3 * Thread support internal calls
6 * Dick Porter (dick@ximian.com)
7 * Paolo Molaro (lupus@ximian.com)
8 * Patrik Torstensson (patrik.torstensson@labs2.com)
10 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
11 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
12 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
13 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
21 #include <mono/metadata/object.h>
22 #include <mono/metadata/domain-internals.h>
23 #include <mono/metadata/profiler-private.h>
24 #include <mono/metadata/threads.h>
25 #include <mono/metadata/threads-types.h>
26 #include <mono/metadata/exception.h>
27 #include <mono/metadata/environment.h>
28 #include <mono/metadata/monitor.h>
29 #include <mono/metadata/gc-internals.h>
30 #include <mono/metadata/marshal.h>
31 #include <mono/metadata/runtime.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/debug-internals.h>
34 #include <mono/utils/monobitset.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/mono-threads-coop.h>
41 #include <mono/utils/hazard-pointer.h>
42 #include <mono/utils/mono-tls.h>
43 #include <mono/utils/atomic.h>
44 #include <mono/utils/mono-memory-model.h>
45 #include <mono/utils/mono-error-internals.h>
46 #include <mono/utils/os-event.h>
47 #include <mono/utils/mono-threads-debug.h>
48 #include <mono/metadata/w32handle.h>
49 #include <mono/metadata/w32event.h>
50 #include <mono/metadata/w32mutex.h>
52 #include <mono/metadata/reflection-internals.h>
53 #include <mono/metadata/abi-details.h>
54 #include <mono/metadata/w32error.h>
55 #include <mono/utils/w32api.h>
61 #if defined(HOST_WIN32)
65 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
66 #define USE_TKILL_ON_ANDROID 1
69 #ifdef PLATFORM_ANDROID
72 #ifdef USE_TKILL_ON_ANDROID
73 extern int tkill (pid_t tid, int signal);
77 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
78 #define THREAD_DEBUG(a)
79 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
80 #define THREAD_WAIT_DEBUG(a)
81 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
82 #define LIBGC_DEBUG(a)
84 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
85 #define SPIN_LOCK(i) do { \
86 if (SPIN_TRYLOCK (i)) \
90 #define SPIN_UNLOCK(i) i = 0
92 #define LOCK_THREAD(thread) lock_thread((thread))
93 #define UNLOCK_THREAD(thread) unlock_thread((thread))
105 typedef struct _StaticDataFreeList StaticDataFreeList;
106 struct _StaticDataFreeList {
107 StaticDataFreeList *next;
115 StaticDataFreeList *freelist;
118 /* Controls access to the 'threads' hash table */
119 static void mono_threads_lock (void);
120 static void mono_threads_unlock (void);
121 static MonoCoopMutex threads_mutex;
123 /* Controls access to the 'joinable_threads' hash table */
124 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
125 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
126 static mono_mutex_t joinable_threads_mutex;
128 /* Holds current status of static data heap */
129 static StaticDataInfo thread_static_info;
130 static StaticDataInfo context_static_info;
132 /* The hash of existing threads (key is thread ID, value is
133 * MonoInternalThread*) that need joining before exit
135 static MonoGHashTable *threads=NULL;
137 /* List of app context GC handles.
138 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
140 static GHashTable *contexts = NULL;
142 /* Cleanup queue for contexts. */
143 static MonoReferenceQueue *context_queue;
146 * Threads which are starting up and they are not in the 'threads' hash yet.
147 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
148 * Protected by mono_threads_lock ().
150 static MonoGHashTable *threads_starting_up = NULL;
153 /* Protected by the threads lock */
154 static GHashTable *joinable_threads;
155 static int joinable_thread_count;
157 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
158 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
160 /* function called at thread start */
161 static MonoThreadStartCB mono_thread_start_cb = NULL;
163 /* function called at thread attach */
164 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
166 /* function called at thread cleanup */
167 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
169 /* The default stack size for each thread */
170 static guint32 default_stacksize = 0;
171 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
173 static void context_adjust_static_data (MonoAppContext *ctx);
174 static void mono_free_static_data (gpointer* static_data);
175 static void mono_init_static_data_info (StaticDataInfo *static_data);
176 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
177 static gboolean mono_thread_resume (MonoInternalThread* thread);
178 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
179 static void self_abort_internal (MonoError *error);
180 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
181 static void self_suspend_internal (void);
183 static MonoException* mono_thread_execute_interruption (void);
184 static void ref_stack_destroy (gpointer rs);
186 /* Spin lock for InterlockedXXX 64 bit functions */
187 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
188 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
189 static mono_mutex_t interlocked_mutex;
191 /* global count of thread interruptions requested */
192 static gint32 thread_interruption_requested = 0;
194 /* Event signaled when a thread changes its background mode */
195 static MonoOSEvent background_change_event;
197 static gboolean shutting_down = FALSE;
199 static gint32 managed_thread_id_counter = 0;
201 /* Class lazy loading functions */
202 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, "System", "AppDomainUnloadedException")
205 mono_threads_lock (void)
207 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
211 mono_threads_unlock (void)
213 mono_locks_coop_release (&threads_mutex, ThreadsLock);
218 get_next_managed_thread_id (void)
220 return InterlockedIncrement (&managed_thread_id_counter);
224 * We separate interruptions/exceptions into either sync (they can be processed anytime,
225 * normally as soon as they are set, and are set by the same thread) and async (they can't
226 * be processed inside abort protected blocks and are normally set by other threads). We
227 * can have both a pending sync and async interruption. In this case, the sync exception is
228 * processed first. Since we clean sync flag first, mono_thread_execute_interruption must
229 * also handle all sync type exceptions before the async type exceptions.
232 INTERRUPT_SYNC_REQUESTED_BIT = 0x1,
233 INTERRUPT_ASYNC_REQUESTED_BIT = 0x2,
234 INTERRUPT_REQUESTED_MASK = 0x3,
235 ABORT_PROT_BLOCK_SHIFT = 2,
236 ABORT_PROT_BLOCK_BITS = 8,
237 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
241 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
243 gsize state = thread->thread_state;
244 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
248 mono_threads_begin_abort_protected_block (void)
250 MonoInternalThread *thread = mono_thread_internal_current ();
251 gsize old_state, new_state;
254 old_state = thread->thread_state;
256 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
257 //bounds check abort_prot_count
258 g_assert (new_val > 0);
259 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
261 new_state = old_state + (1 << ABORT_PROT_BLOCK_SHIFT);
262 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
264 /* Defer async request since we won't be able to process until exiting the block */
265 if (new_val == 1 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
266 InterlockedDecrement (&thread_interruption_requested);
267 THREADS_INTERRUPT_DEBUG ("[%d] begin abort protected block old_state %ld new_state %ld, defer tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
268 if (thread_interruption_requested < 0)
269 g_warning ("bad thread_interruption_requested state");
271 THREADS_INTERRUPT_DEBUG ("[%d] begin abort protected block old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
276 mono_thread_state_has_interruption (gsize state)
278 /* pending exception, self abort */
279 if (state & INTERRUPT_SYNC_REQUESTED_BIT)
282 /* abort, interruption, suspend */
283 if ((state & INTERRUPT_ASYNC_REQUESTED_BIT) && !(state & ABORT_PROT_BLOCK_MASK))
290 mono_threads_end_abort_protected_block (void)
292 MonoInternalThread *thread = mono_thread_internal_current ();
293 gsize old_state, new_state;
296 old_state = thread->thread_state;
298 //bounds check abort_prot_count
299 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
300 g_assert (new_val >= 0);
301 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
303 new_state = old_state - (1 << ABORT_PROT_BLOCK_SHIFT);
304 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
306 if (new_val == 0 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
307 InterlockedIncrement (&thread_interruption_requested);
308 THREADS_INTERRUPT_DEBUG ("[%d] end abort protected block old_state %ld new_state %ld, restore tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
310 THREADS_INTERRUPT_DEBUG ("[%d] end abort protected block old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
313 return mono_thread_state_has_interruption (new_state);
317 mono_thread_get_interruption_requested (MonoInternalThread *thread)
319 gsize state = thread->thread_state;
321 return mono_thread_state_has_interruption (state);
325 * Returns TRUE is there was a state change
326 * We clear a single interruption request, sync has priority.
329 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
331 gsize old_state, new_state;
333 old_state = thread->thread_state;
335 // no interruption to process
336 if (!(old_state & INTERRUPT_SYNC_REQUESTED_BIT) &&
337 (!(old_state & INTERRUPT_ASYNC_REQUESTED_BIT) || (old_state & ABORT_PROT_BLOCK_MASK)))
340 if (old_state & INTERRUPT_SYNC_REQUESTED_BIT)
341 new_state = old_state & ~INTERRUPT_SYNC_REQUESTED_BIT;
343 new_state = old_state & ~INTERRUPT_ASYNC_REQUESTED_BIT;
344 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
346 InterlockedDecrement (&thread_interruption_requested);
347 THREADS_INTERRUPT_DEBUG ("[%d] clear interruption old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
348 if (thread_interruption_requested < 0)
349 g_warning ("bad thread_interruption_requested state");
353 /* Returns TRUE is there was a state change and the interruption can be processed */
355 mono_thread_set_interruption_requested (MonoInternalThread *thread)
357 //always force when the current thread is doing it to itself.
358 gboolean sync = thread == mono_thread_internal_current ();
359 gsize old_state, new_state;
361 old_state = thread->thread_state;
364 if ((sync && (old_state & INTERRUPT_SYNC_REQUESTED_BIT)) ||
365 (!sync && (old_state & INTERRUPT_ASYNC_REQUESTED_BIT)))
369 new_state = old_state | INTERRUPT_SYNC_REQUESTED_BIT;
371 new_state = old_state | INTERRUPT_ASYNC_REQUESTED_BIT;
372 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
374 if (sync || !(new_state & ABORT_PROT_BLOCK_MASK)) {
375 InterlockedIncrement (&thread_interruption_requested);
376 THREADS_INTERRUPT_DEBUG ("[%d] set interruption on [%d] old_state %ld new_state %ld, tir %d\n", mono_thread_internal_current ()->small_id, thread->small_id, old_state, new_state, thread_interruption_requested);
378 THREADS_INTERRUPT_DEBUG ("[%d] set interruption on [%d] old_state %ld new_state %ld, tir deferred %d\n", mono_thread_internal_current ()->small_id, thread->small_id, old_state, new_state, thread_interruption_requested);
381 return sync || !(new_state & ABORT_PROT_BLOCK_MASK);
384 static inline MonoNativeThreadId
385 thread_get_tid (MonoInternalThread *thread)
387 /* We store the tid as a guint64 to keep the object layout constant between platforms */
388 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
391 static void ensure_synch_cs_set (MonoInternalThread *thread)
393 MonoCoopMutex *synch_cs;
395 if (thread->synch_cs != NULL) {
399 synch_cs = g_new0 (MonoCoopMutex, 1);
400 mono_coop_mutex_init_recursive (synch_cs);
402 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
403 synch_cs, NULL) != NULL) {
404 /* Another thread must have installed this CS */
405 mono_coop_mutex_destroy (synch_cs);
411 lock_thread (MonoInternalThread *thread)
413 if (!thread->synch_cs)
414 ensure_synch_cs_set (thread);
416 g_assert (thread->synch_cs);
418 mono_coop_mutex_lock (thread->synch_cs);
422 unlock_thread (MonoInternalThread *thread)
424 mono_coop_mutex_unlock (thread->synch_cs);
427 static inline gboolean
428 is_appdomainunloaded_exception (MonoClass *klass)
430 return klass == mono_class_get_appdomain_unloaded_exception_class ();
433 static inline gboolean
434 is_threadabort_exception (MonoClass *klass)
436 return klass == mono_defaults.threadabortexception_class;
440 * A special static data offset (guint32) consists of 3 parts:
442 * [0] 6-bit index into the array of chunks.
443 * [6] 25-bit offset into the array.
444 * [31] Bit indicating thread or context static.
