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/utils/unlocked.h>
49 #include <mono/metadata/w32handle.h>
50 #include <mono/metadata/w32event.h>
51 #include <mono/metadata/w32mutex.h>
53 #include <mono/metadata/reflection-internals.h>
54 #include <mono/metadata/abi-details.h>
55 #include <mono/metadata/w32error.h>
56 #include <mono/utils/w32api.h>
62 #if defined(HOST_WIN32)
66 #if defined(HOST_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
67 #define USE_TKILL_ON_ANDROID 1
73 #ifdef USE_TKILL_ON_ANDROID
74 extern int tkill (pid_t tid, int signal);
78 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
79 #define THREAD_DEBUG(a)
80 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
81 #define THREAD_WAIT_DEBUG(a)
82 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
83 #define LIBGC_DEBUG(a)
85 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
86 #define SPIN_LOCK(i) do { \
87 if (SPIN_TRYLOCK (i)) \
91 #define SPIN_UNLOCK(i) i = 0
93 #define LOCK_THREAD(thread) lock_thread((thread))
94 #define UNLOCK_THREAD(thread) unlock_thread((thread))
106 typedef struct _StaticDataFreeList StaticDataFreeList;
107 struct _StaticDataFreeList {
108 StaticDataFreeList *next;
116 StaticDataFreeList *freelist;
119 /* Controls access to the 'threads' hash table */
120 static void mono_threads_lock (void);
121 static void mono_threads_unlock (void);
122 static MonoCoopMutex threads_mutex;
124 /* Controls access to the 'joinable_threads' hash table */
125 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
126 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
127 static mono_mutex_t joinable_threads_mutex;
129 /* Holds current status of static data heap */
130 static StaticDataInfo thread_static_info;
131 static StaticDataInfo context_static_info;
133 /* The hash of existing threads (key is thread ID, value is
134 * MonoInternalThread*) that need joining before exit
136 static MonoGHashTable *threads=NULL;
138 /* List of app context GC handles.
139 * Added to from mono_threads_register_app_context ().
141 static GHashTable *contexts = NULL;
143 /* Cleanup queue for contexts. */
144 static MonoReferenceQueue *context_queue;
147 * Threads which are starting up and they are not in the 'threads' hash yet.
148 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
149 * Protected by mono_threads_lock ().
151 static MonoGHashTable *threads_starting_up = NULL;
154 /* Protected by the threads lock */
155 static GHashTable *joinable_threads;
156 static gint32 joinable_thread_count;
158 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
159 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
161 /* function called at thread start */
162 static MonoThreadStartCB mono_thread_start_cb = NULL;
164 /* function called at thread attach */
165 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
167 /* function called at thread cleanup */
168 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
170 /* The default stack size for each thread */
171 static guint32 default_stacksize = 0;
172 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
174 static void context_adjust_static_data (MonoAppContext *ctx);
175 static void mono_free_static_data (gpointer* static_data);
176 static void mono_init_static_data_info (StaticDataInfo *static_data);
177 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
178 static gboolean mono_thread_resume (MonoInternalThread* thread);
179 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
180 static void self_abort_internal (MonoError *error);
181 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
182 static void self_suspend_internal (void);
184 static MonoException* mono_thread_execute_interruption (void);
185 static void ref_stack_destroy (gpointer rs);
187 /* Spin lock for InterlockedXXX 64 bit functions */
188 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
189 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
190 static mono_mutex_t interlocked_mutex;
192 /* global count of thread interruptions requested */
193 static gint32 thread_interruption_requested = 0;
195 /* Event signaled when a thread changes its background mode */
196 static MonoOSEvent background_change_event;
198 static gboolean shutting_down = FALSE;
200 static gint32 managed_thread_id_counter = 0;
202 /* Class lazy loading functions */
203 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, "System", "AppDomainUnloadedException")
206 mono_threads_lock (void)
208 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
212 mono_threads_unlock (void)
214 mono_locks_coop_release (&threads_mutex, ThreadsLock);
219 get_next_managed_thread_id (void)
221 return InterlockedIncrement (&managed_thread_id_counter);
225 * We separate interruptions/exceptions into either sync (they can be processed anytime,
226 * normally as soon as they are set, and are set by the same thread) and async (they can't
227 * be processed inside abort protected blocks and are normally set by other threads). We
228 * can have both a pending sync and async interruption. In this case, the sync exception is
229 * processed first. Since we clean sync flag first, mono_thread_execute_interruption must
230 * also handle all sync type exceptions before the async type exceptions.
233 INTERRUPT_SYNC_REQUESTED_BIT = 0x1,
234 INTERRUPT_ASYNC_REQUESTED_BIT = 0x2,
235 INTERRUPT_REQUESTED_MASK = 0x3,
236 ABORT_PROT_BLOCK_SHIFT = 2,
237 ABORT_PROT_BLOCK_BITS = 8,
238 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
242 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
244 gsize state = thread->thread_state;
245 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
249 mono_threads_begin_abort_protected_block (void)
251 MonoInternalThread *thread = mono_thread_internal_current ();
252 gsize old_state, new_state;
255 old_state = thread->thread_state;
257 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
258 //bounds check abort_prot_count
259 g_assert (new_val > 0);
260 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
262 new_state = old_state + (1 << ABORT_PROT_BLOCK_SHIFT);
263 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
265 /* Defer async request since we won't be able to process until exiting the block */
266 if (new_val == 1 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
267 InterlockedDecrement (&thread_interruption_requested);
268 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);
269 if (thread_interruption_requested < 0)
270 g_warning ("bad thread_interruption_requested state");
272 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);
277 mono_thread_state_has_interruption (gsize state)
279 /* pending exception, self abort */
280 if (state & INTERRUPT_SYNC_REQUESTED_BIT)
283 /* abort, interruption, suspend */
284 if ((state & INTERRUPT_ASYNC_REQUESTED_BIT) && !(state & ABORT_PROT_BLOCK_MASK))
291 mono_threads_end_abort_protected_block (void)
293 MonoInternalThread *thread = mono_thread_internal_current ();
294 gsize old_state, new_state;
297 old_state = thread->thread_state;
299 //bounds check abort_prot_count
300 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
301 g_assert (new_val >= 0);
302 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
304 new_state = old_state - (1 << ABORT_PROT_BLOCK_SHIFT);
305 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
307 if (new_val == 0 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
308 InterlockedIncrement (&thread_interruption_requested);
309 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);
311 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);
314 return mono_thread_state_has_interruption (new_state);
318 mono_thread_get_interruption_requested (MonoInternalThread *thread)
320 gsize state = thread->thread_state;
322 return mono_thread_state_has_interruption (state);
326 * Returns TRUE is there was a state change
327 * We clear a single interruption request, sync has priority.
330 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
332 gsize old_state, new_state;
334 old_state = thread->thread_state;
336 // no interruption to process
337 if (!(old_state & INTERRUPT_SYNC_REQUESTED_BIT) &&
338 (!(old_state & INTERRUPT_ASYNC_REQUESTED_BIT) || (old_state & ABORT_PROT_BLOCK_MASK)))
341 if (old_state & INTERRUPT_SYNC_REQUESTED_BIT)
342 new_state = old_state & ~INTERRUPT_SYNC_REQUESTED_BIT;
344 new_state = old_state & ~INTERRUPT_ASYNC_REQUESTED_BIT;
345 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
347 InterlockedDecrement (&thread_interruption_requested);
348 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);
349 if (thread_interruption_requested < 0)
350 g_warning ("bad thread_interruption_requested state");
354 /* Returns TRUE is there was a state change and the interruption can be processed */
356 mono_thread_set_interruption_requested (MonoInternalThread *thread)
358 //always force when the current thread is doing it to itself.
359 gboolean sync = thread == mono_thread_internal_current ();
360 gsize old_state, new_state;
362 old_state = thread->thread_state;
365 if ((sync && (old_state & INTERRUPT_SYNC_REQUESTED_BIT)) ||
366 (!sync && (old_state & INTERRUPT_ASYNC_REQUESTED_BIT)))
370 new_state = old_state | INTERRUPT_SYNC_REQUESTED_BIT;
372 new_state = old_state | INTERRUPT_ASYNC_REQUESTED_BIT;
373 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
375 if (sync || !(new_state & ABORT_PROT_BLOCK_MASK)) {
376 InterlockedIncrement (&thread_interruption_requested);
377 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);
379 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);
382 return sync || !(new_state & ABORT_PROT_BLOCK_MASK);
385 static inline MonoNativeThreadId
386 thread_get_tid (MonoInternalThread *thread)
388 /* We store the tid as a guint64 to keep the object layout constant between platforms */
389 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
392 static void ensure_synch_cs_set (MonoInternalThread *thread)
394 MonoCoopMutex *synch_cs;
396 if (thread->synch_cs != NULL) {
400 synch_cs = g_new0 (MonoCoopMutex, 1);
401 mono_coop_mutex_init_recursive (synch_cs);
403 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
404 synch_cs, NULL) != NULL) {
405 /* Another thread must have installed this CS */
406 mono_coop_mutex_destroy (synch_cs);
412 lock_thread (MonoInternalThread *thread)
414 if (!thread->synch_cs)
415 ensure_synch_cs_set (thread);
417 g_assert (thread->synch_cs);
419 mono_coop_mutex_lock (thread->synch_cs);
423 unlock_thread (MonoInternalThread *thread)
425 mono_coop_mutex_unlock (thread->synch_cs);
428 static inline gboolean
429 is_appdomainunloaded_exception (MonoClass *klass)
431 return klass == mono_class_get_appdomain_unloaded_exception_class ();
434 static inline gboolean
435 is_threadabort_exception (MonoClass *klass)
437 return klass == mono_defaults.threadabortexception_class;
441 * A special static data offset (guint32) consists of 3 parts:
443 * [0] 6-bit index into the array of chunks.
444 * [6] 25-bit offset into the array.
445 * [31] Bit indicating thread or context static.
