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);
1007 * mono_thread_new_init:
1010 mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1012 if (mono_thread_start_cb) {
1013 mono_thread_start_cb (tid, stack_start, func);
1018 * mono_threads_set_default_stacksize:
1021 mono_threads_set_default_stacksize (guint32 stacksize)
1023 default_stacksize = stacksize;
1027 * mono_threads_get_default_stacksize:
1030 mono_threads_get_default_stacksize (void)
1032 return default_stacksize;
1036 * mono_thread_create_internal:
1038 * ARG should not be a GC reference.
1041 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1044 MonoInternalThread *internal;
1049 internal = create_internal_thread_object ();
1051 thread = create_thread_object (domain, internal);
1053 LOCK_THREAD (internal);
1055 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1057 UNLOCK_THREAD (internal);
1059 return_val_if_nok (error, NULL);
1064 * mono_thread_create:
1067 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1070 if (!mono_thread_create_checked (domain, func, arg, &error))
1071 mono_error_cleanup (&error);
1075 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1077 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1081 * mono_thread_attach:
1084 mono_thread_attach (MonoDomain *domain)
1086 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1092 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1094 MonoInternalThread *internal;
1096 MonoThreadInfo *info;
1097 MonoNativeThreadId tid;
1100 if (mono_thread_internal_current_is_attached ()) {
1101 if (domain != mono_domain_get ())
1102 mono_domain_set (domain, TRUE);
1103 /* Already attached */
1104 return mono_thread_current ();
1107 info = mono_thread_info_attach (&stack_ptr);
1110 tid=mono_native_thread_id_get ();
1112 internal = create_internal_thread_object ();
1114 thread = create_thread_object (domain, internal);
1116 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1117 /* Mono is shutting down, so just wait for the end */
1119 mono_thread_info_sleep (10000, NULL);
1122 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1124 if (mono_thread_attach_cb) {
1128 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1131 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1133 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1136 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1137 if (!mono_thread_info_current ()->tools_thread)
1138 // FIXME: Need a separate callback
1139 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1145 mono_thread_detach_internal (MonoInternalThread *thread)
1149 g_assert (thread != NULL);
1151 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1154 mono_w32mutex_abandon ();
1157 if (thread->abort_state_handle) {
1158 mono_gchandle_free (thread->abort_state_handle);
1159 thread->abort_state_handle = 0;
1162 thread->abort_exc = NULL;
1163 thread->current_appcontext = NULL;
1166 * thread->synch_cs can be NULL if this was called after
1167 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1168 * This can happen only during shutdown.
1169 * The shutting_down flag is not always set, so we can't assert on it.
1171 if (thread->synch_cs)
1172 LOCK_THREAD (thread);
1174 thread->state |= ThreadState_Stopped;
1175 thread->state &= ~ThreadState_Background;
1177 if (thread->synch_cs)
1178 UNLOCK_THREAD (thread);
1181 An interruption request has leaked to cleanup. Adjust the global counter.
1183 This can happen is the abort source thread finds the abortee (this) thread
1184 in unmanaged code. If this thread never trips back to managed code or check
1185 the local flag it will be left set and positively unbalance the global counter.
1187 Leaving the counter unbalanced will cause a performance degradation since all threads
1188 will now keep checking their local flags all the time.
1190 mono_thread_clear_interruption_requested (thread);
1192 mono_threads_lock ();
1196 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1197 /* We have to check whether the thread object for the
1198 * tid is still the same in the table because the
1199 * thread might have been destroyed and the tid reused
1200 * in the meantime, in which case the tid would be in
1201 * the table, but with another thread object.
1205 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1209 mono_threads_unlock ();
1211 /* Don't close the handle here, wait for the object finalizer
1212 * to do it. Otherwise, the following race condition applies:
1214 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1216 * 2) Some other handle is reassigned the same slot
1218 * 3) Another thread tries to join the first thread, and
1219 * blocks waiting for the reassigned handle to be signalled
1220 * (which might never happen). This is possible, because the
1221 * thread calling Join() still has a reference to the first
1225 /* if the thread is not in the hash it has been removed already */
1227 mono_domain_unset ();
1228 mono_memory_barrier ();
1230 if (mono_thread_cleanup_fn)
1231 mono_thread_cleanup_fn (thread_get_tid (thread));
1236 mono_release_type_locks (thread);
1238 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1239 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1240 mono_profiler_thread_end (thread->tid);
1242 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1245 * This will signal async signal handlers that the thread has exited.
1246 * The profiler callback needs this to be set, so it cannot be done earlier.
1248 mono_domain_unset ();
1249 mono_memory_barrier ();
1251 if (thread == mono_thread_internal_current ())
1252 mono_thread_pop_appdomain_ref ();
1254 mono_free_static_data (thread->static_data);
1255 thread->static_data = NULL;
1256 ref_stack_destroy (thread->appdomain_refs);
1257 thread->appdomain_refs = NULL;
1259 g_assert (thread->suspended);
1260 mono_os_event_destroy (thread->suspended);
1261 g_free (thread->suspended);
1262 thread->suspended = NULL;
1264 if (mono_thread_cleanup_fn)
1265 mono_thread_cleanup_fn (thread_get_tid (thread));
1267 mono_memory_barrier ();
1269 if (mono_gc_is_moving ()) {
1270 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1271 thread->thread_pinning_ref = NULL;
1275 SET_CURRENT_OBJECT (NULL);
1276 mono_domain_unset ();
1278 /* Don't need to close the handle to this thread, even though we took a
1279 * reference in mono_thread_attach (), because the GC will do it
1280 * when the Thread object is finalised.
1285 * mono_thread_detach:
1288 mono_thread_detach (MonoThread *thread)
1291 mono_thread_detach_internal (thread->internal_thread);
1295 * mono_thread_detach_if_exiting:
1297 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1298 * This should be used at the end of embedding code which calls into managed code, and which
1299 * can be called from pthread dtors, like <code>dealloc:</code> implementations in Objective-C.
1302 mono_thread_detach_if_exiting (void)
1304 if (mono_thread_info_is_exiting ()) {
1305 MonoInternalThread *thread;
1307 thread = mono_thread_internal_current ();
1309 mono_thread_detach_internal (thread);
1310 mono_thread_info_detach ();
1318 mono_thread_internal_current_is_attached (void)
1320 MonoInternalThread *internal;
1322 internal = GET_CURRENT_OBJECT ();
1333 mono_thread_exit (void)
1335 MonoInternalThread *thread = mono_thread_internal_current ();
1337 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1339 mono_thread_detach_internal (thread);
1341 /* we could add a callback here for embedders to use. */
1342 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1343 exit (mono_environment_exitcode_get ());
1345 mono_thread_info_exit (0);
1349 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1351 MonoInternalThread *internal;
1353 internal = create_internal_thread_object ();
1355 internal->state = ThreadState_Unstarted;
1357 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1361 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1363 return mono_thread_current ();
1367 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1371 MonoInternalThread *internal;
1374 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1376 if (!this_obj->internal_thread)
1377 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1378 internal = this_obj->internal_thread;
1380 LOCK_THREAD (internal);
1382 if ((internal->state & ThreadState_Unstarted) == 0) {
1383 UNLOCK_THREAD (internal);
1384 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1388 if ((internal->state & ThreadState_Aborted) != 0) {
1389 UNLOCK_THREAD (internal);
1393 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1395 mono_error_cleanup (&error);
1396 UNLOCK_THREAD (internal);
1400 internal->state &= ~ThreadState_Unstarted;
1402 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1404 UNLOCK_THREAD (internal);
1405 return internal->handle;
1409 * This is called from the finalizer of the internal thread object.
1412 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1414 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1417 * Since threads keep a reference to their thread object while running, by
1418 * the time this function is called, the thread has already exited/detached,
1419 * i.e. mono_thread_detach_internal () has ran. The exception is during
1420 * shutdown, when mono_thread_detach_internal () can be called after this.
1422 if (this_obj->handle) {
1423 mono_threads_close_thread_handle (this_obj->handle);
1424 this_obj->handle = NULL;
1428 CloseHandle (this_obj->native_handle);
1431 if (this_obj->synch_cs) {
1432 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1433 this_obj->synch_cs = NULL;
1434 mono_coop_mutex_destroy (synch_cs);
1438 if (this_obj->name) {
1439 void *name = this_obj->name;
1440 this_obj->name = NULL;
1446 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1449 MonoInternalThread *thread = mono_thread_internal_current ();
1451 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1453 if (mono_thread_current_check_pending_interrupt ())
1457 gboolean alerted = FALSE;
1459 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1461 res = mono_thread_info_sleep (ms, &alerted);
1463 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1466 MonoException* exc = mono_thread_execute_interruption ();
1468 mono_raise_exception (exc);
1470 // FIXME: !MONO_INFINITE_WAIT
1471 if (ms != MONO_INFINITE_WAIT)
1480 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1485 ves_icall_System_Threading_Thread_GetDomainID (void)
1487 return mono_domain_get()->domain_id;
1491 ves_icall_System_Threading_Thread_Yield (void)
1493 return mono_thread_info_yield ();
1497 * mono_thread_get_name:
1499 * Return the name of the thread. NAME_LEN is set to the length of the name.
1500 * Return NULL if the thread has no name. The returned memory is owned by the
1504 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1508 LOCK_THREAD (this_obj);
1510 if (!this_obj->name) {
1514 *name_len = this_obj->name_len;
1515 res = g_new (gunichar2, this_obj->name_len);
1516 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1519 UNLOCK_THREAD (this_obj);
1525 * mono_thread_get_name_utf8:
1526 * \returns the name of the thread in UTF-8.
