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 ();
662 internal = thread->internal_thread;
663 internal->handle = mono_threads_open_thread_handle (info->handle);
665 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
667 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
668 internal->thread_info = info;
669 internal->small_id = info->small_id;
671 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
673 SET_CURRENT_OBJECT (internal);
675 domain = mono_object_domain (thread);
677 mono_thread_push_appdomain_ref (domain);
678 if (!mono_domain_set (domain, force_domain)) {
679 mono_thread_pop_appdomain_ref ();
683 mono_threads_lock ();
685 if (threads_starting_up)
686 mono_g_hash_table_remove (threads_starting_up, thread);
688 if (shutting_down && !force_attach) {
689 mono_threads_unlock ();
690 mono_thread_pop_appdomain_ref ();
695 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
698 /* We don't need to duplicate thread->handle, because it is
699 * only closed when the thread object is finalized by the GC. */
700 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
702 /* We have to do this here because mono_thread_start_cb
703 * requires that root_domain_thread is set up. */
704 if (thread_static_info.offset || thread_static_info.idx > 0) {
705 /* get the current allocated size */
706 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
707 mono_alloc_static_data (&internal->static_data, offset, TRUE);
710 mono_threads_unlock ();
712 root_domain = mono_get_root_domain ();
714 g_assert (!internal->root_domain_thread);
715 if (domain != root_domain)
716 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
718 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
720 if (domain != root_domain)
721 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
723 set_current_thread_for_domain (domain, internal, thread);
725 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
733 MonoObject *start_delegate;
734 MonoObject *start_delegate_arg;
735 MonoThreadStart start_func;
736 gpointer start_func_arg;
737 gboolean force_attach;
739 MonoCoopSem registered;
742 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
745 MonoThreadStart start_func;
746 void *start_func_arg;
749 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
753 MonoInternalThread *internal;
754 MonoObject *start_delegate;
755 MonoObject *start_delegate_arg;
758 thread = start_info->thread;
759 internal = thread->internal_thread;
760 domain = mono_object_domain (start_info->thread);
762 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
764 if (!mono_thread_attach_internal (thread, start_info->force_attach, FALSE)) {
765 start_info->failed = TRUE;
767 mono_coop_sem_post (&start_info->registered);
769 if (InterlockedDecrement (&start_info->ref) == 0) {
770 mono_coop_sem_destroy (&start_info->registered);
777 mono_thread_internal_set_priority (internal, internal->priority);
781 start_delegate = start_info->start_delegate;
782 start_delegate_arg = start_info->start_delegate_arg;
783 start_func = start_info->start_func;
784 start_func_arg = start_info->start_func_arg;
786 /* This MUST be called before any managed code can be
787 * executed, as it calls the callback function that (for the
788 * jit) sets the lmf marker.
791 if (mono_thread_start_cb)
792 mono_thread_start_cb (tid, stack_ptr, start_func);
794 /* On 2.0 profile (and higher), set explicitly since state might have been
796 if (internal->apartment_state == ThreadApartmentState_Unknown)
797 internal->apartment_state = ThreadApartmentState_MTA;
799 mono_thread_init_apartment_state ();
801 /* Let the thread that called Start() know we're ready */
802 mono_coop_sem_post (&start_info->registered);
804 if (InterlockedDecrement (&start_info->ref) == 0) {
805 mono_coop_sem_destroy (&start_info->registered);
809 /* start_info is not valid anymore */
813 * Call this after calling start_notify, since the profiler callback might want
814 * to lock the thread, and the lock is held by thread_start () which waits for
817 mono_profiler_thread_start (tid);
819 /* if the name was set before starting, we didn't invoke the profiler callback */
820 if (internal->name) {
821 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
822 mono_profiler_thread_name (internal->tid, tname);
823 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
827 /* start_func is set only for unmanaged start functions */
829 start_func (start_func_arg);
833 g_assert (start_delegate != NULL);
835 /* we may want to handle the exception here. See comment below on unhandled exceptions */
836 args [0] = (gpointer) start_delegate_arg;
837 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
839 if (!mono_error_ok (&error)) {
840 MonoException *ex = mono_error_convert_to_exception (&error);
842 g_assert (ex != NULL);
843 MonoClass *klass = mono_object_get_class (&ex->object);
844 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
845 !is_threadabort_exception (klass)) {
846 mono_unhandled_exception (&ex->object);
847 mono_invoke_unhandled_exception_hook (&ex->object);
848 g_assert_not_reached ();
851 mono_error_cleanup (&error);
855 /* If the thread calls ExitThread at all, this remaining code
856 * will not be executed, but the main thread will eventually
857 * call mono_thread_detach_internal() on this thread's behalf.
860 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
862 /* Do any cleanup needed for apartment state. This
863 * cannot be done in mono_thread_detach_internal since
864 * mono_thread_detach_internal could be called for a
865 * thread other than the current thread.
866 * mono_thread_cleanup_apartment_state cleans up apartment
867 * for the current thead */
868 mono_thread_cleanup_apartment_state ();
870 mono_thread_detach_internal (internal);
878 start_wrapper (gpointer data)
880 StartInfo *start_info;
881 MonoThreadInfo *info;
884 start_info = (StartInfo*) data;
885 g_assert (start_info);
887 info = mono_thread_info_attach ();
888 info->runtime_thread = TRUE;
890 /* Run the actual main function of the thread */
891 res = start_wrapper_internal (start_info, info->stack_end);
893 mono_thread_info_exit (res);
895 g_assert_not_reached ();
901 * Common thread creation code.
902 * LOCKING: Acquires the threads lock.
905 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
906 MonoThreadCreateFlags flags, MonoError *error)
908 StartInfo *start_info = NULL;
909 MonoNativeThreadId tid;
911 gsize stack_set_size;
914 g_assert (!start_func && !start_func_arg);
916 g_assert (!start_delegate);
918 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
919 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
920 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
922 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
923 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
924 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
928 * Join joinable threads to prevent running out of threads since the finalizer
929 * thread might be blocked/backlogged.
931 mono_threads_join_threads ();
935 mono_threads_lock ();
936 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
937 mono_threads_unlock ();
940 if (threads_starting_up == NULL) {
941 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
943 mono_g_hash_table_insert (threads_starting_up, thread, thread);
944 mono_threads_unlock ();
946 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
947 if (internal->threadpool_thread)
948 mono_thread_set_state (internal, ThreadState_Background);
950 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
952 start_info = g_new0 (StartInfo, 1);
954 start_info->thread = thread;
955 start_info->start_delegate = start_delegate;
956 start_info->start_delegate_arg = thread->start_obj;
957 start_info->start_func = start_func;
958 start_info->start_func_arg = start_func_arg;
959 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
960 start_info->failed = FALSE;
961 mono_coop_sem_init (&start_info->registered, 0);
963 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
964 stack_set_size = default_stacksize_for_thread (internal);
968 if (!mono_thread_platform_create_thread (start_wrapper, start_info, &stack_set_size, &tid)) {
969 /* The thread couldn't be created, so set an exception */
970 mono_threads_lock ();
971 mono_g_hash_table_remove (threads_starting_up, thread);
972 mono_threads_unlock ();
973 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
974 /* ref is not going to be decremented in start_wrapper_internal */
975 InterlockedDecrement (&start_info->ref);
980 internal->stack_size = (int) stack_set_size;
982 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
985 * Wait for the thread to set up its TLS data etc, so
986 * theres no potential race condition if someone tries
987 * to look up the data believing the thread has
991 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
993 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));
995 ret = !start_info->failed;
998 if (InterlockedDecrement (&start_info->ref) == 0) {
999 mono_coop_sem_destroy (&start_info->registered);
1000 g_free (start_info);
1007 * mono_thread_new_init:
1010 mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1012 if (mono_thread_start_cb) {
1013 mono_thread_start_cb (tid, stack_start, func);
1018 * mono_threads_set_default_stacksize:
1021 mono_threads_set_default_stacksize (guint32 stacksize)
1023 default_stacksize = stacksize;
1027 * mono_threads_get_default_stacksize:
1030 mono_threads_get_default_stacksize (void)
1032 return default_stacksize;
1036 * mono_thread_create_internal:
1038 * ARG should not be a GC reference.
1041 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1044 MonoInternalThread *internal;
1049 internal = create_internal_thread_object ();
1051 thread = create_thread_object (domain, internal);
1053 LOCK_THREAD (internal);
1055 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1057 UNLOCK_THREAD (internal);
1059 return_val_if_nok (error, NULL);
1064 * mono_thread_create:
1067 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1070 if (!mono_thread_create_checked (domain, func, arg, &error))
1071 mono_error_cleanup (&error);
1075 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1077 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1081 * mono_thread_attach:
1084 mono_thread_attach (MonoDomain *domain)
1086 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1092 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1094 MonoInternalThread *internal;
1096 MonoThreadInfo *info;
1097 MonoNativeThreadId tid;
1099 if (mono_thread_internal_current_is_attached ()) {
1100 if (domain != mono_domain_get ())
1101 mono_domain_set (domain, TRUE);
1102 /* Already attached */
1103 return mono_thread_current ();
1106 info = mono_thread_info_attach ();
1109 tid=mono_native_thread_id_get ();
1111 internal = create_internal_thread_object ();
1113 thread = create_thread_object (domain, internal);
1115 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1116 /* Mono is shutting down, so just wait for the end */
1118 mono_thread_info_sleep (10000, NULL);
1121 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1123 if (mono_thread_attach_cb)
1124 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), info->stack_end);
1126 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1127 if (!mono_thread_info_current ()->tools_thread)
1128 // FIXME: Need a separate callback
1129 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1135 mono_thread_detach_internal (MonoInternalThread *thread)
1139 g_assert (thread != NULL);
1141 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1144 mono_w32mutex_abandon ();
1147 if (thread->abort_state_handle) {
1148 mono_gchandle_free (thread->abort_state_handle);
1149 thread->abort_state_handle = 0;
1152 thread->abort_exc = NULL;
1153 thread->current_appcontext = NULL;
1156 * thread->synch_cs can be NULL if this was called after
1157 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1158 * This can happen only during shutdown.
1159 * The shutting_down flag is not always set, so we can't assert on it.
1161 if (thread->synch_cs)
1162 LOCK_THREAD (thread);
1164 thread->state |= ThreadState_Stopped;
1165 thread->state &= ~ThreadState_Background;
1167 if (thread->synch_cs)
1168 UNLOCK_THREAD (thread);
1171 An interruption request has leaked to cleanup. Adjust the global counter.
1173 This can happen is the abort source thread finds the abortee (this) thread
1174 in unmanaged code. If this thread never trips back to managed code or check
1175 the local flag it will be left set and positively unbalance the global counter.