450 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
461 } SpecialStaticOffset;
463 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
464 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
466 #define MAKE_SPECIAL_STATIC_OFFSET(idx, off, ty) \
467 ((SpecialStaticOffset) { .fields = { .index = (idx), .offset = (off), .type = (ty) } }.raw)
468 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
469 (((SpecialStaticOffset *) &(x))->fields.f)
472 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
474 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
476 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
477 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
479 return ((char *) thread->static_data [idx]) + off;
483 get_context_static_data (MonoAppContext *ctx, guint32 offset)
485 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
487 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
488 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
490 return ((char *) ctx->static_data [idx]) + off;
494 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
496 static MonoClassField *current_thread_field = NULL;
500 if (!current_thread_field) {
501 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
502 g_assert (current_thread_field);
505 mono_class_vtable (domain, mono_defaults.thread_class);
506 mono_domain_lock (domain);
507 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
508 mono_domain_unlock (domain);
511 return (MonoThread **)get_thread_static_data (thread, offset);
515 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
517 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
519 g_assert (current->obj.vtable->domain == domain);
521 g_assert (!*current_thread_ptr);
522 *current_thread_ptr = current;
526 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
532 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
535 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
536 /* only possible failure mode is OOM, from which we don't expect to recover. */
537 mono_error_assert_ok (&error);
539 MONO_OBJECT_SETREF (thread, internal_thread, internal);
544 static MonoInternalThread*
545 create_internal_thread_object (void)
548 MonoInternalThread *thread;
551 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
552 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
553 /* only possible failure mode is OOM, from which we don't exect to recover */
554 mono_error_assert_ok (&error);
556 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
557 mono_coop_mutex_init_recursive (thread->synch_cs);
559 thread->apartment_state = ThreadApartmentState_Unknown;
560 thread->managed_id = get_next_managed_thread_id ();
561 if (mono_gc_is_moving ()) {
562 thread->thread_pinning_ref = thread;
563 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
566 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
568 thread->suspended = g_new0 (MonoOSEvent, 1);
569 mono_os_event_init (thread->suspended, TRUE);
575 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
579 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
580 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
581 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
586 g_assert (internal->native_handle);
588 res = SetThreadPriority (internal->native_handle, priority - 2);
590 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
591 #else /* HOST_WIN32 */
594 struct sched_param param;
597 tid = thread_get_tid (internal);
599 res = pthread_getschedparam (tid, &policy, ¶m);
601 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
603 #ifdef _POSIX_PRIORITY_SCHEDULING
606 /* Necessary to get valid priority range */
608 min = sched_get_priority_min (policy);
609 max = sched_get_priority_max (policy);
611 if (max > 0 && min >= 0 && max > min) {
612 double srange, drange, sposition, dposition;
613 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
615 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
616 dposition = (sposition / srange) * drange;
617 param.sched_priority = (int)(dposition + min);
624 param.sched_priority = 50;
630 param.sched_priority = 0;
633 g_warning ("%s: unknown policy %d", __func__, policy);
638 res = pthread_setschedparam (tid, policy, ¶m);
641 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
644 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
646 #endif /* HOST_WIN32 */
650 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
653 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain)
655 MonoThreadInfo *info;
656 MonoInternalThread *internal;
657 MonoDomain *domain, *root_domain;
661 info = mono_thread_info_current ();
664 internal = thread->internal_thread;
667 /* It is needed to store the MonoInternalThread on the MonoThreadInfo, because of the following case:
668 * - the MonoInternalThread TLS key is destroyed: set it to NULL
669 * - the MonoThreadInfo TLS key is destroyed: calls mono_thread_info_detach
670 * - it calls MonoThreadInfoCallbacks.thread_detach
671 * - mono_thread_internal_current returns NULL -> fails to detach the MonoInternalThread. */
672 mono_thread_info_set_internal_thread_gchandle (info, mono_gchandle_new ((MonoObject*) internal, FALSE));
674 internal->handle = mono_threads_open_thread_handle (info->handle);
676 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
678 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
679 internal->thread_info = info;
680 internal->small_id = info->small_id;
682 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
684 SET_CURRENT_OBJECT (internal);
686 domain = mono_object_domain (thread);
688 mono_thread_push_appdomain_ref (domain);
689 if (!mono_domain_set (domain, force_domain)) {
690 mono_thread_pop_appdomain_ref ();
694 mono_threads_lock ();
696 if (threads_starting_up)
697 mono_g_hash_table_remove (threads_starting_up, thread);
699 if (shutting_down && !force_attach) {
700 mono_threads_unlock ();
701 mono_thread_pop_appdomain_ref ();
706 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
709 /* We don't need to duplicate thread->handle, because it is
710 * only closed when the thread object is finalized by the GC. */
711 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
713 /* We have to do this here because mono_thread_start_cb
714 * requires that root_domain_thread is set up. */
715 if (thread_static_info.offset || thread_static_info.idx > 0) {
716 /* get the current allocated size */
717 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
718 mono_alloc_static_data (&internal->static_data, offset, TRUE);
721 mono_threads_unlock ();
723 root_domain = mono_get_root_domain ();
725 g_assert (!internal->root_domain_thread);
726 if (domain != root_domain)
727 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
729 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
731 if (domain != root_domain)
732 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
734 set_current_thread_for_domain (domain, internal, thread);
736 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
742 mono_thread_detach_internal (MonoInternalThread *thread)
746 g_assert (thread != NULL);
747 SET_CURRENT_OBJECT (thread);
749 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
752 mono_w32mutex_abandon ();
755 if (thread->abort_state_handle) {
756 mono_gchandle_free (thread->abort_state_handle);
757 thread->abort_state_handle = 0;
760 thread->abort_exc = NULL;
761 thread->current_appcontext = NULL;
764 * thread->synch_cs can be NULL if this was called after
765 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
766 * This can happen only during shutdown.
767 * The shutting_down flag is not always set, so we can't assert on it.
769 if (thread->synch_cs)
770 LOCK_THREAD (thread);
772 thread->state |= ThreadState_Stopped;
773 thread->state &= ~ThreadState_Background;
775 if (thread->synch_cs)
776 UNLOCK_THREAD (thread);
779 An interruption request has leaked to cleanup. Adjust the global counter.
781 This can happen is the abort source thread finds the abortee (this) thread
782 in unmanaged code. If this thread never trips back to managed code or check
783 the local flag it will be left set and positively unbalance the global counter.
785 Leaving the counter unbalanced will cause a performance degradation since all threads
786 will now keep checking their local flags all the time.
788 mono_thread_clear_interruption_requested (thread);
790 mono_threads_lock ();
794 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
795 /* We have to check whether the thread object for the
796 * tid is still the same in the table because the
797 * thread might have been destroyed and the tid reused
798 * in the meantime, in which case the tid would be in
799 * the table, but with another thread object.
803 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
807 mono_threads_unlock ();
809 /* Don't close the handle here, wait for the object finalizer
810 * to do it. Otherwise, the following race condition applies:
812 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
814 * 2) Some other handle is reassigned the same slot
816 * 3) Another thread tries to join the first thread, and
817 * blocks waiting for the reassigned handle to be signalled
818 * (which might never happen). This is possible, because the
819 * thread calling Join() still has a reference to the first
823 /* if the thread is not in the hash it has been removed already */
825 mono_domain_unset ();
826 mono_memory_barrier ();
828 if (mono_thread_cleanup_fn)
829 mono_thread_cleanup_fn (thread_get_tid (thread));
834 mono_release_type_locks (thread);
836 /* Can happen when we attach the profiler helper thread in order to heapshot. */
837 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
838 MONO_PROFILER_RAISE (thread_stopped, (thread->tid));
840 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
843 * This will signal async signal handlers that the thread has exited.
844 * The profiler callback needs this to be set, so it cannot be done earlier.
846 mono_domain_unset ();
847 mono_memory_barrier ();
849 if (thread == mono_thread_internal_current ())
850 mono_thread_pop_appdomain_ref ();
852 mono_free_static_data (thread->static_data);
853 thread->static_data = NULL;
854 ref_stack_destroy (thread->appdomain_refs);
855 thread->appdomain_refs = NULL;
857 g_assert (thread->suspended);
858 mono_os_event_destroy (thread->suspended);
859 g_free (thread->suspended);
860 thread->suspended = NULL;
862 if (mono_thread_cleanup_fn)
863 mono_thread_cleanup_fn (thread_get_tid (thread));
865 mono_memory_barrier ();
867 if (mono_gc_is_moving ()) {
868 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
869 thread->thread_pinning_ref = NULL;
873 SET_CURRENT_OBJECT (NULL);
874 mono_domain_unset ();
876 mono_thread_info_unset_internal_thread_gchandle ((MonoThreadInfo*) thread->thread_info);
878 /* Don't need to close the handle to this thread, even though we took a
879 * reference in mono_thread_attach (), because the GC will do it
880 * when the Thread object is finalised.
887 MonoObject *start_delegate;
888 MonoObject *start_delegate_arg;
889 MonoThreadStart start_func;
890 gpointer start_func_arg;
891 gboolean force_attach;
893 MonoCoopSem registered;
896 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
899 MonoThreadStart start_func;
900 void *start_func_arg;
903 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
907 MonoInternalThread *internal;
908 MonoObject *start_delegate;
909 MonoObject *start_delegate_arg;
912 thread = start_info->thread;
913 internal = thread->internal_thread;
914 domain = mono_object_domain (start_info->thread);
916 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
918 if (!mono_thread_attach_internal (thread, start_info->force_attach, FALSE)) {
919 start_info->failed = TRUE;
921 mono_coop_sem_post (&start_info->registered);
923 if (InterlockedDecrement (&start_info->ref) == 0) {
924 mono_coop_sem_destroy (&start_info->registered);
931 mono_thread_internal_set_priority (internal, internal->priority);
935 start_delegate = start_info->start_delegate;
936 start_delegate_arg = start_info->start_delegate_arg;
937 start_func = start_info->start_func;
938 start_func_arg = start_info->start_func_arg;
940 /* This MUST be called before any managed code can be
941 * executed, as it calls the callback function that (for the
942 * jit) sets the lmf marker.
945 if (mono_thread_start_cb)
946 mono_thread_start_cb (tid, stack_ptr, start_func);
948 /* On 2.0 profile (and higher), set explicitly since state might have been
950 if (internal->apartment_state == ThreadApartmentState_Unknown)
951 internal->apartment_state = ThreadApartmentState_MTA;
953 mono_thread_init_apartment_state ();
955 /* Let the thread that called Start() know we're ready */
956 mono_coop_sem_post (&start_info->registered);
958 if (InterlockedDecrement (&start_info->ref) == 0) {
959 mono_coop_sem_destroy (&start_info->registered);
963 /* start_info is not valid anymore */
967 * Call this after calling start_notify, since the profiler callback might want
968 * to lock the thread, and the lock is held by thread_start () which waits for
971 MONO_PROFILER_RAISE (thread_started, (tid));
973 /* if the name was set before starting, we didn't invoke the profiler callback */
974 if (internal->name) {
975 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
976 MONO_PROFILER_RAISE (thread_name, (internal->tid, tname));
977 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
981 /* start_func is set only for unmanaged start functions */
983 start_func (start_func_arg);
987 g_assert (start_delegate != NULL);
989 /* we may want to handle the exception here. See comment below on unhandled exceptions */
990 args [0] = (gpointer) start_delegate_arg;
991 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
993 if (!mono_error_ok (&error)) {
994 MonoException *ex = mono_error_convert_to_exception (&error);
996 g_assert (ex != NULL);
997 MonoClass *klass = mono_object_get_class (&ex->object);
998 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
999 !is_threadabort_exception (klass)) {
1000 mono_unhandled_exception (&ex->object);
1001 mono_invoke_unhandled_exception_hook (&ex->object);
1002 g_assert_not_reached ();
1005 mono_error_cleanup (&error);
1009 /* If the thread calls ExitThread at all, this remaining code
1010 * will not be executed, but the main thread will eventually
1011 * call mono_thread_detach_internal() on this thread's behalf.
1014 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
1016 /* Do any cleanup needed for apartment state. This
1017 * cannot be done in mono_thread_detach_internal since
1018 * mono_thread_detach_internal could be called for a
1019 * thread other than the current thread.
1020 * mono_thread_cleanup_apartment_state cleans up apartment
1021 * for the current thead */
1022 mono_thread_cleanup_apartment_state ();
1024 mono_thread_detach_internal (internal);
1032 start_wrapper (gpointer data)
1034 StartInfo *start_info;
1035 MonoThreadInfo *info;
1038 start_info = (StartInfo*) data;
1039 g_assert (start_info);
1041 info = mono_thread_info_attach ();
1042 info->runtime_thread = TRUE;
1044 /* Run the actual main function of the thread */
1045 res = start_wrapper_internal (start_info, info->stack_end);
1047 mono_thread_info_exit (res);
1049 g_assert_not_reached ();
1055 * Common thread creation code.
1056 * LOCKING: Acquires the threads lock.
1059 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
1060 MonoThreadCreateFlags flags, MonoError *error)
1062 StartInfo *start_info = NULL;
1063 MonoNativeThreadId tid;
1065 gsize stack_set_size;
1068 g_assert (!start_func && !start_func_arg);
1070 g_assert (!start_delegate);
1072 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
1073 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
1074 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1076 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
1077 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
1078 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1082 * Join joinable threads to prevent running out of threads since the finalizer
1083 * thread might be blocked/backlogged.
1085 mono_threads_join_threads ();
1089 mono_threads_lock ();
1090 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
1091 mono_threads_unlock ();
1094 if (threads_starting_up == NULL) {
1095 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
1097 mono_g_hash_table_insert (threads_starting_up, thread, thread);
1098 mono_threads_unlock ();
1100 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
1101 if (internal->threadpool_thread)
1102 mono_thread_set_state (internal, ThreadState_Background);
1104 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
1106 start_info = g_new0 (StartInfo, 1);
1107 start_info->ref = 2;
1108 start_info->thread = thread;
1109 start_info->start_delegate = start_delegate;
1110 start_info->start_delegate_arg = thread->start_obj;
1111 start_info->start_func = start_func;
1112 start_info->start_func_arg = start_func_arg;
1113 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
1114 start_info->failed = FALSE;
1115 mono_coop_sem_init (&start_info->registered, 0);
1117 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
1118 stack_set_size = default_stacksize_for_thread (internal);
1122 if (!mono_thread_platform_create_thread (start_wrapper, start_info, &stack_set_size, &tid)) {
1123 /* The thread couldn't be created, so set an exception */
1124 mono_threads_lock ();
1125 mono_g_hash_table_remove (threads_starting_up, thread);
1126 mono_threads_unlock ();
1127 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
1128 /* ref is not going to be decremented in start_wrapper_internal */
1129 InterlockedDecrement (&start_info->ref);
1134 internal->stack_size = (int) stack_set_size;
1136 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
1139 * Wait for the thread to set up its TLS data etc, so
1140 * theres no potential race condition if someone tries
1141 * to look up the data believing the thread has
1145 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
1147 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));
1149 ret = !start_info->failed;
1152 if (InterlockedDecrement (&start_info->ref) == 0) {
1153 mono_coop_sem_destroy (&start_info->registered);
1154 g_free (start_info);
1161 * mono_thread_new_init:
1164 mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1166 if (mono_thread_start_cb) {
1167 mono_thread_start_cb (tid, stack_start, func);
1172 * mono_threads_set_default_stacksize:
1175 mono_threads_set_default_stacksize (guint32 stacksize)
1177 default_stacksize = stacksize;
1181 * mono_threads_get_default_stacksize:
1184 mono_threads_get_default_stacksize (void)
1186 return default_stacksize;
1190 * mono_thread_create_internal:
1192 * ARG should not be a GC reference.