1527 * Return NULL if the thread has no name.
1528 * The returned memory is owned by the caller.
1531 mono_thread_get_name_utf8 (MonoThread *thread)
1536 MonoInternalThread *internal = thread->internal_thread;
1537 if (internal == NULL)
1540 LOCK_THREAD (internal);
1542 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1544 UNLOCK_THREAD (internal);
1550 * mono_thread_get_managed_id:
1551 * \returns the \c Thread.ManagedThreadId value of \p thread.
1552 * Returns \c -1 if \p thread is NULL.
1555 mono_thread_get_managed_id (MonoThread *thread)
1560 MonoInternalThread *internal = thread->internal_thread;
1561 if (internal == NULL)
1564 int32_t id = internal->managed_id;
1570 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1575 error_init (&error);
1577 LOCK_THREAD (this_obj);
1579 if (!this_obj->name)
1582 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1584 UNLOCK_THREAD (this_obj);
1586 if (mono_error_set_pending_exception (&error))
1593 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1595 LOCK_THREAD (this_obj);
1600 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1601 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1602 UNLOCK_THREAD (this_obj);
1604 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1607 if (this_obj->name) {
1608 g_free (this_obj->name);
1609 this_obj->name_len = 0;
1612 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1613 this_obj->name_len = mono_string_length (name);
1616 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1619 this_obj->name = NULL;
1622 UNLOCK_THREAD (this_obj);
1624 if (this_obj->name && this_obj->tid) {
1625 char *tname = mono_string_to_utf8_checked (name, error);
1626 return_if_nok (error);
1627 mono_profiler_thread_name (this_obj->tid, tname);
1628 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1634 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1637 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1638 mono_error_set_pending_exception (&error);
1642 * ves_icall_System_Threading_Thread_GetPriority_internal:
1643 * @param this_obj: The MonoInternalThread on which to operate.
1645 * Gets the priority of the given thread.
1646 * @return: The priority of the given thread.
1649 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1652 MonoInternalThread *internal = this_obj->internal_thread;
1654 LOCK_THREAD (internal);
1655 priority = internal->priority;
1656 UNLOCK_THREAD (internal);
1662 * ves_icall_System_Threading_Thread_SetPriority_internal:
1663 * @param this_obj: The MonoInternalThread on which to operate.
1664 * @param priority: The priority to set.
1666 * Sets the priority of the given thread.
1669 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1671 MonoInternalThread *internal = this_obj->internal_thread;
1673 LOCK_THREAD (internal);
1674 internal->priority = priority;
1675 if (internal->thread_info != NULL)
1676 mono_thread_internal_set_priority (internal, priority);
1677 UNLOCK_THREAD (internal);
1680 /* If the array is already in the requested domain, we just return it,
1681 otherwise we return a copy in that domain. */
1683 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1691 if (mono_object_domain (arr) == domain)
1694 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1695 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1700 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1703 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1704 mono_error_set_pending_exception (&error);
1709 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1712 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1713 mono_error_set_pending_exception (&error);
1718 * mono_thread_current:
1721 mono_thread_current (void)
1723 MonoDomain *domain = mono_domain_get ();
1724 MonoInternalThread *internal = mono_thread_internal_current ();
1725 MonoThread **current_thread_ptr;
1727 g_assert (internal);
1728 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1730 if (!*current_thread_ptr) {
1731 g_assert (domain != mono_get_root_domain ());
1732 *current_thread_ptr = create_thread_object (domain, internal);
1734 return *current_thread_ptr;
1737 /* Return the thread object belonging to INTERNAL in the current domain */
1739 mono_thread_current_for_thread (MonoInternalThread *internal)
1741 MonoDomain *domain = mono_domain_get ();
1742 MonoThread **current_thread_ptr;
1744 g_assert (internal);
1745 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1747 if (!*current_thread_ptr) {
1748 g_assert (domain != mono_get_root_domain ());
1749 *current_thread_ptr = create_thread_object (domain, internal);
1751 return *current_thread_ptr;
1755 mono_thread_internal_current (void)
1757 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1758 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1762 static MonoThreadInfoWaitRet
1763 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1766 MonoThreadInfoWaitRet ret;
1773 start = (ms == -1) ? 0 : mono_msec_ticks ();
1776 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1779 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1782 exc = mono_thread_execute_interruption ();
1784 mono_error_set_exception_instance (error, exc);
1791 /* Re-calculate ms according to the time passed */
1792 diff_ms = (gint32)(mono_msec_ticks () - start);
1793 if (diff_ms >= ms) {
1794 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1797 wait = ms - diff_ms;
1804 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1806 MonoInternalThread *thread = this_obj->internal_thread;
1807 MonoThreadHandle *handle = thread->handle;
1808 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1812 if (mono_thread_current_check_pending_interrupt ())
1815 LOCK_THREAD (thread);
1817 if ((thread->state & ThreadState_Unstarted) != 0) {
1818 UNLOCK_THREAD (thread);
1820 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1824 UNLOCK_THREAD (thread);
1827 ms=MONO_INFINITE_WAIT;
1829 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1831 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1833 ret=mono_join_uninterrupted (handle, ms, &error);
1835 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1837 mono_error_set_pending_exception (&error);
1839 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1840 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1845 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1850 #define MANAGED_WAIT_FAILED 0x7fffffff
1853 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1855 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1856 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1857 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1858 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1859 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1860 return WAIT_IO_COMPLETION;
1861 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1862 return WAIT_TIMEOUT;
1863 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1864 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1865 return MANAGED_WAIT_FAILED;
1867 g_error ("%s: unknown val value %d", __func__, val);
1871 static MonoW32HandleWaitRet
1872 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1875 MonoW32HandleWaitRet ret;
1882 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1886 if (numhandles != 1)
1887 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1889 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1891 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1892 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1893 #endif /* HOST_WIN32 */
1896 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1899 exc = mono_thread_execute_interruption ();
1901 mono_error_set_exception_instance (error, exc);
1908 /* Re-calculate ms according to the time passed */
1909 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1910 if (diff_ms >= ms) {
1911 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1914 wait = ms - diff_ms;
1920 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1925 MonoW32HandleWaitRet ret;
1927 MonoObject *waitHandle;
1928 MonoInternalThread *thread = mono_thread_internal_current ();
1930 /* Do this WaitSleepJoin check before creating objects */
1931 if (mono_thread_current_check_pending_interrupt ())
1932 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1934 /* We fail in managed if the array has more than 64 elements */
1935 numhandles = (guint32)mono_array_length(mono_handles);
1936 handles = g_new0(HANDLE, numhandles);
1938 for(i = 0; i < numhandles; i++) {
1939 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1940 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1944 ms=MONO_INFINITE_WAIT;
1947 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1949 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1951 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1955 mono_error_set_pending_exception (&error);
1957 return map_native_wait_result_to_managed (ret, numhandles);
1960 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1963 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1964 uintptr_t numhandles;
1965 MonoW32HandleWaitRet ret;
1967 MonoObject *waitHandle;
1968 MonoInternalThread *thread = mono_thread_internal_current ();
1970 /* Do this WaitSleepJoin check before creating objects */
1971 if (mono_thread_current_check_pending_interrupt ())
1972 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1974 numhandles = mono_array_length(mono_handles);
1975 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1976 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1978 for(i = 0; i < numhandles; i++) {
1979 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1980 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1984 ms=MONO_INFINITE_WAIT;
1987 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1989 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1991 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1993 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1995 mono_error_set_pending_exception (&error);
1997 return map_native_wait_result_to_managed (ret, numhandles);
2000 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
2003 MonoW32HandleWaitRet ret;
2004 MonoInternalThread *thread = mono_thread_internal_current ();
2006 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
2009 ms=MONO_INFINITE_WAIT;
2012 if (mono_thread_current_check_pending_interrupt ())
2013 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2015 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2017 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
2019 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2021 mono_error_set_pending_exception (&error);
2022 return map_native_wait_result_to_managed (ret, 1);
2026 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
2028 MonoW32HandleWaitRet ret;
2029 MonoInternalThread *thread = mono_thread_internal_current ();
2032 ms = MONO_INFINITE_WAIT;
2034 if (mono_thread_current_check_pending_interrupt ())
2035 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2037 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2041 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
2043 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
2047 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2049 return map_native_wait_result_to_managed (ret, 1);
2052 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2054 return InterlockedIncrement (location);
2057 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2059 #if SIZEOF_VOID_P == 4
2060 if (G_UNLIKELY ((size_t)location & 0x7)) {
2062 mono_interlocked_lock ();
2065 mono_interlocked_unlock ();
2069 return InterlockedIncrement64 (location);
2072 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2074 return InterlockedDecrement(location);
