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 #include <mono/os/gc_wrapper.h>
  33
  34 #define CSIZE(x) (sizeof (x) / 4)
  35
  36 MonoStats mono_stats;
  37
  38 gboolean mono_print_vtable = FALSE;
  39
  40 static MonoClass * mono_class_create_from_typedef (MonoImage *image, guint32 type_token);
  41
  42 void (*mono_debugger_class_init_func) (MonoClass *klass) = NULL;
  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->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 MonoMarshalType *
 105 mono_marshal_load_type_info (MonoClass* klass)
 106 {
 107         int i, j, count = 0;
 108         MonoMarshalType *info;
 109         guint32 layout;
 110
 111         g_assert (klass != NULL);
 112
 113         if (klass->marshal_info)
 114                 return klass->marshal_info;
 115
 116         if (!klass->inited)
 117                 mono_class_init (klass);
 118
 119         for (i = 0; i < klass->field.count; ++i) {
 120                 if (klass->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC)
 121                         continue;
 122                 count++;
 123         }
 124
 125         layout = klass->flags & TYPE_ATTRIBUTE_LAYOUT_MASK;
 126
 127         klass->marshal_info = info = g_malloc0 (sizeof (MonoMarshalType) + sizeof (MonoMarshalField) * count);
 128         info->num_fields = count;
 129
 130         if (klass->parent)
 131                 info->native_size = mono_class_native_size (klass->parent, NULL);
 132
 133         for (j = i = 0; i < klass->field.count; ++i) {
 134                 int size, align;
 135
 136                 if (klass->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC)
 137                         continue;
 138
 139                 if (klass->fields [i].type->attrs & FIELD_ATTRIBUTE_HAS_FIELD_MARSHAL)
 140                         mono_metadata_field_info (klass->image, klass->field.first + i,
 141                                                   NULL, NULL, &info->fields [j].mspec);
 142
 143                 info->fields [j].field = &klass->fields [i];
 144
 145                 switch (layout) {
 146                 case TYPE_ATTRIBUTE_AUTO_LAYOUT:
 147                 case TYPE_ATTRIBUTE_SEQUENTIAL_LAYOUT:
 148                         size = mono_marshal_type_size (klass->fields [i].type, info->fields [j].mspec,
 149                                                        &align, TRUE, klass->unicode);
 150                         align = klass->packing_size ? MIN (klass->packing_size, align): align;
 151                         info->fields [j].offset = info->native_size;
 152                         info->fields [j].offset += align - 1;
 153                         info->fields [j].offset &= ~(align - 1);
 154                         info->native_size = info->fields [j].offset + size;
 155                         break;
 156                 case TYPE_ATTRIBUTE_EXPLICIT_LAYOUT:
 157                         /* FIXME: */
 158                         info->fields [j].offset = klass->fields [i].offset - sizeof (MonoObject);
 159                         info->native_size = klass->instance_size - sizeof (MonoObject);
 160                         break;
 161                 }
 162                 j++;
 163         }
 164
 165         if (info->native_size & (klass->min_align - 1)) {
 166                 info->native_size += klass->min_align - 1;
 167                 info->native_size &= ~(klass->min_align - 1);
 168         }
 169
 170         return klass->marshal_info;
 171 }
 172
 173 /**
 174  * class_compute_field_layout:
 175  * @m: pointer to the metadata.
 176  * @class: The class to initialize
 177  *
 178  * Initializes the class->fields.
 179  *
 180  * Currently we only support AUTO_LAYOUT, and do not even try to do
 181  * a good job at it.  This is temporary to get the code for Paolo.
 182  */
 183 static void
 184 class_compute_field_layout (MonoClass *class)
 185 {
 186         MonoImage *m = class->image;
 187         const int top = class->field.count;
 188         guint32 layout = class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK;
 189         MonoTableInfo *t = &m->tables [MONO_TABLE_FIELD];
 190         int i, blittable = TRUE;
 191         guint32 rva;
 192         guint32 packing_size = 0;
 193
 194         if (class->size_inited)
 195                 return;
 196
 197         if (class->parent) {
 198                 if (!class->parent->size_inited)
 199                         class_compute_field_layout (class->parent);
 200                 class->instance_size += class->parent->instance_size;
 201                 class->min_align = class->parent->min_align;
 202         } else {
 203                 class->instance_size = sizeof (MonoObject);
 204                 class->min_align = 1;
 205         }
 206
 207         if (mono_metadata_packing_from_typedef (class->image, class->type_token, &packing_size, &class->instance_size)) {
 208                 class->instance_size += sizeof (MonoObject);
 209         }
 210
 211         g_assert ((packing_size & 0xfffffff0) == 0);
 212         class->packing_size = packing_size;
 213
 214         if (!top) {
 215                 class->size_inited = 1;
 216                 return;
 217         }
 218
 219         class->fields = g_new0 (MonoClassField, top);
 220
 221         /*
 222          * Fetch all the field information.
 223          */
 224         for (i = 0; i < top; i++){
 225                 const char *sig;
 226                 guint32 cols [MONO_FIELD_SIZE];
 227                 int idx = class->field.first + i;
 228
 229                 mono_metadata_decode_row (t, idx, cols, CSIZE (cols));
 230                 /* The name is needed for fieldrefs */
 231                 class->fields [i].name = mono_metadata_string_heap (m, cols [MONO_FIELD_NAME]);
 232                 sig = mono_metadata_blob_heap (m, cols [MONO_FIELD_SIGNATURE]);
 233                 mono_metadata_decode_value (sig, &sig);
 234                 /* FIELD signature == 0x06 */
 235                 g_assert (*sig == 0x06);
 236                 class->fields [i].type = mono_metadata_parse_field_type (
 237                         m, cols [MONO_FIELD_FLAGS], sig + 1, &sig);
 238
 239                 class->fields [i].parent = class;
 240
 241                 if (!(class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC)) {
 242                         if (class->fields [i].type->byref) {
 243                                 blittable = FALSE;
 244                         } else {
 245                                 MonoClass *field_class = mono_class_from_mono_type (class->fields [i].type);
 246                                 if (!field_class->blittable)
 247                                         blittable = FALSE;
 248                         }
 249                 }
 250                 if (layout == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT) {
 251                         mono_metadata_field_info (m, idx, &class->fields [i].offset, NULL, NULL);
 252                         if (class->fields [i].offset == (guint32)-1)
 253                                 g_warning ("%s not initialized correctly (missing field layout info for %s)", class->name, class->fields [i].name);
 254                 }
 255
 256                 if (cols [MONO_FIELD_FLAGS] & FIELD_ATTRIBUTE_HAS_FIELD_RVA) {
 257                         mono_metadata_field_info (m, idx, NULL, &rva, NULL);
 258                         if (!rva)
 259                                 g_warning ("field %s in %s should have RVA data, but hasn't", class->fields [i].name, class->name);
 260                         class->fields [i].data = mono_cli_rva_map (class->image->image_info, rva);
 261                 }
 262
 263                 if (class->enumtype && !(cols [MONO_FIELD_FLAGS] & FIELD_ATTRIBUTE_STATIC)) {
 264                         class->enum_basetype = class->fields [i].type;
 265                         class->cast_class = class->element_class = mono_class_from_mono_type (class->enum_basetype);
 266                         blittable = class->element_class->blittable;
 267                 }
 268         }
 269
 270         if (class == mono_defaults.string_class)
 271                 blittable = FALSE;
 272
 273         class->blittable = blittable;
 274
 275         if (class->enumtype && !class->enum_basetype) {
 276                 if (!((strcmp (class->name, "Enum") == 0) && (strcmp (class->name_space, "System") == 0)))
 277                         G_BREAKPOINT ();
 278         }
 279         mono_class_layout_fields (class);
 280 }
 281
 282 void
 283 mono_class_layout_fields (MonoClass *class)
 284 {
 285         int i;
 286         const int top = class->field.count;
 287         guint32 layout = class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK;
 288
 289         /*
 290          * Compute field layout and total size (not considering static fields)
 291          */
 292         switch (layout) {
 293         case TYPE_ATTRIBUTE_AUTO_LAYOUT:
 294         case TYPE_ATTRIBUTE_SEQUENTIAL_LAYOUT:
 295                 for (i = 0; i < top; i++){
 296                         int size, align;
 297
 298                         if (class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC)
 299                                 continue;
 300
 301                         size = mono_type_size (class->fields [i].type, &align);
 302
 303                         /* FIXME (LAMESPEC): should we also change the min alignment according to pack? */
 304                         align = class->packing_size ? MIN (class->packing_size, align): align;
 305                         class->min_align = MAX (align, class->min_align);
 306                         class->fields [i].offset = class->instance_size;
 307                         class->fields [i].offset += align - 1;
 308                         class->fields [i].offset &= ~(align - 1);
 309                         class->instance_size = class->fields [i].offset + size;
 310
 311                 }
 312
 313                 if (class->instance_size & (class->min_align - 1)) {
 314                         class->instance_size += class->min_align - 1;
 315                         class->instance_size &= ~(class->min_align - 1);
 316                 }
 317                 break;
 318         case TYPE_ATTRIBUTE_EXPLICIT_LAYOUT:
 319                 for (i = 0; i < top; i++) {
 320                         int size, align;
 321
 322                         /*
 323                          * There must be info about all the fields in a type if it
 324                          * uses explicit layout.
