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 #if defined(__OpenBSD__)
  20 #include <pthread.h>
  21 #include <pthread_np.h>
  22 #endif
  23
  24 #include <mono/metadata/object.h>
  25 #include <mono/metadata/domain-internals.h>
  26 #include <mono/metadata/profiler-private.h>
  27 #include <mono/metadata/threads.h>
  28 #include <mono/metadata/threadpool.h>
  29 #include <mono/metadata/threads-types.h>
  30 #include <mono/metadata/exception.h>
  31 #include <mono/metadata/environment.h>
  32 #include <mono/metadata/monitor.h>
  33 #include <mono/metadata/gc-internal.h>
  34 #include <mono/metadata/marshal.h>
  35 #include <mono/io-layer/io-layer.h>
  36 #ifndef HOST_WIN32
  37 #include <mono/io-layer/threads.h>
  38 #endif
  39 #include <mono/metadata/object-internals.h>
  40 #include <mono/metadata/mono-debug-debugger.h>
  41 #include <mono/utils/mono-compiler.h>
  42 #include <mono/utils/mono-mmap.h>
  43 #include <mono/utils/mono-membar.h>
  44 #include <mono/utils/mono-time.h>
  45
  46 #include <mono/metadata/gc-internal.h>
  47
  48 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
  49 #define THREAD_DEBUG(a)
  50 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
  51 #define THREAD_WAIT_DEBUG(a)
  52 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
  53 #define LIBGC_DEBUG(a)
  54
  55 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
  56 #define SPIN_LOCK(i) do { \
  57                                 if (SPIN_TRYLOCK (i)) \
  58                                         break; \
  59                         } while (1)
  60
  61 #define SPIN_UNLOCK(i) i = 0
  62
  63 /* Provide this for systems with glib < 2.6 */
  64 #ifndef G_GSIZE_FORMAT
  65 #   if GLIB_SIZEOF_LONG == 8
  66 #       define G_GSIZE_FORMAT "lu"
  67 #   else
  68 #       define G_GSIZE_FORMAT "u"
  69 #   endif
  70 #endif
  71
  72 struct StartInfo
  73 {
  74         guint32 (*func)(void *);
  75         MonoThread *obj;
  76         MonoObject *delegate;
  77         void *start_arg;
  78 };
  79
  80 typedef union {
  81         gint32 ival;
  82         gfloat fval;
  83 } IntFloatUnion;
  84
  85 typedef union {
  86         gint64 ival;
  87         gdouble fval;
  88 } LongDoubleUnion;
  89
  90 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
  91 struct _MonoThreadDomainTls {
  92         MonoThreadDomainTls *next;
  93         guint32 offset;
  94         guint32 size;
  95 };
  96
  97 typedef struct {
  98         int idx;
  99         int offset;
 100         MonoThreadDomainTls *freelist;
 101 } StaticDataInfo;
 102
 103 typedef struct {
 104         gpointer p;
 105         MonoHazardousFreeFunc free_func;
 106 } DelayedFreeItem;
 107
 108 /* Number of cached culture objects in the MonoThread->cached_culture_info array
 109  * (per-type): we use the first NUM entries for CultureInfo and the last for
 110  * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
 111  */
 112 #define NUM_CACHED_CULTURES 4
 113 #define CULTURES_START_IDX 0
 114 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
 115
 116 /* Controls access to the 'threads' hash table */
 117 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
 118 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
 119 static CRITICAL_SECTION threads_mutex;
 120
 121 /* Controls access to context static data */
 122 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
 123 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
 124 static CRITICAL_SECTION contexts_mutex;
 125
 126 /* Holds current status of static data heap */
 127 static StaticDataInfo thread_static_info;
 128 static StaticDataInfo context_static_info;
 129
 130 /* The hash of existing threads (key is thread ID, value is
 131  * MonoInternalThread*) that need joining before exit
 132  */
 133 static MonoGHashTable *threads=NULL;
 134
 135 /*
 136  * Threads which are starting up and they are not in the 'threads' hash yet.
 137  * When handle_store is called for a thread, it will be removed from this hash table.
 138  * Protected by mono_threads_lock ().
 139  */
 140 static MonoGHashTable *threads_starting_up = NULL;
 141
 142 /* Maps a MonoThread to its start argument */
 143 /* Protected by mono_threads_lock () */
 144 static MonoGHashTable *thread_start_args = NULL;
 145
 146 /* The TLS key that holds the MonoObject assigned to each thread */
 147 static guint32 current_object_key = -1;
 148
 149 #ifdef HAVE_KW_THREAD
 150 /* we need to use both the Tls* functions and __thread because
 151  * the gc needs to see all the threads
 152  */
 153 static __thread MonoInternalThread * tls_current_object MONO_TLS_FAST;
 154 #define SET_CURRENT_OBJECT(x) do { \
 155         tls_current_object = x; \
 156         TlsSetValue (current_object_key, x); \
 157 } while (FALSE)
 158 #define GET_CURRENT_OBJECT() tls_current_object
 159 #else
 160 #define SET_CURRENT_OBJECT(x) TlsSetValue (current_object_key, x)
 161 #define GET_CURRENT_OBJECT() (MonoThread*) TlsGetValue (current_object_key)
 162 #endif
 163
 164 /* function called at thread start */
 165 static MonoThreadStartCB mono_thread_start_cb = NULL;
 166
 167 /* function called at thread attach */
 168 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
 169
 170 /* function called at thread cleanup */
 171 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
 172
 173 /* function called to notify the runtime about a pending exception on the current thread */
 174 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
 175
 176 /* The default stack size for each thread */
 177 static guint32 default_stacksize = 0;
 178 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
 179
 180 static void thread_adjust_static_data (MonoInternalThread *thread);
 181 static void mono_free_static_data (gpointer* static_data, gboolean threadlocal);
 182 static void mono_init_static_data_info (StaticDataInfo *static_data);
 183 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
 184 static gboolean mono_thread_resume (MonoInternalThread* thread);
 185 static void mono_thread_start (MonoThread *thread);
 186 static void signal_thread_state_change (MonoInternalThread *thread);
 187
 188 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread);
 189
 190 /* Spin lock for InterlockedXXX 64 bit functions */
 191 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
 192 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
 193 static CRITICAL_SECTION interlocked_mutex;
 194
 195 /* global count of thread interruptions requested */
 196 static gint32 thread_interruption_requested = 0;
 197
 198 /* Event signaled when a thread changes its background mode */
 199 static HANDLE background_change_event;
 200
 201 /* The table for small ID assignment */
 202 static CRITICAL_SECTION small_id_mutex;
 203 static int small_id_table_size = 0;
 204 static int small_id_next = 0;
 205 static int highest_small_id = -1;
 206 static MonoInternalThread **small_id_table = NULL;
 207
 208 /* The hazard table */
 209 #if MONO_SMALL_CONFIG
 210 #define HAZARD_TABLE_MAX_SIZE   256
 211 #else
 212 #define HAZARD_TABLE_MAX_SIZE   16384 /* There cannot be more threads than this number. */
 213 #endif
 214 static volatile int hazard_table_size = 0;
 215 static MonoThreadHazardPointers * volatile hazard_table = NULL;
 216
 217 /* The table where we keep pointers to blocks to be freed but that
 218    have to wait because they're guarded by a hazard pointer. */
 219 static CRITICAL_SECTION delayed_free_table_mutex;
 220 static GArray *delayed_free_table = NULL;
 221
 222 static gboolean shutting_down = FALSE;
 223
 224 guint32
 225 mono_thread_get_tls_key (void)
 226 {
 227         return current_object_key;
 228 }
 229
 230 gint32
 231 mono_thread_get_tls_offset (void)
 232 {
 233         int offset;
 234         MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
 235         return offset;
 236 }
 237
 238 /* handle_store() and handle_remove() manage the array of threads that
 239  * still need to be waited for when the main thread exits.
 240  *
 241  * If handle_store() returns FALSE the thread must not be started
 242  * because Mono is shutting down.
 243  */
 244 static gboolean handle_store(MonoThread *thread)
 245 {
 246         mono_threads_lock ();
 247
 248         THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->tid));
 249
 250         if (threads_starting_up)
 251                 mono_g_hash_table_remove (threads_starting_up, thread);
 252
 253         if (shutting_down) {
 254                 mono_threads_unlock ();
 255                 return FALSE;
 256         }
 257
 258         if(threads==NULL) {
 259                 MONO_GC_REGISTER_ROOT (threads);
 260                 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
 261         }
 262
 263         /* We don't need to duplicate thread->handle, because it is
 264          * only closed when the thread object is finalized by the GC.
 265          */
 266         g_assert (thread->internal_thread);
 267         mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->internal_thread->tid),
 268                                  thread->internal_thread);
 269
 270         mono_threads_unlock ();
 271
 272         return TRUE;
 273 }
 274
 275 static gboolean handle_remove(MonoInternalThread *thread)
 276 {
 277         gboolean ret;
 278         gsize tid = thread->tid;
 279
 280         THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
 281
 282         mono_threads_lock ();
 283
 284         if (threads) {
 285                 /* We have to check whether the thread object for the
 286                  * tid is still the same in the table because the
 287                  * thread might have been destroyed and the tid reused
 288                  * in the meantime, in which case the tid would be in
 289                  * the table, but with another thread object.
 290                  */
 291                 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
 292                         mono_g_hash_table_remove (threads, (gpointer)tid);
 293                         ret = TRUE;
 294                 } else {
 295                         ret = FALSE;
 296                 }
 297         }
 298         else
 299                 ret = FALSE;
 300
 301         mono_threads_unlock ();
 302
 303         /* Don't close the handle here, wait for the object finalizer
 304          * to do it. Otherwise, the following race condition applies:
 305          *
 306          * 1) Thread exits (and handle_remove() closes the handle)
 307          *
 308          * 2) Some other handle is reassigned the same slot
 309          *
 310          * 3) Another thread tries to join the first thread, and
 311          * blocks waiting for the reassigned handle to be signalled
 312          * (which might never happen).  This is possible, because the
 313          * thread calling Join() still has a reference to the first
 314          * thread's object.
 315          */
 316         return ret;
 317 }
 318
 319 /*
 320  * Allocate a small thread id.
 321  *
 322  * FIXME: The biggest part of this function is very similar to
 323  * domain_id_alloc() in domain.c and should be merged.
 324  */
 325 static int
 326 small_id_alloc (MonoInternalThread *thread)
 327 {
 328         int id = -1, i;
 329
 330         EnterCriticalSection (&small_id_mutex);
 331
 332         if (!small_id_table) {
 333                 small_id_table_size = 2;
 334                 small_id_table = mono_gc_alloc_fixed (small_id_table_size * sizeof (MonoInternalThread*), NULL);
 335         }
 336         for (i = small_id_next; i < small_id_table_size; ++i) {
 337                 if (!small_id_table [i]) {
 338                         id = i;
 339                         break;
 340                 }
 341         }
 342         if (id == -1) {
 343                 for (i = 0; i < small_id_next; ++i) {
 344                         if (!small_id_table [i]) {
 345                                 id = i;
 346                                 break;
 347                         }
 348                 }
 349         }
 350         if (id == -1) {
 351                 MonoInternalThread **new_table;
 352                 int new_size = small_id_table_size * 2;
 353                 if (new_size >= (1 << 16))
 354                         g_assert_not_reached ();
 355                 id = small_id_table_size;
 356                 new_table = mono_gc_alloc_fixed (new_size * sizeof (MonoInternalThread*), NULL);
 357                 memcpy (new_table, small_id_table, small_id_table_size * sizeof (void*));
 358                 mono_gc_free_fixed (small_id_table);
 359                 small_id_table = new_table;
 360                 small_id_table_size = new_size;
 361         }
 362         thread->small_id = id;
 363         g_assert (small_id_table [id] == NULL);
 364         small_id_table [id] = thread;
 365         small_id_next++;
 366         if (small_id_next > small_id_table_size)
 367                 small_id_next = 0;
 368
 369         g_assert (id < HAZARD_TABLE_MAX_SIZE);
 370         if (id >= hazard_table_size) {
 371 #if MONO_SMALL_CONFIG
 372                 hazard_table = g_malloc0 (sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE);
 373                 hazard_table_size = HAZARD_TABLE_MAX_SIZE;
 374 #else
 375                 gpointer page_addr;
 376                 int pagesize = mono_pagesize ();
 377                 int num_pages = (hazard_table_size * sizeof (MonoThreadHazardPointers) + pagesize - 1) / pagesize;
 378
 379                 if (hazard_table == NULL) {
 380                         hazard_table = mono_valloc (NULL,
 381                                 sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE,
 382                                 MONO_MMAP_NONE);
 383                 }
 384
 385                 g_assert (hazard_table != NULL);
 386                 page_addr = (guint8*)hazard_table + num_pages * pagesize;
 387
 388                 mono_mprotect (page_addr, pagesize, MONO_MMAP_READ | MONO_MMAP_WRITE);
 389
 390                 ++num_pages;
 391                 hazard_table_size = num_pages * pagesize / sizeof (MonoThreadHazardPointers);
 392
 393 #endif
 394                 g_assert (id < hazard_table_size);
 395                 hazard_table [id].hazard_pointers [0] = NULL;
 396                 hazard_table [id].hazard_pointers [1] = NULL;
 397         }
 398
 399         if (id > highest_small_id) {
 400                 highest_small_id = id;
 401                 mono_memory_write_barrier ();
 402         }
 403
 404         LeaveCriticalSection (&small_id_mutex);
 405
 406         return id;
 407 }
 408
 409 static void
 410 small_id_free (int id)
 411 {
 412         g_assert (id >= 0 && id < small_id_table_size);
 413         g_assert (small_id_table [id] != NULL);
 414
 415         small_id_table [id] = NULL;
 416 }
 417
 418 static gboolean
 419 is_pointer_hazardous (gpointer p)
 420 {
 421         int i;
 422         int highest = highest_small_id;
 423
 424         g_assert (highest < hazard_table_size);
 425
 426         for (i = 0; i <= highest; ++i) {
 427                 if (hazard_table [i].hazard_pointers [0] == p
 428                                 || hazard_table [i].hazard_pointers [1] == p)
 429                         return TRUE;
 430         }
 431
 432         return FALSE;
 433 }
 434
 435 MonoThreadHazardPointers*
 436 mono_hazard_pointer_get (void)
 437 {
 438         MonoInternalThread *current_thread = mono_thread_internal_current ();
 439
 440         if (!(current_thread && current_thread->small_id >= 0)) {
 441                 static MonoThreadHazardPointers emerg_hazard_table;
 442                 g_warning ("Thread %p may have been prematurely finalized", current_thread);
 443                 return &emerg_hazard_table;
 444         }
 445
 446         return &hazard_table [current_thread->small_id];
 447 }
 448
 449 static void
 450 try_free_delayed_free_item (int index)
 451 {
 452         if (delayed_free_table->len > index) {
 453                 DelayedFreeItem item = { NULL, NULL };
 454
 455                 EnterCriticalSection (&delayed_free_table_mutex);
 456                 /* We have to check the length again because another
 457                    thread might have freed an item before we acquired
 458                    the lock. */
 459                 if (delayed_free_table->len > index) {
 460                         item = g_array_index (delayed_free_table, DelayedFreeItem, index);
 461
 462                         if (!is_pointer_hazardous (item.p))
 463                                 g_array_remove_index_fast (delayed_free_table, index);
 464                         else
 465                                 item.p = NULL;
 466                 }
 467                 LeaveCriticalSection (&delayed_free_table_mutex);
 468
 469                 if (item.p != NULL)
 470                         item.free_func (item.p);
 471         }
 472 }
 473
 474 void
 475 mono_thread_hazardous_free_or_queue (gpointer p, MonoHazardousFreeFunc free_func)
 476 {
 477         int i;
 478
 479         /* First try to free a few entries in the delayed free
 480            table. */
 481         for (i = 2; i >= 0; --i)
 482                 try_free_delayed_free_item (i);
 483
 484         /* Now see if the pointer we're freeing is hazardous.  If it
 485            isn't, free it.  Otherwise put it in the delay list. */
 486         if (is_pointer_hazardous (p)) {
 487                 DelayedFreeItem item = { p, free_func };
 488
 489                 ++mono_stats.hazardous_pointer_count;
 490
 491                 EnterCriticalSection (&delayed_free_table_mutex);
 492                 g_array_append_val (delayed_free_table, item);
 493                 LeaveCriticalSection (&delayed_free_table_mutex);
 494         } else
 495                 free_func (p);
 496 }
 497
 498 void
 499 mono_thread_hazardous_try_free_all (void)
 500 {
 501         int len;
 502         int i;
 503
 504         if (!delayed_free_table)
 505                 return;
 506
 507         len = delayed_free_table->len;
 508
 509         for (i = len - 1; i >= 0; --i)
 510                 try_free_delayed_free_item (i);
 511 }
 512
 513 static void ensure_synch_cs_set (MonoInternalThread *thread)
 514 {
 515         CRITICAL_SECTION *synch_cs;
 516
 517         if (thread->synch_cs != NULL) {
 518                 return;
 519         }
 520
 521         synch_cs = g_new0 (CRITICAL_SECTION, 1);
 522         InitializeCriticalSection (synch_cs);
 523
 524         if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
 525                                                synch_cs, NULL) != NULL) {
 526                 /* Another thread must have installed this CS */
 527                 DeleteCriticalSection (synch_cs);
 528                 g_free (synch_cs);
 529         }
 530 }
 531
 532 /*
 533  * NOTE: this function can be called also for threads different from the current one:
 534  * make sure no code called from it will ever assume it is run on the thread that is
 535  * getting cleaned up.
