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/metadata/reflection.h>
  33 #include <mono/os/gc_wrapper.h>
  34
  35 /*
  36  * Uncomment this to enable GC aware auto layout: in this mode, reference
  37  * fields are grouped together inside objects, increasing collector
  38  * performance.
  39  * Requires that all classes whose layout is known to native code be annotated
  40  * with [StructLayout (LayoutKind.Sequential)]
  41  */
  42 //#define GC_AWARE_AUTO_LAYOUT
  43
  44 #define CSIZE(x) (sizeof (x) / 4)
  45
  46 MonoStats mono_stats;
  47
  48 gboolean mono_print_vtable = FALSE;
  49
  50 static MonoClass * mono_class_create_from_typedef (MonoImage *image, guint32 type_token);
  51
  52 void (*mono_debugger_class_init_func) (MonoClass *klass) = NULL;
  53
  54 MonoClass *
  55 mono_class_from_typeref (MonoImage *image, guint32 type_token)
  56 {
  57         guint32 cols [MONO_TYPEREF_SIZE];
  58         MonoTableInfo  *t = &image->tables [MONO_TABLE_TYPEREF];
  59         guint32 idx;
  60         const char *name, *nspace;
  61         MonoClass *res;
  62         MonoAssembly **references;
  63         MonoImageOpenStatus status;
  64
  65         mono_metadata_decode_row (t, (type_token&0xffffff)-1, cols, MONO_TYPEREF_SIZE);
  66
  67         name = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAME]);
  68         nspace = mono_metadata_string_heap (image, cols [MONO_TYPEREF_NAMESPACE]);
  69
  70         idx = cols [MONO_TYPEREF_SCOPE] >> RESOLTION_SCOPE_BITS;
  71         switch (cols [MONO_TYPEREF_SCOPE] & RESOLTION_SCOPE_MASK) {
  72         case RESOLTION_SCOPE_MODULE:
  73                 if (!idx)
  74                         g_error ("null ResolutionScope not yet handled");
  75                 /* a typedef in disguise */
  76                 return mono_class_from_name (image, nspace, name);
  77         case RESOLTION_SCOPE_MODULEREF:
  78                 return mono_class_from_name (image->modules [idx - 1], nspace, name);
  79         case RESOLTION_SCOPE_TYPEREF: {
  80                 MonoClass *enclosing = mono_class_from_typeref (image, MONO_TOKEN_TYPE_REF | idx);
  81                 GList *tmp;
  82                 mono_class_init (enclosing);
  83                 for (tmp = enclosing->nested_classes; tmp; tmp = tmp->next) {
  84                         res = tmp->data;
  85                         if (strcmp (res->name, name) == 0)
  86                                 return res;
  87                 }
  88                 g_warning ("TypeRef ResolutionScope not yet handled (%d)", idx);
  89                 return NULL;
  90         }
  91         case RESOLTION_SCOPE_ASSEMBLYREF:
  92                 break;
  93         }
  94
  95         mono_image_load_references (image, &status);
  96         references = image->references;
  97         if (!references ||  !references [idx-1]) {
  98                 /*
  99                  * detected a reference to mscorlib, we simply return a reference to a dummy
 100                  * until we have a better solution.
 101                  */
 102                 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]));
 103
 104                 res = mono_class_from_name (image, "System", "MonoDummy");
 105                 /* prevent method loading */
 106                 res->dummy = 1;
 107                 /* some storage if the type is used  - very ugly hack */
 108                 res->instance_size = 2*sizeof (gpointer);
 109                 return res;
 110         }
 111
 112         /* load referenced assembly */
 113         image = references [idx-1]->image;
 114
 115         return mono_class_from_name (image, nspace, name);
 116 }
 117
 118 /**
 119  * class_compute_field_layout:
 120  * @m: pointer to the metadata.
 121  * @class: The class to initialize
 122  *
 123  * Initializes the class->fields.
 124  *
 125  * Currently we only support AUTO_LAYOUT, and do not even try to do
 126  * a good job at it.  This is temporary to get the code for Paolo.
 127  */
 128 static void
 129 class_compute_field_layout (MonoClass *class)
 130 {
 131         MonoImage *m = class->image;
 132         const int top = class->field.count;
 133         guint32 layout = class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK;
 134         MonoTableInfo *t = &m->tables [MONO_TABLE_FIELD];
 135         int i, blittable = TRUE, real_size = 0;
 136         guint32 rva;
 137         guint32 packing_size = 0;
 138         gboolean explicit_size;
 139
 140         if (class->size_inited)
 141                 return;
 142
 143         if (class->parent) {
 144                 if (!class->parent->size_inited)
 145                         class_compute_field_layout (class->parent);
 146                 class->instance_size += class->parent->instance_size;
 147                 class->min_align = class->parent->min_align;
 148                 blittable = class->blittable;
 149         } else {
 150                 class->instance_size = sizeof (MonoObject);
 151                 class->min_align = 1;
 152         }
 153
 154         /* Get the real size */
 155         explicit_size = mono_metadata_packing_from_typedef (class->image, class->type_token, &packing_size, &real_size);
 156
 157         if (explicit_size) {
 158                 g_assert ((packing_size & 0xfffffff0) == 0);
 159                 class->packing_size = packing_size;
 160                 real_size += class->instance_size;
 161         }
 162
 163         if (!top) {
 164                 if (explicit_size && real_size) {
 165                         class->instance_size = MAX (real_size, class->instance_size);
 166                 }
 167                 class->size_inited = 1;
 168                 return;
 169         }
 170
 171         class->fields = g_new0 (MonoClassField, top);
 172
 173         /*
 174          * Fetch all the field information.
 175          */
 176         for (i = 0; i < top; i++){
 177                 const char *sig;
 178                 guint32 cols [MONO_FIELD_SIZE];
 179                 guint32 constant_cols [MONO_CONSTANT_SIZE];
 180                 guint32 cindex;
 181                 int idx = class->field.first + i;
 182
 183                 mono_metadata_decode_row (t, idx, cols, CSIZE (cols));
 184                 /* The name is needed for fieldrefs */
 185                 class->fields [i].name = mono_metadata_string_heap (m, cols [MONO_FIELD_NAME]);
 186                 sig = mono_metadata_blob_heap (m, cols [MONO_FIELD_SIGNATURE]);
 187                 mono_metadata_decode_value (sig, &sig);
 188                 /* FIELD signature == 0x06 */
 189                 g_assert (*sig == 0x06);
 190                 class->fields [i].type = mono_metadata_parse_field_type (
 191                         m, cols [MONO_FIELD_FLAGS], sig + 1, &sig);
 192
 193                 class->fields [i].parent = class;
 194
 195                 if (!(class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC)) {
 196                         if (class->fields [i].type->byref) {
 197                                 blittable = FALSE;
 198                         } else {
 199                                 MonoClass *field_class = mono_class_from_mono_type (class->fields [i].type);
 200                                 if (!field_class || !field_class->blittable)
 201                                         blittable = FALSE;
 202                         }
 203                 }
 204                 if (layout == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT) {
 205                         mono_metadata_field_info (m, idx, &class->fields [i].offset, NULL, NULL);
 206                         if (class->fields [i].offset == (guint32)-1)
 207                                 g_warning ("%s not initialized correctly (missing field layout info for %s)", class->name, class->fields [i].name);
 208                 }
 209
 210                 if (cols [MONO_FIELD_FLAGS] & FIELD_ATTRIBUTE_HAS_FIELD_RVA) {
 211                         mono_metadata_field_info (m, idx, NULL, &rva, NULL);
 212                         if (!rva)
 213                                 g_warning ("field %s in %s should have RVA data, but hasn't", class->fields [i].name, class->name);
 214                         class->fields [i].data = mono_cli_rva_map (class->image->image_info, rva);
 215                 }
 216
 217                 if (class->enumtype && !(cols [MONO_FIELD_FLAGS] & FIELD_ATTRIBUTE_STATIC)) {
 218                         class->enum_basetype = class->fields [i].type;
 219                         class->cast_class = class->element_class = mono_class_from_mono_type (class->enum_basetype);
 220                         blittable = class->element_class->blittable;
 221                 }
 222
 223                 if ((class->fields [i].type->attrs & FIELD_ATTRIBUTE_HAS_DEFAULT) &&
 224                         (class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC)) {
 225                         cindex = mono_metadata_get_constant_index (class->image, MONO_TOKEN_FIELD_DEF | (class->field.first + i + 1));
 226                         if (!cindex) {
 227                                 g_warning ("constant for field %s:%s not found", class->name, class->fields [i].name);
 228                                 continue;
 229                         }
 230                         mono_metadata_decode_row (&class->image->tables [MONO_TABLE_CONSTANT], cindex - 1, constant_cols, MONO_CONSTANT_SIZE);
 231                         class->fields [i].def_value = g_new0 (MonoConstant, 1);
 232                         class->fields [i].def_value->type = constant_cols [MONO_CONSTANT_TYPE];
 233                         class->fields [i].def_value->value = (gpointer)mono_metadata_blob_heap (class->image, constant_cols [MONO_CONSTANT_VALUE]);
 234                 }
 235         }
 236
 237         if (class == mono_defaults.string_class)
 238                 blittable = FALSE;
 239
 240         class->blittable = blittable;
 241
 242         if (class->enumtype && !class->enum_basetype) {
 243                 if (!((strcmp (class->name, "Enum") == 0) && (strcmp (class->name_space, "System") == 0)))
 244                         G_BREAKPOINT ();
 245         }
 246         if (explicit_size && real_size) {
 247                 class->instance_size = MAX (real_size, class->instance_size);
 248         }
 249
 250         mono_class_layout_fields (class);
 251 }
 252
 253 void
 254 mono_class_layout_fields (MonoClass *class)
 255 {
 256         int i;
 257         const int top = class->field.count;
 258         guint32 layout = class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK;
 259         guint32 pass, passes, real_size;
 260
 261         /*
 262          * Compute field layout and total size (not considering static fields)
 263          */
 264
 265         switch (layout) {
 266         case TYPE_ATTRIBUTE_AUTO_LAYOUT:
 267         case TYPE_ATTRIBUTE_SEQUENTIAL_LAYOUT:
 268
 269 #ifdef GC_AWARE_AUTO_LAYOUT
 270                 passes = 2;
 271 #else
 272                 passes = 1;
 273 #endif
 274                 if (layout != TYPE_ATTRIBUTE_AUTO_LAYOUT)
 275                         passes = 1;
 276
 277                 if (class->parent)
 278                         real_size = class->parent->instance_size;
 279                 else
 280                         real_size = sizeof (MonoObject);
 281
 282                 for (pass = 0; pass < passes; ++pass) {
 283                         for (i = 0; i < top; i++){
 284                                 int size, align;
 285
 286                                 if (class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC)
 287                                         continue;
 288
 289 #ifdef GC_AWARE_AUTO_LAYOUT
 290                                 /* FIXME: Fix mono_marshal_load_type_info () too */
 291                                 if (layout == TYPE_ATTRIBUTE_AUTO_LAYOUT) {
 292                                         /*
 293                                          * We process fields with reference type in the first pass,
 294                                          * and fields with non-reference type in the second pass.
