3 * Thread support internal calls
6 * Dick Porter (dick@ximian.com)
7 * Paolo Molaro (lupus@ximian.com)
8 * Patrik Torstensson (patrik.torstensson@labs2.com)
10 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
11 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
12 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
13 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
21 #include <mono/metadata/object.h>
22 #include <mono/metadata/domain-internals.h>
23 #include <mono/metadata/profiler-private.h>
24 #include <mono/metadata/threads.h>
25 #include <mono/metadata/threads-types.h>
26 #include <mono/metadata/exception.h>
27 #include <mono/metadata/environment.h>
28 #include <mono/metadata/monitor.h>
29 #include <mono/metadata/gc-internals.h>
30 #include <mono/metadata/marshal.h>
31 #include <mono/metadata/runtime.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/debug-internals.h>
34 #include <mono/utils/monobitset.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/mono-threads-coop.h>
41 #include <mono/utils/hazard-pointer.h>
42 #include <mono/utils/mono-tls.h>
43 #include <mono/utils/atomic.h>
44 #include <mono/utils/mono-memory-model.h>
45 #include <mono/utils/mono-error-internals.h>
46 #include <mono/utils/os-event.h>
47 #include <mono/utils/mono-threads-debug.h>
48 #include <mono/metadata/w32handle.h>
49 #include <mono/metadata/w32event.h>
50 #include <mono/metadata/w32mutex.h>
52 #include <mono/metadata/reflection-internals.h>
53 #include <mono/metadata/abi-details.h>
54 #include <mono/metadata/w32error.h>
55 #include <mono/utils/w32api.h>
61 #if defined(HOST_WIN32)
65 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
66 #define USE_TKILL_ON_ANDROID 1
69 #ifdef PLATFORM_ANDROID
72 #ifdef USE_TKILL_ON_ANDROID
73 extern int tkill (pid_t tid, int signal);
77 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
78 #define THREAD_DEBUG(a)
79 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
80 #define THREAD_WAIT_DEBUG(a)
81 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
82 #define LIBGC_DEBUG(a)
84 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
85 #define SPIN_LOCK(i) do { \
86 if (SPIN_TRYLOCK (i)) \
90 #define SPIN_UNLOCK(i) i = 0
92 #define LOCK_THREAD(thread) lock_thread((thread))
93 #define UNLOCK_THREAD(thread) unlock_thread((thread))
105 typedef struct _StaticDataFreeList StaticDataFreeList;
106 struct _StaticDataFreeList {
107 StaticDataFreeList *next;
115 StaticDataFreeList *freelist;
118 /* Controls access to the 'threads' hash table */
119 static void mono_threads_lock (void);
120 static void mono_threads_unlock (void);
121 static MonoCoopMutex threads_mutex;
123 /* Controls access to the 'joinable_threads' hash table */
124 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
125 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
126 static mono_mutex_t joinable_threads_mutex;
128 /* Holds current status of static data heap */
129 static StaticDataInfo thread_static_info;
130 static StaticDataInfo context_static_info;
132 /* The hash of existing threads (key is thread ID, value is
133 * MonoInternalThread*) that need joining before exit
135 static MonoGHashTable *threads=NULL;
137 /* List of app context GC handles.
138 * Added to from ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext ().
140 static GHashTable *contexts = NULL;
142 /* Cleanup queue for contexts. */
143 static MonoReferenceQueue *context_queue;
146 * Threads which are starting up and they are not in the 'threads' hash yet.
147 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
148 * Protected by mono_threads_lock ().
150 static MonoGHashTable *threads_starting_up = NULL;
153 /* Protected by the threads lock */
154 static GHashTable *joinable_threads;
155 static int joinable_thread_count;
157 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
158 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
160 /* function called at thread start */
161 static MonoThreadStartCB mono_thread_start_cb = NULL;
163 /* function called at thread attach */
164 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
166 /* function called at thread cleanup */
167 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
169 /* The default stack size for each thread */
170 static guint32 default_stacksize = 0;
171 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
173 static void context_adjust_static_data (MonoAppContext *ctx);
174 static void mono_free_static_data (gpointer* static_data);
175 static void mono_init_static_data_info (StaticDataInfo *static_data);
176 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
177 static gboolean mono_thread_resume (MonoInternalThread* thread);
178 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
179 static void self_abort_internal (MonoError *error);
180 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
181 static void self_suspend_internal (void);
183 static MonoException* mono_thread_execute_interruption (void);
184 static void ref_stack_destroy (gpointer rs);
186 /* Spin lock for InterlockedXXX 64 bit functions */
187 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
188 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
189 static mono_mutex_t interlocked_mutex;
191 /* global count of thread interruptions requested */
192 static gint32 thread_interruption_requested = 0;
194 /* Event signaled when a thread changes its background mode */
195 static MonoOSEvent background_change_event;
197 static gboolean shutting_down = FALSE;
199 static gint32 managed_thread_id_counter = 0;
201 /* Class lazy loading functions */
202 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, "System", "AppDomainUnloadedException")
205 mono_threads_lock (void)
207 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
211 mono_threads_unlock (void)
213 mono_locks_coop_release (&threads_mutex, ThreadsLock);
218 get_next_managed_thread_id (void)
220 return InterlockedIncrement (&managed_thread_id_counter);
224 * We separate interruptions/exceptions into either sync (they can be processed anytime,
225 * normally as soon as they are set, and are set by the same thread) and async (they can't
226 * be processed inside abort protected blocks and are normally set by other threads). We
227 * can have both a pending sync and async interruption. In this case, the sync exception is
228 * processed first. Since we clean sync flag first, mono_thread_execute_interruption must
229 * also handle all sync type exceptions before the async type exceptions.
232 INTERRUPT_SYNC_REQUESTED_BIT = 0x1,
233 INTERRUPT_ASYNC_REQUESTED_BIT = 0x2,
234 INTERRUPT_REQUESTED_MASK = 0x3,
235 ABORT_PROT_BLOCK_SHIFT = 2,
236 ABORT_PROT_BLOCK_BITS = 8,
237 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
241 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
243 gsize state = thread->thread_state;
244 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
248 mono_threads_begin_abort_protected_block (void)
250 MonoInternalThread *thread = mono_thread_internal_current ();
251 gsize old_state, new_state;
254 old_state = thread->thread_state;
256 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
257 //bounds check abort_prot_count
258 g_assert (new_val > 0);
259 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
261 new_state = old_state + (1 << ABORT_PROT_BLOCK_SHIFT);
262 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
264 /* Defer async request since we won't be able to process until exiting the block */
265 if (new_val == 1 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
266 InterlockedDecrement (&thread_interruption_requested);
267 THREADS_INTERRUPT_DEBUG ("[%d] begin abort protected block old_state %ld new_state %ld, defer tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
268 if (thread_interruption_requested < 0)
269 g_warning ("bad thread_interruption_requested state");
271 THREADS_INTERRUPT_DEBUG ("[%d] begin abort protected block old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
276 mono_thread_state_has_interruption (gsize state)
278 /* pending exception, self abort */
279 if (state & INTERRUPT_SYNC_REQUESTED_BIT)
282 /* abort, interruption, suspend */
283 if ((state & INTERRUPT_ASYNC_REQUESTED_BIT) && !(state & ABORT_PROT_BLOCK_MASK))
290 mono_threads_end_abort_protected_block (void)
292 MonoInternalThread *thread = mono_thread_internal_current ();
293 gsize old_state, new_state;
296 old_state = thread->thread_state;
298 //bounds check abort_prot_count
299 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
300 g_assert (new_val >= 0);
301 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
303 new_state = old_state - (1 << ABORT_PROT_BLOCK_SHIFT);
304 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
306 if (new_val == 0 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
307 InterlockedIncrement (&thread_interruption_requested);
308 THREADS_INTERRUPT_DEBUG ("[%d] end abort protected block old_state %ld new_state %ld, restore tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
310 THREADS_INTERRUPT_DEBUG ("[%d] end abort protected block old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
313 return mono_thread_state_has_interruption (new_state);
317 mono_thread_get_interruption_requested (MonoInternalThread *thread)
319 gsize state = thread->thread_state;
321 return mono_thread_state_has_interruption (state);
325 * Returns TRUE is there was a state change
326 * We clear a single interruption request, sync has priority.
329 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
331 gsize old_state, new_state;
333 old_state = thread->thread_state;
335 // no interruption to process
336 if (!(old_state & INTERRUPT_SYNC_REQUESTED_BIT) &&
337 (!(old_state & INTERRUPT_ASYNC_REQUESTED_BIT) || (old_state & ABORT_PROT_BLOCK_MASK)))
340 if (old_state & INTERRUPT_SYNC_REQUESTED_BIT)
341 new_state = old_state & ~INTERRUPT_SYNC_REQUESTED_BIT;
343 new_state = old_state & ~INTERRUPT_ASYNC_REQUESTED_BIT;
344 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
346 InterlockedDecrement (&thread_interruption_requested);
347 THREADS_INTERRUPT_DEBUG ("[%d] clear interruption old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
348 if (thread_interruption_requested < 0)
349 g_warning ("bad thread_interruption_requested state");
353 /* Returns TRUE is there was a state change and the interruption can be processed */
355 mono_thread_set_interruption_requested (MonoInternalThread *thread)
357 //always force when the current thread is doing it to itself.
358 gboolean sync = thread == mono_thread_internal_current ();
359 gsize old_state, new_state;
361 old_state = thread->thread_state;
364 if ((sync && (old_state & INTERRUPT_SYNC_REQUESTED_BIT)) ||
365 (!sync && (old_state & INTERRUPT_ASYNC_REQUESTED_BIT)))
369 new_state = old_state | INTERRUPT_SYNC_REQUESTED_BIT;
371 new_state = old_state | INTERRUPT_ASYNC_REQUESTED_BIT;
372 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
374 if (sync || !(new_state & ABORT_PROT_BLOCK_MASK)) {
375 InterlockedIncrement (&thread_interruption_requested);
376 THREADS_INTERRUPT_DEBUG ("[%d] set interruption on [%d] old_state %ld new_state %ld, tir %d\n", mono_thread_internal_current ()->small_id, thread->small_id, old_state, new_state, thread_interruption_requested);
378 THREADS_INTERRUPT_DEBUG ("[%d] set interruption on [%d] old_state %ld new_state %ld, tir deferred %d\n", mono_thread_internal_current ()->small_id, thread->small_id, old_state, new_state, thread_interruption_requested);
381 return sync || !(new_state & ABORT_PROT_BLOCK_MASK);
384 static inline MonoNativeThreadId
385 thread_get_tid (MonoInternalThread *thread)
387 /* We store the tid as a guint64 to keep the object layout constant between platforms */
388 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
391 static void ensure_synch_cs_set (MonoInternalThread *thread)
393 MonoCoopMutex *synch_cs;
395 if (thread->synch_cs != NULL) {
399 synch_cs = g_new0 (MonoCoopMutex, 1);
400 mono_coop_mutex_init_recursive (synch_cs);
402 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
403 synch_cs, NULL) != NULL) {
404 /* Another thread must have installed this CS */
405 mono_coop_mutex_destroy (synch_cs);
411 lock_thread (MonoInternalThread *thread)
413 if (!thread->synch_cs)
414 ensure_synch_cs_set (thread);
416 g_assert (thread->synch_cs);
418 mono_coop_mutex_lock (thread->synch_cs);
422 unlock_thread (MonoInternalThread *thread)
424 mono_coop_mutex_unlock (thread->synch_cs);
427 static inline gboolean
428 is_appdomainunloaded_exception (MonoClass *klass)
430 return klass == mono_class_get_appdomain_unloaded_exception_class ();
433 static inline gboolean
434 is_threadabort_exception (MonoClass *klass)
436 return klass == mono_defaults.threadabortexception_class;
440 * A special static data offset (guint32) consists of 3 parts:
442 * [0] 6-bit index into the array of chunks.
443 * [6] 25-bit offset into the array.
444 * [31] Bit indicating thread or context static.
