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(HOST_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
66 #define USE_TKILL_ON_ANDROID 1
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(idx, off, ty) \
466 ((SpecialStaticOffset) { .fields = { .index = (idx), .offset = (off), .type = (ty) } }.raw)
467 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
468 (((SpecialStaticOffset *) &(x))->fields.f)
471 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
473 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
475 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
476 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
478 return ((char *) thread->static_data [idx]) + off;
482 get_context_static_data (MonoAppContext *ctx, guint32 offset)
484 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
486 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
487 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
489 return ((char *) ctx->static_data [idx]) + off;
493 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
495 static MonoClassField *current_thread_field = NULL;
499 if (!current_thread_field) {
500 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
501 g_assert (current_thread_field);
504 mono_class_vtable (domain, mono_defaults.thread_class);
505 mono_domain_lock (domain);
506 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
507 mono_domain_unlock (domain);
510 return (MonoThread **)get_thread_static_data (thread, offset);
514 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
516 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
518 g_assert (current->obj.vtable->domain == domain);
520 g_assert (!*current_thread_ptr);
521 *current_thread_ptr = current;
525 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
531 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
534 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
535 /* only possible failure mode is OOM, from which we don't expect to recover. */
536 mono_error_assert_ok (&error);
538 MONO_OBJECT_SETREF (thread, internal_thread, internal);
543 static MonoInternalThread*
544 create_internal_thread_object (void)
547 MonoInternalThread *thread;
550 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
551 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
552 /* only possible failure mode is OOM, from which we don't exect to recover */
553 mono_error_assert_ok (&error);
555 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
556 mono_coop_mutex_init_recursive (thread->synch_cs);
558 thread->apartment_state = ThreadApartmentState_Unknown;
559 thread->managed_id = get_next_managed_thread_id ();
560 if (mono_gc_is_moving ()) {
561 thread->thread_pinning_ref = thread;
562 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
565 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
567 thread->suspended = g_new0 (MonoOSEvent, 1);
568 mono_os_event_init (thread->suspended, TRUE);
574 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
578 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
579 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
580 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
585 g_assert (internal->native_handle);
587 res = SetThreadPriority (internal->native_handle, priority - 2);
589 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
590 #else /* HOST_WIN32 */
593 struct sched_param param;
596 tid = thread_get_tid (internal);
598 res = pthread_getschedparam (tid, &policy, ¶m);
600 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
602 #ifdef _POSIX_PRIORITY_SCHEDULING
605 /* Necessary to get valid priority range */
607 min = sched_get_priority_min (policy);
608 max = sched_get_priority_max (policy);
610 if (max > 0 && min >= 0 && max > min) {
611 double srange, drange, sposition, dposition;
612 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
614 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
615 dposition = (sposition / srange) * drange;
616 param.sched_priority = (int)(dposition + min);
623 param.sched_priority = 50;
629 param.sched_priority = 0;
632 g_warning ("%s: unknown policy %d", __func__, policy);
637 res = pthread_setschedparam (tid, policy, ¶m);
640 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
643 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
645 #endif /* HOST_WIN32 */
649 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
652 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain)
654 MonoThreadInfo *info;
655 MonoInternalThread *internal;
656 MonoDomain *domain, *root_domain;
660 info = mono_thread_info_current ();
663 internal = thread->internal_thread;
666 /* It is needed to store the MonoInternalThread on the MonoThreadInfo, because of the following case:
667 * - the MonoInternalThread TLS key is destroyed: set it to NULL
668 * - the MonoThreadInfo TLS key is destroyed: calls mono_thread_info_detach
669 * - it calls MonoThreadInfoCallbacks.thread_detach
670 * - mono_thread_internal_current returns NULL -> fails to detach the MonoInternalThread. */
671 mono_thread_info_set_internal_thread_gchandle (info, mono_gchandle_new ((MonoObject*) internal, FALSE));
673 internal->handle = mono_threads_open_thread_handle (info->handle);
675 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
677 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
678 internal->thread_info = info;
679 internal->small_id = info->small_id;
681 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
683 SET_CURRENT_OBJECT (internal);
685 domain = mono_object_domain (thread);
687 mono_thread_push_appdomain_ref (domain);
688 if (!mono_domain_set (domain, force_domain)) {
689 mono_thread_pop_appdomain_ref ();
693 mono_threads_lock ();
695 if (threads_starting_up)
696 mono_g_hash_table_remove (threads_starting_up, thread);
698 if (shutting_down && !force_attach) {
699 mono_threads_unlock ();
700 mono_thread_pop_appdomain_ref ();
705 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
708 /* We don't need to duplicate thread->handle, because it is
709 * only closed when the thread object is finalized by the GC. */
710 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
712 /* We have to do this here because mono_thread_start_cb
713 * requires that root_domain_thread is set up. */
714 if (thread_static_info.offset || thread_static_info.idx > 0) {
715 /* get the current allocated size */
716 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
717 mono_alloc_static_data (&internal->static_data, offset, TRUE);
720 mono_threads_unlock ();
722 root_domain = mono_get_root_domain ();
724 g_assert (!internal->root_domain_thread);
725 if (domain != root_domain)
726 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
728 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
730 if (domain != root_domain)
731 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
733 set_current_thread_for_domain (domain, internal, thread);
735 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
741 mono_thread_detach_internal (MonoInternalThread *thread)
745 g_assert (thread != NULL);
746 SET_CURRENT_OBJECT (thread);
748 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
751 mono_w32mutex_abandon ();
754 if (thread->abort_state_handle) {
755 mono_gchandle_free (thread->abort_state_handle);
756 thread->abort_state_handle = 0;
759 thread->abort_exc = NULL;
760 thread->current_appcontext = NULL;
763 * thread->synch_cs can be NULL if this was called after
764 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
765 * This can happen only during shutdown.
766 * The shutting_down flag is not always set, so we can't assert on it.
768 if (thread->synch_cs)
769 LOCK_THREAD (thread);
771 thread->state |= ThreadState_Stopped;
772 thread->state &= ~ThreadState_Background;
774 if (thread->synch_cs)
775 UNLOCK_THREAD (thread);
778 An interruption request has leaked to cleanup. Adjust the global counter.
780 This can happen is the abort source thread finds the abortee (this) thread
781 in unmanaged code. If this thread never trips back to managed code or check
782 the local flag it will be left set and positively unbalance the global counter.
784 Leaving the counter unbalanced will cause a performance degradation since all threads
785 will now keep checking their local flags all the time.
787 mono_thread_clear_interruption_requested (thread);
789 mono_threads_lock ();
793 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
794 /* We have to check whether the thread object for the
795 * tid is still the same in the table because the
796 * thread might have been destroyed and the tid reused
797 * in the meantime, in which case the tid would be in
798 * the table, but with another thread object.
802 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
806 mono_threads_unlock ();
808 /* Don't close the handle here, wait for the object finalizer
809 * to do it. Otherwise, the following race condition applies:
811 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
813 * 2) Some other handle is reassigned the same slot
815 * 3) Another thread tries to join the first thread, and
816 * blocks waiting for the reassigned handle to be signalled
817 * (which might never happen). This is possible, because the
818 * thread calling Join() still has a reference to the first
822 /* if the thread is not in the hash it has been removed already */
824 mono_domain_unset ();
825 mono_memory_barrier ();
827 if (mono_thread_cleanup_fn)
828 mono_thread_cleanup_fn (thread_get_tid (thread));
833 mono_release_type_locks (thread);
835 /* Can happen when we attach the profiler helper thread in order to heapshot. */
836 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
837 MONO_PROFILER_RAISE (thread_stopped, (thread->tid));
839 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
842 * This will signal async signal handlers that the thread has exited.
843 * The profiler callback needs this to be set, so it cannot be done earlier.
845 mono_domain_unset ();
846 mono_memory_barrier ();
848 if (thread == mono_thread_internal_current ())
849 mono_thread_pop_appdomain_ref ();
851 mono_free_static_data (thread->static_data);
852 thread->static_data = NULL;
853 ref_stack_destroy (thread->appdomain_refs);
854 thread->appdomain_refs = NULL;
856 g_assert (thread->suspended);
857 mono_os_event_destroy (thread->suspended);
858 g_free (thread->suspended);
859 thread->suspended = NULL;
861 if (mono_thread_cleanup_fn)
862 mono_thread_cleanup_fn (thread_get_tid (thread));
864 mono_memory_barrier ();
866 if (mono_gc_is_moving ()) {
867 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
868 thread->thread_pinning_ref = NULL;
872 SET_CURRENT_OBJECT (NULL);
873 mono_domain_unset ();
875 mono_thread_info_unset_internal_thread_gchandle ((MonoThreadInfo*) thread->thread_info);
877 /* Don't need to close the handle to this thread, even though we took a
878 * reference in mono_thread_attach (), because the GC will do it
879 * when the Thread object is finalised.
886 MonoObject *start_delegate;
887 MonoObject *start_delegate_arg;
888 MonoThreadStart start_func;
889 gpointer start_func_arg;
890 gboolean force_attach;
892 MonoCoopSem registered;
895 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
898 MonoThreadStart start_func;
899 void *start_func_arg;
902 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
906 MonoInternalThread *internal;
907 MonoObject *start_delegate;
908 MonoObject *start_delegate_arg;
911 thread = start_info->thread;
912 internal = thread->internal_thread;
913 domain = mono_object_domain (start_info->thread);
915 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
917 if (!mono_thread_attach_internal (thread, start_info->force_attach, FALSE)) {
918 start_info->failed = TRUE;
920 mono_coop_sem_post (&start_info->registered);
922 if (InterlockedDecrement (&start_info->ref) == 0) {
923 mono_coop_sem_destroy (&start_info->registered);
930 mono_thread_internal_set_priority (internal, internal->priority);
934 start_delegate = start_info->start_delegate;
935 start_delegate_arg = start_info->start_delegate_arg;
936 start_func = start_info->start_func;
937 start_func_arg = start_info->start_func_arg;
939 /* This MUST be called before any managed code can be
940 * executed, as it calls the callback function that (for the
941 * jit) sets the lmf marker.
944 if (mono_thread_start_cb)
945 mono_thread_start_cb (tid, stack_ptr, start_func);
947 /* On 2.0 profile (and higher), set explicitly since state might have been
949 if (internal->apartment_state == ThreadApartmentState_Unknown)
950 internal->apartment_state = ThreadApartmentState_MTA;
952 mono_thread_init_apartment_state ();
954 /* Let the thread that called Start() know we're ready */
955 mono_coop_sem_post (&start_info->registered);
957 if (InterlockedDecrement (&start_info->ref) == 0) {
958 mono_coop_sem_destroy (&start_info->registered);
962 /* start_info is not valid anymore */
966 * Call this after calling start_notify, since the profiler callback might want
967 * to lock the thread, and the lock is held by thread_start () which waits for
970 MONO_PROFILER_RAISE (thread_started, (tid));
972 /* if the name was set before starting, we didn't invoke the profiler callback */
973 if (internal->name) {
974 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
975 MONO_PROFILER_RAISE (thread_name, (internal->tid, tname));
976 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
980 /* start_func is set only for unmanaged start functions */
982 start_func (start_func_arg);
986 g_assert (start_delegate != NULL);
988 /* we may want to handle the exception here. See comment below on unhandled exceptions */
989 args [0] = (gpointer) start_delegate_arg;
990 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
992 if (!mono_error_ok (&error)) {
993 MonoException *ex = mono_error_convert_to_exception (&error);
995 g_assert (ex != NULL);
996 MonoClass *klass = mono_object_get_class (&ex->object);
997 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
998 !is_threadabort_exception (klass)) {
999 mono_unhandled_exception (&ex->object);
1000 mono_invoke_unhandled_exception_hook (&ex->object);
1001 g_assert_not_reached ();
1004 mono_error_cleanup (&error);
1008 /* If the thread calls ExitThread at all, this remaining code
1009 * will not be executed, but the main thread will eventually
1010 * call mono_thread_detach_internal() on this thread's behalf.
