mono/metadata/appdomain.c

   1 /*
   2  * appdomain.c: AppDomain functions
   3  *
   4  * Authors:
   5  *      Dietmar Maurer (dietmar@ximian.com)
   6  *      Patrik Torstensson
   7  *      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   8  *
   9  * (c) 2001-2003 Ximian, Inc. (http://www.ximian.com)
  10  */
  11 #undef ASSEMBLY_LOAD_DEBUG
  12 #include <config.h>
  13 #include <glib.h>
  14 #include <string.h>
  15 #include <unistd.h>
  16 #include <errno.h>
  17 #include <sys/stat.h>
  18 #include <sys/types.h>
  19
  20 #include <mono/os/gc_wrapper.h>
  21
  22 #include <mono/metadata/object.h>
  23 #include <mono/metadata/domain-internals.h>
  24 #include "mono/metadata/metadata-internals.h"
  25 #include <mono/metadata/assembly.h>
  26 #include <mono/metadata/exception.h>
  27 #include <mono/metadata/threads.h>
  28 #include <mono/metadata/socket-io.h>
  29 #include <mono/metadata/tabledefs.h>
  30 #include <mono/metadata/gc-internal.h>
  31 #include <mono/metadata/mono-gc.h>
  32 #include <mono/metadata/marshal.h>
  33 #include <mono/metadata/monitor.h>
  34 #include <mono/metadata/threadpool.h>
  35 #include <mono/metadata/mono-debug.h>
  36 #include <mono/utils/mono-uri.h>
  37 #include <mono/utils/mono-logger.h>
  38 #include <mono/utils/mono-path.h>
  39 #include <mono/utils/mono-stdlib.h>
  40 #ifdef PLATFORM_WIN32
  41 #include <direct.h>
  42 #endif
  43
  44 #define MONO_CORLIB_VERSION 54
  45
  46 CRITICAL_SECTION mono_delegate_section;
  47
  48 static gunichar2 process_guid [36];
  49 static gboolean process_guid_set = FALSE;
  50
  51 static gboolean shutting_down = FALSE;
  52
  53 static MonoAssembly *
  54 mono_domain_assembly_preload (MonoAssemblyName *aname,
  55                               gchar **assemblies_path,
  56                               gpointer user_data);
  57
  58 static MonoAssembly *
  59 mono_domain_assembly_search (MonoAssemblyName *aname,
  60                                                          gpointer user_data);
  61
  62 static MonoAssembly *
  63 mono_domain_assembly_postload_search (MonoAssemblyName *aname,
  64                                                                           gpointer user_data);
  65
  66 static void
  67 mono_domain_fire_assembly_load (MonoAssembly *assembly, gpointer user_data);
  68
  69 static void
  70 add_assemblies_to_domain (MonoDomain *domain, MonoAssembly *ass, GHashTable *hash);
  71
  72 static void
  73 mono_domain_unload (MonoDomain *domain);
  74
  75 /**
  76  * mono_runtime_init:
  77  * @domain: domain returned by mono_init ()
  78  *
  79  * Initialize the core AppDomain: this function will run also some
  80  * IL initialization code, so it needs the execution engine to be fully
  81  * operational.
  82  *
  83  * AppDomain.SetupInformation is set up in mono_runtime_exec_main, where
  84  * we know the entry_assembly.
  85  *
  86  */
  87 void
  88 mono_runtime_init (MonoDomain *domain, MonoThreadStartCB start_cb,
  89                    MonoThreadAttachCB attach_cb)
  90 {
  91         MonoAppDomainSetup *setup;
  92         MonoAppDomain *ad;
  93         MonoClass *class;
  94         MonoString *arg;
  95
  96         MONO_GC_PRE_INIT ();
  97         mono_monitor_init ();
  98         mono_thread_pool_init ();
  99         mono_marshal_init ();
 100
 101         mono_install_assembly_preload_hook (mono_domain_assembly_preload, GUINT_TO_POINTER (FALSE));
 102         mono_install_assembly_refonly_preload_hook (mono_domain_assembly_preload, GUINT_TO_POINTER (TRUE));
 103         mono_install_assembly_search_hook (mono_domain_assembly_search, GUINT_TO_POINTER (FALSE));
 104         mono_install_assembly_refonly_search_hook (mono_domain_assembly_search, GUINT_TO_POINTER (TRUE));
 105         mono_install_assembly_postload_search_hook (mono_domain_assembly_postload_search, GUINT_TO_POINTER (FALSE));
 106         mono_install_assembly_postload_refonly_search_hook (mono_domain_assembly_postload_search, GUINT_TO_POINTER (TRUE));
 107         mono_install_assembly_load_hook (mono_domain_fire_assembly_load, NULL);
 108         mono_install_lookup_dynamic_token (mono_reflection_lookup_dynamic_token);
 109
 110         mono_thread_init (start_cb, attach_cb);
 111
 112         class = mono_class_from_name (mono_defaults.corlib, "System", "AppDomainSetup");
 113         setup = (MonoAppDomainSetup *) mono_object_new (domain, class);
 114
 115         class = mono_class_from_name (mono_defaults.corlib, "System", "AppDomain");
 116         ad = (MonoAppDomain *) mono_object_new (domain, class);
 117         ad->data = domain;
 118         domain->domain = ad;
 119         domain->setup = setup;
 120
 121         InitializeCriticalSection (&mono_delegate_section);
 122
 123         mono_thread_attach (domain);
 124         mono_context_init (domain);
 125         mono_context_set (domain->default_context);
 126
 127         mono_type_initialization_init ();
 128
 129
 130         /*
 131          * Create an instance early since we can't do it when there is no memory.
 132          */
 133         arg = mono_string_new (domain, "Out of memory");
 134         domain->out_of_memory_ex = mono_exception_from_name_two_strings (mono_defaults.corlib, "System", "OutOfMemoryException", arg, NULL);
 135
 136         /*
 137          * These two are needed because the signal handlers might be executing on
 138          * an alternate stack, and Boehm GC can't handle that.
 139          */
 140         arg = mono_string_new (domain, "A null value was found where an object instance was required");
 141         domain->null_reference_ex = mono_exception_from_name_two_strings (mono_defaults.corlib, "System", "NullReferenceException", arg, NULL);
 142         arg = mono_string_new (domain, "The requested operation caused a stack overflow.");
 143         domain->stack_overflow_ex = mono_exception_from_name_two_strings (mono_defaults.corlib, "System", "StackOverflowException", arg, NULL);
 144
 145         /* GC init has to happen after thread init */
 146         mono_gc_init ();
 147
 148         mono_network_init ();
 149
 150         /* mscorlib is loaded before we install the load hook */
 151         mono_domain_fire_assembly_load (mono_defaults.corlib->assembly, NULL);
 152
 153         return;
 154 }
 155
 156 static int
 157 mono_get_corlib_version (void)
 158 {
 159         MonoClass *klass;
 160         MonoClassField *field;
 161         MonoObject *value;
 162
 163         klass = mono_class_from_name (mono_defaults.corlib, "System", "Environment");
 164         mono_class_init (klass);
 165         field = mono_class_get_field_from_name (klass, "mono_corlib_version");
 166         if (!field)
 167                 return -1;
 168         if (! (field->type->attrs & FIELD_ATTRIBUTE_STATIC))
 169                 return -1;
 170         value = mono_field_get_value_object (mono_domain_get (), field, NULL);
 171         return *(gint32*)((gchar*)value + sizeof (MonoObject));
 172 }
 173
 174 const char*
 175 mono_check_corlib_version (void)
 176 {
 177         int version = mono_get_corlib_version ();
 178         if (version != MONO_CORLIB_VERSION)
 179                 return g_strdup_printf ("expected corlib version %d, found %d.", MONO_CORLIB_VERSION, version);
 180         else
 181                 return NULL;
 182 }
 183
 184 void
 185 mono_context_init (MonoDomain *domain)
 186 {
 187         MonoClass *class;
 188         MonoAppContext *context;
 189
 190         class = mono_class_from_name (mono_defaults.corlib, "System.Runtime.Remoting.Contexts", "Context");
 191         context = (MonoAppContext *) mono_object_new (domain, class);
 192         context->domain_id = domain->domain_id;
 193         context->context_id = 0;
 194         domain->default_context = context;
 195 }
 196
 197 /**
 198  * mono_runtime_cleanup:
 199  * @domain: unused.