1195 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1198 MonoInternalThread *internal;
1203 internal = create_internal_thread_object ();
1205 thread = create_thread_object (domain, internal);
1207 LOCK_THREAD (internal);
1209 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1211 UNLOCK_THREAD (internal);
1213 return_val_if_nok (error, NULL);
1218 * mono_thread_create:
1221 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1224 if (!mono_thread_create_checked (domain, func, arg, &error))
1225 mono_error_cleanup (&error);
1229 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1231 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1235 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1237 MonoInternalThread *internal;
1239 MonoThreadInfo *info;
1240 MonoNativeThreadId tid;
1242 if (mono_thread_internal_current_is_attached ()) {
1243 if (domain != mono_domain_get ())
1244 mono_domain_set (domain, TRUE);
1245 /* Already attached */
1246 return mono_thread_current ();
1249 info = mono_thread_info_attach ();
1252 tid=mono_native_thread_id_get ();
1254 internal = create_internal_thread_object ();
1256 thread = create_thread_object (domain, internal);
1258 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1259 /* Mono is shutting down, so just wait for the end */
1261 mono_thread_info_sleep (10000, NULL);
1264 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1266 if (mono_thread_attach_cb)
1267 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), info->stack_end);
1269 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1270 if (!mono_thread_info_current ()->tools_thread)
1271 MONO_PROFILER_RAISE (thread_started, (MONO_NATIVE_THREAD_ID_TO_UINT (tid)));
1277 * mono_thread_attach:
1280 mono_thread_attach (MonoDomain *domain)
1282 return mono_thread_attach_full (domain, FALSE);
1286 * mono_thread_detach:
1289 mono_thread_detach (MonoThread *thread)
1292 mono_thread_detach_internal (thread->internal_thread);
1296 * mono_thread_detach_if_exiting:
1298 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1299 * This should be used at the end of embedding code which calls into managed code, and which
1300 * can be called from pthread dtors, like <code>dealloc:</code> implementations in Objective-C.
1303 mono_thread_detach_if_exiting (void)
1305 if (mono_thread_info_is_exiting ()) {
1306 MonoInternalThread *thread;
1308 thread = mono_thread_internal_current ();
1310 mono_thread_detach_internal (thread);
1311 mono_thread_info_detach ();
1319 mono_thread_internal_current_is_attached (void)
1321 MonoInternalThread *internal;
1323 internal = GET_CURRENT_OBJECT ();
1334 mono_thread_exit (void)
1336 MonoInternalThread *thread = mono_thread_internal_current ();
1338 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1340 mono_thread_detach_internal (thread);
1342 /* we could add a callback here for embedders to use. */
1343 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1344 exit (mono_environment_exitcode_get ());
1346 mono_thread_info_exit (0);
1350 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1352 MonoInternalThread *internal;
1354 internal = create_internal_thread_object ();
1356 internal->state = ThreadState_Unstarted;
1358 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1362 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1364 return mono_thread_current ();
1368 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1372 MonoInternalThread *internal;
1375 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1377 if (!this_obj->internal_thread)
1378 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1379 internal = this_obj->internal_thread;
1381 LOCK_THREAD (internal);
1383 if ((internal->state & ThreadState_Unstarted) == 0) {
1384 UNLOCK_THREAD (internal);
1385 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1389 if ((internal->state & ThreadState_Aborted) != 0) {
1390 UNLOCK_THREAD (internal);
1394 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1396 mono_error_cleanup (&error);
1397 UNLOCK_THREAD (internal);
1401 internal->state &= ~ThreadState_Unstarted;
1403 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1405 UNLOCK_THREAD (internal);
1406 return internal->handle;
1410 * This is called from the finalizer of the internal thread object.
1413 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1415 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1418 * Since threads keep a reference to their thread object while running, by
1419 * the time this function is called, the thread has already exited/detached,
1420 * i.e. mono_thread_detach_internal () has ran. The exception is during
1421 * shutdown, when mono_thread_detach_internal () can be called after this.
1423 if (this_obj->handle) {
1424 mono_threads_close_thread_handle (this_obj->handle);
1425 this_obj->handle = NULL;
1429 CloseHandle (this_obj->native_handle);
1432 if (this_obj->synch_cs) {
1433 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1434 this_obj->synch_cs = NULL;
1435 mono_coop_mutex_destroy (synch_cs);
1439 if (this_obj->name) {
1440 void *name = this_obj->name;
1441 this_obj->name = NULL;
1447 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1450 MonoInternalThread *thread = mono_thread_internal_current ();
1452 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1454 if (mono_thread_current_check_pending_interrupt ())
1458 gboolean alerted = FALSE;
1460 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1462 res = mono_thread_info_sleep (ms, &alerted);
1464 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1467 MonoException* exc = mono_thread_execute_interruption ();
1469 mono_raise_exception (exc);
1471 // FIXME: !MONO_INFINITE_WAIT
1472 if (ms != MONO_INFINITE_WAIT)
1481 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1486 ves_icall_System_Threading_Thread_GetDomainID (void)
1488 return mono_domain_get()->domain_id;
1492 ves_icall_System_Threading_Thread_Yield (void)
1494 return mono_thread_info_yield ();
1498 * mono_thread_get_name:
1500 * Return the name of the thread. NAME_LEN is set to the length of the name.
1501 * Return NULL if the thread has no name. The returned memory is owned by the
1505 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1509 LOCK_THREAD (this_obj);
1511 if (!this_obj->name) {
1515 *name_len = this_obj->name_len;
1516 res = g_new (gunichar2, this_obj->name_len);
1517 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1520 UNLOCK_THREAD (this_obj);
1526 * mono_thread_get_name_utf8:
1527 * \returns the name of the thread in UTF-8.
1528 * Return NULL if the thread has no name.
1529 * The returned memory is owned by the caller.
1532 mono_thread_get_name_utf8 (MonoThread *thread)
1537 MonoInternalThread *internal = thread->internal_thread;
1538 if (internal == NULL)
1541 LOCK_THREAD (internal);
1543 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1545 UNLOCK_THREAD (internal);
1551 * mono_thread_get_managed_id:
1552 * \returns the \c Thread.ManagedThreadId value of \p thread.
1553 * Returns \c -1 if \p thread is NULL.
1556 mono_thread_get_managed_id (MonoThread *thread)
1561 MonoInternalThread *internal = thread->internal_thread;
1562 if (internal == NULL)
1565 int32_t id = internal->managed_id;
1571 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1576 error_init (&error);
1578 LOCK_THREAD (this_obj);
1580 if (!this_obj->name)
1583 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1585 UNLOCK_THREAD (this_obj);
1587 if (mono_error_set_pending_exception (&error))
1594 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1596 LOCK_THREAD (this_obj);
1601 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1602 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1603 UNLOCK_THREAD (this_obj);
1605 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1608 if (this_obj->name) {
1609 g_free (this_obj->name);
1610 this_obj->name_len = 0;
1613 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1614 this_obj->name_len = mono_string_length (name);
1617 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1620 this_obj->name = NULL;
1623 UNLOCK_THREAD (this_obj);
1625 if (this_obj->name && this_obj->tid) {
1626 char *tname = mono_string_to_utf8_checked (name, error);
1627 return_if_nok (error);
1628 MONO_PROFILER_RAISE (thread_name, (this_obj->tid, tname));
1629 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1635 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1638 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1639 mono_error_set_pending_exception (&error);
1643 * ves_icall_System_Threading_Thread_GetPriority_internal:
1644 * @param this_obj: The MonoInternalThread on which to operate.
1646 * Gets the priority of the given thread.
1647 * @return: The priority of the given thread.
1650 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1653 MonoInternalThread *internal = this_obj->internal_thread;
1655 LOCK_THREAD (internal);
1656 priority = internal->priority;
1657 UNLOCK_THREAD (internal);
1663 * ves_icall_System_Threading_Thread_SetPriority_internal:
1664 * @param this_obj: The MonoInternalThread on which to operate.
1665 * @param priority: The priority to set.
1667 * Sets the priority of the given thread.
1670 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1672 MonoInternalThread *internal = this_obj->internal_thread;
1674 LOCK_THREAD (internal);
1675 internal->priority = priority;
1676 if (internal->thread_info != NULL)
1677 mono_thread_internal_set_priority (internal, priority);
1678 UNLOCK_THREAD (internal);
1681 /* If the array is already in the requested domain, we just return it,
1682 otherwise we return a copy in that domain. */
1684 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1692 if (mono_object_domain (arr) == domain)
1695 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1696 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1701 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1704 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1705 mono_error_set_pending_exception (&error);
1710 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1713 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1714 mono_error_set_pending_exception (&error);
1719 * mono_thread_current:
1722 mono_thread_current (void)
1724 MonoDomain *domain = mono_domain_get ();
1725 MonoInternalThread *internal = mono_thread_internal_current ();
1726 MonoThread **current_thread_ptr;
1728 g_assert (internal);
1729 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1731 if (!*current_thread_ptr) {
1732 g_assert (domain != mono_get_root_domain ());
1733 *current_thread_ptr = create_thread_object (domain, internal);
1735 return *current_thread_ptr;
1738 /* Return the thread object belonging to INTERNAL in the current domain */
1740 mono_thread_current_for_thread (MonoInternalThread *internal)
1742 MonoDomain *domain = mono_domain_get ();
1743 MonoThread **current_thread_ptr;
1745 g_assert (internal);
1746 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1748 if (!*current_thread_ptr) {
1749 g_assert (domain != mono_get_root_domain ());
1750 *current_thread_ptr = create_thread_object (domain, internal);
1752 return *current_thread_ptr;
1756 mono_thread_internal_current (void)
1758 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1759 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1763 static MonoThreadInfoWaitRet
1764 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1767 MonoThreadInfoWaitRet ret;
1774 start = (ms == -1) ? 0 : mono_msec_ticks ();
1777 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1780 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1783 exc = mono_thread_execute_interruption ();
1785 mono_error_set_exception_instance (error, exc);
1792 /* Re-calculate ms according to the time passed */
1793 diff_ms = (gint32)(mono_msec_ticks () - start);
1794 if (diff_ms >= ms) {
1795 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1798 wait = ms - diff_ms;
1805 ves_icall_System_Threading_Thread_Join_internal(MonoThread *this_obj, int ms)
1807 MonoInternalThread *thread = this_obj->internal_thread;
1808 MonoThreadHandle *handle = thread->handle;
1809 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1813 if (mono_thread_current_check_pending_interrupt ())
1816 LOCK_THREAD (thread);
1818 if ((thread->state & ThreadState_Unstarted) != 0) {
1819 UNLOCK_THREAD (thread);
1821 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1825 UNLOCK_THREAD (thread);
1828 ms=MONO_INFINITE_WAIT;
1830 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1832 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1834 ret=mono_join_uninterrupted (handle, ms, &error);
1836 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1838 mono_error_set_pending_exception (&error);
1840 if(ret==MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1841 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1846 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1851 #define MANAGED_WAIT_FAILED 0x7fffffff
1854 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1856 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1857 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1858 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1859 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1860 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1861 return WAIT_IO_COMPLETION;
1862 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1863 return WAIT_TIMEOUT;
1864 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1865 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1866 return MANAGED_WAIT_FAILED;
1868 g_error ("%s: unknown val value %d", __func__, val);
1873 ves_icall_System_Threading_WaitHandle_Wait_internal (gpointer *handles, gint32 numhandles, MonoBoolean waitall, gint32 timeout, MonoError *error)
1875 MonoW32HandleWaitRet ret;
1876 MonoInternalThread *thread;
1879 guint32 timeoutLeft;
1881 /* Do this WaitSleepJoin check before creating objects */
1882 if (mono_thread_current_check_pending_interrupt ())
