mono/metadata/loader.c

   1 /*
   2  * loader.c: Image Loader
   3  *
   4  * Authors:
   5  *   Paolo Molaro (lupus@ximian.com)
   6  *   Miguel de Icaza (miguel@ximian.com)
   7  *   Patrik Torstensson (patrik.torstensson@labs2.com)
   8  *
   9  * (C) 2001 Ximian, Inc.
  10  *
  11  * This file is used by the interpreter and the JIT engine to locate
  12  * assemblies.  Used to load AssemblyRef and later to resolve various
  13  * kinds of `Refs'.
  14  *
  15  * TODO:
  16  *   This should keep track of the assembly versions that we are loading.
  17  *
  18  */
  19 #include <config.h>
  20 #include <glib.h>
  21 #include <gmodule.h>
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <mono/metadata/metadata.h>
  26 #include <mono/metadata/image.h>
  27 #include <mono/metadata/assembly.h>
  28 #include <mono/metadata/tokentype.h>
  29 #include <mono/metadata/cil-coff.h>
  30 #include <mono/metadata/tabledefs.h>
  31 #include <mono/metadata/metadata-internals.h>
  32 #include <mono/metadata/loader.h>
  33 #include <mono/metadata/class-internals.h>
  34 #include <mono/metadata/debug-helpers.h>
  35 #include <mono/metadata/reflection.h>
  36 #include <mono/utils/mono-logger.h>
  37
  38 MonoDefaults mono_defaults;
  39
  40 /*
  41  * This lock protects the hash tables inside MonoImage used by the metadata
  42  * loading functions in class.c and loader.c.
  43  */
  44 static CRITICAL_SECTION loader_mutex;
  45
  46 void
  47 mono_loader_init ()
  48 {
  49         InitializeCriticalSection (&loader_mutex);
  50 }
  51
  52 static MonoClassField*
  53 field_from_memberref (MonoImage *image, guint32 token, MonoClass **retklass,
  54                       MonoGenericContext *context)
  55 {
  56         MonoClass *klass;
  57         MonoTableInfo *tables = image->tables;
  58         guint32 cols[6];
  59         guint32 nindex, class;
  60         const char *fname;
  61         const char *ptr;
  62         guint32 idx = mono_metadata_token_index (token);
  63
  64         if (image->dynamic) {
  65                 MonoClassField *result = mono_lookup_dynamic_token (image, token);
  66                 *retklass = result->parent;
  67                 return result;
  68         }
  69
  70         mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], idx-1, cols, MONO_MEMBERREF_SIZE);
  71         nindex = cols [MONO_MEMBERREF_CLASS] >> MONO_MEMBERREF_PARENT_BITS;
  72         class = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
  73
  74         fname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
  75
  76         ptr = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
  77         mono_metadata_decode_blob_size (ptr, &ptr);
  78         /* we may want to check the signature here... */
  79
  80         switch (class) {
  81         case MONO_MEMBERREF_PARENT_TYPEREF:
  82                 klass = mono_class_from_typeref (image, MONO_TOKEN_TYPE_REF | nindex);
  83                 if (!klass) {
  84                         g_warning ("Missing field %s in typeref index %d", fname, nindex);
  85                         return NULL;
  86                 }
  87                 mono_class_init (klass);
  88                 if (retklass)
  89                         *retklass = klass;
  90                 return mono_class_get_field_from_name (klass, fname);
  91         case MONO_MEMBERREF_PARENT_TYPESPEC: {
  92                 /*guint32 bcols [MONO_TYPESPEC_SIZE];
  93                 guint32 len;
  94                 MonoType *type;
  95
  96                 mono_metadata_decode_row (&tables [MONO_TABLE_TYPESPEC], nindex - 1,
  97                                           bcols, MONO_TYPESPEC_SIZE);
  98                 ptr = mono_metadata_blob_heap (image, bcols [MONO_TYPESPEC_SIGNATURE]);
  99                 len = mono_metadata_decode_value (ptr, &ptr);
 100                 type = mono_metadata_parse_type (image, MONO_PARSE_TYPE, 0, ptr, &ptr);
 101
 102                 klass = mono_class_from_mono_type (type);
 103                 mono_class_init (klass);
 104                 g_print ("type in sig: %s\n", klass->name);*/
 105                 klass = mono_class_get_full (image, MONO_TOKEN_TYPE_SPEC | nindex, context);
 106                 mono_class_init (klass);
 107                 if (retklass)
 108                         *retklass = klass;
 109                 return mono_class_get_field_from_name (klass, fname);
 110         }
 111         default:
 112                 g_warning ("field load from %x", class);
 113                 return NULL;
 114         }
 115 }
 116
 117 MonoClassField*
 118 mono_field_from_token (MonoImage *image, guint32 token, MonoClass **retklass,
 119                        MonoGenericContext *context)
 120 {
 121         MonoClass *k;
 122         guint32 type;
 123         MonoClassField *field;
 124
 125         if (image->dynamic) {
 126                 MonoClassField *result = mono_lookup_dynamic_token (image, token);
 127                 *retklass = result->parent;
 128                 return result;
 129         }
 130
 131         mono_loader_lock ();
 132         if ((field = g_hash_table_lookup (image->field_cache, GUINT_TO_POINTER (token)))) {
 133                 *retklass = field->parent;
 134                 mono_loader_unlock ();
 135                 return field;
 136         }
 137         mono_loader_unlock ();
 138
 139         if (mono_metadata_token_table (token) == MONO_TABLE_MEMBERREF)
 140                 field = field_from_memberref (image, token, retklass, context);
 141         else {
 142                 type = mono_metadata_typedef_from_field (image, mono_metadata_token_index (token));
 143                 if (!type)
 144                         return NULL;
 145                 k = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
 146                 mono_class_init (k);
 147                 if (!k)
 148                         return NULL;
 149                 if (retklass)
 150                         *retklass = k;
 151                 field = mono_class_get_field (k, token);
 152         }
 153
 154         mono_loader_lock ();
 155         if (!field->parent->generic_inst)
 156                 g_hash_table_insert (image->field_cache, GUINT_TO_POINTER (token), field);
 157         mono_loader_unlock ();
 158         return field;
 159 }
 160
 161 static gboolean
 162 mono_metadata_signature_vararg_match (MonoMethodSignature *sig1, MonoMethodSignature *sig2)
 163 {
 164         int i;
 165
 166         if (sig1->hasthis != sig2->hasthis ||
 167             sig1->sentinelpos != sig2->sentinelpos)
 168                 return FALSE;
 169
 170         for (i = 0; i < sig1->sentinelpos; i++) {
 171                 MonoType *p1 = sig1->params[i];
 172                 MonoType *p2 = sig2->params[i];
 173
 174                 /*if (p1->attrs != p2->attrs)