449 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
460 } SpecialStaticOffset;
462 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
463 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
465 #define MAKE_SPECIAL_STATIC_OFFSET(index, offset, type) \
466 ((SpecialStaticOffset) { .fields = { (index), (offset), (type) } }.raw)
467 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
468 (((SpecialStaticOffset *) &(x))->fields.f)
471 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
473 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
475 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
476 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
478 return ((char *) thread->static_data [idx]) + off;
482 get_context_static_data (MonoAppContext *ctx, guint32 offset)
484 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
486 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
487 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
489 return ((char *) ctx->static_data [idx]) + off;
493 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
495 static MonoClassField *current_thread_field = NULL;
499 if (!current_thread_field) {
500 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
501 g_assert (current_thread_field);
504 mono_class_vtable (domain, mono_defaults.thread_class);
505 mono_domain_lock (domain);
506 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
507 mono_domain_unlock (domain);
510 return (MonoThread **)get_thread_static_data (thread, offset);
514 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
516 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
518 g_assert (current->obj.vtable->domain == domain);
520 g_assert (!*current_thread_ptr);
521 *current_thread_ptr = current;
525 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
531 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
534 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
535 /* only possible failure mode is OOM, from which we don't expect to recover. */
536 mono_error_assert_ok (&error);
538 MONO_OBJECT_SETREF (thread, internal_thread, internal);
543 static MonoInternalThread*
544 create_internal_thread_object (void)
547 MonoInternalThread *thread;
550 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
551 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
552 /* only possible failure mode is OOM, from which we don't exect to recover */
553 mono_error_assert_ok (&error);
555 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
556 mono_coop_mutex_init_recursive (thread->synch_cs);
558 thread->apartment_state = ThreadApartmentState_Unknown;
559 thread->managed_id = get_next_managed_thread_id ();
560 if (mono_gc_is_moving ()) {
561 thread->thread_pinning_ref = thread;
562 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
565 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
567 thread->suspended = g_new0 (MonoOSEvent, 1);
568 mono_os_event_init (thread->suspended, TRUE);
574 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
578 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
579 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
580 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
585 g_assert (internal->native_handle);
587 res = SetThreadPriority (internal->native_handle, priority - 2);
589 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
590 #else /* HOST_WIN32 */
593 struct sched_param param;
596 tid = thread_get_tid (internal);
598 res = pthread_getschedparam (tid, &policy, ¶m);
600 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
602 #ifdef _POSIX_PRIORITY_SCHEDULING
605 /* Necessary to get valid priority range */
607 min = sched_get_priority_min (policy);
608 max = sched_get_priority_max (policy);
610 if (max > 0 && min >= 0 && max > min) {
611 double srange, drange, sposition, dposition;
612 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
614 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
615 dposition = (sposition / srange) * drange;
616 param.sched_priority = (int)(dposition + min);
623 param.sched_priority = 50;
629 param.sched_priority = 0;
632 g_warning ("%s: unknown policy %d", __func__, policy);
637 res = pthread_setschedparam (tid, policy, ¶m);
640 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
643 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
645 #endif /* HOST_WIN32 */
649 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
652 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain)
654 MonoThreadInfo *info;
655 MonoInternalThread *internal;
656 MonoDomain *domain, *root_domain;
660 info = mono_thread_info_current ();
662 internal = thread->internal_thread;
663 internal->handle = mono_threads_open_thread_handle (info->handle);
665 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
667 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
668 internal->thread_info = info;
669 internal->small_id = info->small_id;
671 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
673 SET_CURRENT_OBJECT (internal);
675 domain = mono_object_domain (thread);
677 mono_thread_push_appdomain_ref (domain);
678 if (!mono_domain_set (domain, force_domain)) {
679 mono_thread_pop_appdomain_ref ();
683 mono_threads_lock ();
685 if (threads_starting_up)
686 mono_g_hash_table_remove (threads_starting_up, thread);
688 if (shutting_down && !force_attach) {
689 mono_threads_unlock ();
690 mono_thread_pop_appdomain_ref ();
695 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
698 /* We don't need to duplicate thread->handle, because it is
699 * only closed when the thread object is finalized by the GC. */
700 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
702 /* We have to do this here because mono_thread_start_cb
703 * requires that root_domain_thread is set up. */
704 if (thread_static_info.offset || thread_static_info.idx > 0) {
705 /* get the current allocated size */
706 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
707 mono_alloc_static_data (&internal->static_data, offset, TRUE);
710 mono_threads_unlock ();
712 root_domain = mono_get_root_domain ();
714 g_assert (!internal->root_domain_thread);
715 if (domain != root_domain)
716 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
718 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
720 if (domain != root_domain)
721 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
723 set_current_thread_for_domain (domain, internal, thread);
725 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
733 MonoObject *start_delegate;
734 MonoObject *start_delegate_arg;
735 MonoThreadStart start_func;
736 gpointer start_func_arg;
737 gboolean force_attach;
739 MonoCoopSem registered;
742 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
745 MonoThreadStart start_func;
746 void *start_func_arg;
749 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
753 MonoInternalThread *internal;
754 MonoObject *start_delegate;
755 MonoObject *start_delegate_arg;
758 thread = start_info->thread;
759 internal = thread->internal_thread;
760 domain = mono_object_domain (start_info->thread);
762 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
764 if (!mono_thread_attach_internal (thread, start_info->force_attach, FALSE)) {
765 start_info->failed = TRUE;
767 mono_coop_sem_post (&start_info->registered);
769 if (InterlockedDecrement (&start_info->ref) == 0) {
770 mono_coop_sem_destroy (&start_info->registered);
777 mono_thread_internal_set_priority (internal, internal->priority);
781 start_delegate = start_info->start_delegate;
782 start_delegate_arg = start_info->start_delegate_arg;
783 start_func = start_info->start_func;
784 start_func_arg = start_info->start_func_arg;
786 /* This MUST be called before any managed code can be
787 * executed, as it calls the callback function that (for the
788 * jit) sets the lmf marker.
791 if (mono_thread_start_cb)
792 mono_thread_start_cb (tid, stack_ptr, start_func);
794 /* On 2.0 profile (and higher), set explicitly since state might have been
796 if (internal->apartment_state == ThreadApartmentState_Unknown)
797 internal->apartment_state = ThreadApartmentState_MTA;
799 mono_thread_init_apartment_state ();
801 /* Let the thread that called Start() know we're ready */
802 mono_coop_sem_post (&start_info->registered);
804 if (InterlockedDecrement (&start_info->ref) == 0) {
805 mono_coop_sem_destroy (&start_info->registered);
809 /* start_info is not valid anymore */
813 * Call this after calling start_notify, since the profiler callback might want
814 * to lock the thread, and the lock is held by thread_start () which waits for
817 mono_profiler_thread_start (tid);
819 /* if the name was set before starting, we didn't invoke the profiler callback */
820 if (internal->name) {
821 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
822 mono_profiler_thread_name (internal->tid, tname);
823 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
827 /* start_func is set only for unmanaged start functions */
829 start_func (start_func_arg);
833 g_assert (start_delegate != NULL);
835 /* we may want to handle the exception here. See comment below on unhandled exceptions */
836 args [0] = (gpointer) start_delegate_arg;
837 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
839 if (!mono_error_ok (&error)) {
840 MonoException *ex = mono_error_convert_to_exception (&error);
842 g_assert (ex != NULL);
843 MonoClass *klass = mono_object_get_class (&ex->object);
844 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
845 !is_threadabort_exception (klass)) {
846 mono_unhandled_exception (&ex->object);
847 mono_invoke_unhandled_exception_hook (&ex->object);
848 g_assert_not_reached ();
851 mono_error_cleanup (&error);
855 /* If the thread calls ExitThread at all, this remaining code
856 * will not be executed, but the main thread will eventually
857 * call mono_thread_detach_internal() on this thread's behalf.
860 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
862 /* Do any cleanup needed for apartment state. This
863 * cannot be done in mono_thread_detach_internal since
864 * mono_thread_detach_internal could be called for a
865 * thread other than the current thread.
866 * mono_thread_cleanup_apartment_state cleans up apartment
867 * for the current thead */
868 mono_thread_cleanup_apartment_state ();
870 mono_thread_detach_internal (internal);
878 start_wrapper (gpointer data)
880 StartInfo *start_info;
881 MonoThreadInfo *info;
884 start_info = (StartInfo*) data;
885 g_assert (start_info);
887 info = mono_thread_info_attach (&res);
888 info->runtime_thread = TRUE;
890 /* Run the actual main function of the thread */
891 res = start_wrapper_internal (start_info, &res);
893 mono_thread_info_exit (res);
895 g_assert_not_reached ();
901 * Common thread creation code.
902 * LOCKING: Acquires the threads lock.
905 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
906 MonoThreadCreateFlags flags, MonoError *error)
908 StartInfo *start_info = NULL;
909 MonoNativeThreadId tid;
911 gsize stack_set_size;
914 g_assert (!start_func && !start_func_arg);
916 g_assert (!start_delegate);
918 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
919 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
920 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
922 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
923 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
924 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
928 * Join joinable threads to prevent running out of threads since the finalizer
929 * thread might be blocked/backlogged.
931 mono_threads_join_threads ();
935 mono_threads_lock ();
936 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
937 mono_threads_unlock ();
940 if (threads_starting_up == NULL) {
941 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
943 mono_g_hash_table_insert (threads_starting_up, thread, thread);
944 mono_threads_unlock ();
946 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
947 if (internal->threadpool_thread)
948 mono_thread_set_state (internal, ThreadState_Background);
950 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
952 start_info = g_new0 (StartInfo, 1);
954 start_info->thread = thread;
955 start_info->start_delegate = start_delegate;
956 start_info->start_delegate_arg = thread->start_obj;
957 start_info->start_func = start_func;
958 start_info->start_func_arg = start_func_arg;
959 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
960 start_info->failed = FALSE;
961 mono_coop_sem_init (&start_info->registered, 0);
963 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
964 stack_set_size = default_stacksize_for_thread (internal);
968 if (!mono_thread_platform_create_thread (start_wrapper, start_info, &stack_set_size, &tid)) {
969 /* The thread couldn't be created, so set an exception */
970 mono_threads_lock ();
971 mono_g_hash_table_remove (threads_starting_up, thread);
972 mono_threads_unlock ();
973 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
974 /* ref is not going to be decremented in start_wrapper_internal */
975 InterlockedDecrement (&start_info->ref);
980 internal->stack_size = (int) stack_set_size;
982 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
985 * Wait for the thread to set up its TLS data etc, so
986 * theres no potential race condition if someone tries
987 * to look up the data believing the thread has
991 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
993 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
995 ret = !start_info->failed;
998 if (InterlockedDecrement (&start_info->ref) == 0) {
999 mono_coop_sem_destroy (&start_info->registered);
1000 g_free (start_info);
1006 void mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1008 if (mono_thread_start_cb) {
1009 mono_thread_start_cb (tid, stack_start, func);
1013 void mono_threads_set_default_stacksize (guint32 stacksize)
1015 default_stacksize = stacksize;
1018 guint32 mono_threads_get_default_stacksize (void)
1020 return default_stacksize;
1024 * mono_thread_create_internal:
1026 * ARG should not be a GC reference.
1029 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1032 MonoInternalThread *internal;
1037 internal = create_internal_thread_object ();
1039 thread = create_thread_object (domain, internal);
1041 LOCK_THREAD (internal);
1043 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1045 UNLOCK_THREAD (internal);
1047 return_val_if_nok (error, NULL);
1052 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1055 if (!mono_thread_create_checked (domain, func, arg, &error))
1056 mono_error_cleanup (&error);
1060 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1062 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1066 mono_thread_attach (MonoDomain *domain)
1068 MonoThread *thread = mono_thread_attach_full (domain, FALSE);
1074 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1076 MonoInternalThread *internal;
1078 MonoThreadInfo *info;
1079 MonoNativeThreadId tid;
1082 if (mono_thread_internal_current_is_attached ()) {
1083 if (domain != mono_domain_get ())
1084 mono_domain_set (domain, TRUE);
1085 /* Already attached */
1086 return mono_thread_current ();
1089 info = mono_thread_info_attach (&stack_ptr);
1092 tid=mono_native_thread_id_get ();
1094 internal = create_internal_thread_object ();
1096 thread = create_thread_object (domain, internal);
1098 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1099 /* Mono is shutting down, so just wait for the end */
1101 mono_thread_info_sleep (10000, NULL);
1104 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1106 if (mono_thread_attach_cb) {
1110 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1113 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), &stack_ptr);
1115 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), staddr + stsize);
1118 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1119 if (!mono_thread_info_current ()->tools_thread)
1120 // FIXME: Need a separate callback
1121 mono_profiler_thread_start (MONO_NATIVE_THREAD_ID_TO_UINT (tid));
1127 mono_thread_detach_internal (MonoInternalThread *thread)
1131 g_assert (thread != NULL);
1133 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1136 mono_w32mutex_abandon ();
1139 if (thread->abort_state_handle) {
1140 mono_gchandle_free (thread->abort_state_handle);
1141 thread->abort_state_handle = 0;
1144 thread->abort_exc = NULL;
1145 thread->current_appcontext = NULL;
1148 * thread->synch_cs can be NULL if this was called after
1149 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
1150 * This can happen only during shutdown.
