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>
57 #include <mono/utils/mono-os-wait.h>
63 #if defined(HOST_WIN32)
67 #if defined(HOST_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
68 #define USE_TKILL_ON_ANDROID 1
74 #ifdef USE_TKILL_ON_ANDROID
75 extern int tkill (pid_t tid, int signal);
79 /*#define THREAD_DEBUG(a) do { a; } while (0)*/
80 #define THREAD_DEBUG(a)
81 /*#define THREAD_WAIT_DEBUG(a) do { a; } while (0)*/
82 #define THREAD_WAIT_DEBUG(a)
83 /*#define LIBGC_DEBUG(a) do { a; } while (0)*/
84 #define LIBGC_DEBUG(a)
86 #define SPIN_TRYLOCK(i) (InterlockedCompareExchange (&(i), 1, 0) == 0)
87 #define SPIN_LOCK(i) do { \
88 if (SPIN_TRYLOCK (i)) \
92 #define SPIN_UNLOCK(i) i = 0
94 #define LOCK_THREAD(thread) lock_thread((thread))
95 #define UNLOCK_THREAD(thread) unlock_thread((thread))
107 typedef struct _StaticDataFreeList StaticDataFreeList;
108 struct _StaticDataFreeList {
109 StaticDataFreeList *next;
117 StaticDataFreeList *freelist;
120 /* Controls access to the 'threads' hash table */
121 static void mono_threads_lock (void);
122 static void mono_threads_unlock (void);
123 static MonoCoopMutex threads_mutex;
125 /* Controls access to the 'joinable_threads' hash table */
126 #define joinable_threads_lock() mono_os_mutex_lock (&joinable_threads_mutex)
127 #define joinable_threads_unlock() mono_os_mutex_unlock (&joinable_threads_mutex)
128 static mono_mutex_t joinable_threads_mutex;
130 /* Holds current status of static data heap */
131 static StaticDataInfo thread_static_info;
132 static StaticDataInfo context_static_info;
134 /* The hash of existing threads (key is thread ID, value is
135 * MonoInternalThread*) that need joining before exit
137 static MonoGHashTable *threads=NULL;
139 /* List of app context GC handles.
140 * Added to from mono_threads_register_app_context ().
142 static GHashTable *contexts = NULL;
144 /* Cleanup queue for contexts. */
145 static MonoReferenceQueue *context_queue;
148 * Threads which are starting up and they are not in the 'threads' hash yet.
149 * When mono_thread_attach_internal is called for a thread, it will be removed from this hash table.
150 * Protected by mono_threads_lock ().
152 static MonoGHashTable *threads_starting_up = NULL;
155 /* Protected by the threads lock */
156 static GHashTable *joinable_threads;
157 static gint32 joinable_thread_count;
159 #define SET_CURRENT_OBJECT(x) mono_tls_set_thread (x)
160 #define GET_CURRENT_OBJECT() (MonoInternalThread*) mono_tls_get_thread ()
162 /* function called at thread start */
163 static MonoThreadStartCB mono_thread_start_cb = NULL;
165 /* function called at thread attach */
166 static MonoThreadAttachCB mono_thread_attach_cb = NULL;
168 /* function called at thread cleanup */
169 static MonoThreadCleanupFunc mono_thread_cleanup_fn = NULL;
171 /* The default stack size for each thread */
172 static guint32 default_stacksize = 0;
173 #define default_stacksize_for_thread(thread) ((thread)->stack_size? (thread)->stack_size: default_stacksize)
175 static void context_adjust_static_data (MonoAppContext *ctx);
176 static void mono_free_static_data (gpointer* static_data);
177 static void mono_init_static_data_info (StaticDataInfo *static_data);
178 static guint32 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align);
179 static gboolean mono_thread_resume (MonoInternalThread* thread);
180 static void async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort);
181 static void self_abort_internal (MonoError *error);
182 static void async_suspend_internal (MonoInternalThread *thread, gboolean interrupt);
183 static void self_suspend_internal (void);
185 static MonoException* mono_thread_execute_interruption (void);
186 static void ref_stack_destroy (gpointer rs);
188 /* Spin lock for InterlockedXXX 64 bit functions */
189 #define mono_interlocked_lock() mono_os_mutex_lock (&interlocked_mutex)
190 #define mono_interlocked_unlock() mono_os_mutex_unlock (&interlocked_mutex)
191 static mono_mutex_t interlocked_mutex;
193 /* global count of thread interruptions requested */
194 static gint32 thread_interruption_requested = 0;
196 /* Event signaled when a thread changes its background mode */
197 static MonoOSEvent background_change_event;
199 static gboolean shutting_down = FALSE;
201 static gint32 managed_thread_id_counter = 0;
204 mono_threads_lock (void)
206 mono_locks_coop_acquire (&threads_mutex, ThreadsLock);
210 mono_threads_unlock (void)
212 mono_locks_coop_release (&threads_mutex, ThreadsLock);
217 get_next_managed_thread_id (void)
219 return InterlockedIncrement (&managed_thread_id_counter);
223 * We separate interruptions/exceptions into either sync (they can be processed anytime,
224 * normally as soon as they are set, and are set by the same thread) and async (they can't
225 * be processed inside abort protected blocks and are normally set by other threads). We
226 * can have both a pending sync and async interruption. In this case, the sync exception is
227 * processed first. Since we clean sync flag first, mono_thread_execute_interruption must
228 * also handle all sync type exceptions before the async type exceptions.
231 INTERRUPT_SYNC_REQUESTED_BIT = 0x1,
232 INTERRUPT_ASYNC_REQUESTED_BIT = 0x2,
233 INTERRUPT_REQUESTED_MASK = 0x3,
234 ABORT_PROT_BLOCK_SHIFT = 2,
235 ABORT_PROT_BLOCK_BITS = 8,
236 ABORT_PROT_BLOCK_MASK = (((1 << ABORT_PROT_BLOCK_BITS) - 1) << ABORT_PROT_BLOCK_SHIFT)
240 mono_thread_get_abort_prot_block_count (MonoInternalThread *thread)
242 gsize state = thread->thread_state;
243 return (state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT;
247 mono_threads_begin_abort_protected_block (void)
249 MonoInternalThread *thread = mono_thread_internal_current ();
250 gsize old_state, new_state;
253 old_state = thread->thread_state;
255 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) + 1;
256 //bounds check abort_prot_count
257 g_assert (new_val > 0);
258 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
260 new_state = old_state + (1 << ABORT_PROT_BLOCK_SHIFT);
261 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
263 /* Defer async request since we won't be able to process until exiting the block */
264 if (new_val == 1 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
265 InterlockedDecrement (&thread_interruption_requested);
266 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);
267 if (thread_interruption_requested < 0)
268 g_warning ("bad thread_interruption_requested state");
270 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);
275 mono_thread_state_has_interruption (gsize state)
277 /* pending exception, self abort */
278 if (state & INTERRUPT_SYNC_REQUESTED_BIT)
281 /* abort, interruption, suspend */
282 if ((state & INTERRUPT_ASYNC_REQUESTED_BIT) && !(state & ABORT_PROT_BLOCK_MASK))
289 mono_threads_end_abort_protected_block (void)
291 MonoInternalThread *thread = mono_thread_internal_current ();
292 gsize old_state, new_state;
295 old_state = thread->thread_state;
297 //bounds check abort_prot_count
298 new_val = ((old_state & ABORT_PROT_BLOCK_MASK) >> ABORT_PROT_BLOCK_SHIFT) - 1;
299 g_assert (new_val >= 0);
300 g_assert (new_val < (1 << ABORT_PROT_BLOCK_BITS));
302 new_state = old_state - (1 << ABORT_PROT_BLOCK_SHIFT);
303 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
305 if (new_val == 0 && (new_state & INTERRUPT_ASYNC_REQUESTED_BIT)) {
306 InterlockedIncrement (&thread_interruption_requested);
307 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);
309 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);
312 return mono_thread_state_has_interruption (new_state);
316 mono_thread_get_interruption_requested (MonoInternalThread *thread)
318 gsize state = thread->thread_state;
320 return mono_thread_state_has_interruption (state);
324 * Returns TRUE is there was a state change
325 * We clear a single interruption request, sync has priority.
328 mono_thread_clear_interruption_requested (MonoInternalThread *thread)
330 gsize old_state, new_state;
332 old_state = thread->thread_state;
334 // no interruption to process
335 if (!(old_state & INTERRUPT_SYNC_REQUESTED_BIT) &&
336 (!(old_state & INTERRUPT_ASYNC_REQUESTED_BIT) || (old_state & ABORT_PROT_BLOCK_MASK)))
339 if (old_state & INTERRUPT_SYNC_REQUESTED_BIT)
340 new_state = old_state & ~INTERRUPT_SYNC_REQUESTED_BIT;
342 new_state = old_state & ~INTERRUPT_ASYNC_REQUESTED_BIT;
343 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
345 InterlockedDecrement (&thread_interruption_requested);
346 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);
347 if (thread_interruption_requested < 0)
348 g_warning ("bad thread_interruption_requested state");
352 /* Returns TRUE is there was a state change and the interruption can be processed */
354 mono_thread_set_interruption_requested (MonoInternalThread *thread)
356 //always force when the current thread is doing it to itself.
357 gboolean sync = thread == mono_thread_internal_current ();
358 gsize old_state, new_state;
360 old_state = thread->thread_state;
363 if ((sync && (old_state & INTERRUPT_SYNC_REQUESTED_BIT)) ||
364 (!sync && (old_state & INTERRUPT_ASYNC_REQUESTED_BIT)))
368 new_state = old_state | INTERRUPT_SYNC_REQUESTED_BIT;
370 new_state = old_state | INTERRUPT_ASYNC_REQUESTED_BIT;
371 } while (InterlockedCompareExchangePointer ((volatile gpointer)&thread->thread_state, (gpointer)new_state, (gpointer)old_state) != (gpointer)old_state);
373 if (sync || !(new_state & ABORT_PROT_BLOCK_MASK)) {
374 InterlockedIncrement (&thread_interruption_requested);
375 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);
377 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);
380 return sync || !(new_state & ABORT_PROT_BLOCK_MASK);
383 static inline MonoNativeThreadId
384 thread_get_tid (MonoInternalThread *thread)
386 /* We store the tid as a guint64 to keep the object layout constant between platforms */
387 return MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid);
390 static void ensure_synch_cs_set (MonoInternalThread *thread)
392 MonoCoopMutex *synch_cs;
394 if (thread->synch_cs != NULL) {
398 synch_cs = g_new0 (MonoCoopMutex, 1);
399 mono_coop_mutex_init_recursive (synch_cs);
401 if (InterlockedCompareExchangePointer ((gpointer *)&thread->synch_cs,
402 synch_cs, NULL) != NULL) {
403 /* Another thread must have installed this CS */
404 mono_coop_mutex_destroy (synch_cs);
410 lock_thread (MonoInternalThread *thread)
412 if (!thread->synch_cs)
413 ensure_synch_cs_set (thread);
415 g_assert (thread->synch_cs);
417 mono_coop_mutex_lock (thread->synch_cs);
421 unlock_thread (MonoInternalThread *thread)
423 mono_coop_mutex_unlock (thread->synch_cs);
426 static inline gboolean
427 is_appdomainunloaded_exception (MonoClass *klass)
429 return klass == mono_class_get_appdomain_unloaded_exception_class ();
432 static inline gboolean
433 is_threadabort_exception (MonoClass *klass)
435 return klass == mono_defaults.threadabortexception_class;
439 * A special static data offset (guint32) consists of 3 parts:
441 * [0] 6-bit index into the array of chunks.
442 * [6] 25-bit offset into the array.
443 * [31] Bit indicating thread or context static.
448 #if G_BYTE_ORDER != G_LITTLE_ENDIAN
459 } SpecialStaticOffset;
461 #define SPECIAL_STATIC_OFFSET_TYPE_THREAD 0
462 #define SPECIAL_STATIC_OFFSET_TYPE_CONTEXT 1
464 #define MAKE_SPECIAL_STATIC_OFFSET(idx, off, ty) \
465 ((SpecialStaticOffset) { .fields = { .index = (idx), .offset = (off), .type = (ty) } }.raw)
466 #define ACCESS_SPECIAL_STATIC_OFFSET(x,f) \
467 (((SpecialStaticOffset *) &(x))->fields.f)
470 get_thread_static_data (MonoInternalThread *thread, guint32 offset)
472 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_THREAD);
474 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
475 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
477 return ((char *) thread->static_data [idx]) + off;
481 get_context_static_data (MonoAppContext *ctx, guint32 offset)
483 g_assert (ACCESS_SPECIAL_STATIC_OFFSET (offset, type) == SPECIAL_STATIC_OFFSET_TYPE_CONTEXT);
485 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
486 int off = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
488 return ((char *) ctx->static_data [idx]) + off;
492 get_current_thread_ptr_for_domain (MonoDomain *domain, MonoInternalThread *thread)
494 static MonoClassField *current_thread_field = NULL;
498 if (!current_thread_field) {
499 current_thread_field = mono_class_get_field_from_name (mono_defaults.thread_class, "current_thread");
500 g_assert (current_thread_field);
503 mono_class_vtable (domain, mono_defaults.thread_class);
504 mono_domain_lock (domain);
505 offset = GPOINTER_TO_UINT (g_hash_table_lookup (domain->special_static_fields, current_thread_field));
506 mono_domain_unlock (domain);
509 return (MonoThread **)get_thread_static_data (thread, offset);
513 set_current_thread_for_domain (MonoDomain *domain, MonoInternalThread *thread, MonoThread *current)
515 MonoThread **current_thread_ptr = get_current_thread_ptr_for_domain (domain, thread);
517 g_assert (current->obj.vtable->domain == domain);
519 g_assert (!*current_thread_ptr);
520 *current_thread_ptr = current;
524 create_thread_object (MonoDomain *domain, MonoInternalThread *internal)
530 vtable = mono_class_vtable (domain, mono_defaults.thread_class);
533 thread = (MonoThread*)mono_object_new_mature (vtable, &error);
534 /* only possible failure mode is OOM, from which we don't expect to recover. */
535 mono_error_assert_ok (&error);
537 MONO_OBJECT_SETREF (thread, internal_thread, internal);
542 static MonoInternalThread*
543 create_internal_thread_object (void)
546 MonoInternalThread *thread;
549 vt = mono_class_vtable (mono_get_root_domain (), mono_defaults.internal_thread_class);
550 thread = (MonoInternalThread*) mono_object_new_mature (vt, &error);
551 /* only possible failure mode is OOM, from which we don't exect to recover */
552 mono_error_assert_ok (&error);
554 thread->synch_cs = g_new0 (MonoCoopMutex, 1);
555 mono_coop_mutex_init_recursive (thread->synch_cs);
557 thread->apartment_state = ThreadApartmentState_Unknown;
558 thread->managed_id = get_next_managed_thread_id ();
559 if (mono_gc_is_moving ()) {
560 thread->thread_pinning_ref = thread;
561 MONO_GC_REGISTER_ROOT_PINNING (thread->thread_pinning_ref, MONO_ROOT_SOURCE_THREADING, "thread pinning reference");
564 thread->priority = MONO_THREAD_PRIORITY_NORMAL;
566 thread->suspended = g_new0 (MonoOSEvent, 1);
567 mono_os_event_init (thread->suspended, TRUE);
573 mono_thread_internal_set_priority (MonoInternalThread *internal, MonoThreadPriority priority)
577 g_assert (priority >= MONO_THREAD_PRIORITY_LOWEST);
578 g_assert (priority <= MONO_THREAD_PRIORITY_HIGHEST);
579 g_assert (MONO_THREAD_PRIORITY_LOWEST < MONO_THREAD_PRIORITY_HIGHEST);
584 g_assert (internal->native_handle);
586 res = SetThreadPriority (internal->native_handle, priority - 2);
588 g_error ("%s: SetThreadPriority failed, error %d", __func__, GetLastError ());
589 #else /* HOST_WIN32 */
592 struct sched_param param;
595 tid = thread_get_tid (internal);
597 res = pthread_getschedparam (tid, &policy, ¶m);
599 g_error ("%s: pthread_getschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
601 #ifdef _POSIX_PRIORITY_SCHEDULING
604 /* Necessary to get valid priority range */
606 min = sched_get_priority_min (policy);
607 max = sched_get_priority_max (policy);
609 if (max > 0 && min >= 0 && max > min) {
610 double srange, drange, sposition, dposition;
611 srange = MONO_THREAD_PRIORITY_HIGHEST - MONO_THREAD_PRIORITY_LOWEST;
613 sposition = priority - MONO_THREAD_PRIORITY_LOWEST;
614 dposition = (sposition / srange) * drange;
615 param.sched_priority = (int)(dposition + min);
622 param.sched_priority = 50;
628 param.sched_priority = 0;
631 g_warning ("%s: unknown policy %d", __func__, policy);
636 res = pthread_setschedparam (tid, policy, ¶m);
639 g_warning ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
642 g_error ("%s: pthread_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
644 #endif /* HOST_WIN32 */
648 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal);
651 mono_thread_attach_internal (MonoThread *thread, gboolean force_attach, gboolean force_domain)
653 MonoThreadInfo *info;
654 MonoInternalThread *internal;
655 MonoDomain *domain, *root_domain;
659 info = mono_thread_info_current ();
662 internal = thread->internal_thread;
665 /* It is needed to store the MonoInternalThread on the MonoThreadInfo, because of the following case:
666 * - the MonoInternalThread TLS key is destroyed: set it to NULL
667 * - the MonoThreadInfo TLS key is destroyed: calls mono_thread_info_detach
668 * - it calls MonoThreadInfoCallbacks.thread_detach
669 * - mono_thread_internal_current returns NULL -> fails to detach the MonoInternalThread. */
670 mono_thread_info_set_internal_thread_gchandle (info, mono_gchandle_new ((MonoObject*) internal, FALSE));
672 internal->handle = mono_threads_open_thread_handle (info->handle);
674 internal->native_handle = OpenThread (THREAD_ALL_ACCESS, FALSE, GetCurrentThreadId ());
676 internal->tid = MONO_NATIVE_THREAD_ID_TO_UINT (mono_native_thread_id_get ());
677 internal->thread_info = info;
678 internal->small_id = info->small_id;
680 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Setting current_object_key to %p", __func__, mono_native_thread_id_get (), internal));
682 SET_CURRENT_OBJECT (internal);
684 domain = mono_object_domain (thread);
686 mono_thread_push_appdomain_ref (domain);
687 if (!mono_domain_set (domain, force_domain)) {
688 mono_thread_pop_appdomain_ref ();
692 mono_threads_lock ();
694 if (threads_starting_up)
695 mono_g_hash_table_remove (threads_starting_up, thread);
697 if (shutting_down && !force_attach) {
698 mono_threads_unlock ();
699 mono_thread_pop_appdomain_ref ();
704 threads = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "threads table");
707 /* We don't need to duplicate thread->handle, because it is
708 * only closed when the thread object is finalized by the GC. */
709 mono_g_hash_table_insert (threads, (gpointer)(gsize)(internal->tid), internal);
711 /* We have to do this here because mono_thread_start_cb
712 * requires that root_domain_thread is set up. */
713 if (thread_static_info.offset || thread_static_info.idx > 0) {
714 /* get the current allocated size */
715 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (thread_static_info.idx, thread_static_info.offset, 0);
716 mono_alloc_static_data (&internal->static_data, offset, TRUE);
719 mono_threads_unlock ();
721 root_domain = mono_get_root_domain ();
723 g_assert (!internal->root_domain_thread);
724 if (domain != root_domain)
725 MONO_OBJECT_SETREF (internal, root_domain_thread, create_thread_object (root_domain, internal));
727 MONO_OBJECT_SETREF (internal, root_domain_thread, thread);
729 if (domain != root_domain)
730 set_current_thread_for_domain (root_domain, internal, internal->root_domain_thread);
732 set_current_thread_for_domain (domain, internal, thread);
734 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, internal->tid, internal->handle));
740 mono_thread_detach_internal (MonoInternalThread *thread)
744 g_assert (thread != NULL);
745 SET_CURRENT_OBJECT (thread);
747 THREAD_DEBUG (g_message ("%s: mono_thread_detach for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
750 mono_w32mutex_abandon ();
753 if (thread->abort_state_handle) {
754 mono_gchandle_free (thread->abort_state_handle);
755 thread->abort_state_handle = 0;
758 thread->abort_exc = NULL;
759 thread->current_appcontext = NULL;
762 * thread->synch_cs can be NULL if this was called after
763 * ves_icall_System_Threading_InternalThread_Thread_free_internal.
