3 * Thread support internal calls
6 * Dick Porter (dick@ximian.com)
7 * Paolo Molaro (lupus@ximian.com)
8 * Patrik Torstensson (patrik.torstensson@labs2.com)
10 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
11 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
12 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
13 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
21 #include <mono/metadata/object.h>
22 #include <mono/metadata/domain-internals.h>
23 #include <mono/metadata/profiler-private.h>
24 #include <mono/metadata/threads.h>
25 #include <mono/metadata/threads-types.h>
26 #include <mono/metadata/exception.h>
27 #include <mono/metadata/environment.h>
28 #include <mono/metadata/monitor.h>
29 #include <mono/metadata/gc-internals.h>
30 #include <mono/metadata/marshal.h>
31 #include <mono/metadata/runtime.h>
32 #include <mono/metadata/object-internals.h>
33 #include <mono/metadata/debug-internals.h>
34 #include <mono/utils/monobitset.h>
35 #include <mono/utils/mono-compiler.h>
36 #include <mono/utils/mono-mmap.h>
37 #include <mono/utils/mono-membar.h>
38 #include <mono/utils/mono-time.h>
39 #include <mono/utils/mono-threads.h>
40 #include <mono/utils/mono-threads-coop.h>
41 #include <mono/utils/hazard-pointer.h>
42 #include <mono/utils/mono-tls.h>
43 #include <mono/utils/atomic.h>
44 #include <mono/utils/mono-memory-model.h>
45 #include <mono/utils/mono-error-internals.h>
46 #include <mono/utils/os-event.h>
47 #include <mono/utils/mono-threads-debug.h>
48 #include <mono/utils/unlocked.h>
49 #include <mono/metadata/w32handle.h>
50 #include <mono/metadata/w32event.h>
51 #include <mono/metadata/w32mutex.h>
53 #include <mono/metadata/reflection-internals.h>
54 #include <mono/metadata/abi-details.h>
55 #include <mono/metadata/w32error.h>
56 #include <mono/utils/w32api.h>
62 #if defined(HOST_WIN32)
66 #if defined(HOST_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
67 #define USE_TKILL_ON_ANDROID 1
73 #ifdef USE_TKILL_ON_ANDROID
74 extern int tkill (pid_t tid, int signal);
78 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
79 #define THREAD_DEBUG(a)
80 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
81 #define THREAD_WAIT_DEBUG(a)
82 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
83 #define LIBGC_DEBUG(a)
85 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
86 #define SPIN_LOCK(i) do { \
87 if (SPIN_TRYLOCK (i)) \
91 #define SPIN_UNLOCK(i) i = 0
93 #define LOCK_THREAD(thread) lock_thread((thread))
94 #define UNLOCK_THREAD(thread) unlock_thread((thread))
106 typedef struct _StaticDataFreeList StaticDataFreeList;
107 struct _StaticDataFreeList {
108 StaticDataFreeList *next;
116 StaticDataFreeList *freelist;
119 /* Controls access to the 'threads' hash table */
120 static void mono_threads_lock (void);
121 static void mono_threads_unlock (void);
122 static MonoCoopMutex threads_mutex;
124 /* Controls access to the 'joinable_threads' hash table */
125 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
126 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
127 static mono_mutex_t joinable_threads_mutex;
129 /* Holds current status of static data heap */
130 static StaticDataInfo thread_static_info;
131 static StaticDataInfo context_static_info;
133 /* The hash of existing threads (key is thread ID, value is
134 * MonoInternalThread*) that need joining before exit
136 static MonoGHashTable *threads=NULL;
138 /* List of app context GC handles.
139 * Added to from mono_threads_register_app_context ().
141 static GHashTable *contexts = NULL;
143 /* Cleanup queue for contexts. */
144 static MonoReferenceQueue *context_queue;
147 * Threads which are starting up and they are not in the 'threads' hash yet.
148 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
149 * Protected by mono_threads_lock ().
151 static MonoGHashTable *threads_starting_up = NULL;
154 /* Protected by the threads lock */
155 static GHashTable *joinable_threads;
156 static gint32 joinable_thread_count;
158 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
159 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
161 /* function called at thread start */
162 static MonoThreadStartCB mono_thread_start_cb = NULL;
164 /* function called at thread attach */
165 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
167 /* function called at thread cleanup */
168 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
170 /* The default stack size for each thread */
171 static guint32 default_stacksize = 0;
172 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
174 static void context_adjust_static_data (MonoAppContext *ctx);
175 static void mono_free_static_data (gpointer* static_data);
176 static void mono_init_static_data_info (StaticDataInfo *static_data);
177 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
178 static gboolean mono_thread_resume (MonoInternalThread* thread);
179 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
180 static void self_abort_internal (MonoError *error);
181 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
182 static void self_suspend_internal (void);
184 static MonoException* mono_thread_execute_interruption (void);
185 static void ref_stack_destroy (gpointer rs);
187 /* Spin lock for InterlockedXXX 64 bit functions */
188 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
189 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
190 static mono_mutex_t interlocked_mutex;
192 /* global count of thread interruptions requested */
193 static gint32 thread_interruption_requested = 0;
195 /* Event signaled when a thread changes its background mode */
196 static MonoOSEvent background_change_event;
198 static gboolean shutting_down = FALSE;
200 static gint32 managed_thread_id_counter = 0;
202 /* Class lazy loading functions */
203 static GENERATE_GET_CLASS_WITH_CACHE (appdomain_unloaded_exception, "System", "AppDomainUnloadedException")
206 mono_threads_lock (void)
208 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
212 mono_threads_unlock (void)
214 mono_locks_coop_release (&threads_mutex, ThreadsLock);
219 get_next_managed_thread_id (void)
221 return InterlockedIncrement (&managed_thread_id_counter);
225 * We separate interruptions/exceptions into either sync (they can be processed anytime,
226 * normally as soon as they are set, and are set by the same thread) and async (they can't
227 * be processed inside abort protected blocks and are normally set by other threads). We
228 * can have both a pending sync and async interruption. In this case, the sync exception is
229 * processed first. Since we clean sync flag first, mono_thread_execute_interruption must
230 * also handle all sync type exceptions before the async type exceptions.
233 INTERRUPT_SYNC_REQUESTED_BIT = 0x1,
234 INTERRUPT_ASYNC_REQUESTED_BIT = 0x2,
235 INTERRUPT_REQUESTED_MASK = 0x3,
236 ABORT_PROT_BLOCK_SHIFT = 2,
237 ABORT_PROT_BLOCK_BITS = 8,
238 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
242 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
244 gsize state = thread->thread_state;
245 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
249 mono_threads_begin_abort_protected_block (void)
251 MonoInternalThread *thread = mono_thread_internal_current ();
252 gsize old_state, new_state;
255 old_state = thread->thread_state;
257 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
258 //bounds check abort_prot_count
259 g_assert (new_val > 0);
260 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
262 new_state = old_state + (1 << ABORT_PROT_BLOCK_SHIFT);
263 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
265 /* Defer async request since we won't be able to process until exiting the block */
266 if (new_val == 1 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
267 InterlockedDecrement (&thread_interruption_requested);
268 THREADS_INTERRUPT_DEBUG ("[%d] begin abort protected block old_state %ld new_state %ld, defer tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
269 if (thread_interruption_requested < 0)
270 g_warning ("bad thread_interruption_requested state");
272 THREADS_INTERRUPT_DEBUG ("[%d] begin abort protected block old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
277 mono_thread_state_has_interruption (gsize state)
279 /* pending exception, self abort */
280 if (state & INTERRUPT_SYNC_REQUESTED_BIT)
283 /* abort, interruption, suspend */
284 if ((state & INTERRUPT_ASYNC_REQUESTED_BIT) && !(state & ABORT_PROT_BLOCK_MASK))
291 mono_threads_end_abort_protected_block (void)
293 MonoInternalThread *thread = mono_thread_internal_current ();
294 gsize old_state, new_state;
297 old_state = thread->thread_state;
299 //bounds check abort_prot_count
300 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
301 g_assert (new_val >= 0);
302 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
304 new_state = old_state - (1 << ABORT_PROT_BLOCK_SHIFT);
305 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
307 if (new_val == 0 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
308 InterlockedIncrement (&thread_interruption_requested);
309 THREADS_INTERRUPT_DEBUG ("[%d] end abort protected block old_state %ld new_state %ld, restore tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
311 THREADS_INTERRUPT_DEBUG ("[%d] end abort protected block old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
314 return mono_thread_state_has_interruption (new_state);
318 mono_thread_get_interruption_requested (MonoInternalThread *thread)
320 gsize state = thread->thread_state;
322 return mono_thread_state_has_interruption (state);
326 * Returns TRUE is there was a state change
327 * We clear a single interruption request, sync has priority.
330 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
332 gsize old_state, new_state;
334 old_state = thread->thread_state;
336 // no interruption to process
337 if (!(old_state & INTERRUPT_SYNC_REQUESTED_BIT) &&
338 (!(old_state & INTERRUPT_ASYNC_REQUESTED_BIT) || (old_state & ABORT_PROT_BLOCK_MASK)))
341 if (old_state & INTERRUPT_SYNC_REQUESTED_BIT)
342 new_state = old_state & ~INTERRUPT_SYNC_REQUESTED_BIT;
344 new_state = old_state & ~INTERRUPT_ASYNC_REQUESTED_BIT;
345 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
347 InterlockedDecrement (&thread_interruption_requested);
348 THREADS_INTERRUPT_DEBUG ("[%d] clear interruption old_state %ld new_state %ld, tir %d\n", thread->small_id, old_state, new_state, thread_interruption_requested);
349 if (thread_interruption_requested < 0)
350 g_warning ("bad thread_interruption_requested state");
354 /* Returns TRUE is there was a state change and the interruption can be processed */
356 mono_thread_set_interruption_requested (MonoInternalThread *thread)
358 //always force when the current thread is doing it to itself.
359 gboolean sync = thread == mono_thread_internal_current ();
360 gsize old_state, new_state;
362 old_state = thread->thread_state;
365 if ((sync && (old_state & INTERRUPT_SYNC_REQUESTED_BIT)) ||
366 (!sync && (old_state & INTERRUPT_ASYNC_REQUESTED_BIT)))
370 new_state = old_state | INTERRUPT_SYNC_REQUESTED_BIT;
372 new_state = old_state | INTERRUPT_ASYNC_REQUESTED_BIT;
373 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
375 if (sync || !(new_state & ABORT_PROT_BLOCK_MASK)) {
376 InterlockedIncrement (&thread_interruption_requested);
377 THREADS_INTERRUPT_DEBUG ("[%d] set interruption on [%d] old_state %ld new_state %ld, tir %d\n", mono_thread_internal_current ()->small_id, thread->small_id, old_state, new_state, thread_interruption_requested);
379 THREADS_INTERRUPT_DEBUG ("[%d] set interruption on [%d] old_state %ld new_state %ld, tir deferred %d\n", mono_thread_internal_current ()->small_id, thread->small_id, old_state, new_state, thread_interruption_requested);
382 return sync || !(new_state & ABORT_PROT_BLOCK_MASK);
385 static inline MonoNativeThreadId
386 thread_get_tid (MonoInternalThread *thread)
388 /* We store the tid as a guint64 to keep the object layout constant between platforms */
389 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
392 static void ensure_synch_cs_set (MonoInternalThread *thread)
394 MonoCoopMutex *synch_cs;
396 if (thread->synch_cs != NULL) {
400 synch_cs = g_new0 (MonoCoopMutex, 1);
401 mono_coop_mutex_init_recursive (synch_cs);
403 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
404 synch_cs, NULL) != NULL) {
405 /* Another thread must have installed this CS */
406 mono_coop_mutex_destroy (synch_cs);
412 lock_thread (MonoInternalThread *thread)
414 if (!thread->synch_cs)
415 ensure_synch_cs_set (thread);
417 g_assert (thread->synch_cs);
419 mono_coop_mutex_lock (thread->synch_cs);
423 unlock_thread (MonoInternalThread *thread)
425 mono_coop_mutex_unlock (thread->synch_cs);
428 static inline gboolean
429 is_appdomainunloaded_exception (MonoClass *klass)
431 return klass == mono_class_get_appdomain_unloaded_exception_class ();
434 static inline gboolean
435 is_threadabort_exception (MonoClass *klass)
437 return klass == mono_defaults.threadabortexception_class;
441 * A special static data offset (guint32) consists of 3 parts:
443 * [0] 6-bit index into the array of chunks.
444 * [6] 25-bit offset into the array.
445 * [31] Bit indicating thread or context static.
