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);
1862 ves_icall_System_Threading_WaitHandle_Wait_internal (gpointer *handles, gint32 numhandles, MonoBoolean waitall, gint32 timeout, MonoError *error)
1864 MonoW32HandleWaitRet ret;
1865 MonoInternalThread *thread;
1868 guint32 timeoutLeft;
1870 /* Do this WaitSleepJoin check before creating objects */
1871 if (mono_thread_current_check_pending_interrupt ())
1872 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1874 thread = mono_thread_internal_current ();
1876 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1879 timeout = MONO_INFINITE_WAIT;
1880 if (timeout != MONO_INFINITE_WAIT)
1881 start = mono_msec_ticks ();
1883 timeoutLeft = timeout;
1888 if (numhandles != 1)
1889 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, timeoutLeft, TRUE), numhandles);
1891 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], timeoutLeft, TRUE), 1);
1893 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1894 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, timeoutLeft, TRUE);
1895 #endif /* HOST_WIN32 */
1898 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1901 exc = mono_thread_execute_interruption ();
1903 mono_error_set_exception_instance (error, exc);
1907 if (timeout != MONO_INFINITE_WAIT) {
1910 elapsed = mono_msec_ticks () - start;
1911 if (elapsed >= timeout) {
1912 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1916 timeoutLeft = timeout - elapsed;
1920 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1922 return map_native_wait_result_to_managed (ret, numhandles);
1926 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (gpointer toSignal, gpointer toWait, gint32 ms, MonoError *error)
1928 MonoW32HandleWaitRet ret;
1929 MonoInternalThread *thread = mono_thread_internal_current ();
1932 ms = MONO_INFINITE_WAIT;
1934 if (mono_thread_current_check_pending_interrupt ())
1935 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1937 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1941 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
1943 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
1947 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1949 return map_native_wait_result_to_managed (ret, 1);
1952 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1954 return InterlockedIncrement (location);
1957 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1959 #if SIZEOF_VOID_P == 4
1960 if (G_UNLIKELY ((size_t)location & 0x7)) {
1962 mono_interlocked_lock ();
1965 mono_interlocked_unlock ();
1969 return InterlockedIncrement64 (location);
1972 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1974 return InterlockedDecrement(location);
1977 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1979 #if SIZEOF_VOID_P == 4
1980 if (G_UNLIKELY ((size_t)location & 0x7)) {
1982 mono_interlocked_lock ();
1985 mono_interlocked_unlock ();
1989 return InterlockedDecrement64 (location);
1992 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
1994 return InterlockedExchange(location, value);
1997 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2000 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2001 mono_gc_wbarrier_generic_nostore (location);
2005 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2007 return InterlockedExchangePointer(location, value);
2010 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2012 IntFloatUnion val, ret;
2015 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2021 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2023 #if SIZEOF_VOID_P == 4
2024 if (G_UNLIKELY ((size_t)location & 0x7)) {
2026 mono_interlocked_lock ();
2029 mono_interlocked_unlock ();
2033 return InterlockedExchange64 (location, value);
2037 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2039 LongDoubleUnion val, ret;
2042 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2047 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2049 return InterlockedCompareExchange(location, value, comparand);
2052 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2054 gint32 r = InterlockedCompareExchange(location, value, comparand);
2055 *success = r == comparand;
2059 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2062 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2063 mono_gc_wbarrier_generic_nostore (location);
2067 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2069 return InterlockedCompareExchangePointer(location, value, comparand);
2072 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2074 IntFloatUnion val, ret, cmp;
2077 cmp.fval = comparand;
2078 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2084 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2086 #if SIZEOF_VOID_P == 8
2087 LongDoubleUnion val, comp, ret;
2090 comp.fval = comparand;
2091 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2097 mono_interlocked_lock ();
2099 if (old == comparand)
2101 mono_interlocked_unlock ();
2108 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2110 #if SIZEOF_VOID_P == 4
2111 if (G_UNLIKELY ((size_t)location & 0x7)) {
2113 mono_interlocked_lock ();
2115 if (old == comparand)
2117 mono_interlocked_unlock ();
2121 return InterlockedCompareExchange64 (location, value, comparand);
2125 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2128 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2129 mono_gc_wbarrier_generic_nostore (location);
2134 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2137 MONO_CHECK_NULL (location, NULL);
2138 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2139 mono_gc_wbarrier_generic_nostore (location);
2144 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2146 return InterlockedAdd (location, value);
2150 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2152 #if SIZEOF_VOID_P == 4
2153 if (G_UNLIKELY ((size_t)location & 0x7)) {
2155 mono_interlocked_lock ();
2158 mono_interlocked_unlock ();
2162 return InterlockedAdd64 (location, value);
2166 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2168 #if SIZEOF_VOID_P == 4
2169 if (G_UNLIKELY ((size_t)location & 0x7)) {
2171 mono_interlocked_lock ();
2173 mono_interlocked_unlock ();
2177 return InterlockedRead64 (location);
2181 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2183 mono_memory_barrier ();
2187 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2189 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2191 if (state & ThreadState_Background) {
2192 /* If the thread changes the background mode, the main thread has to
2193 * be notified, since it has to rebuild the list of threads to
2196 mono_os_event_set (&background_change_event);
2201 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2203 mono_thread_set_state (this_obj, (MonoThreadState)state);
2205 if (state & ThreadState_Background) {
2206 /* If the thread changes the background mode, the main thread has to
2207 * be notified, since it has to rebuild the list of threads to
2210 mono_os_event_set (&background_change_event);
2215 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2219 LOCK_THREAD (this_obj);
2221 state = this_obj->state;
2223 UNLOCK_THREAD (this_obj);
2228 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2230 MonoInternalThread *current;
2232 MonoInternalThread *thread = this_obj->internal_thread;
2234 LOCK_THREAD (thread);
2236 current = mono_thread_internal_current ();
2238 thread->thread_interrupt_requested = TRUE;
2239 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2241 UNLOCK_THREAD (thread);
2244 async_abort_internal (thread, FALSE);
2249 * mono_thread_current_check_pending_interrupt:
2250 * Checks if there's a interruption request and set the pending exception if so.
2251 * \returns true if a pending exception was set
2254 mono_thread_current_check_pending_interrupt (void)
2256 MonoInternalThread *thread = mono_thread_internal_current ();
2257 gboolean throw_ = FALSE;
2259 LOCK_THREAD (thread);
2261 if (thread->thread_interrupt_requested) {
2263 thread->thread_interrupt_requested = FALSE;
2266 UNLOCK_THREAD (thread);
2269 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2274 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2276 LOCK_THREAD (thread);
2278 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2280 UNLOCK_THREAD (thread);
2284 if ((thread->state & ThreadState_Unstarted) != 0) {
2285 thread->state |= ThreadState_Aborted;
2286 UNLOCK_THREAD (thread);
2290 thread->state |= ThreadState_AbortRequested;
2291 if (thread->abort_state_handle)
2292 mono_gchandle_free (thread->abort_state_handle);
2294 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2295 g_assert (thread->abort_state_handle);
2297 thread->abort_state_handle = 0;
2299 thread->abort_exc = NULL;
2301 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));
2303 /* During shutdown, we can't wait for other threads */
2305 /* Make sure the thread is awake */
2306 mono_thread_resume (thread);
2308 UNLOCK_THREAD (thread);
2313 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2315 if (!request_thread_abort (thread, state))
2318 if (thread == mono_thread_internal_current ()) {
2320 self_abort_internal (&error);
2321 mono_error_set_pending_exception (&error);
2323 async_abort_internal (thread, TRUE);
2328 * mono_thread_internal_abort:
2329 * Request thread \p thread to be aborted.
2330 * \p thread MUST NOT be the current thread.
