3 * Thread support internal calls
6 * Dick Porter (dick@ximian.com)
7 * Paolo Molaro (lupus@ximian.com)
8 * Patrik Torstensson (patrik.torstensson@labs2.com)
10 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
11 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
12 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
13 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
21 #include <mono/metadata/object.h>
22 #include <mono/metadata/domain-internals.h>
23 #include <mono/metadata/profiler-private.h>
24 #include <mono/metadata/threads.h>
25 #include <mono/metadata/threads-types.h>
26 #include <mono/metadata/exception.h>
27 #include <mono/metadata/environment.h>
28 #include <mono/metadata/monitor.h>
29 #include <mono/metadata/gc-internals.h>
30 #include <mono/metadata/marshal.h>
31 #include <mono/metadata/runtime.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/debug-internals.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-error-internals.h>
46 #include <mono/utils/os-event.h>
47 #include <mono/utils/mono-threads-debug.h>
48 #include <mono/metadata/w32handle.h>
49 #include <mono/metadata/w32event.h>
50 #include <mono/metadata/w32mutex.h>
52 #include <mono/metadata/reflection-internals.h>
53 #include <mono/metadata/abi-details.h>
54 #include <mono/metadata/w32error.h>
55 #include <mono/utils/w32api.h>
61 #if defined(HOST_WIN32)
65 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
66 #define USE_TKILL_ON_ANDROID 1
69 #ifdef PLATFORM_ANDROID
72 #ifdef USE_TKILL_ON_ANDROID
73 extern int tkill (pid_t tid, int signal);
77 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
78 #define THREAD_DEBUG(a)
79 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
80 #define THREAD_WAIT_DEBUG(a)
81 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
82 #define LIBGC_DEBUG(a)
84 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
85 #define SPIN_LOCK(i) do { \
86 if (SPIN_TRYLOCK (i)) \
90 #define SPIN_UNLOCK(i) i = 0
92 #define LOCK_THREAD(thread) lock_thread((thread))
93 #define UNLOCK_THREAD(thread) unlock_thread((thread))
105 typedef struct _StaticDataFreeList StaticDataFreeList;
106 struct _StaticDataFreeList {
107 StaticDataFreeList *next;
115 StaticDataFreeList *freelist;
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;
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;
128 /* Holds current status of static data heap */
129 static StaticDataInfo thread_static_info;
130 static StaticDataInfo context_static_info;
132 /* The hash of existing threads (key is thread ID, value is
133 * MonoInternalThread*) that need joining before exit
135 static MonoGHashTable *threads=NULL;
137 /* List of app context GC handles.
138 * Added to from mono_threads_register_app_context ().
140 static GHashTable *contexts = NULL;
142 /* Cleanup queue for contexts. */
143 static MonoReferenceQueue *context_queue;
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 ().
150 static MonoGHashTable *threads_starting_up = NULL;
153 /* Protected by the threads lock */
154 static GHashTable *joinable_threads;
155 static int joinable_thread_count;
157 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
158 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
160 /* function called at thread start */
161 static MonoThreadStartCB mono_thread_start_cb = NULL;
163 /* function called at thread attach */
164 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
166 /* function called at thread cleanup */
167 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
169 /* The default stack size for each thread */
170 static guint32 default_stacksize = 0;
171 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
173 static void context_adjust_static_data (MonoAppContext *ctx);
174 static void mono_free_static_data (gpointer* static_data);
175 static void mono_init_static_data_info (StaticDataInfo *static_data);
176 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
177 static gboolean mono_thread_resume (MonoInternalThread* thread);
178 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
179 static void self_abort_internal (MonoError *error);
180 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
181 static void self_suspend_internal (void);
183 static MonoException* mono_thread_execute_interruption (void);
184 static void ref_stack_destroy (gpointer rs);
186 /* Spin lock for InterlockedXXX 64 bit functions */
187 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
188 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
189 static mono_mutex_t interlocked_mutex;
191 /* global count of thread interruptions requested */
192 static gint32 thread_interruption_requested = 0;
194 /* Event signaled when a thread changes its background mode */
195 static MonoOSEvent background_change_event;
197 static gboolean shutting_down = FALSE;
199 static gint32 managed_thread_id_counter = 0;
201 /* Class lazy loading functions */
202 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, "System", "AppDomainUnloadedException")
205 mono_threads_lock (void)
207 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
211 mono_threads_unlock (void)
213 mono_locks_coop_release (&threads_mutex, ThreadsLock);
218 get_next_managed_thread_id (void)
220 return InterlockedIncrement (&managed_thread_id_counter);
224 * We separate interruptions/exceptions into either sync (they can be processed anytime,
225 * normally as soon as they are set, and are set by the same thread) and async (they can't
226 * be processed inside abort protected blocks and are normally set by other threads). We
227 * can have both a pending sync and async interruption. In this case, the sync exception is
228 * processed first. Since we clean sync flag first, mono_thread_execute_interruption must
229 * also handle all sync type exceptions before the async type exceptions.
232 INTERRUPT_SYNC_REQUESTED_BIT = 0x1,
233 INTERRUPT_ASYNC_REQUESTED_BIT = 0x2,
234 INTERRUPT_REQUESTED_MASK = 0x3,
235 ABORT_PROT_BLOCK_SHIFT = 2,
236 ABORT_PROT_BLOCK_BITS = 8,
237 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
241 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
243 gsize state = thread->thread_state;
244 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
248 mono_threads_begin_abort_protected_block (void)
250 MonoInternalThread *thread = mono_thread_internal_current ();
251 gsize old_state, new_state;
254 old_state = thread->thread_state;
256 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
257 //bounds check abort_prot_count
258 g_assert (new_val > 0);
259 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
261 new_state = old_state + (1 << ABORT_PROT_BLOCK_SHIFT);
262 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
264 /* Defer async request since we won't be able to process until exiting the block */
265 if (new_val == 1 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
266 InterlockedDecrement (&thread_interruption_requested);
267 THREADS_INTERRUPT_DEBUG ("[%d] begin abort protected block old_state %ld new_state %ld, defer tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
268 if (thread_interruption_requested < 0)
269 g_warning ("bad thread_interruption_requested state");
271 THREADS_INTERRUPT_DEBUG ("[%d] begin abort protected block old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
276 mono_thread_state_has_interruption (gsize state)
278 /* pending exception, self abort */
279 if (state & INTERRUPT_SYNC_REQUESTED_BIT)
282 /* abort, interruption, suspend */
283 if ((state & INTERRUPT_ASYNC_REQUESTED_BIT) && !(state & ABORT_PROT_BLOCK_MASK))
290 mono_threads_end_abort_protected_block (void)
292 MonoInternalThread *thread = mono_thread_internal_current ();
293 gsize old_state, new_state;
296 old_state = thread->thread_state;
298 //bounds check abort_prot_count
299 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
300 g_assert (new_val >= 0);
301 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
303 new_state = old_state - (1 << ABORT_PROT_BLOCK_SHIFT);
304 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
306 if (new_val == 0 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
307 InterlockedIncrement (&thread_interruption_requested);
308 THREADS_INTERRUPT_DEBUG ("[%d] end abort protected block old_state %ld new_state %ld, restore tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
310 THREADS_INTERRUPT_DEBUG ("[%d] end abort protected block old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
313 return mono_thread_state_has_interruption (new_state);
317 mono_thread_get_interruption_requested (MonoInternalThread *thread)
319 gsize state = thread->thread_state;
321 return mono_thread_state_has_interruption (state);
325 * Returns TRUE is there was a state change
326 * We clear a single interruption request, sync has priority.
329 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
331 gsize old_state, new_state;
333 old_state = thread->thread_state;
335 // no interruption to process
336 if (!(old_state & INTERRUPT_SYNC_REQUESTED_BIT) &&
337 (!(old_state & INTERRUPT_ASYNC_REQUESTED_BIT) || (old_state & ABORT_PROT_BLOCK_MASK)))
340 if (old_state & INTERRUPT_SYNC_REQUESTED_BIT)
341 new_state = old_state & ~INTERRUPT_SYNC_REQUESTED_BIT;
343 new_state = old_state & ~INTERRUPT_ASYNC_REQUESTED_BIT;
344 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
346 InterlockedDecrement (&thread_interruption_requested);
347 THREADS_INTERRUPT_DEBUG ("[%d] clear interruption old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
348 if (thread_interruption_requested < 0)
349 g_warning ("bad thread_interruption_requested state");
353 /* Returns TRUE is there was a state change and the interruption can be processed */
355 mono_thread_set_interruption_requested (MonoInternalThread *thread)
357 //always force when the current thread is doing it to itself.
358 gboolean sync = thread == mono_thread_internal_current ();
359 gsize old_state, new_state;
361 old_state = thread->thread_state;
364 if ((sync && (old_state & INTERRUPT_SYNC_REQUESTED_BIT)) ||
365 (!sync && (old_state & INTERRUPT_ASYNC_REQUESTED_BIT)))
369 new_state = old_state | INTERRUPT_SYNC_REQUESTED_BIT;
371 new_state = old_state | INTERRUPT_ASYNC_REQUESTED_BIT;
372 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
374 if (sync || !(new_state & ABORT_PROT_BLOCK_MASK)) {
375 InterlockedIncrement (&thread_interruption_requested);
376 THREADS_INTERRUPT_DEBUG ("[%d] set interruption on [%d] old_state %ld new_state %ld, tir %d\n", mono_thread_internal_current ()->small_id, thread->small_id, old_state, new_state, thread_interruption_requested);
378 THREADS_INTERRUPT_DEBUG ("[%d] set interruption on [%d] old_state %ld new_state %ld, tir deferred %d\n", mono_thread_internal_current ()->small_id, thread->small_id, old_state, new_state, thread_interruption_requested);
381 return sync || !(new_state & ABORT_PROT_BLOCK_MASK);
384 static inline MonoNativeThreadId
385 thread_get_tid (MonoInternalThread *thread)
387 /* We store the tid as a guint64 to keep the object layout constant between platforms */
388 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
391 static void ensure_synch_cs_set (MonoInternalThread *thread)
393 MonoCoopMutex *synch_cs;
395 if (thread->synch_cs != NULL) {
399 synch_cs = g_new0 (MonoCoopMutex, 1);
400 mono_coop_mutex_init_recursive (synch_cs);
402 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
403 synch_cs, NULL) != NULL) {
404 /* Another thread must have installed this CS */
405 mono_coop_mutex_destroy (synch_cs);
411 lock_thread (MonoInternalThread *thread)
413 if (!thread->synch_cs)
414 ensure_synch_cs_set (thread);
416 g_assert (thread->synch_cs);
418 mono_coop_mutex_lock (thread->synch_cs);
422 unlock_thread (MonoInternalThread *thread)
424 mono_coop_mutex_unlock (thread->synch_cs);
427 static inline gboolean
428 is_appdomainunloaded_exception (MonoClass *klass)
430 return klass == mono_class_get_appdomain_unloaded_exception_class ();
433 static inline gboolean
434 is_threadabort_exception (MonoClass *klass)
436 return klass == mono_defaults.threadabortexception_class;
440 * A special static data offset (guint32) consists of 3 parts:
442 * [0] 6-bit index into the array of chunks.
443 * [6] 25-bit offset into the array.
444 * [31] Bit indicating thread or context static.