1177 Leaving the counter unbalanced will cause a performance degradation since all threads
1178 will now keep checking their local flags all the time.
1180 mono_thread_clear_interruption_requested (thread);
1182 mono_threads_lock ();
1186 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1187 /* We have to check whether the thread object for the
1188 * tid is still the same in the table because the
1189 * thread might have been destroyed and the tid reused
1190 * in the meantime, in which case the tid would be in
1191 * the table, but with another thread object.
1195 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1199 mono_threads_unlock ();
1201 /* Don't close the handle here, wait for the object finalizer
1202 * to do it. Otherwise, the following race condition applies:
1204 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1206 * 2) Some other handle is reassigned the same slot
1208 * 3) Another thread tries to join the first thread, and
1209 * blocks waiting for the reassigned handle to be signalled
1210 * (which might never happen). This is possible, because the
1211 * thread calling Join() still has a reference to the first
1215 /* if the thread is not in the hash it has been removed already */
1217 mono_domain_unset ();
1218 mono_memory_barrier ();
1220 if (mono_thread_cleanup_fn)
1221 mono_thread_cleanup_fn (thread_get_tid (thread));
1226 mono_release_type_locks (thread);
1228 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1229 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1230 mono_profiler_thread_end (thread->tid);
1232 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1235 * This will signal async signal handlers that the thread has exited.
1236 * The profiler callback needs this to be set, so it cannot be done earlier.
1238 mono_domain_unset ();
1239 mono_memory_barrier ();
1241 if (thread == mono_thread_internal_current ())
1242 mono_thread_pop_appdomain_ref ();
1244 mono_free_static_data (thread->static_data);
1245 thread->static_data = NULL;
1246 ref_stack_destroy (thread->appdomain_refs);
1247 thread->appdomain_refs = NULL;
1249 g_assert (thread->suspended);
1250 mono_os_event_destroy (thread->suspended);
1251 g_free (thread->suspended);
1252 thread->suspended = NULL;
1254 if (mono_thread_cleanup_fn)
1255 mono_thread_cleanup_fn (thread_get_tid (thread));
1257 mono_memory_barrier ();
1259 if (mono_gc_is_moving ()) {
1260 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1261 thread->thread_pinning_ref = NULL;
1265 SET_CURRENT_OBJECT (NULL);
1266 mono_domain_unset ();
1268 /* Don't need to close the handle to this thread, even though we took a
1269 * reference in mono_thread_attach (), because the GC will do it
1270 * when the Thread object is finalised.
1275 * mono_thread_detach:
1278 mono_thread_detach (MonoThread *thread)
1281 mono_thread_detach_internal (thread->internal_thread);
1285 * mono_thread_detach_if_exiting:
1287 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1288 * This should be used at the end of embedding code which calls into managed code, and which
1289 * can be called from pthread dtors, like <code>dealloc:</code> implementations in Objective-C.
1292 mono_thread_detach_if_exiting (void)
1294 if (mono_thread_info_is_exiting ()) {
1295 MonoInternalThread *thread;
1297 thread = mono_thread_internal_current ();
1299 mono_thread_detach_internal (thread);
1300 mono_thread_info_detach ();
1308 mono_thread_internal_current_is_attached (void)
1310 MonoInternalThread *internal;
1312 internal = GET_CURRENT_OBJECT ();
1323 mono_thread_exit (void)
1325 MonoInternalThread *thread = mono_thread_internal_current ();
1327 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1329 mono_thread_detach_internal (thread);
1331 /* we could add a callback here for embedders to use. */
1332 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1333 exit (mono_environment_exitcode_get ());
1335 mono_thread_info_exit (0);
1339 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1341 MonoInternalThread *internal;
1343 internal = create_internal_thread_object ();
1345 internal->state = ThreadState_Unstarted;
1347 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1351 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1353 return mono_thread_current ();
1357 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1361 MonoInternalThread *internal;
1364 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1366 if (!this_obj->internal_thread)
1367 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1368 internal = this_obj->internal_thread;
1370 LOCK_THREAD (internal);
1372 if ((internal->state & ThreadState_Unstarted) == 0) {
1373 UNLOCK_THREAD (internal);
1374 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1378 if ((internal->state & ThreadState_Aborted) != 0) {
1379 UNLOCK_THREAD (internal);
1383 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1385 mono_error_cleanup (&error);
1386 UNLOCK_THREAD (internal);
1390 internal->state &= ~ThreadState_Unstarted;
1392 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1394 UNLOCK_THREAD (internal);
1395 return internal->handle;
1399 * This is called from the finalizer of the internal thread object.
1402 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1404 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1407 * Since threads keep a reference to their thread object while running, by
1408 * the time this function is called, the thread has already exited/detached,
1409 * i.e. mono_thread_detach_internal () has ran. The exception is during
1410 * shutdown, when mono_thread_detach_internal () can be called after this.
1412 if (this_obj->handle) {
1413 mono_threads_close_thread_handle (this_obj->handle);
1414 this_obj->handle = NULL;
1418 CloseHandle (this_obj->native_handle);
1421 if (this_obj->synch_cs) {
1422 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1423 this_obj->synch_cs = NULL;
1424 mono_coop_mutex_destroy (synch_cs);
1428 if (this_obj->name) {
1429 void *name = this_obj->name;
1430 this_obj->name = NULL;
1436 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1439 MonoInternalThread *thread = mono_thread_internal_current ();
1441 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1443 if (mono_thread_current_check_pending_interrupt ())
1447 gboolean alerted = FALSE;
1449 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1451 res = mono_thread_info_sleep (ms, &alerted);
1453 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1456 MonoException* exc = mono_thread_execute_interruption ();
1458 mono_raise_exception (exc);
1460 // FIXME: !MONO_INFINITE_WAIT
1461 if (ms != MONO_INFINITE_WAIT)
1470 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1475 ves_icall_System_Threading_Thread_GetDomainID (void)
1477 return mono_domain_get()->domain_id;
1481 ves_icall_System_Threading_Thread_Yield (void)
1483 return mono_thread_info_yield ();
1487 * mono_thread_get_name:
1489 * Return the name of the thread. NAME_LEN is set to the length of the name.
1490 * Return NULL if the thread has no name. The returned memory is owned by the
1494 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1498 LOCK_THREAD (this_obj);
1500 if (!this_obj->name) {
1504 *name_len = this_obj->name_len;
1505 res = g_new (gunichar2, this_obj->name_len);
1506 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1509 UNLOCK_THREAD (this_obj);
1515 * mono_thread_get_name_utf8:
1516 * \returns the name of the thread in UTF-8.
1517 * Return NULL if the thread has no name.
1518 * The returned memory is owned by the caller.
1521 mono_thread_get_name_utf8 (MonoThread *thread)
1526 MonoInternalThread *internal = thread->internal_thread;
1527 if (internal == NULL)
1530 LOCK_THREAD (internal);
1532 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1534 UNLOCK_THREAD (internal);
1540 * mono_thread_get_managed_id:
1541 * \returns the \c Thread.ManagedThreadId value of \p thread.
1542 * Returns \c -1 if \p thread is NULL.
1545 mono_thread_get_managed_id (MonoThread *thread)
1550 MonoInternalThread *internal = thread->internal_thread;
1551 if (internal == NULL)
1554 int32_t id = internal->managed_id;
1560 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1565 error_init (&error);
1567 LOCK_THREAD (this_obj);
1569 if (!this_obj->name)
1572 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1574 UNLOCK_THREAD (this_obj);
1576 if (mono_error_set_pending_exception (&error))
1583 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1585 LOCK_THREAD (this_obj);
1590 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1591 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1592 UNLOCK_THREAD (this_obj);
1594 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1597 if (this_obj->name) {
1598 g_free (this_obj->name);
1599 this_obj->name_len = 0;
1602 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1603 this_obj->name_len = mono_string_length (name);
1606 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1609 this_obj->name = NULL;
1612 UNLOCK_THREAD (this_obj);
1614 if (this_obj->name && this_obj->tid) {
1615 char *tname = mono_string_to_utf8_checked (name, error);
1616 return_if_nok (error);
1617 mono_profiler_thread_name (this_obj->tid, tname);
1618 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1624 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1627 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1628 mono_error_set_pending_exception (&error);
1632 * ves_icall_System_Threading_Thread_GetPriority_internal:
1633 * @param this_obj: The MonoInternalThread on which to operate.
1635 * Gets the priority of the given thread.
1636 * @return: The priority of the given thread.
1639 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1642 MonoInternalThread *internal = this_obj->internal_thread;
1644 LOCK_THREAD (internal);
1645 priority = internal->priority;
1646 UNLOCK_THREAD (internal);
1652 * ves_icall_System_Threading_Thread_SetPriority_internal:
1653 * @param this_obj: The MonoInternalThread on which to operate.
1654 * @param priority: The priority to set.
1656 * Sets the priority of the given thread.
