mono/metadata/domain.c

   1 /*
   2  * domain.c: MonoDomain functions
   3  *
   4  * Author:
   5  *      Dietmar Maurer (dietmar@ximian.com)
   6  *      Patrik Torstensson
   7  *
   8  * (C) 2001 Ximian, Inc.
   9  */
  10
  11 #include <config.h>
  12 #include <glib.h>
  13 #include <string.h>
  14 #include <sys/stat.h>
  15
  16 #include <mono/os/gc_wrapper.h>
  17
  18 #include <mono/utils/mono-compiler.h>
  19 #include <mono/utils/mono-logger.h>
  20 #include <mono/metadata/object.h>
  21 #include <mono/metadata/object-internals.h>
  22 #include <mono/metadata/domain-internals.h>
  23 #include <mono/metadata/class-internals.h>
  24 #include <mono/metadata/assembly.h>
  25 #include <mono/metadata/exception.h>
  26 #include <mono/metadata/cil-coff.h>
  27 #include <mono/metadata/rawbuffer.h>
  28 #include <mono/metadata/metadata-internals.h>
  29 #include <mono/metadata/gc-internal.h>
  30 #include <mono/metadata/appdomain.h>
  31 #include <mono/metadata/mono-debug-debugger.h>
  32 #include <metadata/threads.h>
  33
  34 /* #define DEBUG_DOMAIN_UNLOAD */
  35
  36 /* we need to use both the Tls* functions and __thread because
  37  * some archs may generate faster jit code with one meachanism
  38  * or the other (we used to do it because tls slots were GC-tracked,
  39  * but we can't depend on this).
  40  */
  41 static guint32 appdomain_thread_id = -1;
  42
  43 #ifdef HAVE_KW_THREAD
  44 static __thread MonoDomain * tls_appdomain MONO_TLS_FAST;
  45 #define GET_APPDOMAIN() tls_appdomain
  46 #define SET_APPDOMAIN(x) do { \
  47         tls_appdomain = x; \
  48         TlsSetValue (appdomain_thread_id, x); \
  49 } while (FALSE)
  50
  51 #else
  52
  53 #define GET_APPDOMAIN() ((MonoDomain *)TlsGetValue (appdomain_thread_id))
  54 #define SET_APPDOMAIN(x) TlsSetValue (appdomain_thread_id, x);
  55
  56 #endif
  57
  58 #define GET_APPCONTEXT() (mono_thread_current ()->current_appcontext)
  59 #define SET_APPCONTEXT(x) MONO_OBJECT_SETREF (mono_thread_current (), current_appcontext, (x))
  60
  61 static guint16 appdomain_list_size = 0;
  62 static guint16 appdomain_next = 0;
  63 static MonoDomain **appdomains_list = NULL;
  64
  65 #define mono_appdomains_lock() EnterCriticalSection (&appdomains_mutex)
  66 #define mono_appdomains_unlock() LeaveCriticalSection (&appdomains_mutex)
  67 static CRITICAL_SECTION appdomains_mutex;
  68
  69 static MonoDomain *mono_root_domain = NULL;
  70
  71 /* AppConfigInfo: Information about runtime versions supported by an
  72  * aplication.
  73  */
  74 typedef struct {
  75         GSList *supported_runtimes;
  76         char *required_runtime;
  77         int configuration_count;
  78         int startup_count;
  79 } AppConfigInfo;
  80
  81 /*
  82  * AotModuleInfo: Contains information about AOT modules.
  83  */
  84 typedef struct {
  85         MonoImage *image;
  86         gpointer start, end;
  87 } AotModuleInfo;
  88
  89 static const MonoRuntimeInfo *current_runtime = NULL;
  90
  91 static MonoJitInfoFindInAot jit_info_find_in_aot_func = NULL;
  92
  93 /*
  94  * Contains information about AOT loaded code.
  95  */
  96 static MonoJitInfoTable *aot_modules = NULL;
  97
  98 /* This is the list of runtime versions supported by this JIT.
  99  */
 100 static const MonoRuntimeInfo supported_runtimes[] = {
 101         {"v1.0.3705", "1.0", { {1,0,5000,0}, {7,0,5000,0} }     },
 102         {"v1.1.4322", "1.0", { {1,0,5000,0}, {7,0,5000,0} }     },
 103         {"v2.0.50215","2.0", { {2,0,0,0},    {8,0,0,0} }        },
 104         {"v2.0.50727","2.0", { {2,0,0,0},    {8,0,0,0} }        }
 105 };
 106
 107
 108 /* The stable runtime version */
 109 #define DEFAULT_RUNTIME_VERSION "v1.1.4322"
 110
 111 static void
 112 get_runtimes_from_exe (const char *exe_file, const MonoRuntimeInfo** runtimes);
 113
 114 static const MonoRuntimeInfo*
 115 get_runtime_by_version (const char *version);
 116
 117 static MonoImage*
 118 mono_jit_info_find_aot_module (guint8* addr);
 119
 120 guint32
 121 mono_domain_get_tls_key (void)
 122 {
 123         return appdomain_thread_id;
 124 }
 125
 126 gint32
 127 mono_domain_get_tls_offset (void)
 128 {
 129         int offset = -1;
 130         MONO_THREAD_VAR_OFFSET (tls_appdomain, offset);
 131 /*      __asm ("jmp 1f; .section writetext, \"awx\"; 1: movl $tls_appdomain@ntpoff, %0; jmp 2f; .previous; 2:"
 132                 : "=r" (offset));*/
 133         return offset;
 134 }
 135
 136 static MonoJitInfoTable *
 137 mono_jit_info_table_new (void)
 138 {
 139         return g_array_new (FALSE, FALSE, sizeof (gpointer));
 140 }
 141
 142 static void
 143 mono_jit_info_table_free (MonoJitInfoTable *table)
 144 {
 145         g_array_free (table, TRUE);
 146 }
 147
 148 static int
 149 mono_jit_info_table_index (MonoJitInfoTable *table, char *addr)
 150 {
 151         int left = 0, right = table->len;
 152
 153         while (left < right) {
 154                 int pos = (left + right) / 2;
 155                 MonoJitInfo *ji = g_array_index (table, gpointer, pos);
 156                 char *start = ji->code_start;
 157                 char *end = start + ji->code_size;
 158
 159                 if (addr < start)
 160                         right = pos;
 161                 else if (addr >= end)
 162                         left = pos + 1;
 163                 else
 164                         return pos;
 165         }
 166
 167         return left;
 168 }
 169
 170 MonoJitInfo *
 171 mono_jit_info_table_find (MonoDomain *domain, char *addr)
 172 {
 173         MonoJitInfoTable *table = domain->jit_info_table;
 174         MonoJitInfo *ji;
 175         guint left = 0, right;
 176
 177         mono_domain_lock (domain);
 178
 179         right = table->len;
 180         while (left < right) {
 181                 guint pos = (left + right) / 2;
 182                 ji = g_array_index (table, gpointer, pos);
 183
 184                 if (addr < (char*)ji->code_start)
 185                         right = pos;
 186                 else if (addr >= (char*)ji->code_start + ji->code_size)
 187                         left = pos + 1;
 188                 else {
 189                         mono_domain_unlock (domain);
 190                         return ji;
 191                 }
 192         }
 193         mono_domain_unlock (domain);
 194
 195         /* maybe it is shared code, so we also search in the root domain */