 325                          */
 326
 327                         if (class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC)
 328                                 continue;
 329
 330                         size = mono_type_size (class->fields [i].type, &align);
 331
 332                         /*
 333                          * When we get here, class->fields [i].offset is already set by the
 334                          * loader (for either runtime fields or fields loaded from metadata).
 335                          * The offset is from the start of the object: this works for both
 336                          * classes and valuetypes.
 337                          */
 338                         class->fields [i].offset += sizeof (MonoObject);
 339
 340                         /*
 341                          * Calc max size.
 342                          */
 343                         class->instance_size = MAX (class->instance_size, size + class->fields [i].offset);
 344                 }
 345                 break;
 346         }
 347
 348         class->size_inited = 1;
 349
 350         /*
 351          * Compute static field layout and size
 352          */
 353         switch (layout) {
 354         case TYPE_ATTRIBUTE_AUTO_LAYOUT:
 355         case TYPE_ATTRIBUTE_SEQUENTIAL_LAYOUT:
 356                 for (i = 0; i < top; i++){
 357                         int size, align;
 358
 359                         if (!(class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC))
 360                                 continue;
 361
 362                         size = mono_type_size (class->fields [i].type, &align);
 363                         class->fields [i].offset = class->class_size;
 364                         class->fields [i].offset += align - 1;
 365                         class->fields [i].offset &= ~(align - 1);
 366                         class->class_size = class->fields [i].offset + size;
 367
 368                 }
 369                 break;
 370         case TYPE_ATTRIBUTE_EXPLICIT_LAYOUT:
 371                 for (i = 0; i < top; i++){
 372                         int size, align;
 373
 374                         /*
 375                          * There must be info about all the fields in a type if it
 376                          * uses explicit layout.
 377                          */
 378
 379                         if (!(class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC))
 380                                 continue;
 381
 382                         size = mono_type_size (class->fields [i].type, &align);
 383                         class->fields [i].offset = class->class_size;
 384                         class->fields [i].offset += align - 1;
 385                         class->fields [i].offset &= ~(align - 1);
 386                         class->class_size = class->fields [i].offset + size;
 387                 }
 388                 break;
 389         }
 390 }
 391
 392 static void
 393 init_properties (MonoClass *class)
 394 {
 395         guint startm, endm, i, j;
 396         guint32 cols [MONO_PROPERTY_SIZE];
 397         MonoTableInfo *pt = &class->image->tables [MONO_TABLE_PROPERTY];
 398         MonoTableInfo *msemt = &class->image->tables [MONO_TABLE_METHODSEMANTICS];
 399
 400         class->property.first = mono_metadata_properties_from_typedef (class->image, mono_metadata_token_index (class->type_token) - 1, &class->property.last);
 401         class->property.count = class->property.last - class->property.first;
 402
 403         class->properties = g_new0 (MonoProperty, class->property.count);
 404         for (i = class->property.first; i < class->property.last; ++i) {
 405                 mono_metadata_decode_row (pt, i, cols, MONO_PROPERTY_SIZE);
 406                 class->properties [i - class->property.first].attrs = cols [MONO_PROPERTY_FLAGS];
 407                 class->properties [i - class->property.first].name = mono_metadata_string_heap (class->image, cols [MONO_PROPERTY_NAME]);
 408
 409                 startm = mono_metadata_methods_from_property (class->image, i, &endm);
 410                 for (j = startm; j < endm; ++j) {
 411                         mono_metadata_decode_row (msemt, j, cols, MONO_METHOD_SEMA_SIZE);
 412                         switch (cols [MONO_METHOD_SEMA_SEMANTICS]) {
 413                         case METHOD_SEMANTIC_SETTER:
 414                                 class->properties [i - class->property.first].set = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 415                                 break;
 416                         case METHOD_SEMANTIC_GETTER:
 417                                 class->properties [i - class->property.first].get = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 418                                 break;
 419                         default:
 420                                 break;
 421                         }
 422                 }
 423         }
 424 }
 425
 426 static void
 427 init_events (MonoClass *class)
 428 {
 429         guint startm, endm, i, j;
 430         guint32 cols [MONO_EVENT_SIZE];
 431         MonoTableInfo *pt = &class->image->tables [MONO_TABLE_EVENT];
 432         MonoTableInfo *msemt = &class->image->tables [MONO_TABLE_METHODSEMANTICS];
 433
 434         class->event.first = mono_metadata_events_from_typedef (class->image, mono_metadata_token_index (class->type_token) - 1, &class->event.last);
 435         class->event.count = class->event.last - class->event.first;
 436
 437         class->events = g_new0 (MonoEvent, class->event.count);
 438         for (i = class->event.first; i < class->event.last; ++i) {
 439                 mono_metadata_decode_row (pt, i, cols, MONO_EVENT_SIZE);
 440                 class->events [i - class->event.first].attrs = cols [MONO_EVENT_FLAGS];
 441                 class->events [i - class->event.first].name = mono_metadata_string_heap (class->image, cols [MONO_EVENT_NAME]);
 442
 443                 startm = mono_metadata_methods_from_event (class->image, i, &endm);
 444                 for (j = startm; j < endm; ++j) {
 445                         mono_metadata_decode_row (msemt, j, cols, MONO_METHOD_SEMA_SIZE);
 446                         switch (cols [MONO_METHOD_SEMA_SEMANTICS]) {
 447                         case METHOD_SEMANTIC_ADD_ON:
 448                                 class->events [i - class->event.first].add = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 449                                 break;
 450                         case METHOD_SEMANTIC_REMOVE_ON:
 451                                 class->events [i - class->event.first].remove = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 452                                 break;
 453                         case METHOD_SEMANTIC_FIRE:
 454                                 class->events [i - class->event.first].raise = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 455                                 break;
 456                         case METHOD_SEMANTIC_OTHER: /* don't care for now */
 457                         default:
 458                                 break;
 459                         }
 460                 }
 461         }
 462 }
 463
 464 static guint
 465 mono_get_unique_iid (MonoClass *class)
 466 {
 467         static GHashTable *iid_hash = NULL;
 468         static guint iid = 0;
 469
 470         char *str;
 471         gpointer value;
 472
 473         g_assert (class->flags & TYPE_ATTRIBUTE_INTERFACE);
 474
 475         if (!iid_hash)
 476                 iid_hash = g_hash_table_new (g_str_hash, g_str_equal);
 477
 478         str = g_strdup_printf ("%s|%s.%s\n", class->image->name, class->name_space, class->name);
 479
 480         if (g_hash_table_lookup_extended (iid_hash, str, NULL, &value)) {
 481                 g_free (str);
 482                 return (guint)value;
 483         } else {
 484                 g_hash_table_insert (iid_hash, str, (gpointer)iid);
 485                 ++iid;
 486         }
 487
 488         return iid - 1;
 489 }
 490
 491 static int
 492 setup_interface_offsets (MonoClass *class, int cur_slot)
 493 {
 494         MonoClass *k, *ic;
 495         int i, max_iid;
 496
 497         /* compute maximum number of slots and maximum interface id */
 498         max_iid = 0;
 499         for (k = class; k ; k = k->parent) {
 500                 for (i = 0; i < k->interface_count; i++) {
 501                         ic = k->interfaces [i];
 502
 503                         if (!ic->inited)
 504                                 mono_class_init (ic);
 505
 506                         if (max_iid < ic->interface_id)
 507                                 max_iid = ic->interface_id;
 508                 }
 509         }
 510
 511         if (class->flags & TYPE_ATTRIBUTE_INTERFACE) {
 512                 if (max_iid < class->interface_id)
 513                         max_iid = class->interface_id;
 514         }
 515         class->max_interface_id = max_iid;
 516         /* compute vtable offset for interfaces */
 517         class->interface_offsets = g_malloc (sizeof (gpointer) * (max_iid + 1));
 518
 519         for (i = 0; i <= max_iid; i++)
 520                 class->interface_offsets [i] = -1;
 521
 522         for (i = 0; i < class->interface_count; i++) {
 523                 ic = class->interfaces [i];
 524                 class->interface_offsets [ic->interface_id] = cur_slot;
 525                 cur_slot += ic->method.count;
 526         }
 527
 528         for (k = class->parent; k ; k = k->parent) {