2077 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2079 #if SIZEOF_VOID_P == 4
2080 if (G_UNLIKELY ((size_t)location & 0x7)) {
2082 mono_interlocked_lock ();
2085 mono_interlocked_unlock ();
2089 return InterlockedDecrement64 (location);
2092 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2094 return InterlockedExchange(location, value);
2097 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2100 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2101 mono_gc_wbarrier_generic_nostore (location);
2105 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2107 return InterlockedExchangePointer(location, value);
2110 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2112 IntFloatUnion val, ret;
2115 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2121 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2123 #if SIZEOF_VOID_P == 4
2124 if (G_UNLIKELY ((size_t)location & 0x7)) {
2126 mono_interlocked_lock ();
2129 mono_interlocked_unlock ();
2133 return InterlockedExchange64 (location, value);
2137 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2139 LongDoubleUnion val, ret;
2142 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2147 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2149 return InterlockedCompareExchange(location, value, comparand);
2152 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2154 gint32 r = InterlockedCompareExchange(location, value, comparand);
2155 *success = r == comparand;
2159 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2162 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2163 mono_gc_wbarrier_generic_nostore (location);
2167 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2169 return InterlockedCompareExchangePointer(location, value, comparand);
2172 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2174 IntFloatUnion val, ret, cmp;
2177 cmp.fval = comparand;
2178 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2184 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2186 #if SIZEOF_VOID_P == 8
2187 LongDoubleUnion val, comp, ret;
2190 comp.fval = comparand;
2191 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2197 mono_interlocked_lock ();
2199 if (old == comparand)
2201 mono_interlocked_unlock ();
2208 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2210 #if SIZEOF_VOID_P == 4
2211 if (G_UNLIKELY ((size_t)location & 0x7)) {
2213 mono_interlocked_lock ();
2215 if (old == comparand)
2217 mono_interlocked_unlock ();
2221 return InterlockedCompareExchange64 (location, value, comparand);
2225 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2228 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2229 mono_gc_wbarrier_generic_nostore (location);
2234 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2237 MONO_CHECK_NULL (location, NULL);
2238 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2239 mono_gc_wbarrier_generic_nostore (location);
2244 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2246 return InterlockedAdd (location, value);
2250 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2252 #if SIZEOF_VOID_P == 4
2253 if (G_UNLIKELY ((size_t)location & 0x7)) {
2255 mono_interlocked_lock ();
2258 mono_interlocked_unlock ();
2262 return InterlockedAdd64 (location, value);
2266 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2268 #if SIZEOF_VOID_P == 4
2269 if (G_UNLIKELY ((size_t)location & 0x7)) {
2271 mono_interlocked_lock ();
2273 mono_interlocked_unlock ();
2277 return InterlockedRead64 (location);
2281 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2283 mono_memory_barrier ();
2287 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2289 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2291 if (state & ThreadState_Background) {
2292 /* If the thread changes the background mode, the main thread has to
2293 * be notified, since it has to rebuild the list of threads to
2296 mono_os_event_set (&background_change_event);
2301 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2303 mono_thread_set_state (this_obj, (MonoThreadState)state);
2305 if (state & ThreadState_Background) {
2306 /* If the thread changes the background mode, the main thread has to
2307 * be notified, since it has to rebuild the list of threads to
2310 mono_os_event_set (&background_change_event);
2315 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2319 LOCK_THREAD (this_obj);
2321 state = this_obj->state;
2323 UNLOCK_THREAD (this_obj);
2328 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2330 MonoInternalThread *current;
2332 MonoInternalThread *thread = this_obj->internal_thread;
2334 LOCK_THREAD (thread);
2336 current = mono_thread_internal_current ();
2338 thread->thread_interrupt_requested = TRUE;
2339 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2341 UNLOCK_THREAD (thread);
2344 async_abort_internal (thread, FALSE);
2349 * mono_thread_current_check_pending_interrupt:
2350 * Checks if there's a interruption request and set the pending exception if so.
2351 * \returns true if a pending exception was set
2354 mono_thread_current_check_pending_interrupt (void)
2356 MonoInternalThread *thread = mono_thread_internal_current ();
2357 gboolean throw_ = FALSE;
2359 LOCK_THREAD (thread);
2361 if (thread->thread_interrupt_requested) {
2363 thread->thread_interrupt_requested = FALSE;
2366 UNLOCK_THREAD (thread);
2369 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2374 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2376 LOCK_THREAD (thread);
2378 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2380 UNLOCK_THREAD (thread);
2384 if ((thread->state & ThreadState_Unstarted) != 0) {
2385 thread->state |= ThreadState_Aborted;
2386 UNLOCK_THREAD (thread);
2390 thread->state |= ThreadState_AbortRequested;
2391 if (thread->abort_state_handle)
2392 mono_gchandle_free (thread->abort_state_handle);
2394 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2395 g_assert (thread->abort_state_handle);
2397 thread->abort_state_handle = 0;
2399 thread->abort_exc = NULL;
2401 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));
2403 /* During shutdown, we can't wait for other threads */
2405 /* Make sure the thread is awake */
2406 mono_thread_resume (thread);
2408 UNLOCK_THREAD (thread);
2413 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2415 if (!request_thread_abort (thread, state))
2418 if (thread == mono_thread_internal_current ()) {
2420 self_abort_internal (&error);
2421 mono_error_set_pending_exception (&error);
2423 async_abort_internal (thread, TRUE);
2428 * mono_thread_internal_abort:
2429 * Request thread \p thread to be aborted.
2430 * \p thread MUST NOT be the current thread.
2433 mono_thread_internal_abort (MonoInternalThread *thread)
2435 g_assert (thread != mono_thread_internal_current ());
2437 if (!request_thread_abort (thread, NULL))
2439 async_abort_internal (thread, TRUE);
2443 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2445 MonoInternalThread *thread = mono_thread_internal_current ();
2446 gboolean was_aborting;
2448 LOCK_THREAD (thread);
2449 was_aborting = thread->state & ThreadState_AbortRequested;
2450 thread->state &= ~ThreadState_AbortRequested;
2451 UNLOCK_THREAD (thread);
2453 if (!was_aborting) {
2454 const char *msg = "Unable to reset abort because no abort was requested";
2455 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2459 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2460 thread->abort_exc = NULL;
2461 if (thread->abort_state_handle) {
2462 mono_gchandle_free (thread->abort_state_handle);
2463 /* This is actually not necessary - the handle
2464 only counts if the exception is set */
2465 thread->abort_state_handle = 0;
2470 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2472 LOCK_THREAD (thread);
2474 thread->state &= ~ThreadState_AbortRequested;
2476 if (thread->abort_exc) {
2477 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2478 thread->abort_exc = NULL;
2479 if (thread->abort_state_handle) {
2480 mono_gchandle_free (thread->abort_state_handle);
2481 /* This is actually not necessary - the handle
2482 only counts if the exception is set */
2483 thread->abort_state_handle = 0;
2487 UNLOCK_THREAD (thread);
2491 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2494 MonoInternalThread *thread = this_obj->internal_thread;
2495 MonoObject *state, *deserialized = NULL;
2498 if (!thread->abort_state_handle)
2501 state = mono_gchandle_get_target (thread->abort_state_handle);
2504 domain = mono_domain_get ();
2505 if (mono_object_domain (state) == domain)
2508 deserialized = mono_object_xdomain_representation (state, domain, &error);
2510 if (!deserialized) {
2511 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2512 if (!is_ok (&error)) {
2513 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2514 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2516 mono_set_pending_exception (invalid_op_exc);
2520 return deserialized;
2524 mono_thread_suspend (MonoInternalThread *thread)
2526 LOCK_THREAD (thread);
2528 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2530 UNLOCK_THREAD (thread);
2534 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2536 UNLOCK_THREAD (thread);
2540 thread->state |= ThreadState_SuspendRequested;
2541 mono_os_event_reset (thread->suspended);
2543 if (thread == mono_thread_internal_current ()) {
2544 /* calls UNLOCK_THREAD (thread) */
2545 self_suspend_internal ();
2547 /* calls UNLOCK_THREAD (thread) */
2548 async_suspend_internal (thread, FALSE);
2555 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2557 if (!mono_thread_suspend (this_obj->internal_thread)) {
2558 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2563 /* LOCKING: LOCK_THREAD(thread) must be held */
2565 mono_thread_resume (MonoInternalThread *thread)
2567 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2568 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2569 thread->state &= ~ThreadState_SuspendRequested;
2570 mono_os_event_set (thread->suspended);
2574 if ((thread->state & ThreadState_Suspended) == 0 ||
2575 (thread->state & ThreadState_Unstarted) != 0 ||
2576 (thread->state & ThreadState_Aborted) != 0 ||
2577 (thread->state & ThreadState_Stopped) != 0)
2579 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2583 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2585 mono_os_event_set (thread->suspended);
2587 if (!thread->self_suspended) {
2588 UNLOCK_THREAD (thread);
2590 /* Awake the thread */
2591 if (!mono_thread_info_resume (thread_get_tid (thread)))
2594 LOCK_THREAD (thread);
2597 thread->state &= ~ThreadState_Suspended;
2603 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2605 if (!thread->internal_thread) {
2606 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2608 LOCK_THREAD (thread->internal_thread);
2609 if (!mono_thread_resume (thread->internal_thread))
2610 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2611 UNLOCK_THREAD (thread->internal_thread);
2616 mono_threads_is_critical_method (MonoMethod *method)
2618 switch (method->wrapper_type) {
2619 case MONO_WRAPPER_RUNTIME_INVOKE:
2620 case MONO_WRAPPER_XDOMAIN_INVOKE:
2621 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2628 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2633 if (mono_threads_is_critical_method (m)) {
2634 *((gboolean*)data) = TRUE;
2641 is_running_protected_wrapper (void)
2643 gboolean found = FALSE;
2644 mono_stack_walk (find_wrapper, &found);
2652 mono_thread_stop (MonoThread *thread)
2654 MonoInternalThread *internal = thread->internal_thread;
2656 if (!request_thread_abort (internal, NULL))
2659 if (internal == mono_thread_internal_current ()) {
2661 self_abort_internal (&error);
2663 This function is part of the embeding API and has no way to return the exception
2664 to be thrown. So what we do is keep the old behavior and raise the exception.