 295                                          * We use IS_POINTER instead of IS_REFERENCE because in
 296                                          * some internal structures, we store GC_MALLOCed memory
 297                                          * in IntPtr fields...
 298                                          */
 299                                         if (MONO_TYPE_IS_POINTER (class->fields [i].type)) {
 300                                                 if (pass == 1)
 301                                                         continue;
 302                                         } else {
 303                                                 if (pass == 0)
 304                                                         continue;
 305                                         }
 306                                 }
 307 #endif
 308
 309                                 size = mono_type_size (class->fields [i].type, &align);
 310
 311                                 /* FIXME (LAMESPEC): should we also change the min alignment according to pack? */
 312                                 align = class->packing_size ? MIN (class->packing_size, align): align;
 313                                 class->min_align = MAX (align, class->min_align);
 314                                 class->fields [i].offset = real_size;
 315                                 class->fields [i].offset += align - 1;
 316                                 class->fields [i].offset &= ~(align - 1);
 317                                 real_size = class->fields [i].offset + size;
 318                         }
 319
 320                         class->instance_size = MAX (real_size, class->instance_size);
 321
 322                         if (class->instance_size & (class->min_align - 1)) {
 323                                 class->instance_size += class->min_align - 1;
 324                                 class->instance_size &= ~(class->min_align - 1);
 325                         }
 326                 }
 327                 break;
 328         case TYPE_ATTRIBUTE_EXPLICIT_LAYOUT:
 329                 real_size = 0;
 330                 for (i = 0; i < top; i++) {
 331                         int size, align;
 332
 333                         /*
 334                          * There must be info about all the fields in a type if it
 335                          * uses explicit layout.
 336                          */
 337
 338                         if (class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC)
 339                                 continue;
 340
 341                         size = mono_type_size (class->fields [i].type, &align);
 342
 343                         /*
 344                          * When we get here, class->fields [i].offset is already set by the
 345                          * loader (for either runtime fields or fields loaded from metadata).
 346                          * The offset is from the start of the object: this works for both
 347                          * classes and valuetypes.
 348                          */
 349                         class->fields [i].offset += sizeof (MonoObject);
 350
 351                         /*
 352                          * Calc max size.
 353                          */
 354                         real_size = MAX (real_size, size + class->fields [i].offset);
 355                 }
 356                 class->instance_size = MAX (real_size, class->instance_size);
 357                 break;
 358         }
 359
 360         class->size_inited = 1;
 361
 362         /*
 363          * Compute static field layout and size
 364          */
 365         for (i = 0; i < top; i++){
 366                 int size, align;
 367
 368                 if (!(class->fields [i].type->attrs & FIELD_ATTRIBUTE_STATIC))
 369                         continue;
 370
 371                 size = mono_type_size (class->fields [i].type, &align);
 372                 class->fields [i].offset = class->class_size;
 373                 class->fields [i].offset += align - 1;
 374                 class->fields [i].offset &= ~(align - 1);
 375                 class->class_size = class->fields [i].offset + size;
 376         }
 377 }
 378
 379 static void
 380 init_properties (MonoClass *class)
 381 {
 382         guint startm, endm, i, j;
 383         guint32 cols [MONO_PROPERTY_SIZE];
 384         MonoTableInfo *pt = &class->image->tables [MONO_TABLE_PROPERTY];
 385         MonoTableInfo *msemt = &class->image->tables [MONO_TABLE_METHODSEMANTICS];
 386
 387         class->property.first = mono_metadata_properties_from_typedef (class->image, mono_metadata_token_index (class->type_token) - 1, &class->property.last);
 388         class->property.count = class->property.last - class->property.first;
 389
 390         class->properties = g_new0 (MonoProperty, class->property.count);
 391         for (i = class->property.first; i < class->property.last; ++i) {
 392                 mono_metadata_decode_row (pt, i, cols, MONO_PROPERTY_SIZE);
 393                 class->properties [i - class->property.first].attrs = cols [MONO_PROPERTY_FLAGS];
 394                 class->properties [i - class->property.first].name = mono_metadata_string_heap (class->image, cols [MONO_PROPERTY_NAME]);
 395
 396                 startm = mono_metadata_methods_from_property (class->image, i, &endm);
 397                 for (j = startm; j < endm; ++j) {
 398                         mono_metadata_decode_row (msemt, j, cols, MONO_METHOD_SEMA_SIZE);
 399                         switch (cols [MONO_METHOD_SEMA_SEMANTICS]) {
 400                         case METHOD_SEMANTIC_SETTER:
 401                                 class->properties [i - class->property.first].set = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 402                                 break;
 403                         case METHOD_SEMANTIC_GETTER:
 404                                 class->properties [i - class->property.first].get = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 405                                 break;
 406                         default:
 407                                 break;
 408                         }
 409                 }
 410         }
 411 }
 412
 413 static void
 414 init_events (MonoClass *class)
 415 {
 416         guint startm, endm, i, j;
 417         guint32 cols [MONO_EVENT_SIZE];
 418         MonoTableInfo *pt = &class->image->tables [MONO_TABLE_EVENT];
 419         MonoTableInfo *msemt = &class->image->tables [MONO_TABLE_METHODSEMANTICS];
 420
 421         class->event.first = mono_metadata_events_from_typedef (class->image, mono_metadata_token_index (class->type_token) - 1, &class->event.last);
 422         class->event.count = class->event.last - class->event.first;
 423
 424         class->events = g_new0 (MonoEvent, class->event.count);
 425         for (i = class->event.first; i < class->event.last; ++i) {
 426                 mono_metadata_decode_row (pt, i, cols, MONO_EVENT_SIZE);
 427                 class->events [i - class->event.first].attrs = cols [MONO_EVENT_FLAGS];
 428                 class->events [i - class->event.first].name = mono_metadata_string_heap (class->image, cols [MONO_EVENT_NAME]);
 429
 430                 startm = mono_metadata_methods_from_event (class->image, i, &endm);
 431                 for (j = startm; j < endm; ++j) {
 432                         mono_metadata_decode_row (msemt, j, cols, MONO_METHOD_SEMA_SIZE);
 433                         switch (cols [MONO_METHOD_SEMA_SEMANTICS]) {
 434                         case METHOD_SEMANTIC_ADD_ON:
 435                                 class->events [i - class->event.first].add = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 436                                 break;
 437                         case METHOD_SEMANTIC_REMOVE_ON:
 438                                 class->events [i - class->event.first].remove = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 439                                 break;
 440                         case METHOD_SEMANTIC_FIRE:
 441                                 class->events [i - class->event.first].raise = class->methods [cols [MONO_METHOD_SEMA_METHOD] - 1 - class->method.first];
 442                                 break;
 443                         case METHOD_SEMANTIC_OTHER: /* don't care for now */
 444                         default:
 445                                 break;
 446                         }
 447                 }
 448         }
 449 }
 450
 451 static guint
 452 mono_get_unique_iid (MonoClass *class)
 453 {
 454         static GHashTable *iid_hash = NULL;
 455         static guint iid = 0;
 456
 457         char *str;
 458         gpointer value;
 459
 460         g_assert (class->flags & TYPE_ATTRIBUTE_INTERFACE);
 461
 462         if (!iid_hash)
 463                 iid_hash = g_hash_table_new (g_str_hash, g_str_equal);
 464
 465         str = g_strdup_printf ("%s|%s.%s\n", class->image->name, class->name_space, class->name);
 466
 467         if (g_hash_table_lookup_extended (iid_hash, str, NULL, &value)) {
 468                 g_free (str);
 469                 return (guint)value;
 470         } else {
 471                 g_hash_table_insert (iid_hash, str, (gpointer)iid);
 472                 ++iid;
 473         }
 474
 475         return iid - 1;
 476 }
 477
 478 static void
 479 collect_implemented_interfaces_aux (MonoClass *klass, GPtrArray *res)
 480 {
 481         int i;
 482         MonoClass *ic;
 483
 484         for (i = 0; i < klass->interface_count; i++) {
 485                 ic = klass->interfaces [i];
 486
 487                 g_ptr_array_add (res, ic);
 488
 489                 collect_implemented_interfaces_aux (ic, res);
 490         }
 491 }
 492
 493 static GPtrArray*
 494 collect_implemented_interfaces (MonoClass *klass)
 495 {
 496         GPtrArray *res = g_ptr_array_new ();
 497
 498         collect_implemented_interfaces_aux (klass, res);
 499         return res;
 500 }
 501
 502 static int
 503 setup_interface_offsets (MonoClass *class, int cur_slot)
 504 {
 505         MonoClass *k, *ic;
 506         int i, max_iid;
 507         GPtrArray *ifaces;
 508
 509         /* compute maximum number of slots and maximum interface id */
 510         max_iid = 0;
 511         for (k = class; k ; k = k->parent) {
 512                 for (i = 0; i < k->interface_count; i++) {
 513                         ic = k->interfaces [i];
 514
 515                         if (!ic->inited)
 516                                 mono_class_init (ic);
 517
 518                         if (max_iid < ic->interface_id)
 519                                 max_iid = ic->interface_id;
 520                 }
 521         }
 522
 523         if (class->flags & TYPE_ATTRIBUTE_INTERFACE) {
 524                 if (max_iid < class->interface_id)
 525                         max_iid = class->interface_id;
 526         }
 527         class->max_interface_id = max_iid;
 528         /* compute vtable offset for interfaces */
 529         class->interface_offsets = g_malloc (sizeof (gpointer) * (max_iid + 1));
 530
 531         for (i = 0; i <= max_iid; i++)
 532                 class->interface_offsets [i] = -1;
 533
 534         ifaces = collect_implemented_interfaces (class);
 535         for (i = 0; i < ifaces->len; ++i) {
 536                 ic = g_ptr_array_index (ifaces, i);
 537                 class->interface_offsets [ic->interface_id] = cur_slot;
 538                 cur_slot += ic->method.count;
 539         }
 540         g_ptr_array_free (ifaces, TRUE);
 541
 542         for (k = class->parent; k ; k = k->parent) {
 543                 ifaces = collect_implemented_interfaces (k);
 544                 for (i = 0; i < ifaces->len; ++i) {
 545                         ic = g_ptr_array_index (ifaces, i);
 546
 547                         if (class->interface_offsets [ic->interface_id] == -1) {
 548                                 int io = k->interface_offsets [ic->interface_id];
 549
 550                                 g_assert (io >= 0);
 551
 552                                 class->interface_offsets [ic->interface_id] = io;
 553                         }
 554                 }
 555                 g_ptr_array_free (ifaces, TRUE);
 556         }
 557
 558         return cur_slot;
 559 }
 560
 561 void
 562 mono_class_setup_vtable (MonoClass *class, MonoMethod **overrides, int onum)
 563 {
 564         MonoClass *k, *ic;
 565         MonoMethod **vtable;
 566         int i, max_vtsize = 0, max_iid, cur_slot = 0;
 567         GPtrArray *ifaces;
 568         MonoGHashTable *override_map;
 569
 570         /* setup_vtable() must be called only once on the type */
 571         if (class->interface_offsets) {
 572                 g_warning ("vtable already computed in %s.%s", class->name_space, class->name);
 573                 return;
 574         }
 575
 576         ifaces = collect_implemented_interfaces (class);
 577         for (i = 0; i < ifaces->len; i++) {
 578                 MonoClass *ic = g_ptr_array_index (ifaces, i);
 579                 max_vtsize += ic->method.count;
 580         }
 581         g_ptr_array_free (ifaces, TRUE);