 196         ji = NULL;
 197         if (domain != mono_root_domain)
 198                 ji = mono_jit_info_table_find (mono_root_domain, addr);
 199
 200         if (ji == NULL) {
 201                 /* Maybe its an AOT module */
 202                 MonoImage *image = mono_jit_info_find_aot_module ((guint8*)addr);
 203                 if (image)
 204                         ji = jit_info_find_in_aot_func (domain, image, addr);
 205         }
 206
 207         return ji;
 208 }
 209
 210 void
 211 mono_jit_info_table_add (MonoDomain *domain, MonoJitInfo *ji)
 212 {
 213         MonoJitInfoTable *table = domain->jit_info_table;
 214         gpointer start = ji->code_start;
 215         int pos;
 216
 217         mono_domain_lock (domain);
 218         pos = mono_jit_info_table_index (table, start);
 219
 220         g_array_insert_val (table, pos, ji);
 221         mono_domain_unlock (domain);
 222 }
 223
 224 void
 225 mono_jit_info_table_remove (MonoDomain *domain, MonoJitInfo *ji)
 226 {
 227         MonoJitInfoTable *table = domain->jit_info_table;
 228         gpointer start = ji->code_start;
 229         int pos;
 230
 231         mono_domain_lock (domain);
 232         pos = mono_jit_info_table_index (table, start);
 233         if (g_array_index (table, gpointer, pos) != ji) {
 234                 MonoJitInfo *ji2 = g_array_index (table, gpointer, pos);
 235                 g_assert (ji == ji2);
 236         }
 237         g_assert (g_array_index (table, gpointer, pos) == ji);
 238
 239         g_array_remove_index (table, pos);
 240         mono_domain_unlock (domain);
 241 }
 242
 243 static int
 244 aot_info_table_index (MonoJitInfoTable *table, char *addr)
 245 {
 246         int left = 0, right = table->len;
 247
 248         while (left < right) {
 249                 int pos = (left + right) / 2;
 250                 AotModuleInfo *ainfo = g_array_index (table, gpointer, pos);
 251                 char *start = ainfo->start;
 252                 char *end = ainfo->end;
 253
 254                 if (addr < start)
 255                         right = pos;
 256                 else if (addr >= end)
 257                         left = pos + 1;
 258                 else
 259                         return pos;
 260         }
 261
 262         return left;
 263 }
 264
 265 void
 266 mono_jit_info_add_aot_module (MonoImage *image, gpointer start, gpointer end)
 267 {
 268         AotModuleInfo *ainfo = g_new0 (AotModuleInfo, 1);
 269         int pos;
 270
 271         ainfo->image = image;
 272         ainfo->start = start;
 273         ainfo->end = end;
 274
 275         mono_appdomains_lock ();
 276
 277         if (!aot_modules)
 278                 aot_modules = mono_jit_info_table_new ();
 279
 280         pos = aot_info_table_index (aot_modules, start);
 281
 282         g_array_insert_val (aot_modules, pos, ainfo);
 283
 284         mono_appdomains_unlock ();
 285 }
 286
 287 static MonoImage*
 288 mono_jit_info_find_aot_module (guint8* addr)
 289 {
 290         guint left = 0, right;
 291
 292         if (!aot_modules)
 293                 return NULL;
 294
 295         mono_appdomains_lock ();
 296
 297         right = aot_modules->len;
 298         while (left < right) {
 299                 guint pos = (left + right) / 2;
 300                 AotModuleInfo *ai = g_array_index (aot_modules, gpointer, pos);
 301
 302                 if (addr < (guint8*)ai->start)
 303                         right = pos;
 304                 else if (addr >= (guint8*)ai->end)
 305                         left = pos + 1;
 306                 else {
 307                         mono_appdomains_unlock ();
 308                         return ai->image;
 309                 }
 310         }
 311
 312         mono_appdomains_unlock ();
 313
 314         return NULL;
 315 }
 316
 317 void
 318 mono_install_jit_info_find_in_aot (MonoJitInfoFindInAot func)
 319 {
 320         jit_info_find_in_aot_func = func;
 321 }
 322
 323 gpointer
 324 mono_jit_info_get_code_start (MonoJitInfo* ji)
 325 {
 326         return ji->code_start;
 327 }
 328
 329 int
 330 mono_jit_info_get_code_size (MonoJitInfo* ji)
 331 {
 332         return ji->code_size;
 333 }
 334
 335 MonoMethod*
 336 mono_jit_info_get_method (MonoJitInfo* ji)
 337 {
 338         return ji->method;
 339 }
 340
 341 /**
 342  * mono_string_equal:
 343  * @s1: First string to compare
 344  * @s2: Second string to compare
 345  *
 346  * Returns FALSE if the strings differ.
 347  */
 348 gboolean
 349 mono_string_equal (MonoString *s1, MonoString *s2)
 350 {
 351         int l1 = mono_string_length (s1);
 352         int l2 = mono_string_length (s2);
 353
 354         if (s1 == s2)
 355                 return TRUE;
 356         if (l1 != l2)
 357                 return FALSE;
 358
 359         return memcmp (mono_string_chars (s1), mono_string_chars (s2), l1 * 2) == 0;
 360 }
 361
 362 /**
 363  * mono_string_hash:
 364  * @s: the string to hash
 365  *
 366  * Returns the hash for the string.
 367  */
 368 guint
 369 mono_string_hash (MonoString *s)
 370 {
 371         const guint16 *p = mono_string_chars (s);
 372         int i, len = mono_string_length (s);
 373         guint h = 0;
 374
 375         for (i = 0; i < len; i++) {
 376                 h = (h << 5) - h + *p;
 377                 p++;
 378         }
 379
 380         return h;
 381 }
 382
 383 static gboolean
 384 mono_ptrarray_equal (gpointer *s1, gpointer *s2)
 385 {
 386         int len = GPOINTER_TO_INT (s1 [0]);
 387         if (len != GPOINTER_TO_INT (s2 [0]))
 388                 return FALSE;
 389
 390         return memcmp (s1 + 1, s2 + 1, len * sizeof(gpointer)) == 0;
 391 }
 392
 393 static guint
 394 mono_ptrarray_hash (gpointer *s)
 395 {
 396         int i;
 397         int len = GPOINTER_TO_INT (s [0]);
 398         guint hash = 0;
 399
 400         for (i = 1; i < len; i++)
 401                 hash += GPOINTER_TO_UINT (s [i]);
 402
 403         return hash;
 404 }
 405
 406 /*
 407  * Allocate an id for domain and set domain->domain_id.
 408  * LOCKING: must be called while holding appdomains_mutex.
 409  * We try to assign low numbers to the domain, so it can be used
 410  * as an index in data tables to lookup domain-specific info
 411  * with minimal memory overhead. We also try not to reuse the
 412  * same id too quickly (to help debugging).