449 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
460 } SpecialStaticOffset;
462 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
463 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
465 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
466 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
467 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
468 (((SpecialStaticOffset *) &(x))->fields.f)
471 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
473 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
475 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
476 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
478 return ((char *) thread->static_data [idx]) + off;
482 get_context_static_data (MonoAppContext *ctx, guint32 offset)
484 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
486 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
487 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
489 return ((char *) ctx->static_data [idx]) + off;
493 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
495 static MonoClassField *current_thread_field = NULL;
499 if (!current_thread_field) {
500 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
501 g_assert (current_thread_field);
504 mono_class_vtable (domain, mono_defaults.thread_class);
505 mono_domain_lock (domain);
506 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
507 mono_domain_unlock (domain);
510 return (MonoThread **)get_thread_static_data (thread, offset);
514 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
516 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
518 g_assert (current->obj.vtable->domain == domain);
520 g_assert (!*current_thread_ptr);
521 *current_thread_ptr = current;
525 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
531 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
534 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
535 /* only possible failure mode is OOM, from which we don't expect to recover. */
536 mono_error_assert_ok (&error);
538 MONO_OBJECT_SETREF (thread, internal_thread, internal);
543 static MonoInternalThread*
544 create_internal_thread_object (void)
547 MonoInternalThread *thread;
550 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
551 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
552 /* only possible failure mode is OOM, from which we don't exect to recover */
553 mono_error_assert_ok (&error);
555 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
556 mono_coop_mutex_init_recursive (thread->synch_cs);
558 thread->apartment_state = ThreadApartmentState_Unknown;
559 thread->managed_id = get_next_managed_thread_id ();
560 if (mono_gc_is_moving ()) {
561 thread->thread_pinning_ref = thread;
562 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
565 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
567 thread->suspended = g_new0 (MonoOSEvent, 1);
568 mono_os_event_init (thread->suspended, TRUE);
574 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
578 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
579 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
580 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
585 g_assert (internal->native_handle);
587 res = SetThreadPriority (internal->native_handle, priority - 2);
589 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
590 #else /* HOST_WIN32 */
593 struct sched_param param;
596 tid = thread_get_tid (internal);
598 res = pthread_getschedparam (tid, &policy, ¶m);
600 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
602 #ifdef _POSIX_PRIORITY_SCHEDULING
605 /* Necessary to get valid priority range */
607 min = sched_get_priority_min (policy);
608 max = sched_get_priority_max (policy);
610 if (max > 0 && min >= 0 && max > min) {
611 double srange, drange, sposition, dposition;
612 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
614 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
615 dposition = (sposition / srange) * drange;
616 param.sched_priority = (int)(dposition + min);
623 param.sched_priority = 50;
629 param.sched_priority = 0;
632 g_warning ("%s: unknown policy %d", __func__, policy);
637 res = pthread_setschedparam (tid, policy, ¶m);
640 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
643 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
645 #endif /* HOST_WIN32 */
649 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
652 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain)
654 MonoThreadInfo *info;
655 MonoInternalThread *internal;
656 MonoDomain *domain, *root_domain;
660 info = mono_thread_info_current ();
662 internal = thread->internal_thread;
663 internal->handle = mono_threads_open_thread_handle (info->handle);
665 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
667 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
668 internal->thread_info = info;
669 internal->small_id = info->small_id;
671 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
673 SET_CURRENT_OBJECT (internal);
675 domain = mono_object_domain (thread);
677 mono_thread_push_appdomain_ref (domain);
678 if (!mono_domain_set (domain, force_domain)) {
679 mono_thread_pop_appdomain_ref ();
683 mono_threads_lock ();
685 if (threads_starting_up)
686 mono_g_hash_table_remove (threads_starting_up, thread);
688 if (shutting_down && !force_attach) {
689 mono_threads_unlock ();
690 mono_thread_pop_appdomain_ref ();
695 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
698 /* We don't need to duplicate thread->handle, because it is
699 * only closed when the thread object is finalized by the GC. */
700 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
702 /* We have to do this here because mono_thread_start_cb
703 * requires that root_domain_thread is set up. */
704 if (thread_static_info.offset || thread_static_info.idx > 0) {
705 /* get the current allocated size */
706 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
707 mono_alloc_static_data (&internal->static_data, offset, TRUE);
710 mono_threads_unlock ();
712 root_domain = mono_get_root_domain ();
714 g_assert (!internal->root_domain_thread);
715 if (domain != root_domain)
716 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
718 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
720 if (domain != root_domain)
721 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
723 set_current_thread_for_domain (domain, internal, thread);
725 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
733 MonoObject *start_delegate;
734 MonoObject *start_delegate_arg;
735 MonoThreadStart start_func;
736 gpointer start_func_arg;
737 gboolean force_attach;
739 MonoCoopSem registered;
742 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
745 MonoThreadStart start_func;
746 void *start_func_arg;
749 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
753 MonoInternalThread *internal;
754 MonoObject *start_delegate;
755 MonoObject *start_delegate_arg;
758 thread = start_info->thread;
759 internal = thread->internal_thread;
760 domain = mono_object_domain (start_info->thread);
762 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
764 if (!mono_thread_attach_internal (thread, start_info->force_attach, FALSE)) {
765 start_info->failed = TRUE;
767 mono_coop_sem_post (&start_info->registered);
769 if (InterlockedDecrement (&start_info->ref) == 0) {
770 mono_coop_sem_destroy (&start_info->registered);
777 mono_thread_internal_set_priority (internal, internal->priority);
781 start_delegate = start_info->start_delegate;
782 start_delegate_arg = start_info->start_delegate_arg;
783 start_func = start_info->start_func;
784 start_func_arg = start_info->start_func_arg;
786 /* This MUST be called before any managed code can be
787 * executed, as it calls the callback function that (for the
788 * jit) sets the lmf marker.
791 if (mono_thread_start_cb)
792 mono_thread_start_cb (tid, stack_ptr, start_func);
794 /* On 2.0 profile (and higher), set explicitly since state might have been
796 if (internal->apartment_state == ThreadApartmentState_Unknown)
797 internal->apartment_state = ThreadApartmentState_MTA;
799 mono_thread_init_apartment_state ();
801 /* Let the thread that called Start() know we're ready */
802 mono_coop_sem_post (&start_info->registered);
804 if (InterlockedDecrement (&start_info->ref) == 0) {
805 mono_coop_sem_destroy (&start_info->registered);
809 /* start_info is not valid anymore */
813 * Call this after calling start_notify, since the profiler callback might want
814 * to lock the thread, and the lock is held by thread_start () which waits for
817 mono_profiler_thread_start (tid);
819 /* if the name was set before starting, we didn't invoke the profiler callback */
820 if (internal->name) {
821 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
822 mono_profiler_thread_name (internal->tid, tname);
823 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
827 /* start_func is set only for unmanaged start functions */
829 start_func (start_func_arg);
833 g_assert (start_delegate != NULL);
835 /* we may want to handle the exception here. See comment below on unhandled exceptions */
836 args [0] = (gpointer) start_delegate_arg;
837 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
839 if (!mono_error_ok (&error)) {
840 MonoException *ex = mono_error_convert_to_exception (&error);
842 g_assert (ex != NULL);
843 MonoClass *klass = mono_object_get_class (&ex->object);
844 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
845 !is_threadabort_exception (klass)) {
846 mono_unhandled_exception (&ex->object);
847 mono_invoke_unhandled_exception_hook (&ex->object);
848 g_assert_not_reached ();
851 mono_error_cleanup (&error);
855 /* If the thread calls ExitThread at all, this remaining code
856 * will not be executed, but the main thread will eventually
857 * call mono_thread_detach_internal() on this thread's behalf.
860 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
862 /* Do any cleanup needed for apartment state. This
863 * cannot be done in mono_thread_detach_internal since
864 * mono_thread_detach_internal could be called for a
865 * thread other than the current thread.
866 * mono_thread_cleanup_apartment_state cleans up apartment
867 * for the current thead */
868 mono_thread_cleanup_apartment_state ();
870 mono_thread_detach_internal (internal);
878 start_wrapper (gpointer data)
880 StartInfo *start_info;
881 MonoThreadInfo *info;
884 start_info = (StartInfo*) data;
885 g_assert (start_info);
887 info = mono_thread_info_attach (&res);
888 info->runtime_thread = TRUE;
890 /* Run the actual main function of the thread */
891 res = start_wrapper_internal (start_info, &res);
893 mono_thread_info_exit (res);
895 g_assert_not_reached ();
901 * Common thread creation code.
902 * LOCKING: Acquires the threads lock.
905 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
906 MonoThreadCreateFlags flags, MonoError *error)
908 StartInfo *start_info = NULL;
909 MonoNativeThreadId tid;
911 gsize stack_set_size;
914 g_assert (!start_func && !start_func_arg);
916 g_assert (!start_delegate);
918 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
919 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
920 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
922 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
923 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
924 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
928 * Join joinable threads to prevent running out of threads since the finalizer
929 * thread might be blocked/backlogged.
931 mono_threads_join_threads ();
935 mono_threads_lock ();
936 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
937 mono_threads_unlock ();
940 if (threads_starting_up == NULL) {
941 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
943 mono_g_hash_table_insert (threads_starting_up, thread, thread);
944 mono_threads_unlock ();
946 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
947 if (internal->threadpool_thread)
948 mono_thread_set_state (internal, ThreadState_Background);
950 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
952 start_info = g_new0 (StartInfo, 1);
954 start_info->thread = thread;
955 start_info->start_delegate = start_delegate;
956 start_info->start_delegate_arg = thread->start_obj;
957 start_info->start_func = start_func;
958 start_info->start_func_arg = start_func_arg;
959 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
960 start_info->failed = FALSE;
961 mono_coop_sem_init (&start_info->registered, 0);
963 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
964 stack_set_size = default_stacksize_for_thread (internal);
968 if (!mono_thread_platform_create_thread (start_wrapper, start_info, &stack_set_size, &tid)) {
969 /* The thread couldn't be created, so set an exception */
970 mono_threads_lock ();
971 mono_g_hash_table_remove (threads_starting_up, thread);
972 mono_threads_unlock ();
973 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
974 /* ref is not going to be decremented in start_wrapper_internal */
975 InterlockedDecrement (&start_info->ref);
980 internal->stack_size = (int) stack_set_size;
982 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
985 * Wait for the thread to set up its TLS data etc, so
986 * theres no potential race condition if someone tries
987 * to look up the data believing the thread has
991 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
993 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
995 ret = !start_info->failed;
998 if (InterlockedDecrement (&start_info->ref) == 0) {
999 mono_coop_sem_destroy (&start_info->registered);
1000 g_free (start_info);
1006 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1008 if (mono_thread_start_cb) {
1009 mono_thread_start_cb (tid, stack_start, func);
1013 void mono_threads_set_default_stacksize (guint32 stacksize)
1015 default_stacksize = stacksize;
1018 guint32 mono_threads_get_default_stacksize (void)
1020 return default_stacksize;
1024 * mono_thread_create_internal:
1026 * ARG should not be a GC reference.
1029 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1032 MonoInternalThread *internal;
1037 internal = create_internal_thread_object ();
1039 thread = create_thread_object (domain, internal);
1041 LOCK_THREAD (internal);
1043 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1045 UNLOCK_THREAD (internal);
1047 return_val_if_nok (error, NULL);
1052 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1055 if (!mono_thread_create_checked (domain, func, arg, &error))
1056 mono_error_cleanup (&error);
1060 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1062 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1066 mono_thread_attach (MonoDomain *domain)
1068 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1074 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1076 MonoInternalThread *internal;
1078 MonoThreadInfo *info;
1079 MonoNativeThreadId tid;
1082 if (mono_thread_internal_current_is_attached ()) {
1083 if (domain != mono_domain_get ())
1084 mono_domain_set (domain, TRUE);
1085 /* Already attached */
1086 return mono_thread_current ();
1089 info = mono_thread_info_attach (&stack_ptr);
1092 tid=mono_native_thread_id_get ();
1094 internal = create_internal_thread_object ();
1096 thread = create_thread_object (domain, internal);
1098 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1099 /* Mono is shutting down, so just wait for the end */
1101 mono_thread_info_sleep (10000, NULL);
1104 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1106 if (mono_thread_attach_cb) {
1110 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1113 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1115 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1118 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1119 if (!mono_thread_info_current ()->tools_thread)
1120 // FIXME: Need a separate callback
1121 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1127 mono_thread_detach_internal (MonoInternalThread *thread)
1131 g_assert (thread != NULL);
1133 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1136 mono_w32mutex_abandon ();
1139 if (thread->abort_state_handle) {
1140 mono_gchandle_free (thread->abort_state_handle);
1141 thread->abort_state_handle = 0;
1144 thread->abort_exc = NULL;
1145 thread->current_appcontext = NULL;
1148 * thread->synch_cs can be NULL if this was called after
1149 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1150 * This can happen only during shutdown.