450 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
461 } SpecialStaticOffset;
463 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
464 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
466 #define MAKE_SPECIAL_STATIC_OFFSET(idx, off, ty) \
467 ((SpecialStaticOffset) { .fields = { .index = (idx), .offset = (off), .type = (ty) } }.raw)
468 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
469 (((SpecialStaticOffset *) &(x))->fields.f)
472 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
474 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
476 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
477 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
479 return ((char *) thread->static_data [idx]) + off;
483 get_context_static_data (MonoAppContext *ctx, guint32 offset)
485 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
487 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
488 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
490 return ((char *) ctx->static_data [idx]) + off;
494 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
496 static MonoClassField *current_thread_field = NULL;
500 if (!current_thread_field) {
501 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
502 g_assert (current_thread_field);
505 mono_class_vtable (domain, mono_defaults.thread_class);
506 mono_domain_lock (domain);
507 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
508 mono_domain_unlock (domain);
511 return (MonoThread **)get_thread_static_data (thread, offset);
515 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
517 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
519 g_assert (current->obj.vtable->domain == domain);
521 g_assert (!*current_thread_ptr);
522 *current_thread_ptr = current;
526 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
532 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
535 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
536 /* only possible failure mode is OOM, from which we don't expect to recover. */
537 mono_error_assert_ok (&error);
539 MONO_OBJECT_SETREF (thread, internal_thread, internal);
544 static MonoInternalThread*
545 create_internal_thread_object (void)
548 MonoInternalThread *thread;
551 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
552 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
553 /* only possible failure mode is OOM, from which we don't exect to recover */
554 mono_error_assert_ok (&error);
556 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
557 mono_coop_mutex_init_recursive (thread->synch_cs);
559 thread->apartment_state = ThreadApartmentState_Unknown;
560 thread->managed_id = get_next_managed_thread_id ();
561 if (mono_gc_is_moving ()) {
562 thread->thread_pinning_ref = thread;
563 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
566 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
568 thread->suspended = g_new0 (MonoOSEvent, 1);
569 mono_os_event_init (thread->suspended, TRUE);
575 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
579 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
580 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
581 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
586 g_assert (internal->native_handle);
588 res = SetThreadPriority (internal->native_handle, priority - 2);
590 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
591 #else /* HOST_WIN32 */
594 struct sched_param param;
597 tid = thread_get_tid (internal);
599 res = pthread_getschedparam (tid, &policy, ¶m);
601 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
603 #ifdef _POSIX_PRIORITY_SCHEDULING
606 /* Necessary to get valid priority range */
608 min = sched_get_priority_min (policy);
609 max = sched_get_priority_max (policy);
611 if (max > 0 && min >= 0 && max > min) {
612 double srange, drange, sposition, dposition;
613 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
615 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
616 dposition = (sposition / srange) * drange;
617 param.sched_priority = (int)(dposition + min);
624 param.sched_priority = 50;
630 param.sched_priority = 0;
633 g_warning ("%s: unknown policy %d", __func__, policy);
638 res = pthread_setschedparam (tid, policy, ¶m);
641 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
644 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
646 #endif /* HOST_WIN32 */
650 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
653 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain)
655 MonoThreadInfo *info;
656 MonoInternalThread *internal;
657 MonoDomain *domain, *root_domain;
661 info = mono_thread_info_current ();
664 internal = thread->internal_thread;
667 /* It is needed to store the MonoInternalThread on the MonoThreadInfo, because of the following case:
668 * - the MonoInternalThread TLS key is destroyed: set it to NULL
669 * - the MonoThreadInfo TLS key is destroyed: calls mono_thread_info_detach
670 * - it calls MonoThreadInfoCallbacks.thread_detach
671 * - mono_thread_internal_current returns NULL -> fails to detach the MonoInternalThread. */
672 mono_thread_info_set_internal_thread_gchandle (info, mono_gchandle_new ((MonoObject*) internal, FALSE));
674 internal->handle = mono_threads_open_thread_handle (info->handle);
676 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
678 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
679 internal->thread_info = info;
680 internal->small_id = info->small_id;
682 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
684 SET_CURRENT_OBJECT (internal);
686 domain = mono_object_domain (thread);
688 mono_thread_push_appdomain_ref (domain);
689 if (!mono_domain_set (domain, force_domain)) {
690 mono_thread_pop_appdomain_ref ();
694 mono_threads_lock ();
696 if (threads_starting_up)
697 mono_g_hash_table_remove (threads_starting_up, thread);
699 if (shutting_down && !force_attach) {
700 mono_threads_unlock ();
701 mono_thread_pop_appdomain_ref ();
706 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
709 /* We don't need to duplicate thread->handle, because it is
710 * only closed when the thread object is finalized by the GC. */
711 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
713 /* We have to do this here because mono_thread_start_cb
714 * requires that root_domain_thread is set up. */
715 if (thread_static_info.offset || thread_static_info.idx > 0) {
716 /* get the current allocated size */
717 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
718 mono_alloc_static_data (&internal->static_data, offset, TRUE);
721 mono_threads_unlock ();
723 root_domain = mono_get_root_domain ();
725 g_assert (!internal->root_domain_thread);
726 if (domain != root_domain)
727 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
729 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
731 if (domain != root_domain)
732 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
734 set_current_thread_for_domain (domain, internal, thread);
736 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
742 mono_thread_detach_internal (MonoInternalThread *thread)
746 g_assert (thread != NULL);
747 SET_CURRENT_OBJECT (thread);
749 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
752 mono_w32mutex_abandon ();
755 if (thread->abort_state_handle) {
756 mono_gchandle_free (thread->abort_state_handle);
757 thread->abort_state_handle = 0;
760 thread->abort_exc = NULL;
761 thread->current_appcontext = NULL;
764 * thread->synch_cs can be NULL if this was called after
765 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
766 * This can happen only during shutdown.
767 * The shutting_down flag is not always set, so we can't assert on it.
769 if (thread->synch_cs)
770 LOCK_THREAD (thread);
772 thread->state |= ThreadState_Stopped;
773 thread->state &= ~ThreadState_Background;
775 if (thread->synch_cs)
776 UNLOCK_THREAD (thread);
779 An interruption request has leaked to cleanup. Adjust the global counter.
781 This can happen is the abort source thread finds the abortee (this) thread
782 in unmanaged code. If this thread never trips back to managed code or check
783 the local flag it will be left set and positively unbalance the global counter.
785 Leaving the counter unbalanced will cause a performance degradation since all threads
786 will now keep checking their local flags all the time.
788 mono_thread_clear_interruption_requested (thread);
790 mono_threads_lock ();
794 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
795 /* We have to check whether the thread object for the
796 * tid is still the same in the table because the
797 * thread might have been destroyed and the tid reused
798 * in the meantime, in which case the tid would be in
799 * the table, but with another thread object.
803 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
807 mono_threads_unlock ();
809 /* Don't close the handle here, wait for the object finalizer
810 * to do it. Otherwise, the following race condition applies:
812 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
814 * 2) Some other handle is reassigned the same slot
816 * 3) Another thread tries to join the first thread, and
817 * blocks waiting for the reassigned handle to be signalled
818 * (which might never happen). This is possible, because the
819 * thread calling Join() still has a reference to the first
823 /* if the thread is not in the hash it has been removed already */
825 mono_domain_unset ();
826 mono_memory_barrier ();
828 if (mono_thread_cleanup_fn)
829 mono_thread_cleanup_fn (thread_get_tid (thread));
834 mono_release_type_locks (thread);
836 /* Can happen when we attach the profiler helper thread in order to heapshot. */
837 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
838 MONO_PROFILER_RAISE (thread_stopped, (thread->tid));
840 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
843 * This will signal async signal handlers that the thread has exited.
844 * The profiler callback needs this to be set, so it cannot be done earlier.
846 mono_domain_unset ();
847 mono_memory_barrier ();
849 if (thread == mono_thread_internal_current ())
850 mono_thread_pop_appdomain_ref ();
852 mono_free_static_data (thread->static_data);
853 thread->static_data = NULL;
854 ref_stack_destroy (thread->appdomain_refs);
855 thread->appdomain_refs = NULL;
857 g_assert (thread->suspended);
858 mono_os_event_destroy (thread->suspended);
859 g_free (thread->suspended);
860 thread->suspended = NULL;
862 if (mono_thread_cleanup_fn)
863 mono_thread_cleanup_fn (thread_get_tid (thread));
865 mono_memory_barrier ();
867 if (mono_gc_is_moving ()) {
868 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
869 thread->thread_pinning_ref = NULL;
873 SET_CURRENT_OBJECT (NULL);
874 mono_domain_unset ();
876 mono_thread_info_unset_internal_thread_gchandle ((MonoThreadInfo*) thread->thread_info);
878 /* Don't need to close the handle to this thread, even though we took a
879 * reference in mono_thread_attach (), because the GC will do it
880 * when the Thread object is finalised.
887 MonoObject *start_delegate;
888 MonoObject *start_delegate_arg;
889 MonoThreadStart start_func;
890 gpointer start_func_arg;
891 gboolean force_attach;
893 MonoCoopSem registered;
896 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
899 MonoThreadStart start_func;
900 void *start_func_arg;
903 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
907 MonoInternalThread *internal;
908 MonoObject *start_delegate;
909 MonoObject *start_delegate_arg;
912 thread = start_info->thread;
913 internal = thread->internal_thread;
914 domain = mono_object_domain (start_info->thread);
916 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
918 if (!mono_thread_attach_internal (thread, start_info->force_attach, FALSE)) {
919 start_info->failed = TRUE;
921 mono_coop_sem_post (&start_info->registered);
923 if (InterlockedDecrement (&start_info->ref) == 0) {
924 mono_coop_sem_destroy (&start_info->registered);
931 mono_thread_internal_set_priority (internal, internal->priority);
935 start_delegate = start_info->start_delegate;
936 start_delegate_arg = start_info->start_delegate_arg;
937 start_func = start_info->start_func;
938 start_func_arg = start_info->start_func_arg;
940 /* This MUST be called before any managed code can be
941 * executed, as it calls the callback function that (for the
942 * jit) sets the lmf marker.
945 if (mono_thread_start_cb)
946 mono_thread_start_cb (tid, stack_ptr, start_func);
948 /* On 2.0 profile (and higher), set explicitly since state might have been
950 if (internal->apartment_state == ThreadApartmentState_Unknown)
951 internal->apartment_state = ThreadApartmentState_MTA;
953 mono_thread_init_apartment_state ();
955 /* Let the thread that called Start() know we're ready */
956 mono_coop_sem_post (&start_info->registered);
958 if (InterlockedDecrement (&start_info->ref) == 0) {
959 mono_coop_sem_destroy (&start_info->registered);
963 /* start_info is not valid anymore */
967 * Call this after calling start_notify, since the profiler callback might want
968 * to lock the thread, and the lock is held by thread_start () which waits for
971 MONO_PROFILER_RAISE (thread_started, (tid));
973 /* if the name was set before starting, we didn't invoke the profiler callback */
974 if (internal->name) {
975 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
976 MONO_PROFILER_RAISE (thread_name, (internal->tid, tname));
977 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
981 /* start_func is set only for unmanaged start functions */
983 start_func (start_func_arg);
987 g_assert (start_delegate != NULL);
989 /* we may want to handle the exception here. See comment below on unhandled exceptions */
990 args [0] = (gpointer) start_delegate_arg;
991 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
993 if (!mono_error_ok (&error)) {
994 MonoException *ex = mono_error_convert_to_exception (&error);
996 g_assert (ex != NULL);
997 MonoClass *klass = mono_object_get_class (&ex->object);
998 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
999 !is_threadabort_exception (klass)) {
1000 mono_unhandled_exception (&ex->object);
1001 mono_invoke_unhandled_exception_hook (&ex->object);
1002 g_assert_not_reached ();
1005 mono_error_cleanup (&error);
1009 /* If the thread calls ExitThread at all, this remaining code
1010 * will not be executed, but the main thread will eventually
1011 * call mono_thread_detach_internal() on this thread's behalf.
1014 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
1016 /* Do any cleanup needed for apartment state. This
1017 * cannot be done in mono_thread_detach_internal since
1018 * mono_thread_detach_internal could be called for a
1019 * thread other than the current thread.
1020 * mono_thread_cleanup_apartment_state cleans up apartment
1021 * for the current thead */
1022 mono_thread_cleanup_apartment_state ();
1024 mono_thread_detach_internal (internal);
1032 start_wrapper (gpointer data)
1034 StartInfo *start_info;
1035 MonoThreadInfo *info;
1038 start_info = (StartInfo*) data;
1039 g_assert (start_info);
1041 info = mono_thread_info_attach ();
1042 info->runtime_thread = TRUE;
1044 /* Run the actual main function of the thread */
1045 res = start_wrapper_internal (start_info, info->stack_end);
1047 mono_thread_info_exit (res);
1049 g_assert_not_reached ();
1055 * Common thread creation code.
1056 * LOCKING: Acquires the threads lock.
1059 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
1060 MonoThreadCreateFlags flags, MonoError *error)
1062 StartInfo *start_info = NULL;
1063 MonoNativeThreadId tid;
1065 gsize stack_set_size;
1068 g_assert (!start_func && !start_func_arg);
1070 g_assert (!start_delegate);
1072 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
1073 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
1074 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1076 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
1077 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
1078 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1082 * Join joinable threads to prevent running out of threads since the finalizer
1083 * thread might be blocked/backlogged.
