mono/metadata/threads.c

   1 /*
   2  * threads.c: Thread support internal calls
   3  *
   4  * Author:
   5  *      Dick Porter (dick@ximian.com)
   6  *      Paolo Molaro (lupus@ximian.com)
   7  *      Patrik Torstensson (patrik.torstensson@labs2.com)
   8  *
   9  * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
  10  * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
  11  */
  12
  13 #include <config.h>
  14
  15 #include <glib.h>
  16 #include <signal.h>
  17 #include <string.h>
  18
  19 #include <mono/metadata/object.h>
  20 #include <mono/metadata/domain-internals.h>
  21 #include <mono/metadata/profiler-private.h>
  22 #include <mono/metadata/threads.h>
  23 #include <mono/metadata/threadpool.h>
  24 #include <mono/metadata/threads-types.h>
  25 #include <mono/metadata/exception.h>
  26 #include <mono/metadata/environment.h>
  27 #include <mono/metadata/monitor.h>
  28 #include <mono/metadata/gc-internal.h>
  29 #include <mono/metadata/marshal.h>
  30 #include <mono/io-layer/io-layer.h>
  31 #ifndef PLATFORM_WIN32
  32 #include <mono/io-layer/threads.h>
  33 #endif
  34 #include <mono/metadata/object-internals.h>
  35 #include <mono/metadata/mono-debug-debugger.h>
  36 #include <mono/utils/mono-compiler.h>
  37 #include <mono/utils/mono-mmap.h>
  38 #include <mono/utils/mono-membar.h>
  39 #include <mono/utils/mono-time.h>
  40
  41 #include <mono/metadata/gc-internal.h>
  42
  43 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
  44 #define THREAD_DEBUG(a)
  45 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
  46 #define THREAD_WAIT_DEBUG(a)
  47 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
  48 #define LIBGC_DEBUG(a)
  49
  50 /* Provide this for systems with glib < 2.6 */
  51 #ifndef G_GSIZE_FORMAT
  52 #   if GLIB_SIZEOF_LONG == 8
  53 #       define G_GSIZE_FORMAT "lu"
  54 #   else
  55 #       define G_GSIZE_FORMAT "u"
  56 #   endif
  57 #endif
  58
  59 struct StartInfo
  60 {
  61         guint32 (*func)(void *);
  62         MonoThread *obj;
  63         MonoObject *delegate;
  64         void *start_arg;
  65         MonoDomain *domain;
  66 };
  67
  68 typedef union {
  69         gint32 ival;
  70         gfloat fval;
  71 } IntFloatUnion;
  72
  73 typedef union {
  74         gint64 ival;
  75         gdouble fval;
  76 } LongDoubleUnion;
  77
  78 typedef struct _MonoThreadDomainTls MonoThreadDomainTls;
  79 struct _MonoThreadDomainTls {
  80         MonoThreadDomainTls *next;
  81         guint32 offset;
  82         guint32 size;
  83 };
  84
  85 typedef struct {
  86         int idx;
  87         int offset;
  88         MonoThreadDomainTls *freelist;
  89 } StaticDataInfo;
  90
  91 typedef struct {
  92         gpointer p;
  93         MonoHazardousFreeFunc free_func;
  94 } DelayedFreeItem;
  95
  96 /* Number of cached culture objects in the MonoThread->cached_culture_info array
  97  * (per-type): we use the first NUM entries for CultureInfo and the last for
  98  * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
  99  */
 100 #define NUM_CACHED_CULTURES 4
 101 #define CULTURES_START_IDX 0
 102 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
 103
 104 /* Controls access to the 'threads' hash table */
 105 #define mono_threads_lock() EnterCriticalSection (&threads_mutex)
 106 #define mono_threads_unlock() LeaveCriticalSection (&threads_mutex)
 107 static CRITICAL_SECTION threads_mutex;
 108
 109 /* Controls access to context static data */
 110 #define mono_contexts_lock() EnterCriticalSection (&contexts_mutex)
 111 #define mono_contexts_unlock() LeaveCriticalSection (&contexts_mutex)
 112 static CRITICAL_SECTION contexts_mutex;
 113
 114 /* Holds current status of static data heap */
 115 static StaticDataInfo thread_static_info;
 116 static StaticDataInfo context_static_info;
 117
 118 /* The hash of existing threads (key is thread ID) that need joining
 119  * before exit
 120  */
 121 static MonoGHashTable *threads=NULL;
 122
 123 /*
 124  * Threads which are starting up and they are not in the 'threads' hash yet.
 125  * When handle_store is called for a thread, it will be removed from this hash table.
 126  * Protected by mono_threads_lock ().
 127  */
 128 static MonoGHashTable *threads_starting_up = NULL;
 129
 130 /* Maps a MonoThread to its start argument */
 131 /* Protected by mono_threads_lock () */
 132 static MonoGHashTable *thread_start_args = NULL;
 133
 134 /* The TLS key that holds the MonoObject assigned to each thread */
 135 static guint32 current_object_key = -1;
 136
 137 #ifdef HAVE_KW_THREAD
 138 /* we need to use both the Tls* functions and __thread because
 139  * the gc needs to see all the threads
 140  */
 141 static __thread MonoThread * tls_current_object MONO_TLS_FAST;
 142 #define SET_CURRENT_OBJECT(x) do { \
 143         tls_current_object = x; \
 144         TlsSetValue (current_object_key, x); \
 145 } while (FALSE)
 146 #define GET_CURRENT_OBJECT() tls_current_object
 147 #else
 148 #define SET_CURRENT_OBJECT(x) TlsSetValue (current_object_key, x)
 149 #define GET_CURRENT_OBJECT() (MonoThread*) TlsGetValue (current_object_key)
 150 #endif
 151
 152 /* function called at thread start */
 153 static MonoThreadStartCB mono_thread_start_cb = NULL;
 154
 155 /* function called at thread attach */
 156 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
 157
 158 /* function called at thread cleanup */
 159 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
 160
 161 /* function called to notify the runtime about a pending exception on the current thread */
 162 static MonoThreadNotifyPendingExcFunc mono_thread_notify_pending_exc_fn = NULL;
 163
 164 /* The default stack size for each thread */
 165 static guint32 default_stacksize = 0;
 166 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
 167
 168 static void thread_adjust_static_data (MonoThread *thread);
 169 static void mono_init_static_data_info (StaticDataInfo *static_data);
 170 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
 171 static gboolean mono_thread_resume (MonoThread* thread);
 172 static void mono_thread_start (MonoThread *thread);
 173 static void signal_thread_state_change (MonoThread *thread);
 174
 175 static MonoException* mono_thread_execute_interruption (MonoThread *thread);
 176
 177 /* Spin lock for InterlockedXXX 64 bit functions */
 178 #define mono_interlocked_lock() EnterCriticalSection (&interlocked_mutex)
 179 #define mono_interlocked_unlock() LeaveCriticalSection (&interlocked_mutex)
 180 static CRITICAL_SECTION interlocked_mutex;
 181
 182 /* global count of thread interruptions requested */
 183 static gint32 thread_interruption_requested = 0;
 184
 185 /* Event signaled when a thread changes its background mode */
 186 static HANDLE background_change_event;
 187
 188 /* The table for small ID assignment */
 189 static CRITICAL_SECTION small_id_mutex;
 190 static int small_id_table_size = 0;
 191 static int small_id_next = 0;
 192 static int highest_small_id = -1;
 193 static MonoThread **small_id_table = NULL;
 194
 195 /* The hazard table */
 196 #define HAZARD_TABLE_MAX_SIZE   16384 /* There cannot be more threads than this number. */
 197 static volatile int hazard_table_size = 0;
 198 static MonoThreadHazardPointers * volatile hazard_table = NULL;
 199
 200 /* The table where we keep pointers to blocks to be freed but that
 201    have to wait because they're guarded by a hazard pointer. */
 202 static CRITICAL_SECTION delayed_free_table_mutex;
 203 static GArray *delayed_free_table = NULL;
 204
 205 static gboolean shutting_down = FALSE;
 206
 207 guint32
 208 mono_thread_get_tls_key (void)
 209 {
 210         return current_object_key;
 211 }
 212
 213 gint32
 214 mono_thread_get_tls_offset (void)
 215 {
 216         int offset;
 217         MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
 218         return offset;
 219 }
 220
 221 /* handle_store() and handle_remove() manage the array of threads that
 222  * still need to be waited for when the main thread exits.
 223  *
 224  * If handle_store() returns FALSE the thread must not be started
 225  * because Mono is shutting down.
 226  */
 227 static gboolean handle_store(MonoThread *thread)
 228 {
 229         mono_threads_lock ();
 230
 231         THREAD_DEBUG (g_message ("%s: thread %p ID %"G_GSIZE_FORMAT, __func__, thread, (gsize)thread->tid));
 232
 233         if (threads_starting_up)
 234                 mono_g_hash_table_remove (threads_starting_up, thread);
 235
 236         if (shutting_down) {
 237                 mono_threads_unlock ();
 238                 return FALSE;
 239         }
 240
 241         if(threads==NULL) {
 242                 MONO_GC_REGISTER_ROOT (threads);
 243                 threads=mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC);
 244         }
 245
 246         /* We don't need to duplicate thread->handle, because it is
 247          * only closed when the thread object is finalized by the GC.
 248          */
 249         mono_g_hash_table_insert(threads, (gpointer)(gsize)(thread->tid),
 250                                  thread);
 251
 252         mono_threads_unlock ();
 253
 254         return TRUE;
 255 }
 256
 257 static gboolean handle_remove(MonoThread *thread)
 258 {
 259         gboolean ret;
 260         gsize tid = thread->tid;
 261
 262         THREAD_DEBUG (g_message ("%s: thread ID %"G_GSIZE_FORMAT, __func__, tid));
 263
 264         mono_threads_lock ();
 265
 266         if (threads) {
 267                 /* We have to check whether the thread object for the
 268                  * tid is still the same in the table because the
 269                  * thread might have been destroyed and the tid reused
 270                  * in the meantime, in which case the tid would be in
 271                  * the table, but with another thread object.
 272                  */
 273                 if (mono_g_hash_table_lookup (threads, (gpointer)tid) == thread) {
 274                         mono_g_hash_table_remove (threads, (gpointer)tid);
 275                         ret = TRUE;
 276                 } else {
 277                         ret = FALSE;
 278                 }
 279         }
 280         else
 281                 ret = FALSE;
 282
 283         mono_threads_unlock ();
 284
 285         /* Don't close the handle here, wait for the object finalizer
 286          * to do it. Otherwise, the following race condition applies:
 287          *
 288          * 1) Thread exits (and handle_remove() closes the handle)
 289          *
 290          * 2) Some other handle is reassigned the same slot
 291          *
 292          * 3) Another thread tries to join the first thread, and
 293          * blocks waiting for the reassigned handle to be signalled
 294          * (which might never happen).  This is possible, because the
 295          * thread calling Join() still has a reference to the first
 296          * thread's object.
 297          */
 298         return ret;
 299 }
 300
 301 /*
 302  * Allocate a small thread id.
 303  *
 304  * FIXME: The biggest part of this function is very similar to
 305  * domain_id_alloc() in domain.c and should be merged.
 306  */
 307 static int
 308 small_id_alloc (MonoThread *thread)
 309 {
 310         int id = -1, i;
 311
 312         EnterCriticalSection (&small_id_mutex);
 313
 314         if (!small_id_table) {
 315                 small_id_table_size = 2;
 316                 small_id_table = mono_gc_alloc_fixed (small_id_table_size * sizeof (MonoThread*), NULL);
 317         }
 318         for (i = small_id_next; i < small_id_table_size; ++i) {
 319                 if (!small_id_table [i]) {
 320                         id = i;
 321                         break;
 322                 }
 323         }
 324         if (id == -1) {
 325                 for (i = 0; i < small_id_next; ++i) {
 326                         if (!small_id_table [i]) {
 327                                 id = i;
 328                                 break;
 329                         }
 330                 }
 331         }
 332         if (id == -1) {
 333                 MonoThread **new_table;
 334                 int new_size = small_id_table_size * 2;
 335                 if (new_size >= (1 << 16))
 336                         g_assert_not_reached ();
 337                 id = small_id_table_size;
 338                 new_table = mono_gc_alloc_fixed (new_size * sizeof (MonoThread*), NULL);
 339                 memcpy (new_table, small_id_table, small_id_table_size * sizeof (void*));
 340                 mono_gc_free_fixed (small_id_table);
 341                 small_id_table = new_table;
 342                 small_id_table_size = new_size;
 343         }
 344         thread->small_id = id;
 345         g_assert (small_id_table [id] == NULL);
 346         small_id_table [id] = thread;
 347         small_id_next++;
 348         if (small_id_next > small_id_table_size)
 349                 small_id_next = 0;
 350
 351         if (id >= hazard_table_size) {
 352                 gpointer page_addr;
 353                 int pagesize = mono_pagesize ();
 354                 int num_pages = (hazard_table_size * sizeof (MonoThreadHazardPointers) + pagesize - 1) / pagesize;
 355
 356                 if (hazard_table == NULL) {
 357                         hazard_table = mono_valloc (NULL,
 358                                 sizeof (MonoThreadHazardPointers) * HAZARD_TABLE_MAX_SIZE,
 359                                 MONO_MMAP_NONE);
 360                 }
 361
 362                 g_assert (hazard_table != NULL);
 363                 page_addr = (guint8*)hazard_table + num_pages * pagesize;
 364
 365                 g_assert (id < HAZARD_TABLE_MAX_SIZE);
 366
 367                 mono_mprotect (page_addr, pagesize, MONO_MMAP_READ | MONO_MMAP_WRITE);
 368
 369                 ++num_pages;
 370                 hazard_table_size = num_pages * pagesize / sizeof (MonoThreadHazardPointers);
 371
 372                 g_assert (id < hazard_table_size);
 373
 374                 hazard_table [id].hazard_pointers [0] = NULL;
 375                 hazard_table [id].hazard_pointers [1] = NULL;
 376         }
 377
 378         if (id > highest_small_id) {
 379                 highest_small_id = id;
 380                 mono_memory_write_barrier ();
 381         }
 382
 383         LeaveCriticalSection (&small_id_mutex);
 384
 385         return id;
 386 }
 387
 388 static void
 389 small_id_free (int id)
 390 {
 391         g_assert (id >= 0 && id < small_id_table_size);
 392         g_assert (small_id_table [id] != NULL);
 393
 394         small_id_table [id] = NULL;
 395 }
 396
 397 static gboolean
 398 is_pointer_hazardous (gpointer p)
 399 {
 400         int i;
 401         int highest = highest_small_id;
 402
 403         g_assert (highest < hazard_table_size);
 404
 405         for (i = 0; i <= highest; ++i) {
 406                 if (hazard_table [i].hazard_pointers [0] == p
 407                                 || hazard_table [i].hazard_pointers [1] == p)
 408                         return TRUE;
 409         }
 410
 411         return FALSE;
 412 }
 413
 414 MonoThreadHazardPointers*
 415 mono_hazard_pointer_get (void)
 416 {
 417         MonoThread *current_thread = mono_thread_current ();
 418
 419         if (!(current_thread && current_thread->small_id >= 0)) {
 420                 static MonoThreadHazardPointers emerg_hazard_table;
 421                 g_warning ("Thread %p may have been prematurely finalized", current_thread);
 422                 return &emerg_hazard_table;
 423         }
 424
 425         return &hazard_table [current_thread->small_id];
 426 }
 427
 428 static void
 429 try_free_delayed_free_item (int index)
 430 {
 431         if (delayed_free_table->len > index) {
 432                 DelayedFreeItem item = { NULL, NULL };
 433
 434                 EnterCriticalSection (&delayed_free_table_mutex);
 435                 /* We have to check the length again because another
 436                    thread might have freed an item before we acquired
 437                    the lock. */
 438                 if (delayed_free_table->len > index) {
 439                         item = g_array_index (delayed_free_table, DelayedFreeItem, index);
 440
 441                         if (!is_pointer_hazardous (item.p))
 442                                 g_array_remove_index_fast (delayed_free_table, index);
 443                         else
 444                                 item.p = NULL;
 445                 }
 446                 LeaveCriticalSection (&delayed_free_table_mutex);
 447
 448                 if (item.p != NULL)
 449                         item.free_func (item.p);
 450         }
 451 }
 452
 453 void
 454 mono_thread_hazardous_free_or_queue (gpointer p, MonoHazardousFreeFunc free_func)
 455 {
 456         int i;
 457
 458         /* First try to free a few entries in the delayed free
 459            table. */
 460         for (i = 2; i >= 0; --i)
 461                 try_free_delayed_free_item (i);
 462
 463         /* Now see if the pointer we're freeing is hazardous.  If it
 464            isn't, free it.  Otherwise put it in the delay list. */
 465         if (is_pointer_hazardous (p)) {
 466                 DelayedFreeItem item = { p, free_func };
 467
 468                 ++mono_stats.hazardous_pointer_count;
 469
 470                 EnterCriticalSection (&delayed_free_table_mutex);
 471                 g_array_append_val (delayed_free_table, item);
 472                 LeaveCriticalSection (&delayed_free_table_mutex);
 473         } else
 474                 free_func (p);
 475 }
 476
 477 void
 478 mono_thread_hazardous_try_free_all (void)
 479 {
 480         int len;
 481         int i;
 482
 483         if (!delayed_free_table)
 484                 return;
 485
 486         len = delayed_free_table->len;
 487
 488         for (i = len - 1; i >= 0; --i)
 489                 try_free_delayed_free_item (i);
 490 }
 491
 492 static void ensure_synch_cs_set (MonoThread *thread)
 493 {
 494         CRITICAL_SECTION *synch_cs;
 495
 496         if (thread->synch_cs != NULL) {
 497                 return;
 498         }
 499
 500         synch_cs = g_new0 (CRITICAL_SECTION, 1);
 501         InitializeCriticalSection (synch_cs);
 502
 503         if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
 504                                                synch_cs, NULL) != NULL) {
 505                 /* Another thread must have installed this CS */
 506                 DeleteCriticalSection (synch_cs);
 507                 g_free (synch_cs);
 508         }
 509 }
 510
 511 /*
 512  * NOTE: this function can be called also for threads different from the current one:
 513  * make sure no code called from it will ever assume it is run on the thread that is
 514  * getting cleaned up.