 413  */
 414 static int
 415 domain_id_alloc (MonoDomain *domain)
 416 {
 417         int id = -1, i;
 418         if (!appdomains_list) {
 419                 appdomain_list_size = 2;
 420                 appdomains_list = mono_gc_alloc_fixed (appdomain_list_size * sizeof (void*), NULL);
 421         }
 422         for (i = appdomain_next; i < appdomain_list_size; ++i) {
 423                 if (!appdomains_list [i]) {
 424                         id = i;
 425                         break;
 426                 }
 427         }
 428         if (id == -1) {
 429                 for (i = 0; i < appdomain_next; ++i) {
 430                         if (!appdomains_list [i]) {
 431                                 id = i;
 432                                 break;
 433                         }
 434                 }
 435         }
 436         if (id == -1) {
 437                 MonoDomain **new_list;
 438                 int new_size = appdomain_list_size * 2;
 439                 if (new_size >= (1 << 16))
 440                         g_assert_not_reached ();
 441                 id = appdomain_list_size;
 442                 new_list = mono_gc_alloc_fixed (new_size * sizeof (void*), NULL);
 443                 memcpy (new_list, appdomains_list, appdomain_list_size * sizeof (void*));
 444                 mono_gc_free_fixed (appdomains_list);
 445                 appdomains_list = new_list;
 446                 appdomain_list_size = new_size;
 447         }
 448         domain->domain_id = id;
 449         appdomains_list [id] = domain;
 450         appdomain_next++;
 451         if (appdomain_next > appdomain_list_size)
 452                 appdomain_next = 0;
 453         return id;
 454 }
 455
 456 static guint32 domain_gc_bitmap [sizeof(MonoDomain)/4/32 + 1];
 457 static gpointer domain_gc_desc = NULL;
 458
 459 MonoDomain *
 460 mono_domain_create (void)
 461 {
 462         MonoDomain *domain;
 463
 464         mono_appdomains_lock ();
 465         if (!domain_gc_desc) {
 466                 unsigned int i, bit = 0;
 467                 for (i = G_STRUCT_OFFSET (MonoDomain, MONO_DOMAIN_FIRST_OBJECT); i < G_STRUCT_OFFSET (MonoDomain, MONO_DOMAIN_FIRST_GC_TRACKED); i += sizeof (gpointer)) {
 468                         bit = i / sizeof (gpointer);
 469                         domain_gc_bitmap [bit / 32] |= 1 << (bit % 32);
 470                 }
 471                 domain_gc_desc = mono_gc_make_descr_from_bitmap (domain_gc_bitmap, bit + 1);
 472         }
 473         mono_appdomains_unlock ();
 474
 475         domain = mono_gc_alloc_fixed (sizeof (MonoDomain), domain_gc_desc);
 476         domain->domain = NULL;
 477         domain->setup = NULL;
 478         domain->friendly_name = NULL;
 479         domain->search_path = NULL;
 480
 481         domain->mp = mono_mempool_new ();
 482         domain->code_mp = mono_code_manager_new ();
 483         domain->env = mono_g_hash_table_new_type ((GHashFunc)mono_string_hash, (GCompareFunc)mono_string_equal, MONO_HASH_KEY_VALUE_GC);
 484         domain->domain_assemblies = NULL;
 485         domain->class_vtable_hash = g_hash_table_new (mono_aligned_addr_hash, NULL);
 486         domain->proxy_vtable_hash = g_hash_table_new ((GHashFunc)mono_ptrarray_hash, (GCompareFunc)mono_ptrarray_equal);
 487         domain->static_data_array = NULL;
 488         domain->jit_code_hash = g_hash_table_new (mono_aligned_addr_hash, NULL);
 489         domain->ldstr_table = mono_g_hash_table_new ((GHashFunc)mono_string_hash, (GCompareFunc)mono_string_equal);
 490         domain->jit_info_table = mono_jit_info_table_new ();
 491         domain->class_init_trampoline_hash = g_hash_table_new (mono_aligned_addr_hash, NULL);
 492         domain->jump_trampoline_hash = g_hash_table_new (mono_aligned_addr_hash, NULL);
 493         domain->finalizable_objects_hash = g_hash_table_new (mono_aligned_addr_hash, NULL);
 494         domain->jit_trampoline_hash = g_hash_table_new (mono_aligned_addr_hash, NULL);
 495         domain->delegate_trampoline_hash = g_hash_table_new (mono_aligned_addr_hash, NULL);
 496
 497         InitializeCriticalSection (&domain->lock);
 498         InitializeCriticalSection (&domain->assemblies_lock);
 499
 500         mono_appdomains_lock ();
 501         domain_id_alloc (domain);
 502         mono_appdomains_unlock ();
 503
 504         return domain;
 505 }
 506
 507 /**
 508  * mono_init_internal:
 509  *
 510  * Creates the initial application domain and initializes the mono_defaults
 511  * structure.
 512  * This function is guaranteed to not run any IL code.
 513  * If exe_filename is not NULL, the method will determine the required runtime
 514  * from the exe configuration file or the version PE field.
 515  * If runtime_version is not NULL, that runtime version will be used.
 516  * Either exe_filename or runtime_version must be provided.
 517  *
 518  * Returns: the initial domain.
 519  */
 520 static MonoDomain *
 521 mono_init_internal (const char *filename, const char *exe_filename, const char *runtime_version)
 522 {
 523         static MonoDomain *domain = NULL;
 524         MonoAssembly *ass = NULL;
 525         MonoImageOpenStatus status = MONO_IMAGE_OK;
 526         const MonoRuntimeInfo* runtimes [G_N_ELEMENTS (supported_runtimes) + 1];
 527         int n;
 528
 529         if (domain)
 530                 g_assert_not_reached ();
 531
 532         MONO_GC_PRE_INIT ();
 533
 534         appdomain_thread_id = TlsAlloc ();
 535
 536         InitializeCriticalSection (&appdomains_mutex);
 537
 538         mono_metadata_init ();
 539         mono_raw_buffer_init ();
 540         mono_images_init ();
 541         mono_assemblies_init ();
 542         mono_classes_init ();
 543         mono_loader_init ();
 544
 545         /* FIXME: When should we release this memory? */
 546         MONO_GC_REGISTER_ROOT (appdomains_list);
 547
 548         domain = mono_domain_create ();
 549         mono_root_domain = domain;
 550
 551         SET_APPDOMAIN (domain);
 552
 553         /* Get a list of runtimes supported by the exe */
 554         if (exe_filename != NULL) {
 555                 get_runtimes_from_exe (exe_filename, runtimes);
 556         } else if (runtime_version != NULL) {
 557                 runtimes [0] = get_runtime_by_version (runtime_version);
 558                 runtimes [1] = NULL;
 559         }
 560
 561         if (runtimes [0] == NULL) {
 562                 const MonoRuntimeInfo *default_runtime = get_runtime_by_version (DEFAULT_RUNTIME_VERSION);
 563                 runtimes [0] = default_runtime;
 564                 runtimes [1] = NULL;
 565                 g_print ("WARNING: The runtime version supported by this application is unavailable.\n");
 566                 g_print ("Using default runtime: %s\n", default_runtime->runtime_version);
 567         }
 568
 569         /* The selected runtime will be the first one for which there is a mscrolib.dll */
 570         for (n = 0; runtimes [n] != NULL && ass == NULL; n++) {
 571                 current_runtime = runtimes [n];
 572                 ass = mono_assembly_load_corlib (current_runtime, &status);
 573                 if (status != MONO_IMAGE_OK && status != MONO_IMAGE_ERROR_ERRNO)
 574                         break;
 575         }
 576
 577         if ((status != MONO_IMAGE_OK) || (ass == NULL)) {
 578                 switch (status){
 579                 case MONO_IMAGE_ERROR_ERRNO: {