1151 * The shutting_down flag is not always set, so we can't assert on it.
1153 if (thread->synch_cs)
1154 LOCK_THREAD (thread);
1156 thread->state |= ThreadState_Stopped;
1157 thread->state &= ~ThreadState_Background;
1159 if (thread->synch_cs)
1160 UNLOCK_THREAD (thread);
1163 An interruption request has leaked to cleanup. Adjust the global counter.
1165 This can happen is the abort source thread finds the abortee (this) thread
1166 in unmanaged code. If this thread never trips back to managed code or check
1167 the local flag it will be left set and positively unbalance the global counter.
1169 Leaving the counter unbalanced will cause a performance degradation since all threads
1170 will now keep checking their local flags all the time.
1172 mono_thread_clear_interruption_requested (thread);
1174 mono_threads_lock ();
1178 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1179 /* We have to check whether the thread object for the
1180 * tid is still the same in the table because the
1181 * thread might have been destroyed and the tid reused
1182 * in the meantime, in which case the tid would be in
1183 * the table, but with another thread object.
1187 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1191 mono_threads_unlock ();
1193 /* Don't close the handle here, wait for the object finalizer
1194 * to do it. Otherwise, the following race condition applies:
1196 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1198 * 2) Some other handle is reassigned the same slot
1200 * 3) Another thread tries to join the first thread, and
1201 * blocks waiting for the reassigned handle to be signalled
1202 * (which might never happen). This is possible, because the
1203 * thread calling Join() still has a reference to the first
1207 /* if the thread is not in the hash it has been removed already */
1209 mono_domain_unset ();
1210 mono_memory_barrier ();
1212 if (mono_thread_cleanup_fn)
1213 mono_thread_cleanup_fn (thread_get_tid (thread));
1218 mono_release_type_locks (thread);
1220 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1221 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1222 mono_profiler_thread_end (thread->tid);
1224 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1227 * This will signal async signal handlers that the thread has exited.
1228 * The profiler callback needs this to be set, so it cannot be done earlier.
1230 mono_domain_unset ();
1231 mono_memory_barrier ();
1233 if (thread == mono_thread_internal_current ())
1234 mono_thread_pop_appdomain_ref ();
1236 mono_free_static_data (thread->static_data);
1237 thread->static_data = NULL;
1238 ref_stack_destroy (thread->appdomain_refs);
1239 thread->appdomain_refs = NULL;
1241 g_assert (thread->suspended);
1242 mono_os_event_destroy (thread->suspended);
1243 g_free (thread->suspended);
1244 thread->suspended = NULL;
1246 if (mono_thread_cleanup_fn)
1247 mono_thread_cleanup_fn (thread_get_tid (thread));
1249 mono_memory_barrier ();
1251 if (mono_gc_is_moving ()) {
1252 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1253 thread->thread_pinning_ref = NULL;
1257 SET_CURRENT_OBJECT (NULL);
1258 mono_domain_unset ();
1260 /* Don't need to close the handle to this thread, even though we took a
1261 * reference in mono_thread_attach (), because the GC will do it
1262 * when the Thread object is finalised.
1267 mono_thread_detach (MonoThread *thread)
1270 mono_thread_detach_internal (thread->internal_thread);
1274 * mono_thread_detach_if_exiting:
1276 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1277 * This should be used at the end of embedding code which calls into managed code, and which
1278 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1281 mono_thread_detach_if_exiting (void)
1283 if (mono_thread_info_is_exiting ()) {
1284 MonoInternalThread *thread;
1286 thread = mono_thread_internal_current ();
1288 mono_thread_detach_internal (thread);
1289 mono_thread_info_detach ();
1297 mono_thread_internal_current_is_attached (void)
1299 MonoInternalThread *internal;
1301 internal = GET_CURRENT_OBJECT ();
1309 mono_thread_exit (void)
1311 MonoInternalThread *thread = mono_thread_internal_current ();
1313 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1315 mono_thread_detach_internal (thread);
1317 /* we could add a callback here for embedders to use. */
1318 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1319 exit (mono_environment_exitcode_get ());
1321 mono_thread_info_exit (0);
1325 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1327 MonoInternalThread *internal;
1329 internal = create_internal_thread_object ();
1331 internal->state = ThreadState_Unstarted;
1333 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1337 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1339 return mono_thread_current ();
1343 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1347 MonoInternalThread *internal;
1350 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1352 if (!this_obj->internal_thread)
1353 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1354 internal = this_obj->internal_thread;
1356 LOCK_THREAD (internal);
1358 if ((internal->state & ThreadState_Unstarted) == 0) {
1359 UNLOCK_THREAD (internal);
1360 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1364 if ((internal->state & ThreadState_Aborted) != 0) {
1365 UNLOCK_THREAD (internal);
1369 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1371 mono_error_cleanup (&error);
1372 UNLOCK_THREAD (internal);
1376 internal->state &= ~ThreadState_Unstarted;
1378 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1380 UNLOCK_THREAD (internal);
1381 return internal->handle;
1385 * This is called from the finalizer of the internal thread object.
1388 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1390 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1393 * Since threads keep a reference to their thread object while running, by
1394 * the time this function is called, the thread has already exited/detached,
1395 * i.e. mono_thread_detach_internal () has ran. The exception is during
1396 * shutdown, when mono_thread_detach_internal () can be called after this.
1398 if (this_obj->handle) {
1399 mono_threads_close_thread_handle (this_obj->handle);
1400 this_obj->handle = NULL;
1404 CloseHandle (this_obj->native_handle);
1407 if (this_obj->synch_cs) {
1408 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1409 this_obj->synch_cs = NULL;
1410 mono_coop_mutex_destroy (synch_cs);
1414 if (this_obj->name) {
1415 void *name = this_obj->name;
1416 this_obj->name = NULL;
1422 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1425 MonoInternalThread *thread = mono_thread_internal_current ();
1427 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1429 if (mono_thread_current_check_pending_interrupt ())
1433 gboolean alerted = FALSE;
1435 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1437 res = mono_thread_info_sleep (ms, &alerted);
1439 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1442 MonoException* exc = mono_thread_execute_interruption ();
1444 mono_raise_exception (exc);
1446 // FIXME: !MONO_INFINITE_WAIT
1447 if (ms != MONO_INFINITE_WAIT)
1456 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1461 ves_icall_System_Threading_Thread_GetDomainID (void)
1463 return mono_domain_get()->domain_id;
1467 ves_icall_System_Threading_Thread_Yield (void)
1469 return mono_thread_info_yield ();
1473 * mono_thread_get_name:
1475 * Return the name of the thread. NAME_LEN is set to the length of the name.
1476 * Return NULL if the thread has no name. The returned memory is owned by the
1480 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1484 LOCK_THREAD (this_obj);
1486 if (!this_obj->name) {
1490 *name_len = this_obj->name_len;
1491 res = g_new (gunichar2, this_obj->name_len);
1492 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1495 UNLOCK_THREAD (this_obj);
1501 * mono_thread_get_name_utf8:
1503 * Return the name of the thread in UTF-8.
1504 * Return NULL if the thread has no name.
1505 * The returned memory is owned by the caller.
1508 mono_thread_get_name_utf8 (MonoThread *thread)
1513 MonoInternalThread *internal = thread->internal_thread;
1514 if (internal == NULL)
1517 LOCK_THREAD (internal);
1519 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1521 UNLOCK_THREAD (internal);
1527 * mono_thread_get_managed_id:
1529 * Return the Thread.ManagedThreadId value of `thread`.
1530 * Returns -1 if `thread` is NULL.
1533 mono_thread_get_managed_id (MonoThread *thread)
1538 MonoInternalThread *internal = thread->internal_thread;
1539 if (internal == NULL)
1542 int32_t id = internal->managed_id;
1548 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1553 error_init (&error);
1555 LOCK_THREAD (this_obj);
1557 if (!this_obj->name)
1560 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1562 UNLOCK_THREAD (this_obj);
1564 if (mono_error_set_pending_exception (&error))
1571 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1573 LOCK_THREAD (this_obj);
1578 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1579 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1580 UNLOCK_THREAD (this_obj);
1582 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1585 if (this_obj->name) {
1586 g_free (this_obj->name);
1587 this_obj->name_len = 0;
1590 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1591 this_obj->name_len = mono_string_length (name);
1594 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1597 this_obj->name = NULL;
1600 UNLOCK_THREAD (this_obj);
1602 if (this_obj->name && this_obj->tid) {
1603 char *tname = mono_string_to_utf8_checked (name, error);
1604 return_if_nok (error);
1605 mono_profiler_thread_name (this_obj->tid, tname);
1606 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1612 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1615 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1616 mono_error_set_pending_exception (&error);
1620 * ves_icall_System_Threading_Thread_GetPriority_internal:
1621 * @param this_obj: The MonoInternalThread on which to operate.
1623 * Gets the priority of the given thread.
1624 * @return: The priority of the given thread.
1627 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1630 MonoInternalThread *internal = this_obj->internal_thread;
1632 LOCK_THREAD (internal);
1633 priority = internal->priority;
1634 UNLOCK_THREAD (internal);
1640 * ves_icall_System_Threading_Thread_SetPriority_internal:
1641 * @param this_obj: The MonoInternalThread on which to operate.
1642 * @param priority: The priority to set.
1644 * Sets the priority of the given thread.
