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);
1030 start_wrapper (gpointer data)
1032 StartInfo *start_info;
1033 MonoThreadInfo *info;
1036 start_info = (StartInfo*) data;
1037 g_assert (start_info);
1039 info = mono_thread_info_attach ();
1040 info->runtime_thread = TRUE;
1042 /* Run the actual main function of the thread */
1043 res = start_wrapper_internal (start_info, info->stack_end);
1045 mono_thread_info_exit (res);
1047 g_assert_not_reached ();
1053 * Common thread creation code.
1054 * LOCKING: Acquires the threads lock.
1057 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
1058 MonoThreadCreateFlags flags, MonoError *error)
1060 StartInfo *start_info = NULL;
1061 MonoNativeThreadId tid;
1063 gsize stack_set_size;
1066 g_assert (!start_func && !start_func_arg);
1068 g_assert (!start_delegate);
1070 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
1071 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
1072 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1074 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
1075 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
1076 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1080 * Join joinable threads to prevent running out of threads since the finalizer
1081 * thread might be blocked/backlogged.
1083 mono_threads_join_threads ();
1087 mono_threads_lock ();
1088 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
1089 mono_threads_unlock ();
1092 if (threads_starting_up == NULL) {
1093 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
1095 mono_g_hash_table_insert (threads_starting_up, thread, thread);
1096 mono_threads_unlock ();
1098 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
1099 if (internal->threadpool_thread)
1100 mono_thread_set_state (internal, ThreadState_Background);
1102 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
1104 start_info = g_new0 (StartInfo, 1);
1105 start_info->ref = 2;
1106 start_info->thread = thread;
1107 start_info->start_delegate = start_delegate;
1108 start_info->start_delegate_arg = thread->start_obj;
1109 start_info->start_func = start_func;
1110 start_info->start_func_arg = start_func_arg;
1111 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
1112 start_info->failed = FALSE;
1113 mono_coop_sem_init (&start_info->registered, 0);
1115 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
1116 stack_set_size = default_stacksize_for_thread (internal);
1120 if (!mono_thread_platform_create_thread (start_wrapper, start_info, &stack_set_size, &tid)) {
1121 /* The thread couldn't be created, so set an exception */
1122 mono_threads_lock ();
1123 mono_g_hash_table_remove (threads_starting_up, thread);
1124 mono_threads_unlock ();
1125 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
1126 /* ref is not going to be decremented in start_wrapper_internal */
1127 InterlockedDecrement (&start_info->ref);
1132 internal->stack_size = (int) stack_set_size;
1134 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
1137 * Wait for the thread to set up its TLS data etc, so
1138 * theres no potential race condition if someone tries
1139 * to look up the data believing the thread has
1143 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
1145 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));
1147 ret = !start_info->failed;
1150 if (InterlockedDecrement (&start_info->ref) == 0) {
1151 mono_coop_sem_destroy (&start_info->registered);
1152 g_free (start_info);
1159 * mono_thread_new_init:
1162 mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1164 if (mono_thread_start_cb) {
1165 mono_thread_start_cb (tid, stack_start, func);
1170 * mono_threads_set_default_stacksize:
1173 mono_threads_set_default_stacksize (guint32 stacksize)
1175 default_stacksize = stacksize;
1179 * mono_threads_get_default_stacksize:
1182 mono_threads_get_default_stacksize (void)
1184 return default_stacksize;
1188 * mono_thread_create_internal:
1190 * ARG should not be a GC reference.
1193 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1196 MonoInternalThread *internal;
1201 internal = create_internal_thread_object ();
1203 thread = create_thread_object (domain, internal);
1205 LOCK_THREAD (internal);
1207 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1209 UNLOCK_THREAD (internal);
1211 return_val_if_nok (error, NULL);
1216 * mono_thread_create:
1219 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1222 if (!mono_thread_create_checked (domain, func, arg, &error))
1223 mono_error_cleanup (&error);
1227 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1229 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1233 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1235 MonoInternalThread *internal;
1237 MonoThreadInfo *info;
1238 MonoNativeThreadId tid;
1240 if (mono_thread_internal_current_is_attached ()) {
1241 if (domain != mono_domain_get ())
1242 mono_domain_set (domain, TRUE);
1243 /* Already attached */
1244 return mono_thread_current ();
1247 info = mono_thread_info_attach ();
1250 tid=mono_native_thread_id_get ();
1252 internal = create_internal_thread_object ();
1254 thread = create_thread_object (domain, internal);
1256 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1257 /* Mono is shutting down, so just wait for the end */
1259 mono_thread_info_sleep (10000, NULL);
1262 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1264 if (mono_thread_attach_cb)
1265 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), info->stack_end);
1267 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1268 if (!mono_thread_info_current ()->tools_thread)
1269 MONO_PROFILER_RAISE (thread_started, (MONO_NATIVE_THREAD_ID_TO_UINT (tid)));
1275 * mono_thread_attach:
1278 mono_thread_attach (MonoDomain *domain)
1280 return mono_thread_attach_full (domain, FALSE);
1284 * mono_thread_detach:
1287 mono_thread_detach (MonoThread *thread)
1290 mono_thread_detach_internal (thread->internal_thread);
1294 * mono_thread_detach_if_exiting:
1296 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1297 * This should be used at the end of embedding code which calls into managed code, and which
1298 * can be called from pthread dtors, like <code>dealloc:</code> implementations in Objective-C.
1301 mono_thread_detach_if_exiting (void)
1303 if (mono_thread_info_is_exiting ()) {
1304 MonoInternalThread *thread;
1306 thread = mono_thread_internal_current ();
1308 mono_thread_detach_internal (thread);
1309 mono_thread_info_detach ();
1317 mono_thread_internal_current_is_attached (void)
1319 MonoInternalThread *internal;
1321 internal = GET_CURRENT_OBJECT ();
1332 mono_thread_exit (void)
1334 MonoInternalThread *thread = mono_thread_internal_current ();
1336 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1338 mono_thread_detach_internal (thread);
1340 /* we could add a callback here for embedders to use. */
1341 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1342 exit (mono_environment_exitcode_get ());
1344 mono_thread_info_exit (0);
1348 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1350 MonoInternalThread *internal;
1352 internal = create_internal_thread_object ();
1354 internal->state = ThreadState_Unstarted;
1356 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1360 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1362 return mono_thread_current ();
1366 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1370 MonoInternalThread *internal;
1373 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1375 if (!this_obj->internal_thread)
1376 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1377 internal = this_obj->internal_thread;
1379 LOCK_THREAD (internal);
1381 if ((internal->state & ThreadState_Unstarted) == 0) {
1382 UNLOCK_THREAD (internal);
1383 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1387 if ((internal->state & ThreadState_Aborted) != 0) {
1388 UNLOCK_THREAD (internal);
1392 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1394 mono_error_cleanup (&error);
1395 UNLOCK_THREAD (internal);
1399 internal->state &= ~ThreadState_Unstarted;
1401 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1403 UNLOCK_THREAD (internal);
1404 return internal->handle;
1408 * This is called from the finalizer of the internal thread object.
1411 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1413 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1416 * Since threads keep a reference to their thread object while running, by
1417 * the time this function is called, the thread has already exited/detached,
1418 * i.e. mono_thread_detach_internal () has ran. The exception is during
1419 * shutdown, when mono_thread_detach_internal () can be called after this.
1421 if (this_obj->handle) {
1422 mono_threads_close_thread_handle (this_obj->handle);
1423 this_obj->handle = NULL;
1427 CloseHandle (this_obj->native_handle);
1430 if (this_obj->synch_cs) {
1431 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1432 this_obj->synch_cs = NULL;
1433 mono_coop_mutex_destroy (synch_cs);
1437 if (this_obj->name) {
1438 void *name = this_obj->name;
1439 this_obj->name = NULL;
1445 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1448 MonoInternalThread *thread = mono_thread_internal_current ();
1450 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1452 if (mono_thread_current_check_pending_interrupt ())
1456 gboolean alerted = FALSE;
1458 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1460 res = mono_thread_info_sleep (ms, &alerted);
1462 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1465 MonoException* exc = mono_thread_execute_interruption ();
1467 mono_raise_exception (exc);
1469 // FIXME: !MONO_INFINITE_WAIT
1470 if (ms != MONO_INFINITE_WAIT)
1479 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1484 ves_icall_System_Threading_Thread_GetDomainID (void)
1486 return mono_domain_get()->domain_id;
1490 ves_icall_System_Threading_Thread_Yield (void)
1492 return mono_thread_info_yield ();
1496 * mono_thread_get_name:
1498 * Return the name of the thread. NAME_LEN is set to the length of the name.
1499 * Return NULL if the thread has no name. The returned memory is owned by the
1503 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1507 LOCK_THREAD (this_obj);
1509 if (!this_obj->name) {
1513 *name_len = this_obj->name_len;
1514 res = g_new (gunichar2, this_obj->name_len);
1515 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1518 UNLOCK_THREAD (this_obj);
1524 * mono_thread_get_name_utf8:
1525 * \returns the name of the thread in UTF-8.
1526 * Return NULL if the thread has no name.
1527 * The returned memory is owned by the caller.
1530 mono_thread_get_name_utf8 (MonoThread *thread)
1535 MonoInternalThread *internal = thread->internal_thread;
1536 if (internal == NULL)
1539 LOCK_THREAD (internal);
1541 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1543 UNLOCK_THREAD (internal);
1549 * mono_thread_get_managed_id:
1550 * \returns the \c Thread.ManagedThreadId value of \p thread.
1551 * Returns \c -1 if \p thread is NULL.