1013 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
1015 /* Do any cleanup needed for apartment state. This
1016 * cannot be done in mono_thread_detach_internal since
1017 * mono_thread_detach_internal could be called for a
1018 * thread other than the current thread.
1019 * mono_thread_cleanup_apartment_state cleans up apartment
1020 * for the current thead */
1021 mono_thread_cleanup_apartment_state ();
1023 mono_thread_detach_internal (internal);
1031 start_wrapper (gpointer data)
1033 StartInfo *start_info;
1034 MonoThreadInfo *info;
1037 start_info = (StartInfo*) data;
1038 g_assert (start_info);
1040 info = mono_thread_info_attach ();
1041 info->runtime_thread = TRUE;
1043 /* Run the actual main function of the thread */
1044 res = start_wrapper_internal (start_info, info->stack_end);
1046 mono_thread_info_exit (res);
1048 g_assert_not_reached ();
1054 * Common thread creation code.
1055 * LOCKING: Acquires the threads lock.
1058 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
1059 MonoThreadCreateFlags flags, MonoError *error)
1061 StartInfo *start_info = NULL;
1062 MonoNativeThreadId tid;
1064 gsize stack_set_size;
1067 g_assert (!start_func && !start_func_arg);
1069 g_assert (!start_delegate);
1071 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
1072 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
1073 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1075 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
1076 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
1077 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1081 * Join joinable threads to prevent running out of threads since the finalizer
1082 * thread might be blocked/backlogged.
1084 mono_threads_join_threads ();
1088 mono_threads_lock ();
1089 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
1090 mono_threads_unlock ();
1093 if (threads_starting_up == NULL) {
1094 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
1096 mono_g_hash_table_insert (threads_starting_up, thread, thread);
1097 mono_threads_unlock ();
1099 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
1100 if (internal->threadpool_thread)
1101 mono_thread_set_state (internal, ThreadState_Background);
1103 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
1105 start_info = g_new0 (StartInfo, 1);
1106 start_info->ref = 2;
1107 start_info->thread = thread;
1108 start_info->start_delegate = start_delegate;
1109 start_info->start_delegate_arg = thread->start_obj;
1110 start_info->start_func = start_func;
1111 start_info->start_func_arg = start_func_arg;
1112 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
1113 start_info->failed = FALSE;
1114 mono_coop_sem_init (&start_info->registered, 0);
1116 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
1117 stack_set_size = default_stacksize_for_thread (internal);
1121 if (!mono_thread_platform_create_thread (start_wrapper, start_info, &stack_set_size, &tid)) {
1122 /* The thread couldn't be created, so set an exception */
1123 mono_threads_lock ();
1124 mono_g_hash_table_remove (threads_starting_up, thread);
1125 mono_threads_unlock ();
1126 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
1127 /* ref is not going to be decremented in start_wrapper_internal */
1128 InterlockedDecrement (&start_info->ref);
1133 internal->stack_size = (int) stack_set_size;
1135 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
1138 * Wait for the thread to set up its TLS data etc, so
1139 * theres no potential race condition if someone tries
1140 * to look up the data believing the thread has
1144 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
1146 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
1148 ret = !start_info->failed;
1151 if (InterlockedDecrement (&start_info->ref) == 0) {
1152 mono_coop_sem_destroy (&start_info->registered);
1153 g_free (start_info);
1160 * mono_thread_new_init:
1163 mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1165 if (mono_thread_start_cb) {
1166 mono_thread_start_cb (tid, stack_start, func);
1171 * mono_threads_set_default_stacksize:
1174 mono_threads_set_default_stacksize (guint32 stacksize)
1176 default_stacksize = stacksize;
1180 * mono_threads_get_default_stacksize:
1183 mono_threads_get_default_stacksize (void)
1185 return default_stacksize;
1189 * mono_thread_create_internal:
1191 * ARG should not be a GC reference.
1194 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1197 MonoInternalThread *internal;
1202 internal = create_internal_thread_object ();
1204 thread = create_thread_object (domain, internal);
1206 LOCK_THREAD (internal);
1208 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1210 UNLOCK_THREAD (internal);
1212 return_val_if_nok (error, NULL);
1217 * mono_thread_create:
1220 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1223 if (!mono_thread_create_checked (domain, func, arg, &error))
1224 mono_error_cleanup (&error);
1228 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1230 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1234 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1236 MonoInternalThread *internal;
1238 MonoThreadInfo *info;
1239 MonoNativeThreadId tid;
1241 if (mono_thread_internal_current_is_attached ()) {
1242 if (domain != mono_domain_get ())
1243 mono_domain_set (domain, TRUE);
1244 /* Already attached */
1245 return mono_thread_current ();
1248 info = mono_thread_info_attach ();
1251 tid=mono_native_thread_id_get ();
1253 internal = create_internal_thread_object ();
1255 thread = create_thread_object (domain, internal);
1257 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1258 /* Mono is shutting down, so just wait for the end */
1260 mono_thread_info_sleep (10000, NULL);
1263 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1265 if (mono_thread_attach_cb)
1266 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), info->stack_end);
1268 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1269 if (!mono_thread_info_current ()->tools_thread)
1270 MONO_PROFILER_RAISE (thread_started, (MONO_NATIVE_THREAD_ID_TO_UINT (tid)));
1276 * mono_thread_attach:
1279 mono_thread_attach (MonoDomain *domain)
1281 return mono_thread_attach_full (domain, FALSE);
1285 * mono_thread_detach:
1288 mono_thread_detach (MonoThread *thread)
1291 mono_thread_detach_internal (thread->internal_thread);
1295 * mono_thread_detach_if_exiting:
1297 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1298 * This should be used at the end of embedding code which calls into managed code, and which
1299 * can be called from pthread dtors, like <code>dealloc:</code> implementations in Objective-C.
1302 mono_thread_detach_if_exiting (void)
1304 if (mono_thread_info_is_exiting ()) {
1305 MonoInternalThread *thread;
1307 thread = mono_thread_internal_current ();
1309 mono_thread_detach_internal (thread);
1310 mono_thread_info_detach ();
1318 mono_thread_internal_current_is_attached (void)
1320 MonoInternalThread *internal;
1322 internal = GET_CURRENT_OBJECT ();
1333 mono_thread_exit (void)
1335 MonoInternalThread *thread = mono_thread_internal_current ();
1337 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1339 mono_thread_detach_internal (thread);
1341 /* we could add a callback here for embedders to use. */
1342 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1343 exit (mono_environment_exitcode_get ());
1345 mono_thread_info_exit (0);
1349 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1351 MonoInternalThread *internal;
1353 internal = create_internal_thread_object ();
1355 internal->state = ThreadState_Unstarted;
1357 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1361 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1363 return mono_thread_current ();
1367 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1371 MonoInternalThread *internal;
1374 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1376 if (!this_obj->internal_thread)
1377 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1378 internal = this_obj->internal_thread;
1380 LOCK_THREAD (internal);
1382 if ((internal->state & ThreadState_Unstarted) == 0) {
1383 UNLOCK_THREAD (internal);
1384 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1388 if ((internal->state & ThreadState_Aborted) != 0) {
1389 UNLOCK_THREAD (internal);
1393 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1395 mono_error_cleanup (&error);
1396 UNLOCK_THREAD (internal);
1400 internal->state &= ~ThreadState_Unstarted;
1402 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1404 UNLOCK_THREAD (internal);
1405 return internal->handle;
1409 * This is called from the finalizer of the internal thread object.
1412 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1414 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1417 * Since threads keep a reference to their thread object while running, by
1418 * the time this function is called, the thread has already exited/detached,
1419 * i.e. mono_thread_detach_internal () has ran. The exception is during
1420 * shutdown, when mono_thread_detach_internal () can be called after this.
1422 if (this_obj->handle) {
1423 mono_threads_close_thread_handle (this_obj->handle);
1424 this_obj->handle = NULL;
1428 CloseHandle (this_obj->native_handle);
1431 if (this_obj->synch_cs) {
1432 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1433 this_obj->synch_cs = NULL;
1434 mono_coop_mutex_destroy (synch_cs);
1438 if (this_obj->name) {
1439 void *name = this_obj->name;
1440 this_obj->name = NULL;
1446 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1449 MonoInternalThread *thread = mono_thread_internal_current ();
1451 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1453 if (mono_thread_current_check_pending_interrupt ())
1457 gboolean alerted = FALSE;
1459 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1461 res = mono_thread_info_sleep (ms, &alerted);
1463 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1466 MonoException* exc = mono_thread_execute_interruption ();
1468 mono_raise_exception (exc);
1470 // FIXME: !MONO_INFINITE_WAIT
1471 if (ms != MONO_INFINITE_WAIT)
1480 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1485 ves_icall_System_Threading_Thread_GetDomainID (void)
1487 return mono_domain_get()->domain_id;
1491 ves_icall_System_Threading_Thread_Yield (void)
1493 return mono_thread_info_yield ();
1497 * mono_thread_get_name:
1499 * Return the name of the thread. NAME_LEN is set to the length of the name.
1500 * Return NULL if the thread has no name. The returned memory is owned by the
1504 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1508 LOCK_THREAD (this_obj);
1510 if (!this_obj->name) {
1514 *name_len = this_obj->name_len;
1515 res = g_new (gunichar2, this_obj->name_len);
1516 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1519 UNLOCK_THREAD (this_obj);
1525 * mono_thread_get_name_utf8:
1526 * \returns the name of the thread in UTF-8.
1527 * Return NULL if the thread has no name.
1528 * The returned memory is owned by the caller.
1531 mono_thread_get_name_utf8 (MonoThread *thread)
1536 MonoInternalThread *internal = thread->internal_thread;
1537 if (internal == NULL)
1540 LOCK_THREAD (internal);
1542 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1544 UNLOCK_THREAD (internal);
1550 * mono_thread_get_managed_id:
1551 * \returns the \c Thread.ManagedThreadId value of \p thread.
1552 * Returns \c -1 if \p thread is NULL.
1555 mono_thread_get_managed_id (MonoThread *thread)
1560 MonoInternalThread *internal = thread->internal_thread;
1561 if (internal == NULL)
1564 int32_t id = internal->managed_id;
1570 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1575 error_init (&error);
1577 LOCK_THREAD (this_obj);
1579 if (!this_obj->name)
1582 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1584 UNLOCK_THREAD (this_obj);
1586 if (mono_error_set_pending_exception (&error))
1593 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1595 LOCK_THREAD (this_obj);
1600 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1601 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1602 UNLOCK_THREAD (this_obj);
1604 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1607 if (this_obj->name) {
1608 g_free (this_obj->name);
1609 this_obj->name_len = 0;
1612 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1613 this_obj->name_len = mono_string_length (name);
1616 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1619 this_obj->name = NULL;
1622 UNLOCK_THREAD (this_obj);
1624 if (this_obj->name && this_obj->tid) {
1625 char *tname = mono_string_to_utf8_checked (name, error);
1626 return_if_nok (error);
1627 MONO_PROFILER_RAISE (thread_name, (this_obj->tid, tname));
1628 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1634 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1637 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1638 mono_error_set_pending_exception (&error);
1642 * ves_icall_System_Threading_Thread_GetPriority_internal:
1643 * @param this_obj: The MonoInternalThread on which to operate.