1647 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1649 MonoInternalThread *internal = this_obj->internal_thread;
1651 LOCK_THREAD (internal);
1652 internal->priority = priority;
1653 if (internal->thread_info != NULL)
1654 mono_thread_internal_set_priority (internal, priority);
1655 UNLOCK_THREAD (internal);
1658 /* If the array is already in the requested domain, we just return it,
1659 otherwise we return a copy in that domain. */
1661 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1669 if (mono_object_domain (arr) == domain)
1672 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1673 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1678 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1681 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1682 mono_error_set_pending_exception (&error);
1687 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1690 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1691 mono_error_set_pending_exception (&error);
1696 mono_thread_current (void)
1698 MonoDomain *domain = mono_domain_get ();
1699 MonoInternalThread *internal = mono_thread_internal_current ();
1700 MonoThread **current_thread_ptr;
1702 g_assert (internal);
1703 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1705 if (!*current_thread_ptr) {
1706 g_assert (domain != mono_get_root_domain ());
1707 *current_thread_ptr = create_thread_object (domain, internal);
1709 return *current_thread_ptr;
1712 /* Return the thread object belonging to INTERNAL in the current domain */
1714 mono_thread_current_for_thread (MonoInternalThread *internal)
1716 MonoDomain *domain = mono_domain_get ();
1717 MonoThread **current_thread_ptr;
1719 g_assert (internal);
1720 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1722 if (!*current_thread_ptr) {
1723 g_assert (domain != mono_get_root_domain ());
1724 *current_thread_ptr = create_thread_object (domain, internal);
1726 return *current_thread_ptr;
1730 mono_thread_internal_current (void)
1732 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1733 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1737 static MonoThreadInfoWaitRet
1738 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1741 MonoThreadInfoWaitRet ret;
1748 start = (ms == -1) ? 0 : mono_msec_ticks ();
1751 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1754 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1757 exc = mono_thread_execute_interruption ();
1759 mono_error_set_exception_instance (error, exc);
1766 /* Re-calculate ms according to the time passed */
1767 diff_ms = (gint32)(mono_msec_ticks () - start);
1768 if (diff_ms >= ms) {
1769 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1772 wait = ms - diff_ms;
1779 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1781 MonoInternalThread *thread = this_obj->internal_thread;
1782 MonoThreadHandle *handle = thread->handle;
1783 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1787 if (mono_thread_current_check_pending_interrupt ())
1790 LOCK_THREAD (thread);
1792 if ((thread->state & ThreadState_Unstarted) != 0) {
1793 UNLOCK_THREAD (thread);
1795 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1799 UNLOCK_THREAD (thread);
1802 ms=MONO_INFINITE_WAIT;
1804 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1806 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1808 ret=mono_join_uninterrupted (handle, ms, &error);
1810 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1812 mono_error_set_pending_exception (&error);
1814 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1815 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1820 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1825 #define MANAGED_WAIT_FAILED 0x7fffffff
1828 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1830 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1831 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1832 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1833 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1834 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1835 return WAIT_IO_COMPLETION;
1836 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1837 return WAIT_TIMEOUT;
1838 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1839 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1840 return MANAGED_WAIT_FAILED;
1842 g_error ("%s: unknown val value %d", __func__, val);
1846 static MonoW32HandleWaitRet
1847 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1850 MonoW32HandleWaitRet ret;
1857 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1861 if (numhandles != 1)
1862 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1864 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1866 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1867 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1868 #endif /* HOST_WIN32 */
1871 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1874 exc = mono_thread_execute_interruption ();
1876 mono_error_set_exception_instance (error, exc);
1883 /* Re-calculate ms according to the time passed */
1884 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1885 if (diff_ms >= ms) {
1886 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1889 wait = ms - diff_ms;
1895 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1900 MonoW32HandleWaitRet ret;
1902 MonoObject *waitHandle;
1903 MonoInternalThread *thread = mono_thread_internal_current ();
1905 /* Do this WaitSleepJoin check before creating objects */
1906 if (mono_thread_current_check_pending_interrupt ())
1907 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1909 /* We fail in managed if the array has more than 64 elements */
1910 numhandles = (guint32)mono_array_length(mono_handles);
1911 handles = g_new0(HANDLE, numhandles);
1913 for(i = 0; i < numhandles; i++) {
1914 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1915 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1919 ms=MONO_INFINITE_WAIT;
1922 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1924 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1926 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1930 mono_error_set_pending_exception (&error);
1932 return map_native_wait_result_to_managed (ret, numhandles);
1935 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1938 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1939 uintptr_t numhandles;
1940 MonoW32HandleWaitRet ret;
1942 MonoObject *waitHandle;
1943 MonoInternalThread *thread = mono_thread_internal_current ();
1945 /* Do this WaitSleepJoin check before creating objects */
1946 if (mono_thread_current_check_pending_interrupt ())
1947 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1949 numhandles = mono_array_length(mono_handles);
1950 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1951 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1953 for(i = 0; i < numhandles; i++) {
1954 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1955 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1959 ms=MONO_INFINITE_WAIT;
1962 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1964 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1966 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1968 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1970 mono_error_set_pending_exception (&error);
1972 return map_native_wait_result_to_managed (ret, numhandles);
1975 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1978 MonoW32HandleWaitRet ret;
1979 MonoInternalThread *thread = mono_thread_internal_current ();
1981 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1984 ms=MONO_INFINITE_WAIT;
1987 if (mono_thread_current_check_pending_interrupt ())
1988 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1990 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1992 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1994 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1996 mono_error_set_pending_exception (&error);
1997 return map_native_wait_result_to_managed (ret, 1);
2001 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
2003 MonoW32HandleWaitRet ret;
2004 MonoInternalThread *thread = mono_thread_internal_current ();
2007 ms = MONO_INFINITE_WAIT;
2009 if (mono_thread_current_check_pending_interrupt ())
2010 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2012 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2016 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
2018 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
2022 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2024 return map_native_wait_result_to_managed (ret, 1);
2027 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2029 return InterlockedIncrement (location);
2032 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2034 #if SIZEOF_VOID_P == 4
2035 if (G_UNLIKELY ((size_t)location & 0x7)) {
2037 mono_interlocked_lock ();
2040 mono_interlocked_unlock ();
2044 return InterlockedIncrement64 (location);
2047 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2049 return InterlockedDecrement(location);
2052 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2054 #if SIZEOF_VOID_P == 4
2055 if (G_UNLIKELY ((size_t)location & 0x7)) {
2057 mono_interlocked_lock ();
2060 mono_interlocked_unlock ();
2064 return InterlockedDecrement64 (location);
2067 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2069 return InterlockedExchange(location, value);
2072 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2075 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2076 mono_gc_wbarrier_generic_nostore (location);
2080 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2082 return InterlockedExchangePointer(location, value);
2085 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2087 IntFloatUnion val, ret;
2090 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2096 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2098 #if SIZEOF_VOID_P == 4
2099 if (G_UNLIKELY ((size_t)location & 0x7)) {
2101 mono_interlocked_lock ();
2104 mono_interlocked_unlock ();
2108 return InterlockedExchange64 (location, value);
2112 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2114 LongDoubleUnion val, ret;
2117 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2122 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2124 return InterlockedCompareExchange(location, value, comparand);
2127 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2129 gint32 r = InterlockedCompareExchange(location, value, comparand);
2130 *success = r == comparand;
2134 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2137 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2138 mono_gc_wbarrier_generic_nostore (location);
2142 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2144 return InterlockedCompareExchangePointer(location, value, comparand);
2147 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2149 IntFloatUnion val, ret, cmp;
2152 cmp.fval = comparand;
2153 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2159 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2161 #if SIZEOF_VOID_P == 8
2162 LongDoubleUnion val, comp, ret;
2165 comp.fval = comparand;
2166 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2172 mono_interlocked_lock ();
2174 if (old == comparand)
2176 mono_interlocked_unlock ();
2183 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2185 #if SIZEOF_VOID_P == 4
2186 if (G_UNLIKELY ((size_t)location & 0x7)) {
2188 mono_interlocked_lock ();
2190 if (old == comparand)
2192 mono_interlocked_unlock ();
2196 return InterlockedCompareExchange64 (location, value, comparand);
2200 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2203 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2204 mono_gc_wbarrier_generic_nostore (location);
2209 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2212 MONO_CHECK_NULL (location, NULL);
2213 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2214 mono_gc_wbarrier_generic_nostore (location);
2219 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2221 return InterlockedAdd (location, value);
2225 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2227 #if SIZEOF_VOID_P == 4
2228 if (G_UNLIKELY ((size_t)location & 0x7)) {
2230 mono_interlocked_lock ();
2233 mono_interlocked_unlock ();
2237 return InterlockedAdd64 (location, value);
2241 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2243 #if SIZEOF_VOID_P == 4
2244 if (G_UNLIKELY ((size_t)location & 0x7)) {
2246 mono_interlocked_lock ();
2248 mono_interlocked_unlock ();
2252 return InterlockedRead64 (location);
2256 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2258 mono_memory_barrier ();
2262 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2264 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2266 if (state & ThreadState_Background) {
2267 /* If the thread changes the background mode, the main thread has to
2268 * be notified, since it has to rebuild the list of threads to
2271 mono_os_event_set (&background_change_event);
2276 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2278 mono_thread_set_state (this_obj, (MonoThreadState)state);
2280 if (state & ThreadState_Background) {
2281 /* If the thread changes the background mode, the main thread has to
2282 * be notified, since it has to rebuild the list of threads to
2285 mono_os_event_set (&background_change_event);
2290 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2294 LOCK_THREAD (this_obj);
2296 state = this_obj->state;
2298 UNLOCK_THREAD (this_obj);
2303 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2305 MonoInternalThread *current;
2307 MonoInternalThread *thread = this_obj->internal_thread;
2309 LOCK_THREAD (thread);
2311 current = mono_thread_internal_current ();
2313 thread->thread_interrupt_requested = TRUE;
2314 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2316 UNLOCK_THREAD (thread);
2319 async_abort_internal (thread, FALSE);
2324 * mono_thread_current_check_pending_interrupt:
2325 * Checks if there's a interruption request and set the pending exception if so.
2326 * \returns true if a pending exception was set
2329 mono_thread_current_check_pending_interrupt (void)
2331 MonoInternalThread *thread = mono_thread_internal_current ();
2332 gboolean throw_ = FALSE;
2334 LOCK_THREAD (thread);
2336 if (thread->thread_interrupt_requested) {
2338 thread->thread_interrupt_requested = FALSE;
2341 UNLOCK_THREAD (thread);
2344 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2349 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2351 LOCK_THREAD (thread);
2353 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2355 UNLOCK_THREAD (thread);
2359 if ((thread->state & ThreadState_Unstarted) != 0) {
2360 thread->state |= ThreadState_Aborted;
2361 UNLOCK_THREAD (thread);
2365 thread->state |= ThreadState_AbortRequested;
2366 if (thread->abort_state_handle)
2367 mono_gchandle_free (thread->abort_state_handle);
2369 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2370 g_assert (thread->abort_state_handle);
2372 thread->abort_state_handle = 0;
2374 thread->abort_exc = NULL;
2376 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));
2378 /* During shutdown, we can't wait for other threads */
2380 /* Make sure the thread is awake */
2381 mono_thread_resume (thread);
2383 UNLOCK_THREAD (thread);
2388 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2390 if (!request_thread_abort (thread, state))
2393 if (thread == mono_thread_internal_current ()) {
2395 self_abort_internal (&error);
2396 mono_error_set_pending_exception (&error);
2398 async_abort_internal (thread, TRUE);
2403 * mono_thread_internal_abort:
2404 * Request thread \p thread to be aborted.
2405 * \p thread MUST NOT be the current thread.
2408 mono_thread_internal_abort (MonoInternalThread *thread)
2410 g_assert (thread != mono_thread_internal_current ());
2412 if (!request_thread_abort (thread, NULL))
2414 async_abort_internal (thread, TRUE);
2418 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2420 MonoInternalThread *thread = mono_thread_internal_current ();
2421 gboolean was_aborting;
2423 LOCK_THREAD (thread);
2424 was_aborting = thread->state & ThreadState_AbortRequested;
2425 thread->state &= ~ThreadState_AbortRequested;
2426 UNLOCK_THREAD (thread);
2428 if (!was_aborting) {
2429 const char *msg = "Unable to reset abort because no abort was requested";
2430 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2434 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2435 thread->abort_exc = NULL;
2436 if (thread->abort_state_handle) {
2437 mono_gchandle_free (thread->abort_state_handle);
2438 /* This is actually not necessary - the handle
2439 only counts if the exception is set */
2440 thread->abort_state_handle = 0;
2445 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2447 LOCK_THREAD (thread);
2449 thread->state &= ~ThreadState_AbortRequested;
2451 if (thread->abort_exc) {
2452 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2453 thread->abort_exc = NULL;
2454 if (thread->abort_state_handle) {
2455 mono_gchandle_free (thread->abort_state_handle);
2456 /* This is actually not necessary - the handle
2457 only counts if the exception is set */
2458 thread->abort_state_handle = 0;
2462 UNLOCK_THREAD (thread);
2466 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2469 MonoInternalThread *thread = this_obj->internal_thread;
2470 MonoObject *state, *deserialized = NULL;
2473 if (!thread->abort_state_handle)
2476 state = mono_gchandle_get_target (thread->abort_state_handle);
2479 domain = mono_domain_get ();
2480 if (mono_object_domain (state) == domain)
2483 deserialized = mono_object_xdomain_representation (state, domain, &error);
2485 if (!deserialized) {
2486 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2487 if (!is_ok (&error)) {
2488 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2489 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2491 mono_set_pending_exception (invalid_op_exc);
2495 return deserialized;
2499 mono_thread_suspend (MonoInternalThread *thread)
2501 LOCK_THREAD (thread);
2503 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2505 UNLOCK_THREAD (thread);
2509 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2511 UNLOCK_THREAD (thread);
2515 thread->state |= ThreadState_SuspendRequested;
2516 mono_os_event_reset (thread->suspended);
2518 if (thread == mono_thread_internal_current ()) {
2519 /* calls UNLOCK_THREAD (thread) */
2520 self_suspend_internal ();
2522 /* calls UNLOCK_THREAD (thread) */
2523 async_suspend_internal (thread, FALSE);
2530 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2532 if (!mono_thread_suspend (this_obj->internal_thread)) {
2533 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2538 /* LOCKING: LOCK_THREAD(thread) must be held */
2540 mono_thread_resume (MonoInternalThread *thread)
2542 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2543 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2544 thread->state &= ~ThreadState_SuspendRequested;
2545 mono_os_event_set (thread->suspended);
2549 if ((thread->state & ThreadState_Suspended) == 0 ||
2550 (thread->state & ThreadState_Unstarted) != 0 ||
2551 (thread->state & ThreadState_Aborted) != 0 ||
2552 (thread->state & ThreadState_Stopped) != 0)
2554 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2558 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2560 mono_os_event_set (thread->suspended);
2562 if (!thread->self_suspended) {
2563 UNLOCK_THREAD (thread);
2565 /* Awake the thread */
2566 if (!mono_thread_info_resume (thread_get_tid (thread)))
2569 LOCK_THREAD (thread);
2572 thread->state &= ~ThreadState_Suspended;
2578 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2580 if (!thread->internal_thread) {
2581 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2583 LOCK_THREAD (thread->internal_thread);
2584 if (!mono_thread_resume (thread->internal_thread))
2585 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2586 UNLOCK_THREAD (thread->internal_thread);
2591 mono_threads_is_critical_method (MonoMethod *method)
2593 switch (method->wrapper_type) {
2594 case MONO_WRAPPER_RUNTIME_INVOKE:
2595 case MONO_WRAPPER_XDOMAIN_INVOKE:
2596 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2603 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2608 if (mono_threads_is_critical_method (m)) {
2609 *((gboolean*)data) = TRUE;
2616 is_running_protected_wrapper (void)
2618 gboolean found = FALSE;
2619 mono_stack_walk (find_wrapper, &found);
2624 mono_thread_stop (MonoThread *thread)
2626 MonoInternalThread *internal = thread->internal_thread;
2628 if (!request_thread_abort (internal, NULL))
2631 if (internal == mono_thread_internal_current ()) {
2633 self_abort_internal (&error);
2635 This function is part of the embeding API and has no way to return the exception
2636 to be thrown. So what we do is keep the old behavior and raise the exception.