 536  */
 537 static void thread_cleanup (MonoInternalThread *thread)
 538 {
 539         g_assert (thread != NULL);
 540
 541         if (thread->abort_state_handle) {
 542                 mono_gchandle_free (thread->abort_state_handle);
 543                 thread->abort_state_handle = 0;
 544         }
 545         thread->abort_exc = NULL;
 546         thread->current_appcontext = NULL;
 547
 548         /*
 549          * This is necessary because otherwise we might have
 550          * cross-domain references which will not get cleaned up when
 551          * the target domain is unloaded.
 552          */
 553         if (thread->cached_culture_info) {
 554                 int i;
 555                 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
 556                         mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
 557         }
 558
 559         /* if the thread is not in the hash it has been removed already */
 560         if (!handle_remove (thread))
 561                 return;
 562         mono_release_type_locks (thread);
 563
 564         EnterCriticalSection (thread->synch_cs);
 565
 566         thread->state |= ThreadState_Stopped;
 567         thread->state &= ~ThreadState_Background;
 568
 569         LeaveCriticalSection (thread->synch_cs);
 570
 571         mono_profiler_thread_end (thread->tid);
 572
 573         if (thread == mono_thread_internal_current ())
 574                 mono_thread_pop_appdomain_ref ();
 575
 576         thread->cached_culture_info = NULL;
 577
 578         mono_free_static_data (thread->static_data, TRUE);
 579         thread->static_data = NULL;
 580
 581         /*
 582          * FIXME: The check for shutting_down here is a kludge and
 583          * should be removed.  The reason we need it here is because
 584          * mono_thread_manage() does not wait for finalizer threads,
 585          * so we might still be at this point in a finalizer thread
 586          * after the main thread has cleared the root domain, so
 587          * thread could have been zeroed out.
 588          */
 589         if (mono_thread_cleanup_fn && !shutting_down)
 590                 mono_thread_cleanup_fn (thread->root_domain_thread);
 591
 592         small_id_free (thread->small_id);
 593         thread->small_id = -2;
 594 }
 595
 596 static gpointer
 597 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
 598 {
 599         int idx;
 600         g_assert ((offset & 0x80000000) == 0);
 601         offset &= 0x7fffffff;
 602         idx = (offset >> 24) - 1;
 603         return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
 604 }
 605
 606 static MonoThread**
 607 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
 608 {
 609         static MonoClassField *current_thread_field = NULL;
 610
 611         guint32 offset;
 612
 613         if (!current_thread_field) {
 614                 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
 615                 g_assert (current_thread_field);
 616         }
 617
 618         mono_class_vtable (domain, mono_defaults.thread_class);
 619         mono_domain_lock (domain);
 620         offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
 621         mono_domain_unlock (domain);
 622         g_assert (offset);
 623
 624         return get_thread_static_data (thread, offset);
 625 }
 626
 627 static void
 628 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
 629 {
 630         MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
 631
 632         g_assert (current->obj.vtable->domain == domain);
 633
 634         g_assert (!*current_thread_ptr);
 635         *current_thread_ptr = current;
 636 }
 637
 638 static MonoThread*
 639 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
 640 {
 641         MonoThread *thread = (MonoThread*) mono_object_new (domain, mono_defaults.thread_class);
 642         MONO_OBJECT_SETREF (thread, internal_thread, internal);
 643         return thread;
 644 }
 645
 646 static void
 647 init_root_domain_thread (MonoInternalThread *thread, MonoThread *candidate)
 648 {
 649         MonoDomain *domain = mono_get_root_domain ();
 650
 651         if (!candidate || candidate->obj.vtable->domain != domain)
 652                 candidate = new_thread_with_internal (domain, thread);
 653         set_current_thread_for_domain (domain, thread, candidate);
 654         g_assert (!thread->root_domain_thread);
 655         MONO_OBJECT_SETREF (thread, root_domain_thread, candidate);
 656 }
 657
 658 static guint32 WINAPI start_wrapper(void *data)
 659 {
 660         struct StartInfo *start_info=(struct StartInfo *)data;
 661         guint32 (*start_func)(void *);
 662         void *start_arg;
 663         gsize tid;
 664         MonoThread *thread=start_info->obj;
 665         MonoInternalThread *internal = thread->internal_thread;
 666         MonoObject *start_delegate = start_info->delegate;
 667
 668         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
 669
 670         /* We can be sure start_info->obj->tid and
 671          * start_info->obj->handle have been set, because the thread
 672          * was created suspended, and these values were set before the
 673          * thread resumed
 674          */
 675
 676         tid=internal->tid;
 677
 678         SET_CURRENT_OBJECT (internal);
 679
 680         mono_monitor_init_tls ();
 681
 682         /* Every thread references the appdomain which created it */
 683         mono_thread_push_appdomain_ref (thread->obj.vtable->domain);
 684
 685         if (!mono_domain_set (thread->obj.vtable->domain, FALSE)) {
 686                 /* No point in raising an appdomain_unloaded exception here */
 687                 /* FIXME: Cleanup here */
 688                 mono_thread_pop_appdomain_ref ();
 689                 return 0;
 690         }
 691
 692         start_func = start_info->func;
 693         start_arg = start_info->start_arg;
 694
 695         /* We have to do this here because mono_thread_new_init()
 696            requires that root_domain_thread is set up. */
 697         thread_adjust_static_data (internal);
 698         init_root_domain_thread (internal, thread);
 699
 700         /* This MUST be called before any managed code can be
 701          * executed, as it calls the callback function that (for the
 702          * jit) sets the lmf marker.
 703          */
 704         mono_thread_new_init (tid, &tid, start_func);
 705         internal->stack_ptr = &tid;
 706
 707         LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
 708
 709         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
 710
 711         /* On 2.0 profile (and higher), set explicitly since state might have been
 712            Unknown */
 713         if (internal->apartment_state == ThreadApartmentState_Unknown)
 714                 internal->apartment_state = ThreadApartmentState_MTA;
 715
 716         mono_thread_init_apartment_state ();
 717
 718         if(internal->start_notify!=NULL) {
 719                 /* Let the thread that called Start() know we're
 720                  * ready
 721                  */
 722                 ReleaseSemaphore (internal->start_notify, 1, NULL);
 723         }
 724
 725         mono_threads_lock ();
 726         mono_g_hash_table_remove (thread_start_args, thread);
 727         mono_threads_unlock ();
 728
 729         g_free (start_info);
 730 #ifdef DEBUG
 731         g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
 732                    thread->tid);
 733 #endif
 734
 735         mono_thread_set_execution_context (thread->ec_to_set);
 736         thread->ec_to_set = NULL;
 737
 738         /*
 739          * Call this after calling start_notify, since the profiler callback might want
 740          * to lock the thread, and the lock is held by thread_start () which waits for
 741          * start_notify.
 742          */
 743         mono_profiler_thread_start (tid);
 744
 745         /* start_func is set only for unmanaged start functions */
 746         if (start_func) {
 747                 start_func (start_arg);
 748         } else {
 749                 void *args [1];
 750                 g_assert (start_delegate != NULL);
 751                 args [0] = start_arg;
 752                 /* we may want to handle the exception here. See comment below on unhandled exceptions */
 753                 mono_runtime_delegate_invoke (start_delegate, args, NULL);
 754         }
 755
 756         /* If the thread calls ExitThread at all, this remaining code
 757          * will not be executed, but the main thread will eventually
 758          * call thread_cleanup() on this thread's behalf.
 759          */
 760
 761         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
 762
 763         thread_cleanup (internal);
 764
 765         /* Do any cleanup needed for apartment state. This
 766          * cannot be done in thread_cleanup since thread_cleanup could be
 767          * called for a thread other than the current thread.
 768          * mono_thread_cleanup_apartment_state cleans up apartment
 769          * for the current thead */
 770         mono_thread_cleanup_apartment_state ();
 771
 772         /* Remove the reference to the thread object in the TLS data,
 773          * so the thread object can be finalized.  This won't be
 774          * reached if the thread threw an uncaught exception, so those
 775          * thread handles will stay referenced :-( (This is due to
 776          * missing support for scanning thread-specific data in the
 777          * Boehm GC - the io-layer keeps a GC-visible hash of pointers
 778          * to TLS data.)
 779          */
 780         SET_CURRENT_OBJECT (NULL);
 781         mono_domain_unset ();
 782
 783         return(0);
 784 }
 785
 786 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
 787 {
 788         if (mono_thread_start_cb) {
 789                 mono_thread_start_cb (tid, stack_start, func);
 790         }
 791 }
 792
 793 void mono_threads_set_default_stacksize (guint32 stacksize)
 794 {
 795         default_stacksize = stacksize;
 796 }
 797
 798 guint32 mono_threads_get_default_stacksize (void)
 799 {
 800         return default_stacksize;
 801 }
 802
 803 /*
 804  * mono_create_thread:
 805  *
 806  *   This is a wrapper around CreateThread which handles differences in the type of
 807  * the the 'tid' argument.
 808  */
 809 gpointer mono_create_thread (WapiSecurityAttributes *security,
 810                                                          guint32 stacksize, WapiThreadStart start,
 811                                                          gpointer param, guint32 create, gsize *tid)
 812 {
 813         gpointer res;
 814
 815 #ifdef HOST_WIN32
 816         DWORD real_tid;
 817
 818         res = CreateThread (security, stacksize, start, param, create, &real_tid);
 819         if (tid)
 820                 *tid = real_tid;
 821 #else
 822         res = CreateThread (security, stacksize, start, param, create, tid);
 823 #endif
 824
 825         return res;
 826 }
 827
 828 /*
 829  * The thread start argument may be an object reference, and there is
 830  * no ref to keep it alive when the new thread is started but not yet
 831  * registered with the collector. So we store it in a GC tracked hash
 832  * table.
 833  *
 834  * LOCKING: Assumes the threads lock is held.
 835  */
 836 static void
 837 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
 838 {
 839         if (thread_start_args == NULL) {
 840                 MONO_GC_REGISTER_ROOT (thread_start_args);
 841                 thread_start_args = mono_g_hash_table_new (NULL, NULL);
 842         }
 843         mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
 844 }
 845
 846 MonoInternalThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread)
 847 {
 848         MonoThread *thread;
 849         MonoInternalThread *internal;
 850         HANDLE thread_handle;
 851         struct StartInfo *start_info;
 852         gsize tid;
 853
 854         thread=(MonoThread *)mono_object_new (domain,
 855                                               mono_defaults.thread_class);
 856         internal = (MonoInternalThread*)mono_object_new (mono_get_root_domain (),
 857                         mono_defaults.internal_thread_class);
 858         MONO_OBJECT_SETREF (thread, internal_thread, internal);
 859
 860         start_info=g_new0 (struct StartInfo, 1);
 861         start_info->func = func;
 862         start_info->obj = thread;
 863         start_info->start_arg = arg;
 864
 865         mono_threads_lock ();
 866         if (shutting_down) {
 867                 mono_threads_unlock ();
 868                 g_free (start_info);
 869                 return NULL;
 870         }
 871         if (threads_starting_up == NULL) {
 872                 MONO_GC_REGISTER_ROOT (threads_starting_up);
 873                 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
 874         }
 875
 876         register_thread_start_argument (thread, start_info);
 877         mono_g_hash_table_insert (threads_starting_up, thread, thread);
 878         mono_threads_unlock ();
 879
 880         /* Create suspended, so we can do some housekeeping before the thread
 881          * starts
 882          */
 883         thread_handle = mono_create_thread (NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
 884                                      CREATE_SUSPENDED, &tid);
 885         THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
 886         if (thread_handle == NULL) {
 887                 /* The thread couldn't be created, so throw an exception */
 888                 mono_threads_lock ();
 889                 mono_g_hash_table_remove (threads_starting_up, thread);
 890                 mono_threads_unlock ();
 891                 g_free (start_info);
 892                 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
 893                 return NULL;
 894         }
 895
 896         internal->handle=thread_handle;
 897         internal->tid=tid;
 898         internal->apartment_state=ThreadApartmentState_Unknown;
 899         small_id_alloc (internal);
 900
 901         internal->synch_cs = g_new0 (CRITICAL_SECTION, 1);
 902         InitializeCriticalSection (internal->synch_cs);
 903
 904         internal->threadpool_thread = threadpool_thread;
 905         if (threadpool_thread)
 906                 mono_thread_set_state (internal, ThreadState_Background);
 907
 908         if (handle_store (thread))
 909                 ResumeThread (thread_handle);
 910
 911         return internal;
 912 }
 913
 914 void
 915 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
 916 {
 917         mono_thread_create_internal (domain, func, arg, FALSE);
 918 }
 919
 920 /*
 921  * mono_thread_get_stack_bounds:
 922  *
 923  *   Return the address and size of the current threads stack. Return NULL as the
 924  * stack address if the stack address cannot be determined.
 925  */
 926 void
 927 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
 928 {
 929 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
 930         *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
 931         *stsize = pthread_get_stacksize_np (pthread_self ());
 932         *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
 933         return;
 934         /* FIXME: simplify the mess below */
 935 #elif !defined(HOST_WIN32)
 936         pthread_attr_t attr;
 937         guint8 *current = (guint8*)&attr;
 938
 939         pthread_attr_init (&attr);
 940 #  ifdef HAVE_PTHREAD_GETATTR_NP
 941         pthread_getattr_np (pthread_self(), &attr);
 942 #  else
 943 #    ifdef HAVE_PTHREAD_ATTR_GET_NP
 944         pthread_attr_get_np (pthread_self(), &attr);
 945 #    elif defined(sun)
 946         *staddr = NULL;
 947         pthread_attr_getstacksize (&attr, &stsize);
 948 #    elif defined(__OpenBSD__)
 949         stack_t ss;
 950         int rslt;
 951
 952         rslt = pthread_stackseg_np(pthread_self(), &ss);
 953         g_assert (rslt == 0);
 954
 955         *staddr = (guint8*)((size_t)ss.ss_sp - ss.ss_size);
 956         *stsize = ss.ss_size;
 957 #    else
 958         *staddr = NULL;
 959         *stsize = 0;
 960         return;
 961 #    endif
 962 #  endif
 963
 964 #  if !defined(sun)
 965 #    if !defined(__OpenBSD__)
 966         pthread_attr_getstack (&attr, (void**)staddr, stsize);
 967 #    endif
 968         if (*staddr)
 969                 g_assert ((current > *staddr) && (current < *staddr + *stsize));
 970 #  endif
 971
 972         pthread_attr_destroy (&attr);
 973 #endif
 974
 975         /* When running under emacs, sometimes staddr is not aligned to a page size */
 976         *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
 977 }
 978
 979 MonoThread *
 980 mono_thread_attach (MonoDomain *domain)
 981 {
 982         MonoInternalThread *thread;
 983         MonoThread *current_thread;
 984         HANDLE thread_handle;
 985         gsize tid;
 986
 987         if ((thread = mono_thread_internal_current ())) {
 988                 if (domain != mono_domain_get ())
 989                         mono_domain_set (domain, TRUE);
 990                 /* Already attached */
 991                 return mono_thread_current ();
 992         }
 993
 994         if (!mono_gc_register_thread (&domain)) {
 995                 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 ());
 996         }
 997
 998         thread = (MonoInternalThread *)mono_object_new (domain, mono_defaults.internal_thread_class);
 999
1000         thread_handle = GetCurrentThread ();
1001         g_assert (thread_handle);
1002
1003         tid=GetCurrentThreadId ();
1004
1005         /*
1006          * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
1007          * refer to the thread from other threads for things like aborting.