 580                         char *corlib_file = g_build_filename (mono_assembly_getrootdir (), "mono", current_runtime->framework_version, "mscorlib.dll", NULL);
 581                         g_print ("The assembly mscorlib.dll was not found or could not be loaded.\n");
 582                         g_print ("It should have been installed in the `%s' directory.\n", corlib_file);
 583                         g_free (corlib_file);
 584                         break;
 585                 }
 586                 case MONO_IMAGE_IMAGE_INVALID:
 587                         g_print ("The file %s/mscorlib.dll is an invalid CIL image\n",
 588                                  mono_assembly_getrootdir ());
 589                         break;
 590                 case MONO_IMAGE_MISSING_ASSEMBLYREF:
 591                         g_print ("Missing assembly reference in %s/mscorlib.dll\n",
 592                                  mono_assembly_getrootdir ());
 593                         break;
 594                 case MONO_IMAGE_OK:
 595                         /* to suppress compiler warning */
 596                         break;
 597                 }
 598
 599                 exit (1);
 600         }
 601         mono_defaults.corlib = mono_assembly_get_image (ass);
 602
 603         mono_defaults.object_class = mono_class_from_name (
 604                 mono_defaults.corlib, "System", "Object");
 605         g_assert (mono_defaults.object_class != 0);
 606
 607         mono_defaults.void_class = mono_class_from_name (
 608                 mono_defaults.corlib, "System", "Void");
 609         g_assert (mono_defaults.void_class != 0);
 610
 611         mono_defaults.boolean_class = mono_class_from_name (
 612                 mono_defaults.corlib, "System", "Boolean");
 613         g_assert (mono_defaults.boolean_class != 0);
 614
 615         mono_defaults.byte_class = mono_class_from_name (
 616                 mono_defaults.corlib, "System", "Byte");
 617         g_assert (mono_defaults.byte_class != 0);
 618
 619         mono_defaults.sbyte_class = mono_class_from_name (
 620                 mono_defaults.corlib, "System", "SByte");
 621         g_assert (mono_defaults.sbyte_class != 0);
 622
 623         mono_defaults.int16_class = mono_class_from_name (
 624                 mono_defaults.corlib, "System", "Int16");
 625         g_assert (mono_defaults.int16_class != 0);
 626
 627         mono_defaults.uint16_class = mono_class_from_name (
 628                 mono_defaults.corlib, "System", "UInt16");
 629         g_assert (mono_defaults.uint16_class != 0);
 630
 631         mono_defaults.int32_class = mono_class_from_name (
 632                 mono_defaults.corlib, "System", "Int32");
 633         g_assert (mono_defaults.int32_class != 0);
 634
 635         mono_defaults.uint32_class = mono_class_from_name (
 636                 mono_defaults.corlib, "System", "UInt32");
 637         g_assert (mono_defaults.uint32_class != 0);
 638
 639         mono_defaults.uint_class = mono_class_from_name (
 640                 mono_defaults.corlib, "System", "UIntPtr");
 641         g_assert (mono_defaults.uint_class != 0);
 642
 643         mono_defaults.int_class = mono_class_from_name (
 644                 mono_defaults.corlib, "System", "IntPtr");
 645         g_assert (mono_defaults.int_class != 0);
 646
 647         mono_defaults.int64_class = mono_class_from_name (
 648                 mono_defaults.corlib, "System", "Int64");
 649         g_assert (mono_defaults.int64_class != 0);
 650
 651         mono_defaults.uint64_class = mono_class_from_name (
 652                 mono_defaults.corlib, "System", "UInt64");
 653         g_assert (mono_defaults.uint64_class != 0);
 654
 655         mono_defaults.single_class = mono_class_from_name (
 656                 mono_defaults.corlib, "System", "Single");
 657         g_assert (mono_defaults.single_class != 0);
 658
 659         mono_defaults.double_class = mono_class_from_name (
 660                 mono_defaults.corlib, "System", "Double");
 661         g_assert (mono_defaults.double_class != 0);
 662
 663         mono_defaults.char_class = mono_class_from_name (
 664                 mono_defaults.corlib, "System", "Char");
 665         g_assert (mono_defaults.char_class != 0);
 666
 667         mono_defaults.string_class = mono_class_from_name (
 668                 mono_defaults.corlib, "System", "String");
 669         g_assert (mono_defaults.string_class != 0);
 670
 671         mono_defaults.enum_class = mono_class_from_name (
 672                 mono_defaults.corlib, "System", "Enum");
 673         g_assert (mono_defaults.enum_class != 0);
 674
 675         mono_defaults.array_class = mono_class_from_name (
 676                 mono_defaults.corlib, "System", "Array");
 677         g_assert (mono_defaults.array_class != 0);
 678
 679         mono_defaults.delegate_class = mono_class_from_name (
 680                 mono_defaults.corlib, "System", "Delegate");
 681         g_assert (mono_defaults.delegate_class != 0 );
 682
 683         mono_defaults.multicastdelegate_class = mono_class_from_name (
 684                 mono_defaults.corlib, "System", "MulticastDelegate");
 685         g_assert (mono_defaults.multicastdelegate_class != 0 );
 686
 687         mono_defaults.asyncresult_class = mono_class_from_name (
 688                 mono_defaults.corlib, "System.Runtime.Remoting.Messaging",
 689                 "AsyncResult");
 690         g_assert (mono_defaults.asyncresult_class != 0 );
 691
 692         mono_defaults.waithandle_class = mono_class_from_name (
 693                 mono_defaults.corlib, "System.Threading", "WaitHandle");
 694         g_assert (mono_defaults.waithandle_class != 0 );
 695
 696         mono_defaults.typehandle_class = mono_class_from_name (
 697                 mono_defaults.corlib, "System", "RuntimeTypeHandle");
 698         g_assert (mono_defaults.typehandle_class != 0);
 699
 700         mono_defaults.methodhandle_class = mono_class_from_name (
 701                 mono_defaults.corlib, "System", "RuntimeMethodHandle");
 702         g_assert (mono_defaults.methodhandle_class != 0);
 703
 704         mono_defaults.fieldhandle_class = mono_class_from_name (
 705                 mono_defaults.corlib, "System", "RuntimeFieldHandle");
 706         g_assert (mono_defaults.fieldhandle_class != 0);
 707
 708         mono_defaults.systemtype_class = mono_class_from_name (
 709                 mono_defaults.corlib, "System", "Type");
 710         g_assert (mono_defaults.systemtype_class != 0);
 711
 712         mono_defaults.monotype_class = mono_class_from_name (
 713                 mono_defaults.corlib, "System", "MonoType");
 714         g_assert (mono_defaults.monotype_class != 0);
 715
 716         mono_defaults.exception_class = mono_class_from_name (
 717                 mono_defaults.corlib, "System", "Exception");
 718         g_assert (mono_defaults.exception_class != 0);
 719
 720         mono_defaults.threadabortexception_class = mono_class_from_name (
 721                 mono_defaults.corlib, "System.Threading", "ThreadAbortException");
 722         g_assert (mono_defaults.threadabortexception_class != 0);
 723
 724         mono_defaults.thread_class = mono_class_from_name (
 725                 mono_defaults.corlib, "System.Threading", "Thread");
 726         g_assert (mono_defaults.thread_class != 0);
 727
 728         mono_defaults.appdomain_class = mono_class_from_name (