2333 mono_thread_internal_abort (MonoInternalThread *thread)
2335 g_assert (thread != mono_thread_internal_current ());
2337 if (!request_thread_abort (thread, NULL))
2339 async_abort_internal (thread, TRUE);
2343 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2345 MonoInternalThread *thread = mono_thread_internal_current ();
2346 gboolean was_aborting;
2348 LOCK_THREAD (thread);
2349 was_aborting = thread->state & ThreadState_AbortRequested;
2350 thread->state &= ~ThreadState_AbortRequested;
2351 UNLOCK_THREAD (thread);
2353 if (!was_aborting) {
2354 const char *msg = "Unable to reset abort because no abort was requested";
2355 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2359 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2360 thread->abort_exc = NULL;
2361 if (thread->abort_state_handle) {
2362 mono_gchandle_free (thread->abort_state_handle);
2363 /* This is actually not necessary - the handle
2364 only counts if the exception is set */
2365 thread->abort_state_handle = 0;
2370 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2372 LOCK_THREAD (thread);
2374 thread->state &= ~ThreadState_AbortRequested;
2376 if (thread->abort_exc) {
2377 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2378 thread->abort_exc = NULL;
2379 if (thread->abort_state_handle) {
2380 mono_gchandle_free (thread->abort_state_handle);
2381 /* This is actually not necessary - the handle
2382 only counts if the exception is set */
2383 thread->abort_state_handle = 0;
2387 UNLOCK_THREAD (thread);
2391 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2394 MonoInternalThread *thread = this_obj->internal_thread;
2395 MonoObject *state, *deserialized = NULL;
2398 if (!thread->abort_state_handle)
2401 state = mono_gchandle_get_target (thread->abort_state_handle);
2404 domain = mono_domain_get ();
2405 if (mono_object_domain (state) == domain)
2408 deserialized = mono_object_xdomain_representation (state, domain, &error);
2410 if (!deserialized) {
2411 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2412 if (!is_ok (&error)) {
2413 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2414 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2416 mono_set_pending_exception (invalid_op_exc);
2420 return deserialized;
2424 mono_thread_suspend (MonoInternalThread *thread)
2426 LOCK_THREAD (thread);
2428 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2430 UNLOCK_THREAD (thread);
2434 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2436 UNLOCK_THREAD (thread);
2440 thread->state |= ThreadState_SuspendRequested;
2441 mono_os_event_reset (thread->suspended);
2443 if (thread == mono_thread_internal_current ()) {
2444 /* calls UNLOCK_THREAD (thread) */
2445 self_suspend_internal ();
2447 /* calls UNLOCK_THREAD (thread) */
2448 async_suspend_internal (thread, FALSE);
2455 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2457 if (!mono_thread_suspend (this_obj->internal_thread)) {
2458 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2463 /* LOCKING: LOCK_THREAD(thread) must be held */
2465 mono_thread_resume (MonoInternalThread *thread)
2467 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2468 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2469 thread->state &= ~ThreadState_SuspendRequested;
2470 mono_os_event_set (thread->suspended);
2474 if ((thread->state & ThreadState_Suspended) == 0 ||
2475 (thread->state & ThreadState_Unstarted) != 0 ||
2476 (thread->state & ThreadState_Aborted) != 0 ||
2477 (thread->state & ThreadState_Stopped) != 0)
2479 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2483 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2485 mono_os_event_set (thread->suspended);
2487 if (!thread->self_suspended) {
2488 UNLOCK_THREAD (thread);
2490 /* Awake the thread */
2491 if (!mono_thread_info_resume (thread_get_tid (thread)))
2494 LOCK_THREAD (thread);
2497 thread->state &= ~ThreadState_Suspended;
2503 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2505 if (!thread->internal_thread) {
2506 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2508 LOCK_THREAD (thread->internal_thread);
2509 if (!mono_thread_resume (thread->internal_thread))
2510 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2511 UNLOCK_THREAD (thread->internal_thread);
2516 mono_threads_is_critical_method (MonoMethod *method)
2518 switch (method->wrapper_type) {
2519 case MONO_WRAPPER_RUNTIME_INVOKE:
2520 case MONO_WRAPPER_XDOMAIN_INVOKE:
2521 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2528 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2533 if (mono_threads_is_critical_method (m)) {
2534 *((gboolean*)data) = TRUE;
2541 is_running_protected_wrapper (void)
2543 gboolean found = FALSE;
2544 mono_stack_walk (find_wrapper, &found);
2552 mono_thread_stop (MonoThread *thread)
2554 MonoInternalThread *internal = thread->internal_thread;
2556 if (!request_thread_abort (internal, NULL))
2559 if (internal == mono_thread_internal_current ()) {
2561 self_abort_internal (&error);
2563 This function is part of the embeding API and has no way to return the exception
2564 to be thrown. So what we do is keep the old behavior and raise the exception.
2566 mono_error_raise_exception (&error); /* OK to throw, see note */
2568 async_abort_internal (internal, TRUE);
2573 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2575 gint8 tmp = *(volatile gint8 *)ptr;
2576 mono_memory_barrier ();
2581 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2583 gint16 tmp = *(volatile gint16 *)ptr;
2584 mono_memory_barrier ();
2589 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2591 gint32 tmp = *(volatile gint32 *)ptr;
2592 mono_memory_barrier ();
2597 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2599 gint64 tmp = *(volatile gint64 *)ptr;
2600 mono_memory_barrier ();
2605 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2607 volatile void *tmp = *(volatile void **)ptr;
2608 mono_memory_barrier ();
2609 return (void *) tmp;
2613 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2615 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2616 mono_memory_barrier ();
2617 return (MonoObject *) tmp;
2621 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2623 double tmp = *(volatile double *)ptr;
2624 mono_memory_barrier ();
2629 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2631 float tmp = *(volatile float *)ptr;
2632 mono_memory_barrier ();
2637 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2639 return InterlockedRead8 ((volatile gint8 *)ptr);
2643 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2645 return InterlockedRead16 ((volatile gint16 *)ptr);
2649 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2651 return InterlockedRead ((volatile gint32 *)ptr);
2655 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2657 #if SIZEOF_VOID_P == 4
2658 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2660 mono_interlocked_lock ();
2661 val = *(gint64*)ptr;
2662 mono_interlocked_unlock ();
2666 return InterlockedRead64 ((volatile gint64 *)ptr);
2670 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2672 return InterlockedReadPointer ((volatile gpointer *)ptr);
2676 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2680 #if SIZEOF_VOID_P == 4
2681 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2683 mono_interlocked_lock ();
2684 val = *(double*)ptr;
2685 mono_interlocked_unlock ();
2690 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2696 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2700 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2706 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2708 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2712 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2714 mono_memory_barrier ();
2715 *(volatile gint8 *)ptr = value;
2719 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2721 mono_memory_barrier ();
2722 *(volatile gint16 *)ptr = value;
2726 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2728 mono_memory_barrier ();
2729 *(volatile gint32 *)ptr = value;
2733 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2735 mono_memory_barrier ();
2736 *(volatile gint64 *)ptr = value;
2740 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2742 mono_memory_barrier ();
2743 *(volatile void **)ptr = value;
2747 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2749 mono_memory_barrier ();
2750 mono_gc_wbarrier_generic_store (ptr, value);
2754 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2756 mono_memory_barrier ();
2757 *(volatile double *)ptr = value;
2761 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2763 mono_memory_barrier ();
2764 *(volatile float *)ptr = value;
2768 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2770 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2774 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2776 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2780 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2782 InterlockedWrite ((volatile gint32 *)ptr, value);
2786 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2788 #if SIZEOF_VOID_P == 4
2789 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2790 mono_interlocked_lock ();
2791 *(gint64*)ptr = value;
2792 mono_interlocked_unlock ();
2797 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2801 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2803 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2807 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2811 #if SIZEOF_VOID_P == 4
2812 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2813 mono_interlocked_lock ();
2814 *(double*)ptr = value;
2815 mono_interlocked_unlock ();
2822 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2826 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2832 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2836 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2838 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2842 free_context (void *user_data)
2844 ContextStaticData *data = user_data;
2846 mono_threads_lock ();
2849 * There is no guarantee that, by the point this reference queue callback
2850 * has been invoked, the GC handle associated with the object will fail to
2851 * resolve as one might expect. So if we don't free and remove the GC
2852 * handle here, free_context_static_data_helper () could end up resolving
2853 * a GC handle to an actually-dead context which would contain a pointer
2854 * to an already-freed static data segment, resulting in a crash when
2857 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2859 mono_threads_unlock ();
2861 mono_gchandle_free (data->gc_handle);
2862 mono_free_static_data (data->static_data);
2867 mono_threads_register_app_context (MonoAppContext *ctx, MonoError *error)
2870 mono_threads_lock ();
2872 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2875 contexts = g_hash_table_new (NULL, NULL);
2878 context_queue = mono_gc_reference_queue_new (free_context);
2880 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2881 g_hash_table_insert (contexts, gch, gch);
2884 * We use this intermediate structure to contain a duplicate pointer to
2885 * the static data because we can't rely on being able to resolve the GC
2886 * handle in the reference queue callback.