1151 * The shutting_down flag is not always set, so we can't assert on it.
1153 if (thread->synch_cs)
1154 LOCK_THREAD (thread);
1156 thread->state |= ThreadState_Stopped;
1157 thread->state &= ~ThreadState_Background;
1159 if (thread->synch_cs)
1160 UNLOCK_THREAD (thread);
1163 An interruption request has leaked to cleanup. Adjust the global counter.
1165 This can happen is the abort source thread finds the abortee (this) thread
1166 in unmanaged code. If this thread never trips back to managed code or check
1167 the local flag it will be left set and positively unbalance the global counter.
1169 Leaving the counter unbalanced will cause a performance degradation since all threads
1170 will now keep checking their local flags all the time.
1172 mono_thread_clear_interruption_requested (thread);
1174 mono_threads_lock ();
1178 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
1179 /* We have to check whether the thread object for the
1180 * tid is still the same in the table because the
1181 * thread might have been destroyed and the tid reused
1182 * in the meantime, in which case the tid would be in
1183 * the table, but with another thread object.
1187 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
1191 mono_threads_unlock ();
1193 /* Don't close the handle here, wait for the object finalizer
1194 * to do it. Otherwise, the following race condition applies:
1196 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
1198 * 2) Some other handle is reassigned the same slot
1200 * 3) Another thread tries to join the first thread, and
1201 * blocks waiting for the reassigned handle to be signalled
1202 * (which might never happen). This is possible, because the
1203 * thread calling Join() still has a reference to the first
1207 /* if the thread is not in the hash it has been removed already */
1209 mono_domain_unset ();
1210 mono_memory_barrier ();
1212 if (mono_thread_cleanup_fn)
1213 mono_thread_cleanup_fn (thread_get_tid (thread));
1218 mono_release_type_locks (thread);
1220 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1221 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
1222 mono_profiler_thread_end (thread->tid);
1224 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
1227 * This will signal async signal handlers that the thread has exited.
1228 * The profiler callback needs this to be set, so it cannot be done earlier.
1230 mono_domain_unset ();
1231 mono_memory_barrier ();
1233 if (thread == mono_thread_internal_current ())
1234 mono_thread_pop_appdomain_ref ();
1236 mono_free_static_data (thread->static_data);
1237 thread->static_data = NULL;
1238 ref_stack_destroy (thread->appdomain_refs);
1239 thread->appdomain_refs = NULL;
1241 g_assert (thread->suspended);
1242 mono_os_event_destroy (thread->suspended);
1243 g_free (thread->suspended);
1244 thread->suspended = NULL;
1246 if (mono_thread_cleanup_fn)
1247 mono_thread_cleanup_fn (thread_get_tid (thread));
1249 mono_memory_barrier ();
1251 if (mono_gc_is_moving ()) {
1252 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
1253 thread->thread_pinning_ref = NULL;
1257 SET_CURRENT_OBJECT (NULL);
1258 mono_domain_unset ();
1260 /* Don't need to close the handle to this thread, even though we took a
1261 * reference in mono_thread_attach (), because the GC will do it
1262 * when the Thread object is finalised.
1267 mono_thread_detach (MonoThread *thread)
1270 mono_thread_detach_internal (thread->internal_thread);
1274 * mono_thread_detach_if_exiting:
1276 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1277 * This should be used at the end of embedding code which calls into managed code, and which
1278 * can be called from pthread dtors, like dealloc: implementations in objective-c.
1281 mono_thread_detach_if_exiting (void)
1283 if (mono_thread_info_is_exiting ()) {
1284 MonoInternalThread *thread;
1286 thread = mono_thread_internal_current ();
1288 mono_thread_detach_internal (thread);
1289 mono_thread_info_detach ();
1297 mono_thread_internal_current_is_attached (void)
1299 MonoInternalThread *internal;
1301 internal = GET_CURRENT_OBJECT ();
1309 mono_thread_exit (void)
1311 MonoInternalThread *thread = mono_thread_internal_current ();
1313 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1315 mono_thread_detach_internal (thread);
1317 /* we could add a callback here for embedders to use. */
1318 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1319 exit (mono_environment_exitcode_get ());
1321 mono_thread_info_exit (0);
1325 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1327 MonoInternalThread *internal;
1329 internal = create_internal_thread_object ();
1331 internal->state = ThreadState_Unstarted;
1333 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1337 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1339 return mono_thread_current ();
1343 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1347 MonoInternalThread *internal;
1350 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1352 if (!this_obj->internal_thread)
1353 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1354 internal = this_obj->internal_thread;
1356 LOCK_THREAD (internal);
1358 if ((internal->state & ThreadState_Unstarted) == 0) {
1359 UNLOCK_THREAD (internal);
1360 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1364 if ((internal->state & ThreadState_Aborted) != 0) {
1365 UNLOCK_THREAD (internal);
1369 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1371 mono_error_cleanup (&error);
1372 UNLOCK_THREAD (internal);
1376 internal->state &= ~ThreadState_Unstarted;
1378 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1380 UNLOCK_THREAD (internal);
1381 return internal->handle;
1385 * This is called from the finalizer of the internal thread object.
1388 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1390 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1393 * Since threads keep a reference to their thread object while running, by
1394 * the time this function is called, the thread has already exited/detached,
1395 * i.e. mono_thread_detach_internal () has ran. The exception is during
1396 * shutdown, when mono_thread_detach_internal () can be called after this.
1398 if (this_obj->handle) {
1399 mono_threads_close_thread_handle (this_obj->handle);
1400 this_obj->handle = NULL;
1404 CloseHandle (this_obj->native_handle);
1407 if (this_obj->synch_cs) {
1408 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1409 this_obj->synch_cs = NULL;
1410 mono_coop_mutex_destroy (synch_cs);
1414 if (this_obj->name) {
1415 void *name = this_obj->name;
1416 this_obj->name = NULL;
1422 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1425 MonoInternalThread *thread = mono_thread_internal_current ();
1427 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1429 if (mono_thread_current_check_pending_interrupt ())
1433 gboolean alerted = FALSE;
1435 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1437 res = mono_thread_info_sleep (ms, &alerted);
1439 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1442 MonoException* exc = mono_thread_execute_interruption ();
1444 mono_raise_exception (exc);
1446 // FIXME: !MONO_INFINITE_WAIT
1447 if (ms != MONO_INFINITE_WAIT)
1456 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1461 ves_icall_System_Threading_Thread_GetDomainID (void)
1463 return mono_domain_get()->domain_id;
1467 ves_icall_System_Threading_Thread_Yield (void)
1469 return mono_thread_info_yield ();
1473 * mono_thread_get_name:
1475 * Return the name of the thread. NAME_LEN is set to the length of the name.
1476 * Return NULL if the thread has no name. The returned memory is owned by the
1480 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1484 LOCK_THREAD (this_obj);
1486 if (!this_obj->name) {
1490 *name_len = this_obj->name_len;
1491 res = g_new (gunichar2, this_obj->name_len);
1492 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1495 UNLOCK_THREAD (this_obj);
1501 * mono_thread_get_name_utf8:
1503 * Return the name of the thread in UTF-8.
1504 * Return NULL if the thread has no name.
1505 * The returned memory is owned by the caller.
1508 mono_thread_get_name_utf8 (MonoThread *thread)
1513 MonoInternalThread *internal = thread->internal_thread;
1514 if (internal == NULL)
1517 LOCK_THREAD (internal);
1519 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1521 UNLOCK_THREAD (internal);
1527 * mono_thread_get_managed_id:
1529 * Return the Thread.ManagedThreadId value of `thread`.
1530 * Returns -1 if `thread` is NULL.
1533 mono_thread_get_managed_id (MonoThread *thread)
1538 MonoInternalThread *internal = thread->internal_thread;
1539 if (internal == NULL)
1542 int32_t id = internal->managed_id;
1548 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1553 error_init (&error);
1555 LOCK_THREAD (this_obj);
1557 if (!this_obj->name)
1560 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1562 UNLOCK_THREAD (this_obj);
1564 if (mono_error_set_pending_exception (&error))
1571 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1573 LOCK_THREAD (this_obj);
1578 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1579 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1580 UNLOCK_THREAD (this_obj);
1582 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1585 if (this_obj->name) {
1586 g_free (this_obj->name);
1587 this_obj->name_len = 0;
1590 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1591 this_obj->name_len = mono_string_length (name);
1594 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1597 this_obj->name = NULL;
1600 UNLOCK_THREAD (this_obj);
1602 if (this_obj->name && this_obj->tid) {
1603 char *tname = mono_string_to_utf8_checked (name, error);
1604 return_if_nok (error);
1605 mono_profiler_thread_name (this_obj->tid, tname);
1606 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1612 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1615 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1616 mono_error_set_pending_exception (&error);
1620 * ves_icall_System_Threading_Thread_GetPriority_internal:
1621 * @param this_obj: The MonoInternalThread on which to operate.
1623 * Gets the priority of the given thread.
1624 * @return: The priority of the given thread.
1627 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1630 MonoInternalThread *internal = this_obj->internal_thread;
1632 LOCK_THREAD (internal);
1633 priority = internal->priority;
1634 UNLOCK_THREAD (internal);
1640 * ves_icall_System_Threading_Thread_SetPriority_internal:
1641 * @param this_obj: The MonoInternalThread on which to operate.
1642 * @param priority: The priority to set.
1644 * Sets the priority of the given thread.
