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  * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
  12  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
  13  */
  14
  15 #include <config.h>
  16
  17 #include <glib.h>
  18 #include <string.h>
  19
  20 #include <mono/metadata/object.h>
  21 #include <mono/metadata/domain-internals.h>
  22 #include <mono/metadata/profiler-private.h>
  23 #include <mono/metadata/threads.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-internals.h>
  29 #include <mono/metadata/marshal.h>
  30 #include <mono/metadata/runtime.h>
  31 #include <mono/io-layer/io-layer.h>
  32 #include <mono/metadata/object-internals.h>
  33 #include <mono/metadata/mono-debug-debugger.h>
  34 #include <mono/utils/monobitset.h>
  35 #include <mono/utils/mono-compiler.h>
  36 #include <mono/utils/mono-mmap.h>
  37 #include <mono/utils/mono-membar.h>
  38 #include <mono/utils/mono-time.h>
  39 #include <mono/utils/mono-threads.h>
  40 #include <mono/utils/mono-threads-coop.h>
  41 #include <mono/utils/hazard-pointer.h>
  42 #include <mono/utils/mono-tls.h>
  43 #include <mono/utils/atomic.h>
  44 #include <mono/utils/mono-memory-model.h>
  45 #include <mono/utils/mono-threads-coop.h>
  46 #include <mono/utils/mono-error-internals.h>
  47 #include <mono/utils/w32handle.h>
  48
  49 #include <mono/metadata/gc-internals.h>
  50 #include <mono/metadata/reflection-internals.h>
  51 #include <mono/metadata/abi-details.h>
  52
  53 #ifdef HAVE_SIGNAL_H
  54 #include <signal.h>
  55 #endif
  56
  57 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
  58 #define USE_TKILL_ON_ANDROID 1
  59 #endif
  60
  61 #ifdef PLATFORM_ANDROID
  62 #include <errno.h>
  63
  64 #ifdef USE_TKILL_ON_ANDROID
  65 extern int tkill (pid_t tid, int signal);
  66 #endif
  67 #endif
  68
  69 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
  70 #define THREAD_DEBUG(a)
  71 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
  72 #define THREAD_WAIT_DEBUG(a)
  73 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
  74 #define LIBGC_DEBUG(a)
  75
  76 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
  77 #define SPIN_LOCK(i) do { \
  78                                 if (SPIN_TRYLOCK (i)) \
  79                                         break; \
  80                         } while (1)
  81
  82 #define SPIN_UNLOCK(i) i = 0
  83
  84 #define LOCK_THREAD(thread) lock_thread((thread))
  85 #define UNLOCK_THREAD(thread) unlock_thread((thread))
  86
  87 typedef union {
  88         gint32 ival;
  89         gfloat fval;
  90 } IntFloatUnion;
  91
  92 typedef union {
  93         gint64 ival;
  94         gdouble fval;
  95 } LongDoubleUnion;
  96
  97 typedef struct _StaticDataFreeList StaticDataFreeList;
  98 struct _StaticDataFreeList {
  99         StaticDataFreeList *next;
 100         guint32 offset;
 101         guint32 size;
 102 };
 103
 104 typedef struct {
 105         int idx;
 106         int offset;
 107         StaticDataFreeList *freelist;
 108 } StaticDataInfo;
 109
 110 /* Number of cached culture objects in the MonoThread->cached_culture_info array
 111  * (per-type): we use the first NUM entries for CultureInfo and the last for
 112  * UICultureInfo. So the size of the array is really NUM_CACHED_CULTURES * 2.
 113  */
 114 #define NUM_CACHED_CULTURES 4
 115 #define CULTURES_START_IDX 0
 116 #define UICULTURES_START_IDX NUM_CACHED_CULTURES
 117
 118 /* Controls access to the 'threads' hash table */
 119 static void mono_threads_lock (void);
 120 static void mono_threads_unlock (void);
 121 static MonoCoopMutex threads_mutex;
 122
 123 /* Controls access to the 'joinable_threads' hash table */
 124 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
 125 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
 126 static mono_mutex_t joinable_threads_mutex;
 127
 128 /* Holds current status of static data heap */
 129 static StaticDataInfo thread_static_info;
 130 static StaticDataInfo context_static_info;
 131
 132 /* The hash of existing threads (key is thread ID, value is
 133  * MonoInternalThread*) that need joining before exit
 134  */
 135 static MonoGHashTable *threads=NULL;
 136
 137 /* List of app context GC handles.
 138  * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
 139  */
 140 static GHashTable *contexts = NULL;
 141
 142 /* Cleanup queue for contexts. */
 143 static MonoReferenceQueue *context_queue;
 144
 145 /*
 146  * Threads which are starting up and they are not in the 'threads' hash yet.
 147  * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
 148  * Protected by mono_threads_lock ().
 149  */
 150 static MonoGHashTable *threads_starting_up = NULL;
 151
 152 /* The TLS key that holds the MonoObject assigned to each thread */
 153 static MonoNativeTlsKey current_object_key;
 154
 155 /* Contains tids */
 156 /* Protected by the threads lock */
 157 static GHashTable *joinable_threads;
 158 static int joinable_thread_count;
 159
 160 #ifdef MONO_HAVE_FAST_TLS
 161 /* we need to use both the Tls* functions and __thread because
 162  * the gc needs to see all the threads
 163  */
 164 MONO_FAST_TLS_DECLARE(tls_current_object);
 165 #define SET_CURRENT_OBJECT(x) do { \
 166         MONO_FAST_TLS_SET (tls_current_object, x); \
 167         mono_native_tls_set_value (current_object_key, x); \
 168 } while (FALSE)
 169 #define GET_CURRENT_OBJECT() ((MonoInternalThread*) MONO_FAST_TLS_GET (tls_current_object))
 170 #else
 171 #define SET_CURRENT_OBJECT(x) mono_native_tls_set_value (current_object_key, x)
 172 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_native_tls_get_value (current_object_key)
 173 #endif
 174
 175 /* function called at thread start */
 176 static MonoThreadStartCB mono_thread_start_cb = NULL;
 177
 178 /* function called at thread attach */
 179 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
 180
 181 /* function called at thread cleanup */
 182 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
 183
 184 /* The default stack size for each thread */
 185 static guint32 default_stacksize = 0;
 186 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
 187
 188 static void context_adjust_static_data (MonoAppContext *ctx);
 189 static void mono_free_static_data (gpointer* static_data);
 190 static void mono_init_static_data_info (StaticDataInfo *static_data);
 191 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
 192 static gboolean mono_thread_resume (MonoInternalThread* thread);
 193 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
 194 static void self_abort_internal (MonoError *error);
 195 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
 196 static void self_suspend_internal (void);
 197
 198 static MonoException* mono_thread_execute_interruption (void);
 199 static void ref_stack_destroy (gpointer rs);
 200
 201 /* Spin lock for InterlockedXXX 64 bit functions */
 202 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
 203 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
 204 static mono_mutex_t interlocked_mutex;
 205
 206 /* global count of thread interruptions requested */
 207 static gint32 thread_interruption_requested = 0;
 208
 209 /* Event signaled when a thread changes its background mode */
 210 static HANDLE background_change_event;
 211
 212 static gboolean shutting_down = FALSE;
 213
 214 static gint32 managed_thread_id_counter = 0;
 215
 216 /* Class lazy loading functions */
 217 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, System, AppDomainUnloadedException)
 218
 219 static void
 220 mono_threads_lock (void)
 221 {
 222         mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
 223 }
 224
 225 static void
 226 mono_threads_unlock (void)
 227 {
 228         mono_locks_coop_release (&threads_mutex, ThreadsLock);
 229 }
 230
 231
 232 static guint32
 233 get_next_managed_thread_id (void)
 234 {
 235         return InterlockedIncrement (&managed_thread_id_counter);
 236 }
 237
 238 MonoNativeTlsKey
 239 mono_thread_get_tls_key (void)
 240 {
 241         return current_object_key;
 242 }
 243
 244 gint32
 245 mono_thread_get_tls_offset (void)
 246 {
 247         int offset = -1;
 248
 249 #ifdef HOST_WIN32
 250         if (current_object_key)
 251                 offset = current_object_key;
 252 #else
 253         MONO_THREAD_VAR_OFFSET (tls_current_object,offset);
 254 #endif
 255         return offset;
 256 }
 257
 258 static inline MonoNativeThreadId
 259 thread_get_tid (MonoInternalThread *thread)
 260 {
 261         /* We store the tid as a guint64 to keep the object layout constant between platforms */
 262         return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
 263 }
 264
 265 static void ensure_synch_cs_set (MonoInternalThread *thread)
 266 {
 267         MonoCoopMutex *synch_cs;
 268
 269         if (thread->synch_cs != NULL) {
 270                 return;
 271         }
 272
 273         synch_cs = g_new0 (MonoCoopMutex, 1);
 274         mono_coop_mutex_init_recursive (synch_cs);
 275
 276         if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
 277                                                synch_cs, NULL) != NULL) {
 278                 /* Another thread must have installed this CS */
 279                 mono_coop_mutex_destroy (synch_cs);
 280                 g_free (synch_cs);
 281         }
 282 }
 283
 284 static inline void
 285 lock_thread (MonoInternalThread *thread)
 286 {
 287         if (!thread->synch_cs)
 288                 ensure_synch_cs_set (thread);
 289
 290         g_assert (thread->synch_cs);
 291
 292         mono_coop_mutex_lock (thread->synch_cs);
 293 }
 294
 295 static inline void
 296 unlock_thread (MonoInternalThread *thread)
 297 {
 298         mono_coop_mutex_unlock (thread->synch_cs);
 299 }
 300
 301 static inline gboolean
 302 is_appdomainunloaded_exception (MonoClass *klass)
 303 {
 304         return klass == mono_class_get_appdomain_unloaded_exception_class ();
 305 }
 306
 307 static inline gboolean
 308 is_threadabort_exception (MonoClass *klass)
 309 {
 310         return klass == mono_defaults.threadabortexception_class;
 311 }
 312
 313 /*
 314  * NOTE: this function can be called also for threads different from the current one:
 315  * make sure no code called from it will ever assume it is run on the thread that is
 316  * getting cleaned up.
 317  */
 318 static void thread_cleanup (MonoInternalThread *thread)
 319 {
 320         gboolean ret;
 321
 322         g_assert (thread != NULL);
 323
 324         if (thread->abort_state_handle) {
 325                 mono_gchandle_free (thread->abort_state_handle);
 326                 thread->abort_state_handle = 0;
 327         }
 328         thread->abort_exc = NULL;
 329         thread->current_appcontext = NULL;
 330
 331         /*
 332          * This is necessary because otherwise we might have
 333          * cross-domain references which will not get cleaned up when
 334          * the target domain is unloaded.
 335          */
 336         if (thread->cached_culture_info) {
 337                 int i;
 338                 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i)
 339                         mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
 340         }
 341
 342         /*
 343          * thread->synch_cs can be NULL if this was called after
 344          * ves_icall_System_Threading_InternalThread_Thread_free_internal.
 345          * This can happen only during shutdown.
 346          * The shutting_down flag is not always set, so we can't assert on it.
 347          */
 348         if (thread->synch_cs)
 349                 LOCK_THREAD (thread);
 350
 351         thread->state |= ThreadState_Stopped;
 352         thread->state &= ~ThreadState_Background;
 353
 354         if (thread->synch_cs)
 355                 UNLOCK_THREAD (thread);
 356
 357         /*
 358         An interruption request has leaked to cleanup. Adjust the global counter.
 359
 360         This can happen is the abort source thread finds the abortee (this) thread
 361         in unmanaged code. If this thread never trips back to managed code or check
 362         the local flag it will be left set and positively unbalance the global counter.
 363
 364         Leaving the counter unbalanced will cause a performance degradation since all threads
 365         will now keep checking their local flags all the time.
 366         */
 367         if (InterlockedExchange (&thread->interruption_requested, 0))
 368                 InterlockedDecrement (&thread_interruption_requested);
 369
 370         mono_threads_lock ();
 371
 372         if (!threads) {
 373                 ret = FALSE;
 374         } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
 375                 /* We have to check whether the thread object for the
 376                  * tid is still the same in the table because the
 377                  * thread might have been destroyed and the tid reused
 378                  * in the meantime, in which case the tid would be in
 379                  * the table, but with another thread object.
 380                  */
 381                 ret = FALSE;
 382         } else {
 383                 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
 384                 ret = TRUE;
 385         }
 386
 387         mono_threads_unlock ();
 388
 389         /* Don't close the handle here, wait for the object finalizer
 390          * to do it. Otherwise, the following race condition applies:
 391          *
 392          * 1) Thread exits (and thread_cleanup() closes the handle)
 393          *
 394          * 2) Some other handle is reassigned the same slot
 395          *
 396          * 3) Another thread tries to join the first thread, and
 397          * blocks waiting for the reassigned handle to be signalled
 398          * (which might never happen).  This is possible, because the
 399          * thread calling Join() still has a reference to the first
 400          * thread's object.
 401          */
 402
 403         /* if the thread is not in the hash it has been removed already */
 404         if (!ret) {
 405                 if (thread == mono_thread_internal_current ()) {
 406                         mono_domain_unset ();
 407                         mono_memory_barrier ();
 408                 }
 409                 if (mono_thread_cleanup_fn)
 410                         mono_thread_cleanup_fn (thread_get_tid (thread));
 411                 return;
 412         }
 413         mono_release_type_locks (thread);
 414
 415         /* Can happen when we attach the profiler helper thread in order to heapshot. */
 416         if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
 417                 mono_profiler_thread_end (thread->tid);
 418
 419         mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
 420
 421         if (thread == mono_thread_internal_current ()) {
 422                 /*
 423                  * This will signal async signal handlers that the thread has exited.
 424                  * The profiler callback needs this to be set, so it cannot be done earlier.
 425                  */
 426                 mono_domain_unset ();
 427                 mono_memory_barrier ();
 428         }
 429
 430         if (thread == mono_thread_internal_current ())
 431                 mono_thread_pop_appdomain_ref ();
 432
 433         thread->cached_culture_info = NULL;
 434
 435         mono_free_static_data (thread->static_data);
 436         thread->static_data = NULL;
 437         ref_stack_destroy (thread->appdomain_refs);
 438         thread->appdomain_refs = NULL;
 439
 440         if (mono_thread_cleanup_fn)
 441                 mono_thread_cleanup_fn (thread_get_tid (thread));
 442
 443         if (mono_gc_is_moving ()) {
 444                 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
 445                 thread->thread_pinning_ref = NULL;
 446         }
 447
 448 }
 449
 450 /*
 451  * A special static data offset (guint32) consists of 3 parts:
 452  *
 453  * [0]   6-bit index into the array of chunks.
 454  * [6]   25-bit offset into the array.
 455  * [31]  Bit indicating thread or context static.
 456  */
 457
 458 typedef union {
 459         struct {
 460 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
 461                 guint32 type : 1;
 462                 guint32 offset : 25;
 463                 guint32 index : 6;
 464 #else
 465                 guint32 index : 6;
 466                 guint32 offset : 25;
 467                 guint32 type : 1;
 468 #endif
 469         } fields;
 470         guint32 raw;
 471 } SpecialStaticOffset;
 472
 473 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
 474 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
 475
 476 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
 477         ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
 478 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
 479         (((SpecialStaticOffset *) &(x))->fields.f)
 480
 481 static gpointer
 482 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
 483 {
 484         g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
 485
 486         int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
 487         int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
 488
 489         return ((char *) thread->static_data [idx]) + off;
 490 }
 491
 492 static gpointer
 493 get_context_static_data (MonoAppContext *ctx, guint32 offset)
 494 {
 495         g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
 496
 497         int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
 498         int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
 499
 500         return ((char *) ctx->static_data [idx]) + off;
 501 }
 502
 503 static MonoThread**
 504 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
 505 {
 506         static MonoClassField *current_thread_field = NULL;
 507
 508         guint32 offset;
 509
 510         if (!current_thread_field) {
 511                 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
 512                 g_assert (current_thread_field);
 513         }
 514
 515         mono_class_vtable (domain, mono_defaults.thread_class);
 516         mono_domain_lock (domain);
 517         offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
 518         mono_domain_unlock (domain);
 519         g_assert (offset);
 520
 521         return (MonoThread **)get_thread_static_data (thread, offset);
 522 }
 523
 524 static void
 525 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
 526 {
 527         MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
 528
 529         g_assert (current->obj.vtable->domain == domain);
 530
 531         g_assert (!*current_thread_ptr);
 532         *current_thread_ptr = current;
 533 }
 534
 535 static MonoThread*
 536 create_thread_object (MonoDomain *domain)
 537 {
 538         MonoError error;
 539         MonoVTable *vt = mono_class_vtable (domain, mono_defaults.thread_class);
 540         MonoThread *t = (MonoThread*)mono_object_new_mature (vt, &error);
 541         /* only possible failure mode is OOM, from which we don't expect to recover. */
 542         mono_error_assert_ok (&error);
 543         return t;
 544 }
 545
 546 static MonoThread*
 547 new_thread_with_internal (MonoDomain *domain, MonoInternalThread *internal)
 548 {
 549         MonoThread *thread;
 550
 551         thread = create_thread_object (domain);
 552         thread->priority = MONO_THREAD_PRIORITY_NORMAL;
 553
 554         MONO_OBJECT_SETREF (thread, internal_thread, internal);
 555
 556         return thread;
 557 }
 558
 559 static MonoInternalThread*
 560 create_internal_thread (void)
 561 {
 562         MonoError error;
 563         MonoInternalThread *thread;
 564         MonoVTable *vt;
 565
 566         vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
 567         thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
 568         /* only possible failure mode is OOM, from which we don't exect to recover */
 569         mono_error_assert_ok (&error);
 570
 571         thread->synch_cs = g_new0 (MonoCoopMutex, 1);
 572         mono_coop_mutex_init_recursive (thread->synch_cs);
 573
 574         thread->apartment_state = ThreadApartmentState_Unknown;
 575         thread->managed_id = get_next_managed_thread_id ();
 576         if (mono_gc_is_moving ()) {
 577                 thread->thread_pinning_ref = thread;
 578                 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
 579         }
 580
 581         return thread;
 582 }
 583
 584 static void
 585 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
 586
 587 static gboolean
 588 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain, gsize *stack_ptr)
 589 {
 590         MonoThreadInfo *info;
 591         MonoInternalThread *internal;
 592         MonoDomain *domain, *root_domain;
 593
 594         g_assert (thread);
 595
 596         info = mono_thread_info_current ();
 597
 598         internal = thread->internal_thread;
 599         internal->handle = mono_thread_info_duplicate_handle (info);
 600         internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
 601         internal->thread_info = info;
 602         internal->small_id = info->small_id;
 603         internal->stack_ptr = stack_ptr;
 604
 605         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
 606
 607         SET_CURRENT_OBJECT (internal);
 608
 609         domain = mono_object_domain (thread);
 610
 611         mono_thread_push_appdomain_ref (domain);
 612         if (!mono_domain_set (domain, force_domain)) {
 613                 mono_thread_pop_appdomain_ref ();
 614                 return FALSE;
 615         }
 616
 617         mono_threads_lock ();
 618
 619         if (threads_starting_up)
 620                 mono_g_hash_table_remove (threads_starting_up, thread);
 621
 622         if (shutting_down && !force_attach) {
 623                 mono_threads_unlock ();
 624                 return FALSE;
 625         }
 626
 627         if (!threads) {
 628                 MONO_GC_REGISTER_ROOT_FIXED (threads, MONO_ROOT_SOURCE_THREADING, "threads table");
 629                 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
 630         }
 631
 632         /* We don't need to duplicate thread->handle, because it is
 633          * only closed when the thread object is finalized by the GC. */
 634         mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
 635
 636         /* We have to do this here because mono_thread_start_cb
 637          * requires that root_domain_thread is set up. */
 638         if (thread_static_info.offset || thread_static_info.idx > 0) {
 639                 /* get the current allocated size */
 640                 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
 641                 mono_alloc_static_data (&internal->static_data, offset, TRUE);
 642         }
 643
 644         mono_threads_unlock ();
 645
 646         root_domain = mono_get_root_domain ();
 647
 648         g_assert (!internal->root_domain_thread);
 649         if (domain != root_domain)
 650                 MONO_OBJECT_SETREF (internal, root_domain_thread, new_thread_with_internal (root_domain, internal));
 651         else
 652                 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
 653
 654         if (domain != root_domain)
 655                 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
 656
 657         set_current_thread_for_domain (domain, internal, thread);
 658
 659         THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
 660
 661         return TRUE;
 662 }
 663
 664 typedef struct {
 665         gint32 ref;
 666         MonoThread *thread;
 667         MonoObject *start_delegate;
 668         MonoObject *start_delegate_arg;
 669         MonoThreadStart start_func;
 670         gpointer start_func_arg;
 671         gboolean failed;
 672         MonoCoopSem registered;
 673 } StartInfo;
 674
 675 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
 676 {
 677         MonoError error;
 678         MonoThreadStart start_func;
 679         void *start_func_arg;
 680         gsize tid;
 681         /*
 682          * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
 683          * GC stack walk.