1085 mono_threads_join_threads ();
1089 mono_threads_lock ();
1090 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
1091 mono_threads_unlock ();
1094 if (threads_starting_up == NULL) {
1095 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
1097 mono_g_hash_table_insert (threads_starting_up, thread, thread);
1098 mono_threads_unlock ();
1100 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
1101 if (internal->threadpool_thread)
1102 mono_thread_set_state (internal, ThreadState_Background);
1104 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
1106 start_info = g_new0 (StartInfo, 1);
1107 start_info->ref = 2;
1108 start_info->thread = thread;
1109 start_info->start_delegate = start_delegate;
1110 start_info->start_delegate_arg = thread->start_obj;
1111 start_info->start_func = start_func;
1112 start_info->start_func_arg = start_func_arg;
1113 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
1114 start_info->failed = FALSE;
1115 mono_coop_sem_init (&start_info->registered, 0);
1117 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
1118 stack_set_size = default_stacksize_for_thread (internal);
1122 if (!mono_thread_platform_create_thread (start_wrapper, start_info, &stack_set_size, &tid)) {
1123 /* The thread couldn't be created, so set an exception */
1124 mono_threads_lock ();
1125 mono_g_hash_table_remove (threads_starting_up, thread);
1126 mono_threads_unlock ();
1127 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
1128 /* ref is not going to be decremented in start_wrapper_internal */
1129 InterlockedDecrement (&start_info->ref);
1134 internal->stack_size = (int) stack_set_size;
1136 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
1139 * Wait for the thread to set up its TLS data etc, so
1140 * theres no potential race condition if someone tries
1141 * to look up the data believing the thread has
1145 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
1147 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Done launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
1149 ret = !start_info->failed;
1152 if (InterlockedDecrement (&start_info->ref) == 0) {
1153 mono_coop_sem_destroy (&start_info->registered);
1154 g_free (start_info);
1161 * mono_thread_new_init:
1164 mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1166 if (mono_thread_start_cb) {
1167 mono_thread_start_cb (tid, stack_start, func);
1172 * mono_threads_set_default_stacksize:
1175 mono_threads_set_default_stacksize (guint32 stacksize)
1177 default_stacksize = stacksize;
1181 * mono_threads_get_default_stacksize:
1184 mono_threads_get_default_stacksize (void)
1186 return default_stacksize;
1190 * mono_thread_create_internal:
1192 * ARG should not be a GC reference.
1195 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1198 MonoInternalThread *internal;
1203 internal = create_internal_thread_object ();
1205 thread = create_thread_object (domain, internal);
1207 LOCK_THREAD (internal);
1209 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1211 UNLOCK_THREAD (internal);
1213 return_val_if_nok (error, NULL);
1218 * mono_thread_create:
1221 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1224 if (!mono_thread_create_checked (domain, func, arg, &error))
1225 mono_error_cleanup (&error);
1229 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1231 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1235 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1237 MonoInternalThread *internal;
1239 MonoThreadInfo *info;
1240 MonoNativeThreadId tid;
1242 if (mono_thread_internal_current_is_attached ()) {
1243 if (domain != mono_domain_get ())
1244 mono_domain_set (domain, TRUE);
1245 /* Already attached */
1246 return mono_thread_current ();
1249 info = mono_thread_info_attach ();
1252 tid=mono_native_thread_id_get ();
1254 internal = create_internal_thread_object ();
1256 thread = create_thread_object (domain, internal);
1258 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1259 /* Mono is shutting down, so just wait for the end */
1261 mono_thread_info_sleep (10000, NULL);
1264 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1266 if (mono_thread_attach_cb)
1267 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), info->stack_end);
1269 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1270 if (!mono_thread_info_current ()->tools_thread)
1271 MONO_PROFILER_RAISE (thread_started, (MONO_NATIVE_THREAD_ID_TO_UINT (tid)));
1277 * mono_thread_attach:
1280 mono_thread_attach (MonoDomain *domain)
1282 return mono_thread_attach_full (domain, FALSE);
1286 * mono_thread_detach:
1289 mono_thread_detach (MonoThread *thread)
1292 mono_thread_detach_internal (thread->internal_thread);
1296 * mono_thread_detach_if_exiting:
1298 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1299 * This should be used at the end of embedding code which calls into managed code, and which
1300 * can be called from pthread dtors, like <code>dealloc:</code> implementations in Objective-C.
1303 mono_thread_detach_if_exiting (void)
1305 if (mono_thread_info_is_exiting ()) {
1306 MonoInternalThread *thread;
1308 thread = mono_thread_internal_current ();
1310 mono_thread_detach_internal (thread);
1311 mono_thread_info_detach ();
1319 mono_thread_internal_current_is_attached (void)
1321 MonoInternalThread *internal;
1323 internal = GET_CURRENT_OBJECT ();
1334 mono_thread_exit (void)
1336 MonoInternalThread *thread = mono_thread_internal_current ();
1338 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1340 mono_thread_detach_internal (thread);
1342 /* we could add a callback here for embedders to use. */
1343 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1344 exit (mono_environment_exitcode_get ());
1346 mono_thread_info_exit (0);
1350 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1352 MonoInternalThread *internal;
1354 internal = create_internal_thread_object ();
1356 internal->state = ThreadState_Unstarted;
1358 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1362 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1364 return mono_thread_current ();
1368 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1372 MonoInternalThread *internal;
1375 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1377 if (!this_obj->internal_thread)
1378 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1379 internal = this_obj->internal_thread;
1381 LOCK_THREAD (internal);
1383 if ((internal->state & ThreadState_Unstarted) == 0) {
1384 UNLOCK_THREAD (internal);
1385 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1389 if ((internal->state & ThreadState_Aborted) != 0) {
1390 UNLOCK_THREAD (internal);
1394 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1396 mono_error_cleanup (&error);
1397 UNLOCK_THREAD (internal);
1401 internal->state &= ~ThreadState_Unstarted;
1403 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1405 UNLOCK_THREAD (internal);
1406 return internal->handle;
1410 * This is called from the finalizer of the internal thread object.
1413 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1415 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1418 * Since threads keep a reference to their thread object while running, by
1419 * the time this function is called, the thread has already exited/detached,
1420 * i.e. mono_thread_detach_internal () has ran. The exception is during
1421 * shutdown, when mono_thread_detach_internal () can be called after this.
1423 if (this_obj->handle) {
1424 mono_threads_close_thread_handle (this_obj->handle);
1425 this_obj->handle = NULL;
1429 CloseHandle (this_obj->native_handle);
1432 if (this_obj->synch_cs) {
1433 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1434 this_obj->synch_cs = NULL;
1435 mono_coop_mutex_destroy (synch_cs);
1439 if (this_obj->name) {
1440 void *name = this_obj->name;
1441 this_obj->name = NULL;
1447 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1450 MonoInternalThread *thread = mono_thread_internal_current ();
1452 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1454 if (mono_thread_current_check_pending_interrupt ())
1458 gboolean alerted = FALSE;
1460 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1462 res = mono_thread_info_sleep (ms, &alerted);
1464 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1467 MonoException* exc = mono_thread_execute_interruption ();
1469 mono_raise_exception (exc);
1471 // FIXME: !MONO_INFINITE_WAIT
1472 if (ms != MONO_INFINITE_WAIT)
1481 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1486 ves_icall_System_Threading_Thread_GetDomainID (void)
1488 return mono_domain_get()->domain_id;
1492 ves_icall_System_Threading_Thread_Yield (void)
1494 return mono_thread_info_yield ();
1498 * mono_thread_get_name:
1500 * Return the name of the thread. NAME_LEN is set to the length of the name.
1501 * Return NULL if the thread has no name. The returned memory is owned by the
1505 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1509 LOCK_THREAD (this_obj);
1511 if (!this_obj->name) {
1515 *name_len = this_obj->name_len;
1516 res = g_new (gunichar2, this_obj->name_len);
1517 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1520 UNLOCK_THREAD (this_obj);
1526 * mono_thread_get_name_utf8:
1527 * \returns the name of the thread in UTF-8.
1528 * Return NULL if the thread has no name.
1529 * The returned memory is owned by the caller.
1532 mono_thread_get_name_utf8 (MonoThread *thread)
1537 MonoInternalThread *internal = thread->internal_thread;
1538 if (internal == NULL)
1541 LOCK_THREAD (internal);
1543 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1545 UNLOCK_THREAD (internal);
1551 * mono_thread_get_managed_id:
1552 * \returns the \c Thread.ManagedThreadId value of \p thread.
1553 * Returns \c -1 if \p thread is NULL.
1556 mono_thread_get_managed_id (MonoThread *thread)
1561 MonoInternalThread *internal = thread->internal_thread;
1562 if (internal == NULL)
1565 int32_t id = internal->managed_id;
1571 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1576 error_init (&error);
1578 LOCK_THREAD (this_obj);
1580 if (!this_obj->name)
1583 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1585 UNLOCK_THREAD (this_obj);
1587 if (mono_error_set_pending_exception (&error))
1594 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1596 LOCK_THREAD (this_obj);
1601 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1602 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1603 UNLOCK_THREAD (this_obj);
1605 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1608 if (this_obj->name) {
1609 g_free (this_obj->name);
1610 this_obj->name_len = 0;
1613 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1614 this_obj->name_len = mono_string_length (name);
1617 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1620 this_obj->name = NULL;
1623 UNLOCK_THREAD (this_obj);
1625 if (this_obj->name && this_obj->tid) {
1626 char *tname = mono_string_to_utf8_checked (name, error);
1627 return_if_nok (error);
1628 MONO_PROFILER_RAISE (thread_name, (this_obj->tid, tname));
1629 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1635 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1638 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1639 mono_error_set_pending_exception (&error);
1643 * ves_icall_System_Threading_Thread_GetPriority_internal:
1644 * @param this_obj: The MonoInternalThread on which to operate.
1646 * Gets the priority of the given thread.
1647 * @return: The priority of the given thread.
1650 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1653 MonoInternalThread *internal = this_obj->internal_thread;
1655 LOCK_THREAD (internal);
1656 priority = internal->priority;
1657 UNLOCK_THREAD (internal);
1663 * ves_icall_System_Threading_Thread_SetPriority_internal:
1664 * @param this_obj: The MonoInternalThread on which to operate.
1665 * @param priority: The priority to set.
1667 * Sets the priority of the given thread.