1645 * Gets the priority of the given thread.
1646 * @return: The priority of the given thread.
1649 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1652 MonoInternalThread *internal = this_obj->internal_thread;
1654 LOCK_THREAD (internal);
1655 priority = internal->priority;
1656 UNLOCK_THREAD (internal);
1662 * ves_icall_System_Threading_Thread_SetPriority_internal:
1663 * @param this_obj: The MonoInternalThread on which to operate.
1664 * @param priority: The priority to set.
1666 * Sets the priority of the given thread.
1669 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1671 MonoInternalThread *internal = this_obj->internal_thread;
1673 LOCK_THREAD (internal);
1674 internal->priority = priority;
1675 if (internal->thread_info != NULL)
1676 mono_thread_internal_set_priority (internal, priority);
1677 UNLOCK_THREAD (internal);
1680 /* If the array is already in the requested domain, we just return it,
1681 otherwise we return a copy in that domain. */
1683 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1691 if (mono_object_domain (arr) == domain)
1694 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1695 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1700 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1703 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1704 mono_error_set_pending_exception (&error);
1709 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1712 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1713 mono_error_set_pending_exception (&error);
1718 * mono_thread_current:
1721 mono_thread_current (void)
1723 MonoDomain *domain = mono_domain_get ();
1724 MonoInternalThread *internal = mono_thread_internal_current ();
1725 MonoThread **current_thread_ptr;
1727 g_assert (internal);
1728 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1730 if (!*current_thread_ptr) {
1731 g_assert (domain != mono_get_root_domain ());
1732 *current_thread_ptr = create_thread_object (domain, internal);
1734 return *current_thread_ptr;
1737 /* Return the thread object belonging to INTERNAL in the current domain */
1739 mono_thread_current_for_thread (MonoInternalThread *internal)
1741 MonoDomain *domain = mono_domain_get ();
1742 MonoThread **current_thread_ptr;
1744 g_assert (internal);
1745 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1747 if (!*current_thread_ptr) {
1748 g_assert (domain != mono_get_root_domain ());
1749 *current_thread_ptr = create_thread_object (domain, internal);
1751 return *current_thread_ptr;
1755 mono_thread_internal_current (void)
1757 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1758 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1762 static MonoThreadInfoWaitRet
1763 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1766 MonoThreadInfoWaitRet ret;
1773 start = (ms == -1) ? 0 : mono_msec_ticks ();
1776 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1779 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1782 exc = mono_thread_execute_interruption ();
1784 mono_error_set_exception_instance (error, exc);
1791 /* Re-calculate ms according to the time passed */
1792 diff_ms = (gint32)(mono_msec_ticks () - start);
1793 if (diff_ms >= ms) {
1794 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1797 wait = ms - diff_ms;
1804 ves_icall_System_Threading_Thread_Join_internal (MonoThread *this_obj, int ms)
1806 MonoInternalThread *thread = this_obj->internal_thread;
1807 MonoThreadHandle *handle = thread->handle;
1808 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1812 if (mono_thread_current_check_pending_interrupt ())
1815 LOCK_THREAD (thread);
1817 if ((thread->state & ThreadState_Unstarted) != 0) {
1818 UNLOCK_THREAD (thread);
1820 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1824 MonoNativeThreadId tid = thread_get_tid (thread);
1826 UNLOCK_THREAD (thread);
1829 ms = MONO_INFINITE_WAIT;
1830 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1832 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1834 ret = mono_join_uninterrupted (handle, ms, &error);
1836 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1838 mono_error_set_pending_exception (&error);
1840 if (ret == MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1841 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1843 /* Wait for the thread to really exit */
1845 /* This shouldn't block */
1846 mono_threads_join_lock ();
1847 mono_native_thread_join (tid);
1848 mono_threads_join_unlock ();
1854 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1859 #define MANAGED_WAIT_FAILED 0x7fffffff
1862 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1864 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1865 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1866 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1867 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1868 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1869 return WAIT_IO_COMPLETION;
1870 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1871 return WAIT_TIMEOUT;
1872 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1873 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1874 return MANAGED_WAIT_FAILED;
1876 g_error ("%s: unknown val value %d", __func__, val);
1881 ves_icall_System_Threading_WaitHandle_Wait_internal (gpointer *handles, gint32 numhandles, MonoBoolean waitall, gint32 timeout, MonoError *error)
1883 MonoW32HandleWaitRet ret;
1884 MonoInternalThread *thread;
1887 guint32 timeoutLeft;
1889 /* Do this WaitSleepJoin check before creating objects */
1890 if (mono_thread_current_check_pending_interrupt ())
1891 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1893 thread = mono_thread_internal_current ();
1895 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1898 timeout = MONO_INFINITE_WAIT;
1899 if (timeout != MONO_INFINITE_WAIT)
1900 start = mono_msec_ticks ();
1902 timeoutLeft = timeout;
1907 if (numhandles != 1)
1908 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, timeoutLeft, TRUE), numhandles);
1910 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], timeoutLeft, TRUE), 1);
1912 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1913 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, timeoutLeft, TRUE);
1914 #endif /* HOST_WIN32 */
1917 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1920 exc = mono_thread_execute_interruption ();
1922 mono_error_set_exception_instance (error, exc);
1926 if (timeout != MONO_INFINITE_WAIT) {
1929 elapsed = mono_msec_ticks () - start;
1930 if (elapsed >= timeout) {
1931 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1935 timeoutLeft = timeout - elapsed;
1939 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1941 return map_native_wait_result_to_managed (ret, numhandles);
1945 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (gpointer toSignal, gpointer toWait, gint32 ms, MonoError *error)
1947 MonoW32HandleWaitRet ret;
1948 MonoInternalThread *thread = mono_thread_internal_current ();
1951 ms = MONO_INFINITE_WAIT;
1953 if (mono_thread_current_check_pending_interrupt ())
1954 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1956 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1960 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
1962 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
1966 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1968 return map_native_wait_result_to_managed (ret, 1);
1971 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1973 return InterlockedIncrement (location);
1976 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1978 #if SIZEOF_VOID_P == 4
1979 if (G_UNLIKELY ((size_t)location & 0x7)) {
1981 mono_interlocked_lock ();
1984 mono_interlocked_unlock ();
1988 return InterlockedIncrement64 (location);
1991 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1993 return InterlockedDecrement(location);
1996 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1998 #if SIZEOF_VOID_P == 4
1999 if (G_UNLIKELY ((size_t)location & 0x7)) {
2001 mono_interlocked_lock ();
2004 mono_interlocked_unlock ();
2008 return InterlockedDecrement64 (location);
2011 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2013 return InterlockedExchange(location, value);
2016 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2019 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2020 mono_gc_wbarrier_generic_nostore (location);
2024 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2026 return InterlockedExchangePointer(location, value);
2029 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2031 IntFloatUnion val, ret;
2034 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2040 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2042 #if SIZEOF_VOID_P == 4
2043 if (G_UNLIKELY ((size_t)location & 0x7)) {
2045 mono_interlocked_lock ();
2048 mono_interlocked_unlock ();
2052 return InterlockedExchange64 (location, value);
2056 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2058 LongDoubleUnion val, ret;
2061 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2066 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2068 return InterlockedCompareExchange(location, value, comparand);
2071 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2073 gint32 r = InterlockedCompareExchange(location, value, comparand);
2074 *success = r == comparand;
2078 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2081 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2082 mono_gc_wbarrier_generic_nostore (location);
2086 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2088 return InterlockedCompareExchangePointer(location, value, comparand);
2091 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2093 IntFloatUnion val, ret, cmp;
2096 cmp.fval = comparand;
2097 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2103 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2105 #if SIZEOF_VOID_P == 8
2106 LongDoubleUnion val, comp, ret;
2109 comp.fval = comparand;
2110 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2116 mono_interlocked_lock ();
2118 if (old == comparand)
2120 mono_interlocked_unlock ();
2127 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2129 #if SIZEOF_VOID_P == 4
2130 if (G_UNLIKELY ((size_t)location & 0x7)) {
2132 mono_interlocked_lock ();
2134 if (old == comparand)
2136 mono_interlocked_unlock ();
2140 return InterlockedCompareExchange64 (location, value, comparand);
2144 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2147 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2148 mono_gc_wbarrier_generic_nostore (location);
2153 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2156 MONO_CHECK_NULL (location, NULL);
2157 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2158 mono_gc_wbarrier_generic_nostore (location);
2163 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2165 return InterlockedAdd (location, value);
2169 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2171 #if SIZEOF_VOID_P == 4
2172 if (G_UNLIKELY ((size_t)location & 0x7)) {
2174 mono_interlocked_lock ();
2177 mono_interlocked_unlock ();
2181 return InterlockedAdd64 (location, value);
2185 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2187 #if SIZEOF_VOID_P == 4
2188 if (G_UNLIKELY ((size_t)location & 0x7)) {
2190 mono_interlocked_lock ();
2192 mono_interlocked_unlock ();
2196 return InterlockedRead64 (location);
2200 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2202 mono_memory_barrier ();
2206 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2208 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2210 if (state & ThreadState_Background) {
2211 /* If the thread changes the background mode, the main thread has to
2212 * be notified, since it has to rebuild the list of threads to
2215 mono_os_event_set (&background_change_event);
2220 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2222 mono_thread_set_state (this_obj, (MonoThreadState)state);
2224 if (state & ThreadState_Background) {
2225 /* If the thread changes the background mode, the main thread has to
2226 * be notified, since it has to rebuild the list of threads to
2229 mono_os_event_set (&background_change_event);
2234 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2238 LOCK_THREAD (this_obj);
2240 state = this_obj->state;
2242 UNLOCK_THREAD (this_obj);
2247 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2249 MonoInternalThread *current;
2251 MonoInternalThread *thread = this_obj->internal_thread;
2253 LOCK_THREAD (thread);
2255 current = mono_thread_internal_current ();
2257 thread->thread_interrupt_requested = TRUE;
2258 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2260 UNLOCK_THREAD (thread);
2263 async_abort_internal (thread, FALSE);
2268 * mono_thread_current_check_pending_interrupt:
2269 * Checks if there's a interruption request and set the pending exception if so.