1883 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1885 thread = mono_thread_internal_current ();
1887 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1890 timeout = MONO_INFINITE_WAIT;
1891 if (timeout != MONO_INFINITE_WAIT)
1892 start = mono_msec_ticks ();
1894 timeoutLeft = timeout;
1899 if (numhandles != 1)
1900 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, timeoutLeft, TRUE), numhandles);
1902 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], timeoutLeft, TRUE), 1);
1904 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1905 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, timeoutLeft, TRUE);
1906 #endif /* HOST_WIN32 */
1909 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1912 exc = mono_thread_execute_interruption ();
1914 mono_error_set_exception_instance (error, exc);
1918 if (timeout != MONO_INFINITE_WAIT) {
1921 elapsed = mono_msec_ticks () - start;
1922 if (elapsed >= timeout) {
1923 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1927 timeoutLeft = timeout - elapsed;
1931 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1933 return map_native_wait_result_to_managed (ret, numhandles);
1937 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (gpointer toSignal, gpointer toWait, gint32 ms, MonoError *error)
1939 MonoW32HandleWaitRet ret;
1940 MonoInternalThread *thread = mono_thread_internal_current ();
1943 ms = MONO_INFINITE_WAIT;
1945 if (mono_thread_current_check_pending_interrupt ())
1946 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1948 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1952 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
1954 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
1958 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1960 return map_native_wait_result_to_managed (ret, 1);
1963 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1965 return InterlockedIncrement (location);
1968 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1970 #if SIZEOF_VOID_P == 4
1971 if (G_UNLIKELY ((size_t)location & 0x7)) {
1973 mono_interlocked_lock ();
1976 mono_interlocked_unlock ();
1980 return InterlockedIncrement64 (location);
1983 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1985 return InterlockedDecrement(location);
1988 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1990 #if SIZEOF_VOID_P == 4
1991 if (G_UNLIKELY ((size_t)location & 0x7)) {
1993 mono_interlocked_lock ();
1996 mono_interlocked_unlock ();
2000 return InterlockedDecrement64 (location);
2003 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2005 return InterlockedExchange(location, value);
2008 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2011 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2012 mono_gc_wbarrier_generic_nostore (location);
2016 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2018 return InterlockedExchangePointer(location, value);
2021 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2023 IntFloatUnion val, ret;
2026 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2032 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2034 #if SIZEOF_VOID_P == 4
2035 if (G_UNLIKELY ((size_t)location & 0x7)) {
2037 mono_interlocked_lock ();
2040 mono_interlocked_unlock ();
2044 return InterlockedExchange64 (location, value);
2048 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2050 LongDoubleUnion val, ret;
2053 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2058 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2060 return InterlockedCompareExchange(location, value, comparand);
2063 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2065 gint32 r = InterlockedCompareExchange(location, value, comparand);
2066 *success = r == comparand;
2070 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2073 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2074 mono_gc_wbarrier_generic_nostore (location);
2078 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2080 return InterlockedCompareExchangePointer(location, value, comparand);
2083 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2085 IntFloatUnion val, ret, cmp;
2088 cmp.fval = comparand;
2089 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2095 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2097 #if SIZEOF_VOID_P == 8
2098 LongDoubleUnion val, comp, ret;
2101 comp.fval = comparand;
2102 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2108 mono_interlocked_lock ();
2110 if (old == comparand)
2112 mono_interlocked_unlock ();
2119 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2121 #if SIZEOF_VOID_P == 4
2122 if (G_UNLIKELY ((size_t)location & 0x7)) {
2124 mono_interlocked_lock ();
2126 if (old == comparand)
2128 mono_interlocked_unlock ();
2132 return InterlockedCompareExchange64 (location, value, comparand);
2136 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2139 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2140 mono_gc_wbarrier_generic_nostore (location);
2145 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2148 MONO_CHECK_NULL (location, NULL);
2149 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2150 mono_gc_wbarrier_generic_nostore (location);
2155 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2157 return InterlockedAdd (location, value);
2161 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2163 #if SIZEOF_VOID_P == 4
2164 if (G_UNLIKELY ((size_t)location & 0x7)) {
2166 mono_interlocked_lock ();
2169 mono_interlocked_unlock ();
2173 return InterlockedAdd64 (location, value);
2177 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2179 #if SIZEOF_VOID_P == 4
2180 if (G_UNLIKELY ((size_t)location & 0x7)) {
2182 mono_interlocked_lock ();
2184 mono_interlocked_unlock ();
2188 return InterlockedRead64 (location);
2192 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2194 mono_memory_barrier ();
2198 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2200 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2202 if (state & ThreadState_Background) {
2203 /* If the thread changes the background mode, the main thread has to
2204 * be notified, since it has to rebuild the list of threads to
2207 mono_os_event_set (&background_change_event);
2212 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2214 mono_thread_set_state (this_obj, (MonoThreadState)state);
2216 if (state & ThreadState_Background) {
2217 /* If the thread changes the background mode, the main thread has to
2218 * be notified, since it has to rebuild the list of threads to
2221 mono_os_event_set (&background_change_event);
2226 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2230 LOCK_THREAD (this_obj);
2232 state = this_obj->state;
2234 UNLOCK_THREAD (this_obj);
2239 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2241 MonoInternalThread *current;
2243 MonoInternalThread *thread = this_obj->internal_thread;
2245 LOCK_THREAD (thread);
2247 current = mono_thread_internal_current ();
2249 thread->thread_interrupt_requested = TRUE;
2250 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2252 UNLOCK_THREAD (thread);
2255 async_abort_internal (thread, FALSE);
2260 * mono_thread_current_check_pending_interrupt:
2261 * Checks if there's a interruption request and set the pending exception if so.
2262 * \returns true if a pending exception was set
2265 mono_thread_current_check_pending_interrupt (void)
2267 MonoInternalThread *thread = mono_thread_internal_current ();
2268 gboolean throw_ = FALSE;
2270 LOCK_THREAD (thread);
2272 if (thread->thread_interrupt_requested) {
2274 thread->thread_interrupt_requested = FALSE;
2277 UNLOCK_THREAD (thread);
2280 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2285 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2287 LOCK_THREAD (thread);
2289 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2291 UNLOCK_THREAD (thread);
2295 if ((thread->state & ThreadState_Unstarted) != 0) {
2296 thread->state |= ThreadState_Aborted;
2297 UNLOCK_THREAD (thread);
2301 thread->state |= ThreadState_AbortRequested;
2302 if (thread->abort_state_handle)
2303 mono_gchandle_free (thread->abort_state_handle);
2305 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2306 g_assert (thread->abort_state_handle);
2308 thread->abort_state_handle = 0;
2310 thread->abort_exc = NULL;
2312 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));
2314 /* During shutdown, we can't wait for other threads */
2316 /* Make sure the thread is awake */
2317 mono_thread_resume (thread);
2319 UNLOCK_THREAD (thread);
2324 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2326 if (!request_thread_abort (thread, state))
2329 if (thread == mono_thread_internal_current ()) {
2331 self_abort_internal (&error);
2332 mono_error_set_pending_exception (&error);
2334 async_abort_internal (thread, TRUE);
2339 * mono_thread_internal_abort:
2340 * Request thread \p thread to be aborted.
2341 * \p thread MUST NOT be the current thread.
2344 mono_thread_internal_abort (MonoInternalThread *thread)
2346 g_assert (thread != mono_thread_internal_current ());
2348 if (!request_thread_abort (thread, NULL))
2350 async_abort_internal (thread, TRUE);
2354 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2356 MonoInternalThread *thread = mono_thread_internal_current ();
2357 gboolean was_aborting;
2359 LOCK_THREAD (thread);
2360 was_aborting = thread->state & ThreadState_AbortRequested;
2361 thread->state &= ~ThreadState_AbortRequested;
2362 UNLOCK_THREAD (thread);
2364 if (!was_aborting) {
2365 const char *msg = "Unable to reset abort because no abort was requested";
2366 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2370 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2371 thread->abort_exc = NULL;
2372 if (thread->abort_state_handle) {
2373 mono_gchandle_free (thread->abort_state_handle);
2374 /* This is actually not necessary - the handle
2375 only counts if the exception is set */
2376 thread->abort_state_handle = 0;
2381 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2383 LOCK_THREAD (thread);
2385 thread->state &= ~ThreadState_AbortRequested;
2387 if (thread->abort_exc) {
2388 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2389 thread->abort_exc = NULL;
2390 if (thread->abort_state_handle) {
2391 mono_gchandle_free (thread->abort_state_handle);
2392 /* This is actually not necessary - the handle
2393 only counts if the exception is set */
2394 thread->abort_state_handle = 0;
2398 UNLOCK_THREAD (thread);
2402 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2405 MonoInternalThread *thread = this_obj->internal_thread;
2406 MonoObject *state, *deserialized = NULL;
2409 if (!thread->abort_state_handle)
2412 state = mono_gchandle_get_target (thread->abort_state_handle);
2415 domain = mono_domain_get ();
2416 if (mono_object_domain (state) == domain)
2419 deserialized = mono_object_xdomain_representation (state, domain, &error);
2421 if (!deserialized) {
2422 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2423 if (!is_ok (&error)) {
2424 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2425 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2427 mono_set_pending_exception (invalid_op_exc);
2431 return deserialized;
2435 mono_thread_suspend (MonoInternalThread *thread)
2437 LOCK_THREAD (thread);
2439 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2441 UNLOCK_THREAD (thread);
2445 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2447 UNLOCK_THREAD (thread);
2451 thread->state |= ThreadState_SuspendRequested;
2452 mono_os_event_reset (thread->suspended);
2454 if (thread == mono_thread_internal_current ()) {
2455 /* calls UNLOCK_THREAD (thread) */
2456 self_suspend_internal ();
2458 /* calls UNLOCK_THREAD (thread) */
2459 async_suspend_internal (thread, FALSE);
2466 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2468 if (!mono_thread_suspend (this_obj->internal_thread)) {
2469 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2474 /* LOCKING: LOCK_THREAD(thread) must be held */
2476 mono_thread_resume (MonoInternalThread *thread)
2478 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2479 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2480 thread->state &= ~ThreadState_SuspendRequested;
2481 mono_os_event_set (thread->suspended);
2485 if ((thread->state & ThreadState_Suspended) == 0 ||
2486 (thread->state & ThreadState_Unstarted) != 0 ||
2487 (thread->state & ThreadState_Aborted) != 0 ||
2488 (thread->state & ThreadState_Stopped) != 0)
2490 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2494 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2496 mono_os_event_set (thread->suspended);
2498 if (!thread->self_suspended) {
2499 UNLOCK_THREAD (thread);
2501 /* Awake the thread */
2502 if (!mono_thread_info_resume (thread_get_tid (thread)))
2505 LOCK_THREAD (thread);
2508 thread->state &= ~ThreadState_Suspended;
2514 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2516 if (!thread->internal_thread) {
2517 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2519 LOCK_THREAD (thread->internal_thread);
2520 if (!mono_thread_resume (thread->internal_thread))
2521 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2522 UNLOCK_THREAD (thread->internal_thread);
2527 mono_threads_is_critical_method (MonoMethod *method)
2529 switch (method->wrapper_type) {
2530 case MONO_WRAPPER_RUNTIME_INVOKE:
2531 case MONO_WRAPPER_XDOMAIN_INVOKE:
2532 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2539 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2544 if (mono_threads_is_critical_method (m)) {
2545 *((gboolean*)data) = TRUE;
2552 is_running_protected_wrapper (void)
2554 gboolean found = FALSE;
2555 mono_stack_walk (find_wrapper, &found);
2563 mono_thread_stop (MonoThread *thread)
2565 MonoInternalThread *internal = thread->internal_thread;
2567 if (!request_thread_abort (internal, NULL))
2570 if (internal == mono_thread_internal_current ()) {
2572 self_abort_internal (&error);
2574 This function is part of the embeding API and has no way to return the exception
2575 to be thrown. So what we do is keep the old behavior and raise the exception.