2888 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2889 data->gc_handle = GPOINTER_TO_UINT (gch);
2892 context_adjust_static_data (ctx);
2893 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2895 mono_threads_unlock ();
2897 mono_profiler_context_loaded (ctx);
2901 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContextHandle ctx, MonoError *error)
2904 mono_threads_register_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_register_app_context */
2908 mono_threads_release_app_context (MonoAppContext* ctx, MonoError *error)
2911 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2912 * cleanup in exceptional circumstances, we don't actually do any
2913 * cleanup work here. We instead do this via a reference queue.
2916 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2918 mono_profiler_context_unloaded (ctx);
2922 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContextHandle ctx, MonoError *error)
2925 mono_threads_release_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_release_app_context */
2928 void mono_thread_init (MonoThreadStartCB start_cb,
2929 MonoThreadAttachCB attach_cb)
2931 mono_coop_mutex_init_recursive (&threads_mutex);
2933 mono_os_mutex_init_recursive(&interlocked_mutex);
2934 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2936 mono_os_event_init (&background_change_event, FALSE);
2938 mono_init_static_data_info (&thread_static_info);
2939 mono_init_static_data_info (&context_static_info);
2941 mono_thread_start_cb = start_cb;
2942 mono_thread_attach_cb = attach_cb;
2946 * mono_thread_cleanup:
2949 mono_thread_cleanup (void)
2951 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
2952 /* The main thread must abandon any held mutexes (particularly
2953 * important for named mutexes as they are shared across
2954 * processes, see bug 74680.) This will happen when the
2955 * thread exits, but if it's not running in a subthread it
2956 * won't exit in time.
2958 mono_w32mutex_abandon ();
2962 /* This stuff needs more testing, it seems one of these
2963 * critical sections can be locked when mono_thread_cleanup is
2966 mono_coop_mutex_destroy (&threads_mutex);
2967 mono_os_mutex_destroy (&interlocked_mutex);
2968 mono_os_mutex_destroy (&delayed_free_table_mutex);
2969 mono_os_mutex_destroy (&small_id_mutex);
2970 mono_os_event_destroy (&background_change_event);
2975 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
2977 mono_thread_cleanup_fn = func;
2981 * mono_thread_set_manage_callback:
2984 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
2986 thread->internal_thread->manage_callback = func;
2990 static void print_tids (gpointer key, gpointer value, gpointer user)
2992 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
2993 * sizeof(uint) and a cast to uint would overflow
2995 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
2996 * print this as a pointer.
2998 g_message ("Waiting for: %p", key);
3003 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3004 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3009 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3012 MonoThreadInfoWaitRet ret;
3014 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3016 /* Add the thread state change event, so it wakes
3017 * up if a thread changes to background mode. */
3020 if (check_state_change)
3021 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3023 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3026 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3027 /* See the comment in build_wait_tids() */
3028 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3032 for( i = 0; i < wait->num; i++)
3033 mono_threads_close_thread_handle (wait->handles [i]);
3035 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3038 if (ret < wait->num) {
3039 MonoInternalThread *internal;
3041 internal = wait->threads [ret];
3043 mono_threads_lock ();
3044 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3045 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3046 mono_threads_unlock ();
3050 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3052 struct wait_data *wait=(struct wait_data *)user;
3054 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3055 MonoInternalThread *thread=(MonoInternalThread *)value;
3057 /* Ignore background threads, we abort them later */
3058 /* Do not lock here since it is not needed and the caller holds threads_lock */
3059 if (thread->state & ThreadState_Background) {
3060 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3061 return; /* just leave, ignore */
3064 if (mono_gc_is_finalizer_internal_thread (thread)) {
3065 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3069 if (thread == mono_thread_internal_current ()) {
3070 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3074 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3075 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3079 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3080 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3084 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3085 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3086 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3087 wait->threads[wait->num]=thread;
3090 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3092 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3097 /* Just ignore the rest, we can't do anything with
3104 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3106 struct wait_data *wait=(struct wait_data *)user;
3107 MonoNativeThreadId self = mono_native_thread_id_get ();
3108 MonoInternalThread *thread = (MonoInternalThread *)value;
3110 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3113 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3115 if (mono_gc_is_finalizer_internal_thread (thread))
3118 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3119 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3120 wait->threads[wait->num] = thread;
3123 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3124 mono_thread_internal_abort (thread);
3131 * mono_threads_set_shutting_down:
3133 * Is called by a thread that wants to shut down Mono. If the runtime is already
3134 * shutting down, the calling thread is suspended/stopped, and this function never
3138 mono_threads_set_shutting_down (void)
3140 MonoInternalThread *current_thread = mono_thread_internal_current ();
3142 mono_threads_lock ();
3144 if (shutting_down) {
3145 mono_threads_unlock ();
3147 /* Make sure we're properly suspended/stopped */
3149 LOCK_THREAD (current_thread);
3151 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3152 UNLOCK_THREAD (current_thread);
3153 mono_thread_execute_interruption ();
3155 UNLOCK_THREAD (current_thread);
3158 /*since we're killing the thread, detach it.*/
3159 mono_thread_detach_internal (current_thread);
3161 /* Wake up other threads potentially waiting for us */
3162 mono_thread_info_exit (0);
3164 shutting_down = TRUE;
3166 /* Not really a background state change, but this will
3167 * interrupt the main thread if it is waiting for all
3168 * the other threads.
3170 mono_os_event_set (&background_change_event);
3172 mono_threads_unlock ();
3177 * mono_thread_manage:
3180 mono_thread_manage (void)
3182 struct wait_data wait_data;
3183 struct wait_data *wait = &wait_data;
3185 memset (wait, 0, sizeof (struct wait_data));
3186 /* join each thread that's still running */
3187 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3189 mono_threads_lock ();
3191 THREAD_DEBUG (g_message("%s: No threads", __func__));
3192 mono_threads_unlock ();
3195 mono_threads_unlock ();
3198 mono_threads_lock ();
3199 if (shutting_down) {
3200 /* somebody else is shutting down */
3201 mono_threads_unlock ();
3204 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3205 mono_g_hash_table_foreach (threads, print_tids, NULL));
3207 mono_os_event_reset (&background_change_event);
3209 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3210 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3211 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3212 mono_threads_unlock ();
3214 /* Something to wait for */
3215 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3216 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3217 } while(wait->num>0);
3219 /* Mono is shutting down, so just wait for the end */
3220 if (!mono_runtime_try_shutdown ()) {
3221 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3222 mono_thread_suspend (mono_thread_internal_current ());
3223 mono_thread_execute_interruption ();
3227 * Remove everything but the finalizer thread and self.