2638 mono_error_raise_exception (&error); /* OK to throw, see note */
2640 async_abort_internal (internal, TRUE);
2645 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2647 gint8 tmp = *(volatile gint8 *)ptr;
2648 mono_memory_barrier ();
2653 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2655 gint16 tmp = *(volatile gint16 *)ptr;
2656 mono_memory_barrier ();
2661 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2663 gint32 tmp = *(volatile gint32 *)ptr;
2664 mono_memory_barrier ();
2669 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2671 gint64 tmp = *(volatile gint64 *)ptr;
2672 mono_memory_barrier ();
2677 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2679 volatile void *tmp = *(volatile void **)ptr;
2680 mono_memory_barrier ();
2681 return (void *) tmp;
2685 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2687 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2688 mono_memory_barrier ();
2689 return (MonoObject *) tmp;
2693 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2695 double tmp = *(volatile double *)ptr;
2696 mono_memory_barrier ();
2701 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2703 float tmp = *(volatile float *)ptr;
2704 mono_memory_barrier ();
2709 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2711 return InterlockedRead8 ((volatile gint8 *)ptr);
2715 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2717 return InterlockedRead16 ((volatile gint16 *)ptr);
2721 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2723 return InterlockedRead ((volatile gint32 *)ptr);
2727 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2729 #if SIZEOF_VOID_P == 4
2730 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2732 mono_interlocked_lock ();
2733 val = *(gint64*)ptr;
2734 mono_interlocked_unlock ();
2738 return InterlockedRead64 ((volatile gint64 *)ptr);
2742 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2744 return InterlockedReadPointer ((volatile gpointer *)ptr);
2748 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2752 #if SIZEOF_VOID_P == 4
2753 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2755 mono_interlocked_lock ();
2756 val = *(double*)ptr;
2757 mono_interlocked_unlock ();
2762 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2768 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2772 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2778 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2780 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2784 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2786 mono_memory_barrier ();
2787 *(volatile gint8 *)ptr = value;
2791 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2793 mono_memory_barrier ();
2794 *(volatile gint16 *)ptr = value;
2798 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2800 mono_memory_barrier ();
2801 *(volatile gint32 *)ptr = value;
2805 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2807 mono_memory_barrier ();
2808 *(volatile gint64 *)ptr = value;
2812 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2814 mono_memory_barrier ();
2815 *(volatile void **)ptr = value;
2819 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2821 mono_memory_barrier ();
2822 mono_gc_wbarrier_generic_store (ptr, value);
2826 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2828 mono_memory_barrier ();
2829 *(volatile double *)ptr = value;
2833 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2835 mono_memory_barrier ();
2836 *(volatile float *)ptr = value;
2840 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2842 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2846 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2848 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2852 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2854 InterlockedWrite ((volatile gint32 *)ptr, value);
2858 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2860 #if SIZEOF_VOID_P == 4
2861 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2862 mono_interlocked_lock ();
2863 *(gint64*)ptr = value;
2864 mono_interlocked_unlock ();
2869 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2873 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2875 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2879 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2883 #if SIZEOF_VOID_P == 4
2884 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2885 mono_interlocked_lock ();
2886 *(double*)ptr = value;
2887 mono_interlocked_unlock ();
2894 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2898 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2904 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2908 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2910 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2914 free_context (void *user_data)
2916 ContextStaticData *data = user_data;
2918 mono_threads_lock ();
2921 * There is no guarantee that, by the point this reference queue callback
2922 * has been invoked, the GC handle associated with the object will fail to
2923 * resolve as one might expect. So if we don't free and remove the GC
2924 * handle here, free_context_static_data_helper () could end up resolving
2925 * a GC handle to an actually-dead context which would contain a pointer
2926 * to an already-freed static data segment, resulting in a crash when
2929 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2931 mono_threads_unlock ();
2933 mono_gchandle_free (data->gc_handle);
2934 mono_free_static_data (data->static_data);
2939 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2941 mono_threads_lock ();
2943 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2946 contexts = g_hash_table_new (NULL, NULL);
2949 context_queue = mono_gc_reference_queue_new (free_context);
2951 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2952 g_hash_table_insert (contexts, gch, gch);
2955 * We use this intermediate structure to contain a duplicate pointer to
2956 * the static data because we can't rely on being able to resolve the GC
2957 * handle in the reference queue callback.
2959 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2960 data->gc_handle = GPOINTER_TO_UINT (gch);
2963 context_adjust_static_data (ctx);
2964 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2966 mono_threads_unlock ();
2968 mono_profiler_context_loaded (ctx);
2972 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2975 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2976 * cleanup in exceptional circumstances, we don't actually do any
2977 * cleanup work here. We instead do this via a reference queue.
2980 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2982 mono_profiler_context_unloaded (ctx);
2985 void mono_thread_init (MonoThreadStartCB start_cb,
2986 MonoThreadAttachCB attach_cb)
2988 mono_coop_mutex_init_recursive (&threads_mutex);
2990 mono_os_mutex_init_recursive(&interlocked_mutex);
2991 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2993 mono_os_event_init (&background_change_event, FALSE);
2995 mono_init_static_data_info (&thread_static_info);
2996 mono_init_static_data_info (&context_static_info);
2998 mono_thread_start_cb = start_cb;
2999 mono_thread_attach_cb = attach_cb;
3002 void mono_thread_cleanup (void)
3004 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3005 /* The main thread must abandon any held mutexes (particularly
3006 * important for named mutexes as they are shared across
3007 * processes, see bug 74680.) This will happen when the
3008 * thread exits, but if it's not running in a subthread it
3009 * won't exit in time.
3011 mono_w32mutex_abandon ();
3015 /* This stuff needs more testing, it seems one of these
3016 * critical sections can be locked when mono_thread_cleanup is
3019 mono_coop_mutex_destroy (&threads_mutex);
3020 mono_os_mutex_destroy (&interlocked_mutex);
3021 mono_os_mutex_destroy (&delayed_free_table_mutex);
3022 mono_os_mutex_destroy (&small_id_mutex);
3023 mono_os_event_destroy (&background_change_event);
3028 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3030 mono_thread_cleanup_fn = func;
3034 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3036 thread->internal_thread->manage_callback = func;
3040 static void print_tids (gpointer key, gpointer value, gpointer user)
3042 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3043 * sizeof(uint) and a cast to uint would overflow
3045 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3046 * print this as a pointer.
3048 g_message ("Waiting for: %p", key);
3053 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3054 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3059 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3062 MonoThreadInfoWaitRet ret;
3064 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3066 /* Add the thread state change event, so it wakes
3067 * up if a thread changes to background mode. */
3070 if (check_state_change)
3071 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3073 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3076 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3077 /* See the comment in build_wait_tids() */
3078 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3082 for( i = 0; i < wait->num; i++)
3083 mono_threads_close_thread_handle (wait->handles [i]);
3085 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3088 if (ret < wait->num) {
3089 MonoInternalThread *internal;
3091 internal = wait->threads [ret];
3093 mono_threads_lock ();
3094 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3095 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3096 mono_threads_unlock ();
3100 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3102 struct wait_data *wait=(struct wait_data *)user;
3104 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3105 MonoInternalThread *thread=(MonoInternalThread *)value;
3107 /* Ignore background threads, we abort them later */
3108 /* Do not lock here since it is not needed and the caller holds threads_lock */
3109 if (thread->state & ThreadState_Background) {
3110 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3111 return; /* just leave, ignore */
3114 if (mono_gc_is_finalizer_internal_thread (thread)) {
3115 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3119 if (thread == mono_thread_internal_current ()) {
3120 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3124 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3125 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3129 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3130 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3134 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3135 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3136 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3137 wait->threads[wait->num]=thread;
3140 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3142 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3147 /* Just ignore the rest, we can't do anything with
3154 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3156 struct wait_data *wait=(struct wait_data *)user;
3157 MonoNativeThreadId self = mono_native_thread_id_get ();
3158 MonoInternalThread *thread = (MonoInternalThread *)value;
3160 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3163 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3165 if (mono_gc_is_finalizer_internal_thread (thread))
3168 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3169 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3170 wait->threads[wait->num] = thread;
3173 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3174 mono_thread_internal_abort (thread);
3181 * mono_threads_set_shutting_down:
3183 * Is called by a thread that wants to shut down Mono. If the runtime is already
3184 * shutting down, the calling thread is suspended/stopped, and this function never
3188 mono_threads_set_shutting_down (void)
3190 MonoInternalThread *current_thread = mono_thread_internal_current ();
3192 mono_threads_lock ();
3194 if (shutting_down) {
3195 mono_threads_unlock ();
3197 /* Make sure we're properly suspended/stopped */
3199 LOCK_THREAD (current_thread);
3201 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3202 UNLOCK_THREAD (current_thread);
3203 mono_thread_execute_interruption ();
3205 UNLOCK_THREAD (current_thread);
3208 /*since we're killing the thread, detach it.*/
3209 mono_thread_detach_internal (current_thread);
3211 /* Wake up other threads potentially waiting for us */
3212 mono_thread_info_exit (0);
3214 shutting_down = TRUE;
3216 /* Not really a background state change, but this will
3217 * interrupt the main thread if it is waiting for all
3218 * the other threads.
3220 mono_os_event_set (&background_change_event);
3222 mono_threads_unlock ();
3226 void mono_thread_manage (void)
3228 struct wait_data wait_data;
3229 struct wait_data *wait = &wait_data;
3231 memset (wait, 0, sizeof (struct wait_data));
3232 /* join each thread that's still running */
3233 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3235 mono_threads_lock ();
3237 THREAD_DEBUG (g_message("%s: No threads", __func__));
3238 mono_threads_unlock ();
3241 mono_threads_unlock ();
3244 mono_threads_lock ();
3245 if (shutting_down) {
3246 /* somebody else is shutting down */
3247 mono_threads_unlock ();
3250 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3251 mono_g_hash_table_foreach (threads, print_tids, NULL));
3253 mono_os_event_reset (&background_change_event);
3255 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3256 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3257 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3258 mono_threads_unlock ();
3260 /* Something to wait for */
3261 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3262 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3263 } while(wait->num>0);
3265 /* Mono is shutting down, so just wait for the end */
3266 if (!mono_runtime_try_shutdown ()) {
3267 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3268 mono_thread_suspend (mono_thread_internal_current ());
3269 mono_thread_execute_interruption ();
3273 * Remove everything but the finalizer thread and self.
3274 * Also abort all the background threads
3277 mono_threads_lock ();
3280 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3281 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3282 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3284 mono_threads_unlock ();
3286 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3287 if (wait->num > 0) {
3288 /* Something to wait for */
3289 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3291 } while (wait->num > 0);
3294 * give the subthreads a chance to really quit (this is mainly needed
3295 * to get correct user and system times from getrusage/wait/time(1)).
3296 * This could be removed if we avoid pthread_detach() and use pthread_join().
3298 mono_thread_info_yield ();
3302 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3304 MonoInternalThread *thread = (MonoInternalThread*)value;
3305 struct wait_data *wait = (struct wait_data*)user_data;
3308 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3310 * This needs no locking.