2577 mono_error_raise_exception (&error); /* OK to throw, see note */
2579 async_abort_internal (internal, TRUE);
2584 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2586 gint8 tmp = *(volatile gint8 *)ptr;
2587 mono_memory_barrier ();
2592 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2594 gint16 tmp = *(volatile gint16 *)ptr;
2595 mono_memory_barrier ();
2600 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2602 gint32 tmp = *(volatile gint32 *)ptr;
2603 mono_memory_barrier ();
2608 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2610 gint64 tmp = *(volatile gint64 *)ptr;
2611 mono_memory_barrier ();
2616 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2618 volatile void *tmp = *(volatile void **)ptr;
2619 mono_memory_barrier ();
2620 return (void *) tmp;
2624 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2626 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2627 mono_memory_barrier ();
2628 return (MonoObject *) tmp;
2632 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2634 double tmp = *(volatile double *)ptr;
2635 mono_memory_barrier ();
2640 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2642 float tmp = *(volatile float *)ptr;
2643 mono_memory_barrier ();
2648 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2650 return InterlockedRead8 ((volatile gint8 *)ptr);
2654 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2656 return InterlockedRead16 ((volatile gint16 *)ptr);
2660 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2662 return InterlockedRead ((volatile gint32 *)ptr);
2666 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2668 #if SIZEOF_VOID_P == 4
2669 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2671 mono_interlocked_lock ();
2672 val = *(gint64*)ptr;
2673 mono_interlocked_unlock ();
2677 return InterlockedRead64 ((volatile gint64 *)ptr);
2681 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2683 return InterlockedReadPointer ((volatile gpointer *)ptr);
2687 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2691 #if SIZEOF_VOID_P == 4
2692 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2694 mono_interlocked_lock ();
2695 val = *(double*)ptr;
2696 mono_interlocked_unlock ();
2701 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2707 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2711 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2717 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2719 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2723 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2725 mono_memory_barrier ();
2726 *(volatile gint8 *)ptr = value;
2730 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2732 mono_memory_barrier ();
2733 *(volatile gint16 *)ptr = value;
2737 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2739 mono_memory_barrier ();
2740 *(volatile gint32 *)ptr = value;
2744 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2746 mono_memory_barrier ();
2747 *(volatile gint64 *)ptr = value;
2751 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2753 mono_memory_barrier ();
2754 *(volatile void **)ptr = value;
2758 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2760 mono_memory_barrier ();
2761 mono_gc_wbarrier_generic_store (ptr, value);
2765 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2767 mono_memory_barrier ();
2768 *(volatile double *)ptr = value;
2772 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2774 mono_memory_barrier ();
2775 *(volatile float *)ptr = value;
2779 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2781 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2785 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2787 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2791 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2793 InterlockedWrite ((volatile gint32 *)ptr, value);
2797 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2799 #if SIZEOF_VOID_P == 4
2800 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2801 mono_interlocked_lock ();
2802 *(gint64*)ptr = value;
2803 mono_interlocked_unlock ();
2808 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2812 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2814 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2818 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2822 #if SIZEOF_VOID_P == 4
2823 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2824 mono_interlocked_lock ();
2825 *(double*)ptr = value;
2826 mono_interlocked_unlock ();
2833 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2837 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2843 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2847 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2849 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2853 free_context (void *user_data)
2855 ContextStaticData *data = user_data;
2857 mono_threads_lock ();
2860 * There is no guarantee that, by the point this reference queue callback
2861 * has been invoked, the GC handle associated with the object will fail to
2862 * resolve as one might expect. So if we don't free and remove the GC
2863 * handle here, free_context_static_data_helper () could end up resolving
2864 * a GC handle to an actually-dead context which would contain a pointer
2865 * to an already-freed static data segment, resulting in a crash when
2868 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2870 mono_threads_unlock ();
2872 mono_gchandle_free (data->gc_handle);
2873 mono_free_static_data (data->static_data);
2878 mono_threads_register_app_context (MonoAppContext *ctx, MonoError *error)
2881 mono_threads_lock ();
2883 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2886 contexts = g_hash_table_new (NULL, NULL);
2889 context_queue = mono_gc_reference_queue_new (free_context);
2891 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2892 g_hash_table_insert (contexts, gch, gch);
2895 * We use this intermediate structure to contain a duplicate pointer to
2896 * the static data because we can't rely on being able to resolve the GC
2897 * handle in the reference queue callback.
2899 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2900 data->gc_handle = GPOINTER_TO_UINT (gch);
2903 context_adjust_static_data (ctx);
2904 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2906 mono_threads_unlock ();
2908 MONO_PROFILER_RAISE (context_loaded, (ctx));
2912 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContextHandle ctx, MonoError *error)
2915 mono_threads_register_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_register_app_context */
2919 mono_threads_release_app_context (MonoAppContext* ctx, MonoError *error)
2922 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2923 * cleanup in exceptional circumstances, we don't actually do any
2924 * cleanup work here. We instead do this via a reference queue.
2927 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2929 MONO_PROFILER_RAISE (context_unloaded, (ctx));
2933 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContextHandle ctx, MonoError *error)
2936 mono_threads_release_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_release_app_context */
2939 void mono_thread_init (MonoThreadStartCB start_cb,
2940 MonoThreadAttachCB attach_cb)
2942 mono_coop_mutex_init_recursive (&threads_mutex);
2944 mono_os_mutex_init_recursive(&interlocked_mutex);
2945 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2947 mono_os_event_init (&background_change_event, FALSE);
2949 mono_init_static_data_info (&thread_static_info);
2950 mono_init_static_data_info (&context_static_info);
2952 mono_thread_start_cb = start_cb;
2953 mono_thread_attach_cb = attach_cb;
2957 thread_attach (MonoThreadInfo *info)
2959 return mono_gc_thread_attach (info);
2963 thread_detach (MonoThreadInfo *info)
2965 MonoInternalThread *internal;
2968 /* If a delegate is passed to native code and invoked on a thread we dont
2969 * know about, marshal will register it with mono_threads_attach_coop, but
2970 * we have no way of knowing when that thread goes away. SGen has a TSD
2971 * so we assume that if the domain is still registered, we can detach
2976 if (!mono_thread_info_try_get_internal_thread_gchandle (info, &gchandle))
2979 internal = (MonoInternalThread*) mono_gchandle_get_target (gchandle);
2980 g_assert (internal);
2982 mono_gchandle_free (gchandle);
2984 mono_thread_detach_internal (internal);
2988 thread_detach_with_lock (MonoThreadInfo *info)
2990 return mono_gc_thread_detach_with_lock (info);
2994 thread_in_critical_region (MonoThreadInfo *info)
2996 return mono_gc_thread_in_critical_region (info);
3000 ip_in_critical_region (MonoDomain *domain, gpointer ip)
3006 * We pass false for 'try_aot' so this becomes async safe.
3007 * It won't find aot methods whose jit info is not yet loaded,
3008 * so we preload their jit info in the JIT.
3010 ji = mono_jit_info_table_find_internal (domain, ip, FALSE, FALSE);
3014 method = mono_jit_info_get_method (ji);
3017 return mono_gc_is_critical_method (method);
3021 mono_thread_callbacks_init (void)
3023 MonoThreadInfoCallbacks cb;
3025 memset (&cb, 0, sizeof(cb));
3026 cb.thread_attach = thread_attach;
3027 cb.thread_detach = thread_detach;
3028 cb.thread_detach_with_lock = thread_detach_with_lock;
3029 cb.ip_in_critical_region = ip_in_critical_region;
3030 cb.thread_in_critical_region = thread_in_critical_region;
3031 mono_thread_info_callbacks_init (&cb);
3035 * mono_thread_cleanup:
3038 mono_thread_cleanup (void)
3040 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3041 /* The main thread must abandon any held mutexes (particularly
3042 * important for named mutexes as they are shared across
3043 * processes, see bug 74680.) This will happen when the
3044 * thread exits, but if it's not running in a subthread it
3045 * won't exit in time.
3047 mono_w32mutex_abandon ();
3051 /* This stuff needs more testing, it seems one of these
3052 * critical sections can be locked when mono_thread_cleanup is
3055 mono_coop_mutex_destroy (&threads_mutex);
3056 mono_os_mutex_destroy (&interlocked_mutex);
3057 mono_os_mutex_destroy (&delayed_free_table_mutex);
3058 mono_os_mutex_destroy (&small_id_mutex);
3059 mono_os_event_destroy (&background_change_event);
3064 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3066 mono_thread_cleanup_fn = func;
3070 * mono_thread_set_manage_callback:
3073 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3075 thread->internal_thread->manage_callback = func;
3079 static void print_tids (gpointer key, gpointer value, gpointer user)
3081 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3082 * sizeof(uint) and a cast to uint would overflow
3084 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3085 * print this as a pointer.
3087 g_message ("Waiting for: %p", key);
3092 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3093 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3098 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3101 MonoThreadInfoWaitRet ret;
3103 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3105 /* Add the thread state change event, so it wakes
3106 * up if a thread changes to background mode. */
3109 if (check_state_change)
3110 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3112 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3115 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3116 /* See the comment in build_wait_tids() */
3117 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3121 for( i = 0; i < wait->num; i++)
3122 mono_threads_close_thread_handle (wait->handles [i]);
3124 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3127 if (ret < wait->num) {
3128 MonoInternalThread *internal;
3130 internal = wait->threads [ret];
3132 mono_threads_lock ();
3133 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3134 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3135 mono_threads_unlock ();
3139 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3141 struct wait_data *wait=(struct wait_data *)user;
3143 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3144 MonoInternalThread *thread=(MonoInternalThread *)value;
3146 /* Ignore background threads, we abort them later */
3147 /* Do not lock here since it is not needed and the caller holds threads_lock */
3148 if (thread->state & ThreadState_Background) {
3149 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3150 return; /* just leave, ignore */
3153 if (mono_gc_is_finalizer_internal_thread (thread)) {
3154 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3158 if (thread == mono_thread_internal_current ()) {
3159 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3163 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3164 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3168 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3169 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3173 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3174 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3175 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3176 wait->threads[wait->num]=thread;
3179 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3181 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3186 /* Just ignore the rest, we can't do anything with
3193 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3195 struct wait_data *wait=(struct wait_data *)user;
3196 MonoNativeThreadId self = mono_native_thread_id_get ();
3197 MonoInternalThread *thread = (MonoInternalThread *)value;
3199 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3202 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3204 if (mono_gc_is_finalizer_internal_thread (thread))
3207 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3208 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3209 wait->threads[wait->num] = thread;
3212 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3213 mono_thread_internal_abort (thread);
3220 * mono_threads_set_shutting_down:
3222 * Is called by a thread that wants to shut down Mono. If the runtime is already
3223 * shutting down, the calling thread is suspended/stopped, and this function never
3227 mono_threads_set_shutting_down (void)
3229 MonoInternalThread *current_thread = mono_thread_internal_current ();
3231 mono_threads_lock ();
3233 if (shutting_down) {
3234 mono_threads_unlock ();
3236 /* Make sure we're properly suspended/stopped */
3238 LOCK_THREAD (current_thread);
3240 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3241 UNLOCK_THREAD (current_thread);
3242 mono_thread_execute_interruption ();
3244 UNLOCK_THREAD (current_thread);
3247 /*since we're killing the thread, detach it.*/
3248 mono_thread_detach_internal (current_thread);
3250 /* Wake up other threads potentially waiting for us */
3251 mono_thread_info_exit (0);
3253 shutting_down = TRUE;
3255 /* Not really a background state change, but this will
3256 * interrupt the main thread if it is waiting for all
3257 * the other threads.
3259 mono_os_event_set (&background_change_event);
3261 mono_threads_unlock ();
3266 * mono_thread_manage:
3269 mono_thread_manage (void)
3271 struct wait_data wait_data;
3272 struct wait_data *wait = &wait_data;
3274 memset (wait, 0, sizeof (struct wait_data));
3275 /* join each thread that's still running */
3276 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3278 mono_threads_lock ();
3280 THREAD_DEBUG (g_message("%s: No threads", __func__));
3281 mono_threads_unlock ();
3284 mono_threads_unlock ();
3287 mono_threads_lock ();
3288 if (shutting_down) {
3289 /* somebody else is shutting down */
3290 mono_threads_unlock ();
3293 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3294 mono_g_hash_table_foreach (threads, print_tids, NULL));
3296 mono_os_event_reset (&background_change_event);
3298 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3299 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3300 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3301 mono_threads_unlock ();
3303 /* Something to wait for */
3304 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3305 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3306 } while(wait->num>0);
3308 /* Mono is shutting down, so just wait for the end */
3309 if (!mono_runtime_try_shutdown ()) {
3310 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3311 mono_thread_suspend (mono_thread_internal_current ());
3312 mono_thread_execute_interruption ();
3316 * Remove everything but the finalizer thread and self.
3317 * Also abort all the background threads
3320 mono_threads_lock ();
3323 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3324 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3325 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3327 mono_threads_unlock ();
3329 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3330 if (wait->num > 0) {
3331 /* Something to wait for */
3332 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3334 } while (wait->num > 0);
3337 * give the subthreads a chance to really quit (this is mainly needed
3338 * to get correct user and system times from getrusage/wait/time(1)).
3339 * This could be removed if we avoid pthread_detach() and use pthread_join().