3228 * Also abort all the background threads
3231 mono_threads_lock ();
3234 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3235 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3236 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3238 mono_threads_unlock ();
3240 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3241 if (wait->num > 0) {
3242 /* Something to wait for */
3243 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3245 } while (wait->num > 0);
3248 * give the subthreads a chance to really quit (this is mainly needed
3249 * to get correct user and system times from getrusage/wait/time(1)).
3250 * This could be removed if we avoid pthread_detach() and use pthread_join().
3252 mono_thread_info_yield ();
3256 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3258 MonoInternalThread *thread = (MonoInternalThread*)value;
3259 struct wait_data *wait = (struct wait_data*)user_data;
3262 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3264 * This needs no locking.
3266 if ((thread->state & ThreadState_Suspended) != 0 ||
3267 (thread->state & ThreadState_Stopped) != 0)
3270 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3271 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3272 wait->threads [wait->num] = thread;
3278 * mono_thread_suspend_all_other_threads:
3280 * Suspend all managed threads except the finalizer thread and this thread. It is
3281 * not possible to resume them later.
3283 void mono_thread_suspend_all_other_threads (void)
3285 struct wait_data wait_data;
3286 struct wait_data *wait = &wait_data;
3288 MonoNativeThreadId self = mono_native_thread_id_get ();
3289 guint32 eventidx = 0;
3290 gboolean starting, finished;
3292 memset (wait, 0, sizeof (struct wait_data));
3294 * The other threads could be in an arbitrary state at this point, i.e.
3295 * they could be starting up, shutting down etc. This means that there could be
3296 * threads which are not even in the threads hash table yet.
3300 * First we set a barrier which will be checked by all threads before they
3301 * are added to the threads hash table, and they will exit if the flag is set.
3302 * This ensures that no threads could be added to the hash later.
3303 * We will use shutting_down as the barrier for now.
3305 g_assert (shutting_down);
3308 * We make multiple calls to WaitForMultipleObjects since:
3309 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3310 * - some threads could exit without becoming suspended
3315 * Make a copy of the hashtable since we can't do anything with
3316 * threads while threads_mutex is held.
3319 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3320 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3321 mono_threads_lock ();
3322 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3323 mono_threads_unlock ();
3326 /* Get the suspended events that we'll be waiting for */
3327 for (i = 0; i < wait->num; ++i) {
3328 MonoInternalThread *thread = wait->threads [i];
3330 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3331 || mono_gc_is_finalizer_internal_thread (thread)
3332 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3334 mono_threads_close_thread_handle (wait->handles [i]);
3335 wait->threads [i] = NULL;
3339 LOCK_THREAD (thread);
3341 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3342 UNLOCK_THREAD (thread);
3343 mono_threads_close_thread_handle (wait->handles [i]);
3344 wait->threads [i] = NULL;
3350 /* Convert abort requests into suspend requests */
3351 if ((thread->state & ThreadState_AbortRequested) != 0)
3352 thread->state &= ~ThreadState_AbortRequested;
3354 thread->state |= ThreadState_SuspendRequested;
3355 mono_os_event_reset (thread->suspended);
3357 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3358 async_suspend_internal (thread, TRUE);
3360 mono_threads_close_thread_handle (wait->handles [i]);
3361 wait->threads [i] = NULL;
3363 if (eventidx <= 0) {
3365 * If there are threads which are starting up, we wait until they
3366 * are suspended when they try to register in the threads hash.
3367 * This is guaranteed to finish, since the threads which can create new
3368 * threads get suspended after a while.
3369 * FIXME: The finalizer thread can still create new threads.
3371 mono_threads_lock ();
3372 if (threads_starting_up)
3373 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3376 mono_threads_unlock ();
3378 mono_thread_info_sleep (100, NULL);
3386 MonoInternalThread *thread;
3387 MonoStackFrameInfo *frames;
3388 int nframes, max_frames;
3389 int nthreads, max_threads;
3390 MonoInternalThread **threads;
3391 } ThreadDumpUserData;
3393 static gboolean thread_dump_requested;
3395 /* This needs to be async safe */
3397 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3399 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3401 if (ud->nframes < ud->max_frames) {
3402 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3409 /* This needs to be async safe */
3410 static SuspendThreadResult
3411 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3413 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3414 MonoInternalThread *thread = user_data->thread;
3417 /* This no longer works with remote unwinding */
3418 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3419 mono_thread_internal_describe (thread, text);
3420 g_string_append (text, "\n");
3423 if (thread == mono_thread_internal_current ())
3424 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3426 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3428 return MonoResumeThread;
3432 int nthreads, max_threads;
3433 MonoInternalThread **threads;
3434 } CollectThreadsUserData;
3437 collect_thread (gpointer key, gpointer value, gpointer user)
3439 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3440 MonoInternalThread *thread = (MonoInternalThread *)value;
3442 if (ud->nthreads < ud->max_threads)
3443 ud->threads [ud->nthreads ++] = thread;
3447 * Collect running threads into the THREADS array.
3448 * THREADS should be an array allocated on the stack.
3451 collect_threads (MonoInternalThread **thread_array, int max_threads)
3453 CollectThreadsUserData ud;
3455 memset (&ud, 0, sizeof (ud));
3456 /* This array contains refs, but its on the stack, so its ok */
3457 ud.threads = thread_array;
3458 ud.max_threads = max_threads;
3460 mono_threads_lock ();
3461 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3462 mono_threads_unlock ();
3468 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3470 GString* text = g_string_new (0);
3472 GError *error = NULL;
3475 ud->thread = thread;
3478 /* Collect frames for the thread */
3479 if (thread == mono_thread_internal_current ()) {
3480 get_thread_dump (mono_thread_info_current (), ud);
3482 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3486 * Do all the non async-safe work outside of get_thread_dump.