 529                 for (i = 0; i < k->interface_count; i++) {
 530                         ic = k->interfaces [i];
 531                         if (class->interface_offsets [ic->interface_id] == -1) {
 532                                 int io = k->interface_offsets [ic->interface_id];
 533
 534                                 g_assert (io >= 0);
 535
 536                                 class->interface_offsets [ic->interface_id] = io;
 537                         }
 538                 }
 539         }
 540         return cur_slot;
 541 }
 542
 543 void
 544 mono_class_setup_vtable (MonoClass *class, MonoMethod **overrides, int onum)
 545 {
 546         MonoClass *k, *ic;
 547         MonoMethod **vtable;
 548         int i, ms, max_vtsize = 0, max_iid, cur_slot = 0;
 549
 550         /* setup_vtable() must be called only once on the type */
 551         if (class->interface_offsets) {
 552                 g_warning ("vtable already computed in %s.%s", class->name_space, class->name);
 553                 return;
 554         }
 555
 556         for (i = 0; i < class->interface_count; i++)
 557                 max_vtsize += class->interfaces [i]->method.count;
 558
 559         if (class->parent) {
 560                 max_vtsize += class->parent->vtable_size;
 561                 cur_slot = class->parent->vtable_size;
 562         }
 563
 564         max_vtsize += class->method.count;
 565
 566         vtable = alloca (sizeof (gpointer) * max_vtsize);
 567         memset (vtable, 0, sizeof (gpointer) * max_vtsize);
 568
 569         /* printf ("METAINIT %s.%s\n", class->name_space, class->name); */
 570
 571         cur_slot = setup_interface_offsets (class, cur_slot);
 572         max_iid = class->max_interface_id;
 573
 574         if (class->parent && class->parent->vtable_size)
 575                 memcpy (vtable, class->parent->vtable,  sizeof (gpointer) * class->parent->vtable_size);
 576
 577         /* override interface methods */
 578         for (i = 0; i < onum; i++) {
 579                 MonoMethod *decl = overrides [i*2];
 580                 if (decl->klass->flags & TYPE_ATTRIBUTE_INTERFACE) {
 581                         int dslot;
 582                         g_assert (decl->slot != -1);
 583                         dslot = decl->slot + class->interface_offsets [decl->klass->interface_id];
 584                         vtable [dslot] = overrides [i*2 + 1];
 585                 }
 586         }
 587
 588         for (k = class; k ; k = k->parent) {
 589                 class->idepth++;
 590                 for (i = 0; i < k->interface_count; i++) {
 591                         int j, l, io;
 592
 593                         ic = k->interfaces [i];
 594                         io = k->interface_offsets [ic->interface_id];
 595
 596                         g_assert (io >= 0);
 597                         g_assert (io <= max_vtsize);
 598
 599                         if (k == class) {
 600                                 for (l = 0; l < ic->method.count; l++) {
 601                                         MonoMethod *im = ic->methods [l];
 602                                         for (j = 0; j < class->method.count; ++j) {
 603                                                 MonoMethod *cm = class->methods [j];
 604                                                 if (!(cm->flags & METHOD_ATTRIBUTE_VIRTUAL) ||
 605                                                     !(cm->flags & METHOD_ATTRIBUTE_PUBLIC) ||
 606                                                     !(cm->flags & METHOD_ATTRIBUTE_NEW_SLOT))
 607                                                         continue;
 608                                                 if (!strcmp(cm->name, im->name) &&
 609                                                     mono_metadata_signature_equal (cm->signature, im->signature)) {
 610                                                         g_assert (io + l <= max_vtsize);
 611                                                         vtable [io + l] = cm;
 612                                                 }
 613                                         }
 614                                 }
 615                         } else {
 616                                 /* already implemented */
 617                                 if (io >= k->vtable_size)
 618                                         continue;
 619                         }
 620
 621                         for (l = 0; l < ic->method.count; l++) {
 622                                 MonoMethod *im = ic->methods [l];
 623                                 MonoClass *k1;
 624
 625                                 g_assert (io + l <= max_vtsize);
 626
 627                                 if (vtable [io + l] && !(vtable [io + l]->flags & METHOD_ATTRIBUTE_ABSTRACT))
 628                                         continue;
 629
 630                                 for (k1 = class; k1; k1 = k1->parent) {
 631                                         for (j = 0; j < k1->method.count; ++j) {
 632                                                 MonoMethod *cm = k1->methods [j];
 633
 634                                                 if (!(cm->flags & METHOD_ATTRIBUTE_VIRTUAL) ||
 635                                                     !(cm->flags & METHOD_ATTRIBUTE_PUBLIC))
 636                                                         continue;
 637
 638                                                 if (!strcmp(cm->name, im->name) &&
 639                                                     mono_metadata_signature_equal (cm->signature, im->signature)) {
 640                                                         g_assert (io + l <= max_vtsize);
 641                                                         vtable [io + l] = cm;
 642                                                         break;
 643                                                 }
 644
 645                                         }
 646                                         g_assert (io + l <= max_vtsize);
 647                                         if (vtable [io + l] && !(vtable [io + l]->flags & METHOD_ATTRIBUTE_ABSTRACT))
 648                                                 break;
 649                                 }
 650                         }
 651
 652                         for (l = 0; l < ic->method.count; l++) {
 653                                 MonoMethod *im = ic->methods [l];
 654                                 char *qname, *fqname;
 655                                 MonoClass *k1;
 656
 657                                 if (vtable [io + l])
 658                                         continue;
 659
 660                                 qname = g_strconcat (ic->name, ".", im->name, NULL);
 661                                 if (ic->name_space && ic->name_space [0])
 662                                         fqname = g_strconcat (ic->name_space, ".", ic->name, ".", im->name, NULL);
 663                                 else
 664                                         fqname = NULL;
 665
 666                                 for (k1 = class; k1; k1 = k1->parent) {
 667                                         for (j = 0; j < k1->method.count; ++j) {
 668                                                 MonoMethod *cm = k1->methods [j];
 669
 670                                                 if (!(cm->flags & METHOD_ATTRIBUTE_VIRTUAL))
 671                                                         continue;
 672
 673                                                 if (((fqname && !strcmp (cm->name, fqname)) || !strcmp (cm->name, qname)) &&
 674                                                     mono_metadata_signature_equal (cm->signature, im->signature)) {
 675                                                         g_assert (io + l <= max_vtsize);
 676                                                         vtable [io + l] = cm;
 677                                                         break;
 678                                                 }
 679                                         }
 680                                 }
 681                                 g_free (qname);
 682                                 g_free (fqname);
 683                         }
 684
 685
 686                         if (!(class->flags & TYPE_ATTRIBUTE_ABSTRACT)) {
 687                                 for (l = 0; l < ic->method.count; l++) {
 688                                         char *msig;
 689                                         MonoMethod *im = ic->methods [l];
 690                                         if (im->flags & METHOD_ATTRIBUTE_STATIC)
 691                                                         continue;
 692                                         g_assert (io + l <= max_vtsize);
 693                                         if (!(vtable [io + l])) {
 694                                                 for (j = 0; j < onum; ++j) {
 695                                                         g_print (" at slot %d: %s (%d) overrides %s (%d)\n", io+l, overrides [j*2+1]->name,
 696                                                                  overrides [j*2+1]->slot, overrides [j*2]->name, overrides [j*2]->slot);
 697                                                 }
 698                                                 msig = mono_signature_get_desc (im->signature, FALSE);
 699                                                 printf ("no implementation for interface method %s.%s::%s(%s) in class %s.%s\n",
 700                                                         ic->name_space, ic->name, im->name, msig, class->name_space, class->name);
