mono/metadata/threads.c

   1 /*
   2  * threads.c: Thread support internal calls
   3  *
   4  * Author:
   5  *      Dick Porter (dick@ximian.com)
   6  *      Paolo Molaro (lupus@ximian.com)
   7  *      Patrik Torstensson (patrik.torstensson@labs2.com)
   8  *
   9  * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
  10  * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
  11  */
  12
  13 #include <config.h>
  14
  15 #include <glib.h>
  16 #include <signal.h>
  17 #include <string.h>
  18
  19 #include <mono/metadata/object.h>
  20 #include <mono/metadata/domain-internals.h>
  21 #include <mono/metadata/profiler-private.h>
  22 #include <mono/metadata/threads.h>
  23 #include <mono/metadata/threadpool.h>
  24 #include <mono/metadata/threads-types.h>
  25 #include <mono/metadata/exception.h>
  26 #include <mono/metadata/environment.h>
  27 #include <mono/metadata/monitor.h>
  28 #include <mono/metadata/gc-internal.h>
  29 #include <mono/metadata/marshal.h>
  30 #include <mono/io-layer/io-layer.h>
  31 #ifndef HOST_WIN32
  32 #include <mono/io-layer/threads.h>
  33 #endif
  34 #include <mono/metadata/object-internals.h>
  35 #include <mono/metadata/mono-debug-debugger.h>
  36 #include <mono/utils/mono-compiler.h>
  37 #include <mono/utils/mono-mmap.h>
  38 #include <mono/utils/mono-membar.h>
  39 #include <mono/utils/mono-time.h>
  40
  41 #include <mono/metadata/gc-internal.h>
  42
  43 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
  44 #define THREAD_DEBUG(a)
  45 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
  46 #define THREAD_WAIT_DEBUG(a)
  47 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
  48 #define LIBGC_DEBUG(a)
  49
  50 /* Provide this for systems with glib < 2.6 */
  51 #ifndef G_GSIZE_FORMAT
  52 #   if GLIB_SIZEOF_LONG == 8
  53 #       define G_GSIZE_FORMAT "lu"
  54 #   else
  55 #       define G_GSIZE_FORMAT "u"
  56 #   endif
  57 #endif
  58
  59 struct StartInfo
  60 {
  61         guint32 (*func)(void *);
  62         MonoThread *obj;
  63         MonoObject *delegate;
  64         void *start_arg;
  65 };
  66
  67 typedef union {
  68         gint32 ival;
  69         gfloat fval;
  70 } IntFloatUnion;
  71
  72 typedef union {
  73         gint64 ival;
  74         gdouble fval;
  75 } LongDoubleUnion;
  76
  77 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
  78 struct _MonoThreadDomainTls {
  79         MonoThreadDomainTls *next;
  80         guint32 offset;
  81         guint32 size;
  82 };
  83
  84 typedef struct {
  85         int idx;
  86         int offset;
  87         MonoThreadDomainTls *freelist;
  88 } StaticDataInfo;
  89
  90 typedef struct {
  91         gpointer p;
  92         MonoHazardousFreeFunc free_func;
  93 } DelayedFreeItem;
  94
  95 /* Number of cached culture objects in the MonoThread->cached_culture_info array
  96  * (per-type): we use the first NUM entries for CultureInfo and the last for
  97  * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
  98  */
  99 #define NUM_CACHED_CULTURES 4
 100 #define CULTURES_START_IDX 0
 101 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
 102
 103 /* Controls access to the 'threads' hash table */
 104 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
 105 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
 106 static CRITICAL_SECTION threads_mutex;
 107
 108 /* Controls access to context static data */
 109 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
 110 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
 111 static CRITICAL_SECTION contexts_mutex;
 112
 113 /* Holds current status of static data heap */
 114 static StaticDataInfo thread_static_info;
 115 static StaticDataInfo context_static_info;
 116
 117 /* The hash of existing threads (key is thread ID, value is
 118  * MonoInternalThread*) that need joining before exit
 119  */
 120 static MonoGHashTable *threads=NULL;
 121
 122 /*
 123  * Threads which are starting up and they are not in the 'threads' hash yet.
 124  * When handle_store is called for a thread, it will be removed from this hash table.
 125  * Protected by mono_threads_lock ().
 126  */
 127 static MonoGHashTable *threads_starting_up = NULL;
 128
 129 /* Maps a MonoThread to its start argument */
 130 /* Protected by mono_threads_lock () */
 131 static MonoGHashTable *thread_start_args = NULL;
 132
 133 /* The TLS key that holds the MonoObject assigned to each thread */
 134 static guint32 current_object_key = -1;
 135
 136 #ifdef HAVE_KW_THREAD
 137 /* we need to use both the Tls* functions and __thread because
 138  * the gc needs to see all the threads
 139  */
 140 static __thread MonoInternalThread * tls_current_object MONO_TLS_FAST;
 141 #define SET_CURRENT_OBJECT(x) do { \
 142         tls_current_object = x; \
 143         TlsSetValue (current_object_key, x); \
 144 } while (FALSE)
 145 #define GET_CURRENT_OBJECT() tls_current_object
 146 #else
 147 #define SET_CURRENT_OBJECT(x) TlsSetValue (current_object_key, x)
 148 #define GET_CURRENT_OBJECT() (MonoThread*) TlsGetValue (current_object_key)
 149 #endif
 150
 151 /* function called at thread start */
 152 static MonoThreadStartCB mono_thread_start_cb = NULL;
 153
 154 /* function called at thread attach */
 155 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
 156
 157 /* function called at thread cleanup */
 158 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
 159
 160 /* function called to notify the runtime about a pending exception on the current thread */
 161 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
 162
 163 /* The default stack size for each thread */
 164 static guint32 default_stacksize = 0;
 165 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
 166
 167 static void thread_adjust_static_data (MonoInternalThread *thread);
 168 static void mono_init_static_data_info (StaticDataInfo *static_data);
 169 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
 170 static gboolean mono_thread_resume (MonoInternalThread* thread);
 171 static void mono_thread_start (MonoThread *thread);
 172 static void signal_thread_state_change (MonoInternalThread *thread);
 173
 174 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
 175
 176 /* Spin lock for InterlockedXXX 64 bit functions */
 177 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
 178 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
 179 static CRITICAL_SECTION interlocked_mutex;
 180
 181 /* global count of thread interruptions requested */
 182 static gint32 thread_interruption_requested = 0;
 183
 184 /* Event signaled when a thread changes its background mode */
 185 static HANDLE background_change_event;
 186
 187 /* The table for small ID assignment */
 188 static CRITICAL_SECTION small_id_mutex;
 189 static int small_id_table_size = 0;
 190 static int small_id_next = 0;
 191 static int highest_small_id = -1;
 192 static MonoInternalThread **small_id_table = NULL;
 193
 194 /* The hazard table */
 195 #if MONO_SMALL_CONFIG
 196 #define HAZARD_TABLE_MAX_SIZE   256
 197 #else
 198 #define HAZARD_TABLE_MAX_SIZE   16384 /* There cannot be more threads than this number. */
 199 #endif
 200 static volatile int hazard_table_size = 0;
 201 static MonoThreadHazardPointers * volatile hazard_table = NULL;
 202
 203 /* The table where we keep pointers to blocks to be freed but that
 204    have to wait because they're guarded by a hazard pointer. */
 205 static CRITICAL_SECTION delayed_free_table_mutex;
 206 static GArray *delayed_free_table = NULL;
 207
 208 static gboolean shutting_down = FALSE;
 209
 210 guint32
 211 mono_thread_get_tls_key (void)
 212 {
 213         return current_object_key;
 214 }
 215
 216 gint32
 217 mono_thread_get_tls_offset (void)
 218 {
 219         int offset;
 220         MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
 221         return offset;
 222 }
 223
 224 /* handle_store() and handle_remove() manage the array of threads that
 225  * still need to be waited for when the main thread exits.
 226  *
 227  * If handle_store() returns FALSE the thread must not be started
 228  * because Mono is shutting down.
 229  */
 230 static gboolean handle_store(MonoThread *thread)
 231 {
 232         mono_threads_lock ();
 233
 234         THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->tid));
 235
 236         if (threads_starting_up)
 237                 mono_g_hash_table_remove (threads_starting_up, thread);
 238
 239         if (shutting_down) {
 240                 mono_threads_unlock ();
 241                 return FALSE;
 242         }
 243
 244         if(threads==NULL) {
 245                 MONO_GC_REGISTER_ROOT (threads);
 246                 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
 247         }
 248
 249         /* We don't need to duplicate thread->handle, because it is
 250          * only closed when the thread object is finalized by the GC.
 251          */
 252         g_assert (thread->internal_thread);
 253         mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
 254                                  thread->internal_thread);
 255
 256         mono_threads_unlock ();
 257
 258         return TRUE;
 259 }
 260
 261 static gboolean handle_remove(MonoInternalThread *thread)
 262 {
 263         gboolean ret;
 264         gsize tid = thread->tid;
 265
 266         THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
 267
 268         mono_threads_lock ();
 269
 270         if (threads) {
 271                 /* We have to check whether the thread object for the
 272                  * tid is still the same in the table because the
 273                  * thread might have been destroyed and the tid reused
 274                  * in the meantime, in which case the tid would be in
 275                  * the table, but with another thread object.
 276                  */
 277                 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
 278                         mono_g_hash_table_remove (threads, (gpointer)tid);
 279                         ret = TRUE;
 280                 } else {
 281                         ret = FALSE;
 282                 }
 283         }
 284         else
 285                 ret = FALSE;
 286
 287         mono_threads_unlock ();
 288
 289         /* Don't close the handle here, wait for the object finalizer
 290          * to do it. Otherwise, the following race condition applies:
 291          *
 292          * 1) Thread exits (and handle_remove() closes the handle)
 293          *
 294          * 2) Some other handle is reassigned the same slot
 295          *
 296          * 3) Another thread tries to join the first thread, and
 297          * blocks waiting for the reassigned handle to be signalled
 298          * (which might never happen).  This is possible, because the
 299          * thread calling Join() still has a reference to the first
 300          * thread's object.
 301          */
 302         return ret;
 303 }
 304
 305 /*
 306  * Allocate a small thread id.
 307  *
 308  * FIXME: The biggest part of this function is very similar to
 309  * domain_id_alloc() in domain.c and should be merged.
 310  */
 311 static int
 312 small_id_alloc (MonoInternalThread *thread)
 313 {
 314         int id = -1, i;
 315
 316         EnterCriticalSection (&small_id_mutex);
 317
 318         if (!small_id_table) {
 319                 small_id_table_size = 2;
 320                 small_id_table = mono_gc_alloc_fixed (small_id_table_size * sizeof (MonoInternalThread*), NULL);
 321         }
 322         for (i = small_id_next; i < small_id_table_size; ++i) {
 323                 if (!small_id_table [i]) {
 324                         id = i;
 325                         break;
 326                 }
 327         }
 328         if (id == -1) {
 329                 for (i = 0; i < small_id_next; ++i) {
 330                         if (!small_id_table [i]) {
 331                                 id = i;
 332                                 break;
 333                         }
 334                 }
 335         }
 336         if (id == -1) {
 337                 MonoInternalThread **new_table;
 338                 int new_size = small_id_table_size * 2;
 339                 if (new_size >= (1 << 16))
 340                         g_assert_not_reached ();
 341                 id = small_id_table_size;
 342                 new_table = mono_gc_alloc_fixed (new_size * sizeof (MonoInternalThread*), NULL);
 343                 memcpy (new_table, small_id_table, small_id_table_size * sizeof (void*));
 344                 mono_gc_free_fixed (small_id_table);
 345                 small_id_table = new_table;
 346                 small_id_table_size = new_size;
 347         }
 348         thread->small_id = id;
 349         g_assert (small_id_table [id] == NULL);
 350         small_id_table [id] = thread;
 351         small_id_next++;
 352         if (small_id_next > small_id_table_size)
 353                 small_id_next = 0;
 354
 355         g_assert (id < HAZARD_TABLE_MAX_SIZE);
 356         if (id >= hazard_table_size) {
 357 #if MONO_SMALL_CONFIG
 358                 hazard_table = g_malloc0 (sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE);
 359                 hazard_table_size = HAZARD_TABLE_MAX_SIZE;
 360 #else
 361                 gpointer page_addr;
 362                 int pagesize = mono_pagesize ();
 363                 int num_pages = (hazard_table_size * sizeof (MonoThreadHazardPointers) + pagesize - 1) / pagesize;
 364
 365                 if (hazard_table == NULL) {
 366                         hazard_table = mono_valloc (NULL,
 367                                 sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE,
 368                                 MONO_MMAP_NONE);
 369                 }
 370
 371                 g_assert (hazard_table != NULL);
 372                 page_addr = (guint8*)hazard_table + num_pages * pagesize;
 373
 374                 mono_mprotect (page_addr, pagesize, MONO_MMAP_READ | MONO_MMAP_WRITE);
 375
 376                 ++num_pages;
 377                 hazard_table_size = num_pages * pagesize / sizeof (MonoThreadHazardPointers);
 378
 379 #endif
 380                 g_assert (id < hazard_table_size);
 381                 hazard_table [id].hazard_pointers [0] = NULL;
 382                 hazard_table [id].hazard_pointers [1] = NULL;
 383         }
 384
 385         if (id > highest_small_id) {
 386                 highest_small_id = id;
 387                 mono_memory_write_barrier ();
 388         }
 389
 390         LeaveCriticalSection (&small_id_mutex);
 391
 392         return id;
 393 }
 394
 395 static void
 396 small_id_free (int id)
 397 {
 398         g_assert (id >= 0 && id < small_id_table_size);
 399         g_assert (small_id_table [id] != NULL);
 400
 401         small_id_table [id] = NULL;
 402 }
 403
 404 static gboolean
 405 is_pointer_hazardous (gpointer p)
 406 {
 407         int i;
 408         int highest = highest_small_id;
 409
 410         g_assert (highest < hazard_table_size);
 411
 412         for (i = 0; i <= highest; ++i) {
 413                 if (hazard_table [i].hazard_pointers [0] == p
 414                                 || hazard_table [i].hazard_pointers [1] == p)
 415                         return TRUE;
 416         }
 417
 418         return FALSE;
 419 }
 420
 421 MonoThreadHazardPointers*
 422 mono_hazard_pointer_get (void)
 423 {
 424         MonoInternalThread *current_thread = mono_thread_internal_current ();
 425
 426         if (!(current_thread && current_thread->small_id >= 0)) {
 427                 static MonoThreadHazardPointers emerg_hazard_table;
 428                 g_warning ("Thread %p may have been prematurely finalized", current_thread);
 429                 return &emerg_hazard_table;
 430         }
 431
 432         return &hazard_table [current_thread->small_id];
 433 }
 434
 435 static void
 436 try_free_delayed_free_item (int index)
 437 {
 438         if (delayed_free_table->len > index) {
 439                 DelayedFreeItem item = { NULL, NULL };
 440
 441                 EnterCriticalSection (&delayed_free_table_mutex);
 442                 /* We have to check the length again because another
 443                    thread might have freed an item before we acquired
 444                    the lock. */
 445                 if (delayed_free_table->len > index) {
 446                         item = g_array_index (delayed_free_table, DelayedFreeItem, index);
 447
 448                         if (!is_pointer_hazardous (item.p))
 449                                 g_array_remove_index_fast (delayed_free_table, index);
 450                         else
 451                                 item.p = NULL;
 452                 }
 453                 LeaveCriticalSection (&delayed_free_table_mutex);
 454
 455                 if (item.p != NULL)
 456                         item.free_func (item.p);
 457         }
 458 }
 459
 460 void
 461 mono_thread_hazardous_free_or_queue (gpointer p, MonoHazardousFreeFunc free_func)
 462 {
 463         int i;
 464
 465         /* First try to free a few entries in the delayed free
 466            table. */
 467         for (i = 2; i >= 0; --i)
 468                 try_free_delayed_free_item (i);
 469
 470         /* Now see if the pointer we're freeing is hazardous.  If it
 471            isn't, free it.  Otherwise put it in the delay list. */
 472         if (is_pointer_hazardous (p)) {
 473                 DelayedFreeItem item = { p, free_func };
 474
 475                 ++mono_stats.hazardous_pointer_count;
 476
 477                 EnterCriticalSection (&delayed_free_table_mutex);
 478                 g_array_append_val (delayed_free_table, item);
 479                 LeaveCriticalSection (&delayed_free_table_mutex);
 480         } else
 481                 free_func (p);
 482 }
 483
 484 void
 485 mono_thread_hazardous_try_free_all (void)
 486 {
 487         int len;
 488         int i;
 489
 490         if (!delayed_free_table)
 491                 return;
 492
 493         len = delayed_free_table->len;
 494
 495         for (i = len - 1; i >= 0; --i)
 496                 try_free_delayed_free_item (i);
 497 }
 498
 499 static void ensure_synch_cs_set (MonoInternalThread *thread)
 500 {
 501         CRITICAL_SECTION *synch_cs;
 502
 503         if (thread->synch_cs != NULL) {
 504                 return;
 505         }
 506
 507         synch_cs = g_new0 (CRITICAL_SECTION, 1);
 508         InitializeCriticalSection (synch_cs);
 509
 510         if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
 511                                                synch_cs, NULL) != NULL) {
 512                 /* Another thread must have installed this CS */
 513                 DeleteCriticalSection (synch_cs);
 514                 g_free (synch_cs);
 515         }
 516 }
 517
 518 /*
 519  * NOTE: this function can be called also for threads different from the current one:
 520  * make sure no code called from it will ever assume it is run on the thread that is
 521  * getting cleaned up.