1659 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1661 MonoInternalThread *internal = this_obj->internal_thread;
1663 LOCK_THREAD (internal);
1664 internal->priority = priority;
1665 if (internal->thread_info != NULL)
1666 mono_thread_internal_set_priority (internal, priority);
1667 UNLOCK_THREAD (internal);
1670 /* If the array is already in the requested domain, we just return it,
1671 otherwise we return a copy in that domain. */
1673 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1681 if (mono_object_domain (arr) == domain)
1684 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1685 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1690 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1693 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1694 mono_error_set_pending_exception (&error);
1699 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1702 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1703 mono_error_set_pending_exception (&error);
1708 * mono_thread_current:
1711 mono_thread_current (void)
1713 MonoDomain *domain = mono_domain_get ();
1714 MonoInternalThread *internal = mono_thread_internal_current ();
1715 MonoThread **current_thread_ptr;
1717 g_assert (internal);
1718 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1720 if (!*current_thread_ptr) {
1721 g_assert (domain != mono_get_root_domain ());
1722 *current_thread_ptr = create_thread_object (domain, internal);
1724 return *current_thread_ptr;
1727 /* Return the thread object belonging to INTERNAL in the current domain */
1729 mono_thread_current_for_thread (MonoInternalThread *internal)
1731 MonoDomain *domain = mono_domain_get ();
1732 MonoThread **current_thread_ptr;
1734 g_assert (internal);
1735 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1737 if (!*current_thread_ptr) {
1738 g_assert (domain != mono_get_root_domain ());
1739 *current_thread_ptr = create_thread_object (domain, internal);
1741 return *current_thread_ptr;
1745 mono_thread_internal_current (void)
1747 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1748 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1752 static MonoThreadInfoWaitRet
1753 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1756 MonoThreadInfoWaitRet ret;
1763 start = (ms == -1) ? 0 : mono_msec_ticks ();
1766 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1769 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1772 exc = mono_thread_execute_interruption ();
1774 mono_error_set_exception_instance (error, exc);
1781 /* Re-calculate ms according to the time passed */
1782 diff_ms = (gint32)(mono_msec_ticks () - start);
1783 if (diff_ms >= ms) {
1784 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1787 wait = ms - diff_ms;
1794 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1796 MonoInternalThread *thread = this_obj->internal_thread;
1797 MonoThreadHandle *handle = thread->handle;
1798 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1802 if (mono_thread_current_check_pending_interrupt ())
1805 LOCK_THREAD (thread);
1807 if ((thread->state & ThreadState_Unstarted) != 0) {
1808 UNLOCK_THREAD (thread);
1810 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1814 UNLOCK_THREAD (thread);
1817 ms=MONO_INFINITE_WAIT;
1819 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1821 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1823 ret=mono_join_uninterrupted (handle, ms, &error);
1825 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1827 mono_error_set_pending_exception (&error);
1829 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1830 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1835 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1840 #define MANAGED_WAIT_FAILED 0x7fffffff
1843 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1845 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1846 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1847 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1848 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1849 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1850 return WAIT_IO_COMPLETION;
1851 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1852 return WAIT_TIMEOUT;
1853 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1854 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1855 return MANAGED_WAIT_FAILED;
1857 g_error ("%s: unknown val value %d", __func__, val);
1861 static MonoW32HandleWaitRet
1862 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1865 MonoW32HandleWaitRet ret;
1872 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1876 if (numhandles != 1)
1877 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1879 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1881 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1882 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1883 #endif /* HOST_WIN32 */
1886 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1889 exc = mono_thread_execute_interruption ();
1891 mono_error_set_exception_instance (error, exc);
1898 /* Re-calculate ms according to the time passed */
1899 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1900 if (diff_ms >= ms) {
1901 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1904 wait = ms - diff_ms;
1910 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1915 MonoW32HandleWaitRet ret;
1917 MonoObject *waitHandle;
1918 MonoInternalThread *thread = mono_thread_internal_current ();
1920 /* Do this WaitSleepJoin check before creating objects */
1921 if (mono_thread_current_check_pending_interrupt ())
1922 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1924 /* We fail in managed if the array has more than 64 elements */
1925 numhandles = (guint32)mono_array_length(mono_handles);
1926 handles = g_new0(HANDLE, numhandles);
1928 for(i = 0; i < numhandles; i++) {
1929 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1930 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1934 ms=MONO_INFINITE_WAIT;
1937 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1939 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1941 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1945 mono_error_set_pending_exception (&error);
1947 return map_native_wait_result_to_managed (ret, numhandles);
1950 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1953 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1954 uintptr_t numhandles;
1955 MonoW32HandleWaitRet ret;
1957 MonoObject *waitHandle;
1958 MonoInternalThread *thread = mono_thread_internal_current ();
1960 /* Do this WaitSleepJoin check before creating objects */
1961 if (mono_thread_current_check_pending_interrupt ())
1962 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1964 numhandles = mono_array_length(mono_handles);
1965 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1966 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1968 for(i = 0; i < numhandles; i++) {
1969 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1970 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1974 ms=MONO_INFINITE_WAIT;
1977 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1979 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1981 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1983 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1985 mono_error_set_pending_exception (&error);
1987 return map_native_wait_result_to_managed (ret, numhandles);
1990 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1993 MonoW32HandleWaitRet ret;
1994 MonoInternalThread *thread = mono_thread_internal_current ();
1996 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1999 ms=MONO_INFINITE_WAIT;
2002 if (mono_thread_current_check_pending_interrupt ())
2003 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2005 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2007 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
2009 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2011 mono_error_set_pending_exception (&error);
2012 return map_native_wait_result_to_managed (ret, 1);
2016 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
2018 MonoW32HandleWaitRet ret;
2019 MonoInternalThread *thread = mono_thread_internal_current ();
2022 ms = MONO_INFINITE_WAIT;
2024 if (mono_thread_current_check_pending_interrupt ())
2025 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2027 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2031 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
2033 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
2037 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2039 return map_native_wait_result_to_managed (ret, 1);
2042 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2044 return InterlockedIncrement (location);
2047 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2049 #if SIZEOF_VOID_P == 4
2050 if (G_UNLIKELY ((size_t)location & 0x7)) {
2052 mono_interlocked_lock ();
2055 mono_interlocked_unlock ();
2059 return InterlockedIncrement64 (location);
2062 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2064 return InterlockedDecrement(location);
2067 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2069 #if SIZEOF_VOID_P == 4
2070 if (G_UNLIKELY ((size_t)location & 0x7)) {
2072 mono_interlocked_lock ();
2075 mono_interlocked_unlock ();
2079 return InterlockedDecrement64 (location);
2082 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2084 return InterlockedExchange(location, value);
2087 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2090 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2091 mono_gc_wbarrier_generic_nostore (location);
2095 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2097 return InterlockedExchangePointer(location, value);
2100 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2102 IntFloatUnion val, ret;
2105 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2111 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2113 #if SIZEOF_VOID_P == 4
2114 if (G_UNLIKELY ((size_t)location & 0x7)) {
2116 mono_interlocked_lock ();
2119 mono_interlocked_unlock ();
2123 return InterlockedExchange64 (location, value);
2127 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2129 LongDoubleUnion val, ret;
2132 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2137 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2139 return InterlockedCompareExchange(location, value, comparand);
2142 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2144 gint32 r = InterlockedCompareExchange(location, value, comparand);
2145 *success = r == comparand;
2149 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2152 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2153 mono_gc_wbarrier_generic_nostore (location);
2157 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2159 return InterlockedCompareExchangePointer(location, value, comparand);
2162 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2164 IntFloatUnion val, ret, cmp;
2167 cmp.fval = comparand;
2168 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2174 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2176 #if SIZEOF_VOID_P == 8
2177 LongDoubleUnion val, comp, ret;
2180 comp.fval = comparand;
2181 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2187 mono_interlocked_lock ();
2189 if (old == comparand)
2191 mono_interlocked_unlock ();
2198 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2200 #if SIZEOF_VOID_P == 4
2201 if (G_UNLIKELY ((size_t)location & 0x7)) {
2203 mono_interlocked_lock ();
2205 if (old == comparand)
2207 mono_interlocked_unlock ();
2211 return InterlockedCompareExchange64 (location, value, comparand);
2215 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2218 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2219 mono_gc_wbarrier_generic_nostore (location);
2224 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2227 MONO_CHECK_NULL (location, NULL);
2228 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2229 mono_gc_wbarrier_generic_nostore (location);
2234 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2236 return InterlockedAdd (location, value);
2240 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2242 #if SIZEOF_VOID_P == 4
2243 if (G_UNLIKELY ((size_t)location & 0x7)) {
2245 mono_interlocked_lock ();
2248 mono_interlocked_unlock ();
2252 return InterlockedAdd64 (location, value);
2256 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2258 #if SIZEOF_VOID_P == 4
2259 if (G_UNLIKELY ((size_t)location & 0x7)) {
2261 mono_interlocked_lock ();
2263 mono_interlocked_unlock ();
2267 return InterlockedRead64 (location);
2271 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2273 mono_memory_barrier ();
2277 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2279 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2281 if (state & ThreadState_Background) {
2282 /* If the thread changes the background mode, the main thread has to
2283 * be notified, since it has to rebuild the list of threads to
2286 mono_os_event_set (&background_change_event);
2291 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2293 mono_thread_set_state (this_obj, (MonoThreadState)state);
2295 if (state & ThreadState_Background) {
2296 /* If the thread changes the background mode, the main thread has to
2297 * be notified, since it has to rebuild the list of threads to
2300 mono_os_event_set (&background_change_event);
2305 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2309 LOCK_THREAD (this_obj);
2311 state = this_obj->state;
2313 UNLOCK_THREAD (this_obj);
2318 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2320 MonoInternalThread *current;
2322 MonoInternalThread *thread = this_obj->internal_thread;
2324 LOCK_THREAD (thread);
2326 current = mono_thread_internal_current ();
2328 thread->thread_interrupt_requested = TRUE;
2329 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2331 UNLOCK_THREAD (thread);
2334 async_abort_internal (thread, FALSE);
2339 * mono_thread_current_check_pending_interrupt:
2340 * Checks if there's a interruption request and set the pending exception if so.
2341 * \returns true if a pending exception was set
2344 mono_thread_current_check_pending_interrupt (void)
2346 MonoInternalThread *thread = mono_thread_internal_current ();
2347 gboolean throw_ = FALSE;
2349 LOCK_THREAD (thread);
2351 if (thread->thread_interrupt_requested) {
2353 thread->thread_interrupt_requested = FALSE;
2356 UNLOCK_THREAD (thread);
2359 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2364 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2366 LOCK_THREAD (thread);
2368 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2370 UNLOCK_THREAD (thread);
2374 if ((thread->state & ThreadState_Unstarted) != 0) {
2375 thread->state |= ThreadState_Aborted;
2376 UNLOCK_THREAD (thread);
2380 thread->state |= ThreadState_AbortRequested;
2381 if (thread->abort_state_handle)
2382 mono_gchandle_free (thread->abort_state_handle);
2384 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2385 g_assert (thread->abort_state_handle);
2387 thread->abort_state_handle = 0;
2389 thread->abort_exc = NULL;
2391 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));
2393 /* During shutdown, we can't wait for other threads */
2395 /* Make sure the thread is awake */
2396 mono_thread_resume (thread);
2398 UNLOCK_THREAD (thread);
2403 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2405 if (!request_thread_abort (thread, state))
2408 if (thread == mono_thread_internal_current ()) {
2410 self_abort_internal (&error);
2411 mono_error_set_pending_exception (&error);
2413 async_abort_internal (thread, TRUE);
2418 * mono_thread_internal_abort:
2419 * Request thread \p thread to be aborted.
2420 * \p thread MUST NOT be the current thread.
