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