 582
 583         if (class->parent) {
 584                 max_vtsize += class->parent->vtable_size;
 585                 cur_slot = class->parent->vtable_size;
 586         }
 587
 588         max_vtsize += class->method.count;
 589
 590         vtable = alloca (sizeof (gpointer) * max_vtsize);
 591         memset (vtable, 0, sizeof (gpointer) * max_vtsize);
 592
 593         /* printf ("METAINIT %s.%s\n", class->name_space, class->name); */
 594
 595         cur_slot = setup_interface_offsets (class, cur_slot);
 596         max_iid = class->max_interface_id;
 597
 598         if (class->parent && class->parent->vtable_size)
 599                 memcpy (vtable, class->parent->vtable,  sizeof (gpointer) * class->parent->vtable_size);
 600
 601         override_map = mono_g_hash_table_new (NULL, NULL);
 602
 603         /* override interface methods */
 604         for (i = 0; i < onum; i++) {
 605                 MonoMethod *decl = overrides [i*2];
 606                 if (decl->klass->flags & TYPE_ATTRIBUTE_INTERFACE) {
 607                         int dslot;
 608                         g_assert (decl->slot != -1);
 609                         dslot = decl->slot + class->interface_offsets [decl->klass->interface_id];
 610                         vtable [dslot] = overrides [i*2 + 1];
 611                         vtable [dslot]->slot = dslot;
 612                         mono_g_hash_table_insert (override_map, overrides [i * 2], overrides [i * 2 + 1]);
 613                 }
 614         }
 615
 616         for (k = class; k ; k = k->parent) {
 617                 ifaces = collect_implemented_interfaces (k);
 618                 for (i = 0; i < ifaces->len; i++) {
 619                         int j, l, io;
 620
 621                         ic = g_ptr_array_index (ifaces, i);
 622                         io = k->interface_offsets [ic->interface_id];
 623
 624                         g_assert (io >= 0);
 625                         g_assert (io <= max_vtsize);
 626
 627                         if (k == class) {
 628                                 for (l = 0; l < ic->method.count; l++) {
 629                                         MonoMethod *im = ic->methods [l];
 630
 631                                         if (vtable [io + l] && !(vtable [io + l]->flags & METHOD_ATTRIBUTE_ABSTRACT))
 632                                                 continue;
 633
 634                                         for (j = 0; j < class->method.count; ++j) {
 635                                                 MonoMethod *cm = class->methods [j];
 636                                                 if (!(cm->flags & METHOD_ATTRIBUTE_VIRTUAL) ||
 637                                                     !((cm->flags & METHOD_ATTRIBUTE_MEMBER_ACCESS_MASK) == METHOD_ATTRIBUTE_PUBLIC) ||
 638                                                     !(cm->flags & METHOD_ATTRIBUTE_NEW_SLOT))
 639                                                         continue;
 640                                                 if (!strcmp(cm->name, im->name) &&
 641                                                     mono_metadata_signature_equal (cm->signature, im->signature)) {
 642                                                         g_assert (io + l <= max_vtsize);
 643                                                         vtable [io + l] = cm;
 644                                                 }
 645                                         }
 646                                 }
 647                         } else {
 648                                 /* already implemented */
 649                                 if (io >= k->vtable_size)
 650                                         continue;
 651                         }
 652
 653                         for (l = 0; l < ic->method.count; l++) {
 654                                 MonoMethod *im = ic->methods [l];
 655                                 MonoClass *k1;
 656
 657                                 g_assert (io + l <= max_vtsize);
 658
 659                                 if (vtable [io + l] && !(vtable [io + l]->flags & METHOD_ATTRIBUTE_ABSTRACT))
 660                                         continue;
 661
 662                                 for (k1 = class; k1; k1 = k1->parent) {
 663                                         for (j = 0; j < k1->method.count; ++j) {
 664                                                 MonoMethod *cm = k1->methods [j];
 665
 666                                                 if (!(cm->flags & METHOD_ATTRIBUTE_VIRTUAL) ||
 667                                                     !(cm->flags & METHOD_ATTRIBUTE_PUBLIC))
 668                                                         continue;
 669
 670                                                 if (!strcmp(cm->name, im->name) &&
 671                                                     mono_metadata_signature_equal (cm->signature, im->signature)) {
 672                                                         g_assert (io + l <= max_vtsize);
 673                                                         vtable [io + l] = cm;
 674                                                         break;
 675                                                 }
 676
 677                                         }
 678                                         g_assert (io + l <= max_vtsize);
 679                                         if (vtable [io + l] && !(vtable [io + l]->flags & METHOD_ATTRIBUTE_ABSTRACT))
 680                                                 break;
 681                                 }
 682                         }
 683
 684                         for (l = 0; l < ic->method.count; l++) {
 685                                 MonoMethod *im = ic->methods [l];
 686                                 char *qname, *fqname;
 687                                 MonoClass *k1;
 688
 689                                 if (vtable [io + l])
 690                                         continue;
 691
 692                                 qname = g_strconcat (ic->name, ".", im->name, NULL);
 693                                 if (ic->name_space && ic->name_space [0])
 694                                         fqname = g_strconcat (ic->name_space, ".", ic->name, ".", im->name, NULL);
 695                                 else
 696                                         fqname = NULL;
 697
 698                                 for (k1 = class; k1; k1 = k1->parent) {
 699                                         for (j = 0; j < k1->method.count; ++j) {
 700                                                 MonoMethod *cm = k1->methods [j];
 701
 702                                                 if (!(cm->flags & METHOD_ATTRIBUTE_VIRTUAL))
 703                                                         continue;
 704
 705                                                 if (((fqname && !strcmp (cm->name, fqname)) || !strcmp (cm->name, qname)) &&
 706                                                     mono_metadata_signature_equal (cm->signature, im->signature)) {
 707                                                         g_assert (io + l <= max_vtsize);
 708                                                         vtable [io + l] = cm;
 709                                                         break;
 710                                                 }
 711                                         }
 712                                 }
 713                                 g_free (qname);
 714                                 g_free (fqname);
 715                         }
 716
 717
 718                         if (!(class->flags & TYPE_ATTRIBUTE_ABSTRACT)) {
 719                                 for (l = 0; l < ic->method.count; l++) {
 720                                         char *msig;
 721                                         MonoMethod *im = ic->methods [l];
 722                                         if (im->flags & METHOD_ATTRIBUTE_STATIC)
 723                                                         continue;
 724                                         g_assert (io + l <= max_vtsize);
 725                                         if (!(vtable [io + l])) {
 726                                                 for (j = 0; j < onum; ++j) {
 727                                                         g_print (" at slot %d: %s (%d) overrides %s (%d)\n", io+l, overrides [j*2+1]->name,
 728                                                                  overrides [j*2+1]->slot, overrides [j*2]->name, overrides [j*2]->slot);
 729                                                 }
 730                                                 msig = mono_signature_get_desc (im->signature, FALSE);
 731                                                 printf ("no implementation for interface method %s.%s::%s(%s) in class %s.%s\n",
 732                                                         ic->name_space, ic->name, im->name, msig, class->name_space, class->name);
 733                                                 g_free (msig);
 734                                                 for (j = 0; j < class->method.count; ++j) {
 735                                                         MonoMethod *cm = class->methods [j];
 736                                                         msig = mono_signature_get_desc (cm->signature, FALSE);
 737
 738                                                         printf ("METHOD %s(%s)\n", cm->name, msig);
 739                                                         g_free (msig);
 740                                                 }
 741                                                 g_assert_not_reached ();
 742                                         }
 743                                 }
 744                         }
 745
 746                         for (l = 0; l < ic->method.count; l++) {
 747                                 MonoMethod *im = vtable [io + l];
 748
 749                                 if (im) {
 750                                         g_assert (io + l <= max_vtsize);
 751                                         if (im->slot < 0) {
 752                                                 /* FIXME: why do we need this ? */
 753                                                 im->slot = io + l;
 754                                                 /* g_assert_not_reached (); */
 755                                         }
 756                                 }
 757                         }
 758                 }
 759                 g_ptr_array_free (ifaces, TRUE);
 760         }
 761
 762         for (i = 0; i < class->method.count; ++i) {
 763                 MonoMethod *cm;
 764
 765                 cm = class->methods [i];
 766
 767                 if (!(cm->flags & METHOD_ATTRIBUTE_NEW_SLOT) && (cm->flags & METHOD_ATTRIBUTE_VIRTUAL)) {
 768                         int slot = -1;
 769                         for (k = class->parent; k ; k = k->parent) {
 770                                 int j;
 771                                 for (j = 0; j < k->method.count; ++j) {
 772                                         MonoMethod *m1 = k->methods [j];
 773                                         if (!(m1->flags & METHOD_ATTRIBUTE_VIRTUAL))
 774                                                 continue;
 775                                         if (!strcmp(cm->name, m1->name) &&
 776                                             mono_metadata_signature_equal (cm->signature, m1->signature)) {
 777                                                 slot = k->methods [j]->slot;
 778                                                 g_assert (cm->slot < max_vtsize);
 779                                                 mono_g_hash_table_insert (override_map, m1, cm);
 780                                                 break;
 781                                         }
 782                                 }
 783                                 if (slot >= 0)
 784                                         break;
 785                         }
 786                         if (slot >= 0)
 787                                 cm->slot = slot;
 788                 }
 789
 790                 if (cm->slot < 0)
 791                         cm->slot = cur_slot++;
 792
 793                 if (!(cm->flags & METHOD_ATTRIBUTE_ABSTRACT))
 794                         vtable [cm->slot] = cm;
 795         }
 796
 797         /* override non interface methods */
 798         for (i = 0; i < onum; i++) {
 799                 MonoMethod *decl = overrides [i*2];
 800                 if (!(decl->klass->flags & TYPE_ATTRIBUTE_INTERFACE)) {
 801                         g_assert (decl->slot != -1);
 802                         vtable [decl->slot] = overrides [i*2 + 1];
 803                         overrides [i * 2 + 1]->slot = decl->slot;
 804                         mono_g_hash_table_insert (override_map, decl, overrides [i * 2 + 1]);
 805                 }
 806         }
 807
 808         /*
 809          * If a method occupies more than one place in the vtable, and it is
 810          * overriden, then change the other occurances too.