 522  */
 523 static void thread_cleanup (MonoInternalThread *thread)
 524 {
 525         g_assert (thread != NULL);
 526
 527         if (thread->abort_state_handle) {
 528                 mono_gchandle_free (thread->abort_state_handle);
 529                 thread->abort_state_handle = 0;
 530         }
 531         thread->abort_exc = NULL;
 532         thread->current_appcontext = NULL;
 533
 534         /*
 535          * This is necessary because otherwise we might have
 536          * cross-domain references which will not get cleaned up when
 537          * the target domain is unloaded.
 538          */
 539         if (thread->cached_culture_info) {
 540                 int i;
 541                 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
 542                         mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
 543         }
 544
 545         /* if the thread is not in the hash it has been removed already */
 546         if (!handle_remove (thread))
 547                 return;
 548         mono_release_type_locks (thread);
 549
 550         EnterCriticalSection (thread->synch_cs);
 551
 552         thread->state |= ThreadState_Stopped;
 553         thread->state &= ~ThreadState_Background;
 554
 555         LeaveCriticalSection (thread->synch_cs);
 556
 557         mono_profiler_thread_end (thread->tid);
 558
 559         if (thread == mono_thread_internal_current ())
 560                 mono_thread_pop_appdomain_ref ();
 561
 562         thread->cached_culture_info = NULL;
 563
 564         mono_gc_free_fixed (thread->static_data);
 565         thread->static_data = NULL;
 566
 567         /*
 568          * FIXME: The check for shutting_down here is a kludge and
 569          * should be removed.  The reason we need it here is because
 570          * mono_thread_manage() does not wait for finalizer threads,
 571          * so we might still be at this point in a finalizer thread
 572          * after the main thread has cleared the root domain, so
 573          * thread could have been zeroed out.
 574          */
 575         if (mono_thread_cleanup_fn && !shutting_down)
 576                 mono_thread_cleanup_fn (thread->root_domain_thread);
 577
 578         small_id_free (thread->small_id);
 579         thread->small_id = -2;
 580 }
 581
 582 static gpointer
 583 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
 584 {
 585         int idx;
 586         g_assert ((offset & 0x80000000) == 0);
 587         offset &= 0x7fffffff;
 588         idx = (offset >> 24) - 1;
 589         return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
 590 }
 591
 592 static MonoThread**
 593 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
 594 {
 595         static MonoClassField *current_thread_field = NULL;
 596
 597         guint32 offset;
 598
 599         if (!current_thread_field) {
 600                 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
 601                 g_assert (current_thread_field);
 602         }
 603
 604         mono_class_vtable (domain, mono_defaults.thread_class);
 605         mono_domain_lock (domain);
 606         offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
 607         mono_domain_unlock (domain);
 608         g_assert (offset);
 609
 610         return get_thread_static_data (thread, offset);
 611 }
 612
 613 static void
 614 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
 615 {
 616         MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
 617
 618         g_assert (current->obj.vtable->domain == domain);
 619
 620         g_assert (!*current_thread_ptr);
 621         *current_thread_ptr = current;
 622 }
 623
 624 static MonoThread*
 625 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
 626 {
 627         MonoThread *thread = (MonoThread*) mono_object_new (domain, mono_defaults.thread_class);
 628         MONO_OBJECT_SETREF (thread, internal_thread, internal);
 629         return thread;
 630 }
 631
 632 static void
 633 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
 634 {
 635         MonoDomain *domain = mono_get_root_domain ();
 636
 637         if (!candidate || candidate->obj.vtable->domain != domain)
 638                 candidate = new_thread_with_internal (domain, thread);
 639         set_current_thread_for_domain (domain, thread, candidate);
 640         g_assert (!thread->root_domain_thread);
 641         MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
 642 }
 643
 644 static guint32 WINAPI start_wrapper(void *data)
 645 {
 646         struct StartInfo *start_info=(struct StartInfo *)data;
 647         guint32 (*start_func)(void *);
 648         void *start_arg;
 649         gsize tid;
 650         MonoThread *thread=start_info->obj;
 651         MonoInternalThread *internal = thread->internal_thread;
 652         MonoObject *start_delegate = start_info->delegate;
 653
 654         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
 655
 656         /* We can be sure start_info->obj->tid and
 657          * start_info->obj->handle have been set, because the thread
 658          * was created suspended, and these values were set before the
 659          * thread resumed
 660          */
 661
 662         tid=internal->tid;
 663
 664         SET_CURRENT_OBJECT (internal);
 665
 666         mono_monitor_init_tls ();
 667
 668         /* Every thread references the appdomain which created it */
 669         mono_thread_push_appdomain_ref (thread->obj.vtable->domain);
 670
 671         if (!mono_domain_set (thread->obj.vtable->domain, FALSE)) {
 672                 /* No point in raising an appdomain_unloaded exception here */
 673                 /* FIXME: Cleanup here */
 674                 mono_thread_pop_appdomain_ref ();
 675                 return 0;
 676         }
 677
 678         start_func = start_info->func;
 679         start_arg = start_info->start_arg;
 680
 681         /* We have to do this here because mono_thread_new_init()
 682            requires that root_domain_thread is set up. */
 683         thread_adjust_static_data (internal);
 684         init_root_domain_thread (internal, thread);
 685
 686         /* This MUST be called before any managed code can be
 687          * executed, as it calls the callback function that (for the
 688          * jit) sets the lmf marker.
 689          */
 690         mono_thread_new_init (tid, &tid, start_func);
 691         internal->stack_ptr = &tid;
 692
 693         LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
 694
 695         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
 696
 697         /* On 2.0 profile (and higher), set explicitly since state might have been
 698            Unknown */
 699         if (internal->apartment_state == ThreadApartmentState_Unknown)
 700                 internal->apartment_state = ThreadApartmentState_MTA;
 701
 702         mono_thread_init_apartment_state ();
 703
 704         if(internal->start_notify!=NULL) {
 705                 /* Let the thread that called Start() know we're
 706                  * ready
 707                  */
 708                 ReleaseSemaphore (internal->start_notify, 1, NULL);
 709         }
 710
 711         mono_threads_lock ();
 712         mono_g_hash_table_remove (thread_start_args, thread);
 713         mono_threads_unlock ();
 714
 715         g_free (start_info);
 716 #ifdef DEBUG
 717         g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
 718                    thread->tid);
 719 #endif
 720
 721         mono_thread_set_execution_context (thread->ec_to_set);
 722         thread->ec_to_set = NULL;
 723
 724         /*
 725          * Call this after calling start_notify, since the profiler callback might want
 726          * to lock the thread, and the lock is held by thread_start () which waits for
 727          * start_notify.
 728          */
 729         mono_profiler_thread_start (tid);
 730
 731         /* start_func is set only for unmanaged start functions */
 732         if (start_func) {
 733                 start_func (start_arg);
 734         } else {
 735                 void *args [1];
 736                 g_assert (start_delegate != NULL);
 737                 args [0] = start_arg;
 738                 /* we may want to handle the exception here. See comment below on unhandled exceptions */
 739                 mono_runtime_delegate_invoke (start_delegate, args, NULL);
 740         }
 741
 742         /* If the thread calls ExitThread at all, this remaining code
 743          * will not be executed, but the main thread will eventually
 744          * call thread_cleanup() on this thread's behalf.
 745          */
 746
 747         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
 748
 749         thread_cleanup (internal);
 750
 751         /* Do any cleanup needed for apartment state. This
 752          * cannot be done in thread_cleanup since thread_cleanup could be
 753          * called for a thread other than the current thread.
 754          * mono_thread_cleanup_apartment_state cleans up apartment
 755          * for the current thead */
 756         mono_thread_cleanup_apartment_state ();
 757
 758         /* Remove the reference to the thread object in the TLS data,
 759          * so the thread object can be finalized.  This won't be
 760          * reached if the thread threw an uncaught exception, so those
 761          * thread handles will stay referenced :-( (This is due to
 762          * missing support for scanning thread-specific data in the
 763          * Boehm GC - the io-layer keeps a GC-visible hash of pointers
 764          * to TLS data.)
 765          */
 766         SET_CURRENT_OBJECT (NULL);
 767         mono_domain_unset ();
 768
 769         return(0);
 770 }
 771
 772 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
 773 {
 774         if (mono_thread_start_cb) {
 775                 mono_thread_start_cb (tid, stack_start, func);
 776         }
 777 }
 778
 779 void mono_threads_set_default_stacksize (guint32 stacksize)
 780 {
 781         default_stacksize = stacksize;
 782 }
 783
 784 guint32 mono_threads_get_default_stacksize (void)
 785 {
 786         return default_stacksize;
 787 }
 788
 789 /*
 790  * mono_create_thread:
 791  *
 792  *   This is a wrapper around CreateThread which handles differences in the type of
 793  * the the 'tid' argument.
 794  */
 795 gpointer mono_create_thread (WapiSecurityAttributes *security,
 796                                                          guint32 stacksize, WapiThreadStart start,
 797                                                          gpointer param, guint32 create, gsize *tid)
 798 {
 799         gpointer res;
 800
 801 #ifdef HOST_WIN32
 802         DWORD real_tid;
 803
 804         res = CreateThread (security, stacksize, start, param, create, &real_tid);
 805         if (tid)
 806                 *tid = real_tid;
 807 #else
 808         res = CreateThread (security, stacksize, start, param, create, tid);
 809 #endif
 810
 811         return res;
 812 }
 813
 814 /*
 815  * The thread start argument may be an object reference, and there is
 816  * no ref to keep it alive when the new thread is started but not yet
 817  * registered with the collector. So we store it in a GC tracked hash
 818  * table.
 819  *
 820  * LOCKING: Assumes the threads lock is held.
 821  */
 822 static void
 823 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
 824 {
 825         if (thread_start_args == NULL) {
 826                 MONO_GC_REGISTER_ROOT (thread_start_args);
 827                 thread_start_args = mono_g_hash_table_new (NULL, NULL);
 828         }
 829         mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
 830 }
 831
 832 MonoInternalThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread)
 833 {
 834         MonoThread *thread;
 835         MonoInternalThread *internal;
 836         HANDLE thread_handle;
 837         struct StartInfo *start_info;
 838         gsize tid;
 839
 840         thread=(MonoThread *)mono_object_new (domain,
 841                                               mono_defaults.thread_class);
 842         internal = (MonoInternalThread*)mono_object_new (mono_get_root_domain (),
 843                         mono_defaults.internal_thread_class);
 844         MONO_OBJECT_SETREF (thread, internal_thread, internal);
 845
 846         start_info=g_new0 (struct StartInfo, 1);
 847         start_info->func = func;
 848         start_info->obj = thread;
 849         start_info->start_arg = arg;
 850
 851         mono_threads_lock ();
 852         if (shutting_down) {
 853                 mono_threads_unlock ();
 854                 g_free (start_info);
 855                 return NULL;
 856         }
 857         if (threads_starting_up == NULL) {
 858                 MONO_GC_REGISTER_ROOT (threads_starting_up);
 859                 threads_starting_up = mono_g_hash_table_new (NULL, NULL);
 860         }
 861
 862         register_thread_start_argument (thread, start_info);
 863         mono_g_hash_table_insert (threads_starting_up, thread, thread);
 864         mono_threads_unlock ();
 865
 866         /* Create suspended, so we can do some housekeeping before the thread
 867          * starts
 868          */
 869         thread_handle = mono_create_thread (NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
 870                                      CREATE_SUSPENDED, &tid);
 871         THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
 872         if (thread_handle == NULL) {
 873                 /* The thread couldn't be created, so throw an exception */
 874                 mono_threads_lock ();
 875                 mono_g_hash_table_remove (threads_starting_up, thread);
 876                 mono_threads_unlock ();
 877                 g_free (start_info);
 878                 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
 879                 return NULL;
 880         }
 881
 882         internal->handle=thread_handle;
 883         internal->tid=tid;
 884         internal->apartment_state=ThreadApartmentState_Unknown;
 885         small_id_alloc (internal);
 886
 887         internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
 888         InitializeCriticalSection (internal->synch_cs);
 889
 890         internal->threadpool_thread = threadpool_thread;
 891         if (threadpool_thread)
 892                 mono_thread_set_state (internal, ThreadState_Background);
 893
 894         if (handle_store (thread))
 895                 ResumeThread (thread_handle);
 896
 897         return internal;
 898 }
 899
 900 void
 901 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
 902 {
 903         mono_thread_create_internal (domain, func, arg, FALSE);
 904 }
 905
 906 /*
 907  * mono_thread_get_stack_bounds:
 908  *
 909  *   Return the address and size of the current threads stack. Return NULL as the
 910  * stack address if the stack address cannot be determined.