1554 mono_thread_get_managed_id (MonoThread *thread)
1559 MonoInternalThread *internal = thread->internal_thread;
1560 if (internal == NULL)
1563 int32_t id = internal->managed_id;
1569 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1574 error_init (&error);
1576 LOCK_THREAD (this_obj);
1578 if (!this_obj->name)
1581 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1583 UNLOCK_THREAD (this_obj);
1585 if (mono_error_set_pending_exception (&error))
1592 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1594 LOCK_THREAD (this_obj);
1599 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1600 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1601 UNLOCK_THREAD (this_obj);
1603 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1606 if (this_obj->name) {
1607 g_free (this_obj->name);
1608 this_obj->name_len = 0;
1611 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1612 this_obj->name_len = mono_string_length (name);
1615 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1618 this_obj->name = NULL;
1621 UNLOCK_THREAD (this_obj);
1623 if (this_obj->name && this_obj->tid) {
1624 char *tname = mono_string_to_utf8_checked (name, error);
1625 return_if_nok (error);
1626 MONO_PROFILER_RAISE (thread_name, (this_obj->tid, tname));
1627 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1633 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1636 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1637 mono_error_set_pending_exception (&error);
1641 * ves_icall_System_Threading_Thread_GetPriority_internal:
1642 * @param this_obj: The MonoInternalThread on which to operate.
1644 * Gets the priority of the given thread.
1645 * @return: The priority of the given thread.
1648 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1651 MonoInternalThread *internal = this_obj->internal_thread;
1653 LOCK_THREAD (internal);
1654 priority = internal->priority;
1655 UNLOCK_THREAD (internal);
1661 * ves_icall_System_Threading_Thread_SetPriority_internal:
1662 * @param this_obj: The MonoInternalThread on which to operate.
1663 * @param priority: The priority to set.
1665 * Sets the priority of the given thread.
1668 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1670 MonoInternalThread *internal = this_obj->internal_thread;
1672 LOCK_THREAD (internal);
1673 internal->priority = priority;
1674 if (internal->thread_info != NULL)
1675 mono_thread_internal_set_priority (internal, priority);
1676 UNLOCK_THREAD (internal);
1679 /* If the array is already in the requested domain, we just return it,
1680 otherwise we return a copy in that domain. */
1682 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1690 if (mono_object_domain (arr) == domain)
1693 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1694 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1699 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1702 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1703 mono_error_set_pending_exception (&error);
1708 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1711 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1712 mono_error_set_pending_exception (&error);
1717 * mono_thread_current:
1720 mono_thread_current (void)
1722 MonoDomain *domain = mono_domain_get ();
1723 MonoInternalThread *internal = mono_thread_internal_current ();
1724 MonoThread **current_thread_ptr;
1726 g_assert (internal);
1727 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1729 if (!*current_thread_ptr) {
1730 g_assert (domain != mono_get_root_domain ());
1731 *current_thread_ptr = create_thread_object (domain, internal);
1733 return *current_thread_ptr;
1736 /* Return the thread object belonging to INTERNAL in the current domain */
1738 mono_thread_current_for_thread (MonoInternalThread *internal)
1740 MonoDomain *domain = mono_domain_get ();
1741 MonoThread **current_thread_ptr;
1743 g_assert (internal);
1744 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1746 if (!*current_thread_ptr) {
1747 g_assert (domain != mono_get_root_domain ());
1748 *current_thread_ptr = create_thread_object (domain, internal);
1750 return *current_thread_ptr;
1754 mono_thread_internal_current (void)
1756 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1757 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1761 static MonoThreadInfoWaitRet
1762 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1765 MonoThreadInfoWaitRet ret;
1772 start = (ms == -1) ? 0 : mono_msec_ticks ();
1775 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1778 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1781 exc = mono_thread_execute_interruption ();
1783 mono_error_set_exception_instance (error, exc);
1790 /* Re-calculate ms according to the time passed */
1791 diff_ms = (gint32)(mono_msec_ticks () - start);
1792 if (diff_ms >= ms) {
1793 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1796 wait = ms - diff_ms;
1803 ves_icall_System_Threading_Thread_Join_internal (MonoThread *this_obj, int ms)
1805 MonoInternalThread *thread = this_obj->internal_thread;
1806 MonoThreadHandle *handle = thread->handle;
1807 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1811 if (mono_thread_current_check_pending_interrupt ())
1814 LOCK_THREAD (thread);
1816 if ((thread->state & ThreadState_Unstarted) != 0) {
1817 UNLOCK_THREAD (thread);
1819 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1823 MonoNativeThreadId tid = thread_get_tid (thread);
1825 UNLOCK_THREAD (thread);
1828 ms = MONO_INFINITE_WAIT;
1829 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1831 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1833 ret = mono_join_uninterrupted (handle, ms, &error);
1835 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1837 mono_error_set_pending_exception (&error);
1839 if (ret == MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1840 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1843 /* TODO: Do this on Unix platforms as well. See PR #5454 for context. */
1844 /* Wait for the thread to really exit */
1846 /* This shouldn't block */
1847 mono_threads_join_lock ();
1848 mono_native_thread_join (tid);
1849 mono_threads_join_unlock ();
1856 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1861 #define MANAGED_WAIT_FAILED 0x7fffffff
1864 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1866 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1867 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1868 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1869 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1870 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1871 return WAIT_IO_COMPLETION;
1872 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1873 return WAIT_TIMEOUT;
1874 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1875 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1876 return MANAGED_WAIT_FAILED;
1878 g_error ("%s: unknown val value %d", __func__, val);
1883 ves_icall_System_Threading_WaitHandle_Wait_internal (gpointer *handles, gint32 numhandles, MonoBoolean waitall, gint32 timeout, MonoError *error)
1885 MonoW32HandleWaitRet ret;
1886 MonoInternalThread *thread;
1889 guint32 timeoutLeft;
1891 /* Do this WaitSleepJoin check before creating objects */
1892 if (mono_thread_current_check_pending_interrupt ())
1893 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1895 thread = mono_thread_internal_current ();
1897 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1900 timeout = MONO_INFINITE_WAIT;
1901 if (timeout != MONO_INFINITE_WAIT)
1902 start = mono_msec_ticks ();
1904 timeoutLeft = timeout;
1909 if (numhandles != 1)
1910 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, timeoutLeft, TRUE), numhandles);
1912 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], timeoutLeft, TRUE), 1);
1914 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1915 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, timeoutLeft, TRUE);
1916 #endif /* HOST_WIN32 */
1919 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1922 exc = mono_thread_execute_interruption ();
1924 mono_error_set_exception_instance (error, exc);
1928 if (timeout != MONO_INFINITE_WAIT) {
1931 elapsed = mono_msec_ticks () - start;
1932 if (elapsed >= timeout) {
1933 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1937 timeoutLeft = timeout - elapsed;
1941 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1943 return map_native_wait_result_to_managed (ret, numhandles);
1947 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (gpointer toSignal, gpointer toWait, gint32 ms, MonoError *error)
1949 MonoW32HandleWaitRet ret;
1950 MonoInternalThread *thread = mono_thread_internal_current ();
1953 ms = MONO_INFINITE_WAIT;
1955 if (mono_thread_current_check_pending_interrupt ())
1956 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1958 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1962 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
1964 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
1968 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1970 return map_native_wait_result_to_managed (ret, 1);
1973 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1975 return InterlockedIncrement (location);
1978 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1980 #if SIZEOF_VOID_P == 4
1981 if (G_UNLIKELY ((size_t)location & 0x7)) {
1983 mono_interlocked_lock ();
1986 mono_interlocked_unlock ();
1990 return InterlockedIncrement64 (location);
1993 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1995 return InterlockedDecrement(location);
1998 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2000 #if SIZEOF_VOID_P == 4
2001 if (G_UNLIKELY ((size_t)location & 0x7)) {
2003 mono_interlocked_lock ();
2006 mono_interlocked_unlock ();
2010 return InterlockedDecrement64 (location);
2013 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2015 return InterlockedExchange(location, value);
2018 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2021 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2022 mono_gc_wbarrier_generic_nostore (location);
2026 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2028 return InterlockedExchangePointer(location, value);
2031 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2033 IntFloatUnion val, ret;
2036 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2042 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2044 #if SIZEOF_VOID_P == 4
2045 if (G_UNLIKELY ((size_t)location & 0x7)) {
2047 mono_interlocked_lock ();
2050 mono_interlocked_unlock ();
2054 return InterlockedExchange64 (location, value);
2058 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2060 LongDoubleUnion val, ret;
2063 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2068 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2070 return InterlockedCompareExchange(location, value, comparand);
2073 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2075 gint32 r = InterlockedCompareExchange(location, value, comparand);
2076 *success = r == comparand;
2080 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2083 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2084 mono_gc_wbarrier_generic_nostore (location);
2088 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2090 return InterlockedCompareExchangePointer(location, value, comparand);
2093 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2095 IntFloatUnion val, ret, cmp;
2098 cmp.fval = comparand;
2099 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2105 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2107 #if SIZEOF_VOID_P == 8
2108 LongDoubleUnion val, comp, ret;
2111 comp.fval = comparand;
2112 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2118 mono_interlocked_lock ();
2120 if (old == comparand)
2122 mono_interlocked_unlock ();
2129 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2131 #if SIZEOF_VOID_P == 4
2132 if (G_UNLIKELY ((size_t)location & 0x7)) {
2134 mono_interlocked_lock ();
2136 if (old == comparand)
2138 mono_interlocked_unlock ();
2142 return InterlockedCompareExchange64 (location, value, comparand);
2146 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2149 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2150 mono_gc_wbarrier_generic_nostore (location);
2155 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2158 MONO_CHECK_NULL (location, NULL);
2159 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2160 mono_gc_wbarrier_generic_nostore (location);
2165 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2167 return InterlockedAdd (location, value);
2171 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2173 #if SIZEOF_VOID_P == 4
2174 if (G_UNLIKELY ((size_t)location & 0x7)) {
2176 mono_interlocked_lock ();
2179 mono_interlocked_unlock ();
2183 return InterlockedAdd64 (location, value);
2187 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2189 #if SIZEOF_VOID_P == 4
2190 if (G_UNLIKELY ((size_t)location & 0x7)) {
2192 mono_interlocked_lock ();
2194 mono_interlocked_unlock ();
2198 return InterlockedRead64 (location);
2202 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2204 mono_memory_barrier ();
2208 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2210 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2212 if (state & ThreadState_Background) {
2213 /* If the thread changes the background mode, the main thread has to
2214 * be notified, since it has to rebuild the list of threads to
2217 mono_os_event_set (&background_change_event);
2222 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2224 mono_thread_set_state (this_obj, (MonoThreadState)state);
2226 if (state & ThreadState_Background) {
2227 /* If the thread changes the background mode, the main thread has to
2228 * be notified, since it has to rebuild the list of threads to
2231 mono_os_event_set (&background_change_event);
2236 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2240 LOCK_THREAD (this_obj);
2242 state = this_obj->state;
2244 UNLOCK_THREAD (this_obj);
2249 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2251 MonoInternalThread *current;
2253 MonoInternalThread *thread = this_obj->internal_thread;
2255 LOCK_THREAD (thread);
2257 current = mono_thread_internal_current ();
2259 thread->thread_interrupt_requested = TRUE;
2260 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2262 UNLOCK_THREAD (thread);
2265 async_abort_internal (thread, FALSE);
2270 * mono_thread_current_check_pending_interrupt:
2271 * Checks if there's a interruption request and set the pending exception if so.