 200  *
 201  * Internal routine.
 202  *
 203  * This must not be called while there are still running threads executing
 204  * managed code.
 205  */
 206 void
 207 mono_runtime_cleanup (MonoDomain *domain)
 208 {
 209         shutting_down = TRUE;
 210
 211         /* This ends up calling any pending pending (for at most 2 seconds) */
 212         mono_gc_cleanup ();
 213
 214         mono_thread_cleanup ();
 215
 216         mono_network_cleanup ();
 217
 218         mono_marshal_cleanup ();
 219
 220         mono_type_initialization_cleanup ();
 221
 222         mono_monitor_cleanup ();
 223 }
 224
 225 static MonoDomainFunc quit_function = NULL;
 226
 227 void
 228 mono_install_runtime_cleanup (MonoDomainFunc func)
 229 {
 230         quit_function = func;
 231 }
 232
 233 void
 234 mono_runtime_quit ()
 235 {
 236         if (quit_function != NULL)
 237                 quit_function (mono_get_root_domain (), NULL);
 238 }
 239
 240 /**
 241  * mono_runtime_set_shutting_down:
 242  *
 243  * Invoked by System.Environment.Exit to flag that the runtime
 244  * is shutting down.
 245  */
 246 void
 247 mono_runtime_set_shutting_down (void)
 248 {
 249         shutting_down = TRUE;
 250 }
 251
 252 /**
 253  * mono_runtime_is_shutting_down:
 254  *
 255  * Returns whether the runtime has been flagged for shutdown.
 256  *
 257  * This is consumed by the P:System.Environment.HasShutdownStarted
 258  * property.
 259  *
 260  */
 261 gboolean
 262 mono_runtime_is_shutting_down (void)
 263 {
 264         return shutting_down;
 265 }
 266
 267 /**
 268  * mono_domain_has_type_resolve:
 269  * @domain: application domains being looked up
 270  *
 271  * Returns true if the AppDomain.TypeResolve field has been
 272  * set.
 273  */
 274 gboolean
 275 mono_domain_has_type_resolve (MonoDomain *domain)
 276 {
 277         static MonoClassField *field = NULL;
 278         MonoObject *o;
 279
 280         if (field == NULL) {
 281                 field = mono_class_get_field_from_name (mono_defaults.appdomain_class, "TypeResolve");
 282                 g_assert (field);
 283         }
 284
 285         mono_field_get_value ((MonoObject*)(domain->domain), field, &o);
 286         return o != NULL;
 287 }
 288
 289 /**
 290  * mono_domain_try_type_resolve:
 291  * @domain: application domainwhere the name where the type is going to be resolved
 292  * @name: the name of the type to resolve or NULL.
 293  * @tb: A System.Reflection.Emit.TypeBuilder, used if name is NULL.
 294  *
 295  * This routine invokes the internal System.AppDomain.DoTypeResolve and returns
 296  * the assembly that matches name.
 297  *
 298  * If @name is null, the value of ((TypeBuilder)tb).FullName is used instead
 299  *
 300  * Returns: A MonoReflectionAssembly or NULL if not found
 301  */
 302 MonoReflectionAssembly *
 303 mono_domain_try_type_resolve (MonoDomain *domain, char *name, MonoObject *tb)
 304 {
 305         MonoClass *klass;
 306         void *params [1];
 307         static MonoMethod *method = NULL;
 308
 309         g_assert (domain != NULL && ((name != NULL) || (tb != NULL)));
 310
 311         if (method == NULL) {
 312                 klass = domain->domain->mbr.obj.vtable->klass;
 313                 g_assert (klass);
 314
 315                 method = mono_class_get_method_from_name (klass, "DoTypeResolve", -1);
 316                 if (method == NULL) {
 317                         g_warning ("Method AppDomain.DoTypeResolve not found.\n");
 318                         return NULL;
 319                 }
 320         }
 321
 322         if (name)
 323                 *params = (MonoObject*)mono_string_new (mono_domain_get (), name);
 324         else
 325                 *params = tb;
 326         return (MonoReflectionAssembly *) mono_runtime_invoke (method, domain->domain, params, NULL);
 327 }
 328
 329 /**
 330  * mono_domain_owns_vtable_slot:
 331  *
 332  *  Returns whenever VTABLE_SLOT is inside a vtable which belongs to DOMAIN.
 333  */
 334 gboolean
 335 mono_domain_owns_vtable_slot (MonoDomain *domain, gpointer vtable_slot)
 336 {
 337         gboolean res;
 338
 339         mono_domain_lock (domain);
 340         res = mono_mempool_contains_addr (domain->mp, vtable_slot);
 341         mono_domain_unlock (domain);
 342         return res;
 343 }
 344
 345 /**
 346  * mono_domain_set:
 347  * @domain: domain
 348  * @force: force setting.
 349  *
 350  * Set the current appdomain to @domain. If @force is set, set it even
 351  * if it is being unloaded.