 684          */
 685         MonoThread *thread;
 686         MonoInternalThread *internal;
 687         MonoObject *start_delegate;
 688         MonoObject *start_delegate_arg;
 689         MonoDomain *domain;
 690
 691         thread = start_info->thread;
 692         internal = thread->internal_thread;
 693         domain = mono_object_domain (start_info->thread);
 694
 695         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
 696
 697         if (!mono_thread_attach_internal (thread, FALSE, FALSE, stack_ptr)) {
 698                 start_info->failed = TRUE;
 699
 700                 mono_coop_sem_post (&start_info->registered);
 701
 702                 if (InterlockedDecrement (&start_info->ref) == 0) {
 703                         mono_coop_sem_destroy (&start_info->registered);
 704                         g_free (start_info);
 705                 }
 706
 707                 return 0;
 708         }
 709
 710         tid = internal->tid;
 711
 712         start_delegate = start_info->start_delegate;
 713         start_delegate_arg = start_info->start_delegate_arg;
 714         start_func = start_info->start_func;
 715         start_func_arg = start_info->start_func_arg;
 716
 717         /* This MUST be called before any managed code can be
 718          * executed, as it calls the callback function that (for the
 719          * jit) sets the lmf marker.
 720          */
 721
 722         if (mono_thread_start_cb)
 723                 mono_thread_start_cb (tid, stack_ptr, start_func);
 724
 725         /* On 2.0 profile (and higher), set explicitly since state might have been
 726            Unknown */
 727         if (internal->apartment_state == ThreadApartmentState_Unknown)
 728                 internal->apartment_state = ThreadApartmentState_MTA;
 729
 730         mono_thread_init_apartment_state ();
 731
 732         /* Let the thread that called Start() know we're ready */
 733         mono_coop_sem_post (&start_info->registered);
 734
 735         if (InterlockedDecrement (&start_info->ref) == 0) {
 736                 mono_coop_sem_destroy (&start_info->registered);
 737                 g_free (start_info);
 738         }
 739
 740         /* start_info is not valid anymore */
 741         start_info = NULL;
 742
 743         /*
 744          * Call this after calling start_notify, since the profiler callback might want
 745          * to lock the thread, and the lock is held by thread_start () which waits for
 746          * start_notify.
 747          */
 748         mono_profiler_thread_start (tid);
 749
 750         /* if the name was set before starting, we didn't invoke the profiler callback */
 751         if (internal->name) {
 752                 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
 753                 mono_profiler_thread_name (internal->tid, tname);
 754                 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
 755                 g_free (tname);
 756         }
 757
 758         /* start_func is set only for unmanaged start functions */
 759         if (start_func) {
 760                 start_func (start_func_arg);
 761         } else {
 762                 void *args [1];
 763
 764                 g_assert (start_delegate != NULL);
 765
 766                 /* we may want to handle the exception here. See comment below on unhandled exceptions */
 767                 args [0] = (gpointer) start_delegate_arg;
 768                 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
 769
 770                 if (!mono_error_ok (&error)) {
 771                         MonoException *ex = mono_error_convert_to_exception (&error);
 772
 773                         g_assert (ex != NULL);
 774                         MonoClass *klass = mono_object_get_class (&ex->object);
 775                         if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
 776                             !is_threadabort_exception (klass)) {
 777                                 mono_unhandled_exception (&ex->object);
 778                                 mono_invoke_unhandled_exception_hook (&ex->object);
 779                                 g_assert_not_reached ();
 780                         }
 781                 } else {
 782                         mono_error_cleanup (&error);
 783                 }
 784         }
 785
 786         /* If the thread calls ExitThread at all, this remaining code
 787          * will not be executed, but the main thread will eventually
 788          * call thread_cleanup() on this thread's behalf.
 789          */
 790
 791         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
 792
 793         /* Do any cleanup needed for apartment state. This
 794          * cannot be done in thread_cleanup since thread_cleanup could be
 795          * called for a thread other than the current thread.
 796          * mono_thread_cleanup_apartment_state cleans up apartment
 797          * for the current thead */
 798         mono_thread_cleanup_apartment_state ();
 799
 800         thread_cleanup (internal);
 801
 802         internal->tid = 0;
 803
 804         /* Remove the reference to the thread object in the TLS data,
 805          * so the thread object can be finalized.  This won't be
 806          * reached if the thread threw an uncaught exception, so those
 807          * thread handles will stay referenced :-( (This is due to
 808          * missing support for scanning thread-specific data in the
 809          * Boehm GC - the io-layer keeps a GC-visible hash of pointers
 810          * to TLS data.)
 811          */
 812         SET_CURRENT_OBJECT (NULL);
 813
 814         return(0);
 815 }
 816
 817 static gsize WINAPI start_wrapper(void *data)
 818 {
 819         volatile gsize dummy;
 820
 821         /* Avoid scanning the frames above this frame during a GC */
 822         mono_gc_set_stack_end ((void*)&dummy);
 823
 824         return start_wrapper_internal ((StartInfo*) data, (gsize*) &dummy);
 825 }
 826
 827 /*
 828  * create_thread:
 829  *
 830  *   Common thread creation code.
 831  * LOCKING: Acquires the threads lock.
 832  */
 833 static gboolean
 834 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
 835         gboolean threadpool_thread, guint32 stack_size, MonoError *error)
 836 {
 837         StartInfo *start_info = NULL;
 838         HANDLE thread_handle;
 839         MonoNativeThreadId tid;
 840         MonoThreadParm tp;
 841         gboolean ret;
 842
 843         if (start_delegate)
 844                 g_assert (!start_func && !start_func_arg);
 845         if (start_func)
 846                 g_assert (!start_delegate);
 847
 848         /*
 849          * Join joinable threads to prevent running out of threads since the finalizer
 850          * thread might be blocked/backlogged.
 851          */
 852         mono_threads_join_threads ();
 853
 854         mono_error_init (error);
 855
 856         mono_threads_lock ();
 857         if (shutting_down) {
 858                 mono_threads_unlock ();
 859                 return FALSE;
 860         }
 861         if (threads_starting_up == NULL) {
 862                 MONO_GC_REGISTER_ROOT_FIXED (threads_starting_up, MONO_ROOT_SOURCE_THREADING, "starting threads table");
 863                 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
 864         }
 865         mono_g_hash_table_insert (threads_starting_up, thread, thread);
 866         mono_threads_unlock ();
 867
 868         internal->threadpool_thread = threadpool_thread;
 869         if (threadpool_thread)
 870                 mono_thread_set_state (internal, ThreadState_Background);
 871
 872         start_info = g_new0 (StartInfo, 1);
 873         start_info->ref = 2;
 874         start_info->thread = thread;
 875         start_info->start_delegate = start_delegate;
 876         start_info->start_delegate_arg = thread->start_obj;
 877         start_info->start_func = start_func;
 878         start_info->start_func_arg = start_func_arg;
 879         start_info->failed = FALSE;
 880         mono_coop_sem_init (&start_info->registered, 0);
 881
 882         if (stack_size == 0)
 883                 stack_size = default_stacksize_for_thread (internal);
 884
 885         tp.priority = thread->priority;
 886         tp.stack_size = stack_size;
 887         tp.creation_flags = 0;
 888
 889         thread_handle = mono_threads_create_thread (start_wrapper, start_info, &tp, &tid);
 890
 891         if (thread_handle == NULL) {
 892                 /* The thread couldn't be created, so set an exception */
 893                 mono_threads_lock ();
 894                 mono_g_hash_table_remove (threads_starting_up, thread);
 895                 mono_threads_unlock ();
 896                 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", GetLastError());
 897                 /* ref is not going to be decremented in start_wrapper_internal */
 898                 InterlockedDecrement (&start_info->ref);
 899                 ret = FALSE;
 900                 goto done;
 901         }
 902
 903         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
 904
 905         /*
 906          * Wait for the thread to set up its TLS data etc, so
 907          * theres no potential race condition if someone tries
 908          * to look up the data believing the thread has
 909          * started
 910          */
 911
 912         mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
 913
 914         mono_threads_close_thread_handle (thread_handle);
 915
 916         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
 917
 918         ret = !start_info->failed;
 919
 920 done:
 921         if (InterlockedDecrement (&start_info->ref) == 0) {
 922                 mono_coop_sem_destroy (&start_info->registered);
 923                 g_free (start_info);
 924         }
 925
 926         return ret;
 927 }
 928
 929 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
 930 {
 931         if (mono_thread_start_cb) {
 932                 mono_thread_start_cb (tid, stack_start, func);
 933         }
 934 }
 935
 936 void mono_threads_set_default_stacksize (guint32 stacksize)
 937 {
 938         default_stacksize = stacksize;
 939 }
 940
 941 guint32 mono_threads_get_default_stacksize (void)
 942 {
 943         return default_stacksize;
 944 }
 945
 946 /*
 947  * mono_thread_create_internal:
 948  *
 949  *   ARG should not be a GC reference.
 950  */
 951 MonoInternalThread*
 952 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, gboolean threadpool_thread, guint32 stack_size, MonoError *error)
 953 {
 954         MonoThread *thread;
 955         MonoInternalThread *internal;
 956         gboolean res;
 957
 958         mono_error_init (error);
 959
 960         thread = create_thread_object (domain);
 961         thread->priority = MONO_THREAD_PRIORITY_NORMAL;
 962
 963         internal = create_internal_thread ();
 964
 965         MONO_OBJECT_SETREF (thread, internal_thread, internal);
 966
 967         res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, threadpool_thread, stack_size, error);
 968         return_val_if_nok (error, NULL);
 969
 970         return internal;
 971 }
 972
 973 void
 974 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
 975 {
 976         MonoError error;
 977         if (!mono_thread_create_checked (domain, func, arg, &error))
 978                 mono_error_cleanup (&error);
 979 }
 980
 981 gboolean
 982 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
 983 {
 984         return (NULL != mono_thread_create_internal (domain, func, arg, FALSE, 0, error));
 985 }
 986
 987 MonoThread *
 988 mono_thread_attach (MonoDomain *domain)
 989 {
 990         MonoThread *thread = mono_thread_attach_full (domain, FALSE);
 991
 992         return thread;
 993 }
 994
 995 MonoThread *
 996 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
 997 {
 998         MonoInternalThread *internal;
 999         MonoThread *thread;
1000         MonoNativeThreadId tid;
1001         gsize stack_ptr;
1002
1003         if ((internal = mono_thread_internal_current ())) {
1004                 if (domain != mono_domain_get ())
1005                         mono_domain_set (domain, TRUE);
1006                 /* Already attached */
1007                 return mono_thread_current ();
1008         }
1009
1010         if (!mono_gc_register_thread (&domain)) {
1011                 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.", mono_native_thread_id_get ());
1012         }
1013
1014         tid=mono_native_thread_id_get ();
1015
1016         internal = create_internal_thread ();
1017
1018         thread = new_thread_with_internal (domain, internal);
1019
1020         if (!mono_thread_attach_internal (thread, force_attach, TRUE, &stack_ptr)) {
1021                 /* Mono is shutting down, so just wait for the end */
1022                 for (;;)
1023                         mono_thread_info_sleep (10000, NULL);
1024         }
1025
1026         THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1027
1028         if (mono_thread_attach_cb) {
1029                 guint8 *staddr;
1030                 size_t stsize;
1031
1032                 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1033
1034                 if (staddr == NULL)
1035                         mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1036                 else
1037                         mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1038         }
1039
1040         /* Can happen when we attach the profiler helper thread in order to heapshot. */
1041         if (!mono_thread_info_current ()->tools_thread)
1042                 // FIXME: Need a separate callback
1043                 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1044
1045         return thread;
1046 }
1047
1048 void
1049 mono_thread_detach_internal (MonoInternalThread *thread)
1050 {
1051         g_return_if_fail (thread != NULL);
1052
1053         THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1054
1055         thread_cleanup (thread);
1056
1057         SET_CURRENT_OBJECT (NULL);
1058         mono_domain_unset ();
1059
1060         /* Don't need to close the handle to this thread, even though we took a
1061          * reference in mono_thread_attach (), because the GC will do it
1062          * when the Thread object is finalised.
1063          */
1064 }
1065
1066 void
1067 mono_thread_detach (MonoThread *thread)
1068 {
1069         if (thread)
1070                 mono_thread_detach_internal (thread->internal_thread);
1071 }
1072
1073 /*
1074  * mono_thread_detach_if_exiting:
1075  *
1076  *   Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1077  * This should be used at the end of embedding code which calls into managed code, and which
1078  * can be called from pthread dtors, like dealloc: implementations in objective-c.
1079  */
1080 mono_bool
1081 mono_thread_detach_if_exiting (void)
1082 {
1083         if (mono_thread_info_is_exiting ()) {
1084                 MonoInternalThread *thread;
1085
1086                 thread = mono_thread_internal_current ();
1087                 if (thread) {
1088                         mono_thread_detach_internal (thread);
1089                         mono_thread_info_detach ();
1090                         return TRUE;
1091                 }
1092         }
1093         return FALSE;
1094 }
1095
1096 void
1097 mono_thread_exit (void)
1098 {
1099         MonoInternalThread *thread = mono_thread_internal_current ();
1100
1101         THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1102
1103         thread_cleanup (thread);
1104         SET_CURRENT_OBJECT (NULL);
1105         mono_domain_unset ();
1106
1107         /* we could add a callback here for embedders to use. */
1108         if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1109                 exit (mono_environment_exitcode_get ());
1110         mono_thread_info_exit ();
1111 }
1112
1113 void
1114 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1115 {
1116         MonoInternalThread *internal;
1117
1118         internal = create_internal_thread ();
1119
1120         internal->state = ThreadState_Unstarted;
1121
1122         InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1123 }
1124
1125 HANDLE
1126 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1127                                                                                                    MonoObject *start)
1128 {
1129         MonoError error;
1130         MonoInternalThread *internal;
1131         gboolean res;
1132
1133         THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1134
1135         if (!this_obj->internal_thread)
1136                 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1137         internal = this_obj->internal_thread;
1138
1139         LOCK_THREAD (internal);
1140
1141         if ((internal->state & ThreadState_Unstarted) == 0) {
1142                 UNLOCK_THREAD (internal);
1143                 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1144                 return NULL;
1145         }
1146
1147         if ((internal->state & ThreadState_Aborted) != 0) {
1148                 UNLOCK_THREAD (internal);
1149                 return this_obj;
1150         }
1151
1152         res = create_thread (this_obj, internal, start, NULL, NULL, FALSE, 0, &error);
1153         if (!res) {
1154                 mono_error_cleanup (&error);
1155                 UNLOCK_THREAD (internal);
1156                 return NULL;
1157         }
1158
1159         internal->state &= ~ThreadState_Unstarted;
1160
1161         THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1162
1163         UNLOCK_THREAD (internal);
1164         return internal->handle;
1165 }
1166
1167 /*
1168  * This is called from the finalizer of the internal thread object.
1169  */
1170 void
1171 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj, HANDLE thread)
1172 {
1173         THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, thread));
1174
1175         /*
1176          * Since threads keep a reference to their thread object while running, by the time this function is called,
1177          * the thread has already exited/detached, i.e. thread_cleanup () has ran. The exception is during shutdown,
1178          * when thread_cleanup () can be called after this.
1179          */
1180         if (thread)
1181                 mono_threads_close_thread_handle (thread);
1182
1183         if (this_obj->synch_cs) {
1184                 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1185                 this_obj->synch_cs = NULL;
1186                 mono_coop_mutex_destroy (synch_cs);
1187                 g_free (synch_cs);
1188         }
1189
1190         if (this_obj->name) {
1191                 void *name = this_obj->name;
1192                 this_obj->name = NULL;
1193                 g_free (name);
1194         }
1195 }
1196
1197 void
1198 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1199 {
1200         guint32 res;
1201         MonoInternalThread *thread = mono_thread_internal_current ();
1202
1203         THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1204
1205         if (mono_thread_current_check_pending_interrupt ())
1206                 return;
1207
1208         while (TRUE) {
1209                 gboolean alerted = FALSE;
1210
1211                 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1212
1213                 res = mono_thread_info_sleep (ms, &alerted);
1214
1215                 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1216
1217                 if (alerted) {
1218                         MonoException* exc = mono_thread_execute_interruption ();
1219                         if (exc) {
1220                                 mono_raise_exception (exc);
1221                         } else {
1222                                 // FIXME: !INFINITE
1223                                 if (ms != INFINITE)
1224                                         break;
1225                         }
1226                 } else {
1227                         break;
1228                 }
1229         }
1230 }
1231
1232 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1233 {
1234 }
1235
1236 gint32
1237 ves_icall_System_Threading_Thread_GetDomainID (void)
1238 {
1239         return mono_domain_get()->domain_id;
1240 }
1241
1242 gboolean
1243 ves_icall_System_Threading_Thread_Yield (void)
1244 {
1245         return mono_thread_info_yield ();
1246 }
1247
1248 /*
1249  * mono_thread_get_name:
1250  *
1251  *   Return the name of the thread. NAME_LEN is set to the length of the name.