764 * This can happen only during shutdown.
765 * The shutting_down flag is not always set, so we can't assert on it.
767 if (thread->synch_cs)
768 LOCK_THREAD (thread);
770 thread->state |= ThreadState_Stopped;
771 thread->state &= ~ThreadState_Background;
773 if (thread->synch_cs)
774 UNLOCK_THREAD (thread);
777 An interruption request has leaked to cleanup. Adjust the global counter.
779 This can happen is the abort source thread finds the abortee (this) thread
780 in unmanaged code. If this thread never trips back to managed code or check
781 the local flag it will be left set and positively unbalance the global counter.
783 Leaving the counter unbalanced will cause a performance degradation since all threads
784 will now keep checking their local flags all the time.
786 mono_thread_clear_interruption_requested (thread);
788 mono_threads_lock ();
792 } else if (mono_g_hash_table_lookup (threads, (gpointer)thread->tid) != thread) {
793 /* We have to check whether the thread object for the
794 * tid is still the same in the table because the
795 * thread might have been destroyed and the tid reused
796 * in the meantime, in which case the tid would be in
797 * the table, but with another thread object.
801 mono_g_hash_table_remove (threads, (gpointer)thread->tid);
805 mono_threads_unlock ();
807 /* Don't close the handle here, wait for the object finalizer
808 * to do it. Otherwise, the following race condition applies:
810 * 1) Thread exits (and mono_thread_detach_internal() closes the handle)
812 * 2) Some other handle is reassigned the same slot
814 * 3) Another thread tries to join the first thread, and
815 * blocks waiting for the reassigned handle to be signalled
816 * (which might never happen). This is possible, because the
817 * thread calling Join() still has a reference to the first
821 /* if the thread is not in the hash it has been removed already */
823 mono_domain_unset ();
824 mono_memory_barrier ();
826 if (mono_thread_cleanup_fn)
827 mono_thread_cleanup_fn (thread_get_tid (thread));
832 mono_release_type_locks (thread);
834 /* Can happen when we attach the profiler helper thread in order to heapshot. */
835 if (!mono_thread_info_lookup (MONO_UINT_TO_NATIVE_THREAD_ID (thread->tid))->tools_thread)
836 MONO_PROFILER_RAISE (thread_stopped, (thread->tid));
838 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
841 * This will signal async signal handlers that the thread has exited.
842 * The profiler callback needs this to be set, so it cannot be done earlier.
844 mono_domain_unset ();
845 mono_memory_barrier ();
847 if (thread == mono_thread_internal_current ())
848 mono_thread_pop_appdomain_ref ();
850 mono_free_static_data (thread->static_data);
851 thread->static_data = NULL;
852 ref_stack_destroy (thread->appdomain_refs);
853 thread->appdomain_refs = NULL;
855 g_assert (thread->suspended);
856 mono_os_event_destroy (thread->suspended);
857 g_free (thread->suspended);
858 thread->suspended = NULL;
860 if (mono_thread_cleanup_fn)
861 mono_thread_cleanup_fn (thread_get_tid (thread));
863 mono_memory_barrier ();
865 if (mono_gc_is_moving ()) {
866 MONO_GC_UNREGISTER_ROOT (thread->thread_pinning_ref);
867 thread->thread_pinning_ref = NULL;
871 SET_CURRENT_OBJECT (NULL);
872 mono_domain_unset ();
874 mono_thread_info_unset_internal_thread_gchandle ((MonoThreadInfo*) thread->thread_info);
876 /* Don't need to close the handle to this thread, even though we took a
877 * reference in mono_thread_attach (), because the GC will do it
878 * when the Thread object is finalised.
885 MonoObject *start_delegate;
886 MonoObject *start_delegate_arg;
887 MonoThreadStart start_func;
888 gpointer start_func_arg;
889 gboolean force_attach;
891 MonoCoopSem registered;
894 static guint32 WINAPI start_wrapper_internal(StartInfo *start_info, gsize *stack_ptr)
897 MonoThreadStart start_func;
898 void *start_func_arg;
901 * We don't create a local to hold start_info->thread, so hopefully it won't get pinned during a
905 MonoInternalThread *internal;
906 MonoObject *start_delegate;
907 MonoObject *start_delegate_arg;
910 thread = start_info->thread;
911 internal = thread->internal_thread;
912 domain = mono_object_domain (start_info->thread);
914 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper", __func__, mono_native_thread_id_get ()));
916 if (!mono_thread_attach_internal (thread, start_info->force_attach, FALSE)) {
917 start_info->failed = TRUE;
919 mono_coop_sem_post (&start_info->registered);
921 if (InterlockedDecrement (&start_info->ref) == 0) {
922 mono_coop_sem_destroy (&start_info->registered);
929 mono_thread_internal_set_priority (internal, internal->priority);
933 start_delegate = start_info->start_delegate;
934 start_delegate_arg = start_info->start_delegate_arg;
935 start_func = start_info->start_func;
936 start_func_arg = start_info->start_func_arg;
938 /* This MUST be called before any managed code can be
939 * executed, as it calls the callback function that (for the
940 * jit) sets the lmf marker.
943 if (mono_thread_start_cb)
944 mono_thread_start_cb (tid, stack_ptr, start_func);
946 /* On 2.0 profile (and higher), set explicitly since state might have been
948 if (internal->apartment_state == ThreadApartmentState_Unknown)
949 internal->apartment_state = ThreadApartmentState_MTA;
951 mono_thread_init_apartment_state ();
953 /* Let the thread that called Start() know we're ready */
954 mono_coop_sem_post (&start_info->registered);
956 if (InterlockedDecrement (&start_info->ref) == 0) {
957 mono_coop_sem_destroy (&start_info->registered);
961 /* start_info is not valid anymore */
965 * Call this after calling start_notify, since the profiler callback might want
966 * to lock the thread, and the lock is held by thread_start () which waits for
969 MONO_PROFILER_RAISE (thread_started, (tid));
971 /* if the name was set before starting, we didn't invoke the profiler callback */
972 if (internal->name) {
973 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
974 MONO_PROFILER_RAISE (thread_name, (internal->tid, tname));
975 mono_native_thread_set_name (MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid), tname);
979 /* start_func is set only for unmanaged start functions */
981 start_func (start_func_arg);
985 g_assert (start_delegate != NULL);
987 /* we may want to handle the exception here. See comment below on unhandled exceptions */
988 args [0] = (gpointer) start_delegate_arg;
989 mono_runtime_delegate_invoke_checked (start_delegate, args, &error);
991 if (!mono_error_ok (&error)) {
992 MonoException *ex = mono_error_convert_to_exception (&error);
994 g_assert (ex != NULL);
995 MonoClass *klass = mono_object_get_class (&ex->object);
996 if ((mono_runtime_unhandled_exception_policy_get () != MONO_UNHANDLED_POLICY_LEGACY) &&
997 !is_threadabort_exception (klass)) {
998 mono_unhandled_exception (&ex->object);
999 mono_invoke_unhandled_exception_hook (&ex->object);
1000 g_assert_not_reached ();
1003 mono_error_cleanup (&error);
1007 /* If the thread calls ExitThread at all, this remaining code
1008 * will not be executed, but the main thread will eventually
1009 * call mono_thread_detach_internal() on this thread's behalf.
1012 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Start wrapper terminating", __func__, mono_native_thread_id_get ()));
1014 /* Do any cleanup needed for apartment state. This
1015 * cannot be done in mono_thread_detach_internal since
1016 * mono_thread_detach_internal could be called for a
1017 * thread other than the current thread.
1018 * mono_thread_cleanup_apartment_state cleans up apartment
1019 * for the current thead */
1020 mono_thread_cleanup_apartment_state ();
1022 mono_thread_detach_internal (internal);
1028 start_wrapper (gpointer data)
1030 StartInfo *start_info;
1031 MonoThreadInfo *info;
1034 start_info = (StartInfo*) data;
1035 g_assert (start_info);
1037 info = mono_thread_info_attach ();
1038 info->runtime_thread = TRUE;
1040 /* Run the actual main function of the thread */
1041 res = start_wrapper_internal (start_info, info->stack_end);
1043 mono_thread_info_exit (res);
1045 g_assert_not_reached ();
1051 * Common thread creation code.
1052 * LOCKING: Acquires the threads lock.
1055 create_thread (MonoThread *thread, MonoInternalThread *internal, MonoObject *start_delegate, MonoThreadStart start_func, gpointer start_func_arg,
1056 MonoThreadCreateFlags flags, MonoError *error)
1058 StartInfo *start_info = NULL;
1059 MonoNativeThreadId tid;
1061 gsize stack_set_size;
1064 g_assert (!start_func && !start_func_arg);
1066 g_assert (!start_delegate);
1068 if (flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL) {
1069 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER));
1070 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1072 if (flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER) {
1073 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL));
1074 g_assert (!(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE));
1078 * Join joinable threads to prevent running out of threads since the finalizer
1079 * thread might be blocked/backlogged.
1081 mono_threads_join_threads ();
1085 mono_threads_lock ();
1086 if (shutting_down && !(flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE)) {
1087 mono_threads_unlock ();
1090 if (threads_starting_up == NULL) {
1091 threads_starting_up = mono_g_hash_table_new_type (NULL, NULL, MONO_HASH_KEY_VALUE_GC, MONO_ROOT_SOURCE_THREADING, "starting threads table");
1093 mono_g_hash_table_insert (threads_starting_up, thread, thread);
1094 mono_threads_unlock ();
1096 internal->threadpool_thread = flags & MONO_THREAD_CREATE_FLAGS_THREADPOOL;
1097 if (internal->threadpool_thread)
1098 mono_thread_set_state (internal, ThreadState_Background);
1100 internal->debugger_thread = flags & MONO_THREAD_CREATE_FLAGS_DEBUGGER;
1102 start_info = g_new0 (StartInfo, 1);
1103 start_info->ref = 2;
1104 start_info->thread = thread;
1105 start_info->start_delegate = start_delegate;
1106 start_info->start_delegate_arg = thread->start_obj;
1107 start_info->start_func = start_func;
1108 start_info->start_func_arg = start_func_arg;
1109 start_info->force_attach = flags & MONO_THREAD_CREATE_FLAGS_FORCE_CREATE;
1110 start_info->failed = FALSE;
1111 mono_coop_sem_init (&start_info->registered, 0);
1113 if (flags != MONO_THREAD_CREATE_FLAGS_SMALL_STACK)
1114 stack_set_size = default_stacksize_for_thread (internal);
1118 if (!mono_thread_platform_create_thread (start_wrapper, start_info, &stack_set_size, &tid)) {
1119 /* The thread couldn't be created, so set an exception */
1120 mono_threads_lock ();
1121 mono_g_hash_table_remove (threads_starting_up, thread);
1122 mono_threads_unlock ();
1123 mono_error_set_execution_engine (error, "Couldn't create thread. Error 0x%x", mono_w32error_get_last());
1124 /* ref is not going to be decremented in start_wrapper_internal */
1125 InterlockedDecrement (&start_info->ref);
1130 internal->stack_size = (int) stack_set_size;
1132 THREAD_DEBUG (g_message ("%s: (%"G_GSIZE_FORMAT") Launching thread %p (%"G_GSIZE_FORMAT")", __func__, mono_native_thread_id_get (), internal, (gsize)internal->tid));
1135 * Wait for the thread to set up its TLS data etc, so
1136 * theres no potential race condition if someone tries
1137 * to look up the data believing the thread has
1141 mono_coop_sem_wait (&start_info->registered, MONO_SEM_FLAGS_NONE);
1143 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));
1145 ret = !start_info->failed;
1148 if (InterlockedDecrement (&start_info->ref) == 0) {
1149 mono_coop_sem_destroy (&start_info->registered);
1150 g_free (start_info);
1157 * mono_thread_new_init:
1160 mono_thread_new_init (intptr_t tid, gpointer stack_start, gpointer func)
1162 if (mono_thread_start_cb) {
1163 mono_thread_start_cb (tid, stack_start, func);
1168 * mono_threads_set_default_stacksize:
1171 mono_threads_set_default_stacksize (guint32 stacksize)
1173 default_stacksize = stacksize;
1177 * mono_threads_get_default_stacksize:
1180 mono_threads_get_default_stacksize (void)
1182 return default_stacksize;
1186 * mono_thread_create_internal:
1188 * ARG should not be a GC reference.
1191 mono_thread_create_internal (MonoDomain *domain, gpointer func, gpointer arg, MonoThreadCreateFlags flags, MonoError *error)
1194 MonoInternalThread *internal;
1199 internal = create_internal_thread_object ();
1201 thread = create_thread_object (domain, internal);
1203 LOCK_THREAD (internal);
1205 res = create_thread (thread, internal, NULL, (MonoThreadStart) func, arg, flags, error);
1207 UNLOCK_THREAD (internal);
1209 return_val_if_nok (error, NULL);
1214 * mono_thread_create:
1217 mono_thread_create (MonoDomain *domain, gpointer func, gpointer arg)
1220 if (!mono_thread_create_checked (domain, func, arg, &error))
1221 mono_error_cleanup (&error);
1225 mono_thread_create_checked (MonoDomain *domain, gpointer func, gpointer arg, MonoError *error)
1227 return (NULL != mono_thread_create_internal (domain, func, arg, MONO_THREAD_CREATE_FLAGS_NONE, error));
1231 mono_thread_attach_full (MonoDomain *domain, gboolean force_attach)
1233 MonoInternalThread *internal;
1235 MonoThreadInfo *info;
1236 MonoNativeThreadId tid;
1238 if (mono_thread_internal_current_is_attached ()) {
1239 if (domain != mono_domain_get ())
1240 mono_domain_set (domain, TRUE);
1241 /* Already attached */
1242 return mono_thread_current ();
1245 info = mono_thread_info_attach ();
1248 tid=mono_native_thread_id_get ();
1250 internal = create_internal_thread_object ();
1252 thread = create_thread_object (domain, internal);
1254 if (!mono_thread_attach_internal (thread, force_attach, TRUE)) {
1255 /* Mono is shutting down, so just wait for the end */
1257 mono_thread_info_sleep (10000, NULL);
1260 THREAD_DEBUG (g_message ("%s: Attached thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, internal->handle));
1262 if (mono_thread_attach_cb)
1263 mono_thread_attach_cb (MONO_NATIVE_THREAD_ID_TO_UINT (tid), info->stack_end);
1265 /* Can happen when we attach the profiler helper thread in order to heapshot. */
1266 if (!mono_thread_info_current ()->tools_thread)
1267 MONO_PROFILER_RAISE (thread_started, (MONO_NATIVE_THREAD_ID_TO_UINT (tid)));
1273 * mono_thread_attach:
1276 mono_thread_attach (MonoDomain *domain)
1278 return mono_thread_attach_full (domain, FALSE);
1282 * mono_thread_detach:
1285 mono_thread_detach (MonoThread *thread)
1288 mono_thread_detach_internal (thread->internal_thread);
1292 * mono_thread_detach_if_exiting:
1294 * Detach the current thread from the runtime if it is exiting, i.e. it is running pthread dtors.
1295 * This should be used at the end of embedding code which calls into managed code, and which
1296 * can be called from pthread dtors, like <code>dealloc:</code> implementations in Objective-C.