2272 * \returns true if a pending exception was set
2275 mono_thread_current_check_pending_interrupt (void)
2277 MonoInternalThread *thread = mono_thread_internal_current ();
2278 gboolean throw_ = FALSE;
2280 LOCK_THREAD (thread);
2282 if (thread->thread_interrupt_requested) {
2284 thread->thread_interrupt_requested = FALSE;
2287 UNLOCK_THREAD (thread);
2290 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2295 request_thread_abort (MonoInternalThread *thread, MonoObject *state, gboolean appdomain_unload)
2297 LOCK_THREAD (thread);
2299 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2301 UNLOCK_THREAD (thread);
2305 if ((thread->state & ThreadState_Unstarted) != 0) {
2306 thread->state |= ThreadState_Aborted;
2307 UNLOCK_THREAD (thread);
2311 thread->state |= ThreadState_AbortRequested;
2312 if (appdomain_unload)
2313 thread->flags |= MONO_THREAD_FLAG_APPDOMAIN_ABORT;
2315 thread->flags &= ~MONO_THREAD_FLAG_APPDOMAIN_ABORT;
2317 if (thread->abort_state_handle)
2318 mono_gchandle_free (thread->abort_state_handle);
2320 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2321 g_assert (thread->abort_state_handle);
2323 thread->abort_state_handle = 0;
2325 thread->abort_exc = NULL;
2327 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));
2329 /* During shutdown, we can't wait for other threads */
2331 /* Make sure the thread is awake */
2332 mono_thread_resume (thread);
2334 UNLOCK_THREAD (thread);
2339 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2341 if (!request_thread_abort (thread, state, FALSE))
2344 if (thread == mono_thread_internal_current ()) {
2346 self_abort_internal (&error);
2347 mono_error_set_pending_exception (&error);
2349 async_abort_internal (thread, TRUE);
2354 * mono_thread_internal_abort:
2355 * Request thread \p thread to be aborted.
2356 * \p thread MUST NOT be the current thread.
2359 mono_thread_internal_abort (MonoInternalThread *thread, gboolean appdomain_unload)
2361 g_assert (thread != mono_thread_internal_current ());
2363 if (!request_thread_abort (thread, NULL, appdomain_unload))
2365 async_abort_internal (thread, TRUE);
2369 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2371 MonoInternalThread *thread = mono_thread_internal_current ();
2372 gboolean was_aborting, is_domain_abort;
2374 LOCK_THREAD (thread);
2375 was_aborting = thread->state & ThreadState_AbortRequested;
2376 is_domain_abort = thread->flags & MONO_THREAD_FLAG_APPDOMAIN_ABORT;
2378 if (was_aborting && !is_domain_abort)
2379 thread->state &= ~ThreadState_AbortRequested;
2380 UNLOCK_THREAD (thread);
2382 if (!was_aborting) {
2383 const char *msg = "Unable to reset abort because no abort was requested";
2384 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2386 } else if (is_domain_abort) {
2387 /* Silently ignore abort resets in unloading appdomains */
2391 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2392 thread->abort_exc = NULL;
2393 if (thread->abort_state_handle) {
2394 mono_gchandle_free (thread->abort_state_handle);
2395 /* This is actually not necessary - the handle
2396 only counts if the exception is set */
2397 thread->abort_state_handle = 0;
2402 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2404 LOCK_THREAD (thread);
2406 thread->state &= ~ThreadState_AbortRequested;
2408 if (thread->abort_exc) {
2409 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2410 thread->abort_exc = NULL;
2411 if (thread->abort_state_handle) {
2412 mono_gchandle_free (thread->abort_state_handle);
2413 /* This is actually not necessary - the handle
2414 only counts if the exception is set */
2415 thread->abort_state_handle = 0;
2419 UNLOCK_THREAD (thread);
2423 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2426 MonoInternalThread *thread = this_obj->internal_thread;
2427 MonoObject *state, *deserialized = NULL;
2430 if (!thread->abort_state_handle)
2433 state = mono_gchandle_get_target (thread->abort_state_handle);
2436 domain = mono_domain_get ();
2437 if (mono_object_domain (state) == domain)
2440 deserialized = mono_object_xdomain_representation (state, domain, &error);
2442 if (!deserialized) {
2443 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2444 if (!is_ok (&error)) {
2445 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2446 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2448 mono_set_pending_exception (invalid_op_exc);
2452 return deserialized;
2456 mono_thread_suspend (MonoInternalThread *thread)
2458 LOCK_THREAD (thread);
2460 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2462 UNLOCK_THREAD (thread);
2466 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2468 UNLOCK_THREAD (thread);
2472 thread->state |= ThreadState_SuspendRequested;
2473 mono_os_event_reset (thread->suspended);
2475 if (thread == mono_thread_internal_current ()) {
2476 /* calls UNLOCK_THREAD (thread) */
2477 self_suspend_internal ();
2479 /* calls UNLOCK_THREAD (thread) */
2480 async_suspend_internal (thread, FALSE);
2487 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2489 if (!mono_thread_suspend (this_obj->internal_thread)) {
2490 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2495 /* LOCKING: LOCK_THREAD(thread) must be held */
2497 mono_thread_resume (MonoInternalThread *thread)
2499 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2500 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2501 thread->state &= ~ThreadState_SuspendRequested;
2502 mono_os_event_set (thread->suspended);
2506 if ((thread->state & ThreadState_Suspended) == 0 ||
2507 (thread->state & ThreadState_Unstarted) != 0 ||
2508 (thread->state & ThreadState_Aborted) != 0 ||
2509 (thread->state & ThreadState_Stopped) != 0)
2511 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2515 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2517 mono_os_event_set (thread->suspended);
2519 if (!thread->self_suspended) {
2520 UNLOCK_THREAD (thread);
2522 /* Awake the thread */
2523 if (!mono_thread_info_resume (thread_get_tid (thread)))
2526 LOCK_THREAD (thread);
2529 thread->state &= ~ThreadState_Suspended;
2535 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2537 if (!thread->internal_thread) {
2538 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2540 LOCK_THREAD (thread->internal_thread);
2541 if (!mono_thread_resume (thread->internal_thread))
2542 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2543 UNLOCK_THREAD (thread->internal_thread);
2548 mono_threads_is_critical_method (MonoMethod *method)
2550 switch (method->wrapper_type) {
2551 case MONO_WRAPPER_RUNTIME_INVOKE:
2552 case MONO_WRAPPER_XDOMAIN_INVOKE:
2553 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2560 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2565 if (mono_threads_is_critical_method (m)) {
2566 *((gboolean*)data) = TRUE;
2573 is_running_protected_wrapper (void)
2575 gboolean found = FALSE;
2576 mono_stack_walk (find_wrapper, &found);
2584 mono_thread_stop (MonoThread *thread)
2586 MonoInternalThread *internal = thread->internal_thread;
2588 if (!request_thread_abort (internal, NULL, FALSE))
2591 if (internal == mono_thread_internal_current ()) {
2593 self_abort_internal (&error);
2595 This function is part of the embeding API and has no way to return the exception
2596 to be thrown. So what we do is keep the old behavior and raise the exception.