 811          */
 812         for (i = 0; i < max_vtsize; ++i)
 813                 if (vtable [i]) {
 814                         MonoMethod *cm = mono_g_hash_table_lookup (override_map, vtable [i]);
 815                         if (cm)
 816                                 vtable [i] = cm;
 817                 }
 818         mono_g_hash_table_destroy (override_map);
 819
 820         class->vtable_size = cur_slot;
 821         class->vtable = g_malloc0 (sizeof (gpointer) * class->vtable_size);
 822         memcpy (class->vtable, vtable,  sizeof (gpointer) * class->vtable_size);
 823
 824         if (mono_print_vtable) {
 825                 int icount = 0;
 826
 827                 for (i = 0; i <= max_iid; i++)
 828                         if (class->interface_offsets [i] != -1)
 829                                 icount++;
 830
 831                 printf ("VTable %s.%s (size = %d, interfaces = %d)\n", class->name_space,
 832                         class->name, class->vtable_size, icount);
 833
 834                 for (i = 0; i < class->vtable_size; ++i) {
 835                         MonoMethod *cm;
 836
 837                         cm = vtable [i];
 838                         if (cm) {
 839                                 printf ("  slot %03d(%03d) %s.%s:%s\n", i, cm->slot,
 840                                         cm->klass->name_space, cm->klass->name,
 841                                         cm->name);
 842                         }
 843                 }
 844
 845
 846                 if (icount) {
 847                         printf ("Interfaces %s.%s (max_iid = %d)\n", class->name_space,
 848                                 class->name, max_iid);
 849
 850                         for (i = 0; i < class->interface_count; i++) {
 851                                 ic = class->interfaces [i];
 852                                 printf ("  slot %03d(%03d) %s.%s\n",
 853                                         class->interface_offsets [ic->interface_id],
 854                                         ic->method.count, ic->name_space, ic->name);
 855                         }
 856
 857                         for (k = class->parent; k ; k = k->parent) {
 858                                 for (i = 0; i < k->interface_count; i++) {
 859                                         ic = k->interfaces [i];
 860                                         printf ("  slot %03d(%03d) %s.%s\n",
 861                                                 class->interface_offsets [ic->interface_id],
 862                                                 ic->method.count, ic->name_space, ic->name);
 863                                 }
 864                         }
 865                 }
 866         }
 867 }
 868
 869 /**
 870  * mono_class_init:
 871  * @class: the class to initialize
 872  *
 873  * compute the instance_size, class_size and other infos that cannot be
 874  * computed at mono_class_get() time. Also compute a generic vtable and
 875  * the method slot numbers. We use this infos later to create a domain
 876  * specific vtable.
 877  */
 878 void
 879 mono_class_init (MonoClass *class)
 880 {
 881         int i;
 882         static MonoMethod *default_ghc = NULL;
 883         static MonoMethod *default_finalize = NULL;
 884         static int finalize_slot = -1;
 885         static int ghc_slot = -1;
 886         MonoMethod **overrides;
 887         int onum = 0;
 888
 889         g_assert (class);
 890
 891         if (class->inited)
 892                 return;
 893
 894         if (class->init_pending) {
 895                 /* this indicates a cyclic dependency */
 896                 g_error ("pending init %s.%s\n", class->name_space, class->name);
 897         }
 898
 899         class->init_pending = 1;
 900
 901         mono_stats.initialized_class_count++;
 902
 903         if (class->parent && !class->parent->inited)
 904                 mono_class_init (class->parent);
 905
 906         /*
 907          * Computes the size used by the fields, and their locations
 908          */
 909         if (!class->size_inited)
 910                 class_compute_field_layout (class);
 911
 912         /* initialize method pointers */
 913         if (class->rank) {
 914                 MonoMethod *ctor;
 915                 MonoMethodSignature *sig;
 916                 class->method.count = class->rank > 1? 2: 1;
 917                 sig = mono_metadata_signature_alloc (class->image, class->rank);
 918                 sig->ret = &mono_defaults.void_class->byval_arg;
 919                 sig->pinvoke = TRUE;
 920                 for (i = 0; i < class->rank; ++i)
 921                         sig->params [i] = &mono_defaults.int32_class->byval_arg;
 922
 923                 ctor = (MonoMethod *) g_new0 (MonoMethodPInvoke, 1);
 924                 ctor->klass = class;
 925                 ctor->flags = METHOD_ATTRIBUTE_PUBLIC | METHOD_ATTRIBUTE_RT_SPECIAL_NAME | METHOD_ATTRIBUTE_SPECIAL_NAME;
 926                 ctor->iflags = METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL;
 927                 ctor->signature = sig;
 928                 ctor->name = ".ctor";
 929                 class->methods = g_new (MonoMethod*, class->method.count);
 930                 class->methods [0] = ctor;
 931                 if (class->rank > 1) {
 932                         sig = mono_metadata_signature_alloc (class->image, class->rank * 2);
 933                         sig->ret = &mono_defaults.void_class->byval_arg;
 934                         sig->pinvoke = TRUE;
 935                         for (i = 0; i < class->rank * 2; ++i)
 936                                 sig->params [i] = &mono_defaults.int32_class->byval_arg;
 937
 938                         ctor = (MonoMethod *) g_new0 (MonoMethodPInvoke, 1);
 939                         ctor->klass = class;
 940                         ctor->flags = METHOD_ATTRIBUTE_PUBLIC | METHOD_ATTRIBUTE_RT_SPECIAL_NAME | METHOD_ATTRIBUTE_SPECIAL_NAME;
 941                         ctor->iflags = METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL;
 942                         ctor->signature = sig;
 943                         ctor->name = ".ctor";
 944                         class->methods [1] = ctor;
 945                 }
 946         } else {
 947                 class->methods = g_new (MonoMethod*, class->method.count);
 948                 for (i = 0; i < class->method.count; ++i) {
 949                         class->methods [i] = mono_get_method (class->image,
 950                                 MONO_TOKEN_METHOD_DEF | (i + class->method.first + 1), class);
 951                 }
 952         }
 953
 954         init_properties (class);
 955         init_events (class);
 956
 957         i = mono_metadata_nesting_typedef (class->image, class->type_token, 1);
 958         while (i) {
 959                 MonoClass* nclass;
 960                 guint32 cols [MONO_NESTED_CLASS_SIZE];
 961                 mono_metadata_decode_row (&class->image->tables [MONO_TABLE_NESTEDCLASS], i - 1, cols, MONO_NESTED_CLASS_SIZE);
 962                 nclass = mono_class_create_from_typedef (class->image, MONO_TOKEN_TYPE_DEF | cols [MONO_NESTED_CLASS_NESTED]);
 963                 class->nested_classes = g_list_prepend (class->nested_classes, nclass);
 964
 965                 i = mono_metadata_nesting_typedef (class->image, class->type_token, i + 1);
 966         }
 967
 968         mono_class_setup_supertypes (class);
 969
 970         if (class->flags & TYPE_ATTRIBUTE_INTERFACE) {
 971                 for (i = 0; i < class->method.count; ++i)
 972                         class->methods [i]->slot = i;
 973                 class->init_pending = 0;
 974                 class->inited = 1;
 975                 /*
 976                  * class->interface_offsets is needed for the castclass/isinst code, so
 977                  * we have to setup them for interfaces, too.
 978                  */
 979                 setup_interface_offsets (class, 0);
 980                 return;
 981         }
 982
 983         overrides = mono_class_get_overrides (class->image, class->type_token, &onum);
 984         mono_class_setup_vtable (class, overrides, onum);
 985         g_free (overrides);
 986
 987         class->inited = 1;
 988         class->init_pending = 0;
 989
 990         if (!default_ghc) {
 991                 if (class == mono_defaults.object_class) {
 992
 993                         for (i = 0; i < class->vtable_size; ++i) {
 994                                 MonoMethod *cm = class->vtable [i];
 995
 996                                 if (!strcmp (cm->name, "GetHashCode")) {
 997                                         ghc_slot = i;
 998                                         break;
 999                                 }
1000                         }
1001
1002                         g_assert (ghc_slot > 0);
1003
1004                         default_ghc = class->vtable [ghc_slot];
1005                 }
1006         }
1007
1008         class->ghcimpl = 1;
1009         if (class->parent) {
1010
1011                 if (class->vtable [ghc_slot] == default_ghc) {
1012                         class->ghcimpl = 0;
1013                 }
1014         }
1015
1016         if (!default_finalize) {
1017                 if (class == mono_defaults.object_class) {
1018
1019                         for (i = 0; i < class->vtable_size; ++i) {
1020                                 MonoMethod *cm = class->vtable [i];
1021
1022                                 if (!strcmp (cm->name, "Finalize")) {
1023                                         finalize_slot = i;
1024                                         break;
1025                                 }
1026                         }
1027
1028                         g_assert (finalize_slot > 0);
1029
1030                         default_finalize = class->vtable [finalize_slot];
1031                 }
1032         }
1033
1034         /* Object::Finalize should have empty implemenatation */
1035         class->has_finalize = 0;
1036         if (class->parent) {
1037                 if (class->vtable [finalize_slot] != default_finalize)
1038                         class->has_finalize = 1;
1039         }
1040
1041         if (mono_debugger_class_init_func)
1042                 mono_debugger_class_init_func (class);
1043 }
1044
1045
1046 void
1047 mono_class_setup_mono_type (MonoClass *class)
1048 {
1049         const char *name = class->name;
1050         const char *nspace = class->name_space;
1051
1052         if (class->flags & TYPE_ATTRIBUTE_INTERFACE)
1053                 class->interface_id = mono_get_unique_iid (class);
1054
1055         class->this_arg.byref = 1;
1056         class->this_arg.data.klass = class;
1057         class->this_arg.type = MONO_TYPE_CLASS;
1058         class->byval_arg.data.klass = class;
1059         class->byval_arg.type = MONO_TYPE_CLASS;
1060
1061         if (!strcmp (nspace, "System")) {
1062                 if (!strcmp (name, "ValueType")) {
1063                         /*
1064                          * do not set the valuetype bit for System.ValueType.