 701                                                 g_free (msig);
 702                                                 for (j = 0; j < class->method.count; ++j) {
 703                                                         MonoMethod *cm = class->methods [j];
 704                                                         msig = mono_signature_get_desc (cm->signature, FALSE);
 705
 706                                                         printf ("METHOD %s(%s)\n", cm->name, msig);
 707                                                         g_free (msig);
 708                                                 }
 709                                                 g_assert_not_reached ();
 710                                         }
 711                                 }
 712                         }
 713
 714                         for (l = 0; l < ic->method.count; l++) {
 715                                 MonoMethod *im = vtable [io + l];
 716
 717                                 if (im) {
 718                                         g_assert (io + l <= max_vtsize);
 719                                         if (im->slot < 0) {
 720                                                 /* FIXME: why do we need this ? */
 721                                                 im->slot = io + l;
 722                                                 /* g_assert_not_reached (); */
 723                                         }
 724                                 }
 725                         }
 726                 }
 727         }
 728
 729         for (i = 0; i < class->method.count; ++i) {
 730                 MonoMethod *cm;
 731
 732                 cm = class->methods [i];
 733
 734                 if (!(cm->flags & METHOD_ATTRIBUTE_NEW_SLOT) && (cm->flags & METHOD_ATTRIBUTE_VIRTUAL)) {
 735                         int slot = -1;
 736                         for (k = class->parent; k ; k = k->parent) {
 737                                 int j;
 738                                 for (j = 0; j < k->method.count; ++j) {
 739                                         MonoMethod *m1 = k->methods [j];
 740                                         if (!(m1->flags & METHOD_ATTRIBUTE_VIRTUAL))
 741                                                 continue;
 742                                         if (!strcmp(cm->name, m1->name) &&
 743                                             mono_metadata_signature_equal (cm->signature, m1->signature)) {
 744                                                 slot = k->methods [j]->slot;
 745                                                 g_assert (cm->slot < max_vtsize);
 746                                                 break;
 747                                         }
 748                                 }
 749                                 if (slot >= 0)
 750                                         break;
 751                         }
 752                         if (slot >= 0)
 753                                 cm->slot = slot;
 754                 }
 755
 756                 if (cm->slot < 0)
 757                         cm->slot = cur_slot++;
 758
 759                 if (!(cm->flags & METHOD_ATTRIBUTE_ABSTRACT))
 760                         vtable [cm->slot] = cm;
 761         }
 762
 763         /* override non interface methods */
 764         for (i = 0; i < onum; i++) {
 765                 MonoMethod *decl = overrides [i*2];
 766                 if (!(decl->klass->flags & TYPE_ATTRIBUTE_INTERFACE)) {
 767                         g_assert (decl->slot != -1);
 768                         vtable [decl->slot] = overrides [i*2 + 1];
 769                         overrides [i * 2 + 1]->slot = decl->slot;
 770                 }
 771         }
 772
 773         class->vtable_size = cur_slot;
 774         class->vtable = g_malloc0 (sizeof (gpointer) * class->vtable_size);
 775         memcpy (class->vtable, vtable,  sizeof (gpointer) * class->vtable_size);
 776
 777         ms = MAX (MONO_DEFAULT_SUPERTABLE_SIZE, class->idepth);
 778         class->supertypes = g_new0 (MonoClass *, ms);
 779
 780         if (class->parent) {
 781                 for (i = class->idepth, k = class; k ; k = k->parent)
 782                         class->supertypes [--i] = k;
 783         } else {
 784                 class->supertypes [0] = class;
 785         }
 786
 787         if (mono_print_vtable) {
 788                 int icount = 0;
 789
 790                 for (i = 0; i <= max_iid; i++)
 791                         if (class->interface_offsets [i] != -1)
 792                                 icount++;
 793
 794                 printf ("VTable %s.%s (size = %d, interfaces = %d)\n", class->name_space,
 795                         class->name, class->vtable_size, icount);
 796
 797                 for (i = 0; i < class->vtable_size; ++i) {
 798                         MonoMethod *cm;
 799
 800                         cm = vtable [i];
 801                         if (cm) {
 802                                 printf ("  slot %03d(%03d) %s.%s:%s\n", i, cm->slot,
 803                                         cm->klass->name_space, cm->klass->name,
 804                                         cm->name);
 805                         }
 806                 }
 807
 808
 809                 if (icount) {
 810                         printf ("Interfaces %s.%s (max_iid = %d)\n", class->name_space,
 811                                 class->name, max_iid);
 812
 813                         for (i = 0; i < class->interface_count; i++) {
 814                                 ic = class->interfaces [i];
 815                                 printf ("  slot %03d(%03d) %s.%s\n",
 816                                         class->interface_offsets [ic->interface_id],
 817                                         ic->method.count, ic->name_space, ic->name);
 818                         }
 819
 820                         for (k = class->parent; k ; k = k->parent) {
 821                                 for (i = 0; i < k->interface_count; i++) {
 822                                         ic = k->interfaces [i];
 823                                         printf ("  slot %03d(%03d) %s.%s\n",
 824                                                 class->interface_offsets [ic->interface_id],
 825                                                 ic->method.count, ic->name_space, ic->name);
 826                                 }
 827                         }
 828                 }
 829         }
 830
 831 }
 832
 833 /**
 834  * mono_class_init:
 835  * @class: the class to initialize
 836  *
 837  * compute the instance_size, class_size and other infos that cannot be
 838  * computed at mono_class_get() time. Also compute a generic vtable and
 839  * the method slot numbers. We use this infos later to create a domain
 840  * specific vtable.
 841  */
 842 void
 843 mono_class_init (MonoClass *class)
 844 {
 845         int i;
 846         static MonoMethod *default_ghc = NULL;
 847         static MonoMethod *default_finalize = NULL;
 848         static int finalize_slot = -1;
 849         static int ghc_slot = -1;
 850         MonoMethod **overrides;
 851         int onum = 0;
 852
 853         g_assert (class);
 854
 855         if (class->inited)
 856                 return;
 857
 858         if (class->init_pending) {
 859                 /* this indicates a cyclic dependency */
 860                 g_error ("pending init %s.%s\n", class->name_space, class->name);
 861         }
 862
 863         class->init_pending = 1;
 864
 865         mono_stats.initialized_class_count++;
 866
 867         if (class->parent && !class->parent->inited)
 868                 mono_class_init (class->parent);
 869
 870         /*
 871          * Computes the size used by the fields, and their locations
 872          */
 873         if (!class->size_inited)
 874                 class_compute_field_layout (class);
 875
 876         /* initialize method pointers */
 877         class->methods = g_new (MonoMethod*, class->method.count);
 878         for (i = 0; i < class->method.count; ++i)
 879                 class->methods [i] = mono_get_method (class->image,
 880                         MONO_TOKEN_METHOD_DEF | (i + class->method.first + 1), class);
 881
 882         init_properties (class);
 883         init_events (class);
 884
 885         i = mono_metadata_nesting_typedef (class->image, class->type_token);
 886         while (i) {
 887                 MonoClass* nclass;
 888                 guint32 cols [MONO_NESTED_CLASS_SIZE];
 889                 mono_metadata_decode_row (&class->image->tables [MONO_TABLE_NESTEDCLASS], i - 1, cols, MONO_NESTED_CLASS_SIZE);
 890                 if (cols [MONO_NESTED_CLASS_ENCLOSING] != mono_metadata_token_index (class->type_token))
 891                         break;
 892                 nclass = mono_class_create_from_typedef (class->image, MONO_TOKEN_TYPE_DEF | cols [MONO_NESTED_CLASS_NESTED]);
 893                 class->nested_classes = g_list_prepend (class->nested_classes, nclass);
 894                 ++i;
 895         }
 896
 897         if (class->flags & TYPE_ATTRIBUTE_INTERFACE) {
 898                 for (i = 0; i < class->method.count; ++i)
 899                         class->methods [i]->slot = i;
 900                 class->init_pending = 0;
 901                 class->inited = 1;
 902                 /*
 903                  * class->interface_offsets is needed for the castclass/isinst code, so
 904                  * we have to setup them for interfaces, too.