2270 * \returns true if a pending exception was set
2273 mono_thread_current_check_pending_interrupt (void)
2275 MonoInternalThread *thread = mono_thread_internal_current ();
2276 gboolean throw_ = FALSE;
2278 LOCK_THREAD (thread);
2280 if (thread->thread_interrupt_requested) {
2282 thread->thread_interrupt_requested = FALSE;
2285 UNLOCK_THREAD (thread);
2288 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2293 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2295 LOCK_THREAD (thread);
2297 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2299 UNLOCK_THREAD (thread);
2303 if ((thread->state & ThreadState_Unstarted) != 0) {
2304 thread->state |= ThreadState_Aborted;
2305 UNLOCK_THREAD (thread);
2309 thread->state |= ThreadState_AbortRequested;
2310 if (thread->abort_state_handle)
2311 mono_gchandle_free (thread->abort_state_handle);
2313 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2314 g_assert (thread->abort_state_handle);
2316 thread->abort_state_handle = 0;
2318 thread->abort_exc = NULL;
2320 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));
2322 /* During shutdown, we can't wait for other threads */
2324 /* Make sure the thread is awake */
2325 mono_thread_resume (thread);
2327 UNLOCK_THREAD (thread);
2332 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2334 if (!request_thread_abort (thread, state))
2337 if (thread == mono_thread_internal_current ()) {
2339 self_abort_internal (&error);
2340 mono_error_set_pending_exception (&error);
2342 async_abort_internal (thread, TRUE);
2347 * mono_thread_internal_abort:
2348 * Request thread \p thread to be aborted.
2349 * \p thread MUST NOT be the current thread.
2352 mono_thread_internal_abort (MonoInternalThread *thread)
2354 g_assert (thread != mono_thread_internal_current ());
2356 if (!request_thread_abort (thread, NULL))
2358 async_abort_internal (thread, TRUE);
2362 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2364 MonoInternalThread *thread = mono_thread_internal_current ();
2365 gboolean was_aborting;
2367 LOCK_THREAD (thread);
2368 was_aborting = thread->state & ThreadState_AbortRequested;
2369 thread->state &= ~ThreadState_AbortRequested;
2370 UNLOCK_THREAD (thread);
2372 if (!was_aborting) {
2373 const char *msg = "Unable to reset abort because no abort was requested";
2374 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2378 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2379 thread->abort_exc = NULL;
2380 if (thread->abort_state_handle) {
2381 mono_gchandle_free (thread->abort_state_handle);
2382 /* This is actually not necessary - the handle
2383 only counts if the exception is set */
2384 thread->abort_state_handle = 0;
2389 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2391 LOCK_THREAD (thread);
2393 thread->state &= ~ThreadState_AbortRequested;
2395 if (thread->abort_exc) {
2396 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2397 thread->abort_exc = NULL;
2398 if (thread->abort_state_handle) {
2399 mono_gchandle_free (thread->abort_state_handle);
2400 /* This is actually not necessary - the handle
2401 only counts if the exception is set */
2402 thread->abort_state_handle = 0;
2406 UNLOCK_THREAD (thread);
2410 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2413 MonoInternalThread *thread = this_obj->internal_thread;
2414 MonoObject *state, *deserialized = NULL;
2417 if (!thread->abort_state_handle)
2420 state = mono_gchandle_get_target (thread->abort_state_handle);
2423 domain = mono_domain_get ();
2424 if (mono_object_domain (state) == domain)
2427 deserialized = mono_object_xdomain_representation (state, domain, &error);
2429 if (!deserialized) {
2430 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2431 if (!is_ok (&error)) {
2432 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2433 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2435 mono_set_pending_exception (invalid_op_exc);
2439 return deserialized;
2443 mono_thread_suspend (MonoInternalThread *thread)
2445 LOCK_THREAD (thread);
2447 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2449 UNLOCK_THREAD (thread);
2453 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2455 UNLOCK_THREAD (thread);
2459 thread->state |= ThreadState_SuspendRequested;
2460 mono_os_event_reset (thread->suspended);
2462 if (thread == mono_thread_internal_current ()) {
2463 /* calls UNLOCK_THREAD (thread) */
2464 self_suspend_internal ();
2466 /* calls UNLOCK_THREAD (thread) */
2467 async_suspend_internal (thread, FALSE);
2474 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2476 if (!mono_thread_suspend (this_obj->internal_thread)) {
2477 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2482 /* LOCKING: LOCK_THREAD(thread) must be held */
2484 mono_thread_resume (MonoInternalThread *thread)
2486 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2487 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2488 thread->state &= ~ThreadState_SuspendRequested;
2489 mono_os_event_set (thread->suspended);
2493 if ((thread->state & ThreadState_Suspended) == 0 ||
2494 (thread->state & ThreadState_Unstarted) != 0 ||
2495 (thread->state & ThreadState_Aborted) != 0 ||
2496 (thread->state & ThreadState_Stopped) != 0)
2498 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2502 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2504 mono_os_event_set (thread->suspended);
2506 if (!thread->self_suspended) {
2507 UNLOCK_THREAD (thread);
2509 /* Awake the thread */
2510 if (!mono_thread_info_resume (thread_get_tid (thread)))
2513 LOCK_THREAD (thread);
2516 thread->state &= ~ThreadState_Suspended;
2522 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2524 if (!thread->internal_thread) {
2525 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2527 LOCK_THREAD (thread->internal_thread);
2528 if (!mono_thread_resume (thread->internal_thread))
2529 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2530 UNLOCK_THREAD (thread->internal_thread);
2535 mono_threads_is_critical_method (MonoMethod *method)
2537 switch (method->wrapper_type) {
2538 case MONO_WRAPPER_RUNTIME_INVOKE:
2539 case MONO_WRAPPER_XDOMAIN_INVOKE:
2540 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2547 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2552 if (mono_threads_is_critical_method (m)) {
2553 *((gboolean*)data) = TRUE;
2560 is_running_protected_wrapper (void)
2562 gboolean found = FALSE;
2563 mono_stack_walk (find_wrapper, &found);
2571 mono_thread_stop (MonoThread *thread)
2573 MonoInternalThread *internal = thread->internal_thread;
2575 if (!request_thread_abort (internal, NULL))
2578 if (internal == mono_thread_internal_current ()) {
2580 self_abort_internal (&error);
2582 This function is part of the embeding API and has no way to return the exception
2583 to be thrown. So what we do is keep the old behavior and raise the exception.
2585 mono_error_raise_exception (&error); /* OK to throw, see note */
2587 async_abort_internal (internal, TRUE);
2592 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2594 gint8 tmp = *(volatile gint8 *)ptr;
2595 mono_memory_barrier ();
2600 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2602 gint16 tmp = *(volatile gint16 *)ptr;
2603 mono_memory_barrier ();
2608 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2610 gint32 tmp = *(volatile gint32 *)ptr;
2611 mono_memory_barrier ();
2616 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2618 gint64 tmp = *(volatile gint64 *)ptr;
2619 mono_memory_barrier ();
2624 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2626 volatile void *tmp = *(volatile void **)ptr;
2627 mono_memory_barrier ();
2628 return (void *) tmp;
2632 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2634 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2635 mono_memory_barrier ();
2636 return (MonoObject *) tmp;
2640 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2642 double tmp = *(volatile double *)ptr;
2643 mono_memory_barrier ();
2648 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2650 float tmp = *(volatile float *)ptr;
2651 mono_memory_barrier ();
2656 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2658 return InterlockedRead8 ((volatile gint8 *)ptr);
2662 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2664 return InterlockedRead16 ((volatile gint16 *)ptr);
2668 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2670 return InterlockedRead ((volatile gint32 *)ptr);
2674 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2676 #if SIZEOF_VOID_P == 4
2677 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2679 mono_interlocked_lock ();
2680 val = *(gint64*)ptr;
2681 mono_interlocked_unlock ();
2685 return InterlockedRead64 ((volatile gint64 *)ptr);
2689 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2691 return InterlockedReadPointer ((volatile gpointer *)ptr);
2695 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2699 #if SIZEOF_VOID_P == 4
2700 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2702 mono_interlocked_lock ();
2703 val = *(double*)ptr;
2704 mono_interlocked_unlock ();
2709 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2715 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2719 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2725 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2727 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2731 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2733 mono_memory_barrier ();
2734 *(volatile gint8 *)ptr = value;
2738 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2740 mono_memory_barrier ();
2741 *(volatile gint16 *)ptr = value;
2745 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2747 mono_memory_barrier ();
2748 *(volatile gint32 *)ptr = value;
2752 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2754 mono_memory_barrier ();
2755 *(volatile gint64 *)ptr = value;
2759 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2761 mono_memory_barrier ();
2762 *(volatile void **)ptr = value;
2766 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2768 mono_memory_barrier ();
2769 mono_gc_wbarrier_generic_store (ptr, value);
2773 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2775 mono_memory_barrier ();
2776 *(volatile double *)ptr = value;
2780 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2782 mono_memory_barrier ();
2783 *(volatile float *)ptr = value;
2787 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2789 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2793 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2795 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2799 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2801 InterlockedWrite ((volatile gint32 *)ptr, value);
2805 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2807 #if SIZEOF_VOID_P == 4
2808 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2809 mono_interlocked_lock ();
2810 *(gint64*)ptr = value;
2811 mono_interlocked_unlock ();
2816 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2820 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2822 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2826 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2830 #if SIZEOF_VOID_P == 4
2831 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2832 mono_interlocked_lock ();
2833 *(double*)ptr = value;
2834 mono_interlocked_unlock ();
2841 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2845 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2851 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2855 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2857 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2861 free_context (void *user_data)
2863 ContextStaticData *data = user_data;
2865 mono_threads_lock ();
2868 * There is no guarantee that, by the point this reference queue callback
2869 * has been invoked, the GC handle associated with the object will fail to
2870 * resolve as one might expect. So if we don't free and remove the GC
2871 * handle here, free_context_static_data_helper () could end up resolving
2872 * a GC handle to an actually-dead context which would contain a pointer
2873 * to an already-freed static data segment, resulting in a crash when
2876 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2878 mono_threads_unlock ();
2880 mono_gchandle_free (data->gc_handle);
2881 mono_free_static_data (data->static_data);
2886 mono_threads_register_app_context (MonoAppContext *ctx, MonoError *error)
2889 mono_threads_lock ();
2891 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2894 contexts = g_hash_table_new (NULL, NULL);
2897 context_queue = mono_gc_reference_queue_new (free_context);
2899 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2900 g_hash_table_insert (contexts, gch, gch);
2903 * We use this intermediate structure to contain a duplicate pointer to
2904 * the static data because we can't rely on being able to resolve the GC
2905 * handle in the reference queue callback.
2907 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2908 data->gc_handle = GPOINTER_TO_UINT (gch);
2911 context_adjust_static_data (ctx);
2912 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2914 mono_threads_unlock ();
2916 MONO_PROFILER_RAISE (context_loaded, (ctx));
2920 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContextHandle ctx, MonoError *error)
2923 mono_threads_register_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_register_app_context */
2927 mono_threads_release_app_context (MonoAppContext* ctx, MonoError *error)
2930 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2931 * cleanup in exceptional circumstances, we don't actually do any
2932 * cleanup work here. We instead do this via a reference queue.