3489 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3491 g_string_append_printf (text, "\n\"%s\"", name);
3494 else if (thread->threadpool_thread) {
3495 g_string_append (text, "\n\"<threadpool thread>\"");
3497 g_string_append (text, "\n\"<unnamed thread>\"");
3500 for (i = 0; i < ud->nframes; ++i) {
3501 MonoStackFrameInfo *frame = &ud->frames [i];
3502 MonoMethod *method = NULL;
3504 if (frame->type == FRAME_TYPE_MANAGED)
3505 method = mono_jit_info_get_method (frame->ji);
3508 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3509 g_string_append_printf (text, " %s\n", location);
3512 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3516 fprintf (stdout, "%s", text->str);
3518 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3519 OutputDebugStringA(text->str);
3522 g_string_free (text, TRUE);
3527 mono_threads_perform_thread_dump (void)
3529 ThreadDumpUserData ud;
3530 MonoInternalThread *thread_array [128];
3531 int tindex, nthreads;
3533 if (!thread_dump_requested)
3536 printf ("Full thread dump:\n");
3538 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3539 nthreads = collect_threads (thread_array, 128);
3541 memset (&ud, 0, sizeof (ud));
3542 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3543 ud.max_frames = 256;
3545 for (tindex = 0; tindex < nthreads; ++tindex)
3546 dump_thread (thread_array [tindex], &ud);
3550 thread_dump_requested = FALSE;
3553 /* Obtain the thread dump of all threads */
3555 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3558 ThreadDumpUserData ud;
3559 MonoInternalThread *thread_array [128];
3560 MonoDomain *domain = mono_domain_get ();
3561 MonoDebugSourceLocation *location;
3562 int tindex, nthreads;
3566 *out_threads = NULL;
3567 *out_stack_frames = NULL;
3569 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3570 nthreads = collect_threads (thread_array, 128);
3572 memset (&ud, 0, sizeof (ud));
3573 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3574 ud.max_frames = 256;
3576 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3579 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3583 for (tindex = 0; tindex < nthreads; ++tindex) {
3584 MonoInternalThread *thread = thread_array [tindex];
3585 MonoArray *thread_frames;
3591 /* Collect frames for the thread */
3592 if (thread == mono_thread_internal_current ()) {
3593 get_thread_dump (mono_thread_info_current (), &ud);
3595 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3598 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3600 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3603 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3605 for (i = 0; i < ud.nframes; ++i) {
3606 MonoStackFrameInfo *frame = &ud.frames [i];
3607 MonoMethod *method = NULL;
3608 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3612 sf->native_offset = frame->native_offset;
3614 if (frame->type == FRAME_TYPE_MANAGED)
3615 method = mono_jit_info_get_method (frame->ji);
3618 sf->method_address = (gsize) frame->ji->code_start;
3620 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3623 MONO_OBJECT_SETREF (sf, method, rm);
3625 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3627 sf->il_offset = location->il_offset;
3629 if (location && location->source_file) {
3630 MonoString *filename = mono_string_new_checked (domain, location->source_file, error);
3633 MONO_OBJECT_SETREF (sf, filename, filename);
3634 sf->line = location->row;
3635 sf->column = location->column;
3637 mono_debug_free_source_location (location);
3642 mono_array_setref (thread_frames, i, sf);
3648 return is_ok (error);
3652 * mono_threads_request_thread_dump:
3654 * Ask all threads except the current to print their stacktrace to stdout.
3657 mono_threads_request_thread_dump (void)
3659 /*The new thread dump code runs out of the finalizer thread. */
3660 thread_dump_requested = TRUE;
3661 mono_gc_finalize_notify ();
3666 gint allocated; /* +1 so that refs [allocated] == NULL */
3670 typedef struct ref_stack RefStack;
3673 ref_stack_new (gint initial_size)
3677 initial_size = MAX (initial_size, 16) + 1;
3678 rs = g_new0 (RefStack, 1);
3679 rs->refs = g_new0 (gpointer, initial_size);
3680 rs->allocated = initial_size;
3685 ref_stack_destroy (gpointer ptr)
3687 RefStack *rs = (RefStack *)ptr;
3696 ref_stack_push (RefStack *rs, gpointer ptr)
3698 g_assert (rs != NULL);
3700 if (rs->bottom >= rs->allocated) {
3701 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3702 rs->allocated <<= 1;
3703 rs->refs [rs->allocated] = NULL;
3705 rs->refs [rs->bottom++] = ptr;
3709 ref_stack_pop (RefStack *rs)
3711 if (rs == NULL || rs->bottom == 0)
3715 rs->refs [rs->bottom] = NULL;
3719 ref_stack_find (RefStack *rs, gpointer ptr)
3726 for (refs = rs->refs; refs && *refs; refs++) {
3734 * mono_thread_push_appdomain_ref:
3736 * Register that the current thread may have references to objects in domain
3737 * @domain on its stack. Each call to this function should be paired with a
3738 * call to pop_appdomain_ref.
3741 mono_thread_push_appdomain_ref (MonoDomain *domain)
3743 MonoInternalThread *thread = mono_thread_internal_current ();
3746 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3747 SPIN_LOCK (thread->lock_thread_id);
3748 if (thread->appdomain_refs == NULL)
3749 thread->appdomain_refs = ref_stack_new (16);
3750 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3751 SPIN_UNLOCK (thread->lock_thread_id);
3756 mono_thread_pop_appdomain_ref (void)
3758 MonoInternalThread *thread = mono_thread_internal_current ();
3761 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3762 SPIN_LOCK (thread->lock_thread_id);
3763 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3764 SPIN_UNLOCK (thread->lock_thread_id);
3769 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3772 SPIN_LOCK (thread->lock_thread_id);
3773 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3774 SPIN_UNLOCK (thread->lock_thread_id);
3779 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3781 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3784 typedef struct abort_appdomain_data {
3785 struct wait_data wait;
3787 } abort_appdomain_data;
3790 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3792 MonoInternalThread *thread = (MonoInternalThread*)value;
3793 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3794 MonoDomain *domain = data->domain;
3796 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3797 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3799 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3800 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3801 data->wait.threads [data->wait.num] = thread;
3804 /* Just ignore the rest, we can't do anything with
3812 * mono_threads_abort_appdomain_threads:
3814 * Abort threads which has references to the given appdomain.
3817 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3819 abort_appdomain_data user_data;
3821 int orig_timeout = timeout;
3824 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3826 start_time = mono_msec_ticks ();
3828 mono_threads_lock ();
3830 user_data.domain = domain;
3831 user_data.wait.num = 0;
3832 /* This shouldn't take any locks */
3833 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3834 mono_threads_unlock ();
3836 if (user_data.wait.num > 0) {
3837 /* Abort the threads outside the threads lock */
3838 for (i = 0; i < user_data.wait.num; ++i)
3839 mono_thread_internal_abort (user_data.wait.threads [i]);
3842 * We should wait for the threads either to abort, or to leave the
3843 * domain. We can't do the latter, so we wait with a timeout.
3845 wait_for_tids (&user_data.wait, 100, FALSE);
3848 /* Update remaining time */
3849 timeout -= mono_msec_ticks () - start_time;
3850 start_time = mono_msec_ticks ();
3852 if (orig_timeout != -1 && timeout < 0)
3855 while (user_data.wait.num > 0);
3857 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3863 * mono_thread_get_undeniable_exception:
3865 * Return an exception which needs to be raised when leaving a catch clause.
3866 * This is used for undeniable exception propagation.
3869 mono_thread_get_undeniable_exception (void)
3871 MonoInternalThread *thread = mono_thread_internal_current ();
3873 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3876 // We don't want to have our exception effect calls made by
3877 // the catching block
3879 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3883 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3884 * exception if the thread no longer references a dying appdomain.
3886 thread->abort_exc->trace_ips = NULL;
3887 thread->abort_exc->stack_trace = NULL;
3888 return thread->abort_exc;
3891 #if MONO_SMALL_CONFIG
3892 #define NUM_STATIC_DATA_IDX 4
3893 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3897 #define NUM_STATIC_DATA_IDX 8
3898 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3899 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3903 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3904 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3907 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3909 gpointer *static_data = (gpointer *)addr;
3911 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3912 void **ptr = (void **)static_data [i];
3917 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3918 void **p = ptr + idx;
3921 mark_func ((MonoObject**)p, gc_data);
3927 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3929 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3933 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3935 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3939 * mono_alloc_static_data
3941 * Allocate memory blocks for storing threads or context static data
3944 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3946 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3949 gpointer* static_data = *static_data_ptr;
3951 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3952 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
3954 if (mono_gc_user_markers_supported ()) {
3955 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
3956 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
3958 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
3959 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
3962 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
3963 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3964 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3965 *static_data_ptr = static_data;
3966 static_data [0] = static_data;
3969 for (i = 1; i <= idx; ++i) {
3970 if (static_data [i])
3973 if (mono_gc_user_markers_supported ())
3974 static_data [i] = g_malloc0 (static_data_size [i]);
3976 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
3977 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
3978 threadlocal ? "managed thread-static variables" : "managed context-static variables");
3983 mono_free_static_data (gpointer* static_data)
3986 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
3987 gpointer p = static_data [i];
3991 * At this point, the static data pointer array is still registered with the
3992 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
3993 * data. Freeing the individual arrays without first nulling their slots
3994 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
3995 * such an already freed array. See bug #13813.