 515  */
 516 static void thread_cleanup (MonoThread *thread)
 517 {
 518         g_assert (thread != NULL);
 519
 520         if (thread->abort_state_handle) {
 521                 g_assert (thread->abort_exc);
 522                 mono_gchandle_free (thread->abort_state_handle);
 523                 thread->abort_state_handle = 0;
 524         }
 525         thread->abort_exc = NULL;
 526         thread->current_appcontext = NULL;
 527
 528         /*
 529          * This is necessary because otherwise we might have
 530          * cross-domain references which will not get cleaned up when
 531          * the target domain is unloaded.
 532          */
 533         if (thread->cached_culture_info) {
 534                 int i;
 535                 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
 536                         mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
 537         }
 538
 539         /* if the thread is not in the hash it has been removed already */
 540         if (!handle_remove (thread))
 541                 return;
 542         mono_release_type_locks (thread);
 543
 544         EnterCriticalSection (thread->synch_cs);
 545
 546         thread->state |= ThreadState_Stopped;
 547         thread->state &= ~ThreadState_Background;
 548
 549         LeaveCriticalSection (thread->synch_cs);
 550
 551         mono_profiler_thread_end (thread->tid);
 552
 553         if (thread == mono_thread_current ())
 554                 mono_thread_pop_appdomain_ref ();
 555
 556         if (thread->serialized_culture_info)
 557                 g_free (thread->serialized_culture_info);
 558
 559         if (thread->serialized_ui_culture_info)
 560                 g_free (thread->serialized_ui_culture_info);
 561
 562         g_free (thread->name);
 563
 564         thread->cached_culture_info = NULL;
 565
 566         mono_gc_free_fixed (thread->static_data);
 567         thread->static_data = NULL;
 568
 569         if (mono_thread_cleanup_fn)
 570                 mono_thread_cleanup_fn (thread);
 571
 572         small_id_free (thread->small_id);
 573         thread->small_id = -2;
 574 }
 575
 576 static guint32 WINAPI start_wrapper(void *data)
 577 {
 578         struct StartInfo *start_info=(struct StartInfo *)data;
 579         guint32 (*start_func)(void *);
 580         void *start_arg;
 581         gsize tid;
 582         MonoThread *thread=start_info->obj;
 583         MonoObject *start_delegate = start_info->delegate;
 584
 585         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, GetCurrentThreadId ()));
 586
 587         /* We can be sure start_info->obj->tid and
 588          * start_info->obj->handle have been set, because the thread
 589          * was created suspended, and these values were set before the
 590          * thread resumed
 591          */
 592
 593         tid=thread->tid;
 594
 595         SET_CURRENT_OBJECT (thread);
 596
 597         mono_monitor_init_tls ();
 598
 599         /* Every thread references the appdomain which created it */
 600         mono_thread_push_appdomain_ref (start_info->domain);
 601
 602         if (!mono_domain_set (start_info->domain, FALSE)) {
 603                 /* No point in raising an appdomain_unloaded exception here */
 604                 /* FIXME: Cleanup here */
 605                 mono_thread_pop_appdomain_ref ();
 606                 return 0;
 607         }
 608
 609         start_func = start_info->func;
 610         start_arg = start_info->start_arg;
 611
 612         /* This MUST be called before any managed code can be
 613          * executed, as it calls the callback function that (for the
 614          * jit) sets the lmf marker.
 615          */
 616         mono_thread_new_init (tid, &tid, start_func);
 617         thread->stack_ptr = &tid;
 618
 619         LIBGC_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT",%d) Setting thread stack to %p", __func__, GetCurrentThreadId (), getpid (), thread->stack_ptr));
 620
 621         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
 622
 623         /* On 2.0 profile (and higher), set explicitly since state might have been
 624            Unknown */
 625         if (mono_framework_version () != 1) {
 626                 if (thread->apartment_state == ThreadApartmentState_Unknown)
 627                         thread->apartment_state = ThreadApartmentState_MTA;
 628         }
 629
 630         mono_thread_init_apartment_state ();
 631
 632         if(thread->start_notify!=NULL) {
 633                 /* Let the thread that called Start() know we're
 634                  * ready
 635                  */
 636                 ReleaseSemaphore (thread->start_notify, 1, NULL);
 637         }
 638
 639         mono_threads_lock ();
 640         mono_g_hash_table_remove (thread_start_args, thread);
 641         mono_threads_unlock ();
 642
 643         g_free (start_info);
 644
 645         thread_adjust_static_data (thread);
 646 #ifdef DEBUG
 647         g_message ("%s: start_wrapper for %"G_GSIZE_FORMAT, __func__,
 648                    thread->tid);
 649 #endif
 650
 651         mono_thread_set_execution_context (thread->ec_to_set);
 652
 653         /*
 654          * Call this after calling start_notify, since the profiler callback might want
 655          * to lock the thread, and the lock is held by thread_start () which waits for
 656          * start_notify.
 657          */
 658         mono_profiler_thread_start (tid);
 659
 660         /* start_func is set only for unmanaged start functions */
 661         if (start_func) {
 662                 start_func (start_arg);
 663         } else {
 664                 void *args [1];
 665                 g_assert (start_delegate != NULL);
 666                 args [0] = start_arg;
 667                 /* we may want to handle the exception here. See comment below on unhandled exceptions */
 668                 mono_runtime_delegate_invoke (start_delegate, args, NULL);
 669         }
 670
 671         /* If the thread calls ExitThread at all, this remaining code
 672          * will not be executed, but the main thread will eventually
 673          * call thread_cleanup() on this thread's behalf.
 674          */
 675
 676         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, GetCurrentThreadId ()));
 677
 678         thread_cleanup (thread);
 679
 680         /* Do any cleanup needed for apartment state. This
 681          * cannot be done in thread_cleanup since thread_cleanup could be
 682          * called for a thread other than the current thread.
 683          * mono_thread_cleanup_apartment_state cleans up apartment
 684          * for the current thead */
 685         mono_thread_cleanup_apartment_state ();
 686
 687         /* Remove the reference to the thread object in the TLS data,
 688          * so the thread object can be finalized.  This won't be
 689          * reached if the thread threw an uncaught exception, so those
 690          * thread handles will stay referenced :-( (This is due to
 691          * missing support for scanning thread-specific data in the
 692          * Boehm GC - the io-layer keeps a GC-visible hash of pointers
 693          * to TLS data.)
 694          */
 695         SET_CURRENT_OBJECT (NULL);
 696
 697         return(0);
 698 }
 699
 700 void mono_thread_new_init (gsize tid, gpointer stack_start, gpointer func)
 701 {
 702         if (mono_thread_start_cb) {
 703                 mono_thread_start_cb (tid, stack_start, func);
 704         }
 705 }
 706
 707 void mono_threads_set_default_stacksize (guint32 stacksize)
 708 {
 709         default_stacksize = stacksize;
 710 }
 711
 712 guint32 mono_threads_get_default_stacksize (void)
 713 {
 714         return default_stacksize;
 715 }
 716
 717 /*
 718  * mono_create_thread:
 719  *
 720  *   This is a wrapper around CreateThread which handles differences in the type of
 721  * the the 'tid' argument.
 722  */
 723 gpointer mono_create_thread (WapiSecurityAttributes *security,
 724                                                          guint32 stacksize, WapiThreadStart start,
 725                                                          gpointer param, guint32 create, gsize *tid)
 726 {
 727         gpointer res;
 728
 729 #ifdef PLATFORM_WIN32
 730         DWORD real_tid;
 731
 732         res = CreateThread (security, stacksize, start, param, create, &real_tid);
 733         if (tid)
 734                 *tid = real_tid;
 735 #else
 736         res = CreateThread (security, stacksize, start, param, create, tid);
 737 #endif
 738
 739         return res;
 740 }
 741
 742 /*
 743  * The thread start argument may be an object reference, and there is
 744  * no ref to keep it alive when the new thread is started but not yet
 745  * registered with the collector. So we store it in a GC tracked hash
 746  * table.
 747  *
 748  * LOCKING: Assumes the threads lock is held.
 749  */
 750 static void
 751 register_thread_start_argument (MonoThread *thread, struct StartInfo *start_info)
 752 {
 753         if (thread_start_args == NULL) {
 754                 MONO_GC_REGISTER_ROOT (thread_start_args);
 755                 thread_start_args = mono_g_hash_table_new (NULL, NULL);
 756         }
 757         mono_g_hash_table_insert (thread_start_args, thread, start_info->start_arg);
 758 }
 759
 760 MonoThread* mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread)
 761 {
 762         MonoThread *thread;
 763         HANDLE thread_handle;
 764         struct StartInfo *start_info;
 765         gsize tid;
 766
 767         thread=(MonoThread *)mono_object_new (domain,
 768                                               mono_defaults.thread_class);
 769
 770         start_info=g_new0 (struct StartInfo, 1);
 771         start_info->func = func;
 772         start_info->obj = thread;
 773         start_info->domain = domain;
 774         start_info->start_arg = arg;
 775
 776         mono_threads_lock ();
 777         if (shutting_down) {
 778                 mono_threads_unlock ();
 779                 g_free (start_info);
 780                 return NULL;
 781         }
 782         if (threads_starting_up == NULL) {
 783                 MONO_GC_REGISTER_ROOT (threads_starting_up);
 784                 threads_starting_up = mono_g_hash_table_new (NULL, NULL);
 785         }
 786
 787         register_thread_start_argument (thread, start_info);
 788         mono_g_hash_table_insert (threads_starting_up, thread, thread);
 789         mono_threads_unlock ();
 790
 791         /* Create suspended, so we can do some housekeeping before the thread
 792          * starts
 793          */
 794         thread_handle = mono_create_thread (NULL, default_stacksize_for_thread (thread), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
 795                                      CREATE_SUSPENDED, &tid);
 796         THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
 797         if (thread_handle == NULL) {
 798                 /* The thread couldn't be created, so throw an exception */
 799                 mono_threads_lock ();
 800                 mono_g_hash_table_remove (threads_starting_up, thread);
 801                 mono_threads_unlock ();
 802                 g_free (start_info);
 803                 mono_raise_exception (mono_get_exception_execution_engine ("Couldn't create thread"));
 804                 return NULL;
 805         }
 806
 807         thread->handle=thread_handle;
 808         thread->tid=tid;
 809         thread->apartment_state=ThreadApartmentState_Unknown;
 810         small_id_alloc (thread);
 811
 812         thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
 813         InitializeCriticalSection (thread->synch_cs);
 814
 815         thread->threadpool_thread = threadpool_thread;
 816         if (threadpool_thread)
 817                 mono_thread_set_state (thread, ThreadState_Background);
 818
 819         if (handle_store (thread))
 820                 ResumeThread (thread_handle);
 821
 822         return thread;
 823 }
 824
 825 void
 826 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
 827 {
 828         mono_thread_create_internal (domain, func, arg, FALSE);
 829 }
 830
 831 /*
 832  * mono_thread_get_stack_bounds:
 833  *
 834  *   Return the address and size of the current threads stack. Return NULL as the
 835  * stack address if the stack address cannot be determined.
 836  */
 837 void
 838 mono_thread_get_stack_bounds (guint8 **staddr, size_t *stsize)
 839 {
 840 #if defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
 841         *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self ());
 842         *stsize = pthread_get_stacksize_np (pthread_self ());
 843         *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
 844         return;
 845         /* FIXME: simplify the mess below */
 846 #elif !defined(PLATFORM_WIN32)
 847         pthread_attr_t attr;
 848         guint8 *current = (guint8*)&attr;
 849
 850         pthread_attr_init (&attr);
 851 #  ifdef HAVE_PTHREAD_GETATTR_NP
 852         pthread_getattr_np (pthread_self(), &attr);
 853 #  else
 854 #    ifdef HAVE_PTHREAD_ATTR_GET_NP
 855         pthread_attr_get_np (pthread_self(), &attr);
 856 #    elif defined(sun)
 857         *staddr = NULL;
 858         pthread_attr_getstacksize (&attr, &stsize);
 859 #    else
 860         *staddr = NULL;
 861         *stsize = 0;
 862         return;
 863 #    endif
 864 #  endif
 865
 866 #  ifndef sun
 867         pthread_attr_getstack (&attr, (void**)staddr, stsize);
 868         if (*staddr)
 869                 g_assert ((current > *staddr) && (current < *staddr + *stsize));
 870 #  endif
 871
 872         pthread_attr_destroy (&attr);
 873 #endif
 874
 875         /* When running under emacs, sometimes staddr is not aligned to a page size */
 876         *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
 877 }
 878
 879 MonoThread *
 880 mono_thread_attach (MonoDomain *domain)
 881 {
 882         MonoThread *thread;
 883         HANDLE thread_handle;
 884         gsize tid;
 885
 886         if ((thread = mono_thread_current ())) {
 887                 if (domain != mono_domain_get ())
 888                         mono_domain_set (domain, TRUE);
 889                 /* Already attached */
 890                 return thread;
 891         }
 892
 893         if (!mono_gc_register_thread (&domain)) {
 894                 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 ());
 895         }
 896
 897         thread = (MonoThread *)mono_object_new (domain,
 898                                                 mono_defaults.thread_class);
 899
 900         thread_handle = GetCurrentThread ();
 901         g_assert (thread_handle);
 902
 903         tid=GetCurrentThreadId ();
 904
 905         /*
 906          * The handle returned by GetCurrentThread () is a pseudo handle, so it can't be used to
 907          * refer to the thread from other threads for things like aborting.
 908          */
 909         DuplicateHandle (GetCurrentProcess (), thread_handle, GetCurrentProcess (), &thread_handle,
 910                                          THREAD_ALL_ACCESS, TRUE, 0);
 911
 912         thread->handle=thread_handle;
 913         thread->tid=tid;
 914         thread->apartment_state=ThreadApartmentState_Unknown;
 915         small_id_alloc (thread);
 916         thread->stack_ptr = &tid;
 917
 918         thread->synch_cs = g_new0 (CRITICAL_SECTION, 1);
 919         InitializeCriticalSection (thread->synch_cs);
 920
 921         THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread_handle));
 922
 923         if (!handle_store (thread)) {
 924                 /* Mono is shutting down, so just wait for the end */
 925                 for (;;)
 926                         Sleep (10000);
 927         }
 928
 929         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, GetCurrentThreadId (), thread));
 930
 931         SET_CURRENT_OBJECT (thread);
 932         mono_domain_set (domain, TRUE);
 933
 934         mono_monitor_init_tls ();
 935
 936         thread_adjust_static_data (thread);
 937
 938         if (mono_thread_attach_cb) {
 939                 guint8 *staddr;
 940                 size_t stsize;
 941
 942                 mono_thread_get_stack_bounds (&staddr, &stsize);
 943
 944                 if (staddr == NULL)
 945                         mono_thread_attach_cb (tid, &tid);
 946                 else
 947                         mono_thread_attach_cb (tid, staddr + stsize);
 948         }
 949
 950         // FIXME: Need a separate callback
 951         mono_profiler_thread_start (tid);
 952
 953         return(thread);
 954 }
 955
 956 void
 957 mono_thread_detach (MonoThread *thread)
 958 {
 959         g_return_if_fail (thread != NULL);
 960
 961         THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
 962
 963         thread_cleanup (thread);
 964
 965         SET_CURRENT_OBJECT (NULL);
 966
 967         /* Don't need to CloseHandle this thread, even though we took a
 968          * reference in mono_thread_attach (), because the GC will do it
 969          * when the Thread object is finalised.