 905                  */
 906                 setup_interface_offsets (class, 0);
 907                 return;
 908         }
 909
 910         overrides = mono_class_get_overrides (class->image, class->type_token, &onum);
 911         mono_class_setup_vtable (class, overrides, onum);
 912         g_free (overrides);
 913
 914         class->inited = 1;
 915         class->init_pending = 0;
 916
 917         if (!default_ghc) {
 918                 if (class == mono_defaults.object_class) {
 919
 920                         for (i = 0; i < class->vtable_size; ++i) {
 921                                 MonoMethod *cm = class->vtable [i];
 922
 923                                 if (!strcmp (cm->name, "GetHashCode")) {
 924                                         ghc_slot = i;
 925                                         break;
 926                                 }
 927                         }
 928
 929                         g_assert (ghc_slot > 0);
 930
 931                         default_ghc = class->vtable [ghc_slot];
 932                 }
 933         }
 934
 935         class->ghcimpl = 1;
 936         if (class->parent) {
 937
 938                 if (class->vtable [ghc_slot] == default_ghc) {
 939                         class->ghcimpl = 0;
 940                 }
 941         }
 942
 943         if (!default_finalize) {
 944                 if (class == mono_defaults.object_class) {
 945
 946                         for (i = 0; i < class->vtable_size; ++i) {
 947                                 MonoMethod *cm = class->vtable [i];
 948
 949                                 if (!strcmp (cm->name, "Finalize")) {
 950                                         finalize_slot = i;
 951                                         break;
 952                                 }
 953                         }
 954
 955                         g_assert (finalize_slot > 0);
 956
 957                         default_finalize = class->vtable [finalize_slot];
 958                 }
 959         }
 960
 961         /* Object::Finalize should have empty implemenatation */
 962         class->has_finalize = 0;
 963         if (class->parent) {
 964                 if (class->vtable [finalize_slot] != default_finalize)
 965                         class->has_finalize = 1;
 966         }
 967
 968         if (mono_debugger_class_init_func)
 969                 mono_debugger_class_init_func (class);
 970 }
 971
 972
 973 /*
 974  * Compute a relative numbering of the class hierarchy as described in
 975  * "Java for Large-Scale Scientific Computations?"
 976  */
 977 static void
 978 mono_compute_relative_numbering (MonoClass *class, int *c)
 979 {
 980         GList *s;
 981
 982         (*c)++;
 983
 984         class->baseval = *c;
 985
 986         for (s = class->subclasses; s; s = s->next)
 987                 mono_compute_relative_numbering ((MonoClass *)s->data, c);
 988
 989         class->diffval = *c -  class->baseval;
 990 }
 991
 992 void
 993 mono_class_setup_mono_type (MonoClass *class)
 994 {
 995         const char *name = class->name;
 996         const char *nspace = class->name_space;
 997
 998         if (class->flags & TYPE_ATTRIBUTE_INTERFACE)
 999                 class->interface_id = mono_get_unique_iid (class);
1000
1001         class->this_arg.byref = 1;
1002         class->this_arg.data.klass = class;
1003         class->this_arg.type = MONO_TYPE_CLASS;
1004         class->byval_arg.data.klass = class;
1005         class->byval_arg.type = MONO_TYPE_CLASS;
1006
1007         if (!strcmp (nspace, "System")) {
1008                 if (!strcmp (name, "ValueType")) {
1009                         /*
1010                          * do not set the valuetype bit for System.ValueType.
1011                          * class->valuetype = 1;
1012                          */
1013                 } else if (!strcmp (name, "Enum")) {
1014                         /*
1015                          * do not set the valuetype bit for System.Enum.
1016                          * class->valuetype = 1;
1017                          */
1018                         class->valuetype = 0;
1019                         class->enumtype = 0;
1020                 } else if (!strcmp (name, "Object")) {
1021                         class->this_arg.type = class->byval_arg.type = MONO_TYPE_OBJECT;
1022                 } else if (!strcmp (name, "String")) {
1023                         class->this_arg.type = class->byval_arg.type = MONO_TYPE_STRING;
1024                 } else if (!strcmp (name, "TypedReference")) {
1025                         class->this_arg.type = class->byval_arg.type = MONO_TYPE_TYPEDBYREF;
1026                 }
1027         }
1028
1029         if (class->valuetype) {
1030                 int t = MONO_TYPE_VALUETYPE;
1031                 if (!strcmp (nspace, "System")) {
1032                         switch (*name) {
1033                         case 'B':
1034                                 if (!strcmp (name, "Boolean")) {
1035                                         t = MONO_TYPE_BOOLEAN;
1036                                 } else if (!strcmp(name, "Byte")) {
1037                                         t = MONO_TYPE_U1;
1038                                         class->blittable = TRUE;
1039                                 }
1040                                 break;
1041                         case 'C':
1042                                 if (!strcmp (name, "Char")) {
1043                                         t = MONO_TYPE_CHAR;
1044                                 }
1045                                 break;
1046                         case 'D':
1047                                 if (!strcmp (name, "Double")) {
1048                                         t = MONO_TYPE_R8;
1049                                         class->blittable = TRUE;
1050                                 }
1051                                 break;
1052                         case 'I':
1053                                 if (!strcmp (name, "Int32")) {
1054                                         t = MONO_TYPE_I4;
1055                                         class->blittable = TRUE;
1056                                 } else if (!strcmp(name, "Int16")) {
1057                                         t = MONO_TYPE_I2;
1058                                         class->blittable = TRUE;
1059                                 } else if (!strcmp(name, "Int64")) {
1060                                         t = MONO_TYPE_I8;
1061                                         class->blittable = TRUE;
1062                                 } else if (!strcmp(name, "IntPtr")) {
1063                                         t = MONO_TYPE_I;
1064                                         class->blittable = TRUE;
1065                                 }
1066                                 break;
1067                         case 'S':
1068                                 if (!strcmp (name, "Single")) {
1069                                         t = MONO_TYPE_R4;
1070                                         class->blittable = TRUE;
1071                                 } else if (!strcmp(name, "SByte")) {
1072                                         t = MONO_TYPE_I1;
1073                                         class->blittable = TRUE;
1074                                 }
1075                                 break;
1076                         case 'U':
1077                                 if (!strcmp (name, "UInt32")) {
1078                                         t = MONO_TYPE_U4;
1079                                         class->blittable = TRUE;
1080                                 } else if (!strcmp(name, "UInt16")) {
1081                                         t = MONO_TYPE_U2;
1082                                         class->blittable = TRUE;
1083                                 } else if (!strcmp(name, "UInt64")) {
1084                                         t = MONO_TYPE_U8;
1085                                         class->blittable = TRUE;
1086                                 } else if (!strcmp(name, "UIntPtr")) {
1087                                         t = MONO_TYPE_U;
1088                                         class->blittable = TRUE;
1089                                 }
1090                                 break;
1091                         case 'V':
1092                                 if (!strcmp (name, "Void")) {
1093                                         t = MONO_TYPE_VOID;
1094                                 }
1095                                 break;
1096                         default:
1097                                 break;
1098                         }
1099                 }
1100                 class->this_arg.type = class->byval_arg.type = t;
1101         }
1102 }
1103
1104 void
1105 mono_class_setup_parent (MonoClass *class, MonoClass *parent)
1106 {
1107         gboolean system_namespace;
1108
1109         system_namespace = !strcmp (class->name_space, "System");
1110
1111         /* if root of the hierarchy */
1112         if (system_namespace && !strcmp (class->name, "Object")) {
1113                 class->parent = NULL;
1114                 class->instance_size = sizeof (MonoObject);
1115                 return;
1116         }
1117         if (!strcmp (class->name, "<Module>")) {
1118                 class->parent = NULL;
1119                 class->instance_size = 0;
1120                 return;
1121         }
1122
1123         if (!(class->flags & TYPE_ATTRIBUTE_INTERFACE)) {
1124                 int rnum = 0;
1125                 class->parent = parent;
1126
1127                 if (!parent)
1128                         g_assert_not_reached (); /* FIXME */
1129
1130                 class->marshalbyref = parent->marshalbyref;
1131                 class->contextbound  = parent->contextbound;
1132                 class->delegate  = parent->delegate;
1133
1134                 if (system_namespace) {
1135                         if (*class->name == 'M' && !strcmp (class->name, "MarshalByRefObject"))
1136                                 class->marshalbyref = 1;
1137
1138                         if (*class->name == 'C' && !strcmp (class->name, "ContextBoundObject"))
1139                                 class->contextbound  = 1;
1140
1141                         if (*class->name == 'D' && !strcmp (class->name, "Delegate"))