 911  */
 912 void
 913 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
 914 {
 915 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
 916         *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
 917         *stsize = pthread_get_stacksize_np (pthread_self ());
 918         *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
 919         return;
 920         /* FIXME: simplify the mess below */
 921 #elif !defined(HOST_WIN32)
 922         pthread_attr_t attr;
 923         guint8 *current = (guint8*)&attr;
 924
 925         pthread_attr_init (&attr);
 926 #  ifdef HAVE_PTHREAD_GETATTR_NP
 927         pthread_getattr_np (pthread_self(), &attr);
 928 #  else
 929 #    ifdef HAVE_PTHREAD_ATTR_GET_NP
 930         pthread_attr_get_np (pthread_self(), &attr);
 931 #    elif defined(sun)
 932         *staddr = NULL;
 933         pthread_attr_getstacksize (&attr, &stsize);
 934 #    else
 935         *staddr = NULL;
 936         *stsize = 0;
 937         return;
 938 #    endif
 939 #  endif
 940
 941 #  ifndef sun
 942         pthread_attr_getstack (&attr, (void**)staddr, stsize);
 943         if (*staddr)
 944                 g_assert ((current > *staddr) && (current < *staddr + *stsize));
 945 #  endif
 946
 947         pthread_attr_destroy (&attr);
 948 #endif
 949
 950         /* When running under emacs, sometimes staddr is not aligned to a page size */
 951         *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
 952 }
 953
 954 MonoThread *
 955 mono_thread_attach (MonoDomain *domain)
 956 {
 957         MonoInternalThread *thread;
 958         MonoThread *current_thread;
 959         HANDLE thread_handle;
 960         gsize tid;
 961
 962         if ((thread = mono_thread_internal_current ())) {
 963                 if (domain != mono_domain_get ())
 964                         mono_domain_set (domain, TRUE);
 965                 /* Already attached */
 966                 return mono_thread_current ();
 967         }
 968
 969         if (!mono_gc_register_thread (&domain)) {
 970                 g_error ("Thread %"G_GSIZE_FORMAT" calling into managed code is not registered with the GC. On UNIX, this can be fixed by #include-ing <gc.h> before <pthread.h> in the file containing the thread creation code.", GetCurrentThreadId ());
 971         }
 972
 973         thread = (MonoInternalThread *)mono_object_new (domain, mono_defaults.internal_thread_class);
 974
 975         thread_handle = GetCurrentThread ();
 976         g_assert (thread_handle);
 977
 978         tid=GetCurrentThreadId ();
 979
 980         /*
 981          * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
 982          * refer to the thread from other threads for things like aborting.
 983          */
 984         DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
 985                                          THREAD_ALL_ACCESS, TRUE, 0);
 986
 987         thread->handle=thread_handle;
 988         thread->tid=tid;
 989         thread->apartment_state=ThreadApartmentState_Unknown;
 990         small_id_alloc (thread);
 991         thread->stack_ptr = &tid;
 992
 993         thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
 994         InitializeCriticalSection (thread->synch_cs);
 995
 996         THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
 997
 998         current_thread = new_thread_with_internal (domain, thread);
 999
1000         if (!handle_store (current_thread)) {
1001                 /* Mono is shutting down, so just wait for the end */
1002                 for (;;)
1003                         Sleep (10000);
1004         }
1005
1006         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
1007
1008         SET_CURRENT_OBJECT (thread);
1009         mono_domain_set (domain, TRUE);
1010
1011         mono_monitor_init_tls ();
1012
1013         thread_adjust_static_data (thread);
1014
1015         init_root_domain_thread (thread, current_thread);
1016         if (domain != mono_get_root_domain ())
1017                 set_current_thread_for_domain (domain, thread, current_thread);
1018
1019
1020         if (mono_thread_attach_cb) {
1021                 guint8 *staddr;
1022                 size_t stsize;
1023
1024                 mono_thread_get_stack_bounds (&staddr, &stsize);
1025
1026                 if (staddr == NULL)
1027                         mono_thread_attach_cb (tid, &tid);
1028                 else
1029                         mono_thread_attach_cb (tid, staddr + stsize);
1030         }
1031
1032         // FIXME: Need a separate callback
1033         mono_profiler_thread_start (tid);
1034
1035         return current_thread;
1036 }
1037
1038 void
1039 mono_thread_detach (MonoThread *thread)
1040 {
1041         g_return_if_fail (thread != NULL);
1042
1043         THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1044
1045         thread_cleanup (thread->internal_thread);
1046
1047         SET_CURRENT_OBJECT (NULL);
1048         mono_domain_unset ();
1049
1050         /* Don't need to CloseHandle this thread, even though we took a
1051          * reference in mono_thread_attach (), because the GC will do it
1052          * when the Thread object is finalised.
1053          */
1054 }
1055
1056 void
1057 mono_thread_exit ()
1058 {
1059         MonoInternalThread *thread = mono_thread_internal_current ();
1060
1061         THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1062
1063         thread_cleanup (thread);
1064         SET_CURRENT_OBJECT (NULL);
1065         mono_domain_unset ();
1066
1067         /* we could add a callback here for embedders to use. */
1068         if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1069                 exit (mono_environment_exitcode_get ());
1070         ExitThread (-1);
1071 }
1072
1073 void
1074 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1075 {
1076         MonoInternalThread *internal = (MonoInternalThread*)mono_object_new (mono_get_root_domain (), mono_defaults.internal_thread_class);
1077         internal->state = ThreadState_Unstarted;
1078         internal->apartment_state = ThreadApartmentState_Unknown;
1079
1080         InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1081 }
1082
1083 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
1084                                                          MonoObject *start)
1085 {
1086         guint32 (*start_func)(void *);
1087         struct StartInfo *start_info;
1088         HANDLE thread;
1089         gsize tid;
1090         MonoInternalThread *internal;
1091
1092         THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1093
1094         if (!this->internal_thread)
1095                 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1096         internal = this->internal_thread;
1097
1098         ensure_synch_cs_set (internal);
1099
1100         EnterCriticalSection (internal->synch_cs);
1101
1102         if ((internal->state & ThreadState_Unstarted) == 0) {
1103                 LeaveCriticalSection (internal->synch_cs);
1104                 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1105                 return NULL;
1106         }
1107
1108         internal->small_id = -1;
1109
1110         if ((internal->state & ThreadState_Aborted) != 0) {
1111                 LeaveCriticalSection (internal->synch_cs);
1112                 return this;
1113         }
1114         start_func = NULL;
1115         {
1116                 /* This is freed in start_wrapper */
1117                 start_info = g_new0 (struct StartInfo, 1);
1118                 start_info->func = start_func;
1119                 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1120                 start_info->delegate = start;
1121                 start_info->obj = this;
1122                 g_assert (this->obj.vtable->domain == mono_domain_get ());
1123
1124                 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1125                 if (internal->start_notify==NULL) {
1126                         LeaveCriticalSection (internal->synch_cs);
1127                         g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1128                         g_free (start_info);
1129                         return(NULL);
1130                 }
1131
1132                 mono_threads_lock ();
1133                 register_thread_start_argument (this, start_info);
1134                 if (threads_starting_up == NULL) {
1135                         MONO_GC_REGISTER_ROOT (threads_starting_up);
1136                         threads_starting_up = mono_g_hash_table_new (NULL, NULL);
1137                 }
1138                 mono_g_hash_table_insert (threads_starting_up, this, this);
1139                 mono_threads_unlock ();
1140
1141                 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1142                                     CREATE_SUSPENDED, &tid);
1143                 if(thread==NULL) {
1144                         LeaveCriticalSection (internal->synch_cs);
1145                         mono_threads_lock ();
1146                         mono_g_hash_table_remove (threads_starting_up, this);
1147                         mono_threads_unlock ();
1148                         g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1149                         return(NULL);
1150                 }
1151
1152                 internal->handle=thread;
1153                 internal->tid=tid;
1154                 small_id_alloc (internal);
1155
1156                 /* Don't call handle_store() here, delay it to Start.
1157                  * We can't join a thread (trying to will just block
1158                  * forever) until it actually starts running, so don't
1159                  * store the handle till then.
1160                  */
1161
1162                 mono_thread_start (this);
1163
1164                 internal->state &= ~ThreadState_Unstarted;
1165
1166                 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1167
1168                 LeaveCriticalSection (internal->synch_cs);
1169                 return(thread);
1170         }
1171 }
1172
1173 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1174 {
1175         MONO_ARCH_SAVE_REGS;
1176
1177         THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1178
1179         if (thread)
1180                 CloseHandle (thread);
1181
1182         if (this->synch_cs) {
1183                 DeleteCriticalSection (this->synch_cs);
1184                 g_free (this->synch_cs);
1185                 this->synch_cs = NULL;
1186         }
1187
1188         g_free (this->name);
1189 }
1190
1191 static void mono_thread_start (MonoThread *thread)
1192 {
1193         MonoInternalThread *internal = thread->internal_thread;
1194
1195         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1196
1197         /* Only store the handle when the thread is about to be
1198          * launched, to avoid the main thread deadlocking while trying
1199          * to clean up a thread that will never be signalled.
1200          */
1201         if (!handle_store (thread))
1202                 return;
1203
1204         ResumeThread (internal->handle);
1205
1206         if(internal->start_notify!=NULL) {
1207                 /* Wait for the thread to set up its TLS data etc, so
1208                  * theres no potential race condition if someone tries
1209                  * to look up the data believing the thread has
1210                  * started
1211                  */
1212
1213                 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1214
1215                 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1216                 CloseHandle (internal->start_notify);
1217                 internal->start_notify = NULL;
1218         }
1219
1220         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1221 }
1222
1223 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1224 {
1225         guint32 res;
1226         MonoInternalThread *thread = mono_thread_internal_current ();
1227
1228         THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1229
1230         mono_thread_current_check_pending_interrupt ();
1231
1232         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1233
1234         res = SleepEx(ms,TRUE);
1235
1236         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1237
1238         if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1239                 MonoException* exc = mono_thread_execute_interruption (thread);
1240                 if (exc) mono_raise_exception (exc);
1241         }
1242 }
1243
1244 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1245 {
1246 }
1247
1248 gint32
1249 ves_icall_System_Threading_Thread_GetDomainID (void)
1250 {
1251         MONO_ARCH_SAVE_REGS;
1252
1253         return mono_domain_get()->domain_id;
1254 }
1255
1256 /*
1257  * mono_thread_get_name:
1258  *
1259  *   Return the name of the thread. NAME_LEN is set to the length of the name.
1260  * Return NULL if the thread has no name. The returned memory is owned by the
1261  * caller.
1262  */
1263 gunichar2*
1264 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1265 {
1266         gunichar2 *res;
1267
1268         ensure_synch_cs_set (this_obj);
1269
1270         EnterCriticalSection (this_obj->synch_cs);
1271
1272         if (!this_obj->name) {
1273                 *name_len = 0;
1274                 res = NULL;
1275         } else {
1276                 *name_len = this_obj->name_len;
1277                 res = g_new (gunichar2, this_obj->name_len);
1278                 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1279         }
1280
1281         LeaveCriticalSection (this_obj->synch_cs);
1282
1283         return res;
1284 }
1285
1286 MonoString*
1287 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1288 {
1289         MonoString* str;
1290
1291         ensure_synch_cs_set (this_obj);
1292
1293         EnterCriticalSection (this_obj->synch_cs);
1294
1295         if (!this_obj->name)
1296                 str = NULL;
1297         else
1298                 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1299
1300         LeaveCriticalSection (this_obj->synch_cs);
1301
1302         return str;
1303 }
1304
1305 void
1306 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1307 {
1308         ensure_synch_cs_set (this_obj);
1309
1310         EnterCriticalSection (this_obj->synch_cs);
1311
1312         if (this_obj->name) {
1313                 LeaveCriticalSection (this_obj->synch_cs);
1314
1315                 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1316                 return;
1317         }
1318         if (name) {
1319                 this_obj->name = g_new (gunichar2, mono_string_length (name));
1320                 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1321                 this_obj->name_len = mono_string_length (name);
1322         }
1323         else
1324                 this_obj->name = NULL;
1325
1326         LeaveCriticalSection (this_obj->synch_cs);
1327 }
1328
1329 static MonoObject*
1330 lookup_cached_culture (MonoInternalThread *this, MonoDomain *domain, int start_idx)
1331 {
1332         MonoObject *res;
1333         int i;
1334
1335         if (this->cached_culture_info) {
1336                 domain = mono_domain_get ();
1337                 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1338                         res = mono_array_get (this->cached_culture_info, MonoObject*, i);
1339                         if (res && res->vtable->domain == domain)
1340                                 return res;
1341                 }
1342         }
1343
1344         return NULL;
1345 }
1346
1347 /* If the array is already in the requested domain, we just return it,
1348    otherwise we return a copy in that domain. */
1349 static MonoArray*
1350 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1351 {
1352         MonoArray *copy;
1353
1354         if (!arr)
1355                 return NULL;
1356
1357         if (mono_object_domain (arr) == domain)
1358                 return arr;
1359
1360         copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1361         memcpy (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1362         return copy;
1363 }
1364
1365 MonoArray*
1366 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1367 {
1368         return byte_array_to_domain (arr, mono_get_root_domain ());
1369 }
1370
1371 MonoArray*
1372 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1373 {
1374         return byte_array_to_domain (arr, mono_domain_get ());
1375 }
1376
1377 MonoObject*
1378 ves_icall_System_Threading_Thread_GetCachedCurrentCulture (MonoInternalThread *this)
1379 {
1380         return lookup_cached_culture (this, mono_domain_get (), CULTURES_START_IDX);
1381 }
1382
1383 static void
1384 cache_culture (MonoInternalThread *this, MonoObject *culture, int start_idx)
1385 {
1386         int i;
1387         MonoDomain *domain = mono_domain_get ();
1388         MonoObject *obj;
1389         int free_slot = -1;
1390         int same_domain_slot = -1;
1391
1392         ensure_synch_cs_set (this);
1393
1394         EnterCriticalSection (this->synch_cs);
1395
1396         if (!this->cached_culture_info)
1397                 MONO_OBJECT_SETREF (this, cached_culture_info, mono_array_new_cached (mono_get_root_domain (), mono_defaults.object_class, NUM_CACHED_CULTURES * 2));
1398
1399         for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1400                 obj = mono_array_get (this->cached_culture_info, MonoObject*, i);
1401                 /* Free entry */
1402                 if (!obj) {
1403                         free_slot = i;
1404                         /* we continue, because there may be a slot used with the same domain */
1405                         continue;
1406                 }
1407                 /* Replace */
1408                 if (obj->vtable->domain == domain) {
1409                         same_domain_slot = i;
1410                         break;
1411                 }
1412         }
1413         if (same_domain_slot >= 0)
1414                 mono_array_setref (this->cached_culture_info, same_domain_slot, culture);
1415         else if (free_slot >= 0)
1416                 mono_array_setref (this->cached_culture_info, free_slot, culture);
1417         /* we may want to replace an existing entry here, even when no suitable slot is found */
1418
1419         LeaveCriticalSection (this->synch_cs);
1420 }
1421
1422 void
1423 ves_icall_System_Threading_Thread_SetCachedCurrentCulture (MonoThread *this, MonoObject *culture)
1424 {
1425         MonoDomain *domain = mono_object_get_domain (&this->obj);
1426         g_assert (domain == mono_domain_get ());
1427         cache_culture (this->internal_thread, culture, CULTURES_START_IDX);
1428 }
1429
1430 MonoObject*
1431 ves_icall_System_Threading_Thread_GetCachedCurrentUICulture (MonoInternalThread *this)
1432 {
1433         return lookup_cached_culture (this, mono_domain_get (), UICULTURES_START_IDX);
1434 }
1435
1436 void
1437 ves_icall_System_Threading_Thread_SetCachedCurrentUICulture (MonoThread *this, MonoObject *culture)
1438 {
1439         MonoDomain *domain = mono_object_get_domain (&this->obj);
1440         g_assert (domain == mono_domain_get ());
1441         cache_culture (this->internal_thread, culture, UICULTURES_START_IDX);
1442 }
1443
1444 MonoThread *
1445 mono_thread_current (void)
1446 {
1447         MonoDomain *domain = mono_domain_get ();
1448         MonoInternalThread *internal = mono_thread_internal_current ();
1449         MonoThread **current_thread_ptr;
1450
1451         g_assert (internal);
1452         current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1453
1454         if (!*current_thread_ptr) {
1455                 g_assert (domain != mono_get_root_domain ());
1456                 *current_thread_ptr = new_thread_with_internal (domain, internal);
1457         }
1458         return *current_thread_ptr;
1459 }
1460
1461 MonoInternalThread*
1462 mono_thread_internal_current (void)
1463 {
1464         MonoInternalThread *res = GET_CURRENT_OBJECT ();
1465         THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1466         return res;
1467 }
1468
1469 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1470                                                          int ms, HANDLE thread)
1471 {
1472         MonoInternalThread *cur_thread = mono_thread_internal_current ();
1473         gboolean ret;
1474
1475         mono_thread_current_check_pending_interrupt ();
1476
1477         ensure_synch_cs_set (this);
1478
1479         EnterCriticalSection (this->synch_cs);
1480
1481         if ((this->state & ThreadState_Unstarted) != 0) {
1482                 LeaveCriticalSection (this->synch_cs);
1483
1484                 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1485                 return FALSE;
1486         }
1487
1488         LeaveCriticalSection (this->synch_cs);
1489
1490         if(ms== -1) {
1491                 ms=INFINITE;
1492         }
1493         THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1494
1495         mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1496
1497         ret=WaitForSingleObjectEx (thread, ms, TRUE);
1498
1499         mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1500
1501         if(ret==WAIT_OBJECT_0) {
1502                 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1503
1504                 return(TRUE);
1505         }
1506
1507         THREAD_DEBUG (g_message ("%s: join failed", __func__));
1508
1509         return(FALSE);
1510 }
1511
1512 /* FIXME: exitContext isnt documented */
1513 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1514 {
1515         HANDLE *handles;
1516         guint32 numhandles;
1517         guint32 ret;
1518         guint32 i;
1519         MonoObject *waitHandle;
1520         MonoInternalThread *thread = mono_thread_internal_current ();
1521
1522         /* Do this WaitSleepJoin check before creating objects */
1523         mono_thread_current_check_pending_interrupt ();
1524
1525         numhandles = mono_array_length(mono_handles);
1526         handles = g_new0(HANDLE, numhandles);
1527
1528         for(i = 0; i < numhandles; i++) {
1529                 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1530                 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1531         }
1532
1533         if(ms== -1) {
1534                 ms=INFINITE;
1535         }
1536
1537         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1538
1539         ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1540
1541         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1542
1543         g_free(handles);
1544
1545         if(ret==WAIT_FAILED) {
1546                 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1547                 return(FALSE);
1548         } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1549                 /* Do we want to try again if we get
1550                  * WAIT_IO_COMPLETION? The documentation for
1551                  * WaitHandle doesn't give any clues.  (We'd have to
1552                  * fiddle with the timeout if we retry.)