 352  *
 353  * Returns:
 354  *   TRUE on success;
 355  *   FALSE if the domain is unloaded
 356  */
 357 gboolean
 358 mono_domain_set (MonoDomain *domain, gboolean force)
 359 {
 360         if (!force && domain->state == MONO_APPDOMAIN_UNLOADED)
 361                 return FALSE;
 362
 363         mono_domain_set_internal (domain);
 364
 365         return TRUE;
 366 }
 367
 368 MonoObject *
 369 ves_icall_System_AppDomain_GetData (MonoAppDomain *ad, MonoString *name)
 370 {
 371         MonoDomain *add;
 372         MonoObject *o;
 373         char *str;
 374
 375         MONO_ARCH_SAVE_REGS;
 376
 377         g_assert (ad != NULL);
 378         add = ad->data;
 379         g_assert (add != NULL);
 380
 381         if (name == NULL)
 382                 mono_raise_exception (mono_get_exception_argument_null ("name"));
 383
 384         str = mono_string_to_utf8 (name);
 385
 386         mono_domain_lock (add);
 387
 388         if (!strcmp (str, "APPBASE"))
 389                 o = (MonoObject *)add->setup->application_base;
 390         else if (!strcmp (str, "APP_CONFIG_FILE"))
 391                 o = (MonoObject *)add->setup->configuration_file;
 392         else if (!strcmp (str, "DYNAMIC_BASE"))
 393                 o = (MonoObject *)add->setup->dynamic_base;
 394         else if (!strcmp (str, "APP_NAME"))
 395                 o = (MonoObject *)add->setup->application_name;
 396         else if (!strcmp (str, "CACHE_BASE"))
 397                 o = (MonoObject *)add->setup->cache_path;
 398         else if (!strcmp (str, "PRIVATE_BINPATH"))
 399                 o = (MonoObject *)add->setup->private_bin_path;
 400         else if (!strcmp (str, "BINPATH_PROBE_ONLY"))
 401                 o = (MonoObject *)add->setup->private_bin_path_probe;
 402         else if (!strcmp (str, "SHADOW_COPY_DIRS"))
 403                 o = (MonoObject *)add->setup->shadow_copy_directories;
 404         else if (!strcmp (str, "FORCE_CACHE_INSTALL"))
 405                 o = (MonoObject *)add->setup->shadow_copy_files;
 406         else
 407                 o = mono_g_hash_table_lookup (add->env, name);
 408
 409         mono_domain_unlock (add);
 410         g_free (str);
 411
 412         if (!o)
 413                 return NULL;
 414
 415         return o;
 416 }
 417
 418 void
 419 ves_icall_System_AppDomain_SetData (MonoAppDomain *ad, MonoString *name, MonoObject *data)
 420 {
 421         MonoDomain *add;
 422
 423         MONO_ARCH_SAVE_REGS;
 424
 425         g_assert (ad != NULL);
 426         add = ad->data;
 427         g_assert (add != NULL);
 428
 429         if (name == NULL)
 430                 mono_raise_exception (mono_get_exception_argument_null ("name"));
 431
 432         mono_domain_lock (add);
 433
 434         mono_g_hash_table_insert (add->env, name, data);
 435
 436         mono_domain_unlock (add);
 437 }
 438
 439 MonoAppDomainSetup *
 440 ves_icall_System_AppDomain_getSetup (MonoAppDomain *ad)
 441 {
 442         MONO_ARCH_SAVE_REGS;
 443
 444         g_assert (ad != NULL);
 445         g_assert (ad->data != NULL);
 446
 447         return ad->data->setup;
 448 }
 449
 450 MonoString *
 451 ves_icall_System_AppDomain_getFriendlyName (MonoAppDomain *ad)
 452 {
 453         MONO_ARCH_SAVE_REGS;
 454
 455         g_assert (ad != NULL);
 456         g_assert (ad->data != NULL);
 457
 458         return mono_string_new (ad->data, ad->data->friendly_name);
 459 }
 460
 461 MonoAppDomain *
 462 ves_icall_System_AppDomain_getCurDomain ()
 463 {
 464         MonoDomain *add = mono_domain_get ();
 465
 466         MONO_ARCH_SAVE_REGS;
 467
 468         return add->domain;
 469 }
 470
 471 MonoAppDomain *
 472 ves_icall_System_AppDomain_getRootDomain ()
 473 {
 474         MonoDomain *root = mono_get_root_domain ();
 475
 476         MONO_ARCH_SAVE_REGS;
 477
 478         return root->domain;
 479 }
 480
 481 MonoAppDomain *
 482 ves_icall_System_AppDomain_createDomain (MonoString *friendly_name, MonoAppDomainSetup *setup)
 483 {
 484         MonoClass *adclass;
 485         MonoAppDomain *ad;
 486         MonoDomain *data;
 487
 488         MONO_ARCH_SAVE_REGS;
 489
 490         adclass = mono_class_from_name (mono_defaults.corlib, "System", "AppDomain");
 491
 492         /* FIXME: pin all those objects */
 493         data = mono_domain_create();
 494
 495         ad = (MonoAppDomain *) mono_object_new (data, adclass);
 496         ad->data = data;
 497         data->domain = ad;
 498         data->setup = setup;
 499         data->friendly_name = mono_string_to_utf8 (friendly_name);
 500         data->out_of_memory_ex = mono_exception_from_name_domain (data, mono_defaults.corlib, "System", "OutOfMemoryException");
 501
 502         if (!setup->application_base) {
 503                 /* Inherit from the root domain since MS.NET does this */
 504                 MonoDomain *root = mono_get_root_domain ();
 505                 if (root->setup->application_base)
 506                         MONO_OBJECT_SETREF (setup, application_base, mono_string_new_utf16 (data, mono_string_chars (root->setup->application_base), mono_string_length (root->setup->application_base)));
 507         }
 508
 509         mono_context_init (data);
 510
 511         add_assemblies_to_domain (data, mono_defaults.corlib->assembly, NULL);
 512
 513         return ad;
 514 }
 515
 516 MonoArray *
 517 ves_icall_System_AppDomain_GetAssemblies (MonoAppDomain *ad, MonoBoolean refonly)
 518 {
 519         MonoDomain *domain = ad->data;
 520         MonoAssembly* ass;
 521         static MonoClass *System_Reflection_Assembly;
 522         MonoArray *res;
 523         GSList *tmp;
 524         int i, count;
 525
 526         MONO_ARCH_SAVE_REGS;
 527
 528         if (!System_Reflection_Assembly)
 529                 System_Reflection_Assembly = mono_class_from_name (
 530                         mono_defaults.corlib, "System.Reflection", "Assembly");
 531
 532         count = 0;
 533         /* Need to skip internal assembly builders created by remoting */
 534         mono_domain_assemblies_lock (domain);
 535         for (tmp = domain->domain_assemblies; tmp; tmp = tmp->next) {
 536                 ass = tmp->data;
 537                 if (refonly && !ass->ref_only)
 538                         continue;
 539                 if (!ass->corlib_internal)
 540                         count++;
 541         }
 542         res = mono_array_new (domain, System_Reflection_Assembly, count);
 543         i = 0;
 544         for (tmp = domain->domain_assemblies; tmp; tmp = tmp->next) {
 545                 ass = tmp->data;
 546                 if (refonly && !ass->ref_only)
 547                         continue;
 548                 if (ass->corlib_internal)
 549                         continue;
 550                 mono_array_setref (res, i, mono_assembly_get_object (domain, ass));
 551                 ++i;
 552         }
 553         mono_domain_assemblies_unlock (domain);
 554
 555         return res;
 556 }
 557
 558 static MonoReflectionAssembly *
 559 try_assembly_resolve (MonoDomain *domain, MonoString *fname, gboolean refonly)
 560 {
 561         MonoClass *klass;
 562         MonoMethod *method;
 563         MonoBoolean isrefonly;
 564         gpointer params [2];
 565
 566         g_assert (domain != NULL && fname != NULL);
 567
 568         klass = domain->domain->mbr.obj.vtable->klass;
 569         g_assert (klass);
 570
 571         method = mono_class_get_method_from_name (klass, "DoAssemblyResolve", -1);
 572         if (method == NULL) {
 573                 g_warning ("Method AppDomain.DoAssemblyResolve not found.\n");
 574                 return NULL;
 575         }
 576
 577         isrefonly = refonly ? 1 : 0;
 578         params [0] = fname;
 579         params [1] = &isrefonly;
 580         return (MonoReflectionAssembly *) mono_runtime_invoke (method, domain->domain, params, NULL);
 581 }
 582
 583 static MonoAssembly *
 584 mono_domain_assembly_postload_search (MonoAssemblyName *aname,
 585                                                                           gpointer user_data)
 586 {
 587         gboolean refonly = GPOINTER_TO_UINT (user_data);
 588         MonoReflectionAssembly *assembly;
 589         MonoDomain *domain = mono_domain_get ();
 590         char *aname_str;
 591
 592         aname_str = mono_stringify_assembly_name (aname);
 593
 594         /* FIXME: We invoke managed code here, so there is a potential for deadlocks */
 595         assembly = try_assembly_resolve (domain, mono_string_new (domain, aname_str), refonly);
 596
 597         g_free (aname_str);
 598
 599         if (assembly)
 600                 return assembly->assembly;
 601         else
 602                 return NULL;
 603 }
 604
 605 /*
 606  * LOCKING: assumes assemblies_lock in the domain is already locked.