1670 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1672 MonoInternalThread *internal = this_obj->internal_thread;
1674 LOCK_THREAD (internal);
1675 internal->priority = priority;
1676 if (internal->thread_info != NULL)
1677 mono_thread_internal_set_priority (internal, priority);
1678 UNLOCK_THREAD (internal);
1681 /* If the array is already in the requested domain, we just return it,
1682 otherwise we return a copy in that domain. */
1684 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1692 if (mono_object_domain (arr) == domain)
1695 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1696 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1701 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1704 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1705 mono_error_set_pending_exception (&error);
1710 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1713 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1714 mono_error_set_pending_exception (&error);
1719 * mono_thread_current:
1722 mono_thread_current (void)
1724 MonoDomain *domain = mono_domain_get ();
1725 MonoInternalThread *internal = mono_thread_internal_current ();
1726 MonoThread **current_thread_ptr;
1728 g_assert (internal);
1729 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1731 if (!*current_thread_ptr) {
1732 g_assert (domain != mono_get_root_domain ());
1733 *current_thread_ptr = create_thread_object (domain, internal);
1735 return *current_thread_ptr;
1738 /* Return the thread object belonging to INTERNAL in the current domain */
1740 mono_thread_current_for_thread (MonoInternalThread *internal)
1742 MonoDomain *domain = mono_domain_get ();
1743 MonoThread **current_thread_ptr;
1745 g_assert (internal);
1746 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1748 if (!*current_thread_ptr) {
1749 g_assert (domain != mono_get_root_domain ());
1750 *current_thread_ptr = create_thread_object (domain, internal);
1752 return *current_thread_ptr;
1756 mono_thread_internal_current (void)
1758 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1759 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1763 static MonoThreadInfoWaitRet
1764 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1767 MonoThreadInfoWaitRet ret;
1774 start = (ms == -1) ? 0 : mono_msec_ticks ();
1777 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1780 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1783 exc = mono_thread_execute_interruption ();
1785 mono_error_set_exception_instance (error, exc);
1792 /* Re-calculate ms according to the time passed */
1793 diff_ms = (gint32)(mono_msec_ticks () - start);
1794 if (diff_ms >= ms) {
1795 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1798 wait = ms - diff_ms;
1805 ves_icall_System_Threading_Thread_Join_internal (MonoThread *this_obj, int ms)
1807 MonoInternalThread *thread = this_obj->internal_thread;
1808 MonoThreadHandle *handle = thread->handle;
1809 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1813 if (mono_thread_current_check_pending_interrupt ())
1816 LOCK_THREAD (thread);
1818 if ((thread->state & ThreadState_Unstarted) != 0) {
1819 UNLOCK_THREAD (thread);
1821 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1825 MonoNativeThreadId tid = thread_get_tid (thread);
1827 UNLOCK_THREAD (thread);
1830 ms = MONO_INFINITE_WAIT;
1831 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1833 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1835 ret = mono_join_uninterrupted (handle, ms, &error);
1837 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1839 mono_error_set_pending_exception (&error);
1841 if (ret == MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1842 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1845 /* TODO: Do this on Unix platforms as well. See PR #5454 for context. */
1846 /* Wait for the thread to really exit */
1848 /* This shouldn't block */
1849 mono_threads_join_lock ();
1850 mono_native_thread_join (tid);
1851 mono_threads_join_unlock ();
1858 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1863 #define MANAGED_WAIT_FAILED 0x7fffffff
1866 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1868 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1869 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1870 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1871 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1872 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1873 return WAIT_IO_COMPLETION;
1874 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1875 return WAIT_TIMEOUT;
1876 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1877 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1878 return MANAGED_WAIT_FAILED;
1880 g_error ("%s: unknown val value %d", __func__, val);
1885 ves_icall_System_Threading_WaitHandle_Wait_internal (gpointer *handles, gint32 numhandles, MonoBoolean waitall, gint32 timeout, MonoError *error)
1887 MonoW32HandleWaitRet ret;
1888 MonoInternalThread *thread;
1891 guint32 timeoutLeft;
1893 /* Do this WaitSleepJoin check before creating objects */
1894 if (mono_thread_current_check_pending_interrupt ())
1895 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1897 thread = mono_thread_internal_current ();
1899 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1902 timeout = MONO_INFINITE_WAIT;
1903 if (timeout != MONO_INFINITE_WAIT)
1904 start = mono_msec_ticks ();
1906 timeoutLeft = timeout;
1911 if (numhandles != 1)
1912 ret = mono_w32handle_convert_wait_ret (WaitForMultipleObjectsEx (numhandles, handles, waitall, timeoutLeft, TRUE), numhandles);
1914 ret = mono_w32handle_convert_wait_ret (WaitForSingleObjectEx (handles [0], timeoutLeft, TRUE), 1);
1916 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1917 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, timeoutLeft, TRUE);
1918 #endif /* HOST_WIN32 */
1921 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1924 exc = mono_thread_execute_interruption ();
1926 mono_error_set_exception_instance (error, exc);
1930 if (timeout != MONO_INFINITE_WAIT) {
1933 elapsed = mono_msec_ticks () - start;
1934 if (elapsed >= timeout) {
1935 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1939 timeoutLeft = timeout - elapsed;
1943 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1945 return map_native_wait_result_to_managed (ret, numhandles);
1949 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (gpointer toSignal, gpointer toWait, gint32 ms, MonoError *error)
1951 MonoW32HandleWaitRet ret;
1952 MonoInternalThread *thread = mono_thread_internal_current ();
1955 ms = MONO_INFINITE_WAIT;
1957 if (mono_thread_current_check_pending_interrupt ())
1958 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1960 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1964 ret = mono_w32handle_convert_wait_ret (SignalObjectAndWait (toSignal, toWait, ms, TRUE), 1);
1966 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
1970 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1972 return map_native_wait_result_to_managed (ret, 1);
1975 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1977 return InterlockedIncrement (location);
1980 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1982 #if SIZEOF_VOID_P == 4
1983 if (G_UNLIKELY ((size_t)location & 0x7)) {
1985 mono_interlocked_lock ();
1988 mono_interlocked_unlock ();
1992 return InterlockedIncrement64 (location);
1995 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1997 return InterlockedDecrement(location);
2000 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
2002 #if SIZEOF_VOID_P == 4
2003 if (G_UNLIKELY ((size_t)location & 0x7)) {
2005 mono_interlocked_lock ();
2008 mono_interlocked_unlock ();
2012 return InterlockedDecrement64 (location);
2015 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2017 return InterlockedExchange(location, value);
2020 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2023 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2024 mono_gc_wbarrier_generic_nostore (location);
2028 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2030 return InterlockedExchangePointer(location, value);
2033 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2035 IntFloatUnion val, ret;
2038 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2044 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2046 #if SIZEOF_VOID_P == 4
2047 if (G_UNLIKELY ((size_t)location & 0x7)) {
2049 mono_interlocked_lock ();
2052 mono_interlocked_unlock ();
2056 return InterlockedExchange64 (location, value);
2060 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2062 LongDoubleUnion val, ret;
2065 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2070 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2072 return InterlockedCompareExchange(location, value, comparand);
2075 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2077 gint32 r = InterlockedCompareExchange(location, value, comparand);
2078 *success = r == comparand;
2082 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2085 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2086 mono_gc_wbarrier_generic_nostore (location);
2090 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2092 return InterlockedCompareExchangePointer(location, value, comparand);
2095 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2097 IntFloatUnion val, ret, cmp;
2100 cmp.fval = comparand;
2101 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2107 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2109 #if SIZEOF_VOID_P == 8
2110 LongDoubleUnion val, comp, ret;
2113 comp.fval = comparand;
2114 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2120 mono_interlocked_lock ();
2122 if (old == comparand)
2124 mono_interlocked_unlock ();
2131 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2133 #if SIZEOF_VOID_P == 4
2134 if (G_UNLIKELY ((size_t)location & 0x7)) {
2136 mono_interlocked_lock ();
2138 if (old == comparand)
2140 mono_interlocked_unlock ();
2144 return InterlockedCompareExchange64 (location, value, comparand);
2148 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2151 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2152 mono_gc_wbarrier_generic_nostore (location);
2157 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2160 MONO_CHECK_NULL (location, NULL);
2161 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2162 mono_gc_wbarrier_generic_nostore (location);
2167 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2169 return InterlockedAdd (location, value);
2173 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2175 #if SIZEOF_VOID_P == 4
2176 if (G_UNLIKELY ((size_t)location & 0x7)) {
2178 mono_interlocked_lock ();
2181 mono_interlocked_unlock ();
2185 return InterlockedAdd64 (location, value);
2189 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2191 #if SIZEOF_VOID_P == 4
2192 if (G_UNLIKELY ((size_t)location & 0x7)) {
2194 mono_interlocked_lock ();
2196 mono_interlocked_unlock ();
2200 return InterlockedRead64 (location);
2204 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2206 mono_memory_barrier ();
2210 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2212 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2214 if (state & ThreadState_Background) {
2215 /* If the thread changes the background mode, the main thread has to
2216 * be notified, since it has to rebuild the list of threads to
2219 mono_os_event_set (&background_change_event);
2224 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2226 mono_thread_set_state (this_obj, (MonoThreadState)state);
2228 if (state & ThreadState_Background) {
2229 /* If the thread changes the background mode, the main thread has to
2230 * be notified, since it has to rebuild the list of threads to
2233 mono_os_event_set (&background_change_event);
2238 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2242 LOCK_THREAD (this_obj);
2244 state = this_obj->state;
2246 UNLOCK_THREAD (this_obj);
2251 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2253 MonoInternalThread *current;
2255 MonoInternalThread *thread = this_obj->internal_thread;
2257 LOCK_THREAD (thread);
2259 current = mono_thread_internal_current ();
2261 thread->thread_interrupt_requested = TRUE;
2262 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2264 UNLOCK_THREAD (thread);
2267 async_abort_internal (thread, FALSE);
2272 * mono_thread_current_check_pending_interrupt:
2273 * Checks if there's a interruption request and set the pending exception if so.
2274 * \returns true if a pending exception was set
2277 mono_thread_current_check_pending_interrupt (void)
2279 MonoInternalThread *thread = mono_thread_internal_current ();
2280 gboolean throw_ = FALSE;
2282 LOCK_THREAD (thread);
2284 if (thread->thread_interrupt_requested) {
2286 thread->thread_interrupt_requested = FALSE;
2289 UNLOCK_THREAD (thread);
2292 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2297 request_thread_abort (MonoInternalThread *thread, MonoObject *state)
2299 LOCK_THREAD (thread);
2301 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2303 UNLOCK_THREAD (thread);
2307 if ((thread->state & ThreadState_Unstarted) != 0) {
2308 thread->state |= ThreadState_Aborted;
2309 UNLOCK_THREAD (thread);
2313 thread->state |= ThreadState_AbortRequested;
2314 if (thread->abort_state_handle)
2315 mono_gchandle_free (thread->abort_state_handle);
2317 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2318 g_assert (thread->abort_state_handle);
2320 thread->abort_state_handle = 0;
2322 thread->abort_exc = NULL;
2324 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));
2326 /* During shutdown, we can't wait for other threads */
2328 /* Make sure the thread is awake */
2329 mono_thread_resume (thread);
2331 UNLOCK_THREAD (thread);
2336 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2338 if (!request_thread_abort (thread, state))
2341 if (thread == mono_thread_internal_current ()) {
2343 self_abort_internal (&error);
2344 mono_error_set_pending_exception (&error);
2346 async_abort_internal (thread, TRUE);
2351 * mono_thread_internal_abort:
2352 * Request thread \p thread to be aborted.
2353 * \p thread MUST NOT be the current thread.
2356 mono_thread_internal_abort (MonoInternalThread *thread)
2358 g_assert (thread != mono_thread_internal_current ());
2360 if (!request_thread_abort (thread, NULL))
2362 async_abort_internal (thread, TRUE);
2366 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2368 MonoInternalThread *thread = mono_thread_internal_current ();
2369 gboolean was_aborting;
2371 LOCK_THREAD (thread);
2372 was_aborting = thread->state & ThreadState_AbortRequested;
2373 thread->state &= ~ThreadState_AbortRequested;
2374 UNLOCK_THREAD (thread);
2376 if (!was_aborting) {
2377 const char *msg = "Unable to reset abort because no abort was requested";
2378 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2382 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2383 thread->abort_exc = NULL;
2384 if (thread->abort_state_handle) {
2385 mono_gchandle_free (thread->abort_state_handle);
2386 /* This is actually not necessary - the handle
2387 only counts if the exception is set */
2388 thread->abort_state_handle = 0;
2393 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2395 LOCK_THREAD (thread);
2397 thread->state &= ~ThreadState_AbortRequested;
2399 if (thread->abort_exc) {
2400 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2401 thread->abort_exc = NULL;
2402 if (thread->abort_state_handle) {
2403 mono_gchandle_free (thread->abort_state_handle);
2404 /* This is actually not necessary - the handle
2405 only counts if the exception is set */
2406 thread->abort_state_handle = 0;
2410 UNLOCK_THREAD (thread);
2414 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2417 MonoInternalThread *thread = this_obj->internal_thread;
2418 MonoObject *state, *deserialized = NULL;
2421 if (!thread->abort_state_handle)
2424 state = mono_gchandle_get_target (thread->abort_state_handle);
2427 domain = mono_domain_get ();
2428 if (mono_object_domain (state) == domain)
2431 deserialized = mono_object_xdomain_representation (state, domain, &error);
2433 if (!deserialized) {
2434 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2435 if (!is_ok (&error)) {
2436 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2437 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2439 mono_set_pending_exception (invalid_op_exc);
2443 return deserialized;
2447 mono_thread_suspend (MonoInternalThread *thread)
2449 LOCK_THREAD (thread);
2451 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2453 UNLOCK_THREAD (thread);
2457 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2459 UNLOCK_THREAD (thread);
2463 thread->state |= ThreadState_SuspendRequested;
2464 mono_os_event_reset (thread->suspended);
2466 if (thread == mono_thread_internal_current ()) {
2467 /* calls UNLOCK_THREAD (thread) */
2468 self_suspend_internal ();
2470 /* calls UNLOCK_THREAD (thread) */
2471 async_suspend_internal (thread, FALSE);
2478 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2480 if (!mono_thread_suspend (this_obj->internal_thread)) {
2481 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2486 /* LOCKING: LOCK_THREAD(thread) must be held */
2488 mono_thread_resume (MonoInternalThread *thread)
2490 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2491 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2492 thread->state &= ~ThreadState_SuspendRequested;
2493 mono_os_event_set (thread->suspended);
2497 if ((thread->state & ThreadState_Suspended) == 0 ||
2498 (thread->state & ThreadState_Unstarted) != 0 ||
2499 (thread->state & ThreadState_Aborted) != 0 ||
2500 (thread->state & ThreadState_Stopped) != 0)
2502 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2506 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2508 mono_os_event_set (thread->suspended);
2510 if (!thread->self_suspended) {
2511 UNLOCK_THREAD (thread);
2513 /* Awake the thread */
2514 if (!mono_thread_info_resume (thread_get_tid (thread)))
2517 LOCK_THREAD (thread);
2520 thread->state &= ~ThreadState_Suspended;
2526 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2528 if (!thread->internal_thread) {
2529 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2531 LOCK_THREAD (thread->internal_thread);
2532 if (!mono_thread_resume (thread->internal_thread))
2533 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2534 UNLOCK_THREAD (thread->internal_thread);
2539 mono_threads_is_critical_method (MonoMethod *method)
2541 switch (method->wrapper_type) {
2542 case MONO_WRAPPER_RUNTIME_INVOKE:
2543 case MONO_WRAPPER_XDOMAIN_INVOKE:
2544 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2551 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2556 if (mono_threads_is_critical_method (m)) {
2557 *((gboolean*)data) = TRUE;
2564 is_running_protected_wrapper (void)
2566 gboolean found = FALSE;
2567 mono_stack_walk (find_wrapper, &found);
2575 mono_thread_stop (MonoThread *thread)
2577 MonoInternalThread *internal = thread->internal_thread;
2579 if (!request_thread_abort (internal, NULL))
2582 if (internal == mono_thread_internal_current ()) {
2584 self_abort_internal (&error);
2586 This function is part of the embeding API and has no way to return the exception
2587 to be thrown. So what we do is keep the old behavior and raise the exception.