1553                  */
1554                 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1555                 return(FALSE);
1556         }
1557
1558         return(TRUE);
1559 }
1560
1561 /* FIXME: exitContext isnt documented */
1562 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1563 {
1564         HANDLE *handles;
1565         guint32 numhandles;
1566         guint32 ret;
1567         guint32 i;
1568         MonoObject *waitHandle;
1569         MonoInternalThread *thread = mono_thread_internal_current ();
1570
1571         /* Do this WaitSleepJoin check before creating objects */
1572         mono_thread_current_check_pending_interrupt ();
1573
1574         numhandles = mono_array_length(mono_handles);
1575         handles = g_new0(HANDLE, numhandles);
1576
1577         for(i = 0; i < numhandles; i++) {
1578                 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1579                 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1580         }
1581
1582         if(ms== -1) {
1583                 ms=INFINITE;
1584         }
1585
1586         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1587
1588         ret=WaitForMultipleObjectsEx(numhandles, handles, FALSE, ms, TRUE);
1589
1590         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1591
1592         g_free(handles);
1593
1594         THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1595
1596         /*
1597          * These need to be here.  See MSDN dos on WaitForMultipleObjects.
1598          */
1599         if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1600                 return ret - WAIT_OBJECT_0;
1601         }
1602         else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1603                 return ret - WAIT_ABANDONED_0;
1604         }
1605         else {
1606                 return ret;
1607         }
1608 }
1609
1610 /* FIXME: exitContext isnt documented */
1611 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1612 {
1613         guint32 ret;
1614         MonoInternalThread *thread = mono_thread_internal_current ();
1615
1616         THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1617
1618         if(ms== -1) {
1619                 ms=INFINITE;
1620         }
1621
1622         mono_thread_current_check_pending_interrupt ();
1623
1624         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1625
1626         ret=WaitForSingleObjectEx (handle, ms, TRUE);
1627
1628         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1629
1630         if(ret==WAIT_FAILED) {
1631                 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1632                 return(FALSE);
1633         } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1634                 /* Do we want to try again if we get
1635                  * WAIT_IO_COMPLETION? The documentation for
1636                  * WaitHandle doesn't give any clues.  (We'd have to
1637                  * fiddle with the timeout if we retry.)
1638                  */
1639                 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1640                 return(FALSE);
1641         }
1642
1643         return(TRUE);
1644 }
1645
1646 gboolean
1647 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1648 {
1649         guint32 ret;
1650         MonoInternalThread *thread = mono_thread_internal_current ();
1651
1652         MONO_ARCH_SAVE_REGS;
1653
1654         if (ms == -1)
1655                 ms = INFINITE;
1656
1657         mono_thread_current_check_pending_interrupt ();
1658
1659         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1660
1661         ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1662
1663         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1664
1665         return  (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1666 }
1667
1668 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1669 {
1670         HANDLE mutex;
1671
1672         MONO_ARCH_SAVE_REGS;
1673
1674         *created = TRUE;
1675
1676         if (name == NULL) {
1677                 mutex = CreateMutex (NULL, owned, NULL);
1678         } else {
1679                 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1680
1681                 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1682                         *created = FALSE;
1683                 }
1684         }
1685
1686         return(mutex);
1687 }
1688
1689 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1690         MONO_ARCH_SAVE_REGS;
1691
1692         return(ReleaseMutex (handle));
1693 }
1694
1695 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1696                                                             gint32 rights,
1697                                                             gint32 *error)
1698 {
1699         HANDLE ret;
1700
1701         MONO_ARCH_SAVE_REGS;
1702
1703         *error = ERROR_SUCCESS;
1704
1705         ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1706         if (ret == NULL) {
1707                 *error = GetLastError ();
1708         }
1709
1710         return(ret);
1711 }
1712
1713
1714 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1715 {
1716         HANDLE sem;
1717
1718         MONO_ARCH_SAVE_REGS;
1719
1720         *created = TRUE;
1721
1722         if (name == NULL) {
1723                 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1724         } else {
1725                 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1726                                        mono_string_chars (name));
1727
1728                 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1729                         *created = FALSE;
1730                 }
1731         }
1732
1733         return(sem);
1734 }
1735
1736 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1737 {
1738         gint32 prevcount;
1739
1740         MONO_ARCH_SAVE_REGS;
1741
1742         *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1743
1744         return (prevcount);
1745 }
1746
1747 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1748 {
1749         HANDLE ret;
1750
1751         MONO_ARCH_SAVE_REGS;
1752
1753         *error = ERROR_SUCCESS;
1754
1755         ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1756         if (ret == NULL) {
1757                 *error = GetLastError ();
1758         }
1759
1760         return(ret);
1761 }
1762
1763 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1764 {
1765         HANDLE event;
1766
1767         MONO_ARCH_SAVE_REGS;
1768
1769         *created = TRUE;
1770
1771         if (name == NULL) {
1772                 event = CreateEvent (NULL, manual, initial, NULL);
1773         } else {
1774                 event = CreateEvent (NULL, manual, initial,
1775                                      mono_string_chars (name));
1776
1777                 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1778                         *created = FALSE;
1779                 }
1780         }
1781
1782         return(event);
1783 }
1784
1785 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1786         MONO_ARCH_SAVE_REGS;
1787
1788         return (SetEvent(handle));
1789 }
1790
1791 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1792         MONO_ARCH_SAVE_REGS;
1793
1794         return (ResetEvent(handle));
1795 }
1796
1797 void
1798 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1799         MONO_ARCH_SAVE_REGS;
1800
1801         CloseHandle (handle);
1802 }
1803
1804 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1805                                                              gint32 rights,
1806                                                              gint32 *error)
1807 {
1808         HANDLE ret;
1809
1810         MONO_ARCH_SAVE_REGS;
1811
1812         *error = ERROR_SUCCESS;
1813
1814         ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1815         if (ret == NULL) {
1816                 *error = GetLastError ();
1817         }
1818
1819         return(ret);
1820 }
1821
1822 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1823 {
1824         MONO_ARCH_SAVE_REGS;
1825
1826         return InterlockedIncrement (location);
1827 }
1828
1829 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1830 {
1831         gint64 ret;
1832
1833         MONO_ARCH_SAVE_REGS;
1834
1835         mono_interlocked_lock ();
1836
1837         ret = ++ *location;
1838
1839         mono_interlocked_unlock ();
1840
1841
1842         return ret;
1843 }
1844
1845 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1846 {
1847         MONO_ARCH_SAVE_REGS;
1848
1849         return InterlockedDecrement(location);
1850 }
1851
1852 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1853 {
1854         gint64 ret;
1855
1856         MONO_ARCH_SAVE_REGS;
1857
1858         mono_interlocked_lock ();
1859
1860         ret = -- *location;
1861
1862         mono_interlocked_unlock ();
1863
1864         return ret;
1865 }
1866
1867 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1868 {
1869         MONO_ARCH_SAVE_REGS;
1870
1871         return InterlockedExchange(location, value);
1872 }
1873
1874 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1875 {
1876         MonoObject *res;
1877         res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1878         mono_gc_wbarrier_generic_nostore (location);
1879         return res;
1880 }
1881
1882 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1883 {
1884         return InterlockedExchangePointer(location, value);
1885 }
1886
1887 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1888 {
1889         IntFloatUnion val, ret;
1890
1891         MONO_ARCH_SAVE_REGS;
1892
1893         val.fval = value;
1894         ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1895
1896         return ret.fval;
1897 }
1898
1899 gint64
1900 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1901 {
1902 #if SIZEOF_VOID_P == 8
1903         return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1904 #else
1905         gint64 res;
1906
1907         /*
1908          * According to MSDN, this function is only atomic with regards to the
1909          * other Interlocked functions on 32 bit platforms.
1910          */
1911         mono_interlocked_lock ();
1912         res = *location;
1913         *location = value;
1914         mono_interlocked_unlock ();
1915
1916         return res;
1917 #endif
1918 }
1919
1920 gdouble
1921 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1922 {
1923 #if SIZEOF_VOID_P == 8
1924         LongDoubleUnion val, ret;
1925
1926         val.fval = value;
1927         ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1928
1929         return ret.fval;
1930 #else
1931         gdouble res;
1932
1933         /*
1934          * According to MSDN, this function is only atomic with regards to the
1935          * other Interlocked functions on 32 bit platforms.
1936          */
1937         mono_interlocked_lock ();
1938         res = *location;
1939         *location = value;
1940         mono_interlocked_unlock ();
1941
1942         return res;
1943 #endif
1944 }
1945
1946 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1947 {
1948         MONO_ARCH_SAVE_REGS;
1949
1950         return InterlockedCompareExchange(location, value, comparand);
1951 }
1952
1953 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1954 {
1955         MonoObject *res;
1956         res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1957         mono_gc_wbarrier_generic_nostore (location);
1958         return res;
1959 }
1960
1961 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1962 {
1963         return InterlockedCompareExchangePointer(location, value, comparand);
1964 }
1965
1966 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1967 {
1968         IntFloatUnion val, ret, cmp;
1969
1970         MONO_ARCH_SAVE_REGS;
1971
1972         val.fval = value;
1973         cmp.fval = comparand;
1974         ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1975
1976         return ret.fval;
1977 }
1978
1979 gdouble
1980 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1981 {
1982 #if SIZEOF_VOID_P == 8
1983         LongDoubleUnion val, comp, ret;
1984
1985         val.fval = value;
1986         comp.fval = comparand;
1987         ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1988
1989         return ret.fval;
1990 #else
1991         gdouble old;
1992
1993         mono_interlocked_lock ();
1994         old = *location;
1995         if (old == comparand)
1996                 *location = value;
1997         mono_interlocked_unlock ();
1998
1999         return old;
2000 #endif
2001 }
2002
2003 gint64
2004 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2005 {
2006 #if SIZEOF_VOID_P == 8
2007         return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
2008 #else
2009         gint64 old;
2010
2011         mono_interlocked_lock ();
2012         old = *location;
2013         if (old == comparand)
2014                 *location = value;
2015         mono_interlocked_unlock ();
2016
2017         return old;
2018 #endif
2019 }
2020
2021 MonoObject*
2022 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2023 {
2024         MonoObject *res;
2025         res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
2026         mono_gc_wbarrier_generic_nostore (location);
2027         return res;
2028 }
2029
2030 MonoObject*
2031 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2032 {
2033         MonoObject *res;
2034         res = InterlockedExchangePointer ((gpointer *)location, value);
2035         mono_gc_wbarrier_generic_nostore (location);
2036         return res;
2037 }
2038
2039 gint32
2040 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2041 {
2042 #if SIZEOF_VOID_P == 8
2043         /* Should be implemented as a JIT intrinsic */
2044         mono_raise_exception (mono_get_exception_not_implemented (NULL));
2045         return 0;
2046 #else
2047         gint32 orig;
2048
2049         mono_interlocked_lock ();
2050         orig = *location;
2051         *location = orig + value;
2052         mono_interlocked_unlock ();
2053
2054         return orig + value;
2055 #endif
2056 }
2057
2058 gint64
2059 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2060 {
2061 #if SIZEOF_VOID_P == 8
2062         /* Should be implemented as a JIT intrinsic */
2063         mono_raise_exception (mono_get_exception_not_implemented (NULL));
2064         return 0;
2065 #else
2066         gint64 orig;
2067
2068         mono_interlocked_lock ();
2069         orig = *location;
2070         *location = orig + value;
2071         mono_interlocked_unlock ();
2072
2073         return orig + value;
2074 #endif
2075 }
2076
2077 gint64
2078 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2079 {
2080 #if SIZEOF_VOID_P == 8
2081         /* 64 bit reads are already atomic */
2082         return *location;
2083 #else
2084         gint64 res;
2085
2086         mono_interlocked_lock ();
2087         res = *location;
2088         mono_interlocked_unlock ();
2089
2090         return res;
2091 #endif
2092 }
2093
2094 void
2095 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2096 {
2097         mono_threads_lock ();
2098         mono_threads_unlock ();
2099 }
2100
2101 void
2102 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
2103 {
2104         mono_thread_clr_state (this, state);
2105
2106         if (state & ThreadState_Background) {
2107                 /* If the thread changes the background mode, the main thread has to
2108                  * be notified, since it has to rebuild the list of threads to
2109                  * wait for.