2666 mono_error_raise_exception (&error); /* OK to throw, see note */
2668 async_abort_internal (internal, TRUE);
2673 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2675 gint8 tmp = *(volatile gint8 *)ptr;
2676 mono_memory_barrier ();
2681 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2683 gint16 tmp = *(volatile gint16 *)ptr;
2684 mono_memory_barrier ();
2689 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2691 gint32 tmp = *(volatile gint32 *)ptr;
2692 mono_memory_barrier ();
2697 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2699 gint64 tmp = *(volatile gint64 *)ptr;
2700 mono_memory_barrier ();
2705 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2707 volatile void *tmp = *(volatile void **)ptr;
2708 mono_memory_barrier ();
2709 return (void *) tmp;
2713 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2715 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2716 mono_memory_barrier ();
2717 return (MonoObject *) tmp;
2721 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2723 double tmp = *(volatile double *)ptr;
2724 mono_memory_barrier ();
2729 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2731 float tmp = *(volatile float *)ptr;
2732 mono_memory_barrier ();
2737 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2739 return InterlockedRead8 ((volatile gint8 *)ptr);
2743 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2745 return InterlockedRead16 ((volatile gint16 *)ptr);
2749 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2751 return InterlockedRead ((volatile gint32 *)ptr);
2755 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2757 #if SIZEOF_VOID_P == 4
2758 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2760 mono_interlocked_lock ();
2761 val = *(gint64*)ptr;
2762 mono_interlocked_unlock ();
2766 return InterlockedRead64 ((volatile gint64 *)ptr);
2770 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2772 return InterlockedReadPointer ((volatile gpointer *)ptr);
2776 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2780 #if SIZEOF_VOID_P == 4
2781 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2783 mono_interlocked_lock ();
2784 val = *(double*)ptr;
2785 mono_interlocked_unlock ();
2790 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2796 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2800 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2806 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2808 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2812 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2814 mono_memory_barrier ();
2815 *(volatile gint8 *)ptr = value;
2819 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2821 mono_memory_barrier ();
2822 *(volatile gint16 *)ptr = value;
2826 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2828 mono_memory_barrier ();
2829 *(volatile gint32 *)ptr = value;
2833 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2835 mono_memory_barrier ();
2836 *(volatile gint64 *)ptr = value;
2840 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2842 mono_memory_barrier ();
2843 *(volatile void **)ptr = value;
2847 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2849 mono_memory_barrier ();
2850 mono_gc_wbarrier_generic_store (ptr, value);
2854 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2856 mono_memory_barrier ();
2857 *(volatile double *)ptr = value;
2861 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2863 mono_memory_barrier ();
2864 *(volatile float *)ptr = value;
2868 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2870 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2874 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2876 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2880 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2882 InterlockedWrite ((volatile gint32 *)ptr, value);
2886 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2888 #if SIZEOF_VOID_P == 4
2889 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2890 mono_interlocked_lock ();
2891 *(gint64*)ptr = value;
2892 mono_interlocked_unlock ();
2897 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2901 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2903 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2907 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2911 #if SIZEOF_VOID_P == 4
2912 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2913 mono_interlocked_lock ();
2914 *(double*)ptr = value;
2915 mono_interlocked_unlock ();
2922 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2926 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2932 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2936 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2938 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2942 free_context (void *user_data)
2944 ContextStaticData *data = user_data;
2946 mono_threads_lock ();
2949 * There is no guarantee that, by the point this reference queue callback
2950 * has been invoked, the GC handle associated with the object will fail to
2951 * resolve as one might expect. So if we don't free and remove the GC
2952 * handle here, free_context_static_data_helper () could end up resolving
2953 * a GC handle to an actually-dead context which would contain a pointer
2954 * to an already-freed static data segment, resulting in a crash when
2957 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2959 mono_threads_unlock ();
2961 mono_gchandle_free (data->gc_handle);
2962 mono_free_static_data (data->static_data);
2967 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2969 mono_threads_lock ();
2971 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2974 contexts = g_hash_table_new (NULL, NULL);
2977 context_queue = mono_gc_reference_queue_new (free_context);
2979 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2980 g_hash_table_insert (contexts, gch, gch);
2983 * We use this intermediate structure to contain a duplicate pointer to
2984 * the static data because we can't rely on being able to resolve the GC
2985 * handle in the reference queue callback.
2987 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2988 data->gc_handle = GPOINTER_TO_UINT (gch);
2991 context_adjust_static_data (ctx);
2992 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2994 mono_threads_unlock ();
2996 mono_profiler_context_loaded (ctx);
3000 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
3003 * NOTE: Since finalizers are unreliable for the purposes of ensuring
3004 * cleanup in exceptional circumstances, we don't actually do any
3005 * cleanup work here. We instead do this via a reference queue.
3008 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
3010 mono_profiler_context_unloaded (ctx);
3013 void mono_thread_init (MonoThreadStartCB start_cb,
3014 MonoThreadAttachCB attach_cb)
3016 mono_coop_mutex_init_recursive (&threads_mutex);
3018 mono_os_mutex_init_recursive(&interlocked_mutex);
3019 mono_os_mutex_init_recursive(&joinable_threads_mutex);
3021 mono_os_event_init (&background_change_event, FALSE);
3023 mono_init_static_data_info (&thread_static_info);
3024 mono_init_static_data_info (&context_static_info);
3026 mono_thread_start_cb = start_cb;
3027 mono_thread_attach_cb = attach_cb;
3031 * mono_thread_cleanup:
3034 mono_thread_cleanup (void)
3036 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3037 /* The main thread must abandon any held mutexes (particularly
3038 * important for named mutexes as they are shared across
3039 * processes, see bug 74680.) This will happen when the
3040 * thread exits, but if it's not running in a subthread it
3041 * won't exit in time.
3043 mono_w32mutex_abandon ();
3047 /* This stuff needs more testing, it seems one of these
3048 * critical sections can be locked when mono_thread_cleanup is
3051 mono_coop_mutex_destroy (&threads_mutex);
3052 mono_os_mutex_destroy (&interlocked_mutex);
3053 mono_os_mutex_destroy (&delayed_free_table_mutex);
3054 mono_os_mutex_destroy (&small_id_mutex);
3055 mono_os_event_destroy (&background_change_event);
3060 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3062 mono_thread_cleanup_fn = func;
3066 * mono_thread_set_manage_callback:
3069 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3071 thread->internal_thread->manage_callback = func;
3075 static void print_tids (gpointer key, gpointer value, gpointer user)
3077 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3078 * sizeof(uint) and a cast to uint would overflow
3080 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3081 * print this as a pointer.
3083 g_message ("Waiting for: %p", key);
3088 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3089 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3094 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3097 MonoThreadInfoWaitRet ret;
3099 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3101 /* Add the thread state change event, so it wakes
3102 * up if a thread changes to background mode. */
3105 if (check_state_change)
3106 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3108 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3111 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3112 /* See the comment in build_wait_tids() */
3113 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3117 for( i = 0; i < wait->num; i++)
3118 mono_threads_close_thread_handle (wait->handles [i]);
3120 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3123 if (ret < wait->num) {
3124 MonoInternalThread *internal;
3126 internal = wait->threads [ret];
3128 mono_threads_lock ();
3129 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3130 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3131 mono_threads_unlock ();
3135 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3137 struct wait_data *wait=(struct wait_data *)user;
3139 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3140 MonoInternalThread *thread=(MonoInternalThread *)value;
3142 /* Ignore background threads, we abort them later */
3143 /* Do not lock here since it is not needed and the caller holds threads_lock */
3144 if (thread->state & ThreadState_Background) {
3145 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3146 return; /* just leave, ignore */
3149 if (mono_gc_is_finalizer_internal_thread (thread)) {
3150 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3154 if (thread == mono_thread_internal_current ()) {
3155 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3159 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3160 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3164 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3165 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3169 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3170 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3171 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3172 wait->threads[wait->num]=thread;
3175 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3177 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3182 /* Just ignore the rest, we can't do anything with
3189 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3191 struct wait_data *wait=(struct wait_data *)user;
3192 MonoNativeThreadId self = mono_native_thread_id_get ();
3193 MonoInternalThread *thread = (MonoInternalThread *)value;
3195 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3198 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3200 if (mono_gc_is_finalizer_internal_thread (thread))
3203 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3204 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3205 wait->threads[wait->num] = thread;
3208 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3209 mono_thread_internal_abort (thread);
3216 * mono_threads_set_shutting_down:
3218 * Is called by a thread that wants to shut down Mono. If the runtime is already
3219 * shutting down, the calling thread is suspended/stopped, and this function never
3223 mono_threads_set_shutting_down (void)
3225 MonoInternalThread *current_thread = mono_thread_internal_current ();
3227 mono_threads_lock ();
3229 if (shutting_down) {
3230 mono_threads_unlock ();
3232 /* Make sure we're properly suspended/stopped */
3234 LOCK_THREAD (current_thread);
3236 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3237 UNLOCK_THREAD (current_thread);
3238 mono_thread_execute_interruption ();
3240 UNLOCK_THREAD (current_thread);
3243 /*since we're killing the thread, detach it.*/
3244 mono_thread_detach_internal (current_thread);
3246 /* Wake up other threads potentially waiting for us */
3247 mono_thread_info_exit (0);
3249 shutting_down = TRUE;
3251 /* Not really a background state change, but this will
3252 * interrupt the main thread if it is waiting for all
3253 * the other threads.