3341 mono_thread_info_yield ();
3345 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3347 MonoInternalThread *thread = (MonoInternalThread*)value;
3348 struct wait_data *wait = (struct wait_data*)user_data;
3351 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3353 * This needs no locking.
3355 if ((thread->state & ThreadState_Suspended) != 0 ||
3356 (thread->state & ThreadState_Stopped) != 0)
3359 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3360 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3361 wait->threads [wait->num] = thread;
3367 * mono_thread_suspend_all_other_threads:
3369 * Suspend all managed threads except the finalizer thread and this thread. It is
3370 * not possible to resume them later.
3372 void mono_thread_suspend_all_other_threads (void)
3374 struct wait_data wait_data;
3375 struct wait_data *wait = &wait_data;
3377 MonoNativeThreadId self = mono_native_thread_id_get ();
3378 guint32 eventidx = 0;
3379 gboolean starting, finished;
3381 memset (wait, 0, sizeof (struct wait_data));
3383 * The other threads could be in an arbitrary state at this point, i.e.
3384 * they could be starting up, shutting down etc. This means that there could be
3385 * threads which are not even in the threads hash table yet.
3389 * First we set a barrier which will be checked by all threads before they
3390 * are added to the threads hash table, and they will exit if the flag is set.
3391 * This ensures that no threads could be added to the hash later.
3392 * We will use shutting_down as the barrier for now.
3394 g_assert (shutting_down);
3397 * We make multiple calls to WaitForMultipleObjects since:
3398 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3399 * - some threads could exit without becoming suspended
3404 * Make a copy of the hashtable since we can't do anything with
3405 * threads while threads_mutex is held.
3408 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3409 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3410 mono_threads_lock ();
3411 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3412 mono_threads_unlock ();
3415 /* Get the suspended events that we'll be waiting for */
3416 for (i = 0; i < wait->num; ++i) {
3417 MonoInternalThread *thread = wait->threads [i];
3419 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3420 || mono_gc_is_finalizer_internal_thread (thread)
3421 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3423 mono_threads_close_thread_handle (wait->handles [i]);
3424 wait->threads [i] = NULL;
3428 LOCK_THREAD (thread);
3430 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3431 UNLOCK_THREAD (thread);
3432 mono_threads_close_thread_handle (wait->handles [i]);
3433 wait->threads [i] = NULL;
3439 /* Convert abort requests into suspend requests */
3440 if ((thread->state & ThreadState_AbortRequested) != 0)
3441 thread->state &= ~ThreadState_AbortRequested;
3443 thread->state |= ThreadState_SuspendRequested;
3444 mono_os_event_reset (thread->suspended);
3446 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3447 async_suspend_internal (thread, TRUE);
3449 mono_threads_close_thread_handle (wait->handles [i]);
3450 wait->threads [i] = NULL;
3452 if (eventidx <= 0) {
3454 * If there are threads which are starting up, we wait until they
3455 * are suspended when they try to register in the threads hash.
3456 * This is guaranteed to finish, since the threads which can create new
3457 * threads get suspended after a while.
3458 * FIXME: The finalizer thread can still create new threads.
3460 mono_threads_lock ();
3461 if (threads_starting_up)
3462 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3465 mono_threads_unlock ();
3467 mono_thread_info_sleep (100, NULL);
3475 MonoInternalThread *thread;
3476 MonoStackFrameInfo *frames;
3477 int nframes, max_frames;
3478 int nthreads, max_threads;
3479 MonoInternalThread **threads;
3480 } ThreadDumpUserData;
3482 static gboolean thread_dump_requested;
3484 /* This needs to be async safe */
3486 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3488 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3490 if (ud->nframes < ud->max_frames) {
3491 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3498 /* This needs to be async safe */
3499 static SuspendThreadResult
3500 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3502 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3503 MonoInternalThread *thread = user_data->thread;
3506 /* This no longer works with remote unwinding */
3507 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3508 mono_thread_internal_describe (thread, text);
3509 g_string_append (text, "\n");
3512 if (thread == mono_thread_internal_current ())
3513 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3515 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3517 return MonoResumeThread;
3521 int nthreads, max_threads;
3522 MonoInternalThread **threads;
3523 } CollectThreadsUserData;
3526 collect_thread (gpointer key, gpointer value, gpointer user)
3528 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3529 MonoInternalThread *thread = (MonoInternalThread *)value;
3531 if (ud->nthreads < ud->max_threads)
3532 ud->threads [ud->nthreads ++] = thread;
3536 * Collect running threads into the THREADS array.
3537 * THREADS should be an array allocated on the stack.
3540 collect_threads (MonoInternalThread **thread_array, int max_threads)
3542 CollectThreadsUserData ud;
3544 memset (&ud, 0, sizeof (ud));
3545 /* This array contains refs, but its on the stack, so its ok */
3546 ud.threads = thread_array;
3547 ud.max_threads = max_threads;
3549 mono_threads_lock ();
3550 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3551 mono_threads_unlock ();
3557 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3559 GString* text = g_string_new (0);
3561 GError *error = NULL;
3564 ud->thread = thread;
3567 /* Collect frames for the thread */
3568 if (thread == mono_thread_internal_current ()) {
3569 get_thread_dump (mono_thread_info_current (), ud);
3571 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3575 * Do all the non async-safe work outside of get_thread_dump.
3578 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3580 g_string_append_printf (text, "\n\"%s\"", name);
3583 else if (thread->threadpool_thread) {
3584 g_string_append (text, "\n\"<threadpool thread>\"");
3586 g_string_append (text, "\n\"<unnamed thread>\"");
3589 for (i = 0; i < ud->nframes; ++i) {
3590 MonoStackFrameInfo *frame = &ud->frames [i];
3591 MonoMethod *method = NULL;
3593 if (frame->type == FRAME_TYPE_MANAGED)
3594 method = mono_jit_info_get_method (frame->ji);
3597 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3598 g_string_append_printf (text, " %s\n", location);
3601 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3605 fprintf (stdout, "%s", text->str);
3607 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3608 OutputDebugStringA(text->str);
3611 g_string_free (text, TRUE);
3616 mono_threads_perform_thread_dump (void)
3618 ThreadDumpUserData ud;
3619 MonoInternalThread *thread_array [128];
3620 int tindex, nthreads;
3622 if (!thread_dump_requested)
3625 printf ("Full thread dump:\n");
3627 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3628 nthreads = collect_threads (thread_array, 128);
3630 memset (&ud, 0, sizeof (ud));
3631 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3632 ud.max_frames = 256;
3634 for (tindex = 0; tindex < nthreads; ++tindex)
3635 dump_thread (thread_array [tindex], &ud);
3639 thread_dump_requested = FALSE;
3642 /* Obtain the thread dump of all threads */
3644 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3647 ThreadDumpUserData ud;
3648 MonoInternalThread *thread_array [128];
3649 MonoDomain *domain = mono_domain_get ();
3650 MonoDebugSourceLocation *location;
3651 int tindex, nthreads;
3655 *out_threads = NULL;
3656 *out_stack_frames = NULL;
3658 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3659 nthreads = collect_threads (thread_array, 128);
3661 memset (&ud, 0, sizeof (ud));
3662 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3663 ud.max_frames = 256;
3665 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3668 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3672 for (tindex = 0; tindex < nthreads; ++tindex) {
3673 MonoInternalThread *thread = thread_array [tindex];
3674 MonoArray *thread_frames;
3680 /* Collect frames for the thread */
3681 if (thread == mono_thread_internal_current ()) {
3682 get_thread_dump (mono_thread_info_current (), &ud);
3684 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3687 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3689 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3692 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3694 for (i = 0; i < ud.nframes; ++i) {
3695 MonoStackFrameInfo *frame = &ud.frames [i];
3696 MonoMethod *method = NULL;
3697 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3701 sf->native_offset = frame->native_offset;
3703 if (frame->type == FRAME_TYPE_MANAGED)
3704 method = mono_jit_info_get_method (frame->ji);
3707 sf->method_address = (gsize) frame->ji->code_start;
3709 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3712 MONO_OBJECT_SETREF (sf, method, rm);
3714 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3716 sf->il_offset = location->il_offset;
3718 if (location && location->source_file) {
3719 MonoString *filename = mono_string_new_checked (domain, location->source_file, error);
3722 MONO_OBJECT_SETREF (sf, filename, filename);
3723 sf->line = location->row;
3724 sf->column = location->column;
3726 mono_debug_free_source_location (location);
3731 mono_array_setref (thread_frames, i, sf);
3737 return is_ok (error);
3741 * mono_threads_request_thread_dump:
3743 * Ask all threads except the current to print their stacktrace to stdout.
3746 mono_threads_request_thread_dump (void)
3748 /*The new thread dump code runs out of the finalizer thread. */
3749 thread_dump_requested = TRUE;
3750 mono_gc_finalize_notify ();
3755 gint allocated; /* +1 so that refs [allocated] == NULL */
3759 typedef struct ref_stack RefStack;
3762 ref_stack_new (gint initial_size)
3766 initial_size = MAX (initial_size, 16) + 1;
3767 rs = g_new0 (RefStack, 1);
3768 rs->refs = g_new0 (gpointer, initial_size);
3769 rs->allocated = initial_size;
3774 ref_stack_destroy (gpointer ptr)
3776 RefStack *rs = (RefStack *)ptr;
3785 ref_stack_push (RefStack *rs, gpointer ptr)
3787 g_assert (rs != NULL);
3789 if (rs->bottom >= rs->allocated) {
3790 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3791 rs->allocated <<= 1;
3792 rs->refs [rs->allocated] = NULL;
3794 rs->refs [rs->bottom++] = ptr;
3798 ref_stack_pop (RefStack *rs)
3800 if (rs == NULL || rs->bottom == 0)
3804 rs->refs [rs->bottom] = NULL;
3808 ref_stack_find (RefStack *rs, gpointer ptr)
3815 for (refs = rs->refs; refs && *refs; refs++) {
3823 * mono_thread_push_appdomain_ref:
3825 * Register that the current thread may have references to objects in domain
3826 * @domain on its stack. Each call to this function should be paired with a
3827 * call to pop_appdomain_ref.
3830 mono_thread_push_appdomain_ref (MonoDomain *domain)
3832 MonoInternalThread *thread = mono_thread_internal_current ();
3835 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3836 SPIN_LOCK (thread->lock_thread_id);
3837 if (thread->appdomain_refs == NULL)
3838 thread->appdomain_refs = ref_stack_new (16);
3839 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3840 SPIN_UNLOCK (thread->lock_thread_id);
3845 mono_thread_pop_appdomain_ref (void)
3847 MonoInternalThread *thread = mono_thread_internal_current ();
3850 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3851 SPIN_LOCK (thread->lock_thread_id);
3852 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3853 SPIN_UNLOCK (thread->lock_thread_id);
3858 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3861 SPIN_LOCK (thread->lock_thread_id);
3862 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3863 SPIN_UNLOCK (thread->lock_thread_id);
3868 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3870 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3873 typedef struct abort_appdomain_data {
3874 struct wait_data wait;
3876 } abort_appdomain_data;
3879 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3881 MonoInternalThread *thread = (MonoInternalThread*)value;
3882 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3883 MonoDomain *domain = data->domain;
3885 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3886 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3888 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3889 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3890 data->wait.threads [data->wait.num] = thread;
3893 /* Just ignore the rest, we can't do anything with
3901 * mono_threads_abort_appdomain_threads:
3903 * Abort threads which has references to the given appdomain.
3906 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3908 abort_appdomain_data user_data;
3910 int orig_timeout = timeout;
3913 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3915 start_time = mono_msec_ticks ();
3917 mono_threads_lock ();
3919 user_data.domain = domain;
3920 user_data.wait.num = 0;
3921 /* This shouldn't take any locks */
3922 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3923 mono_threads_unlock ();
3925 if (user_data.wait.num > 0) {
3926 /* Abort the threads outside the threads lock */
3927 for (i = 0; i < user_data.wait.num; ++i)
3928 mono_thread_internal_abort (user_data.wait.threads [i]);
3931 * We should wait for the threads either to abort, or to leave the
3932 * domain. We can't do the latter, so we wait with a timeout.
3934 wait_for_tids (&user_data.wait, 100, FALSE);
3937 /* Update remaining time */
3938 timeout -= mono_msec_ticks () - start_time;
3939 start_time = mono_msec_ticks ();
3941 if (orig_timeout != -1 && timeout < 0)
3944 while (user_data.wait.num > 0);
3946 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3952 mono_thread_self_abort (void)
3955 self_abort_internal (&error);
3956 mono_error_set_pending_exception (&error);
3960 * mono_thread_get_undeniable_exception:
3962 * Return an exception which needs to be raised when leaving a catch clause.