1008          */
1009         DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
1010                                          THREAD_ALL_ACCESS, TRUE, 0);
1011
1012         thread->handle=thread_handle;
1013         thread->tid=tid;
1014         thread->apartment_state=ThreadApartmentState_Unknown;
1015         small_id_alloc (thread);
1016         thread->stack_ptr = &tid;
1017
1018         thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
1019         InitializeCriticalSection (thread->synch_cs);
1020
1021         THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
1022
1023         current_thread = new_thread_with_internal (domain, thread);
1024
1025         if (!handle_store (current_thread)) {
1026                 /* Mono is shutting down, so just wait for the end */
1027                 for (;;)
1028                         Sleep (10000);
1029         }
1030
1031         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
1032
1033         SET_CURRENT_OBJECT (thread);
1034         mono_domain_set (domain, TRUE);
1035
1036         mono_monitor_init_tls ();
1037
1038         thread_adjust_static_data (thread);
1039
1040         init_root_domain_thread (thread, current_thread);
1041         if (domain != mono_get_root_domain ())
1042                 set_current_thread_for_domain (domain, thread, current_thread);
1043
1044
1045         if (mono_thread_attach_cb) {
1046                 guint8 *staddr;
1047                 size_t stsize;
1048
1049                 mono_thread_get_stack_bounds (&staddr, &stsize);
1050
1051                 if (staddr == NULL)
1052                         mono_thread_attach_cb (tid, &tid);
1053                 else
1054                         mono_thread_attach_cb (tid, staddr + stsize);
1055         }
1056
1057         // FIXME: Need a separate callback
1058         mono_profiler_thread_start (tid);
1059
1060         return current_thread;
1061 }
1062
1063 void
1064 mono_thread_detach (MonoThread *thread)
1065 {
1066         g_return_if_fail (thread != NULL);
1067
1068         THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1069
1070         thread_cleanup (thread->internal_thread);
1071
1072         SET_CURRENT_OBJECT (NULL);
1073         mono_domain_unset ();
1074
1075         /* Don't need to CloseHandle this thread, even though we took a
1076          * reference in mono_thread_attach (), because the GC will do it
1077          * when the Thread object is finalised.
1078          */
1079 }
1080
1081 void
1082 mono_thread_exit ()
1083 {
1084         MonoInternalThread *thread = mono_thread_internal_current ();
1085
1086         THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1087
1088         thread_cleanup (thread);
1089         SET_CURRENT_OBJECT (NULL);
1090         mono_domain_unset ();
1091
1092         /* we could add a callback here for embedders to use. */
1093         if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1094                 exit (mono_environment_exitcode_get ());
1095         ExitThread (-1);
1096 }
1097
1098 void
1099 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this)
1100 {
1101         MonoInternalThread *internal = (MonoInternalThread*)mono_object_new (mono_get_root_domain (), mono_defaults.internal_thread_class);
1102         internal->state = ThreadState_Unstarted;
1103         internal->apartment_state = ThreadApartmentState_Unknown;
1104
1105         InterlockedCompareExchangePointer ((gpointer)&this->internal_thread, internal, NULL);
1106 }
1107
1108 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
1109                                                          MonoObject *start)
1110 {
1111         guint32 (*start_func)(void *);
1112         struct StartInfo *start_info;
1113         HANDLE thread;
1114         gsize tid;
1115         MonoInternalThread *internal;
1116
1117         THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1118
1119         if (!this->internal_thread)
1120                 ves_icall_System_Threading_Thread_ConstructInternalThread (this);
1121         internal = this->internal_thread;
1122
1123         ensure_synch_cs_set (internal);
1124
1125         EnterCriticalSection (internal->synch_cs);
1126
1127         if ((internal->state & ThreadState_Unstarted) == 0) {
1128                 LeaveCriticalSection (internal->synch_cs);
1129                 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1130                 return NULL;
1131         }
1132
1133         internal->small_id = -1;
1134
1135         if ((internal->state & ThreadState_Aborted) != 0) {
1136                 LeaveCriticalSection (internal->synch_cs);
1137                 return this;
1138         }
1139         start_func = NULL;
1140         {
1141                 /* This is freed in start_wrapper */
1142                 start_info = g_new0 (struct StartInfo, 1);
1143                 start_info->func = start_func;
1144                 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1145                 start_info->delegate = start;
1146                 start_info->obj = this;
1147                 g_assert (this->obj.vtable->domain == mono_domain_get ());
1148
1149                 internal->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1150                 if (internal->start_notify==NULL) {
1151                         LeaveCriticalSection (internal->synch_cs);
1152                         g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1153                         g_free (start_info);
1154                         return(NULL);
1155                 }
1156
1157                 mono_threads_lock ();
1158                 register_thread_start_argument (this, start_info);
1159                 if (threads_starting_up == NULL) {
1160                         MONO_GC_REGISTER_ROOT (threads_starting_up);
1161                         threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC);
1162                 }
1163                 mono_g_hash_table_insert (threads_starting_up, this, this);
1164                 mono_threads_unlock ();
1165
1166                 thread=mono_create_thread(NULL, default_stacksize_for_thread (internal), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1167                                     CREATE_SUSPENDED, &tid);
1168                 if(thread==NULL) {
1169                         LeaveCriticalSection (internal->synch_cs);
1170                         mono_threads_lock ();
1171                         mono_g_hash_table_remove (threads_starting_up, this);
1172                         mono_threads_unlock ();
1173                         g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1174                         return(NULL);
1175                 }
1176
1177                 internal->handle=thread;
1178                 internal->tid=tid;
1179                 small_id_alloc (internal);
1180
1181                 /* Don't call handle_store() here, delay it to Start.
1182                  * We can't join a thread (trying to will just block
1183                  * forever) until it actually starts running, so don't
1184                  * store the handle till then.
1185                  */
1186
1187                 mono_thread_start (this);
1188
1189                 internal->state &= ~ThreadState_Unstarted;
1190
1191                 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1192
1193                 LeaveCriticalSection (internal->synch_cs);
1194                 return(thread);
1195         }
1196 }
1197
1198 void ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this, HANDLE thread)
1199 {
1200         MONO_ARCH_SAVE_REGS;
1201
1202         THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1203
1204         if (thread)
1205                 CloseHandle (thread);
1206
1207         if (this->synch_cs) {
1208                 DeleteCriticalSection (this->synch_cs);
1209                 g_free (this->synch_cs);
1210                 this->synch_cs = NULL;
1211         }
1212
1213         g_free (this->name);
1214 }
1215
1216 static void mono_thread_start (MonoThread *thread)
1217 {
1218         MonoInternalThread *internal = thread->internal_thread;
1219
1220         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1221
1222         /* Only store the handle when the thread is about to be
1223          * launched, to avoid the main thread deadlocking while trying
1224          * to clean up a thread that will never be signalled.
1225          */
1226         if (!handle_store (thread))
1227                 return;
1228
1229         ResumeThread (internal->handle);
1230
1231         if(internal->start_notify!=NULL) {
1232                 /* Wait for the thread to set up its TLS data etc, so
1233                  * theres no potential race condition if someone tries
1234                  * to look up the data believing the thread has
1235                  * started
1236                  */
1237
1238                 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1239
1240                 WaitForSingleObjectEx (internal->start_notify, INFINITE, FALSE);
1241                 CloseHandle (internal->start_notify);
1242                 internal->start_notify = NULL;
1243         }
1244
1245         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1246 }
1247
1248 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1249 {
1250         guint32 res;
1251         MonoInternalThread *thread = mono_thread_internal_current ();
1252
1253         THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1254
1255         mono_thread_current_check_pending_interrupt ();
1256
1257         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1258
1259         res = SleepEx(ms,TRUE);
1260
1261         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1262
1263         if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1264                 MonoException* exc = mono_thread_execute_interruption (thread);
1265                 if (exc) mono_raise_exception (exc);
1266         }
1267 }
1268
1269 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1270 {
1271 }
1272
1273 gint32
1274 ves_icall_System_Threading_Thread_GetDomainID (void)
1275 {
1276         MONO_ARCH_SAVE_REGS;
1277
1278         return mono_domain_get()->domain_id;
1279 }
1280
1281 gboolean
1282 ves_icall_System_Threading_Thread_Yield (void)
1283 {
1284 #ifdef HOST_WIN32
1285         return SwitchToThread ();
1286 #else
1287         return sched_yield () == 0;
1288 #endif
1289 }
1290
1291 /*
1292  * mono_thread_get_name:
1293  *
1294  *   Return the name of the thread. NAME_LEN is set to the length of the name.
1295  * Return NULL if the thread has no name. The returned memory is owned by the
1296  * caller.
1297  */
1298 gunichar2*
1299 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1300 {
1301         gunichar2 *res;
1302
1303         ensure_synch_cs_set (this_obj);
1304
1305         EnterCriticalSection (this_obj->synch_cs);
1306
1307         if (!this_obj->name) {
1308                 *name_len = 0;
1309                 res = NULL;
1310         } else {
1311                 *name_len = this_obj->name_len;
1312                 res = g_new (gunichar2, this_obj->name_len);
1313                 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1314         }
1315
1316         LeaveCriticalSection (this_obj->synch_cs);
1317
1318         return res;
1319 }
1320
1321 MonoString*
1322 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1323 {
1324         MonoString* str;
1325
1326         ensure_synch_cs_set (this_obj);
1327
1328         EnterCriticalSection (this_obj->synch_cs);
1329
1330         if (!this_obj->name)
1331                 str = NULL;
1332         else
1333                 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1334
1335         LeaveCriticalSection (this_obj->synch_cs);
1336
1337         return str;
1338 }
1339
1340 void
1341 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1342 {
1343         ensure_synch_cs_set (this_obj);
1344
1345         EnterCriticalSection (this_obj->synch_cs);
1346
1347         if (this_obj->name) {
1348                 LeaveCriticalSection (this_obj->synch_cs);
1349
1350                 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1351                 return;
1352         }
1353         if (name) {
1354                 this_obj->name = g_new (gunichar2, mono_string_length (name));
1355                 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1356                 this_obj->name_len = mono_string_length (name);
1357         }
1358         else
1359                 this_obj->name = NULL;
1360
1361         LeaveCriticalSection (this_obj->synch_cs);
1362 }
1363
1364 static MonoObject*
1365 lookup_cached_culture (MonoInternalThread *this, MonoDomain *domain, int start_idx)
1366 {
1367         MonoObject *res;
1368         int i;
1369
1370         if (this->cached_culture_info) {
1371                 domain = mono_domain_get ();
1372                 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1373                         res = mono_array_get (this->cached_culture_info, MonoObject*, i);
1374                         if (res && res->vtable->domain == domain)
1375                                 return res;
1376                 }
1377         }
1378
1379         return NULL;
1380 }
1381
1382 /* If the array is already in the requested domain, we just return it,
1383    otherwise we return a copy in that domain. */
1384 static MonoArray*
1385 byte_array_to_domain (MonoArray *arr, MonoDomain *domain)
1386 {
1387         MonoArray *copy;
1388
1389         if (!arr)
1390                 return NULL;
1391
1392         if (mono_object_domain (arr) == domain)
1393                 return arr;
1394
1395         copy = mono_array_new (domain, mono_defaults.byte_class, arr->max_length);
1396         memcpy (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1397         return copy;
1398 }
1399
1400 MonoArray*
1401 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1402 {
1403         return byte_array_to_domain (arr, mono_get_root_domain ());
1404 }
1405
1406 MonoArray*
1407 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1408 {
1409         return byte_array_to_domain (arr, mono_domain_get ());
1410 }
1411
1412 MonoObject*
1413 ves_icall_System_Threading_Thread_GetCachedCurrentCulture (MonoInternalThread *this)
1414 {
1415         return lookup_cached_culture (this, mono_domain_get (), CULTURES_START_IDX);
1416 }
1417
1418 static void
1419 cache_culture (MonoInternalThread *this, MonoObject *culture, int start_idx)
1420 {
1421         int i;
1422         MonoDomain *domain = mono_domain_get ();
1423         MonoObject *obj;
1424         int free_slot = -1;
1425         int same_domain_slot = -1;
1426
1427         ensure_synch_cs_set (this);
1428
1429         EnterCriticalSection (this->synch_cs);
1430
1431         if (!this->cached_culture_info)
1432                 MONO_OBJECT_SETREF (this, cached_culture_info, mono_array_new_cached (mono_get_root_domain (), mono_defaults.object_class, NUM_CACHED_CULTURES * 2));
1433
1434         for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1435                 obj = mono_array_get (this->cached_culture_info, MonoObject*, i);
1436                 /* Free entry */
1437                 if (!obj) {
1438                         free_slot = i;
1439                         /* we continue, because there may be a slot used with the same domain */
1440                         continue;
1441                 }
1442                 /* Replace */
1443                 if (obj->vtable->domain == domain) {
1444                         same_domain_slot = i;
1445                         break;
1446                 }
1447         }
1448         if (same_domain_slot >= 0)
1449                 mono_array_setref (this->cached_culture_info, same_domain_slot, culture);
1450         else if (free_slot >= 0)
1451                 mono_array_setref (this->cached_culture_info, free_slot, culture);
1452         /* we may want to replace an existing entry here, even when no suitable slot is found */
1453
1454         LeaveCriticalSection (this->synch_cs);
1455 }
1456
1457 void
1458 ves_icall_System_Threading_Thread_SetCachedCurrentCulture (MonoThread *this, MonoObject *culture)
1459 {
1460         MonoDomain *domain = mono_object_get_domain (&this->obj);
1461         g_assert (domain == mono_domain_get ());
1462         cache_culture (this->internal_thread, culture, CULTURES_START_IDX);
1463 }
1464
1465 MonoObject*
1466 ves_icall_System_Threading_Thread_GetCachedCurrentUICulture (MonoInternalThread *this)
1467 {
1468         return lookup_cached_culture (this, mono_domain_get (), UICULTURES_START_IDX);
1469 }
1470
1471 void
1472 ves_icall_System_Threading_Thread_SetCachedCurrentUICulture (MonoThread *this, MonoObject *culture)
1473 {
1474         MonoDomain *domain = mono_object_get_domain (&this->obj);
1475         g_assert (domain == mono_domain_get ());
1476         cache_culture (this->internal_thread, culture, UICULTURES_START_IDX);
1477 }
1478
1479 MonoThread *
1480 mono_thread_current (void)
1481 {
1482         MonoDomain *domain = mono_domain_get ();
1483         MonoInternalThread *internal = mono_thread_internal_current ();
1484         MonoThread **current_thread_ptr;
1485
1486         g_assert (internal);
1487         current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1488
1489         if (!*current_thread_ptr) {
1490                 g_assert (domain != mono_get_root_domain ());
1491                 *current_thread_ptr = new_thread_with_internal (domain, internal);
1492         }
1493         return *current_thread_ptr;
1494 }
1495
1496 MonoInternalThread*
1497 mono_thread_internal_current (void)
1498 {
1499         MonoInternalThread *res = GET_CURRENT_OBJECT ();
1500         THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1501         return res;
1502 }
1503
1504 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoInternalThread *this,
1505                                                          int ms, HANDLE thread)
1506 {
1507         MonoInternalThread *cur_thread = mono_thread_internal_current ();
1508         gboolean ret;
1509
1510         mono_thread_current_check_pending_interrupt ();
1511
1512         ensure_synch_cs_set (this);
1513
1514         EnterCriticalSection (this->synch_cs);
1515
1516         if ((this->state & ThreadState_Unstarted) != 0) {
1517                 LeaveCriticalSection (this->synch_cs);
1518
1519                 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1520                 return FALSE;
1521         }
1522
1523         LeaveCriticalSection (this->synch_cs);
1524
1525         if(ms== -1) {
1526                 ms=INFINITE;
1527         }
1528         THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1529
1530         mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1531
1532         ret=WaitForSingleObjectEx (thread, ms, TRUE);
1533
1534         mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1535
1536         if(ret==WAIT_OBJECT_0) {
1537                 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1538
1539                 return(TRUE);
1540         }
1541
1542         THREAD_DEBUG (g_message ("%s: join failed", __func__));
1543
1544         return(FALSE);
1545 }
1546
1547 /* FIXME: exitContext isnt documented */
1548 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1549 {
1550         HANDLE *handles;
1551         guint32 numhandles;
1552         guint32 ret;
1553         guint32 i;
1554         MonoObject *waitHandle;
1555         MonoInternalThread *thread = mono_thread_internal_current ();
1556
1557         /* Do this WaitSleepJoin check before creating objects */
1558         mono_thread_current_check_pending_interrupt ();
1559
1560         numhandles = mono_array_length(mono_handles);
1561         handles = g_new0(HANDLE, numhandles);
1562
1563         for(i = 0; i < numhandles; i++) {
1564                 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1565                 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1566         }
1567
1568         if(ms== -1) {
1569                 ms=INFINITE;
1570         }
1571
1572         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1573
1574         ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1575
1576         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1577
1578         g_free(handles);
1579
1580         if(ret==WAIT_FAILED) {
1581                 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1582                 return(FALSE);
1583         } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1584                 /* Do we want to try again if we get
1585                  * WAIT_IO_COMPLETION? The documentation for
1586                  * WaitHandle doesn't give any clues.  (We'd have to
1587                  * fiddle with the timeout if we retry.)