3255 mono_os_event_set (&background_change_event);
3257 mono_threads_unlock ();
3262 * mono_thread_manage:
3265 mono_thread_manage (void)
3267 struct wait_data wait_data;
3268 struct wait_data *wait = &wait_data;
3270 memset (wait, 0, sizeof (struct wait_data));
3271 /* join each thread that's still running */
3272 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3274 mono_threads_lock ();
3276 THREAD_DEBUG (g_message("%s: No threads", __func__));
3277 mono_threads_unlock ();
3280 mono_threads_unlock ();
3283 mono_threads_lock ();
3284 if (shutting_down) {
3285 /* somebody else is shutting down */
3286 mono_threads_unlock ();
3289 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3290 mono_g_hash_table_foreach (threads, print_tids, NULL));
3292 mono_os_event_reset (&background_change_event);
3294 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3295 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3296 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3297 mono_threads_unlock ();
3299 /* Something to wait for */
3300 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3301 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3302 } while(wait->num>0);
3304 /* Mono is shutting down, so just wait for the end */
3305 if (!mono_runtime_try_shutdown ()) {
3306 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3307 mono_thread_suspend (mono_thread_internal_current ());
3308 mono_thread_execute_interruption ();
3312 * Remove everything but the finalizer thread and self.
3313 * Also abort all the background threads
3316 mono_threads_lock ();
3319 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3320 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3321 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3323 mono_threads_unlock ();
3325 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3326 if (wait->num > 0) {
3327 /* Something to wait for */
3328 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3330 } while (wait->num > 0);
3333 * give the subthreads a chance to really quit (this is mainly needed
3334 * to get correct user and system times from getrusage/wait/time(1)).
3335 * This could be removed if we avoid pthread_detach() and use pthread_join().
3337 mono_thread_info_yield ();
3341 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3343 MonoInternalThread *thread = (MonoInternalThread*)value;
3344 struct wait_data *wait = (struct wait_data*)user_data;
3347 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3349 * This needs no locking.
3351 if ((thread->state & ThreadState_Suspended) != 0 ||
3352 (thread->state & ThreadState_Stopped) != 0)
3355 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3356 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3357 wait->threads [wait->num] = thread;
3363 * mono_thread_suspend_all_other_threads:
3365 * Suspend all managed threads except the finalizer thread and this thread. It is
3366 * not possible to resume them later.
3368 void mono_thread_suspend_all_other_threads (void)
3370 struct wait_data wait_data;
3371 struct wait_data *wait = &wait_data;
3373 MonoNativeThreadId self = mono_native_thread_id_get ();
3374 guint32 eventidx = 0;
3375 gboolean starting, finished;
3377 memset (wait, 0, sizeof (struct wait_data));
3379 * The other threads could be in an arbitrary state at this point, i.e.
3380 * they could be starting up, shutting down etc. This means that there could be
3381 * threads which are not even in the threads hash table yet.
3385 * First we set a barrier which will be checked by all threads before they
3386 * are added to the threads hash table, and they will exit if the flag is set.
3387 * This ensures that no threads could be added to the hash later.
3388 * We will use shutting_down as the barrier for now.
3390 g_assert (shutting_down);
3393 * We make multiple calls to WaitForMultipleObjects since:
3394 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3395 * - some threads could exit without becoming suspended
3400 * Make a copy of the hashtable since we can't do anything with
3401 * threads while threads_mutex is held.
3404 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3405 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3406 mono_threads_lock ();
3407 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3408 mono_threads_unlock ();
3411 /* Get the suspended events that we'll be waiting for */
3412 for (i = 0; i < wait->num; ++i) {
3413 MonoInternalThread *thread = wait->threads [i];
3415 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3416 || mono_gc_is_finalizer_internal_thread (thread)
3417 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3419 mono_threads_close_thread_handle (wait->handles [i]);
3420 wait->threads [i] = NULL;
3424 LOCK_THREAD (thread);
3426 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3427 UNLOCK_THREAD (thread);
3428 mono_threads_close_thread_handle (wait->handles [i]);
3429 wait->threads [i] = NULL;
3435 /* Convert abort requests into suspend requests */
3436 if ((thread->state & ThreadState_AbortRequested) != 0)
3437 thread->state &= ~ThreadState_AbortRequested;
3439 thread->state |= ThreadState_SuspendRequested;
3440 mono_os_event_reset (thread->suspended);
3442 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3443 async_suspend_internal (thread, TRUE);
3445 mono_threads_close_thread_handle (wait->handles [i]);
3446 wait->threads [i] = NULL;
3448 if (eventidx <= 0) {
3450 * If there are threads which are starting up, we wait until they
3451 * are suspended when they try to register in the threads hash.
3452 * This is guaranteed to finish, since the threads which can create new
3453 * threads get suspended after a while.
3454 * FIXME: The finalizer thread can still create new threads.
3456 mono_threads_lock ();
3457 if (threads_starting_up)
3458 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3461 mono_threads_unlock ();
3463 mono_thread_info_sleep (100, NULL);
3471 MonoInternalThread *thread;
3472 MonoStackFrameInfo *frames;
3473 int nframes, max_frames;
3474 int nthreads, max_threads;
3475 MonoInternalThread **threads;
3476 } ThreadDumpUserData;
3478 static gboolean thread_dump_requested;
3480 /* This needs to be async safe */
3482 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3484 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3486 if (ud->nframes < ud->max_frames) {
3487 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3494 /* This needs to be async safe */
3495 static SuspendThreadResult
3496 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3498 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3499 MonoInternalThread *thread = user_data->thread;
3502 /* This no longer works with remote unwinding */
3503 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3504 mono_thread_internal_describe (thread, text);
3505 g_string_append (text, "\n");
3508 if (thread == mono_thread_internal_current ())
3509 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3511 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3513 return MonoResumeThread;
3517 int nthreads, max_threads;
3518 MonoInternalThread **threads;
3519 } CollectThreadsUserData;
3522 collect_thread (gpointer key, gpointer value, gpointer user)
3524 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3525 MonoInternalThread *thread = (MonoInternalThread *)value;
3527 if (ud->nthreads < ud->max_threads)
3528 ud->threads [ud->nthreads ++] = thread;
3532 * Collect running threads into the THREADS array.
3533 * THREADS should be an array allocated on the stack.
3536 collect_threads (MonoInternalThread **thread_array, int max_threads)
3538 CollectThreadsUserData ud;
3540 memset (&ud, 0, sizeof (ud));
3541 /* This array contains refs, but its on the stack, so its ok */
3542 ud.threads = thread_array;
3543 ud.max_threads = max_threads;
3545 mono_threads_lock ();
3546 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3547 mono_threads_unlock ();
3553 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3555 GString* text = g_string_new (0);
3557 GError *error = NULL;
3560 ud->thread = thread;
3563 /* Collect frames for the thread */
3564 if (thread == mono_thread_internal_current ()) {
3565 get_thread_dump (mono_thread_info_current (), ud);
3567 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3571 * Do all the non async-safe work outside of get_thread_dump.
3574 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3576 g_string_append_printf (text, "\n\"%s\"", name);
3579 else if (thread->threadpool_thread) {
3580 g_string_append (text, "\n\"<threadpool thread>\"");
3582 g_string_append (text, "\n\"<unnamed thread>\"");
3585 for (i = 0; i < ud->nframes; ++i) {
3586 MonoStackFrameInfo *frame = &ud->frames [i];
3587 MonoMethod *method = NULL;
3589 if (frame->type == FRAME_TYPE_MANAGED)
3590 method = mono_jit_info_get_method (frame->ji);
3593 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3594 g_string_append_printf (text, " %s\n", location);
3597 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3601 fprintf (stdout, "%s", text->str);
3603 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3604 OutputDebugStringA(text->str);
3607 g_string_free (text, TRUE);
3612 mono_threads_perform_thread_dump (void)
3614 ThreadDumpUserData ud;
3615 MonoInternalThread *thread_array [128];
3616 int tindex, nthreads;
3618 if (!thread_dump_requested)
3621 printf ("Full thread dump:\n");
3623 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3624 nthreads = collect_threads (thread_array, 128);
3626 memset (&ud, 0, sizeof (ud));
3627 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3628 ud.max_frames = 256;
3630 for (tindex = 0; tindex < nthreads; ++tindex)
3631 dump_thread (thread_array [tindex], &ud);
3635 thread_dump_requested = FALSE;
3638 /* Obtain the thread dump of all threads */
3640 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3643 ThreadDumpUserData ud;
3644 MonoInternalThread *thread_array [128];
3645 MonoDomain *domain = mono_domain_get ();
3646 MonoDebugSourceLocation *location;
3647 int tindex, nthreads;
3651 *out_threads = NULL;
3652 *out_stack_frames = NULL;
3654 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3655 nthreads = collect_threads (thread_array, 128);
3657 memset (&ud, 0, sizeof (ud));
3658 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3659 ud.max_frames = 256;
3661 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3664 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3668 for (tindex = 0; tindex < nthreads; ++tindex) {
3669 MonoInternalThread *thread = thread_array [tindex];
3670 MonoArray *thread_frames;
3676 /* Collect frames for the thread */
3677 if (thread == mono_thread_internal_current ()) {
3678 get_thread_dump (mono_thread_info_current (), &ud);
3680 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3683 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3685 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3688 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3690 for (i = 0; i < ud.nframes; ++i) {
3691 MonoStackFrameInfo *frame = &ud.frames [i];
3692 MonoMethod *method = NULL;
3693 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3697 sf->native_offset = frame->native_offset;
3699 if (frame->type == FRAME_TYPE_MANAGED)
3700 method = mono_jit_info_get_method (frame->ji);
3703 sf->method_address = (gsize) frame->ji->code_start;
3705 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3708 MONO_OBJECT_SETREF (sf, method, rm);
3710 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3712 sf->il_offset = location->il_offset;
3714 if (location && location->source_file) {
3715 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3716 sf->line = location->row;
3717 sf->column = location->column;
3719 mono_debug_free_source_location (location);
3724 mono_array_setref (thread_frames, i, sf);
3730 return is_ok (error);
3734 * mono_threads_request_thread_dump:
3736 * Ask all threads except the current to print their stacktrace to stdout.