1299 mono_thread_detach_if_exiting (void)
1301 if (mono_thread_info_is_exiting ()) {
1302 MonoInternalThread *thread;
1304 thread = mono_thread_internal_current ();
1306 mono_thread_detach_internal (thread);
1307 mono_thread_info_detach ();
1315 mono_thread_internal_current_is_attached (void)
1317 MonoInternalThread *internal;
1319 internal = GET_CURRENT_OBJECT ();
1330 mono_thread_exit (void)
1332 MonoInternalThread *thread = mono_thread_internal_current ();
1334 THREAD_DEBUG (g_message ("%s: mono_thread_exit for %p (%"G_GSIZE_FORMAT")", __func__, thread, (gsize)thread->tid));
1336 mono_thread_detach_internal (thread);
1338 /* we could add a callback here for embedders to use. */
1339 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread))
1340 exit (mono_environment_exitcode_get ());
1342 mono_thread_info_exit (0);
1346 ves_icall_System_Threading_Thread_ConstructInternalThread (MonoThread *this_obj)
1348 MonoInternalThread *internal;
1350 internal = create_internal_thread_object ();
1352 internal->state = ThreadState_Unstarted;
1354 InterlockedCompareExchangePointer ((volatile gpointer *)&this_obj->internal_thread, internal, NULL);
1358 ves_icall_System_Threading_Thread_GetCurrentThread (void)
1360 return mono_thread_current ();
1364 ves_icall_System_Threading_Thread_Thread_internal (MonoThread *this_obj,
1368 MonoInternalThread *internal;
1371 THREAD_DEBUG (g_message("%s: Trying to start a new thread: this (%p) start (%p)", __func__, this_obj, start));
1373 if (!this_obj->internal_thread)
1374 ves_icall_System_Threading_Thread_ConstructInternalThread (this_obj);
1375 internal = this_obj->internal_thread;
1377 LOCK_THREAD (internal);
1379 if ((internal->state & ThreadState_Unstarted) == 0) {
1380 UNLOCK_THREAD (internal);
1381 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has already been started."));
1385 if ((internal->state & ThreadState_Aborted) != 0) {
1386 UNLOCK_THREAD (internal);
1390 res = create_thread (this_obj, internal, start, NULL, NULL, MONO_THREAD_CREATE_FLAGS_NONE, &error);
1392 mono_error_cleanup (&error);
1393 UNLOCK_THREAD (internal);
1397 internal->state &= ~ThreadState_Unstarted;
1399 THREAD_DEBUG (g_message ("%s: Started thread ID %"G_GSIZE_FORMAT" (handle %p)", __func__, tid, thread));
1401 UNLOCK_THREAD (internal);
1402 return internal->handle;
1406 * This is called from the finalizer of the internal thread object.
1409 ves_icall_System_Threading_InternalThread_Thread_free_internal (MonoInternalThread *this_obj)
1411 THREAD_DEBUG (g_message ("%s: Closing thread %p, handle %p", __func__, this, this_obj->handle));
1414 * Since threads keep a reference to their thread object while running, by
1415 * the time this function is called, the thread has already exited/detached,
1416 * i.e. mono_thread_detach_internal () has ran. The exception is during
1417 * shutdown, when mono_thread_detach_internal () can be called after this.
1419 if (this_obj->handle) {
1420 mono_threads_close_thread_handle (this_obj->handle);
1421 this_obj->handle = NULL;
1425 CloseHandle (this_obj->native_handle);
1428 if (this_obj->synch_cs) {
1429 MonoCoopMutex *synch_cs = this_obj->synch_cs;
1430 this_obj->synch_cs = NULL;
1431 mono_coop_mutex_destroy (synch_cs);
1435 if (this_obj->name) {
1436 void *name = this_obj->name;
1437 this_obj->name = NULL;
1443 ves_icall_System_Threading_Thread_Sleep_internal(gint32 ms)
1446 MonoInternalThread *thread = mono_thread_internal_current ();
1448 THREAD_DEBUG (g_message ("%s: Sleeping for %d ms", __func__, ms));
1450 if (mono_thread_current_check_pending_interrupt ())
1454 gboolean alerted = FALSE;
1456 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1458 res = mono_thread_info_sleep (ms, &alerted);
1460 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1463 MonoException* exc = mono_thread_execute_interruption ();
1465 mono_raise_exception (exc);
1467 // FIXME: !MONO_INFINITE_WAIT
1468 if (ms != MONO_INFINITE_WAIT)
1477 void ves_icall_System_Threading_Thread_SpinWait_nop (void)
1482 ves_icall_System_Threading_Thread_GetDomainID (void)
1484 return mono_domain_get()->domain_id;
1488 ves_icall_System_Threading_Thread_Yield (void)
1490 return mono_thread_info_yield ();
1494 * mono_thread_get_name:
1496 * Return the name of the thread. NAME_LEN is set to the length of the name.
1497 * Return NULL if the thread has no name. The returned memory is owned by the
1501 mono_thread_get_name (MonoInternalThread *this_obj, guint32 *name_len)
1505 LOCK_THREAD (this_obj);
1507 if (!this_obj->name) {
1511 *name_len = this_obj->name_len;
1512 res = g_new (gunichar2, this_obj->name_len);
1513 memcpy (res, this_obj->name, sizeof (gunichar2) * this_obj->name_len);
1516 UNLOCK_THREAD (this_obj);
1522 * mono_thread_get_name_utf8:
1523 * \returns the name of the thread in UTF-8.
1524 * Return NULL if the thread has no name.
1525 * The returned memory is owned by the caller.
1528 mono_thread_get_name_utf8 (MonoThread *thread)
1533 MonoInternalThread *internal = thread->internal_thread;
1534 if (internal == NULL)
1537 LOCK_THREAD (internal);
1539 char *tname = g_utf16_to_utf8 (internal->name, internal->name_len, NULL, NULL, NULL);
1541 UNLOCK_THREAD (internal);
1547 * mono_thread_get_managed_id:
1548 * \returns the \c Thread.ManagedThreadId value of \p thread.
1549 * Returns \c -1 if \p thread is NULL.
1552 mono_thread_get_managed_id (MonoThread *thread)
1557 MonoInternalThread *internal = thread->internal_thread;
1558 if (internal == NULL)
1561 int32_t id = internal->managed_id;
1567 ves_icall_System_Threading_Thread_GetName_internal (MonoInternalThread *this_obj)
1572 error_init (&error);
1574 LOCK_THREAD (this_obj);
1576 if (!this_obj->name)
1579 str = mono_string_new_utf16_checked (mono_domain_get (), this_obj->name, this_obj->name_len, &error);
1581 UNLOCK_THREAD (this_obj);
1583 if (mono_error_set_pending_exception (&error))
1590 mono_thread_set_name_internal (MonoInternalThread *this_obj, MonoString *name, gboolean permanent, gboolean reset, MonoError *error)
1592 LOCK_THREAD (this_obj);
1597 this_obj->flags &= ~MONO_THREAD_FLAG_NAME_SET;
1598 } else if (this_obj->flags & MONO_THREAD_FLAG_NAME_SET) {
1599 UNLOCK_THREAD (this_obj);
1601 mono_error_set_invalid_operation (error, "Thread.Name can only be set once.");
1604 if (this_obj->name) {
1605 g_free (this_obj->name);
1606 this_obj->name_len = 0;
1609 this_obj->name = g_memdup (mono_string_chars (name), mono_string_length (name) * sizeof (gunichar2));
1610 this_obj->name_len = mono_string_length (name);
1613 this_obj->flags |= MONO_THREAD_FLAG_NAME_SET;
1616 this_obj->name = NULL;
1619 UNLOCK_THREAD (this_obj);
1621 if (this_obj->name && this_obj->tid) {
1622 char *tname = mono_string_to_utf8_checked (name, error);
1623 return_if_nok (error);
1624 MONO_PROFILER_RAISE (thread_name, (this_obj->tid, tname));
1625 mono_native_thread_set_name (thread_get_tid (this_obj), tname);
1631 ves_icall_System_Threading_Thread_SetName_internal (MonoInternalThread *this_obj, MonoString *name)
1634 mono_thread_set_name_internal (this_obj, name, TRUE, FALSE, &error);
1635 mono_error_set_pending_exception (&error);
1639 * ves_icall_System_Threading_Thread_GetPriority_internal:
1640 * @param this_obj: The MonoInternalThread on which to operate.
1642 * Gets the priority of the given thread.
1643 * @return: The priority of the given thread.
1646 ves_icall_System_Threading_Thread_GetPriority (MonoThread *this_obj)
1649 MonoInternalThread *internal = this_obj->internal_thread;
1651 LOCK_THREAD (internal);
1652 priority = internal->priority;
1653 UNLOCK_THREAD (internal);
1659 * ves_icall_System_Threading_Thread_SetPriority_internal:
1660 * @param this_obj: The MonoInternalThread on which to operate.
1661 * @param priority: The priority to set.
1663 * Sets the priority of the given thread.
1666 ves_icall_System_Threading_Thread_SetPriority (MonoThread *this_obj, int priority)
1668 MonoInternalThread *internal = this_obj->internal_thread;
1670 LOCK_THREAD (internal);
1671 internal->priority = priority;
1672 if (internal->thread_info != NULL)
1673 mono_thread_internal_set_priority (internal, priority);
1674 UNLOCK_THREAD (internal);
1677 /* If the array is already in the requested domain, we just return it,
1678 otherwise we return a copy in that domain. */
1680 byte_array_to_domain (MonoArray *arr, MonoDomain *domain, MonoError *error)
1688 if (mono_object_domain (arr) == domain)
1691 copy = mono_array_new_checked (domain, mono_defaults.byte_class, arr->max_length, error);
1692 memmove (mono_array_addr (copy, guint8, 0), mono_array_addr (arr, guint8, 0), arr->max_length);
1697 ves_icall_System_Threading_Thread_ByteArrayToRootDomain (MonoArray *arr)
1700 MonoArray *result = byte_array_to_domain (arr, mono_get_root_domain (), &error);
1701 mono_error_set_pending_exception (&error);
1706 ves_icall_System_Threading_Thread_ByteArrayToCurrentDomain (MonoArray *arr)
1709 MonoArray *result = byte_array_to_domain (arr, mono_domain_get (), &error);
1710 mono_error_set_pending_exception (&error);
1715 * mono_thread_current:
1718 mono_thread_current (void)
1720 MonoDomain *domain = mono_domain_get ();
1721 MonoInternalThread *internal = mono_thread_internal_current ();
1722 MonoThread **current_thread_ptr;
1724 g_assert (internal);
1725 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1727 if (!*current_thread_ptr) {
1728 g_assert (domain != mono_get_root_domain ());
1729 *current_thread_ptr = create_thread_object (domain, internal);
1731 return *current_thread_ptr;
1734 /* Return the thread object belonging to INTERNAL in the current domain */
1736 mono_thread_current_for_thread (MonoInternalThread *internal)
1738 MonoDomain *domain = mono_domain_get ();
1739 MonoThread **current_thread_ptr;
1741 g_assert (internal);
1742 current_thread_ptr = get_current_thread_ptr_for_domain (domain, internal);
1744 if (!*current_thread_ptr) {
1745 g_assert (domain != mono_get_root_domain ());
1746 *current_thread_ptr = create_thread_object (domain, internal);
1748 return *current_thread_ptr;
1752 mono_thread_internal_current (void)
1754 MonoInternalThread *res = GET_CURRENT_OBJECT ();
1755 THREAD_DEBUG (g_message ("%s: returning %p", __func__, res));
1759 static MonoThreadInfoWaitRet
1760 mono_join_uninterrupted (MonoThreadHandle* thread_to_join, gint32 ms, MonoError *error)
1763 MonoThreadInfoWaitRet ret;
1770 start = (ms == -1) ? 0 : mono_msec_ticks ();
1773 ret = mono_thread_info_wait_one_handle (thread_to_join, ms, TRUE);
1776 if (ret != MONO_THREAD_INFO_WAIT_RET_ALERTED)
1779 exc = mono_thread_execute_interruption ();
1781 mono_error_set_exception_instance (error, exc);
1788 /* Re-calculate ms according to the time passed */
1789 diff_ms = (gint32)(mono_msec_ticks () - start);
1790 if (diff_ms >= ms) {
1791 ret = MONO_THREAD_INFO_WAIT_RET_TIMEOUT;
1794 wait = ms - diff_ms;
1801 ves_icall_System_Threading_Thread_Join_internal (MonoThread *this_obj, int ms)
1803 MonoInternalThread *thread = this_obj->internal_thread;
1804 MonoThreadHandle *handle = thread->handle;
1805 MonoInternalThread *cur_thread = mono_thread_internal_current ();
1809 if (mono_thread_current_check_pending_interrupt ())
1812 LOCK_THREAD (thread);
1814 if ((thread->state & ThreadState_Unstarted) != 0) {
1815 UNLOCK_THREAD (thread);
1817 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started."));
1821 MonoNativeThreadId tid = thread_get_tid (thread);
1823 UNLOCK_THREAD (thread);
1826 ms = MONO_INFINITE_WAIT;
1827 THREAD_DEBUG (g_message ("%s: joining thread handle %p, %d ms", __func__, handle, ms));
1829 mono_thread_set_state (cur_thread, ThreadState_WaitSleepJoin);
1831 ret = mono_join_uninterrupted (handle, ms, &error);
1833 mono_thread_clr_state (cur_thread, ThreadState_WaitSleepJoin);
1835 mono_error_set_pending_exception (&error);
1837 if (ret == MONO_THREAD_INFO_WAIT_RET_SUCCESS_0) {
1838 THREAD_DEBUG (g_message ("%s: join successful", __func__));
1841 /* TODO: Do this on Unix platforms as well. See PR #5454 for context. */
1842 /* Wait for the thread to really exit */
1844 /* This shouldn't block */
1845 mono_threads_join_lock ();
1846 mono_native_thread_join (tid);
1847 mono_threads_join_unlock ();
1854 THREAD_DEBUG (g_message ("%s: join failed", __func__));
1859 #define MANAGED_WAIT_FAILED 0x7fffffff
1862 map_native_wait_result_to_managed (MonoW32HandleWaitRet val, gsize numobjects)
1864 if (val >= MONO_W32HANDLE_WAIT_RET_SUCCESS_0 && val < MONO_W32HANDLE_WAIT_RET_SUCCESS_0 + numobjects) {
1865 return WAIT_OBJECT_0 + (val - MONO_W32HANDLE_WAIT_RET_SUCCESS_0);
1866 } else if (val >= MONO_W32HANDLE_WAIT_RET_ABANDONED_0 && val < MONO_W32HANDLE_WAIT_RET_ABANDONED_0 + numobjects) {
1867 return WAIT_ABANDONED_0 + (val - MONO_W32HANDLE_WAIT_RET_ABANDONED_0);
1868 } else if (val == MONO_W32HANDLE_WAIT_RET_ALERTED) {
1869 return WAIT_IO_COMPLETION;
1870 } else if (val == MONO_W32HANDLE_WAIT_RET_TIMEOUT) {
1871 return WAIT_TIMEOUT;
1872 } else if (val == MONO_W32HANDLE_WAIT_RET_FAILED) {
1873 /* WAIT_FAILED in waithandle.cs is different from WAIT_FAILED in Win32 API */
1874 return MANAGED_WAIT_FAILED;
1876 g_error ("%s: unknown val value %d", __func__, val);
1881 ves_icall_System_Threading_WaitHandle_Wait_internal (gpointer *handles, gint32 numhandles, MonoBoolean waitall, gint32 timeout, MonoError *error)
1883 MonoW32HandleWaitRet ret;
1884 MonoInternalThread *thread;
1887 guint32 timeoutLeft;
1889 /* Do this WaitSleepJoin check before creating objects */
1890 if (mono_thread_current_check_pending_interrupt ())
1891 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1893 thread = mono_thread_internal_current ();
1895 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1898 timeout = MONO_INFINITE_WAIT;
1899 if (timeout != MONO_INFINITE_WAIT)
1900 start = mono_msec_ticks ();
1902 timeoutLeft = timeout;
1907 if (numhandles != 1)
1908 ret = mono_w32handle_convert_wait_ret (mono_win32_wait_for_multiple_objects_ex(numhandles, handles, waitall, timeoutLeft, TRUE), numhandles);
1910 ret = mono_w32handle_convert_wait_ret (mono_win32_wait_for_single_object_ex (handles [0], timeoutLeft, TRUE), 1);
1912 /* mono_w32handle_wait_multiple optimizes the case for numhandles == 1 */
1913 ret = mono_w32handle_wait_multiple (handles, numhandles, waitall, timeoutLeft, TRUE);
1914 #endif /* HOST_WIN32 */
1917 if (ret != MONO_W32HANDLE_WAIT_RET_ALERTED)
1920 exc = mono_thread_execute_interruption ();
1922 mono_error_set_exception_instance (error, exc);
1926 if (timeout != MONO_INFINITE_WAIT) {
1929 elapsed = mono_msec_ticks () - start;
1930 if (elapsed >= timeout) {
1931 ret = MONO_W32HANDLE_WAIT_RET_TIMEOUT;
1935 timeoutLeft = timeout - elapsed;
1939 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1941 return map_native_wait_result_to_managed (ret, numhandles);
1945 ves_icall_System_Threading_WaitHandle_SignalAndWait_Internal (gpointer toSignal, gpointer toWait, gint32 ms, MonoError *error)
1947 MonoW32HandleWaitRet ret;
1948 MonoInternalThread *thread = mono_thread_internal_current ();
1951 ms = MONO_INFINITE_WAIT;
1953 if (mono_thread_current_check_pending_interrupt ())