2598 mono_error_raise_exception (&error); /* OK to throw, see note */
2600 async_abort_internal (internal, TRUE);
2605 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2607 gint8 tmp = *(volatile gint8 *)ptr;
2608 mono_memory_barrier ();
2613 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2615 gint16 tmp = *(volatile gint16 *)ptr;
2616 mono_memory_barrier ();
2621 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2623 gint32 tmp = *(volatile gint32 *)ptr;
2624 mono_memory_barrier ();
2629 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2631 gint64 tmp = *(volatile gint64 *)ptr;
2632 mono_memory_barrier ();
2637 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2639 volatile void *tmp = *(volatile void **)ptr;
2640 mono_memory_barrier ();
2641 return (void *) tmp;
2645 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2647 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2648 mono_memory_barrier ();
2649 return (MonoObject *) tmp;
2653 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2655 double tmp = *(volatile double *)ptr;
2656 mono_memory_barrier ();
2661 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2663 float tmp = *(volatile float *)ptr;
2664 mono_memory_barrier ();
2669 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2671 return InterlockedRead8 ((volatile gint8 *)ptr);
2675 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2677 return InterlockedRead16 ((volatile gint16 *)ptr);
2681 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2683 return InterlockedRead ((volatile gint32 *)ptr);
2687 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2689 #if SIZEOF_VOID_P == 4
2690 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2692 mono_interlocked_lock ();
2693 val = *(gint64*)ptr;
2694 mono_interlocked_unlock ();
2698 return InterlockedRead64 ((volatile gint64 *)ptr);
2702 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2704 return InterlockedReadPointer ((volatile gpointer *)ptr);
2708 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2712 #if SIZEOF_VOID_P == 4
2713 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2715 mono_interlocked_lock ();
2716 val = *(double*)ptr;
2717 mono_interlocked_unlock ();
2722 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2728 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2732 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2738 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2740 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2744 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2746 mono_memory_barrier ();
2747 *(volatile gint8 *)ptr = value;
2751 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2753 mono_memory_barrier ();
2754 *(volatile gint16 *)ptr = value;
2758 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2760 mono_memory_barrier ();
2761 *(volatile gint32 *)ptr = value;
2765 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2767 mono_memory_barrier ();
2768 *(volatile gint64 *)ptr = value;
2772 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2774 mono_memory_barrier ();
2775 *(volatile void **)ptr = value;
2779 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2781 mono_memory_barrier ();
2782 mono_gc_wbarrier_generic_store (ptr, value);
2786 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2788 mono_memory_barrier ();
2789 *(volatile double *)ptr = value;
2793 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2795 mono_memory_barrier ();
2796 *(volatile float *)ptr = value;
2800 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2802 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2806 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2808 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2812 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2814 InterlockedWrite ((volatile gint32 *)ptr, value);
2818 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2820 #if SIZEOF_VOID_P == 4
2821 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2822 mono_interlocked_lock ();
2823 *(gint64*)ptr = value;
2824 mono_interlocked_unlock ();
2829 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2833 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2835 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2839 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2843 #if SIZEOF_VOID_P == 4
2844 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2845 mono_interlocked_lock ();
2846 *(double*)ptr = value;
2847 mono_interlocked_unlock ();
2854 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2858 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2864 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2868 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2870 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2874 free_context (void *user_data)
2876 ContextStaticData *data = user_data;
2878 mono_threads_lock ();
2881 * There is no guarantee that, by the point this reference queue callback
2882 * has been invoked, the GC handle associated with the object will fail to
2883 * resolve as one might expect. So if we don't free and remove the GC
2884 * handle here, free_context_static_data_helper () could end up resolving
2885 * a GC handle to an actually-dead context which would contain a pointer
2886 * to an already-freed static data segment, resulting in a crash when
2889 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2891 mono_threads_unlock ();
2893 mono_gchandle_free (data->gc_handle);
2894 mono_free_static_data (data->static_data);
2899 mono_threads_register_app_context (MonoAppContext *ctx, MonoError *error)
2902 mono_threads_lock ();
2904 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2907 contexts = g_hash_table_new (NULL, NULL);
2910 context_queue = mono_gc_reference_queue_new (free_context);
2912 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2913 g_hash_table_insert (contexts, gch, gch);
2916 * We use this intermediate structure to contain a duplicate pointer to
2917 * the static data because we can't rely on being able to resolve the GC
2918 * handle in the reference queue callback.
2920 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2921 data->gc_handle = GPOINTER_TO_UINT (gch);
2924 context_adjust_static_data (ctx);
2925 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2927 mono_threads_unlock ();
2929 MONO_PROFILER_RAISE (context_loaded, (ctx));
2933 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContextHandle ctx, MonoError *error)
2936 mono_threads_register_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_register_app_context */
2940 mono_threads_release_app_context (MonoAppContext* ctx, MonoError *error)
2943 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2944 * cleanup in exceptional circumstances, we don't actually do any
2945 * cleanup work here. We instead do this via a reference queue.
2948 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2950 MONO_PROFILER_RAISE (context_unloaded, (ctx));
2954 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContextHandle ctx, MonoError *error)
2957 mono_threads_release_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_release_app_context */
2960 void mono_thread_init (MonoThreadStartCB start_cb,
2961 MonoThreadAttachCB attach_cb)
2963 mono_coop_mutex_init_recursive (&threads_mutex);
2965 mono_os_mutex_init_recursive(&interlocked_mutex);
2966 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2968 mono_os_event_init (&background_change_event, FALSE);
2970 mono_init_static_data_info (&thread_static_info);
2971 mono_init_static_data_info (&context_static_info);
2973 mono_thread_start_cb = start_cb;
2974 mono_thread_attach_cb = attach_cb;
2978 thread_attach (MonoThreadInfo *info)
2980 return mono_gc_thread_attach (info);
2984 thread_detach (MonoThreadInfo *info)
2986 MonoInternalThread *internal;
2989 /* If a delegate is passed to native code and invoked on a thread we dont
2990 * know about, marshal will register it with mono_threads_attach_coop, but
2991 * we have no way of knowing when that thread goes away. SGen has a TSD
2992 * so we assume that if the domain is still registered, we can detach
2997 if (!mono_thread_info_try_get_internal_thread_gchandle (info, &gchandle))
3000 internal = (MonoInternalThread*) mono_gchandle_get_target (gchandle);
3001 g_assert (internal);
3003 mono_gchandle_free (gchandle);
3005 mono_thread_detach_internal (internal);
3009 thread_detach_with_lock (MonoThreadInfo *info)
3011 return mono_gc_thread_detach_with_lock (info);
3015 thread_in_critical_region (MonoThreadInfo *info)
3017 return mono_gc_thread_in_critical_region (info);
3021 ip_in_critical_region (MonoDomain *domain, gpointer ip)
3027 * We pass false for 'try_aot' so this becomes async safe.
3028 * It won't find aot methods whose jit info is not yet loaded,
3029 * so we preload their jit info in the JIT.
3031 ji = mono_jit_info_table_find_internal (domain, ip, FALSE, FALSE);
3035 method = mono_jit_info_get_method (ji);
3038 return mono_gc_is_critical_method (method);
3042 mono_thread_callbacks_init (void)
3044 MonoThreadInfoCallbacks cb;
3046 memset (&cb, 0, sizeof(cb));
3047 cb.thread_attach = thread_attach;
3048 cb.thread_detach = thread_detach;
3049 cb.thread_detach_with_lock = thread_detach_with_lock;
3050 cb.ip_in_critical_region = ip_in_critical_region;
3051 cb.thread_in_critical_region = thread_in_critical_region;
3052 mono_thread_info_callbacks_init (&cb);
3056 * mono_thread_cleanup:
3059 mono_thread_cleanup (void)
3061 mono_threads_join_threads ();
3063 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3064 /* The main thread must abandon any held mutexes (particularly
3065 * important for named mutexes as they are shared across
3066 * processes, see bug 74680.) This will happen when the
3067 * thread exits, but if it's not running in a subthread it
3068 * won't exit in time.
3070 mono_w32mutex_abandon ();
3074 /* This stuff needs more testing, it seems one of these
3075 * critical sections can be locked when mono_thread_cleanup is
3078 mono_coop_mutex_destroy (&threads_mutex);
3079 mono_os_mutex_destroy (&interlocked_mutex);
3080 mono_os_mutex_destroy (&delayed_free_table_mutex);
3081 mono_os_mutex_destroy (&small_id_mutex);
3082 mono_os_event_destroy (&background_change_event);
3087 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3089 mono_thread_cleanup_fn = func;
3093 * mono_thread_set_manage_callback:
3096 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3098 thread->internal_thread->manage_callback = func;
3102 static void print_tids (gpointer key, gpointer value, gpointer user)
3104 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3105 * sizeof(uint) and a cast to uint would overflow
3107 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3108 * print this as a pointer.
3110 g_message ("Waiting for: %p", key);
3115 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3116 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3121 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3124 MonoThreadInfoWaitRet ret;
3126 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3128 /* Add the thread state change event, so it wakes
3129 * up if a thread changes to background mode. */
3132 if (check_state_change)
3133 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3135 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3138 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3139 /* See the comment in build_wait_tids() */
3140 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3144 for( i = 0; i < wait->num; i++)
3145 mono_threads_close_thread_handle (wait->handles [i]);
3147 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3150 if (ret < wait->num) {
3151 MonoInternalThread *internal;
3153 internal = wait->threads [ret];
3155 mono_threads_lock ();
3156 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3157 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3158 mono_threads_unlock ();
3162 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3164 struct wait_data *wait=(struct wait_data *)user;
3166 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3167 MonoInternalThread *thread=(MonoInternalThread *)value;
3169 /* Ignore background threads, we abort them later */
3170 /* Do not lock here since it is not needed and the caller holds threads_lock */
3171 if (thread->state & ThreadState_Background) {
3172 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3173 return; /* just leave, ignore */
3176 if (mono_gc_is_finalizer_internal_thread (thread)) {
3177 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3181 if (thread == mono_thread_internal_current ()) {
3182 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3186 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3187 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3191 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3192 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3196 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3197 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3198 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3199 wait->threads[wait->num]=thread;
3202 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3204 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3209 /* Just ignore the rest, we can't do anything with
3216 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3218 struct wait_data *wait=(struct wait_data *)user;
3219 MonoNativeThreadId self = mono_native_thread_id_get ();
3220 MonoInternalThread *thread = (MonoInternalThread *)value;
3222 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3225 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3227 if (mono_gc_is_finalizer_internal_thread (thread))
3230 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3231 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3232 wait->threads[wait->num] = thread;
3235 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3236 mono_thread_internal_abort (thread, FALSE);
3243 * mono_threads_set_shutting_down:
3245 * Is called by a thread that wants to shut down Mono. If the runtime is already
3246 * shutting down, the calling thread is suspended/stopped, and this function never
3250 mono_threads_set_shutting_down (void)
3252 MonoInternalThread *current_thread = mono_thread_internal_current ();
3254 mono_threads_lock ();
3256 if (shutting_down) {
3257 mono_threads_unlock ();
3259 /* Make sure we're properly suspended/stopped */
3261 LOCK_THREAD (current_thread);
3263 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3264 UNLOCK_THREAD (current_thread);
3265 mono_thread_execute_interruption ();
3267 UNLOCK_THREAD (current_thread);
3270 /*since we're killing the thread, detach it.*/
3271 mono_thread_detach_internal (current_thread);
3273 /* Wake up other threads potentially waiting for us */
3274 mono_thread_info_exit (0);
3276 shutting_down = TRUE;
3278 /* Not really a background state change, but this will
3279 * interrupt the main thread if it is waiting for all
3280 * the other threads.