1647 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1649 MonoInternalThread *internal = this_obj->internal_thread;
1651 LOCK_THREAD (internal);
1652 internal->priority = priority;
1653 if (internal->thread_info != NULL)
1654 mono_thread_internal_set_priority (internal, priority);
1655 UNLOCK_THREAD (internal);
1658 /* If the array is already in the requested domain, we just return it,
1659 otherwise we return a copy in that domain. */
1661 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1669 if (mono_object_domain (arr) == domain)
1672 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1673 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1678 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1681 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1682 mono_error_set_pending_exception (&error);
1687 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1690 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1691 mono_error_set_pending_exception (&error);
1696 mono_thread_current (void)
1698 MonoDomain *domain = mono_domain_get ();
1699 MonoInternalThread *internal = mono_thread_internal_current ();
1700 MonoThread **current_thread_ptr;
1702 g_assert (internal);
1703 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1705 if (!*current_thread_ptr) {
1706 g_assert (domain != mono_get_root_domain ());
1707 *current_thread_ptr = create_thread_object (domain, internal);
1709 return *current_thread_ptr;
1712 /* Return the thread object belonging to INTERNAL in the current domain */
1714 mono_thread_current_for_thread (MonoInternalThread *internal)
1716 MonoDomain *domain = mono_domain_get ();
1717 MonoThread **current_thread_ptr;
1719 g_assert (internal);
1720 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1722 if (!*current_thread_ptr) {
1723 g_assert (domain != mono_get_root_domain ());
1724 *current_thread_ptr = create_thread_object (domain, internal);
1726 return *current_thread_ptr;
1730 mono_thread_internal_current (void)
1732 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1733 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1737 static MonoThreadInfoWaitRet
1738 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1741 MonoThreadInfoWaitRet ret;
1748 start = (ms == -1) ? 0 : mono_msec_ticks ();
1751 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1754 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1757 exc = mono_thread_execute_interruption ();
1759 mono_error_set_exception_instance (error, exc);
1766 /* Re-calculate ms according to the time passed */
1767 diff_ms = (gint32)(mono_msec_ticks () - start);
1768 if (diff_ms >= ms) {
1769 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1772 wait = ms - diff_ms;
1779 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1781 MonoInternalThread *thread = this_obj->internal_thread;
1782 MonoThreadHandle *handle = thread->handle;
1783 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1787 if (mono_thread_current_check_pending_interrupt ())
1790 LOCK_THREAD (thread);
1792 if ((thread->state & ThreadState_Unstarted) != 0) {
1793 UNLOCK_THREAD (thread);
1795 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1799 UNLOCK_THREAD (thread);
1802 ms=MONO_INFINITE_WAIT;
1804 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1806 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1808 ret=mono_join_uninterrupted (handle, ms, &error);
1810 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1812 mono_error_set_pending_exception (&error);
1814 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1815 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1820 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1825 #define MANAGED_WAIT_FAILED 0x7fffffff
1828 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1830 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1831 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1832 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1833 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1834 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1835 return WAIT_IO_COMPLETION;
1836 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1837 return WAIT_TIMEOUT;
1838 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1839 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1840 return MANAGED_WAIT_FAILED;
1842 g_error ("%s: unknown val value %d", __func__, val);
1846 static MonoW32HandleWaitRet
1847 mono_wait_uninterrupted (MonoInternalThread *thread, guint32 numhandles, gpointer *handles, gboolean waitall, gint32 ms, MonoError *error)
1850 MonoW32HandleWaitRet ret;
1857 start = (ms == -1) ? 0 : mono_100ns_ticks ();
1861 if (numhandles != 1)
1862 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, wait, TRUE), numhandles);
1864 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], ms, TRUE), 1);
1866 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1867 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, wait, TRUE);
1868 #endif /* HOST_WIN32 */
1871 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1874 exc = mono_thread_execute_interruption ();
1876 mono_error_set_exception_instance (error, exc);
1883 /* Re-calculate ms according to the time passed */
1884 diff_ms = (gint32)((mono_100ns_ticks () - start) / 10000);
1885 if (diff_ms >= ms) {
1886 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1889 wait = ms - diff_ms;
1895 gint32 ves_icall_System_Threading_WaitHandle_WaitAll_internal(MonoArray *mono_handles, gint32 ms)
1900 MonoW32HandleWaitRet ret;
1902 MonoObject *waitHandle;
1903 MonoInternalThread *thread = mono_thread_internal_current ();
1905 /* Do this WaitSleepJoin check before creating objects */
1906 if (mono_thread_current_check_pending_interrupt ())
1907 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1909 /* We fail in managed if the array has more than 64 elements */
1910 numhandles = (guint32)mono_array_length(mono_handles);
1911 handles = g_new0(HANDLE, numhandles);
1913 for(i = 0; i < numhandles; i++) {
1914 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1915 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1919 ms=MONO_INFINITE_WAIT;
1922 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1924 ret = mono_wait_uninterrupted (thread, numhandles, handles, TRUE, ms, &error);
1926 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1930 mono_error_set_pending_exception (&error);
1932 return map_native_wait_result_to_managed (ret, numhandles);
1935 gint32 ves_icall_System_Threading_WaitHandle_WaitAny_internal(MonoArray *mono_handles, gint32 ms)
1938 HANDLE handles [MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
1939 uintptr_t numhandles;
1940 MonoW32HandleWaitRet ret;
1942 MonoObject *waitHandle;
1943 MonoInternalThread *thread = mono_thread_internal_current ();
1945 /* Do this WaitSleepJoin check before creating objects */
1946 if (mono_thread_current_check_pending_interrupt ())
1947 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1949 numhandles = mono_array_length(mono_handles);
1950 if (numhandles > MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
1951 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1953 for(i = 0; i < numhandles; i++) {
1954 waitHandle = mono_array_get(mono_handles, MonoObject*, i);
1955 handles [i] = mono_wait_handle_get_handle ((MonoWaitHandle *) waitHandle);
1959 ms=MONO_INFINITE_WAIT;
1962 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1964 ret = mono_wait_uninterrupted (thread, numhandles, handles, FALSE, ms, &error);
1966 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1968 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") returning %d", __func__, mono_native_thread_id_get (), ret));
1970 mono_error_set_pending_exception (&error);
1972 return map_native_wait_result_to_managed (ret, numhandles);
1975 gint32 ves_icall_System_Threading_WaitHandle_WaitOne_internal(HANDLE handle, gint32 ms)
1978 MonoW32HandleWaitRet ret;
1979 MonoInternalThread *thread = mono_thread_internal_current ();
1981 THREAD_WAIT_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") waiting for %p, %d ms", __func__, mono_native_thread_id_get (), handle, ms));
1984 ms=MONO_INFINITE_WAIT;
1987 if (mono_thread_current_check_pending_interrupt ())
1988 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1990 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1992 ret = mono_wait_uninterrupted (thread, 1, &handle, FALSE, ms, &error);
1994 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1996 mono_error_set_pending_exception (&error);
1997 return map_native_wait_result_to_managed (ret, 1);
2001 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (HANDLE toSignal, HANDLE toWait, gint32 ms)
2003 MonoW32HandleWaitRet ret;
2004 MonoInternalThread *thread = mono_thread_internal_current ();
2007 ms = MONO_INFINITE_WAIT;
2009 if (mono_thread_current_check_pending_interrupt ())
2010 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
2012 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
2016 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
2018 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
2022 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
2024 return map_native_wait_result_to_managed (ret, 1);
2027 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
2029 return InterlockedIncrement (location);
2032 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
2034 #if SIZEOF_VOID_P == 4
2035 if (G_UNLIKELY ((size_t)location & 0x7)) {
2037 mono_interlocked_lock ();
2040 mono_interlocked_unlock ();
2044 return InterlockedIncrement64 (location);
2047 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
2049 return InterlockedDecrement(location);
2052 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2054 #if SIZEOF_VOID_P == 4
2055 if (G_UNLIKELY ((size_t)location & 0x7)) {
2057 mono_interlocked_lock ();
2060 mono_interlocked_unlock ();
2064 return InterlockedDecrement64 (location);
2067 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2069 return InterlockedExchange(location, value);
2072 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2075 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2076 mono_gc_wbarrier_generic_nostore (location);
2080 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2082 return InterlockedExchangePointer(location, value);
2085 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2087 IntFloatUnion val, ret;
2090 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2096 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2098 #if SIZEOF_VOID_P == 4
2099 if (G_UNLIKELY ((size_t)location & 0x7)) {
2101 mono_interlocked_lock ();
2104 mono_interlocked_unlock ();
2108 return InterlockedExchange64 (location, value);
2112 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2114 LongDoubleUnion val, ret;
2117 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2122 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2124 return InterlockedCompareExchange(location, value, comparand);
2127 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2129 gint32 r = InterlockedCompareExchange(location, value, comparand);
2130 *success = r == comparand;
2134 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2137 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2138 mono_gc_wbarrier_generic_nostore (location);
2142 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2144 return InterlockedCompareExchangePointer(location, value, comparand);
2147 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2149 IntFloatUnion val, ret, cmp;
2152 cmp.fval = comparand;
2153 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2159 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2161 #if SIZEOF_VOID_P == 8
2162 LongDoubleUnion val, comp, ret;
2165 comp.fval = comparand;
2166 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2172 mono_interlocked_lock ();
2174 if (old == comparand)
2176 mono_interlocked_unlock ();
2183 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2185 #if SIZEOF_VOID_P == 4
2186 if (G_UNLIKELY ((size_t)location & 0x7)) {
2188 mono_interlocked_lock ();
2190 if (old == comparand)
2192 mono_interlocked_unlock ();
2196 return InterlockedCompareExchange64 (location, value, comparand);
2200 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2203 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2204 mono_gc_wbarrier_generic_nostore (location);
2209 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2212 MONO_CHECK_NULL (location, NULL);
2213 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2214 mono_gc_wbarrier_generic_nostore (location);
2219 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2221 return InterlockedAdd (location, value);
2225 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2227 #if SIZEOF_VOID_P == 4
2228 if (G_UNLIKELY ((size_t)location & 0x7)) {
2230 mono_interlocked_lock ();
2233 mono_interlocked_unlock ();
2237 return InterlockedAdd64 (location, value);
2241 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2243 #if SIZEOF_VOID_P == 4
2244 if (G_UNLIKELY ((size_t)location & 0x7)) {
2246 mono_interlocked_lock ();
2248 mono_interlocked_unlock ();
2252 return InterlockedRead64 (location);
2256 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2258 mono_memory_barrier ();
2262 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2264 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2266 if (state & ThreadState_Background) {
2267 /* If the thread changes the background mode, the main thread has to
2268 * be notified, since it has to rebuild the list of threads to
2271 mono_os_event_set (&background_change_event);
2276 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2278 mono_thread_set_state (this_obj, (MonoThreadState)state);
2280 if (state & ThreadState_Background) {
2281 /* If the thread changes the background mode, the main thread has to
2282 * be notified, since it has to rebuild the list of threads to
2285 mono_os_event_set (&background_change_event);
2290 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2294 LOCK_THREAD (this_obj);
2296 state = this_obj->state;
2298 UNLOCK_THREAD (this_obj);
2303 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2305 MonoInternalThread *current;
2307 MonoInternalThread *thread = this_obj->internal_thread;
2309 LOCK_THREAD (thread);
2311 current = mono_thread_internal_current ();
2313 thread->thread_interrupt_requested = TRUE;
2314 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2316 UNLOCK_THREAD (thread);
2319 async_abort_internal (thread, FALSE);
2324 * mono_thread_current_check_pending_interrupt:
2326 * Checks if there's a interruption request and set the pending exception if so.
2328 * @returns true if a pending exception was set
2331 mono_thread_current_check_pending_interrupt (void)
2333 MonoInternalThread *thread = mono_thread_internal_current ();
2334 gboolean throw_ = FALSE;
2336 LOCK_THREAD (thread);
2338 if (thread->thread_interrupt_requested) {
2340 thread->thread_interrupt_requested = FALSE;
2343 UNLOCK_THREAD (thread);
2346 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2351 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2353 LOCK_THREAD (thread);
2355 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2357 UNLOCK_THREAD (thread);
2361 if ((thread->state & ThreadState_Unstarted) != 0) {
2362 thread->state |= ThreadState_Aborted;
2363 UNLOCK_THREAD (thread);
2367 thread->state |= ThreadState_AbortRequested;
2368 if (thread->abort_state_handle)
2369 mono_gchandle_free (thread->abort_state_handle);
2371 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2372 g_assert (thread->abort_state_handle);
2374 thread->abort_state_handle = 0;
2376 thread->abort_exc = NULL;
2378 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));
2380 /* During shutdown, we can't wait for other threads */
2382 /* Make sure the thread is awake */
2383 mono_thread_resume (thread);
2385 UNLOCK_THREAD (thread);
2390 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2392 if (!request_thread_abort (thread, state))
2395 if (thread == mono_thread_internal_current ()) {
2397 self_abort_internal (&error);
2398 mono_error_set_pending_exception (&error);
2400 async_abort_internal (thread, TRUE);
2405 * mono_thread_internal_abort:
2407 * Request thread @thread to be aborted.
2409 * @thread MUST NOT be the current thread.
2412 mono_thread_internal_abort (MonoInternalThread *thread)
2414 g_assert (thread != mono_thread_internal_current ());
2416 if (!request_thread_abort (thread, NULL))
2418 async_abort_internal (thread, TRUE);
2422 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2424 MonoInternalThread *thread = mono_thread_internal_current ();
2425 gboolean was_aborting;
2427 LOCK_THREAD (thread);
2428 was_aborting = thread->state & ThreadState_AbortRequested;
2429 thread->state &= ~ThreadState_AbortRequested;
2430 UNLOCK_THREAD (thread);
2432 if (!was_aborting) {
2433 const char *msg = "Unable to reset abort because no abort was requested";
2434 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2438 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2439 thread->abort_exc = NULL;
2440 if (thread->abort_state_handle) {
2441 mono_gchandle_free (thread->abort_state_handle);
2442 /* This is actually not necessary - the handle
2443 only counts if the exception is set */
2444 thread->abort_state_handle = 0;
2449 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2451 LOCK_THREAD (thread);
2453 thread->state &= ~ThreadState_AbortRequested;
2455 if (thread->abort_exc) {
2456 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2457 thread->abort_exc = NULL;
2458 if (thread->abort_state_handle) {
2459 mono_gchandle_free (thread->abort_state_handle);
2460 /* This is actually not necessary - the handle
2461 only counts if the exception is set */
2462 thread->abort_state_handle = 0;
2466 UNLOCK_THREAD (thread);
2470 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2473 MonoInternalThread *thread = this_obj->internal_thread;
2474 MonoObject *state, *deserialized = NULL;
2477 if (!thread->abort_state_handle)
2480 state = mono_gchandle_get_target (thread->abort_state_handle);
2483 domain = mono_domain_get ();
2484 if (mono_object_domain (state) == domain)
2487 deserialized = mono_object_xdomain_representation (state, domain, &error);
2489 if (!deserialized) {
2490 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2491 if (!is_ok (&error)) {
2492 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2493 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2495 mono_set_pending_exception (invalid_op_exc);
2499 return deserialized;
2503 mono_thread_suspend (MonoInternalThread *thread)
2505 LOCK_THREAD (thread);
2507 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2509 UNLOCK_THREAD (thread);
2513 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2515 UNLOCK_THREAD (thread);
2519 thread->state |= ThreadState_SuspendRequested;
2520 mono_os_event_reset (thread->suspended);
2522 if (thread == mono_thread_internal_current ()) {
2523 /* calls UNLOCK_THREAD (thread) */
2524 self_suspend_internal ();
2526 /* calls UNLOCK_THREAD (thread) */
2527 async_suspend_internal (thread, FALSE);
2534 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2536 if (!mono_thread_suspend (this_obj->internal_thread)) {
2537 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2542 /* LOCKING: LOCK_THREAD(thread) must be held */
2544 mono_thread_resume (MonoInternalThread *thread)
2546 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2547 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2548 thread->state &= ~ThreadState_SuspendRequested;
2549 mono_os_event_set (thread->suspended);
2553 if ((thread->state & ThreadState_Suspended) == 0 ||
2554 (thread->state & ThreadState_Unstarted) != 0 ||
2555 (thread->state & ThreadState_Aborted) != 0 ||
2556 (thread->state & ThreadState_Stopped) != 0)
2558 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2562 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2564 mono_os_event_set (thread->suspended);
2566 if (!thread->self_suspended) {
2567 UNLOCK_THREAD (thread);
2569 /* Awake the thread */
2570 if (!mono_thread_info_resume (thread_get_tid (thread)))
2573 LOCK_THREAD (thread);
2576 thread->state &= ~ThreadState_Suspended;
2582 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2584 if (!thread->internal_thread) {
2585 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2587 LOCK_THREAD (thread->internal_thread);
2588 if (!mono_thread_resume (thread->internal_thread))
2589 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2590 UNLOCK_THREAD (thread->internal_thread);
2595 mono_threads_is_critical_method (MonoMethod *method)
2597 switch (method->wrapper_type) {
2598 case MONO_WRAPPER_RUNTIME_INVOKE:
2599 case MONO_WRAPPER_XDOMAIN_INVOKE:
2600 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2607 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2612 if (mono_threads_is_critical_method (m)) {
2613 *((gboolean*)data) = TRUE;
2620 is_running_protected_wrapper (void)
2622 gboolean found = FALSE;
2623 mono_stack_walk (find_wrapper, &found);
2628 mono_thread_stop (MonoThread *thread)
2630 MonoInternalThread *internal = thread->internal_thread;
2632 if (!request_thread_abort (internal, NULL))
2635 if (internal == mono_thread_internal_current ()) {
2637 self_abort_internal (&error);
2639 This function is part of the embeding API and has no way to return the exception
2640 to be thrown. So what we do is keep the old behavior and raise the exception.