2110                  */
2111                 SetEvent (background_change_event);
2112         }
2113 }
2114
2115 void
2116 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
2117 {
2118         mono_thread_set_state (this, state);
2119
2120         if (state & ThreadState_Background) {
2121                 /* If the thread changes the background mode, the main thread has to
2122                  * be notified, since it has to rebuild the list of threads to
2123                  * wait for.
2124                  */
2125                 SetEvent (background_change_event);
2126         }
2127 }
2128
2129 guint32
2130 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2131 {
2132         guint32 state;
2133
2134         ensure_synch_cs_set (this);
2135
2136         EnterCriticalSection (this->synch_cs);
2137
2138         state = this->state;
2139
2140         LeaveCriticalSection (this->synch_cs);
2141
2142         return state;
2143 }
2144
2145 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2146 {
2147         gboolean throw = FALSE;
2148
2149         ensure_synch_cs_set (this);
2150
2151         if (this == mono_thread_internal_current ())
2152                 return;
2153
2154         EnterCriticalSection (this->synch_cs);
2155
2156         this->thread_interrupt_requested = TRUE;
2157
2158         if (this->state & ThreadState_WaitSleepJoin) {
2159                 throw = TRUE;
2160         }
2161
2162         LeaveCriticalSection (this->synch_cs);
2163
2164         if (throw) {
2165                 signal_thread_state_change (this);
2166         }
2167 }
2168
2169 void mono_thread_current_check_pending_interrupt ()
2170 {
2171         MonoInternalThread *thread = mono_thread_internal_current ();
2172         gboolean throw = FALSE;
2173
2174         mono_debugger_check_interruption ();
2175
2176         ensure_synch_cs_set (thread);
2177
2178         EnterCriticalSection (thread->synch_cs);
2179
2180         if (thread->thread_interrupt_requested) {
2181                 throw = TRUE;
2182                 thread->thread_interrupt_requested = FALSE;
2183         }
2184
2185         LeaveCriticalSection (thread->synch_cs);
2186
2187         if (throw) {
2188                 mono_raise_exception (mono_get_exception_thread_interrupted ());
2189         }
2190 }
2191
2192 int
2193 mono_thread_get_abort_signal (void)
2194 {
2195 #ifdef HOST_WIN32
2196         return -1;
2197 #else
2198 #ifndef SIGRTMIN
2199 #ifdef SIGUSR1
2200         return SIGUSR1;
2201 #else
2202         return -1;
2203 #endif
2204 #else
2205         static int abort_signum = -1;
2206         int i;
2207         if (abort_signum != -1)
2208                 return abort_signum;
2209         /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2210         for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2211                 struct sigaction sinfo;
2212                 sigaction (i, NULL, &sinfo);
2213                 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2214                         abort_signum = i;
2215                         return i;
2216                 }
2217         }
2218         /* fallback to the old way */
2219         return SIGRTMIN;
2220 #endif
2221 #endif /* HOST_WIN32 */
2222 }
2223
2224 #ifdef HOST_WIN32
2225 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2226 {
2227         MonoException* exc = mono_thread_request_interruption (FALSE);
2228         if (exc) mono_raise_exception (exc);
2229 }
2230 #endif /* HOST_WIN32 */
2231
2232 /*
2233  * signal_thread_state_change
2234  *
2235  * Tells the thread that his state has changed and it has to enter the new
2236  * state as soon as possible.
2237  */
2238 static void signal_thread_state_change (MonoInternalThread *thread)
2239 {
2240         if (thread == mono_thread_internal_current ()) {
2241                 /* Do it synchronously */
2242                 MonoException *exc = mono_thread_request_interruption (FALSE);
2243                 if (exc)
2244                         mono_raise_exception (exc);
2245         }
2246
2247 #ifdef HOST_WIN32
2248         QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2249 #else
2250         /* fixme: store the state somewhere */
2251 #ifdef PTHREAD_POINTER_ID
2252         pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
2253 #else
2254         pthread_kill (thread->tid, mono_thread_get_abort_signal ());
2255 #endif
2256
2257         /*
2258          * This will cause waits to be broken.
2259          * It will also prevent the thread from entering a wait, so if the thread returns
2260          * from the wait before it receives the abort signal, it will just spin in the wait
2261          * functions in the io-layer until the signal handler calls QueueUserAPC which will
2262          * make it return.
2263          */
2264         wapi_interrupt_thread (thread->handle);
2265 #endif /* HOST_WIN32 */
2266 }
2267
2268 void
2269 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2270 {
2271         ensure_synch_cs_set (thread);
2272
2273         EnterCriticalSection (thread->synch_cs);
2274
2275         if ((thread->state & ThreadState_AbortRequested) != 0 ||
2276                 (thread->state & ThreadState_StopRequested) != 0 ||
2277                 (thread->state & ThreadState_Stopped) != 0)
2278         {
2279                 LeaveCriticalSection (thread->synch_cs);
2280                 return;
2281         }
2282
2283         if ((thread->state & ThreadState_Unstarted) != 0) {
2284                 thread->state |= ThreadState_Aborted;
2285                 LeaveCriticalSection (thread->synch_cs);
2286                 return;
2287         }
2288
2289         thread->state |= ThreadState_AbortRequested;
2290         if (thread->abort_state_handle)
2291                 mono_gchandle_free (thread->abort_state_handle);
2292         if (state) {
2293                 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2294                 g_assert (thread->abort_state_handle);
2295         } else {
2296                 thread->abort_state_handle = 0;
2297         }
2298         thread->abort_exc = NULL;
2299
2300         /*
2301          * abort_exc is set in mono_thread_execute_interruption(),
2302          * triggered by the call to signal_thread_state_change(),
2303          * below.  There's a point between where we have
2304          * abort_state_handle set, but abort_exc NULL, but that's not
2305          * a problem.
2306          */
2307
2308         LeaveCriticalSection (thread->synch_cs);
2309
2310         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2311
2312         /* During shutdown, we can't wait for other threads */
2313         if (!shutting_down)
2314                 /* Make sure the thread is awake */
2315                 mono_thread_resume (thread);
2316
2317         signal_thread_state_change (thread);
2318 }
2319
2320 void
2321 ves_icall_System_Threading_Thread_ResetAbort (void)
2322 {
2323         MonoInternalThread *thread = mono_thread_internal_current ();
2324
2325         ensure_synch_cs_set (thread);
2326
2327         EnterCriticalSection (thread->synch_cs);
2328
2329         thread->state &= ~ThreadState_AbortRequested;
2330
2331         if (!thread->abort_exc) {
2332                 const char *msg = "Unable to reset abort because no abort was requested";
2333                 LeaveCriticalSection (thread->synch_cs);
2334                 mono_raise_exception (mono_get_exception_thread_state (msg));
2335         } else {
2336                 thread->abort_exc = NULL;
2337                 if (thread->abort_state_handle) {
2338                         mono_gchandle_free (thread->abort_state_handle);
2339                         /* This is actually not necessary - the handle
2340                            only counts if the exception is set */
2341                         thread->abort_state_handle = 0;
2342                 }
2343         }
2344
2345         LeaveCriticalSection (thread->synch_cs);
2346 }
2347
2348 void
2349 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2350 {
2351         ensure_synch_cs_set (thread);
2352
2353         EnterCriticalSection (thread->synch_cs);
2354
2355         thread->state &= ~ThreadState_AbortRequested;
2356
2357         if (thread->abort_exc) {
2358                 thread->abort_exc = NULL;
2359                 if (thread->abort_state_handle) {
2360                         mono_gchandle_free (thread->abort_state_handle);
2361                         /* This is actually not necessary - the handle
2362                            only counts if the exception is set */
2363                         thread->abort_state_handle = 0;
2364                 }
2365         }
2366
2367         LeaveCriticalSection (thread->synch_cs);
2368 }
2369
2370 MonoObject*
2371 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2372 {
2373         MonoInternalThread *thread = this->internal_thread;
2374         MonoObject *state, *deserialized = NULL, *exc;
2375         MonoDomain *domain;
2376
2377         if (!thread->abort_state_handle)
2378                 return NULL;
2379
2380         state = mono_gchandle_get_target (thread->abort_state_handle);
2381         g_assert (state);
2382
2383         domain = mono_domain_get ();
2384         if (mono_object_domain (state) == domain)
2385                 return state;
2386
2387         deserialized = mono_object_xdomain_representation (state, domain, &exc);
2388
2389         if (!deserialized) {
2390                 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2391                 if (exc)
2392                         MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2393                 mono_raise_exception (invalid_op_exc);
2394         }
2395
2396         return deserialized;
2397 }
2398
2399 static gboolean
2400 mono_thread_suspend (MonoInternalThread *thread)
2401 {
2402         ensure_synch_cs_set (thread);
2403
2404         EnterCriticalSection (thread->synch_cs);
2405
2406         if ((thread->state & ThreadState_Unstarted) != 0 ||
2407                 (thread->state & ThreadState_Aborted) != 0 ||
2408                 (thread->state & ThreadState_Stopped) != 0)
2409         {
2410                 LeaveCriticalSection (thread->synch_cs);
2411                 return FALSE;
2412         }
2413
2414         if ((thread->state & ThreadState_Suspended) != 0 ||
2415                 (thread->state & ThreadState_SuspendRequested) != 0 ||
2416                 (thread->state & ThreadState_StopRequested) != 0)
2417         {
2418                 LeaveCriticalSection (thread->synch_cs);
2419                 return TRUE;
2420         }
2421
2422         thread->state |= ThreadState_SuspendRequested;
2423
2424         LeaveCriticalSection (thread->synch_cs);
2425
2426         signal_thread_state_change (thread);
2427         return TRUE;
2428 }
2429
2430 void
2431 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2432 {
2433         if (!mono_thread_suspend (thread))
2434                 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2435 }
2436
2437 static gboolean
2438 mono_thread_resume (MonoInternalThread *thread)
2439 {
2440         ensure_synch_cs_set (thread);
2441
2442         EnterCriticalSection (thread->synch_cs);
2443
2444         if ((thread->state & ThreadState_SuspendRequested) != 0) {
2445                 thread->state &= ~ThreadState_SuspendRequested;
2446                 LeaveCriticalSection (thread->synch_cs);
2447                 return TRUE;
2448         }
2449
2450         if ((thread->state & ThreadState_Suspended) == 0 ||
2451                 (thread->state & ThreadState_Unstarted) != 0 ||
2452                 (thread->state & ThreadState_Aborted) != 0 ||
2453                 (thread->state & ThreadState_Stopped) != 0)
2454         {
2455                 LeaveCriticalSection (thread->synch_cs);
2456                 return FALSE;
2457         }
2458
2459         thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2460         if (thread->resume_event == NULL) {
2461                 LeaveCriticalSection (thread->synch_cs);
2462                 return(FALSE);
2463         }
2464
2465         /* Awake the thread */
2466         SetEvent (thread->suspend_event);
2467
2468         LeaveCriticalSection (thread->synch_cs);
2469
2470         /* Wait for the thread to awake */
2471         WaitForSingleObject (thread->resume_event, INFINITE);
2472         CloseHandle (thread->resume_event);
2473         thread->resume_event = NULL;
2474
2475         return TRUE;
2476 }
2477
2478 void
2479 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2480 {
2481         if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2482                 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2483 }
2484
2485 static gboolean
2486 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2487 {
2488         if (managed)
2489                 return TRUE;
2490
2491         if (m->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
2492                 m->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
2493                 m->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH)
2494         {
2495                 *((gboolean*)data) = TRUE;
2496                 return TRUE;
2497         }
2498         return FALSE;
2499 }
2500
2501 static gboolean
2502 is_running_protected_wrapper (void)
2503 {
2504         gboolean found = FALSE;
2505         mono_stack_walk (find_wrapper, &found);
2506         return found;
2507 }
2508
2509 void mono_thread_internal_stop (MonoInternalThread *thread)
2510 {
2511         ensure_synch_cs_set (thread);
2512
2513         EnterCriticalSection (thread->synch_cs);
2514
2515         if ((thread->state & ThreadState_StopRequested) != 0 ||
2516                 (thread->state & ThreadState_Stopped) != 0)
2517         {
2518                 LeaveCriticalSection (thread->synch_cs);
2519                 return;
2520         }
2521
2522         /* Make sure the thread is awake */
2523         mono_thread_resume (thread);
2524
2525         thread->state |= ThreadState_StopRequested;
2526         thread->state &= ~ThreadState_AbortRequested;
2527
2528         LeaveCriticalSection (thread->synch_cs);
2529
2530         signal_thread_state_change (thread);
2531 }
2532
2533 void mono_thread_stop (MonoThread *thread)
2534 {
2535         mono_thread_internal_stop (thread->internal_thread);
2536 }
2537
2538 gint8
2539 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2540 {
2541         return *((volatile gint8 *) (ptr));
2542 }
2543
2544 gint16
2545 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2546 {
2547         return *((volatile gint16 *) (ptr));
2548 }
2549
2550 gint32
2551 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2552 {
2553         return *((volatile gint32 *) (ptr));
2554 }
2555
2556 gint64
2557 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2558 {
2559         return *((volatile gint64 *) (ptr));
2560 }
2561
2562 void *
2563 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2564 {
2565         return (void *)  *((volatile void **) ptr);
2566 }
2567
2568 void
2569 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2570 {
2571         *((volatile gint8 *) ptr) = value;
2572 }
2573
2574 void
2575 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2576 {
2577         *((volatile gint16 *) ptr) = value;
2578 }
2579
2580 void
2581 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2582 {
2583         *((volatile gint32 *) ptr) = value;
2584 }
2585
2586 void
2587 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2588 {
2589         *((volatile gint64 *) ptr) = value;
2590 }
2591
2592 void
2593 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2594 {
2595         *((volatile void **) ptr) = value;
2596 }
2597
2598 void
2599 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2600 {
2601         mono_gc_wbarrier_generic_store (ptr, value);
2602 }
2603
2604 void mono_thread_init (MonoThreadStartCB start_cb,
2605                        MonoThreadAttachCB attach_cb)
2606 {
2607         MONO_GC_REGISTER_ROOT (small_id_table);
2608         InitializeCriticalSection(&threads_mutex);
2609         InitializeCriticalSection(&interlocked_mutex);
2610         InitializeCriticalSection(&contexts_mutex);
2611         InitializeCriticalSection(&delayed_free_table_mutex);
2612         InitializeCriticalSection(&small_id_mutex);
2613
2614         background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2615         g_assert(background_change_event != NULL);
2616
2617         mono_init_static_data_info (&thread_static_info);
2618         mono_init_static_data_info (&context_static_info);
2619
2620         current_object_key=TlsAlloc();
2621         THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2622
2623         mono_thread_start_cb = start_cb;
2624         mono_thread_attach_cb = attach_cb;
2625
2626         delayed_free_table = g_array_new (FALSE, FALSE, sizeof (DelayedFreeItem));
2627
2628         /* Get a pseudo handle to the current process.  This is just a
2629          * kludge so that wapi can build a process handle if needed.