3282 mono_os_event_set (&background_change_event);
3284 mono_threads_unlock ();
3289 * mono_thread_manage:
3292 mono_thread_manage (void)
3294 struct wait_data wait_data;
3295 struct wait_data *wait = &wait_data;
3297 memset (wait, 0, sizeof (struct wait_data));
3298 /* join each thread that's still running */
3299 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3301 mono_threads_lock ();
3303 THREAD_DEBUG (g_message("%s: No threads", __func__));
3304 mono_threads_unlock ();
3307 mono_threads_unlock ();
3310 mono_threads_lock ();
3311 if (shutting_down) {
3312 /* somebody else is shutting down */
3313 mono_threads_unlock ();
3316 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3317 mono_g_hash_table_foreach (threads, print_tids, NULL));
3319 mono_os_event_reset (&background_change_event);
3321 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3322 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3323 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3324 mono_threads_unlock ();
3326 /* Something to wait for */
3327 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3328 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3329 } while(wait->num>0);
3331 /* Mono is shutting down, so just wait for the end */
3332 if (!mono_runtime_try_shutdown ()) {
3333 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3334 mono_thread_suspend (mono_thread_internal_current ());
3335 mono_thread_execute_interruption ();
3339 * Remove everything but the finalizer thread and self.
3340 * Also abort all the background threads
3343 mono_threads_lock ();
3346 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3347 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3348 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3350 mono_threads_unlock ();
3352 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3353 if (wait->num > 0) {
3354 /* Something to wait for */
3355 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3357 } while (wait->num > 0);
3360 * give the subthreads a chance to really quit (this is mainly needed
3361 * to get correct user and system times from getrusage/wait/time(1)).
3362 * This could be removed if we avoid pthread_detach() and use pthread_join().
3364 mono_thread_info_yield ();
3368 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3370 MonoInternalThread *thread = (MonoInternalThread*)value;
3371 struct wait_data *wait = (struct wait_data*)user_data;
3374 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3376 * This needs no locking.
3378 if ((thread->state & ThreadState_Suspended) != 0 ||
3379 (thread->state & ThreadState_Stopped) != 0)
3382 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3383 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3384 wait->threads [wait->num] = thread;
3390 * mono_thread_suspend_all_other_threads:
3392 * Suspend all managed threads except the finalizer thread and this thread. It is
3393 * not possible to resume them later.
3395 void mono_thread_suspend_all_other_threads (void)
3397 struct wait_data wait_data;
3398 struct wait_data *wait = &wait_data;
3400 MonoNativeThreadId self = mono_native_thread_id_get ();
3401 guint32 eventidx = 0;
3402 gboolean starting, finished;
3404 memset (wait, 0, sizeof (struct wait_data));
3406 * The other threads could be in an arbitrary state at this point, i.e.
3407 * they could be starting up, shutting down etc. This means that there could be
3408 * threads which are not even in the threads hash table yet.
3412 * First we set a barrier which will be checked by all threads before they
3413 * are added to the threads hash table, and they will exit if the flag is set.
3414 * This ensures that no threads could be added to the hash later.
3415 * We will use shutting_down as the barrier for now.
3417 g_assert (shutting_down);
3420 * We make multiple calls to WaitForMultipleObjects since:
3421 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3422 * - some threads could exit without becoming suspended
3427 * Make a copy of the hashtable since we can't do anything with
3428 * threads while threads_mutex is held.
3431 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3432 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3433 mono_threads_lock ();
3434 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3435 mono_threads_unlock ();
3438 /* Get the suspended events that we'll be waiting for */
3439 for (i = 0; i < wait->num; ++i) {
3440 MonoInternalThread *thread = wait->threads [i];
3442 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3443 || mono_gc_is_finalizer_internal_thread (thread)
3444 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3446 mono_threads_close_thread_handle (wait->handles [i]);
3447 wait->threads [i] = NULL;
3451 LOCK_THREAD (thread);
3453 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3454 UNLOCK_THREAD (thread);
3455 mono_threads_close_thread_handle (wait->handles [i]);
3456 wait->threads [i] = NULL;
3462 /* Convert abort requests into suspend requests */
3463 if ((thread->state & ThreadState_AbortRequested) != 0)
3464 thread->state &= ~ThreadState_AbortRequested;
3466 thread->state |= ThreadState_SuspendRequested;
3467 mono_os_event_reset (thread->suspended);
3469 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3470 async_suspend_internal (thread, TRUE);
3472 mono_threads_close_thread_handle (wait->handles [i]);
3473 wait->threads [i] = NULL;
3475 if (eventidx <= 0) {
3477 * If there are threads which are starting up, we wait until they
3478 * are suspended when they try to register in the threads hash.
3479 * This is guaranteed to finish, since the threads which can create new
3480 * threads get suspended after a while.
3481 * FIXME: The finalizer thread can still create new threads.
3483 mono_threads_lock ();
3484 if (threads_starting_up)
3485 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3488 mono_threads_unlock ();
3490 mono_thread_info_sleep (100, NULL);
3498 MonoInternalThread *thread;
3499 MonoStackFrameInfo *frames;
3500 int nframes, max_frames;
3501 int nthreads, max_threads;
3502 MonoInternalThread **threads;
3503 } ThreadDumpUserData;
3505 static gboolean thread_dump_requested;
3507 /* This needs to be async safe */
3509 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3511 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3513 if (ud->nframes < ud->max_frames) {
3514 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3521 /* This needs to be async safe */
3522 static SuspendThreadResult
3523 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3525 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3526 MonoInternalThread *thread = user_data->thread;
3529 /* This no longer works with remote unwinding */
3530 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3531 mono_thread_internal_describe (thread, text);
3532 g_string_append (text, "\n");
3535 if (thread == mono_thread_internal_current ())
3536 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3538 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3540 return MonoResumeThread;
3544 int nthreads, max_threads;
3545 MonoInternalThread **threads;
3546 } CollectThreadsUserData;
3549 collect_thread (gpointer key, gpointer value, gpointer user)
3551 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3552 MonoInternalThread *thread = (MonoInternalThread *)value;
3554 if (ud->nthreads < ud->max_threads)
3555 ud->threads [ud->nthreads ++] = thread;
3559 * Collect running threads into the THREADS array.
3560 * THREADS should be an array allocated on the stack.
3563 collect_threads (MonoInternalThread **thread_array, int max_threads)
3565 CollectThreadsUserData ud;
3567 memset (&ud, 0, sizeof (ud));
3568 /* This array contains refs, but its on the stack, so its ok */
3569 ud.threads = thread_array;
3570 ud.max_threads = max_threads;
3572 mono_threads_lock ();
3573 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3574 mono_threads_unlock ();
3580 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3582 GString* text = g_string_new (0);
3584 GError *error = NULL;
3587 ud->thread = thread;
3590 /* Collect frames for the thread */
3591 if (thread == mono_thread_internal_current ()) {
3592 get_thread_dump (mono_thread_info_current (), ud);
3594 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3598 * Do all the non async-safe work outside of get_thread_dump.
3601 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3603 g_string_append_printf (text, "\n\"%s\"", name);
3606 else if (thread->threadpool_thread) {
3607 g_string_append (text, "\n\"<threadpool thread>\"");
3609 g_string_append (text, "\n\"<unnamed thread>\"");
3612 for (i = 0; i < ud->nframes; ++i) {
3613 MonoStackFrameInfo *frame = &ud->frames [i];
3614 MonoMethod *method = NULL;
3616 if (frame->type == FRAME_TYPE_MANAGED)
3617 method = mono_jit_info_get_method (frame->ji);
3620 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3621 g_string_append_printf (text, " %s\n", location);
3624 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3628 fprintf (stdout, "%s", text->str);
3630 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3631 OutputDebugStringA(text->str);
3634 g_string_free (text, TRUE);
3639 mono_threads_perform_thread_dump (void)
3641 ThreadDumpUserData ud;
3642 MonoInternalThread *thread_array [128];
3643 int tindex, nthreads;
3645 if (!thread_dump_requested)
3648 printf ("Full thread dump:\n");
3650 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3651 nthreads = collect_threads (thread_array, 128);
3653 memset (&ud, 0, sizeof (ud));
3654 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3655 ud.max_frames = 256;
3657 for (tindex = 0; tindex < nthreads; ++tindex)
3658 dump_thread (thread_array [tindex], &ud);
3662 thread_dump_requested = FALSE;
3665 /* Obtain the thread dump of all threads */
3667 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3670 ThreadDumpUserData ud;
3671 MonoInternalThread *thread_array [128];
3672 MonoDomain *domain = mono_domain_get ();
3673 MonoDebugSourceLocation *location;
3674 int tindex, nthreads;
3678 *out_threads = NULL;
3679 *out_stack_frames = NULL;
3681 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3682 nthreads = collect_threads (thread_array, 128);
3684 memset (&ud, 0, sizeof (ud));
3685 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3686 ud.max_frames = 256;
3688 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3691 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3695 for (tindex = 0; tindex < nthreads; ++tindex) {
3696 MonoInternalThread *thread = thread_array [tindex];
3697 MonoArray *thread_frames;
3703 /* Collect frames for the thread */
3704 if (thread == mono_thread_internal_current ()) {
3705 get_thread_dump (mono_thread_info_current (), &ud);
3707 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3710 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3712 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3715 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3717 for (i = 0; i < ud.nframes; ++i) {
3718 MonoStackFrameInfo *frame = &ud.frames [i];
3719 MonoMethod *method = NULL;
3720 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3724 sf->native_offset = frame->native_offset;
3726 if (frame->type == FRAME_TYPE_MANAGED)
3727 method = mono_jit_info_get_method (frame->ji);
3730 sf->method_address = (gsize) frame->ji->code_start;
3732 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3735 MONO_OBJECT_SETREF (sf, method, rm);
3737 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3739 sf->il_offset = location->il_offset;
3741 if (location && location->source_file) {
3742 MonoString *filename = mono_string_new_checked (domain, location->source_file, error);
3745 MONO_OBJECT_SETREF (sf, filename, filename);
3746 sf->line = location->row;
3747 sf->column = location->column;
3749 mono_debug_free_source_location (location);
3754 mono_array_setref (thread_frames, i, sf);
3760 return is_ok (error);
3764 * mono_threads_request_thread_dump:
3766 * Ask all threads except the current to print their stacktrace to stdout.