2642 mono_error_raise_exception (&error); /* OK to throw, see note */
2644 async_abort_internal (internal, TRUE);
2649 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2651 gint8 tmp = *(volatile gint8 *)ptr;
2652 mono_memory_barrier ();
2657 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2659 gint16 tmp = *(volatile gint16 *)ptr;
2660 mono_memory_barrier ();
2665 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2667 gint32 tmp = *(volatile gint32 *)ptr;
2668 mono_memory_barrier ();
2673 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2675 gint64 tmp = *(volatile gint64 *)ptr;
2676 mono_memory_barrier ();
2681 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2683 volatile void *tmp = *(volatile void **)ptr;
2684 mono_memory_barrier ();
2685 return (void *) tmp;
2689 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2691 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2692 mono_memory_barrier ();
2693 return (MonoObject *) tmp;
2697 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2699 double tmp = *(volatile double *)ptr;
2700 mono_memory_barrier ();
2705 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2707 float tmp = *(volatile float *)ptr;
2708 mono_memory_barrier ();
2713 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2715 return InterlockedRead8 ((volatile gint8 *)ptr);
2719 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2721 return InterlockedRead16 ((volatile gint16 *)ptr);
2725 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2727 return InterlockedRead ((volatile gint32 *)ptr);
2731 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2733 #if SIZEOF_VOID_P == 4
2734 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2736 mono_interlocked_lock ();
2737 val = *(gint64*)ptr;
2738 mono_interlocked_unlock ();
2742 return InterlockedRead64 ((volatile gint64 *)ptr);
2746 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2748 return InterlockedReadPointer ((volatile gpointer *)ptr);
2752 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2756 #if SIZEOF_VOID_P == 4
2757 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2759 mono_interlocked_lock ();
2760 val = *(double*)ptr;
2761 mono_interlocked_unlock ();
2766 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2772 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2776 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2782 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2784 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2788 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2790 mono_memory_barrier ();
2791 *(volatile gint8 *)ptr = value;
2795 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2797 mono_memory_barrier ();
2798 *(volatile gint16 *)ptr = value;
2802 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2804 mono_memory_barrier ();
2805 *(volatile gint32 *)ptr = value;
2809 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2811 mono_memory_barrier ();
2812 *(volatile gint64 *)ptr = value;
2816 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2818 mono_memory_barrier ();
2819 *(volatile void **)ptr = value;
2823 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2825 mono_memory_barrier ();
2826 mono_gc_wbarrier_generic_store (ptr, value);
2830 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2832 mono_memory_barrier ();
2833 *(volatile double *)ptr = value;
2837 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2839 mono_memory_barrier ();
2840 *(volatile float *)ptr = value;
2844 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2846 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2850 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2852 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2856 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2858 InterlockedWrite ((volatile gint32 *)ptr, value);
2862 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2864 #if SIZEOF_VOID_P == 4
2865 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2866 mono_interlocked_lock ();
2867 *(gint64*)ptr = value;
2868 mono_interlocked_unlock ();
2873 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2877 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2879 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2883 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2887 #if SIZEOF_VOID_P == 4
2888 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2889 mono_interlocked_lock ();
2890 *(double*)ptr = value;
2891 mono_interlocked_unlock ();
2898 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2902 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2908 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2912 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2914 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2918 free_context (void *user_data)
2920 ContextStaticData *data = user_data;
2922 mono_threads_lock ();
2925 * There is no guarantee that, by the point this reference queue callback
2926 * has been invoked, the GC handle associated with the object will fail to
2927 * resolve as one might expect. So if we don't free and remove the GC
2928 * handle here, free_context_static_data_helper () could end up resolving
2929 * a GC handle to an actually-dead context which would contain a pointer
2930 * to an already-freed static data segment, resulting in a crash when
2933 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2935 mono_threads_unlock ();
2937 mono_gchandle_free (data->gc_handle);
2938 mono_free_static_data (data->static_data);
2943 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContext *ctx)
2945 mono_threads_lock ();
2947 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2950 contexts = g_hash_table_new (NULL, NULL);
2953 context_queue = mono_gc_reference_queue_new (free_context);
2955 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2956 g_hash_table_insert (contexts, gch, gch);
2959 * We use this intermediate structure to contain a duplicate pointer to
2960 * the static data because we can't rely on being able to resolve the GC
2961 * handle in the reference queue callback.
2963 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2964 data->gc_handle = GPOINTER_TO_UINT (gch);
2967 context_adjust_static_data (ctx);
2968 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2970 mono_threads_unlock ();
2972 mono_profiler_context_loaded (ctx);
2976 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContext *ctx)
2979 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2980 * cleanup in exceptional circumstances, we don't actually do any
2981 * cleanup work here. We instead do this via a reference queue.
2984 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2986 mono_profiler_context_unloaded (ctx);
2989 void mono_thread_init (MonoThreadStartCB start_cb,
2990 MonoThreadAttachCB attach_cb)
2992 mono_coop_mutex_init_recursive (&threads_mutex);
2994 mono_os_mutex_init_recursive(&interlocked_mutex);
2995 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2997 mono_os_event_init (&background_change_event, FALSE);
2999 mono_init_static_data_info (&thread_static_info);
3000 mono_init_static_data_info (&context_static_info);
3002 mono_thread_start_cb = start_cb;
3003 mono_thread_attach_cb = attach_cb;
3006 void mono_thread_cleanup (void)
3008 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3009 /* The main thread must abandon any held mutexes (particularly
3010 * important for named mutexes as they are shared across
3011 * processes, see bug 74680.) This will happen when the
3012 * thread exits, but if it's not running in a subthread it
3013 * won't exit in time.
3015 mono_w32mutex_abandon ();
3019 /* This stuff needs more testing, it seems one of these
3020 * critical sections can be locked when mono_thread_cleanup is
3023 mono_coop_mutex_destroy (&threads_mutex);
3024 mono_os_mutex_destroy (&interlocked_mutex);
3025 mono_os_mutex_destroy (&delayed_free_table_mutex);
3026 mono_os_mutex_destroy (&small_id_mutex);
3027 mono_os_event_destroy (&background_change_event);
3032 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3034 mono_thread_cleanup_fn = func;
3038 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3040 thread->internal_thread->manage_callback = func;
3044 static void print_tids (gpointer key, gpointer value, gpointer user)
3046 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3047 * sizeof(uint) and a cast to uint would overflow
3049 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3050 * print this as a pointer.
3052 g_message ("Waiting for: %p", key);
3057 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3058 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3063 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3066 MonoThreadInfoWaitRet ret;
3068 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3070 /* Add the thread state change event, so it wakes
3071 * up if a thread changes to background mode. */
3074 if (check_state_change)
3075 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3077 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3080 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3081 /* See the comment in build_wait_tids() */
3082 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3086 for( i = 0; i < wait->num; i++)
3087 mono_threads_close_thread_handle (wait->handles [i]);
3089 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3092 if (ret < wait->num) {
3093 MonoInternalThread *internal;
3095 internal = wait->threads [ret];
3097 mono_threads_lock ();
3098 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3099 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3100 mono_threads_unlock ();
3104 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3106 struct wait_data *wait=(struct wait_data *)user;
3108 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3109 MonoInternalThread *thread=(MonoInternalThread *)value;
3111 /* Ignore background threads, we abort them later */
3112 /* Do not lock here since it is not needed and the caller holds threads_lock */
3113 if (thread->state & ThreadState_Background) {
3114 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3115 return; /* just leave, ignore */
3118 if (mono_gc_is_finalizer_internal_thread (thread)) {
3119 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3123 if (thread == mono_thread_internal_current ()) {
3124 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3128 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3129 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3133 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3134 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3138 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3139 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3140 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3141 wait->threads[wait->num]=thread;
3144 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3146 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3151 /* Just ignore the rest, we can't do anything with
3158 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3160 struct wait_data *wait=(struct wait_data *)user;
3161 MonoNativeThreadId self = mono_native_thread_id_get ();
3162 MonoInternalThread *thread = (MonoInternalThread *)value;
3164 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3167 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3169 if (mono_gc_is_finalizer_internal_thread (thread))
3172 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3173 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3174 wait->threads[wait->num] = thread;
3177 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3178 mono_thread_internal_abort (thread);
3185 * mono_threads_set_shutting_down:
3187 * Is called by a thread that wants to shut down Mono. If the runtime is already
3188 * shutting down, the calling thread is suspended/stopped, and this function never
3192 mono_threads_set_shutting_down (void)
3194 MonoInternalThread *current_thread = mono_thread_internal_current ();
3196 mono_threads_lock ();
3198 if (shutting_down) {
3199 mono_threads_unlock ();
3201 /* Make sure we're properly suspended/stopped */
3203 LOCK_THREAD (current_thread);
3205 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3206 UNLOCK_THREAD (current_thread);
3207 mono_thread_execute_interruption ();
3209 UNLOCK_THREAD (current_thread);
3212 /*since we're killing the thread, detach it.*/
3213 mono_thread_detach_internal (current_thread);
3215 /* Wake up other threads potentially waiting for us */
3216 mono_thread_info_exit (0);
3218 shutting_down = TRUE;
3220 /* Not really a background state change, but this will
3221 * interrupt the main thread if it is waiting for all
3222 * the other threads.
3224 mono_os_event_set (&background_change_event);
3226 mono_threads_unlock ();
3230 void mono_thread_manage (void)
3232 struct wait_data wait_data;
3233 struct wait_data *wait = &wait_data;
3235 memset (wait, 0, sizeof (struct wait_data));
3236 /* join each thread that's still running */
3237 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3239 mono_threads_lock ();
3241 THREAD_DEBUG (g_message("%s: No threads", __func__));
3242 mono_threads_unlock ();
3245 mono_threads_unlock ();
3248 mono_threads_lock ();
3249 if (shutting_down) {
3250 /* somebody else is shutting down */
3251 mono_threads_unlock ();
3254 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3255 mono_g_hash_table_foreach (threads, print_tids, NULL));
3257 mono_os_event_reset (&background_change_event);
3259 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3260 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3261 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3262 mono_threads_unlock ();
3264 /* Something to wait for */
3265 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3266 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3267 } while(wait->num>0);
3269 /* Mono is shutting down, so just wait for the end */
3270 if (!mono_runtime_try_shutdown ()) {
3271 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3272 mono_thread_suspend (mono_thread_internal_current ());
3273 mono_thread_execute_interruption ();
3277 * Remove everything but the finalizer thread and self.