2589 mono_error_raise_exception (&error); /* OK to throw, see note */
2591 async_abort_internal (internal, TRUE);
2596 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2598 gint8 tmp = *(volatile gint8 *)ptr;
2599 mono_memory_barrier ();
2604 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2606 gint16 tmp = *(volatile gint16 *)ptr;
2607 mono_memory_barrier ();
2612 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2614 gint32 tmp = *(volatile gint32 *)ptr;
2615 mono_memory_barrier ();
2620 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2622 gint64 tmp = *(volatile gint64 *)ptr;
2623 mono_memory_barrier ();
2628 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2630 volatile void *tmp = *(volatile void **)ptr;
2631 mono_memory_barrier ();
2632 return (void *) tmp;
2636 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2638 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2639 mono_memory_barrier ();
2640 return (MonoObject *) tmp;
2644 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2646 double tmp = *(volatile double *)ptr;
2647 mono_memory_barrier ();
2652 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2654 float tmp = *(volatile float *)ptr;
2655 mono_memory_barrier ();
2660 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2662 return InterlockedRead8 ((volatile gint8 *)ptr);
2666 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2668 return InterlockedRead16 ((volatile gint16 *)ptr);
2672 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2674 return InterlockedRead ((volatile gint32 *)ptr);
2678 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2680 #if SIZEOF_VOID_P == 4
2681 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2683 mono_interlocked_lock ();
2684 val = *(gint64*)ptr;
2685 mono_interlocked_unlock ();
2689 return InterlockedRead64 ((volatile gint64 *)ptr);
2693 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2695 return InterlockedReadPointer ((volatile gpointer *)ptr);
2699 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2703 #if SIZEOF_VOID_P == 4
2704 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2706 mono_interlocked_lock ();
2707 val = *(double*)ptr;
2708 mono_interlocked_unlock ();
2713 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2719 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2723 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2729 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2731 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2735 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2737 mono_memory_barrier ();
2738 *(volatile gint8 *)ptr = value;
2742 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2744 mono_memory_barrier ();
2745 *(volatile gint16 *)ptr = value;
2749 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2751 mono_memory_barrier ();
2752 *(volatile gint32 *)ptr = value;
2756 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2758 mono_memory_barrier ();
2759 *(volatile gint64 *)ptr = value;
2763 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2765 mono_memory_barrier ();
2766 *(volatile void **)ptr = value;
2770 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2772 mono_memory_barrier ();
2773 mono_gc_wbarrier_generic_store (ptr, value);
2777 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2779 mono_memory_barrier ();
2780 *(volatile double *)ptr = value;
2784 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2786 mono_memory_barrier ();
2787 *(volatile float *)ptr = value;
2791 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2793 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2797 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2799 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2803 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2805 InterlockedWrite ((volatile gint32 *)ptr, value);
2809 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2811 #if SIZEOF_VOID_P == 4
2812 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2813 mono_interlocked_lock ();
2814 *(gint64*)ptr = value;
2815 mono_interlocked_unlock ();
2820 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2824 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2826 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2830 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2834 #if SIZEOF_VOID_P == 4
2835 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2836 mono_interlocked_lock ();
2837 *(double*)ptr = value;
2838 mono_interlocked_unlock ();
2845 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2849 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2855 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2859 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2861 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2865 free_context (void *user_data)
2867 ContextStaticData *data = user_data;
2869 mono_threads_lock ();
2872 * There is no guarantee that, by the point this reference queue callback
2873 * has been invoked, the GC handle associated with the object will fail to
2874 * resolve as one might expect. So if we don't free and remove the GC
2875 * handle here, free_context_static_data_helper () could end up resolving
2876 * a GC handle to an actually-dead context which would contain a pointer
2877 * to an already-freed static data segment, resulting in a crash when
2880 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2882 mono_threads_unlock ();
2884 mono_gchandle_free (data->gc_handle);
2885 mono_free_static_data (data->static_data);
2890 mono_threads_register_app_context (MonoAppContext *ctx, MonoError *error)
2893 mono_threads_lock ();
2895 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2898 contexts = g_hash_table_new (NULL, NULL);
2901 context_queue = mono_gc_reference_queue_new (free_context);
2903 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2904 g_hash_table_insert (contexts, gch, gch);
2907 * We use this intermediate structure to contain a duplicate pointer to
2908 * the static data because we can't rely on being able to resolve the GC
2909 * handle in the reference queue callback.
2911 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2912 data->gc_handle = GPOINTER_TO_UINT (gch);
2915 context_adjust_static_data (ctx);
2916 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2918 mono_threads_unlock ();
2920 MONO_PROFILER_RAISE (context_loaded, (ctx));
2924 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContextHandle ctx, MonoError *error)
2927 mono_threads_register_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_register_app_context */
2931 mono_threads_release_app_context (MonoAppContext* ctx, MonoError *error)
2934 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2935 * cleanup in exceptional circumstances, we don't actually do any
2936 * cleanup work here. We instead do this via a reference queue.
2939 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2941 MONO_PROFILER_RAISE (context_unloaded, (ctx));
2945 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContextHandle ctx, MonoError *error)
2948 mono_threads_release_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_release_app_context */
2951 void mono_thread_init (MonoThreadStartCB start_cb,
2952 MonoThreadAttachCB attach_cb)
2954 mono_coop_mutex_init_recursive (&threads_mutex);
2956 mono_os_mutex_init_recursive(&interlocked_mutex);
2957 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2959 mono_os_event_init (&background_change_event, FALSE);
2961 mono_init_static_data_info (&thread_static_info);
2962 mono_init_static_data_info (&context_static_info);
2964 mono_thread_start_cb = start_cb;
2965 mono_thread_attach_cb = attach_cb;
2969 thread_attach (MonoThreadInfo *info)
2971 return mono_gc_thread_attach (info);
2975 thread_detach (MonoThreadInfo *info)
2977 MonoInternalThread *internal;
2980 /* If a delegate is passed to native code and invoked on a thread we dont
2981 * know about, marshal will register it with mono_threads_attach_coop, but
2982 * we have no way of knowing when that thread goes away. SGen has a TSD
2983 * so we assume that if the domain is still registered, we can detach
2988 if (!mono_thread_info_try_get_internal_thread_gchandle (info, &gchandle))
2991 internal = (MonoInternalThread*) mono_gchandle_get_target (gchandle);
2992 g_assert (internal);
2994 mono_gchandle_free (gchandle);
2996 mono_thread_detach_internal (internal);
3000 thread_detach_with_lock (MonoThreadInfo *info)
3002 return mono_gc_thread_detach_with_lock (info);
3006 thread_in_critical_region (MonoThreadInfo *info)
3008 return mono_gc_thread_in_critical_region (info);
3012 ip_in_critical_region (MonoDomain *domain, gpointer ip)
3018 * We pass false for 'try_aot' so this becomes async safe.
3019 * It won't find aot methods whose jit info is not yet loaded,
3020 * so we preload their jit info in the JIT.
3022 ji = mono_jit_info_table_find_internal (domain, ip, FALSE, FALSE);
3026 method = mono_jit_info_get_method (ji);
3029 return mono_gc_is_critical_method (method);
3033 mono_thread_callbacks_init (void)
3035 MonoThreadInfoCallbacks cb;
3037 memset (&cb, 0, sizeof(cb));
3038 cb.thread_attach = thread_attach;
3039 cb.thread_detach = thread_detach;
3040 cb.thread_detach_with_lock = thread_detach_with_lock;
3041 cb.ip_in_critical_region = ip_in_critical_region;
3042 cb.thread_in_critical_region = thread_in_critical_region;
3043 mono_thread_info_callbacks_init (&cb);
3047 * mono_thread_cleanup:
3050 mono_thread_cleanup (void)
3052 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3053 /* The main thread must abandon any held mutexes (particularly
3054 * important for named mutexes as they are shared across
3055 * processes, see bug 74680.) This will happen when the
3056 * thread exits, but if it's not running in a subthread it
3057 * won't exit in time.
3059 mono_w32mutex_abandon ();
3063 /* This stuff needs more testing, it seems one of these
3064 * critical sections can be locked when mono_thread_cleanup is
3067 mono_coop_mutex_destroy (&threads_mutex);
3068 mono_os_mutex_destroy (&interlocked_mutex);
3069 mono_os_mutex_destroy (&delayed_free_table_mutex);
3070 mono_os_mutex_destroy (&small_id_mutex);
3071 mono_os_event_destroy (&background_change_event);
3076 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3078 mono_thread_cleanup_fn = func;
3082 * mono_thread_set_manage_callback:
3085 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3087 thread->internal_thread->manage_callback = func;
3091 static void print_tids (gpointer key, gpointer value, gpointer user)
3093 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3094 * sizeof(uint) and a cast to uint would overflow
3096 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3097 * print this as a pointer.
3099 g_message ("Waiting for: %p", key);
3104 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3105 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3110 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3113 MonoThreadInfoWaitRet ret;
3115 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3117 /* Add the thread state change event, so it wakes
3118 * up if a thread changes to background mode. */
3121 if (check_state_change)
3122 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3124 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3127 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3128 /* See the comment in build_wait_tids() */
3129 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3133 for( i = 0; i < wait->num; i++)
3134 mono_threads_close_thread_handle (wait->handles [i]);
3136 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3139 if (ret < wait->num) {
3140 MonoInternalThread *internal;
3142 internal = wait->threads [ret];
3144 mono_threads_lock ();
3145 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3146 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3147 mono_threads_unlock ();
3151 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3153 struct wait_data *wait=(struct wait_data *)user;
3155 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3156 MonoInternalThread *thread=(MonoInternalThread *)value;
3158 /* Ignore background threads, we abort them later */
3159 /* Do not lock here since it is not needed and the caller holds threads_lock */
3160 if (thread->state & ThreadState_Background) {
3161 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3162 return; /* just leave, ignore */
3165 if (mono_gc_is_finalizer_internal_thread (thread)) {
3166 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3170 if (thread == mono_thread_internal_current ()) {
3171 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3175 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3176 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3180 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3181 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3185 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3186 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3187 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3188 wait->threads[wait->num]=thread;
3191 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3193 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3198 /* Just ignore the rest, we can't do anything with
3205 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3207 struct wait_data *wait=(struct wait_data *)user;
3208 MonoNativeThreadId self = mono_native_thread_id_get ();
3209 MonoInternalThread *thread = (MonoInternalThread *)value;
3211 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3214 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3216 if (mono_gc_is_finalizer_internal_thread (thread))
3219 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3220 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3221 wait->threads[wait->num] = thread;
3224 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3225 mono_thread_internal_abort (thread);
3232 * mono_threads_set_shutting_down:
3234 * Is called by a thread that wants to shut down Mono. If the runtime is already
3235 * shutting down, the calling thread is suspended/stopped, and this function never
3239 mono_threads_set_shutting_down (void)
3241 MonoInternalThread *current_thread = mono_thread_internal_current ();
3243 mono_threads_lock ();
3245 if (shutting_down) {
3246 mono_threads_unlock ();
3248 /* Make sure we're properly suspended/stopped */
3250 LOCK_THREAD (current_thread);
3252 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3253 UNLOCK_THREAD (current_thread);
3254 mono_thread_execute_interruption ();
3256 UNLOCK_THREAD (current_thread);
3259 /*since we're killing the thread, detach it.*/
3260 mono_thread_detach_internal (current_thread);
3262 /* Wake up other threads potentially waiting for us */
3263 mono_thread_info_exit (0);
3265 shutting_down = TRUE;
3267 /* Not really a background state change, but this will
3268 * interrupt the main thread if it is waiting for all
3269 * the other threads.