 607  */
 608 static void
 609 add_assemblies_to_domain (MonoDomain *domain, MonoAssembly *ass, GHashTable *ht)
 610 {
 611         gint i;
 612         GSList *tmp;
 613         gboolean destroy_ht = FALSE;
 614
 615         if (!ass->aname.name)
 616                 return;
 617
 618         if (!ht) {
 619                 ht = g_hash_table_new (mono_aligned_addr_hash, NULL);
 620                 destroy_ht = TRUE;
 621         }
 622
 623         /* FIXME: handle lazy loaded assemblies */
 624         for (tmp = domain->domain_assemblies; tmp; tmp = tmp->next) {
 625                 g_hash_table_insert (ht, tmp->data, tmp->data);
 626         }
 627         if (!g_hash_table_lookup (ht, ass)) {
 628                 mono_assembly_addref (ass);
 629                 g_hash_table_insert (ht, ass, ass);
 630                 domain->domain_assemblies = g_slist_prepend (domain->domain_assemblies, ass);
 631                 mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY, "Assembly %s %p added to domain %s, ref_count=%d\n", ass->aname.name, ass, domain->friendly_name, ass->ref_count);
 632         }
 633
 634         if (ass->image->references) {
 635                 for (i = 0; ass->image->references [i] != NULL; i++) {
 636                         if (!g_hash_table_lookup (ht, ass->image->references [i])) {
 637                                 add_assemblies_to_domain (domain, ass->image->references [i], ht);
 638                         }
 639                 }
 640         }
 641         if (destroy_ht)
 642                 g_hash_table_destroy (ht);
 643 }
 644
 645 static void
 646 mono_domain_fire_assembly_load (MonoAssembly *assembly, gpointer user_data)
 647 {
 648         static MonoClassField *assembly_load_field;
 649         static MonoMethod *assembly_load_method;
 650         MonoDomain *domain = mono_domain_get ();
 651         MonoReflectionAssembly *ref_assembly;
 652         MonoClass *klass;
 653         gpointer load_value;
 654         void *params [1];
 655
 656         if (!domain->domain)
 657                 /* This can happen during startup */
 658                 return;
 659 #ifdef ASSEMBLY_LOAD_DEBUG
 660         fprintf (stderr, "Loading %s into domain %s\n", assembly->aname.name, domain->friendly_name);
 661 #endif
 662         klass = domain->domain->mbr.obj.vtable->klass;
 663
 664         mono_domain_assemblies_lock (domain);
 665         add_assemblies_to_domain (domain, assembly, NULL);
 666         mono_domain_assemblies_unlock (domain);
 667
 668         if (assembly_load_field == NULL) {
 669                 assembly_load_field = mono_class_get_field_from_name (klass, "AssemblyLoad");
 670                 g_assert (assembly_load_field);
 671         }
 672
 673         mono_field_get_value ((MonoObject*) domain->domain, assembly_load_field, &load_value);
 674         if (load_value == NULL) {
 675                 /* No events waiting to be triggered */
 676                 return;
 677         }
 678
 679         ref_assembly = mono_assembly_get_object (domain, assembly);
 680         g_assert (ref_assembly);
 681
 682         if (assembly_load_method == NULL) {
 683                 assembly_load_method = mono_class_get_method_from_name (klass, "DoAssemblyLoad", -1);
 684                 g_assert (assembly_load_method);
 685         }
 686
 687         *params = ref_assembly;
 688         mono_runtime_invoke (assembly_load_method, domain->domain, params, NULL);
 689 }
 690
 691 static void
 692 set_domain_search_path (MonoDomain *domain)
 693 {
 694         MonoAppDomainSetup *setup;
 695         gchar **tmp;
 696         gchar *utf8;
 697         gint i;
 698         gint npaths = 0;
 699         gchar **pvt_split = NULL;
 700         GError *error = NULL;
 701         gint appbaselen = -1;
 702
 703         if ((domain->search_path != NULL) && !domain->setup->path_changed)
 704                 return;
 705         if (!domain->setup)
 706                 return;
 707
 708         setup = domain->setup;
 709         if (!setup->application_base)
 710                 return; /* Must set application base to get private path working */
 711
 712         npaths++;
 713         if (setup->private_bin_path) {
 714                 utf8 = mono_string_to_utf8 (setup->private_bin_path);
 715                 pvt_split = g_strsplit (utf8, G_SEARCHPATH_SEPARATOR_S, 1000);
 716                 g_free (utf8);
 717                 for (tmp = pvt_split; *tmp; tmp++, npaths++);
 718         }
 719
 720         if (!npaths) {
 721                 if (pvt_split)
 722                         g_strfreev (pvt_split);
 723                 /*
 724                  * Don't do this because the first time is called, the domain
 725                  * setup is not finished.
 726                  *
 727                  * domain->search_path = g_malloc (sizeof (char *));
 728                  * domain->search_path [0] = NULL;
 729                 */
 730                 return;
 731         }
 732
 733         if (domain->search_path)
 734                 g_strfreev (domain->search_path);
 735
 736         domain->search_path = tmp = g_malloc ((npaths + 1) * sizeof (gchar *));
 737         tmp [npaths] = NULL;
 738
 739         *tmp = mono_string_to_utf8 (setup->application_base);
 740
 741         /* FIXME: is this needed? */
 742         if (strncmp (*tmp, "file://", 7) == 0) {
 743                 gchar *file = *tmp;
 744                 gchar *uri = *tmp;
 745                 gchar *tmpuri;
 746
 747                 if (uri [7] != '/')
 748                         uri = g_strdup_printf ("file:///%s", uri + 7);
 749
 750                 tmpuri = uri;
 751                 uri = mono_escape_uri_string (tmpuri);
 752                 *tmp = g_filename_from_uri (uri, NULL, &error);
 753                 g_free (uri);
 754
 755                 if (tmpuri != file)
 756                         g_free (tmpuri);
 757
 758                 if (error != NULL) {
 759                         g_warning ("%s\n", error->message);
 760                         g_error_free (error);
 761                         *tmp = file;
 762                 } else {
 763                         g_free (file);
 764                 }
 765         }
 766
 767         for (i = 1; pvt_split && i < npaths; i++) {
 768                 if (g_path_is_absolute (pvt_split [i - 1])) {
 769                         tmp [i] = g_strdup (pvt_split [i - 1]);
 770                 } else {
 771                         tmp [i] = g_build_filename (tmp [0], pvt_split [i - 1], NULL);
 772                 }
 773
 774                 if (strchr (tmp [i], '.')) {
 775                         gchar *reduced;
 776                         gchar *freeme;
 777
 778                         reduced = mono_path_canonicalize (tmp [i]);
 779                         if (appbaselen == -1)
 780                                 appbaselen = strlen (tmp [0]);
 781
 782                         if (strncmp (tmp [0], reduced, appbaselen)) {
 783                                 g_free (reduced);
 784                                 g_free (tmp [i]);
 785                                 tmp [i] = g_strdup ("");
 786                                 continue;
 787                         }
 788
 789                         freeme = tmp [i];
 790                         tmp [i] = reduced;
 791                         g_free (freeme);
 792                 }
 793         }
 794
 795         if (setup->private_bin_path_probe != NULL) {
 796                 g_free (tmp [0]);
 797                 tmp [0] = g_strdup ("");
 798         }
 799
 800         domain->setup->path_changed = FALSE;
 801
 802         g_strfreev (pvt_split);
 803 }
 804
 805 static gboolean
 806 shadow_copy_sibling (gchar *src, gint srclen, const char *extension, gchar *target, gint targetlen, gint tail_len)
 807 {
 808         guint16 *orig, *dest;
 809         gboolean copy_result;
 810
 811         strcpy (src + srclen - tail_len, extension);
 812         if (!g_file_test (src, G_FILE_TEST_IS_REGULAR))
 813                 return TRUE;
 814         orig = g_utf8_to_utf16 (src, strlen (src), NULL, NULL, NULL);
 815
 816         strcpy (target + targetlen - tail_len, extension);
 817         dest = g_utf8_to_utf16 (target, strlen (target), NULL, NULL, NULL);
 818