3769 mono_threads_request_thread_dump (void)
3771 /*The new thread dump code runs out of the finalizer thread. */
3772 thread_dump_requested = TRUE;
3773 mono_gc_finalize_notify ();
3778 gint allocated; /* +1 so that refs [allocated] == NULL */
3782 typedef struct ref_stack RefStack;
3785 ref_stack_new (gint initial_size)
3789 initial_size = MAX (initial_size, 16) + 1;
3790 rs = g_new0 (RefStack, 1);
3791 rs->refs = g_new0 (gpointer, initial_size);
3792 rs->allocated = initial_size;
3797 ref_stack_destroy (gpointer ptr)
3799 RefStack *rs = (RefStack *)ptr;
3808 ref_stack_push (RefStack *rs, gpointer ptr)
3810 g_assert (rs != NULL);
3812 if (rs->bottom >= rs->allocated) {
3813 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3814 rs->allocated <<= 1;
3815 rs->refs [rs->allocated] = NULL;
3817 rs->refs [rs->bottom++] = ptr;
3821 ref_stack_pop (RefStack *rs)
3823 if (rs == NULL || rs->bottom == 0)
3827 rs->refs [rs->bottom] = NULL;
3831 ref_stack_find (RefStack *rs, gpointer ptr)
3838 for (refs = rs->refs; refs && *refs; refs++) {
3846 * mono_thread_push_appdomain_ref:
3848 * Register that the current thread may have references to objects in domain
3849 * @domain on its stack. Each call to this function should be paired with a
3850 * call to pop_appdomain_ref.
3853 mono_thread_push_appdomain_ref (MonoDomain *domain)
3855 MonoInternalThread *thread = mono_thread_internal_current ();
3858 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3859 SPIN_LOCK (thread->lock_thread_id);
3860 if (thread->appdomain_refs == NULL)
3861 thread->appdomain_refs = ref_stack_new (16);
3862 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3863 SPIN_UNLOCK (thread->lock_thread_id);
3868 mono_thread_pop_appdomain_ref (void)
3870 MonoInternalThread *thread = mono_thread_internal_current ();
3873 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3874 SPIN_LOCK (thread->lock_thread_id);
3875 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3876 SPIN_UNLOCK (thread->lock_thread_id);
3881 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3884 SPIN_LOCK (thread->lock_thread_id);
3885 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3886 SPIN_UNLOCK (thread->lock_thread_id);
3891 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3893 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3896 typedef struct abort_appdomain_data {
3897 struct wait_data wait;
3899 } abort_appdomain_data;
3902 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3904 MonoInternalThread *thread = (MonoInternalThread*)value;
3905 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3906 MonoDomain *domain = data->domain;
3908 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3909 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3911 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3912 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3913 data->wait.threads [data->wait.num] = thread;
3916 /* Just ignore the rest, we can't do anything with
3924 * mono_threads_abort_appdomain_threads:
3926 * Abort threads which has references to the given appdomain.
3929 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3931 abort_appdomain_data user_data;
3933 int orig_timeout = timeout;
3936 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3938 start_time = mono_msec_ticks ();
3940 mono_threads_lock ();
3942 user_data.domain = domain;
3943 user_data.wait.num = 0;
3944 /* This shouldn't take any locks */
3945 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3946 mono_threads_unlock ();
3948 if (user_data.wait.num > 0) {
3949 /* Abort the threads outside the threads lock */
3950 for (i = 0; i < user_data.wait.num; ++i)
3951 mono_thread_internal_abort (user_data.wait.threads [i], TRUE);
3954 * We should wait for the threads either to abort, or to leave the
3955 * domain. We can't do the latter, so we wait with a timeout.
3957 wait_for_tids (&user_data.wait, 100, FALSE);
3960 /* Update remaining time */
3961 timeout -= mono_msec_ticks () - start_time;
3962 start_time = mono_msec_ticks ();
3964 if (orig_timeout != -1 && timeout < 0)
3967 while (user_data.wait.num > 0);
3969 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3975 mono_thread_self_abort (void)
3978 self_abort_internal (&error);
3979 mono_error_set_pending_exception (&error);
3983 * mono_thread_get_undeniable_exception:
3985 * Return an exception which needs to be raised when leaving a catch clause.
3986 * This is used for undeniable exception propagation.
3989 mono_thread_get_undeniable_exception (void)
3991 MonoInternalThread *thread = mono_thread_internal_current ();
3993 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3996 // We don't want to have our exception effect calls made by
3997 // the catching block
3999 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
4003 * FIXME: Clear the abort exception and return an AppDomainUnloaded
4004 * exception if the thread no longer references a dying appdomain.
4006 thread->abort_exc->trace_ips = NULL;
4007 thread->abort_exc->stack_trace = NULL;
4008 return thread->abort_exc;
4011 #if MONO_SMALL_CONFIG
4012 #define NUM_STATIC_DATA_IDX 4
4013 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4017 #define NUM_STATIC_DATA_IDX 8
4018 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4019 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
4023 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
4024 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
4027 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
4029 gpointer *static_data = (gpointer *)addr;
4031 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
4032 void **ptr = (void **)static_data [i];
4037 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4038 void **p = ptr + idx;
4041 mark_func ((MonoObject**)p, gc_data);
4047 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4049 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4053 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4055 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4059 * mono_alloc_static_data
4061 * Allocate memory blocks for storing threads or context static data
4064 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4066 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4069 gpointer* static_data = *static_data_ptr;
4071 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4072 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4074 if (mono_gc_user_markers_supported ()) {
4075 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4076 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4078 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4079 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4082 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4083 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4084 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4085 *static_data_ptr = static_data;
4086 static_data [0] = static_data;
4089 for (i = 1; i <= idx; ++i) {
4090 if (static_data [i])
4093 if (mono_gc_user_markers_supported ())
4094 static_data [i] = g_malloc0 (static_data_size [i]);
4096 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4097 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4098 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4103 mono_free_static_data (gpointer* static_data)
4106 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4107 gpointer p = static_data [i];
4111 * At this point, the static data pointer array is still registered with the
4112 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4113 * data. Freeing the individual arrays without first nulling their slots
4114 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4115 * such an already freed array. See bug #13813.
4117 static_data [i] = NULL;
4118 mono_memory_write_barrier ();
4119 if (mono_gc_user_markers_supported ())
4122 mono_gc_free_fixed (p);
4124 mono_gc_free_fixed (static_data);
4128 * mono_init_static_data_info
4130 * Initializes static data counters
4132 static void mono_init_static_data_info (StaticDataInfo *static_data)
4134 static_data->idx = 0;
4135 static_data->offset = 0;
4136 static_data->freelist = NULL;
4140 * mono_alloc_static_data_slot
4142 * Generates an offset for static data. static_data contains the counters
4143 * used to generate it.