3271 mono_os_event_set (&background_change_event);
3273 mono_threads_unlock ();
3278 * mono_thread_manage:
3281 mono_thread_manage (void)
3283 struct wait_data wait_data;
3284 struct wait_data *wait = &wait_data;
3286 memset (wait, 0, sizeof (struct wait_data));
3287 /* join each thread that's still running */
3288 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3290 mono_threads_lock ();
3292 THREAD_DEBUG (g_message("%s: No threads", __func__));
3293 mono_threads_unlock ();
3296 mono_threads_unlock ();
3299 mono_threads_lock ();
3300 if (shutting_down) {
3301 /* somebody else is shutting down */
3302 mono_threads_unlock ();
3305 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3306 mono_g_hash_table_foreach (threads, print_tids, NULL));
3308 mono_os_event_reset (&background_change_event);
3310 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3311 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3312 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3313 mono_threads_unlock ();
3315 /* Something to wait for */
3316 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3317 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3318 } while(wait->num>0);
3320 /* Mono is shutting down, so just wait for the end */
3321 if (!mono_runtime_try_shutdown ()) {
3322 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3323 mono_thread_suspend (mono_thread_internal_current ());
3324 mono_thread_execute_interruption ();
3328 * Remove everything but the finalizer thread and self.
3329 * Also abort all the background threads
3332 mono_threads_lock ();
3335 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3336 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3337 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3339 mono_threads_unlock ();
3341 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3342 if (wait->num > 0) {
3343 /* Something to wait for */
3344 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3346 } while (wait->num > 0);
3349 * give the subthreads a chance to really quit (this is mainly needed
3350 * to get correct user and system times from getrusage/wait/time(1)).
3351 * This could be removed if we avoid pthread_detach() and use pthread_join().
3353 mono_thread_info_yield ();
3357 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3359 MonoInternalThread *thread = (MonoInternalThread*)value;
3360 struct wait_data *wait = (struct wait_data*)user_data;
3363 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3365 * This needs no locking.
3367 if ((thread->state & ThreadState_Suspended) != 0 ||
3368 (thread->state & ThreadState_Stopped) != 0)
3371 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3372 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3373 wait->threads [wait->num] = thread;
3379 * mono_thread_suspend_all_other_threads:
3381 * Suspend all managed threads except the finalizer thread and this thread. It is
3382 * not possible to resume them later.
3384 void mono_thread_suspend_all_other_threads (void)
3386 struct wait_data wait_data;
3387 struct wait_data *wait = &wait_data;
3389 MonoNativeThreadId self = mono_native_thread_id_get ();
3390 guint32 eventidx = 0;
3391 gboolean starting, finished;
3393 memset (wait, 0, sizeof (struct wait_data));
3395 * The other threads could be in an arbitrary state at this point, i.e.
3396 * they could be starting up, shutting down etc. This means that there could be
3397 * threads which are not even in the threads hash table yet.
3401 * First we set a barrier which will be checked by all threads before they
3402 * are added to the threads hash table, and they will exit if the flag is set.
3403 * This ensures that no threads could be added to the hash later.
3404 * We will use shutting_down as the barrier for now.
3406 g_assert (shutting_down);
3409 * We make multiple calls to WaitForMultipleObjects since:
3410 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3411 * - some threads could exit without becoming suspended
3416 * Make a copy of the hashtable since we can't do anything with
3417 * threads while threads_mutex is held.
3420 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3421 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3422 mono_threads_lock ();
3423 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3424 mono_threads_unlock ();
3427 /* Get the suspended events that we'll be waiting for */
3428 for (i = 0; i < wait->num; ++i) {
3429 MonoInternalThread *thread = wait->threads [i];
3431 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3432 || mono_gc_is_finalizer_internal_thread (thread)
3433 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3435 mono_threads_close_thread_handle (wait->handles [i]);
3436 wait->threads [i] = NULL;
3440 LOCK_THREAD (thread);
3442 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3443 UNLOCK_THREAD (thread);
3444 mono_threads_close_thread_handle (wait->handles [i]);
3445 wait->threads [i] = NULL;
3451 /* Convert abort requests into suspend requests */
3452 if ((thread->state & ThreadState_AbortRequested) != 0)
3453 thread->state &= ~ThreadState_AbortRequested;
3455 thread->state |= ThreadState_SuspendRequested;
3456 mono_os_event_reset (thread->suspended);
3458 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3459 async_suspend_internal (thread, TRUE);
3461 mono_threads_close_thread_handle (wait->handles [i]);
3462 wait->threads [i] = NULL;
3464 if (eventidx <= 0) {
3466 * If there are threads which are starting up, we wait until they
3467 * are suspended when they try to register in the threads hash.
3468 * This is guaranteed to finish, since the threads which can create new
3469 * threads get suspended after a while.
3470 * FIXME: The finalizer thread can still create new threads.
3472 mono_threads_lock ();
3473 if (threads_starting_up)
3474 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3477 mono_threads_unlock ();
3479 mono_thread_info_sleep (100, NULL);
3487 MonoInternalThread *thread;
3488 MonoStackFrameInfo *frames;
3489 int nframes, max_frames;
3490 int nthreads, max_threads;
3491 MonoInternalThread **threads;
3492 } ThreadDumpUserData;
3494 static gboolean thread_dump_requested;
3496 /* This needs to be async safe */
3498 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3500 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3502 if (ud->nframes < ud->max_frames) {
3503 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3510 /* This needs to be async safe */
3511 static SuspendThreadResult
3512 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3514 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3515 MonoInternalThread *thread = user_data->thread;
3518 /* This no longer works with remote unwinding */
3519 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3520 mono_thread_internal_describe (thread, text);
3521 g_string_append (text, "\n");
3524 if (thread == mono_thread_internal_current ())
3525 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3527 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3529 return MonoResumeThread;
3533 int nthreads, max_threads;
3534 MonoInternalThread **threads;
3535 } CollectThreadsUserData;
3538 collect_thread (gpointer key, gpointer value, gpointer user)
3540 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3541 MonoInternalThread *thread = (MonoInternalThread *)value;
3543 if (ud->nthreads < ud->max_threads)
3544 ud->threads [ud->nthreads ++] = thread;
3548 * Collect running threads into the THREADS array.
3549 * THREADS should be an array allocated on the stack.
3552 collect_threads (MonoInternalThread **thread_array, int max_threads)
3554 CollectThreadsUserData ud;
3556 memset (&ud, 0, sizeof (ud));
3557 /* This array contains refs, but its on the stack, so its ok */
3558 ud.threads = thread_array;
3559 ud.max_threads = max_threads;
3561 mono_threads_lock ();
3562 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3563 mono_threads_unlock ();
3569 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3571 GString* text = g_string_new (0);
3573 GError *error = NULL;
3576 ud->thread = thread;
3579 /* Collect frames for the thread */
3580 if (thread == mono_thread_internal_current ()) {
3581 get_thread_dump (mono_thread_info_current (), ud);
3583 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3587 * Do all the non async-safe work outside of get_thread_dump.
3590 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3592 g_string_append_printf (text, "\n\"%s\"", name);
3595 else if (thread->threadpool_thread) {
3596 g_string_append (text, "\n\"<threadpool thread>\"");
3598 g_string_append (text, "\n\"<unnamed thread>\"");
3601 for (i = 0; i < ud->nframes; ++i) {
3602 MonoStackFrameInfo *frame = &ud->frames [i];
3603 MonoMethod *method = NULL;
3605 if (frame->type == FRAME_TYPE_MANAGED)
3606 method = mono_jit_info_get_method (frame->ji);
3609 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3610 g_string_append_printf (text, " %s\n", location);
3613 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3617 fprintf (stdout, "%s", text->str);
3619 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3620 OutputDebugStringA(text->str);
3623 g_string_free (text, TRUE);
3628 mono_threads_perform_thread_dump (void)
3630 ThreadDumpUserData ud;
3631 MonoInternalThread *thread_array [128];
3632 int tindex, nthreads;
3634 if (!thread_dump_requested)
3637 printf ("Full thread dump:\n");
3639 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3640 nthreads = collect_threads (thread_array, 128);
3642 memset (&ud, 0, sizeof (ud));
3643 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3644 ud.max_frames = 256;
3646 for (tindex = 0; tindex < nthreads; ++tindex)
3647 dump_thread (thread_array [tindex], &ud);
3651 thread_dump_requested = FALSE;
3654 /* Obtain the thread dump of all threads */
3656 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3659 ThreadDumpUserData ud;
3660 MonoInternalThread *thread_array [128];
3661 MonoDomain *domain = mono_domain_get ();
3662 MonoDebugSourceLocation *location;
3663 int tindex, nthreads;
3667 *out_threads = NULL;
3668 *out_stack_frames = NULL;
3670 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3671 nthreads = collect_threads (thread_array, 128);
3673 memset (&ud, 0, sizeof (ud));
3674 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3675 ud.max_frames = 256;
3677 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3680 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3684 for (tindex = 0; tindex < nthreads; ++tindex) {
3685 MonoInternalThread *thread = thread_array [tindex];
3686 MonoArray *thread_frames;
3692 /* Collect frames for the thread */
3693 if (thread == mono_thread_internal_current ()) {
3694 get_thread_dump (mono_thread_info_current (), &ud);
3696 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3699 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3701 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3704 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3706 for (i = 0; i < ud.nframes; ++i) {
3707 MonoStackFrameInfo *frame = &ud.frames [i];
3708 MonoMethod *method = NULL;
3709 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3713 sf->native_offset = frame->native_offset;
3715 if (frame->type == FRAME_TYPE_MANAGED)
3716 method = mono_jit_info_get_method (frame->ji);
3719 sf->method_address = (gsize) frame->ji->code_start;
3721 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3724 MONO_OBJECT_SETREF (sf, method, rm);
3726 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3728 sf->il_offset = location->il_offset;
3730 if (location && location->source_file) {
3731 MonoString *filename = mono_string_new_checked (domain, location->source_file, error);
3734 MONO_OBJECT_SETREF (sf, filename, filename);
3735 sf->line = location->row;
3736 sf->column = location->column;
3738 mono_debug_free_source_location (location);
3743 mono_array_setref (thread_frames, i, sf);
3749 return is_ok (error);
3753 * mono_threads_request_thread_dump:
3755 * Ask all threads except the current to print their stacktrace to stdout.
3758 mono_threads_request_thread_dump (void)
3760 /*The new thread dump code runs out of the finalizer thread. */
3761 thread_dump_requested = TRUE;
3762 mono_gc_finalize_notify ();
3767 gint allocated; /* +1 so that refs [allocated] == NULL */
3771 typedef struct ref_stack RefStack;
3774 ref_stack_new (gint initial_size)
3778 initial_size = MAX (initial_size, 16) + 1;
3779 rs = g_new0 (RefStack, 1);
3780 rs->refs = g_new0 (gpointer, initial_size);
3781 rs->allocated = initial_size;
3786 ref_stack_destroy (gpointer ptr)
3788 RefStack *rs = (RefStack *)ptr;
3797 ref_stack_push (RefStack *rs, gpointer ptr)
3799 g_assert (rs != NULL);
3801 if (rs->bottom >= rs->allocated) {
3802 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3803 rs->allocated <<= 1;
3804 rs->refs [rs->allocated] = NULL;
3806 rs->refs [rs->bottom++] = ptr;
3810 ref_stack_pop (RefStack *rs)
3812 if (rs == NULL || rs->bottom == 0)
3816 rs->refs [rs->bottom] = NULL;
3820 ref_stack_find (RefStack *rs, gpointer ptr)
3827 for (refs = rs->refs; refs && *refs; refs++) {
3835 * mono_thread_push_appdomain_ref:
3837 * Register that the current thread may have references to objects in domain
3838 * @domain on its stack. Each call to this function should be paired with a
3839 * call to pop_appdomain_ref.
3842 mono_thread_push_appdomain_ref (MonoDomain *domain)
3844 MonoInternalThread *thread = mono_thread_internal_current ();
3847 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3848 SPIN_LOCK (thread->lock_thread_id);
3849 if (thread->appdomain_refs == NULL)
3850 thread->appdomain_refs = ref_stack_new (16);
3851 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3852 SPIN_UNLOCK (thread->lock_thread_id);
3857 mono_thread_pop_appdomain_ref (void)
3859 MonoInternalThread *thread = mono_thread_internal_current ();
3862 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3863 SPIN_LOCK (thread->lock_thread_id);
3864 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3865 SPIN_UNLOCK (thread->lock_thread_id);
3870 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3873 SPIN_LOCK (thread->lock_thread_id);
3874 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3875 SPIN_UNLOCK (thread->lock_thread_id);
3880 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3882 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3885 typedef struct abort_appdomain_data {
3886 struct wait_data wait;
3888 } abort_appdomain_data;
3891 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3893 MonoInternalThread *thread = (MonoInternalThread*)value;
3894 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3895 MonoDomain *domain = data->domain;
3897 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3898 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3900 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3901 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3902 data->wait.threads [data->wait.num] = thread;
3905 /* Just ignore the rest, we can't do anything with
3913 * mono_threads_abort_appdomain_threads:
3915 * Abort threads which has references to the given appdomain.
3918 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3920 abort_appdomain_data user_data;
3922 int orig_timeout = timeout;
3925 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3927 start_time = mono_msec_ticks ();
3929 mono_threads_lock ();
3931 user_data.domain = domain;
3932 user_data.wait.num = 0;
3933 /* This shouldn't take any locks */
3934 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3935 mono_threads_unlock ();
3937 if (user_data.wait.num > 0) {
3938 /* Abort the threads outside the threads lock */
3939 for (i = 0; i < user_data.wait.num; ++i)
3940 mono_thread_internal_abort (user_data.wait.threads [i]);
3943 * We should wait for the threads either to abort, or to leave the
3944 * domain. We can't do the latter, so we wait with a timeout.