449 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
460 } SpecialStaticOffset;
462 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
463 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
465 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
466 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
467 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
468 (((SpecialStaticOffset *) &(x))->fields.f)
471 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
473 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
475 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
476 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
478 return ((char *) thread->static_data [idx]) + off;
482 get_context_static_data (MonoAppContext *ctx, guint32 offset)
484 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
486 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
487 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
489 return ((char *) ctx->static_data [idx]) + off;
493 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
495 static MonoClassField *current_thread_field = NULL;
499 if (!current_thread_field) {
500 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
501 g_assert (current_thread_field);
504 mono_class_vtable (domain, mono_defaults.thread_class);
505 mono_domain_lock (domain);
506 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
507 mono_domain_unlock (domain);
510 return (MonoThread **)get_thread_static_data (thread, offset);
514 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
516 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
518 g_assert (current->obj.vtable->domain == domain);
520 g_assert (!*current_thread_ptr);
521 *current_thread_ptr = current;
525 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
531 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
534 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
535 /* only possible failure mode is OOM, from which we don't expect to recover. */
536 mono_error_assert_ok (&error);
538 MONO_OBJECT_SETREF (thread, internal_thread, internal);
543 static MonoInternalThread*
544 create_internal_thread_object (void)
547 MonoInternalThread *thread;
550 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
551 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
552 /* only possible failure mode is OOM, from which we don't exect to recover */
553 mono_error_assert_ok (&error);
555 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
556 mono_coop_mutex_init_recursive (thread->synch_cs);
558 thread->apartment_state = ThreadApartmentState_Unknown;
559 thread->managed_id = get_next_managed_thread_id ();
560 if (mono_gc_is_moving ()) {
561 thread->thread_pinning_ref = thread;
562 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
565 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
567 thread->suspended = g_new0 (MonoOSEvent, 1);
568 mono_os_event_init (thread->suspended, TRUE);
574 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
578 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
579 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
580 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
585 g_assert (internal->native_handle);
587 res = SetThreadPriority (internal->native_handle, priority - 2);
589 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
590 #else /* HOST_WIN32 */
593 struct sched_param param;
596 tid = thread_get_tid (internal);
598 res = pthread_getschedparam (tid, &policy, ¶m);
600 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
602 #ifdef _POSIX_PRIORITY_SCHEDULING
605 /* Necessary to get valid priority range */
607 min = sched_get_priority_min (policy);
608 max = sched_get_priority_max (policy);
610 if (max > 0 && min >= 0 && max > min) {
611 double srange, drange, sposition, dposition;
612 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
614 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
615 dposition = (sposition / srange) * drange;
616 param.sched_priority = (int)(dposition + min);
623 param.sched_priority = 50;
629 param.sched_priority = 0;
632 g_warning ("%s: unknown policy %d", __func__, policy);
637 res = pthread_setschedparam (tid, policy, ¶m);
640 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
643 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
645 #endif /* HOST_WIN32 */
649 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
652 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain)
654 MonoThreadInfo *info;
655 MonoInternalThread *internal;
656 MonoDomain *domain, *root_domain;
660 info = mono_thread_info_current ();
663 internal = thread->internal_thread;
666 /* It is needed to store the MonoInternalThread on the MonoThreadInfo, because of the following case:
667 * - the MonoInternalThread TLS key is destroyed: set it to NULL
668 * - the MonoThreadInfo TLS key is destroyed: calls mono_thread_info_detach
669 * - it calls MonoThreadInfoCallbacks.thread_detach
670 * - mono_thread_internal_current returns NULL -> fails to detach the MonoInternalThread. */
671 mono_thread_info_set_internal_thread_gchandle (info, mono_gchandle_new ((MonoObject*) internal, FALSE));
673 internal->handle = mono_threads_open_thread_handle (info->handle);
675 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
677 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
678 internal->thread_info = info;
679 internal->small_id = info->small_id;
681 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
683 SET_CURRENT_OBJECT (internal);
685 domain = mono_object_domain (thread);
687 mono_thread_push_appdomain_ref (domain);
688 if (!mono_domain_set (domain, force_domain)) {
689 mono_thread_pop_appdomain_ref ();
693 mono_threads_lock ();
695 if (threads_starting_up)
696 mono_g_hash_table_remove (threads_starting_up, thread);
698 if (shutting_down && !force_attach) {
699 mono_threads_unlock ();
700 mono_thread_pop_appdomain_ref ();
705 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
708 /* We don't need to duplicate thread->handle, because it is
709 * only closed when the thread object is finalized by the GC. */
710 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
712 /* We have to do this here because mono_thread_start_cb
713 * requires that root_domain_thread is set up. */
714 if (thread_static_info.offset || thread_static_info.idx > 0) {
715 /* get the current allocated size */
716 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
717 mono_alloc_static_data (&internal->static_data, offset, TRUE);
720 mono_threads_unlock ();
722 root_domain = mono_get_root_domain ();
724 g_assert (!internal->root_domain_thread);
725 if (domain != root_domain)
726 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
728 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
730 if (domain != root_domain)
731 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
733 set_current_thread_for_domain (domain, internal, thread);
735 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
741 mono_thread_detach_internal (MonoInternalThread *thread)
745 g_assert (thread != NULL);
746 SET_CURRENT_OBJECT (thread);
748 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
751 mono_w32mutex_abandon ();
754 if (thread->abort_state_handle) {
755 mono_gchandle_free (thread->abort_state_handle);
756 thread->abort_state_handle = 0;
759 thread->abort_exc = NULL;
760 thread->current_appcontext = NULL;
763 * thread->synch_cs can be NULL if this was called after
764 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
765 * This can happen only during shutdown.
766 * The shutting_down flag is not always set, so we can't assert on it.
768 if (thread->synch_cs)
769 LOCK_THREAD (thread);
771 thread->state |= ThreadState_Stopped;
772 thread->state &= ~ThreadState_Background;
774 if (thread->synch_cs)
775 UNLOCK_THREAD (thread);
778 An interruption request has leaked to cleanup. Adjust the global counter.
780 This can happen is the abort source thread finds the abortee (this) thread
781 in unmanaged code. If this thread never trips back to managed code or check
782 the local flag it will be left set and positively unbalance the global counter.
784 Leaving the counter unbalanced will cause a performance degradation since all threads
785 will now keep checking their local flags all the time.
787 mono_thread_clear_interruption_requested (thread);
789 mono_threads_lock ();
793 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
794 /* We have to check whether the thread object for the
795 * tid is still the same in the table because the
796 * thread might have been destroyed and the tid reused
797 * in the meantime, in which case the tid would be in
798 * the table, but with another thread object.
802 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
806 mono_threads_unlock ();
808 /* Don't close the handle here, wait for the object finalizer
809 * to do it. Otherwise, the following race condition applies:
811 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
813 * 2) Some other handle is reassigned the same slot
815 * 3) Another thread tries to join the first thread, and
816 * blocks waiting for the reassigned handle to be signalled
817 * (which might never happen). This is possible, because the
818 * thread calling Join() still has a reference to the first
822 /* if the thread is not in the hash it has been removed already */
824 mono_domain_unset ();
825 mono_memory_barrier ();
827 if (mono_thread_cleanup_fn)
828 mono_thread_cleanup_fn (thread_get_tid (thread));
833 mono_release_type_locks (thread);
835 /* Can happen when we attach the profiler helper thread in order to heapshot. */
836 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
837 MONO_PROFILER_RAISE (thread_stopped, (thread->tid));
839 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
842 * This will signal async signal handlers that the thread has exited.
843 * The profiler callback needs this to be set, so it cannot be done earlier.
845 mono_domain_unset ();
846 mono_memory_barrier ();
848 if (thread == mono_thread_internal_current ())
849 mono_thread_pop_appdomain_ref ();
851 mono_free_static_data (thread->static_data);
852 thread->static_data = NULL;
853 ref_stack_destroy (thread->appdomain_refs);
854 thread->appdomain_refs = NULL;
856 g_assert (thread->suspended);
857 mono_os_event_destroy (thread->suspended);
858 g_free (thread->suspended);
859 thread->suspended = NULL;
861 if (mono_thread_cleanup_fn)
862 mono_thread_cleanup_fn (thread_get_tid (thread));
864 mono_memory_barrier ();
866 if (mono_gc_is_moving ()) {
867 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
868 thread->thread_pinning_ref = NULL;
872 SET_CURRENT_OBJECT (NULL);
873 mono_domain_unset ();
875 mono_thread_info_unset_internal_thread_gchandle ((MonoThreadInfo*) thread->thread_info);
877 /* Don't need to close the handle to this thread, even though we took a
878 * reference in mono_thread_attach (), because the GC will do it
879 * when the Thread object is finalised.
886 MonoObject *start_delegate;
887 MonoObject *start_delegate_arg;
888 MonoThreadStart start_func;
889 gpointer start_func_arg;
890 gboolean force_attach;
892 MonoCoopSem registered;
895 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
898 MonoThreadStart start_func;
899 void *start_func_arg;
902 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
906 MonoInternalThread *internal;
907 MonoObject *start_delegate;
908 MonoObject *start_delegate_arg;
911 thread = start_info->thread;
912 internal = thread->internal_thread;
913 domain = mono_object_domain (start_info->thread);
915 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
917 if (!mono_thread_attach_internal (thread, start_info->force_attach, FALSE)) {
918 start_info->failed = TRUE;
920 mono_coop_sem_post (&start_info->registered);
922 if (InterlockedDecrement (&start_info->ref) == 0) {
923 mono_coop_sem_destroy (&start_info->registered);
930 mono_thread_internal_set_priority (internal, internal->priority);
934 start_delegate = start_info->start_delegate;
935 start_delegate_arg = start_info->start_delegate_arg;
936 start_func = start_info->start_func;
937 start_func_arg = start_info->start_func_arg;
939 /* This MUST be called before any managed code can be
940 * executed, as it calls the callback function that (for the
941 * jit) sets the lmf marker.
944 if (mono_thread_start_cb)
945 mono_thread_start_cb (tid, stack_ptr, start_func);
947 /* On 2.0 profile (and higher), set explicitly since state might have been
949 if (internal->apartment_state == ThreadApartmentState_Unknown)
950 internal->apartment_state = ThreadApartmentState_MTA;
952 mono_thread_init_apartment_state ();
954 /* Let the thread that called Start() know we're ready */
955 mono_coop_sem_post (&start_info->registered);
957 if (InterlockedDecrement (&start_info->ref) == 0) {
958 mono_coop_sem_destroy (&start_info->registered);
962 /* start_info is not valid anymore */
966 * Call this after calling start_notify, since the profiler callback might want
967 * to lock the thread, and the lock is held by thread_start () which waits for
970 MONO_PROFILER_RAISE (thread_started, (tid));
972 /* if the name was set before starting, we didn't invoke the profiler callback */
973 if (internal->name) {
974 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
975 MONO_PROFILER_RAISE (thread_name, (internal->tid, tname));
976 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
980 /* start_func is set only for unmanaged start functions */
982 start_func (start_func_arg);
986 g_assert (start_delegate != NULL);
988 /* we may want to handle the exception here. See comment below on unhandled exceptions */
989 args [0] = (gpointer) start_delegate_arg;
990 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
992 if (!mono_error_ok (&error)) {
993 MonoException *ex = mono_error_convert_to_exception (&error);
995 g_assert (ex != NULL);
996 MonoClass *klass = mono_object_get_class (&ex->object);
997 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
998 !is_threadabort_exception (klass)) {
999 mono_unhandled_exception (&ex->object);
1000 mono_invoke_unhandled_exception_hook (&ex->object);
1001 g_assert_not_reached ();
1004 mono_error_cleanup (&error);
1008 /* If the thread calls ExitThread at all, this remaining code
1009 * will not be executed, but the main thread will eventually
1010 * call mono_thread_detach_internal() on this thread's behalf.
1013 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
1015 /* Do any cleanup needed for apartment state. This
1016 * cannot be done in mono_thread_detach_internal since
1017 * mono_thread_detach_internal could be called for a
1018 * thread other than the current thread.
1019 * mono_thread_cleanup_apartment_state cleans up apartment
1020 * for the current thead */
1021 mono_thread_cleanup_apartment_state ();
1023 mono_thread_detach_internal (internal);
1031 start_wrapper (gpointer data)
1033 StartInfo *start_info;
1034 MonoThreadInfo *info;
1037 start_info = (StartInfo*) data;
1038 g_assert (start_info);
1040 info = mono_thread_info_attach ();
1041 info->runtime_thread = TRUE;
1043 /* Run the actual main function of the thread */
1044 res = start_wrapper_internal (start_info, info->stack_end);
1046 mono_thread_info_exit (res);
1048 g_assert_not_reached ();
1054 * Common thread creation code.
1055 * LOCKING: Acquires the threads lock.
1058 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
1059 MonoThreadCreateFlags flags, MonoError *error)
1061 StartInfo *start_info = NULL;
1062 MonoNativeThreadId tid;
1064 gsize stack_set_size;
1067 g_assert (!start_func && !start_func_arg);
1069 g_assert (!start_delegate);
1071 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
1072 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
1073 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1075 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
1076 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
1077 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1081 * Join joinable threads to prevent running out of threads since the finalizer
1082 * thread might be blocked/backlogged.