1954 return map_native_wait_result_to_managed (MONO_W32HANDLE_WAIT_RET_FAILED, 0);
1956 mono_thread_set_state (thread, ThreadState_WaitSleepJoin);
1960 ret = mono_w32handle_convert_wait_ret (mono_win32_signal_object_and_wait (toSignal, toWait, ms, TRUE), 1);
1962 ret = mono_w32handle_signal_and_wait (toSignal, toWait, ms, TRUE);
1966 mono_thread_clr_state (thread, ThreadState_WaitSleepJoin);
1968 return map_native_wait_result_to_managed (ret, 1);
1971 gint32 ves_icall_System_Threading_Interlocked_Increment_Int (gint32 *location)
1973 return InterlockedIncrement (location);
1976 gint64 ves_icall_System_Threading_Interlocked_Increment_Long (gint64 *location)
1978 #if SIZEOF_VOID_P == 4
1979 if (G_UNLIKELY ((size_t)location & 0x7)) {
1981 mono_interlocked_lock ();
1984 mono_interlocked_unlock ();
1988 return InterlockedIncrement64 (location);
1991 gint32 ves_icall_System_Threading_Interlocked_Decrement_Int (gint32 *location)
1993 return InterlockedDecrement(location);
1996 gint64 ves_icall_System_Threading_Interlocked_Decrement_Long (gint64 * location)
1998 #if SIZEOF_VOID_P == 4
1999 if (G_UNLIKELY ((size_t)location & 0x7)) {
2001 mono_interlocked_lock ();
2004 mono_interlocked_unlock ();
2008 return InterlockedDecrement64 (location);
2011 gint32 ves_icall_System_Threading_Interlocked_Exchange_Int (gint32 *location, gint32 value)
2013 return InterlockedExchange(location, value);
2016 MonoObject * ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject **location, MonoObject *value)
2019 res = (MonoObject *) InterlockedExchangePointer((gpointer *) location, value);
2020 mono_gc_wbarrier_generic_nostore (location);
2024 gpointer ves_icall_System_Threading_Interlocked_Exchange_IntPtr (gpointer *location, gpointer value)
2026 return InterlockedExchangePointer(location, value);
2029 gfloat ves_icall_System_Threading_Interlocked_Exchange_Single (gfloat *location, gfloat value)
2031 IntFloatUnion val, ret;
2034 ret.ival = InterlockedExchange((gint32 *) location, val.ival);
2040 ves_icall_System_Threading_Interlocked_Exchange_Long (gint64 *location, gint64 value)
2042 #if SIZEOF_VOID_P == 4
2043 if (G_UNLIKELY ((size_t)location & 0x7)) {
2045 mono_interlocked_lock ();
2048 mono_interlocked_unlock ();
2052 return InterlockedExchange64 (location, value);
2056 ves_icall_System_Threading_Interlocked_Exchange_Double (gdouble *location, gdouble value)
2058 LongDoubleUnion val, ret;
2061 ret.ival = (gint64)InterlockedExchange64((gint64 *) location, val.ival);
2066 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand)
2068 return InterlockedCompareExchange(location, value, comparand);
2071 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
2073 gint32 r = InterlockedCompareExchange(location, value, comparand);
2074 *success = r == comparand;
2078 MonoObject * ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject **location, MonoObject *value, MonoObject *comparand)
2081 res = (MonoObject *) InterlockedCompareExchangePointer((gpointer *) location, value, comparand);
2082 mono_gc_wbarrier_generic_nostore (location);
2086 gpointer ves_icall_System_Threading_Interlocked_CompareExchange_IntPtr(gpointer *location, gpointer value, gpointer comparand)
2088 return InterlockedCompareExchangePointer(location, value, comparand);
2091 gfloat ves_icall_System_Threading_Interlocked_CompareExchange_Single (gfloat *location, gfloat value, gfloat comparand)
2093 IntFloatUnion val, ret, cmp;
2096 cmp.fval = comparand;
2097 ret.ival = InterlockedCompareExchange((gint32 *) location, val.ival, cmp.ival);
2103 ves_icall_System_Threading_Interlocked_CompareExchange_Double (gdouble *location, gdouble value, gdouble comparand)
2105 #if SIZEOF_VOID_P == 8
2106 LongDoubleUnion val, comp, ret;
2109 comp.fval = comparand;
2110 ret.ival = (gint64)InterlockedCompareExchangePointer((gpointer *) location, (gpointer)val.ival, (gpointer)comp.ival);
2116 mono_interlocked_lock ();
2118 if (old == comparand)
2120 mono_interlocked_unlock ();
2127 ves_icall_System_Threading_Interlocked_CompareExchange_Long (gint64 *location, gint64 value, gint64 comparand)
2129 #if SIZEOF_VOID_P == 4
2130 if (G_UNLIKELY ((size_t)location & 0x7)) {
2132 mono_interlocked_lock ();
2134 if (old == comparand)
2136 mono_interlocked_unlock ();
2140 return InterlockedCompareExchange64 (location, value, comparand);
2144 ves_icall_System_Threading_Interlocked_CompareExchange_T (MonoObject **location, MonoObject *value, MonoObject *comparand)
2147 res = (MonoObject *)InterlockedCompareExchangePointer ((volatile gpointer *)location, value, comparand);
2148 mono_gc_wbarrier_generic_nostore (location);
2153 ves_icall_System_Threading_Interlocked_Exchange_T (MonoObject **location, MonoObject *value)
2156 MONO_CHECK_NULL (location, NULL);
2157 res = (MonoObject *)InterlockedExchangePointer ((volatile gpointer *)location, value);
2158 mono_gc_wbarrier_generic_nostore (location);
2163 ves_icall_System_Threading_Interlocked_Add_Int (gint32 *location, gint32 value)
2165 return InterlockedAdd (location, value);
2169 ves_icall_System_Threading_Interlocked_Add_Long (gint64 *location, gint64 value)
2171 #if SIZEOF_VOID_P == 4
2172 if (G_UNLIKELY ((size_t)location & 0x7)) {
2174 mono_interlocked_lock ();
2177 mono_interlocked_unlock ();
2181 return InterlockedAdd64 (location, value);
2185 ves_icall_System_Threading_Interlocked_Read_Long (gint64 *location)
2187 #if SIZEOF_VOID_P == 4
2188 if (G_UNLIKELY ((size_t)location & 0x7)) {
2190 mono_interlocked_lock ();
2192 mono_interlocked_unlock ();
2196 return InterlockedRead64 (location);
2200 ves_icall_System_Threading_Thread_MemoryBarrier (void)
2202 mono_memory_barrier ();
2206 ves_icall_System_Threading_Thread_ClrState (MonoInternalThread* this_obj, guint32 state)
2208 mono_thread_clr_state (this_obj, (MonoThreadState)state);
2210 if (state & ThreadState_Background) {
2211 /* If the thread changes the background mode, the main thread has to
2212 * be notified, since it has to rebuild the list of threads to
2215 mono_os_event_set (&background_change_event);
2220 ves_icall_System_Threading_Thread_SetState (MonoInternalThread* this_obj, guint32 state)
2222 mono_thread_set_state (this_obj, (MonoThreadState)state);
2224 if (state & ThreadState_Background) {
2225 /* If the thread changes the background mode, the main thread has to
2226 * be notified, since it has to rebuild the list of threads to
2229 mono_os_event_set (&background_change_event);
2234 ves_icall_System_Threading_Thread_GetState (MonoInternalThread* this_obj)
2238 LOCK_THREAD (this_obj);
2240 state = this_obj->state;
2242 UNLOCK_THREAD (this_obj);
2247 void ves_icall_System_Threading_Thread_Interrupt_internal (MonoThread *this_obj)
2249 MonoInternalThread *current;
2251 MonoInternalThread *thread = this_obj->internal_thread;
2253 LOCK_THREAD (thread);
2255 current = mono_thread_internal_current ();
2257 thread->thread_interrupt_requested = TRUE;
2258 throw_ = current != thread && (thread->state & ThreadState_WaitSleepJoin);
2260 UNLOCK_THREAD (thread);
2263 async_abort_internal (thread, FALSE);
2268 * mono_thread_current_check_pending_interrupt:
2269 * Checks if there's a interruption request and set the pending exception if so.
2270 * \returns true if a pending exception was set
2273 mono_thread_current_check_pending_interrupt (void)
2275 MonoInternalThread *thread = mono_thread_internal_current ();
2276 gboolean throw_ = FALSE;
2278 LOCK_THREAD (thread);
2280 if (thread->thread_interrupt_requested) {
2282 thread->thread_interrupt_requested = FALSE;
2285 UNLOCK_THREAD (thread);
2288 mono_set_pending_exception (mono_get_exception_thread_interrupted ());
2293 request_thread_abort (MonoInternalThread *thread, MonoObject *state, gboolean appdomain_unload)
2295 LOCK_THREAD (thread);
2297 if (thread->state & (ThreadState_AbortRequested | ThreadState_Stopped))
2299 UNLOCK_THREAD (thread);
2303 if ((thread->state & ThreadState_Unstarted) != 0) {
2304 thread->state |= ThreadState_Aborted;
2305 UNLOCK_THREAD (thread);
2309 thread->state |= ThreadState_AbortRequested;
2310 if (appdomain_unload)
2311 thread->flags |= MONO_THREAD_FLAG_APPDOMAIN_ABORT;
2313 thread->flags &= ~MONO_THREAD_FLAG_APPDOMAIN_ABORT;
2315 if (thread->abort_state_handle)
2316 mono_gchandle_free (thread->abort_state_handle);
2318 thread->abort_state_handle = mono_gchandle_new (state, FALSE);
2319 g_assert (thread->abort_state_handle);
2321 thread->abort_state_handle = 0;
2323 thread->abort_exc = NULL;
2325 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));
2327 /* During shutdown, we can't wait for other threads */
2329 /* Make sure the thread is awake */
2330 mono_thread_resume (thread);
2332 UNLOCK_THREAD (thread);
2337 ves_icall_System_Threading_Thread_Abort (MonoInternalThread *thread, MonoObject *state)
2339 if (!request_thread_abort (thread, state, FALSE))
2342 if (thread == mono_thread_internal_current ()) {
2344 self_abort_internal (&error);
2345 mono_error_set_pending_exception (&error);
2347 async_abort_internal (thread, TRUE);
2352 * mono_thread_internal_abort:
2353 * Request thread \p thread to be aborted.
2354 * \p thread MUST NOT be the current thread.
2357 mono_thread_internal_abort (MonoInternalThread *thread, gboolean appdomain_unload)
2359 g_assert (thread != mono_thread_internal_current ());
2361 if (!request_thread_abort (thread, NULL, appdomain_unload))
2363 async_abort_internal (thread, TRUE);
2367 ves_icall_System_Threading_Thread_ResetAbort (MonoThread *this_obj)
2369 MonoInternalThread *thread = mono_thread_internal_current ();
2370 gboolean was_aborting, is_domain_abort;
2372 LOCK_THREAD (thread);
2373 was_aborting = thread->state & ThreadState_AbortRequested;
2374 is_domain_abort = thread->flags & MONO_THREAD_FLAG_APPDOMAIN_ABORT;
2376 if (was_aborting && !is_domain_abort)
2377 thread->state &= ~ThreadState_AbortRequested;
2378 UNLOCK_THREAD (thread);
2380 if (!was_aborting) {
2381 const char *msg = "Unable to reset abort because no abort was requested";
2382 mono_set_pending_exception (mono_get_exception_thread_state (msg));
2384 } else if (is_domain_abort) {
2385 /* Silently ignore abort resets in unloading appdomains */
2389 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2390 thread->abort_exc = NULL;
2391 if (thread->abort_state_handle) {
2392 mono_gchandle_free (thread->abort_state_handle);
2393 /* This is actually not necessary - the handle
2394 only counts if the exception is set */
2395 thread->abort_state_handle = 0;
2400 mono_thread_internal_reset_abort (MonoInternalThread *thread)
2402 LOCK_THREAD (thread);
2404 thread->state &= ~ThreadState_AbortRequested;
2406 if (thread->abort_exc) {
2407 mono_get_eh_callbacks ()->mono_clear_abort_threshold ();
2408 thread->abort_exc = NULL;
2409 if (thread->abort_state_handle) {
2410 mono_gchandle_free (thread->abort_state_handle);
2411 /* This is actually not necessary - the handle
2412 only counts if the exception is set */
2413 thread->abort_state_handle = 0;
2417 UNLOCK_THREAD (thread);
2421 ves_icall_System_Threading_Thread_GetAbortExceptionState (MonoThread *this_obj)
2424 MonoInternalThread *thread = this_obj->internal_thread;
2425 MonoObject *state, *deserialized = NULL;
2428 if (!thread->abort_state_handle)
2431 state = mono_gchandle_get_target (thread->abort_state_handle);
2434 domain = mono_domain_get ();
2435 if (mono_object_domain (state) == domain)
2438 deserialized = mono_object_xdomain_representation (state, domain, &error);
2440 if (!deserialized) {
2441 MonoException *invalid_op_exc = mono_get_exception_invalid_operation ("Thread.ExceptionState cannot access an ExceptionState from a different AppDomain");
2442 if (!is_ok (&error)) {
2443 MonoObject *exc = (MonoObject*)mono_error_convert_to_exception (&error);
2444 MONO_OBJECT_SETREF (invalid_op_exc, inner_ex, exc);
2446 mono_set_pending_exception (invalid_op_exc);
2450 return deserialized;
2454 mono_thread_suspend (MonoInternalThread *thread)
2456 LOCK_THREAD (thread);
2458 if (thread->state & (ThreadState_Unstarted | ThreadState_Aborted | ThreadState_Stopped))
2460 UNLOCK_THREAD (thread);
2464 if (thread->state & (ThreadState_Suspended | ThreadState_SuspendRequested | ThreadState_AbortRequested))
2466 UNLOCK_THREAD (thread);
2470 thread->state |= ThreadState_SuspendRequested;
2471 mono_os_event_reset (thread->suspended);
2473 if (thread == mono_thread_internal_current ()) {
2474 /* calls UNLOCK_THREAD (thread) */
2475 self_suspend_internal ();
2477 /* calls UNLOCK_THREAD (thread) */
2478 async_suspend_internal (thread, FALSE);
2485 ves_icall_System_Threading_Thread_Suspend (MonoThread *this_obj)
2487 if (!mono_thread_suspend (this_obj->internal_thread)) {
2488 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2493 /* LOCKING: LOCK_THREAD(thread) must be held */
2495 mono_thread_resume (MonoInternalThread *thread)
2497 if ((thread->state & ThreadState_SuspendRequested) != 0) {
2498 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (1) thread %p\n", thread_get_tid (thread));
2499 thread->state &= ~ThreadState_SuspendRequested;
2500 mono_os_event_set (thread->suspended);
2504 if ((thread->state & ThreadState_Suspended) == 0 ||
2505 (thread->state & ThreadState_Unstarted) != 0 ||
2506 (thread->state & ThreadState_Aborted) != 0 ||
2507 (thread->state & ThreadState_Stopped) != 0)
2509 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (2) thread %p\n", thread_get_tid (thread));
2513 // MOSTLY_ASYNC_SAFE_PRINTF ("RESUME (3) thread %p\n", thread_get_tid (thread));
2515 mono_os_event_set (thread->suspended);
2517 if (!thread->self_suspended) {
2518 UNLOCK_THREAD (thread);
2520 /* Awake the thread */
2521 if (!mono_thread_info_resume (thread_get_tid (thread)))
2524 LOCK_THREAD (thread);
2527 thread->state &= ~ThreadState_Suspended;
2533 ves_icall_System_Threading_Thread_Resume (MonoThread *thread)
2535 if (!thread->internal_thread) {
2536 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2538 LOCK_THREAD (thread->internal_thread);
2539 if (!mono_thread_resume (thread->internal_thread))
2540 mono_set_pending_exception (mono_get_exception_thread_state ("Thread has not been started, or is dead."));
2541 UNLOCK_THREAD (thread->internal_thread);
2546 mono_threads_is_critical_method (MonoMethod *method)
2548 switch (method->wrapper_type) {
2549 case MONO_WRAPPER_RUNTIME_INVOKE:
2550 case MONO_WRAPPER_XDOMAIN_INVOKE:
2551 case MONO_WRAPPER_XDOMAIN_DISPATCH:
2558 find_wrapper (MonoMethod *m, gint no, gint ilo, gboolean managed, gpointer data)
2563 if (mono_threads_is_critical_method (m)) {
2564 *((gboolean*)data) = TRUE;
2571 is_running_protected_wrapper (void)
2573 gboolean found = FALSE;
2574 mono_stack_walk (find_wrapper, &found);
2582 mono_thread_stop (MonoThread *thread)
2584 MonoInternalThread *internal = thread->internal_thread;
2586 if (!request_thread_abort (internal, NULL, FALSE))
2589 if (internal == mono_thread_internal_current ()) {
2591 self_abort_internal (&error);
2593 This function is part of the embeding API and has no way to return the exception
2594 to be thrown. So what we do is keep the old behavior and raise the exception.