 970          */
 971 }
 972
 973 void
 974 mono_thread_exit ()
 975 {
 976         MonoThread *thread = mono_thread_current ();
 977
 978         THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
 979
 980         thread_cleanup (thread);
 981         SET_CURRENT_OBJECT (NULL);
 982
 983         /* we could add a callback here for embedders to use. */
 984         if (thread == mono_thread_get_main ())
 985                 exit (mono_environment_exitcode_get ());
 986         ExitThread (-1);
 987 }
 988
 989 HANDLE ves_icall_System_Threading_Thread_Thread_internal(MonoThread *this,
 990                                                          MonoObject *start)
 991 {
 992         guint32 (*start_func)(void *);
 993         struct StartInfo *start_info;
 994         HANDLE thread;
 995         gsize tid;
 996
 997         MONO_ARCH_SAVE_REGS;
 998
 999         THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this, start));
1000
1001         ensure_synch_cs_set (this);
1002
1003         EnterCriticalSection (this->synch_cs);
1004
1005         if ((this->state & ThreadState_Unstarted) == 0) {
1006                 LeaveCriticalSection (this->synch_cs);
1007                 mono_raise_exception (mono_get_exception_thread_state ("Thread has already been started."));
1008                 return NULL;
1009         }
1010
1011         this->small_id = -1;
1012
1013         if ((this->state & ThreadState_Aborted) != 0) {
1014                 LeaveCriticalSection (this->synch_cs);
1015                 return this;
1016         }
1017         start_func = NULL;
1018         {
1019                 /* This is freed in start_wrapper */
1020                 start_info = g_new0 (struct StartInfo, 1);
1021                 start_info->func = start_func;
1022                 start_info->start_arg = this->start_obj; /* FIXME: GC object stored in unmanaged memory */
1023                 start_info->delegate = start;
1024                 start_info->obj = this;
1025                 start_info->domain = mono_domain_get ();
1026
1027                 this->start_notify=CreateSemaphore (NULL, 0, 0x7fffffff, NULL);
1028                 if(this->start_notify==NULL) {
1029                         LeaveCriticalSection (this->synch_cs);
1030                         g_warning ("%s: CreateSemaphore error 0x%x", __func__, GetLastError ());
1031                         g_free (start_info);
1032                         return(NULL);
1033                 }
1034
1035                 mono_threads_lock ();
1036                 register_thread_start_argument (this, start_info);
1037                 if (threads_starting_up == NULL) {
1038                         MONO_GC_REGISTER_ROOT (threads_starting_up);
1039                         threads_starting_up = mono_g_hash_table_new (NULL, NULL);
1040                 }
1041                 mono_g_hash_table_insert (threads_starting_up, this, this);
1042                 mono_threads_unlock ();
1043
1044                 thread=mono_create_thread(NULL, default_stacksize_for_thread (this), (LPTHREAD_START_ROUTINE)start_wrapper, start_info,
1045                                     CREATE_SUSPENDED, &tid);
1046                 if(thread==NULL) {
1047                         LeaveCriticalSection (this->synch_cs);
1048                         mono_threads_lock ();
1049                         mono_g_hash_table_remove (threads_starting_up, this);
1050                         mono_threads_unlock ();
1051                         g_warning("%s: CreateThread error 0x%x", __func__, GetLastError());
1052                         return(NULL);
1053                 }
1054
1055                 this->handle=thread;
1056                 this->tid=tid;
1057                 small_id_alloc (this);
1058
1059                 /* Don't call handle_store() here, delay it to Start.
1060                  * We can't join a thread (trying to will just block
1061                  * forever) until it actually starts running, so don't
1062                  * store the handle till then.
1063                  */
1064
1065                 mono_thread_start (this);
1066
1067                 this->state &= ~ThreadState_Unstarted;
1068
1069                 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1070
1071                 LeaveCriticalSection (this->synch_cs);
1072                 return(thread);
1073         }
1074 }
1075
1076 void ves_icall_System_Threading_Thread_Thread_init (MonoThread *this)
1077 {
1078         MONO_ARCH_SAVE_REGS;
1079
1080         ensure_synch_cs_set (this);
1081 }
1082
1083 void ves_icall_System_Threading_Thread_Thread_free_internal (MonoThread *this,
1084                                                              HANDLE thread)
1085 {
1086         MONO_ARCH_SAVE_REGS;
1087
1088         THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1089
1090         if (thread)
1091                 CloseHandle (thread);
1092
1093         if (this->synch_cs) {
1094                 DeleteCriticalSection (this->synch_cs);
1095                 g_free (this->synch_cs);
1096                 this->synch_cs = NULL;
1097         }
1098
1099         g_assert (!this->abort_exc && !this->abort_state_handle);
1100 }
1101
1102 static void mono_thread_start (MonoThread *thread)
1103 {
1104         MONO_ARCH_SAVE_REGS;
1105
1106         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1107
1108         /* Only store the handle when the thread is about to be
1109          * launched, to avoid the main thread deadlocking while trying
1110          * to clean up a thread that will never be signalled.
1111          */
1112         if (!handle_store (thread))
1113                 return;
1114
1115         ResumeThread (thread->handle);
1116
1117         if(thread->start_notify!=NULL) {
1118                 /* Wait for the thread to set up its TLS data etc, so
1119                  * theres no potential race condition if someone tries
1120                  * to look up the data believing the thread has
1121                  * started
1122                  */
1123
1124                 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for thread %p (%"G_GSIZE_FORMAT") to start", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1125
1126                 WaitForSingleObjectEx (thread->start_notify, INFINITE, FALSE);
1127                 CloseHandle (thread->start_notify);
1128                 thread->start_notify = NULL;
1129         }
1130
1131         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
1132 }
1133
1134 void ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1135 {
1136         guint32 res;
1137         MonoThread *thread = mono_thread_current ();
1138
1139         MONO_ARCH_SAVE_REGS;
1140
1141         THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1142
1143         mono_thread_current_check_pending_interrupt ();
1144
1145         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1146
1147         res = SleepEx(ms,TRUE);
1148
1149         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1150
1151         if (res == WAIT_IO_COMPLETION) { /* we might have been interrupted */
1152                 MonoException* exc = mono_thread_execute_interruption (thread);
1153                 if (exc) mono_raise_exception (exc);
1154         }
1155 }
1156
1157 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1158 {
1159 }
1160
1161 gint32
1162 ves_icall_System_Threading_Thread_GetDomainID (void)
1163 {
1164         MONO_ARCH_SAVE_REGS;
1165
1166         return mono_domain_get()->domain_id;
1167 }
1168
1169 /*
1170  * mono_thread_get_name:
1171  *
1172  *   Return the name of the thread. NAME_LEN is set to the length of the name.
1173  * Return NULL if the thread has no name. The returned memory is owned by the
1174  * caller.
1175  */
1176 gunichar2*
1177 mono_thread_get_name (MonoThread *this_obj, guint32 *name_len)
1178 {
1179         gunichar2 *res;
1180
1181         ensure_synch_cs_set (this_obj);
1182
1183         EnterCriticalSection (this_obj->synch_cs);
1184
1185         if (!this_obj->name) {
1186                 *name_len = 0;
1187                 res = NULL;
1188         } else {
1189                 *name_len = this_obj->name_len;
1190                 res = g_new (gunichar2, this_obj->name_len);
1191                 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1192         }
1193
1194         LeaveCriticalSection (this_obj->synch_cs);
1195
1196         return res;
1197 }
1198
1199 MonoString*
1200 ves_icall_System_Threading_Thread_GetName_internal (MonoThread *this_obj)
1201 {
1202         MonoString* str;
1203
1204         ensure_synch_cs_set (this_obj);
1205
1206         EnterCriticalSection (this_obj->synch_cs);
1207
1208         if (!this_obj->name)
1209                 str = NULL;
1210         else
1211                 str = mono_string_new_utf16 (mono_domain_get (), this_obj->name, this_obj->name_len);
1212
1213         LeaveCriticalSection (this_obj->synch_cs);
1214
1215         return str;
1216 }
1217
1218 void
1219 ves_icall_System_Threading_Thread_SetName_internal (MonoThread *this_obj, MonoString *name)
1220 {
1221         ensure_synch_cs_set (this_obj);
1222
1223         EnterCriticalSection (this_obj->synch_cs);
1224
1225         if (this_obj->name) {
1226                 LeaveCriticalSection (this_obj->synch_cs);
1227
1228                 mono_raise_exception (mono_get_exception_invalid_operation ("Thread.Name can only be set once."));
1229                 return;
1230         }
1231         if (name) {
1232                 this_obj->name = g_new (gunichar2, mono_string_length (name));
1233                 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1234                 this_obj->name_len = mono_string_length (name);
1235         }
1236         else
1237                 this_obj->name = NULL;
1238
1239         LeaveCriticalSection (this_obj->synch_cs);
1240 }
1241
1242 static MonoObject*
1243 lookup_cached_culture (MonoThread *this, MonoDomain *domain, int start_idx)
1244 {
1245         MonoObject *res;
1246         int i;
1247
1248         if (this->cached_culture_info) {
1249                 domain = mono_domain_get ();
1250                 for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1251                         res = mono_array_get (this->cached_culture_info, MonoObject*, i);
1252                         if (res && res->vtable->domain == domain)
1253                                 return res;
1254                 }
1255         }
1256
1257         return NULL;
1258 }
1259
1260 MonoObject*
1261 ves_icall_System_Threading_Thread_GetCachedCurrentCulture (MonoThread *this)
1262 {
1263         return lookup_cached_culture (this, mono_domain_get (), CULTURES_START_IDX);
1264 }
1265
1266 MonoArray*
1267 ves_icall_System_Threading_Thread_GetSerializedCurrentCulture (MonoThread *this)
1268 {
1269         MonoArray *res;
1270
1271         ensure_synch_cs_set (this);
1272
1273         EnterCriticalSection (this->synch_cs);
1274
1275         if (this->serialized_culture_info) {
1276                 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_culture_info_len);
1277                 memcpy (mono_array_addr (res, guint8, 0), this->serialized_culture_info, this->serialized_culture_info_len);
1278         } else {
1279                 res = NULL;
1280         }
1281
1282         LeaveCriticalSection (this->synch_cs);
1283
1284         return res;
1285 }
1286
1287 static void
1288 cache_culture (MonoThread *this, MonoObject *culture, int start_idx)
1289 {
1290         int i;
1291         MonoDomain *domain = mono_domain_get ();
1292         MonoObject *obj;
1293         int free_slot = -1;
1294         int same_domain_slot = -1;
1295
1296         ensure_synch_cs_set (this);
1297
1298         EnterCriticalSection (this->synch_cs);
1299
1300         if (!this->cached_culture_info)
1301                 MONO_OBJECT_SETREF (this, cached_culture_info, mono_array_new_cached (mono_object_domain (this), mono_defaults.object_class, NUM_CACHED_CULTURES * 2));
1302
1303         for (i = start_idx; i < start_idx + NUM_CACHED_CULTURES; ++i) {
1304                 obj = mono_array_get (this->cached_culture_info, MonoObject*, i);
1305                 /* Free entry */
1306                 if (!obj) {
1307                         free_slot = i;
1308                         /* we continue, because there may be a slot used with the same domain */
1309                         continue;
1310                 }
1311                 /* Replace */
1312                 if (obj->vtable->domain == domain) {
1313                         same_domain_slot = i;
1314                         break;
1315                 }
1316         }
1317         if (same_domain_slot >= 0)
1318                 mono_array_setref (this->cached_culture_info, same_domain_slot, culture);
1319         else if (free_slot >= 0)
1320                 mono_array_setref (this->cached_culture_info, free_slot, culture);
1321         /* we may want to replace an existing entry here, even when no suitable slot is found */
1322
1323         LeaveCriticalSection (this->synch_cs);
1324 }
1325
1326 void
1327 ves_icall_System_Threading_Thread_SetCachedCurrentCulture (MonoThread *this, MonoObject *culture)
1328 {
1329         cache_culture (this, culture, CULTURES_START_IDX);
1330 }
1331
1332 void
1333 ves_icall_System_Threading_Thread_SetSerializedCurrentCulture (MonoThread *this, MonoArray *arr)
1334 {
1335         ensure_synch_cs_set (this);
1336
1337         EnterCriticalSection (this->synch_cs);
1338
1339         if (this->serialized_culture_info)
1340                 g_free (this->serialized_culture_info);
1341         this->serialized_culture_info = g_new0 (guint8, mono_array_length (arr));
1342         this->serialized_culture_info_len = mono_array_length (arr);
1343         memcpy (this->serialized_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
1344
1345         LeaveCriticalSection (this->synch_cs);
1346 }
1347
1348
1349 MonoObject*
1350 ves_icall_System_Threading_Thread_GetCachedCurrentUICulture (MonoThread *this)
1351 {
1352         return lookup_cached_culture (this, mono_domain_get (), UICULTURES_START_IDX);
1353 }
1354
1355 MonoArray*
1356 ves_icall_System_Threading_Thread_GetSerializedCurrentUICulture (MonoThread *this)
1357 {
1358         MonoArray *res;
1359
1360         ensure_synch_cs_set (this);
1361
1362         EnterCriticalSection (this->synch_cs);
1363
1364         if (this->serialized_ui_culture_info) {
1365                 res = mono_array_new (mono_domain_get (), mono_defaults.byte_class, this->serialized_ui_culture_info_len);
1366                 memcpy (mono_array_addr (res, guint8, 0), this->serialized_ui_culture_info, this->serialized_ui_culture_info_len);
1367         } else {
1368                 res = NULL;
1369         }
1370
1371         LeaveCriticalSection (this->synch_cs);
1372
1373         return res;
1374 }
1375
1376 void
1377 ves_icall_System_Threading_Thread_SetCachedCurrentUICulture (MonoThread *this, MonoObject *culture)
1378 {
1379         cache_culture (this, culture, UICULTURES_START_IDX);
1380 }
1381
1382 void
1383 ves_icall_System_Threading_Thread_SetSerializedCurrentUICulture (MonoThread *this, MonoArray *arr)
1384 {
1385         ensure_synch_cs_set (this);
1386
1387         EnterCriticalSection (this->synch_cs);
1388
1389         if (this->serialized_ui_culture_info)
1390                 g_free (this->serialized_ui_culture_info);
1391         this->serialized_ui_culture_info = g_new0 (guint8, mono_array_length (arr));
1392         this->serialized_ui_culture_info_len = mono_array_length (arr);
1393         memcpy (this->serialized_ui_culture_info, mono_array_addr (arr, guint8, 0), mono_array_length (arr));
1394
1395         LeaveCriticalSection (this->synch_cs);
1396 }
1397
1398 /* the jit may read the compiled code of this function */
1399 MonoThread *
1400 mono_thread_current (void)
1401 {
1402         MonoThread *res = GET_CURRENT_OBJECT ();
1403         THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1404         return res;
1405 }
1406
1407 gboolean ves_icall_System_Threading_Thread_Join_internal(MonoThread *this,
1408                                                          int ms, HANDLE thread)
1409 {
1410         MonoThread *cur_thread = mono_thread_current ();
1411         gboolean ret;
1412
1413         MONO_ARCH_SAVE_REGS;
1414
1415         mono_thread_current_check_pending_interrupt ();
1416
1417         ensure_synch_cs_set (this);
1418
1419         EnterCriticalSection (this->synch_cs);
1420
1421         if ((this->state & ThreadState_Unstarted) != 0) {
1422                 LeaveCriticalSection (this->synch_cs);
1423
1424                 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started."));
1425                 return FALSE;
1426         }
1427
1428         LeaveCriticalSection (this->synch_cs);
1429
1430         if(ms== -1) {
1431                 ms=INFINITE;
1432         }
1433         THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, thread, ms));
1434
1435         mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1436
1437         ret=WaitForSingleObjectEx (thread, ms, TRUE);
1438
1439         mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1440
1441         if(ret==WAIT_OBJECT_0) {
1442                 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1443
1444                 return(TRUE);
1445         }
1446
1447         THREAD_DEBUG (g_message ("%s: join failed", __func__));
1448
1449         return(FALSE);
1450 }
1451
1452 /* FIXME: exitContext isnt documented */
1453 gboolean ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1454 {
1455         HANDLE *handles;
1456         guint32 numhandles;
1457         guint32 ret;
1458         guint32 i;
1459         MonoObject *waitHandle;
1460         MonoThread *thread = mono_thread_current ();
1461
1462         MONO_ARCH_SAVE_REGS;
1463
1464         /* Do this WaitSleepJoin check before creating objects */
1465         mono_thread_current_check_pending_interrupt ();
1466
1467         numhandles = mono_array_length(mono_handles);
1468         handles = g_new0(HANDLE, numhandles);
1469
1470         for(i = 0; i < numhandles; i++) {
1471                 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1472                 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1473         }
1474
1475         if(ms== -1) {
1476                 ms=INFINITE;
1477         }
1478
1479         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1480
1481         ret=WaitForMultipleObjectsEx(numhandles, handles, TRUE, ms, TRUE);
1482
1483         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1484
1485         g_free(handles);
1486
1487         if(ret==WAIT_FAILED) {
1488                 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1489                 return(FALSE);
1490         } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1491                 /* Do we want to try again if we get
1492                  * WAIT_IO_COMPLETION? The documentation for
1493                  * WaitHandle doesn't give any clues.  (We'd have to
1494                  * fiddle with the timeout if we retry.)