2423 mono_thread_internal_abort (MonoInternalThread *thread)
2425 g_assert (thread != mono_thread_internal_current ());
2427 if (!request_thread_abort (thread, NULL))
2429 async_abort_internal (thread, TRUE);
2433 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2435 MonoInternalThread *thread = mono_thread_internal_current ();
2436 gboolean was_aborting;
2438 LOCK_THREAD (thread);
2439 was_aborting = thread->state & ThreadState_AbortRequested;
2440 thread->state &= ~ThreadState_AbortRequested;
2441 UNLOCK_THREAD (thread);
2443 if (!was_aborting) {
2444 const char *msg = "Unable to reset abort because no abort was requested";
2445 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2449 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2450 thread->abort_exc = NULL;
2451 if (thread->abort_state_handle) {
2452 mono_gchandle_free (thread->abort_state_handle);
2453 /* This is actually not necessary - the handle
2454 only counts if the exception is set */
2455 thread->abort_state_handle = 0;
2460 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2462 LOCK_THREAD (thread);
2464 thread->state &= ~ThreadState_AbortRequested;
2466 if (thread->abort_exc) {
2467 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2468 thread->abort_exc = NULL;
2469 if (thread->abort_state_handle) {
2470 mono_gchandle_free (thread->abort_state_handle);
2471 /* This is actually not necessary - the handle
2472 only counts if the exception is set */
2473 thread->abort_state_handle = 0;
2477 UNLOCK_THREAD (thread);
2481 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2484 MonoInternalThread *thread = this_obj->internal_thread;
2485 MonoObject *state, *deserialized = NULL;
2488 if (!thread->abort_state_handle)
2491 state = mono_gchandle_get_target (thread->abort_state_handle);
2494 domain = mono_domain_get ();
2495 if (mono_object_domain (state) == domain)
2498 deserialized = mono_object_xdomain_representation (state, domain, &error);
2500 if (!deserialized) {
2501 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2502 if (!is_ok (&error)) {
2503 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2504 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2506 mono_set_pending_exception (invalid_op_exc);
2510 return deserialized;
2514 mono_thread_suspend (MonoInternalThread *thread)
2516 LOCK_THREAD (thread);
2518 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2520 UNLOCK_THREAD (thread);
2524 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2526 UNLOCK_THREAD (thread);
2530 thread->state |= ThreadState_SuspendRequested;
2531 mono_os_event_reset (thread->suspended);
2533 if (thread == mono_thread_internal_current ()) {
2534 /* calls UNLOCK_THREAD (thread) */
2535 self_suspend_internal ();
2537 /* calls UNLOCK_THREAD (thread) */
2538 async_suspend_internal (thread, FALSE);
2545 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2547 if (!mono_thread_suspend (this_obj->internal_thread)) {
2548 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2553 /* LOCKING: LOCK_THREAD(thread) must be held */
2555 mono_thread_resume (MonoInternalThread *thread)
2557 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2558 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2559 thread->state &= ~ThreadState_SuspendRequested;
2560 mono_os_event_set (thread->suspended);
2564 if ((thread->state & ThreadState_Suspended) == 0 ||
2565 (thread->state & ThreadState_Unstarted) != 0 ||
2566 (thread->state & ThreadState_Aborted) != 0 ||
2567 (thread->state & ThreadState_Stopped) != 0)
2569 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2573 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2575 mono_os_event_set (thread->suspended);
2577 if (!thread->self_suspended) {
2578 UNLOCK_THREAD (thread);
2580 /* Awake the thread */
2581 if (!mono_thread_info_resume (thread_get_tid (thread)))
2584 LOCK_THREAD (thread);
2587 thread->state &= ~ThreadState_Suspended;
2593 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2595 if (!thread->internal_thread) {
2596 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2598 LOCK_THREAD (thread->internal_thread);
2599 if (!mono_thread_resume (thread->internal_thread))
2600 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2601 UNLOCK_THREAD (thread->internal_thread);
2606 mono_threads_is_critical_method (MonoMethod *method)
2608 switch (method->wrapper_type) {
2609 case MONO_WRAPPER_RUNTIME_INVOKE:
2610 case MONO_WRAPPER_XDOMAIN_INVOKE:
2611 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2618 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2623 if (mono_threads_is_critical_method (m)) {
2624 *((gboolean*)data) = TRUE;
2631 is_running_protected_wrapper (void)
2633 gboolean found = FALSE;
2634 mono_stack_walk (find_wrapper, &found);
2642 mono_thread_stop (MonoThread *thread)
2644 MonoInternalThread *internal = thread->internal_thread;
2646 if (!request_thread_abort (internal, NULL))
2649 if (internal == mono_thread_internal_current ()) {
2651 self_abort_internal (&error);
2653 This function is part of the embeding API and has no way to return the exception
2654 to be thrown. So what we do is keep the old behavior and raise the exception.
2656 mono_error_raise_exception (&error); /* OK to throw, see note */
2658 async_abort_internal (internal, TRUE);
2663 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2665 gint8 tmp = *(volatile gint8 *)ptr;
2666 mono_memory_barrier ();
2671 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2673 gint16 tmp = *(volatile gint16 *)ptr;
2674 mono_memory_barrier ();
2679 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2681 gint32 tmp = *(volatile gint32 *)ptr;
2682 mono_memory_barrier ();
2687 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2689 gint64 tmp = *(volatile gint64 *)ptr;
2690 mono_memory_barrier ();
2695 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2697 volatile void *tmp = *(volatile void **)ptr;
2698 mono_memory_barrier ();
2699 return (void *) tmp;
2703 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2705 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2706 mono_memory_barrier ();
2707 return (MonoObject *) tmp;
2711 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2713 double tmp = *(volatile double *)ptr;
2714 mono_memory_barrier ();
2719 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2721 float tmp = *(volatile float *)ptr;
2722 mono_memory_barrier ();
2727 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2729 return InterlockedRead8 ((volatile gint8 *)ptr);
2733 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2735 return InterlockedRead16 ((volatile gint16 *)ptr);
2739 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2741 return InterlockedRead ((volatile gint32 *)ptr);
2745 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2747 #if SIZEOF_VOID_P == 4
2748 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2750 mono_interlocked_lock ();
2751 val = *(gint64*)ptr;
2752 mono_interlocked_unlock ();
2756 return InterlockedRead64 ((volatile gint64 *)ptr);
2760 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2762 return InterlockedReadPointer ((volatile gpointer *)ptr);
2766 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2770 #if SIZEOF_VOID_P == 4
2771 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2773 mono_interlocked_lock ();
2774 val = *(double*)ptr;
2775 mono_interlocked_unlock ();
2780 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2786 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2790 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2796 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2798 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2802 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2804 mono_memory_barrier ();
2805 *(volatile gint8 *)ptr = value;
2809 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2811 mono_memory_barrier ();
2812 *(volatile gint16 *)ptr = value;
2816 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2818 mono_memory_barrier ();
2819 *(volatile gint32 *)ptr = value;
2823 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2825 mono_memory_barrier ();
2826 *(volatile gint64 *)ptr = value;
2830 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2832 mono_memory_barrier ();
2833 *(volatile void **)ptr = value;
2837 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2839 mono_memory_barrier ();
2840 mono_gc_wbarrier_generic_store (ptr, value);
2844 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2846 mono_memory_barrier ();
2847 *(volatile double *)ptr = value;
2851 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2853 mono_memory_barrier ();
2854 *(volatile float *)ptr = value;
2858 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2860 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2864 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2866 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2870 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2872 InterlockedWrite ((volatile gint32 *)ptr, value);
2876 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2878 #if SIZEOF_VOID_P == 4
2879 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2880 mono_interlocked_lock ();
2881 *(gint64*)ptr = value;
2882 mono_interlocked_unlock ();
2887 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2891 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2893 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2897 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2901 #if SIZEOF_VOID_P == 4
2902 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2903 mono_interlocked_lock ();
2904 *(double*)ptr = value;
2905 mono_interlocked_unlock ();
2912 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2916 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2922 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2926 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2928 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2932 free_context (void *user_data)
2934 ContextStaticData *data = user_data;
2936 mono_threads_lock ();
2939 * There is no guarantee that, by the point this reference queue callback
2940 * has been invoked, the GC handle associated with the object will fail to
2941 * resolve as one might expect. So if we don't free and remove the GC
2942 * handle here, free_context_static_data_helper () could end up resolving
2943 * a GC handle to an actually-dead context which would contain a pointer
2944 * to an already-freed static data segment, resulting in a crash when
2947 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2949 mono_threads_unlock ();
2951 mono_gchandle_free (data->gc_handle);
2952 mono_free_static_data (data->static_data);
2957 mono_threads_register_app_context (MonoAppContext *ctx, MonoError *error)
2960 mono_threads_lock ();
2962 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2965 contexts = g_hash_table_new (NULL, NULL);
2968 context_queue = mono_gc_reference_queue_new (free_context);
2970 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2971 g_hash_table_insert (contexts, gch, gch);
2974 * We use this intermediate structure to contain a duplicate pointer to
2975 * the static data because we can't rely on being able to resolve the GC
2976 * handle in the reference queue callback.
2978 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2979 data->gc_handle = GPOINTER_TO_UINT (gch);
2982 context_adjust_static_data (ctx);
2983 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2985 mono_threads_unlock ();
2987 mono_profiler_context_loaded (ctx);
2991 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContextHandle ctx, MonoError *error)
2994 mono_threads_register_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_register_app_context */
2998 mono_threads_release_app_context (MonoAppContext* ctx, MonoError *error)
3001 * NOTE: Since finalizers are unreliable for the purposes of ensuring
3002 * cleanup in exceptional circumstances, we don't actually do any
3003 * cleanup work here. We instead do this via a reference queue.
3006 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
3008 mono_profiler_context_unloaded (ctx);
3012 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContextHandle ctx, MonoError *error)
3015 mono_threads_release_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_release_app_context */
3018 void mono_thread_init (MonoThreadStartCB start_cb,
3019 MonoThreadAttachCB attach_cb)
3021 mono_coop_mutex_init_recursive (&threads_mutex);
3023 mono_os_mutex_init_recursive(&interlocked_mutex);
3024 mono_os_mutex_init_recursive(&joinable_threads_mutex);
3026 mono_os_event_init (&background_change_event, FALSE);
3028 mono_init_static_data_info (&thread_static_info);
3029 mono_init_static_data_info (&context_static_info);
3031 mono_thread_start_cb = start_cb;
3032 mono_thread_attach_cb = attach_cb;
3036 * mono_thread_cleanup:
3039 mono_thread_cleanup (void)
3041 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3042 /* The main thread must abandon any held mutexes (particularly
3043 * important for named mutexes as they are shared across
3044 * processes, see bug 74680.) This will happen when the
3045 * thread exits, but if it's not running in a subthread it
3046 * won't exit in time.