2596 mono_error_raise_exception (&error); /* OK to throw, see note */
2598 async_abort_internal (internal, TRUE);
2603 ves_icall_System_Threading_Thread_VolatileRead1 (void *ptr)
2605 gint8 tmp = *(volatile gint8 *)ptr;
2606 mono_memory_barrier ();
2611 ves_icall_System_Threading_Thread_VolatileRead2 (void *ptr)
2613 gint16 tmp = *(volatile gint16 *)ptr;
2614 mono_memory_barrier ();
2619 ves_icall_System_Threading_Thread_VolatileRead4 (void *ptr)
2621 gint32 tmp = *(volatile gint32 *)ptr;
2622 mono_memory_barrier ();
2627 ves_icall_System_Threading_Thread_VolatileRead8 (void *ptr)
2629 gint64 tmp = *(volatile gint64 *)ptr;
2630 mono_memory_barrier ();
2635 ves_icall_System_Threading_Thread_VolatileReadIntPtr (void *ptr)
2637 volatile void *tmp = *(volatile void **)ptr;
2638 mono_memory_barrier ();
2639 return (void *) tmp;
2643 ves_icall_System_Threading_Thread_VolatileReadObject (void *ptr)
2645 volatile MonoObject *tmp = *(volatile MonoObject **)ptr;
2646 mono_memory_barrier ();
2647 return (MonoObject *) tmp;
2651 ves_icall_System_Threading_Thread_VolatileReadDouble (void *ptr)
2653 double tmp = *(volatile double *)ptr;
2654 mono_memory_barrier ();
2659 ves_icall_System_Threading_Thread_VolatileReadFloat (void *ptr)
2661 float tmp = *(volatile float *)ptr;
2662 mono_memory_barrier ();
2667 ves_icall_System_Threading_Volatile_Read1 (void *ptr)
2669 return InterlockedRead8 ((volatile gint8 *)ptr);
2673 ves_icall_System_Threading_Volatile_Read2 (void *ptr)
2675 return InterlockedRead16 ((volatile gint16 *)ptr);
2679 ves_icall_System_Threading_Volatile_Read4 (void *ptr)
2681 return InterlockedRead ((volatile gint32 *)ptr);
2685 ves_icall_System_Threading_Volatile_Read8 (void *ptr)
2687 #if SIZEOF_VOID_P == 4
2688 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2690 mono_interlocked_lock ();
2691 val = *(gint64*)ptr;
2692 mono_interlocked_unlock ();
2696 return InterlockedRead64 ((volatile gint64 *)ptr);
2700 ves_icall_System_Threading_Volatile_ReadIntPtr (void *ptr)
2702 return InterlockedReadPointer ((volatile gpointer *)ptr);
2706 ves_icall_System_Threading_Volatile_ReadDouble (void *ptr)
2710 #if SIZEOF_VOID_P == 4
2711 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2713 mono_interlocked_lock ();
2714 val = *(double*)ptr;
2715 mono_interlocked_unlock ();
2720 u.ival = InterlockedRead64 ((volatile gint64 *)ptr);
2726 ves_icall_System_Threading_Volatile_ReadFloat (void *ptr)
2730 u.ival = InterlockedRead ((volatile gint32 *)ptr);
2736 ves_icall_System_Threading_Volatile_Read_T (void *ptr)
2738 return (MonoObject *)InterlockedReadPointer ((volatile gpointer *)ptr);
2742 ves_icall_System_Threading_Thread_VolatileWrite1 (void *ptr, gint8 value)
2744 mono_memory_barrier ();
2745 *(volatile gint8 *)ptr = value;
2749 ves_icall_System_Threading_Thread_VolatileWrite2 (void *ptr, gint16 value)
2751 mono_memory_barrier ();
2752 *(volatile gint16 *)ptr = value;
2756 ves_icall_System_Threading_Thread_VolatileWrite4 (void *ptr, gint32 value)
2758 mono_memory_barrier ();
2759 *(volatile gint32 *)ptr = value;
2763 ves_icall_System_Threading_Thread_VolatileWrite8 (void *ptr, gint64 value)
2765 mono_memory_barrier ();
2766 *(volatile gint64 *)ptr = value;
2770 ves_icall_System_Threading_Thread_VolatileWriteIntPtr (void *ptr, void *value)
2772 mono_memory_barrier ();
2773 *(volatile void **)ptr = value;
2777 ves_icall_System_Threading_Thread_VolatileWriteObject (void *ptr, MonoObject *value)
2779 mono_memory_barrier ();
2780 mono_gc_wbarrier_generic_store (ptr, value);
2784 ves_icall_System_Threading_Thread_VolatileWriteDouble (void *ptr, double value)
2786 mono_memory_barrier ();
2787 *(volatile double *)ptr = value;
2791 ves_icall_System_Threading_Thread_VolatileWriteFloat (void *ptr, float value)
2793 mono_memory_barrier ();
2794 *(volatile float *)ptr = value;
2798 ves_icall_System_Threading_Volatile_Write1 (void *ptr, gint8 value)
2800 InterlockedWrite8 ((volatile gint8 *)ptr, value);
2804 ves_icall_System_Threading_Volatile_Write2 (void *ptr, gint16 value)
2806 InterlockedWrite16 ((volatile gint16 *)ptr, value);
2810 ves_icall_System_Threading_Volatile_Write4 (void *ptr, gint32 value)
2812 InterlockedWrite ((volatile gint32 *)ptr, value);
2816 ves_icall_System_Threading_Volatile_Write8 (void *ptr, gint64 value)
2818 #if SIZEOF_VOID_P == 4
2819 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2820 mono_interlocked_lock ();
2821 *(gint64*)ptr = value;
2822 mono_interlocked_unlock ();
2827 InterlockedWrite64 ((volatile gint64 *)ptr, value);
2831 ves_icall_System_Threading_Volatile_WriteIntPtr (void *ptr, void *value)
2833 InterlockedWritePointer ((volatile gpointer *)ptr, value);
2837 ves_icall_System_Threading_Volatile_WriteDouble (void *ptr, double value)
2841 #if SIZEOF_VOID_P == 4
2842 if (G_UNLIKELY ((size_t)ptr & 0x7)) {
2843 mono_interlocked_lock ();
2844 *(double*)ptr = value;
2845 mono_interlocked_unlock ();
2852 InterlockedWrite64 ((volatile gint64 *)ptr, u.ival);
2856 ves_icall_System_Threading_Volatile_WriteFloat (void *ptr, float value)
2862 InterlockedWrite ((volatile gint32 *)ptr, u.ival);
2866 ves_icall_System_Threading_Volatile_Write_T (void *ptr, MonoObject *value)
2868 mono_gc_wbarrier_generic_store_atomic (ptr, value);
2872 free_context (void *user_data)
2874 ContextStaticData *data = user_data;
2876 mono_threads_lock ();
2879 * There is no guarantee that, by the point this reference queue callback
2880 * has been invoked, the GC handle associated with the object will fail to
2881 * resolve as one might expect. So if we don't free and remove the GC
2882 * handle here, free_context_static_data_helper () could end up resolving
2883 * a GC handle to an actually-dead context which would contain a pointer
2884 * to an already-freed static data segment, resulting in a crash when
2887 g_hash_table_remove (contexts, GUINT_TO_POINTER (data->gc_handle));
2889 mono_threads_unlock ();
2891 mono_gchandle_free (data->gc_handle);
2892 mono_free_static_data (data->static_data);
2897 mono_threads_register_app_context (MonoAppContext *ctx, MonoError *error)
2900 mono_threads_lock ();
2902 //g_print ("Registering context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2905 contexts = g_hash_table_new (NULL, NULL);
2908 context_queue = mono_gc_reference_queue_new (free_context);
2910 gpointer gch = GUINT_TO_POINTER (mono_gchandle_new_weakref (&ctx->obj, FALSE));
2911 g_hash_table_insert (contexts, gch, gch);
2914 * We use this intermediate structure to contain a duplicate pointer to
2915 * the static data because we can't rely on being able to resolve the GC
2916 * handle in the reference queue callback.
2918 ContextStaticData *data = g_new0 (ContextStaticData, 1);
2919 data->gc_handle = GPOINTER_TO_UINT (gch);
2922 context_adjust_static_data (ctx);
2923 mono_gc_reference_queue_add (context_queue, &ctx->obj, data);
2925 mono_threads_unlock ();
2927 MONO_PROFILER_RAISE (context_loaded, (ctx));
2931 ves_icall_System_Runtime_Remoting_Contexts_Context_RegisterContext (MonoAppContextHandle ctx, MonoError *error)
2934 mono_threads_register_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_register_app_context */
2938 mono_threads_release_app_context (MonoAppContext* ctx, MonoError *error)
2941 * NOTE: Since finalizers are unreliable for the purposes of ensuring
2942 * cleanup in exceptional circumstances, we don't actually do any
2943 * cleanup work here. We instead do this via a reference queue.
2946 //g_print ("Releasing context %d in domain %d\n", ctx->context_id, ctx->domain_id);
2948 MONO_PROFILER_RAISE (context_unloaded, (ctx));
2952 ves_icall_System_Runtime_Remoting_Contexts_Context_ReleaseContext (MonoAppContextHandle ctx, MonoError *error)
2955 mono_threads_release_app_context (MONO_HANDLE_RAW (ctx), error); /* FIXME use handles in mono_threads_release_app_context */
2958 void mono_thread_init (MonoThreadStartCB start_cb,
2959 MonoThreadAttachCB attach_cb)
2961 mono_coop_mutex_init_recursive (&threads_mutex);
2963 mono_os_mutex_init_recursive(&interlocked_mutex);
2964 mono_os_mutex_init_recursive(&joinable_threads_mutex);
2966 mono_os_event_init (&background_change_event, FALSE);
2968 mono_init_static_data_info (&thread_static_info);
2969 mono_init_static_data_info (&context_static_info);
2971 mono_thread_start_cb = start_cb;
2972 mono_thread_attach_cb = attach_cb;
2976 thread_attach (MonoThreadInfo *info)
2978 return mono_gc_thread_attach (info);
2982 thread_detach (MonoThreadInfo *info)
2984 MonoInternalThread *internal;
2987 /* If a delegate is passed to native code and invoked on a thread we dont
2988 * know about, marshal will register it with mono_threads_attach_coop, but
2989 * we have no way of knowing when that thread goes away. SGen has a TSD
2990 * so we assume that if the domain is still registered, we can detach
2995 if (!mono_thread_info_try_get_internal_thread_gchandle (info, &gchandle))
2998 internal = (MonoInternalThread*) mono_gchandle_get_target (gchandle);
2999 g_assert (internal);
3001 mono_gchandle_free (gchandle);
3003 mono_thread_detach_internal (internal);
3007 thread_detach_with_lock (MonoThreadInfo *info)
3009 return mono_gc_thread_detach_with_lock (info);
3013 thread_in_critical_region (MonoThreadInfo *info)
3015 return mono_gc_thread_in_critical_region (info);
3019 ip_in_critical_region (MonoDomain *domain, gpointer ip)
3025 * We pass false for 'try_aot' so this becomes async safe.
3026 * It won't find aot methods whose jit info is not yet loaded,
3027 * so we preload their jit info in the JIT.
3029 ji = mono_jit_info_table_find_internal (domain, ip, FALSE, FALSE);
3033 method = mono_jit_info_get_method (ji);
3036 return mono_gc_is_critical_method (method);
3040 mono_thread_callbacks_init (void)
3042 MonoThreadInfoCallbacks cb;
3044 memset (&cb, 0, sizeof(cb));
3045 cb.thread_attach = thread_attach;
3046 cb.thread_detach = thread_detach;
3047 cb.thread_detach_with_lock = thread_detach_with_lock;
3048 cb.ip_in_critical_region = ip_in_critical_region;
3049 cb.thread_in_critical_region = thread_in_critical_region;
3050 mono_thread_info_callbacks_init (&cb);
3054 * mono_thread_cleanup:
3057 mono_thread_cleanup (void)
3059 mono_threads_join_threads ();
3061 #if !defined(RUN_IN_SUBTHREAD) && !defined(HOST_WIN32)
3062 /* The main thread must abandon any held mutexes (particularly
3063 * important for named mutexes as they are shared across
3064 * processes, see bug 74680.) This will happen when the
3065 * thread exits, but if it's not running in a subthread it
3066 * won't exit in time.
3068 mono_w32mutex_abandon ();
3072 /* This stuff needs more testing, it seems one of these
3073 * critical sections can be locked when mono_thread_cleanup is
3076 mono_coop_mutex_destroy (&threads_mutex);
3077 mono_os_mutex_destroy (&interlocked_mutex);
3078 mono_os_mutex_destroy (&delayed_free_table_mutex);
3079 mono_os_mutex_destroy (&small_id_mutex);
3080 mono_os_event_destroy (&background_change_event);
3085 mono_threads_install_cleanup (MonoThreadCleanupFunc func)
3087 mono_thread_cleanup_fn = func;
3091 * mono_thread_set_manage_callback:
3094 mono_thread_set_manage_callback (MonoThread *thread, MonoThreadManageCallback func)
3096 thread->internal_thread->manage_callback = func;
3100 static void print_tids (gpointer key, gpointer value, gpointer user)
3102 /* GPOINTER_TO_UINT breaks horribly if sizeof(void *) >
3103 * sizeof(uint) and a cast to uint would overflow
3105 /* Older versions of glib don't have G_GSIZE_FORMAT, so just
3106 * print this as a pointer.
3108 g_message ("Waiting for: %p", key);
3113 MonoThreadHandle *handles[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3114 MonoInternalThread *threads[MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS];
3119 wait_for_tids (struct wait_data *wait, guint32 timeout, gboolean check_state_change)
3122 MonoThreadInfoWaitRet ret;
3124 THREAD_DEBUG (g_message("%s: %d threads to wait for in this batch", __func__, wait->num));
3126 /* Add the thread state change event, so it wakes
3127 * up if a thread changes to background mode. */
3130 if (check_state_change)
3131 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, &background_change_event, FALSE, timeout, TRUE);
3133 ret = mono_thread_info_wait_multiple_handle (wait->handles, wait->num, NULL, TRUE, timeout, TRUE);
3136 if (ret == MONO_THREAD_INFO_WAIT_RET_FAILED) {
3137 /* See the comment in build_wait_tids() */
3138 THREAD_DEBUG (g_message ("%s: Wait failed", __func__));
3142 for( i = 0; i < wait->num; i++)
3143 mono_threads_close_thread_handle (wait->handles [i]);
3145 if (ret == MONO_THREAD_INFO_WAIT_RET_TIMEOUT)
3148 if (ret < wait->num) {
3149 MonoInternalThread *internal;
3151 internal = wait->threads [ret];
3153 mono_threads_lock ();
3154 if (mono_g_hash_table_lookup (threads, (gpointer) internal->tid) == internal)
3155 g_error ("%s: failed to call mono_thread_detach_internal on thread %p, InternalThread: %p", __func__, internal->tid, internal);
3156 mono_threads_unlock ();
3160 static void build_wait_tids (gpointer key, gpointer value, gpointer user)
3162 struct wait_data *wait=(struct wait_data *)user;
3164 if(wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS - 1) {
3165 MonoInternalThread *thread=(MonoInternalThread *)value;
3167 /* Ignore background threads, we abort them later */
3168 /* Do not lock here since it is not needed and the caller holds threads_lock */
3169 if (thread->state & ThreadState_Background) {
3170 THREAD_DEBUG (g_message ("%s: ignoring background thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3171 return; /* just leave, ignore */
3174 if (mono_gc_is_finalizer_internal_thread (thread)) {
3175 THREAD_DEBUG (g_message ("%s: ignoring finalizer thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3179 if (thread == mono_thread_internal_current ()) {
3180 THREAD_DEBUG (g_message ("%s: ignoring current thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3184 if (mono_thread_get_main () && (thread == mono_thread_get_main ()->internal_thread)) {
3185 THREAD_DEBUG (g_message ("%s: ignoring main thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3189 if (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE) {
3190 THREAD_DEBUG (g_message ("%s: ignoring thread %" G_GSIZE_FORMAT "with DONT_MANAGE flag set.", __func__, (gsize)thread->tid));
3194 THREAD_DEBUG (g_message ("%s: Invoking mono_thread_manage callback on thread %p", __func__, thread));
3195 if ((thread->manage_callback == NULL) || (thread->manage_callback (thread->root_domain_thread) == TRUE)) {
3196 wait->handles[wait->num]=mono_threads_open_thread_handle (thread->handle);
3197 wait->threads[wait->num]=thread;
3200 THREAD_DEBUG (g_message ("%s: adding thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3202 THREAD_DEBUG (g_message ("%s: ignoring (because of callback) thread %"G_GSIZE_FORMAT, __func__, (gsize)thread->tid));
3207 /* Just ignore the rest, we can't do anything with
3214 remove_and_abort_threads (gpointer key, gpointer value, gpointer user)
3216 struct wait_data *wait=(struct wait_data *)user;
3217 MonoNativeThreadId self = mono_native_thread_id_get ();
3218 MonoInternalThread *thread = (MonoInternalThread *)value;
3220 if (wait->num >= MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS)
3223 if (mono_native_thread_id_equals (thread_get_tid (thread), self))
3225 if (mono_gc_is_finalizer_internal_thread (thread))
3228 if ((thread->state & ThreadState_Background) && !(thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)) {
3229 wait->handles[wait->num] = mono_threads_open_thread_handle (thread->handle);
3230 wait->threads[wait->num] = thread;
3233 THREAD_DEBUG (g_print ("%s: Aborting id: %"G_GSIZE_FORMAT"\n", __func__, (gsize)thread->tid));
3234 mono_thread_internal_abort (thread, FALSE);
3241 * mono_threads_set_shutting_down:
3243 * Is called by a thread that wants to shut down Mono. If the runtime is already
3244 * shutting down, the calling thread is suspended/stopped, and this function never
3248 mono_threads_set_shutting_down (void)
3250 MonoInternalThread *current_thread = mono_thread_internal_current ();
3252 mono_threads_lock ();
3254 if (shutting_down) {
3255 mono_threads_unlock ();
3257 /* Make sure we're properly suspended/stopped */
3259 LOCK_THREAD (current_thread);
3261 if (current_thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
3262 UNLOCK_THREAD (current_thread);
3263 mono_thread_execute_interruption ();
3265 UNLOCK_THREAD (current_thread);
3268 /*since we're killing the thread, detach it.*/
3269 mono_thread_detach_internal (current_thread);
3271 /* Wake up other threads potentially waiting for us */
3272 mono_thread_info_exit (0);
3274 shutting_down = TRUE;
3276 /* Not really a background state change, but this will
3277 * interrupt the main thread if it is waiting for all
3278 * the other threads.
3280 mono_os_event_set (&background_change_event);
3282 mono_threads_unlock ();
3287 * mono_thread_manage:
3290 mono_thread_manage (void)
3292 struct wait_data wait_data;
3293 struct wait_data *wait = &wait_data;
3295 memset (wait, 0, sizeof (struct wait_data));
3296 /* join each thread that's still running */
3297 THREAD_DEBUG (g_message ("%s: Joining each running thread...", __func__));
3299 mono_threads_lock ();
3301 THREAD_DEBUG (g_message("%s: No threads", __func__));
3302 mono_threads_unlock ();
3305 mono_threads_unlock ();
3308 mono_threads_lock ();
3309 if (shutting_down) {
3310 /* somebody else is shutting down */
3311 mono_threads_unlock ();
3314 THREAD_DEBUG (g_message ("%s: There are %d threads to join", __func__, mono_g_hash_table_size (threads));
3315 mono_g_hash_table_foreach (threads, print_tids, NULL));
3317 mono_os_event_reset (&background_change_event);
3319 /* We must zero all InternalThread pointers to avoid making the GC unhappy. */
3320 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3321 mono_g_hash_table_foreach (threads, build_wait_tids, wait);
3322 mono_threads_unlock ();
3324 /* Something to wait for */
3325 wait_for_tids (wait, MONO_INFINITE_WAIT, TRUE);
3326 THREAD_DEBUG (g_message ("%s: I have %d threads after waiting.", __func__, wait->num));
3327 } while(wait->num>0);
3329 /* Mono is shutting down, so just wait for the end */
3330 if (!mono_runtime_try_shutdown ()) {
3331 /*FIXME mono_thread_suspend probably should call mono_thread_execute_interruption when self interrupting. */
3332 mono_thread_suspend (mono_thread_internal_current ());
3333 mono_thread_execute_interruption ();
3337 * Remove everything but the finalizer thread and self.