1252  * Return NULL if the thread has no name. The returned memory is owned by the
1253  * caller.
1254  */
1255 gunichar2*
1256 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1257 {
1258         gunichar2 *res;
1259
1260         LOCK_THREAD (this_obj);
1261
1262         if (!this_obj->name) {
1263                 *name_len = 0;
1264                 res = NULL;
1265         } else {
1266                 *name_len = this_obj->name_len;
1267                 res = g_new (gunichar2, this_obj->name_len);
1268                 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1269         }
1270
1271         UNLOCK_THREAD (this_obj);
1272
1273         return res;
1274 }
1275
1276 /*
1277  * mono_thread_get_name_utf8:
1278  *
1279  * Return the name of the thread in UTF-8.
1280  * Return NULL if the thread has no name.
1281  * The returned memory is owned by the caller.
1282  */
1283 char *
1284 mono_thread_get_name_utf8 (MonoThread *thread)
1285 {
1286         if (thread == NULL)
1287                 return NULL;
1288
1289         MonoInternalThread *internal = thread->internal_thread;
1290         if (internal == NULL)
1291                 return NULL;
1292
1293         LOCK_THREAD (internal);
1294
1295         char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1296
1297         UNLOCK_THREAD (internal);
1298
1299         return tname;
1300 }
1301
1302 /*
1303  * mono_thread_get_managed_id:
1304  *
1305  * Return the Thread.ManagedThreadId value of `thread`.
1306  * Returns -1 if `thread` is NULL.
1307  */
1308 int32_t
1309 mono_thread_get_managed_id (MonoThread *thread)
1310 {
1311         if (thread == NULL)
1312                 return -1;
1313
1314         MonoInternalThread *internal = thread->internal_thread;
1315         if (internal == NULL)
1316                 return -1;
1317
1318         int32_t id = internal->managed_id;
1319
1320         return id;
1321 }
1322
1323 MonoString*
1324 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1325 {
1326         MonoError error;
1327         MonoString* str;
1328
1329         mono_error_init (&error);
1330
1331         LOCK_THREAD (this_obj);
1332
1333         if (!this_obj->name)
1334                 str = NULL;
1335         else
1336                 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1337
1338         UNLOCK_THREAD (this_obj);
1339
1340         if (mono_error_set_pending_exception (&error))
1341                 return NULL;
1342
1343         return str;
1344 }
1345
1346 void
1347 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, MonoError *error)
1348 {
1349         LOCK_THREAD (this_obj);
1350
1351         mono_error_init (error);
1352
1353         if ((this_obj->flags & MONO_THREAD_FLAG_NAME_SET)) {
1354                 UNLOCK_THREAD (this_obj);
1355
1356                 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1357                 return;
1358         }
1359         if (this_obj->name) {
1360                 g_free (this_obj->name);
1361                 this_obj->name_len = 0;
1362         }
1363         if (name) {
1364                 this_obj->name = g_new (gunichar2, mono_string_length (name));
1365                 memcpy (this_obj->name, mono_string_chars (name), mono_string_length (name) * 2);
1366                 this_obj->name_len = mono_string_length (name);
1367
1368                 if (permanent)
1369                         this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1370         }
1371         else
1372                 this_obj->name = NULL;
1373
1374
1375         UNLOCK_THREAD (this_obj);
1376
1377         if (this_obj->name && this_obj->tid) {
1378                 char *tname = mono_string_to_utf8_checked (name, error);
1379                 return_if_nok (error);
1380                 mono_profiler_thread_name (this_obj->tid, tname);
1381                 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1382                 mono_free (tname);
1383         }
1384 }
1385
1386 void
1387 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1388 {
1389         MonoError error;
1390         mono_thread_set_name_internal (this_obj, name, TRUE, &error);
1391         mono_error_set_pending_exception (&error);
1392 }
1393
1394 /*
1395  * ves_icall_System_Threading_Thread_GetPriority_internal:
1396  * @param this_obj: The MonoInternalThread on which to operate.
1397  *
1398  * Gets the priority of the given thread.
1399  * @return: The priority of the given thread.
1400  */
1401 int
1402 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1403 {
1404         gint32 priority;
1405         MonoInternalThread *internal = this_obj->internal_thread;
1406
1407         LOCK_THREAD (internal);
1408         if (internal->handle != NULL)
1409                 priority = mono_thread_info_get_priority ((MonoThreadInfo*) internal->thread_info);
1410         else
1411                 priority = this_obj->priority;
1412         UNLOCK_THREAD (internal);
1413         return priority;
1414 }
1415
1416 /*
1417  * ves_icall_System_Threading_Thread_SetPriority_internal:
1418  * @param this_obj: The MonoInternalThread on which to operate.
1419  * @param priority: The priority to set.
1420  *
1421  * Sets the priority of the given thread.
1422  */
1423 void
1424 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1425 {
1426         MonoInternalThread *internal = this_obj->internal_thread;
1427
1428         LOCK_THREAD (internal);
1429         this_obj->priority = priority;
1430         if (internal->handle != NULL)
1431                 mono_thread_info_set_priority ((MonoThreadInfo*) internal->thread_info, this_obj->priority);
1432         UNLOCK_THREAD (internal);
1433 }
1434
1435 /* If the array is already in the requested domain, we just return it,
1436    otherwise we return a copy in that domain. */
1437 static MonoArray*
1438 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1439 {
1440         MonoArray *copy;
1441
1442         mono_error_init (error);
1443         if (!arr)
1444                 return NULL;
1445
1446         if (mono_object_domain (arr) == domain)
1447                 return arr;
1448
1449         copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1450         memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1451         return copy;
1452 }
1453
1454 MonoArray*
1455 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1456 {
1457         MonoError error;
1458         MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1459         mono_error_set_pending_exception (&error);
1460         return result;
1461 }
1462
1463 MonoArray*
1464 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1465 {
1466         MonoError error;
1467         MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1468         mono_error_set_pending_exception (&error);
1469         return result;
1470 }
1471
1472 MonoThread *
1473 mono_thread_current (void)
1474 {
1475         MonoDomain *domain = mono_domain_get ();
1476         MonoInternalThread *internal = mono_thread_internal_current ();
1477         MonoThread **current_thread_ptr;
1478
1479         g_assert (internal);
1480         current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1481
1482         if (!*current_thread_ptr) {
1483                 g_assert (domain != mono_get_root_domain ());
1484                 *current_thread_ptr = new_thread_with_internal (domain, internal);
1485         }
1486         return *current_thread_ptr;
1487 }
1488
1489 /* Return the thread object belonging to INTERNAL in the current domain */
1490 static MonoThread *
1491 mono_thread_current_for_thread (MonoInternalThread *internal)
1492 {
1493         MonoDomain *domain = mono_domain_get ();
1494         MonoThread **current_thread_ptr;
1495
1496         g_assert (internal);
1497         current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1498
1499         if (!*current_thread_ptr) {
1500                 g_assert (domain != mono_get_root_domain ());
1501                 *current_thread_ptr = new_thread_with_internal (domain, internal);
1502         }
1503         return *current_thread_ptr;
1504 }
1505
1506 MonoInternalThread*
1507 mono_thread_internal_current (void)
1508 {
1509         MonoInternalThread *res = GET_CURRENT_OBJECT ();
1510         THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1511         return res;
1512 }
1513
1514 gboolean
1515 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1516 {
1517         MonoInternalThread *thread = this_obj->internal_thread;
1518         HANDLE handle = thread->handle;
1519         MonoInternalThread *cur_thread = mono_thread_internal_current ();
1520         gboolean ret;
1521
1522         if (mono_thread_current_check_pending_interrupt ())
1523                 return FALSE;
1524
1525         LOCK_THREAD (thread);
1526
1527         if ((thread->state & ThreadState_Unstarted) != 0) {
1528                 UNLOCK_THREAD (thread);
1529
1530                 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1531                 return FALSE;
1532         }
1533
1534         UNLOCK_THREAD (thread);
1535
1536         if(ms== -1) {
1537                 ms=INFINITE;
1538         }
1539         THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1540
1541         mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1542
1543         MONO_ENTER_GC_SAFE;
1544         ret=WaitForSingleObjectEx (handle, ms, TRUE);
1545         MONO_EXIT_GC_SAFE;
1546
1547         mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1548
1549         if(ret==WAIT_OBJECT_0) {
1550                 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1551
1552                 return(TRUE);
1553         }
1554
1555         THREAD_DEBUG (g_message ("%s: join failed", __func__));
1556
1557         return(FALSE);
1558 }
1559
1560 #define MANAGED_WAIT_FAILED 0x7fffffff
1561
1562 static gint32
1563 map_native_wait_result_to_managed (gint32 val)
1564 {
1565         /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1566         return val == WAIT_FAILED ? MANAGED_WAIT_FAILED : val;
1567 }
1568
1569 static gint32
1570 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1571 {
1572         MonoException *exc;
1573         guint32 ret;
1574         gint64 start;
1575         gint32 diff_ms;
1576         gint32 wait = ms;
1577
1578         mono_error_init (error);
1579
1580         start = (ms == -1) ? 0 : mono_100ns_ticks ();
1581         do {
1582                 MONO_ENTER_GC_SAFE;
1583                 if (numhandles != 1)
1584                         ret = WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE);
1585                 else
1586                         ret = WaitForSingleObjectEx (handles [0], ms, TRUE);
1587                 MONO_EXIT_GC_SAFE;
1588
1589                 if (ret != WAIT_IO_COMPLETION)
1590                         break;
1591
1592                 exc = mono_thread_execute_interruption ();
1593                 if (exc) {
1594                         mono_error_set_exception_instance (error, exc);
1595                         break;
1596                 }
1597
1598                 if (ms == -1)
1599                         continue;
1600
1601                 /* Re-calculate ms according to the time passed */
1602                 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1603                 if (diff_ms >= ms) {
1604                         ret = WAIT_TIMEOUT;
1605                         break;
1606                 }
1607                 wait = ms - diff_ms;
1608         } while (TRUE);
1609
1610         return ret;
1611 }
1612
1613 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1614 {
1615         MonoError error;
1616         HANDLE *handles;
1617         guint32 numhandles;
1618         guint32 ret;
1619         guint32 i;
1620         MonoObject *waitHandle;
1621         MonoInternalThread *thread = mono_thread_internal_current ();
1622
1623         /* Do this WaitSleepJoin check before creating objects */
1624         if (mono_thread_current_check_pending_interrupt ())
1625                 return map_native_wait_result_to_managed (WAIT_FAILED);
1626
1627         /* We fail in managed if the array has more than 64 elements */
1628         numhandles = (guint32)mono_array_length(mono_handles);
1629         handles = g_new0(HANDLE, numhandles);
1630
1631         for(i = 0; i < numhandles; i++) {
1632                 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1633                 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1634         }
1635
1636         if(ms== -1) {
1637                 ms=INFINITE;
1638         }
1639
1640         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1641
1642         ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1643
1644         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1645
1646         g_free(handles);
1647
1648         mono_error_set_pending_exception (&error);
1649
1650         /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1651         return map_native_wait_result_to_managed (ret);
1652 }
1653
1654 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1655 {
1656         MonoError error;
1657         HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1658         uintptr_t numhandles;
1659         guint32 ret;
1660         guint32 i;
1661         MonoObject *waitHandle;
1662         MonoInternalThread *thread = mono_thread_internal_current ();
1663
1664         /* Do this WaitSleepJoin check before creating objects */
1665         if (mono_thread_current_check_pending_interrupt ())
1666                 return map_native_wait_result_to_managed (WAIT_FAILED);
1667
1668         numhandles = mono_array_length(mono_handles);
1669         if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1670                 return map_native_wait_result_to_managed (WAIT_FAILED);
1671
1672         for(i = 0; i < numhandles; i++) {
1673                 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1674                 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1675         }
1676
1677         if(ms== -1) {
1678                 ms=INFINITE;
1679         }
1680
1681         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1682
1683         ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1684
1685         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1686
1687         THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1688
1689         mono_error_set_pending_exception (&error);
1690         /*
1691          * These need to be here.  See MSDN dos on WaitForMultipleObjects.
1692          */
1693         if (ret >= WAIT_OBJECT_0 && ret <= WAIT_OBJECT_0 + numhandles - 1) {
1694                 return map_native_wait_result_to_managed (ret - WAIT_OBJECT_0);
1695         }
1696         else if (ret >= WAIT_ABANDONED_0 && ret <= WAIT_ABANDONED_0 + numhandles - 1) {
1697                 return map_native_wait_result_to_managed (ret - WAIT_ABANDONED_0);
1698         }
1699         else {
1700                 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1701                 return map_native_wait_result_to_managed (ret);
1702         }
1703 }
1704
1705 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1706 {
1707         MonoError error;
1708         guint32 ret;
1709         MonoInternalThread *thread = mono_thread_internal_current ();
1710
1711         THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1712
1713         if(ms== -1) {
1714                 ms=INFINITE;
1715         }
1716
1717         if (mono_thread_current_check_pending_interrupt ())
1718                 return map_native_wait_result_to_managed (WAIT_FAILED);
1719
1720         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1721
1722         ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1723
1724         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1725
1726         mono_error_set_pending_exception (&error);
1727         return map_native_wait_result_to_managed (ret);
1728 }
1729
1730 gint32
1731 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
1732 {
1733         guint32 ret;
1734         MonoInternalThread *thread = mono_thread_internal_current ();
1735
1736         if (ms == -1)
1737                 ms = INFINITE;
1738
1739         if (mono_thread_current_check_pending_interrupt ())
1740                 return map_native_wait_result_to_managed (WAIT_FAILED);
1741
1742         mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1743
1744         MONO_ENTER_GC_SAFE;
1745         ret = SignalObjectAndWait (toSignal, toWait, ms, TRUE);
1746         MONO_EXIT_GC_SAFE;
1747
1748         mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1749
1750         return map_native_wait_result_to_managed (ret);
1751 }
1752
1753 HANDLE ves_icall_System_Threading_Mutex_CreateMutex_internal (MonoBoolean owned, MonoString *name, MonoBoolean *created)
1754 {
1755         HANDLE mutex;
1756
1757         *created = TRUE;
1758
1759         if (name == NULL) {
1760                 mutex = CreateMutex (NULL, owned, NULL);
1761         } else {
1762                 mutex = CreateMutex (NULL, owned, mono_string_chars (name));
1763
1764                 if (GetLastError () == ERROR_ALREADY_EXISTS) {
1765                         *created = FALSE;
1766                 }
1767         }
1768
1769         return(mutex);
1770 }
1771
1772 MonoBoolean ves_icall_System_Threading_Mutex_ReleaseMutex_internal (HANDLE handle ) {
1773         return(ReleaseMutex (handle));
1774 }
1775
1776 HANDLE ves_icall_System_Threading_Mutex_OpenMutex_internal (MonoString *name,
1777                                                             gint32 rights,
1778                                                             gint32 *error)
1779 {
1780         HANDLE ret;
1781
1782         *error = ERROR_SUCCESS;
1783
1784         ret = OpenMutex (rights, FALSE, mono_string_chars (name));
1785         if (ret == NULL) {
1786                 *error = GetLastError ();
1787         }
1788
1789         return(ret);
1790 }
1791
1792
1793 HANDLE ves_icall_System_Threading_Semaphore_CreateSemaphore_internal (gint32 initialCount, gint32 maximumCount, MonoString *name, gint32 *error)
1794 {
1795         HANDLE sem;
1796
1797         if (name == NULL) {
1798                 sem = CreateSemaphore (NULL, initialCount, maximumCount, NULL);
1799         } else {
1800                 sem = CreateSemaphore (NULL, initialCount, maximumCount,
1801                                        mono_string_chars (name));
1802         }
1803
1804         *error = GetLastError ();
1805
1806         return(sem);
1807 }
1808
1809 MonoBoolean ves_icall_System_Threading_Semaphore_ReleaseSemaphore_internal (HANDLE handle, gint32 releaseCount, gint32 *prevcount)
1810 {
1811         return ReleaseSemaphore (handle, releaseCount, prevcount);
1812 }
1813
1814 HANDLE ves_icall_System_Threading_Semaphore_OpenSemaphore_internal (MonoString *name, gint32 rights, gint32 *error)
1815 {
1816         HANDLE sem;
1817
1818         sem = OpenSemaphore (rights, FALSE, mono_string_chars (name));
1819
1820         *error = GetLastError ();
1821
1822         return(sem);
1823 }
1824
1825 HANDLE ves_icall_System_Threading_Events_CreateEvent_internal (MonoBoolean manual, MonoBoolean initial, MonoString *name, gint32 *error)
1826 {
1827         HANDLE event;
1828
1829         if (name == NULL) {
1830                 event = CreateEvent (NULL, manual, initial, NULL);
1831         } else {
1832                 event = CreateEvent (NULL, manual, initial,
1833                                      mono_string_chars (name));
1834         }
1835
1836         *error = GetLastError ();
1837
1838         return(event);
1839 }
1840
1841 gboolean ves_icall_System_Threading_Events_SetEvent_internal (HANDLE handle) {
1842         return (SetEvent(handle));
1843 }
1844
1845 gboolean ves_icall_System_Threading_Events_ResetEvent_internal (HANDLE handle) {
1846         return (ResetEvent(handle));
1847 }
1848
1849 void
1850 ves_icall_System_Threading_Events_CloseEvent_internal (HANDLE handle) {
1851         CloseHandle (handle);
1852 }
1853
1854 HANDLE ves_icall_System_Threading_Events_OpenEvent_internal (MonoString *name,
1855                                                              gint32 rights,
1856                                                              gint32 *error)
1857 {
1858         HANDLE ret;
1859
1860         ret = OpenEvent (rights, FALSE, mono_string_chars (name));
1861         if (ret == NULL) {
1862                 *error = GetLastError ();
1863         } else {
1864                 *error = ERROR_SUCCESS;
1865         }
1866
1867         return(ret);
1868 }
1869
1870 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1871 {
1872         return InterlockedIncrement (location);
1873 }
1874
1875 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1876 {
1877 #if SIZEOF_VOID_P == 4
1878         if (G_UNLIKELY ((size_t)location & 0x7)) {
1879                 gint64 ret;
1880                 mono_interlocked_lock ();
1881                 (*location)++;
1882                 ret = *location;
1883                 mono_interlocked_unlock ();
1884                 return ret;
1885         }
1886 #endif
1887         return InterlockedIncrement64 (location);
1888 }
1889
1890 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1891 {
1892         return InterlockedDecrement(location);
1893 }
1894
1895 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1896 {
1897 #if SIZEOF_VOID_P == 4
1898         if (G_UNLIKELY ((size_t)location & 0x7)) {
1899                 gint64 ret;
1900                 mono_interlocked_lock ();
1901                 (*location)--;
1902                 ret = *location;
1903                 mono_interlocked_unlock ();
1904                 return ret;
1905         }
1906 #endif
1907         return InterlockedDecrement64 (location);
1908 }
1909
1910 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1911 {
1912         return InterlockedExchange(location, value);
1913 }
1914
1915 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
1916 {
1917         MonoObject *res;
1918         res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
1919         mono_gc_wbarrier_generic_nostore (location);
1920         return res;
1921 }
1922
1923 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
1924 {
1925         return InterlockedExchangePointer(location, value);
1926 }
1927
1928 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
1929 {
1930         IntFloatUnion val, ret;
1931
1932         val.fval = value;
1933         ret.ival = InterlockedExchange((gint32 *) location, val.ival);
1934
1935         return ret.fval;
1936 }
1937
1938 gint64
1939 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
1940 {
1941 #if SIZEOF_VOID_P == 4
1942         if (G_UNLIKELY ((size_t)location & 0x7)) {
1943                 gint64 ret;
1944                 mono_interlocked_lock ();
1945                 ret = *location;
1946                 *location = value;
1947                 mono_interlocked_unlock ();
1948                 return ret;
1949         }
1950 #endif
1951         return InterlockedExchange64 (location, value);
1952 }
1953
1954 gdouble
1955 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
1956 {
1957         LongDoubleUnion val, ret;
1958
1959         val.fval = value;
1960         ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
1961
1962         return ret.fval;
1963 }
1964
1965 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
1966 {
1967         return InterlockedCompareExchange(location, value, comparand);
1968 }
1969
1970 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
1971 {
1972         gint32 r = InterlockedCompareExchange(location, value, comparand);
1973         *success = r == comparand;
1974         return r;
1975 }
1976
1977 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
1978 {
1979         MonoObject *res;
1980         res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
1981         mono_gc_wbarrier_generic_nostore (location);
1982         return res;
1983 }
1984
1985 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
1986 {
1987         return InterlockedCompareExchangePointer(location, value, comparand);
1988 }
1989
1990 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
1991 {
1992         IntFloatUnion val, ret, cmp;
1993
1994         val.fval = value;
1995         cmp.fval = comparand;
1996         ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
1997
1998         return ret.fval;
1999 }
2000
2001 gdouble
2002 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2003 {
2004 #if SIZEOF_VOID_P == 8
2005         LongDoubleUnion val, comp, ret;
2006
2007         val.fval = value;
2008         comp.fval = comparand;
2009         ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2010
2011         return ret.fval;
2012 #else
2013         gdouble old;
2014
2015         mono_interlocked_lock ();
2016         old = *location;
2017         if (old == comparand)
2018                 *location = value;
2019         mono_interlocked_unlock ();
2020
2021         return old;
2022 #endif
2023 }
2024
2025 gint64
2026 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2027 {
2028 #if SIZEOF_VOID_P == 4
2029         if (G_UNLIKELY ((size_t)location & 0x7)) {
2030                 gint64 old;
2031                 mono_interlocked_lock ();
2032                 old = *location;
2033                 if (old == comparand)
2034                         *location = value;
2035                 mono_interlocked_unlock ();
2036                 return old;
2037         }
2038 #endif
2039         return InterlockedCompareExchange64 (location, value, comparand);
2040 }
2041
2042 MonoObject*
2043 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2044 {
2045         MonoObject *res;
2046         res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2047         mono_gc_wbarrier_generic_nostore (location);
2048         return res;
2049 }
2050
2051 MonoObject*
2052 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2053 {
2054         MonoObject *res;
2055         MONO_CHECK_NULL (location, NULL);
2056         res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2057         mono_gc_wbarrier_generic_nostore (location);
2058         return res;
2059 }
2060
2061 gint32
2062 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2063 {
2064         return InterlockedAdd (location, value);
2065 }
2066
2067 gint64
2068 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2069 {
2070 #if SIZEOF_VOID_P == 4
2071         if (G_UNLIKELY ((size_t)location & 0x7)) {
2072                 gint64 ret;
2073                 mono_interlocked_lock ();
2074                 *location += value;
2075                 ret = *location;
2076                 mono_interlocked_unlock ();
2077                 return ret;
2078         }
2079 #endif
2080         return InterlockedAdd64 (location, value);
2081 }
2082
2083 gint64
2084 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2085 {
2086 #if SIZEOF_VOID_P == 4
2087         if (G_UNLIKELY ((size_t)location & 0x7)) {
2088                 gint64 ret;
2089                 mono_interlocked_lock ();
2090                 ret = *location;
2091                 mono_interlocked_unlock ();
2092                 return ret;
2093         }
2094 #endif
2095         return InterlockedRead64 (location);
2096 }
2097
2098 void
2099 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2100 {
2101         mono_memory_barrier ();
2102 }
2103
2104 void
2105 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2106 {
2107         mono_thread_clr_state (this_obj, (MonoThreadState)state);
2108
2109         if (state & ThreadState_Background) {
2110                 /* If the thread changes the background mode, the main thread has to
2111                  * be notified, since it has to rebuild the list of threads to
2112                  * wait for.