3048 mono_w32mutex_abandon ();
3052 /* This stuff needs more testing, it seems one of these
3053 * critical sections can be locked when mono_thread_cleanup is
3056 mono_coop_mutex_destroy (&threads_mutex);
3057 mono_os_mutex_destroy (&interlocked_mutex);
3058 mono_os_mutex_destroy (&delayed_free_table_mutex);
3059 mono_os_mutex_destroy (&small_id_mutex);
3060 mono_os_event_destroy (&background_change_event);
3065 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3067 mono_thread_cleanup_fn = func;
3071 * mono_thread_set_manage_callback:
3074 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3076 thread->internal_thread->manage_callback = func;
3080 static void print_tids (gpointer key, gpointer value, gpointer user)
3082 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3083 * sizeof(uint) and a cast to uint would overflow
3085 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3086 * print this as a pointer.
3088 g_message ("Waiting for: %p", key);
3093 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3094 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3099 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3102 MonoThreadInfoWaitRet ret;
3104 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3106 /* Add the thread state change event, so it wakes
3107 * up if a thread changes to background mode. */
3110 if (check_state_change)
3111 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3113 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3116 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3117 /* See the comment in build_wait_tids() */
3118 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3122 for( i = 0; i < wait->num; i++)
3123 mono_threads_close_thread_handle (wait->handles [i]);
3125 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3128 if (ret < wait->num) {
3129 MonoInternalThread *internal;
3131 internal = wait->threads [ret];
3133 mono_threads_lock ();
3134 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3135 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3136 mono_threads_unlock ();
3140 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3142 struct wait_data *wait=(struct wait_data *)user;
3144 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3145 MonoInternalThread *thread=(MonoInternalThread *)value;
3147 /* Ignore background threads, we abort them later */
3148 /* Do not lock here since it is not needed and the caller holds threads_lock */
3149 if (thread->state & ThreadState_Background) {
3150 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3151 return; /* just leave, ignore */
3154 if (mono_gc_is_finalizer_internal_thread (thread)) {
3155 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3159 if (thread == mono_thread_internal_current ()) {
3160 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3164 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3165 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3169 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3170 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3174 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3175 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3176 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3177 wait->threads[wait->num]=thread;
3180 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3182 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3187 /* Just ignore the rest, we can't do anything with
3194 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3196 struct wait_data *wait=(struct wait_data *)user;
3197 MonoNativeThreadId self = mono_native_thread_id_get ();
3198 MonoInternalThread *thread = (MonoInternalThread *)value;
3200 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3203 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3205 if (mono_gc_is_finalizer_internal_thread (thread))
3208 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3209 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3210 wait->threads[wait->num] = thread;
3213 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3214 mono_thread_internal_abort (thread);
3221 * mono_threads_set_shutting_down:
3223 * Is called by a thread that wants to shut down Mono. If the runtime is already
3224 * shutting down, the calling thread is suspended/stopped, and this function never
3228 mono_threads_set_shutting_down (void)
3230 MonoInternalThread *current_thread = mono_thread_internal_current ();
3232 mono_threads_lock ();
3234 if (shutting_down) {
3235 mono_threads_unlock ();
3237 /* Make sure we're properly suspended/stopped */
3239 LOCK_THREAD (current_thread);
3241 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3242 UNLOCK_THREAD (current_thread);
3243 mono_thread_execute_interruption ();
3245 UNLOCK_THREAD (current_thread);
3248 /*since we're killing the thread, detach it.*/
3249 mono_thread_detach_internal (current_thread);
3251 /* Wake up other threads potentially waiting for us */
3252 mono_thread_info_exit (0);
3254 shutting_down = TRUE;
3256 /* Not really a background state change, but this will
3257 * interrupt the main thread if it is waiting for all
3258 * the other threads.
3260 mono_os_event_set (&background_change_event);
3262 mono_threads_unlock ();
3267 * mono_thread_manage:
3270 mono_thread_manage (void)
3272 struct wait_data wait_data;
3273 struct wait_data *wait = &wait_data;
3275 memset (wait, 0, sizeof (struct wait_data));
3276 /* join each thread that's still running */
3277 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3279 mono_threads_lock ();
3281 THREAD_DEBUG (g_message("%s: No threads", __func__));
3282 mono_threads_unlock ();
3285 mono_threads_unlock ();
3288 mono_threads_lock ();
3289 if (shutting_down) {
3290 /* somebody else is shutting down */
3291 mono_threads_unlock ();
3294 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3295 mono_g_hash_table_foreach (threads, print_tids, NULL));
3297 mono_os_event_reset (&background_change_event);
3299 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3300 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3301 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3302 mono_threads_unlock ();
3304 /* Something to wait for */
3305 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3306 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3307 } while(wait->num>0);
3309 /* Mono is shutting down, so just wait for the end */
3310 if (!mono_runtime_try_shutdown ()) {
3311 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3312 mono_thread_suspend (mono_thread_internal_current ());
3313 mono_thread_execute_interruption ();
3317 * Remove everything but the finalizer thread and self.
3318 * Also abort all the background threads
3321 mono_threads_lock ();
3324 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3325 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3326 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3328 mono_threads_unlock ();
3330 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3331 if (wait->num > 0) {
3332 /* Something to wait for */
3333 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3335 } while (wait->num > 0);
3338 * give the subthreads a chance to really quit (this is mainly needed
3339 * to get correct user and system times from getrusage/wait/time(1)).
3340 * This could be removed if we avoid pthread_detach() and use pthread_join().
3342 mono_thread_info_yield ();
3346 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3348 MonoInternalThread *thread = (MonoInternalThread*)value;
3349 struct wait_data *wait = (struct wait_data*)user_data;
3352 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3354 * This needs no locking.
3356 if ((thread->state & ThreadState_Suspended) != 0 ||
3357 (thread->state & ThreadState_Stopped) != 0)
3360 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3361 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3362 wait->threads [wait->num] = thread;
3368 * mono_thread_suspend_all_other_threads:
3370 * Suspend all managed threads except the finalizer thread and this thread. It is
3371 * not possible to resume them later.
3373 void mono_thread_suspend_all_other_threads (void)
3375 struct wait_data wait_data;
3376 struct wait_data *wait = &wait_data;
3378 MonoNativeThreadId self = mono_native_thread_id_get ();
3379 guint32 eventidx = 0;
3380 gboolean starting, finished;
3382 memset (wait, 0, sizeof (struct wait_data));
3384 * The other threads could be in an arbitrary state at this point, i.e.
3385 * they could be starting up, shutting down etc. This means that there could be
3386 * threads which are not even in the threads hash table yet.
3390 * First we set a barrier which will be checked by all threads before they
3391 * are added to the threads hash table, and they will exit if the flag is set.
3392 * This ensures that no threads could be added to the hash later.
3393 * We will use shutting_down as the barrier for now.
3395 g_assert (shutting_down);
3398 * We make multiple calls to WaitForMultipleObjects since:
3399 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3400 * - some threads could exit without becoming suspended
3405 * Make a copy of the hashtable since we can't do anything with
3406 * threads while threads_mutex is held.
3409 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3410 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3411 mono_threads_lock ();
3412 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3413 mono_threads_unlock ();
3416 /* Get the suspended events that we'll be waiting for */
3417 for (i = 0; i < wait->num; ++i) {
3418 MonoInternalThread *thread = wait->threads [i];
3420 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3421 || mono_gc_is_finalizer_internal_thread (thread)
3422 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3424 mono_threads_close_thread_handle (wait->handles [i]);
3425 wait->threads [i] = NULL;
3429 LOCK_THREAD (thread);
3431 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3432 UNLOCK_THREAD (thread);
3433 mono_threads_close_thread_handle (wait->handles [i]);
3434 wait->threads [i] = NULL;
3440 /* Convert abort requests into suspend requests */
3441 if ((thread->state & ThreadState_AbortRequested) != 0)
3442 thread->state &= ~ThreadState_AbortRequested;
3444 thread->state |= ThreadState_SuspendRequested;
3445 mono_os_event_reset (thread->suspended);
3447 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3448 async_suspend_internal (thread, TRUE);
3450 mono_threads_close_thread_handle (wait->handles [i]);
3451 wait->threads [i] = NULL;
3453 if (eventidx <= 0) {
3455 * If there are threads which are starting up, we wait until they
3456 * are suspended when they try to register in the threads hash.
3457 * This is guaranteed to finish, since the threads which can create new
3458 * threads get suspended after a while.
3459 * FIXME: The finalizer thread can still create new threads.
3461 mono_threads_lock ();
3462 if (threads_starting_up)
3463 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3466 mono_threads_unlock ();
3468 mono_thread_info_sleep (100, NULL);
3476 MonoInternalThread *thread;
3477 MonoStackFrameInfo *frames;
3478 int nframes, max_frames;
3479 int nthreads, max_threads;
3480 MonoInternalThread **threads;
3481 } ThreadDumpUserData;
3483 static gboolean thread_dump_requested;
3485 /* This needs to be async safe */
3487 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3489 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3491 if (ud->nframes < ud->max_frames) {
3492 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3499 /* This needs to be async safe */
3500 static SuspendThreadResult
3501 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3503 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3504 MonoInternalThread *thread = user_data->thread;
3507 /* This no longer works with remote unwinding */
3508 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3509 mono_thread_internal_describe (thread, text);
3510 g_string_append (text, "\n");
3513 if (thread == mono_thread_internal_current ())
3514 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3516 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3518 return MonoResumeThread;
3522 int nthreads, max_threads;
3523 MonoInternalThread **threads;
3524 } CollectThreadsUserData;
3527 collect_thread (gpointer key, gpointer value, gpointer user)
3529 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3530 MonoInternalThread *thread = (MonoInternalThread *)value;
3532 if (ud->nthreads < ud->max_threads)
3533 ud->threads [ud->nthreads ++] = thread;
3537 * Collect running threads into the THREADS array.
3538 * THREADS should be an array allocated on the stack.
3541 collect_threads (MonoInternalThread **thread_array, int max_threads)
3543 CollectThreadsUserData ud;
3545 memset (&ud, 0, sizeof (ud));
3546 /* This array contains refs, but its on the stack, so its ok */
3547 ud.threads = thread_array;
3548 ud.max_threads = max_threads;
3550 mono_threads_lock ();
3551 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3552 mono_threads_unlock ();
3558 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3560 GString* text = g_string_new (0);
3562 GError *error = NULL;
3565 ud->thread = thread;
3568 /* Collect frames for the thread */
3569 if (thread == mono_thread_internal_current ()) {
3570 get_thread_dump (mono_thread_info_current (), ud);
3572 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3576 * Do all the non async-safe work outside of get_thread_dump.