3338 * Also abort all the background threads
3341 mono_threads_lock ();
3344 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3345 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3346 mono_g_hash_table_foreach_remove (threads, remove_and_abort_threads, wait);
3348 mono_threads_unlock ();
3350 THREAD_DEBUG (g_message ("%s: wait->num is now %d", __func__, wait->num));
3351 if (wait->num > 0) {
3352 /* Something to wait for */
3353 wait_for_tids (wait, MONO_INFINITE_WAIT, FALSE);
3355 } while (wait->num > 0);
3358 * give the subthreads a chance to really quit (this is mainly needed
3359 * to get correct user and system times from getrusage/wait/time(1)).
3360 * This could be removed if we avoid pthread_detach() and use pthread_join().
3362 mono_thread_info_yield ();
3366 collect_threads_for_suspend (gpointer key, gpointer value, gpointer user_data)
3368 MonoInternalThread *thread = (MonoInternalThread*)value;
3369 struct wait_data *wait = (struct wait_data*)user_data;
3372 * We try to exclude threads early, to avoid running into the MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS
3374 * This needs no locking.
3376 if ((thread->state & ThreadState_Suspended) != 0 ||
3377 (thread->state & ThreadState_Stopped) != 0)
3380 if (wait->num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3381 wait->handles [wait->num] = mono_threads_open_thread_handle (thread->handle);
3382 wait->threads [wait->num] = thread;
3388 * mono_thread_suspend_all_other_threads:
3390 * Suspend all managed threads except the finalizer thread and this thread. It is
3391 * not possible to resume them later.
3393 void mono_thread_suspend_all_other_threads (void)
3395 struct wait_data wait_data;
3396 struct wait_data *wait = &wait_data;
3398 MonoNativeThreadId self = mono_native_thread_id_get ();
3399 guint32 eventidx = 0;
3400 gboolean starting, finished;
3402 memset (wait, 0, sizeof (struct wait_data));
3404 * The other threads could be in an arbitrary state at this point, i.e.
3405 * they could be starting up, shutting down etc. This means that there could be
3406 * threads which are not even in the threads hash table yet.
3410 * First we set a barrier which will be checked by all threads before they
3411 * are added to the threads hash table, and they will exit if the flag is set.
3412 * This ensures that no threads could be added to the hash later.
3413 * We will use shutting_down as the barrier for now.
3415 g_assert (shutting_down);
3418 * We make multiple calls to WaitForMultipleObjects since:
3419 * - we can only wait for MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS threads
3420 * - some threads could exit without becoming suspended
3425 * Make a copy of the hashtable since we can't do anything with
3426 * threads while threads_mutex is held.
3429 /*We must zero all InternalThread pointers to avoid making the GC unhappy.*/
3430 memset (wait->threads, 0, MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS * SIZEOF_VOID_P);
3431 mono_threads_lock ();
3432 mono_g_hash_table_foreach (threads, collect_threads_for_suspend, wait);
3433 mono_threads_unlock ();
3436 /* Get the suspended events that we'll be waiting for */
3437 for (i = 0; i < wait->num; ++i) {
3438 MonoInternalThread *thread = wait->threads [i];
3440 if (mono_native_thread_id_equals (thread_get_tid (thread), self)
3441 || mono_gc_is_finalizer_internal_thread (thread)
3442 || (thread->flags & MONO_THREAD_FLAG_DONT_MANAGE)
3444 mono_threads_close_thread_handle (wait->handles [i]);
3445 wait->threads [i] = NULL;
3449 LOCK_THREAD (thread);
3451 if (thread->state & (ThreadState_Suspended | ThreadState_Stopped)) {
3452 UNLOCK_THREAD (thread);
3453 mono_threads_close_thread_handle (wait->handles [i]);
3454 wait->threads [i] = NULL;
3460 /* Convert abort requests into suspend requests */
3461 if ((thread->state & ThreadState_AbortRequested) != 0)
3462 thread->state &= ~ThreadState_AbortRequested;
3464 thread->state |= ThreadState_SuspendRequested;
3465 mono_os_event_reset (thread->suspended);
3467 /* Signal the thread to suspend + calls UNLOCK_THREAD (thread) */
3468 async_suspend_internal (thread, TRUE);
3470 mono_threads_close_thread_handle (wait->handles [i]);
3471 wait->threads [i] = NULL;
3473 if (eventidx <= 0) {
3475 * If there are threads which are starting up, we wait until they
3476 * are suspended when they try to register in the threads hash.
3477 * This is guaranteed to finish, since the threads which can create new
3478 * threads get suspended after a while.
3479 * FIXME: The finalizer thread can still create new threads.
3481 mono_threads_lock ();
3482 if (threads_starting_up)
3483 starting = mono_g_hash_table_size (threads_starting_up) > 0;
3486 mono_threads_unlock ();
3488 mono_thread_info_sleep (100, NULL);
3496 MonoInternalThread *thread;
3497 MonoStackFrameInfo *frames;
3498 int nframes, max_frames;
3499 int nthreads, max_threads;
3500 MonoInternalThread **threads;
3501 } ThreadDumpUserData;
3503 static gboolean thread_dump_requested;
3505 /* This needs to be async safe */
3507 collect_frame (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
3509 ThreadDumpUserData *ud = (ThreadDumpUserData *)data;
3511 if (ud->nframes < ud->max_frames) {
3512 memcpy (&ud->frames [ud->nframes], frame, sizeof (MonoStackFrameInfo));
3519 /* This needs to be async safe */
3520 static SuspendThreadResult
3521 get_thread_dump (MonoThreadInfo *info, gpointer ud)
3523 ThreadDumpUserData *user_data = (ThreadDumpUserData *)ud;
3524 MonoInternalThread *thread = user_data->thread;
3527 /* This no longer works with remote unwinding */
3528 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
3529 mono_thread_internal_describe (thread, text);
3530 g_string_append (text, "\n");
3533 if (thread == mono_thread_internal_current ())
3534 mono_get_eh_callbacks ()->mono_walk_stack_with_ctx (collect_frame, NULL, MONO_UNWIND_SIGNAL_SAFE, ud);
3536 mono_get_eh_callbacks ()->mono_walk_stack_with_state (collect_frame, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, ud);
3538 return MonoResumeThread;
3542 int nthreads, max_threads;
3543 MonoInternalThread **threads;
3544 } CollectThreadsUserData;
3547 collect_thread (gpointer key, gpointer value, gpointer user)
3549 CollectThreadsUserData *ud = (CollectThreadsUserData *)user;
3550 MonoInternalThread *thread = (MonoInternalThread *)value;
3552 if (ud->nthreads < ud->max_threads)
3553 ud->threads [ud->nthreads ++] = thread;
3557 * Collect running threads into the THREADS array.
3558 * THREADS should be an array allocated on the stack.
3561 collect_threads (MonoInternalThread **thread_array, int max_threads)
3563 CollectThreadsUserData ud;
3565 memset (&ud, 0, sizeof (ud));
3566 /* This array contains refs, but its on the stack, so its ok */
3567 ud.threads = thread_array;
3568 ud.max_threads = max_threads;
3570 mono_threads_lock ();
3571 mono_g_hash_table_foreach (threads, collect_thread, &ud);
3572 mono_threads_unlock ();
3578 dump_thread (MonoInternalThread *thread, ThreadDumpUserData *ud)
3580 GString* text = g_string_new (0);
3582 GError *error = NULL;
3585 ud->thread = thread;
3588 /* Collect frames for the thread */
3589 if (thread == mono_thread_internal_current ()) {
3590 get_thread_dump (mono_thread_info_current (), ud);
3592 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, ud);
3596 * Do all the non async-safe work outside of get_thread_dump.
3599 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
3601 g_string_append_printf (text, "\n\"%s\"", name);
3604 else if (thread->threadpool_thread) {
3605 g_string_append (text, "\n\"<threadpool thread>\"");
3607 g_string_append (text, "\n\"<unnamed thread>\"");
3610 for (i = 0; i < ud->nframes; ++i) {
3611 MonoStackFrameInfo *frame = &ud->frames [i];
3612 MonoMethod *method = NULL;
3614 if (frame->type == FRAME_TYPE_MANAGED)
3615 method = mono_jit_info_get_method (frame->ji);
3618 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
3619 g_string_append_printf (text, " %s\n", location);
3622 g_string_append_printf (text, " at <unknown> <0x%05x>\n", frame->native_offset);
3626 fprintf (stdout, "%s", text->str);
3628 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
3629 OutputDebugStringA(text->str);
3632 g_string_free (text, TRUE);
3637 mono_threads_perform_thread_dump (void)
3639 ThreadDumpUserData ud;
3640 MonoInternalThread *thread_array [128];
3641 int tindex, nthreads;
3643 if (!thread_dump_requested)
3646 printf ("Full thread dump:\n");
3648 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3649 nthreads = collect_threads (thread_array, 128);
3651 memset (&ud, 0, sizeof (ud));
3652 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3653 ud.max_frames = 256;
3655 for (tindex = 0; tindex < nthreads; ++tindex)
3656 dump_thread (thread_array [tindex], &ud);
3660 thread_dump_requested = FALSE;
3663 /* Obtain the thread dump of all threads */
3665 mono_threads_get_thread_dump (MonoArray **out_threads, MonoArray **out_stack_frames, MonoError *error)
3668 ThreadDumpUserData ud;
3669 MonoInternalThread *thread_array [128];
3670 MonoDomain *domain = mono_domain_get ();
3671 MonoDebugSourceLocation *location;
3672 int tindex, nthreads;
3676 *out_threads = NULL;
3677 *out_stack_frames = NULL;
3679 /* Make a copy of the threads hash to avoid doing work inside threads_lock () */
3680 nthreads = collect_threads (thread_array, 128);
3682 memset (&ud, 0, sizeof (ud));
3683 ud.frames = g_new0 (MonoStackFrameInfo, 256);
3684 ud.max_frames = 256;
3686 *out_threads = mono_array_new_checked (domain, mono_defaults.thread_class, nthreads, error);
3689 *out_stack_frames = mono_array_new_checked (domain, mono_defaults.array_class, nthreads, error);
3693 for (tindex = 0; tindex < nthreads; ++tindex) {
3694 MonoInternalThread *thread = thread_array [tindex];
3695 MonoArray *thread_frames;
3701 /* Collect frames for the thread */
3702 if (thread == mono_thread_internal_current ()) {
3703 get_thread_dump (mono_thread_info_current (), &ud);
3705 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, get_thread_dump, &ud);
3708 mono_array_setref_fast (*out_threads, tindex, mono_thread_current_for_thread (thread));
3710 thread_frames = mono_array_new_checked (domain, mono_defaults.stack_frame_class, ud.nframes, error);
3713 mono_array_setref_fast (*out_stack_frames, tindex, thread_frames);
3715 for (i = 0; i < ud.nframes; ++i) {
3716 MonoStackFrameInfo *frame = &ud.frames [i];
3717 MonoMethod *method = NULL;
3718 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, error);
3722 sf->native_offset = frame->native_offset;
3724 if (frame->type == FRAME_TYPE_MANAGED)
3725 method = mono_jit_info_get_method (frame->ji);
3728 sf->method_address = (gsize) frame->ji->code_start;
3730 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, error);
3733 MONO_OBJECT_SETREF (sf, method, rm);
3735 location = mono_debug_lookup_source_location (method, frame->native_offset, domain);
3737 sf->il_offset = location->il_offset;
3739 if (location && location->source_file) {
3740 MonoString *filename = mono_string_new_checked (domain, location->source_file, error);
3743 MONO_OBJECT_SETREF (sf, filename, filename);
3744 sf->line = location->row;
3745 sf->column = location->column;
3747 mono_debug_free_source_location (location);
3752 mono_array_setref (thread_frames, i, sf);
3758 return is_ok (error);
3762 * mono_threads_request_thread_dump:
3764 * Ask all threads except the current to print their stacktrace to stdout.
3767 mono_threads_request_thread_dump (void)
3769 /*The new thread dump code runs out of the finalizer thread. */
3770 thread_dump_requested = TRUE;
3771 mono_gc_finalize_notify ();
3776 gint allocated; /* +1 so that refs [allocated] == NULL */
3780 typedef struct ref_stack RefStack;
3783 ref_stack_new (gint initial_size)
3787 initial_size = MAX (initial_size, 16) + 1;
3788 rs = g_new0 (RefStack, 1);
3789 rs->refs = g_new0 (gpointer, initial_size);
3790 rs->allocated = initial_size;
3795 ref_stack_destroy (gpointer ptr)
3797 RefStack *rs = (RefStack *)ptr;
3806 ref_stack_push (RefStack *rs, gpointer ptr)
3808 g_assert (rs != NULL);
3810 if (rs->bottom >= rs->allocated) {
3811 rs->refs = (void **)g_realloc (rs->refs, rs->allocated * 2 * sizeof (gpointer) + 1);
3812 rs->allocated <<= 1;
3813 rs->refs [rs->allocated] = NULL;
3815 rs->refs [rs->bottom++] = ptr;
3819 ref_stack_pop (RefStack *rs)
3821 if (rs == NULL || rs->bottom == 0)
3825 rs->refs [rs->bottom] = NULL;
3829 ref_stack_find (RefStack *rs, gpointer ptr)
3836 for (refs = rs->refs; refs && *refs; refs++) {
3844 * mono_thread_push_appdomain_ref:
3846 * Register that the current thread may have references to objects in domain
3847 * @domain on its stack. Each call to this function should be paired with a
3848 * call to pop_appdomain_ref.
3851 mono_thread_push_appdomain_ref (MonoDomain *domain)
3853 MonoInternalThread *thread = mono_thread_internal_current ();
3856 /* printf ("PUSH REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, domain->friendly_name); */
3857 SPIN_LOCK (thread->lock_thread_id);
3858 if (thread->appdomain_refs == NULL)
3859 thread->appdomain_refs = ref_stack_new (16);
3860 ref_stack_push ((RefStack *)thread->appdomain_refs, domain);
3861 SPIN_UNLOCK (thread->lock_thread_id);
3866 mono_thread_pop_appdomain_ref (void)
3868 MonoInternalThread *thread = mono_thread_internal_current ();
3871 /* printf ("POP REF: %"G_GSIZE_FORMAT" -> %s.\n", (gsize)thread->tid, ((MonoDomain*)(thread->appdomain_refs->data))->friendly_name); */
3872 SPIN_LOCK (thread->lock_thread_id);
3873 ref_stack_pop ((RefStack *)thread->appdomain_refs);
3874 SPIN_UNLOCK (thread->lock_thread_id);
3879 mono_thread_internal_has_appdomain_ref (MonoInternalThread *thread, MonoDomain *domain)
3882 SPIN_LOCK (thread->lock_thread_id);
3883 res = ref_stack_find ((RefStack *)thread->appdomain_refs, domain);
3884 SPIN_UNLOCK (thread->lock_thread_id);
3889 mono_thread_has_appdomain_ref (MonoThread *thread, MonoDomain *domain)
3891 return mono_thread_internal_has_appdomain_ref (thread->internal_thread, domain);
3894 typedef struct abort_appdomain_data {
3895 struct wait_data wait;
3897 } abort_appdomain_data;
3900 collect_appdomain_thread (gpointer key, gpointer value, gpointer user_data)
3902 MonoInternalThread *thread = (MonoInternalThread*)value;
3903 abort_appdomain_data *data = (abort_appdomain_data*)user_data;
3904 MonoDomain *domain = data->domain;
3906 if (mono_thread_internal_has_appdomain_ref (thread, domain)) {
3907 /* printf ("ABORTING THREAD %p BECAUSE IT REFERENCES DOMAIN %s.\n", thread->tid, domain->friendly_name); */
3909 if(data->wait.num<MONO_W32HANDLE_MAXIMUM_WAIT_OBJECTS) {
3910 data->wait.handles [data->wait.num] = mono_threads_open_thread_handle (thread->handle);
3911 data->wait.threads [data->wait.num] = thread;
3914 /* Just ignore the rest, we can't do anything with
3922 * mono_threads_abort_appdomain_threads:
3924 * Abort threads which has references to the given appdomain.
3927 mono_threads_abort_appdomain_threads (MonoDomain *domain, int timeout)
3929 abort_appdomain_data user_data;
3931 int orig_timeout = timeout;
3934 THREAD_DEBUG (g_message ("%s: starting abort", __func__));
3936 start_time = mono_msec_ticks ();
3938 mono_threads_lock ();
3940 user_data.domain = domain;
3941 user_data.wait.num = 0;
3942 /* This shouldn't take any locks */
3943 mono_g_hash_table_foreach (threads, collect_appdomain_thread, &user_data);
3944 mono_threads_unlock ();
3946 if (user_data.wait.num > 0) {
3947 /* Abort the threads outside the threads lock */
3948 for (i = 0; i < user_data.wait.num; ++i)
3949 mono_thread_internal_abort (user_data.wait.threads [i], TRUE);
3952 * We should wait for the threads either to abort, or to leave the
3953 * domain. We can't do the latter, so we wait with a timeout.
3955 wait_for_tids (&user_data.wait, 100, FALSE);
3958 /* Update remaining time */
3959 timeout -= mono_msec_ticks () - start_time;
3960 start_time = mono_msec_ticks ();
3962 if (orig_timeout != -1 && timeout < 0)
3965 while (user_data.wait.num > 0);
3967 THREAD_DEBUG (g_message ("%s: abort done", __func__));
3973 mono_thread_self_abort (void)
3976 self_abort_internal (&error);
3977 mono_error_set_pending_exception (&error);
3981 * mono_thread_get_undeniable_exception:
3983 * Return an exception which needs to be raised when leaving a catch clause.