1142                                 class->delegate  = 1;
1143                 }
1144
1145                 if (class->parent->enumtype || ((strcmp (class->parent->name, "ValueType") == 0) &&
1146                                                 (strcmp (class->parent->name_space, "System") == 0)))
1147                         class->valuetype = 1;
1148                 if (((strcmp (class->parent->name, "Enum") == 0) && (strcmp (class->parent->name_space, "System") == 0))) {
1149                         class->valuetype = class->enumtype = 1;
1150                 }
1151                 /*class->enumtype = class->parent->enumtype; */
1152                 class->parent->subclasses = g_list_prepend (class->parent->subclasses, class);
1153                 mono_compute_relative_numbering (mono_defaults.object_class, &rnum);
1154         } else {
1155                 class->parent = NULL;
1156         }
1157
1158 }
1159
1160 /**
1161  * @image: context where the image is created
1162  * @type_token:  typedef token
1163  */
1164 static MonoClass *
1165 mono_class_create_from_typedef (MonoImage *image, guint32 type_token)
1166 {
1167         MonoTableInfo *tt = &image->tables [MONO_TABLE_TYPEDEF];
1168         MonoClass *class, *parent = NULL;
1169         guint32 cols [MONO_TYPEDEF_SIZE];
1170         guint32 cols_next [MONO_TYPEDEF_SIZE];
1171         guint tidx = mono_metadata_token_index (type_token);
1172         const char *name, *nspace;
1173         guint icount = 0;
1174         MonoClass **interfaces;
1175
1176         if ((class = g_hash_table_lookup (image->class_cache, GUINT_TO_POINTER (type_token))))
1177                 return class;
1178
1179         g_assert (mono_metadata_token_table (type_token) == MONO_TABLE_TYPEDEF);
1180
1181         mono_metadata_decode_row (tt, tidx - 1, cols, MONO_TYPEDEF_SIZE);
1182
1183         name = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
1184         nspace = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);
1185
1186         if (cols [MONO_TYPEDEF_EXTENDS])
1187                 parent = mono_class_get (image, mono_metadata_token_from_dor (cols [MONO_TYPEDEF_EXTENDS]));
1188         interfaces = mono_metadata_interfaces_from_typedef (image, type_token, &icount);
1189
1190         class = g_malloc0 (sizeof (MonoClass));
1191
1192         g_hash_table_insert (image->class_cache, GUINT_TO_POINTER (type_token), class);
1193
1194         class->interfaces = interfaces;
1195         class->interface_count = icount;
1196
1197         class->name = name;
1198         class->name_space = nspace;
1199
1200         class->image = image;
1201         class->type_token = type_token;
1202         class->flags = cols [MONO_TYPEDEF_FLAGS];
1203
1204         if ((class->flags & TYPE_ATTRIBUTE_STRING_FORMAT_MASK) == TYPE_ATTRIBUTE_UNICODE_CLASS)
1205                 class->unicode = 1;
1206         /* fixme: maybe we must set this on windows
1207         if ((class->flags & TYPE_ATTRIBUTE_STRING_FORMAT_MASK) == TYPE_ATTRIBUTE_AUTO_CLASS)
1208                 class->unicode = 1;
1209         */
1210
1211         class->cast_class = class->element_class = class;
1212
1213         /*g_print ("Init class %s\n", name);*/
1214
1215         mono_class_setup_parent (class, parent);
1216
1217         mono_class_setup_mono_type (class);
1218
1219         /*
1220          * Compute the field and method lists
1221          */
1222         class->field.first  = cols [MONO_TYPEDEF_FIELD_LIST] - 1;
1223         class->method.first = cols [MONO_TYPEDEF_METHOD_LIST] - 1;
1224
1225         if (tt->rows > tidx){
1226                 mono_metadata_decode_row (tt, tidx, cols_next, CSIZE (cols_next));
1227                 class->field.last  = cols_next [MONO_TYPEDEF_FIELD_LIST] - 1;
1228                 class->method.last = cols_next [MONO_TYPEDEF_METHOD_LIST] - 1;
1229         } else {
1230                 class->field.last  = image->tables [MONO_TABLE_FIELD].rows;
1231                 class->method.last = image->tables [MONO_TABLE_METHOD].rows;
1232         }
1233
1234         if (cols [MONO_TYPEDEF_FIELD_LIST] &&
1235             cols [MONO_TYPEDEF_FIELD_LIST] <= image->tables [MONO_TABLE_FIELD].rows)
1236                 class->field.count = class->field.last - class->field.first;
1237         else
1238                 class->field.count = 0;
1239
1240         if (cols [MONO_TYPEDEF_METHOD_LIST] <= image->tables [MONO_TABLE_METHOD].rows)
1241                 class->method.count = class->method.last - class->method.first;
1242         else
1243                 class->method.count = 0;
1244
1245         /* reserve space to store vector pointer in arrays */
1246         if (!strcmp (nspace, "System") && !strcmp (name, "Array")) {
1247                 class->instance_size += 2 * sizeof (gpointer);
1248                 g_assert (class->field.count == 0);
1249         }
1250
1251         if (class->enumtype)
1252                 class_compute_field_layout (class);
1253
1254         if ((type_token = mono_metadata_nested_in_typedef (image, type_token)))
1255                 class->nested_in = mono_class_create_from_typedef (image, type_token);
1256
1257         return class;
1258 }
1259
1260 MonoClass *
1261 mono_ptr_class_get (MonoType *type)
1262 {
1263         MonoClass *result;
1264         MonoClass *el_class;
1265         static GHashTable *ptr_hash = NULL;
1266
1267         if (!ptr_hash)
1268                 ptr_hash = g_hash_table_new (g_direct_hash, g_direct_equal);
1269         el_class = mono_class_from_mono_type (type);
1270         if ((result = g_hash_table_lookup (ptr_hash, el_class)))
1271                 return result;
1272         result = g_new0 (MonoClass, 1);
1273
1274         result->parent = NULL; /* no parent for PTR types */
1275         result->name = "System";
1276         result->name_space = "MonoPtrFakeClass";
1277         result->image = el_class->image;
1278         result->inited = TRUE;
1279         result->flags = TYPE_ATTRIBUTE_CLASS | (el_class->flags & TYPE_ATTRIBUTE_VISIBILITY_MASK);
1280         /* Can pointers get boxed? */
1281         result->instance_size = sizeof (gpointer);
1282         /*
1283          * baseval, diffval: need them to allow casting ?
1284          */
1285         result->cast_class = result->element_class = el_class;
1286         result->enum_basetype = &result->element_class->byval_arg;
1287
1288         result->this_arg.type = result->byval_arg.type = MONO_TYPE_PTR;
1289         result->this_arg.data.type = result->byval_arg.data.type = result->enum_basetype;
1290         result->this_arg.byref = TRUE;
1291
1292         g_hash_table_insert (ptr_hash, el_class, result);
1293
1294         return result;
1295 }
1296
1297 MonoClass *
1298 mono_class_from_mono_type (MonoType *type)
1299 {
1300         switch (type->type) {
1301         case MONO_TYPE_OBJECT:
1302                 return mono_defaults.object_class;
1303         case MONO_TYPE_VOID:
1304                 return mono_defaults.void_class;
1305         case MONO_TYPE_BOOLEAN:
1306                 return mono_defaults.boolean_class;
1307         case MONO_TYPE_CHAR:
1308                 return mono_defaults.char_class;
1309         case MONO_TYPE_I1:
1310                 return mono_defaults.sbyte_class;
1311         case MONO_TYPE_U1:
1312                 return mono_defaults.byte_class;
1313         case MONO_TYPE_I2:
1314                 return mono_defaults.int16_class;
1315         case MONO_TYPE_U2:
1316                 return mono_defaults.uint16_class;
1317         case MONO_TYPE_I4:
1318                 return mono_defaults.int32_class;
1319         case MONO_TYPE_U4:
1320                 return mono_defaults.uint32_class;
1321         case MONO_TYPE_I:
1322                 return mono_defaults.int_class;
1323         case MONO_TYPE_U:
1324                 return mono_defaults.uint_class;
1325         case MONO_TYPE_I8:
1326                 return mono_defaults.int64_class;
1327         case MONO_TYPE_U8:
1328                 return mono_defaults.uint64_class;
1329         case MONO_TYPE_R4:
1330                 return mono_defaults.single_class;
1331         case MONO_TYPE_R8:
1332                 return mono_defaults.double_class;
1333         case MONO_TYPE_STRING:
1334                 return mono_defaults.string_class;
1335         case MONO_TYPE_TYPEDBYREF:
1336                 return mono_defaults.typed_reference_class;
1337         case MONO_TYPE_ARRAY:
1338                 return mono_array_class_get (type->data.array->type, type->data.array->rank);
1339         case MONO_TYPE_PTR:
1340                 return mono_ptr_class_get (type->data.type);
1341         case MONO_TYPE_SZARRAY:
1342                 return mono_array_class_get (type->data.type, 1);
1343         case MONO_TYPE_CLASS:
1344         case MONO_TYPE_VALUETYPE:
1345                 return type->data.klass;
1346         default:
1347                 g_warning ("implement me %02x\n", type->type);
1348                 g_assert_not_reached ();
1349         }
1350
1351         return NULL;
1352 }
1353
1354 /**
1355  * @image: context where the image is created
1356  * @type_spec:  typespec token
1357  */
1358 static MonoClass *
1359 mono_class_create_from_typespec (MonoImage *image, guint32 type_spec)
1360 {
1361         MonoType *type;
1362         MonoClass *class;
1363
1364         type = mono_type_create_from_typespec (image, type_spec);
1365
1366         switch (type->type) {
1367         case MONO_TYPE_ARRAY:
1368                 class = mono_array_class_get (type->data.array->type, type->data.array->rank);
1369                 break;
1370         case MONO_TYPE_SZARRAY:
1371                 class = mono_array_class_get (type->data.type, 1);
1372                 break;
1373         case MONO_TYPE_PTR:
1374                 class = mono_class_from_mono_type (type->data.type);
1375                 break;
1376         default:
1377                 /* it seems any type can be stored in TypeSpec as well */
1378                 class = mono_class_from_mono_type (type);
1379                 break;
1380         }
1381
1382         mono_metadata_free_type (type);
1383
1384         return class;
1385 }
1386
1387 /**
1388  * mono_array_class_get:
1389  * @element_type: element type
1390  * @rank: the dimension of the array class
1391  *
1392  * Returns: a class object describing the array with element type @element_type and
1393  * dimension @rank.