2113                  */
2114                 SetEvent (background_change_event);
2115         }
2116 }
2117
2118 void
2119 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2120 {
2121         mono_thread_set_state (this_obj, (MonoThreadState)state);
2122
2123         if (state & ThreadState_Background) {
2124                 /* If the thread changes the background mode, the main thread has to
2125                  * be notified, since it has to rebuild the list of threads to
2126                  * wait for.
2127                  */
2128                 SetEvent (background_change_event);
2129         }
2130 }
2131
2132 guint32
2133 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2134 {
2135         guint32 state;
2136
2137         LOCK_THREAD (this_obj);
2138
2139         state = this_obj->state;
2140
2141         UNLOCK_THREAD (this_obj);
2142
2143         return state;
2144 }
2145
2146 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2147 {
2148         MonoInternalThread *current;
2149         gboolean throw_;
2150         MonoInternalThread *thread = this_obj->internal_thread;
2151
2152         LOCK_THREAD (thread);
2153
2154         current = mono_thread_internal_current ();
2155
2156         thread->thread_interrupt_requested = TRUE;
2157         throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2158
2159         UNLOCK_THREAD (thread);
2160
2161         if (throw_) {
2162                 async_abort_internal (thread, FALSE);
2163         }
2164 }
2165
2166 /**
2167  * mono_thread_current_check_pending_interrupt:
2168  *
2169  * Checks if there's a interruption request and set the pending exception if so.
2170  *
2171  * @returns true if a pending exception was set
2172  */
2173 gboolean
2174 mono_thread_current_check_pending_interrupt (void)
2175 {
2176         MonoInternalThread *thread = mono_thread_internal_current ();
2177         gboolean throw_ = FALSE;
2178
2179         LOCK_THREAD (thread);
2180
2181         if (thread->thread_interrupt_requested) {
2182                 throw_ = TRUE;
2183                 thread->thread_interrupt_requested = FALSE;
2184         }
2185
2186         UNLOCK_THREAD (thread);
2187
2188         if (throw_)
2189                 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2190         return throw_;
2191 }
2192
2193 static gboolean
2194 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2195 {
2196         LOCK_THREAD (thread);
2197
2198         if ((thread->state & ThreadState_AbortRequested) != 0 ||
2199                 (thread->state & ThreadState_StopRequested) != 0 ||
2200                 (thread->state & ThreadState_Stopped) != 0)
2201         {
2202                 UNLOCK_THREAD (thread);
2203                 return FALSE;
2204         }
2205
2206         if ((thread->state & ThreadState_Unstarted) != 0) {
2207                 thread->state |= ThreadState_Aborted;
2208                 UNLOCK_THREAD (thread);
2209                 return FALSE;
2210         }
2211
2212         thread->state |= ThreadState_AbortRequested;
2213         if (thread->abort_state_handle)
2214                 mono_gchandle_free (thread->abort_state_handle);
2215         if (state) {
2216                 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2217                 g_assert (thread->abort_state_handle);
2218         } else {
2219                 thread->abort_state_handle = 0;
2220         }
2221         thread->abort_exc = NULL;
2222
2223         THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Abort requested for %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), thread, (gsize)thread->tid));
2224
2225         /* During shutdown, we can't wait for other threads */
2226         if (!shutting_down)
2227                 /* Make sure the thread is awake */
2228                 mono_thread_resume (thread);
2229
2230         UNLOCK_THREAD (thread);
2231         return TRUE;
2232 }
2233
2234 void
2235 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2236 {
2237         if (!request_thread_abort (thread, state))
2238                 return;
2239
2240         if (thread == mono_thread_internal_current ()) {
2241                 MonoError error;
2242                 self_abort_internal (&error);
2243                 mono_error_set_pending_exception (&error);
2244         } else {
2245                 async_abort_internal (thread, TRUE);
2246         }
2247 }
2248
2249 /**
2250  * mono_thread_internal_abort:
2251  *
2252  * Request thread @thread to be aborted.
2253  *
2254  * @thread MUST NOT be the current thread.
2255  */
2256 void
2257 mono_thread_internal_abort (MonoInternalThread *thread)
2258 {
2259         g_assert (thread != mono_thread_internal_current ());
2260
2261         if (!request_thread_abort (thread, NULL))
2262                 return;
2263         async_abort_internal (thread, TRUE);
2264 }
2265
2266 void
2267 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2268 {
2269         MonoInternalThread *thread = mono_thread_internal_current ();
2270         gboolean was_aborting;
2271
2272         LOCK_THREAD (thread);
2273         was_aborting = thread->state & ThreadState_AbortRequested;
2274         thread->state &= ~ThreadState_AbortRequested;
2275         UNLOCK_THREAD (thread);
2276
2277         if (!was_aborting) {
2278                 const char *msg = "Unable to reset abort because no abort was requested";
2279                 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2280                 return;
2281         }
2282         thread->abort_exc = NULL;
2283         if (thread->abort_state_handle) {
2284                 mono_gchandle_free (thread->abort_state_handle);
2285                 /* This is actually not necessary - the handle
2286                    only counts if the exception is set */
2287                 thread->abort_state_handle = 0;
2288         }
2289 }
2290
2291 void
2292 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2293 {
2294         LOCK_THREAD (thread);
2295
2296         thread->state &= ~ThreadState_AbortRequested;
2297
2298         if (thread->abort_exc) {
2299                 thread->abort_exc = NULL;
2300                 if (thread->abort_state_handle) {
2301                         mono_gchandle_free (thread->abort_state_handle);
2302                         /* This is actually not necessary - the handle
2303                            only counts if the exception is set */
2304                         thread->abort_state_handle = 0;
2305                 }
2306         }
2307
2308         UNLOCK_THREAD (thread);
2309 }
2310
2311 MonoObject*
2312 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2313 {
2314         MonoError error;
2315         MonoInternalThread *thread = this_obj->internal_thread;
2316         MonoObject *state, *deserialized = NULL;
2317         MonoDomain *domain;
2318
2319         if (!thread->abort_state_handle)
2320                 return NULL;
2321
2322         state = mono_gchandle_get_target (thread->abort_state_handle);
2323         g_assert (state);
2324
2325         domain = mono_domain_get ();
2326         if (mono_object_domain (state) == domain)
2327                 return state;
2328
2329         deserialized = mono_object_xdomain_representation (state, domain, &error);
2330
2331         if (!deserialized) {
2332                 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2333                 if (!is_ok (&error)) {
2334                         MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2335                         MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2336                 }
2337                 mono_set_pending_exception (invalid_op_exc);
2338                 return NULL;
2339         }
2340
2341         return deserialized;
2342 }
2343
2344 static gboolean
2345 mono_thread_suspend (MonoInternalThread *thread)
2346 {
2347         LOCK_THREAD (thread);
2348
2349         if ((thread->state & ThreadState_Unstarted) != 0 ||
2350                 (thread->state & ThreadState_Aborted) != 0 ||
2351                 (thread->state & ThreadState_Stopped) != 0)
2352         {
2353                 UNLOCK_THREAD (thread);
2354                 return FALSE;
2355         }
2356
2357         if ((thread->state & ThreadState_Suspended) != 0 ||
2358                 (thread->state & ThreadState_SuspendRequested) != 0 ||
2359                 (thread->state & ThreadState_StopRequested) != 0)
2360         {
2361                 UNLOCK_THREAD (thread);
2362                 return TRUE;
2363         }
2364
2365         thread->state |= ThreadState_SuspendRequested;
2366
2367         if (thread == mono_thread_internal_current ()) {
2368                 /* calls UNLOCK_THREAD (thread) */
2369                 self_suspend_internal ();
2370         } else {
2371                 /* calls UNLOCK_THREAD (thread) */
2372                 async_suspend_internal (thread, FALSE);
2373         }
2374
2375         return TRUE;
2376 }
2377
2378 void
2379 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2380 {
2381         if (!mono_thread_suspend (this_obj->internal_thread)) {
2382                 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2383                 return;
2384         }
2385 }
2386
2387 /* LOCKING: LOCK_THREAD(thread) must be held */
2388 static gboolean
2389 mono_thread_resume (MonoInternalThread *thread)
2390 {
2391         if ((thread->state & ThreadState_SuspendRequested) != 0) {
2392                 thread->state &= ~ThreadState_SuspendRequested;
2393                 return TRUE;
2394         }
2395
2396         if ((thread->state & ThreadState_Suspended) == 0 ||
2397                 (thread->state & ThreadState_Unstarted) != 0 ||
2398                 (thread->state & ThreadState_Aborted) != 0 ||
2399                 (thread->state & ThreadState_Stopped) != 0)
2400         {
2401                 return FALSE;
2402         }
2403
2404         UNLOCK_THREAD (thread);
2405
2406         /* Awake the thread */
2407         if (!mono_thread_info_resume (thread_get_tid (thread)))
2408                 return FALSE;
2409
2410         LOCK_THREAD (thread);
2411
2412         thread->state &= ~ThreadState_Suspended;
2413
2414         return TRUE;
2415 }
2416
2417 void
2418 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2419 {
2420         if (!thread->internal_thread) {
2421                 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2422         } else {
2423                 LOCK_THREAD (thread->internal_thread);
2424                 if (!mono_thread_resume (thread->internal_thread))
2425                         mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2426                 UNLOCK_THREAD (thread->internal_thread);
2427         }
2428 }
2429
2430 static gboolean
2431 mono_threads_is_critical_method (MonoMethod *method)
2432 {
2433         switch (method->wrapper_type) {
2434         case MONO_WRAPPER_RUNTIME_INVOKE:
2435         case MONO_WRAPPER_XDOMAIN_INVOKE:
2436         case MONO_WRAPPER_XDOMAIN_DISPATCH:
2437                 return TRUE;
2438         }
2439         return FALSE;
2440 }
2441
2442 static gboolean
2443 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2444 {
2445         if (managed)
2446                 return TRUE;
2447
2448         if (mono_threads_is_critical_method (m)) {
2449                 *((gboolean*)data) = TRUE;
2450                 return TRUE;
2451         }
2452         return FALSE;
2453 }
2454
2455 static gboolean
2456 is_running_protected_wrapper (void)
2457 {
2458         gboolean found = FALSE;
2459         mono_stack_walk (find_wrapper, &found);
2460         return found;
2461 }
2462
2463 static gboolean
2464 request_thread_stop (MonoInternalThread *thread)
2465 {
2466         LOCK_THREAD (thread);
2467
2468         if ((thread->state & ThreadState_StopRequested) != 0 ||
2469                 (thread->state & ThreadState_Stopped) != 0)
2470         {
2471                 UNLOCK_THREAD (thread);
2472                 return FALSE;
2473         }
2474
2475         /* Make sure the thread is awake */
2476         mono_thread_resume (thread);
2477
2478         thread->state |= ThreadState_StopRequested;
2479         thread->state &= ~ThreadState_AbortRequested;
2480
2481         UNLOCK_THREAD (thread);
2482         return TRUE;
2483 }
2484
2485 /**
2486  * mono_thread_internal_stop:
2487  *
2488  * Request thread @thread to stop.
2489  *
2490  * @thread MUST NOT be the current thread.
2491  */
2492 void
2493 mono_thread_internal_stop (MonoInternalThread *thread)
2494 {
2495         g_assert (thread != mono_thread_internal_current ());
2496
2497         if (!request_thread_stop (thread))
2498                 return;
2499
2500         async_abort_internal (thread, TRUE);
2501 }
2502
2503 void mono_thread_stop (MonoThread *thread)
2504 {
2505         MonoInternalThread *internal = thread->internal_thread;
2506
2507         if (!request_thread_stop (internal))
2508                 return;
2509
2510         if (internal == mono_thread_internal_current ()) {
2511                 MonoError error;
2512                 self_abort_internal (&error);
2513                 /*
2514                 This function is part of the embeding API and has no way to return the exception
2515                 to be thrown. So what we do is keep the old behavior and raise the exception.