3278 * Also abort all the background threads
3281 mono_threads_lock ();
3284 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3285 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3286 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3288 mono_threads_unlock ();
3290 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3291 if (wait->num > 0) {
3292 /* Something to wait for */
3293 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3295 } while (wait->num > 0);
3298 * give the subthreads a chance to really quit (this is mainly needed
3299 * to get correct user and system times from getrusage/wait/time(1)).
3300 * This could be removed if we avoid pthread_detach() and use pthread_join().
3302 mono_thread_info_yield ();
3306 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3308 MonoInternalThread *thread = (MonoInternalThread*)value;
3309 struct wait_data *wait = (struct wait_data*)user_data;
3312 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3314 * This needs no locking.
3316 if ((thread->state & ThreadState_Suspended) != 0 ||
3317 (thread->state & ThreadState_Stopped) != 0)
3320 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3321 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3322 wait->threads [wait->num] = thread;
3328 * mono_thread_suspend_all_other_threads:
3330 * Suspend all managed threads except the finalizer thread and this thread. It is
3331 * not possible to resume them later.
3333 void mono_thread_suspend_all_other_threads (void)
3335 struct wait_data wait_data;
3336 struct wait_data *wait = &wait_data;
3338 MonoNativeThreadId self = mono_native_thread_id_get ();
3339 guint32 eventidx = 0;
3340 gboolean starting, finished;
3342 memset (wait, 0, sizeof (struct wait_data));
3344 * The other threads could be in an arbitrary state at this point, i.e.
3345 * they could be starting up, shutting down etc. This means that there could be
3346 * threads which are not even in the threads hash table yet.
3350 * First we set a barrier which will be checked by all threads before they
3351 * are added to the threads hash table, and they will exit if the flag is set.
3352 * This ensures that no threads could be added to the hash later.
3353 * We will use shutting_down as the barrier for now.
3355 g_assert (shutting_down);
3358 * We make multiple calls to WaitForMultipleObjects since:
3359 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3360 * - some threads could exit without becoming suspended
3365 * Make a copy of the hashtable since we can't do anything with
3366 * threads while threads_mutex is held.
3369 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3370 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3371 mono_threads_lock ();
3372 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3373 mono_threads_unlock ();
3376 /* Get the suspended events that we'll be waiting for */
3377 for (i = 0; i < wait->num; ++i) {
3378 MonoInternalThread *thread = wait->threads [i];
3380 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3381 || mono_gc_is_finalizer_internal_thread (thread)
3382 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3384 mono_threads_close_thread_handle (wait->handles [i]);
3385 wait->threads [i] = NULL;
3389 LOCK_THREAD (thread);
3391 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3392 UNLOCK_THREAD (thread);
3393 mono_threads_close_thread_handle (wait->handles [i]);
3394 wait->threads [i] = NULL;
3400 /* Convert abort requests into suspend requests */
3401 if ((thread->state & ThreadState_AbortRequested) != 0)
3402 thread->state &= ~ThreadState_AbortRequested;
3404 thread->state |= ThreadState_SuspendRequested;
3405 mono_os_event_reset (thread->suspended);
3407 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3408 async_suspend_internal (thread, TRUE);
3410 mono_threads_close_thread_handle (wait->handles [i]);
3411 wait->threads [i] = NULL;
3413 if (eventidx <= 0) {
3415 * If there are threads which are starting up, we wait until they
3416 * are suspended when they try to register in the threads hash.
3417 * This is guaranteed to finish, since the threads which can create new
3418 * threads get suspended after a while.
3419 * FIXME: The finalizer thread can still create new threads.
3421 mono_threads_lock ();
3422 if (threads_starting_up)
3423 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3426 mono_threads_unlock ();
3428 mono_thread_info_sleep (100, NULL);
3436 MonoInternalThread *thread;
3437 MonoStackFrameInfo *frames;
3438 int nframes, max_frames;
3439 int nthreads, max_threads;
3440 MonoInternalThread **threads;
3441 } ThreadDumpUserData;
3443 static gboolean thread_dump_requested;
3445 /* This needs to be async safe */
3447 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3449 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3451 if (ud->nframes < ud->max_frames) {
3452 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3459 /* This needs to be async safe */
3460 static SuspendThreadResult
3461 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3463 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3464 MonoInternalThread *thread = user_data->thread;
3467 /* This no longer works with remote unwinding */
3468 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3469 mono_thread_internal_describe (thread, text);
3470 g_string_append (text, "\n");
3473 if (thread == mono_thread_internal_current ())
3474 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3476 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3478 return MonoResumeThread;
3482 int nthreads, max_threads;
3483 MonoInternalThread **threads;
3484 } CollectThreadsUserData;
3487 collect_thread (gpointer key, gpointer value, gpointer user)
3489 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3490 MonoInternalThread *thread = (MonoInternalThread *)value;
3492 if (ud->nthreads < ud->max_threads)
3493 ud->threads [ud->nthreads ++] = thread;
3497 * Collect running threads into the THREADS array.
3498 * THREADS should be an array allocated on the stack.
3501 collect_threads (MonoInternalThread **thread_array, int max_threads)
3503 CollectThreadsUserData ud;
3505 memset (&ud, 0, sizeof (ud));
3506 /* This array contains refs, but its on the stack, so its ok */
3507 ud.threads = thread_array;
3508 ud.max_threads = max_threads;
3510 mono_threads_lock ();
3511 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3512 mono_threads_unlock ();
3518 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3520 GString* text = g_string_new (0);
3522 GError *error = NULL;
3525 ud->thread = thread;
3528 /* Collect frames for the thread */
3529 if (thread == mono_thread_internal_current ()) {
3530 get_thread_dump (mono_thread_info_current (), ud);
3532 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3536 * Do all the non async-safe work outside of get_thread_dump.
3539 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3541 g_string_append_printf (text, "\n\"%s\"", name);
3544 else if (thread->threadpool_thread) {
3545 g_string_append (text, "\n\"<threadpool thread>\"");
3547 g_string_append (text, "\n\"<unnamed thread>\"");
3550 for (i = 0; i < ud->nframes; ++i) {
3551 MonoStackFrameInfo *frame = &ud->frames [i];
3552 MonoMethod *method = NULL;
3554 if (frame->type == FRAME_TYPE_MANAGED)
3555 method = mono_jit_info_get_method (frame->ji);
3558 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3559 g_string_append_printf (text, " %s\n", location);
3562 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3566 fprintf (stdout, "%s", text->str);
3568 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3569 OutputDebugStringA(text->str);
3572 g_string_free (text, TRUE);
3577 mono_threads_perform_thread_dump (void)
3579 ThreadDumpUserData ud;
3580 MonoInternalThread *thread_array [128];
3581 int tindex, nthreads;
3583 if (!thread_dump_requested)
3586 printf ("Full thread dump:\n");
3588 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3589 nthreads = collect_threads (thread_array, 128);
3591 memset (&ud, 0, sizeof (ud));
3592 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3593 ud.max_frames = 256;
3595 for (tindex = 0; tindex < nthreads; ++tindex)
3596 dump_thread (thread_array [tindex], &ud);
3600 thread_dump_requested = FALSE;
3603 /* Obtain the thread dump of all threads */
3605 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3608 ThreadDumpUserData ud;
3609 MonoInternalThread *thread_array [128];
3610 MonoDomain *domain = mono_domain_get ();
3611 MonoDebugSourceLocation *location;
3612 int tindex, nthreads;
3616 *out_threads = NULL;
3617 *out_stack_frames = NULL;
3619 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3620 nthreads = collect_threads (thread_array, 128);
3622 memset (&ud, 0, sizeof (ud));
3623 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3624 ud.max_frames = 256;
3626 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3629 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3633 for (tindex = 0; tindex < nthreads; ++tindex) {
3634 MonoInternalThread *thread = thread_array [tindex];
3635 MonoArray *thread_frames;
3641 /* Collect frames for the thread */
3642 if (thread == mono_thread_internal_current ()) {
3643 get_thread_dump (mono_thread_info_current (), &ud);
3645 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3648 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3650 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3653 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3655 for (i = 0; i < ud.nframes; ++i) {
3656 MonoStackFrameInfo *frame = &ud.frames [i];
3657 MonoMethod *method = NULL;
3658 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3662 sf->native_offset = frame->native_offset;
3664 if (frame->type == FRAME_TYPE_MANAGED)
3665 method = mono_jit_info_get_method (frame->ji);
3668 sf->method_address = (gsize) frame->ji->code_start;
3670 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3673 MONO_OBJECT_SETREF (sf, method, rm);
3675 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3677 sf->il_offset = location->il_offset;
3679 if (location && location->source_file) {
3680 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
3681 sf->line = location->row;
3682 sf->column = location->column;
3684 mono_debug_free_source_location (location);
3689 mono_array_setref (thread_frames, i, sf);
3695 return is_ok (error);
3699 * mono_threads_request_thread_dump:
3701 * Ask all threads except the current to print their stacktrace to stdout.
3704 mono_threads_request_thread_dump (void)
3706 /*The new thread dump code runs out of the finalizer thread. */
3707 thread_dump_requested = TRUE;
3708 mono_gc_finalize_notify ();
3713 gint allocated; /* +1 so that refs [allocated] == NULL */
3717 typedef struct ref_stack RefStack;
3720 ref_stack_new (gint initial_size)
3724 initial_size = MAX (initial_size, 16) + 1;
3725 rs = g_new0 (RefStack, 1);
3726 rs->refs = g_new0 (gpointer, initial_size);
3727 rs->allocated = initial_size;
3732 ref_stack_destroy (gpointer ptr)
3734 RefStack *rs = (RefStack *)ptr;
3743 ref_stack_push (RefStack *rs, gpointer ptr)
3745 g_assert (rs != NULL);
3747 if (rs->bottom >= rs->allocated) {
3748 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3749 rs->allocated <<= 1;
3750 rs->refs [rs->allocated] = NULL;
3752 rs->refs [rs->bottom++] = ptr;
3756 ref_stack_pop (RefStack *rs)
3758 if (rs == NULL || rs->bottom == 0)
3762 rs->refs [rs->bottom] = NULL;
3766 ref_stack_find (RefStack *rs, gpointer ptr)
3773 for (refs = rs->refs; refs && *refs; refs++) {
3781 * mono_thread_push_appdomain_ref:
3783 * Register that the current thread may have references to objects in domain
3784 * @domain on its stack. Each call to this function should be paired with a
3785 * call to pop_appdomain_ref.
3788 mono_thread_push_appdomain_ref (MonoDomain *domain)
3790 MonoInternalThread *thread = mono_thread_internal_current ();
3793 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3794 SPIN_LOCK (thread->lock_thread_id);
3795 if (thread->appdomain_refs == NULL)
3796 thread->appdomain_refs = ref_stack_new (16);
3797 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3798 SPIN_UNLOCK (thread->lock_thread_id);
3803 mono_thread_pop_appdomain_ref (void)
3805 MonoInternalThread *thread = mono_thread_internal_current ();
3808 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3809 SPIN_LOCK (thread->lock_thread_id);
3810 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3811 SPIN_UNLOCK (thread->lock_thread_id);
3816 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3819 SPIN_LOCK (thread->lock_thread_id);
3820 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3821 SPIN_UNLOCK (thread->lock_thread_id);
3826 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3828 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3831 typedef struct abort_appdomain_data {
3832 struct wait_data wait;
3834 } abort_appdomain_data;
3837 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3839 MonoInternalThread *thread = (MonoInternalThread*)value;
3840 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3841 MonoDomain *domain = data->domain;
3843 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3844 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3846 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3847 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3848 data->wait.threads [data->wait.num] = thread;
3851 /* Just ignore the rest, we can't do anything with
3859 * mono_threads_abort_appdomain_threads:
3861 * Abort threads which has references to the given appdomain.
3864 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3866 #ifdef __native_client__
3870 abort_appdomain_data user_data;
3872 int orig_timeout = timeout;
3875 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3877 start_time = mono_msec_ticks ();
3879 mono_threads_lock ();
3881 user_data.domain = domain;
3882 user_data.wait.num = 0;
3883 /* This shouldn't take any locks */
3884 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3885 mono_threads_unlock ();
3887 if (user_data.wait.num > 0) {
3888 /* Abort the threads outside the threads lock */
3889 for (i = 0; i < user_data.wait.num; ++i)
3890 mono_thread_internal_abort (user_data.wait.threads [i]);
3893 * We should wait for the threads either to abort, or to leave the
3894 * domain. We can't do the latter, so we wait with a timeout.