1588                  */
1589                 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1590                 return(FALSE);
1591         }
1592
1593         return(TRUE);
1594 }
1595
1596 /* FIXME: exitContext isnt documented */
1597 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1598 {
1599         HANDLE *handles;
1600         guint32 numhandles;
1601         guint32 ret;
1602         guint32 i;
1603         MonoObject *waitHandle;
1604         MonoInternalThread *thread = mono_thread_internal_current ();
1605
1606         /* Do this WaitSleepJoin check before creating objects */
1607         mono_thread_current_check_pending_interrupt ();
1608
1609         numhandles = mono_array_length(mono_handles);
1610         handles = g_new0(HANDLE, numhandles);
1611
1612         for(i = 0; i < numhandles; i++) {
1613                 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1614                 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1615         }
1616
1617         if(ms== -1) {
1618                 ms=INFINITE;
1619         }
1620
1621         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1622
1623         ret=WaitForMultipleObjectsEx(numhandles, handles, FALSE, ms, TRUE);
1624
1625         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1626
1627         g_free(handles);
1628
1629         THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1630
1631         /*
1632          * These need to be here.  See MSDN dos on WaitForMultipleObjects.
1633          */
1634         if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1635                 return ret - WAIT_OBJECT_0;
1636         }
1637         else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1638                 return ret - WAIT_ABANDONED_0;
1639         }
1640         else {
1641                 return ret;
1642         }
1643 }
1644
1645 /* FIXME: exitContext isnt documented */
1646 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1647 {
1648         guint32 ret;
1649         MonoInternalThread *thread = mono_thread_internal_current ();
1650
1651         THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1652
1653         if(ms== -1) {
1654                 ms=INFINITE;
1655         }
1656
1657         mono_thread_current_check_pending_interrupt ();
1658
1659         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1660
1661         ret=WaitForSingleObjectEx (handle, ms, TRUE);
1662
1663         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1664
1665         if(ret==WAIT_FAILED) {
1666                 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1667                 return(FALSE);
1668         } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1669                 /* Do we want to try again if we get
1670                  * WAIT_IO_COMPLETION? The documentation for
1671                  * WaitHandle doesn't give any clues.  (We'd have to
1672                  * fiddle with the timeout if we retry.)
1673                  */
1674                 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1675                 return(FALSE);
1676         }
1677
1678         return(TRUE);
1679 }
1680
1681 gboolean
1682 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1683 {
1684         guint32 ret;
1685         MonoInternalThread *thread = mono_thread_internal_current ();
1686
1687         MONO_ARCH_SAVE_REGS;
1688
1689         if (ms == -1)
1690                 ms = INFINITE;
1691
1692         mono_thread_current_check_pending_interrupt ();
1693
1694         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1695
1696         ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1697
1698         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1699
1700         return  (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1701 }
1702
1703 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1704 {
1705         HANDLE mutex;
1706
1707         MONO_ARCH_SAVE_REGS;
1708
1709         *created = TRUE;
1710
1711         if (name == NULL) {
1712                 mutex = CreateMutex (NULL, owned, NULL);
1713         } else {
1714                 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1715
1716                 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1717                         *created = FALSE;
1718                 }
1719         }
1720
1721         return(mutex);
1722 }
1723
1724 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1725         MONO_ARCH_SAVE_REGS;
1726
1727         return(ReleaseMutex (handle));
1728 }
1729
1730 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1731                                                             gint32 rights,
1732                                                             gint32 *error)
1733 {
1734         HANDLE ret;
1735
1736         MONO_ARCH_SAVE_REGS;
1737
1738         *error = ERROR_SUCCESS;
1739
1740         ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1741         if (ret == NULL) {
1742                 *error = GetLastError ();
1743         }
1744
1745         return(ret);
1746 }
1747
1748
1749 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1750 {
1751         HANDLE sem;
1752
1753         MONO_ARCH_SAVE_REGS;
1754
1755         *created = TRUE;
1756
1757         if (name == NULL) {
1758                 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1759         } else {
1760                 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1761                                        mono_string_chars (name));
1762
1763                 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1764                         *created = FALSE;
1765                 }
1766         }
1767
1768         return(sem);
1769 }
1770
1771 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1772 {
1773         gint32 prevcount;
1774
1775         MONO_ARCH_SAVE_REGS;
1776
1777         *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1778
1779         return (prevcount);
1780 }
1781
1782 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1783 {
1784         HANDLE ret;
1785
1786         MONO_ARCH_SAVE_REGS;
1787
1788         *error = ERROR_SUCCESS;
1789
1790         ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1791         if (ret == NULL) {
1792                 *error = GetLastError ();
1793         }
1794
1795         return(ret);
1796 }
1797
1798 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1799 {
1800         HANDLE event;
1801
1802         MONO_ARCH_SAVE_REGS;
1803
1804         *created = TRUE;
1805
1806         if (name == NULL) {
1807                 event = CreateEvent (NULL, manual, initial, NULL);
1808         } else {
1809                 event = CreateEvent (NULL, manual, initial,
1810                                      mono_string_chars (name));
1811
1812                 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1813                         *created = FALSE;
1814                 }
1815         }
1816
1817         return(event);
1818 }
1819
1820 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1821         MONO_ARCH_SAVE_REGS;
1822
1823         return (SetEvent(handle));
1824 }
1825
1826 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1827         MONO_ARCH_SAVE_REGS;
1828
1829         return (ResetEvent(handle));
1830 }
1831
1832 void
1833 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1834         MONO_ARCH_SAVE_REGS;
1835
1836         CloseHandle (handle);
1837 }
1838
1839 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1840                                                              gint32 rights,
1841                                                              gint32 *error)
1842 {
1843         HANDLE ret;
1844
1845         MONO_ARCH_SAVE_REGS;
1846
1847         *error = ERROR_SUCCESS;
1848
1849         ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1850         if (ret == NULL) {
1851                 *error = GetLastError ();
1852         }
1853
1854         return(ret);
1855 }
1856
1857 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1858 {
1859         MONO_ARCH_SAVE_REGS;
1860
1861         return InterlockedIncrement (location);
1862 }
1863
1864 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1865 {
1866         gint64 ret;
1867
1868         MONO_ARCH_SAVE_REGS;
1869
1870         mono_interlocked_lock ();
1871
1872         ret = ++ *location;
1873
1874         mono_interlocked_unlock ();
1875
1876
1877         return ret;
1878 }
1879
1880 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1881 {
1882         MONO_ARCH_SAVE_REGS;
1883
1884         return InterlockedDecrement(location);
1885 }
1886
1887 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1888 {
1889         gint64 ret;
1890
1891         MONO_ARCH_SAVE_REGS;
1892
1893         mono_interlocked_lock ();
1894
1895         ret = -- *location;
1896
1897         mono_interlocked_unlock ();
1898
1899         return ret;
1900 }
1901
1902 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1903 {
1904         MONO_ARCH_SAVE_REGS;
1905
1906         return InterlockedExchange(location, value);
1907 }
1908
1909 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1910 {
1911         MonoObject *res;
1912         res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1913         mono_gc_wbarrier_generic_nostore (location);
1914         return res;
1915 }
1916
1917 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1918 {
1919         return InterlockedExchangePointer(location, value);
1920 }
1921
1922 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1923 {
1924         IntFloatUnion val, ret;
1925
1926         MONO_ARCH_SAVE_REGS;
1927
1928         val.fval = value;
1929         ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1930
1931         return ret.fval;
1932 }
1933
1934 gint64
1935 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1936 {
1937 #if SIZEOF_VOID_P == 8
1938         return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1939 #else
1940         gint64 res;
1941
1942         /*
1943          * According to MSDN, this function is only atomic with regards to the
1944          * other Interlocked functions on 32 bit platforms.
1945          */
1946         mono_interlocked_lock ();
1947         res = *location;
1948         *location = value;
1949         mono_interlocked_unlock ();
1950
1951         return res;
1952 #endif
1953 }
1954
1955 gdouble
1956 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1957 {
1958 #if SIZEOF_VOID_P == 8
1959         LongDoubleUnion val, ret;
1960
1961         val.fval = value;
1962         ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1963
1964         return ret.fval;
1965 #else
1966         gdouble res;
1967
1968         /*
1969          * According to MSDN, this function is only atomic with regards to the
1970          * other Interlocked functions on 32 bit platforms.
1971          */
1972         mono_interlocked_lock ();
1973         res = *location;
1974         *location = value;
1975         mono_interlocked_unlock ();
1976
1977         return res;
1978 #endif
1979 }
1980
1981 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1982 {
1983         MONO_ARCH_SAVE_REGS;
1984
1985         return InterlockedCompareExchange(location, value, comparand);
1986 }
1987
1988 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1989 {
1990         MonoObject *res;
1991         res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1992         mono_gc_wbarrier_generic_nostore (location);
1993         return res;
1994 }
1995
1996 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1997 {
1998         return InterlockedCompareExchangePointer(location, value, comparand);
1999 }
2000
2001 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2002 {
2003         IntFloatUnion val, ret, cmp;
2004
2005         MONO_ARCH_SAVE_REGS;
2006
2007         val.fval = value;
2008         cmp.fval = comparand;
2009         ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2010
2011         return ret.fval;
2012 }
2013
2014 gdouble
2015 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2016 {
2017 #if SIZEOF_VOID_P == 8
2018         LongDoubleUnion val, comp, ret;
2019
2020         val.fval = value;
2021         comp.fval = comparand;
2022         ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2023
2024         return ret.fval;
2025 #else
2026         gdouble old;
2027
2028         mono_interlocked_lock ();
2029         old = *location;
2030         if (old == comparand)
2031                 *location = value;
2032         mono_interlocked_unlock ();
2033
2034         return old;
2035 #endif
2036 }
2037
2038 gint64
2039 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2040 {
2041 #if SIZEOF_VOID_P == 8
2042         return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
2043 #else
2044         gint64 old;
2045
2046         mono_interlocked_lock ();
2047         old = *location;
2048         if (old == comparand)
2049                 *location = value;
2050         mono_interlocked_unlock ();
2051
2052         return old;
2053 #endif
2054 }
2055
2056 MonoObject*
2057 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2058 {
2059         MonoObject *res;
2060         res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
2061         mono_gc_wbarrier_generic_nostore (location);
2062         return res;
2063 }
2064
2065 MonoObject*
2066 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2067 {
2068         MonoObject *res;
2069         res = InterlockedExchangePointer ((gpointer *)location, value);
2070         mono_gc_wbarrier_generic_nostore (location);
2071         return res;
2072 }
2073
2074 gint32
2075 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2076 {
2077 #if SIZEOF_VOID_P == 8
2078         /* Should be implemented as a JIT intrinsic */
2079         mono_raise_exception (mono_get_exception_not_implemented (NULL));
2080         return 0;
2081 #else
2082         gint32 orig;
2083
2084         mono_interlocked_lock ();
2085         orig = *location;
2086         *location = orig + value;
2087         mono_interlocked_unlock ();
2088
2089         return orig + value;
2090 #endif
2091 }
2092
2093 gint64
2094 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2095 {
2096 #if SIZEOF_VOID_P == 8
2097         /* Should be implemented as a JIT intrinsic */
2098         mono_raise_exception (mono_get_exception_not_implemented (NULL));
2099         return 0;
2100 #else
2101         gint64 orig;
2102
2103         mono_interlocked_lock ();
2104         orig = *location;
2105         *location = orig + value;
2106         mono_interlocked_unlock ();
2107
2108         return orig + value;
2109 #endif
2110 }
2111
2112 gint64
2113 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2114 {
2115 #if SIZEOF_VOID_P == 8
2116         /* 64 bit reads are already atomic */
2117         return *location;
2118 #else
2119         gint64 res;
2120
2121         mono_interlocked_lock ();
2122         res = *location;
2123         mono_interlocked_unlock ();
2124
2125         return res;
2126 #endif
2127 }
2128
2129 void
2130 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2131 {
2132         mono_threads_lock ();
2133         mono_threads_unlock ();
2134 }
2135
2136 void
2137 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this, guint32 state)
2138 {
2139         mono_thread_clr_state (this, state);
2140
2141         if (state & ThreadState_Background) {
2142                 /* If the thread changes the background mode, the main thread has to
2143                  * be notified, since it has to rebuild the list of threads to
2144                  * wait for.
2145                  */
2146                 SetEvent (background_change_event);
2147         }
2148 }
2149
2150 void
2151 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this, guint32 state)
2152 {
2153         mono_thread_set_state (this, state);
2154
2155         if (state & ThreadState_Background) {
2156                 /* If the thread changes the background mode, the main thread has to
2157                  * be notified, since it has to rebuild the list of threads to
2158                  * wait for.