2516                 */
2517                 mono_error_raise_exception (&error); /* OK to throw, see note */
2518         } else {
2519                 async_abort_internal (internal, TRUE);
2520         }
2521 }
2522
2523 gint8
2524 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2525 {
2526         gint8 tmp = *(volatile gint8 *)ptr;
2527         mono_memory_barrier ();
2528         return tmp;
2529 }
2530
2531 gint16
2532 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2533 {
2534         gint16 tmp = *(volatile gint16 *)ptr;
2535         mono_memory_barrier ();
2536         return tmp;
2537 }
2538
2539 gint32
2540 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2541 {
2542         gint32 tmp = *(volatile gint32 *)ptr;
2543         mono_memory_barrier ();
2544         return tmp;
2545 }
2546
2547 gint64
2548 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2549 {
2550         gint64 tmp = *(volatile gint64 *)ptr;
2551         mono_memory_barrier ();
2552         return tmp;
2553 }
2554
2555 void *
2556 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2557 {
2558         volatile void *tmp = *(volatile void **)ptr;
2559         mono_memory_barrier ();
2560         return (void *) tmp;
2561 }
2562
2563 void *
2564 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2565 {
2566         volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2567         mono_memory_barrier ();
2568         return (MonoObject *) tmp;
2569 }
2570
2571 double
2572 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2573 {
2574         double tmp = *(volatile double *)ptr;
2575         mono_memory_barrier ();
2576         return tmp;
2577 }
2578
2579 float
2580 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2581 {
2582         float tmp = *(volatile float *)ptr;
2583         mono_memory_barrier ();
2584         return tmp;
2585 }
2586
2587 gint8
2588 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2589 {
2590         return InterlockedRead8 ((volatile gint8 *)ptr);
2591 }
2592
2593 gint16
2594 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2595 {
2596         return InterlockedRead16 ((volatile gint16 *)ptr);
2597 }
2598
2599 gint32
2600 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2601 {
2602         return InterlockedRead ((volatile gint32 *)ptr);
2603 }
2604
2605 gint64
2606 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2607 {
2608 #if SIZEOF_VOID_P == 4
2609         if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2610                 gint64 val;
2611                 mono_interlocked_lock ();
2612                 val = *(gint64*)ptr;
2613                 mono_interlocked_unlock ();
2614                 return val;
2615         }
2616 #endif
2617         return InterlockedRead64 ((volatile gint64 *)ptr);
2618 }
2619
2620 void *
2621 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2622 {
2623         return InterlockedReadPointer ((volatile gpointer *)ptr);
2624 }
2625
2626 double
2627 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2628 {
2629         LongDoubleUnion u;
2630
2631 #if SIZEOF_VOID_P == 4
2632         if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2633                 double val;
2634                 mono_interlocked_lock ();
2635                 val = *(double*)ptr;
2636                 mono_interlocked_unlock ();
2637                 return val;
2638         }
2639 #endif
2640
2641         u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2642
2643         return u.fval;
2644 }
2645
2646 float
2647 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2648 {
2649         IntFloatUnion u;
2650
2651         u.ival = InterlockedRead ((volatile gint32 *)ptr);
2652
2653         return u.fval;
2654 }
2655
2656 MonoObject*
2657 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2658 {
2659         return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2660 }
2661
2662 void
2663 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2664 {
2665         mono_memory_barrier ();
2666         *(volatile gint8 *)ptr = value;
2667 }
2668
2669 void
2670 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2671 {
2672         mono_memory_barrier ();
2673         *(volatile gint16 *)ptr = value;
2674 }
2675
2676 void
2677 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2678 {
2679         mono_memory_barrier ();
2680         *(volatile gint32 *)ptr = value;
2681 }
2682
2683 void
2684 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2685 {
2686         mono_memory_barrier ();
2687         *(volatile gint64 *)ptr = value;
2688 }
2689
2690 void
2691 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2692 {
2693         mono_memory_barrier ();
2694         *(volatile void **)ptr = value;
2695 }
2696
2697 void
2698 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2699 {
2700         mono_memory_barrier ();
2701         mono_gc_wbarrier_generic_store (ptr, value);
2702 }
2703
2704 void
2705 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2706 {
2707         mono_memory_barrier ();
2708         *(volatile double *)ptr = value;
2709 }
2710
2711 void
2712 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2713 {
2714         mono_memory_barrier ();
2715         *(volatile float *)ptr = value;
2716 }
2717
2718 void
2719 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2720 {
2721         InterlockedWrite8 ((volatile gint8 *)ptr, value);
2722 }
2723
2724 void
2725 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2726 {
2727         InterlockedWrite16 ((volatile gint16 *)ptr, value);
2728 }
2729
2730 void
2731 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2732 {
2733         InterlockedWrite ((volatile gint32 *)ptr, value);
2734 }
2735
2736 void
2737 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2738 {
2739 #if SIZEOF_VOID_P == 4
2740         if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2741                 mono_interlocked_lock ();
2742                 *(gint64*)ptr = value;
2743                 mono_interlocked_unlock ();
2744                 return;
2745         }
2746 #endif
2747
2748         InterlockedWrite64 ((volatile gint64 *)ptr, value);
2749 }
2750
2751 void
2752 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2753 {
2754         InterlockedWritePointer ((volatile gpointer *)ptr, value);
2755 }
2756
2757 void
2758 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2759 {
2760         LongDoubleUnion u;
2761
2762 #if SIZEOF_VOID_P == 4
2763         if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2764                 mono_interlocked_lock ();
2765                 *(double*)ptr = value;
2766                 mono_interlocked_unlock ();
2767                 return;
2768         }
2769 #endif
2770
2771         u.fval = value;
2772
2773         InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2774 }
2775
2776 void
2777 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2778 {
2779         IntFloatUnion u;
2780
2781         u.fval = value;
2782
2783         InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2784 }
2785
2786 void
2787 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2788 {
2789         mono_gc_wbarrier_generic_store_atomic (ptr, value);
2790 }
2791
2792 static void
2793 free_context (void *user_data)
2794 {
2795         ContextStaticData *data = user_data;
2796
2797         mono_threads_lock ();
2798
2799         /*
2800          * There is no guarantee that, by the point this reference queue callback
2801          * has been invoked, the GC handle associated with the object will fail to
2802          * resolve as one might expect. So if we don't free and remove the GC
2803          * handle here, free_context_static_data_helper () could end up resolving
2804          * a GC handle to an actually-dead context which would contain a pointer
2805          * to an already-freed static data segment, resulting in a crash when
2806          * accessing it.
2807          */
2808         g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2809
2810         mono_threads_unlock ();
2811
2812         mono_gchandle_free (data->gc_handle);
2813         mono_free_static_data (data->static_data);
2814         g_free (data);
2815 }
2816
2817 void
2818 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2819 {
2820         mono_threads_lock ();
2821
2822         //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2823
2824         if (!contexts)
2825                 contexts = g_hash_table_new (NULL, NULL);
2826
2827         if (!context_queue)
2828                 context_queue = mono_gc_reference_queue_new (free_context);
2829
2830         gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2831         g_hash_table_insert (contexts, gch, gch);
2832
2833         /*
2834          * We use this intermediate structure to contain a duplicate pointer to
2835          * the static data because we can't rely on being able to resolve the GC
2836          * handle in the reference queue callback.
2837          */
2838         ContextStaticData *data = g_new0 (ContextStaticData, 1);
2839         data->gc_handle = GPOINTER_TO_UINT (gch);
2840         ctx->data = data;
2841
2842         context_adjust_static_data (ctx);
2843         mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2844
2845         mono_threads_unlock ();
2846
2847         mono_profiler_context_loaded (ctx);
2848 }
2849
2850 void
2851 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2852 {
2853         /*
2854          * NOTE: Since finalizers are unreliable for the purposes of ensuring
2855          * cleanup in exceptional circumstances, we don't actually do any
2856          * cleanup work here. We instead do this via a reference queue.
2857          */
2858
2859         //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2860
2861         mono_profiler_context_unloaded (ctx);
2862 }
2863
2864 void
2865 mono_thread_init_tls (void)
2866 {
2867         MONO_FAST_TLS_INIT (tls_current_object);
2868         mono_native_tls_alloc (&current_object_key, NULL);
2869 }
2870
2871 void mono_thread_init (MonoThreadStartCB start_cb,
2872                        MonoThreadAttachCB attach_cb)
2873 {
2874         mono_coop_mutex_init_recursive (&threads_mutex);
2875
2876         mono_os_mutex_init_recursive(&interlocked_mutex);
2877         mono_os_mutex_init_recursive(&joinable_threads_mutex);
2878
2879         background_change_event = CreateEvent (NULL, TRUE, FALSE, NULL);
2880         g_assert(background_change_event != NULL);
2881
2882         mono_init_static_data_info (&thread_static_info);
2883         mono_init_static_data_info (&context_static_info);
2884
2885         THREAD_DEBUG (g_message ("%s: Allocated current_object_key %d", __func__, current_object_key));
2886
2887         mono_thread_start_cb = start_cb;
2888         mono_thread_attach_cb = attach_cb;
2889
2890         /* Get a pseudo handle to the current process.  This is just a
2891          * kludge so that wapi can build a process handle if needed.
2892          * As a pseudo handle is returned, we don't need to clean
2893          * anything up.
2894          */
2895         GetCurrentProcess ();
2896
2897         /* Check that the managed and unmanaged layout of MonoInternalThread matches */
2898         g_assert (MONO_STRUCT_OFFSET (MonoInternalThread, last) == mono_field_get_offset (mono_class_get_field_from_name (mono_defaults.internal_thread_class, "last")));
2899 }
2900
2901 void mono_thread_cleanup (void)
2902 {
2903 #if !defined(RUN_IN_SUBTHREAD)
2904         /* The main thread must abandon any held mutexes (particularly
2905          * important for named mutexes as they are shared across
2906          * processes, see bug 74680.)  This will happen when the
2907          * thread exits, but if it's not running in a subthread it
2908          * won't exit in time.
2909          */
2910         mono_thread_info_set_exited (mono_thread_info_current ());
2911 #endif
2912
2913 #if 0
2914         /* This stuff needs more testing, it seems one of these
2915          * critical sections can be locked when mono_thread_cleanup is
2916          * called.
2917          */
2918         mono_coop_mutex_destroy (&threads_mutex);
2919         mono_os_mutex_destroy (&interlocked_mutex);
2920         mono_os_mutex_destroy (&delayed_free_table_mutex);
2921         mono_os_mutex_destroy (&small_id_mutex);
2922         CloseHandle (background_change_event);
2923 #endif
2924
2925         mono_native_tls_free (current_object_key);
2926 }
2927
2928 void
2929 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2930 {
2931         mono_thread_cleanup_fn = func;
2932 }
2933
2934 void
2935 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2936 {
2937         thread->internal_thread->manage_callback = func;
2938 }
2939
2940 G_GNUC_UNUSED
2941 static void print_tids (gpointer key, gpointer value, gpointer user)
2942 {
2943         /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2944          * sizeof(uint) and a cast to uint would overflow
2945          */
2946         /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2947          * print this as a pointer.
2948          */
2949         g_message ("Waiting for: %p", key);
2950 }
2951
2952 struct wait_data
2953 {
2954         HANDLE handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2955         MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
2956         guint32 num;
2957 };
2958
2959 static void
2960 wait_for_tids (struct wait_data *wait, guint32 timeout)
2961 {
2962         guint32 i, ret;
2963
2964         THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
2965
2966         MONO_ENTER_GC_SAFE;
2967         ret=WaitForMultipleObjectsEx(wait->num, wait->handles, TRUE, timeout, TRUE);
2968         MONO_EXIT_GC_SAFE;
2969
2970         if(ret==WAIT_FAILED) {
2971                 /* See the comment in build_wait_tids() */
2972                 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
2973                 return;
2974         }
2975
2976         for(i=0; i<wait->num; i++)
2977                 mono_threads_close_thread_handle (wait->handles [i]);
2978
2979         if (ret == WAIT_TIMEOUT)
2980                 return;
2981
2982         for(i=0; i<wait->num; i++) {
2983                 gsize tid = wait->threads[i]->tid;
2984
2985                 /*
2986                  * On !win32, when the thread handle becomes signalled, it just means the thread has exited user code,
2987                  * it can still run io-layer etc. code. So wait for it to really exit.
2988                  * FIXME: This won't join threads which are not in the joinable_hash yet.
2989                  */
2990                 mono_thread_join ((gpointer)tid);
2991
2992                 mono_threads_lock ();
2993                 if(mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
2994                         /* This thread must have been killed, because
2995                          * it hasn't cleaned itself up. (It's just
2996                          * possible that the thread exited before the
2997                          * parent thread had a chance to store the
2998                          * handle, and now there is another pointer to
2999                          * the already-exited thread stored.  In this
3000                          * case, we'll just get two
3001                          * mono_profiler_thread_end() calls for the
3002                          * same thread.)
3003                          */
3004
3005                         mono_threads_unlock ();
3006                         THREAD_DEBUG (g_message ("%s: cleaning up after thread %p (%"G_GSIZE_FORMAT")", __func__, wait->threads[i], tid));
3007                         thread_cleanup (wait->threads[i]);
3008                 } else {
3009                         mono_threads_unlock ();
3010                 }
3011         }
3012 }
3013
3014 static void wait_for_tids_or_state_change (struct wait_data *wait, guint32 timeout)
3015 {
3016         guint32 i, ret, count;
3017
3018         THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3019
3020         /* Add the thread state change event, so it wakes up if a thread changes
3021          * to background mode.
3022          */
3023         count = wait->num;
3024         if (count < MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3025                 wait->handles [count] = background_change_event;
3026                 count++;
3027         }
3028
3029         MONO_ENTER_GC_SAFE;
3030         ret=WaitForMultipleObjectsEx (count, wait->handles, FALSE, timeout, TRUE);
3031         MONO_EXIT_GC_SAFE;
3032
3033         if(ret==WAIT_FAILED) {
3034                 /* See the comment in build_wait_tids() */
3035                 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3036                 return;
3037         }
3038
3039         for(i=0; i<wait->num; i++)
3040                 mono_threads_close_thread_handle (wait->handles [i]);
3041
3042         if (ret == WAIT_TIMEOUT)
3043                 return;
3044
3045         if (ret < wait->num) {
3046                 gsize tid = wait->threads[ret]->tid;
3047                 mono_threads_lock ();
3048                 if (mono_g_hash_table_lookup (threads, (gpointer)tid)!=NULL) {
3049                         /* See comment in wait_for_tids about thread cleanup */
3050                         mono_threads_unlock ();
3051                         THREAD_DEBUG (g_message ("%s: cleaning up after thread %"G_GSIZE_FORMAT, __func__, tid));
3052                         thread_cleanup (wait->threads [ret]);
3053                 } else
3054                         mono_threads_unlock ();
3055         }
3056 }
3057
3058 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3059 {
3060         struct wait_data *wait=(struct wait_data *)user;
3061
3062         if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3063                 HANDLE handle;
3064                 MonoInternalThread *thread=(MonoInternalThread *)value;
3065
3066                 /* Ignore background threads, we abort them later */
3067                 /* Do not lock here since it is not needed and the caller holds threads_lock */
3068                 if (thread->state & ThreadState_Background) {
3069                         THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3070                         return; /* just leave, ignore */
3071                 }
3072
3073                 if (mono_gc_is_finalizer_internal_thread (thread)) {
3074                         THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3075                         return;
3076                 }
3077
3078                 if (thread == mono_thread_internal_current ()) {
3079                         THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3080                         return;
3081                 }
3082
3083                 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3084                         THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3085                         return;
3086                 }
3087
3088                 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3089                         THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3090                         return;
3091                 }
3092
3093                 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3094                 if (handle == NULL) {
3095                         THREAD_DEBUG (g_message ("%s: ignoring unopenable thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3096                         return;
3097                 }
3098
3099                 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3100                 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3101                         wait->handles[wait->num]=handle;
3102                         wait->threads[wait->num]=thread;
3103                         wait->num++;
3104
3105                         THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3106                 } else {
3107                         THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3108                 }
3109
3110
3111         } else {
3112                 /* Just ignore the rest, we can't do anything with
3113                  * them yet
3114                  */
3115         }
3116 }
3117
3118 static gboolean
3119 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3120 {
3121         struct wait_data *wait=(struct wait_data *)user;
3122         MonoNativeThreadId self = mono_native_thread_id_get ();
3123         MonoInternalThread *thread = (MonoInternalThread *)value;
3124         HANDLE handle;
3125
3126         if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3127                 return FALSE;
3128
3129         /* The finalizer thread is not a background thread */
3130         if (!mono_native_thread_id_equals (thread_get_tid (thread), self)
3131              && (thread->state & ThreadState_Background) != 0
3132              && (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) == 0
3133         ) {
3134                 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3135                 if (handle == NULL)
3136                         return FALSE;
3137
3138                 wait->handles[wait->num] = handle;
3139                 wait->threads[wait->num] = thread;
3140                 wait->num++;
3141
3142                 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3143                 mono_thread_internal_abort (thread);
3144                 return TRUE;
3145         }
3146
3147         return !mono_native_thread_id_equals (thread_get_tid (thread), self)
3148                 && !mono_gc_is_finalizer_internal_thread (thread);
3149 }
3150
3151 /**
3152  * mono_threads_set_shutting_down:
3153  *
3154  * Is called by a thread that wants to shut down Mono. If the runtime is already
3155  * shutting down, the calling thread is suspended/stopped, and this function never
3156  * returns.
3157  */
3158 void
3159 mono_threads_set_shutting_down (void)
3160 {
3161         MonoInternalThread *current_thread = mono_thread_internal_current ();
3162
3163         mono_threads_lock ();
3164
3165         if (shutting_down) {
3166                 mono_threads_unlock ();
3167
3168                 /* Make sure we're properly suspended/stopped */
3169
3170                 LOCK_THREAD (current_thread);
3171
3172                 if ((current_thread->state & ThreadState_SuspendRequested) ||
3173                     (current_thread->state & ThreadState_AbortRequested) ||
3174                     (current_thread->state & ThreadState_StopRequested)) {
3175                         UNLOCK_THREAD (current_thread);
3176                         mono_thread_execute_interruption ();
3177                 } else {
3178                         current_thread->state |= ThreadState_Stopped;
3179                         UNLOCK_THREAD (current_thread);
3180                 }
3181
3182                 /*since we're killing the thread, unset the current domain.*/
3183                 mono_domain_unset ();
3184
3185                 /* Wake up other threads potentially waiting for us */
3186                 mono_thread_info_exit ();
3187         } else {
3188                 shutting_down = TRUE;
3189
3190                 /* Not really a background state change, but this will
3191                  * interrupt the main thread if it is waiting for all
3192                  * the other threads.
3193                  */
3194                 SetEvent (background_change_event);
3195
3196                 mono_threads_unlock ();
3197         }
3198 }
3199
3200 void mono_thread_manage (void)
3201 {
3202         struct wait_data wait_data;
3203         struct wait_data *wait = &wait_data;
3204
3205         memset (wait, 0, sizeof (struct wait_data));
3206         /* join each thread that's still running */
3207         THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3208
3209         mono_threads_lock ();
3210         if(threads==NULL) {
3211                 THREAD_DEBUG (g_message("%s: No threads", __func__));
3212                 mono_threads_unlock ();
3213                 return;
3214         }
3215         mono_threads_unlock ();
3216
3217         do {
3218                 mono_threads_lock ();
3219                 if (shutting_down) {
3220                         /* somebody else is shutting down */
3221                         mono_threads_unlock ();
3222                         break;
3223                 }
3224                 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3225                         mono_g_hash_table_foreach (threads, print_tids, NULL));
3226
3227                 ResetEvent (background_change_event);
3228                 wait->num=0;
3229                 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3230                 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3231                 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3232                 mono_threads_unlock ();
3233                 if(wait->num>0) {
3234                         /* Something to wait for */
3235                         wait_for_tids_or_state_change (wait, INFINITE);
3236                 }
3237                 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3238         } while(wait->num>0);
3239
3240         /* Mono is shutting down, so just wait for the end */
3241         if (!mono_runtime_try_shutdown ()) {
3242                 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3243                 mono_thread_suspend (mono_thread_internal_current ());
3244                 mono_thread_execute_interruption ();
3245         }
3246
3247         /*
3248          * Remove everything but the finalizer thread and self.