 729                 mono_defaults.corlib, "System", "AppDomain");
 730         g_assert (mono_defaults.appdomain_class != 0);
 731
 732         mono_defaults.transparent_proxy_class = mono_class_from_name (
 733                 mono_defaults.corlib, "System.Runtime.Remoting.Proxies", "TransparentProxy");
 734         g_assert (mono_defaults.transparent_proxy_class != 0);
 735
 736         mono_defaults.real_proxy_class = mono_class_from_name (
 737                 mono_defaults.corlib, "System.Runtime.Remoting.Proxies", "RealProxy");
 738         g_assert (mono_defaults.real_proxy_class != 0);
 739
 740         mono_defaults.mono_method_message_class = mono_class_from_name (
 741                 mono_defaults.corlib, "System.Runtime.Remoting.Messaging", "MonoMethodMessage");
 742         g_assert (mono_defaults.mono_method_message_class != 0);
 743
 744         mono_defaults.field_info_class = mono_class_from_name (
 745                 mono_defaults.corlib, "System.Reflection", "FieldInfo");
 746         g_assert (mono_defaults.field_info_class != 0);
 747
 748         mono_defaults.method_info_class = mono_class_from_name (
 749                 mono_defaults.corlib, "System.Reflection", "MethodInfo");
 750         g_assert (mono_defaults.method_info_class != 0);
 751
 752         mono_defaults.stringbuilder_class = mono_class_from_name (
 753                 mono_defaults.corlib, "System.Text", "StringBuilder");
 754         g_assert (mono_defaults.stringbuilder_class != 0);
 755
 756         mono_defaults.math_class = mono_class_from_name (
 757                 mono_defaults.corlib, "System", "Math");
 758         g_assert (mono_defaults.math_class != 0);
 759
 760         mono_defaults.stack_frame_class = mono_class_from_name (
 761                 mono_defaults.corlib, "System.Diagnostics", "StackFrame");
 762         g_assert (mono_defaults.stack_frame_class != 0);
 763
 764         mono_defaults.stack_trace_class = mono_class_from_name (
 765                 mono_defaults.corlib, "System.Diagnostics", "StackTrace");
 766         g_assert (mono_defaults.stack_trace_class != 0);
 767
 768         mono_defaults.marshal_class = mono_class_from_name (
 769                 mono_defaults.corlib, "System.Runtime.InteropServices", "Marshal");
 770         g_assert (mono_defaults.marshal_class != 0);
 771
 772         mono_defaults.iserializeable_class = mono_class_from_name (
 773                 mono_defaults.corlib, "System.Runtime.Serialization", "ISerializable");
 774         g_assert (mono_defaults.iserializeable_class != 0);
 775
 776         mono_defaults.serializationinfo_class = mono_class_from_name (
 777                 mono_defaults.corlib, "System.Runtime.Serialization", "SerializationInfo");
 778         g_assert (mono_defaults.serializationinfo_class != 0);
 779
 780         mono_defaults.streamingcontext_class = mono_class_from_name (
 781                 mono_defaults.corlib, "System.Runtime.Serialization", "StreamingContext");
 782         g_assert (mono_defaults.streamingcontext_class != 0);
 783
 784         mono_defaults.typed_reference_class =  mono_class_from_name (
 785                 mono_defaults.corlib, "System", "TypedReference");
 786         g_assert (mono_defaults.typed_reference_class != 0);
 787
 788         mono_defaults.argumenthandle_class =  mono_class_from_name (
 789                 mono_defaults.corlib, "System", "RuntimeArgumentHandle");
 790         g_assert (mono_defaults.argumenthandle_class != 0);
 791
 792         mono_defaults.marshalbyrefobject_class =  mono_class_from_name (
 793                 mono_defaults.corlib, "System", "MarshalByRefObject");
 794         g_assert (mono_defaults.marshalbyrefobject_class != 0);
 795
 796         mono_defaults.monitor_class =  mono_class_from_name (
 797                 mono_defaults.corlib, "System.Threading", "Monitor");
 798         g_assert (mono_defaults.monitor_class != 0);
 799
 800         mono_defaults.iremotingtypeinfo_class = mono_class_from_name (
 801                 mono_defaults.corlib, "System.Runtime.Remoting", "IRemotingTypeInfo");
 802         g_assert (mono_defaults.iremotingtypeinfo_class != 0);
 803
 804         mono_defaults.runtimesecurityframe_class = mono_class_from_name (
 805                 mono_defaults.corlib, "System.Security", "RuntimeSecurityFrame");
 806
 807         mono_defaults.executioncontext_class = mono_class_from_name (
 808                 mono_defaults.corlib, "System.Threading", "ExecutionContext");
 809
 810         mono_defaults.internals_visible_class = mono_class_from_name (
 811                 mono_defaults.corlib, "System.Runtime.CompilerServices", "InternalsVisibleToAttribute");
 812
 813         mono_defaults.variant_class = mono_class_from_name (
 814                 mono_defaults.corlib, "System", "Variant");
 815
 816         mono_defaults.com_object_class = mono_class_from_name (
 817                 mono_defaults.corlib, "System", "__ComObject");
 818
 819         mono_defaults.com_interop_proxy_class = mono_class_from_name (
 820                 mono_defaults.corlib, "Mono.Interop", "ComInteropProxy");
 821
 822
 823         /*
 824          * Note that mono_defaults.generic_*_class is only non-NULL if we're
 825          * using the 2.0 corlib.
 826          */
 827         mono_class_init (mono_defaults.array_class);
 828         mono_defaults.generic_nullable_class = mono_class_from_name (
 829                 mono_defaults.corlib, "System", "Nullable`1");
 830         mono_defaults.generic_ilist_class = mono_class_from_name (
 831                 mono_defaults.corlib, "System.Collections.Generic", "IList`1");
 832
 833         domain->friendly_name = g_path_get_basename (filename);
 834
 835         return domain;
 836 }
 837
 838 /**
 839  * mono_init:
 840  *
 841  * Creates the initial application domain and initializes the mono_defaults
 842  * structure.
 843  * This function is guaranteed to not run any IL code.
 844  * The runtime is initialized using the default runtime version.
 845  *
 846  * Returns: the initial domain.
 847  */
 848 MonoDomain *
 849 mono_init (const char *domain_name)
 850 {
 851         return mono_init_internal (domain_name, NULL, DEFAULT_RUNTIME_VERSION);
 852 }
 853
 854 /**
 855  * mono_init_from_assembly:
 856  *
 857  * Creates the initial application domain and initializes the mono_defaults
 858  * structure.
 859  * This function is guaranteed to not run any IL code.
 860  * The runtime is initialized using the runtime version required by the
 861  * provided executable. The version is determined by looking at the exe
 862  * configuration file and the version PE field)
 863  *
 864  * Returns: the initial domain.
 865  */
 866 MonoDomain *
 867 mono_init_from_assembly (const char *domain_name, const char *filename)
 868 {
 869         return mono_init_internal (domain_name, filename, NULL);
 870 }
 871
 872 /**
 873  * mono_init_version:
 874  *
 875  * Creates the initial application domain and initializes the mono_defaults
 876  * structure.
 877  * This function is guaranteed to not run any IL code.
 878  * The runtime is initialized using the provided rutime version.
 879  *
 880  * Returns: the initial domain.
 881  */
 882 MonoDomain *
 883 mono_init_version (const char *domain_name, const char *version)
 884 {
 885         return mono_init_internal (domain_name, NULL, version);
 886 }
 887
 888 /**
 889  * mono_cleanup:
 890  *
 891  * Cleans up all metadata modules.