3312 if ((thread->state & ThreadState_Suspended) != 0 ||
3313 (thread->state & ThreadState_Stopped) != 0)
3316 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3317 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3318 wait->threads [wait->num] = thread;
3324 * mono_thread_suspend_all_other_threads:
3326 * Suspend all managed threads except the finalizer thread and this thread. It is
3327 * not possible to resume them later.
3329 void mono_thread_suspend_all_other_threads (void)
3331 struct wait_data wait_data;
3332 struct wait_data *wait = &wait_data;
3334 MonoNativeThreadId self = mono_native_thread_id_get ();
3335 guint32 eventidx = 0;
3336 gboolean starting, finished;
3338 memset (wait, 0, sizeof (struct wait_data));
3340 * The other threads could be in an arbitrary state at this point, i.e.
3341 * they could be starting up, shutting down etc. This means that there could be
3342 * threads which are not even in the threads hash table yet.
3346 * First we set a barrier which will be checked by all threads before they
3347 * are added to the threads hash table, and they will exit if the flag is set.
3348 * This ensures that no threads could be added to the hash later.
3349 * We will use shutting_down as the barrier for now.
3351 g_assert (shutting_down);
3354 * We make multiple calls to WaitForMultipleObjects since:
3355 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3356 * - some threads could exit without becoming suspended
3361 * Make a copy of the hashtable since we can't do anything with
3362 * threads while threads_mutex is held.
3365 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3366 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3367 mono_threads_lock ();
3368 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3369 mono_threads_unlock ();
3372 /* Get the suspended events that we'll be waiting for */
3373 for (i = 0; i < wait->num; ++i) {
3374 MonoInternalThread *thread = wait->threads [i];
3376 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3377 || mono_gc_is_finalizer_internal_thread (thread)
3378 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3380 mono_threads_close_thread_handle (wait->handles [i]);
3381 wait->threads [i] = NULL;
3385 LOCK_THREAD (thread);
3387 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3388 UNLOCK_THREAD (thread);
3389 mono_threads_close_thread_handle (wait->handles [i]);
3390 wait->threads [i] = NULL;
3396 /* Convert abort requests into suspend requests */
3397 if ((thread->state & ThreadState_AbortRequested) != 0)
3398 thread->state &= ~ThreadState_AbortRequested;
3400 thread->state |= ThreadState_SuspendRequested;
3401 mono_os_event_reset (thread->suspended);
3403 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3404 async_suspend_internal (thread, TRUE);
3406 mono_threads_close_thread_handle (wait->handles [i]);
3407 wait->threads [i] = NULL;
3409 if (eventidx <= 0) {
3411 * If there are threads which are starting up, we wait until they
3412 * are suspended when they try to register in the threads hash.
3413 * This is guaranteed to finish, since the threads which can create new
3414 * threads get suspended after a while.
3415 * FIXME: The finalizer thread can still create new threads.
3417 mono_threads_lock ();
3418 if (threads_starting_up)
3419 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3422 mono_threads_unlock ();
3424 mono_thread_info_sleep (100, NULL);
3432 MonoInternalThread *thread;
3433 MonoStackFrameInfo *frames;
3434 int nframes, max_frames;
3435 int nthreads, max_threads;
3436 MonoInternalThread **threads;
3437 } ThreadDumpUserData;
3439 static gboolean thread_dump_requested;
3441 /* This needs to be async safe */
3443 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3445 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3447 if (ud->nframes < ud->max_frames) {
3448 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3455 /* This needs to be async safe */
3456 static SuspendThreadResult
3457 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3459 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3460 MonoInternalThread *thread = user_data->thread;
3463 /* This no longer works with remote unwinding */
3464 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3465 mono_thread_internal_describe (thread, text);
3466 g_string_append (text, "\n");
3469 if (thread == mono_thread_internal_current ())
3470 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3472 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3474 return MonoResumeThread;
3478 int nthreads, max_threads;
3479 MonoInternalThread **threads;
3480 } CollectThreadsUserData;
3483 collect_thread (gpointer key, gpointer value, gpointer user)
3485 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3486 MonoInternalThread *thread = (MonoInternalThread *)value;
3488 if (ud->nthreads < ud->max_threads)
3489 ud->threads [ud->nthreads ++] = thread;
3493 * Collect running threads into the THREADS array.
3494 * THREADS should be an array allocated on the stack.
3497 collect_threads (MonoInternalThread **thread_array, int max_threads)
3499 CollectThreadsUserData ud;
3501 memset (&ud, 0, sizeof (ud));
3502 /* This array contains refs, but its on the stack, so its ok */
3503 ud.threads = thread_array;
3504 ud.max_threads = max_threads;
3506 mono_threads_lock ();
3507 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3508 mono_threads_unlock ();
3514 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3516 GString* text = g_string_new (0);
3518 GError *error = NULL;
3521 ud->thread = thread;
3524 /* Collect frames for the thread */
3525 if (thread == mono_thread_internal_current ()) {
3526 get_thread_dump (mono_thread_info_current (), ud);
3528 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3532 * Do all the non async-safe work outside of get_thread_dump.
3535 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3537 g_string_append_printf (text, "\n\"%s\"", name);
3540 else if (thread->threadpool_thread) {
3541 g_string_append (text, "\n\"<threadpool thread>\"");
3543 g_string_append (text, "\n\"<unnamed thread>\"");
3546 for (i = 0; i < ud->nframes; ++i) {
3547 MonoStackFrameInfo *frame = &ud->frames [i];
3548 MonoMethod *method = NULL;
3550 if (frame->type == FRAME_TYPE_MANAGED)
3551 method = mono_jit_info_get_method (frame->ji);
3554 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3555 g_string_append_printf (text, " %s\n", location);
3558 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3562 fprintf (stdout, "%s", text->str);
3564 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3565 OutputDebugStringA(text->str);
3568 g_string_free (text, TRUE);
3573 mono_threads_perform_thread_dump (void)
3575 ThreadDumpUserData ud;
3576 MonoInternalThread *thread_array [128];
3577 int tindex, nthreads;
3579 if (!thread_dump_requested)
3582 printf ("Full thread dump:\n");
3584 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3585 nthreads = collect_threads (thread_array, 128);
3587 memset (&ud, 0, sizeof (ud));
3588 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3589 ud.max_frames = 256;
3591 for (tindex = 0; tindex < nthreads; ++tindex)
3592 dump_thread (thread_array [tindex], &ud);
3596 thread_dump_requested = FALSE;
3599 /* Obtain the thread dump of all threads */
3601 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3604 ThreadDumpUserData ud;
3605 MonoInternalThread *thread_array [128];
3606 MonoDomain *domain = mono_domain_get ();
3607 MonoDebugSourceLocation *location;
3608 int tindex, nthreads;
3612 *out_threads = NULL;
3613 *out_stack_frames = NULL;
3615 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3616 nthreads = collect_threads (thread_array, 128);
3618 memset (&ud, 0, sizeof (ud));
3619 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3620 ud.max_frames = 256;
3622 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3625 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3629 for (tindex = 0; tindex < nthreads; ++tindex) {
3630 MonoInternalThread *thread = thread_array [tindex];
3631 MonoArray *thread_frames;
3637 /* Collect frames for the thread */
3638 if (thread == mono_thread_internal_current ()) {
3639 get_thread_dump (mono_thread_info_current (), &ud);
3641 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3644 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3646 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3649 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3651 for (i = 0; i < ud.nframes; ++i) {
3652 MonoStackFrameInfo *frame = &ud.frames [i];
3653 MonoMethod *method = NULL;
3654 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3658 sf->native_offset = frame->native_offset;
3660 if (frame->type == FRAME_TYPE_MANAGED)
3661 method = mono_jit_info_get_method (frame->ji);
3664 sf->method_address = (gsize) frame->ji->code_start;
3666 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3669 MONO_OBJECT_SETREF (sf, method, rm);
3671 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3673 sf->il_offset = location->il_offset;
3675 if (location && location->source_file) {
3676 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3677 sf->line = location->row;
3678 sf->column = location->column;
3680 mono_debug_free_source_location (location);
3685 mono_array_setref (thread_frames, i, sf);
3691 return is_ok (error);
3695 * mono_threads_request_thread_dump:
3697 * Ask all threads except the current to print their stacktrace to stdout.
3700 mono_threads_request_thread_dump (void)
3702 /*The new thread dump code runs out of the finalizer thread. */
3703 thread_dump_requested = TRUE;
3704 mono_gc_finalize_notify ();
3709 gint allocated; /* +1 so that refs [allocated] == NULL */
3713 typedef struct ref_stack RefStack;
3716 ref_stack_new (gint initial_size)
3720 initial_size = MAX (initial_size, 16) + 1;
3721 rs = g_new0 (RefStack, 1);
3722 rs->refs = g_new0 (gpointer, initial_size);
3723 rs->allocated = initial_size;
3728 ref_stack_destroy (gpointer ptr)
3730 RefStack *rs = (RefStack *)ptr;
3739 ref_stack_push (RefStack *rs, gpointer ptr)
3741 g_assert (rs != NULL);
3743 if (rs->bottom >= rs->allocated) {
3744 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3745 rs->allocated <<= 1;
3746 rs->refs [rs->allocated] = NULL;
3748 rs->refs [rs->bottom++] = ptr;
3752 ref_stack_pop (RefStack *rs)
3754 if (rs == NULL || rs->bottom == 0)
3758 rs->refs [rs->bottom] = NULL;
3762 ref_stack_find (RefStack *rs, gpointer ptr)
3769 for (refs = rs->refs; refs && *refs; refs++) {
3777 * mono_thread_push_appdomain_ref:
3779 * Register that the current thread may have references to objects in domain
3780 * @domain on its stack. Each call to this function should be paired with a
3781 * call to pop_appdomain_ref.
3784 mono_thread_push_appdomain_ref (MonoDomain *domain)
3786 MonoInternalThread *thread = mono_thread_internal_current ();
3789 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3790 SPIN_LOCK (thread->lock_thread_id);
3791 if (thread->appdomain_refs == NULL)
3792 thread->appdomain_refs = ref_stack_new (16);
3793 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3794 SPIN_UNLOCK (thread->lock_thread_id);
3799 mono_thread_pop_appdomain_ref (void)
3801 MonoInternalThread *thread = mono_thread_internal_current ();
3804 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3805 SPIN_LOCK (thread->lock_thread_id);
3806 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3807 SPIN_UNLOCK (thread->lock_thread_id);
3812 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3815 SPIN_LOCK (thread->lock_thread_id);
3816 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3817 SPIN_UNLOCK (thread->lock_thread_id);
3822 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3824 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3827 typedef struct abort_appdomain_data {
3828 struct wait_data wait;
3830 } abort_appdomain_data;
3833 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3835 MonoInternalThread *thread = (MonoInternalThread*)value;
3836 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3837 MonoDomain *domain = data->domain;
3839 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3840 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3842 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3843 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3844 data->wait.threads [data->wait.num] = thread;
3847 /* Just ignore the rest, we can't do anything with
3855 * mono_threads_abort_appdomain_threads:
3857 * Abort threads which has references to the given appdomain.
3860 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3862 #ifdef __native_client__
3866 abort_appdomain_data user_data;
3868 int orig_timeout = timeout;
3871 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3873 start_time = mono_msec_ticks ();
3875 mono_threads_lock ();
3877 user_data.domain = domain;
3878 user_data.wait.num = 0;
3879 /* This shouldn't take any locks */
3880 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3881 mono_threads_unlock ();
3883 if (user_data.wait.num > 0) {
3884 /* Abort the threads outside the threads lock */
3885 for (i = 0; i < user_data.wait.num; ++i)
3886 mono_thread_internal_abort (user_data.wait.threads [i]);
3889 * We should wait for the threads either to abort, or to leave the
3890 * domain. We can't do the latter, so we wait with a timeout.
3892 wait_for_tids (&user_data.wait, 100, FALSE);
3895 /* Update remaining time */
3896 timeout -= mono_msec_ticks () - start_time;
3897 start_time = mono_msec_ticks ();
3899 if (orig_timeout != -1 && timeout < 0)
3902 while (user_data.wait.num > 0);
3904 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3910 * mono_thread_get_undeniable_exception:
3912 * Return an exception which needs to be raised when leaving a catch clause.