3249          * Also abort all the background threads
3250          * */
3251         do {
3252                 mono_threads_lock ();
3253
3254                 wait->num = 0;
3255                 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3256                 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3257                 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3258
3259                 mono_threads_unlock ();
3260
3261                 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3262                 if(wait->num>0) {
3263                         /* Something to wait for */
3264                         wait_for_tids (wait, INFINITE);
3265                 }
3266         } while (wait->num > 0);
3267
3268         /*
3269          * give the subthreads a chance to really quit (this is mainly needed
3270          * to get correct user and system times from getrusage/wait/time(1)).
3271          * This could be removed if we avoid pthread_detach() and use pthread_join().
3272          */
3273         mono_thread_info_yield ();
3274 }
3275
3276 static void
3277 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3278 {
3279         MonoInternalThread *thread = (MonoInternalThread*)value;
3280         struct wait_data *wait = (struct wait_data*)user_data;
3281         HANDLE handle;
3282
3283         /*
3284          * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3285          * limitation.
3286          * This needs no locking.
3287          */
3288         if ((thread->state & ThreadState_Suspended) != 0 ||
3289                 (thread->state & ThreadState_Stopped) != 0)
3290                 return;
3291
3292         if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3293                 handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3294                 if (handle == NULL)
3295                         return;
3296
3297                 wait->handles [wait->num] = handle;
3298                 wait->threads [wait->num] = thread;
3299                 wait->num++;
3300         }
3301 }
3302
3303 /*
3304  * mono_thread_suspend_all_other_threads:
3305  *
3306  *  Suspend all managed threads except the finalizer thread and this thread. It is
3307  * not possible to resume them later.
3308  */
3309 void mono_thread_suspend_all_other_threads (void)
3310 {
3311         struct wait_data wait_data;
3312         struct wait_data *wait = &wait_data;
3313         int i;
3314         MonoNativeThreadId self = mono_native_thread_id_get ();
3315         guint32 eventidx = 0;
3316         gboolean starting, finished;
3317
3318         memset (wait, 0, sizeof (struct wait_data));
3319         /*
3320          * The other threads could be in an arbitrary state at this point, i.e.
3321          * they could be starting up, shutting down etc. This means that there could be
3322          * threads which are not even in the threads hash table yet.
3323          */
3324
3325         /*
3326          * First we set a barrier which will be checked by all threads before they
3327          * are added to the threads hash table, and they will exit if the flag is set.
3328          * This ensures that no threads could be added to the hash later.
3329          * We will use shutting_down as the barrier for now.
3330          */
3331         g_assert (shutting_down);
3332
3333         /*
3334          * We make multiple calls to WaitForMultipleObjects since:
3335          * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3336          * - some threads could exit without becoming suspended
3337          */
3338         finished = FALSE;
3339         while (!finished) {
3340                 /*
3341                  * Make a copy of the hashtable since we can't do anything with
3342                  * threads while threads_mutex is held.
3343                  */
3344                 wait->num = 0;
3345                 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3346                 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3347                 mono_threads_lock ();
3348                 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3349                 mono_threads_unlock ();
3350
3351                 eventidx = 0;
3352                 /* Get the suspended events that we'll be waiting for */
3353                 for (i = 0; i < wait->num; ++i) {
3354                         MonoInternalThread *thread = wait->threads [i];
3355
3356                         if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3357                              || mono_gc_is_finalizer_internal_thread (thread)
3358                              || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3359                         ) {
3360                                 //mono_threads_close_thread_handle (wait->handles [i]);
3361                                 wait->threads [i] = NULL; /* ignore this thread in next loop */
3362                                 continue;
3363                         }
3364
3365                         LOCK_THREAD (thread);
3366
3367                         if ((thread->state & ThreadState_Suspended) != 0 ||
3368                                 (thread->state & ThreadState_StopRequested) != 0 ||
3369                                 (thread->state & ThreadState_Stopped) != 0) {
3370                                 UNLOCK_THREAD (thread);
3371                                 mono_threads_close_thread_handle (wait->handles [i]);
3372                                 wait->threads [i] = NULL; /* ignore this thread in next loop */
3373                                 continue;
3374                         }
3375
3376                         ++eventidx;
3377
3378                         /* Convert abort requests into suspend requests */
3379                         if ((thread->state & ThreadState_AbortRequested) != 0)
3380                                 thread->state &= ~ThreadState_AbortRequested;
3381
3382                         thread->state |= ThreadState_SuspendRequested;
3383
3384                         /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3385                         async_suspend_internal (thread, TRUE);
3386                 }
3387                 if (eventidx <= 0) {
3388                         /*
3389                          * If there are threads which are starting up, we wait until they
3390                          * are suspended when they try to register in the threads hash.
3391                          * This is guaranteed to finish, since the threads which can create new
3392                          * threads get suspended after a while.
3393                          * FIXME: The finalizer thread can still create new threads.
3394                          */
3395                         mono_threads_lock ();
3396                         if (threads_starting_up)
3397                                 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3398                         else
3399                                 starting = FALSE;
3400                         mono_threads_unlock ();
3401                         if (starting)
3402                                 mono_thread_info_sleep (100, NULL);
3403                         else
3404                                 finished = TRUE;
3405                 }
3406         }
3407 }
3408
3409 typedef struct {
3410         MonoInternalThread *thread;
3411         MonoStackFrameInfo *frames;
3412         int nframes, max_frames;
3413         int nthreads, max_threads;
3414         MonoInternalThread **threads;
3415 } ThreadDumpUserData;
3416
3417 static gboolean thread_dump_requested;
3418
3419 /* This needs to be async safe */
3420 static gboolean
3421 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3422 {
3423         ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3424
3425         if (ud->nframes < ud->max_frames) {
3426                 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3427                 ud->nframes ++;
3428         }
3429
3430         return FALSE;
3431 }
3432
3433 /* This needs to be async safe */
3434 static SuspendThreadResult
3435 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3436 {
3437         ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3438         MonoInternalThread *thread = user_data->thread;
3439
3440 #if 0
3441 /* This no longer works with remote unwinding */
3442         g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3443         mono_thread_info_describe (info, text);
3444         g_string_append (text, "\n");
3445 #endif
3446
3447         if (thread == mono_thread_internal_current ())
3448                 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3449         else
3450                 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3451
3452         return MonoResumeThread;
3453 }
3454
3455 typedef struct {
3456         int nthreads, max_threads;
3457         MonoInternalThread **threads;
3458 } CollectThreadsUserData;
3459
3460 static void
3461 collect_thread (gpointer key, gpointer value, gpointer user)
3462 {
3463         CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3464         MonoInternalThread *thread = (MonoInternalThread *)value;
3465
3466         if (ud->nthreads < ud->max_threads)
3467                 ud->threads [ud->nthreads ++] = thread;
3468 }
3469
3470 /*
3471  * Collect running threads into the THREADS array.
3472  * THREADS should be an array allocated on the stack.
3473  */
3474 static int
3475 collect_threads (MonoInternalThread **thread_array, int max_threads)
3476 {
3477         CollectThreadsUserData ud;
3478
3479         memset (&ud, 0, sizeof (ud));
3480         /* This array contains refs, but its on the stack, so its ok */
3481         ud.threads = thread_array;
3482         ud.max_threads = max_threads;
3483
3484         mono_threads_lock ();
3485         mono_g_hash_table_foreach (threads, collect_thread, &ud);
3486         mono_threads_unlock ();
3487
3488         return ud.nthreads;
3489 }
3490
3491 static void
3492 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3493 {
3494         GString* text = g_string_new (0);
3495         char *name;
3496         GError *error = NULL;
3497         int i;
3498
3499         ud->thread = thread;
3500         ud->nframes = 0;
3501
3502         /* Collect frames for the thread */
3503         if (thread == mono_thread_internal_current ()) {
3504                 get_thread_dump (mono_thread_info_current (), ud);
3505         } else {
3506                 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3507         }
3508
3509         /*
3510          * Do all the non async-safe work outside of get_thread_dump.
3511          */
3512         if (thread->name) {
3513                 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3514                 g_assert (!error);
3515                 g_string_append_printf (text, "\n\"%s\"", name);
3516                 g_free (name);
3517         }
3518         else if (thread->threadpool_thread) {
3519                 g_string_append (text, "\n\"<threadpool thread>\"");
3520         } else {
3521                 g_string_append (text, "\n\"<unnamed thread>\"");
3522         }
3523
3524         for (i = 0; i < ud->nframes; ++i) {
3525                 MonoStackFrameInfo *frame = &ud->frames [i];
3526                 MonoMethod *method = NULL;
3527
3528                 if (frame->type == FRAME_TYPE_MANAGED)
3529                         method = mono_jit_info_get_method (frame->ji);
3530
3531                 if (method) {
3532                         gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3533                         g_string_append_printf (text, "  %s\n", location);
3534                         g_free (location);
3535                 } else {
3536                         g_string_append_printf (text, "  at <unknown> <0x%05x>\n", frame->native_offset);
3537                 }
3538         }
3539
3540         fprintf (stdout, "%s", text->str);
3541
3542 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3543         OutputDebugStringA(text->str);
3544 #endif
3545
3546         g_string_free (text, TRUE);
3547         fflush (stdout);
3548 }
3549
3550 void
3551 mono_threads_perform_thread_dump (void)
3552 {
3553         ThreadDumpUserData ud;
3554         MonoInternalThread *thread_array [128];
3555         int tindex, nthreads;
3556
3557         if (!thread_dump_requested)
3558                 return;
3559
3560         printf ("Full thread dump:\n");
3561
3562         /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3563         nthreads = collect_threads (thread_array, 128);
3564
3565         memset (&ud, 0, sizeof (ud));
3566         ud.frames = g_new0 (MonoStackFrameInfo, 256);
3567         ud.max_frames = 256;
3568
3569         for (tindex = 0; tindex < nthreads; ++tindex)
3570                 dump_thread (thread_array [tindex], &ud);
3571
3572         g_free (ud.frames);
3573
3574         thread_dump_requested = FALSE;
3575 }
3576
3577 /* Obtain the thread dump of all threads */
3578 static gboolean
3579 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3580 {
3581
3582         ThreadDumpUserData ud;
3583         MonoInternalThread *thread_array [128];
3584         MonoDomain *domain = mono_domain_get ();
3585         MonoDebugSourceLocation *location;
3586         int tindex, nthreads;
3587
3588         mono_error_init (error);
3589
3590         *out_threads = NULL;
3591         *out_stack_frames = NULL;
3592
3593         /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3594         nthreads = collect_threads (thread_array, 128);
3595
3596         memset (&ud, 0, sizeof (ud));
3597         ud.frames = g_new0 (MonoStackFrameInfo, 256);
3598         ud.max_frames = 256;
3599
3600         *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3601         if (!is_ok (error))
3602                 goto leave;
3603         *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3604         if (!is_ok (error))
3605                 goto leave;
3606
3607         for (tindex = 0; tindex < nthreads; ++tindex) {
3608                 MonoInternalThread *thread = thread_array [tindex];
3609                 MonoArray *thread_frames;
3610                 int i;
3611
3612                 ud.thread = thread;
3613                 ud.nframes = 0;
3614
3615                 /* Collect frames for the thread */
3616                 if (thread == mono_thread_internal_current ()) {
3617                         get_thread_dump (mono_thread_info_current (), &ud);
3618                 } else {
3619                         mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3620                 }
3621
3622                 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3623
3624                 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3625                 if (!is_ok (error))
3626                         goto leave;
3627                 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3628
3629                 for (i = 0; i < ud.nframes; ++i) {
3630                         MonoStackFrameInfo *frame = &ud.frames [i];
3631                         MonoMethod *method = NULL;
3632                         MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3633                         if (!is_ok (error))
3634                                 goto leave;
3635
3636                         sf->native_offset = frame->native_offset;
3637
3638                         if (frame->type == FRAME_TYPE_MANAGED)
3639                                 method = mono_jit_info_get_method (frame->ji);
3640
3641                         if (method) {
3642                                 sf->method_address = (gsize) frame->ji->code_start;
3643
3644                                 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3645                                 if (!is_ok (error))
3646                                         goto leave;
3647                                 MONO_OBJECT_SETREF (sf, method, rm);
3648
3649                                 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3650                                 if (location) {
3651                                         sf->il_offset = location->il_offset;
3652
3653                                         if (location && location->source_file) {
3654                                                 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3655                                                 sf->line = location->row;
3656                                                 sf->column = location->column;
3657                                         }
3658                                         mono_debug_free_source_location (location);
3659                                 } else {
3660                                         sf->il_offset = -1;
3661                                 }
3662                         }
3663                         mono_array_setref (thread_frames, i, sf);
3664                 }
3665         }
3666
3667 leave:
3668         g_free (ud.frames);
3669         return is_ok (error);
3670 }
3671
3672 /**
3673  * mono_threads_request_thread_dump:
3674  *
3675  *   Ask all threads except the current to print their stacktrace to stdout.
3676  */
3677 void
3678 mono_threads_request_thread_dump (void)
3679 {
3680         /*The new thread dump code runs out of the finalizer thread. */
3681         thread_dump_requested = TRUE;
3682         mono_gc_finalize_notify ();
3683 }
3684
3685 struct ref_stack {
3686         gpointer *refs;
3687         gint allocated; /* +1 so that refs [allocated] == NULL */
3688         gint bottom;
3689 };
3690
3691 typedef struct ref_stack RefStack;
3692
3693 static RefStack *
3694 ref_stack_new (gint initial_size)
3695 {
3696         RefStack *rs;
3697
3698         initial_size = MAX (initial_size, 16) + 1;
3699         rs = g_new0 (RefStack, 1);
3700         rs->refs = g_new0 (gpointer, initial_size);
3701         rs->allocated = initial_size;
3702         return rs;
3703 }
3704
3705 static void
3706 ref_stack_destroy (gpointer ptr)
3707 {
3708         RefStack *rs = (RefStack *)ptr;
3709
3710         if (rs != NULL) {
3711                 g_free (rs->refs);
3712                 g_free (rs);
3713         }
3714 }
3715
3716 static void
3717 ref_stack_push (RefStack *rs, gpointer ptr)
3718 {
3719         g_assert (rs != NULL);
3720
3721         if (rs->bottom >= rs->allocated) {
3722                 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3723                 rs->allocated <<= 1;
3724                 rs->refs [rs->allocated] = NULL;
3725         }
3726         rs->refs [rs->bottom++] = ptr;
3727 }
3728
3729 static void
3730 ref_stack_pop (RefStack *rs)
3731 {
3732         if (rs == NULL || rs->bottom == 0)
3733                 return;
3734
3735         rs->bottom--;
3736         rs->refs [rs->bottom] = NULL;
3737 }
3738
3739 static gboolean
3740 ref_stack_find (RefStack *rs, gpointer ptr)
3741 {
3742         gpointer *refs;
3743
3744         if (rs == NULL)
3745                 return FALSE;
3746
3747         for (refs = rs->refs; refs && *refs; refs++) {
3748                 if (*refs == ptr)
3749                         return TRUE;
3750         }
3751         return FALSE;
3752 }
3753
3754 /*
3755  * mono_thread_push_appdomain_ref:
3756  *
3757  *   Register that the current thread may have references to objects in domain
3758  * @domain on its stack. Each call to this function should be paired with a
3759  * call to pop_appdomain_ref.
3760  */
3761 void
3762 mono_thread_push_appdomain_ref (MonoDomain *domain)
3763 {
3764         MonoInternalThread *thread = mono_thread_internal_current ();
3765
3766         if (thread) {
3767                 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3768                 SPIN_LOCK (thread->lock_thread_id);
3769                 if (thread->appdomain_refs == NULL)
3770                         thread->appdomain_refs = ref_stack_new (16);
3771                 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3772                 SPIN_UNLOCK (thread->lock_thread_id);
3773         }
3774 }
3775
3776 void
3777 mono_thread_pop_appdomain_ref (void)
3778 {
3779         MonoInternalThread *thread = mono_thread_internal_current ();
3780
3781         if (thread) {
3782                 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3783                 SPIN_LOCK (thread->lock_thread_id);
3784                 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3785                 SPIN_UNLOCK (thread->lock_thread_id);
3786         }
3787 }
3788
3789 gboolean
3790 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3791 {
3792         gboolean res;
3793         SPIN_LOCK (thread->lock_thread_id);
3794         res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3795         SPIN_UNLOCK (thread->lock_thread_id);
3796         return res;
3797 }
3798
3799 gboolean
3800 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3801 {
3802         return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3803 }
3804
3805 typedef struct abort_appdomain_data {
3806         struct wait_data wait;
3807         MonoDomain *domain;
3808 } abort_appdomain_data;
3809
3810 static void
3811 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3812 {
3813         MonoInternalThread *thread = (MonoInternalThread*)value;
3814         abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3815         MonoDomain *domain = data->domain;
3816
3817         if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3818                 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3819
3820                 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3821                         HANDLE handle = mono_threads_open_thread_handle (thread->handle, thread_get_tid (thread));
3822                         if (handle == NULL)
3823                                 return;
3824                         data->wait.handles [data->wait.num] = handle;
3825                         data->wait.threads [data->wait.num] = thread;
3826                         data->wait.num++;
3827                 } else {
3828                         /* Just ignore the rest, we can't do anything with
3829                          * them yet
3830                          */
3831                 }
3832         }
3833 }
3834
3835 /*
3836  * mono_threads_abort_appdomain_threads:
3837  *
3838  *   Abort threads which has references to the given appdomain.
3839  */
3840 gboolean
3841 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3842 {
3843 #ifdef __native_client__
3844         return FALSE;
3845 #endif
3846
3847         abort_appdomain_data user_data;
3848         gint64 start_time;
3849         int orig_timeout = timeout;
3850         int i;
3851
3852         THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3853
3854         start_time = mono_msec_ticks ();
3855         do {
3856                 mono_threads_lock ();
3857
3858                 user_data.domain = domain;
3859                 user_data.wait.num = 0;
3860                 /* This shouldn't take any locks */
3861                 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3862                 mono_threads_unlock ();
3863
3864                 if (user_data.wait.num > 0) {
3865                         /* Abort the threads outside the threads lock */
3866                         for (i = 0; i < user_data.wait.num; ++i)
3867                                 mono_thread_internal_abort (user_data.wait.threads [i]);
3868
3869                         /*
3870                          * We should wait for the threads either to abort, or to leave the
3871                          * domain. We can't do the latter, so we wait with a timeout.