1065                          * class->valuetype = 1;
1066                          */
1067                 } else if (!strcmp (name, "Enum")) {
1068                         /*
1069                          * do not set the valuetype bit for System.Enum.
1070                          * class->valuetype = 1;
1071                          */
1072                         class->valuetype = 0;
1073                         class->enumtype = 0;
1074                 } else if (!strcmp (name, "Object")) {
1075                         class->this_arg.type = class->byval_arg.type = MONO_TYPE_OBJECT;
1076                 } else if (!strcmp (name, "String")) {
1077                         class->this_arg.type = class->byval_arg.type = MONO_TYPE_STRING;
1078                 } else if (!strcmp (name, "TypedReference")) {
1079                         class->this_arg.type = class->byval_arg.type = MONO_TYPE_TYPEDBYREF;
1080                 }
1081         }
1082
1083         if (class->valuetype) {
1084                 int t = MONO_TYPE_VALUETYPE;
1085                 if (!strcmp (nspace, "System")) {
1086                         switch (*name) {
1087                         case 'B':
1088                                 if (!strcmp (name, "Boolean")) {
1089                                         t = MONO_TYPE_BOOLEAN;
1090                                 } else if (!strcmp(name, "Byte")) {
1091                                         t = MONO_TYPE_U1;
1092                                         class->blittable = TRUE;
1093                                 }
1094                                 break;
1095                         case 'C':
1096                                 if (!strcmp (name, "Char")) {
1097                                         t = MONO_TYPE_CHAR;
1098                                 }
1099                                 break;
1100                         case 'D':
1101                                 if (!strcmp (name, "Double")) {
1102                                         t = MONO_TYPE_R8;
1103                                         class->blittable = TRUE;
1104                                 }
1105                                 break;
1106                         case 'I':
1107                                 if (!strcmp (name, "Int32")) {
1108                                         t = MONO_TYPE_I4;
1109                                         class->blittable = TRUE;
1110                                 } else if (!strcmp(name, "Int16")) {
1111                                         t = MONO_TYPE_I2;
1112                                         class->blittable = TRUE;
1113                                 } else if (!strcmp(name, "Int64")) {
1114                                         t = MONO_TYPE_I8;
1115                                         class->blittable = TRUE;
1116                                 } else if (!strcmp(name, "IntPtr")) {
1117                                         t = MONO_TYPE_I;
1118                                         class->blittable = TRUE;
1119                                 }
1120                                 break;
1121                         case 'S':
1122                                 if (!strcmp (name, "Single")) {
1123                                         t = MONO_TYPE_R4;
1124                                         class->blittable = TRUE;
1125                                 } else if (!strcmp(name, "SByte")) {
1126                                         t = MONO_TYPE_I1;
1127                                         class->blittable = TRUE;
1128                                 }
1129                                 break;
1130                         case 'U':
1131                                 if (!strcmp (name, "UInt32")) {
1132                                         t = MONO_TYPE_U4;
1133                                         class->blittable = TRUE;
1134                                 } else if (!strcmp(name, "UInt16")) {
1135                                         t = MONO_TYPE_U2;
1136                                         class->blittable = TRUE;
1137                                 } else if (!strcmp(name, "UInt64")) {
1138                                         t = MONO_TYPE_U8;
1139                                         class->blittable = TRUE;
1140                                 } else if (!strcmp(name, "UIntPtr")) {
1141                                         t = MONO_TYPE_U;
1142                                         class->blittable = TRUE;
1143                                 }
1144                                 break;
1145                         case 'T':
1146                                 if (!strcmp (name, "TypedReference")) {
1147                                         t = MONO_TYPE_TYPEDBYREF;
1148                                         class->blittable = TRUE;
1149                                 }
1150                                 break;
1151                         case 'V':
1152                                 if (!strcmp (name, "Void")) {
1153                                         t = MONO_TYPE_VOID;
1154                                 }
1155                                 break;
1156                         default:
1157                                 break;
1158                         }
1159                 }
1160                 class->this_arg.type = class->byval_arg.type = t;
1161         }
1162 }
1163
1164 void
1165 mono_class_setup_parent (MonoClass *class, MonoClass *parent)
1166 {
1167         gboolean system_namespace;
1168
1169         system_namespace = !strcmp (class->name_space, "System");
1170
1171         /* if root of the hierarchy */
1172         if (system_namespace && !strcmp (class->name, "Object")) {
1173                 class->parent = NULL;
1174                 class->instance_size = sizeof (MonoObject);
1175                 return;
1176         }
1177         if (!strcmp (class->name, "<Module>")) {
1178                 class->parent = NULL;
1179                 class->instance_size = 0;
1180                 return;
1181         }
1182
1183         if (!(class->flags & TYPE_ATTRIBUTE_INTERFACE)) {
1184                 class->parent = parent;
1185
1186                 if (!parent)
1187                         g_assert_not_reached (); /* FIXME */
1188
1189                 class->marshalbyref = parent->marshalbyref;
1190                 class->contextbound  = parent->contextbound;
1191                 class->delegate  = parent->delegate;
1192
1193                 if (system_namespace) {
1194                         if (*class->name == 'M' && !strcmp (class->name, "MarshalByRefObject"))
1195                                 class->marshalbyref = 1;
1196
1197                         if (*class->name == 'C' && !strcmp (class->name, "ContextBoundObject"))
1198                                 class->contextbound  = 1;
1199
1200                         if (*class->name == 'D' && !strcmp (class->name, "Delegate"))
1201                                 class->delegate  = 1;
1202                 }
1203
1204                 if (class->parent->enumtype || ((strcmp (class->parent->name, "ValueType") == 0) &&
1205                                                 (strcmp (class->parent->name_space, "System") == 0)))
1206                         class->valuetype = 1;
1207                 if (((strcmp (class->parent->name, "Enum") == 0) && (strcmp (class->parent->name_space, "System") == 0))) {
1208                         class->valuetype = class->enumtype = 1;
1209                 }
1210                 /*class->enumtype = class->parent->enumtype; */
1211                 class->parent->subclasses = g_list_prepend (class->parent->subclasses, class);
1212                 mono_class_setup_supertypes (class);
1213         } else {
1214                 class->parent = NULL;
1215         }
1216
1217 }
1218
1219 void
1220 mono_class_setup_supertypes (MonoClass *class)
1221 {
1222         MonoClass *k;
1223         int ms, i;
1224
1225         if (class->supertypes)
1226                 return;
1227
1228         class->idepth = 0;
1229         for (k = class; k ; k = k->parent) {
1230                 class->idepth++;
1231         }
1232
1233         ms = MAX (MONO_DEFAULT_SUPERTABLE_SIZE, class->idepth);
1234         class->supertypes = g_new0 (MonoClass *, ms);
1235
1236         if (class->parent) {
1237                 for (i = class->idepth, k = class; k ; k = k->parent)
1238                         class->supertypes [--i] = k;
1239         } else {
1240                 class->supertypes [0] = class;
1241         }
1242 }
1243
1244 /**
1245  * @image: context where the image is created
1246  * @type_token:  typedef token
1247  */
1248 static MonoClass *
1249 mono_class_create_from_typedef (MonoImage *image, guint32 type_token)
1250 {
1251         MonoTableInfo *tt = &image->tables [MONO_TABLE_TYPEDEF];
1252         MonoClass *class, *parent = NULL;
1253         guint32 cols [MONO_TYPEDEF_SIZE];
1254         guint32 cols_next [MONO_TYPEDEF_SIZE];
1255         guint tidx = mono_metadata_token_index (type_token);
1256         const char *name, *nspace;
1257         guint icount = 0;
1258         MonoClass **interfaces;
1259
1260         if ((class = g_hash_table_lookup (image->class_cache, GUINT_TO_POINTER (type_token))))
1261                 return class;
1262
1263         g_assert (mono_metadata_token_table (type_token) == MONO_TABLE_TYPEDEF);
1264
1265         mono_metadata_decode_row (tt, tidx - 1, cols, MONO_TYPEDEF_SIZE);
1266
1267         name = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
1268         nspace = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);
1269
1270         if (cols [MONO_TYPEDEF_EXTENDS])
1271                 parent = mono_class_get (image, mono_metadata_token_from_dor (cols [MONO_TYPEDEF_EXTENDS]));
1272         interfaces = mono_metadata_interfaces_from_typedef (image, type_token, &icount);
1273
1274         class = g_malloc0 (sizeof (MonoClass));
1275
1276         g_hash_table_insert (image->class_cache, GUINT_TO_POINTER (type_token), class);