3913 * This is used for undeniable exception propagation.
3916 mono_thread_get_undeniable_exception (void)
3918 MonoInternalThread *thread = mono_thread_internal_current ();
3920 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3923 // We don't want to have our exception effect calls made by
3924 // the catching block
3926 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3930 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3931 * exception if the thread no longer references a dying appdomain.
3933 thread->abort_exc->trace_ips = NULL;
3934 thread->abort_exc->stack_trace = NULL;
3935 return thread->abort_exc;
3938 #if MONO_SMALL_CONFIG
3939 #define NUM_STATIC_DATA_IDX 4
3940 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3944 #define NUM_STATIC_DATA_IDX 8
3945 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3946 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3950 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3951 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3954 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3956 gpointer *static_data = (gpointer *)addr;
3958 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3959 void **ptr = (void **)static_data [i];
3964 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3965 void **p = ptr + idx;
3968 mark_func ((MonoObject**)p, gc_data);
3974 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3976 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3980 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3982 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3986 * mono_alloc_static_data
3988 * Allocate memory blocks for storing threads or context static data
3991 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3993 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
3996 gpointer* static_data = *static_data_ptr;
3998 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
3999 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4001 if (mono_gc_user_markers_supported ()) {
4002 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4003 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4005 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4006 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4009 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4010 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4011 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4012 *static_data_ptr = static_data;
4013 static_data [0] = static_data;
4016 for (i = 1; i <= idx; ++i) {
4017 if (static_data [i])
4020 if (mono_gc_user_markers_supported ())
4021 static_data [i] = g_malloc0 (static_data_size [i]);
4023 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4024 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4025 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4030 mono_free_static_data (gpointer* static_data)
4033 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4034 gpointer p = static_data [i];
4038 * At this point, the static data pointer array is still registered with the
4039 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4040 * data. Freeing the individual arrays without first nulling their slots
4041 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4042 * such an already freed array. See bug #13813.
4044 static_data [i] = NULL;
4045 mono_memory_write_barrier ();
4046 if (mono_gc_user_markers_supported ())
4049 mono_gc_free_fixed (p);
4051 mono_gc_free_fixed (static_data);
4055 * mono_init_static_data_info
4057 * Initializes static data counters
4059 static void mono_init_static_data_info (StaticDataInfo *static_data)
4061 static_data->idx = 0;
4062 static_data->offset = 0;
4063 static_data->freelist = NULL;
4067 * mono_alloc_static_data_slot
4069 * Generates an offset for static data. static_data contains the counters
4070 * used to generate it.
4073 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4075 if (!static_data->idx && !static_data->offset) {
4077 * we use the first chunk of the first allocation also as
4078 * an array for the rest of the data
4080 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4082 static_data->offset += align - 1;
4083 static_data->offset &= ~(align - 1);
4084 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4085 static_data->idx ++;
4086 g_assert (size <= static_data_size [static_data->idx]);
4087 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4088 static_data->offset = 0;
4090 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4091 static_data->offset += size;
4096 * LOCKING: requires that threads_mutex is held
4099 context_adjust_static_data (MonoAppContext *ctx)
4101 if (context_static_info.offset || context_static_info.idx > 0) {
4102 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4103 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4104 ctx->data->static_data = ctx->static_data;
4109 * LOCKING: requires that threads_mutex is held
4112 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4114 MonoInternalThread *thread = (MonoInternalThread *)value;
4115 guint32 offset = GPOINTER_TO_UINT (user);
4117 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4121 * LOCKING: requires that threads_mutex is held
4124 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4126 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4131 guint32 offset = GPOINTER_TO_UINT (user);
4132 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4133 ctx->data->static_data = ctx->static_data;
4136 static StaticDataFreeList*
4137 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4139 StaticDataFreeList* prev = NULL;
4140 StaticDataFreeList* tmp = static_data->freelist;
4142 if (tmp->size == size) {
4144 prev->next = tmp->next;
4146 static_data->freelist = tmp->next;
4155 #if SIZEOF_VOID_P == 4
4162 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4164 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4166 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4167 MonoBitSet *rb = sets [idx];
4168 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4169 offset /= sizeof (uintptr_t);
4170 /* offset is now the bitmap offset */
4171 for (int i = 0; i < numbits; ++i) {
4172 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4173 mono_bitset_set_fast (rb, offset + i);
4178 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4180 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4181 MonoBitSet *rb = sets [idx];
4182 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4183 offset /= sizeof (uintptr_t);
4184 /* offset is now the bitmap offset */
4185 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4186 mono_bitset_clear_fast (rb, offset + i);
4190 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4192 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4194 StaticDataInfo *info;
4197 if (static_type == SPECIAL_STATIC_THREAD) {
4198 info = &thread_static_info;
4199 sets = thread_reference_bitmaps;
4201 info = &context_static_info;
4202 sets = context_reference_bitmaps;
4205 mono_threads_lock ();
4207 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4211 offset = item->offset;
4214 offset = mono_alloc_static_data_slot (info, size, align);
4217 update_reference_bitmap (sets, offset, bitmap, numbits);
4219 if (static_type == SPECIAL_STATIC_THREAD) {
4220 /* This can be called during startup */
4221 if (threads != NULL)
4222 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4224 if (contexts != NULL)
4225 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4227 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4230 mono_threads_unlock ();
4236 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4238 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4240 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4241 return get_thread_static_data (thread, offset);
4243 return get_context_static_data (thread->current_appcontext, offset);
4248 mono_get_special_static_data (guint32 offset)
4250 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4259 * LOCKING: requires that threads_mutex is held
4262 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4264 MonoInternalThread *thread = (MonoInternalThread *)value;
4265 OffsetSize *data = (OffsetSize *)user;
4266 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4267 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4270 if (!thread->static_data || !thread->static_data [idx])
4272 ptr = ((char*) thread->static_data [idx]) + off;
4273 mono_gc_bzero_atomic (ptr, data->size);
4277 * LOCKING: requires that threads_mutex is held
4280 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4282 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4287 OffsetSize *data = (OffsetSize *)user;
4288 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4289 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4292 if (!ctx->static_data || !ctx->static_data [idx])
4295 ptr = ((char*) ctx->static_data [idx]) + off;
4296 mono_gc_bzero_atomic (ptr, data->size);
4300 do_free_special_slot (guint32 offset, guint32 size)
4302 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4304 StaticDataInfo *info;
4306 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4307 info = &thread_static_info;
4308 sets = thread_reference_bitmaps;
4310 info = &context_static_info;
4311 sets = context_reference_bitmaps;
4314 guint32 data_offset = offset;
4315 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4316 OffsetSize data = { data_offset, size };
4318 clear_reference_bitmap (sets, data.offset, data.size);
4320 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4321 if (threads != NULL)
4322 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4324 if (contexts != NULL)
4325 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4328 if (!mono_runtime_is_shutting_down ()) {
4329 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4331 item->offset = offset;
4334 item->next = info->freelist;
4335 info->freelist = item;
4340 do_free_special (gpointer key, gpointer value, gpointer data)
4342 MonoClassField *field = (MonoClassField *)key;
4343 guint32 offset = GPOINTER_TO_UINT (value);
4346 size = mono_type_size (field->type, &align);
4347 do_free_special_slot (offset, size);
4351 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4353 mono_threads_lock ();
4355 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4357 mono_threads_unlock ();
4361 static void CALLBACK dummy_apc (ULONG_PTR param)
4367 * mono_thread_execute_interruption
4369 * Performs the operation that the requested thread state requires (abort,
4372 static MonoException*
4373 mono_thread_execute_interruption (void)
4375 MonoInternalThread *thread = mono_thread_internal_current ();
4376 MonoThread *sys_thread = mono_thread_current ();
4378 LOCK_THREAD (thread);
4380 /* MonoThread::interruption_requested can only be changed with atomics */
4381 if (mono_thread_clear_interruption_requested (thread)) {
4382 /* this will consume pending APC calls */
4384 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4386 /* Clear the interrupted flag of the thread so it can wait again */
4387 mono_thread_info_clear_self_interrupt ();
4390 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4391 if (sys_thread->pending_exception) {
4394 exc = sys_thread->pending_exception;
4395 sys_thread->pending_exception = NULL;
4397 UNLOCK_THREAD (thread);
4399 } else if (thread->state & (ThreadState_AbortRequested)) {
4400 UNLOCK_THREAD (thread);
4401 g_assert (sys_thread->pending_exception == NULL);
4402 if (thread->abort_exc == NULL) {
4404 * This might be racy, but it has to be called outside the lock
4405 * since it calls managed code.
4407 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4409 return thread->abort_exc;
4410 } else if (thread->state & (ThreadState_SuspendRequested)) {
4411 /* calls UNLOCK_THREAD (thread) */
4412 self_suspend_internal ();
4414 } else if (thread->thread_interrupt_requested) {
4416 thread->thread_interrupt_requested = FALSE;
4417 UNLOCK_THREAD (thread);
4419 return(mono_get_exception_thread_interrupted ());
4422 UNLOCK_THREAD (thread);
4428 * mono_thread_request_interruption
4430 * A signal handler can call this method to request the interruption of a
4431 * thread. The result of the interruption will depend on the current state of
4432 * the thread. If the result is an exception that needs to be throw, it is
4433 * provided as return value.
4436 mono_thread_request_interruption (gboolean running_managed)
4438 MonoInternalThread *thread = mono_thread_internal_current ();
4440 /* The thread may already be stopping */
4444 if (!mono_thread_set_interruption_requested (thread))
4447 if (!running_managed || is_running_protected_wrapper ()) {
4448 /* Can't stop while in unmanaged code. Increase the global interruption
4449 request count. When exiting the unmanaged method the count will be
4450 checked and the thread will be interrupted. */
4452 /* this will awake the thread if it is in WaitForSingleObject
4454 /* Our implementation of this function ignores the func argument */
4456 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4458 mono_thread_info_self_interrupt ();
4463 return mono_thread_execute_interruption ();
4467 /*This function should be called by a thread after it has exited all of
4468 * its handle blocks at interruption time.*/
4470 mono_thread_resume_interruption (gboolean exec)
4472 MonoInternalThread *thread = mono_thread_internal_current ();
4473 gboolean still_aborting;
4475 /* The thread may already be stopping */
4479 LOCK_THREAD (thread);
4480 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4481 UNLOCK_THREAD (thread);
4483 /*This can happen if the protected block called Thread::ResetAbort*/
4484 if (!still_aborting)
4487 if (!mono_thread_set_interruption_requested (thread))
4490 mono_thread_info_self_interrupt ();
4493 return mono_thread_execute_interruption ();
4498 gboolean mono_thread_interruption_requested ()
4500 if (thread_interruption_requested) {
4501 MonoInternalThread *thread = mono_thread_internal_current ();
4502 /* The thread may already be stopping */
4504 return mono_thread_get_interruption_requested (thread);
4509 static MonoException*
4510 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4512 MonoInternalThread *thread = mono_thread_internal_current ();
4514 /* The thread may already be stopping */
4517 if (!mono_thread_get_interruption_requested (thread))
4519 if (!bypass_abort_protection && is_running_protected_wrapper ())
4522 return mono_thread_execute_interruption ();
4526 * Performs the interruption of the current thread, if one has been requested,
4527 * and the thread is not running a protected wrapper.
4528 * Return the exception which needs to be thrown, if any.
4531 mono_thread_interruption_checkpoint (void)
4533 return mono_thread_interruption_checkpoint_request (FALSE);
4537 * Performs the interruption of the current thread, if one has been requested.
4538 * Return the exception which needs to be thrown, if any.
4541 mono_thread_force_interruption_checkpoint_noraise (void)
4543 return mono_thread_interruption_checkpoint_request (TRUE);
4547 * mono_set_pending_exception:
4549 * Set the pending exception of the current thread to EXC.
4550 * The exception will be thrown when execution returns to managed code.