 175                         return FALSE;
 176                 */
 177                 if (!mono_metadata_type_equal (p1, p2))
 178                         return FALSE;
 179         }
 180
 181         if (!mono_metadata_type_equal (sig1->ret, sig2->ret))
 182                 return FALSE;
 183         return TRUE;
 184 }
 185
 186 static MonoMethod *
 187 find_method (MonoClass *klass, MonoClass *ic, const char* name, MonoMethodSignature *sig)
 188 {
 189         int i;
 190         MonoClass *sclass = klass;
 191         char *qname, *fqname;
 192
 193         if (ic) {
 194                 qname = g_strconcat (ic->name, ".", name, NULL);
 195                 if (ic->name_space && ic->name_space [0])
 196                         fqname = g_strconcat (ic->name_space, ".", ic->name, ".", name, NULL);
 197                 else
 198                         fqname = NULL;
 199         } else
 200                 qname = fqname = NULL;
 201
 202         while (klass) {
 203                 for (i = 0; i < klass->method.count; ++i) {
 204                         MonoMethod *m = klass->methods [i];
 205
 206                         if (!((fqname && !strcmp (m->name, fqname)) ||
 207                               (qname && !strcmp (m->name, qname)) || !strcmp (m->name, name)))
 208                                 continue;
 209
 210                         if (sig->call_convention == MONO_CALL_VARARG) {
 211                                 if (mono_metadata_signature_vararg_match (sig, m->signature))
 212                                         return m;
 213                         } else {
 214                                 if (mono_metadata_signature_equal (sig, m->signature))
 215                                         return m;
 216                         }
 217                 }
 218
 219                 if (name [0] == '.' && (strcmp (name, ".ctor") == 0 || strcmp (name, ".cctor") == 0))
 220                         break;
 221
 222                 klass = klass->parent;
 223         }
 224
 225         if (sclass->generic_inst) {
 226                 MonoClass *gclass;
 227                 MonoMethod *res;
 228
 229                 gclass = mono_class_from_mono_type (sclass->generic_inst->generic_type);
 230                 mono_class_init (gclass);
 231
 232                 res = find_method (gclass, ic, name, sig);
 233                 if (!res)
 234                         return NULL;
 235                 for (i = 0; i < res->klass->method.count; ++i) {
 236                         if (res == res->klass->methods [i]) {
 237                                 return sclass->methods [i];
 238                         }
 239                 }
 240         }
 241
 242         return NULL;
 243 }
 244
 245 /*
 246  * token is the method_ref or method_def token used in a call IL instruction.
 247  */
 248 MonoMethodSignature*
 249 mono_method_get_signature (MonoMethod *method, MonoImage *image, guint32 token)
 250 {
 251         int table = mono_metadata_token_table (token);
 252         int idx = mono_metadata_token_index (token);
 253         guint32 cols [MONO_MEMBERREF_SIZE];
 254         MonoMethodSignature *sig;
 255         const char *ptr;
 256
 257         /* !table is for wrappers: we should really assign their own token to them */
 258         if (!table || table == MONO_TABLE_METHOD)
 259                 return method->signature;
 260
 261         if (table == MONO_TABLE_METHODSPEC) {
 262                 g_assert (!(method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) &&
 263                           !(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) &&
 264                           method->signature);
 265                 g_assert (method->signature->is_inflated);
 266
 267                 return method->signature;
 268         }
 269
 270         if (method->klass->generic_inst)
 271                 return method->signature;
 272
 273         if (image->dynamic)
 274                 /* FIXME: This might be incorrect for vararg methods */
 275                 return method->signature;
 276
 277         if (!(sig = g_hash_table_lookup (image->memberref_signatures, GUINT_TO_POINTER (token)))) {
 278                 mono_metadata_decode_row (&image->tables [MONO_TABLE_MEMBERREF], idx-1, cols, MONO_MEMBERREF_SIZE);
 279
 280                 ptr = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
 281                 mono_metadata_decode_blob_size (ptr, &ptr);
 282                 sig = mono_metadata_parse_method_signature (image, 0, ptr, NULL);
 283                 g_hash_table_insert (image->memberref_signatures, GUINT_TO_POINTER (token), sig);
 284         }
 285
 286         return sig;
 287 }
 288
 289 static MonoMethod *
 290 method_from_memberref (MonoImage *image, guint32 idx, MonoGenericContext *context)
 291 {
 292         MonoClass *klass = NULL;
 293         MonoMethod *method;
 294         MonoTableInfo *tables = image->tables;
 295         guint32 cols[6];
 296         guint32 nindex, class;
 297         MonoGenericContainer *container = NULL;
 298         const char *mname;
 299         MonoMethodSignature *sig;
 300         const char *ptr;
 301
 302         mono_metadata_decode_row (&tables [MONO_TABLE_MEMBERREF], idx-1, cols, 3);
 303         nindex = cols [MONO_MEMBERREF_CLASS] >> MONO_MEMBERREF_PARENT_BITS;
 304         class = cols [MONO_MEMBERREF_CLASS] & MONO_MEMBERREF_PARENT_MASK;
 305         /*g_print ("methodref: 0x%x 0x%x %s\n", class, nindex,
 306                 mono_metadata_string_heap (m, cols [MONO_MEMBERREF_NAME]));*/
 307
 308         mname = mono_metadata_string_heap (image, cols [MONO_MEMBERREF_NAME]);
 309
 310         switch (class) {
 311         case MONO_MEMBERREF_PARENT_TYPEREF:
 312                 klass = mono_class_from_typeref (image, MONO_TOKEN_TYPE_REF | nindex);
 313                 if (!klass) {
 314                         g_warning ("Missing method %s in assembly %s typeref index %d", mname, image->name, nindex);
 315                         return NULL;
 316                 }
 317                 break;
 318         case MONO_MEMBERREF_PARENT_TYPESPEC:
 319                 klass = mono_class_get_full (image, MONO_TOKEN_TYPE_SPEC | nindex, context);
 320                 if (!klass) {
 321                         g_warning ("Missing method %s in assembly %s typespec index %d", mname, image->name, nindex);
 322                         return NULL;
 323                 }
 324                 break;
 325         case MONO_MEMBERREF_PARENT_TYPEDEF:
 326                 klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | nindex);
 327                 if (!klass) {
 328                         g_warning ("Missing method %s in assembly %s typedef index %d", mname, image->name, nindex);
 329                         return NULL;
 330                 }