1495                  */
1496                 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1497                 return(FALSE);
1498         }
1499
1500         return(TRUE);
1501 }
1502
1503 /* FIXME: exitContext isnt documented */
1504 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms, gboolean exitContext)
1505 {
1506         HANDLE *handles;
1507         guint32 numhandles;
1508         guint32 ret;
1509         guint32 i;
1510         MonoObject *waitHandle;
1511         MonoThread *thread = mono_thread_current ();
1512
1513         MONO_ARCH_SAVE_REGS;
1514
1515         /* Do this WaitSleepJoin check before creating objects */
1516         mono_thread_current_check_pending_interrupt ();
1517
1518         numhandles = mono_array_length(mono_handles);
1519         handles = g_new0(HANDLE, numhandles);
1520
1521         for(i = 0; i < numhandles; i++) {
1522                 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1523                 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1524         }
1525
1526         if(ms== -1) {
1527                 ms=INFINITE;
1528         }
1529
1530         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1531
1532         ret=WaitForMultipleObjectsEx(numhandles, handles, FALSE, ms, TRUE);
1533
1534         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1535
1536         g_free(handles);
1537
1538         THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, GetCurrentThreadId (), ret));
1539
1540         /*
1541          * These need to be here.  See MSDN dos on WaitForMultipleObjects.
1542          */
1543         if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1544                 return ret - WAIT_OBJECT_0;
1545         }
1546         else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1547                 return ret - WAIT_ABANDONED_0;
1548         }
1549         else {
1550                 return ret;
1551         }
1552 }
1553
1554 /* FIXME: exitContext isnt documented */
1555 gboolean ves_icall_System_Threading_WaitHandle_WaitOne_internal(MonoObject *this, HANDLE handle, gint32 ms, gboolean exitContext)
1556 {
1557         guint32 ret;
1558         MonoThread *thread = mono_thread_current ();
1559
1560         MONO_ARCH_SAVE_REGS;
1561
1562         THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, GetCurrentThreadId (), handle, ms));
1563
1564         if(ms== -1) {
1565                 ms=INFINITE;
1566         }
1567
1568         mono_thread_current_check_pending_interrupt ();
1569
1570         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1571
1572         ret=WaitForSingleObjectEx (handle, ms, TRUE);
1573
1574         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1575
1576         if(ret==WAIT_FAILED) {
1577                 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait failed", __func__, GetCurrentThreadId ()));
1578                 return(FALSE);
1579         } else if(ret==WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION) {
1580                 /* Do we want to try again if we get
1581                  * WAIT_IO_COMPLETION? The documentation for
1582                  * WaitHandle doesn't give any clues.  (We'd have to
1583                  * fiddle with the timeout if we retry.)
1584                  */
1585                 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Wait timed out", __func__, GetCurrentThreadId ()));
1586                 return(FALSE);
1587         }
1588
1589         return(TRUE);
1590 }
1591
1592 gboolean
1593 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms, gboolean exitContext)
1594 {
1595         guint32 ret;
1596         MonoThread *thread = mono_thread_current ();
1597
1598         MONO_ARCH_SAVE_REGS;
1599
1600         if (ms == -1)
1601                 ms = INFINITE;
1602
1603         mono_thread_current_check_pending_interrupt ();
1604
1605         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1606
1607         ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1608
1609         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1610
1611         return  (!(ret == WAIT_TIMEOUT || ret == WAIT_IO_COMPLETION || ret == WAIT_FAILED));
1612 }
1613
1614 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1615 {
1616         HANDLE mutex;
1617
1618         MONO_ARCH_SAVE_REGS;
1619
1620         *created = TRUE;
1621
1622         if (name == NULL) {
1623                 mutex = CreateMutex (NULL, owned, NULL);
1624         } else {
1625                 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1626
1627                 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1628                         *created = FALSE;
1629                 }
1630         }
1631
1632         return(mutex);
1633 }
1634
1635 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1636         MONO_ARCH_SAVE_REGS;
1637
1638         return(ReleaseMutex (handle));
1639 }
1640
1641 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1642                                                             gint32 rights,
1643                                                             gint32 *error)
1644 {
1645         HANDLE ret;
1646
1647         MONO_ARCH_SAVE_REGS;
1648
1649         *error = ERROR_SUCCESS;
1650
1651         ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1652         if (ret == NULL) {
1653                 *error = GetLastError ();
1654         }
1655
1656         return(ret);
1657 }
1658
1659
1660 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, MonoBoolean *created)
1661 {
1662         HANDLE sem;
1663
1664         MONO_ARCH_SAVE_REGS;
1665
1666         *created = TRUE;
1667
1668         if (name == NULL) {
1669                 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1670         } else {
1671                 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1672                                        mono_string_chars (name));
1673
1674                 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1675                         *created = FALSE;
1676                 }
1677         }
1678
1679         return(sem);
1680 }
1681
1682 gint32 ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, MonoBoolean *fail)
1683 {
1684         gint32 prevcount;
1685
1686         MONO_ARCH_SAVE_REGS;
1687
1688         *fail = !ReleaseSemaphore (handle, releaseCount, &prevcount);
1689
1690         return (prevcount);
1691 }
1692
1693 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1694 {
1695         HANDLE ret;
1696
1697         MONO_ARCH_SAVE_REGS;
1698
1699         *error = ERROR_SUCCESS;
1700
1701         ret = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1702         if (ret == NULL) {
1703                 *error = GetLastError ();
1704         }
1705
1706         return(ret);
1707 }
1708
1709 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, MonoBoolean *created)
1710 {
1711         HANDLE event;
1712
1713         MONO_ARCH_SAVE_REGS;
1714
1715         *created = TRUE;
1716
1717         if (name == NULL) {
1718                 event = CreateEvent (NULL, manual, initial, NULL);
1719         } else {
1720                 event = CreateEvent (NULL, manual, initial,
1721                                      mono_string_chars (name));
1722
1723                 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1724                         *created = FALSE;
1725                 }
1726         }
1727
1728         return(event);
1729 }
1730
1731 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1732         MONO_ARCH_SAVE_REGS;
1733
1734         return (SetEvent(handle));
1735 }
1736
1737 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1738         MONO_ARCH_SAVE_REGS;
1739
1740         return (ResetEvent(handle));
1741 }
1742
1743 void
1744 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1745         MONO_ARCH_SAVE_REGS;
1746
1747         CloseHandle (handle);
1748 }
1749
1750 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1751                                                              gint32 rights,
1752                                                              gint32 *error)
1753 {
1754         HANDLE ret;
1755
1756         MONO_ARCH_SAVE_REGS;
1757
1758         *error = ERROR_SUCCESS;
1759
1760         ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1761         if (ret == NULL) {
1762                 *error = GetLastError ();
1763         }
1764
1765         return(ret);
1766 }
1767
1768 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1769 {
1770         MONO_ARCH_SAVE_REGS;
1771
1772         return InterlockedIncrement (location);
1773 }
1774
1775 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1776 {
1777         gint64 ret;
1778
1779         MONO_ARCH_SAVE_REGS;
1780
1781         mono_interlocked_lock ();
1782
1783         ret = ++ *location;
1784
1785         mono_interlocked_unlock ();
1786
1787
1788         return ret;
1789 }
1790
1791 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1792 {
1793         MONO_ARCH_SAVE_REGS;
1794
1795         return InterlockedDecrement(location);
1796 }
1797
1798 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1799 {
1800         gint64 ret;
1801
1802         MONO_ARCH_SAVE_REGS;
1803
1804         mono_interlocked_lock ();
1805
1806         ret = -- *location;
1807
1808         mono_interlocked_unlock ();
1809
1810         return ret;
1811 }
1812
1813 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1814 {
1815         MONO_ARCH_SAVE_REGS;
1816
1817         return InterlockedExchange(location, value);
1818 }
1819
1820 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1821 {
1822         MonoObject *res;
1823         res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1824         mono_gc_wbarrier_generic_nostore (location);
1825         return res;
1826 }
1827
1828 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1829 {
1830         return InterlockedExchangePointer(location, value);
1831 }
1832
1833 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1834 {
1835         IntFloatUnion val, ret;
1836
1837         MONO_ARCH_SAVE_REGS;
1838
1839         val.fval = value;
1840         ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1841
1842         return ret.fval;
1843 }
1844
1845 gint64
1846 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1847 {
1848 #if SIZEOF_VOID_P == 8
1849         return (gint64) InterlockedExchangePointer((gpointer *) location, (gpointer)value);
1850 #else
1851         gint64 res;
1852
1853         /*
1854          * According to MSDN, this function is only atomic with regards to the
1855          * other Interlocked functions on 32 bit platforms.
1856          */
1857         mono_interlocked_lock ();
1858         res = *location;
1859         *location = value;
1860         mono_interlocked_unlock ();
1861
1862         return res;
1863 #endif
1864 }
1865
1866 gdouble
1867 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1868 {
1869 #if SIZEOF_VOID_P == 8
1870         LongDoubleUnion val, ret;
1871
1872         val.fval = value;
1873         ret.ival = (gint64)InterlockedExchangePointer((gpointer *) location, (gpointer)val.ival);
1874
1875         return ret.fval;
1876 #else
1877         gdouble res;
1878
1879         /*
1880          * According to MSDN, this function is only atomic with regards to the
1881          * other Interlocked functions on 32 bit platforms.
1882          */
1883         mono_interlocked_lock ();
1884         res = *location;
1885         *location = value;
1886         mono_interlocked_unlock ();
1887
1888         return res;
1889 #endif
1890 }
1891
1892 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1893 {
1894         MONO_ARCH_SAVE_REGS;
1895
1896         return InterlockedCompareExchange(location, value, comparand);
1897 }
1898
1899 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1900 {
1901         MonoObject *res;
1902         res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1903         mono_gc_wbarrier_generic_nostore (location);
1904         return res;
1905 }
1906
1907 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1908 {
1909         return InterlockedCompareExchangePointer(location, value, comparand);
1910 }
1911
1912 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1913 {
1914         IntFloatUnion val, ret, cmp;
1915
1916         MONO_ARCH_SAVE_REGS;
1917
1918         val.fval = value;
1919         cmp.fval = comparand;
1920         ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1921
1922         return ret.fval;
1923 }
1924
1925 gdouble
1926 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
1927 {
1928 #if SIZEOF_VOID_P == 8
1929         LongDoubleUnion val, comp, ret;
1930
1931         val.fval = value;
1932         comp.fval = comparand;
1933         ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
1934
1935         return ret.fval;
1936 #else
1937         gdouble old;
1938
1939         mono_interlocked_lock ();
1940         old = *location;
1941         if (old == comparand)
1942                 *location = value;
1943         mono_interlocked_unlock ();
1944
1945         return old;
1946 #endif
1947 }
1948
1949 gint64
1950 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
1951 {
1952 #if SIZEOF_VOID_P == 8
1953         return (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)value, (gpointer)comparand);
1954 #else
1955         gint64 old;
1956
1957         mono_interlocked_lock ();
1958         old = *location;
1959         if (old == comparand)
1960                 *location = value;
1961         mono_interlocked_unlock ();
1962
1963         return old;
1964 #endif
1965 }
1966
1967 MonoObject*
1968 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
1969 {
1970         MonoObject *res;
1971         res = InterlockedCompareExchangePointer ((gpointer *)location, value, comparand);
1972         mono_gc_wbarrier_generic_nostore (location);
1973         return res;
1974 }
1975
1976 MonoObject*
1977 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
1978 {
1979         MonoObject *res;
1980         res = InterlockedExchangePointer ((gpointer *)location, value);
1981         mono_gc_wbarrier_generic_nostore (location);
1982         return res;
1983 }
1984
1985 gint32
1986 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
1987 {
1988 #if SIZEOF_VOID_P == 8
1989         /* Should be implemented as a JIT intrinsic */
1990         mono_raise_exception (mono_get_exception_not_implemented (NULL));
1991         return 0;
1992 #else
1993         gint32 orig;
1994
1995         mono_interlocked_lock ();
1996         orig = *location;
1997         *location = orig + value;
1998         mono_interlocked_unlock ();
1999
2000         return orig + value;
2001 #endif
2002 }
2003
2004 gint64
2005 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2006 {
2007 #if SIZEOF_VOID_P == 8
2008         /* Should be implemented as a JIT intrinsic */
2009         mono_raise_exception (mono_get_exception_not_implemented (NULL));
2010         return 0;
2011 #else
2012         gint64 orig;
2013
2014         mono_interlocked_lock ();
2015         orig = *location;
2016         *location = orig + value;
2017         mono_interlocked_unlock ();
2018
2019         return orig + value;
2020 #endif
2021 }
2022
2023 gint64
2024 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2025 {
2026 #if SIZEOF_VOID_P == 8
2027         /* 64 bit reads are already atomic */
2028         return *location;
2029 #else
2030         gint64 res;
2031
2032         mono_interlocked_lock ();
2033         res = *location;
2034         mono_interlocked_unlock ();
2035
2036         return res;
2037 #endif
2038 }
2039
2040 void
2041 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2042 {
2043         mono_threads_lock ();
2044         mono_threads_unlock ();
2045 }
2046
2047 void
2048 ves_icall_System_Threading_Thread_ClrState (MonoThread* this, guint32 state)
2049 {
2050         mono_thread_clr_state (this, state);
2051
2052         if (state & ThreadState_Background) {
2053                 /* If the thread changes the background mode, the main thread has to
2054                  * be notified, since it has to rebuild the list of threads to
2055                  * wait for.
2056                  */
2057                 SetEvent (background_change_event);
2058         }
2059 }
2060
2061 void
2062 ves_icall_System_Threading_Thread_SetState (MonoThread* this, guint32 state)
2063 {
2064         mono_thread_set_state (this, state);
2065
2066         if (state & ThreadState_Background) {
2067                 /* If the thread changes the background mode, the main thread has to
2068                  * be notified, since it has to rebuild the list of threads to
2069                  * wait for.