 819         copy_result = CopyFile (orig, dest, FALSE);
 820         g_free (orig);
 821         g_free (dest);
 822
 823         return copy_result;
 824 }
 825
 826 static gint32
 827 get_cstring_hash (const char *str)
 828 {
 829         int len, i;
 830         const char *p;
 831         gint32 h = 0;
 832
 833         if (!str || !str [0])
 834                 return 0;
 835
 836         len = strlen (str);
 837         p = str;
 838         for (i = 0; i < len; i++) {
 839                 h = (h << 5) - h + *p;
 840                 p++;
 841         }
 842
 843         return h;
 844 }
 845
 846 static char *
 847 get_shadow_assembly_location (const char *filename)
 848 {
 849         gint32 hash = 0, hash2 = 0;
 850         char name_hash [9];
 851         char path_hash [19];
 852         char *bname = g_path_get_basename (filename);
 853         MonoDomain *domain = mono_domain_get ();
 854
 855         hash = get_cstring_hash (bname);
 856         hash2 = get_cstring_hash (g_path_get_dirname (filename));
 857         g_snprintf (name_hash, sizeof (name_hash), "%08x", hash);
 858         g_snprintf (path_hash, sizeof (path_hash), "%08x_%08x", hash ^ hash2, hash2);
 859         return g_build_filename (mono_string_to_utf8 (domain->setup->dynamic_base),
 860                                  "assembly",
 861                                  "shadow",
 862                                  name_hash,
 863                                  path_hash,
 864                                  bname,
 865                                  NULL);
 866 }
 867
 868 static gboolean
 869 ensure_directory_exists (const char *filename)
 870 {
 871 #ifdef PLATFORM_WIN32
 872         gchar *dir_utf8 = g_path_get_dirname (filename);
 873         gunichar2 *p;
 874         gunichar2 *dir_utf16 = NULL;
 875         int retval;
 876
 877         if (!dir_utf8 || !dir_utf8 [0])
 878                 return FALSE;
 879
 880         dir_utf16 = g_utf8_to_utf16 (dir_utf8, strlen (dir_utf8), NULL, NULL, NULL);
 881         g_free (dir_utf8);
 882
 883         if (!dir_utf16)
 884                 return FALSE;
 885
 886         p = dir_utf16;
 887
 888         /* make life easy and only use one directory seperator */
 889         while (*p != '\0')
 890         {
 891                 if (*p == '/')
 892                         *p = '\\';
 893                 p++;
 894         }
 895
 896         p = dir_utf16;
 897
 898         /* get past C:\ )*/
 899         while (*p++ != '\\')
 900         {
 901         }
 902
 903         while (1) {
 904                 BOOL bRet = FALSE;
 905                 p = wcschr (p, '\\');
 906                 if (p)
 907                         *p = '\0';
 908                 retval = _wmkdir (dir_utf16);
 909                 if (retval != 0 && errno != EEXIST) {
 910                         g_free (dir_utf16);
 911                         return FALSE;
 912                 }
 913                 if (!p)
 914                         break;
 915                 *p++ = '\\';
 916         }
 917
 918         g_free (dir_utf16);
 919         return TRUE;
 920 #else
 921         char *p;
 922         gchar *dir = g_path_get_dirname (filename);
 923         int retval;
 924
 925         if (!dir || !dir [0])
 926                 return FALSE;
 927
 928         p = dir;
 929         while (*p == '/')
 930                 p++;
 931
 932         while (1) {
 933                 p = strchr (p, '/');
 934                 if (p)
 935                         *p = '\0';
 936                 retval = mkdir (dir, 0777);
 937                 if (retval != 0 && errno != EEXIST) {
 938                         g_free (dir);
 939                         return FALSE;
 940                 }
 941                 if (!p)
 942                         break;
 943                 *p++ = '/';
 944         }
 945
 946         g_free (dir);
 947         return TRUE;
 948 #endif
 949 }
 950
 951 static char *
 952 make_shadow_copy (const char *filename)
 953 {
 954         gchar *sibling_source, *sibling_target;
 955         gint sibling_source_len, sibling_target_len;
 956         guint16 *orig, *dest;
 957         char *shadow;
 958         gboolean copy_result;
 959         MonoException *exc;
 960
 961         shadow = get_shadow_assembly_location (filename);
 962         if (ensure_directory_exists (shadow) == FALSE) {
 963                 exc = mono_get_exception_execution_engine ("Failed to create shadow copy (ensure directory exists).");
 964                 mono_raise_exception (exc);
 965         }
 966
 967         orig = g_utf8_to_utf16 (filename, strlen (filename), NULL, NULL, NULL);
 968         dest = g_utf8_to_utf16 (shadow, strlen (shadow), NULL, NULL, NULL);
 969         copy_result = CopyFile (orig, dest, FALSE);
 970         g_free (dest);
 971         g_free (orig);
 972
 973         if (copy_result == FALSE) {
 974                 g_free (shadow);
 975                 exc = mono_get_exception_execution_engine ("Failed to create shadow copy (CopyFile).");
 976                 mono_raise_exception (exc);
 977         }
 978
 979         /* attempt to copy .mdb, .config if they exist */
 980         sibling_source = g_strconcat (filename, ".config", NULL);
 981         sibling_source_len = strlen (sibling_source);
 982         sibling_target = g_strconcat (shadow, ".config", NULL);
 983         sibling_target_len = strlen (sibling_target);
 984
 985         copy_result = shadow_copy_sibling (sibling_source, sibling_source_len, ".mdb", sibling_target, sibling_target_len, 7);
 986         if (copy_result == TRUE)
 987                 copy_result = shadow_copy_sibling (sibling_source, sibling_source_len, ".config", sibling_target, sibling_target_len, 7);
 988
 989         g_free (sibling_source);
 990         g_free (sibling_target);
 991
 992         if (copy_result == FALSE)  {
 993                 g_free (shadow);
 994                 exc = mono_get_exception_execution_engine ("Failed to create shadow copy of sibling data (CopyFile).");
 995                 mono_raise_exception (exc);
 996         }
 997
 998         return shadow;
 999 }
1000
1001 static gboolean
1002 try_load_from (MonoAssembly **assembly, const gchar *path1, const gchar *path2,
1003                                         const gchar *path3, const gchar *path4,
1004                                         gboolean refonly, gboolean is_private)
1005 {
1006
1007         gchar *fullpath;
1008
1009         *assembly = NULL;
1010         fullpath = g_build_filename (path1, path2, path3, path4, NULL);
1011         if (g_file_test (fullpath, G_FILE_TEST_IS_REGULAR)) {
1012                 if (is_private) {
1013                         char *new_path = make_shadow_copy (fullpath);
1014                         g_free (fullpath);
1015                         fullpath = new_path;
1016                 }
1017
1018                 *assembly = mono_assembly_open_full (fullpath, NULL, refonly);
1019         }
1020
1021         g_free (fullpath);
1022         return (*assembly != NULL);
1023 }
1024
1025 static MonoAssembly *
1026 real_load (gchar **search_path, const gchar *culture, const gchar *name, gboolean refonly)
1027 {
1028         MonoAssembly *result = NULL;
1029         gchar **path;
1030         gchar *filename;
1031         const gchar *local_culture;
1032         gint len;
1033         gboolean is_private = FALSE;
1034
1035         if (!culture || *culture == '\0') {
1036                 local_culture = "";
1037         } else {
1038                 local_culture = culture;
1039         }
1040
1041         filename =  g_strconcat (name, ".dll", NULL);
1042         len = strlen (filename);
1043
1044         for (path = search_path; *path; path++) {
1045                 if (**path == '\0') {
1046                         is_private = TRUE;
1047                         continue; /* Ignore empty ApplicationBase */
1048                 }
1049
1050                 /* See test cases in bug #58992 and bug #57710 */
1051                 /* 1st try: [culture]/[name].dll (culture may be empty) */
1052                 strcpy (filename + len - 4, ".dll");
1053                 if (try_load_from (&result, *path, local_culture, "", filename, refonly, is_private))
1054                         break;
1055
1056                 /* 2nd try: [culture]/[name].exe (culture may be empty) */