 331                 break;
 332         case MONO_MEMBERREF_PARENT_METHODDEF:
 333                 return mono_get_method (image, MONO_TOKEN_METHOD_DEF | nindex, NULL);
 334         default:
 335                 g_error ("Memberref parent unknown: class: %d, index %d", class, nindex);
 336                 g_assert_not_reached ();
 337         }
 338         g_assert (klass);
 339         mono_class_init (klass);
 340
 341         if (klass->generic_container)
 342                 container = klass->generic_container;
 343         else if (klass->generic_inst) {
 344                 g_assert (klass->generic_inst->container);
 345                 container = klass->generic_inst->container;
 346         }
 347
 348         ptr = mono_metadata_blob_heap (image, cols [MONO_MEMBERREF_SIGNATURE]);
 349         mono_metadata_decode_blob_size (ptr, &ptr);
 350         sig = mono_metadata_parse_method_signature_full (image, container, 0, ptr, NULL);
 351
 352         switch (class) {
 353         case MONO_MEMBERREF_PARENT_TYPEREF:
 354                 method = find_method (klass, NULL, mname, sig);
 355                 if (!method)
 356                         g_warning ("Missing method %s in assembly %s typeref index %d", mname, image->name, nindex);
 357                 mono_metadata_free_method_signature (sig);
 358                 return method;
 359         case MONO_MEMBERREF_PARENT_TYPESPEC: {
 360                 MonoType *type;
 361                 MonoMethod *result;
 362
 363                 type = &klass->byval_arg;
 364
 365                 if (type->type != MONO_TYPE_ARRAY && type->type != MONO_TYPE_SZARRAY) {
 366                         method = find_method (klass, NULL, mname, sig);
 367                         if (!method)
 368                                 g_warning ("Missing method %s in assembly %s typeref index %d", mname, image->name, nindex);
 369                         else if (klass->generic_inst && (klass != method->klass))
 370                                 method = mono_class_inflate_generic_method (
 371                                         method, klass->generic_inst->context, klass);
 372                         mono_metadata_free_method_signature (sig);
 373                         return method;
 374                 }
 375
 376                 result = (MonoMethod *)g_new0 (MonoMethodPInvoke, 1);
 377                 result->klass = mono_class_get (image, MONO_TOKEN_TYPE_SPEC | nindex);
 378                 result->iflags = METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL;
 379                 result->signature = sig;
 380                 result->name = mname;
 381
 382                 if (!strcmp (mname, ".ctor")) {
 383                         /* we special-case this in the runtime. */
 384                         result->addr = NULL;
 385                         return result;
 386                 }
 387
 388                 if (!strcmp (mname, "Set")) {
 389                         g_assert (sig->hasthis);
 390                         g_assert (type->data.array->rank + 1 == sig->param_count);
 391                         result->iflags |= METHOD_IMPL_ATTRIBUTE_RUNTIME;
 392                         result->addr = NULL;
 393                         return result;
 394                 }
 395
 396                 if (!strcmp (mname, "Get")) {
 397                         g_assert (sig->hasthis);
 398                         g_assert (type->data.array->rank == sig->param_count);
 399                         result->iflags |= METHOD_IMPL_ATTRIBUTE_RUNTIME;
 400                         result->addr = NULL;
 401                         return result;
 402                 }
 403
 404                 if (!strcmp (mname, "Address")) {
 405                         g_assert (sig->hasthis);
 406                         g_assert (type->data.array->rank == sig->param_count);
 407                         result->iflags |= METHOD_IMPL_ATTRIBUTE_RUNTIME;
 408                         result->addr = NULL;
 409                         return result;
 410                 }
 411
 412                 g_assert_not_reached ();
 413                 break;
 414         }
 415         case MONO_MEMBERREF_PARENT_TYPEDEF:
 416                 method = find_method (klass, NULL, mname, sig);
 417                 if (!method)
 418                         g_warning ("Missing method %s in assembly %s typeref index %d", mname, image->name, nindex);
 419                 mono_metadata_free_method_signature (sig);
 420                 return method;
 421         default:
 422                 g_error ("Memberref parent unknown: class: %d, index %d", class, nindex);
 423                 g_assert_not_reached ();
 424         }
 425
 426         return NULL;
 427 }
 428
 429 static MonoMethod *
 430 method_from_methodspec (MonoImage *image, MonoGenericContainer *generic_container, guint32 idx)
 431 {
 432         MonoMethod *method, *inflated;
 433         MonoTableInfo *tables = image->tables;
 434         MonoGenericContext *context;
 435         MonoGenericMethod *gmethod;
 436         MonoGenericContainer *container = NULL;
 437         const char *ptr;
 438         guint32 cols [MONO_METHODSPEC_SIZE];
 439         guint32 token, param_count, i;
 440
 441         mono_metadata_decode_row (&tables [MONO_TABLE_METHODSPEC], idx - 1, cols, MONO_METHODSPEC_SIZE);
 442         token = cols [MONO_METHODSPEC_METHOD];
 443         if ((token & MONO_METHODDEFORREF_MASK) == MONO_METHODDEFORREF_METHODDEF)
 444                 token = MONO_TOKEN_METHOD_DEF | (token >> MONO_METHODDEFORREF_BITS);
 445         else
 446                 token = MONO_TOKEN_MEMBER_REF | (token >> MONO_METHODDEFORREF_BITS);
 447
 448         method = mono_get_method (image, token, NULL);
 449
 450         ptr = mono_metadata_blob_heap (image, cols [MONO_METHODSPEC_SIGNATURE]);
 451
 452         mono_metadata_decode_value (ptr, &ptr);
 453         ptr++;
 454         param_count = mono_metadata_decode_value (ptr, &ptr);
 455
 456         g_assert (param_count);
 457         if (method->signature->is_inflated)
 458                 container = ((MonoMethodNormal *) ((MonoMethodInflated *) method)->declaring)->generic_container;
 459         else
 460                 container = ((MonoMethodNormal *) method)->generic_container;
 461         g_assert (container && container->method);
 462         if (generic_container)
 463                 container->parent = generic_container;
 464
 465         gmethod = g_new0 (MonoGenericMethod, 1);
 466         gmethod->container = container;
 467         gmethod->mtype_argc = param_count;
 468         gmethod->mtype_argv = g_new0 (MonoType *, param_count);
 469
 470         for (i = 0; i < param_count; i++) {
 471                 gmethod->mtype_argv [i] = mono_metadata_parse_type_full (