3997 static_data [i] = NULL;
3998 mono_memory_write_barrier ();
3999 if (mono_gc_user_markers_supported ())
4002 mono_gc_free_fixed (p);
4004 mono_gc_free_fixed (static_data);
4008 * mono_init_static_data_info
4010 * Initializes static data counters
4012 static void mono_init_static_data_info (StaticDataInfo *static_data)
4014 static_data->idx = 0;
4015 static_data->offset = 0;
4016 static_data->freelist = NULL;
4020 * mono_alloc_static_data_slot
4022 * Generates an offset for static data. static_data contains the counters
4023 * used to generate it.
4026 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4028 if (!static_data->idx && !static_data->offset) {
4030 * we use the first chunk of the first allocation also as
4031 * an array for the rest of the data
4033 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4035 static_data->offset += align - 1;
4036 static_data->offset &= ~(align - 1);
4037 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4038 static_data->idx ++;
4039 g_assert (size <= static_data_size [static_data->idx]);
4040 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4041 static_data->offset = 0;
4043 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4044 static_data->offset += size;
4049 * LOCKING: requires that threads_mutex is held
4052 context_adjust_static_data (MonoAppContext *ctx)
4054 if (context_static_info.offset || context_static_info.idx > 0) {
4055 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4056 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4057 ctx->data->static_data = ctx->static_data;
4062 * LOCKING: requires that threads_mutex is held
4065 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4067 MonoInternalThread *thread = (MonoInternalThread *)value;
4068 guint32 offset = GPOINTER_TO_UINT (user);
4070 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4074 * LOCKING: requires that threads_mutex is held
4077 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4079 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4084 guint32 offset = GPOINTER_TO_UINT (user);
4085 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4086 ctx->data->static_data = ctx->static_data;
4089 static StaticDataFreeList*
4090 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4092 StaticDataFreeList* prev = NULL;
4093 StaticDataFreeList* tmp = static_data->freelist;
4095 if (tmp->size == size) {
4097 prev->next = tmp->next;
4099 static_data->freelist = tmp->next;
4108 #if SIZEOF_VOID_P == 4
4115 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4117 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4119 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4120 MonoBitSet *rb = sets [idx];
4121 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4122 offset /= sizeof (uintptr_t);
4123 /* offset is now the bitmap offset */
4124 for (int i = 0; i < numbits; ++i) {
4125 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4126 mono_bitset_set_fast (rb, offset + i);
4131 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4133 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4134 MonoBitSet *rb = sets [idx];
4135 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4136 offset /= sizeof (uintptr_t);
4137 /* offset is now the bitmap offset */
4138 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4139 mono_bitset_clear_fast (rb, offset + i);
4143 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4145 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4147 StaticDataInfo *info;
4150 if (static_type == SPECIAL_STATIC_THREAD) {
4151 info = &thread_static_info;
4152 sets = thread_reference_bitmaps;
4154 info = &context_static_info;
4155 sets = context_reference_bitmaps;
4158 mono_threads_lock ();
4160 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4164 offset = item->offset;
4167 offset = mono_alloc_static_data_slot (info, size, align);
4170 update_reference_bitmap (sets, offset, bitmap, numbits);
4172 if (static_type == SPECIAL_STATIC_THREAD) {
4173 /* This can be called during startup */
4174 if (threads != NULL)
4175 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4177 if (contexts != NULL)
4178 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4180 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4183 mono_threads_unlock ();
4189 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4191 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4193 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4194 return get_thread_static_data (thread, offset);
4196 return get_context_static_data (thread->current_appcontext, offset);
4201 mono_get_special_static_data (guint32 offset)
4203 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4212 * LOCKING: requires that threads_mutex is held
4215 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4217 MonoInternalThread *thread = (MonoInternalThread *)value;
4218 OffsetSize *data = (OffsetSize *)user;
4219 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4220 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4223 if (!thread->static_data || !thread->static_data [idx])
4225 ptr = ((char*) thread->static_data [idx]) + off;
4226 mono_gc_bzero_atomic (ptr, data->size);
4230 * LOCKING: requires that threads_mutex is held
4233 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4235 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4240 OffsetSize *data = (OffsetSize *)user;
4241 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4242 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4245 if (!ctx->static_data || !ctx->static_data [idx])
4248 ptr = ((char*) ctx->static_data [idx]) + off;
4249 mono_gc_bzero_atomic (ptr, data->size);
4253 do_free_special_slot (guint32 offset, guint32 size)
4255 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4257 StaticDataInfo *info;
4259 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4260 info = &thread_static_info;
4261 sets = thread_reference_bitmaps;
4263 info = &context_static_info;
4264 sets = context_reference_bitmaps;
4267 guint32 data_offset = offset;
4268 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4269 OffsetSize data = { data_offset, size };
4271 clear_reference_bitmap (sets, data.offset, data.size);
4273 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4274 if (threads != NULL)
4275 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4277 if (contexts != NULL)
4278 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4281 if (!mono_runtime_is_shutting_down ()) {
4282 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4284 item->offset = offset;
4287 item->next = info->freelist;
4288 info->freelist = item;
4293 do_free_special (gpointer key, gpointer value, gpointer data)
4295 MonoClassField *field = (MonoClassField *)key;
4296 guint32 offset = GPOINTER_TO_UINT (value);
4299 size = mono_type_size (field->type, &align);
4300 do_free_special_slot (offset, size);
4304 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4306 mono_threads_lock ();
4308 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4310 mono_threads_unlock ();
4314 static void CALLBACK dummy_apc (ULONG_PTR param)
4320 * mono_thread_execute_interruption
4322 * Performs the operation that the requested thread state requires (abort,
4325 static MonoException*
4326 mono_thread_execute_interruption (void)
4328 MonoInternalThread *thread = mono_thread_internal_current ();
4329 MonoThread *sys_thread = mono_thread_current ();
4331 LOCK_THREAD (thread);
4333 /* MonoThread::interruption_requested can only be changed with atomics */
4334 if (!mono_thread_clear_interruption_requested (thread)) {
4335 UNLOCK_THREAD (thread);
4339 /* this will consume pending APC calls */
4341 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4343 /* Clear the interrupted flag of the thread so it can wait again */
4344 mono_thread_info_clear_self_interrupt ();
4346 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4347 if (sys_thread->pending_exception) {
4350 exc = sys_thread->pending_exception;
4351 sys_thread->pending_exception = NULL;
4353 UNLOCK_THREAD (thread);
4355 } else if (thread->state & (ThreadState_AbortRequested)) {
4356 UNLOCK_THREAD (thread);
4357 g_assert (sys_thread->pending_exception == NULL);
4358 if (thread->abort_exc == NULL) {
4360 * This might be racy, but it has to be called outside the lock
4361 * since it calls managed code.
4363 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4365 return thread->abort_exc;
4366 } else if (thread->state & (ThreadState_SuspendRequested)) {
4367 /* calls UNLOCK_THREAD (thread) */
4368 self_suspend_internal ();
4370 } else if (thread->thread_interrupt_requested) {
4372 thread->thread_interrupt_requested = FALSE;
4373 UNLOCK_THREAD (thread);
4375 return(mono_get_exception_thread_interrupted ());
4378 UNLOCK_THREAD (thread);
4384 * mono_thread_request_interruption
4386 * A signal handler can call this method to request the interruption of a
4387 * thread. The result of the interruption will depend on the current state of
4388 * the thread. If the result is an exception that needs to be throw, it is
4389 * provided as return value.