 892  */
 893 void
 894 mono_cleanup (void)
 895 {
 896         mono_loader_cleanup ();
 897         mono_classes_cleanup ();
 898         mono_assemblies_cleanup ();
 899         mono_images_cleanup ();
 900         mono_raw_buffer_cleanup ();
 901         mono_metadata_cleanup ();
 902
 903         TlsFree (appdomain_thread_id);
 904         DeleteCriticalSection (&appdomains_mutex);
 905 }
 906
 907 /**
 908  * mono_get_root_domain:
 909  *
 910  * The root AppDomain is the initial domain created by the runtime when it is
 911  * initialized.  Programs execute on this AppDomain, but can create new ones
 912  * later.   Currently there is no unmanaged API to create new AppDomains, this
 913  * must be done from managed code.
 914  *
 915  * Returns: the root appdomain, to obtain the current domain, use mono_domain_get ()
 916  */
 917 MonoDomain*
 918 mono_get_root_domain (void)
 919 {
 920         return mono_root_domain;
 921 }
 922
 923 /**
 924  * mono_domain_get:
 925  *
 926  * Returns: the current domain, to obtain the root domain use
 927  * mono_get_root_domain().
 928  */
 929 MonoDomain *
 930 mono_domain_get ()
 931 {
 932         return GET_APPDOMAIN ();
 933 }
 934
 935 /**
 936  * mono_domain_set_internal:
 937  * @domain: the new domain
 938  *
 939  * Sets the current domain to @domain.
 940  */
 941 void
 942 mono_domain_set_internal (MonoDomain *domain)
 943 {
 944         SET_APPDOMAIN (domain);
 945         SET_APPCONTEXT (domain->default_context);
 946 }
 947
 948 void
 949 mono_domain_foreach (MonoDomainFunc func, gpointer user_data)
 950 {
 951         int i, size;
 952         MonoDomain **copy;
 953
 954         /*
 955          * Create a copy of the data to avoid calling the user callback
 956          * inside the lock because that could lead to deadlocks.
 957          * We can do this because this function is not perf. critical.
 958          */
 959         mono_appdomains_lock ();
 960         size = appdomain_list_size;
 961         copy = mono_gc_alloc_fixed (appdomain_list_size * sizeof (void*), NULL);
 962         memcpy (copy, appdomains_list, appdomain_list_size * sizeof (void*));
 963         mono_appdomains_unlock ();
 964
 965         for (i = 0; i < size; ++i) {
 966                 if (copy [i])
 967                         func (copy [i], user_data);
 968         }
 969
 970         mono_gc_free_fixed (copy);
 971 }
 972
 973 /**
 974  * mono_domain_assembly_open:
 975  * @domain: the application domain
 976  * @name: file name of the assembly
 977  *
 978  * fixme: maybe we should integrate this with mono_assembly_open ??
 979  */
 980 MonoAssembly *
 981 mono_domain_assembly_open (MonoDomain *domain, const char *name)
 982 {
 983         MonoAssembly *ass;
 984         GSList *tmp;
 985
 986         mono_domain_assemblies_lock (domain);
 987         for (tmp = domain->domain_assemblies; tmp; tmp = tmp->next) {
 988                 ass = tmp->data;
 989                 if (strcmp (name, ass->aname.name) == 0) {
 990                         mono_domain_assemblies_unlock (domain);
 991                         return ass;
 992                 }
 993         }
 994         mono_domain_assemblies_unlock (domain);
 995
 996         if (!(ass = mono_assembly_open (name, NULL)))
 997                 return NULL;
 998
 999         return ass;
1000 }
1001
1002 static void
1003 dynamic_method_info_free (gpointer key, gpointer value, gpointer user_data)
1004 {
1005         MonoJitDynamicMethodInfo *di = value;
1006         mono_code_manager_destroy (di->code_mp);
1007         g_free (di);
1008 }
1009
1010 static void
1011 delete_jump_list (gpointer key, gpointer value, gpointer user_data)
1012 {
1013         g_slist_free (value);
1014 }
1015
1016 void
1017 mono_domain_free (MonoDomain *domain, gboolean force)
1018 {
1019         GSList *tmp;
1020         if ((domain == mono_root_domain) && !force) {
1021                 g_warning ("cant unload root domain");
1022                 return;
1023         }
1024
1025         mono_appdomains_lock ();
1026         appdomains_list [domain->domain_id] = NULL;
1027         mono_appdomains_unlock ();
1028
1029         /* FIXME: free delegate_hash_table when it's used */
1030         if (domain->search_path) {
1031                 g_strfreev (domain->search_path);
1032                 domain->search_path = NULL;
1033         }
1034         domain->create_proxy_for_type_method = NULL;
1035         domain->private_invoke_method = NULL;
1036         domain->default_context = NULL;
1037         domain->out_of_memory_ex = NULL;
1038         domain->null_reference_ex = NULL;
1039         domain->stack_overflow_ex = NULL;
1040         domain->entry_assembly = NULL;
1041         for (tmp = domain->domain_assemblies; tmp; tmp = tmp->next) {
1042                 MonoAssembly *ass = tmp->data;
1043                 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY, "Unloading domain %s %p, assembly %s %p, refcount=%d\n", domain->friendly_name, domain, ass->aname.name, ass, ass->ref_count);
1044                 mono_assembly_close (ass);
1045         }
1046         g_slist_free (domain->domain_assemblies);
1047         domain->domain_assemblies = NULL;
1048
1049         g_free (domain->friendly_name);
1050         domain->friendly_name = NULL;
1051         mono_g_hash_table_destroy (domain->env);
1052         domain->env = NULL;
1053         g_hash_table_destroy (domain->class_vtable_hash);
1054         domain->class_vtable_hash = NULL;
1055         g_hash_table_destroy (domain->proxy_vtable_hash);
1056         domain->proxy_vtable_hash = NULL;
1057         if (domain->static_data_array) {
1058                 mono_gc_free_fixed (domain->static_data_array);
1059                 domain->static_data_array = NULL;
1060         }
1061         g_hash_table_destroy (domain->jit_code_hash);
1062         domain->jit_code_hash = NULL;
1063         if (domain->dynamic_code_hash) {
1064                 g_hash_table_foreach (domain->dynamic_code_hash, dynamic_method_info_free, NULL);
1065                 g_hash_table_destroy (domain->dynamic_code_hash);
1066                 domain->dynamic_code_hash = NULL;
1067         }
1068         mono_g_hash_table_destroy (domain->ldstr_table);
1069         domain->ldstr_table = NULL;
1070         mono_jit_info_table_free (domain->jit_info_table);
1071         domain->jit_info_table = NULL;
1072 #ifdef DEBUG_DOMAIN_UNLOAD
1073         mono_mempool_invalidate (domain->mp);
1074         mono_code_manager_invalidate (domain->code_mp);
1075 #else
1076         mono_mempool_destroy (domain->mp);
1077         domain->mp = NULL;
1078         mono_code_manager_destroy (domain->code_mp);
1079         domain->code_mp = NULL;
1080 #endif
1081         if (domain->jump_target_hash) {
1082                 g_hash_table_foreach (domain->jump_target_hash, delete_jump_list, NULL);
1083                 g_hash_table_destroy (domain->jump_target_hash);
1084                 domain->jump_target_hash = NULL;
1085         }
1086         if (domain->type_hash) {
1087                 mono_g_hash_table_destroy (domain->type_hash);
1088                 domain->type_hash = NULL;
1089         }
1090         if (domain->refobject_hash) {
1091                 mono_g_hash_table_destroy (domain->refobject_hash);
1092                 domain->refobject_hash = NULL;
1093         }
1094         if (domain->type_init_exception_hash) {
1095                 mono_g_hash_table_destroy (domain->type_init_exception_hash);
1096                 domain->type_init_exception_hash = NULL;
1097         }
1098         g_hash_table_destroy (domain->class_init_trampoline_hash);
1099         domain->class_init_trampoline_hash = NULL;
1100         g_hash_table_destroy (domain->jump_trampoline_hash);
1101         domain->jump_trampoline_hash = NULL;
1102         g_hash_table_destroy (domain->finalizable_objects_hash);
1103         domain->finalizable_objects_hash = NULL;
1104         g_hash_table_destroy (domain->jit_trampoline_hash);
1105         domain->jit_trampoline_hash = NULL;
1106         g_hash_table_destroy (domain->delegate_trampoline_hash);
1107         domain->delegate_trampoline_hash = NULL;
1108         if (domain->special_static_fields) {
1109                 g_hash_table_destroy (domain->special_static_fields);
1110                 domain->special_static_fields = NULL;
1111         }
1112         DeleteCriticalSection (&domain->assemblies_lock);
1113         DeleteCriticalSection (&domain->lock);
1114         domain->setup = NULL;
1115
1116         /* FIXME: anything else required ? */
1117
1118         mono_gc_free_fixed (domain);
1119
1120         if ((domain == mono_root_domain))
1121                 mono_root_domain = NULL;
1122 }
1123
1124 /**
1125  * mono_domain_get_id:
1126  * @domainid: the ID
1127  *
1128  * Returns: the a domain for a specific domain id.