3739 mono_threads_request_thread_dump (void)
3741 /*The new thread dump code runs out of the finalizer thread. */
3742 thread_dump_requested = TRUE;
3743 mono_gc_finalize_notify ();
3748 gint allocated; /* +1 so that refs [allocated] == NULL */
3752 typedef struct ref_stack RefStack;
3755 ref_stack_new (gint initial_size)
3759 initial_size = MAX (initial_size, 16) + 1;
3760 rs = g_new0 (RefStack, 1);
3761 rs->refs = g_new0 (gpointer, initial_size);
3762 rs->allocated = initial_size;
3767 ref_stack_destroy (gpointer ptr)
3769 RefStack *rs = (RefStack *)ptr;
3778 ref_stack_push (RefStack *rs, gpointer ptr)
3780 g_assert (rs != NULL);
3782 if (rs->bottom >= rs->allocated) {
3783 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3784 rs->allocated <<= 1;
3785 rs->refs [rs->allocated] = NULL;
3787 rs->refs [rs->bottom++] = ptr;
3791 ref_stack_pop (RefStack *rs)
3793 if (rs == NULL || rs->bottom == 0)
3797 rs->refs [rs->bottom] = NULL;
3801 ref_stack_find (RefStack *rs, gpointer ptr)
3808 for (refs = rs->refs; refs && *refs; refs++) {
3816 * mono_thread_push_appdomain_ref:
3818 * Register that the current thread may have references to objects in domain
3819 * @domain on its stack. Each call to this function should be paired with a
3820 * call to pop_appdomain_ref.
3823 mono_thread_push_appdomain_ref (MonoDomain *domain)
3825 MonoInternalThread *thread = mono_thread_internal_current ();
3828 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3829 SPIN_LOCK (thread->lock_thread_id);
3830 if (thread->appdomain_refs == NULL)
3831 thread->appdomain_refs = ref_stack_new (16);
3832 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3833 SPIN_UNLOCK (thread->lock_thread_id);
3838 mono_thread_pop_appdomain_ref (void)
3840 MonoInternalThread *thread = mono_thread_internal_current ();
3843 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3844 SPIN_LOCK (thread->lock_thread_id);
3845 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3846 SPIN_UNLOCK (thread->lock_thread_id);
3851 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3854 SPIN_LOCK (thread->lock_thread_id);
3855 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3856 SPIN_UNLOCK (thread->lock_thread_id);
3861 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3863 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3866 typedef struct abort_appdomain_data {
3867 struct wait_data wait;
3869 } abort_appdomain_data;
3872 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3874 MonoInternalThread *thread = (MonoInternalThread*)value;
3875 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3876 MonoDomain *domain = data->domain;
3878 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3879 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3881 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3882 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3883 data->wait.threads [data->wait.num] = thread;
3886 /* Just ignore the rest, we can't do anything with
3894 * mono_threads_abort_appdomain_threads:
3896 * Abort threads which has references to the given appdomain.
3899 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3901 #ifdef __native_client__
3905 abort_appdomain_data user_data;
3907 int orig_timeout = timeout;
3910 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3912 start_time = mono_msec_ticks ();
3914 mono_threads_lock ();
3916 user_data.domain = domain;
3917 user_data.wait.num = 0;
3918 /* This shouldn't take any locks */
3919 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3920 mono_threads_unlock ();
3922 if (user_data.wait.num > 0) {
3923 /* Abort the threads outside the threads lock */
3924 for (i = 0; i < user_data.wait.num; ++i)
3925 mono_thread_internal_abort (user_data.wait.threads [i]);
3928 * We should wait for the threads either to abort, or to leave the
3929 * domain. We can't do the latter, so we wait with a timeout.
3931 wait_for_tids (&user_data.wait, 100, FALSE);
3934 /* Update remaining time */
3935 timeout -= mono_msec_ticks () - start_time;
3936 start_time = mono_msec_ticks ();
3938 if (orig_timeout != -1 && timeout < 0)
3941 while (user_data.wait.num > 0);
3943 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3949 * mono_thread_get_undeniable_exception:
3951 * Return an exception which needs to be raised when leaving a catch clause.
3952 * This is used for undeniable exception propagation.
3955 mono_thread_get_undeniable_exception (void)
3957 MonoInternalThread *thread = mono_thread_internal_current ();
3959 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3962 // We don't want to have our exception effect calls made by
3963 // the catching block
3965 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3969 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3970 * exception if the thread no longer references a dying appdomain.
3972 thread->abort_exc->trace_ips = NULL;
3973 thread->abort_exc->stack_trace = NULL;
3974 return thread->abort_exc;
3977 #if MONO_SMALL_CONFIG
3978 #define NUM_STATIC_DATA_IDX 4
3979 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3983 #define NUM_STATIC_DATA_IDX 8
3984 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3985 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3989 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3990 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3993 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3995 gpointer *static_data = (gpointer *)addr;
3997 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3998 void **ptr = (void **)static_data [i];
4003 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4004 void **p = ptr + idx;
4007 mark_func ((MonoObject**)p, gc_data);
4013 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4015 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4019 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4021 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4025 * mono_alloc_static_data
4027 * Allocate memory blocks for storing threads or context static data
4030 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4032 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4035 gpointer* static_data = *static_data_ptr;
4037 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4038 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4040 if (mono_gc_user_markers_supported ()) {
4041 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4042 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4044 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4045 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4048 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4049 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4050 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4051 *static_data_ptr = static_data;
4052 static_data [0] = static_data;
4055 for (i = 1; i <= idx; ++i) {
4056 if (static_data [i])
4059 if (mono_gc_user_markers_supported ())
4060 static_data [i] = g_malloc0 (static_data_size [i]);
4062 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4063 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4064 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4069 mono_free_static_data (gpointer* static_data)
4072 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4073 gpointer p = static_data [i];
4077 * At this point, the static data pointer array is still registered with the
4078 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4079 * data. Freeing the individual arrays without first nulling their slots
4080 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4081 * such an already freed array. See bug #13813.
4083 static_data [i] = NULL;
4084 mono_memory_write_barrier ();
4085 if (mono_gc_user_markers_supported ())
4088 mono_gc_free_fixed (p);
4090 mono_gc_free_fixed (static_data);
4094 * mono_init_static_data_info
4096 * Initializes static data counters
4098 static void mono_init_static_data_info (StaticDataInfo *static_data)
4100 static_data->idx = 0;
4101 static_data->offset = 0;
4102 static_data->freelist = NULL;
4106 * mono_alloc_static_data_slot
4108 * Generates an offset for static data. static_data contains the counters
4109 * used to generate it.
4112 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4114 if (!static_data->idx && !static_data->offset) {
4116 * we use the first chunk of the first allocation also as
4117 * an array for the rest of the data
4119 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4121 static_data->offset += align - 1;
4122 static_data->offset &= ~(align - 1);
4123 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4124 static_data->idx ++;
4125 g_assert (size <= static_data_size [static_data->idx]);
4126 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4127 static_data->offset = 0;
4129 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4130 static_data->offset += size;
4135 * LOCKING: requires that threads_mutex is held
4138 context_adjust_static_data (MonoAppContext *ctx)
4140 if (context_static_info.offset || context_static_info.idx > 0) {
4141 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4142 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4143 ctx->data->static_data = ctx->static_data;
4148 * LOCKING: requires that threads_mutex is held
4151 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4153 MonoInternalThread *thread = (MonoInternalThread *)value;
4154 guint32 offset = GPOINTER_TO_UINT (user);
4156 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4160 * LOCKING: requires that threads_mutex is held
4163 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4165 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4170 guint32 offset = GPOINTER_TO_UINT (user);
4171 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4172 ctx->data->static_data = ctx->static_data;
4175 static StaticDataFreeList*
4176 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4178 StaticDataFreeList* prev = NULL;
4179 StaticDataFreeList* tmp = static_data->freelist;
4181 if (tmp->size == size) {
4183 prev->next = tmp->next;
4185 static_data->freelist = tmp->next;
4194 #if SIZEOF_VOID_P == 4
4201 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4203 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4205 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4206 MonoBitSet *rb = sets [idx];
4207 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4208 offset /= sizeof (uintptr_t);
4209 /* offset is now the bitmap offset */
4210 for (int i = 0; i < numbits; ++i) {
4211 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4212 mono_bitset_set_fast (rb, offset + i);
4217 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4219 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4220 MonoBitSet *rb = sets [idx];
4221 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4222 offset /= sizeof (uintptr_t);
4223 /* offset is now the bitmap offset */
4224 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4225 mono_bitset_clear_fast (rb, offset + i);
4229 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4231 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4233 StaticDataInfo *info;
4236 if (static_type == SPECIAL_STATIC_THREAD) {
4237 info = &thread_static_info;
4238 sets = thread_reference_bitmaps;
4240 info = &context_static_info;
4241 sets = context_reference_bitmaps;
4244 mono_threads_lock ();
4246 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4250 offset = item->offset;