 472                         image, container, MONO_PARSE_TYPE, 0, ptr, &ptr);
 473
 474                 if (!gmethod->is_open)
 475                         gmethod->is_open = mono_class_is_open_constructed_type (gmethod->mtype_argv [i]);
 476         }
 477
 478         context = g_new0 (MonoGenericContext, 1);
 479         context->gmethod = gmethod;
 480
 481         mono_stats.generics_metadata_size += sizeof (MonoGenericMethod) +
 482                 sizeof (MonoGenericContext) + param_count * sizeof (MonoType);
 483
 484         inflated = mono_class_inflate_generic_method (method, context, NULL);
 485
 486         context->ginst = inflated->klass->generic_inst;
 487         return inflated;
 488 }
 489
 490 typedef struct MonoDllMap MonoDllMap;
 491
 492 struct MonoDllMap {
 493         char *name;
 494         char *target;
 495         char *dll;
 496         MonoDllMap *next;
 497 };
 498
 499 static GHashTable *global_dll_map;
 500
 501 static int
 502 mono_dllmap_lookup_hash (GHashTable *dll_map, const char *dll, const char* func, const char **rdll, const char **rfunc) {
 503         MonoDllMap *map, *tmp;
 504
 505         *rdll = dll;
 506
 507         if (!dll_map)
 508                 return 0;
 509
 510         mono_loader_lock ();
 511
 512         map = g_hash_table_lookup (dll_map, dll);
 513         if (!map) {
 514                 mono_loader_unlock ();
 515                 return 0;
 516         }
 517         *rdll = map->target? map->target: dll;
 518
 519         for (tmp = map->next; tmp; tmp = tmp->next) {
 520                 if (strcmp (func, tmp->name) == 0) {
 521                         *rfunc = tmp->name;
 522                         if (tmp->dll)
 523                                 *rdll = tmp->dll;
 524                         mono_loader_unlock ();
 525                         return 1;
 526                 }
 527         }
 528         *rfunc = func;
 529         mono_loader_unlock ();
 530         return 1;
 531 }
 532
 533 static int
 534 mono_dllmap_lookup (MonoImage *assembly, const char *dll, const char* func, const char **rdll, const char **rfunc)
 535 {
 536         int res;
 537         if (assembly && assembly->dll_map) {
 538                 res = mono_dllmap_lookup_hash (assembly->dll_map, dll, func, rdll, rfunc);
 539                 if (res)
 540                         return res;
 541         }
 542         return mono_dllmap_lookup_hash (global_dll_map, dll, func, rdll, rfunc);
 543 }
 544
 545 void
 546 mono_dllmap_insert (MonoImage *assembly, const char *dll, const char *func, const char *tdll, const char *tfunc) {
 547         MonoDllMap *map, *entry;
 548         GHashTable *dll_map = NULL;
 549
 550         mono_loader_lock ();
 551
 552         if (!assembly) {
 553                 if (!global_dll_map)
 554                         global_dll_map = g_hash_table_new (g_str_hash, g_str_equal);
 555                 dll_map = global_dll_map;
 556         } else {
 557                 if (!assembly->dll_map)
 558                         assembly->dll_map = g_hash_table_new (g_str_hash, g_str_equal);
 559                 dll_map = assembly->dll_map;
 560         }
 561
 562         map = g_hash_table_lookup (dll_map, dll);
 563         if (!map) {
 564                 map = g_new0 (MonoDllMap, 1);
 565                 map->dll = g_strdup (dll);
 566                 if (tdll)
 567                         map->target = g_strdup (tdll);
 568                 g_hash_table_insert (dll_map, map->dll, map);
 569         }
 570         if (func) {
 571                 entry = g_new0 (MonoDllMap, 1);
 572                 entry->name = g_strdup (func);
 573                 if (tfunc)
 574                         entry->target = g_strdup (tfunc);
 575                 if (tdll && map->target && strcmp (map->target, tdll))
 576                         entry->dll = g_strdup (tdll);
 577                 entry->next = map->next;
 578                 map->next = entry;
 579         }
 580
 581         mono_loader_unlock ();
 582 }
 583
 584 gpointer
 585 mono_lookup_pinvoke_call (MonoMethod *method, const char **exc_class, const char **exc_arg)
 586 {
 587         MonoImage *image = method->klass->image;
 588         MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)method;
 589         MonoTableInfo *tables = image->tables;
 590         MonoTableInfo *im = &tables [MONO_TABLE_IMPLMAP];
 591         MonoTableInfo *mr = &tables [MONO_TABLE_MODULEREF];
 592         guint32 im_cols [MONO_IMPLMAP_SIZE];
 593         guint32 scope_token;
 594         const char *import = NULL;
 595         const char *orig_scope;
 596         const char *new_scope;
 597         char *full_name, *file_name;
 598         int i;
 599         GModule *gmodule = NULL;
 600
 601         g_assert (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL);
 602
 603         if (method->addr)
 604                 return method->addr;
 605
 606         if (method->klass->image->dynamic) {
 607                 MonoReflectionMethodAux *method_aux =
 608                         mono_g_hash_table_lookup (
 609                                 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
 610                 if (!method_aux)
 611                         return NULL;
 612
 613                 import = method_aux->dllentry;
 614                 orig_scope = method_aux->dll;
 615         }
 616         else {
 617                 if (!piinfo->implmap_idx)
 618                         return NULL;
 619
 620                 mono_metadata_decode_row (im, piinfo->implmap_idx - 1, im_cols, MONO_IMPLMAP_SIZE);
 621
 622                 piinfo->piflags = im_cols [MONO_IMPLMAP_FLAGS];
 623                 import = mono_metadata_string_heap (image, im_cols [MONO_IMPLMAP_NAME]);
 624                 scope_token = mono_metadata_decode_row_col (mr, im_cols [MONO_IMPLMAP_SCOPE] - 1, MONO_MODULEREF_NAME);
 625                 orig_scope = mono_metadata_string_heap (image, scope_token);
 626         }
 627
 628         mono_dllmap_lookup (image, orig_scope, import, &new_scope, &import);
 629
 630         mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
 631                         "DllImport attempting to load: '%s'.", new_scope);
 632
 633         if (exc_class) {
 634                 *exc_class = NULL;
 635                 *exc_arg = NULL;
 636         }
 637
 638         /*
 639          * Try loading the module using a variety of names
 640          */
 641         for (i = 0; i < 3; ++i) {
 642                 switch (i) {
 643                 case 0:
 644                         /* Try the original name */
 645                         file_name = g_strdup (new_scope);
 646                         break;
 647                 case 1:
 648                         /* Try trimming the .dll extension */
 649                         if (strstr (new_scope, ".dll") == (new_scope + strlen (new_scope) - 4)) {