1129  */
1130 MonoDomain *
1131 mono_domain_get_by_id (gint32 domainid)
1132 {
1133         MonoDomain * domain;
1134
1135         mono_appdomains_lock ();
1136         if (domainid < appdomain_list_size)
1137                 domain = appdomains_list [domainid];
1138         else
1139                 domain = NULL;
1140         mono_appdomains_unlock ();
1141
1142         return domain;
1143 }
1144
1145 gint32
1146 mono_domain_get_id (MonoDomain *domain)
1147 {
1148         return domain->domain_id;
1149 }
1150
1151 void
1152 mono_context_set (MonoAppContext * new_context)
1153 {
1154         SET_APPCONTEXT (new_context);
1155 }
1156
1157 MonoAppContext *
1158 mono_context_get (void)
1159 {
1160         return GET_APPCONTEXT ();
1161 }
1162
1163 /* LOCKING: the caller holds the lock for this domain */
1164 void
1165 mono_domain_add_class_static_data (MonoDomain *domain, MonoClass *klass, gpointer data, guint32 *bitmap)
1166 {
1167         /* The first entry in the array is the index of the next free slot
1168          * and the total size of the array
1169          */
1170         int next;
1171         if (domain->static_data_array) {
1172                 int size = GPOINTER_TO_INT (domain->static_data_array [1]);
1173                 next = GPOINTER_TO_INT (domain->static_data_array [0]);
1174                 if (next >= size) {
1175                         gpointer *new_array = mono_gc_alloc_fixed (sizeof (gpointer) * (size * 2), NULL);
1176                         memcpy (new_array, domain->static_data_array, sizeof (gpointer) * size);
1177                         size *= 2;
1178                         new_array [1] = GINT_TO_POINTER (size);
1179                         mono_gc_free_fixed (domain->static_data_array);
1180                         domain->static_data_array = new_array;
1181                 }
1182         } else {
1183                 int size = 32;
1184                 gpointer *new_array = mono_gc_alloc_fixed (sizeof (gpointer) * size, NULL);
1185                 next = 2;
1186                 new_array [0] = GINT_TO_POINTER (next);
1187                 new_array [1] = GINT_TO_POINTER (size);
1188                 domain->static_data_array = new_array;
1189         }
1190         domain->static_data_array [next++] = data;
1191         domain->static_data_array [0] = GINT_TO_POINTER (next);
1192 }
1193
1194 MonoImage*
1195 mono_get_corlib (void)
1196 {
1197         return mono_defaults.corlib;
1198 }
1199
1200 MonoClass*
1201 mono_get_object_class (void)
1202 {
1203         return mono_defaults.object_class;
1204 }
1205
1206 MonoClass*
1207 mono_get_byte_class (void)
1208 {
1209         return mono_defaults.byte_class;
1210 }
1211
1212 MonoClass*
1213 mono_get_void_class (void)
1214 {
1215         return mono_defaults.void_class;
1216 }
1217
1218 MonoClass*
1219 mono_get_boolean_class (void)
1220 {
1221         return mono_defaults.boolean_class;
1222 }
1223
1224 MonoClass*
1225 mono_get_sbyte_class (void)
1226 {
1227         return mono_defaults.sbyte_class;
1228 }
1229
1230 MonoClass*
1231 mono_get_int16_class (void)
1232 {
1233         return mono_defaults.int16_class;
1234 }
1235
1236 MonoClass*
1237 mono_get_uint16_class (void)
1238 {
1239         return mono_defaults.uint16_class;
1240 }
1241
1242 MonoClass*
1243 mono_get_int32_class (void)
1244 {
1245         return mono_defaults.int32_class;
1246 }
1247
1248 MonoClass*
1249 mono_get_uint32_class (void)
1250 {
1251         return mono_defaults.uint32_class;
1252 }
1253
1254 MonoClass*
1255 mono_get_intptr_class (void)
1256 {
1257         return mono_defaults.int_class;
1258 }
1259
1260 MonoClass*
1261 mono_get_uintptr_class (void)
1262 {
1263         return mono_defaults.uint_class;
1264 }
1265
1266 MonoClass*
1267 mono_get_int64_class (void)
1268 {
1269         return mono_defaults.int64_class;
1270 }
1271
1272 MonoClass*
1273 mono_get_uint64_class (void)
1274 {
1275         return mono_defaults.uint64_class;
1276 }
1277
1278 MonoClass*
1279 mono_get_single_class (void)
1280 {
1281         return mono_defaults.single_class;
1282 }
1283
1284 MonoClass*
1285 mono_get_double_class (void)
1286 {
1287         return mono_defaults.double_class;
1288 }
1289
1290 MonoClass*
1291 mono_get_char_class (void)
1292 {
1293         return mono_defaults.char_class;
1294 }
1295
1296 MonoClass*
1297 mono_get_string_class (void)
1298 {
1299         return mono_defaults.string_class;
1300 }
1301
1302 MonoClass*
1303 mono_get_enum_class (void)
1304 {
1305         return mono_defaults.enum_class;
1306 }
1307
1308 MonoClass*
1309 mono_get_array_class (void)
1310 {
1311         return mono_defaults.array_class;
1312 }
1313
1314 MonoClass*
1315 mono_get_thread_class (void)
1316 {
1317         return mono_defaults.thread_class;
1318 }
1319
1320 MonoClass*
1321 mono_get_exception_class (void)
1322 {
1323         return mono_defaults.exception_class;
1324 }
1325
1326
1327 static char* get_attribute_value (const gchar **attribute_names,
1328                                         const gchar **attribute_values,
1329                                         const char *att_name)
1330 {
1331         int n;
1332         for (n=0; attribute_names[n] != NULL; n++) {
1333                 if (strcmp (attribute_names[n], att_name) == 0)
1334                         return g_strdup (attribute_values[n]);
1335         }
1336         return NULL;
1337 }
1338
1339 static void start_element (GMarkupParseContext *context,
1340                            const gchar         *element_name,
1341                            const gchar        **attribute_names,
1342                            const gchar        **attribute_values,
1343                            gpointer             user_data,
1344                            GError             **error)
1345 {
1346         AppConfigInfo* app_config = (AppConfigInfo*) user_data;
1347
1348         if (strcmp (element_name, "configuration") == 0) {
1349                 app_config->configuration_count++;
1350                 return;
1351         }
1352         if (strcmp (element_name, "startup") == 0) {
1353                 app_config->startup_count++;
1354                 return;
1355         }
1356
1357         if (app_config->configuration_count != 1 || app_config->startup_count != 1)
1358                 return;
1359
1360         if (strcmp (element_name, "requiredRuntime") == 0) {
1361                 app_config->required_runtime = get_attribute_value (attribute_names, attribute_values, "version");
1362         } else if (strcmp (element_name, "supportedRuntime") == 0) {
1363                 char *version = get_attribute_value (attribute_names, attribute_values, "version");