2630          * As a pseudo handle is returned, we don't need to clean
2631          * anything up.
2632          */
2633         GetCurrentProcess ();
2634 }
2635
2636 void mono_thread_cleanup (void)
2637 {
2638         mono_thread_hazardous_try_free_all ();
2639
2640 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2641         /* The main thread must abandon any held mutexes (particularly
2642          * important for named mutexes as they are shared across
2643          * processes, see bug 74680.)  This will happen when the
2644          * thread exits, but if it's not running in a subthread it
2645          * won't exit in time.
2646          */
2647         /* Using non-w32 API is a nasty kludge, but I couldn't find
2648          * anything in the documentation that would let me do this
2649          * here yet still be safe to call on windows.
2650          */
2651         _wapi_thread_signal_self (mono_environment_exitcode_get ());
2652 #endif
2653
2654 #if 0
2655         /* This stuff needs more testing, it seems one of these
2656          * critical sections can be locked when mono_thread_cleanup is
2657          * called.
2658          */
2659         DeleteCriticalSection (&threads_mutex);
2660         DeleteCriticalSection (&interlocked_mutex);
2661         DeleteCriticalSection (&contexts_mutex);
2662         DeleteCriticalSection (&delayed_free_table_mutex);
2663         DeleteCriticalSection (&small_id_mutex);
2664         CloseHandle (background_change_event);
2665 #endif
2666
2667         g_array_free (delayed_free_table, TRUE);
2668         delayed_free_table = NULL;
2669
2670         TlsFree (current_object_key);
2671 }
2672
2673 void
2674 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2675 {
2676         mono_thread_cleanup_fn = func;
2677 }
2678
2679 void
2680 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2681 {
2682         thread->internal_thread->manage_callback = func;
2683 }
2684
2685 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2686 {
2687         mono_thread_notify_pending_exc_fn = func;
2688 }
2689
2690 G_GNUC_UNUSED
2691 static void print_tids (gpointer key, gpointer value, gpointer user)
2692 {
2693         /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2694          * sizeof(uint) and a cast to uint would overflow
2695          */
2696         /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2697          * print this as a pointer.
2698          */
2699         g_message ("Waiting for: %p", key);
2700 }
2701
2702 struct wait_data
2703 {
2704         HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2705         MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2706         guint32 num;
2707 };
2708
2709 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2710 {
2711         guint32 i, ret;
2712
2713         THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2714
2715         ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, FALSE);
2716
2717         if(ret==WAIT_FAILED) {
2718                 /* See the comment in build_wait_tids() */
2719                 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2720                 return;
2721         }
2722
2723         for(i=0; i<wait->num; i++)
2724                 CloseHandle (wait->handles[i]);
2725
2726         if (ret == WAIT_TIMEOUT)
2727                 return;
2728
2729         for(i=0; i<wait->num; i++) {
2730                 gsize tid = wait->threads[i]->tid;
2731
2732                 mono_threads_lock ();
2733                 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2734                         /* This thread must have been killed, because
2735                          * it hasn't cleaned itself up. (It's just
2736                          * possible that the thread exited before the
2737                          * parent thread had a chance to store the
2738                          * handle, and now there is another pointer to
2739                          * the already-exited thread stored.  In this
2740                          * case, we'll just get two
2741                          * mono_profiler_thread_end() calls for the
2742                          * same thread.)
2743                          */
2744
2745                         mono_threads_unlock ();
2746                         THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2747                         thread_cleanup (wait->threads[i]);
2748                 } else {
2749                         mono_threads_unlock ();
2750                 }
2751         }
2752 }
2753
2754 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2755 {
2756         guint32 i, ret, count;
2757
2758         THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2759
2760         /* Add the thread state change event, so it wakes up if a thread changes
2761          * to background mode.
2762          */
2763         count = wait->num;
2764         if (count < MAXIMUM_WAIT_OBJECTS) {
2765                 wait->handles [count] = background_change_event;
2766                 count++;
2767         }
2768
2769         ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, FALSE);
2770
2771         if(ret==WAIT_FAILED) {
2772                 /* See the comment in build_wait_tids() */
2773                 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2774                 return;
2775         }
2776
2777         for(i=0; i<wait->num; i++)
2778                 CloseHandle (wait->handles[i]);
2779
2780         if (ret == WAIT_TIMEOUT)
2781                 return;
2782
2783         if (ret < wait->num) {
2784                 gsize tid = wait->threads[ret]->tid;
2785                 mono_threads_lock ();
2786                 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2787                         /* See comment in wait_for_tids about thread cleanup */
2788                         mono_threads_unlock ();
2789                         THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2790                         thread_cleanup (wait->threads [ret]);
2791                 } else
2792                         mono_threads_unlock ();
2793         }
2794 }
2795
2796 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2797 {
2798         struct wait_data *wait=(struct wait_data *)user;
2799
2800         if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2801                 HANDLE handle;
2802                 MonoInternalThread *thread=(MonoInternalThread *)value;
2803
2804                 /* Ignore background threads, we abort them later */
2805                 /* Do not lock here since it is not needed and the caller holds threads_lock */
2806                 if (thread->state & ThreadState_Background) {
2807                         THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2808                         return; /* just leave, ignore */
2809                 }
2810
2811                 if (mono_gc_is_finalizer_internal_thread (thread)) {
2812                         THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2813                         return;
2814                 }
2815
2816                 if (thread == mono_thread_internal_current ()) {
2817                         THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2818                         return;
2819                 }
2820
2821                 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2822                         THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2823                         return;
2824                 }
2825
2826                 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2827                         THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2828                         return;
2829                 }
2830
2831                 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2832                 if (handle == NULL) {
2833                         THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2834                         return;
2835                 }
2836
2837                 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2838                 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2839                         wait->handles[wait->num]=handle;
2840                         wait->threads[wait->num]=thread;
2841                         wait->num++;
2842
2843                         THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2844                 } else {
2845                         THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2846                 }
2847
2848
2849         } else {
2850                 /* Just ignore the rest, we can't do anything with
2851                  * them yet
2852                  */
2853         }
2854 }
2855
2856 static gboolean
2857 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2858 {
2859         struct wait_data *wait=(struct wait_data *)user;
2860         gsize self = GetCurrentThreadId ();
2861         MonoInternalThread *thread = value;
2862         HANDLE handle;
2863
2864         if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2865                 return FALSE;
2866
2867         /* The finalizer thread is not a background thread */
2868         if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2869                 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2870
2871                 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2872                 if (handle == NULL)
2873                         return FALSE;
2874
2875                 /* printf ("A: %d\n", wait->num); */
2876                 wait->handles[wait->num]=thread->handle;
2877                 wait->threads[wait->num]=thread;
2878                 wait->num++;
2879
2880                 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2881                 mono_thread_internal_stop (thread);
2882                 return TRUE;
2883         }
2884
2885         return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2886 }
2887
2888 /**
2889  * mono_threads_set_shutting_down:
2890  *
2891  * Is called by a thread that wants to shut down Mono. If the runtime is already
2892  * shutting down, the calling thread is suspended/stopped, and this function never
2893  * returns.
2894  */
2895 void
2896 mono_threads_set_shutting_down (void)
2897 {
2898         MonoInternalThread *current_thread = mono_thread_internal_current ();
2899
2900         mono_threads_lock ();
2901
2902         if (shutting_down) {
2903                 mono_threads_unlock ();
2904
2905                 /* Make sure we're properly suspended/stopped */
2906
2907                 EnterCriticalSection (current_thread->synch_cs);
2908
2909                 if ((current_thread->state & ThreadState_SuspendRequested) ||
2910                     (current_thread->state & ThreadState_AbortRequested) ||
2911                     (current_thread->state & ThreadState_StopRequested)) {
2912                         LeaveCriticalSection (current_thread->synch_cs);
2913                         mono_thread_execute_interruption (current_thread);
2914                 } else {
2915                         current_thread->state |= ThreadState_Stopped;
2916                         LeaveCriticalSection (current_thread->synch_cs);
2917                 }
2918
2919                 /* Wake up other threads potentially waiting for us */
2920                 ExitThread (0);
2921         } else {
2922                 shutting_down = TRUE;
2923
2924                 /* Not really a background state change, but this will
2925                  * interrupt the main thread if it is waiting for all
2926                  * the other threads.
2927                  */
2928                 SetEvent (background_change_event);
2929
2930                 mono_threads_unlock ();
2931         }
2932 }
2933
2934 /**
2935  * mono_threads_is_shutting_down:
2936  *
2937  * Returns whether a thread has commenced shutdown of Mono.  Note that
2938  * if the function returns FALSE the caller must not assume that
2939  * shutdown is not in progress, because the situation might have
2940  * changed since the function returned.  For that reason this function
2941  * is of very limited utility.
2942  */
2943 gboolean
2944 mono_threads_is_shutting_down (void)
2945 {
2946         return shutting_down;
2947 }
2948
2949 void mono_thread_manage (void)
2950 {
2951         struct wait_data *wait=g_new0 (struct wait_data, 1);
2952
2953         /* join each thread that's still running */
2954         THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2955
2956         mono_threads_lock ();
2957         if(threads==NULL) {
2958                 THREAD_DEBUG (g_message("%s: No threads", __func__));
2959                 mono_threads_unlock ();
2960                 g_free (wait);
2961                 return;
2962         }
2963         mono_threads_unlock ();
2964
2965         do {
2966                 mono_threads_lock ();
2967                 if (shutting_down) {
2968                         /* somebody else is shutting down */
2969                         mono_threads_unlock ();
2970                         break;
2971                 }
2972                 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2973                         mono_g_hash_table_foreach (threads, print_tids, NULL));
2974
2975                 ResetEvent (background_change_event);
2976                 wait->num=0;
2977                 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2978                 mono_threads_unlock ();
2979                 if(wait->num>0) {
2980                         /* Something to wait for */
2981                         wait_for_tids_or_state_change (wait, INFINITE);
2982                 }
2983                 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2984         } while(wait->num>0);
2985
2986         mono_threads_set_shutting_down ();
2987
2988         /* No new threads will be created after this point */
2989
2990         mono_runtime_set_shutting_down ();
2991
2992         THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
2993         mono_thread_pool_cleanup ();
2994
2995         /*
2996          * Remove everything but the finalizer thread and self.
2997          * Also abort all the background threads
2998          * */
2999         do {
3000                 mono_threads_lock ();
3001
3002                 wait->num = 0;
3003                 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3004
3005                 mono_threads_unlock ();
3006
3007                 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3008                 if(wait->num>0) {
3009                         /* Something to wait for */
3010                         wait_for_tids (wait, INFINITE);
3011                 }
3012         } while (wait->num > 0);
3013
3014         /*
3015          * give the subthreads a chance to really quit (this is mainly needed
3016          * to get correct user and system times from getrusage/wait/time(1)).
3017          * This could be removed if we avoid pthread_detach() and use pthread_join().
3018          */
3019 #ifndef HOST_WIN32
3020         sched_yield ();
3021 #endif
3022
3023         g_free (wait);
3024 }
3025
3026 static void terminate_thread (gpointer key, gpointer value, gpointer user)
3027 {
3028         MonoInternalThread *thread=(MonoInternalThread *)value;
3029
3030         if(thread->tid != (gsize)user) {
3031                 /*TerminateThread (thread->handle, -1);*/
3032         }
3033 }
3034
3035 void mono_thread_abort_all_other_threads (void)
3036 {
3037         gsize self = GetCurrentThreadId ();
3038
3039         mono_threads_lock ();
3040         THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
3041                                  mono_g_hash_table_size (threads));
3042                       mono_g_hash_table_foreach (threads, print_tids, NULL));
3043
3044         mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
3045
3046         mono_threads_unlock ();
3047 }
3048
3049 static void
3050 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3051 {
3052         MonoInternalThread *thread = (MonoInternalThread*)value;
3053         struct wait_data *wait = (struct wait_data*)user_data;
3054         HANDLE handle;
3055
3056         /*
3057          * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3058          * limitation.
3059          * This needs no locking.
3060          */
3061         if ((thread->state & ThreadState_Suspended) != 0 ||
3062                 (thread->state & ThreadState_Stopped) != 0)
3063                 return;
3064
3065         if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3066                 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3067                 if (handle == NULL)
3068                         return;
3069
3070                 wait->handles [wait->num] = handle;
3071                 wait->threads [wait->num] = thread;
3072                 wait->num++;
3073         }
3074 }
3075
3076 /*
3077  * mono_thread_suspend_all_other_threads:
3078  *
3079  *  Suspend all managed threads except the finalizer thread and this thread. It is
3080  * not possible to resume them later.
3081  */
3082 void mono_thread_suspend_all_other_threads (void)
3083 {
3084         struct wait_data *wait = g_new0 (struct wait_data, 1);
3085         int i;
3086         gsize self = GetCurrentThreadId ();
3087         gpointer *events;
3088         guint32 eventidx = 0;
3089         gboolean starting, finished;
3090
3091         /*
3092          * The other threads could be in an arbitrary state at this point, i.e.
3093          * they could be starting up, shutting down etc. This means that there could be
3094          * threads which are not even in the threads hash table yet.
3095          */
3096
3097         /*
3098          * First we set a barrier which will be checked by all threads before they
3099          * are added to the threads hash table, and they will exit if the flag is set.
3100          * This ensures that no threads could be added to the hash later.
3101          * We will use shutting_down as the barrier for now.
3102          */
3103         g_assert (shutting_down);
3104
3105         /*
3106          * We make multiple calls to WaitForMultipleObjects since:
3107          * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3108          * - some threads could exit without becoming suspended
3109          */
3110         finished = FALSE;
3111         while (!finished) {
3112                 /*
3113                  * Make a copy of the hashtable since we can't do anything with
3114                  * threads while threads_mutex is held.