 650                                 file_name = g_strdup (new_scope);
 651                                 file_name [strlen (new_scope) - 4] = '\0';
 652                         }
 653                         else
 654                                 continue;
 655                         break;
 656                 default:
 657                         if (strstr (new_scope, "lib") != new_scope) {
 658                                 file_name = g_strdup_printf ("lib%s", new_scope);
 659                         }
 660                         else
 661                                 continue;
 662                         break;
 663                 }
 664
 665                 if (!gmodule) {
 666                         full_name = g_module_build_path (NULL, file_name);
 667                         mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
 668                                         "DllImport loading location: '%s'.", full_name);
 669                         gmodule = g_module_open (full_name, G_MODULE_BIND_LAZY);
 670                         if (!gmodule) {
 671                                 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
 672                                                 "DllImport error loading library: '%s'.",
 673                                                 g_module_error ());
 674                         }
 675                         g_free (full_name);
 676                 }
 677
 678                 if (!gmodule) {
 679                         full_name = g_module_build_path (".", file_name);
 680                         mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
 681                                         "DllImport loading library: '%s'.", full_name);
 682                         gmodule = g_module_open (full_name, G_MODULE_BIND_LAZY);
 683                         if (!gmodule) {
 684                                 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
 685                                                 "DllImport error loading library '%s'.",
 686                                                 g_module_error ());
 687                         }
 688                         g_free (full_name);
 689                 }
 690
 691                 if (!gmodule) {
 692                         mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
 693                                         "DllImport loading: '%s'.", file_name);
 694                         gmodule=g_module_open (file_name, G_MODULE_BIND_LAZY);
 695                         if (!gmodule) {
 696                                 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_DLLIMPORT,
 697                                                 "DllImport error loading library '%s'.",
 698                                                 g_module_error ());
 699                         }
 700                 }
 701
 702                 g_free (file_name);
 703
 704                 if (gmodule)
 705                         break;
 706         }
 707
 708         if (!gmodule) {
 709                 mono_trace (G_LOG_LEVEL_WARNING, MONO_TRACE_DLLIMPORT,
 710                                 "DllImport unable to load library '%s'.",
 711                                 g_module_error ());
 712
 713                 if (exc_class) {
 714                         *exc_class = "DllNotFoundException";
 715                         *exc_arg = orig_scope;
 716                 }
 717                 return NULL;
 718         }
 719
 720         if (piinfo->piflags & PINVOKE_ATTRIBUTE_NO_MANGLE) {
 721                 g_module_symbol (gmodule, import, &method->addr);
 722         } else {
 723                 char *mangled_name;
 724
 725                 switch (piinfo->piflags & PINVOKE_ATTRIBUTE_CHAR_SET_MASK) {
 726                 case PINVOKE_ATTRIBUTE_CHAR_SET_UNICODE:
 727                         mangled_name = g_strconcat (import, "W", NULL);
 728                         g_module_symbol (gmodule, mangled_name, &method->addr);
 729                         g_free (mangled_name);
 730
 731                         if (!method->addr)
 732                                 g_module_symbol (gmodule, import, &method->addr);
 733                         break;
 734                 case PINVOKE_ATTRIBUTE_CHAR_SET_AUTO:
 735                         g_module_symbol (gmodule, import, &method->addr);
 736                         break;
 737                 case PINVOKE_ATTRIBUTE_CHAR_SET_ANSI:
 738                 default:
 739                         mangled_name = g_strconcat (import, "A", NULL);
 740                         g_module_symbol (gmodule, mangled_name, &method->addr);
 741                         g_free (mangled_name);
 742
 743                         if (!method->addr)
 744                                 g_module_symbol (gmodule, import, &method->addr);
 745
 746                         break;
 747                 }
 748
 749 #ifdef PLATFORM_WIN32
 750                 /* Try the stdcall mangled name */
 751                 if (!method->addr) {
 752                         /* FIX: Compute this correctly */
 753                         mangled_name = g_strdup_printf ("%s@%d", import, method->signature->param_count * sizeof (gpointer));
 754                         g_module_symbol (gmodule, mangled_name, &method->addr);
 755                         g_free (mangled_name);
 756                 }
 757                 if (!method->addr) {
 758                         mangled_name = g_strdup_printf ("_%s@%d", import, method->signature->param_count * sizeof (gpointer));
 759                         g_module_symbol (gmodule, mangled_name, &method->addr);
 760                         g_free (mangled_name);
 761                 }
 762 #endif
 763         }
 764
 765         if (!method->addr) {
 766                 if (exc_class) {
 767                         *exc_class = "EntryPointNotFoundException";
 768                         *exc_arg = import;
 769                 }
 770                 return NULL;
 771         }
 772         return method->addr;
 773 }
 774
 775 static MonoMethod *
 776 mono_get_method_from_token (MonoImage *image, guint32 token, MonoClass *klass,
 777                             MonoGenericContext *context)
 778 {
 779         MonoMethod *result;
 780         int table = mono_metadata_token_table (token);
 781         int idx = mono_metadata_token_index (token);
 782         MonoTableInfo *tables = image->tables;
 783         MonoGenericContainer *generic_container = NULL, *container = NULL;
 784         const char *loc, *sig = NULL;
 785         int size, i;
 786         guint32 cols [MONO_TYPEDEF_SIZE];
 787
 788         if (image->dynamic)
 789                 return mono_lookup_dynamic_token (image, token);
 790