1364                 app_config->supported_runtimes = g_slist_append (app_config->supported_runtimes, version);
1365         }
1366 }
1367
1368 static void end_element   (GMarkupParseContext *context,
1369                            const gchar         *element_name,
1370                            gpointer             user_data,
1371                            GError             **error)
1372 {
1373         AppConfigInfo* app_config = (AppConfigInfo*) user_data;
1374
1375         if (strcmp (element_name, "configuration") == 0) {
1376                 app_config->configuration_count--;
1377         } else if (strcmp (element_name, "startup") == 0) {
1378                 app_config->startup_count--;
1379         }
1380 }
1381
1382 static const GMarkupParser
1383 mono_parser = {
1384         start_element,
1385         end_element,
1386         NULL,
1387         NULL,
1388         NULL
1389 };
1390
1391 static AppConfigInfo *
1392 app_config_parse (const char *filename)
1393 {
1394         AppConfigInfo *app_config;
1395         GMarkupParseContext *context;
1396         char *text;
1397         gsize len;
1398
1399         struct stat buf;
1400         if (stat (filename, &buf) != 0)
1401                 return NULL;
1402
1403         app_config = g_new0 (AppConfigInfo, 1);
1404
1405         if (!g_file_get_contents (filename, &text, &len, NULL))
1406                 return NULL;
1407
1408         context = g_markup_parse_context_new (&mono_parser, 0, app_config, NULL);
1409         if (g_markup_parse_context_parse (context, text, len, NULL)) {
1410                 g_markup_parse_context_end_parse (context, NULL);
1411         }
1412         g_markup_parse_context_free (context);
1413         g_free (text);
1414         return app_config;
1415 }
1416
1417 static void
1418 app_config_free (AppConfigInfo* app_config)
1419 {
1420         char *rt;
1421         GSList *list = app_config->supported_runtimes;
1422         while (list != NULL) {
1423                 rt = (char*)list->data;
1424                 g_free (rt);
1425                 list = g_slist_next (list);
1426         }
1427         g_slist_free (app_config->supported_runtimes);
1428         g_free (app_config->required_runtime);
1429         g_free (app_config);
1430 }
1431
1432
1433 static const MonoRuntimeInfo*
1434 get_runtime_by_version (const char *version)
1435 {
1436         int n;
1437         int max = G_N_ELEMENTS (supported_runtimes);
1438
1439         for (n=0; n<max; n++) {
1440                 if (strcmp (version, supported_runtimes[n].runtime_version) == 0)
1441                         return &supported_runtimes[n];
1442         }
1443         return NULL;
1444 }
1445
1446 static void
1447 get_runtimes_from_exe (const char *exe_file, const MonoRuntimeInfo** runtimes)
1448 {
1449         AppConfigInfo* app_config;
1450         char *version;
1451         char *config_name;
1452         const MonoRuntimeInfo* runtime = NULL;
1453         MonoImage *image = NULL;
1454
1455         config_name = g_strconcat (exe_file, ".config", NULL);
1456         app_config = app_config_parse (config_name);
1457         g_free (config_name);
1458
1459         if (app_config != NULL) {
1460                 /* Check supportedRuntime elements, if none is supported, fail.
1461                  * If there are no such elements, look for a requiredRuntime element.
1462                  */
1463                 if (app_config->supported_runtimes != NULL) {
1464                         int n = 0;
1465                         GSList *list = app_config->supported_runtimes;
1466                         while (list != NULL) {
1467                                 version = (char*) list->data;
1468                                 runtime = get_runtime_by_version (version);
1469                                 if (runtime != NULL)
1470                                         runtimes [n++] = runtime;
1471                                 list = g_slist_next (list);
1472                         }
1473                         runtimes [n] = NULL;
1474                         app_config_free (app_config);
1475                         return;
1476                 }
1477
1478                 /* Check the requiredRuntime element. This is for 1.0 apps only. */
1479                 if (app_config->required_runtime != NULL) {
1480                         runtimes [0] = get_runtime_by_version (app_config->required_runtime);
1481                         runtimes [1] = NULL;
1482                         app_config_free (app_config);
1483                         return;
1484                 }
1485                 app_config_free (app_config);
1486         }
1487
1488         /* Look for a runtime with the exact version */
1489         image = mono_image_open (exe_file, NULL);
1490         if (image == NULL) {
1491                 /* The image is wrong or the file was not found. In this case return
1492                  * a default runtime and leave to the initialization method the work of
1493                  * reporting the error.
1494                  */
1495                 runtimes [0] = get_runtime_by_version (DEFAULT_RUNTIME_VERSION);
1496                 runtimes [1] = NULL;
1497                 return;
1498         }
1499
1500         /*
1501          * FIXME: This would cause us to unload the image, and it will be loaded again later.
1502          * Disabling it will mean the initial exe will not be unloaded on shutdown.
1503          */
1504         //mono_image_close (image);
1505
1506         runtimes [0] = get_runtime_by_version (image->version);
1507         runtimes [1] = NULL;
1508 }
1509
1510
1511 /**
1512  * mono_get_runtime_info:
1513  *
1514  * Returns: the version of the current runtime instance.
1515  */
1516 const MonoRuntimeInfo*
1517 mono_get_runtime_info (void)
1518 {
1519         return current_runtime;
1520 }
1521
1522 gchar *
1523 mono_debugger_check_runtime_version (const char *filename)
1524 {
1525         const MonoRuntimeInfo* runtimes [G_N_ELEMENTS (supported_runtimes) + 1];
1526         const MonoRuntimeInfo *rinfo;
1527
1528         get_runtimes_from_exe (filename, runtimes);
1529         rinfo = runtimes [0];
1530
1531         if (!rinfo)
1532                 return g_strdup_printf ("Cannot get runtime version from assembly `%s'", filename);
1533
1534         if (rinfo != current_runtime)
1535                 return g_strdup_printf ("The Mono Debugger is currently using the `%s' runtime, but "
1536                                         "the assembly `%s' requires version `%s'", current_runtime->runtime_version,
1537                                         filename, rinfo->runtime_version);
1538
1539         return NULL;
1540 }