
1245  * mono_class_instance_size:
1246  * @klass: a class
1247  *
1248  * Returns: the size of an object instance
1249  */
1250 gint32
1251 mono_class_instance_size (MonoClass *klass)
1252 {
1253
1254         if (!klass->size_inited)
1255                 mono_class_init (klass);
1256
1257         return klass->instance_size;
1258 }
1259
1260 /**
1261  * mono_class_value_size:
1262  * @klass: a class
1263  *
1264  * This function is used for value types, and return the
1265  * space and the alignment to store that kind of value object.
1266  *
1267  * Returns: the size of a value of kind @klass
1268  */
1269 gint32
1270 mono_class_value_size      (MonoClass *klass, guint32 *align)
1271 {
1272         gint32 size;
1273
1274         /* fixme: check disable, because we still have external revereces to
1275          * mscorlib and Dummy Objects
1276          */
1277         /*g_assert (klass->valuetype);*/
1278
1279         size = mono_class_instance_size (klass) - sizeof (MonoObject);
1280
1281         if (align)
1282                 *align = klass->min_align;
1283
1284         return size;
1285 }
1286
1287 /**
1288  * mono_class_data_size:
1289  * @klass: a class
1290  *
1291  * Returns: the size of the static class data
1292  */
1293 gint32
1294 mono_class_data_size (MonoClass *klass)
1295 {
1296
1297         if (!klass->inited)
1298                 mono_class_init (klass);
1299
1300         return klass->class_size;
1301 }
1302
1303 /*
1304  * Auxiliary routine to mono_class_get_field
1305  *
1306  * Takes a field index instead of a field token.
1307  */
1308 static MonoClassField *
1309 mono_class_get_field_idx (MonoClass *class, int idx)
1310 {
1311         if (class->field.count){
1312                 if ((idx >= class->field.first) && (idx < class->field.last)){
1313                         return &class->fields [idx - class->field.first];
1314                 }
1315         }
1316
1317         if (!class->parent)
1318                 return NULL;
1319
1320         return mono_class_get_field_idx (class->parent, idx);
1321 }
1322
1323 /**
1324  * mono_class_get_field:
1325  * @class: the class to lookup the field.
1326  * @field_token: the field token
1327  *
1328  * Returns: A MonoClassField representing the type and offset of
1329  * the field, or a NULL value if the field does not belong to this
1330  * class.
1331  */
1332 MonoClassField *
1333 mono_class_get_field (MonoClass *class, guint32 field_token)
1334 {
1335         int idx = mono_metadata_token_index (field_token);
1336
1337         g_assert (mono_metadata_token_code (field_token) == MONO_TOKEN_FIELD_DEF);
1338
1339         return mono_class_get_field_idx (class, idx - 1);
1340 }
1341
1342 MonoClassField *
1343 mono_class_get_field_from_name (MonoClass *klass, const char *name)
1344 {
1345         int i;
1346
1347         for (i = 0; i < klass->field.count; ++i) {
1348                 if (strcmp (name, klass->fields [i].name) == 0)
1349                         return &klass->fields [i];
1350         }
1351         return NULL;
1352 }
1353
1354 /**
1355  * mono_class_get:
1356  * @image: the image where the class resides
1357  * @type_token: the token for the class
1358  * @at: an optional pointer to return the array element type
1359  *
1360  * Returns: the MonoClass that represents @type_token in @image
1361  */
1362 MonoClass *
1363 mono_class_get (MonoImage *image, guint32 type_token)
1364 {
1365         MonoClass *class;
1366
1367         switch (type_token & 0xff000000){
1368         case MONO_TOKEN_TYPE_DEF:
1369                 class = mono_class_create_from_typedef (image, type_token);
1370                 break;
1371         case MONO_TOKEN_TYPE_REF:
1372                 class = mono_class_from_typeref (image, type_token);
1373                 break;
1374         case MONO_TOKEN_TYPE_SPEC:
1375                 class = mono_class_create_from_typespec (image, type_token);
1376                 break;
1377         default:
1378                 g_warning ("unknown token type %x", type_token & 0xff000000);
1379                 g_assert_not_reached ();
1380         }
1381
1382         if (!class)
1383                 g_warning ("Could not load class from token 0x%08x in %s", type_token, image->name);