2159                  */
2160                 SetEvent (background_change_event);
2161         }
2162 }
2163
2164 guint32
2165 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this)
2166 {
2167         guint32 state;
2168
2169         ensure_synch_cs_set (this);
2170
2171         EnterCriticalSection (this->synch_cs);
2172
2173         state = this->state;
2174
2175         LeaveCriticalSection (this->synch_cs);
2176
2177         return state;
2178 }
2179
2180 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoInternalThread *this)
2181 {
2182         gboolean throw = FALSE;
2183
2184         ensure_synch_cs_set (this);
2185
2186         if (this == mono_thread_internal_current ())
2187                 return;
2188
2189         EnterCriticalSection (this->synch_cs);
2190
2191         this->thread_interrupt_requested = TRUE;
2192
2193         if (this->state & ThreadState_WaitSleepJoin) {
2194                 throw = TRUE;
2195         }
2196
2197         LeaveCriticalSection (this->synch_cs);
2198
2199         if (throw) {
2200                 signal_thread_state_change (this);
2201         }
2202 }
2203
2204 void mono_thread_current_check_pending_interrupt ()
2205 {
2206         MonoInternalThread *thread = mono_thread_internal_current ();
2207         gboolean throw = FALSE;
2208
2209         mono_debugger_check_interruption ();
2210
2211         ensure_synch_cs_set (thread);
2212
2213         EnterCriticalSection (thread->synch_cs);
2214
2215         if (thread->thread_interrupt_requested) {
2216                 throw = TRUE;
2217                 thread->thread_interrupt_requested = FALSE;
2218         }
2219
2220         LeaveCriticalSection (thread->synch_cs);
2221
2222         if (throw) {
2223                 mono_raise_exception (mono_get_exception_thread_interrupted ());
2224         }
2225 }
2226
2227 int
2228 mono_thread_get_abort_signal (void)
2229 {
2230 #ifdef HOST_WIN32
2231         return -1;
2232 #else
2233 #ifndef SIGRTMIN
2234 #ifdef SIGUSR1
2235         return SIGUSR1;
2236 #else
2237         return -1;
2238 #endif
2239 #else
2240         static int abort_signum = -1;
2241         int i;
2242         if (abort_signum != -1)
2243                 return abort_signum;
2244         /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2245         for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2246                 struct sigaction sinfo;
2247                 sigaction (i, NULL, &sinfo);
2248                 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2249                         abort_signum = i;
2250                         return i;
2251                 }
2252         }
2253         /* fallback to the old way */
2254         return SIGRTMIN;
2255 #endif
2256 #endif /* HOST_WIN32 */
2257 }
2258
2259 #ifdef HOST_WIN32
2260 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2261 {
2262         MonoException* exc = mono_thread_request_interruption (FALSE);
2263         if (exc) mono_raise_exception (exc);
2264 }
2265 #endif /* HOST_WIN32 */
2266
2267 /*
2268  * signal_thread_state_change
2269  *
2270  * Tells the thread that his state has changed and it has to enter the new
2271  * state as soon as possible.
2272  */
2273 static void signal_thread_state_change (MonoInternalThread *thread)
2274 {
2275         if (thread == mono_thread_internal_current ()) {
2276                 /* Do it synchronously */
2277                 MonoException *exc = mono_thread_request_interruption (FALSE);
2278                 if (exc)
2279                         mono_raise_exception (exc);
2280         }
2281
2282 #ifdef HOST_WIN32
2283         QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2284 #else
2285         /* fixme: store the state somewhere */
2286 #ifdef PTHREAD_POINTER_ID
2287         pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
2288 #else
2289         pthread_kill (thread->tid, mono_thread_get_abort_signal ());
2290 #endif
2291
2292         /*
2293          * This will cause waits to be broken.
2294          * It will also prevent the thread from entering a wait, so if the thread returns
2295          * from the wait before it receives the abort signal, it will just spin in the wait
2296          * functions in the io-layer until the signal handler calls QueueUserAPC which will
2297          * make it return.
2298          */
2299         wapi_interrupt_thread (thread->handle);
2300 #endif /* HOST_WIN32 */
2301 }
2302
2303 void
2304 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2305 {
2306         ensure_synch_cs_set (thread);
2307
2308         EnterCriticalSection (thread->synch_cs);
2309
2310         if ((thread->state & ThreadState_AbortRequested) != 0 ||
2311                 (thread->state & ThreadState_StopRequested) != 0 ||
2312                 (thread->state & ThreadState_Stopped) != 0)
2313         {
2314                 LeaveCriticalSection (thread->synch_cs);
2315                 return;
2316         }
2317
2318         if ((thread->state & ThreadState_Unstarted) != 0) {
2319                 thread->state |= ThreadState_Aborted;
2320                 LeaveCriticalSection (thread->synch_cs);
2321                 return;
2322         }
2323
2324         thread->state |= ThreadState_AbortRequested;
2325         if (thread->abort_state_handle)
2326                 mono_gchandle_free (thread->abort_state_handle);
2327         if (state) {
2328                 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2329                 g_assert (thread->abort_state_handle);
2330         } else {
2331                 thread->abort_state_handle = 0;
2332         }
2333         thread->abort_exc = NULL;
2334
2335         /*
2336          * abort_exc is set in mono_thread_execute_interruption(),
2337          * triggered by the call to signal_thread_state_change(),
2338          * below.  There's a point between where we have
2339          * abort_state_handle set, but abort_exc NULL, but that's not
2340          * a problem.
2341          */
2342
2343         LeaveCriticalSection (thread->synch_cs);
2344
2345         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2346
2347         /* During shutdown, we can't wait for other threads */
2348         if (!shutting_down)
2349                 /* Make sure the thread is awake */
2350                 mono_thread_resume (thread);
2351
2352         signal_thread_state_change (thread);
2353 }
2354
2355 void
2356 ves_icall_System_Threading_Thread_ResetAbort (void)
2357 {
2358         MonoInternalThread *thread = mono_thread_internal_current ();
2359         gboolean was_aborting;
2360
2361         ensure_synch_cs_set (thread);
2362
2363         EnterCriticalSection (thread->synch_cs);
2364         was_aborting = thread->state & ThreadState_AbortRequested;
2365         thread->state &= ~ThreadState_AbortRequested;
2366         LeaveCriticalSection (thread->synch_cs);
2367
2368         if (!was_aborting) {
2369                 const char *msg = "Unable to reset abort because no abort was requested";
2370                 mono_raise_exception (mono_get_exception_thread_state (msg));
2371         }
2372         thread->abort_exc = NULL;
2373         if (thread->abort_state_handle) {
2374                 mono_gchandle_free (thread->abort_state_handle);
2375                 /* This is actually not necessary - the handle
2376                    only counts if the exception is set */
2377                 thread->abort_state_handle = 0;
2378         }
2379 }
2380
2381 void
2382 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2383 {
2384         ensure_synch_cs_set (thread);
2385
2386         EnterCriticalSection (thread->synch_cs);
2387
2388         thread->state &= ~ThreadState_AbortRequested;
2389
2390         if (thread->abort_exc) {
2391                 thread->abort_exc = NULL;
2392                 if (thread->abort_state_handle) {
2393                         mono_gchandle_free (thread->abort_state_handle);
2394                         /* This is actually not necessary - the handle
2395                            only counts if the exception is set */
2396                         thread->abort_state_handle = 0;
2397                 }
2398         }
2399
2400         LeaveCriticalSection (thread->synch_cs);
2401 }
2402
2403 MonoObject*
2404 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this)
2405 {
2406         MonoInternalThread *thread = this->internal_thread;
2407         MonoObject *state, *deserialized = NULL, *exc;
2408         MonoDomain *domain;
2409
2410         if (!thread->abort_state_handle)
2411                 return NULL;
2412
2413         state = mono_gchandle_get_target (thread->abort_state_handle);
2414         g_assert (state);
2415
2416         domain = mono_domain_get ();
2417         if (mono_object_domain (state) == domain)
2418                 return state;
2419
2420         deserialized = mono_object_xdomain_representation (state, domain, &exc);
2421
2422         if (!deserialized) {
2423                 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2424                 if (exc)
2425                         MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2426                 mono_raise_exception (invalid_op_exc);
2427         }
2428
2429         return deserialized;
2430 }
2431
2432 static gboolean
2433 mono_thread_suspend (MonoInternalThread *thread)
2434 {
2435         ensure_synch_cs_set (thread);
2436
2437         EnterCriticalSection (thread->synch_cs);
2438
2439         if ((thread->state & ThreadState_Unstarted) != 0 ||
2440                 (thread->state & ThreadState_Aborted) != 0 ||
2441                 (thread->state & ThreadState_Stopped) != 0)
2442         {
2443                 LeaveCriticalSection (thread->synch_cs);
2444                 return FALSE;
2445         }
2446
2447         if ((thread->state & ThreadState_Suspended) != 0 ||
2448                 (thread->state & ThreadState_SuspendRequested) != 0 ||
2449                 (thread->state & ThreadState_StopRequested) != 0)
2450         {
2451                 LeaveCriticalSection (thread->synch_cs);
2452                 return TRUE;
2453         }
2454
2455         thread->state |= ThreadState_SuspendRequested;
2456
2457         LeaveCriticalSection (thread->synch_cs);
2458
2459         signal_thread_state_change (thread);
2460         return TRUE;
2461 }
2462
2463 void
2464 ves_icall_System_Threading_Thread_Suspend (MonoInternalThread *thread)
2465 {
2466         if (!mono_thread_suspend (thread))
2467                 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2468 }
2469
2470 static gboolean
2471 mono_thread_resume (MonoInternalThread *thread)
2472 {
2473         ensure_synch_cs_set (thread);
2474
2475         EnterCriticalSection (thread->synch_cs);
2476
2477         if ((thread->state & ThreadState_SuspendRequested) != 0) {
2478                 thread->state &= ~ThreadState_SuspendRequested;
2479                 LeaveCriticalSection (thread->synch_cs);
2480                 return TRUE;
2481         }
2482
2483         if ((thread->state & ThreadState_Suspended) == 0 ||
2484                 (thread->state & ThreadState_Unstarted) != 0 ||
2485                 (thread->state & ThreadState_Aborted) != 0 ||
2486                 (thread->state & ThreadState_Stopped) != 0)
2487         {
2488                 LeaveCriticalSection (thread->synch_cs);
2489                 return FALSE;
2490         }
2491
2492         thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2493         if (thread->resume_event == NULL) {
2494                 LeaveCriticalSection (thread->synch_cs);
2495                 return(FALSE);
2496         }
2497
2498         /* Awake the thread */
2499         SetEvent (thread->suspend_event);
2500
2501         LeaveCriticalSection (thread->synch_cs);
2502
2503         /* Wait for the thread to awake */
2504         WaitForSingleObject (thread->resume_event, INFINITE);
2505         CloseHandle (thread->resume_event);
2506         thread->resume_event = NULL;
2507
2508         return TRUE;
2509 }
2510
2511 void
2512 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2513 {
2514         if (!thread->internal_thread || !mono_thread_resume (thread->internal_thread))
2515                 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2516 }
2517
2518 static gboolean
2519 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2520 {
2521         if (managed)
2522                 return TRUE;
2523
2524         if (m->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
2525                 m->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
2526                 m->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH)
2527         {
2528                 *((gboolean*)data) = TRUE;
2529                 return TRUE;
2530         }
2531         return FALSE;
2532 }
2533
2534 static gboolean
2535 is_running_protected_wrapper (void)
2536 {
2537         gboolean found = FALSE;
2538         mono_stack_walk (find_wrapper, &found);
2539         return found;
2540 }
2541
2542 void mono_thread_internal_stop (MonoInternalThread *thread)
2543 {
2544         ensure_synch_cs_set (thread);
2545
2546         EnterCriticalSection (thread->synch_cs);
2547
2548         if ((thread->state & ThreadState_StopRequested) != 0 ||
2549                 (thread->state & ThreadState_Stopped) != 0)
2550         {
2551                 LeaveCriticalSection (thread->synch_cs);
2552                 return;
2553         }
2554
2555         /* Make sure the thread is awake */
2556         mono_thread_resume (thread);
2557
2558         thread->state |= ThreadState_StopRequested;
2559         thread->state &= ~ThreadState_AbortRequested;
2560
2561         LeaveCriticalSection (thread->synch_cs);
2562
2563         signal_thread_state_change (thread);
2564 }
2565
2566 void mono_thread_stop (MonoThread *thread)
2567 {
2568         mono_thread_internal_stop (thread->internal_thread);
2569 }
2570
2571 gint8
2572 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2573 {
2574         return *((volatile gint8 *) (ptr));
2575 }
2576
2577 gint16
2578 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2579 {
2580         return *((volatile gint16 *) (ptr));
2581 }
2582
2583 gint32
2584 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2585 {
2586         return *((volatile gint32 *) (ptr));
2587 }
2588
2589 gint64
2590 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2591 {
2592         return *((volatile gint64 *) (ptr));
2593 }
2594
2595 void *
2596 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2597 {
2598         return (void *)  *((volatile void **) ptr);
2599 }
2600
2601 void
2602 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2603 {
2604         *((volatile gint8 *) ptr) = value;
2605 }
2606
2607 void
2608 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2609 {
2610         *((volatile gint16 *) ptr) = value;
2611 }
2612
2613 void
2614 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2615 {
2616         *((volatile gint32 *) ptr) = value;
2617 }
2618
2619 void
2620 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2621 {
2622         *((volatile gint64 *) ptr) = value;
2623 }
2624
2625 void
2626 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2627 {
2628         *((volatile void **) ptr) = value;
2629 }
2630
2631 void
2632 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2633 {
2634         mono_gc_wbarrier_generic_store (ptr, value);
2635 }
2636
2637 void mono_thread_init (MonoThreadStartCB start_cb,
2638                        MonoThreadAttachCB attach_cb)
2639 {
2640         MONO_GC_REGISTER_ROOT (small_id_table);
2641         InitializeCriticalSection(&threads_mutex);
2642         InitializeCriticalSection(&interlocked_mutex);
2643         InitializeCriticalSection(&contexts_mutex);
2644         InitializeCriticalSection(&delayed_free_table_mutex);
2645         InitializeCriticalSection(&small_id_mutex);
2646
2647         background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2648         g_assert(background_change_event != NULL);
2649
2650         mono_init_static_data_info (&thread_static_info);
2651         mono_init_static_data_info (&context_static_info);
2652
2653         current_object_key=TlsAlloc();
2654         THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2655
2656         mono_thread_start_cb = start_cb;
2657         mono_thread_attach_cb = attach_cb;
2658
2659         delayed_free_table = g_array_new (FALSE, FALSE, sizeof (DelayedFreeItem));
2660
2661         /* Get a pseudo handle to the current process.  This is just a
2662          * kludge so that wapi can build a process handle if needed.
2663          * As a pseudo handle is returned, we don't need to clean
2664          * anything up.
2665          */
2666         GetCurrentProcess ();
2667 }
2668
2669 void mono_thread_cleanup (void)
2670 {
2671         mono_thread_hazardous_try_free_all ();
2672
2673 #if !defined(HOST_WIN32) && !defined(RUN_IN_SUBTHREAD)
2674         /* The main thread must abandon any held mutexes (particularly
2675          * important for named mutexes as they are shared across
2676          * processes, see bug 74680.)  This will happen when the
2677          * thread exits, but if it's not running in a subthread it
2678          * won't exit in time.
2679          */
2680         /* Using non-w32 API is a nasty kludge, but I couldn't find
2681          * anything in the documentation that would let me do this
2682          * here yet still be safe to call on windows.
2683          */
2684         _wapi_thread_signal_self (mono_environment_exitcode_get ());
2685 #endif
2686
2687 #if 0
2688         /* This stuff needs more testing, it seems one of these
2689          * critical sections can be locked when mono_thread_cleanup is
2690          * called.
2691          */
2692         DeleteCriticalSection (&threads_mutex);
2693         DeleteCriticalSection (&interlocked_mutex);
2694         DeleteCriticalSection (&contexts_mutex);
2695         DeleteCriticalSection (&delayed_free_table_mutex);
2696         DeleteCriticalSection (&small_id_mutex);
2697         CloseHandle (background_change_event);
2698 #endif
2699
2700         g_array_free (delayed_free_table, TRUE);
2701         delayed_free_table = NULL;
2702
2703         TlsFree (current_object_key);
2704 }
2705
2706 void
2707 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2708 {
2709         mono_thread_cleanup_fn = func;
2710 }
2711
2712 void
2713 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2714 {
2715         thread->internal_thread->manage_callback = func;
2716 }
2717
2718 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2719 {
2720         mono_thread_notify_pending_exc_fn = func;
2721 }
2722
2723 G_GNUC_UNUSED
2724 static void print_tids (gpointer key, gpointer value, gpointer user)
2725 {
2726         /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2727          * sizeof(uint) and a cast to uint would overflow
2728          */
2729         /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2730          * print this as a pointer.