1277
1278         class->interfaces = interfaces;
1279         class->interface_count = icount;
1280
1281         class->name = name;
1282         class->name_space = nspace;
1283
1284         class->image = image;
1285         class->type_token = type_token;
1286         class->flags = cols [MONO_TYPEDEF_FLAGS];
1287
1288         if ((class->flags & TYPE_ATTRIBUTE_STRING_FORMAT_MASK) == TYPE_ATTRIBUTE_UNICODE_CLASS)
1289                 class->unicode = 1;
1290         /* fixme: maybe we must set this on windows
1291         if ((class->flags & TYPE_ATTRIBUTE_STRING_FORMAT_MASK) == TYPE_ATTRIBUTE_AUTO_CLASS)
1292                 class->unicode = 1;
1293         */
1294
1295         class->cast_class = class->element_class = class;
1296
1297         /*g_print ("Init class %s\n", name);*/
1298
1299         mono_class_setup_parent (class, parent);
1300
1301         mono_class_setup_mono_type (class);
1302
1303         /*
1304          * Compute the field and method lists
1305          */
1306         class->field.first  = cols [MONO_TYPEDEF_FIELD_LIST] - 1;
1307         class->method.first = cols [MONO_TYPEDEF_METHOD_LIST] - 1;
1308
1309         if (tt->rows > tidx){
1310                 mono_metadata_decode_row (tt, tidx, cols_next, CSIZE (cols_next));
1311                 class->field.last  = cols_next [MONO_TYPEDEF_FIELD_LIST] - 1;
1312                 class->method.last = cols_next [MONO_TYPEDEF_METHOD_LIST] - 1;
1313         } else {
1314                 class->field.last  = image->tables [MONO_TABLE_FIELD].rows;
1315                 class->method.last = image->tables [MONO_TABLE_METHOD].rows;
1316         }
1317
1318         if (cols [MONO_TYPEDEF_FIELD_LIST] &&
1319             cols [MONO_TYPEDEF_FIELD_LIST] <= image->tables [MONO_TABLE_FIELD].rows)
1320                 class->field.count = class->field.last - class->field.first;
1321         else
1322                 class->field.count = 0;
1323
1324         if (cols [MONO_TYPEDEF_METHOD_LIST] <= image->tables [MONO_TABLE_METHOD].rows)
1325                 class->method.count = class->method.last - class->method.first;
1326         else
1327                 class->method.count = 0;
1328
1329         /* reserve space to store vector pointer in arrays */
1330         if (!strcmp (nspace, "System") && !strcmp (name, "Array")) {
1331                 class->instance_size += 2 * sizeof (gpointer);
1332                 g_assert (class->field.count == 0);
1333         }
1334
1335         if (class->enumtype)
1336                 class_compute_field_layout (class);
1337
1338         if ((type_token = mono_metadata_nested_in_typedef (image, type_token)))
1339                 class->nested_in = mono_class_create_from_typedef (image, type_token);
1340
1341         return class;
1342 }
1343
1344 MonoClass *
1345 mono_ptr_class_get (MonoType *type)
1346 {
1347         MonoClass *result;
1348         MonoClass *el_class;
1349         static GHashTable *ptr_hash = NULL;
1350
1351         if (!ptr_hash)
1352                 ptr_hash = g_hash_table_new (g_direct_hash, g_direct_equal);
1353         el_class = mono_class_from_mono_type (type);
1354         if ((result = g_hash_table_lookup (ptr_hash, el_class)))
1355                 return result;
1356         result = g_new0 (MonoClass, 1);
1357
1358         result->parent = NULL; /* no parent for PTR types */
1359         result->name = "System";
1360         result->name_space = "MonoPtrFakeClass";
1361         result->image = el_class->image;
1362         result->inited = TRUE;
1363         result->flags = TYPE_ATTRIBUTE_CLASS | (el_class->flags & TYPE_ATTRIBUTE_VISIBILITY_MASK);
1364         /* Can pointers get boxed? */
1365         result->instance_size = sizeof (gpointer);
1366         result->cast_class = result->element_class = el_class;
1367         result->enum_basetype = &result->element_class->byval_arg;
1368
1369         result->this_arg.type = result->byval_arg.type = MONO_TYPE_PTR;
1370         result->this_arg.data.type = result->byval_arg.data.type = result->enum_basetype;
1371         result->this_arg.byref = TRUE;
1372
1373         mono_class_setup_supertypes (result);
1374
1375         g_hash_table_insert (ptr_hash, el_class, result);
1376
1377         return result;
1378 }
1379
1380 static MonoClass *
1381 mono_fnptr_class_get (MonoMethodSignature *sig)
1382 {
1383         MonoClass *result;
1384         static GHashTable *ptr_hash = NULL;
1385
1386         if (!ptr_hash)
1387                 ptr_hash = g_hash_table_new (g_direct_hash, g_direct_equal);
1388
1389         if ((result = g_hash_table_lookup (ptr_hash, sig)))
1390                 return result;
1391         result = g_new0 (MonoClass, 1);
1392
1393         result->parent = NULL; /* no parent for PTR types */
1394         result->name = "System";
1395         result->name_space = "MonoFNPtrFakeClass";
1396         result->image = NULL; /* need to fix... */
1397         result->inited = TRUE;
1398         result->flags = TYPE_ATTRIBUTE_CLASS; // | (el_class->flags & TYPE_ATTRIBUTE_VISIBILITY_MASK);
1399         /* Can pointers get boxed? */
1400         result->instance_size = sizeof (gpointer);
1401         result->cast_class = result->element_class = result;
1402
1403         result->this_arg.type = result->byval_arg.type = MONO_TYPE_FNPTR;
1404         result->this_arg.data.method = result->byval_arg.data.method = sig;
1405         result->this_arg.byref = TRUE;
1406         result->enum_basetype = &result->element_class->byval_arg;
1407
1408         mono_class_setup_supertypes (result);
1409
1410         g_hash_table_insert (ptr_hash, sig, result);
1411
1412         return result;
1413 }
1414
1415 MonoClass *
1416 mono_class_from_mono_type (MonoType *type)
1417 {
1418         switch (type->type) {
1419         case MONO_TYPE_OBJECT:
1420                 return mono_defaults.object_class;
1421         case MONO_TYPE_VOID:
1422                 return mono_defaults.void_class;
1423         case MONO_TYPE_BOOLEAN:
1424                 return mono_defaults.boolean_class;
1425         case MONO_TYPE_CHAR:
1426                 return mono_defaults.char_class;
1427         case MONO_TYPE_I1:
1428                 return mono_defaults.sbyte_class;
1429         case MONO_TYPE_U1:
1430                 return mono_defaults.byte_class;
1431         case MONO_TYPE_I2:
1432                 return mono_defaults.int16_class;
1433         case MONO_TYPE_U2:
1434                 return mono_defaults.uint16_class;
1435         case MONO_TYPE_I4:
1436                 return mono_defaults.int32_class;
1437         case MONO_TYPE_U4:
1438                 return mono_defaults.uint32_class;
1439         case MONO_TYPE_I:
1440                 return mono_defaults.int_class;
1441         case MONO_TYPE_U:
1442                 return mono_defaults.uint_class;
1443         case MONO_TYPE_I8:
1444                 return mono_defaults.int64_class;
1445         case MONO_TYPE_U8:
1446                 return mono_defaults.uint64_class;
1447         case MONO_TYPE_R4:
1448                 return mono_defaults.single_class;
1449         case MONO_TYPE_R8:
1450                 return mono_defaults.double_class;
1451         case MONO_TYPE_STRING:
1452                 return mono_defaults.string_class;
1453         case MONO_TYPE_TYPEDBYREF:
1454                 return mono_defaults.typed_reference_class;
1455         case MONO_TYPE_ARRAY:
1456                 return mono_array_class_get (type->data.array->eklass, type->data.array->rank);
1457         case MONO_TYPE_PTR:
1458                 return mono_ptr_class_get (type->data.type);
1459         case MONO_TYPE_FNPTR:
1460                 return mono_fnptr_class_get (type->data.method);
1461         case MONO_TYPE_SZARRAY:
1462                 return mono_array_class_get (type->data.klass, 1);
1463         case MONO_TYPE_CLASS:
1464         case MONO_TYPE_VALUETYPE:
1465                 return type->data.klass;
1466
1467         case MONO_TYPE_GENERICINST:
1468                 g_warning ("mono_class_from_type: implement me MONO_TYPE_GENERICINST");
1469                 g_assert_not_reached ();
1470
1471         case MONO_TYPE_VAR:
1472                 g_warning ("mono_class_from_type: implement me MONO_TYPE_VAR");
1473                 g_assert_not_reached ();
1474
1475         case MONO_TYPE_MVAR:
1476                 g_warning ("mono_class_from_type: implement me MONO_TYPE_MVAR");
1477                 g_assert_not_reached ();
1478
1479         default:
1480                 g_warning ("implement me 0x%02x\n", type->type);
1481                 g_assert_not_reached ();
1482         }
1483
1484         return NULL;
1485 }
1486
1487 /**
1488  * @image: context where the image is created
1489  * @type_spec:  typespec token
1490  */
1491 static MonoClass *
1492 mono_class_create_from_typespec (MonoImage *image, guint32 type_spec)
1493 {
1494         MonoType *type;
1495         MonoClass *class;
1496
1497         type = mono_type_create_from_typespec (image, type_spec);
1498
1499         switch (type->type) {
1500         case MONO_TYPE_ARRAY:
1501                 class = mono_array_class_get (type->data.array->eklass, type->data.array->rank);
1502                 break;
1503         case MONO_TYPE_SZARRAY:
1504                 class = mono_array_class_get (type->data.klass, 1);
1505                 break;
1506         case MONO_TYPE_PTR:
1507                 class = mono_class_from_mono_type (type->data.type);
1508                 break;
1509         default:
1510                 /* it seems any type can be stored in TypeSpec as well */
1511                 class = mono_class_from_mono_type (type);
1512                 break;
1513         }
1514
1515         mono_metadata_free_type (type);
1516
1517         return class;
1518 }
1519
1520 /**
1521  * mono_array_class_get:
1522  * @element_class: element class
1523  * @rank: the dimension of the array class
1524  *
1525  * Returns: a class object describing the array with element type @element_type and
1526  * dimension @rank.