3579 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3581 g_string_append_printf (text, "\n\"%s\"", name);
3584 else if (thread->threadpool_thread) {
3585 g_string_append (text, "\n\"<threadpool thread>\"");
3587 g_string_append (text, "\n\"<unnamed thread>\"");
3590 for (i = 0; i < ud->nframes; ++i) {
3591 MonoStackFrameInfo *frame = &ud->frames [i];
3592 MonoMethod *method = NULL;
3594 if (frame->type == FRAME_TYPE_MANAGED)
3595 method = mono_jit_info_get_method (frame->ji);
3598 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3599 g_string_append_printf (text, " %s\n", location);
3602 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3606 fprintf (stdout, "%s", text->str);
3608 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3609 OutputDebugStringA(text->str);
3612 g_string_free (text, TRUE);
3617 mono_threads_perform_thread_dump (void)
3619 ThreadDumpUserData ud;
3620 MonoInternalThread *thread_array [128];
3621 int tindex, nthreads;
3623 if (!thread_dump_requested)
3626 printf ("Full thread dump:\n");
3628 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3629 nthreads = collect_threads (thread_array, 128);
3631 memset (&ud, 0, sizeof (ud));
3632 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3633 ud.max_frames = 256;
3635 for (tindex = 0; tindex < nthreads; ++tindex)
3636 dump_thread (thread_array [tindex], &ud);
3640 thread_dump_requested = FALSE;
3643 /* Obtain the thread dump of all threads */
3645 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3648 ThreadDumpUserData ud;
3649 MonoInternalThread *thread_array [128];
3650 MonoDomain *domain = mono_domain_get ();
3651 MonoDebugSourceLocation *location;
3652 int tindex, nthreads;
3656 *out_threads = NULL;
3657 *out_stack_frames = NULL;
3659 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3660 nthreads = collect_threads (thread_array, 128);
3662 memset (&ud, 0, sizeof (ud));
3663 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3664 ud.max_frames = 256;
3666 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3669 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3673 for (tindex = 0; tindex < nthreads; ++tindex) {
3674 MonoInternalThread *thread = thread_array [tindex];
3675 MonoArray *thread_frames;
3681 /* Collect frames for the thread */
3682 if (thread == mono_thread_internal_current ()) {
3683 get_thread_dump (mono_thread_info_current (), &ud);
3685 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3688 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3690 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3693 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3695 for (i = 0; i < ud.nframes; ++i) {
3696 MonoStackFrameInfo *frame = &ud.frames [i];
3697 MonoMethod *method = NULL;
3698 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3702 sf->native_offset = frame->native_offset;
3704 if (frame->type == FRAME_TYPE_MANAGED)
3705 method = mono_jit_info_get_method (frame->ji);
3708 sf->method_address = (gsize) frame->ji->code_start;
3710 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3713 MONO_OBJECT_SETREF (sf, method, rm);
3715 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3717 sf->il_offset = location->il_offset;
3719 if (location && location->source_file) {
3720 MonoString *filename = mono_string_new_checked (domain, location->source_file, error);
3723 MONO_OBJECT_SETREF (sf, filename, filename);
3724 sf->line = location->row;
3725 sf->column = location->column;
3727 mono_debug_free_source_location (location);
3732 mono_array_setref (thread_frames, i, sf);
3738 return is_ok (error);
3742 * mono_threads_request_thread_dump:
3744 * Ask all threads except the current to print their stacktrace to stdout.
3747 mono_threads_request_thread_dump (void)
3749 /*The new thread dump code runs out of the finalizer thread. */
3750 thread_dump_requested = TRUE;
3751 mono_gc_finalize_notify ();
3756 gint allocated; /* +1 so that refs [allocated] == NULL */
3760 typedef struct ref_stack RefStack;
3763 ref_stack_new (gint initial_size)
3767 initial_size = MAX (initial_size, 16) + 1;
3768 rs = g_new0 (RefStack, 1);
3769 rs->refs = g_new0 (gpointer, initial_size);
3770 rs->allocated = initial_size;
3775 ref_stack_destroy (gpointer ptr)
3777 RefStack *rs = (RefStack *)ptr;
3786 ref_stack_push (RefStack *rs, gpointer ptr)
3788 g_assert (rs != NULL);
3790 if (rs->bottom >= rs->allocated) {
3791 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3792 rs->allocated <<= 1;
3793 rs->refs [rs->allocated] = NULL;
3795 rs->refs [rs->bottom++] = ptr;
3799 ref_stack_pop (RefStack *rs)
3801 if (rs == NULL || rs->bottom == 0)
3805 rs->refs [rs->bottom] = NULL;
3809 ref_stack_find (RefStack *rs, gpointer ptr)
3816 for (refs = rs->refs; refs && *refs; refs++) {
3824 * mono_thread_push_appdomain_ref:
3826 * Register that the current thread may have references to objects in domain
3827 * @domain on its stack. Each call to this function should be paired with a
3828 * call to pop_appdomain_ref.
3831 mono_thread_push_appdomain_ref (MonoDomain *domain)
3833 MonoInternalThread *thread = mono_thread_internal_current ();
3836 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3837 SPIN_LOCK (thread->lock_thread_id);
3838 if (thread->appdomain_refs == NULL)
3839 thread->appdomain_refs = ref_stack_new (16);
3840 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3841 SPIN_UNLOCK (thread->lock_thread_id);
3846 mono_thread_pop_appdomain_ref (void)
3848 MonoInternalThread *thread = mono_thread_internal_current ();
3851 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3852 SPIN_LOCK (thread->lock_thread_id);
3853 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3854 SPIN_UNLOCK (thread->lock_thread_id);
3859 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3862 SPIN_LOCK (thread->lock_thread_id);
3863 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3864 SPIN_UNLOCK (thread->lock_thread_id);
3869 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3871 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3874 typedef struct abort_appdomain_data {
3875 struct wait_data wait;
3877 } abort_appdomain_data;
3880 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3882 MonoInternalThread *thread = (MonoInternalThread*)value;
3883 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3884 MonoDomain *domain = data->domain;
3886 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3887 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3889 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3890 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3891 data->wait.threads [data->wait.num] = thread;
3894 /* Just ignore the rest, we can't do anything with
3902 * mono_threads_abort_appdomain_threads:
3904 * Abort threads which has references to the given appdomain.
3907 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3909 abort_appdomain_data user_data;
3911 int orig_timeout = timeout;
3914 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3916 start_time = mono_msec_ticks ();
3918 mono_threads_lock ();
3920 user_data.domain = domain;
3921 user_data.wait.num = 0;
3922 /* This shouldn't take any locks */
3923 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3924 mono_threads_unlock ();
3926 if (user_data.wait.num > 0) {
3927 /* Abort the threads outside the threads lock */
3928 for (i = 0; i < user_data.wait.num; ++i)
3929 mono_thread_internal_abort (user_data.wait.threads [i]);
3932 * We should wait for the threads either to abort, or to leave the
3933 * domain. We can't do the latter, so we wait with a timeout.
3935 wait_for_tids (&user_data.wait, 100, FALSE);
3938 /* Update remaining time */
3939 timeout -= mono_msec_ticks () - start_time;
3940 start_time = mono_msec_ticks ();
3942 if (orig_timeout != -1 && timeout < 0)
3945 while (user_data.wait.num > 0);
3947 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3953 * mono_thread_get_undeniable_exception:
3955 * Return an exception which needs to be raised when leaving a catch clause.
3956 * This is used for undeniable exception propagation.
3959 mono_thread_get_undeniable_exception (void)
3961 MonoInternalThread *thread = mono_thread_internal_current ();
3963 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3966 // We don't want to have our exception effect calls made by
3967 // the catching block
3969 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3973 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3974 * exception if the thread no longer references a dying appdomain.
3976 thread->abort_exc->trace_ips = NULL;
3977 thread->abort_exc->stack_trace = NULL;
3978 return thread->abort_exc;
3981 #if MONO_SMALL_CONFIG
3982 #define NUM_STATIC_DATA_IDX 4
3983 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3987 #define NUM_STATIC_DATA_IDX 8
3988 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3989 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3993 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3994 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3997 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3999 gpointer *static_data = (gpointer *)addr;
4001 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
4002 void **ptr = (void **)static_data [i];
4007 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4008 void **p = ptr + idx;
4011 mark_func ((MonoObject**)p, gc_data);
4017 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4019 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4023 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4025 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4029 * mono_alloc_static_data
4031 * Allocate memory blocks for storing threads or context static data
4034 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4036 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4039 gpointer* static_data = *static_data_ptr;
4041 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4042 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4044 if (mono_gc_user_markers_supported ()) {
4045 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4046 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4048 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4049 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4052 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4053 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4054 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4055 *static_data_ptr = static_data;
4056 static_data [0] = static_data;
4059 for (i = 1; i <= idx; ++i) {
4060 if (static_data [i])
4063 if (mono_gc_user_markers_supported ())
4064 static_data [i] = g_malloc0 (static_data_size [i]);
4066 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4067 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4068 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4073 mono_free_static_data (gpointer* static_data)
4076 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4077 gpointer p = static_data [i];
4081 * At this point, the static data pointer array is still registered with the
4082 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4083 * data. Freeing the individual arrays without first nulling their slots
4084 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4085 * such an already freed array. See bug #13813.
4087 static_data [i] = NULL;
4088 mono_memory_write_barrier ();
4089 if (mono_gc_user_markers_supported ())
4092 mono_gc_free_fixed (p);
4094 mono_gc_free_fixed (static_data);
4098 * mono_init_static_data_info
4100 * Initializes static data counters
4102 static void mono_init_static_data_info (StaticDataInfo *static_data)
4104 static_data->idx = 0;
4105 static_data->offset = 0;
4106 static_data->freelist = NULL;
4110 * mono_alloc_static_data_slot
4112 * Generates an offset for static data. static_data contains the counters
4113 * used to generate it.