1084 mono_threads_join_threads ();
1088 mono_threads_lock ();
1089 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
1090 mono_threads_unlock ();
1093 if (threads_starting_up == NULL) {
1094 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
1096 mono_g_hash_table_insert (threads_starting_up, thread, thread);
1097 mono_threads_unlock ();
1099 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
1100 if (internal->threadpool_thread)
1101 mono_thread_set_state (internal, ThreadState_Background);
1103 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
1105 start_info = g_new0 (StartInfo, 1);
1106 start_info->ref = 2;
1107 start_info->thread = thread;
1108 start_info->start_delegate = start_delegate;
1109 start_info->start_delegate_arg = thread->start_obj;
1110 start_info->start_func = start_func;
1111 start_info->start_func_arg = start_func_arg;
1112 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
1113 start_info->failed = FALSE;
1114 mono_coop_sem_init (&start_info->registered, 0);
1116 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
1117 stack_set_size = default_stacksize_for_thread (internal);
1121 if (!mono_thread_platform_create_thread (start_wrapper, start_info, &stack_set_size, &tid)) {
1122 /* The thread couldn't be created, so set an exception */
1123 mono_threads_lock ();
1124 mono_g_hash_table_remove (threads_starting_up, thread);
1125 mono_threads_unlock ();
1126 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
1127 /* ref is not going to be decremented in start_wrapper_internal */
1128 InterlockedDecrement (&start_info->ref);
1133 internal->stack_size = (int) stack_set_size;
1135 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
1138 * Wait for the thread to set up its TLS data etc, so
1139 * theres no potential race condition if someone tries
1140 * to look up the data believing the thread has
1144 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
1146 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));
1148 ret = !start_info->failed;
1151 if (InterlockedDecrement (&start_info->ref) == 0) {
1152 mono_coop_sem_destroy (&start_info->registered);
1153 g_free (start_info);
1160 * mono_thread_new_init:
1163 mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1165 if (mono_thread_start_cb) {
1166 mono_thread_start_cb (tid, stack_start, func);
1171 * mono_threads_set_default_stacksize:
1174 mono_threads_set_default_stacksize (guint32 stacksize)
1176 default_stacksize = stacksize;
1180 * mono_threads_get_default_stacksize:
1183 mono_threads_get_default_stacksize (void)
1185 return default_stacksize;
1189 * mono_thread_create_internal:
1191 * ARG should not be a GC reference.
1194 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1197 MonoInternalThread *internal;
1202 internal = create_internal_thread_object ();
1204 thread = create_thread_object (domain, internal);
1206 LOCK_THREAD (internal);
1208 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1210 UNLOCK_THREAD (internal);
1212 return_val_if_nok (error, NULL);
1217 * mono_thread_create:
1220 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1223 if (!mono_thread_create_checked (domain, func, arg, &error))
1224 mono_error_cleanup (&error);
1228 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1230 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1234 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1236 MonoInternalThread *internal;
1238 MonoThreadInfo *info;
1239 MonoNativeThreadId tid;
1241 if (mono_thread_internal_current_is_attached ()) {
1242 if (domain != mono_domain_get ())
1243 mono_domain_set (domain, TRUE);
1244 /* Already attached */
1245 return mono_thread_current ();
1248 info = mono_thread_info_attach ();
1251 tid=mono_native_thread_id_get ();
1253 internal = create_internal_thread_object ();
1255 thread = create_thread_object (domain, internal);
1257 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1258 /* Mono is shutting down, so just wait for the end */
1260 mono_thread_info_sleep (10000, NULL);
1263 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1265 if (mono_thread_attach_cb)
1266 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), info->stack_end);
1268 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1269 if (!mono_thread_info_current ()->tools_thread)
1270 MONO_PROFILER_RAISE (thread_started, (MONO_NATIVE_THREAD_ID_TO_UINT (tid)));
1276 * mono_thread_attach:
1279 mono_thread_attach (MonoDomain *domain)
1281 return mono_thread_attach_full (domain, FALSE);
1285 * mono_thread_detach:
1288 mono_thread_detach (MonoThread *thread)
1291 mono_thread_detach_internal (thread->internal_thread);
1295 * mono_thread_detach_if_exiting:
1297 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1298 * This should be used at the end of embedding code which calls into managed code, and which
1299 * can be called from pthread dtors, like <code>dealloc:</code> implementations in Objective-C.
1302 mono_thread_detach_if_exiting (void)
1304 if (mono_thread_info_is_exiting ()) {
1305 MonoInternalThread *thread;
1307 thread = mono_thread_internal_current ();
1309 mono_thread_detach_internal (thread);
1310 mono_thread_info_detach ();
1318 mono_thread_internal_current_is_attached (void)
1320 MonoInternalThread *internal;
1322 internal = GET_CURRENT_OBJECT ();
1333 mono_thread_exit (void)
1335 MonoInternalThread *thread = mono_thread_internal_current ();
1337 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1339 mono_thread_detach_internal (thread);
1341 /* we could add a callback here for embedders to use. */
1342 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1343 exit (mono_environment_exitcode_get ());
1345 mono_thread_info_exit (0);
1349 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1351 MonoInternalThread *internal;
1353 internal = create_internal_thread_object ();
1355 internal->state = ThreadState_Unstarted;
1357 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1361 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1363 return mono_thread_current ();
1367 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1371 MonoInternalThread *internal;
1374 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1376 if (!this_obj->internal_thread)
1377 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1378 internal = this_obj->internal_thread;
1380 LOCK_THREAD (internal);
1382 if ((internal->state & ThreadState_Unstarted) == 0) {
1383 UNLOCK_THREAD (internal);
1384 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1388 if ((internal->state & ThreadState_Aborted) != 0) {
1389 UNLOCK_THREAD (internal);
1393 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1395 mono_error_cleanup (&error);
1396 UNLOCK_THREAD (internal);
1400 internal->state &= ~ThreadState_Unstarted;
1402 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1404 UNLOCK_THREAD (internal);
1405 return internal->handle;
1409 * This is called from the finalizer of the internal thread object.
1412 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1414 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1417 * Since threads keep a reference to their thread object while running, by
1418 * the time this function is called, the thread has already exited/detached,
1419 * i.e. mono_thread_detach_internal () has ran. The exception is during
1420 * shutdown, when mono_thread_detach_internal () can be called after this.
1422 if (this_obj->handle) {
1423 mono_threads_close_thread_handle (this_obj->handle);
1424 this_obj->handle = NULL;
1428 CloseHandle (this_obj->native_handle);
1431 if (this_obj->synch_cs) {
1432 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1433 this_obj->synch_cs = NULL;
1434 mono_coop_mutex_destroy (synch_cs);
1438 if (this_obj->name) {
1439 void *name = this_obj->name;
1440 this_obj->name = NULL;
1446 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1449 MonoInternalThread *thread = mono_thread_internal_current ();
1451 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1453 if (mono_thread_current_check_pending_interrupt ())
1457 gboolean alerted = FALSE;
1459 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1461 res = mono_thread_info_sleep (ms, &alerted);
1463 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1466 MonoException* exc = mono_thread_execute_interruption ();
1468 mono_raise_exception (exc);
1470 // FIXME: !MONO_INFINITE_WAIT
1471 if (ms != MONO_INFINITE_WAIT)
1480 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1485 ves_icall_System_Threading_Thread_GetDomainID (void)
1487 return mono_domain_get()->domain_id;
1491 ves_icall_System_Threading_Thread_Yield (void)
1493 return mono_thread_info_yield ();
1497 * mono_thread_get_name:
1499 * Return the name of the thread. NAME_LEN is set to the length of the name.
1500 * Return NULL if the thread has no name. The returned memory is owned by the
1504 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1508 LOCK_THREAD (this_obj);
1510 if (!this_obj->name) {
1514 *name_len = this_obj->name_len;
1515 res = g_new (gunichar2, this_obj->name_len);
1516 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1519 UNLOCK_THREAD (this_obj);
1525 * mono_thread_get_name_utf8:
1526 * \returns the name of the thread in UTF-8.
1527 * Return NULL if the thread has no name.
1528 * The returned memory is owned by the caller.
1531 mono_thread_get_name_utf8 (MonoThread *thread)
1536 MonoInternalThread *internal = thread->internal_thread;
1537 if (internal == NULL)
1540 LOCK_THREAD (internal);
1542 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1544 UNLOCK_THREAD (internal);
1550 * mono_thread_get_managed_id:
1551 * \returns the \c Thread.ManagedThreadId value of \p thread.
1552 * Returns \c -1 if \p thread is NULL.
1555 mono_thread_get_managed_id (MonoThread *thread)
1560 MonoInternalThread *internal = thread->internal_thread;
1561 if (internal == NULL)
1564 int32_t id = internal->managed_id;
1570 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1575 error_init (&error);
1577 LOCK_THREAD (this_obj);
1579 if (!this_obj->name)
1582 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1584 UNLOCK_THREAD (this_obj);
1586 if (mono_error_set_pending_exception (&error))
1593 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1595 LOCK_THREAD (this_obj);
1600 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1601 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1602 UNLOCK_THREAD (this_obj);
1604 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1607 if (this_obj->name) {
1608 g_free (this_obj->name);
1609 this_obj->name_len = 0;
1612 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1613 this_obj->name_len = mono_string_length (name);
1616 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1619 this_obj->name = NULL;
1622 UNLOCK_THREAD (this_obj);
1624 if (this_obj->name && this_obj->tid) {
1625 char *tname = mono_string_to_utf8_checked (name, error);
1626 return_if_nok (error);
1627 MONO_PROFILER_RAISE (thread_name, (this_obj->tid, tname));
1628 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1634 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1637 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1638 mono_error_set_pending_exception (&error);
1642 * ves_icall_System_Threading_Thread_GetPriority_internal:
1643 * @param this_obj: The MonoInternalThread on which to operate.
1645 * Gets the priority of the given thread.
1646 * @return: The priority of the given thread.
1649 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1652 MonoInternalThread *internal = this_obj->internal_thread;
1654 LOCK_THREAD (internal);
1655 priority = internal->priority;
1656 UNLOCK_THREAD (internal);
1662 * ves_icall_System_Threading_Thread_SetPriority_internal:
1663 * @param this_obj: The MonoInternalThread on which to operate.
1664 * @param priority: The priority to set.
1666 * Sets the priority of the given thread.