 791         if (table != MONO_TABLE_METHOD) {
 792                 MonoGenericContainer *generic_container = NULL;
 793                 if (context) {
 794                         if (context->ginst) {
 795                                 g_assert (context->ginst->container);
 796                                 generic_container = context->ginst->container;
 797                         } else
 798                                 generic_container = context->container;
 799                 }
 800                 if (table == MONO_TABLE_METHODSPEC)
 801                         return method_from_methodspec (image, generic_container, idx);
 802                 if (table != MONO_TABLE_MEMBERREF)
 803                         g_print("got wrong token: 0x%08x\n", token);
 804                 g_assert (table == MONO_TABLE_MEMBERREF);
 805                 result = method_from_memberref (image, idx, context);
 806
 807                 return result;
 808         }
 809
 810         mono_metadata_decode_row (&tables [table], idx - 1, cols, 6);
 811
 812         if ((cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
 813             (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL))
 814                 result = (MonoMethod *)g_new0 (MonoMethodPInvoke, 1);
 815         else
 816                 result = (MonoMethod *)g_new0 (MonoMethodNormal, 1);
 817
 818         result->slot = -1;
 819         result->klass = klass;
 820         result->flags = cols [2];
 821         result->iflags = cols [1];
 822         result->token = token;
 823         result->name = mono_metadata_string_heap (image, cols [3]);
 824
 825         if (klass)
 826                 container = klass->generic_container;
 827
 828         if (!(cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) &&
 829             (!(cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) || cols [1] & METHOD_IMPL_ATTRIBUTE_NATIVE)) {
 830                 generic_container = mono_metadata_load_generic_params (image, token);
 831                 if (generic_container) {
 832                         generic_container->parent = container;
 833                         generic_container->method = result;
 834                         container = generic_container;
 835                 }
 836         }
 837
 838         if (!sig) /* already taken from the methodref */
 839                 sig = mono_metadata_blob_heap (image, cols [4]);
 840         size = mono_metadata_decode_blob_size (sig, &sig);
 841         result->signature = mono_metadata_parse_method_signature_full (image, container, idx, sig, NULL);
 842
 843         if (!result->klass) {
 844                 guint32 type = mono_metadata_typedef_from_method (image, token);
 845                 result->klass = mono_class_get (image, MONO_TOKEN_TYPE_DEF | type);
 846         }
 847
 848         if (cols [1] & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) {
 849                 if (result->klass == mono_defaults.string_class && !strcmp (result->name, ".ctor"))
 850                         result->string_ctor = 1;
 851
 852                 result->signature->pinvoke = 1;
 853         } else if ((cols [2] & METHOD_ATTRIBUTE_PINVOKE_IMPL) && (!(cols [1] & METHOD_IMPL_ATTRIBUTE_NATIVE))) {
 854                 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)result;
 855                 MonoTableInfo *im = &tables [MONO_TABLE_IMPLMAP];
 856                 MonoCallConvention conv = 0;
 857
 858                 result->signature->pinvoke = 1;
 859                 piinfo->implmap_idx = mono_metadata_implmap_from_method (image, idx - 1);
 860                 piinfo->piflags = mono_metadata_decode_row_col (im, piinfo->implmap_idx - 1, MONO_IMPLMAP_FLAGS);
 861
 862                 switch (piinfo->piflags & PINVOKE_ATTRIBUTE_CALL_CONV_MASK) {
 863                 case PINVOKE_ATTRIBUTE_CALL_CONV_WINAPI:
 864                         conv = MONO_CALL_DEFAULT;
 865                         break;
 866                 case PINVOKE_ATTRIBUTE_CALL_CONV_CDECL:
 867                         conv = MONO_CALL_C;
 868                         break;
 869                 case PINVOKE_ATTRIBUTE_CALL_CONV_STDCALL:
 870                         conv = MONO_CALL_STDCALL;
 871                         break;
 872                 case PINVOKE_ATTRIBUTE_CALL_CONV_THISCALL:
 873                         conv = MONO_CALL_THISCALL;
 874                         break;
 875                 case PINVOKE_ATTRIBUTE_CALL_CONV_FASTCALL:
 876                         conv = MONO_CALL_FASTCALL;
 877                         break;
 878                 case PINVOKE_ATTRIBUTE_CALL_CONV_GENERIC:
 879                 case PINVOKE_ATTRIBUTE_CALL_CONV_GENERICINST:
 880                 default:
 881                         g_warning ("unsupported calling convention");
 882                         g_assert_not_reached ();
 883                 }
 884                 result->signature->call_convention = conv;
 885         } else {
 886                 MonoMethodNormal *mn = (MonoMethodNormal *) result;
 887
 888                 /* if this is a methodref from another module/assembly, this fails */
 889                 loc = mono_image_rva_map (image, cols [0]);
 890
 891                 if (result->signature->generic_param_count) {
 892                         MonoMethodSignature *sig = result->signature;
 893
 894                         for (i = 0; i < sig->generic_param_count; i++) {
 895                                 generic_container->type_params [i].method = result;
 896
 897                                 mono_class_from_generic_parameter (
 898                                         &generic_container->type_params [i], image, TRUE);
 899                         }
 900
 901                         if (sig->ret->type == MONO_TYPE_MVAR) {
 902                                 int num = sig->ret->data.generic_param->num;
 903                                 sig->ret->data.generic_param = &generic_container->type_params [num];
 904                         }
 905
 906                         for (i = 0; i < sig->param_count; i++) {
 907                                 MonoType *t = sig->params [i];
 908                                 if (t->type == MONO_TYPE_MVAR) {
 909                                         int num = t->data.generic_param->num;
 910                                         sig->params [i]->data.generic_param = &generic_container->type_params [num];
 911                                 }
 912                         }
 913                 }
 914
 915                 if (!result->klass->dummy && !(result->flags & METHOD_ATTRIBUTE_ABSTRACT) &&
 916                     !(result->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME)) {
 917                         g_assert (loc);
 918                         mn->header = mono_metadata_parse_mh_full (image, container, loc);