3963 * This is used for undeniable exception propagation.
3966 mono_thread_get_undeniable_exception (void)
3968 MonoInternalThread *thread = mono_thread_internal_current ();
3970 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3973 // We don't want to have our exception effect calls made by
3974 // the catching block
3976 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3980 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3981 * exception if the thread no longer references a dying appdomain.
3983 thread->abort_exc->trace_ips = NULL;
3984 thread->abort_exc->stack_trace = NULL;
3985 return thread->abort_exc;
3988 #if MONO_SMALL_CONFIG
3989 #define NUM_STATIC_DATA_IDX 4
3990 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3994 #define NUM_STATIC_DATA_IDX 8
3995 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
3996 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
4000 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
4001 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
4004 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
4006 gpointer *static_data = (gpointer *)addr;
4008 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
4009 void **ptr = (void **)static_data [i];
4014 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4015 void **p = ptr + idx;
4018 mark_func ((MonoObject**)p, gc_data);
4024 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4026 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4030 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4032 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4036 * mono_alloc_static_data
4038 * Allocate memory blocks for storing threads or context static data
4041 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4043 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4046 gpointer* static_data = *static_data_ptr;
4048 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4049 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4051 if (mono_gc_user_markers_supported ()) {
4052 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4053 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4055 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4056 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4059 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4060 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4061 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4062 *static_data_ptr = static_data;
4063 static_data [0] = static_data;
4066 for (i = 1; i <= idx; ++i) {
4067 if (static_data [i])
4070 if (mono_gc_user_markers_supported ())
4071 static_data [i] = g_malloc0 (static_data_size [i]);
4073 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4074 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4075 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4080 mono_free_static_data (gpointer* static_data)
4083 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4084 gpointer p = static_data [i];
4088 * At this point, the static data pointer array is still registered with the
4089 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4090 * data. Freeing the individual arrays without first nulling their slots
4091 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4092 * such an already freed array. See bug #13813.
4094 static_data [i] = NULL;
4095 mono_memory_write_barrier ();
4096 if (mono_gc_user_markers_supported ())
4099 mono_gc_free_fixed (p);
4101 mono_gc_free_fixed (static_data);
4105 * mono_init_static_data_info
4107 * Initializes static data counters
4109 static void mono_init_static_data_info (StaticDataInfo *static_data)
4111 static_data->idx = 0;
4112 static_data->offset = 0;
4113 static_data->freelist = NULL;
4117 * mono_alloc_static_data_slot
4119 * Generates an offset for static data. static_data contains the counters
4120 * used to generate it.
4123 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4125 if (!static_data->idx && !static_data->offset) {
4127 * we use the first chunk of the first allocation also as
4128 * an array for the rest of the data
4130 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4132 static_data->offset += align - 1;
4133 static_data->offset &= ~(align - 1);
4134 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4135 static_data->idx ++;
4136 g_assert (size <= static_data_size [static_data->idx]);
4137 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4138 static_data->offset = 0;
4140 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4141 static_data->offset += size;
4146 * LOCKING: requires that threads_mutex is held
4149 context_adjust_static_data (MonoAppContext *ctx)
4151 if (context_static_info.offset || context_static_info.idx > 0) {
4152 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4153 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4154 ctx->data->static_data = ctx->static_data;
4159 * LOCKING: requires that threads_mutex is held
4162 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4164 MonoInternalThread *thread = (MonoInternalThread *)value;
4165 guint32 offset = GPOINTER_TO_UINT (user);
4167 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4171 * LOCKING: requires that threads_mutex is held
4174 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4176 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4181 guint32 offset = GPOINTER_TO_UINT (user);
4182 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4183 ctx->data->static_data = ctx->static_data;
4186 static StaticDataFreeList*
4187 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4189 StaticDataFreeList* prev = NULL;
4190 StaticDataFreeList* tmp = static_data->freelist;
4192 if (tmp->size == size) {
4194 prev->next = tmp->next;
4196 static_data->freelist = tmp->next;
4205 #if SIZEOF_VOID_P == 4
4212 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4214 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4216 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4217 MonoBitSet *rb = sets [idx];
4218 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4219 offset /= sizeof (uintptr_t);
4220 /* offset is now the bitmap offset */
4221 for (int i = 0; i < numbits; ++i) {
4222 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4223 mono_bitset_set_fast (rb, offset + i);
4228 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4230 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4231 MonoBitSet *rb = sets [idx];
4232 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4233 offset /= sizeof (uintptr_t);
4234 /* offset is now the bitmap offset */
4235 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4236 mono_bitset_clear_fast (rb, offset + i);
4240 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4242 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4244 StaticDataInfo *info;
4247 if (static_type == SPECIAL_STATIC_THREAD) {
4248 info = &thread_static_info;
4249 sets = thread_reference_bitmaps;
4251 info = &context_static_info;
4252 sets = context_reference_bitmaps;
4255 mono_threads_lock ();
4257 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4261 offset = item->offset;
4264 offset = mono_alloc_static_data_slot (info, size, align);
4267 update_reference_bitmap (sets, offset, bitmap, numbits);
4269 if (static_type == SPECIAL_STATIC_THREAD) {
4270 /* This can be called during startup */
4271 if (threads != NULL)
4272 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4274 if (contexts != NULL)
4275 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4277 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4280 mono_threads_unlock ();
4286 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4288 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4290 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4291 return get_thread_static_data (thread, offset);
4293 return get_context_static_data (thread->current_appcontext, offset);
4298 mono_get_special_static_data (guint32 offset)
4300 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4309 * LOCKING: requires that threads_mutex is held
4312 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4314 MonoInternalThread *thread = (MonoInternalThread *)value;
4315 OffsetSize *data = (OffsetSize *)user;
4316 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4317 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4320 if (!thread->static_data || !thread->static_data [idx])
4322 ptr = ((char*) thread->static_data [idx]) + off;
4323 mono_gc_bzero_atomic (ptr, data->size);
4327 * LOCKING: requires that threads_mutex is held
4330 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4332 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4337 OffsetSize *data = (OffsetSize *)user;
4338 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4339 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4342 if (!ctx->static_data || !ctx->static_data [idx])
4345 ptr = ((char*) ctx->static_data [idx]) + off;
4346 mono_gc_bzero_atomic (ptr, data->size);
4350 do_free_special_slot (guint32 offset, guint32 size)
4352 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4354 StaticDataInfo *info;
4356 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4357 info = &thread_static_info;
4358 sets = thread_reference_bitmaps;
4360 info = &context_static_info;
4361 sets = context_reference_bitmaps;
4364 guint32 data_offset = offset;
4365 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4366 OffsetSize data = { data_offset, size };
4368 clear_reference_bitmap (sets, data.offset, data.size);
4370 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4371 if (threads != NULL)
4372 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4374 if (contexts != NULL)
4375 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4378 if (!mono_runtime_is_shutting_down ()) {
4379 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4381 item->offset = offset;
4384 item->next = info->freelist;
4385 info->freelist = item;
4390 do_free_special (gpointer key, gpointer value, gpointer data)
4392 MonoClassField *field = (MonoClassField *)key;
4393 guint32 offset = GPOINTER_TO_UINT (value);
4396 size = mono_type_size (field->type, &align);
4397 do_free_special_slot (offset, size);
4401 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4403 mono_threads_lock ();
4405 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4407 mono_threads_unlock ();
4411 static void CALLBACK dummy_apc (ULONG_PTR param)
4417 * mono_thread_execute_interruption
4419 * Performs the operation that the requested thread state requires (abort,
4422 static MonoException*
4423 mono_thread_execute_interruption (void)
4425 MonoInternalThread *thread = mono_thread_internal_current ();
4426 MonoThread *sys_thread = mono_thread_current ();
4428 LOCK_THREAD (thread);
4430 /* MonoThread::interruption_requested can only be changed with atomics */
4431 if (!mono_thread_clear_interruption_requested (thread)) {
4432 UNLOCK_THREAD (thread);
4436 /* this will consume pending APC calls */
4438 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4440 /* Clear the interrupted flag of the thread so it can wait again */
4441 mono_thread_info_clear_self_interrupt ();
4443 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4444 if (sys_thread->pending_exception) {
4447 exc = sys_thread->pending_exception;
4448 sys_thread->pending_exception = NULL;
4450 UNLOCK_THREAD (thread);
4452 } else if (thread->state & (ThreadState_AbortRequested)) {
4453 UNLOCK_THREAD (thread);
4454 g_assert (sys_thread->pending_exception == NULL);
4455 if (thread->abort_exc == NULL) {
4457 * This might be racy, but it has to be called outside the lock
4458 * since it calls managed code.
4460 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4462 return thread->abort_exc;
4463 } else if (thread->state & (ThreadState_SuspendRequested)) {
4464 /* calls UNLOCK_THREAD (thread) */
4465 self_suspend_internal ();
4467 } else if (thread->thread_interrupt_requested) {
4469 thread->thread_interrupt_requested = FALSE;
4470 UNLOCK_THREAD (thread);
4472 return(mono_get_exception_thread_interrupted ());
4475 UNLOCK_THREAD (thread);
4481 * mono_thread_request_interruption
4483 * A signal handler can call this method to request the interruption of a
4484 * thread. The result of the interruption will depend on the current state of
4485 * the thread. If the result is an exception that needs to be throw, it is
4486 * provided as return value.
4489 mono_thread_request_interruption (gboolean running_managed)
4491 MonoInternalThread *thread = mono_thread_internal_current ();
4493 /* The thread may already be stopping */
4497 if (!mono_thread_set_interruption_requested (thread))
4500 if (!running_managed || is_running_protected_wrapper ()) {
4501 /* Can't stop while in unmanaged code. Increase the global interruption
4502 request count. When exiting the unmanaged method the count will be
4503 checked and the thread will be interrupted. */
4505 /* this will awake the thread if it is in WaitForSingleObject
4507 /* Our implementation of this function ignores the func argument */
4509 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4511 mono_thread_info_self_interrupt ();
4516 return mono_thread_execute_interruption ();
4520 /*This function should be called by a thread after it has exited all of
4521 * its handle blocks at interruption time.*/
4523 mono_thread_resume_interruption (gboolean exec)
4525 MonoInternalThread *thread = mono_thread_internal_current ();
4526 gboolean still_aborting;
4528 /* The thread may already be stopping */
4532 LOCK_THREAD (thread);
4533 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4534 UNLOCK_THREAD (thread);
4536 /*This can happen if the protected block called Thread::ResetAbort*/
4537 if (!still_aborting)
4540 if (!mono_thread_set_interruption_requested (thread))
4543 mono_thread_info_self_interrupt ();
4546 return mono_thread_execute_interruption ();
4551 gboolean mono_thread_interruption_requested ()
4553 if (thread_interruption_requested) {
4554 MonoInternalThread *thread = mono_thread_internal_current ();
4555 /* The thread may already be stopping */
4557 return mono_thread_get_interruption_requested (thread);
4562 static MonoException*
4563 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4565 MonoInternalThread *thread = mono_thread_internal_current ();
4567 /* The thread may already be stopping */
4570 if (!mono_thread_get_interruption_requested (thread))
4572 if (!bypass_abort_protection && is_running_protected_wrapper ())
4575 return mono_thread_execute_interruption ();
4579 * Performs the interruption of the current thread, if one has been requested,
4580 * and the thread is not running a protected wrapper.
4581 * Return the exception which needs to be thrown, if any.
4584 mono_thread_interruption_checkpoint (void)
4586 return mono_thread_interruption_checkpoint_request (FALSE);
4590 * Performs the interruption of the current thread, if one has been requested.
4591 * Return the exception which needs to be thrown, if any.
4594 mono_thread_force_interruption_checkpoint_noraise (void)
4596 return mono_thread_interruption_checkpoint_request (TRUE);
4600 * mono_set_pending_exception:
4602 * Set the pending exception of the current thread to EXC.
4603 * The exception will be thrown when execution returns to managed code.