1669 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1671 MonoInternalThread *internal = this_obj->internal_thread;
1673 LOCK_THREAD (internal);
1674 internal->priority = priority;
1675 if (internal->thread_info != NULL)
1676 mono_thread_internal_set_priority (internal, priority);
1677 UNLOCK_THREAD (internal);
1680 /* If the array is already in the requested domain, we just return it,
1681 otherwise we return a copy in that domain. */
1683 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1691 if (mono_object_domain (arr) == domain)
1694 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1695 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1700 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1703 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1704 mono_error_set_pending_exception (&error);
1709 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1712 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1713 mono_error_set_pending_exception (&error);
1718 * mono_thread_current:
1721 mono_thread_current (void)
1723 MonoDomain *domain = mono_domain_get ();
1724 MonoInternalThread *internal = mono_thread_internal_current ();
1725 MonoThread **current_thread_ptr;
1727 g_assert (internal);
1728 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1730 if (!*current_thread_ptr) {
1731 g_assert (domain != mono_get_root_domain ());
1732 *current_thread_ptr = create_thread_object (domain, internal);
1734 return *current_thread_ptr;
1737 /* Return the thread object belonging to INTERNAL in the current domain */
1739 mono_thread_current_for_thread (MonoInternalThread *internal)
1741 MonoDomain *domain = mono_domain_get ();
1742 MonoThread **current_thread_ptr;
1744 g_assert (internal);
1745 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1747 if (!*current_thread_ptr) {
1748 g_assert (domain != mono_get_root_domain ());
1749 *current_thread_ptr = create_thread_object (domain, internal);
1751 return *current_thread_ptr;
1755 mono_thread_internal_current (void)
1757 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1758 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1762 static MonoThreadInfoWaitRet
1763 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1766 MonoThreadInfoWaitRet ret;
1773 start = (ms == -1) ? 0 : mono_msec_ticks ();
1776 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1779 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1782 exc = mono_thread_execute_interruption ();
1784 mono_error_set_exception_instance (error, exc);
1791 /* Re-calculate ms according to the time passed */
1792 diff_ms = (gint32)(mono_msec_ticks () - start);
1793 if (diff_ms >= ms) {
1794 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1797 wait = ms - diff_ms;
1804 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1806 MonoInternalThread *thread = this_obj->internal_thread;
1807 MonoThreadHandle *handle = thread->handle;
1808 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1812 if (mono_thread_current_check_pending_interrupt ())
1815 LOCK_THREAD (thread);
1817 if ((thread->state & ThreadState_Unstarted) != 0) {
1818 UNLOCK_THREAD (thread);
1820 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1824 UNLOCK_THREAD (thread);
1827 ms=MONO_INFINITE_WAIT;
1829 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1831 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1833 ret=mono_join_uninterrupted (handle, ms, &error);
1835 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1837 mono_error_set_pending_exception (&error);
1839 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1840 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1845 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1850 #define MANAGED_WAIT_FAILED 0x7fffffff
1853 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1855 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1856 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1857 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1858 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1859 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1860 return WAIT_IO_COMPLETION;
1861 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1862 return WAIT_TIMEOUT;
1863 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1864 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1865 return MANAGED_WAIT_FAILED;
1867 g_error ("%s: unknown val value %d", __func__, val);
1872 ves_icall_System_Threading_WaitHandle_Wait_internal (gpointer *handles, gint32 numhandles, MonoBoolean waitall, gint32 timeout, MonoError *error)
1874 MonoW32HandleWaitRet ret;
1875 MonoInternalThread *thread;
1878 guint32 timeoutLeft;
1880 /* Do this WaitSleepJoin check before creating objects */
1881 if (mono_thread_current_check_pending_interrupt ())
1882 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1884 thread = mono_thread_internal_current ();
1886 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1889 timeout = MONO_INFINITE_WAIT;
1890 if (timeout != MONO_INFINITE_WAIT)
1891 start = mono_msec_ticks ();
1893 timeoutLeft = timeout;
1898 if (numhandles != 1)
1899 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, timeoutLeft, TRUE), numhandles);
1901 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], timeoutLeft, TRUE), 1);
1903 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1904 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, timeoutLeft, TRUE);
1905 #endif /* HOST_WIN32 */
1908 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1911 exc = mono_thread_execute_interruption ();
1913 mono_error_set_exception_instance (error, exc);
1917 if (timeout != MONO_INFINITE_WAIT) {
1920 elapsed = mono_msec_ticks () - start;
1921 if (elapsed >= timeout) {
1922 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1926 timeoutLeft = timeout - elapsed;
1930 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1932 return map_native_wait_result_to_managed (ret, numhandles);
1936 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (gpointer toSignal, gpointer toWait, gint32 ms, MonoError *error)
1938 MonoW32HandleWaitRet ret;
1939 MonoInternalThread *thread = mono_thread_internal_current ();
1942 ms = MONO_INFINITE_WAIT;
1944 if (mono_thread_current_check_pending_interrupt ())
1945 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1947 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1951 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
1953 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
1957 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1959 return map_native_wait_result_to_managed (ret, 1);
1962 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1964 return InterlockedIncrement (location);
1967 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1969 #if SIZEOF_VOID_P == 4
1970 if (G_UNLIKELY ((size_t)location & 0x7)) {
1972 mono_interlocked_lock ();
1975 mono_interlocked_unlock ();
1979 return InterlockedIncrement64 (location);
1982 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1984 return InterlockedDecrement(location);
1987 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1989 #if SIZEOF_VOID_P == 4
1990 if (G_UNLIKELY ((size_t)location & 0x7)) {
1992 mono_interlocked_lock ();
1995 mono_interlocked_unlock ();
1999 return InterlockedDecrement64 (location);
2002 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2004 return InterlockedExchange(location, value);
2007 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2010 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2011 mono_gc_wbarrier_generic_nostore (location);
2015 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2017 return InterlockedExchangePointer(location, value);
2020 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2022 IntFloatUnion val, ret;
2025 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2031 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2033 #if SIZEOF_VOID_P == 4
2034 if (G_UNLIKELY ((size_t)location & 0x7)) {
2036 mono_interlocked_lock ();
2039 mono_interlocked_unlock ();
2043 return InterlockedExchange64 (location, value);
2047 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2049 LongDoubleUnion val, ret;
2052 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2057 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2059 return InterlockedCompareExchange(location, value, comparand);
2062 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2064 gint32 r = InterlockedCompareExchange(location, value, comparand);
2065 *success = r == comparand;
2069 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2072 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2073 mono_gc_wbarrier_generic_nostore (location);
2077 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2079 return InterlockedCompareExchangePointer(location, value, comparand);
2082 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2084 IntFloatUnion val, ret, cmp;
2087 cmp.fval = comparand;
2088 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2094 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2096 #if SIZEOF_VOID_P == 8
2097 LongDoubleUnion val, comp, ret;
2100 comp.fval = comparand;
2101 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2107 mono_interlocked_lock ();
2109 if (old == comparand)
2111 mono_interlocked_unlock ();
2118 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2120 #if SIZEOF_VOID_P == 4
2121 if (G_UNLIKELY ((size_t)location & 0x7)) {
2123 mono_interlocked_lock ();
2125 if (old == comparand)
2127 mono_interlocked_unlock ();
2131 return InterlockedCompareExchange64 (location, value, comparand);
2135 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2138 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2139 mono_gc_wbarrier_generic_nostore (location);
2144 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2147 MONO_CHECK_NULL (location, NULL);
2148 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2149 mono_gc_wbarrier_generic_nostore (location);
2154 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2156 return InterlockedAdd (location, value);
2160 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2162 #if SIZEOF_VOID_P == 4
2163 if (G_UNLIKELY ((size_t)location & 0x7)) {
2165 mono_interlocked_lock ();
2168 mono_interlocked_unlock ();
2172 return InterlockedAdd64 (location, value);
2176 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2178 #if SIZEOF_VOID_P == 4
2179 if (G_UNLIKELY ((size_t)location & 0x7)) {
2181 mono_interlocked_lock ();
2183 mono_interlocked_unlock ();
2187 return InterlockedRead64 (location);
2191 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2193 mono_memory_barrier ();
2197 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2199 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2201 if (state & ThreadState_Background) {
2202 /* If the thread changes the background mode, the main thread has to
2203 * be notified, since it has to rebuild the list of threads to
2206 mono_os_event_set (&background_change_event);
2211 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2213 mono_thread_set_state (this_obj, (MonoThreadState)state);
2215 if (state & ThreadState_Background) {
2216 /* If the thread changes the background mode, the main thread has to
2217 * be notified, since it has to rebuild the list of threads to
2220 mono_os_event_set (&background_change_event);
2225 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2229 LOCK_THREAD (this_obj);
2231 state = this_obj->state;
2233 UNLOCK_THREAD (this_obj);
2238 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2240 MonoInternalThread *current;
2242 MonoInternalThread *thread = this_obj->internal_thread;
2244 LOCK_THREAD (thread);
2246 current = mono_thread_internal_current ();
2248 thread->thread_interrupt_requested = TRUE;
2249 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2251 UNLOCK_THREAD (thread);
2254 async_abort_internal (thread, FALSE);
2259 * mono_thread_current_check_pending_interrupt:
2260 * Checks if there's a interruption request and set the pending exception if so.
2261 * \returns true if a pending exception was set
2264 mono_thread_current_check_pending_interrupt (void)
2266 MonoInternalThread *thread = mono_thread_internal_current ();
2267 gboolean throw_ = FALSE;
2269 LOCK_THREAD (thread);
2271 if (thread->thread_interrupt_requested) {
2273 thread->thread_interrupt_requested = FALSE;
2276 UNLOCK_THREAD (thread);
2279 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2284 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2286 LOCK_THREAD (thread);
2288 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2290 UNLOCK_THREAD (thread);
2294 if ((thread->state & ThreadState_Unstarted) != 0) {
2295 thread->state |= ThreadState_Aborted;
2296 UNLOCK_THREAD (thread);
2300 thread->state |= ThreadState_AbortRequested;
2301 if (thread->abort_state_handle)
2302 mono_gchandle_free (thread->abort_state_handle);
2304 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2305 g_assert (thread->abort_state_handle);
2307 thread->abort_state_handle = 0;
2309 thread->abort_exc = NULL;
2311 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));
2313 /* During shutdown, we can't wait for other threads */
2315 /* Make sure the thread is awake */
2316 mono_thread_resume (thread);
2318 UNLOCK_THREAD (thread);
2323 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2325 if (!request_thread_abort (thread, state))
2328 if (thread == mono_thread_internal_current ()) {
2330 self_abort_internal (&error);
2331 mono_error_set_pending_exception (&error);
2333 async_abort_internal (thread, TRUE);
2338 * mono_thread_internal_abort:
2339 * Request thread \p thread to be aborted.
2340 * \p thread MUST NOT be the current thread.
2343 mono_thread_internal_abort (MonoInternalThread *thread)
2345 g_assert (thread != mono_thread_internal_current ());
2347 if (!request_thread_abort (thread, NULL))
2349 async_abort_internal (thread, TRUE);
2353 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2355 MonoInternalThread *thread = mono_thread_internal_current ();
2356 gboolean was_aborting;
2358 LOCK_THREAD (thread);
2359 was_aborting = thread->state & ThreadState_AbortRequested;
2360 thread->state &= ~ThreadState_AbortRequested;
2361 UNLOCK_THREAD (thread);
2363 if (!was_aborting) {
2364 const char *msg = "Unable to reset abort because no abort was requested";
2365 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2369 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2370 thread->abort_exc = NULL;
2371 if (thread->abort_state_handle) {
2372 mono_gchandle_free (thread->abort_state_handle);
2373 /* This is actually not necessary - the handle
2374 only counts if the exception is set */
2375 thread->abort_state_handle = 0;
2380 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2382 LOCK_THREAD (thread);
2384 thread->state &= ~ThreadState_AbortRequested;
2386 if (thread->abort_exc) {
2387 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2388 thread->abort_exc = NULL;
2389 if (thread->abort_state_handle) {
2390 mono_gchandle_free (thread->abort_state_handle);
2391 /* This is actually not necessary - the handle
2392 only counts if the exception is set */
2393 thread->abort_state_handle = 0;
2397 UNLOCK_THREAD (thread);
2401 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2404 MonoInternalThread *thread = this_obj->internal_thread;
2405 MonoObject *state, *deserialized = NULL;
2408 if (!thread->abort_state_handle)
2411 state = mono_gchandle_get_target (thread->abort_state_handle);
2414 domain = mono_domain_get ();
2415 if (mono_object_domain (state) == domain)
2418 deserialized = mono_object_xdomain_representation (state, domain, &error);
2420 if (!deserialized) {
2421 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2422 if (!is_ok (&error)) {
2423 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2424 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2426 mono_set_pending_exception (invalid_op_exc);
2430 return deserialized;
2434 mono_thread_suspend (MonoInternalThread *thread)
2436 LOCK_THREAD (thread);
2438 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2440 UNLOCK_THREAD (thread);
2444 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2446 UNLOCK_THREAD (thread);
2450 thread->state |= ThreadState_SuspendRequested;
2451 mono_os_event_reset (thread->suspended);
2453 if (thread == mono_thread_internal_current ()) {
2454 /* calls UNLOCK_THREAD (thread) */
2455 self_suspend_internal ();
2457 /* calls UNLOCK_THREAD (thread) */
2458 async_suspend_internal (thread, FALSE);
2465 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2467 if (!mono_thread_suspend (this_obj->internal_thread)) {
2468 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2473 /* LOCKING: LOCK_THREAD(thread) must be held */
2475 mono_thread_resume (MonoInternalThread *thread)
2477 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2478 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2479 thread->state &= ~ThreadState_SuspendRequested;
2480 mono_os_event_set (thread->suspended);
2484 if ((thread->state & ThreadState_Suspended) == 0 ||
2485 (thread->state & ThreadState_Unstarted) != 0 ||
2486 (thread->state & ThreadState_Aborted) != 0 ||
2487 (thread->state & ThreadState_Stopped) != 0)
2489 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2493 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2495 mono_os_event_set (thread->suspended);
2497 if (!thread->self_suspended) {
2498 UNLOCK_THREAD (thread);
2500 /* Awake the thread */
2501 if (!mono_thread_info_resume (thread_get_tid (thread)))
2504 LOCK_THREAD (thread);
2507 thread->state &= ~ThreadState_Suspended;
2513 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2515 if (!thread->internal_thread) {
2516 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2518 LOCK_THREAD (thread->internal_thread);
2519 if (!mono_thread_resume (thread->internal_thread))
2520 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2521 UNLOCK_THREAD (thread->internal_thread);
2526 mono_threads_is_critical_method (MonoMethod *method)
2528 switch (method->wrapper_type) {
2529 case MONO_WRAPPER_RUNTIME_INVOKE:
2530 case MONO_WRAPPER_XDOMAIN_INVOKE:
2531 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2538 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2543 if (mono_threads_is_critical_method (m)) {
2544 *((gboolean*)data) = TRUE;
2551 is_running_protected_wrapper (void)
2553 gboolean found = FALSE;
2554 mono_stack_walk (find_wrapper, &found);
2562 mono_thread_stop (MonoThread *thread)
2564 MonoInternalThread *internal = thread->internal_thread;
2566 if (!request_thread_abort (internal, NULL))
2569 if (internal == mono_thread_internal_current ()) {
2571 self_abort_internal (&error);
2573 This function is part of the embeding API and has no way to return the exception
2574 to be thrown. So what we do is keep the old behavior and raise the exception.