2935 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2937 MONO_PROFILER_RAISE (context_unloaded, (ctx));
2941 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContextHandle ctx, MonoError *error)
2944 mono_threads_release_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_release_app_context */
2947 void mono_thread_init (MonoThreadStartCB start_cb,
2948 MonoThreadAttachCB attach_cb)
2950 mono_coop_mutex_init_recursive (&threads_mutex);
2952 mono_os_mutex_init_recursive(&interlocked_mutex);
2953 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2955 mono_os_event_init (&background_change_event, FALSE);
2957 mono_init_static_data_info (&thread_static_info);
2958 mono_init_static_data_info (&context_static_info);
2960 mono_thread_start_cb = start_cb;
2961 mono_thread_attach_cb = attach_cb;
2965 thread_attach (MonoThreadInfo *info)
2967 return mono_gc_thread_attach (info);
2971 thread_detach (MonoThreadInfo *info)
2973 MonoInternalThread *internal;
2976 /* If a delegate is passed to native code and invoked on a thread we dont
2977 * know about, marshal will register it with mono_threads_attach_coop, but
2978 * we have no way of knowing when that thread goes away. SGen has a TSD
2979 * so we assume that if the domain is still registered, we can detach
2984 if (!mono_thread_info_try_get_internal_thread_gchandle (info, &gchandle))
2987 internal = (MonoInternalThread*) mono_gchandle_get_target (gchandle);
2988 g_assert (internal);
2990 mono_gchandle_free (gchandle);
2992 mono_thread_detach_internal (internal);
2996 thread_detach_with_lock (MonoThreadInfo *info)
2998 return mono_gc_thread_detach_with_lock (info);
3002 thread_in_critical_region (MonoThreadInfo *info)
3004 return mono_gc_thread_in_critical_region (info);
3008 ip_in_critical_region (MonoDomain *domain, gpointer ip)
3014 * We pass false for 'try_aot' so this becomes async safe.
3015 * It won't find aot methods whose jit info is not yet loaded,
3016 * so we preload their jit info in the JIT.
3018 ji = mono_jit_info_table_find_internal (domain, ip, FALSE, FALSE);
3022 method = mono_jit_info_get_method (ji);
3025 return mono_gc_is_critical_method (method);
3029 mono_thread_callbacks_init (void)
3031 MonoThreadInfoCallbacks cb;
3033 memset (&cb, 0, sizeof(cb));
3034 cb.thread_attach = thread_attach;
3035 cb.thread_detach = thread_detach;
3036 cb.thread_detach_with_lock = thread_detach_with_lock;
3037 cb.ip_in_critical_region = ip_in_critical_region;
3038 cb.thread_in_critical_region = thread_in_critical_region;
3039 mono_thread_info_callbacks_init (&cb);
3043 * mono_thread_cleanup:
3046 mono_thread_cleanup (void)
3048 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3049 /* The main thread must abandon any held mutexes (particularly
3050 * important for named mutexes as they are shared across
3051 * processes, see bug 74680.) This will happen when the
3052 * thread exits, but if it's not running in a subthread it
3053 * won't exit in time.
3055 mono_w32mutex_abandon ();
3059 /* This stuff needs more testing, it seems one of these
3060 * critical sections can be locked when mono_thread_cleanup is
3063 mono_coop_mutex_destroy (&threads_mutex);
3064 mono_os_mutex_destroy (&interlocked_mutex);
3065 mono_os_mutex_destroy (&delayed_free_table_mutex);
3066 mono_os_mutex_destroy (&small_id_mutex);
3067 mono_os_event_destroy (&background_change_event);
3072 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3074 mono_thread_cleanup_fn = func;
3078 * mono_thread_set_manage_callback:
3081 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3083 thread->internal_thread->manage_callback = func;
3087 static void print_tids (gpointer key, gpointer value, gpointer user)
3089 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3090 * sizeof(uint) and a cast to uint would overflow
3092 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3093 * print this as a pointer.
3095 g_message ("Waiting for: %p", key);
3100 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3101 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3106 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3109 MonoThreadInfoWaitRet ret;
3111 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3113 /* Add the thread state change event, so it wakes
3114 * up if a thread changes to background mode. */
3117 if (check_state_change)
3118 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3120 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3123 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3124 /* See the comment in build_wait_tids() */
3125 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3129 for( i = 0; i < wait->num; i++)
3130 mono_threads_close_thread_handle (wait->handles [i]);
3132 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3135 if (ret < wait->num) {
3136 MonoInternalThread *internal;
3138 internal = wait->threads [ret];
3140 mono_threads_lock ();
3141 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3142 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3143 mono_threads_unlock ();
3147 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3149 struct wait_data *wait=(struct wait_data *)user;
3151 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3152 MonoInternalThread *thread=(MonoInternalThread *)value;
3154 /* Ignore background threads, we abort them later */
3155 /* Do not lock here since it is not needed and the caller holds threads_lock */
3156 if (thread->state & ThreadState_Background) {
3157 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3158 return; /* just leave, ignore */
3161 if (mono_gc_is_finalizer_internal_thread (thread)) {
3162 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3166 if (thread == mono_thread_internal_current ()) {
3167 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3171 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3172 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3176 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3177 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3181 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3182 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3183 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3184 wait->threads[wait->num]=thread;
3187 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3189 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3194 /* Just ignore the rest, we can't do anything with
3201 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3203 struct wait_data *wait=(struct wait_data *)user;
3204 MonoNativeThreadId self = mono_native_thread_id_get ();
3205 MonoInternalThread *thread = (MonoInternalThread *)value;
3207 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3210 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3212 if (mono_gc_is_finalizer_internal_thread (thread))
3215 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3216 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3217 wait->threads[wait->num] = thread;
3220 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3221 mono_thread_internal_abort (thread);
3228 * mono_threads_set_shutting_down:
3230 * Is called by a thread that wants to shut down Mono. If the runtime is already
3231 * shutting down, the calling thread is suspended/stopped, and this function never
3235 mono_threads_set_shutting_down (void)
3237 MonoInternalThread *current_thread = mono_thread_internal_current ();
3239 mono_threads_lock ();
3241 if (shutting_down) {
3242 mono_threads_unlock ();
3244 /* Make sure we're properly suspended/stopped */
3246 LOCK_THREAD (current_thread);
3248 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3249 UNLOCK_THREAD (current_thread);
3250 mono_thread_execute_interruption ();
3252 UNLOCK_THREAD (current_thread);
3255 /*since we're killing the thread, detach it.*/
3256 mono_thread_detach_internal (current_thread);
3258 /* Wake up other threads potentially waiting for us */
3259 mono_thread_info_exit (0);
3261 shutting_down = TRUE;
3263 /* Not really a background state change, but this will
3264 * interrupt the main thread if it is waiting for all
3265 * the other threads.
3267 mono_os_event_set (&background_change_event);
3269 mono_threads_unlock ();
3274 * mono_thread_manage:
3277 mono_thread_manage (void)
3279 struct wait_data wait_data;
3280 struct wait_data *wait = &wait_data;
3282 memset (wait, 0, sizeof (struct wait_data));
3283 /* join each thread that's still running */
3284 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3286 mono_threads_lock ();
3288 THREAD_DEBUG (g_message("%s: No threads", __func__));
3289 mono_threads_unlock ();
3292 mono_threads_unlock ();
3295 mono_threads_lock ();
3296 if (shutting_down) {
3297 /* somebody else is shutting down */
3298 mono_threads_unlock ();
3301 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3302 mono_g_hash_table_foreach (threads, print_tids, NULL));
3304 mono_os_event_reset (&background_change_event);
3306 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3307 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3308 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3309 mono_threads_unlock ();
3311 /* Something to wait for */
3312 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3313 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3314 } while(wait->num>0);
3316 /* Mono is shutting down, so just wait for the end */
3317 if (!mono_runtime_try_shutdown ()) {
3318 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3319 mono_thread_suspend (mono_thread_internal_current ());
3320 mono_thread_execute_interruption ();
3324 * Remove everything but the finalizer thread and self.
3325 * Also abort all the background threads
3328 mono_threads_lock ();
3331 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3332 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3333 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3335 mono_threads_unlock ();
3337 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3338 if (wait->num > 0) {
3339 /* Something to wait for */
3340 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3342 } while (wait->num > 0);
3345 * give the subthreads a chance to really quit (this is mainly needed
3346 * to get correct user and system times from getrusage/wait/time(1)).
3347 * This could be removed if we avoid pthread_detach() and use pthread_join().
3349 mono_thread_info_yield ();
3353 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3355 MonoInternalThread *thread = (MonoInternalThread*)value;
3356 struct wait_data *wait = (struct wait_data*)user_data;
3359 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3361 * This needs no locking.
3363 if ((thread->state & ThreadState_Suspended) != 0 ||
3364 (thread->state & ThreadState_Stopped) != 0)
3367 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3368 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3369 wait->threads [wait->num] = thread;
3375 * mono_thread_suspend_all_other_threads:
3377 * Suspend all managed threads except the finalizer thread and this thread. It is
3378 * not possible to resume them later.
3380 void mono_thread_suspend_all_other_threads (void)
3382 struct wait_data wait_data;
3383 struct wait_data *wait = &wait_data;
3385 MonoNativeThreadId self = mono_native_thread_id_get ();
3386 guint32 eventidx = 0;
3387 gboolean starting, finished;
3389 memset (wait, 0, sizeof (struct wait_data));
3391 * The other threads could be in an arbitrary state at this point, i.e.
3392 * they could be starting up, shutting down etc. This means that there could be
3393 * threads which are not even in the threads hash table yet.
3397 * First we set a barrier which will be checked by all threads before they
3398 * are added to the threads hash table, and they will exit if the flag is set.
3399 * This ensures that no threads could be added to the hash later.
3400 * We will use shutting_down as the barrier for now.
3402 g_assert (shutting_down);
3405 * We make multiple calls to WaitForMultipleObjects since:
3406 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3407 * - some threads could exit without becoming suspended
3412 * Make a copy of the hashtable since we can't do anything with
3413 * threads while threads_mutex is held.
3416 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3417 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3418 mono_threads_lock ();
3419 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3420 mono_threads_unlock ();
3423 /* Get the suspended events that we'll be waiting for */
3424 for (i = 0; i < wait->num; ++i) {
3425 MonoInternalThread *thread = wait->threads [i];
3427 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3428 || mono_gc_is_finalizer_internal_thread (thread)
3429 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3431 mono_threads_close_thread_handle (wait->handles [i]);
3432 wait->threads [i] = NULL;
3436 LOCK_THREAD (thread);
3438 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3439 UNLOCK_THREAD (thread);
3440 mono_threads_close_thread_handle (wait->handles [i]);
3441 wait->threads [i] = NULL;
3447 /* Convert abort requests into suspend requests */
3448 if ((thread->state & ThreadState_AbortRequested) != 0)
3449 thread->state &= ~ThreadState_AbortRequested;
3451 thread->state |= ThreadState_SuspendRequested;
3452 mono_os_event_reset (thread->suspended);
3454 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3455 async_suspend_internal (thread, TRUE);
3457 mono_threads_close_thread_handle (wait->handles [i]);
3458 wait->threads [i] = NULL;
3460 if (eventidx <= 0) {
3462 * If there are threads which are starting up, we wait until they
3463 * are suspended when they try to register in the threads hash.
3464 * This is guaranteed to finish, since the threads which can create new
3465 * threads get suspended after a while.
3466 * FIXME: The finalizer thread can still create new threads.