2070                  */
2071                 SetEvent (background_change_event);
2072         }
2073 }
2074
2075 guint32
2076 ves_icall_System_Threading_Thread_GetState (MonoThread* this)
2077 {
2078         guint32 state;
2079
2080         ensure_synch_cs_set (this);
2081
2082         EnterCriticalSection (this->synch_cs);
2083
2084         state = this->state;
2085
2086         LeaveCriticalSection (this->synch_cs);
2087
2088         return state;
2089 }
2090
2091 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this)
2092 {
2093         gboolean throw = FALSE;
2094
2095         ensure_synch_cs_set (this);
2096
2097         if (this == mono_thread_current ())
2098                 return;
2099
2100         EnterCriticalSection (this->synch_cs);
2101
2102         this->thread_interrupt_requested = TRUE;
2103
2104         if (this->state & ThreadState_WaitSleepJoin) {
2105                 throw = TRUE;
2106         }
2107
2108         LeaveCriticalSection (this->synch_cs);
2109
2110         if (throw) {
2111                 signal_thread_state_change (this);
2112         }
2113 }
2114
2115 void mono_thread_current_check_pending_interrupt ()
2116 {
2117         MonoThread *thread = mono_thread_current ();
2118         gboolean throw = FALSE;
2119
2120         mono_debugger_check_interruption ();
2121
2122         ensure_synch_cs_set (thread);
2123
2124         EnterCriticalSection (thread->synch_cs);
2125
2126         if (thread->thread_interrupt_requested) {
2127                 throw = TRUE;
2128                 thread->thread_interrupt_requested = FALSE;
2129         }
2130
2131         LeaveCriticalSection (thread->synch_cs);
2132
2133         if (throw) {
2134                 mono_raise_exception (mono_get_exception_thread_interrupted ());
2135         }
2136 }
2137
2138 int
2139 mono_thread_get_abort_signal (void)
2140 {
2141 #ifdef PLATFORM_WIN32
2142         return -1;
2143 #else
2144 #ifndef SIGRTMIN
2145 #ifdef SIGUSR1
2146         return SIGUSR1;
2147 #else
2148         return -1;
2149 #endif
2150 #else
2151         static int abort_signum = -1;
2152         int i;
2153         if (abort_signum != -1)
2154                 return abort_signum;
2155         /* we try to avoid SIGRTMIN and any one that might have been set already, see bug #75387 */
2156         for (i = SIGRTMIN + 1; i < SIGRTMAX; ++i) {
2157                 struct sigaction sinfo;
2158                 sigaction (i, NULL, &sinfo);
2159                 if (sinfo.sa_handler == SIG_DFL && (void*)sinfo.sa_sigaction == (void*)SIG_DFL) {
2160                         abort_signum = i;
2161                         return i;
2162                 }
2163         }
2164         /* fallback to the old way */
2165         return SIGRTMIN;
2166 #endif
2167 #endif /* PLATFORM_WIN32 */
2168 }
2169
2170 #ifdef PLATFORM_WIN32
2171 static void CALLBACK interruption_request_apc (ULONG_PTR param)
2172 {
2173         MonoException* exc = mono_thread_request_interruption (FALSE);
2174         if (exc) mono_raise_exception (exc);
2175 }
2176 #endif /* PLATFORM_WIN32 */
2177
2178 /*
2179  * signal_thread_state_change
2180  *
2181  * Tells the thread that his state has changed and it has to enter the new
2182  * state as soon as possible.
2183  */
2184 static void signal_thread_state_change (MonoThread *thread)
2185 {
2186         if (thread == mono_thread_current ()) {
2187                 /* Do it synchronously */
2188                 MonoException *exc = mono_thread_request_interruption (FALSE);
2189                 if (exc)
2190                         mono_raise_exception (exc);
2191         }
2192
2193 #ifdef PLATFORM_WIN32
2194         QueueUserAPC ((PAPCFUNC)interruption_request_apc, thread->handle, NULL);
2195 #else
2196         /* fixme: store the state somewhere */
2197 #ifdef PTHREAD_POINTER_ID
2198         pthread_kill ((gpointer)(gsize)(thread->tid), mono_thread_get_abort_signal ());
2199 #else
2200         pthread_kill (thread->tid, mono_thread_get_abort_signal ());
2201 #endif
2202
2203         /*
2204          * This will cause waits to be broken.
2205          * It will also prevent the thread from entering a wait, so if the thread returns
2206          * from the wait before it receives the abort signal, it will just spin in the wait
2207          * functions in the io-layer until the signal handler calls QueueUserAPC which will
2208          * make it return.
2209          */
2210         wapi_interrupt_thread (thread->handle);
2211 #endif /* PLATFORM_WIN32 */
2212 }
2213
2214 void
2215 ves_icall_System_Threading_Thread_Abort (MonoThread *thread, MonoObject *state)
2216 {
2217         MONO_ARCH_SAVE_REGS;
2218
2219         ensure_synch_cs_set (thread);
2220
2221         EnterCriticalSection (thread->synch_cs);
2222
2223         if ((thread->state & ThreadState_AbortRequested) != 0 ||
2224                 (thread->state & ThreadState_StopRequested) != 0 ||
2225                 (thread->state & ThreadState_Stopped) != 0)
2226         {
2227                 LeaveCriticalSection (thread->synch_cs);
2228                 return;
2229         }
2230
2231         if ((thread->state & ThreadState_Unstarted) != 0) {
2232                 thread->state |= ThreadState_Aborted;
2233                 LeaveCriticalSection (thread->synch_cs);
2234                 return;
2235         }
2236
2237         thread->state |= ThreadState_AbortRequested;
2238         if (thread->abort_state_handle)
2239                 mono_gchandle_free (thread->abort_state_handle);
2240         if (state) {
2241                 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2242                 g_assert (thread->abort_state_handle);
2243         } else {
2244                 thread->abort_state_handle = 0;
2245         }
2246         thread->abort_exc = NULL;
2247
2248         LeaveCriticalSection (thread->synch_cs);
2249
2250         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, GetCurrentThreadId (), thread, (gsize)thread->tid));
2251
2252         /* During shutdown, we can't wait for other threads */
2253         if (!shutting_down)
2254                 /* Make sure the thread is awake */
2255                 mono_thread_resume (thread);
2256
2257         signal_thread_state_change (thread);
2258 }
2259
2260 void
2261 ves_icall_System_Threading_Thread_ResetAbort (void)
2262 {
2263         MonoThread *thread = mono_thread_current ();
2264
2265         MONO_ARCH_SAVE_REGS;
2266
2267         ensure_synch_cs_set (thread);
2268
2269         EnterCriticalSection (thread->synch_cs);
2270
2271         thread->state &= ~ThreadState_AbortRequested;
2272
2273         if (!thread->abort_exc) {
2274                 const char *msg = "Unable to reset abort because no abort was requested";
2275                 LeaveCriticalSection (thread->synch_cs);
2276                 mono_raise_exception (mono_get_exception_thread_state (msg));
2277         } else {
2278                 thread->abort_exc = NULL;
2279                 if (thread->abort_state_handle) {
2280                         mono_gchandle_free (thread->abort_state_handle);
2281                         /* This is actually not necessary - the handle
2282                            only counts if the exception is set */
2283                         thread->abort_state_handle = 0;
2284                 }
2285         }
2286
2287         LeaveCriticalSection (thread->synch_cs);
2288 }
2289
2290 static MonoObject*
2291 serialize_object (MonoObject *obj, gboolean *failure, MonoObject **exc)
2292 {
2293         static MonoMethod *serialize_method;
2294
2295         void *params [1];
2296         MonoObject *array;
2297
2298         if (!serialize_method) {
2299                 MonoClass *klass = mono_class_from_name (mono_defaults.corlib, "System.Runtime.Remoting", "RemotingServices");
2300                 serialize_method = mono_class_get_method_from_name (klass, "SerializeCallData", -1);
2301         }
2302
2303         if (!serialize_method) {
2304                 *failure = TRUE;
2305                 return NULL;
2306         }
2307
2308         g_assert (!obj->vtable->klass->marshalbyref);
2309
2310         params [0] = obj;
2311         *exc = NULL;
2312         array = mono_runtime_invoke (serialize_method, NULL, params, exc);
2313         if (*exc)
2314                 *failure = TRUE;
2315
2316         return array;
2317 }
2318
2319 static MonoObject*
2320 deserialize_object (MonoObject *obj, gboolean *failure, MonoObject **exc)
2321 {
2322         static MonoMethod *deserialize_method;
2323
2324         void *params [1];
2325         MonoObject *result;
2326
2327         if (!deserialize_method) {
2328                 MonoClass *klass = mono_class_from_name (mono_defaults.corlib, "System.Runtime.Remoting", "RemotingServices");
2329                 deserialize_method = mono_class_get_method_from_name (klass, "DeserializeCallData", -1);
2330         }
2331         if (!deserialize_method) {
2332                 *failure = TRUE;
2333                 return NULL;
2334         }
2335
2336         params [0] = obj;
2337         *exc = NULL;
2338         result = mono_runtime_invoke (deserialize_method, NULL, params, exc);
2339         if (*exc)
2340                 *failure = TRUE;
2341
2342         return result;
2343 }
2344
2345 static MonoObject*
2346 make_transparent_proxy (MonoObject *obj, gboolean *failure, MonoObject **exc)
2347 {
2348         static MonoMethod *get_proxy_method;
2349
2350         MonoDomain *domain = mono_domain_get ();
2351         MonoRealProxy *real_proxy;
2352         MonoReflectionType *reflection_type;
2353         MonoTransparentProxy *transparent_proxy;
2354
2355         if (!get_proxy_method)
2356                 get_proxy_method = mono_class_get_method_from_name (mono_defaults.real_proxy_class, "GetTransparentProxy", 0);
2357
2358         g_assert (obj->vtable->klass->marshalbyref);
2359
2360         real_proxy = (MonoRealProxy*) mono_object_new (domain, mono_defaults.real_proxy_class);
2361         reflection_type = mono_type_get_object (domain, &obj->vtable->klass->byval_arg);
2362
2363         real_proxy->class_to_proxy = reflection_type;
2364         real_proxy->unwrapped_server = obj;
2365
2366         *exc = NULL;
2367         transparent_proxy = (MonoTransparentProxy*) mono_runtime_invoke (get_proxy_method, real_proxy, NULL, exc);
2368         if (*exc)
2369                 *failure = TRUE;
2370
2371         return (MonoObject*) transparent_proxy;
2372 }
2373
2374 MonoObject*
2375 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *thread)
2376 {
2377         MonoObject *state, *serialized, *deserialized = NULL, *exc;
2378         MonoDomain *domain;
2379         gboolean failure = FALSE;
2380
2381         if (!thread->abort_state_handle)
2382                 return NULL;
2383
2384         state = mono_gchandle_get_target (thread->abort_state_handle);
2385         g_assert (state);
2386
2387         domain = mono_domain_get ();
2388         if (state->vtable->domain == domain)
2389                 return state;
2390
2391         if (state->vtable->klass->marshalbyref) {
2392                 deserialized = make_transparent_proxy (state, &failure, &exc);
2393         } else {
2394                 mono_domain_set_internal_with_options (state->vtable->domain, FALSE);
2395                 serialized = serialize_object (state, &failure, &exc);
2396                 mono_domain_set_internal_with_options (domain, FALSE);
2397                 if (!failure)
2398                         deserialized = deserialize_object (serialized, &failure, &exc);
2399         }
2400
2401         if (failure) {
2402                 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2403                 if (exc)
2404                         MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2405                 mono_raise_exception (invalid_op_exc);
2406         }
2407
2408         return deserialized;
2409 }
2410
2411 static gboolean
2412 mono_thread_suspend (MonoThread *thread)
2413 {
2414         MONO_ARCH_SAVE_REGS;
2415
2416         ensure_synch_cs_set (thread);
2417
2418         EnterCriticalSection (thread->synch_cs);
2419
2420         if ((thread->state & ThreadState_Unstarted) != 0 ||
2421                 (thread->state & ThreadState_Aborted) != 0 ||
2422                 (thread->state & ThreadState_Stopped) != 0)
2423         {
2424                 LeaveCriticalSection (thread->synch_cs);
2425                 return FALSE;
2426         }
2427
2428         if ((thread->state & ThreadState_Suspended) != 0 ||
2429                 (thread->state & ThreadState_SuspendRequested) != 0 ||
2430                 (thread->state & ThreadState_StopRequested) != 0)
2431         {
2432                 LeaveCriticalSection (thread->synch_cs);
2433                 return TRUE;
2434         }
2435
2436         thread->state |= ThreadState_SuspendRequested;
2437
2438         LeaveCriticalSection (thread->synch_cs);
2439
2440         signal_thread_state_change (thread);
2441         return TRUE;
2442 }
2443
2444 void
2445 ves_icall_System_Threading_Thread_Suspend (MonoThread *thread)
2446 {
2447         if (!mono_thread_suspend (thread))
2448                 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2449 }
2450
2451 static gboolean
2452 mono_thread_resume (MonoThread *thread)
2453 {
2454         MONO_ARCH_SAVE_REGS;
2455
2456         ensure_synch_cs_set (thread);
2457
2458         EnterCriticalSection (thread->synch_cs);
2459
2460         if ((thread->state & ThreadState_SuspendRequested) != 0) {
2461                 thread->state &= ~ThreadState_SuspendRequested;
2462                 LeaveCriticalSection (thread->synch_cs);
2463                 return TRUE;
2464         }
2465
2466         if ((thread->state & ThreadState_Suspended) == 0 ||
2467                 (thread->state & ThreadState_Unstarted) != 0 ||
2468                 (thread->state & ThreadState_Aborted) != 0 ||
2469                 (thread->state & ThreadState_Stopped) != 0)
2470         {
2471                 LeaveCriticalSection (thread->synch_cs);
2472                 return FALSE;
2473         }
2474
2475         thread->resume_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2476         if (thread->resume_event == NULL) {
2477                 LeaveCriticalSection (thread->synch_cs);
2478                 return(FALSE);
2479         }
2480
2481         /* Awake the thread */
2482         SetEvent (thread->suspend_event);
2483
2484         LeaveCriticalSection (thread->synch_cs);
2485
2486         /* Wait for the thread to awake */
2487         WaitForSingleObject (thread->resume_event, INFINITE);
2488         CloseHandle (thread->resume_event);
2489         thread->resume_event = NULL;
2490
2491         return TRUE;
2492 }
2493
2494 void
2495 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2496 {
2497         if (!mono_thread_resume (thread))
2498                 mono_raise_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2499 }
2500
2501 static gboolean
2502 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2503 {
2504         if (managed)
2505                 return TRUE;
2506
2507         if (m->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
2508                 m->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
2509                 m->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH)
2510         {
2511                 *((gboolean*)data) = TRUE;
2512                 return TRUE;
2513         }
2514         return FALSE;
2515 }
2516
2517 static gboolean
2518 is_running_protected_wrapper (void)
2519 {
2520         gboolean found = FALSE;
2521         mono_stack_walk (find_wrapper, &found);
2522         return found;
2523 }
2524
2525 void mono_thread_stop (MonoThread *thread)
2526 {
2527         ensure_synch_cs_set (thread);
2528
2529         EnterCriticalSection (thread->synch_cs);
2530
2531         if ((thread->state & ThreadState_StopRequested) != 0 ||
2532                 (thread->state & ThreadState_Stopped) != 0)
2533         {
2534                 LeaveCriticalSection (thread->synch_cs);
2535                 return;
2536         }
2537
2538         /* Make sure the thread is awake */
2539         mono_thread_resume (thread);
2540
2541         thread->state |= ThreadState_StopRequested;
2542         thread->state &= ~ThreadState_AbortRequested;
2543
2544         LeaveCriticalSection (thread->synch_cs);
2545
2546         signal_thread_state_change (thread);
2547 }
2548
2549 gint8
2550 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2551 {
2552         return *((volatile gint8 *) (ptr));
2553 }
2554
2555 gint16
2556 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2557 {
2558         return *((volatile gint16 *) (ptr));
2559 }
2560
2561 gint32
2562 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2563 {
2564         return *((volatile gint32 *) (ptr));
2565 }
2566
2567 gint64
2568 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2569 {
2570         return *((volatile gint64 *) (ptr));
2571 }
2572
2573 void *
2574 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2575 {
2576         return (void *)  *((volatile void **) ptr);
2577 }
2578
2579 void
2580 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2581 {
2582         *((volatile gint8 *) ptr) = value;
2583 }
2584
2585 void
2586 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2587 {
2588         *((volatile gint16 *) ptr) = value;
2589 }
2590
2591 void
2592 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2593 {
2594         *((volatile gint32 *) ptr) = value;
2595 }
2596
2597 void
2598 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2599 {
2600         *((volatile gint64 *) ptr) = value;
2601 }
2602
2603 void
2604 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2605 {
2606         *((volatile void **) ptr) = value;
2607 }
2608
2609 void
2610 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, void *value)
2611 {
2612         mono_gc_wbarrier_generic_store (ptr, value);
2613 }
2614
2615 void mono_thread_init (MonoThreadStartCB start_cb,
2616                        MonoThreadAttachCB attach_cb)
2617 {
2618         MONO_GC_REGISTER_ROOT (small_id_table);
2619         InitializeCriticalSection(&threads_mutex);
2620         InitializeCriticalSection(&interlocked_mutex);
2621         InitializeCriticalSection(&contexts_mutex);
2622         InitializeCriticalSection(&delayed_free_table_mutex);
2623         InitializeCriticalSection(&small_id_mutex);
2624
2625         background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2626         g_assert(background_change_event != NULL);
2627
2628         mono_init_static_data_info (&thread_static_info);
2629         mono_init_static_data_info (&context_static_info);
2630
2631         current_object_key=TlsAlloc();
2632         THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2633
2634         mono_thread_start_cb = start_cb;
2635         mono_thread_attach_cb = attach_cb;
2636
2637         delayed_free_table = g_array_new (FALSE, FALSE, sizeof (DelayedFreeItem));
2638
2639         /* Get a pseudo handle to the current process.  This is just a
2640          * kludge so that wapi can build a process handle if needed.