4606 mono_set_pending_exception (MonoException *exc)
4608 MonoThread *thread = mono_thread_current ();
4610 /* The thread may already be stopping */
4614 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4616 mono_thread_request_interruption (FALSE);
4620 * mono_thread_interruption_request_flag:
4622 * Returns the address of a flag that will be non-zero if an interruption has
4623 * been requested for a thread. The thread to interrupt may not be the current
4624 * thread, so an additional call to mono_thread_interruption_requested() or
4625 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4628 gint32* mono_thread_interruption_request_flag ()
4630 return &thread_interruption_requested;
4634 mono_thread_init_apartment_state (void)
4637 MonoInternalThread* thread = mono_thread_internal_current ();
4639 /* Positive return value indicates success, either
4640 * S_OK if this is first CoInitialize call, or
4641 * S_FALSE if CoInitialize already called, but with same
4642 * threading model. A negative value indicates failure,
4643 * probably due to trying to change the threading model.
4645 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4646 ? COINIT_APARTMENTTHREADED
4647 : COINIT_MULTITHREADED) < 0) {
4648 thread->apartment_state = ThreadApartmentState_Unknown;
4654 mono_thread_cleanup_apartment_state (void)
4657 MonoInternalThread* thread = mono_thread_internal_current ();
4659 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4666 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4668 LOCK_THREAD (thread);
4669 thread->state |= state;
4670 UNLOCK_THREAD (thread);
4674 * mono_thread_test_and_set_state:
4675 * Test if current state of \p thread include \p test. If it does not, OR \p set into the state.
4676 * \returns TRUE if \p set was OR'd in.
4679 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4681 LOCK_THREAD (thread);
4683 if ((thread->state & test) != 0) {
4684 UNLOCK_THREAD (thread);
4688 thread->state |= set;
4689 UNLOCK_THREAD (thread);
4695 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4697 LOCK_THREAD (thread);
4698 thread->state &= ~state;
4699 UNLOCK_THREAD (thread);
4703 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4705 gboolean ret = FALSE;
4707 LOCK_THREAD (thread);
4709 if ((thread->state & test) != 0) {
4713 UNLOCK_THREAD (thread);
4719 self_interrupt_thread (void *_unused)
4722 MonoThreadInfo *info;
4724 exc = mono_thread_execute_interruption ();
4726 if (mono_threads_is_coop_enabled ()) {
4727 /* We can return from an async call in coop, as
4728 * it's simply called when exiting the safepoint */
4732 g_error ("%s: we can't resume from an async call", __func__);
4735 info = mono_thread_info_current ();
4737 /* We must use _with_context since we didn't trampoline into the runtime */
4738 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. */
4742 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4746 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4750 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4752 MonoJitInfo **dest = (MonoJitInfo **)data;
4758 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4760 MonoJitInfo *ji = NULL;
4765 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4766 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4767 * where we hold runtime locks.
4769 if (!mono_threads_is_coop_enabled ())
4770 mono_thread_info_set_is_async_context (TRUE);
4771 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4772 if (!mono_threads_is_coop_enabled ())
4773 mono_thread_info_set_is_async_context (FALSE);
4778 MonoInternalThread *thread;
4779 gboolean install_async_abort;
4780 MonoThreadInfoInterruptToken *interrupt_token;
4783 static SuspendThreadResult
4784 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4786 AbortThreadData *data = (AbortThreadData *)ud;
4787 MonoInternalThread *thread = data->thread;
4788 MonoJitInfo *ji = NULL;
4789 gboolean protected_wrapper;
4790 gboolean running_managed;
4792 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4793 return MonoResumeThread;
4795 /*someone is already interrupting it*/
4796 if (!mono_thread_set_interruption_requested (thread))
4797 return MonoResumeThread;
4799 ji = mono_thread_info_get_last_managed (info);
4800 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4801 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4803 if (!protected_wrapper && running_managed) {
4804 /*We are in managed code*/
4805 /*Set the thread to call */
4806 if (data->install_async_abort)
4807 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4808 return MonoResumeThread;
4811 * This will cause waits to be broken.
4812 * It will also prevent the thread from entering a wait, so if the thread returns
4813 * from the wait before it receives the abort signal, it will just spin in the wait
4814 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4817 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4819 return MonoResumeThread;
4824 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4826 AbortThreadData data;
4828 g_assert (thread != mono_thread_internal_current ());
4830 data.thread = thread;
4831 data.install_async_abort = install_async_abort;
4832 data.interrupt_token = NULL;
4834 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4835 if (data.interrupt_token)
4836 mono_thread_info_finish_interrupt (data.interrupt_token);
4837 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4841 self_abort_internal (MonoError *error)
4847 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4848 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4851 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.
4853 exc = mono_thread_request_interruption (TRUE);
4855 mono_error_set_exception_instance (error, exc);
4857 mono_thread_info_self_interrupt ();
4861 MonoInternalThread *thread;
4863 MonoThreadInfoInterruptToken *interrupt_token;
4864 } SuspendThreadData;
4866 static SuspendThreadResult
4867 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4869 SuspendThreadData *data = (SuspendThreadData *)ud;
4870 MonoInternalThread *thread = data->thread;
4871 MonoJitInfo *ji = NULL;
4872 gboolean protected_wrapper;
4873 gboolean running_managed;
4875 ji = mono_thread_info_get_last_managed (info);
4876 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4877 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4879 if (running_managed && !protected_wrapper) {
4880 if (mono_threads_is_coop_enabled ()) {
4881 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4882 return MonoResumeThread;
4884 thread->state &= ~ThreadState_SuspendRequested;
4885 thread->state |= ThreadState_Suspended;
4886 return KeepSuspended;
4889 mono_thread_set_interruption_requested (thread);
4890 if (data->interrupt)
4891 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4893 return MonoResumeThread;
4897 /* LOCKING: called with @thread synch_cs held, and releases it */
4899 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4901 SuspendThreadData data;
4903 g_assert (thread != mono_thread_internal_current ());
4905 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4907 thread->self_suspended = FALSE;
4909 data.thread = thread;
4910 data.interrupt = interrupt;
4911 data.interrupt_token = NULL;
4913 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4914 if (data.interrupt_token)
4915 mono_thread_info_finish_interrupt (data.interrupt_token);
4917 UNLOCK_THREAD (thread);
4920 /* LOCKING: called with @thread synch_cs held, and releases it */
4922 self_suspend_internal (void)
4924 MonoInternalThread *thread;
4926 MonoOSEventWaitRet res;
4928 thread = mono_thread_internal_current ();
4930 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4932 thread->self_suspended = TRUE;
4934 thread->state &= ~ThreadState_SuspendRequested;
4935 thread->state |= ThreadState_Suspended;
4937 UNLOCK_THREAD (thread);
4939 event = thread->suspended;
4942 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4943 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4948 suspend_for_shutdown_async_call (gpointer unused)
4951 mono_thread_info_yield ();
4954 static SuspendThreadResult
4955 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4957 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4958 return MonoResumeThread;
4962 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4964 g_assert (thread != mono_thread_internal_current ());
4966 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4970 * mono_thread_is_foreign:
4971 * \param thread the thread to query
4973 * This function allows one to determine if a thread was created by the mono runtime and has
4974 * a well defined lifecycle or it's a foreign one, created by the native environment.
4976 * \returns TRUE if \p thread was not created by the runtime.
4979 mono_thread_is_foreign (MonoThread *thread)
4981 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4982 return info->runtime_thread == FALSE;
4986 * mono_add_joinable_thread:
4988 * Add TID to the list of joinable threads.
4989 * LOCKING: Acquires the threads lock.
4992 mono_threads_add_joinable_thread (gpointer tid)
4996 * We cannot detach from threads because it causes problems like
4997 * 2fd16f60/r114307. So we collect them and join them when
4998 * we have time (in he finalizer thread).
5000 joinable_threads_lock ();
5001 if (!joinable_threads)
5002 joinable_threads = g_hash_table_new (NULL, NULL);
5003 g_hash_table_insert (joinable_threads, tid, tid);
5004 UnlockedIncrement (&joinable_thread_count);
5005 joinable_threads_unlock ();
5007 mono_gc_finalize_notify ();
5012 * mono_threads_join_threads:
5014 * Join all joinable threads. This is called from the finalizer thread.
5015 * LOCKING: Acquires the threads lock.
5018 mono_threads_join_threads (void)
5021 GHashTableIter iter;
5028 if (!UnlockedRead (&joinable_thread_count))
5032 joinable_threads_lock ();
5034 if (g_hash_table_size (joinable_threads)) {
5035 g_hash_table_iter_init (&iter, joinable_threads);
5036 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5037 thread = (pthread_t)tid;
5038 g_hash_table_remove (joinable_threads, key);
5039 UnlockedDecrement (&joinable_thread_count);
5042 joinable_threads_unlock ();
5044 if (thread != pthread_self ()) {
5046 /* This shouldn't block */
5047 mono_threads_join_lock ();
5048 mono_native_thread_join (thread);
5049 mono_threads_join_unlock ();
5062 * Wait for thread TID to exit.
5063 * LOCKING: Acquires the threads lock.
5066 mono_thread_join (gpointer tid)
5070 gboolean found = FALSE;
5072 joinable_threads_lock ();
5073 if (!joinable_threads)
5074 joinable_threads = g_hash_table_new (NULL, NULL);
5075 if (g_hash_table_lookup (joinable_threads, tid)) {
5076 g_hash_table_remove (joinable_threads, tid);
5077 UnlockedDecrement (&joinable_thread_count);
5080 joinable_threads_unlock ();
5083 thread = (pthread_t)tid;
5085 mono_native_thread_join (thread);
5091 mono_thread_internal_unhandled_exception (MonoObject* exc)
5093 MonoClass *klass = exc->vtable->klass;
5094 if (is_threadabort_exception (klass)) {
5095 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5096 } else if (!is_appdomainunloaded_exception (klass)
5097 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5098 mono_unhandled_exception (exc);
5099 if (mono_environment_exitcode_get () == 1) {
5100 mono_environment_exitcode_set (255);
5101 mono_invoke_unhandled_exception_hook (exc);
5102 g_assert_not_reached ();
5108 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5111 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5112 mono_error_set_pending_exception (&error);
5116 * mono_threads_attach_coop: called by native->managed wrappers
5119 * - blocking mode: contains gc unsafe transition cookie
5120 * - non-blocking mode: contains random data
5121 * - @return: the original domain which needs to be restored, or NULL.
5124 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5127 MonoThreadInfo *info;
5130 orig = mono_domain_get ();
5133 /* Happens when called from AOTed code which is only used in the root domain. */
5134 domain = mono_get_root_domain ();
5138 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5139 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5140 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5141 * we're only responsible for making the cookie. */
5142 if (mono_threads_is_blocking_transition_enabled ())
5143 external = !(info = mono_thread_info_current_unchecked ()) || !mono_thread_info_is_live (info);
5145 if (!mono_thread_internal_current ()) {
5146 mono_thread_attach_full (domain, FALSE);
5149 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5153 mono_domain_set (domain, TRUE);
5155 if (mono_threads_is_blocking_transition_enabled ()) {
5157 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5158 * return the right cookie. */
5159 *dummy = mono_threads_enter_gc_unsafe_region_cookie ();
5161 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5162 *dummy = mono_threads_enter_gc_unsafe_region (dummy);
5170 * mono_threads_detach_coop: called by native->managed wrappers
5172 * - @cookie: the original domain which needs to be restored, or NULL.
5174 * - blocking mode: contains gc unsafe transition cookie
5175 * - non-blocking mode: contains random data
5178 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5180 MonoDomain *domain, *orig;
5182 orig = (MonoDomain*) cookie;
5184 domain = mono_domain_get ();
5187 if (mono_threads_is_blocking_transition_enabled ()) {
5188 /* it won't do anything if cookie is NULL
5189 * thread state RUNNING -> (RUNNING|BLOCKING) */
5190 mono_threads_exit_gc_unsafe_region (*dummy, dummy);
5193 if (orig != domain) {
5195 mono_domain_unset ();
5197 mono_domain_set (orig, TRUE);
5202 /* Returns TRUE if the current thread is ready to be interrupted. */
5204 mono_threads_is_ready_to_be_interrupted (void)
5206 MonoInternalThread *thread;
5208 thread = mono_thread_internal_current ();
5209 LOCK_THREAD (thread);
5210 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5211 UNLOCK_THREAD (thread);
5215 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5216 UNLOCK_THREAD (thread);
5220 UNLOCK_THREAD (thread);
5226 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5228 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5230 if (internal->thread_info) {
5231 g_string_append (text, ", state : ");
5232 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5235 if (internal->owned_mutexes) {
5238 g_string_append (text, ", owns : [");
5239 for (i = 0; i < internal->owned_mutexes->len; i++)
5240 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5241 g_string_append (text, "]");
5246 mono_thread_internal_is_current (MonoInternalThread *internal)
5248 g_assert (internal);
5249 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));