3946 wait_for_tids (&user_data.wait, 100, FALSE);
3949 /* Update remaining time */
3950 timeout -= mono_msec_ticks () - start_time;
3951 start_time = mono_msec_ticks ();
3953 if (orig_timeout != -1 && timeout < 0)
3956 while (user_data.wait.num > 0);
3958 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3964 mono_thread_self_abort (void)
3967 self_abort_internal (&error);
3968 mono_error_set_pending_exception (&error);
3972 * mono_thread_get_undeniable_exception:
3974 * Return an exception which needs to be raised when leaving a catch clause.
3975 * This is used for undeniable exception propagation.
3978 mono_thread_get_undeniable_exception (void)
3980 MonoInternalThread *thread = mono_thread_internal_current ();
3982 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3985 // We don't want to have our exception effect calls made by
3986 // the catching block
3988 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
3992 * FIXME: Clear the abort exception and return an AppDomainUnloaded
3993 * exception if the thread no longer references a dying appdomain.
3995 thread->abort_exc->trace_ips = NULL;
3996 thread->abort_exc->stack_trace = NULL;
3997 return thread->abort_exc;
4000 #if MONO_SMALL_CONFIG
4001 #define NUM_STATIC_DATA_IDX 4
4002 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4006 #define NUM_STATIC_DATA_IDX 8
4007 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4008 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
4012 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
4013 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
4016 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
4018 gpointer *static_data = (gpointer *)addr;
4020 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
4021 void **ptr = (void **)static_data [i];
4026 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4027 void **p = ptr + idx;
4030 mark_func ((MonoObject**)p, gc_data);
4036 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4038 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4042 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4044 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4048 * mono_alloc_static_data
4050 * Allocate memory blocks for storing threads or context static data
4053 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4055 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4058 gpointer* static_data = *static_data_ptr;
4060 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4061 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4063 if (mono_gc_user_markers_supported ()) {
4064 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4065 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4067 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4068 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4071 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4072 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4073 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4074 *static_data_ptr = static_data;
4075 static_data [0] = static_data;
4078 for (i = 1; i <= idx; ++i) {
4079 if (static_data [i])
4082 if (mono_gc_user_markers_supported ())
4083 static_data [i] = g_malloc0 (static_data_size [i]);
4085 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4086 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4087 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4092 mono_free_static_data (gpointer* static_data)
4095 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4096 gpointer p = static_data [i];
4100 * At this point, the static data pointer array is still registered with the
4101 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4102 * data. Freeing the individual arrays without first nulling their slots
4103 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4104 * such an already freed array. See bug #13813.
4106 static_data [i] = NULL;
4107 mono_memory_write_barrier ();
4108 if (mono_gc_user_markers_supported ())
4111 mono_gc_free_fixed (p);
4113 mono_gc_free_fixed (static_data);
4117 * mono_init_static_data_info
4119 * Initializes static data counters
4121 static void mono_init_static_data_info (StaticDataInfo *static_data)
4123 static_data->idx = 0;
4124 static_data->offset = 0;
4125 static_data->freelist = NULL;
4129 * mono_alloc_static_data_slot
4131 * Generates an offset for static data. static_data contains the counters
4132 * used to generate it.
4135 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4137 if (!static_data->idx && !static_data->offset) {
4139 * we use the first chunk of the first allocation also as
4140 * an array for the rest of the data
4142 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4144 static_data->offset += align - 1;
4145 static_data->offset &= ~(align - 1);
4146 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4147 static_data->idx ++;
4148 g_assert (size <= static_data_size [static_data->idx]);
4149 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4150 static_data->offset = 0;
4152 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4153 static_data->offset += size;
4158 * LOCKING: requires that threads_mutex is held
4161 context_adjust_static_data (MonoAppContext *ctx)
4163 if (context_static_info.offset || context_static_info.idx > 0) {
4164 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4165 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4166 ctx->data->static_data = ctx->static_data;
4171 * LOCKING: requires that threads_mutex is held
4174 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4176 MonoInternalThread *thread = (MonoInternalThread *)value;
4177 guint32 offset = GPOINTER_TO_UINT (user);
4179 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4183 * LOCKING: requires that threads_mutex is held
4186 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4188 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4193 guint32 offset = GPOINTER_TO_UINT (user);
4194 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4195 ctx->data->static_data = ctx->static_data;
4198 static StaticDataFreeList*
4199 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4201 StaticDataFreeList* prev = NULL;
4202 StaticDataFreeList* tmp = static_data->freelist;
4204 if (tmp->size == size) {
4206 prev->next = tmp->next;
4208 static_data->freelist = tmp->next;
4217 #if SIZEOF_VOID_P == 4
4224 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4226 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4228 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4229 MonoBitSet *rb = sets [idx];
4230 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4231 offset /= sizeof (uintptr_t);
4232 /* offset is now the bitmap offset */
4233 for (int i = 0; i < numbits; ++i) {
4234 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4235 mono_bitset_set_fast (rb, offset + i);
4240 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4242 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4243 MonoBitSet *rb = sets [idx];
4244 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4245 offset /= sizeof (uintptr_t);
4246 /* offset is now the bitmap offset */
4247 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4248 mono_bitset_clear_fast (rb, offset + i);
4252 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4254 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4256 StaticDataInfo *info;
4259 if (static_type == SPECIAL_STATIC_THREAD) {
4260 info = &thread_static_info;
4261 sets = thread_reference_bitmaps;
4263 info = &context_static_info;
4264 sets = context_reference_bitmaps;
4267 mono_threads_lock ();
4269 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4273 offset = item->offset;
4276 offset = mono_alloc_static_data_slot (info, size, align);
4279 update_reference_bitmap (sets, offset, bitmap, numbits);
4281 if (static_type == SPECIAL_STATIC_THREAD) {
4282 /* This can be called during startup */
4283 if (threads != NULL)
4284 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4286 if (contexts != NULL)
4287 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4289 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4292 mono_threads_unlock ();
4298 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4300 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4302 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4303 return get_thread_static_data (thread, offset);
4305 return get_context_static_data (thread->current_appcontext, offset);
4310 mono_get_special_static_data (guint32 offset)
4312 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4321 * LOCKING: requires that threads_mutex is held
4324 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4326 MonoInternalThread *thread = (MonoInternalThread *)value;
4327 OffsetSize *data = (OffsetSize *)user;
4328 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4329 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4332 if (!thread->static_data || !thread->static_data [idx])
4334 ptr = ((char*) thread->static_data [idx]) + off;
4335 mono_gc_bzero_atomic (ptr, data->size);
4339 * LOCKING: requires that threads_mutex is held
4342 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4344 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4349 OffsetSize *data = (OffsetSize *)user;
4350 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4351 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4354 if (!ctx->static_data || !ctx->static_data [idx])
4357 ptr = ((char*) ctx->static_data [idx]) + off;
4358 mono_gc_bzero_atomic (ptr, data->size);
4362 do_free_special_slot (guint32 offset, guint32 size)
4364 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4366 StaticDataInfo *info;
4368 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4369 info = &thread_static_info;
4370 sets = thread_reference_bitmaps;
4372 info = &context_static_info;
4373 sets = context_reference_bitmaps;
4376 guint32 data_offset = offset;
4377 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4378 OffsetSize data = { data_offset, size };
4380 clear_reference_bitmap (sets, data.offset, data.size);
4382 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4383 if (threads != NULL)
4384 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4386 if (contexts != NULL)
4387 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4390 if (!mono_runtime_is_shutting_down ()) {
4391 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4393 item->offset = offset;
4396 item->next = info->freelist;
4397 info->freelist = item;
4402 do_free_special (gpointer key, gpointer value, gpointer data)
4404 MonoClassField *field = (MonoClassField *)key;
4405 guint32 offset = GPOINTER_TO_UINT (value);
4408 size = mono_type_size (field->type, &align);
4409 do_free_special_slot (offset, size);
4413 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4415 mono_threads_lock ();
4417 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4419 mono_threads_unlock ();
4423 static void CALLBACK dummy_apc (ULONG_PTR param)
4429 * mono_thread_execute_interruption
4431 * Performs the operation that the requested thread state requires (abort,
4434 static MonoException*
4435 mono_thread_execute_interruption (void)
4437 MonoInternalThread *thread = mono_thread_internal_current ();
4438 MonoThread *sys_thread = mono_thread_current ();
4440 LOCK_THREAD (thread);
4442 /* MonoThread::interruption_requested can only be changed with atomics */
4443 if (!mono_thread_clear_interruption_requested (thread)) {
4444 UNLOCK_THREAD (thread);
4448 /* this will consume pending APC calls */
4450 WaitForSingleObjectEx (GetCurrentThread(), 0, TRUE);
4452 /* Clear the interrupted flag of the thread so it can wait again */
4453 mono_thread_info_clear_self_interrupt ();
4455 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4456 if (sys_thread->pending_exception) {
4459 exc = sys_thread->pending_exception;
4460 sys_thread->pending_exception = NULL;
4462 UNLOCK_THREAD (thread);
4464 } else if (thread->state & (ThreadState_AbortRequested)) {
4465 UNLOCK_THREAD (thread);
4466 g_assert (sys_thread->pending_exception == NULL);
4467 if (thread->abort_exc == NULL) {
4469 * This might be racy, but it has to be called outside the lock
4470 * since it calls managed code.
4472 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4474 return thread->abort_exc;
4475 } else if (thread->state & (ThreadState_SuspendRequested)) {
4476 /* calls UNLOCK_THREAD (thread) */
4477 self_suspend_internal ();
4479 } else if (thread->thread_interrupt_requested) {
4481 thread->thread_interrupt_requested = FALSE;
4482 UNLOCK_THREAD (thread);
4484 return(mono_get_exception_thread_interrupted ());
4487 UNLOCK_THREAD (thread);
4493 * mono_thread_request_interruption
4495 * A signal handler can call this method to request the interruption of a
4496 * thread. The result of the interruption will depend on the current state of
4497 * the thread. If the result is an exception that needs to be throw, it is
4498 * provided as return value.
4501 mono_thread_request_interruption (gboolean running_managed)
4503 MonoInternalThread *thread = mono_thread_internal_current ();
4505 /* The thread may already be stopping */
4509 if (!mono_thread_set_interruption_requested (thread))
4512 if (!running_managed || is_running_protected_wrapper ()) {
4513 /* Can't stop while in unmanaged code. Increase the global interruption
4514 request count. When exiting the unmanaged method the count will be
4515 checked and the thread will be interrupted. */
4517 /* this will awake the thread if it is in WaitForSingleObject
4519 /* Our implementation of this function ignores the func argument */
4521 QueueUserAPC ((PAPCFUNC)dummy_apc, thread->native_handle, (ULONG_PTR)NULL);
4523 mono_thread_info_self_interrupt ();
4528 return mono_thread_execute_interruption ();
4532 /*This function should be called by a thread after it has exited all of
4533 * its handle blocks at interruption time.*/
4535 mono_thread_resume_interruption (gboolean exec)
4537 MonoInternalThread *thread = mono_thread_internal_current ();
4538 gboolean still_aborting;
4540 /* The thread may already be stopping */
4544 LOCK_THREAD (thread);
4545 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4546 UNLOCK_THREAD (thread);
4548 /*This can happen if the protected block called Thread::ResetAbort*/
4549 if (!still_aborting)
4552 if (!mono_thread_set_interruption_requested (thread))
4555 mono_thread_info_self_interrupt ();
4558 return mono_thread_execute_interruption ();
4563 gboolean mono_thread_interruption_requested ()
4565 if (thread_interruption_requested) {
4566 MonoInternalThread *thread = mono_thread_internal_current ();
4567 /* The thread may already be stopping */
4569 return mono_thread_get_interruption_requested (thread);
4574 static MonoException*
4575 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4577 MonoInternalThread *thread = mono_thread_internal_current ();
4579 /* The thread may already be stopping */
4582 if (!mono_thread_get_interruption_requested (thread))
4584 if (!bypass_abort_protection && is_running_protected_wrapper ())
4587 return mono_thread_execute_interruption ();
4591 * Performs the interruption of the current thread, if one has been requested,
4592 * and the thread is not running a protected wrapper.
4593 * Return the exception which needs to be thrown, if any.
4596 mono_thread_interruption_checkpoint (void)
4598 return mono_thread_interruption_checkpoint_request (FALSE);
4602 * Performs the interruption of the current thread, if one has been requested.
4603 * Return the exception which needs to be thrown, if any.
4606 mono_thread_force_interruption_checkpoint_noraise (void)
4608 return mono_thread_interruption_checkpoint_request (TRUE);
4612 * mono_set_pending_exception:
4614 * Set the pending exception of the current thread to EXC.