3115                  */
3116                 wait->num = 0;
3117                 mono_threads_lock ();
3118                 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3119                 mono_threads_unlock ();
3120
3121                 events = g_new0 (gpointer, wait->num);
3122                 eventidx = 0;
3123                 /* Get the suspended events that we'll be waiting for */
3124                 for (i = 0; i < wait->num; ++i) {
3125                         MonoInternalThread *thread = wait->threads [i];
3126                         gboolean signal_suspend = FALSE;
3127
3128                         if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3129                                 //CloseHandle (wait->handles [i]);
3130                                 wait->threads [i] = NULL; /* ignore this thread in next loop */
3131                                 continue;
3132                         }
3133
3134                         ensure_synch_cs_set (thread);
3135
3136                         EnterCriticalSection (thread->synch_cs);
3137
3138                         if (thread->suspended_event == NULL) {
3139                                 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3140                                 if (thread->suspended_event == NULL) {
3141                                         /* Forget this one and go on to the next */
3142                                         LeaveCriticalSection (thread->synch_cs);
3143                                         continue;
3144                                 }
3145                         }
3146
3147                         if ((thread->state & ThreadState_Suspended) != 0 ||
3148                                 (thread->state & ThreadState_StopRequested) != 0 ||
3149                                 (thread->state & ThreadState_Stopped) != 0) {
3150                                 LeaveCriticalSection (thread->synch_cs);
3151                                 CloseHandle (wait->handles [i]);
3152                                 wait->threads [i] = NULL; /* ignore this thread in next loop */
3153                                 continue;
3154                         }
3155
3156                         if ((thread->state & ThreadState_SuspendRequested) == 0)
3157                                 signal_suspend = TRUE;
3158
3159                         events [eventidx++] = thread->suspended_event;
3160
3161                         /* Convert abort requests into suspend requests */
3162                         if ((thread->state & ThreadState_AbortRequested) != 0)
3163                                 thread->state &= ~ThreadState_AbortRequested;
3164
3165                         thread->state |= ThreadState_SuspendRequested;
3166
3167                         LeaveCriticalSection (thread->synch_cs);
3168
3169                         /* Signal the thread to suspend */
3170                         if (signal_suspend)
3171                                 signal_thread_state_change (thread);
3172                 }
3173
3174                 if (eventidx > 0) {
3175                         WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3176                         for (i = 0; i < wait->num; ++i) {
3177                                 MonoInternalThread *thread = wait->threads [i];
3178
3179                                 if (thread == NULL)
3180                                         continue;
3181
3182                                 EnterCriticalSection (thread->synch_cs);
3183                                 if ((thread->state & ThreadState_Suspended) != 0) {
3184                                         CloseHandle (thread->suspended_event);
3185                                         thread->suspended_event = NULL;
3186                                 }
3187                                 LeaveCriticalSection (thread->synch_cs);
3188                         }
3189                 } else {
3190                         /*
3191                          * If there are threads which are starting up, we wait until they
3192                          * are suspended when they try to register in the threads hash.
3193                          * This is guaranteed to finish, since the threads which can create new
3194                          * threads get suspended after a while.
3195                          * FIXME: The finalizer thread can still create new threads.
3196                          */
3197                         mono_threads_lock ();
3198                         if (threads_starting_up)
3199                                 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3200                         else
3201                                 starting = FALSE;
3202                         mono_threads_unlock ();
3203                         if (starting)
3204                                 Sleep (100);
3205                         else
3206                                 finished = TRUE;
3207                 }
3208
3209                 g_free (events);
3210         }
3211
3212         g_free (wait);
3213 }
3214
3215 static void
3216 collect_threads (gpointer key, gpointer value, gpointer user_data)
3217 {
3218         MonoInternalThread *thread = (MonoInternalThread*)value;
3219         struct wait_data *wait = (struct wait_data*)user_data;
3220         HANDLE handle;
3221
3222         if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3223                 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3224                 if (handle == NULL)
3225                         return;
3226
3227                 wait->handles [wait->num] = handle;
3228                 wait->threads [wait->num] = thread;
3229                 wait->num++;
3230         }
3231 }
3232
3233 /**
3234  * mono_threads_request_thread_dump:
3235  *
3236  *   Ask all threads except the current to print their stacktrace to stdout.
3237  */
3238 void
3239 mono_threads_request_thread_dump (void)
3240 {
3241         struct wait_data *wait = g_new0 (struct wait_data, 1);
3242         int i;
3243
3244         /*
3245          * Make a copy of the hashtable since we can't do anything with
3246          * threads while threads_mutex is held.
3247          */
3248         mono_threads_lock ();
3249         mono_g_hash_table_foreach (threads, collect_threads, wait);
3250         mono_threads_unlock ();
3251
3252         for (i = 0; i < wait->num; ++i) {
3253                 MonoInternalThread *thread = wait->threads [i];
3254
3255                 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3256                                 (thread != mono_thread_internal_current ()) &&
3257                                 !thread->thread_dump_requested) {
3258                         thread->thread_dump_requested = TRUE;
3259
3260                         signal_thread_state_change (thread);
3261                 }
3262
3263                 CloseHandle (wait->handles [i]);
3264         }
3265 }
3266
3267 /*
3268  * mono_thread_push_appdomain_ref:
3269  *
3270  *   Register that the current thread may have references to objects in domain
3271  * @domain on its stack. Each call to this function should be paired with a
3272  * call to pop_appdomain_ref.
3273  */
3274 void
3275 mono_thread_push_appdomain_ref (MonoDomain *domain)
3276 {
3277         MonoInternalThread *thread = mono_thread_internal_current ();
3278
3279         if (thread) {
3280                 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3281                 mono_threads_lock ();
3282                 thread->appdomain_refs = g_slist_prepend (thread->appdomain_refs, domain);
3283                 mono_threads_unlock ();
3284         }
3285 }
3286
3287 void
3288 mono_thread_pop_appdomain_ref (void)
3289 {
3290         MonoInternalThread *thread = mono_thread_internal_current ();
3291
3292         if (thread) {
3293                 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3294                 mono_threads_lock ();
3295                 /* FIXME: How can the list be empty ? */
3296                 if (thread->appdomain_refs)
3297                         thread->appdomain_refs = g_slist_remove (thread->appdomain_refs, thread->appdomain_refs->data);
3298                 mono_threads_unlock ();
3299         }
3300 }
3301
3302 gboolean
3303 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3304 {
3305         gboolean res;
3306         mono_threads_lock ();
3307         res = g_slist_find (thread->appdomain_refs, domain) != NULL;
3308         mono_threads_unlock ();
3309         return res;
3310 }
3311
3312 gboolean
3313 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3314 {
3315         return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3316 }
3317
3318 typedef struct abort_appdomain_data {
3319         struct wait_data wait;
3320         MonoDomain *domain;
3321 } abort_appdomain_data;
3322
3323 static void
3324 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3325 {
3326         MonoInternalThread *thread = (MonoInternalThread*)value;
3327         abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3328         MonoDomain *domain = data->domain;
3329
3330         if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3331                 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3332
3333                 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3334                         HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3335                         if (handle == NULL)
3336                                 return;
3337                         data->wait.handles [data->wait.num] = handle;
3338                         data->wait.threads [data->wait.num] = thread;
3339                         data->wait.num++;
3340                 } else {
3341                         /* Just ignore the rest, we can't do anything with
3342                          * them yet
3343                          */
3344                 }
3345         }
3346 }
3347
3348 /*
3349  * mono_threads_abort_appdomain_threads:
3350  *
3351  *   Abort threads which has references to the given appdomain.
3352  */
3353 gboolean
3354 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3355 {
3356         abort_appdomain_data user_data;
3357         guint32 start_time;
3358         int orig_timeout = timeout;
3359         int i;
3360
3361         THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3362
3363         start_time = mono_msec_ticks ();
3364         do {
3365                 mono_threads_lock ();
3366
3367                 user_data.domain = domain;
3368                 user_data.wait.num = 0;
3369                 /* This shouldn't take any locks */
3370                 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3371                 mono_threads_unlock ();
3372
3373                 if (user_data.wait.num > 0) {
3374                         /* Abort the threads outside the threads lock */
3375                         for (i = 0; i < user_data.wait.num; ++i)
3376                                 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3377
3378                         /*
3379                          * We should wait for the threads either to abort, or to leave the
3380                          * domain. We can't do the latter, so we wait with a timeout.
3381                          */
3382                         wait_for_tids (&user_data.wait, 100);
3383                 }
3384
3385                 /* Update remaining time */
3386                 timeout -= mono_msec_ticks () - start_time;
3387                 start_time = mono_msec_ticks ();
3388
3389                 if (orig_timeout != -1 && timeout < 0)
3390                         return FALSE;
3391         }
3392         while (user_data.wait.num > 0);
3393
3394         THREAD_DEBUG (g_message ("%s: abort done", __func__));
3395
3396         return TRUE;
3397 }
3398
3399 static void
3400 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3401 {
3402         MonoInternalThread *thread = (MonoInternalThread*)value;
3403         MonoDomain *domain = (MonoDomain*)user_data;
3404         int i;
3405
3406         /* No locking needed here */
3407         /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3408
3409         if (thread->cached_culture_info) {
3410                 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3411                         MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3412                         if (obj && obj->vtable->domain == domain)
3413                                 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3414                 }
3415         }
3416 }
3417
3418 /*
3419  * mono_threads_clear_cached_culture:
3420  *
3421  *   Clear the cached_current_culture from all threads if it is in the
3422  * given appdomain.
3423  */
3424 void
3425 mono_threads_clear_cached_culture (MonoDomain *domain)
3426 {
3427         mono_threads_lock ();
3428         mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3429         mono_threads_unlock ();
3430 }
3431
3432 /*
3433  * mono_thread_get_undeniable_exception:
3434  *
3435  *   Return an exception which needs to be raised when leaving a catch clause.
3436  * This is used for undeniable exception propagation.
3437  */
3438 MonoException*
3439 mono_thread_get_undeniable_exception (void)
3440 {
3441         MonoInternalThread *thread = mono_thread_internal_current ();
3442
3443         if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3444                 /*
3445                  * FIXME: Clear the abort exception and return an AppDomainUnloaded
3446                  * exception if the thread no longer references a dying appdomain.
3447                  */
3448                 thread->abort_exc->trace_ips = NULL;
3449                 thread->abort_exc->stack_trace = NULL;
3450                 return thread->abort_exc;
3451         }
3452
3453         return NULL;
3454 }
3455
3456 #if MONO_SMALL_CONFIG
3457 #define NUM_STATIC_DATA_IDX 4
3458 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3459         64, 256, 1024, 4096
3460 };
3461 #else
3462 #define NUM_STATIC_DATA_IDX 8
3463 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3464         1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3465 };
3466 #endif
3467
3468 /*
3469  *  mono_alloc_static_data
3470  *
3471  *   Allocate memory blocks for storing threads or context static data
3472  */
3473 static void
3474 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset)
3475 {
3476         guint idx = (offset >> 24) - 1;
3477         int i;
3478
3479         gpointer* static_data = *static_data_ptr;
3480         if (!static_data) {
3481                 static_data = mono_gc_alloc_fixed (static_data_size [0], NULL);
3482                 *static_data_ptr = static_data;
3483                 static_data [0] = static_data;
3484         }
3485
3486         for (i = 1; i <= idx; ++i) {
3487                 if (static_data [i])
3488                         continue;
3489                 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3490         }
3491 }
3492
3493 /*
3494  *  mono_init_static_data_info
3495  *
3496  *   Initializes static data counters
3497  */
3498 static void mono_init_static_data_info (StaticDataInfo *static_data)
3499 {
3500         static_data->idx = 0;
3501         static_data->offset = 0;
3502         static_data->freelist = NULL;
3503 }
3504
3505 /*
3506  *  mono_alloc_static_data_slot
3507  *
3508  *   Generates an offset for static data. static_data contains the counters
3509  *  used to generate it.
3510  */
3511 static guint32
3512 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3513 {
3514         guint32 offset;
3515
3516         if (!static_data->idx && !static_data->offset) {
3517                 /*
3518                  * we use the first chunk of the first allocation also as
3519                  * an array for the rest of the data
3520                  */
3521                 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3522         }
3523         static_data->offset += align - 1;
3524         static_data->offset &= ~(align - 1);
3525         if (static_data->offset + size >= static_data_size [static_data->idx]) {
3526                 static_data->idx ++;
3527                 g_assert (size <= static_data_size [static_data->idx]);
3528                 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3529                 static_data->offset = 0;
3530         }
3531         offset = static_data->offset | ((static_data->idx + 1) << 24);
3532         static_data->offset += size;
3533         return offset;
3534 }
3535
3536 /*
3537  * ensure thread static fields already allocated are valid for thread
3538  * This function is called when a thread is created or on thread attach.
3539  */
3540 static void
3541 thread_adjust_static_data (MonoInternalThread *thread)
3542 {
3543         guint32 offset;
3544
3545         mono_threads_lock ();
3546         if (thread_static_info.offset || thread_static_info.idx > 0) {
3547                 /* get the current allocated size */
3548                 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3549                 mono_alloc_static_data (&(thread->static_data), offset);
3550         }
3551         mono_threads_unlock ();
3552 }
3553
3554 static void
3555 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3556 {
3557         MonoInternalThread *thread = value;
3558         guint32 offset = GPOINTER_TO_UINT (user);
3559
3560         mono_alloc_static_data (&(thread->static_data), offset);
3561 }
3562
3563 static MonoThreadDomainTls*
3564 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3565 {
3566         MonoThreadDomainTls* prev = NULL;
3567         MonoThreadDomainTls* tmp = static_data->freelist;
3568         while (tmp) {
3569                 if (tmp->size == size) {
3570                         if (prev)
3571                                 prev->next = tmp->next;
3572                         else
3573                                 static_data->freelist = tmp->next;
3574                         return tmp;
3575                 }
3576                 tmp = tmp->next;
3577         }
3578         return NULL;
3579 }
3580
3581 /*
3582  * The offset for a special static variable is composed of three parts:
3583  * a bit that indicates the type of static data (0:thread, 1:context),
3584  * an index in the array of chunks of memory for the thread (thread->static_data)
3585  * and an offset in that chunk of mem. This allows allocating less memory in the
3586  * common case.