1057                 strcpy (filename + len - 4, ".exe");
1058                 if (try_load_from (&result, *path, local_culture, "", filename, refonly, is_private))
1059                         break;
1060
1061                 /* 3rd try: [culture]/[name]/[name].dll (culture may be empty) */
1062                 strcpy (filename + len - 4, ".dll");
1063                 if (try_load_from (&result, *path, local_culture, name, filename, refonly, is_private))
1064                         break;
1065
1066                 /* 4th try: [culture]/[name]/[name].exe (culture may be empty) */
1067                 strcpy (filename + len - 4, ".exe");
1068                 if (try_load_from (&result, *path, local_culture, name, filename, refonly, is_private))
1069                         break;
1070         }
1071
1072         g_free (filename);
1073         return result;
1074 }
1075
1076 /*
1077  * Try loading the assembly from ApplicationBase and PrivateBinPath
1078  * and then from assemblies_path if any.
1079  */
1080 static MonoAssembly *
1081 mono_domain_assembly_preload (MonoAssemblyName *aname,
1082                               gchar **assemblies_path,
1083                               gpointer user_data)
1084 {
1085         MonoDomain *domain = mono_domain_get ();
1086         MonoAssembly *result = NULL;
1087         gboolean refonly = GPOINTER_TO_UINT (user_data);
1088
1089         set_domain_search_path (domain);
1090
1091         if (domain->search_path && domain->search_path [0] != NULL) {
1092                 result = real_load (domain->search_path, aname->culture, aname->name, refonly);
1093         }
1094
1095         if (result == NULL && assemblies_path && assemblies_path [0] != NULL) {
1096                 result = real_load (assemblies_path, aname->culture, aname->name, refonly);
1097         }
1098
1099         return result;
1100 }
1101
1102 /*
1103  * Check whenever a given assembly was already loaded in the current appdomain.
1104  */
1105 static MonoAssembly *
1106 mono_domain_assembly_search (MonoAssemblyName *aname,
1107                                                          gpointer user_data)
1108 {
1109         MonoDomain *domain = mono_domain_get ();
1110         GSList *tmp;
1111         MonoAssembly *ass;
1112         gboolean refonly = GPOINTER_TO_UINT (user_data);
1113
1114         mono_domain_assemblies_lock (domain);
1115         for (tmp = domain->domain_assemblies; tmp; tmp = tmp->next) {
1116                 ass = tmp->data;
1117                 /* Dynamic assemblies can't match here in MS.NET */
1118                 if (ass->dynamic || refonly != ass->ref_only || !mono_assembly_names_equal (aname, &ass->aname))
1119                         continue;
1120
1121                 mono_domain_assemblies_unlock (domain);
1122                 return ass;
1123         }
1124         mono_domain_assemblies_unlock (domain);
1125
1126         return NULL;
1127 }
1128
1129 MonoReflectionAssembly *
1130 ves_icall_System_Reflection_Assembly_LoadFrom (MonoString *fname, MonoBoolean refOnly)
1131 {
1132         MonoDomain *domain = mono_domain_get ();
1133         char *name, *filename;
1134         MonoImageOpenStatus status = MONO_IMAGE_OK;
1135         MonoAssembly *ass;
1136
1137         MONO_ARCH_SAVE_REGS;
1138
1139         if (fname == NULL) {
1140                 MonoException *exc = mono_get_exception_argument_null ("assemblyFile");
1141                 mono_raise_exception (exc);
1142         }
1143
1144         name = filename = mono_string_to_utf8 (fname);
1145
1146         ass = mono_assembly_open_full (filename, &status, refOnly);
1147
1148         if (!ass){
1149                 MonoException *exc;
1150
1151                 if (status == MONO_IMAGE_IMAGE_INVALID)
1152                         exc = mono_get_exception_bad_image_format2 (NULL, fname);
1153                 else
1154                         exc = mono_get_exception_file_not_found2 (NULL, fname);
1155                 g_free (name);
1156                 mono_raise_exception (exc);
1157         }
1158
1159         g_free (name);
1160
1161         return mono_assembly_get_object (domain, ass);
1162 }
1163
1164 MonoReflectionAssembly *
1165 ves_icall_System_AppDomain_LoadAssemblyRaw (MonoAppDomain *ad,
1166                                                                                         MonoArray *raw_assembly,
1167                                                                                         MonoArray *raw_symbol_store, MonoObject *evidence,
1168                                                                                         MonoBoolean refonly)
1169 {
1170         MonoAssembly *ass;
1171         MonoReflectionAssembly *refass = NULL;
1172         MonoDomain *domain = ad->data;
1173         MonoImageOpenStatus status;
1174         guint32 raw_assembly_len = mono_array_length (raw_assembly);
1175         MonoImage *image = mono_image_open_from_data_full (mono_array_addr (raw_assembly, gchar, 0), raw_assembly_len, TRUE, NULL, refonly);
1176
1177         if (!image) {
1178                 mono_raise_exception (mono_get_exception_bad_image_format (""));
1179                 return NULL;
1180         }
1181
1182         if (raw_symbol_store != NULL)
1183                 mono_debug_init_2_memory (image, mono_array_addr (raw_symbol_store, guint8, 0), mono_array_length (raw_symbol_store));
1184
1185         ass = mono_assembly_load_from_full (image, "", &status, refonly);
1186
1187
1188         if (!ass) {
1189                 mono_image_close (image);
1190                 mono_raise_exception (mono_get_exception_bad_image_format (""));
1191                 return NULL;
1192         }
1193
1194         refass = mono_assembly_get_object (domain, ass);
1195         MONO_OBJECT_SETREF (refass, evidence, evidence);
1196         return refass;
1197 }
1198
1199 MonoReflectionAssembly *
1200 ves_icall_System_AppDomain_LoadAssembly (MonoAppDomain *ad,  MonoString *assRef, MonoObject *evidence, MonoBoolean refOnly)
1201 {
1202         MonoDomain *domain = ad->data;
1203         MonoImageOpenStatus status = MONO_IMAGE_OK;
1204         MonoAssembly *ass;
1205         MonoAssemblyName aname;
1206         MonoReflectionAssembly *refass = NULL;
1207         gchar *name;
1208         gboolean parsed;
1209
1210         MONO_ARCH_SAVE_REGS;
1211
1212         g_assert (assRef != NULL);
1213
1214         name = mono_string_to_utf8 (assRef);
1215         parsed = mono_assembly_name_parse (name, &aname);
1216         g_free (name);
1217
1218         if (!parsed) {
1219                 MonoException *exc;
1220
1221                 /* This is a parse error... */
1222                 exc = mono_get_exception_file_not_found2 (NULL, assRef);
1223                 mono_raise_exception (exc);
1224         }
1225
1226         ass = mono_assembly_load_full (&aname, NULL, &status, refOnly);
1227         mono_assembly_name_free (&aname);
1228
1229         if (!ass && (refass = try_assembly_resolve (domain, assRef, refOnly)) == NULL){
1230                 /* FIXME: it doesn't make much sense since we really don't have a filename ... */
1231                 MonoException *exc = mono_get_exception_file_not_found2 (NULL, assRef);
1232                 mono_raise_exception (exc);
1233         }
1234
1235         if (refass == NULL)
1236                 refass = mono_assembly_get_object (domain, ass);
1237
1238         MONO_OBJECT_SETREF (refass, evidence, evidence);
1239         return refass;
1240 }
1241
1242 void
1243 ves_icall_System_AppDomain_InternalUnload (gint32 domain_id)
1244 {
1245         MonoDomain * domain = mono_domain_get_by_id (domain_id);
1246
1247         MONO_ARCH_SAVE_REGS;
1248
1249         if (NULL == domain) {
1250                 MonoException *exc = mono_get_exception_execution_engine ("Failed to unload domain, domain id not found");
1251                 mono_raise_exception (exc);
1252         }
1253
1254         if (domain == mono_get_root_domain ()) {
1255                 mono_raise_exception (mono_get_exception_cannot_unload_appdomain ("The default appdomain can not be unloaded."));
1256                 return;
1257         }
1258
1259         /*
1260          * Unloading seems to cause problems when running NUnit/NAnt, hence
1261          * this workaround.