2576 mono_error_raise_exception (&error); /* OK to throw, see note */
2578 async_abort_internal (internal, TRUE);
2583 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2585 gint8 tmp = *(volatile gint8 *)ptr;
2586 mono_memory_barrier ();
2591 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2593 gint16 tmp = *(volatile gint16 *)ptr;
2594 mono_memory_barrier ();
2599 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2601 gint32 tmp = *(volatile gint32 *)ptr;
2602 mono_memory_barrier ();
2607 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2609 gint64 tmp = *(volatile gint64 *)ptr;
2610 mono_memory_barrier ();
2615 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2617 volatile void *tmp = *(volatile void **)ptr;
2618 mono_memory_barrier ();
2619 return (void *) tmp;
2623 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2625 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2626 mono_memory_barrier ();
2627 return (MonoObject *) tmp;
2631 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2633 double tmp = *(volatile double *)ptr;
2634 mono_memory_barrier ();
2639 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2641 float tmp = *(volatile float *)ptr;
2642 mono_memory_barrier ();
2647 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2649 return InterlockedRead8 ((volatile gint8 *)ptr);
2653 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2655 return InterlockedRead16 ((volatile gint16 *)ptr);
2659 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2661 return InterlockedRead ((volatile gint32 *)ptr);
2665 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2667 #if SIZEOF_VOID_P == 4
2668 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2670 mono_interlocked_lock ();
2671 val = *(gint64*)ptr;
2672 mono_interlocked_unlock ();
2676 return InterlockedRead64 ((volatile gint64 *)ptr);
2680 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2682 return InterlockedReadPointer ((volatile gpointer *)ptr);
2686 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2690 #if SIZEOF_VOID_P == 4
2691 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2693 mono_interlocked_lock ();
2694 val = *(double*)ptr;
2695 mono_interlocked_unlock ();
2700 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2706 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2710 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2716 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2718 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2722 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2724 mono_memory_barrier ();
2725 *(volatile gint8 *)ptr = value;
2729 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2731 mono_memory_barrier ();
2732 *(volatile gint16 *)ptr = value;
2736 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2738 mono_memory_barrier ();
2739 *(volatile gint32 *)ptr = value;
2743 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2745 mono_memory_barrier ();
2746 *(volatile gint64 *)ptr = value;
2750 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2752 mono_memory_barrier ();
2753 *(volatile void **)ptr = value;
2757 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2759 mono_memory_barrier ();
2760 mono_gc_wbarrier_generic_store (ptr, value);
2764 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2766 mono_memory_barrier ();
2767 *(volatile double *)ptr = value;
2771 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2773 mono_memory_barrier ();
2774 *(volatile float *)ptr = value;
2778 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2780 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2784 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2786 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2790 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2792 InterlockedWrite ((volatile gint32 *)ptr, value);
2796 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2798 #if SIZEOF_VOID_P == 4
2799 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2800 mono_interlocked_lock ();
2801 *(gint64*)ptr = value;
2802 mono_interlocked_unlock ();
2807 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2811 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2813 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2817 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2821 #if SIZEOF_VOID_P == 4
2822 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2823 mono_interlocked_lock ();
2824 *(double*)ptr = value;
2825 mono_interlocked_unlock ();
2832 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2836 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2842 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2846 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2848 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2852 free_context (void *user_data)
2854 ContextStaticData *data = user_data;
2856 mono_threads_lock ();
2859 * There is no guarantee that, by the point this reference queue callback
2860 * has been invoked, the GC handle associated with the object will fail to
2861 * resolve as one might expect. So if we don't free and remove the GC
2862 * handle here, free_context_static_data_helper () could end up resolving
2863 * a GC handle to an actually-dead context which would contain a pointer
2864 * to an already-freed static data segment, resulting in a crash when
2867 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2869 mono_threads_unlock ();
2871 mono_gchandle_free (data->gc_handle);
2872 mono_free_static_data (data->static_data);
2877 mono_threads_register_app_context (MonoAppContext *ctx, MonoError *error)
2880 mono_threads_lock ();
2882 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2885 contexts = g_hash_table_new (NULL, NULL);
2888 context_queue = mono_gc_reference_queue_new (free_context);
2890 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2891 g_hash_table_insert (contexts, gch, gch);
2894 * We use this intermediate structure to contain a duplicate pointer to
2895 * the static data because we can't rely on being able to resolve the GC
2896 * handle in the reference queue callback.
2898 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2899 data->gc_handle = GPOINTER_TO_UINT (gch);
2902 context_adjust_static_data (ctx);
2903 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2905 mono_threads_unlock ();
2907 MONO_PROFILER_RAISE (context_loaded, (ctx));
2911 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContextHandle ctx, MonoError *error)
2914 mono_threads_register_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_register_app_context */
2918 mono_threads_release_app_context (MonoAppContext* ctx, MonoError *error)
2921 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2922 * cleanup in exceptional circumstances, we don't actually do any
2923 * cleanup work here. We instead do this via a reference queue.
2926 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2928 MONO_PROFILER_RAISE (context_unloaded, (ctx));
2932 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContextHandle ctx, MonoError *error)
2935 mono_threads_release_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_release_app_context */
2938 void mono_thread_init (MonoThreadStartCB start_cb,
2939 MonoThreadAttachCB attach_cb)
2941 mono_coop_mutex_init_recursive (&threads_mutex);
2943 mono_os_mutex_init_recursive(&interlocked_mutex);
2944 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2946 mono_os_event_init (&background_change_event, FALSE);
2948 mono_init_static_data_info (&thread_static_info);
2949 mono_init_static_data_info (&context_static_info);
2951 mono_thread_start_cb = start_cb;
2952 mono_thread_attach_cb = attach_cb;
2956 thread_attach (MonoThreadInfo *info)
2958 return mono_gc_thread_attach (info);
2962 thread_detach (MonoThreadInfo *info)
2964 MonoInternalThread *internal;
2967 /* If a delegate is passed to native code and invoked on a thread we dont
2968 * know about, marshal will register it with mono_threads_attach_coop, but
2969 * we have no way of knowing when that thread goes away. SGen has a TSD
2970 * so we assume that if the domain is still registered, we can detach
2975 if (!mono_thread_info_try_get_internal_thread_gchandle (info, &gchandle))
2978 internal = (MonoInternalThread*) mono_gchandle_get_target (gchandle);
2979 g_assert (internal);
2981 mono_gchandle_free (gchandle);
2983 mono_thread_detach_internal (internal);
2987 thread_detach_with_lock (MonoThreadInfo *info)
2989 return mono_gc_thread_detach_with_lock (info);
2993 thread_in_critical_region (MonoThreadInfo *info)
2995 return mono_gc_thread_in_critical_region (info);
2999 ip_in_critical_region (MonoDomain *domain, gpointer ip)
3005 * We pass false for 'try_aot' so this becomes async safe.
3006 * It won't find aot methods whose jit info is not yet loaded,
3007 * so we preload their jit info in the JIT.
3009 ji = mono_jit_info_table_find_internal (domain, ip, FALSE, FALSE);
3013 method = mono_jit_info_get_method (ji);
3016 return mono_gc_is_critical_method (method);
3020 mono_thread_callbacks_init (void)
3022 MonoThreadInfoCallbacks cb;
3024 memset (&cb, 0, sizeof(cb));
3025 cb.thread_attach = thread_attach;
3026 cb.thread_detach = thread_detach;
3027 cb.thread_detach_with_lock = thread_detach_with_lock;
3028 cb.ip_in_critical_region = ip_in_critical_region;
3029 cb.thread_in_critical_region = thread_in_critical_region;
3030 mono_thread_info_callbacks_init (&cb);
3034 * mono_thread_cleanup:
3037 mono_thread_cleanup (void)
3039 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3040 /* The main thread must abandon any held mutexes (particularly
3041 * important for named mutexes as they are shared across
3042 * processes, see bug 74680.) This will happen when the
3043 * thread exits, but if it's not running in a subthread it
3044 * won't exit in time.
3046 mono_w32mutex_abandon ();
3050 /* This stuff needs more testing, it seems one of these
3051 * critical sections can be locked when mono_thread_cleanup is
3054 mono_coop_mutex_destroy (&threads_mutex);
3055 mono_os_mutex_destroy (&interlocked_mutex);
3056 mono_os_mutex_destroy (&delayed_free_table_mutex);
3057 mono_os_mutex_destroy (&small_id_mutex);
3058 mono_os_event_destroy (&background_change_event);
3063 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3065 mono_thread_cleanup_fn = func;
3069 * mono_thread_set_manage_callback:
3072 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3074 thread->internal_thread->manage_callback = func;
3078 static void print_tids (gpointer key, gpointer value, gpointer user)
3080 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3081 * sizeof(uint) and a cast to uint would overflow
3083 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3084 * print this as a pointer.
3086 g_message ("Waiting for: %p", key);
3091 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3092 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3097 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3100 MonoThreadInfoWaitRet ret;
3102 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3104 /* Add the thread state change event, so it wakes
3105 * up if a thread changes to background mode. */
3108 if (check_state_change)
3109 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3111 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3114 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3115 /* See the comment in build_wait_tids() */
3116 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3120 for( i = 0; i < wait->num; i++)
3121 mono_threads_close_thread_handle (wait->handles [i]);
3123 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3126 if (ret < wait->num) {
3127 MonoInternalThread *internal;
3129 internal = wait->threads [ret];
3131 mono_threads_lock ();
3132 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3133 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3134 mono_threads_unlock ();
3138 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3140 struct wait_data *wait=(struct wait_data *)user;
3142 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3143 MonoInternalThread *thread=(MonoInternalThread *)value;
3145 /* Ignore background threads, we abort them later */
3146 /* Do not lock here since it is not needed and the caller holds threads_lock */
3147 if (thread->state & ThreadState_Background) {
3148 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3149 return; /* just leave, ignore */
3152 if (mono_gc_is_finalizer_internal_thread (thread)) {
3153 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3157 if (thread == mono_thread_internal_current ()) {
3158 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3162 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3163 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3167 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3168 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3172 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3173 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3174 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3175 wait->threads[wait->num]=thread;
3178 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3180 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3185 /* Just ignore the rest, we can't do anything with
3192 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3194 struct wait_data *wait=(struct wait_data *)user;
3195 MonoNativeThreadId self = mono_native_thread_id_get ();
3196 MonoInternalThread *thread = (MonoInternalThread *)value;
3198 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3201 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3203 if (mono_gc_is_finalizer_internal_thread (thread))
3206 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3207 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3208 wait->threads[wait->num] = thread;
3211 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3212 mono_thread_internal_abort (thread);
3219 * mono_threads_set_shutting_down:
3221 * Is called by a thread that wants to shut down Mono. If the runtime is already
3222 * shutting down, the calling thread is suspended/stopped, and this function never
3226 mono_threads_set_shutting_down (void)
3228 MonoInternalThread *current_thread = mono_thread_internal_current ();
3230 mono_threads_lock ();
3232 if (shutting_down) {
3233 mono_threads_unlock ();
3235 /* Make sure we're properly suspended/stopped */
3237 LOCK_THREAD (current_thread);
3239 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3240 UNLOCK_THREAD (current_thread);
3241 mono_thread_execute_interruption ();
3243 UNLOCK_THREAD (current_thread);
3246 /*since we're killing the thread, detach it.*/
3247 mono_thread_detach_internal (current_thread);
3249 /* Wake up other threads potentially waiting for us */
3250 mono_thread_info_exit (0);
3252 shutting_down = TRUE;
3254 /* Not really a background state change, but this will
3255 * interrupt the main thread if it is waiting for all
3256 * the other threads.
3258 mono_os_event_set (&background_change_event);
3260 mono_threads_unlock ();
3265 * mono_thread_manage:
3268 mono_thread_manage (void)
3270 struct wait_data wait_data;
3271 struct wait_data *wait = &wait_data;
3273 memset (wait, 0, sizeof (struct wait_data));
3274 /* join each thread that's still running */
3275 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3277 mono_threads_lock ();
3279 THREAD_DEBUG (g_message("%s: No threads", __func__));
3280 mono_threads_unlock ();
3283 mono_threads_unlock ();
3286 mono_threads_lock ();
3287 if (shutting_down) {
3288 /* somebody else is shutting down */
3289 mono_threads_unlock ();
3292 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3293 mono_g_hash_table_foreach (threads, print_tids, NULL));
3295 mono_os_event_reset (&background_change_event);
3297 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3298 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3299 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3300 mono_threads_unlock ();
3302 /* Something to wait for */
3303 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3304 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3305 } while(wait->num>0);
3307 /* Mono is shutting down, so just wait for the end */
3308 if (!mono_runtime_try_shutdown ()) {
3309 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3310 mono_thread_suspend (mono_thread_internal_current ());
3311 mono_thread_execute_interruption ();
3315 * Remove everything but the finalizer thread and self.