4116 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4118 if (!static_data->idx && !static_data->offset) {
4120 * we use the first chunk of the first allocation also as
4121 * an array for the rest of the data
4123 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4125 static_data->offset += align - 1;
4126 static_data->offset &= ~(align - 1);
4127 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4128 static_data->idx ++;
4129 g_assert (size <= static_data_size [static_data->idx]);
4130 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4131 static_data->offset = 0;
4133 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4134 static_data->offset += size;
4139 * LOCKING: requires that threads_mutex is held
4142 context_adjust_static_data (MonoAppContext *ctx)
4144 if (context_static_info.offset || context_static_info.idx > 0) {
4145 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4146 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4147 ctx->data->static_data = ctx->static_data;
4152 * LOCKING: requires that threads_mutex is held
4155 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4157 MonoInternalThread *thread = (MonoInternalThread *)value;
4158 guint32 offset = GPOINTER_TO_UINT (user);
4160 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4164 * LOCKING: requires that threads_mutex is held
4167 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4169 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4174 guint32 offset = GPOINTER_TO_UINT (user);
4175 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4176 ctx->data->static_data = ctx->static_data;
4179 static StaticDataFreeList*
4180 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4182 StaticDataFreeList* prev = NULL;
4183 StaticDataFreeList* tmp = static_data->freelist;
4185 if (tmp->size == size) {
4187 prev->next = tmp->next;
4189 static_data->freelist = tmp->next;
4198 #if SIZEOF_VOID_P == 4
4205 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4207 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4209 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4210 MonoBitSet *rb = sets [idx];
4211 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4212 offset /= sizeof (uintptr_t);
4213 /* offset is now the bitmap offset */
4214 for (int i = 0; i < numbits; ++i) {
4215 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4216 mono_bitset_set_fast (rb, offset + i);
4221 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4223 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4224 MonoBitSet *rb = sets [idx];
4225 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4226 offset /= sizeof (uintptr_t);
4227 /* offset is now the bitmap offset */
4228 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4229 mono_bitset_clear_fast (rb, offset + i);
4233 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4235 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4237 StaticDataInfo *info;
4240 if (static_type == SPECIAL_STATIC_THREAD) {
4241 info = &thread_static_info;
4242 sets = thread_reference_bitmaps;
4244 info = &context_static_info;
4245 sets = context_reference_bitmaps;
4248 mono_threads_lock ();
4250 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4254 offset = item->offset;
4257 offset = mono_alloc_static_data_slot (info, size, align);
4260 update_reference_bitmap (sets, offset, bitmap, numbits);
4262 if (static_type == SPECIAL_STATIC_THREAD) {
4263 /* This can be called during startup */
4264 if (threads != NULL)
4265 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4267 if (contexts != NULL)
4268 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4270 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4273 mono_threads_unlock ();
4279 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4281 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4283 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4284 return get_thread_static_data (thread, offset);
4286 return get_context_static_data (thread->current_appcontext, offset);
4291 mono_get_special_static_data (guint32 offset)
4293 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4302 * LOCKING: requires that threads_mutex is held
4305 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4307 MonoInternalThread *thread = (MonoInternalThread *)value;
4308 OffsetSize *data = (OffsetSize *)user;
4309 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4310 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4313 if (!thread->static_data || !thread->static_data [idx])
4315 ptr = ((char*) thread->static_data [idx]) + off;
4316 mono_gc_bzero_atomic (ptr, data->size);
4320 * LOCKING: requires that threads_mutex is held
4323 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4325 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4330 OffsetSize *data = (OffsetSize *)user;
4331 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4332 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4335 if (!ctx->static_data || !ctx->static_data [idx])
4338 ptr = ((char*) ctx->static_data [idx]) + off;
4339 mono_gc_bzero_atomic (ptr, data->size);
4343 do_free_special_slot (guint32 offset, guint32 size)
4345 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4347 StaticDataInfo *info;
4349 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4350 info = &thread_static_info;
4351 sets = thread_reference_bitmaps;
4353 info = &context_static_info;
4354 sets = context_reference_bitmaps;
4357 guint32 data_offset = offset;
4358 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4359 OffsetSize data = { data_offset, size };
4361 clear_reference_bitmap (sets, data.offset, data.size);
4363 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4364 if (threads != NULL)
4365 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4367 if (contexts != NULL)
4368 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4371 if (!mono_runtime_is_shutting_down ()) {
4372 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4374 item->offset = offset;
4377 item->next = info->freelist;
4378 info->freelist = item;
4383 do_free_special (gpointer key, gpointer value, gpointer data)
4385 MonoClassField *field = (MonoClassField *)key;
4386 guint32 offset = GPOINTER_TO_UINT (value);
4389 size = mono_type_size (field->type, &align);
4390 do_free_special_slot (offset, size);
4394 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4396 mono_threads_lock ();
4398 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4400 mono_threads_unlock ();
4404 static void CALLBACK dummy_apc (ULONG_PTR param)
4410 * mono_thread_execute_interruption
4412 * Performs the operation that the requested thread state requires (abort,
4415 static MonoException*
4416 mono_thread_execute_interruption (void)
4418 MonoInternalThread *thread = mono_thread_internal_current ();
4419 MonoThread *sys_thread = mono_thread_current ();
4421 LOCK_THREAD (thread);
4423 /* MonoThread::interruption_requested can only be changed with atomics */
4424 if (!mono_thread_clear_interruption_requested (thread)) {
4425 UNLOCK_THREAD (thread);
4429 /* this will consume pending APC calls */
4431 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4433 /* Clear the interrupted flag of the thread so it can wait again */
4434 mono_thread_info_clear_self_interrupt ();
4436 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4437 if (sys_thread->pending_exception) {
4440 exc = sys_thread->pending_exception;
4441 sys_thread->pending_exception = NULL;
4443 UNLOCK_THREAD (thread);
4445 } else if (thread->state & (ThreadState_AbortRequested)) {
4446 UNLOCK_THREAD (thread);
4447 g_assert (sys_thread->pending_exception == NULL);
4448 if (thread->abort_exc == NULL) {
4450 * This might be racy, but it has to be called outside the lock
4451 * since it calls managed code.
4453 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4455 return thread->abort_exc;
4456 } else if (thread->state & (ThreadState_SuspendRequested)) {
4457 /* calls UNLOCK_THREAD (thread) */
4458 self_suspend_internal ();
4460 } else if (thread->thread_interrupt_requested) {
4462 thread->thread_interrupt_requested = FALSE;
4463 UNLOCK_THREAD (thread);
4465 return(mono_get_exception_thread_interrupted ());
4468 UNLOCK_THREAD (thread);
4474 * mono_thread_request_interruption
4476 * A signal handler can call this method to request the interruption of a
4477 * thread. The result of the interruption will depend on the current state of
4478 * the thread. If the result is an exception that needs to be throw, it is
4479 * provided as return value.
4482 mono_thread_request_interruption (gboolean running_managed)
4484 MonoInternalThread *thread = mono_thread_internal_current ();
4486 /* The thread may already be stopping */
4490 if (!mono_thread_set_interruption_requested (thread))
4493 if (!running_managed || is_running_protected_wrapper ()) {
4494 /* Can't stop while in unmanaged code. Increase the global interruption
4495 request count. When exiting the unmanaged method the count will be
4496 checked and the thread will be interrupted. */
4498 /* this will awake the thread if it is in WaitForSingleObject
4500 /* Our implementation of this function ignores the func argument */
4502 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4504 mono_thread_info_self_interrupt ();
4509 return mono_thread_execute_interruption ();
4513 /*This function should be called by a thread after it has exited all of
4514 * its handle blocks at interruption time.*/
4516 mono_thread_resume_interruption (gboolean exec)
4518 MonoInternalThread *thread = mono_thread_internal_current ();
4519 gboolean still_aborting;
4521 /* The thread may already be stopping */
4525 LOCK_THREAD (thread);
4526 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4527 UNLOCK_THREAD (thread);
4529 /*This can happen if the protected block called Thread::ResetAbort*/
4530 if (!still_aborting)
4533 if (!mono_thread_set_interruption_requested (thread))
4536 mono_thread_info_self_interrupt ();
4539 return mono_thread_execute_interruption ();
4544 gboolean mono_thread_interruption_requested ()
4546 if (thread_interruption_requested) {
4547 MonoInternalThread *thread = mono_thread_internal_current ();
4548 /* The thread may already be stopping */
4550 return mono_thread_get_interruption_requested (thread);
4555 static MonoException*
4556 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4558 MonoInternalThread *thread = mono_thread_internal_current ();
4560 /* The thread may already be stopping */
4563 if (!mono_thread_get_interruption_requested (thread))
4565 if (!bypass_abort_protection && is_running_protected_wrapper ())
4568 return mono_thread_execute_interruption ();
4572 * Performs the interruption of the current thread, if one has been requested,
4573 * and the thread is not running a protected wrapper.
4574 * Return the exception which needs to be thrown, if any.
4577 mono_thread_interruption_checkpoint (void)
4579 return mono_thread_interruption_checkpoint_request (FALSE);
4583 * Performs the interruption of the current thread, if one has been requested.
4584 * Return the exception which needs to be thrown, if any.
4587 mono_thread_force_interruption_checkpoint_noraise (void)
4589 return mono_thread_interruption_checkpoint_request (TRUE);
4593 * mono_set_pending_exception:
4595 * Set the pending exception of the current thread to EXC.
4596 * The exception will be thrown when execution returns to managed code.
4599 mono_set_pending_exception (MonoException *exc)
4601 MonoThread *thread = mono_thread_current ();
4603 /* The thread may already be stopping */
4607 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4609 mono_thread_request_interruption (FALSE);
4613 * mono_thread_interruption_request_flag:
4615 * Returns the address of a flag that will be non-zero if an interruption has
4616 * been requested for a thread. The thread to interrupt may not be the current
4617 * thread, so an additional call to mono_thread_interruption_requested() or
4618 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4621 gint32* mono_thread_interruption_request_flag ()
4623 return &thread_interruption_requested;
4627 mono_thread_init_apartment_state (void)
4630 MonoInternalThread* thread = mono_thread_internal_current ();
4632 /* Positive return value indicates success, either
4633 * S_OK if this is first CoInitialize call, or
4634 * S_FALSE if CoInitialize already called, but with same
4635 * threading model. A negative value indicates failure,
4636 * probably due to trying to change the threading model.
4638 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4639 ? COINIT_APARTMENTTHREADED
4640 : COINIT_MULTITHREADED) < 0) {
4641 thread->apartment_state = ThreadApartmentState_Unknown;
4647 mono_thread_cleanup_apartment_state (void)
4650 MonoInternalThread* thread = mono_thread_internal_current ();
4652 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4659 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4661 LOCK_THREAD (thread);
4662 thread->state |= state;
4663 UNLOCK_THREAD (thread);
4667 * mono_thread_test_and_set_state:
4668 * Test if current state of \p thread include \p test. If it does not, OR \p set into the state.
4669 * \returns TRUE if \p set was OR'd in.
4672 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4674 LOCK_THREAD (thread);
4676 if ((thread->state & test) != 0) {
4677 UNLOCK_THREAD (thread);
4681 thread->state |= set;
4682 UNLOCK_THREAD (thread);
4688 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4690 LOCK_THREAD (thread);
4691 thread->state &= ~state;
4692 UNLOCK_THREAD (thread);
4696 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4698 gboolean ret = FALSE;
4700 LOCK_THREAD (thread);
4702 if ((thread->state & test) != 0) {
4706 UNLOCK_THREAD (thread);
4712 self_interrupt_thread (void *_unused)
4715 MonoThreadInfo *info;
4717 exc = mono_thread_execute_interruption ();
4719 if (mono_threads_is_coop_enabled ()) {
4720 /* We can return from an async call in coop, as
4721 * it's simply called when exiting the safepoint */
4725 g_error ("%s: we can't resume from an async call", __func__);
4728 info = mono_thread_info_current ();
4730 /* We must use _with_context since we didn't trampoline into the runtime */
4731 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. */
4735 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4739 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4743 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4745 MonoJitInfo **dest = (MonoJitInfo **)data;
4751 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4753 MonoJitInfo *ji = NULL;
4758 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4759 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4760 * where we hold runtime locks.