2641          * As a pseudo handle is returned, we don't need to clean
2642          * anything up.
2643          */
2644         GetCurrentProcess ();
2645 }
2646
2647 void mono_thread_cleanup (void)
2648 {
2649         mono_thread_hazardous_try_free_all ();
2650
2651 #if !defined(PLATFORM_WIN32) && !defined(RUN_IN_SUBTHREAD)
2652         /* The main thread must abandon any held mutexes (particularly
2653          * important for named mutexes as they are shared across
2654          * processes, see bug 74680.)  This will happen when the
2655          * thread exits, but if it's not running in a subthread it
2656          * won't exit in time.
2657          */
2658         /* Using non-w32 API is a nasty kludge, but I couldn't find
2659          * anything in the documentation that would let me do this
2660          * here yet still be safe to call on windows.
2661          */
2662         _wapi_thread_signal_self (mono_environment_exitcode_get ());
2663 #endif
2664
2665 #if 0
2666         /* This stuff needs more testing, it seems one of these
2667          * critical sections can be locked when mono_thread_cleanup is
2668          * called.
2669          */
2670         DeleteCriticalSection (&threads_mutex);
2671         DeleteCriticalSection (&interlocked_mutex);
2672         DeleteCriticalSection (&contexts_mutex);
2673         DeleteCriticalSection (&delayed_free_table_mutex);
2674         DeleteCriticalSection (&small_id_mutex);
2675         CloseHandle (background_change_event);
2676 #endif
2677
2678         g_array_free (delayed_free_table, TRUE);
2679         delayed_free_table = NULL;
2680
2681         TlsFree (current_object_key);
2682 }
2683
2684 void
2685 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2686 {
2687         mono_thread_cleanup_fn = func;
2688 }
2689
2690 void
2691 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2692 {
2693         thread->manage_callback = func;
2694 }
2695
2696 void mono_threads_install_notify_pending_exc (MonoThreadNotifyPendingExcFunc func)
2697 {
2698         mono_thread_notify_pending_exc_fn = func;
2699 }
2700
2701 G_GNUC_UNUSED
2702 static void print_tids (gpointer key, gpointer value, gpointer user)
2703 {
2704         /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2705          * sizeof(uint) and a cast to uint would overflow
2706          */
2707         /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2708          * print this as a pointer.
2709          */
2710         g_message ("Waiting for: %p", key);
2711 }
2712
2713 struct wait_data
2714 {
2715         HANDLE handles[MAXIMUM_WAIT_OBJECTS];
2716         MonoThread *threads[MAXIMUM_WAIT_OBJECTS];
2717         guint32 num;
2718 };
2719
2720 static void wait_for_tids (struct wait_data *wait, guint32 timeout)
2721 {
2722         guint32 i, ret;
2723
2724         THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2725
2726         ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, FALSE);
2727
2728         if(ret==WAIT_FAILED) {
2729                 /* See the comment in build_wait_tids() */
2730                 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2731                 return;
2732         }
2733
2734         for(i=0; i<wait->num; i++)
2735                 CloseHandle (wait->handles[i]);
2736
2737         if (ret == WAIT_TIMEOUT)
2738                 return;
2739
2740         for(i=0; i<wait->num; i++) {
2741                 gsize tid = wait->threads[i]->tid;
2742
2743                 mono_threads_lock ();
2744                 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2745                         /* This thread must have been killed, because
2746                          * it hasn't cleaned itself up. (It's just
2747                          * possible that the thread exited before the
2748                          * parent thread had a chance to store the
2749                          * handle, and now there is another pointer to
2750                          * the already-exited thread stored.  In this
2751                          * case, we'll just get two
2752                          * mono_profiler_thread_end() calls for the
2753                          * same thread.)
2754                          */
2755
2756                         mono_threads_unlock ();
2757                         THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
2758                         thread_cleanup (wait->threads[i]);
2759                 } else {
2760                         mono_threads_unlock ();
2761                 }
2762         }
2763 }
2764
2765 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
2766 {
2767         guint32 i, ret, count;
2768
2769         THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2770
2771         /* Add the thread state change event, so it wakes up if a thread changes
2772          * to background mode.
2773          */
2774         count = wait->num;
2775         if (count < MAXIMUM_WAIT_OBJECTS) {
2776                 wait->handles [count] = background_change_event;
2777                 count++;
2778         }
2779
2780         ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, FALSE);
2781
2782         if(ret==WAIT_FAILED) {
2783                 /* See the comment in build_wait_tids() */
2784                 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2785                 return;
2786         }
2787
2788         for(i=0; i<wait->num; i++)
2789                 CloseHandle (wait->handles[i]);
2790
2791         if (ret == WAIT_TIMEOUT)
2792                 return;
2793
2794         if (ret < wait->num) {
2795                 gsize tid = wait->threads[ret]->tid;
2796                 mono_threads_lock ();
2797                 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2798                         /* See comment in wait_for_tids about thread cleanup */
2799                         mono_threads_unlock ();
2800                         THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
2801                         thread_cleanup (wait->threads [ret]);
2802                 } else
2803                         mono_threads_unlock ();
2804         }
2805 }
2806
2807 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
2808 {
2809         struct wait_data *wait=(struct wait_data *)user;
2810
2811         if(wait->num<MAXIMUM_WAIT_OBJECTS) {
2812                 HANDLE handle;
2813                 MonoThread *thread=(MonoThread *)value;
2814
2815                 /* Ignore background threads, we abort them later */
2816                 /* Do not lock here since it is not needed and the caller holds threads_lock */
2817                 if (thread->state & ThreadState_Background) {
2818                         THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2819                         return; /* just leave, ignore */
2820                 }
2821
2822                 if (mono_gc_is_finalizer_thread (thread)) {
2823                         THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2824                         return;
2825                 }
2826
2827                 if (thread == mono_thread_current ()) {
2828                         THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2829                         return;
2830                 }
2831
2832                 if (thread == mono_thread_get_main ()) {
2833                         THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2834                         return;
2835                 }
2836
2837                 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
2838                         THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
2839                         return;
2840                 }
2841
2842                 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2843                 if (handle == NULL) {
2844                         THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2845                         return;
2846                 }
2847
2848                 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
2849                 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread) == TRUE)) {
2850                         wait->handles[wait->num]=handle;
2851                         wait->threads[wait->num]=thread;
2852                         wait->num++;
2853
2854                         THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2855                 } else {
2856                         THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
2857                 }
2858
2859
2860         } else {
2861                 /* Just ignore the rest, we can't do anything with
2862                  * them yet
2863                  */
2864         }
2865 }
2866
2867 static gboolean
2868 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
2869 {
2870         struct wait_data *wait=(struct wait_data *)user;
2871         gsize self = GetCurrentThreadId ();
2872         MonoThread *thread = (MonoThread *) value;
2873         HANDLE handle;
2874
2875         if (wait->num >= MAXIMUM_WAIT_OBJECTS)
2876                 return FALSE;
2877
2878         /* The finalizer thread is not a background thread */
2879         if (thread->tid != self && (thread->state & ThreadState_Background) != 0 &&
2880                 !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
2881
2882                 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
2883                 if (handle == NULL)
2884                         return FALSE;
2885
2886                 /* printf ("A: %d\n", wait->num); */
2887                 wait->handles[wait->num]=thread->handle;
2888                 wait->threads[wait->num]=thread;
2889                 wait->num++;
2890
2891                 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
2892                 mono_thread_stop (thread);
2893                 return TRUE;
2894         }
2895
2896         return (thread->tid != self && !mono_gc_is_finalizer_thread (thread));
2897 }
2898
2899 /**
2900  * mono_threads_set_shutting_down:
2901  *
2902  * Is called by a thread that wants to shut down Mono. If the runtime is already
2903  * shutting down, the calling thread is suspended/stopped, and this function never
2904  * returns.
2905  */
2906 void
2907 mono_threads_set_shutting_down (void)
2908 {
2909         MonoThread *current_thread = mono_thread_current ();
2910
2911         mono_threads_lock ();
2912
2913         if (shutting_down) {
2914                 mono_threads_unlock ();
2915
2916                 /* Make sure we're properly suspended/stopped */
2917
2918                 EnterCriticalSection (current_thread->synch_cs);
2919
2920                 if ((current_thread->state & ThreadState_SuspendRequested) ||
2921                     (current_thread->state & ThreadState_AbortRequested) ||
2922                     (current_thread->state & ThreadState_StopRequested)) {
2923                         LeaveCriticalSection (current_thread->synch_cs);
2924                         mono_thread_execute_interruption (current_thread);
2925                 } else {
2926                         current_thread->state |= ThreadState_Stopped;
2927                         LeaveCriticalSection (current_thread->synch_cs);
2928                 }
2929
2930                 /* Wake up other threads potentially waiting for us */
2931                 ExitThread (0);
2932         } else {
2933                 shutting_down = TRUE;
2934
2935                 /* Not really a background state change, but this will
2936                  * interrupt the main thread if it is waiting for all
2937                  * the other threads.
2938                  */
2939                 SetEvent (background_change_event);
2940
2941                 mono_threads_unlock ();
2942         }
2943 }
2944
2945 /**
2946  * mono_threads_is_shutting_down:
2947  *
2948  * Returns whether a thread has commenced shutdown of Mono.  Note that
2949  * if the function returns FALSE the caller must not assume that
2950  * shutdown is not in progress, because the situation might have
2951  * changed since the function returned.  For that reason this function
2952  * is of very limited utility.
2953  */
2954 gboolean
2955 mono_threads_is_shutting_down (void)
2956 {
2957         return shutting_down;
2958 }
2959
2960 void mono_thread_manage (void)
2961 {
2962         struct wait_data *wait=g_new0 (struct wait_data, 1);
2963
2964         /* join each thread that's still running */
2965         THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
2966
2967         mono_threads_lock ();
2968         if(threads==NULL) {
2969                 THREAD_DEBUG (g_message("%s: No threads", __func__));
2970                 mono_threads_unlock ();
2971                 g_free (wait);
2972                 return;
2973         }
2974         mono_threads_unlock ();
2975
2976         do {
2977                 mono_threads_lock ();
2978                 if (shutting_down) {
2979                         /* somebody else is shutting down */
2980                         mono_threads_unlock ();
2981                         break;
2982                 }
2983                 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
2984                         mono_g_hash_table_foreach (threads, print_tids, NULL));
2985
2986                 ResetEvent (background_change_event);
2987                 wait->num=0;
2988                 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
2989                 mono_threads_unlock ();
2990                 if(wait->num>0) {
2991                         /* Something to wait for */
2992                         wait_for_tids_or_state_change (wait, INFINITE);
2993                 }
2994                 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
2995         } while(wait->num>0);
2996
2997         mono_threads_set_shutting_down ();
2998
2999         /* No new threads will be created after this point */
3000
3001         mono_runtime_set_shutting_down ();
3002
3003         THREAD_DEBUG (g_message ("%s: threadpool cleanup", __func__));
3004         mono_thread_pool_cleanup ();
3005
3006         /*
3007          * Remove everything but the finalizer thread and self.
3008          * Also abort all the background threads
3009          * */
3010         do {
3011                 mono_threads_lock ();
3012
3013                 wait->num = 0;
3014                 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3015
3016                 mono_threads_unlock ();
3017
3018                 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3019                 if(wait->num>0) {
3020                         /* Something to wait for */
3021                         wait_for_tids (wait, INFINITE);
3022                 }
3023         } while (wait->num > 0);
3024
3025         /*
3026          * give the subthreads a chance to really quit (this is mainly needed
3027          * to get correct user and system times from getrusage/wait/time(1)).
3028          * This could be removed if we avoid pthread_detach() and use pthread_join().
3029          */
3030 #ifndef PLATFORM_WIN32
3031         sched_yield ();
3032 #endif
3033
3034         g_free (wait);
3035 }
3036
3037 static void terminate_thread (gpointer key, gpointer value, gpointer user)
3038 {
3039         MonoThread *thread=(MonoThread *)value;
3040
3041         if(thread->tid != (gsize)user) {
3042                 /*TerminateThread (thread->handle, -1);*/
3043         }
3044 }
3045
3046 void mono_thread_abort_all_other_threads (void)
3047 {
3048         gsize self = GetCurrentThreadId ();
3049
3050         mono_threads_lock ();
3051         THREAD_DEBUG (g_message ("%s: There are %d threads to abort", __func__,
3052                                  mono_g_hash_table_size (threads));
3053                       mono_g_hash_table_foreach (threads, print_tids, NULL));
3054
3055         mono_g_hash_table_foreach (threads, terminate_thread, (gpointer)self);
3056
3057         mono_threads_unlock ();
3058 }
3059
3060 static void
3061 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3062 {
3063         MonoThread *thread = (MonoThread*)value;
3064         struct wait_data *wait = (struct wait_data*)user_data;
3065         HANDLE handle;
3066
3067         /*
3068          * We try to exclude threads early, to avoid running into the MAXIMUM_WAIT_OBJECTS
3069          * limitation.
3070          * This needs no locking.
3071          */
3072         if ((thread->state & ThreadState_Suspended) != 0 ||
3073                 (thread->state & ThreadState_Stopped) != 0)
3074                 return;
3075
3076         if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3077                 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3078                 if (handle == NULL)
3079                         return;
3080
3081                 wait->handles [wait->num] = handle;
3082                 wait->threads [wait->num] = thread;
3083                 wait->num++;
3084         }
3085 }
3086
3087 /*
3088  * mono_thread_suspend_all_other_threads:
3089  *
3090  *  Suspend all managed threads except the finalizer thread and this thread. It is
3091  * not possible to resume them later.
3092  */
3093 void mono_thread_suspend_all_other_threads (void)
3094 {
3095         struct wait_data *wait = g_new0 (struct wait_data, 1);
3096         int i;
3097         gsize self = GetCurrentThreadId ();
3098         gpointer *events;
3099         guint32 eventidx = 0;
3100         gboolean starting, finished;
3101
3102         /*
3103          * The other threads could be in an arbitrary state at this point, i.e.
3104          * they could be starting up, shutting down etc. This means that there could be
3105          * threads which are not even in the threads hash table yet.
3106          */
3107
3108         /*
3109          * First we set a barrier which will be checked by all threads before they
3110          * are added to the threads hash table, and they will exit if the flag is set.
3111          * This ensures that no threads could be added to the hash later.
3112          * We will use shutting_down as the barrier for now.
3113          */
3114         g_assert (shutting_down);
3115
3116         /*
3117          * We make multiple calls to WaitForMultipleObjects since:
3118          * - we can only wait for MAXIMUM_WAIT_OBJECTS threads
3119          * - some threads could exit without becoming suspended
3120          */
3121         finished = FALSE;
3122         while (!finished) {
3123                 /*
3124                  * Make a copy of the hashtable since we can't do anything with
3125                  * threads while threads_mutex is held.