2731          */
2732         g_message ("Waiting for: %p", key);
2733 }
2734
2735 struct wait_data
2736 {
2737         HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2738         MonoInternalThread *threads[MAXIMUM_WAIT_OBJECTS];
2739         guint32 num;
2740 };
2741
2742 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2743 {
2744         guint32 i, ret;
2745
2746         THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2747
2748         ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2749
2750         if(ret==WAIT_FAILED) {
2751                 /* See the comment in build_wait_tids() */
2752                 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2753                 return;
2754         }
2755
2756         for(i=0; i<wait->num; i++)
2757                 CloseHandle (wait->handles[i]);
2758
2759         if (ret == WAIT_TIMEOUT)
2760                 return;
2761
2762         for(i=0; i<wait->num; i++) {
2763                 gsize tid = wait->threads[i]->tid;
2764
2765                 mono_threads_lock ();
2766                 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2767                         /* This thread must have been killed, because
2768                          * it hasn't cleaned itself up. (It's just
2769                          * possible that the thread exited before the
2770                          * parent thread had a chance to store the
2771                          * handle, and now there is another pointer to
2772                          * the already-exited thread stored.  In this
2773                          * case, we'll just get two
2774                          * mono_profiler_thread_end() calls for the
2775                          * same thread.)
2776                          */
2777
2778                         mono_threads_unlock ();
2779                         THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2780                         thread_cleanup (wait->threads[i]);
2781                 } else {
2782                         mono_threads_unlock ();
2783                 }
2784         }
2785 }
2786
2787 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2788 {
2789         guint32 i, ret, count;
2790
2791         THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2792
2793         /* Add the thread state change event, so it wakes up if a thread changes
2794          * to background mode.
2795          */
2796         count = wait->num;
2797         if (count < MAXIMUM_WAIT_OBJECTS) {
2798                 wait->handles [count] = background_change_event;
2799                 count++;
2800         }
2801
2802         ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
2803
2804         if(ret==WAIT_FAILED) {
2805                 /* See the comment in build_wait_tids() */
2806                 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2807                 return;
2808         }
2809
2810         for(i=0; i<wait->num; i++)
2811                 CloseHandle (wait->handles[i]);
2812
2813         if (ret == WAIT_TIMEOUT)
2814                 return;
2815
2816         if (ret < wait->num) {
2817                 gsize tid = wait->threads[ret]->tid;
2818                 mono_threads_lock ();
2819                 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2820                         /* See comment in wait_for_tids about thread cleanup */
2821                         mono_threads_unlock ();
2822                         THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2823                         thread_cleanup (wait->threads [ret]);
2824                 } else
2825                         mono_threads_unlock ();
2826         }
2827 }
2828
2829 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2830 {
2831         struct wait_data *wait=(struct wait_data *)user;
2832
2833         if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2834                 HANDLE handle;
2835                 MonoInternalThread *thread=(MonoInternalThread *)value;
2836
2837                 /* Ignore background threads, we abort them later */
2838                 /* Do not lock here since it is not needed and the caller holds threads_lock */
2839                 if (thread->state & ThreadState_Background) {
2840                         THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2841                         return; /* just leave, ignore */
2842                 }
2843
2844                 if (mono_gc_is_finalizer_internal_thread (thread)) {
2845                         THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2846                         return;
2847                 }
2848
2849                 if (thread == mono_thread_internal_current ()) {
2850                         THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2851                         return;
2852                 }
2853
2854                 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
2855                         THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2856                         return;
2857                 }
2858
2859                 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2860                         THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2861                         return;
2862                 }
2863
2864                 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2865                 if (handle == NULL) {
2866                         THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2867                         return;
2868                 }
2869
2870                 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2871                 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
2872                         wait->handles[wait->num]=handle;
2873                         wait->threads[wait->num]=thread;
2874                         wait->num++;
2875
2876                         THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2877                 } else {
2878                         THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2879                 }
2880
2881
2882         } else {
2883                 /* Just ignore the rest, we can't do anything with
2884                  * them yet
2885                  */
2886         }
2887 }
2888
2889 static gboolean
2890 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2891 {
2892         struct wait_data *wait=(struct wait_data *)user;
2893         gsize self = GetCurrentThreadId ();
2894         MonoInternalThread *thread = value;
2895         HANDLE handle;
2896
2897         if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2898                 return FALSE;
2899
2900         /* The finalizer thread is not a background thread */
2901         if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2902                 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2903
2904                 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2905                 if (handle == NULL)
2906                         return FALSE;
2907
2908                 /* printf ("A: %d\n", wait->num); */
2909                 wait->handles[wait->num]=thread->handle;
2910                 wait->threads[wait->num]=thread;
2911                 wait->num++;
2912
2913                 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2914                 mono_thread_internal_stop (thread);
2915                 return TRUE;
2916         }
2917
2918         return (thread->tid != self && !mono_gc_is_finalizer_internal_thread (thread));
2919 }
2920
2921 /**
2922  * mono_threads_set_shutting_down:
2923  *
2924  * Is called by a thread that wants to shut down Mono. If the runtime is already
2925  * shutting down, the calling thread is suspended/stopped, and this function never
2926  * returns.
2927  */
2928 void
2929 mono_threads_set_shutting_down (void)
2930 {
2931         MonoInternalThread *current_thread = mono_thread_internal_current ();
2932
2933         mono_threads_lock ();
2934
2935         if (shutting_down) {
2936                 mono_threads_unlock ();
2937
2938                 /* Make sure we're properly suspended/stopped */
2939
2940                 EnterCriticalSection (current_thread->synch_cs);
2941
2942                 if ((current_thread->state & ThreadState_SuspendRequested) ||
2943                     (current_thread->state & ThreadState_AbortRequested) ||
2944                     (current_thread->state & ThreadState_StopRequested)) {
2945                         LeaveCriticalSection (current_thread->synch_cs);
2946                         mono_thread_execute_interruption (current_thread);
2947                 } else {
2948                         current_thread->state |= ThreadState_Stopped;
2949                         LeaveCriticalSection (current_thread->synch_cs);
2950                 }
2951
2952                 /* Wake up other threads potentially waiting for us */
2953                 ExitThread (0);
2954         } else {
2955                 shutting_down = TRUE;
2956
2957                 /* Not really a background state change, but this will
2958                  * interrupt the main thread if it is waiting for all
2959                  * the other threads.
2960                  */
2961                 SetEvent (background_change_event);
2962
2963                 mono_threads_unlock ();
2964         }
2965 }
2966
2967 /**
2968  * mono_threads_is_shutting_down:
2969  *
2970  * Returns whether a thread has commenced shutdown of Mono.  Note that
2971  * if the function returns FALSE the caller must not assume that
2972  * shutdown is not in progress, because the situation might have
2973  * changed since the function returned.  For that reason this function
2974  * is of very limited utility.
2975  */
2976 gboolean
2977 mono_threads_is_shutting_down (void)
2978 {
2979         return shutting_down;
2980 }
2981
2982 void mono_thread_manage (void)
2983 {
2984         struct wait_data wait_data;
2985         struct wait_data *wait = &wait_data;
2986
2987         memset (wait, 0, sizeof (struct wait_data));
2988         /* join each thread that's still running */
2989         THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2990
2991         mono_threads_lock ();
2992         if(threads==NULL) {
2993                 THREAD_DEBUG (g_message("%s: No threads", __func__));
2994                 mono_threads_unlock ();
2995                 return;
2996         }
2997         mono_threads_unlock ();
2998
2999         do {
3000                 mono_threads_lock ();
3001                 if (shutting_down) {
3002                         /* somebody else is shutting down */
3003                         mono_threads_unlock ();
3004                         break;
3005                 }
3006                 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3007                         mono_g_hash_table_foreach (threads, print_tids, NULL));
3008
3009                 ResetEvent (background_change_event);
3010                 wait->num=0;
3011                 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3012                 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3013                 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3014                 mono_threads_unlock ();
3015                 if(wait->num>0) {
3016                         /* Something to wait for */
3017                         wait_for_tids_or_state_change (wait, INFINITE);
3018                 }
3019                 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3020         } while(wait->num>0);
3021
3022         mono_threads_set_shutting_down ();
3023
3024         /* No new threads will be created after this point */
3025
3026         mono_runtime_set_shutting_down ();
3027
3028         THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
3029         mono_thread_pool_cleanup ();
3030
3031         /*
3032          * Remove everything but the finalizer thread and self.
3033          * Also abort all the background threads
3034          * */
3035         do {
3036                 mono_threads_lock ();
3037
3038                 wait->num = 0;
3039                 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3040                 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3041                 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3042
3043                 mono_threads_unlock ();
3044
3045                 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3046                 if(wait->num>0) {
3047                         /* Something to wait for */
3048                         wait_for_tids (wait, INFINITE);
3049                 }
3050         } while (wait->num > 0);
3051
3052         /*
3053          * give the subthreads a chance to really quit (this is mainly needed
3054          * to get correct user and system times from getrusage/wait/time(1)).
3055          * This could be removed if we avoid pthread_detach() and use pthread_join().
3056          */
3057 #ifndef HOST_WIN32
3058         sched_yield ();
3059 #endif
3060 }
3061
3062 static void terminate_thread (gpointer key, gpointer value, gpointer user)
3063 {
3064         MonoInternalThread *thread=(MonoInternalThread *)value;
3065
3066         if(thread->tid != (gsize)user) {
3067                 /*TerminateThread (thread->handle, -1);*/
3068         }
3069 }
3070
3071 void mono_thread_abort_all_other_threads (void)
3072 {
3073         gsize self = GetCurrentThreadId ();
3074
3075         mono_threads_lock ();
3076         THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
3077                                  mono_g_hash_table_size (threads));
3078                       mono_g_hash_table_foreach (threads, print_tids, NULL));
3079
3080         mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
3081
3082         mono_threads_unlock ();
3083 }
3084
3085 static void
3086 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3087 {
3088         MonoInternalThread *thread = (MonoInternalThread*)value;
3089         struct wait_data *wait = (struct wait_data*)user_data;
3090         HANDLE handle;
3091
3092         /*
3093          * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3094          * limitation.
3095          * This needs no locking.
3096          */
3097         if ((thread->state & ThreadState_Suspended) != 0 ||
3098                 (thread->state & ThreadState_Stopped) != 0)
3099                 return;
3100
3101         if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3102                 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3103                 if (handle == NULL)
3104                         return;
3105
3106                 wait->handles [wait->num] = handle;
3107                 wait->threads [wait->num] = thread;
3108                 wait->num++;
3109         }
3110 }
3111
3112 /*
3113  * mono_thread_suspend_all_other_threads:
3114  *
3115  *  Suspend all managed threads except the finalizer thread and this thread. It is
3116  * not possible to resume them later.
3117  */
3118 void mono_thread_suspend_all_other_threads (void)
3119 {
3120         struct wait_data wait_data;
3121         struct wait_data *wait = &wait_data;
3122         int i;
3123         gsize self = GetCurrentThreadId ();
3124         gpointer *events;
3125         guint32 eventidx = 0;
3126         gboolean starting, finished;
3127
3128         memset (wait, 0, sizeof (struct wait_data));
3129         /*
3130          * The other threads could be in an arbitrary state at this point, i.e.
3131          * they could be starting up, shutting down etc. This means that there could be
3132          * threads which are not even in the threads hash table yet.
3133          */
3134
3135         /*
3136          * First we set a barrier which will be checked by all threads before they
3137          * are added to the threads hash table, and they will exit if the flag is set.
3138          * This ensures that no threads could be added to the hash later.
3139          * We will use shutting_down as the barrier for now.
3140          */
3141         g_assert (shutting_down);
3142
3143         /*
3144          * We make multiple calls to WaitForMultipleObjects since:
3145          * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3146          * - some threads could exit without becoming suspended
3147          */
3148         finished = FALSE;
3149         while (!finished) {
3150                 /*
3151                  * Make a copy of the hashtable since we can't do anything with
3152                  * threads while threads_mutex is held.
3153                  */
3154                 wait->num = 0;
3155                 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3156                 memset (wait->threads, 0, MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3157                 mono_threads_lock ();
3158                 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3159                 mono_threads_unlock ();
3160
3161                 events = g_new0 (gpointer, wait->num);
3162                 eventidx = 0;
3163                 /* Get the suspended events that we'll be waiting for */
3164                 for (i = 0; i < wait->num; ++i) {
3165                         MonoInternalThread *thread = wait->threads [i];
3166                         gboolean signal_suspend = FALSE;
3167
3168                         if ((thread->tid == self) || mono_gc_is_finalizer_internal_thread (thread) || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3169                                 //CloseHandle (wait->handles [i]);
3170                                 wait->threads [i] = NULL; /* ignore this thread in next loop */
3171                                 continue;
3172                         }
3173
3174                         ensure_synch_cs_set (thread);
3175
3176                         EnterCriticalSection (thread->synch_cs);
3177
3178                         if (thread->suspended_event == NULL) {
3179                                 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3180                                 if (thread->suspended_event == NULL) {
3181                                         /* Forget this one and go on to the next */
3182                                         LeaveCriticalSection (thread->synch_cs);
3183                                         continue;
3184                                 }
3185                         }
3186
3187                         if ((thread->state & ThreadState_Suspended) != 0 ||
3188                                 (thread->state & ThreadState_StopRequested) != 0 ||
3189                                 (thread->state & ThreadState_Stopped) != 0) {
3190                                 LeaveCriticalSection (thread->synch_cs);
3191                                 CloseHandle (wait->handles [i]);
3192                                 wait->threads [i] = NULL; /* ignore this thread in next loop */
3193                                 continue;
3194                         }
3195
3196                         if ((thread->state & ThreadState_SuspendRequested) == 0)
3197                                 signal_suspend = TRUE;
3198
3199                         events [eventidx++] = thread->suspended_event;
3200
3201                         /* Convert abort requests into suspend requests */
3202                         if ((thread->state & ThreadState_AbortRequested) != 0)
3203                                 thread->state &= ~ThreadState_AbortRequested;
3204
3205                         thread->state |= ThreadState_SuspendRequested;
3206
3207                         LeaveCriticalSection (thread->synch_cs);
3208
3209                         /* Signal the thread to suspend */
3210                         if (signal_suspend)
3211                                 signal_thread_state_change (thread);
3212                 }
3213
3214                 if (eventidx > 0) {
3215                         WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3216                         for (i = 0; i < wait->num; ++i) {
3217                                 MonoInternalThread *thread = wait->threads [i];
3218
3219                                 if (thread == NULL)
3220                                         continue;
3221
3222                                 ensure_synch_cs_set (thread);
3223
3224                                 EnterCriticalSection (thread->synch_cs);
3225                                 if ((thread->state & ThreadState_Suspended) != 0) {
3226                                         CloseHandle (thread->suspended_event);
3227                                         thread->suspended_event = NULL;
3228                                 }
3229                                 LeaveCriticalSection (thread->synch_cs);
3230                         }
3231                 } else {
3232                         /*
3233                          * If there are threads which are starting up, we wait until they
3234                          * are suspended when they try to register in the threads hash.
3235                          * This is guaranteed to finish, since the threads which can create new
3236                          * threads get suspended after a while.
3237                          * FIXME: The finalizer thread can still create new threads.
3238                          */
3239                         mono_threads_lock ();
3240                         if (threads_starting_up)
3241                                 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3242                         else
3243                                 starting = FALSE;
3244                         mono_threads_unlock ();
3245                         if (starting)
3246                                 Sleep (100);
3247                         else
3248                                 finished = TRUE;
3249                 }
3250
3251                 g_free (events);
3252         }
3253 }
3254
3255 static void
3256 collect_threads (gpointer key, gpointer value, gpointer user_data)
3257 {
3258         MonoInternalThread *thread = (MonoInternalThread*)value;
3259         struct wait_data *wait = (struct wait_data*)user_data;
3260         HANDLE handle;
3261
3262         if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3263                 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3264                 if (handle == NULL)
3265                         return;
3266
3267                 wait->handles [wait->num] = handle;
3268                 wait->threads [wait->num] = thread;
3269                 wait->num++;
3270         }
3271 }
3272
3273 /**
3274  * mono_threads_request_thread_dump:
3275  *
3276  *   Ask all threads except the current to print their stacktrace to stdout.