4762 if (!mono_threads_is_coop_enabled ())
4763 mono_thread_info_set_is_async_context (TRUE);
4764 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4765 if (!mono_threads_is_coop_enabled ())
4766 mono_thread_info_set_is_async_context (FALSE);
4771 MonoInternalThread *thread;
4772 gboolean install_async_abort;
4773 MonoThreadInfoInterruptToken *interrupt_token;
4776 static SuspendThreadResult
4777 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4779 AbortThreadData *data = (AbortThreadData *)ud;
4780 MonoInternalThread *thread = data->thread;
4781 MonoJitInfo *ji = NULL;
4782 gboolean protected_wrapper;
4783 gboolean running_managed;
4785 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4786 return MonoResumeThread;
4788 /*someone is already interrupting it*/
4789 if (!mono_thread_set_interruption_requested (thread))
4790 return MonoResumeThread;
4792 ji = mono_thread_info_get_last_managed (info);
4793 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4794 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4796 if (!protected_wrapper && running_managed) {
4797 /*We are in managed code*/
4798 /*Set the thread to call */
4799 if (data->install_async_abort)
4800 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4801 return MonoResumeThread;
4804 * This will cause waits to be broken.
4805 * It will also prevent the thread from entering a wait, so if the thread returns
4806 * from the wait before it receives the abort signal, it will just spin in the wait
4807 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4810 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4812 return MonoResumeThread;
4817 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4819 AbortThreadData data;
4821 g_assert (thread != mono_thread_internal_current ());
4823 data.thread = thread;
4824 data.install_async_abort = install_async_abort;
4825 data.interrupt_token = NULL;
4827 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4828 if (data.interrupt_token)
4829 mono_thread_info_finish_interrupt (data.interrupt_token);
4830 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4834 self_abort_internal (MonoError *error)
4840 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4841 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4844 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.
4846 exc = mono_thread_request_interruption (TRUE);
4848 mono_error_set_exception_instance (error, exc);
4850 mono_thread_info_self_interrupt ();
4854 MonoInternalThread *thread;
4856 MonoThreadInfoInterruptToken *interrupt_token;
4857 } SuspendThreadData;
4859 static SuspendThreadResult
4860 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4862 SuspendThreadData *data = (SuspendThreadData *)ud;
4863 MonoInternalThread *thread = data->thread;
4864 MonoJitInfo *ji = NULL;
4865 gboolean protected_wrapper;
4866 gboolean running_managed;
4868 ji = mono_thread_info_get_last_managed (info);
4869 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4870 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4872 if (running_managed && !protected_wrapper) {
4873 if (mono_threads_is_coop_enabled ()) {
4874 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4875 return MonoResumeThread;
4877 thread->state &= ~ThreadState_SuspendRequested;
4878 thread->state |= ThreadState_Suspended;
4879 return KeepSuspended;
4882 mono_thread_set_interruption_requested (thread);
4883 if (data->interrupt)
4884 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4886 return MonoResumeThread;
4890 /* LOCKING: called with @thread synch_cs held, and releases it */
4892 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4894 SuspendThreadData data;
4896 g_assert (thread != mono_thread_internal_current ());
4898 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4900 thread->self_suspended = FALSE;
4902 data.thread = thread;
4903 data.interrupt = interrupt;
4904 data.interrupt_token = NULL;
4906 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4907 if (data.interrupt_token)
4908 mono_thread_info_finish_interrupt (data.interrupt_token);
4910 UNLOCK_THREAD (thread);
4913 /* LOCKING: called with @thread synch_cs held, and releases it */
4915 self_suspend_internal (void)
4917 MonoInternalThread *thread;
4919 MonoOSEventWaitRet res;
4921 thread = mono_thread_internal_current ();
4923 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4925 thread->self_suspended = TRUE;
4927 thread->state &= ~ThreadState_SuspendRequested;
4928 thread->state |= ThreadState_Suspended;
4930 UNLOCK_THREAD (thread);
4932 event = thread->suspended;
4935 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4936 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4941 suspend_for_shutdown_async_call (gpointer unused)
4944 mono_thread_info_yield ();
4947 static SuspendThreadResult
4948 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4950 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4951 return MonoResumeThread;
4955 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4957 g_assert (thread != mono_thread_internal_current ());
4959 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4963 * mono_thread_is_foreign:
4964 * \param thread the thread to query
4966 * This function allows one to determine if a thread was created by the mono runtime and has
4967 * a well defined lifecycle or it's a foreign one, created by the native environment.
4969 * \returns TRUE if \p thread was not created by the runtime.
4972 mono_thread_is_foreign (MonoThread *thread)
4974 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4975 return info->runtime_thread == FALSE;
4979 * mono_add_joinable_thread:
4981 * Add TID to the list of joinable threads.
4982 * LOCKING: Acquires the threads lock.
4985 mono_threads_add_joinable_thread (gpointer tid)
4989 * We cannot detach from threads because it causes problems like
4990 * 2fd16f60/r114307. So we collect them and join them when
4991 * we have time (in he finalizer thread).
4993 joinable_threads_lock ();
4994 if (!joinable_threads)
4995 joinable_threads = g_hash_table_new (NULL, NULL);
4996 g_hash_table_insert (joinable_threads, tid, tid);
4997 joinable_thread_count ++;
4998 joinable_threads_unlock ();
5000 mono_gc_finalize_notify ();
5005 * mono_threads_join_threads:
5007 * Join all joinable threads. This is called from the finalizer thread.
5008 * LOCKING: Acquires the threads lock.
5011 mono_threads_join_threads (void)
5014 GHashTableIter iter;
5021 if (!joinable_thread_count)
5025 joinable_threads_lock ();
5027 if (g_hash_table_size (joinable_threads)) {
5028 g_hash_table_iter_init (&iter, joinable_threads);
5029 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5030 thread = (pthread_t)tid;
5031 g_hash_table_remove (joinable_threads, key);
5032 joinable_thread_count --;
5035 joinable_threads_unlock ();
5037 if (thread != pthread_self ()) {
5039 /* This shouldn't block */
5040 mono_threads_join_lock ();
5041 mono_native_thread_join (thread);
5042 mono_threads_join_unlock ();
5055 * Wait for thread TID to exit.
5056 * LOCKING: Acquires the threads lock.
5059 mono_thread_join (gpointer tid)
5063 gboolean found = FALSE;
5065 joinable_threads_lock ();
5066 if (!joinable_threads)
5067 joinable_threads = g_hash_table_new (NULL, NULL);
5068 if (g_hash_table_lookup (joinable_threads, tid)) {
5069 g_hash_table_remove (joinable_threads, tid);
5070 joinable_thread_count --;
5073 joinable_threads_unlock ();
5076 thread = (pthread_t)tid;
5078 mono_native_thread_join (thread);
5084 mono_thread_internal_unhandled_exception (MonoObject* exc)
5086 MonoClass *klass = exc->vtable->klass;
5087 if (is_threadabort_exception (klass)) {
5088 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5089 } else if (!is_appdomainunloaded_exception (klass)
5090 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5091 mono_unhandled_exception (exc);
5092 if (mono_environment_exitcode_get () == 1) {
5093 mono_environment_exitcode_set (255);
5094 mono_invoke_unhandled_exception_hook (exc);
5095 g_assert_not_reached ();
5101 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5104 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5105 mono_error_set_pending_exception (&error);
5109 * mono_threads_attach_coop: called by native->managed wrappers
5113 * - @return: the original domain which needs to be restored, or NULL.
5116 * - @dummy: contains the original domain
5117 * - @return: a cookie containing current MonoThreadInfo*.
5120 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5123 gboolean fresh_thread = FALSE;
5126 /* Happens when called from AOTed code which is only used in the root domain. */
5127 domain = mono_get_root_domain ();
5132 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5133 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5134 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5135 * we're only responsible for making the cookie. */
5136 if (mono_threads_is_coop_enabled ()) {
5137 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5138 fresh_thread = !info || !mono_thread_info_is_live (info);
5141 if (!mono_thread_internal_current ()) {
5142 mono_thread_attach_full (domain, FALSE);
5145 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5148 orig = mono_domain_get ();
5150 mono_domain_set (domain, TRUE);
5152 if (!mono_threads_is_coop_enabled ())
5153 return orig != domain ? orig : NULL;
5157 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5158 * return the right cookie. */
5159 return mono_threads_enter_gc_unsafe_region_cookie ();
5162 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5163 return mono_threads_enter_gc_unsafe_region (dummy);
5168 * mono_threads_detach_coop: called by native->managed wrappers
5171 * - @cookie: the original domain which needs to be restored, or NULL.
5175 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5176 * - @dummy: contains the original domain
5179 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5181 MonoDomain *domain, *orig;
5183 if (!mono_threads_is_coop_enabled ()) {
5184 orig = (MonoDomain*) cookie;
5186 mono_domain_set (orig, TRUE);
5188 orig = (MonoDomain*) *dummy;
5190 domain = mono_domain_get ();
5193 /* it won't do anything if cookie is NULL
5194 * thread state RUNNING -> (RUNNING|BLOCKING) */
5195 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5197 if (orig != domain) {
5199 mono_domain_unset ();
5201 mono_domain_set (orig, TRUE);
5207 /* Returns TRUE if the current thread is ready to be interrupted. */
5209 mono_threads_is_ready_to_be_interrupted (void)
5211 MonoInternalThread *thread;
5213 thread = mono_thread_internal_current ();
5214 LOCK_THREAD (thread);
5215 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5216 UNLOCK_THREAD (thread);
5220 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5221 UNLOCK_THREAD (thread);
5225 UNLOCK_THREAD (thread);
5231 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5233 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5235 if (internal->thread_info) {
5236 g_string_append (text, ", state : ");
5237 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5240 if (internal->owned_mutexes) {
5243 g_string_append (text, ", owns : [");
5244 for (i = 0; i < internal->owned_mutexes->len; i++)
5245 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5246 g_string_append (text, "]");
5251 mono_thread_internal_is_current (MonoInternalThread *internal)
5253 g_assert (internal);
5254 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));