1394  */
1395 MonoClass *
1396 mono_array_class_get (MonoType *element_type, guint32 rank)
1397 {
1398         MonoClass *eclass;
1399         MonoImage *image;
1400         MonoClass *class;
1401         MonoClass *parent = NULL;
1402         GSList *list;
1403         int rnum = 0, nsize;
1404         char *name;
1405
1406         eclass = mono_class_from_mono_type (element_type);
1407         g_assert (rank <= 255);
1408
1409         parent = mono_defaults.array_class;
1410
1411         if (!parent->inited)
1412                 mono_class_init (parent);
1413
1414         image = eclass->image;
1415
1416         if ((list = g_hash_table_lookup (image->array_cache, element_type))) {
1417                 for (; list; list = list->next) {
1418                         class = list->data;
1419                         if (class->rank == rank)
1420                                 return class;
1421                 }
1422         }
1423
1424         class = g_malloc0 (sizeof (MonoClass) + parent->vtable_size * sizeof (gpointer));
1425
1426         class->image = image;
1427         class->name_space = eclass->name_space;
1428         nsize = strlen (eclass->name);
1429         name = g_malloc (nsize + 2 + rank);
1430         memcpy (name, eclass->name, nsize);
1431         name [nsize] = '[';
1432         if (rank > 1)
1433                 memset (name + nsize + 1, ',', rank - 1);
1434         name [nsize + rank] = ']';
1435         name [nsize + rank + 1] = 0;
1436         class->name = name;
1437         class->type_token = 0;
1438         class->flags = TYPE_ATTRIBUTE_CLASS | (eclass->flags & TYPE_ATTRIBUTE_VISIBILITY_MASK);
1439         class->parent = parent;
1440         class->instance_size = mono_class_instance_size (class->parent);
1441         class->class_size = 0;
1442         class->vtable_size = parent->vtable_size;
1443         class->parent->subclasses = g_list_prepend (class->parent->subclasses, class);
1444         mono_compute_relative_numbering (mono_defaults.object_class, &rnum);
1445
1446         class->rank = rank;
1447
1448         if (eclass->enumtype)
1449                 class->cast_class = eclass->element_class;
1450         else
1451                 class->cast_class = eclass;
1452
1453         class->element_class = eclass;
1454
1455         if (rank > 1) {
1456                 MonoArrayType *at = g_new0 (MonoArrayType, 1);
1457                 class->byval_arg.type = MONO_TYPE_ARRAY;
1458                 class->byval_arg.data.array = at;
1459                 at->type = &eclass->byval_arg;
1460                 at->rank = rank;
1461                 /* FIXME: complete.... */
1462         } else {
1463                 /* FIXME: this is not correct. the lbound could be >0 */
1464                 class->byval_arg.type = MONO_TYPE_SZARRAY;
1465                 class->byval_arg.data.type = &eclass->byval_arg;
1466         }
1467         class->this_arg = class->byval_arg;
1468         class->this_arg.byref = 1;
1469
1470         list = g_slist_append (list, class);
1471         g_hash_table_insert (image->array_cache, &class->element_class->byval_arg, list);
1472         return class;
1473 }
1474
1475 /**
1476  * mono_class_instance_size:
1477  * @klass: a class
1478  *
1479  * Returns: the size of an object instance
1480  */
1481 gint32
1482 mono_class_instance_size (MonoClass *klass)
1483 {
1484
1485         if (!klass->size_inited)
1486                 mono_class_init (klass);
1487
1488         return klass->instance_size;
1489 }
1490
1491 /**
1492  * mono_class_native_size:
1493  * @klass: a class
1494  *
1495  * Returns: the native size of an object instance (when marshaled
1496  * to unmanaged code)
1497  */
1498 gint32
1499 mono_class_native_size (MonoClass *klass, guint32 *align)
1500 {
1501
1502         if (!klass->marshal_info)
1503                 mono_marshal_load_type_info (klass);
1504
1505         if (align)
1506                 *align = klass->min_align;
1507
1508         return klass->marshal_info->native_size;
1509 }
1510
1511 /**
1512  * mono_class_min_align:
1513  * @klass: a class
1514  *
1515  * Returns: minimm alignment requirements
1516  */
1517 gint32
1518 mono_class_min_align (MonoClass *klass)
1519 {
1520
1521         if (!klass->size_inited)
1522                 mono_class_init (klass);
1523
1524         return klass->min_align;
1525 }
1526
1527 /**
1528  * mono_class_value_size:
1529  * @klass: a class
1530  *
1531  * This function is used for value types, and return the
1532  * space and the alignment to store that kind of value object.
1533  *
1534  * Returns: the size of a value of kind @klass
1535  */
1536 gint32
1537 mono_class_value_size      (MonoClass *klass, guint32 *align)
1538 {
1539         gint32 size;
1540
1541         /* fixme: check disable, because we still have external revereces to
1542          * mscorlib and Dummy Objects
1543          */
1544         /*g_assert (klass->valuetype);*/
1545
1546         size = mono_class_instance_size (klass) - sizeof (MonoObject);
1547
1548         if (align)
1549                 *align = klass->min_align;
1550
1551         return size;
1552 }
1553
1554 /**
1555  * mono_class_data_size:
1556  * @klass: a class
1557  *
1558  * Returns: the size of the static class data
1559  */
1560 gint32
1561 mono_class_data_size (MonoClass *klass)
1562 {
1563
1564         if (!klass->inited)
1565                 mono_class_init (klass);
1566
1567         return klass->class_size;
1568 }
1569
1570 /*
1571  * Auxiliary routine to mono_class_get_field
1572  *
1573  * Takes a field index instead of a field token.
1574  */
1575 static MonoClassField *
1576 mono_class_get_field_idx (MonoClass *class, int idx)
1577 {
1578         if (class->field.count){
1579                 if ((idx >= class->field.first) && (idx < class->field.last)){
1580                         return &class->fields [idx - class->field.first];
1581                 }
1582         }
1583
1584         if (!class->parent)
1585                 return NULL;
1586
1587         return mono_class_get_field_idx (class->parent, idx);
1588 }
1589
1590 /**
1591  * mono_class_get_field:
1592  * @class: the class to lookup the field.
1593  * @field_token: the field token
1594  *
1595  * Returns: A MonoClassField representing the type and offset of
1596  * the field, or a NULL value if the field does not belong to this
1597  * class.