3277  */
3278 void
3279 mono_threads_request_thread_dump (void)
3280 {
3281         struct wait_data wait_data;
3282         struct wait_data *wait = &wait_data;
3283         int i;
3284
3285         memset (wait, 0, sizeof (struct wait_data));
3286
3287         /*
3288          * Make a copy of the hashtable since we can't do anything with
3289          * threads while threads_mutex is held.
3290          */
3291         mono_threads_lock ();
3292         mono_g_hash_table_foreach (threads, collect_threads, wait);
3293         mono_threads_unlock ();
3294
3295         for (i = 0; i < wait->num; ++i) {
3296                 MonoInternalThread *thread = wait->threads [i];
3297
3298                 if (!mono_gc_is_finalizer_internal_thread (thread) &&
3299                                 (thread != mono_thread_internal_current ()) &&
3300                                 !thread->thread_dump_requested) {
3301                         thread->thread_dump_requested = TRUE;
3302
3303                         signal_thread_state_change (thread);
3304                 }
3305
3306                 CloseHandle (wait->handles [i]);
3307         }
3308 }
3309
3310 /*
3311  * mono_thread_push_appdomain_ref:
3312  *
3313  *   Register that the current thread may have references to objects in domain
3314  * @domain on its stack. Each call to this function should be paired with a
3315  * call to pop_appdomain_ref.
3316  */
3317 void
3318 mono_thread_push_appdomain_ref (MonoDomain *domain)
3319 {
3320         MonoInternalThread *thread = mono_thread_internal_current ();
3321
3322         if (thread) {
3323                 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3324                 SPIN_LOCK (thread->lock_thread_id);
3325                 thread->appdomain_refs = g_slist_prepend (thread->appdomain_refs, domain);
3326                 SPIN_UNLOCK (thread->lock_thread_id);
3327         }
3328 }
3329
3330 void
3331 mono_thread_pop_appdomain_ref (void)
3332 {
3333         MonoInternalThread *thread = mono_thread_internal_current ();
3334
3335         if (thread) {
3336                 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3337                 /* FIXME: How can the list be empty ? */
3338                 SPIN_LOCK (thread->lock_thread_id);
3339                 if (thread->appdomain_refs)
3340                         thread->appdomain_refs = g_slist_remove (thread->appdomain_refs, thread->appdomain_refs->data);
3341                 SPIN_UNLOCK (thread->lock_thread_id);
3342         }
3343 }
3344
3345 gboolean
3346 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3347 {
3348         gboolean res;
3349         SPIN_LOCK (thread->lock_thread_id);
3350         res = g_slist_find (thread->appdomain_refs, domain) != NULL;
3351         SPIN_UNLOCK (thread->lock_thread_id);
3352         return res;
3353 }
3354
3355 gboolean
3356 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3357 {
3358         return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3359 }
3360
3361 typedef struct abort_appdomain_data {
3362         struct wait_data wait;
3363         MonoDomain *domain;
3364 } abort_appdomain_data;
3365
3366 static void
3367 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3368 {
3369         MonoInternalThread *thread = (MonoInternalThread*)value;
3370         abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3371         MonoDomain *domain = data->domain;
3372
3373         if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3374                 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3375
3376                 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3377                         HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3378                         if (handle == NULL)
3379                                 return;
3380                         data->wait.handles [data->wait.num] = handle;
3381                         data->wait.threads [data->wait.num] = thread;
3382                         data->wait.num++;
3383                 } else {
3384                         /* Just ignore the rest, we can't do anything with
3385                          * them yet
3386                          */
3387                 }
3388         }
3389 }
3390
3391 /*
3392  * mono_threads_abort_appdomain_threads:
3393  *
3394  *   Abort threads which has references to the given appdomain.
3395  */
3396 gboolean
3397 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3398 {
3399         abort_appdomain_data user_data;
3400         guint32 start_time;
3401         int orig_timeout = timeout;
3402         int i;
3403
3404         THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3405
3406         start_time = mono_msec_ticks ();
3407         do {
3408                 mono_threads_lock ();
3409
3410                 user_data.domain = domain;
3411                 user_data.wait.num = 0;
3412                 /* This shouldn't take any locks */
3413                 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3414                 mono_threads_unlock ();
3415
3416                 if (user_data.wait.num > 0) {
3417                         /* Abort the threads outside the threads lock */
3418                         for (i = 0; i < user_data.wait.num; ++i)
3419                                 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3420
3421                         /*
3422                          * We should wait for the threads either to abort, or to leave the
3423                          * domain. We can't do the latter, so we wait with a timeout.
3424                          */
3425                         wait_for_tids (&user_data.wait, 100);
3426                 }
3427
3428                 /* Update remaining time */
3429                 timeout -= mono_msec_ticks () - start_time;
3430                 start_time = mono_msec_ticks ();
3431
3432                 if (orig_timeout != -1 && timeout < 0)
3433                         return FALSE;
3434         }
3435         while (user_data.wait.num > 0);
3436
3437         THREAD_DEBUG (g_message ("%s: abort done", __func__));
3438
3439         return TRUE;
3440 }
3441
3442 static void
3443 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3444 {
3445         MonoInternalThread *thread = (MonoInternalThread*)value;
3446         MonoDomain *domain = (MonoDomain*)user_data;
3447         int i;
3448
3449         /* No locking needed here */
3450         /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3451
3452         if (thread->cached_culture_info) {
3453                 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3454                         MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3455                         if (obj && obj->vtable->domain == domain)
3456                                 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3457                 }
3458         }
3459 }
3460
3461 /*
3462  * mono_threads_clear_cached_culture:
3463  *
3464  *   Clear the cached_current_culture from all threads if it is in the
3465  * given appdomain.
3466  */
3467 void
3468 mono_threads_clear_cached_culture (MonoDomain *domain)
3469 {
3470         mono_threads_lock ();
3471         mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3472         mono_threads_unlock ();
3473 }
3474
3475 /*
3476  * mono_thread_get_undeniable_exception:
3477  *
3478  *   Return an exception which needs to be raised when leaving a catch clause.
3479  * This is used for undeniable exception propagation.
3480  */
3481 MonoException*
3482 mono_thread_get_undeniable_exception (void)
3483 {
3484         MonoInternalThread *thread = mono_thread_internal_current ();
3485
3486         if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3487                 /*
3488                  * FIXME: Clear the abort exception and return an AppDomainUnloaded
3489                  * exception if the thread no longer references a dying appdomain.
3490                  */
3491                 thread->abort_exc->trace_ips = NULL;
3492                 thread->abort_exc->stack_trace = NULL;
3493                 return thread->abort_exc;
3494         }
3495
3496         return NULL;
3497 }
3498
3499 #if MONO_SMALL_CONFIG
3500 #define NUM_STATIC_DATA_IDX 4
3501 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3502         64, 256, 1024, 4096
3503 };
3504 #else
3505 #define NUM_STATIC_DATA_IDX 8
3506 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3507         1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3508 };
3509 #endif
3510
3511 static uintptr_t* static_reference_bitmaps [NUM_STATIC_DATA_IDX];
3512
3513 #ifdef HAVE_SGEN_GC
3514 static void
3515 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func)
3516 {
3517         int i;
3518         gpointer *static_data = addr;
3519         for (i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3520                 int j, numwords;
3521                 void **ptr;
3522                 if (!static_data [i])
3523                         continue;
3524                 numwords = 1 + static_data_size [i] / sizeof (gpointer) / (sizeof(uintptr_t) * 8);
3525                 ptr = static_data [i];
3526                 for (j = 0; j < numwords; ++j, ptr += sizeof (uintptr_t) * 8) {
3527                         uintptr_t bmap = static_reference_bitmaps [i][j];
3528                         void ** p = ptr;
3529                         while (bmap) {
3530                                 if ((bmap & 1) && *p) {
3531                                         mark_func (p);
3532                                 }
3533                                 p++;
3534                                 bmap >>= 1;
3535                         }
3536                 }
3537         }
3538 }
3539 #endif
3540
3541 /*
3542  *  mono_alloc_static_data
3543  *
3544  *   Allocate memory blocks for storing threads or context static data
3545  */
3546 static void
3547 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3548 {
3549         guint idx = (offset >> 24) - 1;
3550         int i;
3551
3552         gpointer* static_data = *static_data_ptr;
3553         if (!static_data) {
3554                 static void* tls_desc = NULL;
3555 #ifdef HAVE_SGEN_GC
3556                 if (!tls_desc)
3557                         tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3558 #endif
3559                 static_data = mono_gc_alloc_fixed (static_data_size [0], threadlocal?tls_desc:NULL);
3560                 *static_data_ptr = static_data;
3561                 static_data [0] = static_data;
3562         }
3563
3564         for (i = 1; i <= idx; ++i) {
3565                 if (static_data [i])
3566                         continue;
3567 #ifdef HAVE_SGEN_GC
3568                 static_data [i] = threadlocal?g_malloc0 (static_data_size [i]):mono_gc_alloc_fixed (static_data_size [i], NULL);
3569 #else
3570                 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3571 #endif
3572         }
3573 }
3574
3575 static void
3576 mono_free_static_data (gpointer* static_data, gboolean threadlocal)
3577 {
3578         int i;
3579         for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3580                 if (!static_data [i])
3581                         continue;
3582 #ifdef HAVE_SGEN_GC
3583                 if (threadlocal)
3584                         g_free (static_data [i]);
3585                 else
3586                         mono_gc_free_fixed (static_data [i]);
3587 #else
3588                 mono_gc_free_fixed (static_data [i]);
3589 #endif
3590         }
3591         mono_gc_free_fixed (static_data);
3592 }
3593
3594 /*
3595  *  mono_init_static_data_info
3596  *
3597  *   Initializes static data counters
3598  */
3599 static void mono_init_static_data_info (StaticDataInfo *static_data)
3600 {
3601         static_data->idx = 0;
3602         static_data->offset = 0;
3603         static_data->freelist = NULL;
3604 }
3605
3606 /*
3607  *  mono_alloc_static_data_slot
3608  *
3609  *   Generates an offset for static data. static_data contains the counters
3610  *  used to generate it.
3611  */
3612 static guint32
3613 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3614 {
3615         guint32 offset;
3616
3617         if (!static_data->idx && !static_data->offset) {
3618                 /*
3619                  * we use the first chunk of the first allocation also as
3620                  * an array for the rest of the data
3621                  */
3622                 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3623         }
3624         static_data->offset += align - 1;
3625         static_data->offset &= ~(align - 1);
3626         if (static_data->offset + size >= static_data_size [static_data->idx]) {
3627                 static_data->idx ++;
3628                 g_assert (size <= static_data_size [static_data->idx]);
3629                 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3630                 static_data->offset = 0;
3631         }
3632         offset = static_data->offset | ((static_data->idx + 1) << 24);
3633         static_data->offset += size;
3634         return offset;
3635 }
3636
3637 /*
3638  * ensure thread static fields already allocated are valid for thread
3639  * This function is called when a thread is created or on thread attach.
3640  */
3641 static void
3642 thread_adjust_static_data (MonoInternalThread *thread)
3643 {
3644         guint32 offset;
3645
3646         mono_threads_lock ();
3647         if (thread_static_info.offset || thread_static_info.idx > 0) {
3648                 /* get the current allocated size */
3649                 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3650                 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3651         }
3652         mono_threads_unlock ();
3653 }
3654
3655 static void
3656 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3657 {
3658         MonoInternalThread *thread = value;
3659         guint32 offset = GPOINTER_TO_UINT (user);
3660
3661         mono_alloc_static_data (&(thread->static_data), offset, TRUE);
3662 }
3663
3664 static MonoThreadDomainTls*
3665 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3666 {
3667         MonoThreadDomainTls* prev = NULL;
3668         MonoThreadDomainTls* tmp = static_data->freelist;
3669         while (tmp) {
3670                 if (tmp->size == size) {
3671                         if (prev)
3672                                 prev->next = tmp->next;
3673                         else
3674                                 static_data->freelist = tmp->next;
3675                         return tmp;
3676                 }
3677                 tmp = tmp->next;
3678         }
3679         return NULL;
3680 }
3681
3682 static void
3683 update_tls_reference_bitmap (guint32 offset, uintptr_t *bitmap, int max_set)
3684 {
3685         int i;
3686         int idx = (offset >> 24) - 1;
3687         uintptr_t *rb;
3688         if (!static_reference_bitmaps [idx])
3689                 static_reference_bitmaps [idx] = g_new0 (uintptr_t, 1 + static_data_size [idx] / sizeof(gpointer) / (sizeof(uintptr_t) * 8));
3690         rb = static_reference_bitmaps [idx];
3691         offset &= 0xffffff;
3692         offset /= sizeof (gpointer);
3693         /* offset is now the bitmap offset */
3694         for (i = 0; i < max_set; ++i) {
3695                 if (bitmap [i / sizeof (uintptr_t)] & (1L << (i & (sizeof (uintptr_t) * 8 -1))))
3696                         rb [(offset + i) / (sizeof (uintptr_t) * 8)] |= (1L << ((offset + i) & (sizeof (uintptr_t) * 8 -1)));
3697         }
3698 }
3699
3700 static void
3701 clear_reference_bitmap (guint32 offset, guint32 size)
3702 {
3703         int idx = (offset >> 24) - 1;
3704         uintptr_t *rb;
3705         rb = static_reference_bitmaps [idx];
3706         offset &= 0xffffff;
3707         offset /= sizeof (gpointer);
3708         size /= sizeof (gpointer);
3709         size += offset;
3710         /* offset is now the bitmap offset */
3711         for (; offset < size; ++offset)
3712                 rb [offset / (sizeof (uintptr_t) * 8)] &= ~(1L << (offset & (sizeof (uintptr_t) * 8 -1)));
3713 }
3714
3715 /*
3716  * The offset for a special static variable is composed of three parts:
3717  * a bit that indicates the type of static data (0:thread, 1:context),
3718  * an index in the array of chunks of memory for the thread (thread->static_data)
3719  * and an offset in that chunk of mem. This allows allocating less memory in the
3720  * common case.
3721  */
3722
3723 guint32
3724 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int max_set)
3725 {
3726         guint32 offset;
3727         if (static_type == SPECIAL_STATIC_THREAD) {
3728                 MonoThreadDomainTls *item;
3729                 mono_threads_lock ();
3730                 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3731                 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3732                 if (item) {
3733                         offset = item->offset;
3734                         g_free (item);
3735                 } else {
3736                         offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3737                 }
3738                 update_tls_reference_bitmap (offset, bitmap, max_set);
3739                 /* This can be called during startup */
3740                 if (threads != NULL)
3741                         mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3742                 mono_threads_unlock ();
3743         } else {
3744                 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3745                 mono_contexts_lock ();
3746                 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3747                 mono_contexts_unlock ();
3748                 offset |= 0x80000000;   /* Set the high bit to indicate context static data */
3749         }
3750         return offset;
3751 }
3752
3753 gpointer
3754 mono_get_special_static_data (guint32 offset)
3755 {
3756         /* The high bit means either thread (0) or static (1) data. */
3757
3758         guint32 static_type = (offset & 0x80000000);
3759         int idx;
3760
3761         offset &= 0x7fffffff;
3762         idx = (offset >> 24) - 1;
3763
3764         if (static_type == 0) {
3765                 return get_thread_static_data (mono_thread_internal_current (), offset);
3766         } else {
3767                 /* Allocate static data block under demand, since we don't have a list
3768                 // of contexts
3769                 */
3770                 MonoAppContext *context = mono_context_get ();
3771                 if (!context->static_data || !context->static_data [idx]) {
3772                         mono_contexts_lock ();
3773                         mono_alloc_static_data (&(context->static_data), offset, FALSE);
3774                         mono_contexts_unlock ();
3775                 }
3776                 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3777         }
3778 }
3779
3780 typedef struct {
3781         guint32 offset;
3782         guint32 size;
3783 } TlsOffsetSize;
3784
3785 static void
3786 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3787 {
3788         MonoInternalThread *thread = value;
3789         TlsOffsetSize *data = user;
3790         int idx = (data->offset >> 24) - 1;
3791         char *ptr;
3792
3793         if (!thread->static_data || !thread->static_data [idx])
3794                 return;
3795         ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3796         memset (ptr, 0, data->size);
3797 }
3798
3799 static void
3800 do_free_special (gpointer key, gpointer value, gpointer data)
3801 {
3802         MonoClassField *field = key;
3803         guint32 offset = GPOINTER_TO_UINT (value);
3804         guint32 static_type = (offset & 0x80000000);
3805         gint32 align;
3806         guint32 size;
3807         size = mono_type_size (field->type, &align);
3808         /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3809         if (static_type == 0) {
3810                 TlsOffsetSize data;
3811                 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3812                 data.offset = offset & 0x7fffffff;
3813                 data.size = size;
3814                 clear_reference_bitmap (data.offset, data.size);
3815                 if (threads != NULL)
3816                         mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3817                 item->offset = offset;
3818                 item->size = size;
3819
3820                 if (!mono_runtime_is_shutting_down ()) {
3821                         item->next = thread_static_info.freelist;
3822                         thread_static_info.freelist = item;
3823                 } else {
3824                         /* We could be called during shutdown after mono_thread_cleanup () is called */
3825                         g_free (item);
3826                 }
3827         } else {
3828                 /* FIXME: free context static data as well */
3829         }
3830 }
3831
3832 void
3833 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3834 {
3835         mono_threads_lock ();
3836         g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3837         mono_threads_unlock ();
3838 }
3839
3840 static MonoClassField *local_slots = NULL;
3841
3842 typedef struct {
3843         /* local tls data to get locals_slot from a thread */
3844         guint32 offset;
3845         int idx;
3846         /* index in the locals_slot array */
3847         int slot;
3848 } LocalSlotID;
3849
3850 static void
3851 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3852 {
3853         LocalSlotID *sid = user_data;
3854         MonoInternalThread *thread = (MonoInternalThread*)value;
3855         MonoArray *slots_array;
3856         /*
3857          * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3858          * it is for the right domain, so we need to check if it is allocated an initialized
3859          * for the current thread.