1262          */
1263         if (g_getenv ("MONO_NO_UNLOAD"))
1264                 return;
1265
1266         mono_domain_unload (domain);
1267 }
1268
1269 gboolean
1270 ves_icall_System_AppDomain_InternalIsFinalizingForUnload (gint32 domain_id)
1271 {
1272         MonoDomain *domain = mono_domain_get_by_id (domain_id);
1273
1274         if (!domain)
1275                 return TRUE;
1276
1277         return mono_domain_is_unloading (domain);
1278 }
1279
1280 gint32
1281 ves_icall_System_AppDomain_ExecuteAssembly (MonoAppDomain *ad, MonoString *file,
1282                                             MonoObject *evidence, MonoArray *args)
1283 {
1284         MonoAssembly *assembly;
1285         MonoImage *image;
1286         MonoMethod *method;
1287         char *filename;
1288         gint32 res;
1289         MonoReflectionAssembly *refass;
1290
1291         MONO_ARCH_SAVE_REGS;
1292
1293         filename = mono_string_to_utf8 (file);
1294         assembly = mono_assembly_open (filename, NULL);
1295         g_free (filename);
1296
1297         if (!assembly)
1298                 mono_raise_exception (mono_get_exception_file_not_found2 (NULL, file));
1299
1300         image = assembly->image;
1301
1302         method = mono_get_method (image, mono_image_get_entry_point (image), NULL);
1303
1304         if (!method)
1305                 g_error ("No entry point method found in %s", image->name);
1306
1307         if (!args)
1308                 args = (MonoArray *) mono_array_new (ad->data, mono_defaults.string_class, 0);
1309
1310         refass = mono_assembly_get_object (ad->data, assembly);
1311         MONO_OBJECT_SETREF (refass, evidence, evidence);
1312
1313         res = mono_runtime_exec_main (method, (MonoArray *)args, NULL);
1314
1315         return res;
1316 }
1317
1318 gint32
1319 ves_icall_System_AppDomain_GetIDFromDomain (MonoAppDomain * ad)
1320 {
1321         MONO_ARCH_SAVE_REGS;
1322
1323         return ad->data->domain_id;
1324 }
1325
1326 MonoAppDomain *
1327 ves_icall_System_AppDomain_InternalSetDomain (MonoAppDomain *ad)
1328 {
1329         MonoDomain *old_domain = mono_domain_get();
1330
1331         MONO_ARCH_SAVE_REGS;
1332
1333         if (!mono_domain_set (ad->data, FALSE))
1334                 mono_raise_exception (mono_get_exception_appdomain_unloaded ());
1335
1336         return old_domain->domain;
1337 }
1338
1339 MonoAppDomain *
1340 ves_icall_System_AppDomain_InternalSetDomainByID (gint32 domainid)
1341 {
1342         MonoDomain *current_domain = mono_domain_get ();
1343         MonoDomain *domain = mono_domain_get_by_id (domainid);
1344
1345         MONO_ARCH_SAVE_REGS;
1346
1347         if (!domain || !mono_domain_set (domain, FALSE))
1348                 mono_raise_exception (mono_get_exception_appdomain_unloaded ());
1349
1350         return current_domain->domain;
1351 }
1352
1353 void
1354 ves_icall_System_AppDomain_InternalPushDomainRef (MonoAppDomain *ad)
1355 {
1356         MONO_ARCH_SAVE_REGS;
1357
1358         mono_thread_push_appdomain_ref (ad->data);
1359 }
1360
1361 void
1362 ves_icall_System_AppDomain_InternalPushDomainRefByID (gint32 domain_id)
1363 {
1364         MonoDomain *domain = mono_domain_get_by_id (domain_id);
1365
1366         MONO_ARCH_SAVE_REGS;
1367
1368         if (!domain)
1369                 /*
1370                  * Raise an exception to prevent the managed code from executing a pop
1371                  * later.
1372                  */
1373                 mono_raise_exception (mono_get_exception_appdomain_unloaded ());
1374
1375         mono_thread_push_appdomain_ref (domain);
1376 }
1377
1378 void
1379 ves_icall_System_AppDomain_InternalPopDomainRef (void)
1380 {
1381         MONO_ARCH_SAVE_REGS;
1382
1383         mono_thread_pop_appdomain_ref ();
1384 }
1385
1386 MonoAppContext *
1387 ves_icall_System_AppDomain_InternalGetContext ()
1388 {
1389         MONO_ARCH_SAVE_REGS;
1390
1391         return mono_context_get ();
1392 }
1393
1394 MonoAppContext *
1395 ves_icall_System_AppDomain_InternalGetDefaultContext ()
1396 {
1397         MONO_ARCH_SAVE_REGS;
1398
1399         return mono_domain_get ()->default_context;
1400 }
1401
1402 MonoAppContext *
1403 ves_icall_System_AppDomain_InternalSetContext (MonoAppContext *mc)
1404 {
1405         MonoAppContext *old_context = mono_context_get ();
1406
1407         MONO_ARCH_SAVE_REGS;
1408
1409         mono_context_set (mc);
1410
1411         return old_context;
1412 }
1413
1414 MonoString *
1415 ves_icall_System_AppDomain_InternalGetProcessGuid (MonoString* newguid)
1416 {
1417         MonoDomain* mono_root_domain = mono_get_root_domain ();
1418         mono_domain_lock (mono_root_domain);
1419         if (process_guid_set) {
1420                 mono_domain_unlock (mono_root_domain);
1421                 return mono_string_new_utf16 (mono_domain_get (), process_guid, sizeof(process_guid)/2);
1422         }
1423         memcpy (process_guid, mono_string_chars(newguid), sizeof(process_guid));
1424         process_guid_set = TRUE;
1425         mono_domain_unlock (mono_root_domain);
1426         return newguid;
1427 }
1428
1429 gboolean
1430 mono_domain_is_unloading (MonoDomain *domain)
1431 {
1432         if (domain->state == MONO_APPDOMAIN_UNLOADING || domain->state == MONO_APPDOMAIN_UNLOADED)
1433                 return TRUE;
1434         else
1435                 return FALSE;
1436 }
1437
1438 static void
1439 clear_cached_vtable (gpointer key, gpointer value, gpointer user_data)
1440 {
1441         MonoClass *klass = (MonoClass*)key;
1442         MonoDomain *domain = (MonoDomain*)user_data;
1443         MonoClassRuntimeInfo *runtime_info;
1444
1445         runtime_info = klass->runtime_info;
1446         if (runtime_info && runtime_info->max_domain >= domain->domain_id)
1447                 runtime_info->domain_vtables [domain->domain_id] = NULL;
1448 }
1449
1450 typedef struct unload_data {
1451         MonoDomain *domain;
1452         char *failure_reason;
1453 } unload_data;
1454
1455 static guint32 WINAPI
1456 unload_thread_main (void *arg)
1457 {
1458         unload_data *data = (unload_data*)arg;
1459         MonoDomain *domain = data->domain;
1460
1461         /*
1462          * FIXME: Abort our parent thread last, so we can return a failure
1463          * indication if aborting times out.