4146 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4148 if (!static_data->idx && !static_data->offset) {
4150 * we use the first chunk of the first allocation also as
4151 * an array for the rest of the data
4153 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4155 static_data->offset += align - 1;
4156 static_data->offset &= ~(align - 1);
4157 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4158 static_data->idx ++;
4159 g_assert (size <= static_data_size [static_data->idx]);
4160 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4161 static_data->offset = 0;
4163 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4164 static_data->offset += size;
4169 * LOCKING: requires that threads_mutex is held
4172 context_adjust_static_data (MonoAppContext *ctx)
4174 if (context_static_info.offset || context_static_info.idx > 0) {
4175 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4176 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4177 ctx->data->static_data = ctx->static_data;
4182 * LOCKING: requires that threads_mutex is held
4185 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4187 MonoInternalThread *thread = (MonoInternalThread *)value;
4188 guint32 offset = GPOINTER_TO_UINT (user);
4190 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4194 * LOCKING: requires that threads_mutex is held
4197 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4199 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4204 guint32 offset = GPOINTER_TO_UINT (user);
4205 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4206 ctx->data->static_data = ctx->static_data;
4209 static StaticDataFreeList*
4210 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4212 StaticDataFreeList* prev = NULL;
4213 StaticDataFreeList* tmp = static_data->freelist;
4215 if (tmp->size == size) {
4217 prev->next = tmp->next;
4219 static_data->freelist = tmp->next;
4228 #if SIZEOF_VOID_P == 4
4235 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4237 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4239 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4240 MonoBitSet *rb = sets [idx];
4241 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4242 offset /= sizeof (uintptr_t);
4243 /* offset is now the bitmap offset */
4244 for (int i = 0; i < numbits; ++i) {
4245 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4246 mono_bitset_set_fast (rb, offset + i);
4251 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4253 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4254 MonoBitSet *rb = sets [idx];
4255 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4256 offset /= sizeof (uintptr_t);
4257 /* offset is now the bitmap offset */
4258 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4259 mono_bitset_clear_fast (rb, offset + i);
4263 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4265 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4267 StaticDataInfo *info;
4270 if (static_type == SPECIAL_STATIC_THREAD) {
4271 info = &thread_static_info;
4272 sets = thread_reference_bitmaps;
4274 info = &context_static_info;
4275 sets = context_reference_bitmaps;
4278 mono_threads_lock ();
4280 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4284 offset = item->offset;
4287 offset = mono_alloc_static_data_slot (info, size, align);
4290 update_reference_bitmap (sets, offset, bitmap, numbits);
4292 if (static_type == SPECIAL_STATIC_THREAD) {
4293 /* This can be called during startup */
4294 if (threads != NULL)
4295 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4297 if (contexts != NULL)
4298 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4300 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4303 mono_threads_unlock ();
4309 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4311 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4313 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4314 return get_thread_static_data (thread, offset);
4316 return get_context_static_data (thread->current_appcontext, offset);
4321 mono_get_special_static_data (guint32 offset)
4323 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4332 * LOCKING: requires that threads_mutex is held
4335 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4337 MonoInternalThread *thread = (MonoInternalThread *)value;
4338 OffsetSize *data = (OffsetSize *)user;
4339 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4340 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4343 if (!thread->static_data || !thread->static_data [idx])
4345 ptr = ((char*) thread->static_data [idx]) + off;
4346 mono_gc_bzero_atomic (ptr, data->size);
4350 * LOCKING: requires that threads_mutex is held
4353 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4355 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4360 OffsetSize *data = (OffsetSize *)user;
4361 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4362 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4365 if (!ctx->static_data || !ctx->static_data [idx])
4368 ptr = ((char*) ctx->static_data [idx]) + off;
4369 mono_gc_bzero_atomic (ptr, data->size);
4373 do_free_special_slot (guint32 offset, guint32 size)
4375 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4377 StaticDataInfo *info;
4379 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4380 info = &thread_static_info;
4381 sets = thread_reference_bitmaps;
4383 info = &context_static_info;
4384 sets = context_reference_bitmaps;
4387 guint32 data_offset = offset;
4388 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4389 OffsetSize data = { data_offset, size };
4391 clear_reference_bitmap (sets, data.offset, data.size);
4393 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4394 if (threads != NULL)
4395 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4397 if (contexts != NULL)
4398 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4401 if (!mono_runtime_is_shutting_down ()) {
4402 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4404 item->offset = offset;
4407 item->next = info->freelist;
4408 info->freelist = item;
4413 do_free_special (gpointer key, gpointer value, gpointer data)
4415 MonoClassField *field = (MonoClassField *)key;
4416 guint32 offset = GPOINTER_TO_UINT (value);
4419 size = mono_type_size (field->type, &align);
4420 do_free_special_slot (offset, size);
4424 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4426 mono_threads_lock ();
4428 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4430 mono_threads_unlock ();
4434 static void CALLBACK dummy_apc (ULONG_PTR param)
4440 * mono_thread_execute_interruption
4442 * Performs the operation that the requested thread state requires (abort,
4445 static MonoException*
4446 mono_thread_execute_interruption (void)
4448 MonoInternalThread *thread = mono_thread_internal_current ();
4449 MonoThread *sys_thread = mono_thread_current ();
4451 LOCK_THREAD (thread);
4453 /* MonoThread::interruption_requested can only be changed with atomics */
4454 if (!mono_thread_clear_interruption_requested (thread)) {
4455 UNLOCK_THREAD (thread);
4459 /* this will consume pending APC calls */
4461 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4463 /* Clear the interrupted flag of the thread so it can wait again */
4464 mono_thread_info_clear_self_interrupt ();
4466 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4467 if (sys_thread->pending_exception) {
4470 exc = sys_thread->pending_exception;
4471 sys_thread->pending_exception = NULL;
4473 UNLOCK_THREAD (thread);
4475 } else if (thread->state & (ThreadState_AbortRequested)) {
4476 UNLOCK_THREAD (thread);
4477 g_assert (sys_thread->pending_exception == NULL);
4478 if (thread->abort_exc == NULL) {
4480 * This might be racy, but it has to be called outside the lock
4481 * since it calls managed code.
4483 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4485 return thread->abort_exc;
4486 } else if (thread->state & (ThreadState_SuspendRequested)) {
4487 /* calls UNLOCK_THREAD (thread) */
4488 self_suspend_internal ();
4490 } else if (thread->thread_interrupt_requested) {
4492 thread->thread_interrupt_requested = FALSE;
4493 UNLOCK_THREAD (thread);
4495 return(mono_get_exception_thread_interrupted ());
4498 UNLOCK_THREAD (thread);
4504 * mono_thread_request_interruption
4506 * A signal handler can call this method to request the interruption of a
4507 * thread. The result of the interruption will depend on the current state of
4508 * the thread. If the result is an exception that needs to be throw, it is
4509 * provided as return value.
4512 mono_thread_request_interruption (gboolean running_managed)
4514 MonoInternalThread *thread = mono_thread_internal_current ();
4516 /* The thread may already be stopping */
4520 if (!mono_thread_set_interruption_requested (thread))
4523 if (!running_managed || is_running_protected_wrapper ()) {
4524 /* Can't stop while in unmanaged code. Increase the global interruption
4525 request count. When exiting the unmanaged method the count will be
4526 checked and the thread will be interrupted. */
4528 /* this will awake the thread if it is in WaitForSingleObject
4530 /* Our implementation of this function ignores the func argument */
4532 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4534 mono_thread_info_self_interrupt ();
4539 return mono_thread_execute_interruption ();
4543 /*This function should be called by a thread after it has exited all of
4544 * its handle blocks at interruption time.*/
4546 mono_thread_resume_interruption (gboolean exec)
4548 MonoInternalThread *thread = mono_thread_internal_current ();
4549 gboolean still_aborting;
4551 /* The thread may already be stopping */
4555 LOCK_THREAD (thread);
4556 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4557 UNLOCK_THREAD (thread);
4559 /*This can happen if the protected block called Thread::ResetAbort*/
4560 if (!still_aborting)
4563 if (!mono_thread_set_interruption_requested (thread))
4566 mono_thread_info_self_interrupt ();
4569 return mono_thread_execute_interruption ();
4574 gboolean mono_thread_interruption_requested ()
4576 if (thread_interruption_requested) {
4577 MonoInternalThread *thread = mono_thread_internal_current ();
4578 /* The thread may already be stopping */
4580 return mono_thread_get_interruption_requested (thread);
4585 static MonoException*
4586 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4588 MonoInternalThread *thread = mono_thread_internal_current ();
4590 /* The thread may already be stopping */
4593 if (!mono_thread_get_interruption_requested (thread))
4595 if (!bypass_abort_protection && is_running_protected_wrapper ())
4598 return mono_thread_execute_interruption ();
4602 * Performs the interruption of the current thread, if one has been requested,
4603 * and the thread is not running a protected wrapper.
4604 * Return the exception which needs to be thrown, if any.
4607 mono_thread_interruption_checkpoint (void)
4609 return mono_thread_interruption_checkpoint_request (FALSE);
4613 * Performs the interruption of the current thread, if one has been requested.
4614 * Return the exception which needs to be thrown, if any.
4617 mono_thread_force_interruption_checkpoint_noraise (void)
4619 return mono_thread_interruption_checkpoint_request (TRUE);
4623 * mono_set_pending_exception:
4625 * Set the pending exception of the current thread to EXC.
4626 * The exception will be thrown when execution returns to managed code.
4629 mono_set_pending_exception (MonoException *exc)
4631 MonoThread *thread = mono_thread_current ();
4633 /* The thread may already be stopping */
4637 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4639 mono_thread_request_interruption (FALSE);
4643 * mono_thread_interruption_request_flag:
4645 * Returns the address of a flag that will be non-zero if an interruption has
4646 * been requested for a thread. The thread to interrupt may not be the current
4647 * thread, so an additional call to mono_thread_interruption_requested() or
4648 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4651 gint32* mono_thread_interruption_request_flag ()
4653 return &thread_interruption_requested;
4657 mono_thread_init_apartment_state (void)
4660 MonoInternalThread* thread = mono_thread_internal_current ();
4662 /* Positive return value indicates success, either
4663 * S_OK if this is first CoInitialize call, or
4664 * S_FALSE if CoInitialize already called, but with same
4665 * threading model. A negative value indicates failure,
4666 * probably due to trying to change the threading model.
4668 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4669 ? COINIT_APARTMENTTHREADED
4670 : COINIT_MULTITHREADED) < 0) {
4671 thread->apartment_state = ThreadApartmentState_Unknown;
4677 mono_thread_cleanup_apartment_state (void)
4680 MonoInternalThread* thread = mono_thread_internal_current ();
4682 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4689 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4691 LOCK_THREAD (thread);
4692 thread->state |= state;
4693 UNLOCK_THREAD (thread);
4697 * mono_thread_test_and_set_state:
4698 * Test if current state of \p thread include \p test. If it does not, OR \p set into the state.
4699 * \returns TRUE if \p set was OR'd in.
4702 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4704 LOCK_THREAD (thread);
4706 if ((thread->state & test) != 0) {
4707 UNLOCK_THREAD (thread);
4711 thread->state |= set;
4712 UNLOCK_THREAD (thread);
4718 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4720 LOCK_THREAD (thread);
4721 thread->state &= ~state;
4722 UNLOCK_THREAD (thread);
4726 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4728 gboolean ret = FALSE;
4730 LOCK_THREAD (thread);
4732 if ((thread->state & test) != 0) {
4736 UNLOCK_THREAD (thread);
4742 self_interrupt_thread (void *_unused)
4745 MonoThreadInfo *info;
4747 exc = mono_thread_execute_interruption ();
4749 if (mono_threads_is_coop_enabled ()) {
4750 /* We can return from an async call in coop, as
4751 * it's simply called when exiting the safepoint */
4755 g_error ("%s: we can't resume from an async call", __func__);
4758 info = mono_thread_info_current ();
4760 /* We must use _with_context since we didn't trampoline into the runtime */
4761 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. */
4765 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4769 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4773 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4775 MonoJitInfo **dest = (MonoJitInfo **)data;
4781 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4783 MonoJitInfo *ji = NULL;
4788 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4789 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4790 * where we hold runtime locks.