1598  */
1599 MonoClassField *
1600 mono_class_get_field (MonoClass *class, guint32 field_token)
1601 {
1602         int idx = mono_metadata_token_index (field_token);
1603
1604         g_assert (mono_metadata_token_code (field_token) == MONO_TOKEN_FIELD_DEF);
1605
1606         return mono_class_get_field_idx (class, idx - 1);
1607 }
1608
1609 MonoClassField *
1610 mono_class_get_field_from_name (MonoClass *klass, const char *name)
1611 {
1612         int i;
1613
1614         while (klass) {
1615                 for (i = 0; i < klass->field.count; ++i) {
1616                         if (strcmp (name, klass->fields [i].name) == 0)
1617                                 return &klass->fields [i];
1618                 }
1619                 klass = klass->parent;
1620         }
1621         return NULL;
1622 }
1623
1624 MonoProperty*
1625 mono_class_get_property_from_name (MonoClass *klass, const char *name)
1626 {
1627         int i;
1628
1629         while (klass) {
1630                 for (i = 0; i < klass->property.count; ++i) {
1631                         if (strcmp (name, klass->properties [i].name) == 0)
1632                                 return &klass->properties [i];
1633                 }
1634                 klass = klass->parent;
1635         }
1636         return NULL;
1637 }
1638
1639 /**
1640  * mono_class_get:
1641  * @image: the image where the class resides
1642  * @type_token: the token for the class
1643  * @at: an optional pointer to return the array element type
1644  *
1645  * Returns: the MonoClass that represents @type_token in @image
1646  */
1647 MonoClass *
1648 mono_class_get (MonoImage *image, guint32 type_token)
1649 {
1650         MonoClass *class;
1651
1652         if (image->assembly->dynamic)
1653                 return mono_lookup_dynamic_token (image, type_token);
1654
1655         switch (type_token & 0xff000000){
1656         case MONO_TOKEN_TYPE_DEF:
1657                 class = mono_class_create_from_typedef (image, type_token);
1658                 break;
1659         case MONO_TOKEN_TYPE_REF:
1660                 class = mono_class_from_typeref (image, type_token);
1661                 break;
1662         case MONO_TOKEN_TYPE_SPEC:
1663                 class = mono_class_create_from_typespec (image, type_token);
1664                 break;
1665         default:
1666                 g_warning ("unknown token type %x", type_token & 0xff000000);
1667                 g_assert_not_reached ();
1668         }
1669
1670         if (!class)
1671                 g_warning ("Could not load class from token 0x%08x in %s", type_token, image->name);
1672
1673         return class;
1674 }
1675
1676 MonoClass *
1677 mono_class_from_name_case (MonoImage *image, const char* name_space, const char *name)
1678 {
1679         MonoTableInfo  *t = &image->tables [MONO_TABLE_TYPEDEF];
1680         guint32 cols [MONO_TYPEDEF_SIZE];
1681         const char *n;
1682         const char *nspace;
1683         guint32 i, visib;
1684
1685         /* add a cache if needed */
1686         for (i = 1; i <= t->rows; ++i) {
1687                 mono_metadata_decode_row (t, i - 1, cols, MONO_TYPEDEF_SIZE);
1688                 /* nested types are accessed from the nesting name */
1689                 visib = cols [MONO_TYPEDEF_FLAGS] & TYPE_ATTRIBUTE_VISIBILITY_MASK;
1690                 if (visib > TYPE_ATTRIBUTE_PUBLIC && visib <= TYPE_ATTRIBUTE_NESTED_ASSEMBLY)
1691                         continue;
1692                 n = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
1693                 nspace = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);
1694                 if (g_strcasecmp (n, name) == 0 && g_strcasecmp (nspace, name_space) == 0)
1695                         return mono_class_get (image, MONO_TOKEN_TYPE_DEF | i);
1696         }
1697         return NULL;
1698 }
1699
1700 MonoClass *
1701 mono_class_from_name (MonoImage *image, const char* name_space, const char *name)
1702 {
1703         GHashTable *nspace_table;
1704         guint32 token;
1705
1706         nspace_table = g_hash_table_lookup (image->name_cache, name_space);
1707         if (!nspace_table)
1708                 return 0;
1709         token = GPOINTER_TO_UINT (g_hash_table_lookup (nspace_table, name));
1710
1711         if (!token) {
1712                 /*g_warning ("token not found for %s.%s in image %s", name_space, name, image->name);*/
1713                 return NULL;
1714         }
1715
1716         token = MONO_TOKEN_TYPE_DEF | token;
1717
1718         return mono_class_get (image, token);
1719 }
1720
1721 /*
1722  * Returns the nnumber of bytes an element of type klass
1723  * uses when stored into an array.
1724  */
1725 gint32
1726 mono_class_array_element_size (MonoClass *klass)
1727 {
1728         int t = klass->byval_arg.type;
1729
1730 handle_enum:
1731         switch (t) {
1732         case MONO_TYPE_I1:
1733         case MONO_TYPE_U1:
1734         case MONO_TYPE_BOOLEAN:
1735                 return 1;
1736         case MONO_TYPE_I2:
1737         case MONO_TYPE_U2:
1738         case MONO_TYPE_CHAR:
1739                 return 2;
1740         case MONO_TYPE_I4:
1741         case MONO_TYPE_U4:
1742         case MONO_TYPE_R4:
1743                 return 4;
1744         case MONO_TYPE_I:
1745         case MONO_TYPE_U:
1746         case MONO_TYPE_PTR:
1747         case MONO_TYPE_CLASS:
1748         case MONO_TYPE_STRING:
1749         case MONO_TYPE_OBJECT:
1750         case MONO_TYPE_SZARRAY:
1751         case MONO_TYPE_ARRAY:
1752                 return sizeof (gpointer);
1753         case MONO_TYPE_I8:
1754         case MONO_TYPE_U8:
1755         case MONO_TYPE_R8:
1756                 return 8;
1757         case MONO_TYPE_VALUETYPE:
1758                 if (klass->enumtype) {
1759                         t = klass->enum_basetype->type;
1760                         goto handle_enum;
1761                 }
1762                 return mono_class_instance_size (klass) - sizeof (MonoObject);
1763         default:
1764                 g_error ("unknown type 0x%02x in mono_class_array_element_size", t);
1765         }
1766         return -1;
1767 }
1768
1769 /**
1770  * mono_array_element_size:
1771  * @ac: pointer to a #MonoArrayClass
1772  *
1773  * Returns: the size of single array element.
1774  */
1775 gint32
1776 mono_array_element_size (MonoClass *ac)
1777 {
1778         return mono_class_array_element_size (ac->element_class);
1779 }
1780
1781 gpointer
1782 mono_ldtoken (MonoImage *image, guint32 token, MonoClass **handle_class)
1783 {
1784         if (image->assembly->dynamic) {
1785                 gpointer obj = mono_lookup_dynamic_token (image, token);
1786
1787                 switch (token & 0xff000000) {
1788                 case MONO_TOKEN_TYPE_DEF:
1789                 case MONO_TOKEN_TYPE_REF:
1790                 case MONO_TOKEN_TYPE_SPEC:
1791                         if (handle_class)
1792                                 *handle_class = mono_defaults.typehandle_class;
1793                         return &((MonoClass*)obj)->byval_arg;
1794                 case MONO_TOKEN_METHOD_DEF:
1795                         if (handle_class)
1796                                 *handle_class = mono_defaults.methodhandle_class;
1797                         return obj;
1798                 case MONO_TOKEN_FIELD_DEF:
1799                         if (handle_class)
1800                                 *handle_class = mono_defaults.fieldhandle_class;
1801                         return obj;
1802                 default:
1803                         g_assert_not_reached ();
1804                 }
1805         }
1806
1807         switch (token & 0xff000000) {
1808         case MONO_TOKEN_TYPE_DEF:
1809         case MONO_TOKEN_TYPE_REF: {
1810                 MonoClass *class;
1811                 if (handle_class)
1812                         *handle_class = mono_defaults.typehandle_class;
1813                 class = mono_class_get (image, token);
1814                 mono_class_init (class);
1815                 /* We return a MonoType* as handle */
1816                 return &class->byval_arg;
1817         }
1818         case MONO_TOKEN_TYPE_SPEC: {
1819                 MonoClass *class;
1820                 if (handle_class)
1821                         *handle_class = mono_defaults.typehandle_class;
1822                 class = mono_class_create_from_typespec (image, token);
1823                 mono_class_init (class);
1824                 return &class->byval_arg;
1825         }
1826         case MONO_TOKEN_FIELD_DEF: {
1827                 MonoClass *class;
1828                 guint32 type = mono_metadata_typedef_from_field (image, mono_metadata_token_index (token));
1829                 class = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
1830                 mono_class_init (class);
1831                 if (handle_class)
1832                                 *handle_class = mono_defaults.fieldhandle_class;
1833                 return mono_class_get_field (class, token);
1834         }
1835         case MONO_TOKEN_METHOD_DEF:
1836         case MONO_TOKEN_MEMBER_REF:
1837         default:
1838                 g_warning ("Unknown token 0x%08x in ldtoken", token);
1839                 break;
1840         }
1841         return NULL;
1842 }
1843
1844 /**
1845  * This function might need to call runtime functions so it can't be part
1846  * of the metadata library.
1847  */
1848 static MonoLookupDynamicToken lookup_dynamic = NULL;
1849
1850 void
1851 mono_install_lookup_dynamic_token (MonoLookupDynamicToken func)
1852 {
1853         lookup_dynamic = func;
1854 }
1855
1856 gpointer
1857 mono_lookup_dynamic_token (MonoImage *image, guint32 token)
1858 {
1859         return lookup_dynamic (image, token);
1860 }