3587  */
3588
3589 guint32
3590 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align)
3591 {
3592         guint32 offset;
3593         if (static_type == SPECIAL_STATIC_THREAD)
3594         {
3595                 MonoThreadDomainTls *item;
3596                 mono_threads_lock ();
3597                 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3598                 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3599                 if (item) {
3600                         offset = item->offset;
3601                         g_free (item);
3602                 } else {
3603                         offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3604                 }
3605                 /* This can be called during startup */
3606                 if (threads != NULL)
3607                         mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3608                 mono_threads_unlock ();
3609         }
3610         else
3611         {
3612                 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3613                 mono_contexts_lock ();
3614                 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3615                 mono_contexts_unlock ();
3616                 offset |= 0x80000000;   /* Set the high bit to indicate context static data */
3617         }
3618         return offset;
3619 }
3620
3621 gpointer
3622 mono_get_special_static_data (guint32 offset)
3623 {
3624         /* The high bit means either thread (0) or static (1) data. */
3625
3626         guint32 static_type = (offset & 0x80000000);
3627         int idx;
3628
3629         offset &= 0x7fffffff;
3630         idx = (offset >> 24) - 1;
3631
3632         if (static_type == 0) {
3633                 return get_thread_static_data (mono_thread_internal_current (), offset);
3634         } else {
3635                 /* Allocate static data block under demand, since we don't have a list
3636                 // of contexts
3637                 */
3638                 MonoAppContext *context = mono_context_get ();
3639                 if (!context->static_data || !context->static_data [idx]) {
3640                         mono_contexts_lock ();
3641                         mono_alloc_static_data (&(context->static_data), offset);
3642                         mono_contexts_unlock ();
3643                 }
3644                 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3645         }
3646 }
3647
3648 typedef struct {
3649         guint32 offset;
3650         guint32 size;
3651 } TlsOffsetSize;
3652
3653 static void
3654 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3655 {
3656         MonoInternalThread *thread = value;
3657         TlsOffsetSize *data = user;
3658         int idx = (data->offset >> 24) - 1;
3659         char *ptr;
3660
3661         if (!thread->static_data || !thread->static_data [idx])
3662                 return;
3663         ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3664         memset (ptr, 0, data->size);
3665 }
3666
3667 static void
3668 do_free_special (gpointer key, gpointer value, gpointer data)
3669 {
3670         MonoClassField *field = key;
3671         guint32 offset = GPOINTER_TO_UINT (value);
3672         guint32 static_type = (offset & 0x80000000);
3673         gint32 align;
3674         guint32 size;
3675         size = mono_type_size (field->type, &align);
3676         /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3677         if (static_type == 0) {
3678                 TlsOffsetSize data;
3679                 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3680                 data.offset = offset & 0x7fffffff;
3681                 data.size = size;
3682                 if (threads != NULL)
3683                         mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3684                 item->offset = offset;
3685                 item->size = size;
3686                 item->next = thread_static_info.freelist;
3687                 thread_static_info.freelist = item;
3688         } else {
3689                 /* FIXME: free context static data as well */
3690         }
3691 }
3692
3693 void
3694 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3695 {
3696         mono_threads_lock ();
3697         g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3698         mono_threads_unlock ();
3699 }
3700
3701 static MonoClassField *local_slots = NULL;
3702
3703 typedef struct {
3704         /* local tls data to get locals_slot from a thread */
3705         guint32 offset;
3706         int idx;
3707         /* index in the locals_slot array */
3708         int slot;
3709 } LocalSlotID;
3710
3711 static void
3712 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3713 {
3714         LocalSlotID *sid = user_data;
3715         MonoInternalThread *thread = (MonoInternalThread*)value;
3716         MonoArray *slots_array;
3717         /*
3718          * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3719          * it is for the right domain, so we need to check if it is allocated an initialized
3720          * for the current thread.
3721          */
3722         /*g_print ("handling thread %p\n", thread);*/
3723         if (!thread->static_data || !thread->static_data [sid->idx])
3724                 return;
3725         slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3726         if (!slots_array || sid->slot >= mono_array_length (slots_array))
3727                 return;
3728         mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3729 }
3730
3731 void
3732 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3733 {
3734         MonoDomain *domain;
3735         LocalSlotID sid;
3736         sid.slot = slot;
3737         if (thread_local) {
3738                 void *addr = NULL;
3739                 if (!local_slots) {
3740                         local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3741                         if (!local_slots) {
3742                                 g_warning ("local_slots field not found in Thread class");
3743                                 return;
3744                         }
3745                 }
3746                 domain = mono_domain_get ();
3747                 mono_domain_lock (domain);
3748                 if (domain->special_static_fields)
3749                         addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3750                 mono_domain_unlock (domain);
3751                 if (!addr)
3752                         return;
3753                 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3754                 sid.offset = GPOINTER_TO_UINT (addr);
3755                 sid.offset &= 0x7fffffff;
3756                 sid.idx = (sid.offset >> 24) - 1;
3757                 mono_threads_lock ();
3758                 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
3759                 mono_threads_unlock ();
3760         } else {
3761                 /* FIXME: clear the slot for MonoAppContexts, too */
3762         }
3763 }
3764
3765 #ifdef HOST_WIN32
3766 static void CALLBACK dummy_apc (ULONG_PTR param)
3767 {
3768 }
3769 #else
3770 static guint32 dummy_apc (gpointer param)
3771 {
3772         return 0;
3773 }
3774 #endif
3775
3776 /*
3777  * mono_thread_execute_interruption
3778  *
3779  * Performs the operation that the requested thread state requires (abort,
3780  * suspend or stop)
3781  */
3782 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
3783 {
3784         ensure_synch_cs_set (thread);
3785
3786         EnterCriticalSection (thread->synch_cs);
3787
3788         /* MonoThread::interruption_requested can only be changed with atomics */
3789         if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
3790                 /* this will consume pending APC calls */
3791                 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
3792                 InterlockedDecrement (&thread_interruption_requested);
3793 #ifndef HOST_WIN32
3794                 /* Clear the interrupted flag of the thread so it can wait again */
3795                 wapi_clear_interruption ();
3796 #endif
3797         }
3798
3799         if ((thread->state & ThreadState_AbortRequested) != 0) {
3800                 LeaveCriticalSection (thread->synch_cs);
3801                 if (thread->abort_exc == NULL) {
3802                         /*
3803                          * This might be racy, but it has to be called outside the lock
3804                          * since it calls managed code.
3805                          */
3806                         MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
3807                 }
3808                 return thread->abort_exc;
3809         }
3810         else if ((thread->state & ThreadState_SuspendRequested) != 0) {
3811                 thread->state &= ~ThreadState_SuspendRequested;
3812                 thread->state |= ThreadState_Suspended;
3813                 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3814                 if (thread->suspend_event == NULL) {
3815                         LeaveCriticalSection (thread->synch_cs);
3816                         return(NULL);
3817                 }
3818                 if (thread->suspended_event)
3819                         SetEvent (thread->suspended_event);
3820
3821                 LeaveCriticalSection (thread->synch_cs);
3822
3823                 if (shutting_down) {
3824                         /* After we left the lock, the runtime might shut down so everything becomes invalid */
3825                         for (;;)
3826                                 Sleep (1000);
3827                 }
3828
3829                 WaitForSingleObject (thread->suspend_event, INFINITE);
3830
3831                 EnterCriticalSection (thread->synch_cs);
3832
3833                 CloseHandle (thread->suspend_event);
3834                 thread->suspend_event = NULL;
3835                 thread->state &= ~ThreadState_Suspended;
3836
3837                 /* The thread that requested the resume will have replaced this event
3838                  * and will be waiting for it
3839                  */
3840                 SetEvent (thread->resume_event);
3841
3842                 LeaveCriticalSection (thread->synch_cs);
3843
3844                 return NULL;
3845         }
3846         else if ((thread->state & ThreadState_StopRequested) != 0) {
3847                 /* FIXME: do this through the JIT? */
3848
3849                 LeaveCriticalSection (thread->synch_cs);
3850
3851                 mono_thread_exit ();
3852                 return NULL;
3853         } else if (thread->thread_interrupt_requested) {
3854
3855                 thread->thread_interrupt_requested = FALSE;
3856                 LeaveCriticalSection (thread->synch_cs);
3857
3858                 return(mono_get_exception_thread_interrupted ());
3859         }
3860
3861         LeaveCriticalSection (thread->synch_cs);
3862
3863         return NULL;
3864 }
3865
3866 /*
3867  * mono_thread_request_interruption
3868  *
3869  * A signal handler can call this method to request the interruption of a
3870  * thread. The result of the interruption will depend on the current state of
3871  * the thread. If the result is an exception that needs to be throw, it is
3872  * provided as return value.
3873  */
3874 MonoException*
3875 mono_thread_request_interruption (gboolean running_managed)
3876 {
3877         MonoInternalThread *thread = mono_thread_internal_current ();
3878
3879         /* The thread may already be stopping */
3880         if (thread == NULL)
3881                 return NULL;
3882
3883 #ifdef HOST_WIN32
3884         if (thread->interrupt_on_stop &&
3885                 thread->state & ThreadState_StopRequested &&
3886                 thread->state & ThreadState_Background)
3887                 ExitThread (1);
3888 #endif
3889
3890         if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
3891                 return NULL;
3892
3893         if (!running_managed || is_running_protected_wrapper ()) {
3894                 /* Can't stop while in unmanaged code. Increase the global interruption
3895                    request count. When exiting the unmanaged method the count will be
3896                    checked and the thread will be interrupted. */
3897
3898                 InterlockedIncrement (&thread_interruption_requested);
3899
3900                 if (mono_thread_notify_pending_exc_fn && !running_managed)
3901                         /* The JIT will notify the thread about the interruption */
3902                         /* This shouldn't take any locks */
3903                         mono_thread_notify_pending_exc_fn ();
3904
3905                 /* this will awake the thread if it is in WaitForSingleObject
3906                    or similar */
3907                 /* Our implementation of this function ignores the func argument */
3908                 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
3909                 return NULL;
3910         }
3911         else {
3912                 return mono_thread_execute_interruption (thread);
3913         }
3914 }
3915
3916 gboolean mono_thread_interruption_requested ()
3917 {
3918         if (thread_interruption_requested) {
3919                 MonoInternalThread *thread = mono_thread_internal_current ();
3920                 /* The thread may already be stopping */
3921                 if (thread != NULL)
3922                         return (thread->interruption_requested);
3923         }
3924         return FALSE;
3925 }
3926
3927 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
3928 {
3929         MonoInternalThread *thread = mono_thread_internal_current ();
3930
3931         /* The thread may already be stopping */
3932         if (thread == NULL)
3933                 return;
3934
3935         mono_debugger_check_interruption ();
3936
3937         if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
3938                 MonoException* exc = mono_thread_execute_interruption (thread);
3939                 if (exc) mono_raise_exception (exc);
3940         }
3941 }
3942
3943 /*
3944  * Performs the interruption of the current thread, if one has been requested,
3945  * and the thread is not running a protected wrapper.
3946  */
3947 void mono_thread_interruption_checkpoint ()
3948 {
3949         mono_thread_interruption_checkpoint_request (FALSE);
3950 }
3951
3952 /*
3953  * Performs the interruption of the current thread, if one has been requested.
3954  */
3955 void mono_thread_force_interruption_checkpoint ()
3956 {
3957         mono_thread_interruption_checkpoint_request (TRUE);
3958 }
3959
3960 /*
3961  * mono_thread_get_and_clear_pending_exception:
3962  *
3963  *   Return any pending exceptions for the current thread and clear it as a side effect.
3964  */
3965 MonoException*
3966 mono_thread_get_and_clear_pending_exception (void)
3967 {
3968         MonoInternalThread *thread = mono_thread_internal_current ();
3969
3970         /* The thread may already be stopping */
3971         if (thread == NULL)
3972                 return NULL;
3973
3974         if (thread->interruption_requested && !is_running_protected_wrapper ()) {
3975                 return mono_thread_execute_interruption (thread);
3976         }
3977
3978         if (thread->pending_exception) {
3979                 MonoException *exc = thread->pending_exception;
3980
3981                 thread->pending_exception = NULL;
3982                 return exc;
3983         }
3984
3985         return NULL;
3986 }
3987
3988 /*
3989  * mono_set_pending_exception:
3990  *
3991  *   Set the pending exception of the current thread to EXC. On platforms which
3992  * support it, the exception will be thrown when execution returns to managed code.
3993  * On other platforms, this function is equivalent to mono_raise_exception ().
3994  * Internal calls which report exceptions using this function instead of
3995  * raise_exception () might be called by JITted code using a more efficient calling
3996  * convention.
3997  */
3998 void
3999 mono_set_pending_exception (MonoException *exc)
4000 {
4001         MonoInternalThread *thread = mono_thread_internal_current ();
4002
4003         /* The thread may already be stopping */
4004         if (thread == NULL)
4005                 return;
4006
4007         if (mono_thread_notify_pending_exc_fn) {
4008                 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4009
4010                 mono_thread_notify_pending_exc_fn ();
4011         } else {
4012                 /* No way to notify the JIT about the exception, have to throw it now */
4013                 mono_raise_exception (exc);
4014         }
4015 }
4016
4017 /**
4018  * mono_thread_interruption_request_flag:
4019  *
4020  * Returns the address of a flag that will be non-zero if an interruption has
4021  * been requested for a thread. The thread to interrupt may not be the current
4022  * thread, so an additional call to mono_thread_interruption_requested() or
4023  * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4024  * zero.
4025  */
4026 gint32* mono_thread_interruption_request_flag ()
4027 {
4028         return &thread_interruption_requested;
4029 }
4030
4031 void
4032 mono_thread_init_apartment_state (void)
4033 {
4034 #ifdef HOST_WIN32
4035         MonoInternalThread* thread = mono_thread_internal_current ();
4036
4037         /* Positive return value indicates success, either
4038          * S_OK if this is first CoInitialize call, or
4039          * S_FALSE if CoInitialize already called, but with same
4040          * threading model. A negative value indicates failure,
4041          * probably due to trying to change the threading model.
4042          */
4043         if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4044                         ? COINIT_APARTMENTTHREADED
4045                         : COINIT_MULTITHREADED) < 0) {
4046                 thread->apartment_state = ThreadApartmentState_Unknown;
4047         }
4048 #endif
4049 }
4050
4051 void
4052 mono_thread_cleanup_apartment_state (void)
4053 {
4054 #ifdef HOST_WIN32
4055         MonoInternalThread* thread = mono_thread_internal_current ();
4056
4057         if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4058                 CoUninitialize ();
4059         }
4060 #endif
4061 }
4062
4063 void
4064 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4065 {
4066         ensure_synch_cs_set (thread);
4067
4068         EnterCriticalSection (thread->synch_cs);
4069         thread->state |= state;
4070         LeaveCriticalSection (thread->synch_cs);
4071 }
4072
4073 void
4074 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4075 {
4076         ensure_synch_cs_set (thread);
4077
4078         EnterCriticalSection (thread->synch_cs);
4079         thread->state &= ~state;
4080         LeaveCriticalSection (thread->synch_cs);
4081 }
4082
4083 gboolean
4084 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4085 {
4086         gboolean ret = FALSE;
4087
4088         ensure_synch_cs_set (thread);
4089
4090         EnterCriticalSection (thread->synch_cs);
4091
4092         if ((thread->state & test) != 0) {
4093                 ret = TRUE;
4094         }
4095
4096         LeaveCriticalSection (thread->synch_cs);
4097
4098         return ret;
4099 }
4100
4101 static MonoClassField *execution_context_field;
4102
4103 static MonoObject**
4104 get_execution_context_addr (void)
4105 {
4106         MonoDomain *domain = mono_domain_get ();
4107         guint32 offset;
4108
4109         if (!execution_context_field) {
4110                 execution_context_field = mono_class_get_field_from_name (mono_defaults.thread_class,
4111                                 "_ec");
4112                 g_assert (execution_context_field);
4113         }
4114
4115         g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4116
4117         mono_domain_lock (domain);
4118         offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, execution_context_field));
4119         mono_domain_unlock (domain);
4120         g_assert (offset);
4121
4122         return (MonoObject**) mono_get_special_static_data (offset);
4123 }
4124
4125 MonoObject*
4126 mono_thread_get_execution_context (void)
4127 {
4128         return *get_execution_context_addr ();
4129 }
4130
4131 void
4132 mono_thread_set_execution_context (MonoObject *ec)
4133 {
4134         *get_execution_context_addr () = ec;
4135 }
4136
4137 static gboolean has_tls_get = FALSE;
4138
4139 void
4140 mono_runtime_set_has_tls_get (gboolean val)
4141 {
4142         has_tls_get = val;
4143 }
4144
4145 gboolean
4146 mono_runtime_has_tls_get (void)
4147 {
4148         return has_tls_get;
4149 }