3126                  */
3127                 wait->num = 0;
3128                 mono_threads_lock ();
3129                 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3130                 mono_threads_unlock ();
3131
3132                 events = g_new0 (gpointer, wait->num);
3133                 eventidx = 0;
3134                 /* Get the suspended events that we'll be waiting for */
3135                 for (i = 0; i < wait->num; ++i) {
3136                         MonoThread *thread = wait->threads [i];
3137                         gboolean signal_suspend = FALSE;
3138
3139                         if ((thread->tid == self) || mono_gc_is_finalizer_thread (thread)) {
3140                                 //CloseHandle (wait->handles [i]);
3141                                 wait->threads [i] = NULL; /* ignore this thread in next loop */
3142                                 continue;
3143                         }
3144
3145                         ensure_synch_cs_set (thread);
3146
3147                         EnterCriticalSection (thread->synch_cs);
3148
3149                         if (thread->suspended_event == NULL) {
3150                                 thread->suspended_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3151                                 if (thread->suspended_event == NULL) {
3152                                         /* Forget this one and go on to the next */
3153                                         LeaveCriticalSection (thread->synch_cs);
3154                                         continue;
3155                                 }
3156                         }
3157
3158                         if ((thread->state & ThreadState_Suspended) != 0 ||
3159                                 (thread->state & ThreadState_StopRequested) != 0 ||
3160                                 (thread->state & ThreadState_Stopped) != 0) {
3161                                 LeaveCriticalSection (thread->synch_cs);
3162                                 CloseHandle (wait->handles [i]);
3163                                 wait->threads [i] = NULL; /* ignore this thread in next loop */
3164                                 continue;
3165                         }
3166
3167                         if ((thread->state & ThreadState_SuspendRequested) == 0)
3168                                 signal_suspend = TRUE;
3169
3170                         events [eventidx++] = thread->suspended_event;
3171
3172                         /* Convert abort requests into suspend requests */
3173                         if ((thread->state & ThreadState_AbortRequested) != 0)
3174                                 thread->state &= ~ThreadState_AbortRequested;
3175
3176                         thread->state |= ThreadState_SuspendRequested;
3177
3178                         LeaveCriticalSection (thread->synch_cs);
3179
3180                         /* Signal the thread to suspend */
3181                         if (signal_suspend)
3182                                 signal_thread_state_change (thread);
3183                 }
3184
3185                 if (eventidx > 0) {
3186                         WaitForMultipleObjectsEx (eventidx, events, TRUE, 100, FALSE);
3187                         for (i = 0; i < wait->num; ++i) {
3188                                 MonoThread *thread = wait->threads [i];
3189
3190                                 if (thread == NULL)
3191                                         continue;
3192
3193                                 EnterCriticalSection (thread->synch_cs);
3194                                 if ((thread->state & ThreadState_Suspended) != 0) {
3195                                         CloseHandle (thread->suspended_event);
3196                                         thread->suspended_event = NULL;
3197                                 }
3198                                 LeaveCriticalSection (thread->synch_cs);
3199                         }
3200                 } else {
3201                         /*
3202                          * If there are threads which are starting up, we wait until they
3203                          * are suspended when they try to register in the threads hash.
3204                          * This is guaranteed to finish, since the threads which can create new
3205                          * threads get suspended after a while.
3206                          * FIXME: The finalizer thread can still create new threads.
3207                          */
3208                         mono_threads_lock ();
3209                         if (threads_starting_up)
3210                                 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3211                         else
3212                                 starting = FALSE;
3213                         mono_threads_unlock ();
3214                         if (starting)
3215                                 Sleep (100);
3216                         else
3217                                 finished = TRUE;
3218                 }
3219
3220                 g_free (events);
3221         }
3222
3223         g_free (wait);
3224 }
3225
3226 static void
3227 collect_threads (gpointer key, gpointer value, gpointer user_data)
3228 {
3229         MonoThread *thread = (MonoThread*)value;
3230         struct wait_data *wait = (struct wait_data*)user_data;
3231         HANDLE handle;
3232
3233         if (wait->num<MAXIMUM_WAIT_OBJECTS) {
3234                 handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3235                 if (handle == NULL)
3236                         return;
3237
3238                 wait->handles [wait->num] = handle;
3239                 wait->threads [wait->num] = thread;
3240                 wait->num++;
3241         }
3242 }
3243
3244 /**
3245  * mono_threads_request_thread_dump:
3246  *
3247  *   Ask all threads except the current to print their stacktrace to stdout.
3248  */
3249 void
3250 mono_threads_request_thread_dump (void)
3251 {
3252         struct wait_data *wait = g_new0 (struct wait_data, 1);
3253         int i;
3254
3255         /*
3256          * Make a copy of the hashtable since we can't do anything with
3257          * threads while threads_mutex is held.
3258          */
3259         mono_threads_lock ();
3260         mono_g_hash_table_foreach (threads, collect_threads, wait);
3261         mono_threads_unlock ();
3262
3263         for (i = 0; i < wait->num; ++i) {
3264                 MonoThread *thread = wait->threads [i];
3265
3266                 if (!mono_gc_is_finalizer_thread (thread) && (thread != mono_thread_current ()) && !thread->thread_dump_requested) {
3267                         thread->thread_dump_requested = TRUE;
3268
3269                         signal_thread_state_change (thread);
3270                 }
3271
3272                 CloseHandle (wait->handles [i]);
3273         }
3274 }
3275
3276 /*
3277  * mono_thread_push_appdomain_ref:
3278  *
3279  *   Register that the current thread may have references to objects in domain
3280  * @domain on its stack. Each call to this function should be paired with a
3281  * call to pop_appdomain_ref.
3282  */
3283 void
3284 mono_thread_push_appdomain_ref (MonoDomain *domain)
3285 {
3286         MonoThread *thread = mono_thread_current ();
3287
3288         if (thread) {
3289                 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3290                 mono_threads_lock ();
3291                 thread->appdomain_refs = g_slist_prepend (thread->appdomain_refs, domain);
3292                 mono_threads_unlock ();
3293         }
3294 }
3295
3296 void
3297 mono_thread_pop_appdomain_ref (void)
3298 {
3299         MonoThread *thread = mono_thread_current ();
3300
3301         if (thread) {
3302                 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3303                 mono_threads_lock ();
3304                 /* FIXME: How can the list be empty ? */
3305                 if (thread->appdomain_refs)
3306                         thread->appdomain_refs = g_slist_remove (thread->appdomain_refs, thread->appdomain_refs->data);
3307                 mono_threads_unlock ();
3308         }
3309 }
3310
3311 gboolean
3312 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3313 {
3314         gboolean res;
3315         mono_threads_lock ();
3316         res = g_slist_find (thread->appdomain_refs, domain) != NULL;
3317         mono_threads_unlock ();
3318         return res;
3319 }
3320
3321 typedef struct abort_appdomain_data {
3322         struct wait_data wait;
3323         MonoDomain *domain;
3324 } abort_appdomain_data;
3325
3326 static void
3327 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3328 {
3329         MonoThread *thread = (MonoThread*)value;
3330         abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3331         MonoDomain *domain = data->domain;
3332
3333         if (mono_thread_has_appdomain_ref (thread, domain)) {
3334                 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3335
3336                 if(data->wait.num<MAXIMUM_WAIT_OBJECTS) {
3337                         HANDLE handle = OpenThread (THREAD_ALL_ACCESS, TRUE, thread->tid);
3338                         if (handle == NULL)
3339                                 return;
3340                         data->wait.handles [data->wait.num] = handle;
3341                         data->wait.threads [data->wait.num] = thread;
3342                         data->wait.num++;
3343                 } else {
3344                         /* Just ignore the rest, we can't do anything with
3345                          * them yet
3346                          */
3347                 }
3348         }
3349 }
3350
3351 /*
3352  * mono_threads_abort_appdomain_threads:
3353  *
3354  *   Abort threads which has references to the given appdomain.
3355  */
3356 gboolean
3357 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3358 {
3359         abort_appdomain_data user_data;
3360         guint32 start_time;
3361         int orig_timeout = timeout;
3362         int i;
3363
3364         THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3365
3366         start_time = mono_msec_ticks ();
3367         do {
3368                 mono_threads_lock ();
3369
3370                 user_data.domain = domain;
3371                 user_data.wait.num = 0;
3372                 /* This shouldn't take any locks */
3373                 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3374                 mono_threads_unlock ();
3375
3376                 if (user_data.wait.num > 0) {
3377                         /* Abort the threads outside the threads lock */
3378                         for (i = 0; i < user_data.wait.num; ++i)
3379                                 ves_icall_System_Threading_Thread_Abort (user_data.wait.threads [i], NULL);
3380
3381                         /*
3382                          * We should wait for the threads either to abort, or to leave the
3383                          * domain. We can't do the latter, so we wait with a timeout.
3384                          */
3385                         wait_for_tids (&user_data.wait, 100);
3386                 }
3387
3388                 /* Update remaining time */
3389                 timeout -= mono_msec_ticks () - start_time;
3390                 start_time = mono_msec_ticks ();
3391
3392                 if (orig_timeout != -1 && timeout < 0)
3393                         return FALSE;
3394         }
3395         while (user_data.wait.num > 0);
3396
3397         THREAD_DEBUG (g_message ("%s: abort done", __func__));
3398
3399         return TRUE;
3400 }
3401
3402 static void
3403 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3404 {
3405         MonoThread *thread = (MonoThread*)value;
3406         MonoDomain *domain = (MonoDomain*)user_data;
3407         int i;
3408
3409         /* No locking needed here */
3410         /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3411
3412         if (thread->cached_culture_info) {
3413                 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3414                         MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3415                         if (obj && obj->vtable->domain == domain)
3416                                 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3417                 }
3418         }
3419 }
3420
3421 /*
3422  * mono_threads_clear_cached_culture:
3423  *
3424  *   Clear the cached_current_culture from all threads if it is in the
3425  * given appdomain.
3426  */
3427 void
3428 mono_threads_clear_cached_culture (MonoDomain *domain)
3429 {
3430         mono_threads_lock ();
3431         mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3432         mono_threads_unlock ();
3433 }
3434
3435 /*
3436  * mono_thread_get_undeniable_exception:
3437  *
3438  *   Return an exception which needs to be raised when leaving a catch clause.
3439  * This is used for undeniable exception propagation.
3440  */
3441 MonoException*
3442 mono_thread_get_undeniable_exception (void)
3443 {
3444         MonoThread *thread = mono_thread_current ();
3445
3446         MONO_ARCH_SAVE_REGS;
3447
3448         if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3449                 /*
3450                  * FIXME: Clear the abort exception and return an AppDomainUnloaded
3451                  * exception if the thread no longer references a dying appdomain.
3452                  */
3453                 thread->abort_exc->trace_ips = NULL;
3454                 thread->abort_exc->stack_trace = NULL;
3455                 return thread->abort_exc;
3456         }
3457
3458         return NULL;
3459 }
3460
3461 #define NUM_STATIC_DATA_IDX 8
3462 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3463         1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3464 };
3465
3466
3467 /*
3468  *  mono_alloc_static_data
3469  *
3470  *   Allocate memory blocks for storing threads or context static data
3471  */
3472 static void
3473 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset)
3474 {
3475         guint idx = (offset >> 24) - 1;
3476         int i;
3477
3478         gpointer* static_data = *static_data_ptr;
3479         if (!static_data) {
3480                 static_data = mono_gc_alloc_fixed (static_data_size [0], NULL);
3481                 *static_data_ptr = static_data;
3482                 static_data [0] = static_data;
3483         }
3484
3485         for (i = 1; i <= idx; ++i) {
3486                 if (static_data [i])
3487                         continue;
3488                 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], NULL);
3489         }
3490 }
3491
3492 /*
3493  *  mono_init_static_data_info
3494  *
3495  *   Initializes static data counters
3496  */
3497 static void mono_init_static_data_info (StaticDataInfo *static_data)
3498 {
3499         static_data->idx = 0;
3500         static_data->offset = 0;
3501         static_data->freelist = NULL;
3502 }
3503
3504 /*
3505  *  mono_alloc_static_data_slot
3506  *
3507  *   Generates an offset for static data. static_data contains the counters
3508  *  used to generate it.
3509  */
3510 static guint32
3511 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
3512 {
3513         guint32 offset;
3514
3515         if (!static_data->idx && !static_data->offset) {
3516                 /*
3517                  * we use the first chunk of the first allocation also as
3518                  * an array for the rest of the data
3519                  */
3520                 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
3521         }
3522         static_data->offset += align - 1;
3523         static_data->offset &= ~(align - 1);
3524         if (static_data->offset + size >= static_data_size [static_data->idx]) {
3525                 static_data->idx ++;
3526                 g_assert (size <= static_data_size [static_data->idx]);
3527                 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
3528                 static_data->offset = 0;
3529         }
3530         offset = static_data->offset | ((static_data->idx + 1) << 24);
3531         static_data->offset += size;
3532         return offset;
3533 }
3534
3535 /*
3536  * ensure thread static fields already allocated are valid for thread
3537  * This function is called when a thread is created or on thread attach.
3538  */
3539 static void
3540 thread_adjust_static_data (MonoThread *thread)
3541 {
3542         guint32 offset;
3543
3544         mono_threads_lock ();
3545         if (thread_static_info.offset || thread_static_info.idx > 0) {
3546                 /* get the current allocated size */
3547                 offset = thread_static_info.offset | ((thread_static_info.idx + 1) << 24);
3548                 mono_alloc_static_data (&(thread->static_data), offset);
3549         }
3550         mono_threads_unlock ();
3551 }
3552
3553 static void
3554 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3555 {
3556         MonoThread *thread = value;
3557         guint32 offset = GPOINTER_TO_UINT (user);
3558
3559         mono_alloc_static_data (&(thread->static_data), offset);
3560 }
3561
3562 static MonoThreadDomainTls*
3563 search_tls_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
3564 {
3565         MonoThreadDomainTls* prev = NULL;
3566         MonoThreadDomainTls* tmp = static_data->freelist;
3567         while (tmp) {
3568                 if (tmp->size == size) {
3569                         if (prev)
3570                                 prev->next = tmp->next;
3571                         else
3572                                 static_data->freelist = tmp->next;
3573                         return tmp;
3574                 }
3575                 tmp = tmp->next;
3576         }
3577         return NULL;
3578 }
3579
3580 /*
3581  * The offset for a special static variable is composed of three parts:
3582  * a bit that indicates the type of static data (0:thread, 1:context),
3583  * an index in the array of chunks of memory for the thread (thread->static_data)
3584  * and an offset in that chunk of mem. This allows allocating less memory in the
3585  * common case.
3586  */
3587
3588 guint32
3589 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align)
3590 {
3591         guint32 offset;
3592         if (static_type == SPECIAL_STATIC_THREAD)
3593         {
3594                 MonoThreadDomainTls *item;
3595                 mono_threads_lock ();
3596                 item = search_tls_slot_in_freelist (&thread_static_info, size, align);
3597                 /*g_print ("TLS alloc: %d in domain %p (total: %d), cached: %p\n", size, mono_domain_get (), thread_static_info.offset, item);*/
3598                 if (item) {
3599                         offset = item->offset;
3600                         g_free (item);
3601                 } else {
3602                         offset = mono_alloc_static_data_slot (&thread_static_info, size, align);
3603                 }
3604                 /* This can be called during startup */
3605                 if (threads != NULL)
3606                         mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
3607                 mono_threads_unlock ();
3608         }
3609         else
3610         {
3611                 g_assert (static_type == SPECIAL_STATIC_CONTEXT);
3612                 mono_contexts_lock ();
3613                 offset = mono_alloc_static_data_slot (&context_static_info, size, align);
3614                 mono_contexts_unlock ();
3615                 offset |= 0x80000000;   /* Set the high bit to indicate context static data */
3616         }
3617         return offset;
3618 }
3619
3620 gpointer
3621 mono_get_special_static_data (guint32 offset)
3622 {
3623         /* The high bit means either thread (0) or static (1) data. */
3624
3625         guint32 static_type = (offset & 0x80000000);
3626         int idx;
3627
3628         offset &= 0x7fffffff;
3629         idx = (offset >> 24) - 1;
3630
3631         if (static_type == 0)
3632         {
3633                 MonoThread *thread = mono_thread_current ();
3634                 return ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3635         }
3636         else
3637         {
3638                 /* Allocate static data block under demand, since we don't have a list
3639                 // of contexts
3640                 */
3641                 MonoAppContext *context = mono_context_get ();
3642                 if (!context->static_data || !context->static_data [idx]) {
3643                         mono_contexts_lock ();
3644                         mono_alloc_static_data (&(context->static_data), offset);
3645                         mono_contexts_unlock ();
3646                 }
3647                 return ((char*) context->static_data [idx]) + (offset & 0xffffff);
3648         }
3649 }
3650
3651 typedef struct {
3652         guint32 offset;
3653         guint32 size;
3654 } TlsOffsetSize;
3655
3656 static void
3657 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
3658 {
3659         MonoThread *thread = value;
3660         TlsOffsetSize *data = user;
3661         int idx = (data->offset >> 24) - 1;
3662         char *ptr;
3663
3664         if (!thread->static_data || !thread->static_data [idx])
3665                 return;
3666         ptr = ((char*) thread->static_data [idx]) + (data->offset & 0xffffff);
3667         memset (ptr, 0, data->size);
3668 }
3669
3670 static void
3671 do_free_special (gpointer key, gpointer value, gpointer data)
3672 {
3673         MonoClassField *field = key;
3674         guint32 offset = GPOINTER_TO_UINT (value);
3675         guint32 static_type = (offset & 0x80000000);
3676         gint32 align;
3677         guint32 size;
3678         size = mono_type_size (field->type, &align);
3679         /*g_print ("free %s , size: %d, offset: %x\n", field->name, size, offset);*/
3680         if (static_type == 0) {
3681                 TlsOffsetSize data;
3682                 MonoThreadDomainTls *item = g_new0 (MonoThreadDomainTls, 1);
3683                 data.offset = offset & 0x7fffffff;
3684                 data.size = size;
3685                 if (threads != NULL)
3686                         mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
3687                 item->offset = offset;
3688                 item->size = size;
3689                 item->next = thread_static_info.freelist;
3690                 thread_static_info.freelist = item;
3691         } else {
3692                 /* FIXME: free context static data as well */
3693         }
3694 }
3695
3696 void
3697 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
3698 {
3699         mono_threads_lock ();
3700         g_hash_table_foreach (special_static_fields, do_free_special, NULL);
3701         mono_threads_unlock ();
3702 }
3703
3704 static MonoClassField *local_slots = NULL;
3705
3706 typedef struct {
3707         /* local tls data to get locals_slot from a thread */
3708         guint32 offset;
3709         int idx;
3710         /* index in the locals_slot array */
3711         int slot;
3712 } LocalSlotID;
3713
3714 static void
3715 clear_local_slot (gpointer key, gpointer value, gpointer user_data)
3716 {
3717         LocalSlotID *sid = user_data;
3718         MonoThread *thread = (MonoThread*)value;
3719         MonoArray *slots_array;
3720         /*
3721          * the static field is stored at: ((char*) thread->static_data [idx]) + (offset & 0xffffff);
3722          * it is for the right domain, so we need to check if it is allocated an initialized
3723          * for the current thread.