4392 mono_thread_request_interruption (gboolean running_managed)
4394 MonoInternalThread *thread = mono_thread_internal_current ();
4396 /* The thread may already be stopping */
4400 if (!mono_thread_set_interruption_requested (thread))
4403 if (!running_managed || is_running_protected_wrapper ()) {
4404 /* Can't stop while in unmanaged code. Increase the global interruption
4405 request count. When exiting the unmanaged method the count will be
4406 checked and the thread will be interrupted. */
4408 /* this will awake the thread if it is in WaitForSingleObject
4410 /* Our implementation of this function ignores the func argument */
4412 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4414 mono_thread_info_self_interrupt ();
4419 return mono_thread_execute_interruption ();
4423 /*This function should be called by a thread after it has exited all of
4424 * its handle blocks at interruption time.*/
4426 mono_thread_resume_interruption (gboolean exec)
4428 MonoInternalThread *thread = mono_thread_internal_current ();
4429 gboolean still_aborting;
4431 /* The thread may already be stopping */
4435 LOCK_THREAD (thread);
4436 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4437 UNLOCK_THREAD (thread);
4439 /*This can happen if the protected block called Thread::ResetAbort*/
4440 if (!still_aborting)
4443 if (!mono_thread_set_interruption_requested (thread))
4446 mono_thread_info_self_interrupt ();
4449 return mono_thread_execute_interruption ();
4454 gboolean mono_thread_interruption_requested ()
4456 if (thread_interruption_requested) {
4457 MonoInternalThread *thread = mono_thread_internal_current ();
4458 /* The thread may already be stopping */
4460 return mono_thread_get_interruption_requested (thread);
4465 static MonoException*
4466 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4468 MonoInternalThread *thread = mono_thread_internal_current ();
4470 /* The thread may already be stopping */
4473 if (!mono_thread_get_interruption_requested (thread))
4475 if (!bypass_abort_protection && is_running_protected_wrapper ())
4478 return mono_thread_execute_interruption ();
4482 * Performs the interruption of the current thread, if one has been requested,
4483 * and the thread is not running a protected wrapper.
4484 * Return the exception which needs to be thrown, if any.
4487 mono_thread_interruption_checkpoint (void)
4489 return mono_thread_interruption_checkpoint_request (FALSE);
4493 * Performs the interruption of the current thread, if one has been requested.
4494 * Return the exception which needs to be thrown, if any.
4497 mono_thread_force_interruption_checkpoint_noraise (void)
4499 return mono_thread_interruption_checkpoint_request (TRUE);
4503 * mono_set_pending_exception:
4505 * Set the pending exception of the current thread to EXC.
4506 * The exception will be thrown when execution returns to managed code.
4509 mono_set_pending_exception (MonoException *exc)
4511 MonoThread *thread = mono_thread_current ();
4513 /* The thread may already be stopping */
4517 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4519 mono_thread_request_interruption (FALSE);
4523 * mono_thread_interruption_request_flag:
4525 * Returns the address of a flag that will be non-zero if an interruption has
4526 * been requested for a thread. The thread to interrupt may not be the current
4527 * thread, so an additional call to mono_thread_interruption_requested() or
4528 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4531 gint32* mono_thread_interruption_request_flag ()
4533 return &thread_interruption_requested;
4537 mono_thread_init_apartment_state (void)
4540 MonoInternalThread* thread = mono_thread_internal_current ();
4542 /* Positive return value indicates success, either
4543 * S_OK if this is first CoInitialize call, or
4544 * S_FALSE if CoInitialize already called, but with same
4545 * threading model. A negative value indicates failure,
4546 * probably due to trying to change the threading model.
4548 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4549 ? COINIT_APARTMENTTHREADED
4550 : COINIT_MULTITHREADED) < 0) {
4551 thread->apartment_state = ThreadApartmentState_Unknown;
4557 mono_thread_cleanup_apartment_state (void)
4560 MonoInternalThread* thread = mono_thread_internal_current ();
4562 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4569 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4571 LOCK_THREAD (thread);
4572 thread->state |= state;
4573 UNLOCK_THREAD (thread);
4577 * mono_thread_test_and_set_state:
4578 * Test if current state of \p thread include \p test. If it does not, OR \p set into the state.
4579 * \returns TRUE if \p set was OR'd in.
4582 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4584 LOCK_THREAD (thread);
4586 if ((thread->state & test) != 0) {
4587 UNLOCK_THREAD (thread);
4591 thread->state |= set;
4592 UNLOCK_THREAD (thread);
4598 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4600 LOCK_THREAD (thread);
4601 thread->state &= ~state;
4602 UNLOCK_THREAD (thread);
4606 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4608 gboolean ret = FALSE;
4610 LOCK_THREAD (thread);
4612 if ((thread->state & test) != 0) {
4616 UNLOCK_THREAD (thread);
4622 self_interrupt_thread (void *_unused)
4625 MonoThreadInfo *info;
4627 exc = mono_thread_execute_interruption ();
4629 if (mono_threads_is_coop_enabled ()) {
4630 /* We can return from an async call in coop, as
4631 * it's simply called when exiting the safepoint */
4635 g_error ("%s: we can't resume from an async call", __func__);
4638 info = mono_thread_info_current ();
4640 /* We must use _with_context since we didn't trampoline into the runtime */
4641 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. */
4645 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4649 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4653 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4655 MonoJitInfo **dest = (MonoJitInfo **)data;
4661 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4663 MonoJitInfo *ji = NULL;
4668 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4669 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4670 * where we hold runtime locks.
4672 if (!mono_threads_is_coop_enabled ())
4673 mono_thread_info_set_is_async_context (TRUE);
4674 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4675 if (!mono_threads_is_coop_enabled ())
4676 mono_thread_info_set_is_async_context (FALSE);
4681 MonoInternalThread *thread;
4682 gboolean install_async_abort;
4683 MonoThreadInfoInterruptToken *interrupt_token;
4686 static SuspendThreadResult
4687 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4689 AbortThreadData *data = (AbortThreadData *)ud;
4690 MonoInternalThread *thread = data->thread;
4691 MonoJitInfo *ji = NULL;
4692 gboolean protected_wrapper;
4693 gboolean running_managed;
4695 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4696 return MonoResumeThread;
4698 /*someone is already interrupting it*/
4699 if (!mono_thread_set_interruption_requested (thread))
4700 return MonoResumeThread;
4702 ji = mono_thread_info_get_last_managed (info);
4703 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4704 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4706 if (!protected_wrapper && running_managed) {
4707 /*We are in managed code*/
4708 /*Set the thread to call */
4709 if (data->install_async_abort)
4710 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4711 return MonoResumeThread;
4714 * This will cause waits to be broken.
4715 * It will also prevent the thread from entering a wait, so if the thread returns
4716 * from the wait before it receives the abort signal, it will just spin in the wait
4717 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4720 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4722 return MonoResumeThread;
4727 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4729 AbortThreadData data;
4731 g_assert (thread != mono_thread_internal_current ());
4733 data.thread = thread;
4734 data.install_async_abort = install_async_abort;
4735 data.interrupt_token = NULL;
4737 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4738 if (data.interrupt_token)
4739 mono_thread_info_finish_interrupt (data.interrupt_token);
4740 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4744 self_abort_internal (MonoError *error)
4750 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4751 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4754 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.