1384         return class;
1385 }
1386
1387 MonoClass *
1388 mono_class_from_name_case (MonoImage *image, const char* name_space, const char *name)
1389 {
1390         MonoTableInfo  *t = &image->tables [MONO_TABLE_TYPEDEF];
1391         guint32 cols [MONO_TYPEDEF_SIZE];
1392         const char *n;
1393         const char *nspace;
1394         guint32 i, visib;
1395
1396         /* add a cache if needed */
1397         for (i = 1; i <= t->rows; ++i) {
1398                 mono_metadata_decode_row (t, i - 1, cols, MONO_TYPEDEF_SIZE);
1399                 /* nested types are accessed from the nesting name */
1400                 visib = cols [MONO_TYPEDEF_FLAGS] & TYPE_ATTRIBUTE_VISIBILITY_MASK;
1401                 if (visib > TYPE_ATTRIBUTE_PUBLIC && visib < TYPE_ATTRIBUTE_NESTED_ASSEMBLY)
1402                         continue;
1403                 n = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
1404                 nspace = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);
1405                 if (g_strcasecmp (n, name) == 0 && g_strcasecmp (nspace, name_space) == 0)
1406                         return mono_class_get (image, MONO_TOKEN_TYPE_DEF | i);
1407         }
1408         return NULL;
1409 }
1410
1411 MonoClass *
1412 mono_class_from_name (MonoImage *image, const char* name_space, const char *name)
1413 {
1414         GHashTable *nspace_table;
1415         guint32 token;
1416
1417         nspace_table = g_hash_table_lookup (image->name_cache, name_space);
1418         if (!nspace_table)
1419                 return 0;
1420         token = GPOINTER_TO_UINT (g_hash_table_lookup (nspace_table, name));
1421
1422         if (!token) {
1423                 /*g_warning ("token not found for %s.%s in image %s", name_space, name, image->name);*/
1424                 return NULL;
1425         }
1426
1427         token = MONO_TOKEN_TYPE_DEF | token;
1428
1429         return mono_class_get (image, token);
1430 }
1431
1432 /**
1433  * mono_array_element_size:
1434  * @ac: pointer to a #MonoArrayClass
1435  *
1436  * Returns: the size of single array element.
1437  */
1438 gint32
1439 mono_array_element_size (MonoClass *ac)
1440 {
1441         if (ac->element_class->valuetype)
1442                 return mono_class_instance_size (ac->element_class) - sizeof (MonoObject);
1443         else
1444                 return sizeof (gpointer);
1445 }
1446
1447 gpointer
1448 mono_ldtoken (MonoImage *image, guint32 token, MonoClass **handle_class)
1449 {
1450         switch (token & 0xff000000) {
1451         case MONO_TOKEN_TYPE_DEF:
1452         case MONO_TOKEN_TYPE_REF: {
1453                 MonoClass *class;
1454                 if (handle_class)
1455                         *handle_class = mono_defaults.typehandle_class;
1456                 class = mono_class_get (image, token);
1457                 mono_class_init (class);
1458                 /* We return a MonoType* as handle */
1459                 return &class->byval_arg;
1460         }
1461         case MONO_TOKEN_TYPE_SPEC: {
1462                 MonoClass *class;
1463                 if (handle_class)
1464                         *handle_class = mono_defaults.typehandle_class;
1465                 class = mono_class_create_from_typespec (image, token);
1466                 mono_class_init (class);
1467                 return &class->byval_arg;
1468         }
1469         case MONO_TOKEN_FIELD_DEF: {
1470                 MonoClass *class;
1471                 guint32 type = mono_metadata_typedef_from_field (image, mono_metadata_token_index (token));
1472                 class = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
1473                 mono_class_init (class);
1474                 if (handle_class)
1475                                 *handle_class = mono_class_from_name (mono_defaults.corlib, "System", "RuntimeFieldHandle");
1476                 return mono_class_get_field (class, token);
1477         }
1478         case MONO_TOKEN_METHOD_DEF:
1479         case MONO_TOKEN_MEMBER_REF:
1480         default:
1481                 g_warning ("Unknown token 0x%08x in ldtoken", token);
1482                 break;
1483         }
1484         return NULL;
1485 }
1486