4253 offset = mono_alloc_static_data_slot (info, size, align);
4256 update_reference_bitmap (sets, offset, bitmap, numbits);
4258 if (static_type == SPECIAL_STATIC_THREAD) {
4259 /* This can be called during startup */
4260 if (threads != NULL)
4261 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4263 if (contexts != NULL)
4264 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4266 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4269 mono_threads_unlock ();
4275 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4277 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4279 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4280 return get_thread_static_data (thread, offset);
4282 return get_context_static_data (thread->current_appcontext, offset);
4287 mono_get_special_static_data (guint32 offset)
4289 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4298 * LOCKING: requires that threads_mutex is held
4301 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4303 MonoInternalThread *thread = (MonoInternalThread *)value;
4304 OffsetSize *data = (OffsetSize *)user;
4305 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4306 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4309 if (!thread->static_data || !thread->static_data [idx])
4311 ptr = ((char*) thread->static_data [idx]) + off;
4312 mono_gc_bzero_atomic (ptr, data->size);
4316 * LOCKING: requires that threads_mutex is held
4319 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4321 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4326 OffsetSize *data = (OffsetSize *)user;
4327 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4328 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4331 if (!ctx->static_data || !ctx->static_data [idx])
4334 ptr = ((char*) ctx->static_data [idx]) + off;
4335 mono_gc_bzero_atomic (ptr, data->size);
4339 do_free_special_slot (guint32 offset, guint32 size)
4341 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4343 StaticDataInfo *info;
4345 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4346 info = &thread_static_info;
4347 sets = thread_reference_bitmaps;
4349 info = &context_static_info;
4350 sets = context_reference_bitmaps;
4353 guint32 data_offset = offset;
4354 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4355 OffsetSize data = { data_offset, size };
4357 clear_reference_bitmap (sets, data.offset, data.size);
4359 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4360 if (threads != NULL)
4361 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4363 if (contexts != NULL)
4364 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4367 if (!mono_runtime_is_shutting_down ()) {
4368 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4370 item->offset = offset;
4373 item->next = info->freelist;
4374 info->freelist = item;
4379 do_free_special (gpointer key, gpointer value, gpointer data)
4381 MonoClassField *field = (MonoClassField *)key;
4382 guint32 offset = GPOINTER_TO_UINT (value);
4385 size = mono_type_size (field->type, &align);
4386 do_free_special_slot (offset, size);
4390 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4392 mono_threads_lock ();
4394 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4396 mono_threads_unlock ();
4400 static void CALLBACK dummy_apc (ULONG_PTR param)
4406 * mono_thread_execute_interruption
4408 * Performs the operation that the requested thread state requires (abort,
4411 static MonoException*
4412 mono_thread_execute_interruption (void)
4414 MonoInternalThread *thread = mono_thread_internal_current ();
4415 MonoThread *sys_thread = mono_thread_current ();
4417 LOCK_THREAD (thread);
4419 /* MonoThread::interruption_requested can only be changed with atomics */
4420 if (mono_thread_clear_interruption_requested (thread)) {
4421 /* this will consume pending APC calls */
4423 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4425 /* Clear the interrupted flag of the thread so it can wait again */
4426 mono_thread_info_clear_self_interrupt ();
4429 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4430 if (sys_thread->pending_exception) {
4433 exc = sys_thread->pending_exception;
4434 sys_thread->pending_exception = NULL;
4436 UNLOCK_THREAD (thread);
4438 } else if (thread->state & (ThreadState_AbortRequested)) {
4439 UNLOCK_THREAD (thread);
4440 g_assert (sys_thread->pending_exception == NULL);
4441 if (thread->abort_exc == NULL) {
4443 * This might be racy, but it has to be called outside the lock
4444 * since it calls managed code.
4446 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4448 return thread->abort_exc;
4449 } else if (thread->state & (ThreadState_SuspendRequested)) {
4450 /* calls UNLOCK_THREAD (thread) */
4451 self_suspend_internal ();
4453 } else if (thread->thread_interrupt_requested) {
4455 thread->thread_interrupt_requested = FALSE;
4456 UNLOCK_THREAD (thread);
4458 return(mono_get_exception_thread_interrupted ());
4461 UNLOCK_THREAD (thread);
4467 * mono_thread_request_interruption
4469 * A signal handler can call this method to request the interruption of a
4470 * thread. The result of the interruption will depend on the current state of
4471 * the thread. If the result is an exception that needs to be throw, it is
4472 * provided as return value.
4475 mono_thread_request_interruption (gboolean running_managed)
4477 MonoInternalThread *thread = mono_thread_internal_current ();
4479 /* The thread may already be stopping */
4483 if (!mono_thread_set_interruption_requested (thread))
4486 if (!running_managed || is_running_protected_wrapper ()) {
4487 /* Can't stop while in unmanaged code. Increase the global interruption
4488 request count. When exiting the unmanaged method the count will be
4489 checked and the thread will be interrupted. */
4491 /* this will awake the thread if it is in WaitForSingleObject
4493 /* Our implementation of this function ignores the func argument */
4495 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4497 mono_thread_info_self_interrupt ();
4502 return mono_thread_execute_interruption ();
4506 /*This function should be called by a thread after it has exited all of
4507 * its handle blocks at interruption time.*/
4509 mono_thread_resume_interruption (gboolean exec)
4511 MonoInternalThread *thread = mono_thread_internal_current ();
4512 gboolean still_aborting;
4514 /* The thread may already be stopping */
4518 LOCK_THREAD (thread);
4519 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4520 UNLOCK_THREAD (thread);
4522 /*This can happen if the protected block called Thread::ResetAbort*/
4523 if (!still_aborting)
4526 if (!mono_thread_set_interruption_requested (thread))
4529 mono_thread_info_self_interrupt ();
4532 return mono_thread_execute_interruption ();
4537 gboolean mono_thread_interruption_requested ()
4539 if (thread_interruption_requested) {
4540 MonoInternalThread *thread = mono_thread_internal_current ();
4541 /* The thread may already be stopping */
4543 return mono_thread_get_interruption_requested (thread);
4548 static MonoException*
4549 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4551 MonoInternalThread *thread = mono_thread_internal_current ();
4553 /* The thread may already be stopping */
4556 if (!mono_thread_get_interruption_requested (thread))
4558 if (!bypass_abort_protection && is_running_protected_wrapper ())
4561 return mono_thread_execute_interruption ();
4565 * Performs the interruption of the current thread, if one has been requested,
4566 * and the thread is not running a protected wrapper.
4567 * Return the exception which needs to be thrown, if any.
4570 mono_thread_interruption_checkpoint (void)
4572 return mono_thread_interruption_checkpoint_request (FALSE);
4576 * Performs the interruption of the current thread, if one has been requested.
4577 * Return the exception which needs to be thrown, if any.
4580 mono_thread_force_interruption_checkpoint_noraise (void)
4582 return mono_thread_interruption_checkpoint_request (TRUE);
4586 * mono_set_pending_exception:
4588 * Set the pending exception of the current thread to EXC.
4589 * The exception will be thrown when execution returns to managed code.
4592 mono_set_pending_exception (MonoException *exc)
4594 MonoThread *thread = mono_thread_current ();
4596 /* The thread may already be stopping */
4600 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4602 mono_thread_request_interruption (FALSE);
4606 * mono_thread_interruption_request_flag:
4608 * Returns the address of a flag that will be non-zero if an interruption has
4609 * been requested for a thread. The thread to interrupt may not be the current
4610 * thread, so an additional call to mono_thread_interruption_requested() or
4611 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4614 gint32* mono_thread_interruption_request_flag ()
4616 return &thread_interruption_requested;
4620 mono_thread_init_apartment_state (void)
4623 MonoInternalThread* thread = mono_thread_internal_current ();
4625 /* Positive return value indicates success, either
4626 * S_OK if this is first CoInitialize call, or
4627 * S_FALSE if CoInitialize already called, but with same
4628 * threading model. A negative value indicates failure,
4629 * probably due to trying to change the threading model.
4631 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4632 ? COINIT_APARTMENTTHREADED
4633 : COINIT_MULTITHREADED) < 0) {
4634 thread->apartment_state = ThreadApartmentState_Unknown;
4640 mono_thread_cleanup_apartment_state (void)
4643 MonoInternalThread* thread = mono_thread_internal_current ();
4645 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4652 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4654 LOCK_THREAD (thread);
4655 thread->state |= state;
4656 UNLOCK_THREAD (thread);
4660 * mono_thread_test_and_set_state:
4661 * Test if current state of \p thread include \p test. If it does not, OR \p set into the state.
4662 * \returns TRUE if \p set was OR'd in.
4665 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4667 LOCK_THREAD (thread);
4669 if ((thread->state & test) != 0) {
4670 UNLOCK_THREAD (thread);
4674 thread->state |= set;
4675 UNLOCK_THREAD (thread);
4681 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4683 LOCK_THREAD (thread);
4684 thread->state &= ~state;
4685 UNLOCK_THREAD (thread);
4689 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4691 gboolean ret = FALSE;
4693 LOCK_THREAD (thread);
4695 if ((thread->state & test) != 0) {
4699 UNLOCK_THREAD (thread);
4705 self_interrupt_thread (void *_unused)
4708 MonoThreadInfo *info;
4710 exc = mono_thread_execute_interruption ();
4712 if (mono_threads_is_coop_enabled ()) {
4713 /* We can return from an async call in coop, as
4714 * it's simply called when exiting the safepoint */
4718 g_error ("%s: we can't resume from an async call", __func__);
4721 info = mono_thread_info_current ();
4723 /* We must use _with_context since we didn't trampoline into the runtime */
4724 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. */
4728 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4732 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4736 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4738 MonoJitInfo **dest = (MonoJitInfo **)data;
4744 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4746 MonoJitInfo *ji = NULL;
4751 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4752 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4753 * where we hold runtime locks.