4553 mono_set_pending_exception (MonoException *exc)
4555 MonoThread *thread = mono_thread_current ();
4557 /* The thread may already be stopping */
4561 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4563 mono_thread_request_interruption (FALSE);
4567 * mono_thread_interruption_request_flag:
4569 * Returns the address of a flag that will be non-zero if an interruption has
4570 * been requested for a thread. The thread to interrupt may not be the current
4571 * thread, so an additional call to mono_thread_interruption_requested() or
4572 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4575 gint32* mono_thread_interruption_request_flag ()
4577 return &thread_interruption_requested;
4581 mono_thread_init_apartment_state (void)
4584 MonoInternalThread* thread = mono_thread_internal_current ();
4586 /* Positive return value indicates success, either
4587 * S_OK if this is first CoInitialize call, or
4588 * S_FALSE if CoInitialize already called, but with same
4589 * threading model. A negative value indicates failure,
4590 * probably due to trying to change the threading model.
4592 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4593 ? COINIT_APARTMENTTHREADED
4594 : COINIT_MULTITHREADED) < 0) {
4595 thread->apartment_state = ThreadApartmentState_Unknown;
4601 mono_thread_cleanup_apartment_state (void)
4604 MonoInternalThread* thread = mono_thread_internal_current ();
4606 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4613 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4615 LOCK_THREAD (thread);
4616 thread->state |= state;
4617 UNLOCK_THREAD (thread);
4621 * mono_thread_test_and_set_state:
4622 * Test if current state of \p thread include \p test. If it does not, OR \p set into the state.
4623 * \returns TRUE if \p set was OR'd in.
4626 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4628 LOCK_THREAD (thread);
4630 if ((thread->state & test) != 0) {
4631 UNLOCK_THREAD (thread);
4635 thread->state |= set;
4636 UNLOCK_THREAD (thread);
4642 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4644 LOCK_THREAD (thread);
4645 thread->state &= ~state;
4646 UNLOCK_THREAD (thread);
4650 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4652 gboolean ret = FALSE;
4654 LOCK_THREAD (thread);
4656 if ((thread->state & test) != 0) {
4660 UNLOCK_THREAD (thread);
4666 self_interrupt_thread (void *_unused)
4669 MonoThreadInfo *info;
4671 exc = mono_thread_execute_interruption ();
4673 if (mono_threads_is_coop_enabled ()) {
4674 /* We can return from an async call in coop, as
4675 * it's simply called when exiting the safepoint */
4679 g_error ("%s: we can't resume from an async call", __func__);
4682 info = mono_thread_info_current ();
4684 /* We must use _with_context since we didn't trampoline into the runtime */
4685 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. */
4689 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4693 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4697 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4699 MonoJitInfo **dest = (MonoJitInfo **)data;
4705 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4707 MonoJitInfo *ji = NULL;
4712 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4713 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4714 * where we hold runtime locks.
4716 if (!mono_threads_is_coop_enabled ())
4717 mono_thread_info_set_is_async_context (TRUE);
4718 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4719 if (!mono_threads_is_coop_enabled ())
4720 mono_thread_info_set_is_async_context (FALSE);
4725 MonoInternalThread *thread;
4726 gboolean install_async_abort;
4727 MonoThreadInfoInterruptToken *interrupt_token;
4730 static SuspendThreadResult
4731 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4733 AbortThreadData *data = (AbortThreadData *)ud;
4734 MonoInternalThread *thread = data->thread;
4735 MonoJitInfo *ji = NULL;
4736 gboolean protected_wrapper;
4737 gboolean running_managed;
4739 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4740 return MonoResumeThread;
4742 /*someone is already interrupting it*/
4743 if (!mono_thread_set_interruption_requested (thread))
4744 return MonoResumeThread;
4746 ji = mono_thread_info_get_last_managed (info);
4747 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4748 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4750 if (!protected_wrapper && running_managed) {
4751 /*We are in managed code*/
4752 /*Set the thread to call */
4753 if (data->install_async_abort)
4754 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4755 return MonoResumeThread;
4758 * This will cause waits to be broken.
4759 * It will also prevent the thread from entering a wait, so if the thread returns
4760 * from the wait before it receives the abort signal, it will just spin in the wait
4761 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4764 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4766 return MonoResumeThread;
4771 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4773 AbortThreadData data;
4775 g_assert (thread != mono_thread_internal_current ());
4777 data.thread = thread;
4778 data.install_async_abort = install_async_abort;
4779 data.interrupt_token = NULL;
4781 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4782 if (data.interrupt_token)
4783 mono_thread_info_finish_interrupt (data.interrupt_token);
4784 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4788 self_abort_internal (MonoError *error)
4794 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4795 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4798 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.
4800 exc = mono_thread_request_interruption (TRUE);
4802 mono_error_set_exception_instance (error, exc);
4804 mono_thread_info_self_interrupt ();
4808 MonoInternalThread *thread;
4810 MonoThreadInfoInterruptToken *interrupt_token;
4811 } SuspendThreadData;
4813 static SuspendThreadResult
4814 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4816 SuspendThreadData *data = (SuspendThreadData *)ud;
4817 MonoInternalThread *thread = data->thread;
4818 MonoJitInfo *ji = NULL;
4819 gboolean protected_wrapper;
4820 gboolean running_managed;
4822 ji = mono_thread_info_get_last_managed (info);
4823 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4824 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4826 if (running_managed && !protected_wrapper) {
4827 if (mono_threads_is_coop_enabled ()) {
4828 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4829 return MonoResumeThread;
4831 thread->state &= ~ThreadState_SuspendRequested;
4832 thread->state |= ThreadState_Suspended;
4833 return KeepSuspended;
4836 mono_thread_set_interruption_requested (thread);
4837 if (data->interrupt)
4838 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4840 return MonoResumeThread;
4844 /* LOCKING: called with @thread synch_cs held, and releases it */
4846 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4848 SuspendThreadData data;
4850 g_assert (thread != mono_thread_internal_current ());
4852 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4854 thread->self_suspended = FALSE;
4856 data.thread = thread;
4857 data.interrupt = interrupt;
4858 data.interrupt_token = NULL;
4860 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4861 if (data.interrupt_token)
4862 mono_thread_info_finish_interrupt (data.interrupt_token);
4864 UNLOCK_THREAD (thread);
4867 /* LOCKING: called with @thread synch_cs held, and releases it */
4869 self_suspend_internal (void)
4871 MonoInternalThread *thread;
4873 MonoOSEventWaitRet res;
4875 thread = mono_thread_internal_current ();
4877 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4879 thread->self_suspended = TRUE;
4881 thread->state &= ~ThreadState_SuspendRequested;
4882 thread->state |= ThreadState_Suspended;
4884 UNLOCK_THREAD (thread);
4886 event = thread->suspended;
4889 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4890 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4895 suspend_for_shutdown_async_call (gpointer unused)
4898 mono_thread_info_yield ();
4901 static SuspendThreadResult
4902 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4904 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4905 return MonoResumeThread;
4909 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4911 g_assert (thread != mono_thread_internal_current ());
4913 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4917 * mono_thread_is_foreign:
4918 * @thread: the thread to query
4920 * This function allows one to determine if a thread was created by the mono runtime and has
4921 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4923 * Returns: TRUE if @thread was not created by the runtime.
4926 mono_thread_is_foreign (MonoThread *thread)
4928 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4929 return info->runtime_thread == FALSE;
4933 * mono_add_joinable_thread:
4935 * Add TID to the list of joinable threads.
4936 * LOCKING: Acquires the threads lock.
4939 mono_threads_add_joinable_thread (gpointer tid)
4943 * We cannot detach from threads because it causes problems like
4944 * 2fd16f60/r114307. So we collect them and join them when
4945 * we have time (in he finalizer thread).
4947 joinable_threads_lock ();
4948 if (!joinable_threads)
4949 joinable_threads = g_hash_table_new (NULL, NULL);
4950 g_hash_table_insert (joinable_threads, tid, tid);
4951 joinable_thread_count ++;
4952 joinable_threads_unlock ();
4954 mono_gc_finalize_notify ();
4959 * mono_threads_join_threads:
4961 * Join all joinable threads. This is called from the finalizer thread.
4962 * LOCKING: Acquires the threads lock.
4965 mono_threads_join_threads (void)
4968 GHashTableIter iter;
4975 if (!joinable_thread_count)
4979 joinable_threads_lock ();
4981 if (g_hash_table_size (joinable_threads)) {
4982 g_hash_table_iter_init (&iter, joinable_threads);
4983 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4984 thread = (pthread_t)tid;
4985 g_hash_table_remove (joinable_threads, key);
4986 joinable_thread_count --;
4989 joinable_threads_unlock ();
4991 if (thread != pthread_self ()) {
4993 /* This shouldn't block */
4994 mono_threads_join_lock ();
4995 mono_native_thread_join (thread);
4996 mono_threads_join_unlock ();
5009 * Wait for thread TID to exit.
5010 * LOCKING: Acquires the threads lock.
5013 mono_thread_join (gpointer tid)
5017 gboolean found = FALSE;
5019 joinable_threads_lock ();
5020 if (!joinable_threads)
5021 joinable_threads = g_hash_table_new (NULL, NULL);
5022 if (g_hash_table_lookup (joinable_threads, tid)) {
5023 g_hash_table_remove (joinable_threads, tid);
5024 joinable_thread_count --;
5027 joinable_threads_unlock ();
5030 thread = (pthread_t)tid;
5032 mono_native_thread_join (thread);
5038 mono_thread_internal_unhandled_exception (MonoObject* exc)
5040 MonoClass *klass = exc->vtable->klass;
5041 if (is_threadabort_exception (klass)) {
5042 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5043 } else if (!is_appdomainunloaded_exception (klass)
5044 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5045 mono_unhandled_exception (exc);
5046 if (mono_environment_exitcode_get () == 1) {
5047 mono_environment_exitcode_set (255);
5048 mono_invoke_unhandled_exception_hook (exc);
5049 g_assert_not_reached ();
5055 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5058 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5059 mono_error_set_pending_exception (&error);
5063 * mono_threads_attach_coop: called by native->managed wrappers
5067 * - @return: the original domain which needs to be restored, or NULL.
5070 * - @dummy: contains the original domain
5071 * - @return: a cookie containing current MonoThreadInfo*.
5074 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5077 gboolean fresh_thread = FALSE;
5080 /* Happens when called from AOTed code which is only used in the root domain. */
5081 domain = mono_get_root_domain ();
5086 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5087 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5088 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5089 * we're only responsible for making the cookie. */
5090 if (mono_threads_is_coop_enabled ()) {
5091 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5092 fresh_thread = !info || !mono_thread_info_is_live (info);
5095 if (!mono_thread_internal_current ()) {
5096 mono_thread_attach_full (domain, FALSE);
5099 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5102 orig = mono_domain_get ();
5104 mono_domain_set (domain, TRUE);
5106 if (!mono_threads_is_coop_enabled ())
5107 return orig != domain ? orig : NULL;
5111 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5112 * return the right cookie. */
5113 return mono_threads_enter_gc_unsafe_region_cookie ();
5116 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5117 return mono_threads_enter_gc_unsafe_region (dummy);
5122 * mono_threads_detach_coop: called by native->managed wrappers
5125 * - @cookie: the original domain which needs to be restored, or NULL.
5129 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5130 * - @dummy: contains the original domain
5133 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5135 MonoDomain *domain, *orig;
5137 if (!mono_threads_is_coop_enabled ()) {
5138 orig = (MonoDomain*) cookie;
5140 mono_domain_set (orig, TRUE);
5142 orig = (MonoDomain*) *dummy;
5144 domain = mono_domain_get ();
5147 /* it won't do anything if cookie is NULL
5148 * thread state RUNNING -> (RUNNING|BLOCKING) */
5149 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5151 if (orig != domain) {
5153 mono_domain_unset ();
5155 mono_domain_set (orig, TRUE);
5161 /* Returns TRUE if the current thread is ready to be interrupted. */
5163 mono_threads_is_ready_to_be_interrupted (void)
5165 MonoInternalThread *thread;
5167 thread = mono_thread_internal_current ();
5168 LOCK_THREAD (thread);
5169 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5170 UNLOCK_THREAD (thread);
5174 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5175 UNLOCK_THREAD (thread);
5179 UNLOCK_THREAD (thread);
5185 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5187 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5189 if (internal->thread_info) {
5190 g_string_append (text, ", state : ");
5191 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5194 if (internal->owned_mutexes) {
5197 g_string_append (text, ", owns : [");
5198 for (i = 0; i < internal->owned_mutexes->len; i++)
5199 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5200 g_string_append (text, "]");
5205 mono_thread_internal_is_current (MonoInternalThread *internal)
5207 g_assert (internal);
5208 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));