4792 if (!mono_threads_is_coop_enabled ())
4793 mono_thread_info_set_is_async_context (TRUE);
4794 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4795 if (!mono_threads_is_coop_enabled ())
4796 mono_thread_info_set_is_async_context (FALSE);
4801 MonoInternalThread *thread;
4802 gboolean install_async_abort;
4803 MonoThreadInfoInterruptToken *interrupt_token;
4806 static SuspendThreadResult
4807 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4809 AbortThreadData *data = (AbortThreadData *)ud;
4810 MonoInternalThread *thread = data->thread;
4811 MonoJitInfo *ji = NULL;
4812 gboolean protected_wrapper;
4813 gboolean running_managed;
4815 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4816 return MonoResumeThread;
4818 /*someone is already interrupting it*/
4819 if (!mono_thread_set_interruption_requested (thread))
4820 return MonoResumeThread;
4822 ji = mono_thread_info_get_last_managed (info);
4823 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4824 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4826 if (!protected_wrapper && running_managed) {
4827 /*We are in managed code*/
4828 /*Set the thread to call */
4829 if (data->install_async_abort)
4830 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4831 return MonoResumeThread;
4834 * This will cause waits to be broken.
4835 * It will also prevent the thread from entering a wait, so if the thread returns
4836 * from the wait before it receives the abort signal, it will just spin in the wait
4837 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4840 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4842 return MonoResumeThread;
4847 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4849 AbortThreadData data;
4851 g_assert (thread != mono_thread_internal_current ());
4853 data.thread = thread;
4854 data.install_async_abort = install_async_abort;
4855 data.interrupt_token = NULL;
4857 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4858 if (data.interrupt_token)
4859 mono_thread_info_finish_interrupt (data.interrupt_token);
4860 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4864 self_abort_internal (MonoError *error)
4870 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4871 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4874 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.
4876 exc = mono_thread_request_interruption (TRUE);
4878 mono_error_set_exception_instance (error, exc);
4880 mono_thread_info_self_interrupt ();
4884 MonoInternalThread *thread;
4886 MonoThreadInfoInterruptToken *interrupt_token;
4887 } SuspendThreadData;
4889 static SuspendThreadResult
4890 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4892 SuspendThreadData *data = (SuspendThreadData *)ud;
4893 MonoInternalThread *thread = data->thread;
4894 MonoJitInfo *ji = NULL;
4895 gboolean protected_wrapper;
4896 gboolean running_managed;
4898 ji = mono_thread_info_get_last_managed (info);
4899 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4900 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4902 if (running_managed && !protected_wrapper) {
4903 if (mono_threads_is_coop_enabled ()) {
4904 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4905 return MonoResumeThread;
4907 thread->state &= ~ThreadState_SuspendRequested;
4908 thread->state |= ThreadState_Suspended;
4909 return KeepSuspended;
4912 mono_thread_set_interruption_requested (thread);
4913 if (data->interrupt)
4914 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4916 return MonoResumeThread;
4920 /* LOCKING: called with @thread synch_cs held, and releases it */
4922 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4924 SuspendThreadData data;
4926 g_assert (thread != mono_thread_internal_current ());
4928 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4930 thread->self_suspended = FALSE;
4932 data.thread = thread;
4933 data.interrupt = interrupt;
4934 data.interrupt_token = NULL;
4936 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4937 if (data.interrupt_token)
4938 mono_thread_info_finish_interrupt (data.interrupt_token);
4940 UNLOCK_THREAD (thread);
4943 /* LOCKING: called with @thread synch_cs held, and releases it */
4945 self_suspend_internal (void)
4947 MonoInternalThread *thread;
4949 MonoOSEventWaitRet res;
4951 thread = mono_thread_internal_current ();
4953 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4955 thread->self_suspended = TRUE;
4957 thread->state &= ~ThreadState_SuspendRequested;
4958 thread->state |= ThreadState_Suspended;
4960 UNLOCK_THREAD (thread);
4962 event = thread->suspended;
4965 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4966 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4971 suspend_for_shutdown_async_call (gpointer unused)
4974 mono_thread_info_yield ();
4977 static SuspendThreadResult
4978 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4980 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4981 return MonoResumeThread;
4985 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4987 g_assert (thread != mono_thread_internal_current ());
4989 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4993 * mono_thread_is_foreign:
4994 * \param thread the thread to query
4996 * This function allows one to determine if a thread was created by the mono runtime and has
4997 * a well defined lifecycle or it's a foreign one, created by the native environment.
4999 * \returns TRUE if \p thread was not created by the runtime.
5002 mono_thread_is_foreign (MonoThread *thread)
5004 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
5005 return info->runtime_thread == FALSE;
5009 * mono_add_joinable_thread:
5011 * Add TID to the list of joinable threads.
5012 * LOCKING: Acquires the threads lock.
5015 mono_threads_add_joinable_thread (gpointer tid)
5019 * We cannot detach from threads because it causes problems like
5020 * 2fd16f60/r114307. So we collect them and join them when
5021 * we have time (in he finalizer thread).
5023 joinable_threads_lock ();
5024 if (!joinable_threads)
5025 joinable_threads = g_hash_table_new (NULL, NULL);
5026 g_hash_table_insert (joinable_threads, tid, tid);
5027 UnlockedIncrement (&joinable_thread_count);
5028 joinable_threads_unlock ();
5030 mono_gc_finalize_notify ();
5035 * mono_threads_join_threads:
5037 * Join all joinable threads. This is called from the finalizer thread.
5038 * LOCKING: Acquires the threads lock.
5041 mono_threads_join_threads (void)
5044 GHashTableIter iter;
5051 if (!UnlockedRead (&joinable_thread_count))
5055 joinable_threads_lock ();
5057 if (g_hash_table_size (joinable_threads)) {
5058 g_hash_table_iter_init (&iter, joinable_threads);
5059 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5060 thread = (pthread_t)tid;
5061 g_hash_table_remove (joinable_threads, key);
5062 UnlockedDecrement (&joinable_thread_count);
5065 joinable_threads_unlock ();
5067 if (thread != pthread_self ()) {
5069 /* This shouldn't block */
5070 mono_threads_join_lock ();
5071 mono_native_thread_join (thread);
5072 mono_threads_join_unlock ();
5085 * Wait for thread TID to exit.
5086 * LOCKING: Acquires the threads lock.
5089 mono_thread_join (gpointer tid)
5093 gboolean found = FALSE;
5095 joinable_threads_lock ();
5096 if (!joinable_threads)
5097 joinable_threads = g_hash_table_new (NULL, NULL);
5098 if (g_hash_table_lookup (joinable_threads, tid)) {
5099 g_hash_table_remove (joinable_threads, tid);
5100 UnlockedDecrement (&joinable_thread_count);
5103 joinable_threads_unlock ();
5106 thread = (pthread_t)tid;
5108 mono_native_thread_join (thread);
5114 mono_thread_internal_unhandled_exception (MonoObject* exc)
5116 MonoClass *klass = exc->vtable->klass;
5117 if (is_threadabort_exception (klass)) {
5118 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5119 } else if (!is_appdomainunloaded_exception (klass)
5120 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5121 mono_unhandled_exception (exc);
5122 if (mono_environment_exitcode_get () == 1) {
5123 mono_environment_exitcode_set (255);
5124 mono_invoke_unhandled_exception_hook (exc);
5125 g_assert_not_reached ();
5131 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5134 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5135 mono_error_set_pending_exception (&error);
5139 * mono_threads_attach_coop: called by native->managed wrappers
5142 * - blocking mode: contains gc unsafe transition cookie
5143 * - non-blocking mode: contains random data
5144 * - @return: the original domain which needs to be restored, or NULL.
5147 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5150 MonoThreadInfo *info;
5153 orig = mono_domain_get ();
5156 /* Happens when called from AOTed code which is only used in the root domain. */
5157 domain = mono_get_root_domain ();
5161 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5162 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5163 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5164 * we're only responsible for making the cookie. */
5165 if (mono_threads_is_blocking_transition_enabled ())
5166 external = !(info = mono_thread_info_current_unchecked ()) || !mono_thread_info_is_live (info);
5168 if (!mono_thread_internal_current ()) {
5169 mono_thread_attach_full (domain, FALSE);
5172 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5176 mono_domain_set (domain, TRUE);
5178 if (mono_threads_is_blocking_transition_enabled ()) {
5180 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5181 * return the right cookie. */
5182 *dummy = mono_threads_enter_gc_unsafe_region_cookie ();
5184 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5185 *dummy = mono_threads_enter_gc_unsafe_region (dummy);
5193 * mono_threads_detach_coop: called by native->managed wrappers
5195 * - @cookie: the original domain which needs to be restored, or NULL.
5197 * - blocking mode: contains gc unsafe transition cookie
5198 * - non-blocking mode: contains random data
5201 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5203 MonoDomain *domain, *orig;
5205 orig = (MonoDomain*) cookie;
5207 domain = mono_domain_get ();
5210 if (mono_threads_is_blocking_transition_enabled ()) {
5211 /* it won't do anything if cookie is NULL
5212 * thread state RUNNING -> (RUNNING|BLOCKING) */
5213 mono_threads_exit_gc_unsafe_region (*dummy, dummy);
5216 if (orig != domain) {
5218 mono_domain_unset ();
5220 mono_domain_set (orig, TRUE);
5225 /* Returns TRUE if the current thread is ready to be interrupted. */
5227 mono_threads_is_ready_to_be_interrupted (void)
5229 MonoInternalThread *thread;
5231 thread = mono_thread_internal_current ();
5232 LOCK_THREAD (thread);
5233 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5234 UNLOCK_THREAD (thread);
5238 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5239 UNLOCK_THREAD (thread);
5243 UNLOCK_THREAD (thread);
5249 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5251 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5253 if (internal->thread_info) {
5254 g_string_append (text, ", state : ");
5255 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5258 if (internal->owned_mutexes) {
5261 g_string_append (text, ", owns : [");
5262 for (i = 0; i < internal->owned_mutexes->len; i++)
5263 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5264 g_string_append (text, "]");
5269 mono_thread_internal_is_current (MonoInternalThread *internal)
5271 g_assert (internal);
5272 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));