1527  */
1528 MonoClass *
1529 mono_array_class_get (MonoClass *eclass, guint32 rank)
1530 {
1531         MonoImage *image;
1532         MonoClass *class;
1533         MonoClass *parent = NULL;
1534         GSList *list, *rootlist;
1535         int nsize;
1536         char *name;
1537
1538         g_assert (rank <= 255);
1539
1540         parent = mono_defaults.array_class;
1541
1542         if (!parent->inited)
1543                 mono_class_init (parent);
1544
1545         image = eclass->image;
1546
1547         if ((rootlist = list = g_hash_table_lookup (image->array_cache, eclass))) {
1548                 for (; list; list = list->next) {
1549                         class = list->data;
1550                         if (class->rank == rank)
1551                                 return class;
1552                 }
1553         }
1554
1555         class = g_malloc0 (sizeof (MonoClass) + parent->vtable_size * sizeof (gpointer));
1556
1557         class->image = image;
1558         class->name_space = eclass->name_space;
1559         nsize = strlen (eclass->name);
1560         name = g_malloc (nsize + 2 + rank);
1561         memcpy (name, eclass->name, nsize);
1562         name [nsize] = '[';
1563         if (rank > 1)
1564                 memset (name + nsize + 1, ',', rank - 1);
1565         name [nsize + rank] = ']';
1566         name [nsize + rank + 1] = 0;
1567         class->name = name;
1568         class->type_token = 0;
1569         /* all arrays are marked serializable and sealed, bug #42779 */
1570         class->flags = TYPE_ATTRIBUTE_CLASS | TYPE_ATTRIBUTE_SERIALIZABLE | TYPE_ATTRIBUTE_SEALED |
1571                 (eclass->flags & TYPE_ATTRIBUTE_VISIBILITY_MASK);
1572         class->parent = parent;
1573         class->instance_size = mono_class_instance_size (class->parent);
1574         class->class_size = 0;
1575         class->vtable_size = parent->vtable_size;
1576         class->parent->subclasses = g_list_prepend (class->parent->subclasses, class);
1577         mono_class_setup_supertypes (class);
1578
1579         class->rank = rank;
1580
1581         if (eclass->enumtype)
1582                 class->cast_class = eclass->element_class;
1583         else
1584                 class->cast_class = eclass;
1585
1586         class->element_class = eclass;
1587
1588         if (rank > 1) {
1589                 MonoArrayType *at = g_new0 (MonoArrayType, 1);
1590                 class->byval_arg.type = MONO_TYPE_ARRAY;
1591                 class->byval_arg.data.array = at;
1592                 at->eklass = eclass;
1593                 at->rank = rank;
1594                 /* FIXME: complete.... */
1595         } else {
1596                 /* FIXME: this is not correct. the lbound could be >0 */
1597                 class->byval_arg.type = MONO_TYPE_SZARRAY;
1598                 class->byval_arg.data.klass = eclass;
1599         }
1600         class->this_arg = class->byval_arg;
1601         class->this_arg.byref = 1;
1602
1603         list = g_slist_append (rootlist, class);
1604         g_hash_table_insert (image->array_cache, eclass, list);
1605         return class;
1606 }
1607
1608 /**
1609  * mono_class_instance_size:
1610  * @klass: a class
1611  *
1612  * Returns: the size of an object instance
1613  */
1614 gint32
1615 mono_class_instance_size (MonoClass *klass)
1616 {
1617
1618         if (!klass->size_inited)
1619                 mono_class_init (klass);
1620
1621         return klass->instance_size;
1622 }
1623
1624 /**
1625  * mono_class_min_align:
1626  * @klass: a class
1627  *
1628  * Returns: minimm alignment requirements
1629  */
1630 gint32
1631 mono_class_min_align (MonoClass *klass)
1632 {
1633
1634         if (!klass->size_inited)
1635                 mono_class_init (klass);
1636
1637         return klass->min_align;
1638 }
1639
1640 /**
1641  * mono_class_value_size:
1642  * @klass: a class
1643  *
1644  * This function is used for value types, and return the
1645  * space and the alignment to store that kind of value object.
1646  *
1647  * Returns: the size of a value of kind @klass
1648  */
1649 gint32
1650 mono_class_value_size      (MonoClass *klass, guint32 *align)
1651 {
1652         gint32 size;
1653
1654         /* fixme: check disable, because we still have external revereces to
1655          * mscorlib and Dummy Objects
1656          */
1657         /*g_assert (klass->valuetype);*/
1658
1659         size = mono_class_instance_size (klass) - sizeof (MonoObject);
1660
1661         if (align)
1662                 *align = klass->min_align;
1663
1664         return size;
1665 }
1666
1667 /**
1668  * mono_class_data_size:
1669  * @klass: a class
1670  *
1671  * Returns: the size of the static class data
1672  */
1673 gint32
1674 mono_class_data_size (MonoClass *klass)
1675 {
1676
1677         if (!klass->inited)
1678                 mono_class_init (klass);
1679
1680         return klass->class_size;
1681 }
1682
1683 /*
1684  * Auxiliary routine to mono_class_get_field
1685  *
1686  * Takes a field index instead of a field token.
1687  */
1688 static MonoClassField *
1689 mono_class_get_field_idx (MonoClass *class, int idx)
1690 {
1691         if (class->field.count){
1692                 if ((idx >= class->field.first) && (idx < class->field.last)){
1693                         return &class->fields [idx - class->field.first];
1694                 }
1695         }
1696
1697         if (!class->parent)
1698                 return NULL;
1699
1700         return mono_class_get_field_idx (class->parent, idx);
1701 }
1702
1703 /**
1704  * mono_class_get_field:
1705  * @class: the class to lookup the field.
1706  * @field_token: the field token
1707  *
1708  * Returns: A MonoClassField representing the type and offset of
1709  * the field, or a NULL value if the field does not belong to this
1710  * class.
1711  */
1712 MonoClassField *
1713 mono_class_get_field (MonoClass *class, guint32 field_token)
1714 {
1715         int idx = mono_metadata_token_index (field_token);
1716
1717         g_assert (mono_metadata_token_code (field_token) == MONO_TOKEN_FIELD_DEF);
1718
1719         return mono_class_get_field_idx (class, idx - 1);
1720 }
1721
1722 MonoClassField *
1723 mono_class_get_field_from_name (MonoClass *klass, const char *name)
1724 {
1725         int i;
1726
1727         while (klass) {
1728                 for (i = 0; i < klass->field.count; ++i) {
1729                         if (strcmp (name, klass->fields [i].name) == 0)
1730                                 return &klass->fields [i];
1731                 }
1732                 klass = klass->parent;
1733         }
1734         return NULL;
1735 }
1736
1737 MonoProperty*
1738 mono_class_get_property_from_name (MonoClass *klass, const char *name)
1739 {
1740         int i;
1741
1742         while (klass) {
1743                 for (i = 0; i < klass->property.count; ++i) {
1744                         if (strcmp (name, klass->properties [i].name) == 0)
1745                                 return &klass->properties [i];
1746                 }
1747                 klass = klass->parent;
1748         }
1749         return NULL;
1750 }
1751
1752 /**
1753  * mono_class_get:
1754  * @image: the image where the class resides
1755  * @type_token: the token for the class
1756  * @at: an optional pointer to return the array element type
1757  *
1758  * Returns: the MonoClass that represents @type_token in @image
1759  */
1760 MonoClass *
1761 mono_class_get (MonoImage *image, guint32 type_token)
1762 {
1763         MonoClass *class;
1764
1765         if (image->assembly->dynamic)
1766                 return mono_lookup_dynamic_token (image, type_token);
1767
1768         switch (type_token & 0xff000000){
1769         case MONO_TOKEN_TYPE_DEF:
1770                 class = mono_class_create_from_typedef (image, type_token);
1771                 break;
1772         case MONO_TOKEN_TYPE_REF:
1773                 class = mono_class_from_typeref (image, type_token);
1774                 break;
1775         case MONO_TOKEN_TYPE_SPEC:
1776                 class = mono_class_create_from_typespec (image, type_token);
1777                 break;
1778         default:
1779                 g_warning ("unknown token type %x", type_token & 0xff000000);
1780                 g_assert_not_reached ();
1781         }
1782
1783         if (!class)
1784                 g_warning ("Could not load class from token 0x%08x in %s", type_token, image->name);
1785
1786         return class;
1787 }
1788
1789 MonoClass *
1790 mono_class_from_name_case (MonoImage *image, const char* name_space, const char *name)
1791 {
1792         MonoTableInfo  *t = &image->tables [MONO_TABLE_TYPEDEF];
1793         guint32 cols [MONO_TYPEDEF_SIZE];
1794         const char *n;
1795         const char *nspace;
1796         guint32 i, visib;
1797
1798         /* add a cache if needed */
1799         for (i = 1; i <= t->rows; ++i) {
1800                 mono_metadata_decode_row (t, i - 1, cols, MONO_TYPEDEF_SIZE);
1801                 /* nested types are accessed from the nesting name */
1802                 visib = cols [MONO_TYPEDEF_FLAGS] & TYPE_ATTRIBUTE_VISIBILITY_MASK;
1803                 if (visib > TYPE_ATTRIBUTE_PUBLIC && visib <= TYPE_ATTRIBUTE_NESTED_ASSEMBLY)
1804                         continue;
1805                 n = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAME]);
1806                 nspace = mono_metadata_string_heap (image, cols [MONO_TYPEDEF_NAMESPACE]);
1807                 if (g_strcasecmp (n, name) == 0 && g_strcasecmp (nspace, name_space) == 0)
1808                         return mono_class_get (image, MONO_TOKEN_TYPE_DEF | i);
1809         }
1810         return NULL;
1811 }
1812
1813 static MonoImage*
1814 load_file_for_image (MonoImage *image, int fileidx)
1815 {
1816         char *base_dir, *name;
1817         MonoImage *res;
1818         MonoTableInfo  *t = &image->tables [MONO_TABLE_FILE];
1819         const char *fname;
1820         guint32 fname_id;
1821
1822         if (fileidx < 1 || fileidx > t->rows)
1823                 return NULL;
1824         fname_id = mono_metadata_decode_row_col (t, fileidx - 1, MONO_FILE_NAME);
1825         fname = mono_metadata_string_heap (image, fname_id);
1826         base_dir = g_path_get_dirname (image->name);
1827         name = g_build_filename (base_dir, fname, NULL);
1828         res = mono_image_open (name, NULL);
1829         if (res) {
1830                 int i;
1831                 t = &res->tables [MONO_TABLE_MODULEREF];
1832                 //g_print ("loaded file %s from %s (%p)\n", name, image->name, image->assembly);
1833                 res->assembly = image->assembly;
1834                 for (i = 0; i < t->rows; ++i) {
1835                         if (res->modules [i] && !res->modules [i]->assembly)
1836                                 res->modules [i]->assembly = image->assembly;
1837                 }
1838                 mono_image_load_references (image, NULL);
1839         }
1840         g_free (name);
1841         g_free (base_dir);
1842         return res;
1843 }
1844
1845 static MonoClass*
1846 return_nested_in (MonoClass *class, char *nested) {
1847         MonoClass *found;
1848         char *s = strchr (nested, '/');
1849         GList *tmp;
1850
1851         if (s) {
1852                 *s = 0;
1853                 s++;
1854         }
1855         for (tmp = class->nested_classes; tmp; tmp = tmp->next) {
1856                 found = tmp->data;
1857                 if (strcmp (found->name, nested) == 0) {
1858                         if (s)