4755 if (!mono_threads_is_coop_enabled ())
4756 mono_thread_info_set_is_async_context (TRUE);
4757 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4758 if (!mono_threads_is_coop_enabled ())
4759 mono_thread_info_set_is_async_context (FALSE);
4764 MonoInternalThread *thread;
4765 gboolean install_async_abort;
4766 MonoThreadInfoInterruptToken *interrupt_token;
4769 static SuspendThreadResult
4770 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4772 AbortThreadData *data = (AbortThreadData *)ud;
4773 MonoInternalThread *thread = data->thread;
4774 MonoJitInfo *ji = NULL;
4775 gboolean protected_wrapper;
4776 gboolean running_managed;
4778 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4779 return MonoResumeThread;
4781 /*someone is already interrupting it*/
4782 if (!mono_thread_set_interruption_requested (thread))
4783 return MonoResumeThread;
4785 ji = mono_thread_info_get_last_managed (info);
4786 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4787 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4789 if (!protected_wrapper && running_managed) {
4790 /*We are in managed code*/
4791 /*Set the thread to call */
4792 if (data->install_async_abort)
4793 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4794 return MonoResumeThread;
4797 * This will cause waits to be broken.
4798 * It will also prevent the thread from entering a wait, so if the thread returns
4799 * from the wait before it receives the abort signal, it will just spin in the wait
4800 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4803 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4805 return MonoResumeThread;
4810 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4812 AbortThreadData data;
4814 g_assert (thread != mono_thread_internal_current ());
4816 data.thread = thread;
4817 data.install_async_abort = install_async_abort;
4818 data.interrupt_token = NULL;
4820 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4821 if (data.interrupt_token)
4822 mono_thread_info_finish_interrupt (data.interrupt_token);
4823 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4827 self_abort_internal (MonoError *error)
4833 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4834 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4837 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.
4839 exc = mono_thread_request_interruption (TRUE);
4841 mono_error_set_exception_instance (error, exc);
4843 mono_thread_info_self_interrupt ();
4847 MonoInternalThread *thread;
4849 MonoThreadInfoInterruptToken *interrupt_token;
4850 } SuspendThreadData;
4852 static SuspendThreadResult
4853 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4855 SuspendThreadData *data = (SuspendThreadData *)ud;
4856 MonoInternalThread *thread = data->thread;
4857 MonoJitInfo *ji = NULL;
4858 gboolean protected_wrapper;
4859 gboolean running_managed;
4861 ji = mono_thread_info_get_last_managed (info);
4862 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4863 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4865 if (running_managed && !protected_wrapper) {
4866 if (mono_threads_is_coop_enabled ()) {
4867 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4868 return MonoResumeThread;
4870 thread->state &= ~ThreadState_SuspendRequested;
4871 thread->state |= ThreadState_Suspended;
4872 return KeepSuspended;
4875 mono_thread_set_interruption_requested (thread);
4876 if (data->interrupt)
4877 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4879 return MonoResumeThread;
4883 /* LOCKING: called with @thread synch_cs held, and releases it */
4885 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4887 SuspendThreadData data;
4889 g_assert (thread != mono_thread_internal_current ());
4891 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4893 thread->self_suspended = FALSE;
4895 data.thread = thread;
4896 data.interrupt = interrupt;
4897 data.interrupt_token = NULL;
4899 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4900 if (data.interrupt_token)
4901 mono_thread_info_finish_interrupt (data.interrupt_token);
4903 UNLOCK_THREAD (thread);
4906 /* LOCKING: called with @thread synch_cs held, and releases it */
4908 self_suspend_internal (void)
4910 MonoInternalThread *thread;
4912 MonoOSEventWaitRet res;
4914 thread = mono_thread_internal_current ();
4916 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4918 thread->self_suspended = TRUE;
4920 thread->state &= ~ThreadState_SuspendRequested;
4921 thread->state |= ThreadState_Suspended;
4923 UNLOCK_THREAD (thread);
4925 event = thread->suspended;
4928 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4929 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4934 suspend_for_shutdown_async_call (gpointer unused)
4937 mono_thread_info_yield ();
4940 static SuspendThreadResult
4941 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4943 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4944 return MonoResumeThread;
4948 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4950 g_assert (thread != mono_thread_internal_current ());
4952 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4956 * mono_thread_is_foreign:
4957 * \param thread the thread to query
4959 * This function allows one to determine if a thread was created by the mono runtime and has
4960 * a well defined lifecycle or it's a foreign one, created by the native environment.
4962 * \returns TRUE if \p thread was not created by the runtime.
4965 mono_thread_is_foreign (MonoThread *thread)
4967 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4968 return info->runtime_thread == FALSE;
4972 * mono_add_joinable_thread:
4974 * Add TID to the list of joinable threads.
4975 * LOCKING: Acquires the threads lock.
4978 mono_threads_add_joinable_thread (gpointer tid)
4982 * We cannot detach from threads because it causes problems like
4983 * 2fd16f60/r114307. So we collect them and join them when
4984 * we have time (in he finalizer thread).
4986 joinable_threads_lock ();
4987 if (!joinable_threads)
4988 joinable_threads = g_hash_table_new (NULL, NULL);
4989 g_hash_table_insert (joinable_threads, tid, tid);
4990 joinable_thread_count ++;
4991 joinable_threads_unlock ();
4993 mono_gc_finalize_notify ();
4998 * mono_threads_join_threads:
5000 * Join all joinable threads. This is called from the finalizer thread.
5001 * LOCKING: Acquires the threads lock.
5004 mono_threads_join_threads (void)
5007 GHashTableIter iter;
5014 if (!joinable_thread_count)
5018 joinable_threads_lock ();
5020 if (g_hash_table_size (joinable_threads)) {
5021 g_hash_table_iter_init (&iter, joinable_threads);
5022 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5023 thread = (pthread_t)tid;
5024 g_hash_table_remove (joinable_threads, key);
5025 joinable_thread_count --;
5028 joinable_threads_unlock ();
5030 if (thread != pthread_self ()) {
5032 /* This shouldn't block */
5033 mono_threads_join_lock ();
5034 mono_native_thread_join (thread);
5035 mono_threads_join_unlock ();
5048 * Wait for thread TID to exit.
5049 * LOCKING: Acquires the threads lock.
5052 mono_thread_join (gpointer tid)
5056 gboolean found = FALSE;
5058 joinable_threads_lock ();
5059 if (!joinable_threads)
5060 joinable_threads = g_hash_table_new (NULL, NULL);
5061 if (g_hash_table_lookup (joinable_threads, tid)) {
5062 g_hash_table_remove (joinable_threads, tid);
5063 joinable_thread_count --;
5066 joinable_threads_unlock ();
5069 thread = (pthread_t)tid;
5071 mono_native_thread_join (thread);
5077 mono_thread_internal_unhandled_exception (MonoObject* exc)
5079 MonoClass *klass = exc->vtable->klass;
5080 if (is_threadabort_exception (klass)) {
5081 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5082 } else if (!is_appdomainunloaded_exception (klass)
5083 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5084 mono_unhandled_exception (exc);
5085 if (mono_environment_exitcode_get () == 1) {
5086 mono_environment_exitcode_set (255);
5087 mono_invoke_unhandled_exception_hook (exc);
5088 g_assert_not_reached ();
5094 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5097 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5098 mono_error_set_pending_exception (&error);
5102 * mono_threads_attach_coop: called by native->managed wrappers
5106 * - @return: the original domain which needs to be restored, or NULL.
5109 * - @dummy: contains the original domain
5110 * - @return: a cookie containing current MonoThreadInfo*.
5113 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5116 gboolean fresh_thread = FALSE;
5119 /* Happens when called from AOTed code which is only used in the root domain. */
5120 domain = mono_get_root_domain ();
5125 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5126 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5127 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5128 * we're only responsible for making the cookie. */
5129 if (mono_threads_is_coop_enabled ()) {
5130 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5131 fresh_thread = !info || !mono_thread_info_is_live (info);
5134 if (!mono_thread_internal_current ()) {
5135 mono_thread_attach_full (domain, FALSE);
5138 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5141 orig = mono_domain_get ();
5143 mono_domain_set (domain, TRUE);
5145 if (!mono_threads_is_coop_enabled ())
5146 return orig != domain ? orig : NULL;
5150 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5151 * return the right cookie. */
5152 return mono_threads_enter_gc_unsafe_region_cookie ();
5155 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5156 return mono_threads_enter_gc_unsafe_region (dummy);
5161 * mono_threads_detach_coop: called by native->managed wrappers
5164 * - @cookie: the original domain which needs to be restored, or NULL.
5168 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5169 * - @dummy: contains the original domain
5172 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5174 MonoDomain *domain, *orig;
5176 if (!mono_threads_is_coop_enabled ()) {
5177 orig = (MonoDomain*) cookie;
5179 mono_domain_set (orig, TRUE);
5181 orig = (MonoDomain*) *dummy;
5183 domain = mono_domain_get ();
5186 /* it won't do anything if cookie is NULL
5187 * thread state RUNNING -> (RUNNING|BLOCKING) */
5188 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5190 if (orig != domain) {
5192 mono_domain_unset ();
5194 mono_domain_set (orig, TRUE);
5200 /* Returns TRUE if the current thread is ready to be interrupted. */
5202 mono_threads_is_ready_to_be_interrupted (void)
5204 MonoInternalThread *thread;
5206 thread = mono_thread_internal_current ();
5207 LOCK_THREAD (thread);
5208 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5209 UNLOCK_THREAD (thread);
5213 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5214 UNLOCK_THREAD (thread);
5218 UNLOCK_THREAD (thread);
5224 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5226 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5228 if (internal->thread_info) {
5229 g_string_append (text, ", state : ");
5230 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5233 if (internal->owned_mutexes) {
5236 g_string_append (text, ", owns : [");
5237 for (i = 0; i < internal->owned_mutexes->len; i++)
5238 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5239 g_string_append (text, "]");
5244 mono_thread_internal_is_current (MonoInternalThread *internal)
5246 g_assert (internal);
5247 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));