1464          */
1465         if (!mono_threads_abort_appdomain_threads (domain, 10000)) {
1466                 data->failure_reason = g_strdup_printf ("Aborting of threads in domain %s timed out.", domain->friendly_name);
1467                 return 1;
1468         }
1469
1470         /* Finalize all finalizable objects in the doomed appdomain */
1471         if (!mono_domain_finalize (domain, 10000)) {
1472                 data->failure_reason = g_strdup_printf ("Finalization of domain %s timed out.", domain->friendly_name);
1473                 return 1;
1474         }
1475
1476         /* Clear references to our vtables in class->runtime_info.
1477          * We also hold the loader lock because we're going to change
1478          * class->runtime_info.
1479          */
1480         mono_domain_lock (domain);
1481         mono_loader_lock ();
1482         g_hash_table_foreach (domain->class_vtable_hash, clear_cached_vtable, domain);
1483         mono_loader_unlock ();
1484         mono_domain_unlock (domain);
1485
1486         mono_threads_clear_cached_culture (domain);
1487
1488         domain->state = MONO_APPDOMAIN_UNLOADED;
1489
1490         /* printf ("UNLOADED %s.\n", domain->friendly_name); */
1491
1492         /* remove from the handle table the items related to this domain */
1493         mono_gchandle_free_domain (domain);
1494
1495         mono_domain_free (domain, FALSE);
1496
1497         mono_gc_collect (mono_gc_max_generation ());
1498
1499         return 0;
1500 }
1501
1502 /*
1503  * mono_domain_unload:
1504  * @domain: The domain to unload
1505  *
1506  *  Unloads an appdomain. Follows the process outlined in:
1507  *  http://blogs.gotdotnet.com/cbrumme
1508  *
1509  *  If doing things the 'right' way is too hard or complex, we do it the
1510  *  'simple' way, which means do everything needed to avoid crashes and
1511  *  memory leaks, but not much else.
1512  */
1513 static void
1514 mono_domain_unload (MonoDomain *domain)
1515 {
1516         HANDLE thread_handle;
1517         gsize tid;
1518         guint32 res;
1519         MonoAppDomainState prev_state;
1520         MonoMethod *method;
1521         MonoObject *exc;
1522         unload_data thread_data;
1523         MonoDomain *caller_domain = mono_domain_get ();
1524
1525         /* printf ("UNLOAD STARTING FOR %s (%p) IN THREAD 0x%x.\n", domain->friendly_name, domain, GetCurrentThreadId ()); */
1526
1527         /* Atomically change our state to UNLOADING */
1528         prev_state = InterlockedCompareExchange ((gint32*)&domain->state,
1529                                                                                          MONO_APPDOMAIN_UNLOADING,
1530                                                                                          MONO_APPDOMAIN_CREATED);
1531         if (prev_state != MONO_APPDOMAIN_CREATED) {
1532                 if (prev_state == MONO_APPDOMAIN_UNLOADING)
1533                         mono_raise_exception (mono_get_exception_cannot_unload_appdomain ("Appdomain is already being unloaded."));
1534                 else
1535                         if (prev_state == MONO_APPDOMAIN_UNLOADED)
1536                                 mono_raise_exception (mono_get_exception_cannot_unload_appdomain ("Appdomain is already unloaded."));
1537                 else
1538                         g_assert_not_reached ();
1539         }
1540
1541         mono_domain_set (domain, FALSE);
1542         /* Notify OnDomainUnload listeners */
1543         method = mono_class_get_method_from_name (domain->domain->mbr.obj.vtable->klass, "DoDomainUnload", -1);
1544         g_assert (method);
1545
1546         exc = NULL;
1547         mono_runtime_invoke (method, domain->domain, NULL, &exc);
1548         if (exc) {
1549                 /* Roll back the state change */
1550                 domain->state = MONO_APPDOMAIN_CREATED;
1551                 mono_domain_set (caller_domain, FALSE);
1552                 mono_raise_exception ((MonoException*)exc);
1553         }
1554
1555         thread_data.domain = domain;
1556         thread_data.failure_reason = NULL;
1557
1558         /*
1559          * First we create a separate thread for unloading, since
1560          * we might have to abort some threads, including the current one.
1561          */
1562         /*
1563          * If we create a non-suspended thread, the runtime will hang.
1564          * See:
1565          * http://bugzilla.ximian.com/show_bug.cgi?id=27663
1566          */
1567 #if 0
1568         thread_handle = CreateThread (NULL, 0, unload_thread_main, &thread_data, 0, &tid);
1569 #else
1570         thread_handle = CreateThread (NULL, 0, (LPTHREAD_START_ROUTINE)unload_thread_main, &thread_data, CREATE_SUSPENDED, &tid);
1571         if (thread_handle == NULL) {
1572                 return;
1573         }
1574         ResumeThread (thread_handle);
1575 #endif
1576
1577         /* Wait for the thread */
1578         while ((res = WaitForSingleObjectEx (thread_handle, INFINITE, TRUE) == WAIT_IO_COMPLETION)) {
1579                 if (mono_thread_has_appdomain_ref (mono_thread_current (), domain) && (mono_thread_interruption_requested ()))
1580                         /* The unload thread tries to abort us */
1581                         /* The icall wrapper will execute the abort */
1582                         CloseHandle (thread_handle);
1583                         return;
1584         }
1585         CloseHandle (thread_handle);
1586
1587         mono_domain_set (caller_domain, FALSE);
1588
1589         if (thread_data.failure_reason) {
1590                 MonoException *ex;
1591
1592                 /* Roll back the state change */
1593                 domain->state = MONO_APPDOMAIN_CREATED;
1594
1595                 g_warning (thread_data.failure_reason);
1596
1597                 ex = mono_get_exception_cannot_unload_appdomain (thread_data.failure_reason);
1598
1599                 g_free (thread_data.failure_reason);
1600                 thread_data.failure_reason = NULL;
1601
1602                 mono_raise_exception (ex);
1603         }
1604 }