1859                                 return return_nested_in (found, s);
1860                         return found;
1861                 }
1862         }
1863         return NULL;
1864 }
1865
1866 MonoClass *
1867 mono_class_from_name (MonoImage *image, const char* name_space, const char *name)
1868 {
1869         GHashTable *nspace_table;
1870         MonoImage *loaded_image;
1871         guint32 token;
1872         MonoClass *class;
1873         char *nested;
1874         char buf [1024];
1875
1876         if ((nested = strchr (name, '/'))) {
1877                 int pos = nested - name;
1878                 int len = strlen (name);
1879                 if (len > 1023)
1880                         return NULL;
1881                 memcpy (buf, name, len + 1);
1882                 buf [pos] = 0;
1883                 nested = buf + pos + 1;
1884                 name = buf;
1885         }
1886
1887         nspace_table = g_hash_table_lookup (image->name_cache, name_space);
1888
1889         if (!nspace_table || !(token = GPOINTER_TO_UINT (g_hash_table_lookup (nspace_table, name)))) {
1890                 MonoTableInfo  *t = &image->tables [MONO_TABLE_EXPORTEDTYPE];
1891                 guint32 cols [MONO_EXP_TYPE_SIZE];
1892                 int i;
1893
1894                 for (i = 0; i < t->rows; ++i) {
1895                         const char *ename, *enspace;
1896                         mono_metadata_decode_row (t, i, cols, MONO_EXP_TYPE_SIZE);
1897                         ename = mono_metadata_string_heap (image, cols [MONO_EXP_TYPE_NAME]);
1898                         enspace = mono_metadata_string_heap (image, cols [MONO_EXP_TYPE_NAMESPACE]);
1899
1900                         if (strcmp (name, ename) == 0 && strcmp (name_space, enspace) == 0) {
1901                                 guint32 impl = cols [MONO_EXP_TYPE_IMPLEMENTATION];
1902                                 if ((impl & IMPLEMENTATION_MASK) == IMPLEMENTATION_FILE) {
1903                                         loaded_image = load_file_for_image (image, impl >> IMPLEMENTATION_BITS);
1904                                         if (!loaded_image)
1905                                                 return NULL;
1906                                         class = mono_class_from_name (loaded_image, name_space, name);
1907                                         if (nested)
1908                                                 return return_nested_in (class, nested);
1909                                         return class;
1910                                 } else {
1911                                         g_error ("not yet implemented");
1912                                 }
1913                         }
1914                 }
1915                 /*g_warning ("token not found for %s.%s in image %s", name_space, name, image->name);*/
1916                 return NULL;
1917         }
1918
1919         token = MONO_TOKEN_TYPE_DEF | token;
1920
1921         class = mono_class_get (image, token);
1922         if (nested)
1923                 return return_nested_in (class, nested);
1924         return class;
1925 }
1926
1927 gboolean
1928 mono_class_is_subclass_of (MonoClass *klass, MonoClass *klassc,
1929                                                    gboolean check_interfaces)
1930 {
1931         if (check_interfaces && (klassc->flags & TYPE_ATTRIBUTE_INTERFACE) && !(klass->flags & TYPE_ATTRIBUTE_INTERFACE)) {
1932                 if ((klassc->interface_id <= klass->max_interface_id) &&
1933                         (klass->interface_offsets [klassc->interface_id] >= 0))
1934                         return TRUE;
1935         } else if (check_interfaces && (klassc->flags & TYPE_ATTRIBUTE_INTERFACE) && (klass->flags & TYPE_ATTRIBUTE_INTERFACE)) {
1936                 int i;
1937
1938                 for (i = 0; i < klass->interface_count; i ++) {
1939                         MonoClass *ic =  klass->interfaces [i];
1940                         if (ic == klassc)
1941                                 return TRUE;
1942                 }
1943         } else {
1944                 if (!(klass->flags & TYPE_ATTRIBUTE_INTERFACE) && mono_class_has_parent (klass, klassc))
1945                         return TRUE;
1946         }
1947
1948         /*
1949          * MS.NET thinks interfaces are a subclass of Object, so we think it as
1950          * well.
1951          */
1952         if (klassc == mono_defaults.object_class)
1953                 return TRUE;
1954
1955         return FALSE;
1956 }
1957
1958 gboolean
1959 mono_class_is_assignable_from (MonoClass *klass, MonoClass *oklass)
1960 {
1961         if (!klass->inited)
1962                 mono_class_init (klass);
1963
1964         if (!oklass->inited)
1965                 mono_class_init (oklass);
1966
1967         if (klass->flags & TYPE_ATTRIBUTE_INTERFACE) {
1968                 if ((klass->interface_id <= oklass->max_interface_id) &&
1969                     (oklass->interface_offsets [klass->interface_id] != -1))
1970                         return TRUE;
1971         } else
1972                 if (klass->rank) {
1973                         MonoClass *eclass, *eoclass;
1974
1975                         if (oklass->rank != klass->rank)
1976                                 return FALSE;
1977
1978                         eclass = klass->cast_class;
1979                         eoclass = oklass->cast_class;
1980
1981
1982                         /*
1983                          * a is b does not imply a[] is b[] when a is a valuetype, and
1984                          * b is a reference type.
1985                          */
1986
1987                         if (eoclass->valuetype) {
1988                                 if ((eclass == mono_defaults.enum_class) ||
1989                                         (eclass == mono_defaults.enum_class->parent) ||
1990                                         (eclass == mono_defaults.object_class))
1991                                         return FALSE;
1992                         }
1993
1994                         return mono_class_is_assignable_from (klass->cast_class, oklass->cast_class);
1995                 }
1996         else
1997                 if (klass == mono_defaults.object_class)
1998                         return TRUE;
1999
2000         return mono_class_has_parent (oklass, klass);
2001 }
2002
2003 /*
2004  * Returns the nnumber of bytes an element of type klass
2005  * uses when stored into an array.
2006  */
2007 gint32
2008 mono_class_array_element_size (MonoClass *klass)
2009 {
2010         int t = klass->byval_arg.type;
2011
2012 handle_enum:
2013         switch (t) {
2014         case MONO_TYPE_I1:
2015         case MONO_TYPE_U1:
2016         case MONO_TYPE_BOOLEAN:
2017                 return 1;
2018         case MONO_TYPE_I2:
2019         case MONO_TYPE_U2:
2020         case MONO_TYPE_CHAR:
2021                 return 2;
2022         case MONO_TYPE_I4:
2023         case MONO_TYPE_U4:
2024         case MONO_TYPE_R4:
2025                 return 4;
2026         case MONO_TYPE_I:
2027         case MONO_TYPE_U:
2028         case MONO_TYPE_PTR:
2029         case MONO_TYPE_CLASS:
2030         case MONO_TYPE_STRING:
2031         case MONO_TYPE_OBJECT:
2032         case MONO_TYPE_SZARRAY:
2033         case MONO_TYPE_ARRAY:
2034                 return sizeof (gpointer);
2035         case MONO_TYPE_I8:
2036         case MONO_TYPE_U8:
2037         case MONO_TYPE_R8:
2038                 return 8;
2039         case MONO_TYPE_VALUETYPE:
2040                 if (klass->enumtype) {
2041                         t = klass->enum_basetype->type;
2042                         goto handle_enum;
2043                 }
2044                 return mono_class_instance_size (klass) - sizeof (MonoObject);
2045         default:
2046                 g_error ("unknown type 0x%02x in mono_class_array_element_size", t);
2047         }
2048         return -1;
2049 }
2050
2051 /**
2052  * mono_array_element_size:
2053  * @ac: pointer to a #MonoArrayClass
2054  *
2055  * Returns: the size of single array element.
2056  */
2057 gint32
2058 mono_array_element_size (MonoClass *ac)
2059 {
2060         return mono_class_array_element_size (ac->element_class);
2061 }
2062
2063 gpointer
2064 mono_ldtoken (MonoImage *image, guint32 token, MonoClass **handle_class)
2065 {
2066         if (image->assembly->dynamic) {
2067                 gpointer obj = mono_lookup_dynamic_token (image, token);
2068
2069                 switch (token & 0xff000000) {
2070                 case MONO_TOKEN_TYPE_DEF:
2071                 case MONO_TOKEN_TYPE_REF:
2072                 case MONO_TOKEN_TYPE_SPEC:
2073                         if (handle_class)
2074                                 *handle_class = mono_defaults.typehandle_class;
2075                         return &((MonoClass*)obj)->byval_arg;
2076                 case MONO_TOKEN_METHOD_DEF:
2077                         if (handle_class)
2078                                 *handle_class = mono_defaults.methodhandle_class;
2079                         return obj;
2080                 case MONO_TOKEN_FIELD_DEF:
2081                         if (handle_class)
2082                                 *handle_class = mono_defaults.fieldhandle_class;
2083                         return obj;
2084                 default:
2085                         g_assert_not_reached ();
2086                 }
2087         }
2088
2089         switch (token & 0xff000000) {
2090         case MONO_TOKEN_TYPE_DEF:
2091         case MONO_TOKEN_TYPE_REF: {
2092                 MonoClass *class;
2093                 if (handle_class)
2094                         *handle_class = mono_defaults.typehandle_class;
2095                 class = mono_class_get (image, token);
2096                 mono_class_init (class);
2097                 /* We return a MonoType* as handle */
2098                 return &class->byval_arg;
2099         }
2100         case MONO_TOKEN_TYPE_SPEC: {
2101                 MonoClass *class;
2102                 if (handle_class)
2103                         *handle_class = mono_defaults.typehandle_class;
2104                 class = mono_class_create_from_typespec (image, token);
2105                 mono_class_init (class);
2106                 return &class->byval_arg;
2107         }
2108         case MONO_TOKEN_FIELD_DEF: {
2109                 MonoClass *class;
2110                 guint32 type = mono_metadata_typedef_from_field (image, mono_metadata_token_index (token));
2111                 class = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
2112                 mono_class_init (class);
2113                 if (handle_class)
2114                                 *handle_class = mono_defaults.fieldhandle_class;
2115                 return mono_class_get_field (class, token);
2116         }
2117         case MONO_TOKEN_METHOD_DEF:
2118         case MONO_TOKEN_MEMBER_REF:
2119         default:
2120                 g_warning ("Unknown token 0x%08x in ldtoken", token);
2121                 break;
2122         }
2123         return NULL;
2124 }
2125
2126 /**
2127  * This function might need to call runtime functions so it can't be part
2128  * of the metadata library.
2129  */
2130 static MonoLookupDynamicToken lookup_dynamic = NULL;
2131
2132 void
2133 mono_install_lookup_dynamic_token (MonoLookupDynamicToken func)
2134 {
2135         lookup_dynamic = func;
2136 }
2137
2138 gpointer
2139 mono_lookup_dynamic_token (MonoImage *image, guint32 token)
2140 {
2141         return lookup_dynamic (image, token);
2142 }