 919                 }
 920
 921                 mn->generic_container = generic_container;
 922         }
 923
 924         return result;
 925 }
 926
 927 MonoMethod *
 928 mono_get_method (MonoImage *image, guint32 token, MonoClass *klass)
 929 {
 930         return mono_get_method_full (image, token, klass, NULL);
 931 }
 932
 933 MonoMethod *
 934 mono_get_method_full (MonoImage *image, guint32 token, MonoClass *klass,
 935                       MonoGenericContext *context)
 936 {
 937         MonoMethod *result;
 938
 939         /* We do everything inside the lock to prevent creation races */
 940
 941         mono_loader_lock ();
 942
 943         if ((result = g_hash_table_lookup (image->method_cache, GINT_TO_POINTER (token)))) {
 944                 mono_loader_unlock ();
 945                 return result;
 946         }
 947
 948         result = mono_get_method_from_token (image, token, klass, context);
 949
 950         if (!(result && result->signature->is_inflated))
 951                 g_hash_table_insert (image->method_cache, GINT_TO_POINTER (token), result);
 952
 953         mono_loader_unlock ();
 954
 955         return result;
 956 }
 957
 958 MonoMethod *
 959 mono_get_method_constrained (MonoImage *image, guint32 token, MonoClass *constrained_class,
 960                              MonoGenericContext *context)
 961 {
 962         MonoMethod *method, *result;
 963         MonoClass *ic = NULL;
 964
 965         mono_loader_lock ();
 966
 967         method = mono_get_method_from_token (image, token, NULL, context);
 968         if (!method) {
 969                 mono_loader_unlock ();
 970                 return NULL;
 971         }
 972
 973         mono_class_init (constrained_class);
 974
 975         if ((constrained_class != method->klass) && (method->klass->interface_id != 0))
 976                 ic = method->klass;
 977
 978         result = find_method (constrained_class, ic, method->name, method->signature);
 979         if (!result)
 980                 g_warning ("Missing method %s in assembly %s token %x", method->name,
 981                            image->name, token);
 982
 983         mono_loader_unlock ();
 984         return result;
 985 }
 986
 987 void
 988 mono_free_method  (MonoMethod *method)
 989 {
 990         mono_metadata_free_method_signature (method->signature);
 991         if (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) {
 992                 MonoMethodPInvoke *piinfo = (MonoMethodPInvoke *)method;
 993                 g_free (piinfo->code);
 994         } else if (!(method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)) {
 995                 mono_metadata_free_mh (((MonoMethodNormal *)method)->header);
 996         }
 997
 998         g_free (method);
 999 }
1000
1001 void
1002 mono_method_get_param_names (MonoMethod *method, const char **names)
1003 {
1004         int i, lastp;
1005         MonoClass *klass = method->klass;
1006         MonoTableInfo *methodt;
1007         MonoTableInfo *paramt;
1008
1009         if (!method->signature->param_count)
1010                 return;
1011         for (i = 0; i < method->signature->param_count; ++i)
1012                 names [i] = "";
1013
1014         if (klass->generic_inst) /* copy the names later */
1015                 return;
1016
1017         mono_class_init (klass);
1018
1019         if (klass->image->dynamic) {
1020                 MonoReflectionMethodAux *method_aux =
1021                         mono_g_hash_table_lookup (
1022                                 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
1023                 if (method_aux && method_aux->param_names) {
1024                         for (i = 0; i < method->signature->param_count; ++i)
1025                                 if (method_aux->param_names [i + 1])
1026                                         names [i] = method_aux->param_names [i + 1];
1027                 }
1028                 return;
1029         }
1030
1031         methodt = &klass->image->tables [MONO_TABLE_METHOD];
1032         paramt = &klass->image->tables [MONO_TABLE_PARAM];
1033         for (i = 0; i < klass->method.count; ++i) {
1034                 if (method == klass->methods [i]) {
1035                         guint32 idx = klass->method.first + i;
1036                         guint32 cols [MONO_PARAM_SIZE];
1037                         guint param_index = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
1038
1039                         if (idx + 1 < methodt->rows)
1040                                 lastp = mono_metadata_decode_row_col (methodt, idx + 1, MONO_METHOD_PARAMLIST);
1041                         else
1042                                 lastp = paramt->rows + 1;
1043                         for (i = param_index; i < lastp; ++i) {
1044                                 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
1045                                 if (cols [MONO_PARAM_SEQUENCE]) /* skip return param spec */
1046                                         names [cols [MONO_PARAM_SEQUENCE] - 1] = mono_metadata_string_heap (klass->image, cols [MONO_PARAM_NAME]);
1047                         }
1048                         return;
1049                 }
1050         }
1051 }
1052
1053 guint32
1054 mono_method_get_param_token (MonoMethod *method, int index)
1055 {
1056         int i;
1057         MonoClass *klass = method->klass;
1058         MonoTableInfo *methodt;
1059
1060         if (klass->generic_inst)
1061                 g_assert_not_reached ();
1062
1063         mono_class_init (klass);
1064
1065         if (klass->image->dynamic) {
1066                 g_assert_not_reached ();
1067         }
1068
1069         methodt = &klass->image->tables [MONO_TABLE_METHOD];
1070         for (i = 0; i < klass->method.count; ++i) {
1071                 if (method == klass->methods [i]) {
1072                         guint32 idx = klass->method.first + i;
1073                         guint param_index = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
1074
1075                         return mono_metadata_make_token (MONO_TABLE_PARAM, param_index + index);
1076                 }
1077         }
1078
1079         return 0;
1080 }
1081
1082 void
1083 mono_method_get_marshal_info (MonoMethod *method, MonoMarshalSpec **mspecs)
1084 {
1085         int i, lastp;
1086         MonoClass *klass = method->klass;
1087         MonoTableInfo *methodt;
1088         MonoTableInfo *paramt;
1089
1090         for (i = 0; i < method->signature->param_count + 1; ++i)
1091                 mspecs [i] = NULL;
1092
1093         if (method->klass->image->dynamic) {
1094                 MonoReflectionMethodAux *method_aux =
1095                         mono_g_hash_table_lookup (
1096                                 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