3896 wait_for_tids (&user_data.wait, 100, FALSE);
3899 /* Update remaining time */
3900 timeout -= mono_msec_ticks () - start_time;
3901 start_time = mono_msec_ticks ();
3903 if (orig_timeout != -1 && timeout < 0)
3906 while (user_data.wait.num > 0);
3908 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3914 * mono_thread_get_undeniable_exception:
3916 * Return an exception which needs to be raised when leaving a catch clause.
3917 * This is used for undeniable exception propagation.
3920 mono_thread_get_undeniable_exception (void)
3922 MonoInternalThread *thread = mono_thread_internal_current ();
3924 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3927 // We don't want to have our exception effect calls made by
3928 // the catching block
3930 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3934 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3935 * exception if the thread no longer references a dying appdomain.
3937 thread->abort_exc->trace_ips = NULL;
3938 thread->abort_exc->stack_trace = NULL;
3939 return thread->abort_exc;
3942 #if MONO_SMALL_CONFIG
3943 #define NUM_STATIC_DATA_IDX 4
3944 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3948 #define NUM_STATIC_DATA_IDX 8
3949 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3950 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
3954 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
3955 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
3958 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
3960 gpointer *static_data = (gpointer *)addr;
3962 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
3963 void **ptr = (void **)static_data [i];
3968 MONO_BITSET_FOREACH (bitmaps [i], idx, {
3969 void **p = ptr + idx;
3972 mark_func ((MonoObject**)p, gc_data);
3978 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3980 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
3984 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
3986 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
3990 * mono_alloc_static_data
3992 * Allocate memory blocks for storing threads or context static data
3995 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
3997 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4000 gpointer* static_data = *static_data_ptr;
4002 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4003 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4005 if (mono_gc_user_markers_supported ()) {
4006 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4007 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4009 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4010 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4013 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4014 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4015 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4016 *static_data_ptr = static_data;
4017 static_data [0] = static_data;
4020 for (i = 1; i <= idx; ++i) {
4021 if (static_data [i])
4024 if (mono_gc_user_markers_supported ())
4025 static_data [i] = g_malloc0 (static_data_size [i]);
4027 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4028 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4029 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4034 mono_free_static_data (gpointer* static_data)
4037 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4038 gpointer p = static_data [i];
4042 * At this point, the static data pointer array is still registered with the
4043 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4044 * data. Freeing the individual arrays without first nulling their slots
4045 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4046 * such an already freed array. See bug #13813.
4048 static_data [i] = NULL;
4049 mono_memory_write_barrier ();
4050 if (mono_gc_user_markers_supported ())
4053 mono_gc_free_fixed (p);
4055 mono_gc_free_fixed (static_data);
4059 * mono_init_static_data_info
4061 * Initializes static data counters
4063 static void mono_init_static_data_info (StaticDataInfo *static_data)
4065 static_data->idx = 0;
4066 static_data->offset = 0;
4067 static_data->freelist = NULL;
4071 * mono_alloc_static_data_slot
4073 * Generates an offset for static data. static_data contains the counters
4074 * used to generate it.
4077 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4079 if (!static_data->idx && !static_data->offset) {
4081 * we use the first chunk of the first allocation also as
4082 * an array for the rest of the data
4084 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4086 static_data->offset += align - 1;
4087 static_data->offset &= ~(align - 1);
4088 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4089 static_data->idx ++;
4090 g_assert (size <= static_data_size [static_data->idx]);
4091 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4092 static_data->offset = 0;
4094 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4095 static_data->offset += size;
4100 * LOCKING: requires that threads_mutex is held
4103 context_adjust_static_data (MonoAppContext *ctx)
4105 if (context_static_info.offset || context_static_info.idx > 0) {
4106 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4107 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4108 ctx->data->static_data = ctx->static_data;
4113 * LOCKING: requires that threads_mutex is held
4116 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4118 MonoInternalThread *thread = (MonoInternalThread *)value;
4119 guint32 offset = GPOINTER_TO_UINT (user);
4121 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4125 * LOCKING: requires that threads_mutex is held
4128 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4130 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4135 guint32 offset = GPOINTER_TO_UINT (user);
4136 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4137 ctx->data->static_data = ctx->static_data;
4140 static StaticDataFreeList*
4141 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4143 StaticDataFreeList* prev = NULL;
4144 StaticDataFreeList* tmp = static_data->freelist;
4146 if (tmp->size == size) {
4148 prev->next = tmp->next;
4150 static_data->freelist = tmp->next;
4159 #if SIZEOF_VOID_P == 4
4166 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4168 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4170 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4171 MonoBitSet *rb = sets [idx];
4172 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4173 offset /= sizeof (uintptr_t);
4174 /* offset is now the bitmap offset */
4175 for (int i = 0; i < numbits; ++i) {
4176 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4177 mono_bitset_set_fast (rb, offset + i);
4182 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4184 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4185 MonoBitSet *rb = sets [idx];
4186 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4187 offset /= sizeof (uintptr_t);
4188 /* offset is now the bitmap offset */
4189 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4190 mono_bitset_clear_fast (rb, offset + i);
4194 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4196 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4198 StaticDataInfo *info;
4201 if (static_type == SPECIAL_STATIC_THREAD) {
4202 info = &thread_static_info;
4203 sets = thread_reference_bitmaps;
4205 info = &context_static_info;
4206 sets = context_reference_bitmaps;
4209 mono_threads_lock ();
4211 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4215 offset = item->offset;
4218 offset = mono_alloc_static_data_slot (info, size, align);
4221 update_reference_bitmap (sets, offset, bitmap, numbits);
4223 if (static_type == SPECIAL_STATIC_THREAD) {
4224 /* This can be called during startup */
4225 if (threads != NULL)
4226 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4228 if (contexts != NULL)
4229 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4231 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4234 mono_threads_unlock ();
4240 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4242 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4244 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4245 return get_thread_static_data (thread, offset);
4247 return get_context_static_data (thread->current_appcontext, offset);
4252 mono_get_special_static_data (guint32 offset)
4254 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4263 * LOCKING: requires that threads_mutex is held
4266 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4268 MonoInternalThread *thread = (MonoInternalThread *)value;
4269 OffsetSize *data = (OffsetSize *)user;
4270 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4271 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4274 if (!thread->static_data || !thread->static_data [idx])
4276 ptr = ((char*) thread->static_data [idx]) + off;
4277 mono_gc_bzero_atomic (ptr, data->size);
4281 * LOCKING: requires that threads_mutex is held
4284 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4286 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4291 OffsetSize *data = (OffsetSize *)user;
4292 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4293 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4296 if (!ctx->static_data || !ctx->static_data [idx])
4299 ptr = ((char*) ctx->static_data [idx]) + off;
4300 mono_gc_bzero_atomic (ptr, data->size);
4304 do_free_special_slot (guint32 offset, guint32 size)
4306 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4308 StaticDataInfo *info;
4310 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4311 info = &thread_static_info;
4312 sets = thread_reference_bitmaps;
4314 info = &context_static_info;
4315 sets = context_reference_bitmaps;
4318 guint32 data_offset = offset;
4319 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4320 OffsetSize data = { data_offset, size };
4322 clear_reference_bitmap (sets, data.offset, data.size);
4324 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4325 if (threads != NULL)
4326 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4328 if (contexts != NULL)
4329 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4332 if (!mono_runtime_is_shutting_down ()) {
4333 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4335 item->offset = offset;
4338 item->next = info->freelist;
4339 info->freelist = item;
4344 do_free_special (gpointer key, gpointer value, gpointer data)
4346 MonoClassField *field = (MonoClassField *)key;
4347 guint32 offset = GPOINTER_TO_UINT (value);
4350 size = mono_type_size (field->type, &align);
4351 do_free_special_slot (offset, size);
4355 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4357 mono_threads_lock ();
4359 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4361 mono_threads_unlock ();
4365 static void CALLBACK dummy_apc (ULONG_PTR param)
4371 * mono_thread_execute_interruption
4373 * Performs the operation that the requested thread state requires (abort,
4376 static MonoException*
4377 mono_thread_execute_interruption (void)
4379 MonoInternalThread *thread = mono_thread_internal_current ();
4380 MonoThread *sys_thread = mono_thread_current ();
4382 LOCK_THREAD (thread);
4384 /* MonoThread::interruption_requested can only be changed with atomics */
4385 if (mono_thread_clear_interruption_requested (thread)) {
4386 /* this will consume pending APC calls */
4388 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4390 /* Clear the interrupted flag of the thread so it can wait again */
4391 mono_thread_info_clear_self_interrupt ();
4394 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4395 if (sys_thread->pending_exception) {
4398 exc = sys_thread->pending_exception;
4399 sys_thread->pending_exception = NULL;
4401 UNLOCK_THREAD (thread);
4403 } else if (thread->state & (ThreadState_AbortRequested)) {
4404 UNLOCK_THREAD (thread);
4405 g_assert (sys_thread->pending_exception == NULL);
4406 if (thread->abort_exc == NULL) {
4408 * This might be racy, but it has to be called outside the lock
4409 * since it calls managed code.
4411 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4413 return thread->abort_exc;
4414 } else if (thread->state & (ThreadState_SuspendRequested)) {
4415 /* calls UNLOCK_THREAD (thread) */
4416 self_suspend_internal ();
4418 } else if (thread->thread_interrupt_requested) {
4420 thread->thread_interrupt_requested = FALSE;
4421 UNLOCK_THREAD (thread);
4423 return(mono_get_exception_thread_interrupted ());
4426 UNLOCK_THREAD (thread);
4432 * mono_thread_request_interruption
4434 * A signal handler can call this method to request the interruption of a
4435 * thread. The result of the interruption will depend on the current state of
4436 * the thread. If the result is an exception that needs to be throw, it is
4437 * provided as return value.
4440 mono_thread_request_interruption (gboolean running_managed)
4442 MonoInternalThread *thread = mono_thread_internal_current ();
4444 /* The thread may already be stopping */
4448 if (!mono_thread_set_interruption_requested (thread))
4451 if (!running_managed || is_running_protected_wrapper ()) {
4452 /* Can't stop while in unmanaged code. Increase the global interruption
4453 request count. When exiting the unmanaged method the count will be
4454 checked and the thread will be interrupted. */
4456 /* this will awake the thread if it is in WaitForSingleObject
4458 /* Our implementation of this function ignores the func argument */
4460 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4462 mono_thread_info_self_interrupt ();
4467 return mono_thread_execute_interruption ();
4471 /*This function should be called by a thread after it has exited all of
4472 * its handle blocks at interruption time.*/
4474 mono_thread_resume_interruption (gboolean exec)
4476 MonoInternalThread *thread = mono_thread_internal_current ();
4477 gboolean still_aborting;
4479 /* The thread may already be stopping */
4483 LOCK_THREAD (thread);
4484 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4485 UNLOCK_THREAD (thread);
4487 /*This can happen if the protected block called Thread::ResetAbort*/
4488 if (!still_aborting)
4491 if (!mono_thread_set_interruption_requested (thread))
4494 mono_thread_info_self_interrupt ();
4497 return mono_thread_execute_interruption ();
4502 gboolean mono_thread_interruption_requested ()
4504 if (thread_interruption_requested) {
4505 MonoInternalThread *thread = mono_thread_internal_current ();
4506 /* The thread may already be stopping */
4508 return mono_thread_get_interruption_requested (thread);
4513 static MonoException*
4514 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4516 MonoInternalThread *thread = mono_thread_internal_current ();
4518 /* The thread may already be stopping */
4521 if (!mono_thread_get_interruption_requested (thread))
4523 if (!bypass_abort_protection && is_running_protected_wrapper ())
4526 return mono_thread_execute_interruption ();
4530 * Performs the interruption of the current thread, if one has been requested,
4531 * and the thread is not running a protected wrapper.
4532 * Return the exception which needs to be thrown, if any.
4535 mono_thread_interruption_checkpoint (void)
4537 return mono_thread_interruption_checkpoint_request (FALSE);
4541 * Performs the interruption of the current thread, if one has been requested.
4542 * Return the exception which needs to be thrown, if any.
4545 mono_thread_force_interruption_checkpoint_noraise (void)
4547 return mono_thread_interruption_checkpoint_request (TRUE);
4551 * mono_set_pending_exception:
4553 * Set the pending exception of the current thread to EXC.
4554 * The exception will be thrown when execution returns to managed code.