3468 mono_threads_lock ();
3469 if (threads_starting_up)
3470 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3473 mono_threads_unlock ();
3475 mono_thread_info_sleep (100, NULL);
3483 MonoInternalThread *thread;
3484 MonoStackFrameInfo *frames;
3485 int nframes, max_frames;
3486 int nthreads, max_threads;
3487 MonoInternalThread **threads;
3488 } ThreadDumpUserData;
3490 static gboolean thread_dump_requested;
3492 /* This needs to be async safe */
3494 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3496 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3498 if (ud->nframes < ud->max_frames) {
3499 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3506 /* This needs to be async safe */
3507 static SuspendThreadResult
3508 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3510 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3511 MonoInternalThread *thread = user_data->thread;
3514 /* This no longer works with remote unwinding */
3515 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3516 mono_thread_internal_describe (thread, text);
3517 g_string_append (text, "\n");
3520 if (thread == mono_thread_internal_current ())
3521 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3523 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3525 return MonoResumeThread;
3529 int nthreads, max_threads;
3530 MonoInternalThread **threads;
3531 } CollectThreadsUserData;
3534 collect_thread (gpointer key, gpointer value, gpointer user)
3536 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3537 MonoInternalThread *thread = (MonoInternalThread *)value;
3539 if (ud->nthreads < ud->max_threads)
3540 ud->threads [ud->nthreads ++] = thread;
3544 * Collect running threads into the THREADS array.
3545 * THREADS should be an array allocated on the stack.
3548 collect_threads (MonoInternalThread **thread_array, int max_threads)
3550 CollectThreadsUserData ud;
3552 memset (&ud, 0, sizeof (ud));
3553 /* This array contains refs, but its on the stack, so its ok */
3554 ud.threads = thread_array;
3555 ud.max_threads = max_threads;
3557 mono_threads_lock ();
3558 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3559 mono_threads_unlock ();
3565 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3567 GString* text = g_string_new (0);
3569 GError *error = NULL;
3572 ud->thread = thread;
3575 /* Collect frames for the thread */
3576 if (thread == mono_thread_internal_current ()) {
3577 get_thread_dump (mono_thread_info_current (), ud);
3579 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3583 * Do all the non async-safe work outside of get_thread_dump.
3586 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3588 g_string_append_printf (text, "\n\"%s\"", name);
3591 else if (thread->threadpool_thread) {
3592 g_string_append (text, "\n\"<threadpool thread>\"");
3594 g_string_append (text, "\n\"<unnamed thread>\"");
3597 for (i = 0; i < ud->nframes; ++i) {
3598 MonoStackFrameInfo *frame = &ud->frames [i];
3599 MonoMethod *method = NULL;
3601 if (frame->type == FRAME_TYPE_MANAGED)
3602 method = mono_jit_info_get_method (frame->ji);
3605 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3606 g_string_append_printf (text, " %s\n", location);
3609 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3613 fprintf (stdout, "%s", text->str);
3615 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3616 OutputDebugStringA(text->str);
3619 g_string_free (text, TRUE);
3624 mono_threads_perform_thread_dump (void)
3626 ThreadDumpUserData ud;
3627 MonoInternalThread *thread_array [128];
3628 int tindex, nthreads;
3630 if (!thread_dump_requested)
3633 printf ("Full thread dump:\n");
3635 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3636 nthreads = collect_threads (thread_array, 128);
3638 memset (&ud, 0, sizeof (ud));
3639 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3640 ud.max_frames = 256;
3642 for (tindex = 0; tindex < nthreads; ++tindex)
3643 dump_thread (thread_array [tindex], &ud);
3647 thread_dump_requested = FALSE;
3650 /* Obtain the thread dump of all threads */
3652 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3655 ThreadDumpUserData ud;
3656 MonoInternalThread *thread_array [128];
3657 MonoDomain *domain = mono_domain_get ();
3658 MonoDebugSourceLocation *location;
3659 int tindex, nthreads;
3663 *out_threads = NULL;
3664 *out_stack_frames = NULL;
3666 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3667 nthreads = collect_threads (thread_array, 128);
3669 memset (&ud, 0, sizeof (ud));
3670 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3671 ud.max_frames = 256;
3673 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3676 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3680 for (tindex = 0; tindex < nthreads; ++tindex) {
3681 MonoInternalThread *thread = thread_array [tindex];
3682 MonoArray *thread_frames;
3688 /* Collect frames for the thread */
3689 if (thread == mono_thread_internal_current ()) {
3690 get_thread_dump (mono_thread_info_current (), &ud);
3692 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3695 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3697 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3700 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3702 for (i = 0; i < ud.nframes; ++i) {
3703 MonoStackFrameInfo *frame = &ud.frames [i];
3704 MonoMethod *method = NULL;
3705 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3709 sf->native_offset = frame->native_offset;
3711 if (frame->type == FRAME_TYPE_MANAGED)
3712 method = mono_jit_info_get_method (frame->ji);
3715 sf->method_address = (gsize) frame->ji->code_start;
3717 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3720 MONO_OBJECT_SETREF (sf, method, rm);
3722 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3724 sf->il_offset = location->il_offset;
3726 if (location && location->source_file) {
3727 MonoString *filename = mono_string_new_checked (domain, location->source_file, error);
3730 MONO_OBJECT_SETREF (sf, filename, filename);
3731 sf->line = location->row;
3732 sf->column = location->column;
3734 mono_debug_free_source_location (location);
3739 mono_array_setref (thread_frames, i, sf);
3745 return is_ok (error);
3749 * mono_threads_request_thread_dump:
3751 * Ask all threads except the current to print their stacktrace to stdout.
3754 mono_threads_request_thread_dump (void)
3756 /*The new thread dump code runs out of the finalizer thread. */
3757 thread_dump_requested = TRUE;
3758 mono_gc_finalize_notify ();
3763 gint allocated; /* +1 so that refs [allocated] == NULL */
3767 typedef struct ref_stack RefStack;
3770 ref_stack_new (gint initial_size)
3774 initial_size = MAX (initial_size, 16) + 1;
3775 rs = g_new0 (RefStack, 1);
3776 rs->refs = g_new0 (gpointer, initial_size);
3777 rs->allocated = initial_size;
3782 ref_stack_destroy (gpointer ptr)
3784 RefStack *rs = (RefStack *)ptr;
3793 ref_stack_push (RefStack *rs, gpointer ptr)
3795 g_assert (rs != NULL);
3797 if (rs->bottom >= rs->allocated) {
3798 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3799 rs->allocated <<= 1;
3800 rs->refs [rs->allocated] = NULL;
3802 rs->refs [rs->bottom++] = ptr;
3806 ref_stack_pop (RefStack *rs)
3808 if (rs == NULL || rs->bottom == 0)
3812 rs->refs [rs->bottom] = NULL;
3816 ref_stack_find (RefStack *rs, gpointer ptr)
3823 for (refs = rs->refs; refs && *refs; refs++) {
3831 * mono_thread_push_appdomain_ref:
3833 * Register that the current thread may have references to objects in domain
3834 * @domain on its stack. Each call to this function should be paired with a
3835 * call to pop_appdomain_ref.
3838 mono_thread_push_appdomain_ref (MonoDomain *domain)
3840 MonoInternalThread *thread = mono_thread_internal_current ();
3843 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3844 SPIN_LOCK (thread->lock_thread_id);
3845 if (thread->appdomain_refs == NULL)
3846 thread->appdomain_refs = ref_stack_new (16);
3847 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3848 SPIN_UNLOCK (thread->lock_thread_id);
3853 mono_thread_pop_appdomain_ref (void)
3855 MonoInternalThread *thread = mono_thread_internal_current ();
3858 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3859 SPIN_LOCK (thread->lock_thread_id);
3860 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3861 SPIN_UNLOCK (thread->lock_thread_id);
3866 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3869 SPIN_LOCK (thread->lock_thread_id);
3870 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3871 SPIN_UNLOCK (thread->lock_thread_id);
3876 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3878 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3881 typedef struct abort_appdomain_data {
3882 struct wait_data wait;
3884 } abort_appdomain_data;
3887 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3889 MonoInternalThread *thread = (MonoInternalThread*)value;
3890 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3891 MonoDomain *domain = data->domain;
3893 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3894 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3896 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3897 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3898 data->wait.threads [data->wait.num] = thread;
3901 /* Just ignore the rest, we can't do anything with
3909 * mono_threads_abort_appdomain_threads:
3911 * Abort threads which has references to the given appdomain.
3914 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3916 abort_appdomain_data user_data;
3918 int orig_timeout = timeout;
3921 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3923 start_time = mono_msec_ticks ();
3925 mono_threads_lock ();
3927 user_data.domain = domain;
3928 user_data.wait.num = 0;
3929 /* This shouldn't take any locks */
3930 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3931 mono_threads_unlock ();
3933 if (user_data.wait.num > 0) {
3934 /* Abort the threads outside the threads lock */
3935 for (i = 0; i < user_data.wait.num; ++i)
3936 mono_thread_internal_abort (user_data.wait.threads [i]);
3939 * We should wait for the threads either to abort, or to leave the
3940 * domain. We can't do the latter, so we wait with a timeout.
3942 wait_for_tids (&user_data.wait, 100, FALSE);
3945 /* Update remaining time */
3946 timeout -= mono_msec_ticks () - start_time;
3947 start_time = mono_msec_ticks ();
3949 if (orig_timeout != -1 && timeout < 0)
3952 while (user_data.wait.num > 0);
3954 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3960 mono_thread_self_abort (void)
3963 self_abort_internal (&error);
3964 mono_error_set_pending_exception (&error);
3968 * mono_thread_get_undeniable_exception:
3970 * Return an exception which needs to be raised when leaving a catch clause.
3971 * This is used for undeniable exception propagation.
3974 mono_thread_get_undeniable_exception (void)
3976 MonoInternalThread *thread = mono_thread_internal_current ();
3978 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3981 // We don't want to have our exception effect calls made by
3982 // the catching block
3984 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3988 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3989 * exception if the thread no longer references a dying appdomain.
3991 thread->abort_exc->trace_ips = NULL;
3992 thread->abort_exc->stack_trace = NULL;
3993 return thread->abort_exc;
3996 #if MONO_SMALL_CONFIG
3997 #define NUM_STATIC_DATA_IDX 4
3998 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4002 #define NUM_STATIC_DATA_IDX 8
4003 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4004 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
4008 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
4009 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
4012 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
4014 gpointer *static_data = (gpointer *)addr;
4016 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
4017 void **ptr = (void **)static_data [i];
4022 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4023 void **p = ptr + idx;
4026 mark_func ((MonoObject**)p, gc_data);
4032 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4034 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4038 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4040 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4044 * mono_alloc_static_data
4046 * Allocate memory blocks for storing threads or context static data
4049 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4051 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4054 gpointer* static_data = *static_data_ptr;
4056 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4057 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4059 if (mono_gc_user_markers_supported ()) {
4060 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4061 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4063 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4064 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4067 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4068 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4069 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4070 *static_data_ptr = static_data;
4071 static_data [0] = static_data;
4074 for (i = 1; i <= idx; ++i) {
4075 if (static_data [i])
4078 if (mono_gc_user_markers_supported ())
4079 static_data [i] = g_malloc0 (static_data_size [i]);
4081 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4082 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4083 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4088 mono_free_static_data (gpointer* static_data)
4091 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4092 gpointer p = static_data [i];
4096 * At this point, the static data pointer array is still registered with the
4097 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4098 * data. Freeing the individual arrays without first nulling their slots
4099 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4100 * such an already freed array. See bug #13813.