3724          */
3725         /*g_print ("handling thread %p\n", thread);*/
3726         if (!thread->static_data || !thread->static_data [sid->idx])
3727                 return;
3728         slots_array = *(MonoArray **)(((char*) thread->static_data [sid->idx]) + (sid->offset & 0xffffff));
3729         if (!slots_array || sid->slot >= mono_array_length (slots_array))
3730                 return;
3731         mono_array_set (slots_array, MonoObject*, sid->slot, NULL);
3732 }
3733
3734 void
3735 mono_thread_free_local_slot_values (int slot, MonoBoolean thread_local)
3736 {
3737         MonoDomain *domain;
3738         LocalSlotID sid;
3739         sid.slot = slot;
3740         if (thread_local) {
3741                 void *addr = NULL;
3742                 if (!local_slots) {
3743                         local_slots = mono_class_get_field_from_name (mono_defaults.thread_class, "local_slots");
3744                         if (!local_slots) {
3745                                 g_warning ("local_slots field not found in Thread class");
3746                                 return;
3747                         }
3748                 }
3749                 domain = mono_domain_get ();
3750                 mono_domain_lock (domain);
3751                 if (domain->special_static_fields)
3752                         addr = g_hash_table_lookup (domain->special_static_fields, local_slots);
3753                 mono_domain_unlock (domain);
3754                 if (!addr)
3755                         return;
3756                 /*g_print ("freeing slot %d at %p\n", slot, addr);*/
3757                 sid.offset = GPOINTER_TO_UINT (addr);
3758                 sid.offset &= 0x7fffffff;
3759                 sid.idx = (sid.offset >> 24) - 1;
3760                 mono_threads_lock ();
3761                 mono_g_hash_table_foreach (threads, clear_local_slot, &sid);
3762                 mono_threads_unlock ();
3763         } else {
3764                 /* FIXME: clear the slot for MonoAppContexts, too */
3765         }
3766 }
3767
3768 #ifdef PLATFORM_WIN32
3769 static void CALLBACK dummy_apc (ULONG_PTR param)
3770 {
3771 }
3772 #else
3773 static guint32 dummy_apc (gpointer param)
3774 {
3775         return 0;
3776 }
3777 #endif
3778
3779 /*
3780  * mono_thread_execute_interruption
3781  *
3782  * Performs the operation that the requested thread state requires (abort,
3783  * suspend or stop)
3784  */
3785 static MonoException* mono_thread_execute_interruption (MonoThread *thread)
3786 {
3787         ensure_synch_cs_set (thread);
3788
3789         EnterCriticalSection (thread->synch_cs);
3790
3791         /* MonoThread::interruption_requested can only be changed with atomics */
3792         if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
3793                 /* this will consume pending APC calls */
3794                 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
3795                 InterlockedDecrement (&thread_interruption_requested);
3796 #ifndef PLATFORM_WIN32
3797                 /* Clear the interrupted flag of the thread so it can wait again */
3798                 wapi_clear_interruption ();
3799 #endif
3800         }
3801
3802         if ((thread->state & ThreadState_AbortRequested) != 0) {
3803                 LeaveCriticalSection (thread->synch_cs);
3804                 if (thread->abort_exc == NULL) {
3805                         /*
3806                          * This might be racy, but it has to be called outside the lock
3807                          * since it calls managed code.
3808                          */
3809                         MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
3810                 }
3811                 return thread->abort_exc;
3812         }
3813         else if ((thread->state & ThreadState_SuspendRequested) != 0) {
3814                 thread->state &= ~ThreadState_SuspendRequested;
3815                 thread->state |= ThreadState_Suspended;
3816                 thread->suspend_event = CreateEvent (NULL, TRUE, FALSE, NULL);
3817                 if (thread->suspend_event == NULL) {
3818                         LeaveCriticalSection (thread->synch_cs);
3819                         return(NULL);
3820                 }
3821                 if (thread->suspended_event)
3822                         SetEvent (thread->suspended_event);
3823
3824                 LeaveCriticalSection (thread->synch_cs);
3825
3826                 if (shutting_down) {
3827                         /* After we left the lock, the runtime might shut down so everything becomes invalid */
3828                         for (;;)
3829                                 Sleep (1000);
3830                 }
3831
3832                 WaitForSingleObject (thread->suspend_event, INFINITE);
3833
3834                 EnterCriticalSection (thread->synch_cs);
3835
3836                 CloseHandle (thread->suspend_event);
3837                 thread->suspend_event = NULL;
3838                 thread->state &= ~ThreadState_Suspended;
3839
3840                 /* The thread that requested the resume will have replaced this event
3841                  * and will be waiting for it
3842                  */
3843                 SetEvent (thread->resume_event);
3844
3845                 LeaveCriticalSection (thread->synch_cs);
3846
3847                 return NULL;
3848         }
3849         else if ((thread->state & ThreadState_StopRequested) != 0) {
3850                 /* FIXME: do this through the JIT? */
3851
3852                 LeaveCriticalSection (thread->synch_cs);
3853
3854                 mono_thread_exit ();
3855                 return NULL;
3856         } else if (thread->thread_interrupt_requested) {
3857
3858                 thread->thread_interrupt_requested = FALSE;
3859                 LeaveCriticalSection (thread->synch_cs);
3860
3861                 return(mono_get_exception_thread_interrupted ());
3862         }
3863
3864         LeaveCriticalSection (thread->synch_cs);
3865
3866         return NULL;
3867 }
3868
3869 /*
3870  * mono_thread_request_interruption
3871  *
3872  * A signal handler can call this method to request the interruption of a
3873  * thread. The result of the interruption will depend on the current state of
3874  * the thread. If the result is an exception that needs to be throw, it is
3875  * provided as return value.
3876  */
3877 MonoException*
3878 mono_thread_request_interruption (gboolean running_managed)
3879 {
3880         MonoThread *thread = mono_thread_current ();
3881
3882         /* The thread may already be stopping */
3883         if (thread == NULL)
3884                 return NULL;
3885
3886 #ifdef PLATFORM_WIN32
3887         if (thread->interrupt_on_stop &&
3888                 thread->state & ThreadState_StopRequested &&
3889                 thread->state & ThreadState_Background)
3890                 ExitThread (1);
3891 #endif
3892
3893         if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
3894                 return NULL;
3895
3896         if (!running_managed || is_running_protected_wrapper ()) {
3897                 /* Can't stop while in unmanaged code. Increase the global interruption
3898                    request count. When exiting the unmanaged method the count will be
3899                    checked and the thread will be interrupted. */
3900
3901                 InterlockedIncrement (&thread_interruption_requested);
3902
3903                 if (mono_thread_notify_pending_exc_fn && !running_managed)
3904                         /* The JIT will notify the thread about the interruption */
3905                         /* This shouldn't take any locks */
3906                         mono_thread_notify_pending_exc_fn ();
3907
3908                 /* this will awake the thread if it is in WaitForSingleObject
3909                    or similar */
3910                 /* Our implementation of this function ignores the func argument */
3911                 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, NULL);
3912                 return NULL;
3913         }
3914         else {
3915                 return mono_thread_execute_interruption (thread);
3916         }
3917 }
3918
3919 gboolean mono_thread_interruption_requested ()
3920 {
3921         if (thread_interruption_requested) {
3922                 MonoThread *thread = mono_thread_current ();
3923                 /* The thread may already be stopping */
3924                 if (thread != NULL)
3925                         return (thread->interruption_requested);
3926         }
3927         return FALSE;
3928 }
3929
3930 static void mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
3931 {
3932         MonoThread *thread = mono_thread_current ();
3933
3934         /* The thread may already be stopping */
3935         if (thread == NULL)
3936                 return;
3937
3938         mono_debugger_check_interruption ();
3939
3940         if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
3941                 MonoException* exc = mono_thread_execute_interruption (thread);
3942                 if (exc) mono_raise_exception (exc);
3943         }
3944 }
3945
3946 /*
3947  * Performs the interruption of the current thread, if one has been requested,
3948  * and the thread is not running a protected wrapper.
3949  */
3950 void mono_thread_interruption_checkpoint ()
3951 {
3952         mono_thread_interruption_checkpoint_request (FALSE);
3953 }
3954
3955 /*
3956  * Performs the interruption of the current thread, if one has been requested.
3957  */
3958 void mono_thread_force_interruption_checkpoint ()
3959 {
3960         mono_thread_interruption_checkpoint_request (TRUE);
3961 }
3962
3963 /*
3964  * mono_thread_get_and_clear_pending_exception:
3965  *
3966  *   Return any pending exceptions for the current thread and clear it as a side effect.
3967  */
3968 MonoException*
3969 mono_thread_get_and_clear_pending_exception (void)
3970 {
3971         MonoThread *thread = mono_thread_current ();
3972
3973         /* The thread may already be stopping */
3974         if (thread == NULL)
3975                 return NULL;
3976
3977         if (thread->interruption_requested && !is_running_protected_wrapper ()) {
3978                 return mono_thread_execute_interruption (thread);
3979         }
3980
3981         if (thread->pending_exception) {
3982                 MonoException *exc = thread->pending_exception;
3983
3984                 thread->pending_exception = NULL;
3985                 return exc;
3986         }
3987
3988         return NULL;
3989 }
3990
3991 /*
3992  * mono_set_pending_exception:
3993  *
3994  *   Set the pending exception of the current thread to EXC. On platforms which
3995  * support it, the exception will be thrown when execution returns to managed code.
3996  * On other platforms, this function is equivalent to mono_raise_exception ().
3997  * Internal calls which report exceptions using this function instead of
3998  * raise_exception () might be called by JITted code using a more efficient calling
3999  * convention.
4000  */
4001 void
4002 mono_set_pending_exception (MonoException *exc)
4003 {
4004         MonoThread *thread = mono_thread_current ();
4005
4006         /* The thread may already be stopping */
4007         if (thread == NULL)
4008                 return;
4009
4010         if (mono_thread_notify_pending_exc_fn) {
4011                 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4012
4013                 mono_thread_notify_pending_exc_fn ();
4014         } else {
4015                 /* No way to notify the JIT about the exception, have to throw it now */
4016                 mono_raise_exception (exc);
4017         }
4018 }
4019
4020 /**
4021  * mono_thread_interruption_request_flag:
4022  *
4023  * Returns the address of a flag that will be non-zero if an interruption has
4024  * been requested for a thread. The thread to interrupt may not be the current
4025  * thread, so an additional call to mono_thread_interruption_requested() or
4026  * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4027  * zero.
4028  */
4029 gint32* mono_thread_interruption_request_flag ()
4030 {
4031         return &thread_interruption_requested;
4032 }
4033
4034 void
4035 mono_thread_init_apartment_state (void)
4036 {
4037         MonoThread* thread;
4038         thread = mono_thread_current ();
4039
4040 #ifdef PLATFORM_WIN32
4041         /* Positive return value indicates success, either
4042          * S_OK if this is first CoInitialize call, or
4043          * S_FALSE if CoInitialize already called, but with same
4044          * threading model. A negative value indicates failure,
4045          * probably due to trying to change the threading model.
4046          */
4047         if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4048                         ? COINIT_APARTMENTTHREADED
4049                         : COINIT_MULTITHREADED) < 0) {
4050                 thread->apartment_state = ThreadApartmentState_Unknown;
4051         }
4052 #endif
4053 }
4054
4055 void
4056 mono_thread_cleanup_apartment_state (void)
4057 {
4058 #ifdef PLATFORM_WIN32
4059         MonoThread* thread;
4060         thread = mono_thread_current ();
4061
4062         if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4063                 CoUninitialize ();
4064         }
4065 #endif
4066 }
4067
4068 void
4069 mono_thread_set_state (MonoThread *thread, MonoThreadState state)
4070 {
4071         ensure_synch_cs_set (thread);
4072
4073         EnterCriticalSection (thread->synch_cs);
4074         thread->state |= state;
4075         LeaveCriticalSection (thread->synch_cs);
4076 }
4077
4078 void
4079 mono_thread_clr_state (MonoThread *thread, MonoThreadState state)
4080 {
4081         ensure_synch_cs_set (thread);
4082
4083         EnterCriticalSection (thread->synch_cs);
4084         thread->state &= ~state;
4085         LeaveCriticalSection (thread->synch_cs);
4086 }
4087
4088 gboolean
4089 mono_thread_test_state (MonoThread *thread, MonoThreadState test)
4090 {
4091         gboolean ret = FALSE;
4092
4093         ensure_synch_cs_set (thread);
4094
4095         EnterCriticalSection (thread->synch_cs);
4096
4097         if ((thread->state & test) != 0) {
4098                 ret = TRUE;
4099         }
4100
4101         LeaveCriticalSection (thread->synch_cs);
4102
4103         return ret;
4104 }
4105
4106 static MonoClassField *execution_context_field;
4107
4108 static MonoObject**
4109 get_execution_context_addr (void)
4110 {
4111         MonoDomain *domain = mono_domain_get ();
4112         guint32 offset;
4113
4114         if (!execution_context_field) {
4115                 execution_context_field = mono_class_get_field_from_name (mono_defaults.thread_class,
4116                                 "_ec");
4117                 g_assert (execution_context_field);
4118         }
4119
4120         g_assert (mono_class_try_get_vtable (domain, mono_defaults.appdomain_class));
4121
4122         mono_domain_lock (domain);
4123         offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, execution_context_field));
4124         mono_domain_unlock (domain);
4125         g_assert (offset);
4126
4127         return (MonoObject**) mono_get_special_static_data (offset);
4128 }
4129
4130 MonoObject*
4131 mono_thread_get_execution_context (void)
4132 {
4133         return *get_execution_context_addr ();
4134 }
4135
4136 void
4137 mono_thread_set_execution_context (MonoObject *ec)
4138 {
4139         *get_execution_context_addr () = ec;
4140 }
4141
4142 static gboolean has_tls_get = FALSE;
4143
4144 void
4145 mono_runtime_set_has_tls_get (gboolean val)
4146 {
4147         has_tls_get = val;
4148 }
4149
4150 gboolean
4151 mono_runtime_has_tls_get (void)
4152 {
4153         return has_tls_get;
4154 }