4557 mono_set_pending_exception (MonoException *exc)
4559 MonoThread *thread = mono_thread_current ();
4561 /* The thread may already be stopping */
4565 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4567 mono_thread_request_interruption (FALSE);
4571 * mono_thread_interruption_request_flag:
4573 * Returns the address of a flag that will be non-zero if an interruption has
4574 * been requested for a thread. The thread to interrupt may not be the current
4575 * thread, so an additional call to mono_thread_interruption_requested() or
4576 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4579 gint32* mono_thread_interruption_request_flag ()
4581 return &thread_interruption_requested;
4585 mono_thread_init_apartment_state (void)
4588 MonoInternalThread* thread = mono_thread_internal_current ();
4590 /* Positive return value indicates success, either
4591 * S_OK if this is first CoInitialize call, or
4592 * S_FALSE if CoInitialize already called, but with same
4593 * threading model. A negative value indicates failure,
4594 * probably due to trying to change the threading model.
4596 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4597 ? COINIT_APARTMENTTHREADED
4598 : COINIT_MULTITHREADED) < 0) {
4599 thread->apartment_state = ThreadApartmentState_Unknown;
4605 mono_thread_cleanup_apartment_state (void)
4608 MonoInternalThread* thread = mono_thread_internal_current ();
4610 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4617 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4619 LOCK_THREAD (thread);
4620 thread->state |= state;
4621 UNLOCK_THREAD (thread);
4625 * mono_thread_test_and_set_state:
4627 * Test if current state of @thread include @test. If it does not, OR @set into the state.
4629 * Returns TRUE is @set was OR'd in.
4632 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4634 LOCK_THREAD (thread);
4636 if ((thread->state & test) != 0) {
4637 UNLOCK_THREAD (thread);
4641 thread->state |= set;
4642 UNLOCK_THREAD (thread);
4648 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4650 LOCK_THREAD (thread);
4651 thread->state &= ~state;
4652 UNLOCK_THREAD (thread);
4656 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4658 gboolean ret = FALSE;
4660 LOCK_THREAD (thread);
4662 if ((thread->state & test) != 0) {
4666 UNLOCK_THREAD (thread);
4672 self_interrupt_thread (void *_unused)
4675 MonoThreadInfo *info;
4677 exc = mono_thread_execute_interruption ();
4679 if (mono_threads_is_coop_enabled ()) {
4680 /* We can return from an async call in coop, as
4681 * it's simply called when exiting the safepoint */
4685 g_error ("%s: we can't resume from an async call", __func__);
4688 info = mono_thread_info_current ();
4690 /* We must use _with_context since we didn't trampoline into the runtime */
4691 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. */
4695 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4699 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4703 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4705 MonoJitInfo **dest = (MonoJitInfo **)data;
4711 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4713 MonoJitInfo *ji = NULL;
4718 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4719 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4720 * where we hold runtime locks.
4722 if (!mono_threads_is_coop_enabled ())
4723 mono_thread_info_set_is_async_context (TRUE);
4724 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4725 if (!mono_threads_is_coop_enabled ())
4726 mono_thread_info_set_is_async_context (FALSE);
4731 MonoInternalThread *thread;
4732 gboolean install_async_abort;
4733 MonoThreadInfoInterruptToken *interrupt_token;
4736 static SuspendThreadResult
4737 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4739 AbortThreadData *data = (AbortThreadData *)ud;
4740 MonoInternalThread *thread = data->thread;
4741 MonoJitInfo *ji = NULL;
4742 gboolean protected_wrapper;
4743 gboolean running_managed;
4745 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4746 return MonoResumeThread;
4748 /*someone is already interrupting it*/
4749 if (!mono_thread_set_interruption_requested (thread))
4750 return MonoResumeThread;
4752 ji = mono_thread_info_get_last_managed (info);
4753 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4754 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4756 if (!protected_wrapper && running_managed) {
4757 /*We are in managed code*/
4758 /*Set the thread to call */
4759 if (data->install_async_abort)
4760 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4761 return MonoResumeThread;
4764 * This will cause waits to be broken.
4765 * It will also prevent the thread from entering a wait, so if the thread returns
4766 * from the wait before it receives the abort signal, it will just spin in the wait
4767 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4770 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4772 return MonoResumeThread;
4777 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4779 AbortThreadData data;
4781 g_assert (thread != mono_thread_internal_current ());
4783 data.thread = thread;
4784 data.install_async_abort = install_async_abort;
4785 data.interrupt_token = NULL;
4787 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4788 if (data.interrupt_token)
4789 mono_thread_info_finish_interrupt (data.interrupt_token);
4790 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4794 self_abort_internal (MonoError *error)
4800 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4801 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4804 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.
4806 exc = mono_thread_request_interruption (TRUE);
4808 mono_error_set_exception_instance (error, exc);
4810 mono_thread_info_self_interrupt ();
4814 MonoInternalThread *thread;
4816 MonoThreadInfoInterruptToken *interrupt_token;
4817 } SuspendThreadData;
4819 static SuspendThreadResult
4820 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4822 SuspendThreadData *data = (SuspendThreadData *)ud;
4823 MonoInternalThread *thread = data->thread;
4824 MonoJitInfo *ji = NULL;
4825 gboolean protected_wrapper;
4826 gboolean running_managed;
4828 ji = mono_thread_info_get_last_managed (info);
4829 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4830 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4832 if (running_managed && !protected_wrapper) {
4833 if (mono_threads_is_coop_enabled ()) {
4834 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4835 return MonoResumeThread;
4837 thread->state &= ~ThreadState_SuspendRequested;
4838 thread->state |= ThreadState_Suspended;
4839 return KeepSuspended;
4842 mono_thread_set_interruption_requested (thread);
4843 if (data->interrupt)
4844 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4846 return MonoResumeThread;
4850 /* LOCKING: called with @thread synch_cs held, and releases it */
4852 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4854 SuspendThreadData data;
4856 g_assert (thread != mono_thread_internal_current ());
4858 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4860 thread->self_suspended = FALSE;
4862 data.thread = thread;
4863 data.interrupt = interrupt;
4864 data.interrupt_token = NULL;
4866 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4867 if (data.interrupt_token)
4868 mono_thread_info_finish_interrupt (data.interrupt_token);
4870 UNLOCK_THREAD (thread);
4873 /* LOCKING: called with @thread synch_cs held, and releases it */
4875 self_suspend_internal (void)
4877 MonoInternalThread *thread;
4879 MonoOSEventWaitRet res;
4881 thread = mono_thread_internal_current ();
4883 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4885 thread->self_suspended = TRUE;
4887 thread->state &= ~ThreadState_SuspendRequested;
4888 thread->state |= ThreadState_Suspended;
4890 UNLOCK_THREAD (thread);
4892 event = thread->suspended;
4895 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4896 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4901 suspend_for_shutdown_async_call (gpointer unused)
4904 mono_thread_info_yield ();
4907 static SuspendThreadResult
4908 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4910 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4911 return MonoResumeThread;
4915 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4917 g_assert (thread != mono_thread_internal_current ());
4919 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4923 * mono_thread_is_foreign:
4924 * @thread: the thread to query
4926 * This function allows one to determine if a thread was created by the mono runtime and has
4927 * a well defined lifecycle or it's a foreigh one, created by the native environment.
4929 * Returns: TRUE if @thread was not created by the runtime.
4932 mono_thread_is_foreign (MonoThread *thread)
4934 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4935 return info->runtime_thread == FALSE;
4939 * mono_add_joinable_thread:
4941 * Add TID to the list of joinable threads.
4942 * LOCKING: Acquires the threads lock.
4945 mono_threads_add_joinable_thread (gpointer tid)
4949 * We cannot detach from threads because it causes problems like
4950 * 2fd16f60/r114307. So we collect them and join them when
4951 * we have time (in he finalizer thread).
4953 joinable_threads_lock ();
4954 if (!joinable_threads)
4955 joinable_threads = g_hash_table_new (NULL, NULL);
4956 g_hash_table_insert (joinable_threads, tid, tid);
4957 joinable_thread_count ++;
4958 joinable_threads_unlock ();
4960 mono_gc_finalize_notify ();
4965 * mono_threads_join_threads:
4967 * Join all joinable threads. This is called from the finalizer thread.
4968 * LOCKING: Acquires the threads lock.
4971 mono_threads_join_threads (void)
4974 GHashTableIter iter;
4981 if (!joinable_thread_count)
4985 joinable_threads_lock ();
4987 if (g_hash_table_size (joinable_threads)) {
4988 g_hash_table_iter_init (&iter, joinable_threads);
4989 g_hash_table_iter_next (&iter, &key, (void**)&tid);
4990 thread = (pthread_t)tid;
4991 g_hash_table_remove (joinable_threads, key);
4992 joinable_thread_count --;
4995 joinable_threads_unlock ();
4997 if (thread != pthread_self ()) {
4999 /* This shouldn't block */
5000 mono_threads_join_lock ();
5001 mono_native_thread_join (thread);
5002 mono_threads_join_unlock ();
5015 * Wait for thread TID to exit.
5016 * LOCKING: Acquires the threads lock.
5019 mono_thread_join (gpointer tid)
5023 gboolean found = FALSE;
5025 joinable_threads_lock ();
5026 if (!joinable_threads)
5027 joinable_threads = g_hash_table_new (NULL, NULL);
5028 if (g_hash_table_lookup (joinable_threads, tid)) {
5029 g_hash_table_remove (joinable_threads, tid);
5030 joinable_thread_count --;
5033 joinable_threads_unlock ();
5036 thread = (pthread_t)tid;
5038 mono_native_thread_join (thread);
5044 mono_thread_internal_unhandled_exception (MonoObject* exc)
5046 MonoClass *klass = exc->vtable->klass;
5047 if (is_threadabort_exception (klass)) {
5048 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5049 } else if (!is_appdomainunloaded_exception (klass)
5050 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5051 mono_unhandled_exception (exc);
5052 if (mono_environment_exitcode_get () == 1) {
5053 mono_environment_exitcode_set (255);
5054 mono_invoke_unhandled_exception_hook (exc);
5055 g_assert_not_reached ();
5061 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5064 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5065 mono_error_set_pending_exception (&error);
5069 * mono_threads_attach_coop: called by native->managed wrappers
5073 * - @return: the original domain which needs to be restored, or NULL.
5076 * - @dummy: contains the original domain
5077 * - @return: a cookie containing current MonoThreadInfo*.
5080 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5083 gboolean fresh_thread = FALSE;
5086 /* Happens when called from AOTed code which is only used in the root domain. */
5087 domain = mono_get_root_domain ();
5092 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5093 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5094 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5095 * we're only responsible for making the cookie. */
5096 if (mono_threads_is_coop_enabled ()) {
5097 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
5098 fresh_thread = !info || !mono_thread_info_is_live (info);
5101 if (!mono_thread_internal_current ()) {
5102 mono_thread_attach_full (domain, FALSE);
5105 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5108 orig = mono_domain_get ();
5110 mono_domain_set (domain, TRUE);
5112 if (!mono_threads_is_coop_enabled ())
5113 return orig != domain ? orig : NULL;
5117 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5118 * return the right cookie. */
5119 return mono_threads_enter_gc_unsafe_region_cookie ();
5122 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5123 return mono_threads_enter_gc_unsafe_region (dummy);
5128 * mono_threads_detach_coop: called by native->managed wrappers
5131 * - @cookie: the original domain which needs to be restored, or NULL.
5135 * - @cookie: contains current MonoThreadInfo* if it was in BLOCKING mode, NULL otherwise
5136 * - @dummy: contains the original domain
5139 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5141 MonoDomain *domain, *orig;
5143 if (!mono_threads_is_coop_enabled ()) {
5144 orig = (MonoDomain*) cookie;
5146 mono_domain_set (orig, TRUE);
5148 orig = (MonoDomain*) *dummy;
5150 domain = mono_domain_get ();
5153 /* it won't do anything if cookie is NULL
5154 * thread state RUNNING -> (RUNNING|BLOCKING) */
5155 mono_threads_exit_gc_unsafe_region (cookie, dummy);
5157 if (orig != domain) {
5159 mono_domain_unset ();
5161 mono_domain_set (orig, TRUE);
5167 /* Returns TRUE if the current thread is ready to be interrupted. */
5169 mono_threads_is_ready_to_be_interrupted (void)
5171 MonoInternalThread *thread;
5173 thread = mono_thread_internal_current ();
5174 LOCK_THREAD (thread);
5175 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5176 UNLOCK_THREAD (thread);
5180 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5181 UNLOCK_THREAD (thread);
5185 UNLOCK_THREAD (thread);
5191 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5193 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5195 if (internal->thread_info) {
5196 g_string_append (text, ", state : ");
5197 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5200 if (internal->owned_mutexes) {
5203 g_string_append (text, ", owns : [");
5204 for (i = 0; i < internal->owned_mutexes->len; i++)
5205 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5206 g_string_append (text, "]");
5211 mono_thread_internal_is_current (MonoInternalThread *internal)
5213 g_assert (internal);
5214 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));