4102 static_data [i] = NULL;
4103 mono_memory_write_barrier ();
4104 if (mono_gc_user_markers_supported ())
4107 mono_gc_free_fixed (p);
4109 mono_gc_free_fixed (static_data);
4113 * mono_init_static_data_info
4115 * Initializes static data counters
4117 static void mono_init_static_data_info (StaticDataInfo *static_data)
4119 static_data->idx = 0;
4120 static_data->offset = 0;
4121 static_data->freelist = NULL;
4125 * mono_alloc_static_data_slot
4127 * Generates an offset for static data. static_data contains the counters
4128 * used to generate it.
4131 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4133 if (!static_data->idx && !static_data->offset) {
4135 * we use the first chunk of the first allocation also as
4136 * an array for the rest of the data
4138 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4140 static_data->offset += align - 1;
4141 static_data->offset &= ~(align - 1);
4142 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4143 static_data->idx ++;
4144 g_assert (size <= static_data_size [static_data->idx]);
4145 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4146 static_data->offset = 0;
4148 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4149 static_data->offset += size;
4154 * LOCKING: requires that threads_mutex is held
4157 context_adjust_static_data (MonoAppContext *ctx)
4159 if (context_static_info.offset || context_static_info.idx > 0) {
4160 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4161 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4162 ctx->data->static_data = ctx->static_data;
4167 * LOCKING: requires that threads_mutex is held
4170 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4172 MonoInternalThread *thread = (MonoInternalThread *)value;
4173 guint32 offset = GPOINTER_TO_UINT (user);
4175 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4179 * LOCKING: requires that threads_mutex is held
4182 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4184 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4189 guint32 offset = GPOINTER_TO_UINT (user);
4190 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4191 ctx->data->static_data = ctx->static_data;
4194 static StaticDataFreeList*
4195 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4197 StaticDataFreeList* prev = NULL;
4198 StaticDataFreeList* tmp = static_data->freelist;
4200 if (tmp->size == size) {
4202 prev->next = tmp->next;
4204 static_data->freelist = tmp->next;
4213 #if SIZEOF_VOID_P == 4
4220 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4222 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4224 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4225 MonoBitSet *rb = sets [idx];
4226 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4227 offset /= sizeof (uintptr_t);
4228 /* offset is now the bitmap offset */
4229 for (int i = 0; i < numbits; ++i) {
4230 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4231 mono_bitset_set_fast (rb, offset + i);
4236 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4238 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4239 MonoBitSet *rb = sets [idx];
4240 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4241 offset /= sizeof (uintptr_t);
4242 /* offset is now the bitmap offset */
4243 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4244 mono_bitset_clear_fast (rb, offset + i);
4248 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4250 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4252 StaticDataInfo *info;
4255 if (static_type == SPECIAL_STATIC_THREAD) {
4256 info = &thread_static_info;
4257 sets = thread_reference_bitmaps;
4259 info = &context_static_info;
4260 sets = context_reference_bitmaps;
4263 mono_threads_lock ();
4265 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4269 offset = item->offset;
4272 offset = mono_alloc_static_data_slot (info, size, align);
4275 update_reference_bitmap (sets, offset, bitmap, numbits);
4277 if (static_type == SPECIAL_STATIC_THREAD) {
4278 /* This can be called during startup */
4279 if (threads != NULL)
4280 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4282 if (contexts != NULL)
4283 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4285 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4288 mono_threads_unlock ();
4294 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4296 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4298 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4299 return get_thread_static_data (thread, offset);
4301 return get_context_static_data (thread->current_appcontext, offset);
4306 mono_get_special_static_data (guint32 offset)
4308 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4317 * LOCKING: requires that threads_mutex is held
4320 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4322 MonoInternalThread *thread = (MonoInternalThread *)value;
4323 OffsetSize *data = (OffsetSize *)user;
4324 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4325 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4328 if (!thread->static_data || !thread->static_data [idx])
4330 ptr = ((char*) thread->static_data [idx]) + off;
4331 mono_gc_bzero_atomic (ptr, data->size);
4335 * LOCKING: requires that threads_mutex is held
4338 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4340 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4345 OffsetSize *data = (OffsetSize *)user;
4346 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4347 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4350 if (!ctx->static_data || !ctx->static_data [idx])
4353 ptr = ((char*) ctx->static_data [idx]) + off;
4354 mono_gc_bzero_atomic (ptr, data->size);
4358 do_free_special_slot (guint32 offset, guint32 size)
4360 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4362 StaticDataInfo *info;
4364 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4365 info = &thread_static_info;
4366 sets = thread_reference_bitmaps;
4368 info = &context_static_info;
4369 sets = context_reference_bitmaps;
4372 guint32 data_offset = offset;
4373 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4374 OffsetSize data = { data_offset, size };
4376 clear_reference_bitmap (sets, data.offset, data.size);
4378 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4379 if (threads != NULL)
4380 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4382 if (contexts != NULL)
4383 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4386 if (!mono_runtime_is_shutting_down ()) {
4387 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4389 item->offset = offset;
4392 item->next = info->freelist;
4393 info->freelist = item;
4398 do_free_special (gpointer key, gpointer value, gpointer data)
4400 MonoClassField *field = (MonoClassField *)key;
4401 guint32 offset = GPOINTER_TO_UINT (value);
4404 size = mono_type_size (field->type, &align);
4405 do_free_special_slot (offset, size);
4409 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4411 mono_threads_lock ();
4413 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4415 mono_threads_unlock ();
4419 static void CALLBACK dummy_apc (ULONG_PTR param)
4425 * mono_thread_execute_interruption
4427 * Performs the operation that the requested thread state requires (abort,
4430 static MonoException*
4431 mono_thread_execute_interruption (void)
4433 MonoInternalThread *thread = mono_thread_internal_current ();
4434 MonoThread *sys_thread = mono_thread_current ();
4436 LOCK_THREAD (thread);
4438 /* MonoThread::interruption_requested can only be changed with atomics */
4439 if (!mono_thread_clear_interruption_requested (thread)) {
4440 UNLOCK_THREAD (thread);
4444 /* this will consume pending APC calls */
4446 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4448 /* Clear the interrupted flag of the thread so it can wait again */
4449 mono_thread_info_clear_self_interrupt ();
4451 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4452 if (sys_thread->pending_exception) {
4455 exc = sys_thread->pending_exception;
4456 sys_thread->pending_exception = NULL;
4458 UNLOCK_THREAD (thread);
4460 } else if (thread->state & (ThreadState_AbortRequested)) {
4461 UNLOCK_THREAD (thread);
4462 g_assert (sys_thread->pending_exception == NULL);
4463 if (thread->abort_exc == NULL) {
4465 * This might be racy, but it has to be called outside the lock
4466 * since it calls managed code.
4468 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4470 return thread->abort_exc;
4471 } else if (thread->state & (ThreadState_SuspendRequested)) {
4472 /* calls UNLOCK_THREAD (thread) */
4473 self_suspend_internal ();
4475 } else if (thread->thread_interrupt_requested) {
4477 thread->thread_interrupt_requested = FALSE;
4478 UNLOCK_THREAD (thread);
4480 return(mono_get_exception_thread_interrupted ());
4483 UNLOCK_THREAD (thread);
4489 * mono_thread_request_interruption
4491 * A signal handler can call this method to request the interruption of a
4492 * thread. The result of the interruption will depend on the current state of
4493 * the thread. If the result is an exception that needs to be throw, it is
4494 * provided as return value.
4497 mono_thread_request_interruption (gboolean running_managed)
4499 MonoInternalThread *thread = mono_thread_internal_current ();
4501 /* The thread may already be stopping */
4505 if (!mono_thread_set_interruption_requested (thread))
4508 if (!running_managed || is_running_protected_wrapper ()) {
4509 /* Can't stop while in unmanaged code. Increase the global interruption
4510 request count. When exiting the unmanaged method the count will be
4511 checked and the thread will be interrupted. */
4513 /* this will awake the thread if it is in WaitForSingleObject
4515 /* Our implementation of this function ignores the func argument */
4517 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4519 mono_thread_info_self_interrupt ();
4524 return mono_thread_execute_interruption ();
4528 /*This function should be called by a thread after it has exited all of
4529 * its handle blocks at interruption time.*/
4531 mono_thread_resume_interruption (gboolean exec)
4533 MonoInternalThread *thread = mono_thread_internal_current ();
4534 gboolean still_aborting;
4536 /* The thread may already be stopping */
4540 LOCK_THREAD (thread);
4541 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4542 UNLOCK_THREAD (thread);
4544 /*This can happen if the protected block called Thread::ResetAbort*/
4545 if (!still_aborting)
4548 if (!mono_thread_set_interruption_requested (thread))
4551 mono_thread_info_self_interrupt ();
4554 return mono_thread_execute_interruption ();
4559 gboolean mono_thread_interruption_requested ()
4561 if (thread_interruption_requested) {
4562 MonoInternalThread *thread = mono_thread_internal_current ();
4563 /* The thread may already be stopping */
4565 return mono_thread_get_interruption_requested (thread);
4570 static MonoException*
4571 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4573 MonoInternalThread *thread = mono_thread_internal_current ();
4575 /* The thread may already be stopping */
4578 if (!mono_thread_get_interruption_requested (thread))
4580 if (!bypass_abort_protection && is_running_protected_wrapper ())
4583 return mono_thread_execute_interruption ();
4587 * Performs the interruption of the current thread, if one has been requested,
4588 * and the thread is not running a protected wrapper.
4589 * Return the exception which needs to be thrown, if any.
4592 mono_thread_interruption_checkpoint (void)
4594 return mono_thread_interruption_checkpoint_request (FALSE);
4598 * Performs the interruption of the current thread, if one has been requested.
4599 * Return the exception which needs to be thrown, if any.
4602 mono_thread_force_interruption_checkpoint_noraise (void)
4604 return mono_thread_interruption_checkpoint_request (TRUE);
4608 * mono_set_pending_exception:
4610 * Set the pending exception of the current thread to EXC.
4611 * The exception will be thrown when execution returns to managed code.
4614 mono_set_pending_exception (MonoException *exc)
4616 MonoThread *thread = mono_thread_current ();
4618 /* The thread may already be stopping */
4622 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4624 mono_thread_request_interruption (FALSE);
4628 * mono_thread_interruption_request_flag:
4630 * Returns the address of a flag that will be non-zero if an interruption has
4631 * been requested for a thread. The thread to interrupt may not be the current
4632 * thread, so an additional call to mono_thread_interruption_requested() or
4633 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4636 gint32* mono_thread_interruption_request_flag ()
4638 return &thread_interruption_requested;
4642 mono_thread_init_apartment_state (void)
4645 MonoInternalThread* thread = mono_thread_internal_current ();
4647 /* Positive return value indicates success, either
4648 * S_OK if this is first CoInitialize call, or
4649 * S_FALSE if CoInitialize already called, but with same
4650 * threading model. A negative value indicates failure,
4651 * probably due to trying to change the threading model.
4653 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4654 ? COINIT_APARTMENTTHREADED
4655 : COINIT_MULTITHREADED) < 0) {
4656 thread->apartment_state = ThreadApartmentState_Unknown;
4662 mono_thread_cleanup_apartment_state (void)
4665 MonoInternalThread* thread = mono_thread_internal_current ();
4667 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4674 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4676 LOCK_THREAD (thread);
4677 thread->state |= state;
4678 UNLOCK_THREAD (thread);
4682 * mono_thread_test_and_set_state:
4683 * Test if current state of \p thread include \p test. If it does not, OR \p set into the state.