1097                 if (method_aux && method_aux->param_marshall) {
1098                         MonoMarshalSpec **dyn_specs = method_aux->param_marshall;
1099                         for (i = 0; i < method->signature->param_count + 1; ++i)
1100                                 if (dyn_specs [i]) {
1101                                         mspecs [i] = g_new0 (MonoMarshalSpec, 1);
1102                                         memcpy (mspecs [i], dyn_specs [i], sizeof (MonoMarshalSpec));
1103                                 }
1104                 }
1105                 return;
1106         }
1107
1108         mono_class_init (klass);
1109
1110         methodt = &klass->image->tables [MONO_TABLE_METHOD];
1111         paramt = &klass->image->tables [MONO_TABLE_PARAM];
1112
1113         for (i = 0; i < klass->method.count; ++i) {
1114                 if (method == klass->methods [i]) {
1115                         guint32 idx = klass->method.first + i;
1116                         guint32 cols [MONO_PARAM_SIZE];
1117                         guint param_index = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
1118
1119                         if (idx + 1 < methodt->rows)
1120                                 lastp = mono_metadata_decode_row_col (methodt, idx + 1, MONO_METHOD_PARAMLIST);
1121                         else
1122                                 lastp = paramt->rows + 1;
1123
1124                         for (i = param_index; i < lastp; ++i) {
1125                                 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
1126
1127                                 if (cols [MONO_PARAM_FLAGS] & PARAM_ATTRIBUTE_HAS_FIELD_MARSHAL) {
1128                                         const char *tp;
1129                                         tp = mono_metadata_get_marshal_info (klass->image, i - 1, FALSE);
1130                                         g_assert (tp);
1131                                         mspecs [cols [MONO_PARAM_SEQUENCE]]= mono_metadata_parse_marshal_spec (klass->image, tp);
1132                                 }
1133                         }
1134
1135                         return;
1136                 }
1137         }
1138 }
1139
1140 gboolean
1141 mono_method_has_marshal_info (MonoMethod *method)
1142 {
1143         int i, lastp;
1144         MonoClass *klass = method->klass;
1145         MonoTableInfo *methodt;
1146         MonoTableInfo *paramt;
1147
1148         if (method->klass->image->dynamic) {
1149                 MonoReflectionMethodAux *method_aux =
1150                         mono_g_hash_table_lookup (
1151                                 ((MonoDynamicImage*)method->klass->image)->method_aux_hash, method);
1152                 MonoMarshalSpec **dyn_specs = method_aux->param_marshall;
1153                 if (dyn_specs) {
1154                         for (i = 0; i < method->signature->param_count + 1; ++i)
1155                                 if (dyn_specs [i])
1156                                         return TRUE;
1157                 }
1158                 return FALSE;
1159         }
1160
1161         mono_class_init (klass);
1162
1163         methodt = &klass->image->tables [MONO_TABLE_METHOD];
1164         paramt = &klass->image->tables [MONO_TABLE_PARAM];
1165
1166         for (i = 0; i < klass->method.count; ++i) {
1167                 if (method == klass->methods [i]) {
1168                         guint32 idx = klass->method.first + i;
1169                         guint32 cols [MONO_PARAM_SIZE];
1170                         guint param_index = mono_metadata_decode_row_col (methodt, idx, MONO_METHOD_PARAMLIST);
1171
1172                         if (idx + 1 < methodt->rows)
1173                                 lastp = mono_metadata_decode_row_col (methodt, idx + 1, MONO_METHOD_PARAMLIST);
1174                         else
1175                                 lastp = paramt->rows + 1;
1176
1177                         for (i = param_index; i < lastp; ++i) {
1178                                 mono_metadata_decode_row (paramt, i -1, cols, MONO_PARAM_SIZE);
1179
1180                                 if (cols [MONO_PARAM_FLAGS] & PARAM_ATTRIBUTE_HAS_FIELD_MARSHAL)
1181                                         return TRUE;
1182                         }
1183                         return FALSE;
1184                 }
1185         }
1186         return FALSE;
1187 }
1188
1189 gpointer
1190 mono_method_get_wrapper_data (MonoMethod *method, guint32 id)
1191 {
1192         GList *l;
1193         g_assert (method != NULL);
1194         g_assert (method->wrapper_type != MONO_WRAPPER_NONE);
1195
1196         if (!(l = g_list_nth (((MonoMethodWrapper *)method)->data, id - 1)))
1197                 g_assert_not_reached ();
1198
1199         return l->data;
1200 }
1201
1202 static void
1203 default_stack_walk (MonoStackWalk func, gboolean do_il_offset, gpointer user_data) {
1204         g_error ("stack walk not installed");
1205 }
1206
1207 static MonoStackWalkImpl stack_walk = default_stack_walk;
1208
1209 void
1210 mono_stack_walk (MonoStackWalk func, gpointer user_data)
1211 {
1212         stack_walk (func, FALSE, user_data);
1213 }
1214
1215 void
1216 mono_stack_walk_no_il (MonoStackWalk func, gpointer user_data)
1217 {
1218         stack_walk (func, TRUE, user_data);
1219 }
1220
1221 void
1222 mono_install_stack_walk (MonoStackWalkImpl func)
1223 {
1224         stack_walk = func;
1225 }
1226
1227 static gboolean
1228 last_managed (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
1229 {
1230         MonoMethod **dest = data;
1231         *dest = m;
1232         /*g_print ("In %s::%s [%d] [%d]\n", m->klass->name, m->name, no, ilo);*/
1233
1234         return managed;
1235 }
1236
1237 MonoMethod*
1238 mono_method_get_last_managed (void)
1239 {
1240         MonoMethod *m = NULL;
1241         stack_walk (last_managed, FALSE, &m);
1242         return m;
1243 }
1244
1245 void
1246 mono_loader_lock (void)
1247 {
1248         EnterCriticalSection (&loader_mutex);
1249 }
1250
1251 void
1252 mono_loader_unlock (void)
1253 {
1254         LeaveCriticalSection (&loader_mutex);
1255 }
1256
1257 MonoMethodSignature*
1258 mono_method_signature (MonoMethod *method)
1259 {
1260         return method->signature;
1261 }
1262
1263 const char*
1264 mono_method_get_name (MonoMethod *method)
1265 {
1266         return method->name;
1267 }
1268
1269 MonoClass*
1270 mono_method_get_class (MonoMethod *method)
1271 {
1272         return method->klass;
1273 }
1274
1275 guint32
1276 mono_method_get_token (MonoMethod *method)
1277 {
1278         return method->token;
1279 }
1280
1281 guint32
1282 mono_method_get_flags (MonoMethod *method, guint32 *iflags)
1283 {
1284         if (iflags)
1285                 *iflags = method->iflags;
1286         return method->flags;
1287 }
1288
1289