3872                          */
3873                         wait_for_tids (&user_data.wait, 100);
3874                 }
3875
3876                 /* Update remaining time */
3877                 timeout -= mono_msec_ticks () - start_time;
3878                 start_time = mono_msec_ticks ();
3879
3880                 if (orig_timeout != -1 && timeout < 0)
3881                         return FALSE;
3882         }
3883         while (user_data.wait.num > 0);
3884
3885         THREAD_DEBUG (g_message ("%s: abort done", __func__));
3886
3887         return TRUE;
3888 }
3889
3890 static void
3891 clear_cached_culture (gpointer key, gpointer value, gpointer user_data)
3892 {
3893         MonoInternalThread *thread = (MonoInternalThread*)value;
3894         MonoDomain *domain = (MonoDomain*)user_data;
3895         int i;
3896
3897         /* No locking needed here */
3898         /* FIXME: why no locking? writes to the cache are protected with synch_cs above */
3899
3900         if (thread->cached_culture_info) {
3901                 for (i = 0; i < NUM_CACHED_CULTURES * 2; ++i) {
3902                         MonoObject *obj = mono_array_get (thread->cached_culture_info, MonoObject*, i);
3903                         if (obj && obj->vtable->domain == domain)
3904                                 mono_array_set (thread->cached_culture_info, MonoObject*, i, NULL);
3905                 }
3906         }
3907 }
3908
3909 /*
3910  * mono_threads_clear_cached_culture:
3911  *
3912  *   Clear the cached_current_culture from all threads if it is in the
3913  * given appdomain.
3914  */
3915 void
3916 mono_threads_clear_cached_culture (MonoDomain *domain)
3917 {
3918         mono_threads_lock ();
3919         mono_g_hash_table_foreach (threads, clear_cached_culture, domain);
3920         mono_threads_unlock ();
3921 }
3922
3923 /*
3924  * mono_thread_get_undeniable_exception:
3925  *
3926  *   Return an exception which needs to be raised when leaving a catch clause.
3927  * This is used for undeniable exception propagation.
3928  */
3929 MonoException*
3930 mono_thread_get_undeniable_exception (void)
3931 {
3932         MonoInternalThread *thread = mono_thread_internal_current ();
3933
3934         if (thread && thread->abort_exc && !is_running_protected_wrapper ()) {
3935                 /*
3936                  * FIXME: Clear the abort exception and return an AppDomainUnloaded
3937                  * exception if the thread no longer references a dying appdomain.
3938                  */
3939                 thread->abort_exc->trace_ips = NULL;
3940                 thread->abort_exc->stack_trace = NULL;
3941                 return thread->abort_exc;
3942         }
3943
3944         return NULL;
3945 }
3946
3947 #if MONO_SMALL_CONFIG
3948 #define NUM_STATIC_DATA_IDX 4
3949 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3950         64, 256, 1024, 4096
3951 };
3952 #else
3953 #define NUM_STATIC_DATA_IDX 8
3954 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3955         1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3956 };
3957 #endif
3958
3959 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3960 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3961
3962 static void
3963 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3964 {
3965         gpointer *static_data = (gpointer *)addr;
3966
3967         for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3968                 void **ptr = (void **)static_data [i];
3969
3970                 if (!ptr)
3971                         continue;
3972
3973                 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3974                         void **p = ptr + idx;
3975
3976                         if (*p)
3977                                 mark_func ((MonoObject**)p, gc_data);
3978                 });
3979         }
3980 }
3981
3982 static void
3983 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3984 {
3985         mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3986 }
3987
3988 static void
3989 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3990 {
3991         mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3992 }
3993
3994 /*
3995  *  mono_alloc_static_data
3996  *
3997  *   Allocate memory blocks for storing threads or context static data
3998  */
3999 static void
4000 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4001 {
4002         guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4003         int i;
4004
4005         gpointer* static_data = *static_data_ptr;
4006         if (!static_data) {
4007                 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4008                 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4009
4010                 if (mono_gc_user_markers_supported ()) {
4011                         if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4012                                 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4013
4014                         if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4015                                 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4016                 }
4017
4018                 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4019                         threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4020                         threadlocal ? "managed thread-static variables" : "managed context-static variables");
4021                 *static_data_ptr = static_data;
4022                 static_data [0] = static_data;
4023         }
4024
4025         for (i = 1; i <= idx; ++i) {
4026                 if (static_data [i])
4027                         continue;
4028
4029                 if (mono_gc_user_markers_supported ())
4030                         static_data [i] = g_malloc0 (static_data_size [i]);
4031                 else
4032                         static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4033                                 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4034                                 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4035         }
4036 }
4037
4038 static void
4039 mono_free_static_data (gpointer* static_data)
4040 {
4041         int i;
4042         for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4043                 gpointer p = static_data [i];
4044                 if (!p)
4045                         continue;
4046                 /*
4047                  * At this point, the static data pointer array is still registered with the
4048                  * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4049                  * data.  Freeing the individual arrays without first nulling their slots
4050                  * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4051                  * such an already freed array.  See bug #13813.
4052                  */
4053                 static_data [i] = NULL;
4054                 mono_memory_write_barrier ();
4055                 if (mono_gc_user_markers_supported ())
4056                         g_free (p);
4057                 else
4058                         mono_gc_free_fixed (p);
4059         }
4060         mono_gc_free_fixed (static_data);
4061 }
4062
4063 /*
4064  *  mono_init_static_data_info
4065  *
4066  *   Initializes static data counters
4067  */
4068 static void mono_init_static_data_info (StaticDataInfo *static_data)
4069 {
4070         static_data->idx = 0;
4071         static_data->offset = 0;
4072         static_data->freelist = NULL;
4073 }
4074
4075 /*
4076  *  mono_alloc_static_data_slot
4077  *
4078  *   Generates an offset for static data. static_data contains the counters
4079  *  used to generate it.
4080  */
4081 static guint32
4082 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4083 {
4084         if (!static_data->idx && !static_data->offset) {
4085                 /*
4086                  * we use the first chunk of the first allocation also as
4087                  * an array for the rest of the data
4088                  */
4089                 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4090         }
4091         static_data->offset += align - 1;
4092         static_data->offset &= ~(align - 1);
4093         if (static_data->offset + size >= static_data_size [static_data->idx]) {
4094                 static_data->idx ++;
4095                 g_assert (size <= static_data_size [static_data->idx]);
4096                 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4097                 static_data->offset = 0;
4098         }
4099         guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4100         static_data->offset += size;
4101         return offset;
4102 }
4103
4104 /*
4105  * LOCKING: requires that threads_mutex is held
4106  */
4107 static void
4108 context_adjust_static_data (MonoAppContext *ctx)
4109 {
4110         if (context_static_info.offset || context_static_info.idx > 0) {
4111                 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4112                 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4113                 ctx->data->static_data = ctx->static_data;
4114         }
4115 }
4116
4117 /*
4118  * LOCKING: requires that threads_mutex is held
4119  */
4120 static void
4121 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4122 {
4123         MonoInternalThread *thread = (MonoInternalThread *)value;
4124         guint32 offset = GPOINTER_TO_UINT (user);
4125
4126         mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4127 }
4128
4129 /*
4130  * LOCKING: requires that threads_mutex is held
4131  */
4132 static void
4133 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4134 {
4135         MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4136
4137         if (!ctx)
4138                 return;
4139
4140         guint32 offset = GPOINTER_TO_UINT (user);
4141         mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4142         ctx->data->static_data = ctx->static_data;
4143 }
4144
4145 static StaticDataFreeList*
4146 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4147 {
4148         StaticDataFreeList* prev = NULL;
4149         StaticDataFreeList* tmp = static_data->freelist;
4150         while (tmp) {
4151                 if (tmp->size == size) {
4152                         if (prev)
4153                                 prev->next = tmp->next;
4154                         else
4155                                 static_data->freelist = tmp->next;
4156                         return tmp;
4157                 }
4158                 prev = tmp;
4159                 tmp = tmp->next;
4160         }
4161         return NULL;
4162 }
4163
4164 #if SIZEOF_VOID_P == 4
4165 #define ONE_P 1
4166 #else
4167 #define ONE_P 1ll
4168 #endif
4169
4170 static void
4171 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4172 {
4173         int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4174         if (!sets [idx])
4175                 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4176         MonoBitSet *rb = sets [idx];
4177         offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4178         offset /= sizeof (uintptr_t);
4179         /* offset is now the bitmap offset */
4180         for (int i = 0; i < numbits; ++i) {
4181                 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4182                         mono_bitset_set_fast (rb, offset + i);
4183         }
4184 }
4185
4186 static void
4187 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4188 {
4189         int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4190         MonoBitSet *rb = sets [idx];
4191         offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4192         offset /= sizeof (uintptr_t);
4193         /* offset is now the bitmap offset */
4194         for (int i = 0; i < size / sizeof (uintptr_t); i++)
4195                 mono_bitset_clear_fast (rb, offset + i);
4196 }
4197
4198 guint32
4199 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4200 {
4201         g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4202
4203         StaticDataInfo *info;
4204         MonoBitSet **sets;
4205
4206         if (static_type == SPECIAL_STATIC_THREAD) {
4207                 info = &thread_static_info;
4208                 sets = thread_reference_bitmaps;
4209         } else {
4210                 info = &context_static_info;
4211                 sets = context_reference_bitmaps;
4212         }
4213
4214         mono_threads_lock ();
4215
4216         StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4217         guint32 offset;
4218
4219         if (item) {
4220                 offset = item->offset;
4221                 g_free (item);
4222         } else {
4223                 offset = mono_alloc_static_data_slot (info, size, align);
4224         }
4225
4226         update_reference_bitmap (sets, offset, bitmap, numbits);
4227
4228         if (static_type == SPECIAL_STATIC_THREAD) {
4229                 /* This can be called during startup */
4230                 if (threads != NULL)
4231                         mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4232         } else {
4233                 if (contexts != NULL)
4234                         g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4235
4236                 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4237         }
4238
4239         mono_threads_unlock ();
4240
4241         return offset;
4242 }
4243
4244 gpointer
4245 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4246 {
4247         guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4248
4249         if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4250                 return get_thread_static_data (thread, offset);
4251         } else {
4252                 return get_context_static_data (thread->current_appcontext, offset);
4253         }
4254 }
4255
4256 gpointer
4257 mono_get_special_static_data (guint32 offset)
4258 {
4259         return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4260 }
4261
4262 typedef struct {
4263         guint32 offset;
4264         guint32 size;
4265 } OffsetSize;
4266
4267 /*
4268  * LOCKING: requires that threads_mutex is held
4269  */
4270 static void
4271 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4272 {
4273         MonoInternalThread *thread = (MonoInternalThread *)value;
4274         OffsetSize *data = (OffsetSize *)user;
4275         int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4276         int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4277         char *ptr;
4278
4279         if (!thread->static_data || !thread->static_data [idx])
4280                 return;
4281         ptr = ((char*) thread->static_data [idx]) + off;
4282         mono_gc_bzero_atomic (ptr, data->size);
4283 }
4284
4285 /*
4286  * LOCKING: requires that threads_mutex is held
4287  */
4288 static void
4289 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4290 {
4291         MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4292
4293         if (!ctx)
4294                 return;
4295
4296         OffsetSize *data = (OffsetSize *)user;
4297         int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4298         int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4299         char *ptr;
4300
4301         if (!ctx->static_data || !ctx->static_data [idx])
4302                 return;
4303
4304         ptr = ((char*) ctx->static_data [idx]) + off;
4305         mono_gc_bzero_atomic (ptr, data->size);
4306 }
4307
4308 static void
4309 do_free_special_slot (guint32 offset, guint32 size)
4310 {
4311         guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4312         MonoBitSet **sets;
4313         StaticDataInfo *info;
4314
4315         if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4316                 info = &thread_static_info;
4317                 sets = thread_reference_bitmaps;
4318         } else {
4319                 info = &context_static_info;
4320                 sets = context_reference_bitmaps;
4321         }
4322
4323         guint32 data_offset = offset;
4324         ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4325         OffsetSize data = { data_offset, size };
4326
4327         clear_reference_bitmap (sets, data.offset, data.size);
4328
4329         if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4330                 if (threads != NULL)
4331                         mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4332         } else {
4333                 if (contexts != NULL)
4334                         g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4335         }
4336
4337         if (!mono_runtime_is_shutting_down ()) {
4338                 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4339
4340                 item->offset = offset;
4341                 item->size = size;
4342
4343                 item->next = info->freelist;
4344                 info->freelist = item;
4345         }
4346 }
4347
4348 static void
4349 do_free_special (gpointer key, gpointer value, gpointer data)
4350 {
4351         MonoClassField *field = (MonoClassField *)key;
4352         guint32 offset = GPOINTER_TO_UINT (value);
4353         gint32 align;
4354         guint32 size;
4355         size = mono_type_size (field->type, &align);
4356         do_free_special_slot (offset, size);
4357 }
4358
4359 void
4360 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4361 {
4362         mono_threads_lock ();
4363
4364         g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4365
4366         mono_threads_unlock ();
4367 }
4368
4369 #ifdef HOST_WIN32
4370 static void CALLBACK dummy_apc (ULONG_PTR param)
4371 {
4372 }
4373 #endif
4374
4375 /*
4376  * mono_thread_execute_interruption
4377  *
4378  * Performs the operation that the requested thread state requires (abort,
4379  * suspend or stop)
4380  */
4381 static MonoException*
4382 mono_thread_execute_interruption (void)
4383 {
4384         MonoInternalThread *thread = mono_thread_internal_current ();
4385         MonoThread *sys_thread = mono_thread_current ();
4386
4387         LOCK_THREAD (thread);
4388
4389         /* MonoThread::interruption_requested can only be changed with atomics */
4390         if (InterlockedCompareExchange (&thread->interruption_requested, FALSE, TRUE)) {
4391                 /* this will consume pending APC calls */
4392 #ifdef HOST_WIN32
4393                 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4394 #endif
4395                 InterlockedDecrement (&thread_interruption_requested);
4396
4397                 /* Clear the interrupted flag of the thread so it can wait again */
4398                 mono_thread_info_clear_self_interrupt ();
4399         }
4400
4401         /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4402         if (sys_thread->pending_exception) {
4403                 MonoException *exc;
4404
4405                 exc = sys_thread->pending_exception;
4406                 sys_thread->pending_exception = NULL;
4407
4408                 UNLOCK_THREAD (thread);
4409                 return exc;
4410         } else if ((thread->state & ThreadState_AbortRequested) != 0) {
4411                 UNLOCK_THREAD (thread);
4412                 g_assert (sys_thread->pending_exception == NULL);
4413                 if (thread->abort_exc == NULL) {
4414                         /*
4415                          * This might be racy, but it has to be called outside the lock
4416                          * since it calls managed code.
4417                          */
4418                         MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4419                 }
4420                 return thread->abort_exc;
4421         }
4422         else if ((thread->state & ThreadState_SuspendRequested) != 0) {
4423                 /* calls UNLOCK_THREAD (thread) */
4424                 self_suspend_internal ();
4425                 return NULL;
4426         }
4427         else if ((thread->state & ThreadState_StopRequested) != 0) {
4428                 /* FIXME: do this through the JIT? */
4429
4430                 UNLOCK_THREAD (thread);
4431
4432                 mono_thread_exit ();
4433                 return NULL;
4434         } else if (thread->thread_interrupt_requested) {
4435
4436                 thread->thread_interrupt_requested = FALSE;
4437                 UNLOCK_THREAD (thread);
4438
4439                 return(mono_get_exception_thread_interrupted ());
4440         }
4441
4442         UNLOCK_THREAD (thread);
4443
4444         return NULL;
4445 }
4446
4447 /*
4448  * mono_thread_request_interruption
4449  *
4450  * A signal handler can call this method to request the interruption of a
4451  * thread. The result of the interruption will depend on the current state of
4452  * the thread. If the result is an exception that needs to be throw, it is
4453  * provided as return value.
4454  */
4455 MonoException*
4456 mono_thread_request_interruption (gboolean running_managed)
4457 {
4458         MonoInternalThread *thread = mono_thread_internal_current ();
4459
4460         /* The thread may already be stopping */
4461         if (thread == NULL)
4462                 return NULL;
4463
4464 #ifdef HOST_WIN32
4465         if (thread->interrupt_on_stop &&
4466                 thread->state & ThreadState_StopRequested &&
4467                 thread->state & ThreadState_Background)
4468                 ExitThread (1);
4469 #endif
4470         if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4471                 return NULL;
4472         InterlockedIncrement (&thread_interruption_requested);
4473
4474         if (!running_managed || is_running_protected_wrapper ()) {
4475                 /* Can't stop while in unmanaged code. Increase the global interruption
4476                    request count. When exiting the unmanaged method the count will be
4477                    checked and the thread will be interrupted. */
4478
4479                 /* this will awake the thread if it is in WaitForSingleObject
4480                    or similar */
4481                 /* Our implementation of this function ignores the func argument */
4482 #ifdef HOST_WIN32
4483                 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->handle, (ULONG_PTR)NULL);
4484 #else
4485                 mono_thread_info_self_interrupt ();
4486 #endif
4487                 return NULL;
4488         }
4489         else {
4490                 return mono_thread_execute_interruption ();
4491         }
4492 }
4493
4494 /*This function should be called by a thread after it has exited all of
4495  * its handle blocks at interruption time.*/
4496 MonoException*
4497 mono_thread_resume_interruption (void)
4498 {
4499         MonoInternalThread *thread = mono_thread_internal_current ();
4500         gboolean still_aborting;
4501
4502         /* The thread may already be stopping */
4503         if (thread == NULL)
4504                 return NULL;
4505
4506         LOCK_THREAD (thread);
4507         still_aborting = (thread->state & (ThreadState_AbortRequested|ThreadState_StopRequested)) != 0;
4508         UNLOCK_THREAD (thread);
4509
4510         /*This can happen if the protected block called Thread::ResetAbort*/
4511         if (!still_aborting)
4512                 return FALSE;
4513
4514         if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4515                 return NULL;
4516         InterlockedIncrement (&thread_interruption_requested);
4517
4518         mono_thread_info_self_interrupt ();
4519
4520         return mono_thread_execute_interruption ();
4521 }
4522
4523 gboolean mono_thread_interruption_requested ()
4524 {
4525         if (thread_interruption_requested) {
4526                 MonoInternalThread *thread = mono_thread_internal_current ();
4527                 /* The thread may already be stopping */
4528                 if (thread != NULL)
4529                         return (thread->interruption_requested);
4530         }
4531         return FALSE;
4532 }
4533
4534 static MonoException*
4535 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4536 {
4537         MonoInternalThread *thread = mono_thread_internal_current ();
4538
4539         /* The thread may already be stopping */
4540         if (thread == NULL)
4541                 return NULL;
4542
4543         if (thread->interruption_requested && (bypass_abort_protection || !is_running_protected_wrapper ())) {
4544                 MonoException* exc = mono_thread_execute_interruption ();
4545                 if (exc)
4546                         return exc;
4547         }
4548         return NULL;
4549 }
4550
4551 /*
4552  * Performs the interruption of the current thread, if one has been requested,
4553  * and the thread is not running a protected wrapper.