4684 * \returns TRUE if \p set was OR'd in.
4687 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4689 LOCK_THREAD (thread);
4691 if ((thread->state & test) != 0) {
4692 UNLOCK_THREAD (thread);
4696 thread->state |= set;
4697 UNLOCK_THREAD (thread);
4703 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4705 LOCK_THREAD (thread);
4706 thread->state &= ~state;
4707 UNLOCK_THREAD (thread);
4711 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4713 gboolean ret = FALSE;
4715 LOCK_THREAD (thread);
4717 if ((thread->state & test) != 0) {
4721 UNLOCK_THREAD (thread);
4727 self_interrupt_thread (void *_unused)
4730 MonoThreadInfo *info;
4732 exc = mono_thread_execute_interruption ();
4734 if (mono_threads_is_coop_enabled ()) {
4735 /* We can return from an async call in coop, as
4736 * it's simply called when exiting the safepoint */
4740 g_error ("%s: we can't resume from an async call", __func__);
4743 info = mono_thread_info_current ();
4745 /* We must use _with_context since we didn't trampoline into the runtime */
4746 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. */
4750 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4754 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4758 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4760 MonoJitInfo **dest = (MonoJitInfo **)data;
4766 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4768 MonoJitInfo *ji = NULL;
4773 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4774 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4775 * where we hold runtime locks.
4777 if (!mono_threads_is_coop_enabled ())
4778 mono_thread_info_set_is_async_context (TRUE);
4779 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4780 if (!mono_threads_is_coop_enabled ())
4781 mono_thread_info_set_is_async_context (FALSE);
4786 MonoInternalThread *thread;
4787 gboolean install_async_abort;
4788 MonoThreadInfoInterruptToken *interrupt_token;
4791 static SuspendThreadResult
4792 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4794 AbortThreadData *data = (AbortThreadData *)ud;
4795 MonoInternalThread *thread = data->thread;
4796 MonoJitInfo *ji = NULL;
4797 gboolean protected_wrapper;
4798 gboolean running_managed;
4800 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4801 return MonoResumeThread;
4803 /*someone is already interrupting it*/
4804 if (!mono_thread_set_interruption_requested (thread))
4805 return MonoResumeThread;
4807 ji = mono_thread_info_get_last_managed (info);
4808 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4809 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4811 if (!protected_wrapper && running_managed) {
4812 /*We are in managed code*/
4813 /*Set the thread to call */
4814 if (data->install_async_abort)
4815 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4816 return MonoResumeThread;
4819 * This will cause waits to be broken.
4820 * It will also prevent the thread from entering a wait, so if the thread returns
4821 * from the wait before it receives the abort signal, it will just spin in the wait
4822 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4825 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4827 return MonoResumeThread;
4832 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4834 AbortThreadData data;
4836 g_assert (thread != mono_thread_internal_current ());
4838 data.thread = thread;
4839 data.install_async_abort = install_async_abort;
4840 data.interrupt_token = NULL;
4842 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4843 if (data.interrupt_token)
4844 mono_thread_info_finish_interrupt (data.interrupt_token);
4845 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4849 self_abort_internal (MonoError *error)
4855 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4856 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4859 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.
4861 exc = mono_thread_request_interruption (TRUE);
4863 mono_error_set_exception_instance (error, exc);
4865 mono_thread_info_self_interrupt ();
4869 MonoInternalThread *thread;
4871 MonoThreadInfoInterruptToken *interrupt_token;
4872 } SuspendThreadData;
4874 static SuspendThreadResult
4875 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4877 SuspendThreadData *data = (SuspendThreadData *)ud;
4878 MonoInternalThread *thread = data->thread;
4879 MonoJitInfo *ji = NULL;
4880 gboolean protected_wrapper;
4881 gboolean running_managed;
4883 ji = mono_thread_info_get_last_managed (info);
4884 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4885 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4887 if (running_managed && !protected_wrapper) {
4888 if (mono_threads_is_coop_enabled ()) {
4889 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4890 return MonoResumeThread;
4892 thread->state &= ~ThreadState_SuspendRequested;
4893 thread->state |= ThreadState_Suspended;
4894 return KeepSuspended;
4897 mono_thread_set_interruption_requested (thread);
4898 if (data->interrupt)
4899 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4901 return MonoResumeThread;
4905 /* LOCKING: called with @thread synch_cs held, and releases it */
4907 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4909 SuspendThreadData data;
4911 g_assert (thread != mono_thread_internal_current ());
4913 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4915 thread->self_suspended = FALSE;
4917 data.thread = thread;
4918 data.interrupt = interrupt;
4919 data.interrupt_token = NULL;
4921 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4922 if (data.interrupt_token)
4923 mono_thread_info_finish_interrupt (data.interrupt_token);
4925 UNLOCK_THREAD (thread);
4928 /* LOCKING: called with @thread synch_cs held, and releases it */
4930 self_suspend_internal (void)
4932 MonoInternalThread *thread;
4934 MonoOSEventWaitRet res;
4936 thread = mono_thread_internal_current ();
4938 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4940 thread->self_suspended = TRUE;
4942 thread->state &= ~ThreadState_SuspendRequested;
4943 thread->state |= ThreadState_Suspended;
4945 UNLOCK_THREAD (thread);
4947 event = thread->suspended;
4950 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4951 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4956 suspend_for_shutdown_async_call (gpointer unused)
4959 mono_thread_info_yield ();
4962 static SuspendThreadResult
4963 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4965 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4966 return MonoResumeThread;
4970 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4972 g_assert (thread != mono_thread_internal_current ());
4974 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4978 * mono_thread_is_foreign:
4979 * \param thread the thread to query
4981 * This function allows one to determine if a thread was created by the mono runtime and has
4982 * a well defined lifecycle or it's a foreign one, created by the native environment.
4984 * \returns TRUE if \p thread was not created by the runtime.
4987 mono_thread_is_foreign (MonoThread *thread)
4989 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4990 return info->runtime_thread == FALSE;
4994 * mono_add_joinable_thread:
4996 * Add TID to the list of joinable threads.
4997 * LOCKING: Acquires the threads lock.
5000 mono_threads_add_joinable_thread (gpointer tid)
5004 * We cannot detach from threads because it causes problems like
5005 * 2fd16f60/r114307. So we collect them and join them when
5006 * we have time (in he finalizer thread).
5008 joinable_threads_lock ();
5009 if (!joinable_threads)
5010 joinable_threads = g_hash_table_new (NULL, NULL);
5011 g_hash_table_insert (joinable_threads, tid, tid);
5012 joinable_thread_count ++;
5013 joinable_threads_unlock ();
5015 mono_gc_finalize_notify ();
5020 * mono_threads_join_threads:
5022 * Join all joinable threads. This is called from the finalizer thread.
5023 * LOCKING: Acquires the threads lock.
5026 mono_threads_join_threads (void)
5029 GHashTableIter iter;
5036 if (!joinable_thread_count)
5040 joinable_threads_lock ();
5042 if (g_hash_table_size (joinable_threads)) {
5043 g_hash_table_iter_init (&iter, joinable_threads);
5044 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5045 thread = (pthread_t)tid;
5046 g_hash_table_remove (joinable_threads, key);
5047 joinable_thread_count --;
5050 joinable_threads_unlock ();
5052 if (thread != pthread_self ()) {
5054 /* This shouldn't block */
5055 mono_threads_join_lock ();
5056 mono_native_thread_join (thread);
5057 mono_threads_join_unlock ();
5070 * Wait for thread TID to exit.
5071 * LOCKING: Acquires the threads lock.
5074 mono_thread_join (gpointer tid)
5078 gboolean found = FALSE;
5080 joinable_threads_lock ();
5081 if (!joinable_threads)
5082 joinable_threads = g_hash_table_new (NULL, NULL);
5083 if (g_hash_table_lookup (joinable_threads, tid)) {
5084 g_hash_table_remove (joinable_threads, tid);
5085 joinable_thread_count --;
5088 joinable_threads_unlock ();
5091 thread = (pthread_t)tid;
5093 mono_native_thread_join (thread);
5099 mono_thread_internal_unhandled_exception (MonoObject* exc)
5101 MonoClass *klass = exc->vtable->klass;
5102 if (is_threadabort_exception (klass)) {
5103 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5104 } else if (!is_appdomainunloaded_exception (klass)
5105 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5106 mono_unhandled_exception (exc);
5107 if (mono_environment_exitcode_get () == 1) {
5108 mono_environment_exitcode_set (255);
5109 mono_invoke_unhandled_exception_hook (exc);
5110 g_assert_not_reached ();
5116 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5119 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5120 mono_error_set_pending_exception (&error);
5124 * mono_threads_attach_coop: called by native->managed wrappers
5127 * - blocking mode: contains gc unsafe transition cookie
5128 * - non-blocking mode: contains random data
5129 * - @return: the original domain which needs to be restored, or NULL.
5132 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5135 MonoThreadInfo *info;
5138 orig = mono_domain_get ();
5141 /* Happens when called from AOTed code which is only used in the root domain. */
5142 domain = mono_get_root_domain ();
5146 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5147 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5148 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5149 * we're only responsible for making the cookie. */
5150 if (mono_threads_is_blocking_transition_enabled ())
5151 external = !(info = mono_thread_info_current_unchecked ()) || !mono_thread_info_is_live (info);
5153 if (!mono_thread_internal_current ()) {
5154 mono_thread_attach_full (domain, FALSE);
5157 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5161 mono_domain_set (domain, TRUE);
5163 if (mono_threads_is_blocking_transition_enabled ()) {
5165 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5166 * return the right cookie. */
5167 *dummy = mono_threads_enter_gc_unsafe_region_cookie ();
5169 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5170 *dummy = mono_threads_enter_gc_unsafe_region (dummy);
5178 * mono_threads_detach_coop: called by native->managed wrappers
5180 * - @cookie: the original domain which needs to be restored, or NULL.
5182 * - blocking mode: contains gc unsafe transition cookie
5183 * - non-blocking mode: contains random data
5186 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5188 MonoDomain *domain, *orig;
5190 orig = (MonoDomain*) cookie;
5192 domain = mono_domain_get ();
5195 if (mono_threads_is_blocking_transition_enabled ()) {
5196 /* it won't do anything if cookie is NULL
5197 * thread state RUNNING -> (RUNNING|BLOCKING) */
5198 mono_threads_exit_gc_unsafe_region (*dummy, dummy);
5201 if (orig != domain) {
5203 mono_domain_unset ();
5205 mono_domain_set (orig, TRUE);
5210 /* Returns TRUE if the current thread is ready to be interrupted. */
5212 mono_threads_is_ready_to_be_interrupted (void)
5214 MonoInternalThread *thread;
5216 thread = mono_thread_internal_current ();
5217 LOCK_THREAD (thread);
5218 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5219 UNLOCK_THREAD (thread);
5223 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5224 UNLOCK_THREAD (thread);
5228 UNLOCK_THREAD (thread);
5234 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5236 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5238 if (internal->thread_info) {
5239 g_string_append (text, ", state : ");
5240 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5243 if (internal->owned_mutexes) {
5246 g_string_append (text, ", owns : [");
5247 for (i = 0; i < internal->owned_mutexes->len; i++)
5248 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5249 g_string_append (text, "]");
5254 mono_thread_internal_is_current (MonoInternalThread *internal)
5256 g_assert (internal);
5257 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));