3984 * This is used for undeniable exception propagation.
3987 mono_thread_get_undeniable_exception (void)
3989 MonoInternalThread *thread = mono_thread_internal_current ();
3991 if (!(thread && thread->abort_exc && !is_running_protected_wrapper ()))
3994 // We don't want to have our exception effect calls made by
3995 // the catching block
3997 if (!mono_get_eh_callbacks ()->mono_above_abort_threshold ())
4001 * FIXME: Clear the abort exception and return an AppDomainUnloaded
4002 * exception if the thread no longer references a dying appdomain.
4004 thread->abort_exc->trace_ips = NULL;
4005 thread->abort_exc->stack_trace = NULL;
4006 return thread->abort_exc;
4009 #if MONO_SMALL_CONFIG
4010 #define NUM_STATIC_DATA_IDX 4
4011 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4015 #define NUM_STATIC_DATA_IDX 8
4016 static const int static_data_size [NUM_STATIC_DATA_IDX] = {
4017 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216
4021 static MonoBitSet *thread_reference_bitmaps [NUM_STATIC_DATA_IDX];
4022 static MonoBitSet *context_reference_bitmaps [NUM_STATIC_DATA_IDX];
4025 mark_slots (void *addr, MonoBitSet **bitmaps, MonoGCMarkFunc mark_func, void *gc_data)
4027 gpointer *static_data = (gpointer *)addr;
4029 for (int i = 0; i < NUM_STATIC_DATA_IDX; ++i) {
4030 void **ptr = (void **)static_data [i];
4035 MONO_BITSET_FOREACH (bitmaps [i], idx, {
4036 void **p = ptr + idx;
4039 mark_func ((MonoObject**)p, gc_data);
4045 mark_tls_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4047 mark_slots (addr, thread_reference_bitmaps, mark_func, gc_data);
4051 mark_ctx_slots (void *addr, MonoGCMarkFunc mark_func, void *gc_data)
4053 mark_slots (addr, context_reference_bitmaps, mark_func, gc_data);
4057 * mono_alloc_static_data
4059 * Allocate memory blocks for storing threads or context static data
4062 mono_alloc_static_data (gpointer **static_data_ptr, guint32 offset, gboolean threadlocal)
4064 guint idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4067 gpointer* static_data = *static_data_ptr;
4069 static MonoGCDescriptor tls_desc = MONO_GC_DESCRIPTOR_NULL;
4070 static MonoGCDescriptor ctx_desc = MONO_GC_DESCRIPTOR_NULL;
4072 if (mono_gc_user_markers_supported ()) {
4073 if (tls_desc == MONO_GC_DESCRIPTOR_NULL)
4074 tls_desc = mono_gc_make_root_descr_user (mark_tls_slots);
4076 if (ctx_desc == MONO_GC_DESCRIPTOR_NULL)
4077 ctx_desc = mono_gc_make_root_descr_user (mark_ctx_slots);
4080 static_data = (void **)mono_gc_alloc_fixed (static_data_size [0], threadlocal ? tls_desc : ctx_desc,
4081 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4082 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4083 *static_data_ptr = static_data;
4084 static_data [0] = static_data;
4087 for (i = 1; i <= idx; ++i) {
4088 if (static_data [i])
4091 if (mono_gc_user_markers_supported ())
4092 static_data [i] = g_malloc0 (static_data_size [i]);
4094 static_data [i] = mono_gc_alloc_fixed (static_data_size [i], MONO_GC_DESCRIPTOR_NULL,
4095 threadlocal ? MONO_ROOT_SOURCE_THREAD_STATIC : MONO_ROOT_SOURCE_CONTEXT_STATIC,
4096 threadlocal ? "managed thread-static variables" : "managed context-static variables");
4101 mono_free_static_data (gpointer* static_data)
4104 for (i = 1; i < NUM_STATIC_DATA_IDX; ++i) {
4105 gpointer p = static_data [i];
4109 * At this point, the static data pointer array is still registered with the
4110 * GC, so must ensure that mark_tls_slots() will not encounter any invalid
4111 * data. Freeing the individual arrays without first nulling their slots
4112 * would make it possible for mark_tls/ctx_slots() to encounter a pointer to
4113 * such an already freed array. See bug #13813.
4115 static_data [i] = NULL;
4116 mono_memory_write_barrier ();
4117 if (mono_gc_user_markers_supported ())
4120 mono_gc_free_fixed (p);
4122 mono_gc_free_fixed (static_data);
4126 * mono_init_static_data_info
4128 * Initializes static data counters
4130 static void mono_init_static_data_info (StaticDataInfo *static_data)
4132 static_data->idx = 0;
4133 static_data->offset = 0;
4134 static_data->freelist = NULL;
4138 * mono_alloc_static_data_slot
4140 * Generates an offset for static data. static_data contains the counters
4141 * used to generate it.
4144 mono_alloc_static_data_slot (StaticDataInfo *static_data, guint32 size, guint32 align)
4146 if (!static_data->idx && !static_data->offset) {
4148 * we use the first chunk of the first allocation also as
4149 * an array for the rest of the data
4151 static_data->offset = sizeof (gpointer) * NUM_STATIC_DATA_IDX;
4153 static_data->offset += align - 1;
4154 static_data->offset &= ~(align - 1);
4155 if (static_data->offset + size >= static_data_size [static_data->idx]) {
4156 static_data->idx ++;
4157 g_assert (size <= static_data_size [static_data->idx]);
4158 g_assert (static_data->idx < NUM_STATIC_DATA_IDX);
4159 static_data->offset = 0;
4161 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (static_data->idx, static_data->offset, 0);
4162 static_data->offset += size;
4167 * LOCKING: requires that threads_mutex is held
4170 context_adjust_static_data (MonoAppContext *ctx)
4172 if (context_static_info.offset || context_static_info.idx > 0) {
4173 guint32 offset = MAKE_SPECIAL_STATIC_OFFSET (context_static_info.idx, context_static_info.offset, 0);
4174 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4175 ctx->data->static_data = ctx->static_data;
4180 * LOCKING: requires that threads_mutex is held
4183 alloc_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4185 MonoInternalThread *thread = (MonoInternalThread *)value;
4186 guint32 offset = GPOINTER_TO_UINT (user);
4188 mono_alloc_static_data (&(thread->static_data), offset, TRUE);
4192 * LOCKING: requires that threads_mutex is held
4195 alloc_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4197 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4202 guint32 offset = GPOINTER_TO_UINT (user);
4203 mono_alloc_static_data (&ctx->static_data, offset, FALSE);
4204 ctx->data->static_data = ctx->static_data;
4207 static StaticDataFreeList*
4208 search_slot_in_freelist (StaticDataInfo *static_data, guint32 size, guint32 align)
4210 StaticDataFreeList* prev = NULL;
4211 StaticDataFreeList* tmp = static_data->freelist;
4213 if (tmp->size == size) {
4215 prev->next = tmp->next;
4217 static_data->freelist = tmp->next;
4226 #if SIZEOF_VOID_P == 4
4233 update_reference_bitmap (MonoBitSet **sets, guint32 offset, uintptr_t *bitmap, int numbits)
4235 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4237 sets [idx] = mono_bitset_new (static_data_size [idx] / sizeof (uintptr_t), 0);
4238 MonoBitSet *rb = sets [idx];
4239 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4240 offset /= sizeof (uintptr_t);
4241 /* offset is now the bitmap offset */
4242 for (int i = 0; i < numbits; ++i) {
4243 if (bitmap [i / sizeof (uintptr_t)] & (ONE_P << (i & (sizeof (uintptr_t) * 8 -1))))
4244 mono_bitset_set_fast (rb, offset + i);
4249 clear_reference_bitmap (MonoBitSet **sets, guint32 offset, guint32 size)
4251 int idx = ACCESS_SPECIAL_STATIC_OFFSET (offset, index);
4252 MonoBitSet *rb = sets [idx];
4253 offset = ACCESS_SPECIAL_STATIC_OFFSET (offset, offset);
4254 offset /= sizeof (uintptr_t);
4255 /* offset is now the bitmap offset */
4256 for (int i = 0; i < size / sizeof (uintptr_t); i++)
4257 mono_bitset_clear_fast (rb, offset + i);
4261 mono_alloc_special_static_data (guint32 static_type, guint32 size, guint32 align, uintptr_t *bitmap, int numbits)
4263 g_assert (static_type == SPECIAL_STATIC_THREAD || static_type == SPECIAL_STATIC_CONTEXT);
4265 StaticDataInfo *info;
4268 if (static_type == SPECIAL_STATIC_THREAD) {
4269 info = &thread_static_info;
4270 sets = thread_reference_bitmaps;
4272 info = &context_static_info;
4273 sets = context_reference_bitmaps;
4276 mono_threads_lock ();
4278 StaticDataFreeList *item = search_slot_in_freelist (info, size, align);
4282 offset = item->offset;
4285 offset = mono_alloc_static_data_slot (info, size, align);
4288 update_reference_bitmap (sets, offset, bitmap, numbits);
4290 if (static_type == SPECIAL_STATIC_THREAD) {
4291 /* This can be called during startup */
4292 if (threads != NULL)
4293 mono_g_hash_table_foreach (threads, alloc_thread_static_data_helper, GUINT_TO_POINTER (offset));
4295 if (contexts != NULL)
4296 g_hash_table_foreach (contexts, alloc_context_static_data_helper, GUINT_TO_POINTER (offset));
4298 ACCESS_SPECIAL_STATIC_OFFSET (offset, type) = SPECIAL_STATIC_OFFSET_TYPE_CONTEXT;
4301 mono_threads_unlock ();
4307 mono_get_special_static_data_for_thread (MonoInternalThread *thread, guint32 offset)
4309 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4311 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4312 return get_thread_static_data (thread, offset);
4314 return get_context_static_data (thread->current_appcontext, offset);
4319 mono_get_special_static_data (guint32 offset)
4321 return mono_get_special_static_data_for_thread (mono_thread_internal_current (), offset);
4330 * LOCKING: requires that threads_mutex is held
4333 free_thread_static_data_helper (gpointer key, gpointer value, gpointer user)
4335 MonoInternalThread *thread = (MonoInternalThread *)value;
4336 OffsetSize *data = (OffsetSize *)user;
4337 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4338 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4341 if (!thread->static_data || !thread->static_data [idx])
4343 ptr = ((char*) thread->static_data [idx]) + off;
4344 mono_gc_bzero_atomic (ptr, data->size);
4348 * LOCKING: requires that threads_mutex is held
4351 free_context_static_data_helper (gpointer key, gpointer value, gpointer user)
4353 MonoAppContext *ctx = (MonoAppContext *) mono_gchandle_get_target (GPOINTER_TO_INT (key));
4358 OffsetSize *data = (OffsetSize *)user;
4359 int idx = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, index);
4360 int off = ACCESS_SPECIAL_STATIC_OFFSET (data->offset, offset);
4363 if (!ctx->static_data || !ctx->static_data [idx])
4366 ptr = ((char*) ctx->static_data [idx]) + off;
4367 mono_gc_bzero_atomic (ptr, data->size);
4371 do_free_special_slot (guint32 offset, guint32 size)
4373 guint32 static_type = ACCESS_SPECIAL_STATIC_OFFSET (offset, type);
4375 StaticDataInfo *info;
4377 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4378 info = &thread_static_info;
4379 sets = thread_reference_bitmaps;
4381 info = &context_static_info;
4382 sets = context_reference_bitmaps;
4385 guint32 data_offset = offset;
4386 ACCESS_SPECIAL_STATIC_OFFSET (data_offset, type) = 0;
4387 OffsetSize data = { data_offset, size };
4389 clear_reference_bitmap (sets, data.offset, data.size);
4391 if (static_type == SPECIAL_STATIC_OFFSET_TYPE_THREAD) {
4392 if (threads != NULL)
4393 mono_g_hash_table_foreach (threads, free_thread_static_data_helper, &data);
4395 if (contexts != NULL)
4396 g_hash_table_foreach (contexts, free_context_static_data_helper, &data);
4399 if (!mono_runtime_is_shutting_down ()) {
4400 StaticDataFreeList *item = g_new0 (StaticDataFreeList, 1);
4402 item->offset = offset;
4405 item->next = info->freelist;
4406 info->freelist = item;
4411 do_free_special (gpointer key, gpointer value, gpointer data)
4413 MonoClassField *field = (MonoClassField *)key;
4414 guint32 offset = GPOINTER_TO_UINT (value);
4417 size = mono_type_size (field->type, &align);
4418 do_free_special_slot (offset, size);
4422 mono_alloc_special_static_data_free (GHashTable *special_static_fields)
4424 mono_threads_lock ();
4426 g_hash_table_foreach (special_static_fields, do_free_special, NULL);
4428 mono_threads_unlock ();
4432 static void CALLBACK dummy_apc (ULONG_PTR param)
4438 * mono_thread_execute_interruption
4440 * Performs the operation that the requested thread state requires (abort,
4443 static MonoException*
4444 mono_thread_execute_interruption (void)
4446 MonoInternalThread *thread = mono_thread_internal_current ();
4447 MonoThread *sys_thread = mono_thread_current ();
4449 LOCK_THREAD (thread);
4451 /* MonoThread::interruption_requested can only be changed with atomics */
4452 if (!mono_thread_clear_interruption_requested (thread)) {
4453 UNLOCK_THREAD (thread);
4457 /* this will consume pending APC calls */
4458 #ifdef USE_WINDOWS_BACKEND
4459 mono_win32_wait_for_single_object_ex (GetCurrentThread (), 0, TRUE);
4462 /* Clear the interrupted flag of the thread so it can wait again */
4463 mono_thread_info_clear_self_interrupt ();
4465 /* If there's a pending exception and an AbortRequested, the pending exception takes precedence */
4466 if (sys_thread->pending_exception) {
4469 exc = sys_thread->pending_exception;
4470 sys_thread->pending_exception = NULL;
4472 UNLOCK_THREAD (thread);
4474 } else if (thread->state & (ThreadState_AbortRequested)) {
4475 UNLOCK_THREAD (thread);
4476 g_assert (sys_thread->pending_exception == NULL);
4477 if (thread->abort_exc == NULL) {
4479 * This might be racy, but it has to be called outside the lock
4480 * since it calls managed code.
4482 MONO_OBJECT_SETREF (thread, abort_exc, mono_get_exception_thread_abort ());
4484 return thread->abort_exc;
4485 } else if (thread->state & (ThreadState_SuspendRequested)) {
4486 /* calls UNLOCK_THREAD (thread) */
4487 self_suspend_internal ();
4489 } else if (thread->thread_interrupt_requested) {
4491 thread->thread_interrupt_requested = FALSE;
4492 UNLOCK_THREAD (thread);
4494 return(mono_get_exception_thread_interrupted ());
4497 UNLOCK_THREAD (thread);
4503 * mono_thread_request_interruption
4505 * A signal handler can call this method to request the interruption of a
4506 * thread. The result of the interruption will depend on the current state of
4507 * the thread. If the result is an exception that needs to be throw, it is
4508 * provided as return value.
4511 mono_thread_request_interruption (gboolean running_managed)
4513 MonoInternalThread *thread = mono_thread_internal_current ();
4515 /* The thread may already be stopping */
4519 if (!mono_thread_set_interruption_requested (thread))
4522 if (!running_managed || is_running_protected_wrapper ()) {
4523 /* Can't stop while in unmanaged code. Increase the global interruption
4524 request count. When exiting the unmanaged method the count will be
4525 checked and the thread will be interrupted. */
4527 /* this will awake the thread if it is in WaitForSingleObject
4529 #ifdef USE_WINDOWS_BACKEND
4530 mono_win32_interrupt_wait (thread->thread_info, thread->native_handle, (DWORD)thread->tid);
4532 mono_thread_info_self_interrupt ();
4537 return mono_thread_execute_interruption ();
4541 /*This function should be called by a thread after it has exited all of
4542 * its handle blocks at interruption time.*/
4544 mono_thread_resume_interruption (gboolean exec)
4546 MonoInternalThread *thread = mono_thread_internal_current ();
4547 gboolean still_aborting;
4549 /* The thread may already be stopping */
4553 LOCK_THREAD (thread);
4554 still_aborting = (thread->state & (ThreadState_AbortRequested)) != 0;
4555 UNLOCK_THREAD (thread);
4557 /*This can happen if the protected block called Thread::ResetAbort*/
4558 if (!still_aborting)
4561 if (!mono_thread_set_interruption_requested (thread))
4564 mono_thread_info_self_interrupt ();
4567 return mono_thread_execute_interruption ();
4572 gboolean mono_thread_interruption_requested ()
4574 if (thread_interruption_requested) {
4575 MonoInternalThread *thread = mono_thread_internal_current ();
4576 /* The thread may already be stopping */
4578 return mono_thread_get_interruption_requested (thread);
4583 static MonoException*
4584 mono_thread_interruption_checkpoint_request (gboolean bypass_abort_protection)
4586 MonoInternalThread *thread = mono_thread_internal_current ();
4588 /* The thread may already be stopping */
4591 if (!mono_thread_get_interruption_requested (thread))
4593 if (!bypass_abort_protection && is_running_protected_wrapper ())
4596 return mono_thread_execute_interruption ();
4600 * Performs the interruption of the current thread, if one has been requested,
4601 * and the thread is not running a protected wrapper.
4602 * Return the exception which needs to be thrown, if any.
4605 mono_thread_interruption_checkpoint (void)
4607 return mono_thread_interruption_checkpoint_request (FALSE);
4611 * Performs the interruption of the current thread, if one has been requested.
4612 * Return the exception which needs to be thrown, if any.
4615 mono_thread_force_interruption_checkpoint_noraise (void)
4617 return mono_thread_interruption_checkpoint_request (TRUE);
4621 * mono_set_pending_exception:
4623 * Set the pending exception of the current thread to EXC.
4624 * The exception will be thrown when execution returns to managed code.