4554  * Return the exception which needs to be thrown, if any.
4555  */
4556 MonoException*
4557 mono_thread_interruption_checkpoint (void)
4558 {
4559         return mono_thread_interruption_checkpoint_request (FALSE);
4560 }
4561
4562 /*
4563  * Performs the interruption of the current thread, if one has been requested.
4564  * Return the exception which needs to be thrown, if any.
4565  */
4566 MonoException*
4567 mono_thread_force_interruption_checkpoint_noraise (void)
4568 {
4569         return mono_thread_interruption_checkpoint_request (TRUE);
4570 }
4571
4572 /*
4573  * mono_set_pending_exception:
4574  *
4575  *   Set the pending exception of the current thread to EXC.
4576  * The exception will be thrown when execution returns to managed code.
4577  */
4578 void
4579 mono_set_pending_exception (MonoException *exc)
4580 {
4581         MonoThread *thread = mono_thread_current ();
4582
4583         /* The thread may already be stopping */
4584         if (thread == NULL)
4585                 return;
4586
4587         MONO_OBJECT_SETREF (thread, pending_exception, exc);
4588
4589     mono_thread_request_interruption (FALSE);
4590 }
4591
4592 /**
4593  * mono_thread_interruption_request_flag:
4594  *
4595  * Returns the address of a flag that will be non-zero if an interruption has
4596  * been requested for a thread. The thread to interrupt may not be the current
4597  * thread, so an additional call to mono_thread_interruption_requested() or
4598  * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4599  * zero.
4600  */
4601 gint32* mono_thread_interruption_request_flag ()
4602 {
4603         return &thread_interruption_requested;
4604 }
4605
4606 void
4607 mono_thread_init_apartment_state (void)
4608 {
4609 #ifdef HOST_WIN32
4610         MonoInternalThread* thread = mono_thread_internal_current ();
4611
4612         /* Positive return value indicates success, either
4613          * S_OK if this is first CoInitialize call, or
4614          * S_FALSE if CoInitialize already called, but with same
4615          * threading model. A negative value indicates failure,
4616          * probably due to trying to change the threading model.
4617          */
4618         if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4619                         ? COINIT_APARTMENTTHREADED
4620                         : COINIT_MULTITHREADED) < 0) {
4621                 thread->apartment_state = ThreadApartmentState_Unknown;
4622         }
4623 #endif
4624 }
4625
4626 void
4627 mono_thread_cleanup_apartment_state (void)
4628 {
4629 #ifdef HOST_WIN32
4630         MonoInternalThread* thread = mono_thread_internal_current ();
4631
4632         if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4633                 CoUninitialize ();
4634         }
4635 #endif
4636 }
4637
4638 void
4639 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4640 {
4641         LOCK_THREAD (thread);
4642         thread->state |= state;
4643         UNLOCK_THREAD (thread);
4644 }
4645
4646 void
4647 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4648 {
4649         LOCK_THREAD (thread);
4650         thread->state &= ~state;
4651         UNLOCK_THREAD (thread);
4652 }
4653
4654 gboolean
4655 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4656 {
4657         gboolean ret = FALSE;
4658
4659         LOCK_THREAD (thread);
4660
4661         if ((thread->state & test) != 0) {
4662                 ret = TRUE;
4663         }
4664
4665         UNLOCK_THREAD (thread);
4666
4667         return ret;
4668 }
4669
4670 static gboolean has_tls_get = FALSE;
4671
4672 void
4673 mono_runtime_set_has_tls_get (gboolean val)
4674 {
4675         has_tls_get = val;
4676 }
4677
4678 gboolean
4679 mono_runtime_has_tls_get (void)
4680 {
4681         return has_tls_get;
4682 }
4683
4684 static void
4685 self_interrupt_thread (void *_unused)
4686 {
4687         MonoThreadInfo *info = mono_thread_info_current ();
4688         MonoException *exc = mono_thread_execute_interruption ();
4689         if (exc) /*We must use _with_context since we didn't trampoline into the runtime*/
4690                 mono_raise_exception_with_context (exc, &info->thread_saved_state [ASYNC_SUSPEND_STATE_INDEX].ctx); /* FIXME using thread_saved_state [ASYNC_SUSPEND_STATE_INDEX] can race with another suspend coming in. */
4691         g_assert_not_reached (); /*this MUST not happen since we can't resume from an async call*/
4692 }
4693
4694 static gboolean
4695 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4696 {
4697         if (!ji)
4698                 return FALSE;
4699         return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4700 }
4701
4702 static gboolean
4703 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4704 {
4705         MonoJitInfo **dest = (MonoJitInfo **)data;
4706         *dest = frame->ji;
4707         return TRUE;
4708 }
4709
4710 static MonoJitInfo*
4711 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4712 {
4713         MonoJitInfo *ji = NULL;
4714         if (!info)
4715                 return NULL;
4716
4717         /*
4718          * The suspended thread might be holding runtime locks. Make sure we don't try taking
4719          * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4720          * where we hold runtime locks.
4721          */
4722         if (!mono_threads_is_coop_enabled ())
4723                 mono_thread_info_set_is_async_context (TRUE);
4724         mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4725         if (!mono_threads_is_coop_enabled ())
4726                 mono_thread_info_set_is_async_context (FALSE);
4727         return ji;
4728 }
4729
4730 typedef struct {
4731         MonoInternalThread *thread;
4732         gboolean install_async_abort;
4733         MonoThreadInfoInterruptToken *interrupt_token;
4734 } AbortThreadData;
4735
4736 static SuspendThreadResult
4737 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4738 {
4739         AbortThreadData *data = (AbortThreadData *)ud;
4740         MonoInternalThread *thread = data->thread;
4741         MonoJitInfo *ji = NULL;
4742         gboolean protected_wrapper;
4743         gboolean running_managed;
4744
4745         if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4746                 return MonoResumeThread;
4747
4748         /*
4749         The target thread is running at least one protected block, which must not be interrupted, so we give up.
4750         The protected block code will give them a chance when appropriate.
4751         */
4752         if (thread->abort_protected_block_count)
4753                 return MonoResumeThread;
4754
4755         /*someone is already interrupting it*/
4756         if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 1)
4757                 return MonoResumeThread;
4758
4759         InterlockedIncrement (&thread_interruption_requested);
4760
4761         ji = mono_thread_info_get_last_managed (info);
4762         protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4763         running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4764
4765         if (!protected_wrapper && running_managed) {
4766                 /*We are in managed code*/
4767                 /*Set the thread to call */
4768                 if (data->install_async_abort)
4769                         mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4770                 return MonoResumeThread;
4771         } else {
4772                 /*
4773                  * This will cause waits to be broken.
4774                  * It will also prevent the thread from entering a wait, so if the thread returns
4775                  * from the wait before it receives the abort signal, it will just spin in the wait
4776                  * functions in the io-layer until the signal handler calls QueueUserAPC which will
4777                  * make it return.
4778                  */
4779                 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4780
4781                 return MonoResumeThread;
4782         }
4783 }
4784
4785 static void
4786 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4787 {
4788         AbortThreadData data;
4789
4790         g_assert (thread != mono_thread_internal_current ());
4791
4792         data.thread = thread;
4793         data.install_async_abort = install_async_abort;
4794         data.interrupt_token = NULL;
4795
4796         mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4797         if (data.interrupt_token)
4798                 mono_thread_info_finish_interrupt (data.interrupt_token);
4799         /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4800 }
4801
4802 static void
4803 self_abort_internal (MonoError *error)
4804 {
4805         MonoException *exc;
4806
4807         mono_error_init (error);
4808
4809         /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4810          * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4811
4812         /*
4813         Self aborts ignore the protected block logic and raise the TAE regardless. This is verified by one of the tests in mono/tests/abort-cctor.cs.
4814         */
4815         exc = mono_thread_request_interruption (TRUE);
4816         if (exc)
4817                 mono_error_set_exception_instance (error, exc);
4818         else
4819                 mono_thread_info_self_interrupt ();
4820 }
4821
4822 typedef struct {
4823         MonoInternalThread *thread;
4824         gboolean interrupt;
4825         MonoThreadInfoInterruptToken *interrupt_token;
4826 } SuspendThreadData;
4827
4828 static SuspendThreadResult
4829 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4830 {
4831         SuspendThreadData *data = (SuspendThreadData *)ud;
4832         MonoInternalThread *thread = data->thread;
4833         MonoJitInfo *ji = NULL;
4834         gboolean protected_wrapper;
4835         gboolean running_managed;
4836
4837         ji = mono_thread_info_get_last_managed (info);
4838         protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4839         running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4840
4841         if (running_managed && !protected_wrapper) {
4842                 thread->state &= ~ThreadState_SuspendRequested;
4843                 thread->state |= ThreadState_Suspended;
4844                 return KeepSuspended;
4845         } else {
4846                 if (InterlockedCompareExchange (&thread->interruption_requested, 1, 0) == 0)
4847                         InterlockedIncrement (&thread_interruption_requested);
4848                 if (data->interrupt)
4849                         data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4850
4851                 return MonoResumeThread;
4852         }
4853 }
4854
4855 /* LOCKING: called with @thread synch_cs held, and releases it */
4856 static void
4857 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4858 {
4859         SuspendThreadData data;
4860
4861         g_assert (thread != mono_thread_internal_current ());
4862
4863         data.thread = thread;
4864         data.interrupt = interrupt;
4865         data.interrupt_token = NULL;
4866
4867         mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4868         if (data.interrupt_token)
4869                 mono_thread_info_finish_interrupt (data.interrupt_token);
4870
4871         UNLOCK_THREAD (thread);
4872 }
4873
4874 /* LOCKING: called with @thread synch_cs held, and releases it */
4875 static void
4876 self_suspend_internal (void)
4877 {
4878         MonoInternalThread *thread;
4879
4880         thread = mono_thread_internal_current ();
4881
4882         mono_thread_info_begin_self_suspend ();
4883         thread->state &= ~ThreadState_SuspendRequested;
4884         thread->state |= ThreadState_Suspended;
4885
4886         UNLOCK_THREAD (thread);
4887
4888         mono_thread_info_end_self_suspend ();
4889 }
4890
4891 /*
4892  * mono_thread_is_foreign:
4893  * @thread: the thread to query
4894  *
4895  * This function allows one to determine if a thread was created by the mono runtime and has
4896  * a well defined lifecycle or it's a foreigh one, created by the native environment.
4897  *
4898  * Returns: TRUE if @thread was not created by the runtime.
4899  */
4900 mono_bool
4901 mono_thread_is_foreign (MonoThread *thread)
4902 {
4903         MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4904         return info->runtime_thread == FALSE;
4905 }
4906
4907 /*
4908  * mono_add_joinable_thread:
4909  *
4910  *   Add TID to the list of joinable threads.
4911  * LOCKING: Acquires the threads lock.
4912  */
4913 void
4914 mono_threads_add_joinable_thread (gpointer tid)
4915 {
4916 #ifndef HOST_WIN32
4917         /*
4918          * We cannot detach from threads because it causes problems like
4919          * 2fd16f60/r114307. So we collect them and join them when
4920          * we have time (in he finalizer thread).
4921          */
4922         joinable_threads_lock ();
4923         if (!joinable_threads)
4924                 joinable_threads = g_hash_table_new (NULL, NULL);
4925         g_hash_table_insert (joinable_threads, tid, tid);
4926         joinable_thread_count ++;
4927         joinable_threads_unlock ();
4928
4929         mono_gc_finalize_notify ();
4930 #endif
4931 }
4932
4933 /*
4934  * mono_threads_join_threads:
4935  *
4936  *   Join all joinable threads. This is called from the finalizer thread.
4937  * LOCKING: Acquires the threads lock.
4938  */
4939 void
4940 mono_threads_join_threads (void)
4941 {
4942 #ifndef HOST_WIN32
4943         GHashTableIter iter;
4944         gpointer key;
4945         gpointer tid;
4946         pthread_t thread;
4947         gboolean found;
4948
4949         /* Fastpath */
4950         if (!joinable_thread_count)
4951                 return;
4952
4953         while (TRUE) {
4954                 joinable_threads_lock ();
4955                 found = FALSE;
4956                 if (g_hash_table_size (joinable_threads)) {
4957                         g_hash_table_iter_init (&iter, joinable_threads);
4958                         g_hash_table_iter_next (&iter, &key, (void**)&tid);
4959                         thread = (pthread_t)tid;
4960                         g_hash_table_remove (joinable_threads, key);
4961                         joinable_thread_count --;
4962                         found = TRUE;
4963                 }
4964                 joinable_threads_unlock ();
4965                 if (found) {
4966                         if (thread != pthread_self ()) {
4967                                 MONO_ENTER_GC_SAFE;
4968                                 /* This shouldn't block */
4969                                 pthread_join (thread, NULL);
4970                                 MONO_EXIT_GC_SAFE;
4971                         }
4972                 } else {
4973                         break;
4974                 }
4975         }
4976 #endif
4977 }
4978
4979 /*
4980  * mono_thread_join:
4981  *
4982  *   Wait for thread TID to exit.
4983  * LOCKING: Acquires the threads lock.
4984  */
4985 void
4986 mono_thread_join (gpointer tid)
4987 {
4988 #ifndef HOST_WIN32
4989         pthread_t thread;
4990         gboolean found = FALSE;
4991
4992         joinable_threads_lock ();
4993         if (!joinable_threads)
4994                 joinable_threads = g_hash_table_new (NULL, NULL);
4995         if (g_hash_table_lookup (joinable_threads, tid)) {
4996                 g_hash_table_remove (joinable_threads, tid);
4997                 joinable_thread_count --;
4998                 found = TRUE;
4999         }
5000         joinable_threads_unlock ();
5001         if (!found)
5002                 return;
5003         thread = (pthread_t)tid;
5004         MONO_ENTER_GC_SAFE;
5005         pthread_join (thread, NULL);
5006         MONO_EXIT_GC_SAFE;
5007 #endif
5008 }
5009
5010 void
5011 mono_thread_internal_check_for_interruption_critical (MonoInternalThread *thread)
5012 {
5013         if ((thread->state & (ThreadState_StopRequested | ThreadState_SuspendRequested)) != 0)
5014                 mono_thread_interruption_checkpoint ();
5015 }
5016
5017 void
5018 mono_thread_internal_unhandled_exception (MonoObject* exc)
5019 {
5020         MonoClass *klass = exc->vtable->klass;
5021         if (is_threadabort_exception (klass)) {
5022                 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5023         } else if (!is_appdomainunloaded_exception (klass)
5024                 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5025                 mono_unhandled_exception (exc);
5026                 if (mono_environment_exitcode_get () == 1) {
5027                         mono_environment_exitcode_set (255);
5028                         mono_invoke_unhandled_exception_hook (exc);
5029                         g_assert_not_reached ();
5030                 }
5031         }
5032 }
5033
5034 void
5035 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5036 {
5037         MonoError error;
5038         mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5039         mono_error_set_pending_exception (&error);
5040 }
5041
5042 /*
5043  * mono_threads_attach_coop: called by native->managed wrappers
5044  *
5045  * In non-coop mode:
5046  *  - @dummy: is NULL
5047  *  - @return: the original domain which needs to be restored, or NULL.
5048  *
5049  * In coop mode:
5050  *  - @dummy: contains the original domain
5051  *  - @return: a cookie containing current MonoThreadInfo*.
5052  */
5053 gpointer
5054 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5055 {
5056         MonoDomain *orig;
5057         gboolean fresh_thread = FALSE;
5058
5059         if (!domain) {
5060                 /* Happens when called from AOTed code which is only used in the root domain. */
5061                 domain = mono_get_root_domain ();
5062         }
5063
5064         g_assert (domain);
5065
5066         /* On coop, when we detached, we moved the thread from  RUNNING->BLOCKING.
5067          * If we try to reattach we do a BLOCKING->RUNNING transition.  If the thread
5068          * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5069          * we're only responsible for making the cookie. */
5070         if (mono_threads_is_coop_enabled ()) {
5071                 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5072                 fresh_thread = !info || !mono_thread_info_is_live (info);
5073         }
5074
5075         if (!mono_thread_internal_current ()) {
5076                 mono_thread_attach_full (domain, FALSE);
5077
5078                 // #678164
5079                 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5080         }
5081
5082         orig = mono_domain_get ();
5083         if (orig != domain)
5084                 mono_domain_set (domain, TRUE);
5085
5086         if (!mono_threads_is_coop_enabled ())
5087                 return orig != domain ? orig : NULL;
5088
5089         if (fresh_thread) {
5090                 *dummy = NULL;
5091                 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5092                  * return the right cookie. */
5093                 return mono_threads_enter_gc_unsafe_region_cookie ();
5094         } else {
5095                 *dummy = orig;
5096                 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5097                 return mono_threads_enter_gc_unsafe_region (dummy);
5098         }
5099 }
5100
5101 /*
5102  * mono_threads_detach_coop: called by native->managed wrappers
5103  *
5104  * In non-coop mode:
5105  *  - @cookie: the original domain which needs to be restored, or NULL.
5106  *  - @dummy: is NULL
5107  *
5108  * In coop mode:
5109  *  - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5110  *  - @dummy: contains the original domain
5111  */
5112 void
5113 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5114 {
5115         MonoDomain *domain, *orig;
5116
5117         if (!mono_threads_is_coop_enabled ()) {
5118                 orig = (MonoDomain*) cookie;
5119                 if (orig)
5120                         mono_domain_set (orig, TRUE);
5121         } else {
5122                 orig = (MonoDomain*) *dummy;
5123
5124                 domain = mono_domain_get ();
5125                 g_assert (domain);
5126
5127                 /* it won't do anything if cookie is NULL
5128                  * thread state RUNNING -> (RUNNING|BLOCKING) */
5129                 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5130
5131                 if (orig != domain) {
5132                         if (!orig)
5133                                 mono_domain_unset ();
5134                         else
5135                                 mono_domain_set (orig, TRUE);
5136                 }
5137         }
5138 }
5139
5140 void
5141 mono_threads_begin_abort_protected_block (void)
5142 {
5143         MonoInternalThread *thread;
5144
5145         thread = mono_thread_internal_current ();
5146         ++thread->abort_protected_block_count;
5147         mono_memory_barrier ();
5148 }
5149
5150 void
5151 mono_threads_end_abort_protected_block (void)
5152 {
5153         MonoInternalThread *thread;
5154
5155         thread = mono_thread_internal_current ();
5156
5157         mono_memory_barrier ();
5158         --thread->abort_protected_block_count;
5159 }
5160
5161 MonoException*
5162 mono_thread_try_resume_interruption (void)
5163 {
5164         MonoInternalThread *thread;
5165
5166         thread = mono_thread_internal_current ();
5167         if (thread->abort_protected_block_count || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ())
5168                 return NULL;
5169
5170         return mono_thread_resume_interruption ();
5171 }