3316 * Also abort all the background threads
3319 mono_threads_lock ();
3322 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3323 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3324 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3326 mono_threads_unlock ();
3328 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3329 if (wait->num > 0) {
3330 /* Something to wait for */
3331 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3333 } while (wait->num > 0);
3336 * give the subthreads a chance to really quit (this is mainly needed
3337 * to get correct user and system times from getrusage/wait/time(1)).
3338 * This could be removed if we avoid pthread_detach() and use pthread_join().
3340 mono_thread_info_yield ();
3344 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3346 MonoInternalThread *thread = (MonoInternalThread*)value;
3347 struct wait_data *wait = (struct wait_data*)user_data;
3350 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3352 * This needs no locking.
3354 if ((thread->state & ThreadState_Suspended) != 0 ||
3355 (thread->state & ThreadState_Stopped) != 0)
3358 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3359 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3360 wait->threads [wait->num] = thread;
3366 * mono_thread_suspend_all_other_threads:
3368 * Suspend all managed threads except the finalizer thread and this thread. It is
3369 * not possible to resume them later.
3371 void mono_thread_suspend_all_other_threads (void)
3373 struct wait_data wait_data;
3374 struct wait_data *wait = &wait_data;
3376 MonoNativeThreadId self = mono_native_thread_id_get ();
3377 guint32 eventidx = 0;
3378 gboolean starting, finished;
3380 memset (wait, 0, sizeof (struct wait_data));
3382 * The other threads could be in an arbitrary state at this point, i.e.
3383 * they could be starting up, shutting down etc. This means that there could be
3384 * threads which are not even in the threads hash table yet.
3388 * First we set a barrier which will be checked by all threads before they
3389 * are added to the threads hash table, and they will exit if the flag is set.
3390 * This ensures that no threads could be added to the hash later.
3391 * We will use shutting_down as the barrier for now.
3393 g_assert (shutting_down);
3396 * We make multiple calls to WaitForMultipleObjects since:
3397 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3398 * - some threads could exit without becoming suspended
3403 * Make a copy of the hashtable since we can't do anything with
3404 * threads while threads_mutex is held.
3407 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3408 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3409 mono_threads_lock ();
3410 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3411 mono_threads_unlock ();
3414 /* Get the suspended events that we'll be waiting for */
3415 for (i = 0; i < wait->num; ++i) {
3416 MonoInternalThread *thread = wait->threads [i];
3418 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3419 || mono_gc_is_finalizer_internal_thread (thread)
3420 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3422 mono_threads_close_thread_handle (wait->handles [i]);
3423 wait->threads [i] = NULL;
3427 LOCK_THREAD (thread);
3429 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3430 UNLOCK_THREAD (thread);
3431 mono_threads_close_thread_handle (wait->handles [i]);
3432 wait->threads [i] = NULL;
3438 /* Convert abort requests into suspend requests */
3439 if ((thread->state & ThreadState_AbortRequested) != 0)
3440 thread->state &= ~ThreadState_AbortRequested;
3442 thread->state |= ThreadState_SuspendRequested;
3443 mono_os_event_reset (thread->suspended);
3445 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3446 async_suspend_internal (thread, TRUE);
3448 mono_threads_close_thread_handle (wait->handles [i]);
3449 wait->threads [i] = NULL;
3451 if (eventidx <= 0) {
3453 * If there are threads which are starting up, we wait until they
3454 * are suspended when they try to register in the threads hash.
3455 * This is guaranteed to finish, since the threads which can create new
3456 * threads get suspended after a while.
3457 * FIXME: The finalizer thread can still create new threads.
3459 mono_threads_lock ();
3460 if (threads_starting_up)
3461 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3464 mono_threads_unlock ();
3466 mono_thread_info_sleep (100, NULL);
3474 MonoInternalThread *thread;
3475 MonoStackFrameInfo *frames;
3476 int nframes, max_frames;
3477 int nthreads, max_threads;
3478 MonoInternalThread **threads;
3479 } ThreadDumpUserData;
3481 static gboolean thread_dump_requested;
3483 /* This needs to be async safe */
3485 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3487 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3489 if (ud->nframes < ud->max_frames) {
3490 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3497 /* This needs to be async safe */
3498 static SuspendThreadResult
3499 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3501 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3502 MonoInternalThread *thread = user_data->thread;
3505 /* This no longer works with remote unwinding */
3506 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3507 mono_thread_internal_describe (thread, text);
3508 g_string_append (text, "\n");
3511 if (thread == mono_thread_internal_current ())
3512 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3514 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3516 return MonoResumeThread;
3520 int nthreads, max_threads;
3521 MonoInternalThread **threads;
3522 } CollectThreadsUserData;
3525 collect_thread (gpointer key, gpointer value, gpointer user)
3527 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3528 MonoInternalThread *thread = (MonoInternalThread *)value;
3530 if (ud->nthreads < ud->max_threads)
3531 ud->threads [ud->nthreads ++] = thread;
3535 * Collect running threads into the THREADS array.
3536 * THREADS should be an array allocated on the stack.
3539 collect_threads (MonoInternalThread **thread_array, int max_threads)
3541 CollectThreadsUserData ud;
3543 memset (&ud, 0, sizeof (ud));
3544 /* This array contains refs, but its on the stack, so its ok */
3545 ud.threads = thread_array;
3546 ud.max_threads = max_threads;
3548 mono_threads_lock ();
3549 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3550 mono_threads_unlock ();
3556 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3558 GString* text = g_string_new (0);
3560 GError *error = NULL;
3563 ud->thread = thread;
3566 /* Collect frames for the thread */
3567 if (thread == mono_thread_internal_current ()) {
3568 get_thread_dump (mono_thread_info_current (), ud);
3570 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3574 * Do all the non async-safe work outside of get_thread_dump.
3577 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3579 g_string_append_printf (text, "\n\"%s\"", name);
3582 else if (thread->threadpool_thread) {
3583 g_string_append (text, "\n\"<threadpool thread>\"");
3585 g_string_append (text, "\n\"<unnamed thread>\"");
3588 for (i = 0; i < ud->nframes; ++i) {
3589 MonoStackFrameInfo *frame = &ud->frames [i];
3590 MonoMethod *method = NULL;
3592 if (frame->type == FRAME_TYPE_MANAGED)
3593 method = mono_jit_info_get_method (frame->ji);
3596 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3597 g_string_append_printf (text, " %s\n", location);
3600 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3604 fprintf (stdout, "%s", text->str);
3606 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3607 OutputDebugStringA(text->str);
3610 g_string_free (text, TRUE);
3615 mono_threads_perform_thread_dump (void)
3617 ThreadDumpUserData ud;
3618 MonoInternalThread *thread_array [128];
3619 int tindex, nthreads;
3621 if (!thread_dump_requested)
3624 printf ("Full thread dump:\n");
3626 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3627 nthreads = collect_threads (thread_array, 128);
3629 memset (&ud, 0, sizeof (ud));
3630 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3631 ud.max_frames = 256;
3633 for (tindex = 0; tindex < nthreads; ++tindex)
3634 dump_thread (thread_array [tindex], &ud);
3638 thread_dump_requested = FALSE;
3641 /* Obtain the thread dump of all threads */
3643 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3646 ThreadDumpUserData ud;
3647 MonoInternalThread *thread_array [128];
3648 MonoDomain *domain = mono_domain_get ();
3649 MonoDebugSourceLocation *location;
3650 int tindex, nthreads;
3654 *out_threads = NULL;
3655 *out_stack_frames = NULL;
3657 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3658 nthreads = collect_threads (thread_array, 128);
3660 memset (&ud, 0, sizeof (ud));
3661 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3662 ud.max_frames = 256;
3664 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3667 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3671 for (tindex = 0; tindex < nthreads; ++tindex) {
3672 MonoInternalThread *thread = thread_array [tindex];
3673 MonoArray *thread_frames;
3679 /* Collect frames for the thread */
3680 if (thread == mono_thread_internal_current ()) {
3681 get_thread_dump (mono_thread_info_current (), &ud);
3683 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3686 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3688 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3691 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3693 for (i = 0; i < ud.nframes; ++i) {
3694 MonoStackFrameInfo *frame = &ud.frames [i];
3695 MonoMethod *method = NULL;
3696 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3700 sf->native_offset = frame->native_offset;
3702 if (frame->type == FRAME_TYPE_MANAGED)
3703 method = mono_jit_info_get_method (frame->ji);
3706 sf->method_address = (gsize) frame->ji->code_start;
3708 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3711 MONO_OBJECT_SETREF (sf, method, rm);
3713 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3715 sf->il_offset = location->il_offset;
3717 if (location && location->source_file) {
3718 MonoString *filename = mono_string_new_checked (domain, location->source_file, error);
3721 MONO_OBJECT_SETREF (sf, filename, filename);
3722 sf->line = location->row;
3723 sf->column = location->column;
3725 mono_debug_free_source_location (location);
3730 mono_array_setref (thread_frames, i, sf);
3736 return is_ok (error);
3740 * mono_threads_request_thread_dump:
3742 * Ask all threads except the current to print their stacktrace to stdout.
3745 mono_threads_request_thread_dump (void)
3747 /*The new thread dump code runs out of the finalizer thread. */
3748 thread_dump_requested = TRUE;
3749 mono_gc_finalize_notify ();
3754 gint allocated; /* +1 so that refs [allocated] == NULL */
3758 typedef struct ref_stack RefStack;
3761 ref_stack_new (gint initial_size)
3765 initial_size = MAX (initial_size, 16) + 1;
3766 rs = g_new0 (RefStack, 1);
3767 rs->refs = g_new0 (gpointer, initial_size);
3768 rs->allocated = initial_size;
3773 ref_stack_destroy (gpointer ptr)
3775 RefStack *rs = (RefStack *)ptr;
3784 ref_stack_push (RefStack *rs, gpointer ptr)
3786 g_assert (rs != NULL);
3788 if (rs->bottom >= rs->allocated) {
3789 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3790 rs->allocated <<= 1;
3791 rs->refs [rs->allocated] = NULL;
3793 rs->refs [rs->bottom++] = ptr;
3797 ref_stack_pop (RefStack *rs)
3799 if (rs == NULL || rs->bottom == 0)
3803 rs->refs [rs->bottom] = NULL;
3807 ref_stack_find (RefStack *rs, gpointer ptr)
3814 for (refs = rs->refs; refs && *refs; refs++) {
3822 * mono_thread_push_appdomain_ref:
3824 * Register that the current thread may have references to objects in domain
3825 * @domain on its stack. Each call to this function should be paired with a
3826 * call to pop_appdomain_ref.
3829 mono_thread_push_appdomain_ref (MonoDomain *domain)
3831 MonoInternalThread *thread = mono_thread_internal_current ();
3834 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3835 SPIN_LOCK (thread->lock_thread_id);
3836 if (thread->appdomain_refs == NULL)
3837 thread->appdomain_refs = ref_stack_new (16);
3838 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3839 SPIN_UNLOCK (thread->lock_thread_id);
3844 mono_thread_pop_appdomain_ref (void)
3846 MonoInternalThread *thread = mono_thread_internal_current ();
3849 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3850 SPIN_LOCK (thread->lock_thread_id);
3851 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3852 SPIN_UNLOCK (thread->lock_thread_id);
3857 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3860 SPIN_LOCK (thread->lock_thread_id);
3861 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3862 SPIN_UNLOCK (thread->lock_thread_id);
3867 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3869 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3872 typedef struct abort_appdomain_data {
3873 struct wait_data wait;
3875 } abort_appdomain_data;
3878 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3880 MonoInternalThread *thread = (MonoInternalThread*)value;
3881 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3882 MonoDomain *domain = data->domain;
3884 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3885 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3887 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3888 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3889 data->wait.threads [data->wait.num] = thread;
3892 /* Just ignore the rest, we can't do anything with
3900 * mono_threads_abort_appdomain_threads:
3902 * Abort threads which has references to the given appdomain.
3905 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3907 abort_appdomain_data user_data;
3909 int orig_timeout = timeout;
3912 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3914 start_time = mono_msec_ticks ();
3916 mono_threads_lock ();
3918 user_data.domain = domain;
3919 user_data.wait.num = 0;
3920 /* This shouldn't take any locks */
3921 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3922 mono_threads_unlock ();
3924 if (user_data.wait.num > 0) {
3925 /* Abort the threads outside the threads lock */
3926 for (i = 0; i < user_data.wait.num; ++i)
3927 mono_thread_internal_abort (user_data.wait.threads [i]);
3930 * We should wait for the threads either to abort, or to leave the
3931 * domain. We can't do the latter, so we wait with a timeout.