3860          */
3861         /*g_print ("handling thread %p\n", thread);*/
3862         if (!thread->static_data || !thread->static_data [sid->idx])
3863                 return;
3864         slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3865         if (!slots_array || sid->slot >= mono_array_length (slots_array))
3866                 return;
3867         mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3868 }
3869
3870 void
3871 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3872 {
3873         MonoDomain *domain;
3874         LocalSlotID sid;
3875         sid.slot = slot;
3876         if (thread_local) {
3877                 void *addr = NULL;
3878                 if (!local_slots) {
3879                         local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3880                         if (!local_slots) {
3881                                 g_warning ("local_slots field not found in Thread class");
3882                                 return;
3883                         }
3884                 }
3885                 domain = mono_domain_get ();
3886                 mono_domain_lock (domain);
3887                 if (domain->special_static_fields)
3888                         addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3889                 mono_domain_unlock (domain);
3890                 if (!addr)
3891                         return;
3892                 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3893                 sid.offset = GPOINTER_TO_UINT (addr);
3894                 sid.offset &= 0x7fffffff;
3895                 sid.idx = (sid.offset >> 24) - 1;
3896                 mono_threads_lock ();
3897                 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
3898                 mono_threads_unlock ();
3899         } else {
3900                 /* FIXME: clear the slot for MonoAppContexts, too */
3901         }
3902 }
3903
3904 #ifdef HOST_WIN32
3905 static void CALLBACK dummy_apc (ULONG_PTR param)
3906 {
3907 }
3908 #else
3909 static guint32 dummy_apc (gpointer param)
3910 {
3911         return 0;
3912 }
3913 #endif
3914
3915 /*
3916  * mono_thread_execute_interruption
3917  *
3918  * Performs the operation that the requested thread state requires (abort,
3919  * suspend or stop)
3920  */
3921 static MonoException* mono_thread_execute_interruption (MonoInternalThread *thread)
3922 {
3923         ensure_synch_cs_set (thread);
3924
3925         EnterCriticalSection (thread->synch_cs);
3926
3927         /* MonoThread::interruption_requested can only be changed with atomics */
3928         if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
3929                 /* this will consume pending APC calls */
3930                 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
3931                 InterlockedDecrement (&thread_interruption_requested);
3932 #ifndef HOST_WIN32
3933                 /* Clear the interrupted flag of the thread so it can wait again */
3934                 wapi_clear_interruption ();
3935 #endif
3936         }
3937
3938         if ((thread->state & ThreadState_AbortRequested) != 0) {
3939                 LeaveCriticalSection (thread->synch_cs);
3940                 if (thread->abort_exc == NULL) {
3941                         /*
3942                          * This might be racy, but it has to be called outside the lock
3943                          * since it calls managed code.
3944                          */
3945                         MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
3946                 }
3947                 return thread->abort_exc;
3948         }
3949         else if ((thread->state & ThreadState_SuspendRequested) != 0) {
3950                 thread->state &= ~ThreadState_SuspendRequested;
3951                 thread->state |= ThreadState_Suspended;
3952                 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3953                 if (thread->suspend_event == NULL) {
3954                         LeaveCriticalSection (thread->synch_cs);
3955                         return(NULL);
3956                 }
3957                 if (thread->suspended_event)
3958                         SetEvent (thread->suspended_event);
3959
3960                 LeaveCriticalSection (thread->synch_cs);
3961
3962                 if (shutting_down) {
3963                         /* After we left the lock, the runtime might shut down so everything becomes invalid */
3964                         for (;;)
3965                                 Sleep (1000);
3966                 }
3967
3968                 WaitForSingleObject (thread->suspend_event, INFINITE);
3969
3970                 EnterCriticalSection (thread->synch_cs);
3971
3972                 CloseHandle (thread->suspend_event);
3973                 thread->suspend_event = NULL;
3974                 thread->state &= ~ThreadState_Suspended;
3975
3976                 /* The thread that requested the resume will have replaced this event
3977                  * and will be waiting for it
3978                  */
3979                 SetEvent (thread->resume_event);
3980
3981                 LeaveCriticalSection (thread->synch_cs);
3982
3983                 return NULL;
3984         }
3985         else if ((thread->state & ThreadState_StopRequested) != 0) {
3986                 /* FIXME: do this through the JIT? */
3987
3988                 LeaveCriticalSection (thread->synch_cs);
3989
3990                 mono_thread_exit ();
3991                 return NULL;
3992         } else if (thread->thread_interrupt_requested) {
3993
3994                 thread->thread_interrupt_requested = FALSE;
3995                 LeaveCriticalSection (thread->synch_cs);
3996
3997                 return(mono_get_exception_thread_interrupted ());
3998         }
3999
4000         LeaveCriticalSection (thread->synch_cs);
4001
4002         return NULL;
4003 }
4004
4005 /*
4006  * mono_thread_request_interruption
4007  *
4008  * A signal handler can call this method to request the interruption of a
4009  * thread. The result of the interruption will depend on the current state of
4010  * the thread. If the result is an exception that needs to be throw, it is
4011  * provided as return value.
4012  */
4013 MonoException*
4014 mono_thread_request_interruption (gboolean running_managed)
4015 {
4016         MonoInternalThread *thread = mono_thread_internal_current ();
4017
4018         /* The thread may already be stopping */
4019         if (thread == NULL)
4020                 return NULL;
4021
4022 #ifdef HOST_WIN32
4023         if (thread->interrupt_on_stop &&
4024                 thread->state & ThreadState_StopRequested &&
4025                 thread->state & ThreadState_Background)
4026                 ExitThread (1);
4027 #endif
4028
4029         if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4030                 return NULL;
4031
4032         if (!running_managed || is_running_protected_wrapper ()) {
4033                 /* Can't stop while in unmanaged code. Increase the global interruption
4034                    request count. When exiting the unmanaged method the count will be
4035                    checked and the thread will be interrupted. */
4036
4037                 InterlockedIncrement (&thread_interruption_requested);
4038
4039                 if (mono_thread_notify_pending_exc_fn && !running_managed)
4040                         /* The JIT will notify the thread about the interruption */
4041                         /* This shouldn't take any locks */
4042                         mono_thread_notify_pending_exc_fn ();
4043
4044                 /* this will awake the thread if it is in WaitForSingleObject
4045                    or similar */
4046                 /* Our implementation of this function ignores the func argument */
4047                 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
4048                 return NULL;
4049         }
4050         else {
4051                 return mono_thread_execute_interruption (thread);
4052         }
4053 }
4054
4055 /*This function should be called by a thread after it has exited all of
4056  * its handle blocks at interruption time.*/
4057 MonoException*
4058 mono_thread_resume_interruption (void)
4059 {
4060         MonoInternalThread *thread = mono_thread_internal_current ();
4061         gboolean still_aborting;
4062
4063         /* The thread may already be stopping */
4064         if (thread == NULL)
4065                 return NULL;
4066
4067         ensure_synch_cs_set (thread);
4068         EnterCriticalSection (thread->synch_cs);
4069         still_aborting = (thread->state & ThreadState_AbortRequested) != 0;
4070         LeaveCriticalSection (thread->synch_cs);
4071
4072         /*This can happen if the protected block called Thread::ResetAbort*/
4073         if (!still_aborting)
4074                 return FALSE;
4075
4076         if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4077                 return NULL;
4078         InterlockedIncrement (&thread_interruption_requested);
4079
4080 #ifndef HOST_WIN32
4081         wapi_self_interrupt ();
4082 #endif
4083         return mono_thread_execute_interruption (thread);
4084 }
4085
4086 gboolean mono_thread_interruption_requested ()
4087 {
4088         if (thread_interruption_requested) {
4089                 MonoInternalThread *thread = mono_thread_internal_current ();
4090                 /* The thread may already be stopping */
4091                 if (thread != NULL)
4092                         return (thread->interruption_requested);
4093         }
4094         return FALSE;
4095 }
4096
4097 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4098 {
4099         MonoInternalThread *thread = mono_thread_internal_current ();
4100
4101         /* The thread may already be stopping */
4102         if (thread == NULL)
4103                 return;
4104
4105         mono_debugger_check_interruption ();
4106
4107         if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4108                 MonoException* exc = mono_thread_execute_interruption (thread);
4109                 if (exc) mono_raise_exception (exc);
4110         }
4111 }
4112
4113 /*
4114  * Performs the interruption of the current thread, if one has been requested,
4115  * and the thread is not running a protected wrapper.
4116  */
4117 void mono_thread_interruption_checkpoint ()
4118 {
4119         mono_thread_interruption_checkpoint_request (FALSE);
4120 }
4121
4122 /*
4123  * Performs the interruption of the current thread, if one has been requested.
4124  */
4125 void mono_thread_force_interruption_checkpoint ()
4126 {
4127         mono_thread_interruption_checkpoint_request (TRUE);
4128 }
4129
4130 /*
4131  * mono_thread_get_and_clear_pending_exception:
4132  *
4133  *   Return any pending exceptions for the current thread and clear it as a side effect.
4134  */
4135 MonoException*
4136 mono_thread_get_and_clear_pending_exception (void)
4137 {
4138         MonoInternalThread *thread = mono_thread_internal_current ();
4139
4140         /* The thread may already be stopping */
4141         if (thread == NULL)
4142                 return NULL;
4143
4144         if (thread->interruption_requested && !is_running_protected_wrapper ()) {
4145                 return mono_thread_execute_interruption (thread);
4146         }
4147
4148         if (thread->pending_exception) {
4149                 MonoException *exc = thread->pending_exception;
4150
4151                 thread->pending_exception = NULL;
4152                 return exc;
4153         }
4154
4155         return NULL;
4156 }
4157
4158 /*
4159  * mono_set_pending_exception:
4160  *
4161  *   Set the pending exception of the current thread to EXC. On platforms which
4162  * support it, the exception will be thrown when execution returns to managed code.
4163  * On other platforms, this function is equivalent to mono_raise_exception ().
4164  * Internal calls which report exceptions using this function instead of
4165  * raise_exception () might be called by JITted code using a more efficient calling
4166  * convention.
4167  */
4168 void
4169 mono_set_pending_exception (MonoException *exc)
4170 {
4171         MonoInternalThread *thread = mono_thread_internal_current ();
4172
4173         /* The thread may already be stopping */
4174         if (thread == NULL)
4175                 return;
4176
4177         if (mono_thread_notify_pending_exc_fn) {
4178                 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4179
4180                 mono_thread_notify_pending_exc_fn ();
4181         } else {
4182                 /* No way to notify the JIT about the exception, have to throw it now */
4183                 mono_raise_exception (exc);
4184         }
4185 }
4186
4187 /**
4188  * mono_thread_interruption_request_flag:
4189  *
4190  * Returns the address of a flag that will be non-zero if an interruption has
4191  * been requested for a thread. The thread to interrupt may not be the current
4192  * thread, so an additional call to mono_thread_interruption_requested() or
4193  * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4194  * zero.
4195  */
4196 gint32* mono_thread_interruption_request_flag ()
4197 {
4198         return &thread_interruption_requested;
4199 }
4200
4201 void
4202 mono_thread_init_apartment_state (void)
4203 {
4204 #ifdef HOST_WIN32
4205         MonoInternalThread* thread = mono_thread_internal_current ();
4206
4207         /* Positive return value indicates success, either
4208          * S_OK if this is first CoInitialize call, or
4209          * S_FALSE if CoInitialize already called, but with same
4210          * threading model. A negative value indicates failure,
4211          * probably due to trying to change the threading model.
4212          */
4213         if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4214                         ? COINIT_APARTMENTTHREADED
4215                         : COINIT_MULTITHREADED) < 0) {
4216                 thread->apartment_state = ThreadApartmentState_Unknown;
4217         }
4218 #endif
4219 }
4220
4221 void
4222 mono_thread_cleanup_apartment_state (void)
4223 {
4224 #ifdef HOST_WIN32
4225         MonoInternalThread* thread = mono_thread_internal_current ();
4226
4227         if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4228                 CoUninitialize ();
4229         }
4230 #endif
4231 }
4232
4233 void
4234 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4235 {
4236         ensure_synch_cs_set (thread);
4237
4238         EnterCriticalSection (thread->synch_cs);
4239         thread->state |= state;
4240         LeaveCriticalSection (thread->synch_cs);
4241 }
4242
4243 void
4244 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4245 {
4246         ensure_synch_cs_set (thread);
4247
4248         EnterCriticalSection (thread->synch_cs);
4249         thread->state &= ~state;
4250         LeaveCriticalSection (thread->synch_cs);
4251 }
4252
4253 gboolean
4254 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4255 {
4256         gboolean ret = FALSE;
4257
4258         ensure_synch_cs_set (thread);
4259
4260         EnterCriticalSection (thread->synch_cs);
4261
4262         if ((thread->state & test) != 0) {
4263                 ret = TRUE;
4264         }
4265
4266         LeaveCriticalSection (thread->synch_cs);
4267
4268         return ret;
4269 }
4270
4271 static MonoClassField *execution_context_field;
4272
4273 static MonoObject**
4274 get_execution_context_addr (void)
4275 {
4276         MonoDomain *domain = mono_domain_get ();
4277         guint32 offset;
4278
4279         if (!execution_context_field) {
4280                 execution_context_field = mono_class_get_field_from_name (mono_defaults.thread_class,
4281                                 "_ec");
4282                 g_assert (execution_context_field);
4283         }
4284
4285         g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4286
4287         mono_domain_lock (domain);
4288         offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, execution_context_field));
4289         mono_domain_unlock (domain);
4290         g_assert (offset);
4291
4292         return (MonoObject**) mono_get_special_static_data (offset);
4293 }
4294
4295 MonoObject*
4296 mono_thread_get_execution_context (void)
4297 {
4298         return *get_execution_context_addr ();
4299 }
4300
4301 void
4302 mono_thread_set_execution_context (MonoObject *ec)
4303 {
4304         *get_execution_context_addr () = ec;
4305 }
4306
4307 static gboolean has_tls_get = FALSE;
4308
4309 void
4310 mono_runtime_set_has_tls_get (gboolean val)
4311 {
4312         has_tls_get = val;
4313 }
4314
4315 gboolean
4316 mono_runtime_has_tls_get (void)
4317 {
4318         return has_tls_get;
4319 }