4615 * The exception will be thrown when execution returns to managed code.
4618 mono_set_pending_exception (MonoException *exc)
4620 MonoThread *thread = mono_thread_current ();
4622 /* The thread may already be stopping */
4626 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4628 mono_thread_request_interruption (FALSE);
4632 * mono_thread_interruption_request_flag:
4634 * Returns the address of a flag that will be non-zero if an interruption has
4635 * been requested for a thread. The thread to interrupt may not be the current
4636 * thread, so an additional call to mono_thread_interruption_requested() or
4637 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4640 gint32* mono_thread_interruption_request_flag ()
4642 return &thread_interruption_requested;
4646 mono_thread_init_apartment_state (void)
4649 MonoInternalThread* thread = mono_thread_internal_current ();
4651 /* Positive return value indicates success, either
4652 * S_OK if this is first CoInitialize call, or
4653 * S_FALSE if CoInitialize already called, but with same
4654 * threading model. A negative value indicates failure,
4655 * probably due to trying to change the threading model.
4657 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4658 ? COINIT_APARTMENTTHREADED
4659 : COINIT_MULTITHREADED) < 0) {
4660 thread->apartment_state = ThreadApartmentState_Unknown;
4666 mono_thread_cleanup_apartment_state (void)
4669 MonoInternalThread* thread = mono_thread_internal_current ();
4671 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4678 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4680 LOCK_THREAD (thread);
4681 thread->state |= state;
4682 UNLOCK_THREAD (thread);
4686 * mono_thread_test_and_set_state:
4687 * Test if current state of \p thread include \p test. If it does not, OR \p set into the state.
4688 * \returns TRUE if \p set was OR'd in.
4691 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4693 LOCK_THREAD (thread);
4695 if ((thread->state & test) != 0) {
4696 UNLOCK_THREAD (thread);
4700 thread->state |= set;
4701 UNLOCK_THREAD (thread);
4707 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4709 LOCK_THREAD (thread);
4710 thread->state &= ~state;
4711 UNLOCK_THREAD (thread);
4715 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4717 gboolean ret = FALSE;
4719 LOCK_THREAD (thread);
4721 if ((thread->state & test) != 0) {
4725 UNLOCK_THREAD (thread);
4731 self_interrupt_thread (void *_unused)
4734 MonoThreadInfo *info;
4736 exc = mono_thread_execute_interruption ();
4738 if (mono_threads_is_coop_enabled ()) {
4739 /* We can return from an async call in coop, as
4740 * it's simply called when exiting the safepoint */
4744 g_error ("%s: we can't resume from an async call", __func__);
4747 info = mono_thread_info_current ();
4749 /* We must use _with_context since we didn't trampoline into the runtime */
4750 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. */
4754 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4758 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4762 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4764 MonoJitInfo **dest = (MonoJitInfo **)data;
4770 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4772 MonoJitInfo *ji = NULL;
4777 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4778 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4779 * where we hold runtime locks.
4781 if (!mono_threads_is_coop_enabled ())
4782 mono_thread_info_set_is_async_context (TRUE);
4783 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4784 if (!mono_threads_is_coop_enabled ())
4785 mono_thread_info_set_is_async_context (FALSE);
4790 MonoInternalThread *thread;
4791 gboolean install_async_abort;
4792 MonoThreadInfoInterruptToken *interrupt_token;
4795 static SuspendThreadResult
4796 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4798 AbortThreadData *data = (AbortThreadData *)ud;
4799 MonoInternalThread *thread = data->thread;
4800 MonoJitInfo *ji = NULL;
4801 gboolean protected_wrapper;
4802 gboolean running_managed;
4804 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4805 return MonoResumeThread;
4807 /*someone is already interrupting it*/
4808 if (!mono_thread_set_interruption_requested (thread))
4809 return MonoResumeThread;
4811 ji = mono_thread_info_get_last_managed (info);
4812 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4813 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4815 if (!protected_wrapper && running_managed) {
4816 /*We are in managed code*/
4817 /*Set the thread to call */
4818 if (data->install_async_abort)
4819 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4820 return MonoResumeThread;
4823 * This will cause waits to be broken.
4824 * It will also prevent the thread from entering a wait, so if the thread returns
4825 * from the wait before it receives the abort signal, it will just spin in the wait
4826 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4829 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4831 return MonoResumeThread;
4836 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4838 AbortThreadData data;
4840 g_assert (thread != mono_thread_internal_current ());
4842 data.thread = thread;
4843 data.install_async_abort = install_async_abort;
4844 data.interrupt_token = NULL;
4846 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4847 if (data.interrupt_token)
4848 mono_thread_info_finish_interrupt (data.interrupt_token);
4849 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4853 self_abort_internal (MonoError *error)
4859 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4860 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4863 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.
4865 exc = mono_thread_request_interruption (TRUE);
4867 mono_error_set_exception_instance (error, exc);
4869 mono_thread_info_self_interrupt ();
4873 MonoInternalThread *thread;
4875 MonoThreadInfoInterruptToken *interrupt_token;
4876 } SuspendThreadData;
4878 static SuspendThreadResult
4879 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4881 SuspendThreadData *data = (SuspendThreadData *)ud;
4882 MonoInternalThread *thread = data->thread;
4883 MonoJitInfo *ji = NULL;
4884 gboolean protected_wrapper;
4885 gboolean running_managed;
4887 ji = mono_thread_info_get_last_managed (info);
4888 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4889 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4891 if (running_managed && !protected_wrapper) {
4892 if (mono_threads_is_coop_enabled ()) {
4893 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4894 return MonoResumeThread;
4896 thread->state &= ~ThreadState_SuspendRequested;
4897 thread->state |= ThreadState_Suspended;
4898 return KeepSuspended;
4901 mono_thread_set_interruption_requested (thread);
4902 if (data->interrupt)
4903 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4905 return MonoResumeThread;
4909 /* LOCKING: called with @thread synch_cs held, and releases it */
4911 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4913 SuspendThreadData data;
4915 g_assert (thread != mono_thread_internal_current ());
4917 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4919 thread->self_suspended = FALSE;
4921 data.thread = thread;
4922 data.interrupt = interrupt;
4923 data.interrupt_token = NULL;
4925 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4926 if (data.interrupt_token)
4927 mono_thread_info_finish_interrupt (data.interrupt_token);
4929 UNLOCK_THREAD (thread);
4932 /* LOCKING: called with @thread synch_cs held, and releases it */
4934 self_suspend_internal (void)
4936 MonoInternalThread *thread;
4938 MonoOSEventWaitRet res;
4940 thread = mono_thread_internal_current ();
4942 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4944 thread->self_suspended = TRUE;
4946 thread->state &= ~ThreadState_SuspendRequested;
4947 thread->state |= ThreadState_Suspended;
4949 UNLOCK_THREAD (thread);
4951 event = thread->suspended;
4954 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4955 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4960 suspend_for_shutdown_async_call (gpointer unused)
4963 mono_thread_info_yield ();
4966 static SuspendThreadResult
4967 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4969 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4970 return MonoResumeThread;
4974 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4976 g_assert (thread != mono_thread_internal_current ());
4978 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4982 * mono_thread_is_foreign:
4983 * \param thread the thread to query
4985 * This function allows one to determine if a thread was created by the mono runtime and has
4986 * a well defined lifecycle or it's a foreign one, created by the native environment.
4988 * \returns TRUE if \p thread was not created by the runtime.
4991 mono_thread_is_foreign (MonoThread *thread)
4993 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
4994 return info->runtime_thread == FALSE;
4998 * mono_add_joinable_thread:
5000 * Add TID to the list of joinable threads.
5001 * LOCKING: Acquires the threads lock.
5004 mono_threads_add_joinable_thread (gpointer tid)
5008 * We cannot detach from threads because it causes problems like
5009 * 2fd16f60/r114307. So we collect them and join them when
5010 * we have time (in he finalizer thread).
5012 joinable_threads_lock ();
5013 if (!joinable_threads)
5014 joinable_threads = g_hash_table_new (NULL, NULL);
5015 g_hash_table_insert (joinable_threads, tid, tid);
5016 UnlockedIncrement (&joinable_thread_count);
5017 joinable_threads_unlock ();
5019 mono_gc_finalize_notify ();
5024 * mono_threads_join_threads:
5026 * Join all joinable threads. This is called from the finalizer thread.
5027 * LOCKING: Acquires the threads lock.
5030 mono_threads_join_threads (void)
5033 GHashTableIter iter;
5040 if (!UnlockedRead (&joinable_thread_count))
5044 joinable_threads_lock ();
5046 if (g_hash_table_size (joinable_threads)) {
5047 g_hash_table_iter_init (&iter, joinable_threads);
5048 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5049 thread = (pthread_t)tid;
5050 g_hash_table_remove (joinable_threads, key);
5051 UnlockedDecrement (&joinable_thread_count);
5054 joinable_threads_unlock ();
5056 if (thread != pthread_self ()) {
5058 /* This shouldn't block */
5059 mono_threads_join_lock ();
5060 mono_native_thread_join (thread);
5061 mono_threads_join_unlock ();
5074 * Wait for thread TID to exit.
5075 * LOCKING: Acquires the threads lock.
5078 mono_thread_join (gpointer tid)
5082 gboolean found = FALSE;
5084 joinable_threads_lock ();
5085 if (!joinable_threads)
5086 joinable_threads = g_hash_table_new (NULL, NULL);
5087 if (g_hash_table_lookup (joinable_threads, tid)) {
5088 g_hash_table_remove (joinable_threads, tid);
5089 UnlockedDecrement (&joinable_thread_count);
5092 joinable_threads_unlock ();
5095 thread = (pthread_t)tid;
5097 mono_native_thread_join (thread);
5103 mono_thread_internal_unhandled_exception (MonoObject* exc)
5105 MonoClass *klass = exc->vtable->klass;
5106 if (is_threadabort_exception (klass)) {
5107 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5108 } else if (!is_appdomainunloaded_exception (klass)
5109 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5110 mono_unhandled_exception (exc);
5111 if (mono_environment_exitcode_get () == 1) {
5112 mono_environment_exitcode_set (255);
5113 mono_invoke_unhandled_exception_hook (exc);
5114 g_assert_not_reached ();
5120 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5123 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5124 mono_error_set_pending_exception (&error);
5128 * mono_threads_attach_coop: called by native->managed wrappers
5131 * - blocking mode: contains gc unsafe transition cookie
5132 * - non-blocking mode: contains random data
5133 * - @return: the original domain which needs to be restored, or NULL.
5136 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5139 MonoThreadInfo *info;
5142 orig = mono_domain_get ();
5145 /* Happens when called from AOTed code which is only used in the root domain. */
5146 domain = mono_get_root_domain ();
5150 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5151 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5152 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5153 * we're only responsible for making the cookie. */
5154 if (mono_threads_is_blocking_transition_enabled ())
5155 external = !(info = mono_thread_info_current_unchecked ()) || !mono_thread_info_is_live (info);
5157 if (!mono_thread_internal_current ()) {
5158 mono_thread_attach_full (domain, FALSE);
5161 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5165 mono_domain_set (domain, TRUE);
5167 if (mono_threads_is_blocking_transition_enabled ()) {
5169 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5170 * return the right cookie. */
5171 *dummy = mono_threads_enter_gc_unsafe_region_cookie ();
5173 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5174 *dummy = mono_threads_enter_gc_unsafe_region (dummy);
5182 * mono_threads_detach_coop: called by native->managed wrappers
5184 * - @cookie: the original domain which needs to be restored, or NULL.
5186 * - blocking mode: contains gc unsafe transition cookie
5187 * - non-blocking mode: contains random data
5190 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5192 MonoDomain *domain, *orig;
5194 orig = (MonoDomain*) cookie;
5196 domain = mono_domain_get ();
5199 if (mono_threads_is_blocking_transition_enabled ()) {
5200 /* it won't do anything if cookie is NULL
5201 * thread state RUNNING -> (RUNNING|BLOCKING) */
5202 mono_threads_exit_gc_unsafe_region (*dummy, dummy);
5205 if (orig != domain) {
5207 mono_domain_unset ();
5209 mono_domain_set (orig, TRUE);
5214 /* Returns TRUE if the current thread is ready to be interrupted. */
5216 mono_threads_is_ready_to_be_interrupted (void)
5218 MonoInternalThread *thread;
5220 thread = mono_thread_internal_current ();
5221 LOCK_THREAD (thread);
5222 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5223 UNLOCK_THREAD (thread);
5227 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5228 UNLOCK_THREAD (thread);
5232 UNLOCK_THREAD (thread);
5238 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5240 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5242 if (internal->thread_info) {
5243 g_string_append (text, ", state : ");
5244 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5247 if (internal->owned_mutexes) {
5250 g_string_append (text, ", owns : [");
5251 for (i = 0; i < internal->owned_mutexes->len; i++)
5252 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5253 g_string_append (text, "]");
5258 mono_thread_internal_is_current (MonoInternalThread *internal)
5260 g_assert (internal);
5261 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));