3933 wait_for_tids (&user_data.wait, 100, FALSE);
3936 /* Update remaining time */
3937 timeout -= mono_msec_ticks () - start_time;
3938 start_time = mono_msec_ticks ();
3940 if (orig_timeout != -1 && timeout < 0)
3943 while (user_data.wait.num > 0);
3945 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3951 mono_thread_self_abort (void)
3954 self_abort_internal (&error);
3955 mono_error_set_pending_exception (&error);
3959 * mono_thread_get_undeniable_exception:
3961 * Return an exception which needs to be raised when leaving a catch clause.
3962 * This is used for undeniable exception propagation.
3965 mono_thread_get_undeniable_exception (void)
3967 MonoInternalThread *thread = mono_thread_internal_current ();
3969 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3972 // We don't want to have our exception effect calls made by
3973 // the catching block
3975 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3979 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3980 * exception if the thread no longer references a dying appdomain.
3982 thread->abort_exc->trace_ips = NULL;
3983 thread->abort_exc->stack_trace = NULL;
3984 return thread->abort_exc;
3987 #if MONO_SMALL_CONFIG
3988 #define NUM_STATIC_DATA_IDX 4
3989 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3993 #define NUM_STATIC_DATA_IDX 8
3994 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3995 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3999 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
4000 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
4003 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
4005 gpointer *static_data = (gpointer *)addr;
4007 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
4008 void **ptr = (void **)static_data [i];
4013 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4014 void **p = ptr + idx;
4017 mark_func ((MonoObject**)p, gc_data);
4023 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4025 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4029 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4031 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4035 * mono_alloc_static_data
4037 * Allocate memory blocks for storing threads or context static data
4040 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4042 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4045 gpointer* static_data = *static_data_ptr;
4047 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4048 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4050 if (mono_gc_user_markers_supported ()) {
4051 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4052 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4054 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4055 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4058 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4059 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4060 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4061 *static_data_ptr = static_data;
4062 static_data [0] = static_data;
4065 for (i = 1; i <= idx; ++i) {
4066 if (static_data [i])
4069 if (mono_gc_user_markers_supported ())
4070 static_data [i] = g_malloc0 (static_data_size [i]);
4072 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4073 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4074 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4079 mono_free_static_data (gpointer* static_data)
4082 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4083 gpointer p = static_data [i];
4087 * At this point, the static data pointer array is still registered with the
4088 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4089 * data. Freeing the individual arrays without first nulling their slots
4090 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4091 * such an already freed array. See bug #13813.
4093 static_data [i] = NULL;
4094 mono_memory_write_barrier ();
4095 if (mono_gc_user_markers_supported ())
4098 mono_gc_free_fixed (p);
4100 mono_gc_free_fixed (static_data);
4104 * mono_init_static_data_info
4106 * Initializes static data counters
4108 static void mono_init_static_data_info (StaticDataInfo *static_data)
4110 static_data->idx = 0;
4111 static_data->offset = 0;
4112 static_data->freelist = NULL;
4116 * mono_alloc_static_data_slot
4118 * Generates an offset for static data. static_data contains the counters
4119 * used to generate it.
4122 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4124 if (!static_data->idx && !static_data->offset) {
4126 * we use the first chunk of the first allocation also as
4127 * an array for the rest of the data
4129 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4131 static_data->offset += align - 1;
4132 static_data->offset &= ~(align - 1);
4133 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4134 static_data->idx ++;
4135 g_assert (size <= static_data_size [static_data->idx]);
4136 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4137 static_data->offset = 0;
4139 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4140 static_data->offset += size;
4145 * LOCKING: requires that threads_mutex is held
4148 context_adjust_static_data (MonoAppContext *ctx)
4150 if (context_static_info.offset || context_static_info.idx > 0) {
4151 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4152 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4153 ctx->data->static_data = ctx->static_data;
4158 * LOCKING: requires that threads_mutex is held
4161 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4163 MonoInternalThread *thread = (MonoInternalThread *)value;
4164 guint32 offset = GPOINTER_TO_UINT (user);
4166 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4170 * LOCKING: requires that threads_mutex is held
4173 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4175 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4180 guint32 offset = GPOINTER_TO_UINT (user);
4181 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4182 ctx->data->static_data = ctx->static_data;
4185 static StaticDataFreeList*
4186 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4188 StaticDataFreeList* prev = NULL;
4189 StaticDataFreeList* tmp = static_data->freelist;
4191 if (tmp->size == size) {
4193 prev->next = tmp->next;
4195 static_data->freelist = tmp->next;
4204 #if SIZEOF_VOID_P == 4
4211 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4213 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4215 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4216 MonoBitSet *rb = sets [idx];
4217 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4218 offset /= sizeof (uintptr_t);
4219 /* offset is now the bitmap offset */
4220 for (int i = 0; i < numbits; ++i) {
4221 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4222 mono_bitset_set_fast (rb, offset + i);
4227 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4229 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4230 MonoBitSet *rb = sets [idx];
4231 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4232 offset /= sizeof (uintptr_t);
4233 /* offset is now the bitmap offset */
4234 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4235 mono_bitset_clear_fast (rb, offset + i);
4239 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4241 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4243 StaticDataInfo *info;
4246 if (static_type == SPECIAL_STATIC_THREAD) {
4247 info = &thread_static_info;
4248 sets = thread_reference_bitmaps;
4250 info = &context_static_info;
4251 sets = context_reference_bitmaps;
4254 mono_threads_lock ();
4256 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4260 offset = item->offset;
4263 offset = mono_alloc_static_data_slot (info, size, align);
4266 update_reference_bitmap (sets, offset, bitmap, numbits);
4268 if (static_type == SPECIAL_STATIC_THREAD) {
4269 /* This can be called during startup */
4270 if (threads != NULL)
4271 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4273 if (contexts != NULL)
4274 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4276 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4279 mono_threads_unlock ();
4285 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4287 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4289 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4290 return get_thread_static_data (thread, offset);
4292 return get_context_static_data (thread->current_appcontext, offset);
4297 mono_get_special_static_data (guint32 offset)
4299 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4308 * LOCKING: requires that threads_mutex is held
4311 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4313 MonoInternalThread *thread = (MonoInternalThread *)value;
4314 OffsetSize *data = (OffsetSize *)user;
4315 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4316 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4319 if (!thread->static_data || !thread->static_data [idx])
4321 ptr = ((char*) thread->static_data [idx]) + off;
4322 mono_gc_bzero_atomic (ptr, data->size);
4326 * LOCKING: requires that threads_mutex is held
4329 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4331 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4336 OffsetSize *data = (OffsetSize *)user;
4337 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4338 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4341 if (!ctx->static_data || !ctx->static_data [idx])
4344 ptr = ((char*) ctx->static_data [idx]) + off;
4345 mono_gc_bzero_atomic (ptr, data->size);
4349 do_free_special_slot (guint32 offset, guint32 size)
4351 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4353 StaticDataInfo *info;
4355 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4356 info = &thread_static_info;
4357 sets = thread_reference_bitmaps;
4359 info = &context_static_info;
4360 sets = context_reference_bitmaps;
4363 guint32 data_offset = offset;
4364 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4365 OffsetSize data = { data_offset, size };
4367 clear_reference_bitmap (sets, data.offset, data.size);
4369 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4370 if (threads != NULL)
4371 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4373 if (contexts != NULL)
4374 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4377 if (!mono_runtime_is_shutting_down ()) {
4378 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4380 item->offset = offset;
4383 item->next = info->freelist;
4384 info->freelist = item;
4389 do_free_special (gpointer key, gpointer value, gpointer data)
4391 MonoClassField *field = (MonoClassField *)key;
4392 guint32 offset = GPOINTER_TO_UINT (value);
4395 size = mono_type_size (field->type, &align);
4396 do_free_special_slot (offset, size);
4400 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4402 mono_threads_lock ();
4404 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4406 mono_threads_unlock ();
4410 static void CALLBACK dummy_apc (ULONG_PTR param)
4416 * mono_thread_execute_interruption
4418 * Performs the operation that the requested thread state requires (abort,
4421 static MonoException*
4422 mono_thread_execute_interruption (void)
4424 MonoInternalThread *thread = mono_thread_internal_current ();
4425 MonoThread *sys_thread = mono_thread_current ();
4427 LOCK_THREAD (thread);
4429 /* MonoThread::interruption_requested can only be changed with atomics */
4430 if (!mono_thread_clear_interruption_requested (thread)) {
4431 UNLOCK_THREAD (thread);
4435 /* this will consume pending APC calls */
4437 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4439 /* Clear the interrupted flag of the thread so it can wait again */
4440 mono_thread_info_clear_self_interrupt ();
4442 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4443 if (sys_thread->pending_exception) {
4446 exc = sys_thread->pending_exception;
4447 sys_thread->pending_exception = NULL;
4449 UNLOCK_THREAD (thread);
4451 } else if (thread->state & (ThreadState_AbortRequested)) {
4452 UNLOCK_THREAD (thread);
4453 g_assert (sys_thread->pending_exception == NULL);
4454 if (thread->abort_exc == NULL) {
4456 * This might be racy, but it has to be called outside the lock
4457 * since it calls managed code.
4459 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4461 return thread->abort_exc;
4462 } else if (thread->state & (ThreadState_SuspendRequested)) {
4463 /* calls UNLOCK_THREAD (thread) */
4464 self_suspend_internal ();
4466 } else if (thread->thread_interrupt_requested) {
4468 thread->thread_interrupt_requested = FALSE;
4469 UNLOCK_THREAD (thread);
4471 return(mono_get_exception_thread_interrupted ());
4474 UNLOCK_THREAD (thread);
4480 * mono_thread_request_interruption
4482 * A signal handler can call this method to request the interruption of a
4483 * thread. The result of the interruption will depend on the current state of
4484 * the thread. If the result is an exception that needs to be throw, it is
4485 * provided as return value.
4488 mono_thread_request_interruption (gboolean running_managed)
4490 MonoInternalThread *thread = mono_thread_internal_current ();
4492 /* The thread may already be stopping */
4496 if (!mono_thread_set_interruption_requested (thread))
4499 if (!running_managed || is_running_protected_wrapper ()) {
4500 /* Can't stop while in unmanaged code. Increase the global interruption
4501 request count. When exiting the unmanaged method the count will be
4502 checked and the thread will be interrupted. */
4504 /* this will awake the thread if it is in WaitForSingleObject
4506 /* Our implementation of this function ignores the func argument */
4508 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4510 mono_thread_info_self_interrupt ();
4515 return mono_thread_execute_interruption ();
4519 /*This function should be called by a thread after it has exited all of
4520 * its handle blocks at interruption time.*/
4522 mono_thread_resume_interruption (gboolean exec)
4524 MonoInternalThread *thread = mono_thread_internal_current ();
4525 gboolean still_aborting;
4527 /* The thread may already be stopping */
4531 LOCK_THREAD (thread);
4532 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4533 UNLOCK_THREAD (thread);
4535 /*This can happen if the protected block called Thread::ResetAbort*/
4536 if (!still_aborting)
4539 if (!mono_thread_set_interruption_requested (thread))
4542 mono_thread_info_self_interrupt ();
4545 return mono_thread_execute_interruption ();
4550 gboolean mono_thread_interruption_requested ()
4552 if (thread_interruption_requested) {
4553 MonoInternalThread *thread = mono_thread_internal_current ();
4554 /* The thread may already be stopping */
4556 return mono_thread_get_interruption_requested (thread);
4561 static MonoException*
4562 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4564 MonoInternalThread *thread = mono_thread_internal_current ();
4566 /* The thread may already be stopping */
4569 if (!mono_thread_get_interruption_requested (thread))
4571 if (!bypass_abort_protection && is_running_protected_wrapper ())
4574 return mono_thread_execute_interruption ();
4578 * Performs the interruption of the current thread, if one has been requested,
4579 * and the thread is not running a protected wrapper.
4580 * Return the exception which needs to be thrown, if any.
4583 mono_thread_interruption_checkpoint (void)
4585 return mono_thread_interruption_checkpoint_request (FALSE);
4589 * Performs the interruption of the current thread, if one has been requested.
4590 * Return the exception which needs to be thrown, if any.
4593 mono_thread_force_interruption_checkpoint_noraise (void)
4595 return mono_thread_interruption_checkpoint_request (TRUE);
4599 * mono_set_pending_exception:
4601 * Set the pending exception of the current thread to EXC.
4602 * The exception will be thrown when execution returns to managed code.