4627 mono_set_pending_exception (MonoException *exc)
4629 MonoThread *thread = mono_thread_current ();
4631 /* The thread may already be stopping */
4635 MONO_OBJECT_SETREF (thread, pending_exception, exc);
4637 mono_thread_request_interruption (FALSE);
4641 * mono_thread_interruption_request_flag:
4643 * Returns the address of a flag that will be non-zero if an interruption has
4644 * been requested for a thread. The thread to interrupt may not be the current
4645 * thread, so an additional call to mono_thread_interruption_requested() or
4646 * mono_thread_interruption_checkpoint() is allways needed if the flag is not
4649 gint32* mono_thread_interruption_request_flag ()
4651 return &thread_interruption_requested;
4655 mono_thread_init_apartment_state (void)
4658 MonoInternalThread* thread = mono_thread_internal_current ();
4660 /* Positive return value indicates success, either
4661 * S_OK if this is first CoInitialize call, or
4662 * S_FALSE if CoInitialize already called, but with same
4663 * threading model. A negative value indicates failure,
4664 * probably due to trying to change the threading model.
4666 if (CoInitializeEx(NULL, (thread->apartment_state == ThreadApartmentState_STA)
4667 ? COINIT_APARTMENTTHREADED
4668 : COINIT_MULTITHREADED) < 0) {
4669 thread->apartment_state = ThreadApartmentState_Unknown;
4675 mono_thread_cleanup_apartment_state (void)
4678 MonoInternalThread* thread = mono_thread_internal_current ();
4680 if (thread && thread->apartment_state != ThreadApartmentState_Unknown) {
4687 mono_thread_set_state (MonoInternalThread *thread, MonoThreadState state)
4689 LOCK_THREAD (thread);
4690 thread->state |= state;
4691 UNLOCK_THREAD (thread);
4695 * mono_thread_test_and_set_state:
4696 * Test if current state of \p thread include \p test. If it does not, OR \p set into the state.
4697 * \returns TRUE if \p set was OR'd in.
4700 mono_thread_test_and_set_state (MonoInternalThread *thread, MonoThreadState test, MonoThreadState set)
4702 LOCK_THREAD (thread);
4704 if ((thread->state & test) != 0) {
4705 UNLOCK_THREAD (thread);
4709 thread->state |= set;
4710 UNLOCK_THREAD (thread);
4716 mono_thread_clr_state (MonoInternalThread *thread, MonoThreadState state)
4718 LOCK_THREAD (thread);
4719 thread->state &= ~state;
4720 UNLOCK_THREAD (thread);
4724 mono_thread_test_state (MonoInternalThread *thread, MonoThreadState test)
4726 gboolean ret = FALSE;
4728 LOCK_THREAD (thread);
4730 if ((thread->state & test) != 0) {
4734 UNLOCK_THREAD (thread);
4740 self_interrupt_thread (void *_unused)
4743 MonoThreadInfo *info;
4745 exc = mono_thread_execute_interruption ();
4747 if (mono_threads_is_coop_enabled ()) {
4748 /* We can return from an async call in coop, as
4749 * it's simply called when exiting the safepoint */
4753 g_error ("%s: we can't resume from an async call", __func__);
4756 info = mono_thread_info_current ();
4758 /* We must use _with_context since we didn't trampoline into the runtime */
4759 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. */
4763 mono_jit_info_match (MonoJitInfo *ji, gpointer ip)
4767 return ji->code_start <= ip && (char*)ip < (char*)ji->code_start + ji->code_size;
4771 last_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer data)
4773 MonoJitInfo **dest = (MonoJitInfo **)data;
4779 mono_thread_info_get_last_managed (MonoThreadInfo *info)
4781 MonoJitInfo *ji = NULL;
4786 * The suspended thread might be holding runtime locks. Make sure we don't try taking
4787 * any runtime locks while unwinding. In coop case we shouldn't safepoint in regions
4788 * where we hold runtime locks.
4790 if (!mono_threads_is_coop_enabled ())
4791 mono_thread_info_set_is_async_context (TRUE);
4792 mono_get_eh_callbacks ()->mono_walk_stack_with_state (last_managed, mono_thread_info_get_suspend_state (info), MONO_UNWIND_SIGNAL_SAFE, &ji);
4793 if (!mono_threads_is_coop_enabled ())
4794 mono_thread_info_set_is_async_context (FALSE);
4799 MonoInternalThread *thread;
4800 gboolean install_async_abort;
4801 MonoThreadInfoInterruptToken *interrupt_token;
4804 static SuspendThreadResult
4805 async_abort_critical (MonoThreadInfo *info, gpointer ud)
4807 AbortThreadData *data = (AbortThreadData *)ud;
4808 MonoInternalThread *thread = data->thread;
4809 MonoJitInfo *ji = NULL;
4810 gboolean protected_wrapper;
4811 gboolean running_managed;
4813 if (mono_get_eh_callbacks ()->mono_install_handler_block_guard (mono_thread_info_get_suspend_state (info)))
4814 return MonoResumeThread;
4816 /*someone is already interrupting it*/
4817 if (!mono_thread_set_interruption_requested (thread))
4818 return MonoResumeThread;
4820 ji = mono_thread_info_get_last_managed (info);
4821 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4822 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4824 if (!protected_wrapper && running_managed) {
4825 /*We are in managed code*/
4826 /*Set the thread to call */
4827 if (data->install_async_abort)
4828 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4829 return MonoResumeThread;
4832 * This will cause waits to be broken.
4833 * It will also prevent the thread from entering a wait, so if the thread returns
4834 * from the wait before it receives the abort signal, it will just spin in the wait
4835 * functions in the io-layer until the signal handler calls QueueUserAPC which will
4838 data->interrupt_token = mono_thread_info_prepare_interrupt (info);
4840 return MonoResumeThread;
4845 async_abort_internal (MonoInternalThread *thread, gboolean install_async_abort)
4847 AbortThreadData data;
4849 g_assert (thread != mono_thread_internal_current ());
4851 data.thread = thread;
4852 data.install_async_abort = install_async_abort;
4853 data.interrupt_token = NULL;
4855 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), TRUE, async_abort_critical, &data);
4856 if (data.interrupt_token)
4857 mono_thread_info_finish_interrupt (data.interrupt_token);
4858 /*FIXME we need to wait for interruption to complete -- figure out how much into interruption we should wait for here*/
4862 self_abort_internal (MonoError *error)
4868 /* FIXME this is insanely broken, it doesn't cause interruption to happen synchronously
4869 * since passing FALSE to mono_thread_request_interruption makes sure it returns NULL */
4872 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.
4874 exc = mono_thread_request_interruption (TRUE);
4876 mono_error_set_exception_instance (error, exc);
4878 mono_thread_info_self_interrupt ();
4882 MonoInternalThread *thread;
4884 MonoThreadInfoInterruptToken *interrupt_token;
4885 } SuspendThreadData;
4887 static SuspendThreadResult
4888 async_suspend_critical (MonoThreadInfo *info, gpointer ud)
4890 SuspendThreadData *data = (SuspendThreadData *)ud;
4891 MonoInternalThread *thread = data->thread;
4892 MonoJitInfo *ji = NULL;
4893 gboolean protected_wrapper;
4894 gboolean running_managed;
4896 ji = mono_thread_info_get_last_managed (info);
4897 protected_wrapper = ji && !ji->is_trampoline && !ji->async && mono_threads_is_critical_method (mono_jit_info_get_method (ji));
4898 running_managed = mono_jit_info_match (ji, MONO_CONTEXT_GET_IP (&mono_thread_info_get_suspend_state (info)->ctx));
4900 if (running_managed && !protected_wrapper) {
4901 if (mono_threads_is_coop_enabled ()) {
4902 mono_thread_info_setup_async_call (info, self_interrupt_thread, NULL);
4903 return MonoResumeThread;
4905 thread->state &= ~ThreadState_SuspendRequested;
4906 thread->state |= ThreadState_Suspended;
4907 return KeepSuspended;
4910 mono_thread_set_interruption_requested (thread);
4911 if (data->interrupt)
4912 data->interrupt_token = mono_thread_info_prepare_interrupt ((MonoThreadInfo *)thread->thread_info);
4914 return MonoResumeThread;
4918 /* LOCKING: called with @thread synch_cs held, and releases it */
4920 async_suspend_internal (MonoInternalThread *thread, gboolean interrupt)
4922 SuspendThreadData data;
4924 g_assert (thread != mono_thread_internal_current ());
4926 // MOSTLY_ASYNC_SAFE_PRINTF ("ASYNC SUSPEND thread %p\n", thread_get_tid (thread));
4928 thread->self_suspended = FALSE;
4930 data.thread = thread;
4931 data.interrupt = interrupt;
4932 data.interrupt_token = NULL;
4934 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), interrupt, async_suspend_critical, &data);
4935 if (data.interrupt_token)
4936 mono_thread_info_finish_interrupt (data.interrupt_token);
4938 UNLOCK_THREAD (thread);
4941 /* LOCKING: called with @thread synch_cs held, and releases it */
4943 self_suspend_internal (void)
4945 MonoInternalThread *thread;
4947 MonoOSEventWaitRet res;
4949 thread = mono_thread_internal_current ();
4951 // MOSTLY_ASYNC_SAFE_PRINTF ("SELF SUSPEND thread %p\n", thread_get_tid (thread));
4953 thread->self_suspended = TRUE;
4955 thread->state &= ~ThreadState_SuspendRequested;
4956 thread->state |= ThreadState_Suspended;
4958 UNLOCK_THREAD (thread);
4960 event = thread->suspended;
4963 res = mono_os_event_wait_one (event, MONO_INFINITE_WAIT, TRUE);
4964 g_assert (res == MONO_OS_EVENT_WAIT_RET_SUCCESS_0 || res == MONO_OS_EVENT_WAIT_RET_ALERTED);
4969 suspend_for_shutdown_async_call (gpointer unused)
4972 mono_thread_info_yield ();
4975 static SuspendThreadResult
4976 suspend_for_shutdown_critical (MonoThreadInfo *info, gpointer unused)
4978 mono_thread_info_setup_async_call (info, suspend_for_shutdown_async_call, NULL);
4979 return MonoResumeThread;
4983 mono_thread_internal_suspend_for_shutdown (MonoInternalThread *thread)
4985 g_assert (thread != mono_thread_internal_current ());
4987 mono_thread_info_safe_suspend_and_run (thread_get_tid (thread), FALSE, suspend_for_shutdown_critical, NULL);
4991 * mono_thread_is_foreign:
4992 * \param thread the thread to query
4994 * This function allows one to determine if a thread was created by the mono runtime and has
4995 * a well defined lifecycle or it's a foreign one, created by the native environment.
4997 * \returns TRUE if \p thread was not created by the runtime.
5000 mono_thread_is_foreign (MonoThread *thread)
5002 MonoThreadInfo *info = (MonoThreadInfo *)thread->internal_thread->thread_info;
5003 return info->runtime_thread == FALSE;
5007 * mono_add_joinable_thread:
5009 * Add TID to the list of joinable threads.
5010 * LOCKING: Acquires the threads lock.
5013 mono_threads_add_joinable_thread (gpointer tid)
5017 * We cannot detach from threads because it causes problems like
5018 * 2fd16f60/r114307. So we collect them and join them when
5019 * we have time (in he finalizer thread).
5021 joinable_threads_lock ();
5022 if (!joinable_threads)
5023 joinable_threads = g_hash_table_new (NULL, NULL);
5024 g_hash_table_insert (joinable_threads, tid, tid);
5025 UnlockedIncrement (&joinable_thread_count);
5026 joinable_threads_unlock ();
5028 mono_gc_finalize_notify ();
5033 * mono_threads_join_threads:
5035 * Join all joinable threads. This is called from the finalizer thread.
5036 * LOCKING: Acquires the threads lock.
5039 mono_threads_join_threads (void)
5042 GHashTableIter iter;
5049 if (!UnlockedRead (&joinable_thread_count))
5053 joinable_threads_lock ();
5055 if (g_hash_table_size (joinable_threads)) {
5056 g_hash_table_iter_init (&iter, joinable_threads);
5057 g_hash_table_iter_next (&iter, &key, (void**)&tid);
5058 thread = (pthread_t)tid;
5059 g_hash_table_remove (joinable_threads, key);
5060 UnlockedDecrement (&joinable_thread_count);
5063 joinable_threads_unlock ();
5065 if (thread != pthread_self ()) {
5067 /* This shouldn't block */
5068 mono_threads_join_lock ();
5069 mono_native_thread_join (thread);
5070 mono_threads_join_unlock ();
5083 * Wait for thread TID to exit.
5084 * LOCKING: Acquires the threads lock.
5087 mono_thread_join (gpointer tid)
5091 gboolean found = FALSE;
5093 joinable_threads_lock ();
5094 if (!joinable_threads)
5095 joinable_threads = g_hash_table_new (NULL, NULL);
5096 if (g_hash_table_lookup (joinable_threads, tid)) {
5097 g_hash_table_remove (joinable_threads, tid);
5098 UnlockedDecrement (&joinable_thread_count);
5101 joinable_threads_unlock ();
5104 thread = (pthread_t)tid;
5106 mono_native_thread_join (thread);
5112 mono_thread_internal_unhandled_exception (MonoObject* exc)
5114 MonoClass *klass = exc->vtable->klass;
5115 if (is_threadabort_exception (klass)) {
5116 mono_thread_internal_reset_abort (mono_thread_internal_current ());
5117 } else if (!is_appdomainunloaded_exception (klass)
5118 && mono_runtime_unhandled_exception_policy_get () == MONO_UNHANDLED_POLICY_CURRENT) {
5119 mono_unhandled_exception (exc);
5120 if (mono_environment_exitcode_get () == 1) {
5121 mono_environment_exitcode_set (255);
5122 mono_invoke_unhandled_exception_hook (exc);
5123 g_assert_not_reached ();
5129 ves_icall_System_Threading_Thread_GetStackTraces (MonoArray **out_threads, MonoArray **out_stack_traces)
5132 mono_threads_get_thread_dump (out_threads, out_stack_traces, &error);
5133 mono_error_set_pending_exception (&error);
5137 * mono_threads_attach_coop: called by native->managed wrappers
5140 * - blocking mode: contains gc unsafe transition cookie
5141 * - non-blocking mode: contains random data
5142 * - @return: the original domain which needs to be restored, or NULL.
5145 mono_threads_attach_coop (MonoDomain *domain, gpointer *dummy)
5148 MonoThreadInfo *info;
5151 orig = mono_domain_get ();
5154 /* Happens when called from AOTed code which is only used in the root domain. */
5155 domain = mono_get_root_domain ();
5159 /* On coop, when we detached, we moved the thread from RUNNING->BLOCKING.
5160 * If we try to reattach we do a BLOCKING->RUNNING transition. If the thread
5161 * is fresh, mono_thread_attach() will do a STARTING->RUNNING transition so
5162 * we're only responsible for making the cookie. */
5163 if (mono_threads_is_blocking_transition_enabled ())
5164 external = !(info = mono_thread_info_current_unchecked ()) || !mono_thread_info_is_live (info);
5166 if (!mono_thread_internal_current ()) {
5167 mono_thread_attach_full (domain, FALSE);
5170 mono_thread_set_state (mono_thread_internal_current (), ThreadState_Background);
5174 mono_domain_set (domain, TRUE);
5176 if (mono_threads_is_blocking_transition_enabled ()) {
5178 /* mono_thread_attach put the thread in RUNNING mode from STARTING, but we need to
5179 * return the right cookie. */
5180 *dummy = mono_threads_enter_gc_unsafe_region_cookie ();
5182 /* thread state (BLOCKING|RUNNING) -> RUNNING */
5183 *dummy = mono_threads_enter_gc_unsafe_region (dummy);
5191 * mono_threads_detach_coop: called by native->managed wrappers
5193 * - @cookie: the original domain which needs to be restored, or NULL.
5195 * - blocking mode: contains gc unsafe transition cookie
5196 * - non-blocking mode: contains random data
5199 mono_threads_detach_coop (gpointer cookie, gpointer *dummy)
5201 MonoDomain *domain, *orig;
5203 orig = (MonoDomain*) cookie;
5205 domain = mono_domain_get ();
5208 if (mono_threads_is_blocking_transition_enabled ()) {
5209 /* it won't do anything if cookie is NULL
5210 * thread state RUNNING -> (RUNNING|BLOCKING) */
5211 mono_threads_exit_gc_unsafe_region (*dummy, dummy);
5214 if (orig != domain) {
5216 mono_domain_unset ();
5218 mono_domain_set (orig, TRUE);
5223 /* Returns TRUE if the current thread is ready to be interrupted. */
5225 mono_threads_is_ready_to_be_interrupted (void)
5227 MonoInternalThread *thread;
5229 thread = mono_thread_internal_current ();
5230 LOCK_THREAD (thread);
5231 if (thread->state & (ThreadState_SuspendRequested | ThreadState_AbortRequested)) {
5232 UNLOCK_THREAD (thread);
5236 if (mono_thread_get_abort_prot_block_count (thread) || mono_get_eh_callbacks ()->mono_current_thread_has_handle_block_guard ()) {
5237 UNLOCK_THREAD (thread);
5241 UNLOCK_THREAD (thread);
5247 mono_thread_internal_describe (MonoInternalThread *internal, GString *text)
5249 g_string_append_printf (text, ", thread handle : %p", internal->handle);
5251 if (internal->thread_info) {
5252 g_string_append (text, ", state : ");
5253 mono_thread_info_describe_interrupt_token ((MonoThreadInfo*) internal->thread_info, text);
5256 if (internal->owned_mutexes) {
5259 g_string_append (text, ", owns : [");
5260 for (i = 0; i < internal->owned_mutexes->len; i++)
5261 g_string_append_printf (text, i == 0 ? "%p" : ", %p", g_ptr_array_index (internal->owned_mutexes, i));
5262 g_string_append (text, "]");
5267 mono_thread_internal_is_current (MonoInternalThread *internal)
5269 g_assert (internal);
5270 return mono_native_thread_id_equals (mono_native_thread_id_get (), MONO_UINT_TO_NATIVE_THREAD_ID (internal->tid));