4756 exc = mono_thread_request_interruption (TRUE);
4758 mono_error_set_exception_instance (error, exc);
4760 mono_thread_info_self_interrupt ();
4764 MonoInternalThread *thread;
4766 MonoThreadInfoInterruptToken *interrupt_token;
4767 } SuspendThreadData;
4769 static SuspendThreadResult
4770 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4772 SuspendThreadData *data = (SuspendThreadData *)ud;
4773 MonoInternalThread *thread = data->thread;
4774 MonoJitInfo *ji = NULL;
4775 gboolean protected_wrapper;
4776 gboolean running_managed;
4778 ji = mono_thread_info_get_last_managed (info);
4779 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4780 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4782 if (running_managed && !protected_wrapper) {
4783 if (mono_threads_is_coop_enabled ()) {
4784 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4785 return MonoResumeThread;
4787 thread->state &= ~ThreadState_SuspendRequested;
4788 thread->state |= ThreadState_Suspended;
4789 return KeepSuspended;
4792 mono_thread_set_interruption_requested (thread);
4793 if (data->interrupt)
4794 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4796 return MonoResumeThread;
4800 /* LOCKING: called with @thread synch_cs held, and releases it */
4802 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4804 SuspendThreadData data;
4806 g_assert (thread != mono_thread_internal_current ());
4808 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4810 thread->self_suspended = FALSE;
4812 data.thread = thread;
4813 data.interrupt = interrupt;
4814 data.interrupt_token = NULL;
4816 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4817 if (data.interrupt_token)
4818 mono_thread_info_finish_interrupt (data.interrupt_token);
4820 UNLOCK_THREAD (thread);
4823 /* LOCKING: called with @thread synch_cs held, and releases it */
4825 self_suspend_internal (void)
4827 MonoInternalThread *thread;
4829 MonoOSEventWaitRet res;
4831 thread = mono_thread_internal_current ();
4833 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4835 thread->self_suspended = TRUE;
4837 thread->state &= ~ThreadState_SuspendRequested;
4838 thread->state |= ThreadState_Suspended;
4840 UNLOCK_THREAD (thread);
4842 event = thread->suspended;
4845 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4846 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4851 suspend_for_shutdown_async_call (gpointer unused)
4854 mono_thread_info_yield ();
4857 static SuspendThreadResult
4858 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4860 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4861 return MonoResumeThread;
4865 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4867 g_assert (thread != mono_thread_internal_current ());
4869 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4873 * mono_thread_is_foreign:
4874 * \param thread the thread to query
4876 * This function allows one to determine if a thread was created by the mono runtime and has
4877 * a well defined lifecycle or it's a foreign one, created by the native environment.
4879 * \returns TRUE if \p thread was not created by the runtime.
4882 mono_thread_is_foreign (MonoThread *thread)
4884 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4885 return info->runtime_thread == FALSE;
4889 * mono_add_joinable_thread:
4891 * Add TID to the list of joinable threads.
4892 * LOCKING: Acquires the threads lock.
4895 mono_threads_add_joinable_thread (gpointer tid)
4899 * We cannot detach from threads because it causes problems like
4900 * 2fd16f60/r114307. So we collect them and join them when
4901 * we have time (in he finalizer thread).
4903 joinable_threads_lock ();
4904 if (!joinable_threads)
4905 joinable_threads = g_hash_table_new (NULL, NULL);
4906 g_hash_table_insert (joinable_threads, tid, tid);
4907 joinable_thread_count ++;
4908 joinable_threads_unlock ();
4910 mono_gc_finalize_notify ();
4915 * mono_threads_join_threads:
4917 * Join all joinable threads. This is called from the finalizer thread.
4918 * LOCKING: Acquires the threads lock.
4921 mono_threads_join_threads (void)
4924 GHashTableIter iter;
4931 if (!joinable_thread_count)
4935 joinable_threads_lock ();
4937 if (g_hash_table_size (joinable_threads)) {
4938 g_hash_table_iter_init (&iter, joinable_threads);
4939 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4940 thread = (pthread_t)tid;
4941 g_hash_table_remove (joinable_threads, key);
4942 joinable_thread_count --;
4945 joinable_threads_unlock ();
4947 if (thread != pthread_self ()) {
4949 /* This shouldn't block */
4950 mono_threads_join_lock ();
4951 mono_native_thread_join (thread);
4952 mono_threads_join_unlock ();
4965 * Wait for thread TID to exit.
4966 * LOCKING: Acquires the threads lock.
4969 mono_thread_join (gpointer tid)
4973 gboolean found = FALSE;
4975 joinable_threads_lock ();
4976 if (!joinable_threads)
4977 joinable_threads = g_hash_table_new (NULL, NULL);
4978 if (g_hash_table_lookup (joinable_threads, tid)) {
4979 g_hash_table_remove (joinable_threads, tid);
4980 joinable_thread_count --;
4983 joinable_threads_unlock ();
4986 thread = (pthread_t)tid;
4988 mono_native_thread_join (thread);
4994 mono_thread_internal_unhandled_exception (MonoObject* exc)
4996 MonoClass *klass = exc->vtable->klass;
4997 if (is_threadabort_exception (klass)) {
4998 mono_thread_internal_reset_abort (mono_thread_internal_current ());
4999 } else if (!is_appdomainunloaded_exception (klass)
5000 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5001 mono_unhandled_exception (exc);
5002 if (mono_environment_exitcode_get () == 1) {
5003 mono_environment_exitcode_set (255);
5004 mono_invoke_unhandled_exception_hook (exc);
5005 g_assert_not_reached ();
5011 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5014 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5015 mono_error_set_pending_exception (&error);
5019 * mono_threads_attach_coop: called by native->managed wrappers
5023 * - @return: the original domain which needs to be restored, or NULL.
5026 * - @dummy: contains the original domain
5027 * - @return: a cookie containing current MonoThreadInfo*.
5030 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5033 gboolean fresh_thread = FALSE;
5036 /* Happens when called from AOTed code which is only used in the root domain. */
5037 domain = mono_get_root_domain ();
5042 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5043 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5044 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5045 * we're only responsible for making the cookie. */
5046 if (mono_threads_is_coop_enabled ()) {
5047 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5048 fresh_thread = !info || !mono_thread_info_is_live (info);
5051 if (!mono_thread_internal_current ()) {
5052 mono_thread_attach_full (domain, FALSE);
5055 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5058 orig = mono_domain_get ();
5060 mono_domain_set (domain, TRUE);
5062 if (!mono_threads_is_coop_enabled ())
5063 return orig != domain ? orig : NULL;
5067 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5068 * return the right cookie. */
5069 return mono_threads_enter_gc_unsafe_region_cookie ();
5072 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5073 return mono_threads_enter_gc_unsafe_region (dummy);
5078 * mono_threads_detach_coop: called by native->managed wrappers
5081 * - @cookie: the original domain which needs to be restored, or NULL.
5085 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5086 * - @dummy: contains the original domain
5089 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5091 MonoDomain *domain, *orig;
5093 if (!mono_threads_is_coop_enabled ()) {
5094 orig = (MonoDomain*) cookie;
5096 mono_domain_set (orig, TRUE);
5098 orig = (MonoDomain*) *dummy;
5100 domain = mono_domain_get ();
5103 /* it won't do anything if cookie is NULL
5104 * thread state RUNNING -> (RUNNING|BLOCKING) */
5105 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5107 if (orig != domain) {
5109 mono_domain_unset ();
5111 mono_domain_set (orig, TRUE);
5117 /* Returns TRUE if the current thread is ready to be interrupted. */
5119 mono_threads_is_ready_to_be_interrupted (void)
5121 MonoInternalThread *thread;
5123 thread = mono_thread_internal_current ();
5124 LOCK_THREAD (thread);
5125 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5126 UNLOCK_THREAD (thread);
5130 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5131 UNLOCK_THREAD (thread);
5135 UNLOCK_THREAD (thread);
5141 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5143 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5145 if (internal->thread_info) {
5146 g_string_append (text, ", state : ");
5147 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5150 if (internal->owned_mutexes) {
5153 g_string_append (text, ", owns : [");
5154 for (i = 0; i < internal->owned_mutexes->len; i++)
5155 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5156 g_string_append (text, "]");
5161 mono_thread_internal_is_current (MonoInternalThread *internal)
5163 g_assert (internal);
5164 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));