4605 mono_set_pending_exception (MonoException *exc)
4607 MonoThread *thread = mono_thread_current ();
4609 /* The thread may already be stopping */
4613 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4615 mono_thread_request_interruption (FALSE);
4619 * mono_thread_interruption_request_flag:
4621 * Returns the address of a flag that will be non-zero if an interruption has
4622 * been requested for a thread. The thread to interrupt may not be the current
4623 * thread, so an additional call to mono_thread_interruption_requested() or
4624 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4627 gint32* mono_thread_interruption_request_flag ()
4629 return &thread_interruption_requested;
4633 mono_thread_init_apartment_state (void)
4636 MonoInternalThread* thread = mono_thread_internal_current ();
4638 /* Positive return value indicates success, either
4639 * S_OK if this is first CoInitialize call, or
4640 * S_FALSE if CoInitialize already called, but with same
4641 * threading model. A negative value indicates failure,
4642 * probably due to trying to change the threading model.
4644 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4645 ? COINIT_APARTMENTTHREADED
4646 : COINIT_MULTITHREADED) < 0) {
4647 thread->apartment_state = ThreadApartmentState_Unknown;
4653 mono_thread_cleanup_apartment_state (void)
4656 MonoInternalThread* thread = mono_thread_internal_current ();
4658 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4665 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4667 LOCK_THREAD (thread);
4668 thread->state |= state;
4669 UNLOCK_THREAD (thread);
4673 * mono_thread_test_and_set_state:
4674 * Test if current state of \p thread include \p test. If it does not, OR \p set into the state.
4675 * \returns TRUE if \p set was OR'd in.
4678 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4680 LOCK_THREAD (thread);
4682 if ((thread->state & test) != 0) {
4683 UNLOCK_THREAD (thread);
4687 thread->state |= set;
4688 UNLOCK_THREAD (thread);
4694 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4696 LOCK_THREAD (thread);
4697 thread->state &= ~state;
4698 UNLOCK_THREAD (thread);
4702 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4704 gboolean ret = FALSE;
4706 LOCK_THREAD (thread);
4708 if ((thread->state & test) != 0) {
4712 UNLOCK_THREAD (thread);
4718 self_interrupt_thread (void *_unused)
4721 MonoThreadInfo *info;
4723 exc = mono_thread_execute_interruption ();
4725 if (mono_threads_is_coop_enabled ()) {
4726 /* We can return from an async call in coop, as
4727 * it's simply called when exiting the safepoint */
4731 g_error ("%s: we can't resume from an async call", __func__);
4734 info = mono_thread_info_current ();
4736 /* We must use _with_context since we didn't trampoline into the runtime */
4737 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. */
4741 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4745 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4749 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4751 MonoJitInfo **dest = (MonoJitInfo **)data;
4757 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4759 MonoJitInfo *ji = NULL;
4764 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4765 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4766 * where we hold runtime locks.
4768 if (!mono_threads_is_coop_enabled ())
4769 mono_thread_info_set_is_async_context (TRUE);
4770 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4771 if (!mono_threads_is_coop_enabled ())
4772 mono_thread_info_set_is_async_context (FALSE);
4777 MonoInternalThread *thread;
4778 gboolean install_async_abort;
4779 MonoThreadInfoInterruptToken *interrupt_token;
4782 static SuspendThreadResult
4783 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4785 AbortThreadData *data = (AbortThreadData *)ud;
4786 MonoInternalThread *thread = data->thread;
4787 MonoJitInfo *ji = NULL;
4788 gboolean protected_wrapper;
4789 gboolean running_managed;
4791 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4792 return MonoResumeThread;
4794 /*someone is already interrupting it*/
4795 if (!mono_thread_set_interruption_requested (thread))
4796 return MonoResumeThread;
4798 ji = mono_thread_info_get_last_managed (info);
4799 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4800 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4802 if (!protected_wrapper && running_managed) {
4803 /*We are in managed code*/
4804 /*Set the thread to call */
4805 if (data->install_async_abort)
4806 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4807 return MonoResumeThread;
4810 * This will cause waits to be broken.
4811 * It will also prevent the thread from entering a wait, so if the thread returns
4812 * from the wait before it receives the abort signal, it will just spin in the wait
4813 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4816 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4818 return MonoResumeThread;
4823 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4825 AbortThreadData data;
4827 g_assert (thread != mono_thread_internal_current ());
4829 data.thread = thread;
4830 data.install_async_abort = install_async_abort;
4831 data.interrupt_token = NULL;
4833 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4834 if (data.interrupt_token)
4835 mono_thread_info_finish_interrupt (data.interrupt_token);
4836 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4840 self_abort_internal (MonoError *error)
4846 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4847 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4850 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.
4852 exc = mono_thread_request_interruption (TRUE);
4854 mono_error_set_exception_instance (error, exc);
4856 mono_thread_info_self_interrupt ();
4860 MonoInternalThread *thread;
4862 MonoThreadInfoInterruptToken *interrupt_token;
4863 } SuspendThreadData;
4865 static SuspendThreadResult
4866 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4868 SuspendThreadData *data = (SuspendThreadData *)ud;
4869 MonoInternalThread *thread = data->thread;
4870 MonoJitInfo *ji = NULL;
4871 gboolean protected_wrapper;
4872 gboolean running_managed;
4874 ji = mono_thread_info_get_last_managed (info);
4875 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4876 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4878 if (running_managed && !protected_wrapper) {
4879 if (mono_threads_is_coop_enabled ()) {
4880 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4881 return MonoResumeThread;
4883 thread->state &= ~ThreadState_SuspendRequested;
4884 thread->state |= ThreadState_Suspended;
4885 return KeepSuspended;
4888 mono_thread_set_interruption_requested (thread);
4889 if (data->interrupt)
4890 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4892 return MonoResumeThread;
4896 /* LOCKING: called with @thread synch_cs held, and releases it */
4898 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4900 SuspendThreadData data;
4902 g_assert (thread != mono_thread_internal_current ());
4904 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4906 thread->self_suspended = FALSE;
4908 data.thread = thread;
4909 data.interrupt = interrupt;
4910 data.interrupt_token = NULL;
4912 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4913 if (data.interrupt_token)
4914 mono_thread_info_finish_interrupt (data.interrupt_token);
4916 UNLOCK_THREAD (thread);
4919 /* LOCKING: called with @thread synch_cs held, and releases it */
4921 self_suspend_internal (void)
4923 MonoInternalThread *thread;
4925 MonoOSEventWaitRet res;
4927 thread = mono_thread_internal_current ();
4929 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4931 thread->self_suspended = TRUE;
4933 thread->state &= ~ThreadState_SuspendRequested;
4934 thread->state |= ThreadState_Suspended;
4936 UNLOCK_THREAD (thread);
4938 event = thread->suspended;
4941 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4942 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4947 suspend_for_shutdown_async_call (gpointer unused)
4950 mono_thread_info_yield ();
4953 static SuspendThreadResult
4954 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4956 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4957 return MonoResumeThread;
4961 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4963 g_assert (thread != mono_thread_internal_current ());
4965 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4969 * mono_thread_is_foreign:
4970 * \param thread the thread to query
4972 * This function allows one to determine if a thread was created by the mono runtime and has
4973 * a well defined lifecycle or it's a foreign one, created by the native environment.
4975 * \returns TRUE if \p thread was not created by the runtime.
4978 mono_thread_is_foreign (MonoThread *thread)
4980 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4981 return info->runtime_thread == FALSE;
4985 * mono_add_joinable_thread:
4987 * Add TID to the list of joinable threads.
4988 * LOCKING: Acquires the threads lock.
4991 mono_threads_add_joinable_thread (gpointer tid)
4995 * We cannot detach from threads because it causes problems like
4996 * 2fd16f60/r114307. So we collect them and join them when
4997 * we have time (in he finalizer thread).
4999 joinable_threads_lock ();
5000 if (!joinable_threads)
5001 joinable_threads = g_hash_table_new (NULL, NULL);
5002 g_hash_table_insert (joinable_threads, tid, tid);
5003 joinable_thread_count ++;
5004 joinable_threads_unlock ();
5006 mono_gc_finalize_notify ();
5011 * mono_threads_join_threads:
5013 * Join all joinable threads. This is called from the finalizer thread.
5014 * LOCKING: Acquires the threads lock.
5017 mono_threads_join_threads (void)
5020 GHashTableIter iter;
5027 if (!joinable_thread_count)
5031 joinable_threads_lock ();
5033 if (g_hash_table_size (joinable_threads)) {
5034 g_hash_table_iter_init (&iter, joinable_threads);
5035 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5036 thread = (pthread_t)tid;
5037 g_hash_table_remove (joinable_threads, key);
5038 joinable_thread_count --;
5041 joinable_threads_unlock ();
5043 if (thread != pthread_self ()) {
5045 /* This shouldn't block */
5046 mono_threads_join_lock ();
5047 mono_native_thread_join (thread);
5048 mono_threads_join_unlock ();
5061 * Wait for thread TID to exit.
5062 * LOCKING: Acquires the threads lock.
5065 mono_thread_join (gpointer tid)
5069 gboolean found = FALSE;
5071 joinable_threads_lock ();
5072 if (!joinable_threads)
5073 joinable_threads = g_hash_table_new (NULL, NULL);
5074 if (g_hash_table_lookup (joinable_threads, tid)) {
5075 g_hash_table_remove (joinable_threads, tid);
5076 joinable_thread_count --;
5079 joinable_threads_unlock ();
5082 thread = (pthread_t)tid;
5084 mono_native_thread_join (thread);
5090 mono_thread_internal_unhandled_exception (MonoObject* exc)
5092 MonoClass *klass = exc->vtable->klass;
5093 if (is_threadabort_exception (klass)) {
5094 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5095 } else if (!is_appdomainunloaded_exception (klass)
5096 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5097 mono_unhandled_exception (exc);
5098 if (mono_environment_exitcode_get () == 1) {
5099 mono_environment_exitcode_set (255);
5100 mono_invoke_unhandled_exception_hook (exc);
5101 g_assert_not_reached ();
5107 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5110 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5111 mono_error_set_pending_exception (&error);
5115 * mono_threads_attach_coop: called by native->managed wrappers
5118 * - blocking mode: contains gc unsafe transition cookie
5119 * - non-blocking mode: contains random data
5120 * - @return: the original domain which needs to be restored, or NULL.
5123 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5126 MonoThreadInfo *info;
5129 orig = mono_domain_get ();
5132 /* Happens when called from AOTed code which is only used in the root domain. */
5133 domain = mono_get_root_domain ();
5137 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5138 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5139 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5140 * we're only responsible for making the cookie. */
5141 if (mono_threads_is_blocking_transition_enabled ())
5142 external = !(info = mono_thread_info_current_unchecked ()) || !mono_thread_info_is_live (info);
5144 if (!mono_thread_internal_current ()) {
5145 mono_thread_attach_full (domain, FALSE);
5148 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5152 mono_domain_set (domain, TRUE);
5154 if (mono_threads_is_blocking_transition_enabled ()) {
5156 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5157 * return the right cookie. */
5158 *dummy = mono_threads_enter_gc_unsafe_region_cookie ();
5160 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5161 *dummy = mono_threads_enter_gc_unsafe_region (dummy);
5169 * mono_threads_detach_coop: called by native->managed wrappers
5171 * - @cookie: the original domain which needs to be restored, or NULL.
5173 * - blocking mode: contains gc unsafe transition cookie
5174 * - non-blocking mode: contains random data
5177 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5179 MonoDomain *domain, *orig;
5181 orig = (MonoDomain*) cookie;
5183 domain = mono_domain_get ();
5186 if (mono_threads_is_blocking_transition_enabled ()) {
5187 /* it won't do anything if cookie is NULL
5188 * thread state RUNNING -> (RUNNING|BLOCKING) */
5189 mono_threads_exit_gc_unsafe_region (*dummy, dummy);
5192 if (orig != domain) {
5194 mono_domain_unset ();
5196 mono_domain_set (orig, TRUE);
5201 /* Returns TRUE if the current thread is ready to be interrupted. */
5203 mono_threads_is_ready_to_be_interrupted (void)
5205 MonoInternalThread *thread;
5207 thread = mono_thread_internal_current ();
5208 LOCK_THREAD (thread);
5209 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5210 UNLOCK_THREAD (thread);
5214 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5215 UNLOCK_THREAD (thread);
5219 UNLOCK_THREAD (thread);
5225 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5227 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5229 if (internal->thread_info) {
5230 g_string_append (text, ", state : ");
5231 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5234 if (internal->owned_mutexes) {
5237 g_string_append (text, ", owns : [");
5238 for (i = 0; i < internal->owned_mutexes->len; i++)
5239 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5240 g_string_append (text, "]");
5245 mono_thread_internal_is_current (MonoInternalThread *internal)
5247 g_assert (internal);
5248 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));